Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1 | //===--- SemaDecl.cpp - Semantic Analysis for Declarations ----------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
Chris Lattner | 0bc735f | 2007-12-29 19:59:25 +0000 | [diff] [blame] | 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file implements semantic analysis for declarations. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
John McCall | 2d88708 | 2010-08-25 22:03:47 +0000 | [diff] [blame] | 14 | #include "clang/Sema/SemaInternal.h" |
Douglas Gregor | e737f50 | 2010-08-12 20:07:10 +0000 | [diff] [blame] | 15 | #include "clang/Sema/Initialization.h" |
| 16 | #include "clang/Sema/Lookup.h" |
John McCall | 5f1e094 | 2010-08-24 08:50:51 +0000 | [diff] [blame] | 17 | #include "clang/Sema/CXXFieldCollector.h" |
| 18 | #include "clang/Sema/Scope.h" |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 19 | #include "clang/Sema/ScopeInfo.h" |
Douglas Gregor | 9e87687 | 2011-03-01 18:12:44 +0000 | [diff] [blame] | 20 | #include "TypeLocBuilder.h" |
Anders Carlsson | c44eec6 | 2008-07-03 04:20:39 +0000 | [diff] [blame] | 21 | #include "clang/AST/APValue.h" |
Chris Lattner | e1e7985 | 2008-02-06 00:51:33 +0000 | [diff] [blame] | 22 | #include "clang/AST/ASTConsumer.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 23 | #include "clang/AST/ASTContext.h" |
Douglas Gregor | a8f32e0 | 2009-10-06 17:59:45 +0000 | [diff] [blame] | 24 | #include "clang/AST/CXXInheritance.h" |
John McCall | 384aff8 | 2010-08-25 07:42:41 +0000 | [diff] [blame] | 25 | #include "clang/AST/DeclCXX.h" |
John McCall | 7cd088e | 2010-08-24 07:21:54 +0000 | [diff] [blame] | 26 | #include "clang/AST/DeclObjC.h" |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 27 | #include "clang/AST/DeclTemplate.h" |
Chandler Carruth | a7689ef | 2011-03-27 09:46:56 +0000 | [diff] [blame] | 28 | #include "clang/AST/EvaluatedExprVisitor.h" |
Chris Lattner | 6b6b537 | 2008-06-26 18:38:35 +0000 | [diff] [blame] | 29 | #include "clang/AST/ExprCXX.h" |
Sebastian Redl | d3a413d | 2009-04-26 20:35:05 +0000 | [diff] [blame] | 30 | #include "clang/AST/StmtCXX.h" |
Argyrios Kyrtzidis | 3532fdd | 2010-11-17 23:11:54 +0000 | [diff] [blame] | 31 | #include "clang/AST/CharUnits.h" |
John McCall | 1951085 | 2010-08-20 18:27:03 +0000 | [diff] [blame] | 32 | #include "clang/Sema/DeclSpec.h" |
| 33 | #include "clang/Sema/ParsedTemplate.h" |
Douglas Gregor | a786fdb | 2009-10-13 23:27:22 +0000 | [diff] [blame] | 34 | #include "clang/Parse/ParseDiagnostic.h" |
Anders Carlsson | b790661 | 2009-08-26 23:45:07 +0000 | [diff] [blame] | 35 | #include "clang/Basic/PartialDiagnostic.h" |
Steve Naroff | 4c49a6c | 2008-01-30 23:46:05 +0000 | [diff] [blame] | 36 | #include "clang/Basic/SourceManager.h" |
Anders Carlsson | b790661 | 2009-08-26 23:45:07 +0000 | [diff] [blame] | 37 | #include "clang/Basic/TargetInfo.h" |
Steve Naroff | 4c49a6c | 2008-01-30 23:46:05 +0000 | [diff] [blame] | 38 | // FIXME: layering (ideally, Sema shouldn't be dependent on Lex API's) |
Chris Lattner | e1e7985 | 2008-02-06 00:51:33 +0000 | [diff] [blame] | 39 | #include "clang/Lex/Preprocessor.h" |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 40 | #include "clang/Lex/HeaderSearch.h" |
John McCall | 6675586 | 2009-12-24 09:58:38 +0000 | [diff] [blame] | 41 | #include "llvm/ADT/Triple.h" |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 42 | #include <algorithm> |
Douglas Gregor | 9a8c9a2 | 2009-09-28 21:14:19 +0000 | [diff] [blame] | 43 | #include <cstring> |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 44 | #include <functional> |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 45 | using namespace clang; |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 46 | using namespace sema; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 47 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 48 | Sema::DeclGroupPtrTy Sema::ConvertDeclToDeclGroup(Decl *Ptr) { |
| 49 | return DeclGroupPtrTy::make(DeclGroupRef(Ptr)); |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 50 | } |
| 51 | |
Douglas Gregor | d6efafa | 2009-02-04 19:16:12 +0000 | [diff] [blame] | 52 | /// \brief If the identifier refers to a type name within this scope, |
| 53 | /// return the declaration of that type. |
| 54 | /// |
| 55 | /// This routine performs ordinary name lookup of the identifier II |
| 56 | /// within the given scope, with optional C++ scope specifier SS, to |
Douglas Gregor | 1a51b4a | 2009-02-09 15:09:02 +0000 | [diff] [blame] | 57 | /// determine whether the name refers to a type. If so, returns an |
| 58 | /// opaque pointer (actually a QualType) corresponding to that |
| 59 | /// type. Otherwise, returns NULL. |
Douglas Gregor | d6efafa | 2009-02-04 19:16:12 +0000 | [diff] [blame] | 60 | /// |
| 61 | /// If name lookup results in an ambiguity, this routine will complain |
| 62 | /// and then return NULL. |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 63 | ParsedType Sema::getTypeName(IdentifierInfo &II, SourceLocation NameLoc, |
| 64 | Scope *S, CXXScopeSpec *SS, |
Fariborz Jahanian | 1e52dfc | 2011-02-08 18:05:59 +0000 | [diff] [blame] | 65 | bool isClassName, bool HasTrailingDot, |
Douglas Gregor | 9e87687 | 2011-03-01 18:12:44 +0000 | [diff] [blame] | 66 | ParsedType ObjectTypePtr, |
| 67 | bool WantNontrivialTypeSourceInfo) { |
Douglas Gregor | f6e6fc8 | 2009-11-20 22:03:38 +0000 | [diff] [blame] | 68 | // Determine where we will perform name lookup. |
| 69 | DeclContext *LookupCtx = 0; |
| 70 | if (ObjectTypePtr) { |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 71 | QualType ObjectType = ObjectTypePtr.get(); |
Douglas Gregor | f6e6fc8 | 2009-11-20 22:03:38 +0000 | [diff] [blame] | 72 | if (ObjectType->isRecordType()) |
| 73 | LookupCtx = computeDeclContext(ObjectType); |
Jeffrey Yasskin | edc2877 | 2010-04-07 23:29:58 +0000 | [diff] [blame] | 74 | } else if (SS && SS->isNotEmpty()) { |
Douglas Gregor | f6e6fc8 | 2009-11-20 22:03:38 +0000 | [diff] [blame] | 75 | LookupCtx = computeDeclContext(*SS, false); |
| 76 | |
| 77 | if (!LookupCtx) { |
| 78 | if (isDependentScopeSpecifier(*SS)) { |
| 79 | // C++ [temp.res]p3: |
| 80 | // A qualified-id that refers to a type and in which the |
| 81 | // nested-name-specifier depends on a template-parameter (14.6.2) |
| 82 | // shall be prefixed by the keyword typename to indicate that the |
| 83 | // qualified-id denotes a type, forming an |
| 84 | // elaborated-type-specifier (7.1.5.3). |
| 85 | // |
| 86 | // We therefore do not perform any name lookup if the result would |
| 87 | // refer to a member of an unknown specialization. |
| 88 | if (!isClassName) |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 89 | return ParsedType(); |
Douglas Gregor | f6e6fc8 | 2009-11-20 22:03:38 +0000 | [diff] [blame] | 90 | |
John McCall | 3350095 | 2010-06-11 00:33:02 +0000 | [diff] [blame] | 91 | // We know from the grammar that this name refers to a type, |
| 92 | // so build a dependent node to describe the type. |
Douglas Gregor | 9e87687 | 2011-03-01 18:12:44 +0000 | [diff] [blame] | 93 | if (WantNontrivialTypeSourceInfo) |
| 94 | return ActOnTypenameType(S, SourceLocation(), *SS, II, NameLoc).get(); |
| 95 | |
| 96 | NestedNameSpecifierLoc QualifierLoc = SS->getWithLocInContext(Context); |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 97 | QualType T = |
Douglas Gregor | 9e87687 | 2011-03-01 18:12:44 +0000 | [diff] [blame] | 98 | CheckTypenameType(ETK_None, SourceLocation(), QualifierLoc, |
Douglas Gregor | e29425b | 2011-02-28 22:42:13 +0000 | [diff] [blame] | 99 | II, NameLoc); |
Douglas Gregor | 9e87687 | 2011-03-01 18:12:44 +0000 | [diff] [blame] | 100 | |
| 101 | return ParsedType::make(T); |
Douglas Gregor | f6e6fc8 | 2009-11-20 22:03:38 +0000 | [diff] [blame] | 102 | } |
| 103 | |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 104 | return ParsedType(); |
Douglas Gregor | f6e6fc8 | 2009-11-20 22:03:38 +0000 | [diff] [blame] | 105 | } |
| 106 | |
John McCall | 77bb1aa | 2010-05-01 00:40:08 +0000 | [diff] [blame] | 107 | if (!LookupCtx->isDependentContext() && |
| 108 | RequireCompleteDeclContext(*SS, LookupCtx)) |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 109 | return ParsedType(); |
Douglas Gregor | 42c39f3 | 2009-08-26 18:27:52 +0000 | [diff] [blame] | 110 | } |
Eli Friedman | 0f0615b | 2009-12-21 01:42:38 +0000 | [diff] [blame] | 111 | |
| 112 | // FIXME: LookupNestedNameSpecifierName isn't the right kind of |
| 113 | // lookup for class-names. |
| 114 | LookupNameKind Kind = isClassName ? LookupNestedNameSpecifierName : |
| 115 | LookupOrdinaryName; |
| 116 | LookupResult Result(*this, &II, NameLoc, Kind); |
Douglas Gregor | f6e6fc8 | 2009-11-20 22:03:38 +0000 | [diff] [blame] | 117 | if (LookupCtx) { |
| 118 | // Perform "qualified" name lookup into the declaration context we |
| 119 | // computed, which is either the type of the base of a member access |
| 120 | // expression or the declaration context associated with a prior |
| 121 | // nested-name-specifier. |
| 122 | LookupQualifiedName(Result, LookupCtx); |
Douglas Gregor | 42af25f | 2009-05-11 19:58:34 +0000 | [diff] [blame] | 123 | |
Douglas Gregor | f6e6fc8 | 2009-11-20 22:03:38 +0000 | [diff] [blame] | 124 | if (ObjectTypePtr && Result.empty()) { |
| 125 | // C++ [basic.lookup.classref]p3: |
| 126 | // If the unqualified-id is ~type-name, the type-name is looked up |
| 127 | // in the context of the entire postfix-expression. If the type T of |
| 128 | // the object expression is of a class type C, the type-name is also |
| 129 | // looked up in the scope of class C. At least one of the lookups shall |
| 130 | // find a name that refers to (possibly cv-qualified) T. |
| 131 | LookupName(Result, S); |
| 132 | } |
| 133 | } else { |
| 134 | // Perform unqualified name lookup. |
| 135 | LookupName(Result, S); |
| 136 | } |
| 137 | |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 138 | NamedDecl *IIDecl = 0; |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 139 | switch (Result.getResultKind()) { |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 140 | case LookupResult::NotFound: |
Douglas Gregor | 7d3f576 | 2010-01-15 01:44:47 +0000 | [diff] [blame] | 141 | case LookupResult::NotFoundInCurrentInstantiation: |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 142 | case LookupResult::FoundOverloaded: |
John McCall | 7ba107a | 2009-11-18 02:36:19 +0000 | [diff] [blame] | 143 | case LookupResult::FoundUnresolvedValue: |
John McCall | c373d48 | 2010-01-27 01:50:18 +0000 | [diff] [blame] | 144 | Result.suppressDiagnostics(); |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 145 | return ParsedType(); |
Douglas Gregor | b696ea3 | 2009-02-04 17:00:24 +0000 | [diff] [blame] | 146 | |
Chris Lattner | a64ef0a | 2009-10-25 22:09:09 +0000 | [diff] [blame] | 147 | case LookupResult::Ambiguous: |
John McCall | 6e24726 | 2009-10-10 05:48:19 +0000 | [diff] [blame] | 148 | // Recover from type-hiding ambiguities by hiding the type. We'll |
| 149 | // do the lookup again when looking for an object, and we can |
| 150 | // diagnose the error then. If we don't do this, then the error |
| 151 | // about hiding the type will be immediately followed by an error |
| 152 | // that only makes sense if the identifier was treated like a type. |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 153 | if (Result.getAmbiguityKind() == LookupResult::AmbiguousTagHiding) { |
| 154 | Result.suppressDiagnostics(); |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 155 | return ParsedType(); |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 156 | } |
John McCall | 6e24726 | 2009-10-10 05:48:19 +0000 | [diff] [blame] | 157 | |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 158 | // Look to see if we have a type anywhere in the list of results. |
| 159 | for (LookupResult::iterator Res = Result.begin(), ResEnd = Result.end(); |
| 160 | Res != ResEnd; ++Res) { |
| 161 | if (isa<TypeDecl>(*Res) || isa<ObjCInterfaceDecl>(*Res)) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 162 | if (!IIDecl || |
| 163 | (*Res)->getLocation().getRawEncoding() < |
Douglas Gregor | 841b53c | 2009-04-13 15:14:38 +0000 | [diff] [blame] | 164 | IIDecl->getLocation().getRawEncoding()) |
| 165 | IIDecl = *Res; |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 166 | } |
| 167 | } |
| 168 | |
| 169 | if (!IIDecl) { |
| 170 | // None of the entities we found is a type, so there is no way |
| 171 | // to even assume that the result is a type. In this case, don't |
| 172 | // complain about the ambiguity. The parser will either try to |
| 173 | // perform this lookup again (e.g., as an object name), which |
| 174 | // will produce the ambiguity, or will complain that it expected |
| 175 | // a type name. |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 176 | Result.suppressDiagnostics(); |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 177 | return ParsedType(); |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 178 | } |
| 179 | |
| 180 | // We found a type within the ambiguous lookup; diagnose the |
| 181 | // ambiguity and then return that type. This might be the right |
| 182 | // answer, or it might not be, but it suppresses any attempt to |
| 183 | // perform the name lookup again. |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 184 | break; |
Douglas Gregor | b696ea3 | 2009-02-04 17:00:24 +0000 | [diff] [blame] | 185 | |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 186 | case LookupResult::Found: |
John McCall | f36e02d | 2009-10-09 21:13:30 +0000 | [diff] [blame] | 187 | IIDecl = Result.getFoundDecl(); |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 188 | break; |
Douglas Gregor | 7176fff | 2009-01-15 00:26:24 +0000 | [diff] [blame] | 189 | } |
| 190 | |
Chris Lattner | 10ca337 | 2009-10-25 17:16:46 +0000 | [diff] [blame] | 191 | assert(IIDecl && "Didn't find decl"); |
John McCall | 54abf7d | 2009-11-04 02:18:39 +0000 | [diff] [blame] | 192 | |
Chris Lattner | 10ca337 | 2009-10-25 17:16:46 +0000 | [diff] [blame] | 193 | QualType T; |
| 194 | if (TypeDecl *TD = dyn_cast<TypeDecl>(IIDecl)) { |
John McCall | 54abf7d | 2009-11-04 02:18:39 +0000 | [diff] [blame] | 195 | DiagnoseUseOfDecl(IIDecl, NameLoc); |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 196 | |
Chris Lattner | 10ca337 | 2009-10-25 17:16:46 +0000 | [diff] [blame] | 197 | if (T.isNull()) |
| 198 | T = Context.getTypeDeclType(TD); |
| 199 | |
Douglas Gregor | 9e87687 | 2011-03-01 18:12:44 +0000 | [diff] [blame] | 200 | if (SS && SS->isNotEmpty()) { |
| 201 | if (WantNontrivialTypeSourceInfo) { |
| 202 | // Construct a type with type-source information. |
| 203 | TypeLocBuilder Builder; |
| 204 | Builder.pushTypeSpec(T).setNameLoc(NameLoc); |
| 205 | |
| 206 | T = getElaboratedType(ETK_None, *SS, T); |
| 207 | ElaboratedTypeLoc ElabTL = Builder.push<ElaboratedTypeLoc>(T); |
| 208 | ElabTL.setKeywordLoc(SourceLocation()); |
| 209 | ElabTL.setQualifierLoc(SS->getWithLocInContext(Context)); |
| 210 | return CreateParsedType(T, Builder.getTypeSourceInfo(Context, T)); |
| 211 | } else { |
| 212 | T = getElaboratedType(ETK_None, *SS, T); |
| 213 | } |
| 214 | } |
Chris Lattner | 10ca337 | 2009-10-25 17:16:46 +0000 | [diff] [blame] | 215 | } else if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(IIDecl)) { |
Fariborz Jahanian | 02b0d65 | 2011-03-08 19:12:46 +0000 | [diff] [blame] | 216 | (void)DiagnoseUseOfDecl(IDecl, NameLoc); |
Fariborz Jahanian | 1e52dfc | 2011-02-08 18:05:59 +0000 | [diff] [blame] | 217 | if (!HasTrailingDot) |
| 218 | T = Context.getObjCInterfaceType(IDecl); |
| 219 | } |
| 220 | |
| 221 | if (T.isNull()) { |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 222 | // If it's not plausibly a type, suppress diagnostics. |
| 223 | Result.suppressDiagnostics(); |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 224 | return ParsedType(); |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 225 | } |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 226 | return ParsedType::make(T); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 227 | } |
| 228 | |
Chris Lattner | 4c97d76 | 2009-04-12 21:49:30 +0000 | [diff] [blame] | 229 | /// isTagName() - This method is called *for error recovery purposes only* |
| 230 | /// to determine if the specified name is a valid tag name ("struct foo"). If |
| 231 | /// so, this returns the TST for the tag corresponding to it (TST_enum, |
| 232 | /// TST_union, TST_struct, TST_class). This is used to diagnose cases in C |
| 233 | /// where the user forgot to specify the tag. |
| 234 | DeclSpec::TST Sema::isTagName(IdentifierInfo &II, Scope *S) { |
| 235 | // Do a tag name lookup in this scope. |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 236 | LookupResult R(*this, &II, SourceLocation(), LookupTagName); |
| 237 | LookupName(R, S, false); |
| 238 | R.suppressDiagnostics(); |
| 239 | if (R.getResultKind() == LookupResult::Found) |
John McCall | 1bcee0a | 2009-12-02 08:25:40 +0000 | [diff] [blame] | 240 | if (const TagDecl *TD = R.getAsSingle<TagDecl>()) { |
Chris Lattner | 4c97d76 | 2009-04-12 21:49:30 +0000 | [diff] [blame] | 241 | switch (TD->getTagKind()) { |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 242 | default: return DeclSpec::TST_unspecified; |
| 243 | case TTK_Struct: return DeclSpec::TST_struct; |
| 244 | case TTK_Union: return DeclSpec::TST_union; |
| 245 | case TTK_Class: return DeclSpec::TST_class; |
| 246 | case TTK_Enum: return DeclSpec::TST_enum; |
Chris Lattner | 4c97d76 | 2009-04-12 21:49:30 +0000 | [diff] [blame] | 247 | } |
| 248 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 249 | |
Chris Lattner | 4c97d76 | 2009-04-12 21:49:30 +0000 | [diff] [blame] | 250 | return DeclSpec::TST_unspecified; |
| 251 | } |
| 252 | |
Francois Pichet | 6943e9b | 2011-04-13 02:38:49 +0000 | [diff] [blame] | 253 | /// isMicrosoftMissingTypename - In Microsoft mode, within class scope, |
| 254 | /// if a CXXScopeSpec's type is equal to the type of one of the base classes |
| 255 | /// then downgrade the missing typename error to a warning. |
| 256 | /// This is needed for MSVC compatibility; Example: |
| 257 | /// @code |
| 258 | /// template<class T> class A { |
| 259 | /// public: |
| 260 | /// typedef int TYPE; |
| 261 | /// }; |
| 262 | /// template<class T> class B : public A<T> { |
| 263 | /// public: |
| 264 | /// A<T>::TYPE a; // no typename required because A<T> is a base class. |
| 265 | /// }; |
| 266 | /// @endcode |
| 267 | bool Sema::isMicrosoftMissingTypename(const CXXScopeSpec *SS) { |
| 268 | if (CurContext->isRecord()) { |
Francois Pichet | 3441a52 | 2011-04-13 02:44:57 +0000 | [diff] [blame] | 269 | const Type *Ty = SS->getScopeRep()->getAsType(); |
Francois Pichet | 6943e9b | 2011-04-13 02:38:49 +0000 | [diff] [blame] | 270 | |
| 271 | CXXRecordDecl *RD = cast<CXXRecordDecl>(CurContext); |
| 272 | for (CXXRecordDecl::base_class_const_iterator Base = RD->bases_begin(), |
| 273 | BaseEnd = RD->bases_end(); Base != BaseEnd; ++Base) |
| 274 | if (Context.hasSameUnqualifiedType(QualType(Ty, 1), Base->getType())) |
| 275 | return true; |
| 276 | } |
| 277 | return false; |
| 278 | } |
| 279 | |
Douglas Gregor | a786fdb | 2009-10-13 23:27:22 +0000 | [diff] [blame] | 280 | bool Sema::DiagnoseUnknownTypeName(const IdentifierInfo &II, |
| 281 | SourceLocation IILoc, |
| 282 | Scope *S, |
Jeffrey Yasskin | 9ab1454 | 2010-04-08 16:38:48 +0000 | [diff] [blame] | 283 | CXXScopeSpec *SS, |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 284 | ParsedType &SuggestedType) { |
Douglas Gregor | a786fdb | 2009-10-13 23:27:22 +0000 | [diff] [blame] | 285 | // We don't have anything to suggest (yet). |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 286 | SuggestedType = ParsedType(); |
Douglas Gregor | a786fdb | 2009-10-13 23:27:22 +0000 | [diff] [blame] | 287 | |
Douglas Gregor | 546be3c | 2009-12-30 17:04:44 +0000 | [diff] [blame] | 288 | // There may have been a typo in the name of the type. Look up typo |
| 289 | // results, in case we have something that we can suggest. |
| 290 | LookupResult Lookup(*this, &II, IILoc, LookupOrdinaryName, |
| 291 | NotForRedeclaration); |
| 292 | |
Douglas Gregor | aaf8716 | 2010-04-14 20:04:41 +0000 | [diff] [blame] | 293 | if (DeclarationName Corrected = CorrectTypo(Lookup, S, SS, 0, 0, CTC_Type)) { |
| 294 | if (NamedDecl *Result = Lookup.getAsSingle<NamedDecl>()) { |
| 295 | if ((isa<TypeDecl>(Result) || isa<ObjCInterfaceDecl>(Result)) && |
| 296 | !Result->isInvalidDecl()) { |
| 297 | // We found a similarly-named type or interface; suggest that. |
| 298 | if (!SS || !SS->isSet()) |
| 299 | Diag(IILoc, diag::err_unknown_typename_suggest) |
| 300 | << &II << Lookup.getLookupName() |
| 301 | << FixItHint::CreateReplacement(SourceRange(IILoc), |
| 302 | Result->getNameAsString()); |
| 303 | else if (DeclContext *DC = computeDeclContext(*SS, false)) |
| 304 | Diag(IILoc, diag::err_unknown_nested_typename_suggest) |
| 305 | << &II << DC << Lookup.getLookupName() << SS->getRange() |
| 306 | << FixItHint::CreateReplacement(SourceRange(IILoc), |
| 307 | Result->getNameAsString()); |
| 308 | else |
| 309 | llvm_unreachable("could not have corrected a typo here"); |
Douglas Gregor | 546be3c | 2009-12-30 17:04:44 +0000 | [diff] [blame] | 310 | |
Douglas Gregor | aaf8716 | 2010-04-14 20:04:41 +0000 | [diff] [blame] | 311 | Diag(Result->getLocation(), diag::note_previous_decl) |
| 312 | << Result->getDeclName(); |
| 313 | |
Douglas Gregor | 9e87687 | 2011-03-01 18:12:44 +0000 | [diff] [blame] | 314 | SuggestedType = getTypeName(*Result->getIdentifier(), IILoc, S, SS, |
| 315 | false, false, ParsedType(), |
| 316 | /*NonTrivialTypeSourceInfo=*/true); |
Douglas Gregor | aaf8716 | 2010-04-14 20:04:41 +0000 | [diff] [blame] | 317 | return true; |
| 318 | } |
| 319 | } else if (Lookup.empty()) { |
| 320 | // We corrected to a keyword. |
| 321 | // FIXME: Actually recover with the keyword we suggest, and emit a fix-it. |
| 322 | Diag(IILoc, diag::err_unknown_typename_suggest) |
| 323 | << &II << Corrected; |
| 324 | return true; |
Douglas Gregor | 546be3c | 2009-12-30 17:04:44 +0000 | [diff] [blame] | 325 | } |
| 326 | } |
| 327 | |
Jeffrey Yasskin | c173be2 | 2010-04-08 21:04:54 +0000 | [diff] [blame] | 328 | if (getLangOptions().CPlusPlus) { |
| 329 | // See if II is a class template that the user forgot to pass arguments to. |
| 330 | UnqualifiedId Name; |
| 331 | Name.setIdentifier(&II, IILoc); |
| 332 | CXXScopeSpec EmptySS; |
| 333 | TemplateTy TemplateResult; |
Douglas Gregor | 1fd6d44 | 2010-05-21 23:18:07 +0000 | [diff] [blame] | 334 | bool MemberOfUnknownSpecialization; |
Abramo Bagnara | 7c15353 | 2010-08-06 12:11:11 +0000 | [diff] [blame] | 335 | if (isTemplateName(S, SS ? *SS : EmptySS, /*hasTemplateKeyword=*/false, |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 336 | Name, ParsedType(), true, TemplateResult, |
Douglas Gregor | 1fd6d44 | 2010-05-21 23:18:07 +0000 | [diff] [blame] | 337 | MemberOfUnknownSpecialization) == TNK_Type_template) { |
Jeffrey Yasskin | c173be2 | 2010-04-08 21:04:54 +0000 | [diff] [blame] | 338 | TemplateName TplName = TemplateResult.getAsVal<TemplateName>(); |
| 339 | Diag(IILoc, diag::err_template_missing_args) << TplName; |
| 340 | if (TemplateDecl *TplDecl = TplName.getAsTemplateDecl()) { |
| 341 | Diag(TplDecl->getLocation(), diag::note_template_decl_here) |
| 342 | << TplDecl->getTemplateParameters()->getSourceRange(); |
| 343 | } |
| 344 | return true; |
| 345 | } |
| 346 | } |
| 347 | |
Douglas Gregor | a786fdb | 2009-10-13 23:27:22 +0000 | [diff] [blame] | 348 | // FIXME: Should we move the logic that tries to recover from a missing tag |
| 349 | // (struct, union, enum) from Parser::ParseImplicitInt here, instead? |
| 350 | |
Douglas Gregor | 546be3c | 2009-12-30 17:04:44 +0000 | [diff] [blame] | 351 | if (!SS || (!SS->isSet() && !SS->isInvalid())) |
Douglas Gregor | a786fdb | 2009-10-13 23:27:22 +0000 | [diff] [blame] | 352 | Diag(IILoc, diag::err_unknown_typename) << &II; |
| 353 | else if (DeclContext *DC = computeDeclContext(*SS, false)) |
| 354 | Diag(IILoc, diag::err_typename_nested_not_found) |
| 355 | << &II << DC << SS->getRange(); |
| 356 | else if (isDependentScopeSpecifier(*SS)) { |
Francois Pichet | 6943e9b | 2011-04-13 02:38:49 +0000 | [diff] [blame] | 357 | unsigned DiagID = diag::err_typename_missing; |
| 358 | if (getLangOptions().Microsoft && isMicrosoftMissingTypename(SS)) |
Francois Pichet | cf320c6 | 2011-04-22 08:25:24 +0000 | [diff] [blame] | 359 | DiagID = diag::warn_typename_missing; |
Francois Pichet | 6943e9b | 2011-04-13 02:38:49 +0000 | [diff] [blame] | 360 | |
| 361 | Diag(SS->getRange().getBegin(), DiagID) |
Daniel Dunbar | 01eb9b9 | 2009-10-18 21:17:35 +0000 | [diff] [blame] | 362 | << (NestedNameSpecifier *)SS->getScopeRep() << II.getName() |
Douglas Gregor | a786fdb | 2009-10-13 23:27:22 +0000 | [diff] [blame] | 363 | << SourceRange(SS->getRange().getBegin(), IILoc) |
Douglas Gregor | 849b243 | 2010-03-31 17:46:05 +0000 | [diff] [blame] | 364 | << FixItHint::CreateInsertion(SS->getRange().getBegin(), "typename "); |
Douglas Gregor | 1a15dae | 2010-06-16 22:31:08 +0000 | [diff] [blame] | 365 | SuggestedType = ActOnTypenameType(S, SourceLocation(), *SS, II, IILoc).get(); |
Douglas Gregor | a786fdb | 2009-10-13 23:27:22 +0000 | [diff] [blame] | 366 | } else { |
| 367 | assert(SS && SS->isInvalid() && |
| 368 | "Invalid scope specifier has already been diagnosed"); |
| 369 | } |
| 370 | |
| 371 | return true; |
| 372 | } |
Chris Lattner | 4c97d76 | 2009-04-12 21:49:30 +0000 | [diff] [blame] | 373 | |
Douglas Gregor | 312eadb | 2011-04-24 05:37:28 +0000 | [diff] [blame] | 374 | /// \brief Determine whether the given result set contains either a type name |
| 375 | /// or |
| 376 | static bool isResultTypeOrTemplate(LookupResult &R, const Token &NextToken) { |
| 377 | bool CheckTemplate = R.getSema().getLangOptions().CPlusPlus && |
| 378 | NextToken.is(tok::less); |
| 379 | |
| 380 | for (LookupResult::iterator I = R.begin(), IEnd = R.end(); I != IEnd; ++I) { |
| 381 | if (isa<TypeDecl>(*I) || isa<ObjCInterfaceDecl>(*I)) |
| 382 | return true; |
| 383 | |
| 384 | if (CheckTemplate && isa<TemplateDecl>(*I)) |
| 385 | return true; |
| 386 | } |
| 387 | |
| 388 | return false; |
| 389 | } |
| 390 | |
| 391 | Sema::NameClassification Sema::ClassifyName(Scope *S, |
| 392 | CXXScopeSpec &SS, |
| 393 | IdentifierInfo *&Name, |
| 394 | SourceLocation NameLoc, |
| 395 | const Token &NextToken) { |
| 396 | DeclarationNameInfo NameInfo(Name, NameLoc); |
| 397 | ObjCMethodDecl *CurMethod = getCurMethodDecl(); |
| 398 | |
| 399 | if (NextToken.is(tok::coloncolon)) { |
| 400 | BuildCXXNestedNameSpecifier(S, *Name, NameLoc, NextToken.getLocation(), |
| 401 | QualType(), false, SS, 0, false); |
| 402 | |
| 403 | } |
| 404 | |
| 405 | LookupResult Result(*this, Name, NameLoc, LookupOrdinaryName); |
| 406 | LookupParsedName(Result, S, &SS, !CurMethod); |
| 407 | |
| 408 | // Perform lookup for Objective-C instance variables (including automatically |
| 409 | // synthesized instance variables), if we're in an Objective-C method. |
| 410 | // FIXME: This lookup really, really needs to be folded in to the normal |
| 411 | // unqualified lookup mechanism. |
| 412 | if (!SS.isSet() && CurMethod && !isResultTypeOrTemplate(Result, NextToken)) { |
| 413 | ExprResult E = LookupInObjCMethod(Result, S, Name, true); |
Douglas Gregor | ec385cf | 2011-04-25 15:05:41 +0000 | [diff] [blame] | 414 | if (E.get() || E.isInvalid()) |
Douglas Gregor | 312eadb | 2011-04-24 05:37:28 +0000 | [diff] [blame] | 415 | return E; |
| 416 | |
| 417 | // Synthesize ivars lazily. |
| 418 | if (getLangOptions().ObjCDefaultSynthProperties && |
| 419 | getLangOptions().ObjCNonFragileABI2) { |
| 420 | if (SynthesizeProvisionalIvar(Result, Name, NameLoc)) { |
| 421 | if (const ObjCPropertyDecl *Property = |
| 422 | canSynthesizeProvisionalIvar(Name)) { |
| 423 | Diag(NameLoc, diag::warn_synthesized_ivar_access) << Name; |
| 424 | Diag(Property->getLocation(), diag::note_property_declare); |
| 425 | } |
| 426 | |
| 427 | // FIXME: This is strange. Shouldn't we just take the ivar returned |
| 428 | // from SynthesizeProvisionalIvar and continue with that? |
Douglas Gregor | ec385cf | 2011-04-25 15:05:41 +0000 | [diff] [blame] | 429 | E = LookupInObjCMethod(Result, S, Name, true); |
| 430 | if (E.get() || E.isInvalid()) |
Douglas Gregor | 312eadb | 2011-04-24 05:37:28 +0000 | [diff] [blame] | 431 | return E; |
| 432 | } |
| 433 | } |
| 434 | } |
| 435 | |
| 436 | bool SecondTry = false; |
| 437 | bool IsFilteredTemplateName = false; |
| 438 | |
| 439 | Corrected: |
| 440 | switch (Result.getResultKind()) { |
| 441 | case LookupResult::NotFound: |
| 442 | // If an unqualified-id is followed by a '(', then we have a function |
| 443 | // call. |
| 444 | if (!SS.isSet() && NextToken.is(tok::l_paren)) { |
| 445 | // In C++, this is an ADL-only call. |
| 446 | // FIXME: Reference? |
| 447 | if (getLangOptions().CPlusPlus) |
| 448 | return BuildDeclarationNameExpr(SS, Result, /*ADL=*/true); |
| 449 | |
| 450 | // C90 6.3.2.2: |
| 451 | // If the expression that precedes the parenthesized argument list in a |
| 452 | // function call consists solely of an identifier, and if no |
| 453 | // declaration is visible for this identifier, the identifier is |
| 454 | // implicitly declared exactly as if, in the innermost block containing |
| 455 | // the function call, the declaration |
| 456 | // |
| 457 | // extern int identifier (); |
| 458 | // |
| 459 | // appeared. |
| 460 | // |
| 461 | // We also allow this in C99 as an extension. |
| 462 | if (NamedDecl *D = ImplicitlyDefineFunction(NameLoc, *Name, S)) { |
| 463 | Result.addDecl(D); |
| 464 | Result.resolveKind(); |
| 465 | return BuildDeclarationNameExpr(SS, Result, /*ADL=*/false); |
| 466 | } |
| 467 | } |
| 468 | |
| 469 | // In C, we first see whether there is a tag type by the same name, in |
| 470 | // which case it's likely that the user just forget to write "enum", |
| 471 | // "struct", or "union". |
| 472 | if (!getLangOptions().CPlusPlus && !SecondTry) { |
| 473 | Result.clear(LookupTagName); |
| 474 | LookupParsedName(Result, S, &SS); |
| 475 | if (TagDecl *Tag = Result.getAsSingle<TagDecl>()) { |
| 476 | const char *TagName = 0; |
| 477 | const char *FixItTagName = 0; |
| 478 | switch (Tag->getTagKind()) { |
| 479 | case TTK_Class: |
| 480 | TagName = "class"; |
| 481 | FixItTagName = "class "; |
| 482 | break; |
| 483 | |
| 484 | case TTK_Enum: |
| 485 | TagName = "enum"; |
| 486 | FixItTagName = "enum "; |
| 487 | break; |
| 488 | |
| 489 | case TTK_Struct: |
| 490 | TagName = "struct"; |
| 491 | FixItTagName = "struct "; |
| 492 | break; |
| 493 | |
| 494 | case TTK_Union: |
| 495 | TagName = "union"; |
| 496 | FixItTagName = "union "; |
| 497 | break; |
| 498 | } |
| 499 | |
| 500 | Diag(NameLoc, diag::err_use_of_tag_name_without_tag) |
| 501 | << Name << TagName << getLangOptions().CPlusPlus |
| 502 | << FixItHint::CreateInsertion(NameLoc, FixItTagName); |
| 503 | break; |
| 504 | } |
| 505 | |
| 506 | Result.clear(LookupOrdinaryName); |
| 507 | } |
| 508 | |
| 509 | // Perform typo correction to determine if there is another name that is |
| 510 | // close to this name. |
| 511 | if (!SecondTry) { |
| 512 | if (DeclarationName Corrected = CorrectTypo(Result, S, &SS)) { |
Douglas Gregor | 27766d2 | 2011-04-27 03:47:06 +0000 | [diff] [blame] | 513 | unsigned UnqualifiedDiag = diag::err_undeclared_var_use_suggest; |
| 514 | unsigned QualifiedDiag = diag::err_no_member_suggest; |
| 515 | |
| 516 | NamedDecl *FirstDecl = Result.empty()? 0 : *Result.begin(); |
Douglas Gregor | 3b88735 | 2011-04-27 04:48:22 +0000 | [diff] [blame] | 517 | NamedDecl *UnderlyingFirstDecl |
| 518 | = FirstDecl? FirstDecl->getUnderlyingDecl() : 0; |
Douglas Gregor | 27766d2 | 2011-04-27 03:47:06 +0000 | [diff] [blame] | 519 | if (getLangOptions().CPlusPlus && NextToken.is(tok::less) && |
Douglas Gregor | 3b88735 | 2011-04-27 04:48:22 +0000 | [diff] [blame] | 520 | UnderlyingFirstDecl && isa<TemplateDecl>(UnderlyingFirstDecl)) { |
Douglas Gregor | 27766d2 | 2011-04-27 03:47:06 +0000 | [diff] [blame] | 521 | UnqualifiedDiag = diag::err_no_template_suggest; |
| 522 | QualifiedDiag = diag::err_no_member_template_suggest; |
Douglas Gregor | 3b88735 | 2011-04-27 04:48:22 +0000 | [diff] [blame] | 523 | } else if (UnderlyingFirstDecl && |
| 524 | (isa<TypeDecl>(UnderlyingFirstDecl) || |
| 525 | isa<ObjCInterfaceDecl>(UnderlyingFirstDecl) || |
| 526 | isa<ObjCCompatibleAliasDecl>(UnderlyingFirstDecl))) { |
Douglas Gregor | 27766d2 | 2011-04-27 03:47:06 +0000 | [diff] [blame] | 527 | UnqualifiedDiag = diag::err_unknown_typename_suggest; |
| 528 | QualifiedDiag = diag::err_unknown_nested_typename_suggest; |
| 529 | } |
| 530 | |
Douglas Gregor | 312eadb | 2011-04-24 05:37:28 +0000 | [diff] [blame] | 531 | if (SS.isEmpty()) |
Douglas Gregor | 27766d2 | 2011-04-27 03:47:06 +0000 | [diff] [blame] | 532 | Diag(NameLoc, UnqualifiedDiag) |
Douglas Gregor | 312eadb | 2011-04-24 05:37:28 +0000 | [diff] [blame] | 533 | << Name << Corrected |
| 534 | << FixItHint::CreateReplacement(NameLoc, Corrected.getAsString()); |
| 535 | else |
Douglas Gregor | 27766d2 | 2011-04-27 03:47:06 +0000 | [diff] [blame] | 536 | Diag(NameLoc, QualifiedDiag) |
Douglas Gregor | 312eadb | 2011-04-24 05:37:28 +0000 | [diff] [blame] | 537 | << Name << computeDeclContext(SS, false) << Corrected |
| 538 | << SS.getRange() |
| 539 | << FixItHint::CreateReplacement(NameLoc, Corrected.getAsString()); |
| 540 | |
| 541 | // Update the name, so that the caller has the new name. |
| 542 | Name = Corrected.getAsIdentifierInfo(); |
| 543 | |
| 544 | // Typo correction corrected to a keyword. |
| 545 | if (Result.empty()) |
| 546 | return Corrected.getAsIdentifierInfo(); |
| 547 | |
Douglas Gregor | 312eadb | 2011-04-24 05:37:28 +0000 | [diff] [blame] | 548 | Diag(FirstDecl->getLocation(), diag::note_previous_decl) |
| 549 | << FirstDecl->getDeclName(); |
| 550 | |
| 551 | // If we found an Objective-C instance variable, let |
| 552 | // LookupInObjCMethod build the appropriate expression to |
| 553 | // reference the ivar. |
| 554 | // FIXME: This is a gross hack. |
| 555 | if (ObjCIvarDecl *Ivar = Result.getAsSingle<ObjCIvarDecl>()) { |
| 556 | Result.clear(); |
| 557 | ExprResult E(LookupInObjCMethod(Result, S, Ivar->getIdentifier())); |
| 558 | return move(E); |
| 559 | } |
| 560 | |
| 561 | goto Corrected; |
| 562 | } |
| 563 | } |
| 564 | |
| 565 | // We failed to correct; just fall through and let the parser deal with it. |
| 566 | Result.suppressDiagnostics(); |
| 567 | return NameClassification::Unknown(); |
| 568 | |
| 569 | case LookupResult::NotFoundInCurrentInstantiation: |
| 570 | // We performed name lookup into the current instantiation, and there were |
| 571 | // dependent bases, so we treat this result the same way as any other |
| 572 | // dependent nested-name-specifier. |
| 573 | |
| 574 | // C++ [temp.res]p2: |
| 575 | // A name used in a template declaration or definition and that is |
| 576 | // dependent on a template-parameter is assumed not to name a type |
| 577 | // unless the applicable name lookup finds a type name or the name is |
| 578 | // qualified by the keyword typename. |
| 579 | // |
| 580 | // FIXME: If the next token is '<', we might want to ask the parser to |
| 581 | // perform some heroics to see if we actually have a |
| 582 | // template-argument-list, which would indicate a missing 'template' |
| 583 | // keyword here. |
| 584 | return BuildDependentDeclRefExpr(SS, NameInfo, /*TemplateArgs=*/0); |
| 585 | |
| 586 | case LookupResult::Found: |
| 587 | case LookupResult::FoundOverloaded: |
| 588 | case LookupResult::FoundUnresolvedValue: |
| 589 | break; |
| 590 | |
| 591 | case LookupResult::Ambiguous: |
Douglas Gregor | 3b88735 | 2011-04-27 04:48:22 +0000 | [diff] [blame] | 592 | if (getLangOptions().CPlusPlus && NextToken.is(tok::less) && |
| 593 | hasAnyAcceptableTemplateNames(Result)) { |
Douglas Gregor | 312eadb | 2011-04-24 05:37:28 +0000 | [diff] [blame] | 594 | // C++ [temp.local]p3: |
| 595 | // A lookup that finds an injected-class-name (10.2) can result in an |
| 596 | // ambiguity in certain cases (for example, if it is found in more than |
| 597 | // one base class). If all of the injected-class-names that are found |
| 598 | // refer to specializations of the same class template, and if the name |
| 599 | // is followed by a template-argument-list, the reference refers to the |
| 600 | // class template itself and not a specialization thereof, and is not |
| 601 | // ambiguous. |
| 602 | // |
| 603 | // This filtering can make an ambiguous result into an unambiguous one, |
| 604 | // so try again after filtering out template names. |
| 605 | FilterAcceptableTemplateNames(Result); |
| 606 | if (!Result.isAmbiguous()) { |
| 607 | IsFilteredTemplateName = true; |
| 608 | break; |
| 609 | } |
| 610 | } |
| 611 | |
| 612 | // Diagnose the ambiguity and return an error. |
| 613 | return NameClassification::Error(); |
| 614 | } |
| 615 | |
| 616 | if (getLangOptions().CPlusPlus && NextToken.is(tok::less) && |
| 617 | (IsFilteredTemplateName || hasAnyAcceptableTemplateNames(Result))) { |
| 618 | // C++ [temp.names]p3: |
| 619 | // After name lookup (3.4) finds that a name is a template-name or that |
| 620 | // an operator-function-id or a literal- operator-id refers to a set of |
| 621 | // overloaded functions any member of which is a function template if |
| 622 | // this is followed by a <, the < is always taken as the delimiter of a |
| 623 | // template-argument-list and never as the less-than operator. |
| 624 | if (!IsFilteredTemplateName) |
| 625 | FilterAcceptableTemplateNames(Result); |
| 626 | |
Douglas Gregor | 3b88735 | 2011-04-27 04:48:22 +0000 | [diff] [blame] | 627 | if (!Result.empty()) { |
| 628 | bool IsFunctionTemplate; |
| 629 | TemplateName Template; |
| 630 | if (Result.end() - Result.begin() > 1) { |
| 631 | IsFunctionTemplate = true; |
| 632 | Template = Context.getOverloadedTemplateName(Result.begin(), |
| 633 | Result.end()); |
| 634 | } else { |
| 635 | TemplateDecl *TD |
| 636 | = cast<TemplateDecl>((*Result.begin())->getUnderlyingDecl()); |
| 637 | IsFunctionTemplate = isa<FunctionTemplateDecl>(TD); |
| 638 | |
| 639 | if (SS.isSet() && !SS.isInvalid()) |
| 640 | Template = Context.getQualifiedTemplateName(SS.getScopeRep(), |
Douglas Gregor | 312eadb | 2011-04-24 05:37:28 +0000 | [diff] [blame] | 641 | /*TemplateKeyword=*/false, |
Douglas Gregor | 3b88735 | 2011-04-27 04:48:22 +0000 | [diff] [blame] | 642 | TD); |
| 643 | else |
| 644 | Template = TemplateName(TD); |
| 645 | } |
Douglas Gregor | 312eadb | 2011-04-24 05:37:28 +0000 | [diff] [blame] | 646 | |
Douglas Gregor | 3b88735 | 2011-04-27 04:48:22 +0000 | [diff] [blame] | 647 | if (IsFunctionTemplate) { |
| 648 | // Function templates always go through overload resolution, at which |
| 649 | // point we'll perform the various checks (e.g., accessibility) we need |
| 650 | // to based on which function we selected. |
| 651 | Result.suppressDiagnostics(); |
| 652 | |
| 653 | return NameClassification::FunctionTemplate(Template); |
| 654 | } |
| 655 | |
| 656 | return NameClassification::TypeTemplate(Template); |
Douglas Gregor | 312eadb | 2011-04-24 05:37:28 +0000 | [diff] [blame] | 657 | } |
Douglas Gregor | 312eadb | 2011-04-24 05:37:28 +0000 | [diff] [blame] | 658 | } |
| 659 | |
Douglas Gregor | 3b88735 | 2011-04-27 04:48:22 +0000 | [diff] [blame] | 660 | NamedDecl *FirstDecl = (*Result.begin())->getUnderlyingDecl(); |
Douglas Gregor | 312eadb | 2011-04-24 05:37:28 +0000 | [diff] [blame] | 661 | if (TypeDecl *Type = dyn_cast<TypeDecl>(FirstDecl)) { |
| 662 | DiagnoseUseOfDecl(Type, NameLoc); |
| 663 | QualType T = Context.getTypeDeclType(Type); |
| 664 | return ParsedType::make(T); |
| 665 | } |
| 666 | |
| 667 | ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(FirstDecl); |
| 668 | if (!Class) { |
| 669 | // FIXME: It's unfortunate that we don't have a Type node for handling this. |
| 670 | if (ObjCCompatibleAliasDecl *Alias |
| 671 | = dyn_cast<ObjCCompatibleAliasDecl>(FirstDecl)) |
| 672 | Class = Alias->getClassInterface(); |
| 673 | } |
| 674 | |
| 675 | if (Class) { |
| 676 | DiagnoseUseOfDecl(Class, NameLoc); |
| 677 | |
| 678 | if (NextToken.is(tok::period)) { |
| 679 | // Interface. <something> is parsed as a property reference expression. |
| 680 | // Just return "unknown" as a fall-through for now. |
| 681 | Result.suppressDiagnostics(); |
| 682 | return NameClassification::Unknown(); |
| 683 | } |
| 684 | |
| 685 | QualType T = Context.getObjCInterfaceType(Class); |
| 686 | return ParsedType::make(T); |
| 687 | } |
| 688 | |
Douglas Gregor | 3b88735 | 2011-04-27 04:48:22 +0000 | [diff] [blame] | 689 | if (!Result.empty() && (*Result.begin())->isCXXClassMember()) |
| 690 | return BuildPossibleImplicitMemberExpr(SS, Result, 0); |
| 691 | |
Douglas Gregor | 312eadb | 2011-04-24 05:37:28 +0000 | [diff] [blame] | 692 | bool ADL = UseArgumentDependentLookup(SS, Result, NextToken.is(tok::l_paren)); |
| 693 | return BuildDeclarationNameExpr(SS, Result, ADL); |
| 694 | } |
| 695 | |
John McCall | 88232aa | 2009-08-18 00:00:49 +0000 | [diff] [blame] | 696 | // Determines the context to return to after temporarily entering a |
| 697 | // context. This depends in an unnecessarily complicated way on the |
| 698 | // exact ordering of callbacks from the parser. |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 699 | DeclContext *Sema::getContainingDC(DeclContext *DC) { |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 700 | |
John McCall | 88232aa | 2009-08-18 00:00:49 +0000 | [diff] [blame] | 701 | // Functions defined inline within classes aren't parsed until we've |
| 702 | // finished parsing the top-level class, so the top-level class is |
| 703 | // the context we'll need to return to. |
| 704 | if (isa<FunctionDecl>(DC)) { |
| 705 | DC = DC->getLexicalParent(); |
| 706 | |
| 707 | // A function not defined within a class will always return to its |
| 708 | // lexical context. |
| 709 | if (!isa<CXXRecordDecl>(DC)) |
| 710 | return DC; |
| 711 | |
| 712 | // A C++ inline method/friend is parsed *after* the topmost class |
| 713 | // it was declared in is fully parsed ("complete"); the topmost |
| 714 | // class is the context we need to return to. |
Argyrios Kyrtzidis | 77407b8 | 2008-11-19 18:01:13 +0000 | [diff] [blame] | 715 | while (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(DC->getLexicalParent())) |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 716 | DC = RD; |
| 717 | |
| 718 | // Return the declaration context of the topmost class the inline method is |
| 719 | // declared in. |
| 720 | return DC; |
| 721 | } |
| 722 | |
John McCall | 9983d2d | 2010-08-06 00:46:05 +0000 | [diff] [blame] | 723 | // ObjCMethodDecls are parsed (for some reason) outside the context |
| 724 | // of the class. |
Argyrios Kyrtzidis | 5239304 | 2008-11-09 23:41:00 +0000 | [diff] [blame] | 725 | if (isa<ObjCMethodDecl>(DC)) |
John McCall | 9983d2d | 2010-08-06 00:46:05 +0000 | [diff] [blame] | 726 | return DC->getLexicalParent()->getLexicalParent(); |
Argyrios Kyrtzidis | 5239304 | 2008-11-09 23:41:00 +0000 | [diff] [blame] | 727 | |
Argyrios Kyrtzidis | 77407b8 | 2008-11-19 18:01:13 +0000 | [diff] [blame] | 728 | return DC->getLexicalParent(); |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 729 | } |
| 730 | |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 731 | void Sema::PushDeclContext(Scope *S, DeclContext *DC) { |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 732 | assert(getContainingDC(DC) == CurContext && |
Zhongxing Xu | e50897a | 2008-12-08 07:14:51 +0000 | [diff] [blame] | 733 | "The next DeclContext should be lexically contained in the current one."); |
Chris Lattner | 9fdf9c6 | 2008-04-22 18:39:57 +0000 | [diff] [blame] | 734 | CurContext = DC; |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 735 | S->setEntity(DC); |
Chris Lattner | 0ed844b | 2008-04-04 06:12:32 +0000 | [diff] [blame] | 736 | } |
| 737 | |
Chris Lattner | b048c98 | 2008-04-06 04:47:34 +0000 | [diff] [blame] | 738 | void Sema::PopDeclContext() { |
| 739 | assert(CurContext && "DeclContext imbalance!"); |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 740 | |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 741 | CurContext = getContainingDC(CurContext); |
John McCall | acb7039 | 2010-07-23 22:45:07 +0000 | [diff] [blame] | 742 | assert(CurContext && "Popped translation unit!"); |
Chris Lattner | 0ed844b | 2008-04-04 06:12:32 +0000 | [diff] [blame] | 743 | } |
| 744 | |
Argyrios Kyrtzidis | 179fe1a | 2009-06-17 23:19:02 +0000 | [diff] [blame] | 745 | /// EnterDeclaratorContext - Used when we must lookup names in the context |
| 746 | /// of a declarator's nested name specifier. |
John McCall | 7a1dc56 | 2009-12-19 10:49:29 +0000 | [diff] [blame] | 747 | /// |
Argyrios Kyrtzidis | 1d17553 | 2009-06-17 23:15:40 +0000 | [diff] [blame] | 748 | void Sema::EnterDeclaratorContext(Scope *S, DeclContext *DC) { |
John McCall | 7a1dc56 | 2009-12-19 10:49:29 +0000 | [diff] [blame] | 749 | // C++0x [basic.lookup.unqual]p13: |
| 750 | // A name used in the definition of a static data member of class |
| 751 | // X (after the qualified-id of the static member) is looked up as |
| 752 | // if the name was used in a member function of X. |
| 753 | // C++0x [basic.lookup.unqual]p14: |
| 754 | // If a variable member of a namespace is defined outside of the |
| 755 | // scope of its namespace then any name used in the definition of |
| 756 | // the variable member (after the declarator-id) is looked up as |
| 757 | // if the definition of the variable member occurred in its |
| 758 | // namespace. |
| 759 | // Both of these imply that we should push a scope whose context |
| 760 | // is the semantic context of the declaration. We can't use |
| 761 | // PushDeclContext here because that context is not necessarily |
| 762 | // lexically contained in the current context. Fortunately, |
| 763 | // the containing scope should have the appropriate information. |
| 764 | |
| 765 | assert(!S->getEntity() && "scope already has entity"); |
| 766 | |
| 767 | #ifndef NDEBUG |
| 768 | Scope *Ancestor = S->getParent(); |
| 769 | while (!Ancestor->getEntity()) Ancestor = Ancestor->getParent(); |
| 770 | assert(Ancestor->getEntity() == CurContext && "ancestor context mismatch"); |
| 771 | #endif |
| 772 | |
Argyrios Kyrtzidis | 1d17553 | 2009-06-17 23:15:40 +0000 | [diff] [blame] | 773 | CurContext = DC; |
John McCall | 7a1dc56 | 2009-12-19 10:49:29 +0000 | [diff] [blame] | 774 | S->setEntity(DC); |
Argyrios Kyrtzidis | 1d17553 | 2009-06-17 23:15:40 +0000 | [diff] [blame] | 775 | } |
| 776 | |
Argyrios Kyrtzidis | 1d17553 | 2009-06-17 23:15:40 +0000 | [diff] [blame] | 777 | void Sema::ExitDeclaratorContext(Scope *S) { |
John McCall | 7a1dc56 | 2009-12-19 10:49:29 +0000 | [diff] [blame] | 778 | assert(S->getEntity() == CurContext && "Context imbalance!"); |
Argyrios Kyrtzidis | 1d17553 | 2009-06-17 23:15:40 +0000 | [diff] [blame] | 779 | |
John McCall | 7a1dc56 | 2009-12-19 10:49:29 +0000 | [diff] [blame] | 780 | // Switch back to the lexical context. The safety of this is |
| 781 | // enforced by an assert in EnterDeclaratorContext. |
| 782 | Scope *Ancestor = S->getParent(); |
| 783 | while (!Ancestor->getEntity()) Ancestor = Ancestor->getParent(); |
| 784 | CurContext = (DeclContext*) Ancestor->getEntity(); |
| 785 | |
| 786 | // We don't need to do anything with the scope, which is going to |
| 787 | // disappear. |
Argyrios Kyrtzidis | 1d17553 | 2009-06-17 23:15:40 +0000 | [diff] [blame] | 788 | } |
| 789 | |
Douglas Gregor | f9201e0 | 2009-02-11 23:02:49 +0000 | [diff] [blame] | 790 | /// \brief Determine whether we allow overloading of the function |
| 791 | /// PrevDecl with another declaration. |
| 792 | /// |
| 793 | /// This routine determines whether overloading is possible, not |
| 794 | /// whether some new function is actually an overload. It will return |
| 795 | /// true in C++ (where we can always provide overloads) or, as an |
| 796 | /// extension, in C when the previous function is already an |
| 797 | /// overloaded function declaration or has the "overloadable" |
| 798 | /// attribute. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 799 | static bool AllowOverloadingOfFunction(LookupResult &Previous, |
| 800 | ASTContext &Context) { |
Douglas Gregor | f9201e0 | 2009-02-11 23:02:49 +0000 | [diff] [blame] | 801 | if (Context.getLangOptions().CPlusPlus) |
| 802 | return true; |
| 803 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 804 | if (Previous.getResultKind() == LookupResult::FoundOverloaded) |
Douglas Gregor | f9201e0 | 2009-02-11 23:02:49 +0000 | [diff] [blame] | 805 | return true; |
| 806 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 807 | return (Previous.getResultKind() == LookupResult::Found |
| 808 | && Previous.getFoundDecl()->hasAttr<OverloadableAttr>()); |
Douglas Gregor | f9201e0 | 2009-02-11 23:02:49 +0000 | [diff] [blame] | 809 | } |
| 810 | |
Argyrios Kyrtzidis | 87f3ff0 | 2008-04-12 00:47:19 +0000 | [diff] [blame] | 811 | /// Add this decl to the scope shadowed decl chains. |
John McCall | ab88d97 | 2009-08-31 22:39:49 +0000 | [diff] [blame] | 812 | void Sema::PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext) { |
Douglas Gregor | 074149e | 2009-01-05 19:45:36 +0000 | [diff] [blame] | 813 | // Move up the scope chain until we find the nearest enclosing |
| 814 | // non-transparent context. The declaration will be introduced into this |
| 815 | // scope. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 816 | while (S->getEntity() && |
Douglas Gregor | 074149e | 2009-01-05 19:45:36 +0000 | [diff] [blame] | 817 | ((DeclContext *)S->getEntity())->isTransparentContext()) |
| 818 | S = S->getParent(); |
| 819 | |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 820 | // Add scoped declarations into their context, so that they can be |
| 821 | // found later. Declarations without a context won't be inserted |
| 822 | // into any context. |
John McCall | ab88d97 | 2009-08-31 22:39:49 +0000 | [diff] [blame] | 823 | if (AddToContext) |
| 824 | CurContext->addDecl(D); |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 825 | |
Chandler Carruth | 8761d68 | 2010-02-21 07:08:09 +0000 | [diff] [blame] | 826 | // Out-of-line definitions shouldn't be pushed into scope in C++. |
| 827 | // Out-of-line variable and function definitions shouldn't even in C. |
| 828 | if ((getLangOptions().CPlusPlus || isa<VarDecl>(D) || isa<FunctionDecl>(D)) && |
| 829 | D->isOutOfLine()) |
| 830 | return; |
| 831 | |
| 832 | // Template instantiations should also not be pushed into scope. |
| 833 | if (isa<FunctionDecl>(D) && |
| 834 | cast<FunctionDecl>(D)->isFunctionTemplateSpecialization()) |
Douglas Gregor | d04b1be | 2009-09-28 18:41:37 +0000 | [diff] [blame] | 835 | return; |
| 836 | |
John McCall | f36e02d | 2009-10-09 21:13:30 +0000 | [diff] [blame] | 837 | // If this replaces anything in the current scope, |
| 838 | IdentifierResolver::iterator I = IdResolver.begin(D->getDeclName()), |
| 839 | IEnd = IdResolver.end(); |
| 840 | for (; I != IEnd; ++I) { |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 841 | if (S->isDeclScope(*I) && D->declarationReplaces(*I)) { |
| 842 | S->RemoveDecl(*I); |
John McCall | f36e02d | 2009-10-09 21:13:30 +0000 | [diff] [blame] | 843 | IdResolver.RemoveDecl(*I); |
Argyrios Kyrtzidis | 00bc645 | 2008-05-09 23:39:43 +0000 | [diff] [blame] | 844 | |
John McCall | f36e02d | 2009-10-09 21:13:30 +0000 | [diff] [blame] | 845 | // Should only need to replace one decl. |
| 846 | break; |
Douglas Gregor | 516ff43 | 2009-04-24 02:57:34 +0000 | [diff] [blame] | 847 | } |
Argyrios Kyrtzidis | 00bc645 | 2008-05-09 23:39:43 +0000 | [diff] [blame] | 848 | } |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 849 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 850 | S->AddDecl(D); |
Douglas Gregor | 7cbc558 | 2011-03-14 21:19:51 +0000 | [diff] [blame] | 851 | |
| 852 | if (isa<LabelDecl>(D) && !cast<LabelDecl>(D)->isGnuLocal()) { |
| 853 | // Implicitly-generated labels may end up getting generated in an order that |
| 854 | // isn't strictly lexical, which breaks name lookup. Be careful to insert |
| 855 | // the label at the appropriate place in the identifier chain. |
| 856 | for (I = IdResolver.begin(D->getDeclName()); I != IEnd; ++I) { |
Douglas Gregor | 1d2de76 | 2011-03-24 14:35:16 +0000 | [diff] [blame] | 857 | DeclContext *IDC = (*I)->getLexicalDeclContext()->getRedeclContext(); |
Douglas Gregor | 250e7a7 | 2011-03-16 16:39:03 +0000 | [diff] [blame] | 858 | if (IDC == CurContext) { |
| 859 | if (!S->isDeclScope(*I)) |
| 860 | continue; |
| 861 | } else if (IDC->Encloses(CurContext)) |
Douglas Gregor | 7cbc558 | 2011-03-14 21:19:51 +0000 | [diff] [blame] | 862 | break; |
| 863 | } |
| 864 | |
Douglas Gregor | 250e7a7 | 2011-03-16 16:39:03 +0000 | [diff] [blame] | 865 | IdResolver.InsertDeclAfter(I, D); |
Douglas Gregor | 7cbc558 | 2011-03-14 21:19:51 +0000 | [diff] [blame] | 866 | } else { |
| 867 | IdResolver.AddDecl(D); |
| 868 | } |
Argyrios Kyrtzidis | 87f3ff0 | 2008-04-12 00:47:19 +0000 | [diff] [blame] | 869 | } |
| 870 | |
Douglas Gregor | cc20945 | 2011-03-07 16:54:27 +0000 | [diff] [blame] | 871 | bool Sema::isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S, |
| 872 | bool ExplicitInstantiationOrSpecialization) { |
| 873 | return IdResolver.isDeclInScope(D, Ctx, Context, S, |
| 874 | ExplicitInstantiationOrSpecialization); |
Douglas Gregor | 2531c2d | 2009-09-28 00:47:05 +0000 | [diff] [blame] | 875 | } |
| 876 | |
John McCall | 5f1e094 | 2010-08-24 08:50:51 +0000 | [diff] [blame] | 877 | Scope *Sema::getScopeForDeclContext(Scope *S, DeclContext *DC) { |
| 878 | DeclContext *TargetDC = DC->getPrimaryContext(); |
| 879 | do { |
| 880 | if (DeclContext *ScopeDC = (DeclContext*) S->getEntity()) |
| 881 | if (ScopeDC->getPrimaryContext() == TargetDC) |
| 882 | return S; |
| 883 | } while ((S = S->getParent())); |
| 884 | |
| 885 | return 0; |
| 886 | } |
| 887 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 888 | static bool isOutOfScopePreviousDeclaration(NamedDecl *, |
| 889 | DeclContext*, |
| 890 | ASTContext&); |
| 891 | |
| 892 | /// Filters out lookup results that don't fall within the given scope |
| 893 | /// as determined by isDeclInScope. |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 894 | void Sema::FilterLookupForScope(LookupResult &R, |
| 895 | DeclContext *Ctx, Scope *S, |
| 896 | bool ConsiderLinkage, |
| 897 | bool ExplicitInstantiationOrSpecialization) { |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 898 | LookupResult::Filter F = R.makeFilter(); |
| 899 | while (F.hasNext()) { |
| 900 | NamedDecl *D = F.next(); |
| 901 | |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 902 | if (isDeclInScope(D, Ctx, S, ExplicitInstantiationOrSpecialization)) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 903 | continue; |
| 904 | |
| 905 | if (ConsiderLinkage && |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 906 | isOutOfScopePreviousDeclaration(D, Ctx, Context)) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 907 | continue; |
| 908 | |
| 909 | F.erase(); |
| 910 | } |
| 911 | |
| 912 | F.done(); |
| 913 | } |
| 914 | |
| 915 | static bool isUsingDecl(NamedDecl *D) { |
| 916 | return isa<UsingShadowDecl>(D) || |
| 917 | isa<UnresolvedUsingTypenameDecl>(D) || |
| 918 | isa<UnresolvedUsingValueDecl>(D); |
| 919 | } |
| 920 | |
| 921 | /// Removes using shadow declarations from the lookup results. |
| 922 | static void RemoveUsingDecls(LookupResult &R) { |
| 923 | LookupResult::Filter F = R.makeFilter(); |
| 924 | while (F.hasNext()) |
| 925 | if (isUsingDecl(F.next())) |
| 926 | F.erase(); |
| 927 | |
| 928 | F.done(); |
| 929 | } |
| 930 | |
Argyrios Kyrtzidis | 06999f8 | 2010-08-15 10:17:33 +0000 | [diff] [blame] | 931 | /// \brief Check for this common pattern: |
| 932 | /// @code |
| 933 | /// class S { |
| 934 | /// S(const S&); // DO NOT IMPLEMENT |
| 935 | /// void operator=(const S&); // DO NOT IMPLEMENT |
| 936 | /// }; |
| 937 | /// @endcode |
| 938 | static bool IsDisallowedCopyOrAssign(const CXXMethodDecl *D) { |
| 939 | // FIXME: Should check for private access too but access is set after we get |
| 940 | // the decl here. |
Sean Hunt | 10620eb | 2011-05-06 20:44:56 +0000 | [diff] [blame^] | 941 | if (D->doesThisDeclarationHaveABody()) |
Argyrios Kyrtzidis | 06999f8 | 2010-08-15 10:17:33 +0000 | [diff] [blame] | 942 | return false; |
| 943 | |
| 944 | if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) |
| 945 | return CD->isCopyConstructor(); |
Douglas Gregor | 27c08ab | 2010-09-27 22:06:20 +0000 | [diff] [blame] | 946 | if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) |
| 947 | return Method->isCopyAssignmentOperator(); |
| 948 | return false; |
Argyrios Kyrtzidis | 06999f8 | 2010-08-15 10:17:33 +0000 | [diff] [blame] | 949 | } |
| 950 | |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 951 | bool Sema::ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const { |
| 952 | assert(D); |
Argyrios Kyrtzidis | f6d1d43 | 2010-08-13 18:42:29 +0000 | [diff] [blame] | 953 | |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 954 | if (D->isInvalidDecl() || D->isUsed() || D->hasAttr<UnusedAttr>()) |
| 955 | return false; |
| 956 | |
| 957 | // Ignore class templates. |
Chandler Carruth | ef9d09c | 2011-01-03 19:27:19 +0000 | [diff] [blame] | 958 | if (D->getDeclContext()->isDependentContext() || |
| 959 | D->getLexicalDeclContext()->isDependentContext()) |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 960 | return false; |
| 961 | |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 962 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { |
Argyrios Kyrtzidis | 06999f8 | 2010-08-15 10:17:33 +0000 | [diff] [blame] | 963 | if (FD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation) |
| 964 | return false; |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 965 | |
Argyrios Kyrtzidis | 06999f8 | 2010-08-15 10:17:33 +0000 | [diff] [blame] | 966 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { |
| 967 | if (MD->isVirtual() || IsDisallowedCopyOrAssign(MD)) |
| 968 | return false; |
| 969 | } else { |
| 970 | // 'static inline' functions are used in headers; don't warn. |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 971 | if (FD->getStorageClass() == SC_Static && |
Argyrios Kyrtzidis | 06999f8 | 2010-08-15 10:17:33 +0000 | [diff] [blame] | 972 | FD->isInlineSpecified()) |
| 973 | return false; |
| 974 | } |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 975 | |
Sean Hunt | 10620eb | 2011-05-06 20:44:56 +0000 | [diff] [blame^] | 976 | if (FD->doesThisDeclarationHaveABody() && |
John McCall | 82b9659 | 2010-10-27 01:41:35 +0000 | [diff] [blame] | 977 | Context.DeclMustBeEmitted(FD)) |
| 978 | return false; |
John McCall | 82b9659 | 2010-10-27 01:41:35 +0000 | [diff] [blame] | 979 | } else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { |
| 980 | if (!VD->isFileVarDecl() || |
| 981 | VD->getType().isConstant(Context) || |
| 982 | Context.DeclMustBeEmitted(VD)) |
| 983 | return false; |
| 984 | |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 985 | if (VD->isStaticDataMember() && |
| 986 | VD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation) |
| 987 | return false; |
| 988 | |
John McCall | 82b9659 | 2010-10-27 01:41:35 +0000 | [diff] [blame] | 989 | } else { |
| 990 | return false; |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 991 | } |
| 992 | |
John McCall | 82b9659 | 2010-10-27 01:41:35 +0000 | [diff] [blame] | 993 | // Only warn for unused decls internal to the translation unit. |
| 994 | if (D->getLinkage() == ExternalLinkage) |
| 995 | return false; |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 996 | |
John McCall | 82b9659 | 2010-10-27 01:41:35 +0000 | [diff] [blame] | 997 | return true; |
| 998 | } |
| 999 | |
| 1000 | void Sema::MarkUnusedFileScopedDecl(const DeclaratorDecl *D) { |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 1001 | if (!D) |
| 1002 | return; |
| 1003 | |
| 1004 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { |
| 1005 | const FunctionDecl *First = FD->getFirstDeclaration(); |
| 1006 | if (FD != First && ShouldWarnIfUnusedFileScopedDecl(First)) |
| 1007 | return; // First should already be in the vector. |
| 1008 | } |
| 1009 | |
| 1010 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { |
| 1011 | const VarDecl *First = VD->getFirstDeclaration(); |
| 1012 | if (VD != First && ShouldWarnIfUnusedFileScopedDecl(First)) |
| 1013 | return; // First should already be in the vector. |
| 1014 | } |
| 1015 | |
| 1016 | if (ShouldWarnIfUnusedFileScopedDecl(D)) |
| 1017 | UnusedFileScopedDecls.push_back(D); |
| 1018 | } |
Argyrios Kyrtzidis | 49b96d1 | 2010-08-13 18:42:17 +0000 | [diff] [blame] | 1019 | |
Anders Carlsson | 99a000e | 2009-11-07 07:18:14 +0000 | [diff] [blame] | 1020 | static bool ShouldDiagnoseUnusedDecl(const NamedDecl *D) { |
John McCall | 86ff308 | 2010-02-04 22:26:26 +0000 | [diff] [blame] | 1021 | if (D->isInvalidDecl()) |
| 1022 | return false; |
| 1023 | |
Anders Carlsson | f7613d5 | 2009-11-07 07:26:56 +0000 | [diff] [blame] | 1024 | if (D->isUsed() || D->hasAttr<UnusedAttr>()) |
| 1025 | return false; |
John McCall | 86ff308 | 2010-02-04 22:26:26 +0000 | [diff] [blame] | 1026 | |
Chris Lattner | 57ad378 | 2011-02-17 20:34:02 +0000 | [diff] [blame] | 1027 | if (isa<LabelDecl>(D)) |
| 1028 | return true; |
| 1029 | |
John McCall | 86ff308 | 2010-02-04 22:26:26 +0000 | [diff] [blame] | 1030 | // White-list anything that isn't a local variable. |
| 1031 | if (!isa<VarDecl>(D) || isa<ParmVarDecl>(D) || isa<ImplicitParamDecl>(D) || |
| 1032 | !D->getDeclContext()->isFunctionOrMethod()) |
| 1033 | return false; |
| 1034 | |
| 1035 | // Types of valid local variables should be complete, so this should succeed. |
Anders Carlsson | f7613d5 | 2009-11-07 07:26:56 +0000 | [diff] [blame] | 1036 | if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { |
John McCall | aec5860 | 2010-03-31 02:47:45 +0000 | [diff] [blame] | 1037 | |
| 1038 | // White-list anything with an __attribute__((unused)) type. |
| 1039 | QualType Ty = VD->getType(); |
| 1040 | |
| 1041 | // Only look at the outermost level of typedef. |
| 1042 | if (const TypedefType *TT = dyn_cast<TypedefType>(Ty)) { |
| 1043 | if (TT->getDecl()->hasAttr<UnusedAttr>()) |
| 1044 | return false; |
| 1045 | } |
| 1046 | |
Douglas Gregor | 5764f61 | 2010-05-08 23:05:03 +0000 | [diff] [blame] | 1047 | // If we failed to complete the type for some reason, or if the type is |
| 1048 | // dependent, don't diagnose the variable. |
| 1049 | if (Ty->isIncompleteType() || Ty->isDependentType()) |
Douglas Gregor | a6a292b | 2010-04-27 16:20:13 +0000 | [diff] [blame] | 1050 | return false; |
| 1051 | |
John McCall | aec5860 | 2010-03-31 02:47:45 +0000 | [diff] [blame] | 1052 | if (const TagType *TT = Ty->getAs<TagType>()) { |
| 1053 | const TagDecl *Tag = TT->getDecl(); |
| 1054 | if (Tag->hasAttr<UnusedAttr>()) |
| 1055 | return false; |
| 1056 | |
| 1057 | if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(Tag)) { |
Douglas Gregor | 5764f61 | 2010-05-08 23:05:03 +0000 | [diff] [blame] | 1058 | // FIXME: Checking for the presence of a user-declared constructor |
| 1059 | // isn't completely accurate; we'd prefer to check that the initializer |
| 1060 | // has no side effects. |
| 1061 | if (RD->hasUserDeclaredConstructor() || !RD->hasTrivialDestructor()) |
Anders Carlsson | f7613d5 | 2009-11-07 07:26:56 +0000 | [diff] [blame] | 1062 | return false; |
| 1063 | } |
| 1064 | } |
John McCall | aec5860 | 2010-03-31 02:47:45 +0000 | [diff] [blame] | 1065 | |
| 1066 | // TODO: __attribute__((unused)) templates? |
Anders Carlsson | f7613d5 | 2009-11-07 07:26:56 +0000 | [diff] [blame] | 1067 | } |
| 1068 | |
John McCall | 86ff308 | 2010-02-04 22:26:26 +0000 | [diff] [blame] | 1069 | return true; |
Anders Carlsson | 99a000e | 2009-11-07 07:18:14 +0000 | [diff] [blame] | 1070 | } |
| 1071 | |
Chris Lattner | 337e550 | 2011-02-18 01:27:55 +0000 | [diff] [blame] | 1072 | /// DiagnoseUnusedDecl - Emit warnings about declarations that are not used |
| 1073 | /// unless they are marked attr(unused). |
Douglas Gregor | 5764f61 | 2010-05-08 23:05:03 +0000 | [diff] [blame] | 1074 | void Sema::DiagnoseUnusedDecl(const NamedDecl *D) { |
| 1075 | if (!ShouldDiagnoseUnusedDecl(D)) |
| 1076 | return; |
| 1077 | |
Chris Lattner | 57ad378 | 2011-02-17 20:34:02 +0000 | [diff] [blame] | 1078 | unsigned DiagID; |
Douglas Gregor | 5764f61 | 2010-05-08 23:05:03 +0000 | [diff] [blame] | 1079 | if (isa<VarDecl>(D) && cast<VarDecl>(D)->isExceptionVariable()) |
Chris Lattner | 57ad378 | 2011-02-17 20:34:02 +0000 | [diff] [blame] | 1080 | DiagID = diag::warn_unused_exception_param; |
| 1081 | else if (isa<LabelDecl>(D)) |
| 1082 | DiagID = diag::warn_unused_label; |
Douglas Gregor | 5764f61 | 2010-05-08 23:05:03 +0000 | [diff] [blame] | 1083 | else |
Chris Lattner | 57ad378 | 2011-02-17 20:34:02 +0000 | [diff] [blame] | 1084 | DiagID = diag::warn_unused_variable; |
| 1085 | |
| 1086 | Diag(D->getLocation(), DiagID) << D->getDeclName(); |
Douglas Gregor | 5764f61 | 2010-05-08 23:05:03 +0000 | [diff] [blame] | 1087 | } |
| 1088 | |
Chris Lattner | 337e550 | 2011-02-18 01:27:55 +0000 | [diff] [blame] | 1089 | static void CheckPoppedLabel(LabelDecl *L, Sema &S) { |
| 1090 | // Verify that we have no forward references left. If so, there was a goto |
| 1091 | // or address of a label taken, but no definition of it. Label fwd |
| 1092 | // definitions are indicated with a null substmt. |
| 1093 | if (L->getStmt() == 0) |
| 1094 | S.Diag(L->getLocation(), diag::err_undeclared_label_use) <<L->getDeclName(); |
| 1095 | } |
| 1096 | |
Steve Naroff | b216c88 | 2007-10-09 22:01:59 +0000 | [diff] [blame] | 1097 | void Sema::ActOnPopScope(SourceLocation Loc, Scope *S) { |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 1098 | if (S->decl_empty()) return; |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 1099 | assert((S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope)) && |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1100 | "Scope shouldn't contain decls!"); |
Argyrios Kyrtzidis | 00bc645 | 2008-05-09 23:39:43 +0000 | [diff] [blame] | 1101 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1102 | for (Scope::decl_iterator I = S->decl_begin(), E = S->decl_end(); |
| 1103 | I != E; ++I) { |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 1104 | Decl *TmpD = (*I); |
Steve Naroff | c752d04 | 2007-09-13 18:10:37 +0000 | [diff] [blame] | 1105 | assert(TmpD && "This decl didn't get pushed??"); |
Argyrios Kyrtzidis | 7643536 | 2008-06-10 01:32:09 +0000 | [diff] [blame] | 1106 | |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 1107 | assert(isa<NamedDecl>(TmpD) && "Decl isn't NamedDecl?"); |
| 1108 | NamedDecl *D = cast<NamedDecl>(TmpD); |
Argyrios Kyrtzidis | 7643536 | 2008-06-10 01:32:09 +0000 | [diff] [blame] | 1109 | |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 1110 | if (!D->getDeclName()) continue; |
Chris Lattner | 7f925cc | 2008-04-11 07:00:53 +0000 | [diff] [blame] | 1111 | |
Douglas Gregor | b5352cf | 2009-10-08 21:35:42 +0000 | [diff] [blame] | 1112 | // Diagnose unused variables in this scope. |
Argyrios Kyrtzidis | 9c4eb1f | 2010-11-19 00:19:12 +0000 | [diff] [blame] | 1113 | if (!S->hasErrorOccurred()) |
Douglas Gregor | 5764f61 | 2010-05-08 23:05:03 +0000 | [diff] [blame] | 1114 | DiagnoseUnusedDecl(D); |
| 1115 | |
Chris Lattner | 337e550 | 2011-02-18 01:27:55 +0000 | [diff] [blame] | 1116 | // If this was a forward reference to a label, verify it was defined. |
| 1117 | if (LabelDecl *LD = dyn_cast<LabelDecl>(D)) |
| 1118 | CheckPoppedLabel(LD, *this); |
| 1119 | |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 1120 | // Remove this name from our lexical scope. |
| 1121 | IdResolver.RemoveDecl(D); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1122 | } |
| 1123 | } |
| 1124 | |
Douglas Gregor | deacbdc | 2010-08-11 12:19:30 +0000 | [diff] [blame] | 1125 | /// \brief Look for an Objective-C class in the translation unit. |
| 1126 | /// |
| 1127 | /// \param Id The name of the Objective-C class we're looking for. If |
| 1128 | /// typo-correction fixes this name, the Id will be updated |
| 1129 | /// to the fixed name. |
| 1130 | /// |
| 1131 | /// \param IdLoc The location of the name in the translation unit. |
| 1132 | /// |
| 1133 | /// \param TypoCorrection If true, this routine will attempt typo correction |
| 1134 | /// if there is no class with the given name. |
| 1135 | /// |
| 1136 | /// \returns The declaration of the named Objective-C class, or NULL if the |
| 1137 | /// class could not be found. |
| 1138 | ObjCInterfaceDecl *Sema::getObjCInterfaceDecl(IdentifierInfo *&Id, |
| 1139 | SourceLocation IdLoc, |
| 1140 | bool TypoCorrection) { |
| 1141 | // The third "scope" argument is 0 since we aren't enabling lazy built-in |
| 1142 | // creation from this context. |
| 1143 | NamedDecl *IDecl = LookupSingleName(TUScope, Id, IdLoc, LookupOrdinaryName); |
| 1144 | |
| 1145 | if (!IDecl && TypoCorrection) { |
| 1146 | // Perform typo correction at the given location, but only if we |
| 1147 | // find an Objective-C class name. |
| 1148 | LookupResult R(*this, Id, IdLoc, LookupOrdinaryName); |
| 1149 | if (CorrectTypo(R, TUScope, 0, 0, false, CTC_NoKeywords) && |
| 1150 | (IDecl = R.getAsSingle<ObjCInterfaceDecl>())) { |
| 1151 | Diag(IdLoc, diag::err_undef_interface_suggest) |
| 1152 | << Id << IDecl->getDeclName() |
| 1153 | << FixItHint::CreateReplacement(IdLoc, IDecl->getNameAsString()); |
| 1154 | Diag(IDecl->getLocation(), diag::note_previous_decl) |
| 1155 | << IDecl->getDeclName(); |
| 1156 | |
| 1157 | Id = IDecl->getIdentifier(); |
| 1158 | } |
| 1159 | } |
| 1160 | |
| 1161 | return dyn_cast_or_null<ObjCInterfaceDecl>(IDecl); |
| 1162 | } |
| 1163 | |
Douglas Gregor | 1a0d31a | 2009-01-12 18:45:55 +0000 | [diff] [blame] | 1164 | /// getNonFieldDeclScope - Retrieves the innermost scope, starting |
| 1165 | /// from S, where a non-field would be declared. This routine copes |
| 1166 | /// with the difference between C and C++ scoping rules in structs and |
| 1167 | /// unions. For example, the following code is well-formed in C but |
| 1168 | /// ill-formed in C++: |
| 1169 | /// @code |
| 1170 | /// struct S6 { |
| 1171 | /// enum { BAR } e; |
| 1172 | /// }; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1173 | /// |
Douglas Gregor | 1a0d31a | 2009-01-12 18:45:55 +0000 | [diff] [blame] | 1174 | /// void test_S6() { |
| 1175 | /// struct S6 a; |
| 1176 | /// a.e = BAR; |
| 1177 | /// } |
| 1178 | /// @endcode |
| 1179 | /// For the declaration of BAR, this routine will return a different |
| 1180 | /// scope. The scope S will be the scope of the unnamed enumeration |
| 1181 | /// within S6. In C++, this routine will return the scope associated |
| 1182 | /// with S6, because the enumeration's scope is a transparent |
| 1183 | /// context but structures can contain non-field names. In C, this |
| 1184 | /// routine will return the translation unit scope, since the |
| 1185 | /// enumeration's scope is a transparent context and structures cannot |
| 1186 | /// contain non-field names. |
| 1187 | Scope *Sema::getNonFieldDeclScope(Scope *S) { |
| 1188 | while (((S->getFlags() & Scope::DeclScope) == 0) || |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1189 | (S->getEntity() && |
Douglas Gregor | 1a0d31a | 2009-01-12 18:45:55 +0000 | [diff] [blame] | 1190 | ((DeclContext *)S->getEntity())->isTransparentContext()) || |
| 1191 | (S->isClassScope() && !getLangOptions().CPlusPlus)) |
| 1192 | S = S->getParent(); |
| 1193 | return S; |
| 1194 | } |
| 1195 | |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1196 | /// LazilyCreateBuiltin - The specified Builtin-ID was first used at |
| 1197 | /// file scope. lazily create a decl for it. ForRedeclaration is true |
| 1198 | /// if we're creating this built-in in anticipation of redeclaring the |
| 1199 | /// built-in. |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 1200 | NamedDecl *Sema::LazilyCreateBuiltin(IdentifierInfo *II, unsigned bid, |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1201 | Scope *S, bool ForRedeclaration, |
| 1202 | SourceLocation Loc) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1203 | Builtin::ID BID = (Builtin::ID)bid; |
| 1204 | |
Chris Lattner | 86df27b | 2009-06-14 00:45:47 +0000 | [diff] [blame] | 1205 | ASTContext::GetBuiltinTypeError Error; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1206 | QualType R = Context.GetBuiltinType(BID, Error); |
Douglas Gregor | 370ab3f | 2009-02-14 01:52:53 +0000 | [diff] [blame] | 1207 | switch (Error) { |
Chris Lattner | 86df27b | 2009-06-14 00:45:47 +0000 | [diff] [blame] | 1208 | case ASTContext::GE_None: |
Douglas Gregor | 370ab3f | 2009-02-14 01:52:53 +0000 | [diff] [blame] | 1209 | // Okay |
| 1210 | break; |
| 1211 | |
Mike Stump | f711c41 | 2009-07-28 23:57:15 +0000 | [diff] [blame] | 1212 | case ASTContext::GE_Missing_stdio: |
Douglas Gregor | 370ab3f | 2009-02-14 01:52:53 +0000 | [diff] [blame] | 1213 | if (ForRedeclaration) |
Douglas Gregor | 6b9109e | 2011-01-03 09:37:44 +0000 | [diff] [blame] | 1214 | Diag(Loc, diag::warn_implicit_decl_requires_stdio) |
Douglas Gregor | 370ab3f | 2009-02-14 01:52:53 +0000 | [diff] [blame] | 1215 | << Context.BuiltinInfo.GetName(BID); |
| 1216 | return 0; |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 1217 | |
Mike Stump | f711c41 | 2009-07-28 23:57:15 +0000 | [diff] [blame] | 1218 | case ASTContext::GE_Missing_setjmp: |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 1219 | if (ForRedeclaration) |
Douglas Gregor | 6b9109e | 2011-01-03 09:37:44 +0000 | [diff] [blame] | 1220 | Diag(Loc, diag::warn_implicit_decl_requires_setjmp) |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 1221 | << Context.BuiltinInfo.GetName(BID); |
| 1222 | return 0; |
Douglas Gregor | 370ab3f | 2009-02-14 01:52:53 +0000 | [diff] [blame] | 1223 | } |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1224 | |
| 1225 | if (!ForRedeclaration && Context.BuiltinInfo.isPredefinedLibFunction(BID)) { |
| 1226 | Diag(Loc, diag::ext_implicit_lib_function_decl) |
| 1227 | << Context.BuiltinInfo.GetName(BID) |
| 1228 | << R; |
Douglas Gregor | b1152d8 | 2009-02-16 21:58:21 +0000 | [diff] [blame] | 1229 | if (Context.BuiltinInfo.getHeaderName(BID) && |
Argyrios Kyrtzidis | 0827408 | 2010-12-15 18:44:22 +0000 | [diff] [blame] | 1230 | Diags.getDiagnosticLevel(diag::ext_implicit_lib_function_decl, Loc) |
Chris Lattner | 6a7334d | 2009-04-16 03:59:32 +0000 | [diff] [blame] | 1231 | != Diagnostic::Ignored) |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1232 | Diag(Loc, diag::note_please_include_header) |
| 1233 | << Context.BuiltinInfo.getHeaderName(BID) |
| 1234 | << Context.BuiltinInfo.GetName(BID); |
| 1235 | } |
| 1236 | |
Argyrios Kyrtzidis | ff898cd | 2008-04-17 14:47:13 +0000 | [diff] [blame] | 1237 | FunctionDecl *New = FunctionDecl::Create(Context, |
| 1238 | Context.getTranslationUnitDecl(), |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 1239 | Loc, Loc, II, R, /*TInfo=*/0, |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 1240 | SC_Extern, |
| 1241 | SC_None, false, |
Douglas Gregor | 2224f84 | 2009-02-25 16:33:18 +0000 | [diff] [blame] | 1242 | /*hasPrototype=*/true); |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1243 | New->setImplicit(); |
| 1244 | |
Chris Lattner | 95e2c71 | 2008-05-05 22:18:14 +0000 | [diff] [blame] | 1245 | // Create Decl objects for each parameter, adding them to the |
| 1246 | // FunctionDecl. |
John McCall | f4c7371 | 2011-01-19 06:33:43 +0000 | [diff] [blame] | 1247 | if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(R)) { |
Chris Lattner | 95e2c71 | 2008-05-05 22:18:14 +0000 | [diff] [blame] | 1248 | llvm::SmallVector<ParmVarDecl*, 16> Params; |
John McCall | fb44de9 | 2011-05-01 22:35:37 +0000 | [diff] [blame] | 1249 | for (unsigned i = 0, e = FT->getNumArgs(); i != e; ++i) { |
| 1250 | ParmVarDecl *parm = |
| 1251 | ParmVarDecl::Create(Context, New, SourceLocation(), |
| 1252 | SourceLocation(), 0, |
| 1253 | FT->getArgType(i), /*TInfo=*/0, |
| 1254 | SC_None, SC_None, 0); |
| 1255 | parm->setScopeInfo(0, i); |
| 1256 | Params.push_back(parm); |
| 1257 | } |
Douglas Gregor | 838db38 | 2010-02-11 01:19:42 +0000 | [diff] [blame] | 1258 | New->setParams(Params.data(), Params.size()); |
Chris Lattner | 95e2c71 | 2008-05-05 22:18:14 +0000 | [diff] [blame] | 1259 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1260 | |
| 1261 | AddKnownFunctionAttributes(New); |
| 1262 | |
Chris Lattner | 7f925cc | 2008-04-11 07:00:53 +0000 | [diff] [blame] | 1263 | // TUScope is the translation-unit scope to insert this function into. |
Douglas Gregor | a8cc8ce | 2009-01-09 18:51:29 +0000 | [diff] [blame] | 1264 | // FIXME: This is hideous. We need to teach PushOnScopeChains to |
| 1265 | // relate Scopes to DeclContexts, and probably eliminate CurContext |
| 1266 | // entirely, but we're not there yet. |
| 1267 | DeclContext *SavedContext = CurContext; |
| 1268 | CurContext = Context.getTranslationUnitDecl(); |
Argyrios Kyrtzidis | 00bc645 | 2008-05-09 23:39:43 +0000 | [diff] [blame] | 1269 | PushOnScopeChains(New, TUScope); |
Douglas Gregor | a8cc8ce | 2009-01-09 18:51:29 +0000 | [diff] [blame] | 1270 | CurContext = SavedContext; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1271 | return New; |
| 1272 | } |
| 1273 | |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 1274 | /// MergeTypedefNameDecl - We just parsed a typedef 'New' which has the |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1275 | /// same name and scope as a previous declaration 'Old'. Figure out |
| 1276 | /// how to resolve this situation, merging decls or emitting |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1277 | /// diagnostics as appropriate. If there was an error, set New to be invalid. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1278 | /// |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 1279 | void Sema::MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls) { |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1280 | // If the new decl is known invalid already, don't bother doing any |
| 1281 | // merging checks. |
| 1282 | if (New->isInvalidDecl()) return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1283 | |
Steve Naroff | 2b255c4 | 2008-09-09 14:32:20 +0000 | [diff] [blame] | 1284 | // Allow multiple definitions for ObjC built-in typedefs. |
| 1285 | // FIXME: Verify the underlying types are equivalent! |
| 1286 | if (getLangOptions().ObjC1) { |
Chris Lattner | 2bac0f6 | 2008-11-20 05:41:43 +0000 | [diff] [blame] | 1287 | const IdentifierInfo *TypeID = New->getIdentifier(); |
| 1288 | switch (TypeID->getLength()) { |
| 1289 | default: break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1290 | case 2: |
Chris Lattner | 2bac0f6 | 2008-11-20 05:41:43 +0000 | [diff] [blame] | 1291 | if (!TypeID->isStr("id")) |
| 1292 | break; |
David Chisnall | 0f43656 | 2009-08-17 16:35:33 +0000 | [diff] [blame] | 1293 | Context.ObjCIdRedefinitionType = New->getUnderlyingType(); |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 1294 | // Install the built-in type for 'id', ignoring the current definition. |
| 1295 | New->setTypeForDecl(Context.getObjCIdType().getTypePtr()); |
| 1296 | return; |
Chris Lattner | 2bac0f6 | 2008-11-20 05:41:43 +0000 | [diff] [blame] | 1297 | case 5: |
| 1298 | if (!TypeID->isStr("Class")) |
| 1299 | break; |
David Chisnall | 0f43656 | 2009-08-17 16:35:33 +0000 | [diff] [blame] | 1300 | Context.ObjCClassRedefinitionType = New->getUnderlyingType(); |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 1301 | // Install the built-in type for 'Class', ignoring the current definition. |
| 1302 | New->setTypeForDecl(Context.getObjCClassType().getTypePtr()); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1303 | return; |
Chris Lattner | 2bac0f6 | 2008-11-20 05:41:43 +0000 | [diff] [blame] | 1304 | case 3: |
| 1305 | if (!TypeID->isStr("SEL")) |
| 1306 | break; |
Fariborz Jahanian | 369a3bd | 2009-11-25 23:07:42 +0000 | [diff] [blame] | 1307 | Context.ObjCSelRedefinitionType = New->getUnderlyingType(); |
Fariborz Jahanian | 13dcd00 | 2009-11-21 19:53:08 +0000 | [diff] [blame] | 1308 | // Install the built-in type for 'SEL', ignoring the current definition. |
| 1309 | New->setTypeForDecl(Context.getObjCSelType().getTypePtr()); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1310 | return; |
Chris Lattner | 2bac0f6 | 2008-11-20 05:41:43 +0000 | [diff] [blame] | 1311 | case 8: |
| 1312 | if (!TypeID->isStr("Protocol")) |
| 1313 | break; |
Steve Naroff | 2b255c4 | 2008-09-09 14:32:20 +0000 | [diff] [blame] | 1314 | Context.setObjCProtoType(New->getUnderlyingType()); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1315 | return; |
Steve Naroff | 2b255c4 | 2008-09-09 14:32:20 +0000 | [diff] [blame] | 1316 | } |
| 1317 | // Fall through - the typedef name was not a builtin type. |
| 1318 | } |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1319 | |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 1320 | // Verify the old decl was also a type. |
John McCall | 5126fd0 | 2009-12-30 00:31:22 +0000 | [diff] [blame] | 1321 | TypeDecl *Old = OldDecls.getAsSingle<TypeDecl>(); |
| 1322 | if (!Old) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1323 | Diag(New->getLocation(), diag::err_redefinition_different_kind) |
Chris Lattner | 08631c5 | 2008-11-23 21:45:46 +0000 | [diff] [blame] | 1324 | << New->getDeclName(); |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1325 | |
| 1326 | NamedDecl *OldD = OldDecls.getRepresentativeDecl(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1327 | if (OldD->getLocation().isValid()) |
Fariborz Jahanian | c55a240 | 2009-01-16 19:58:32 +0000 | [diff] [blame] | 1328 | Diag(OldD->getLocation(), diag::note_previous_definition); |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1329 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1330 | return New->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1331 | } |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 1332 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1333 | // If the old declaration is invalid, just give up here. |
| 1334 | if (Old->isInvalidDecl()) |
| 1335 | return New->setInvalidDecl(); |
| 1336 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1337 | // Determine the "old" type we'll use for checking and diagnostics. |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 1338 | QualType OldType; |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 1339 | if (TypedefNameDecl *OldTypedef = dyn_cast<TypedefNameDecl>(Old)) |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 1340 | OldType = OldTypedef->getUnderlyingType(); |
| 1341 | else |
| 1342 | OldType = Context.getTypeDeclType(Old); |
| 1343 | |
Chris Lattner | 99cb997 | 2008-07-25 18:44:27 +0000 | [diff] [blame] | 1344 | // If the typedef types are not identical, reject them in all languages and |
| 1345 | // with any extensions enabled. |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 1346 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1347 | if (OldType != New->getUnderlyingType() && |
| 1348 | Context.getCanonicalType(OldType) != |
Chris Lattner | 99cb997 | 2008-07-25 18:44:27 +0000 | [diff] [blame] | 1349 | Context.getCanonicalType(New->getUnderlyingType())) { |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 1350 | int Kind = 0; |
| 1351 | if (isa<TypeAliasDecl>(Old)) |
| 1352 | Kind = 1; |
Chris Lattner | 5dc266a | 2008-11-20 06:13:02 +0000 | [diff] [blame] | 1353 | Diag(New->getLocation(), diag::err_redefinition_different_typedef) |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 1354 | << Kind << New->getUnderlyingType() << OldType; |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1355 | if (Old->getLocation().isValid()) |
Fariborz Jahanian | c55a240 | 2009-01-16 19:58:32 +0000 | [diff] [blame] | 1356 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1357 | return New->setInvalidDecl(); |
Chris Lattner | 99cb997 | 2008-07-25 18:44:27 +0000 | [diff] [blame] | 1358 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1359 | |
John McCall | 5126fd0 | 2009-12-30 00:31:22 +0000 | [diff] [blame] | 1360 | // The types match. Link up the redeclaration chain if the old |
| 1361 | // declaration was a typedef. |
| 1362 | // FIXME: this is a potential source of wierdness if the type |
| 1363 | // spellings don't match exactly. |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 1364 | if (TypedefNameDecl *Typedef = dyn_cast<TypedefNameDecl>(Old)) |
| 1365 | New->setPreviousDeclaration(Typedef); |
John McCall | 5126fd0 | 2009-12-30 00:31:22 +0000 | [diff] [blame] | 1366 | |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 1367 | if (getLangOptions().Microsoft) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1368 | return; |
Eli Friedman | 54ecfce | 2008-06-11 06:20:39 +0000 | [diff] [blame] | 1369 | |
Chris Lattner | 32b0675 | 2009-04-17 22:04:20 +0000 | [diff] [blame] | 1370 | if (getLangOptions().CPlusPlus) { |
Douglas Gregor | 93dda72 | 2010-01-11 21:54:40 +0000 | [diff] [blame] | 1371 | // C++ [dcl.typedef]p2: |
| 1372 | // In a given non-class scope, a typedef specifier can be used to |
| 1373 | // redefine the name of any type declared in that scope to refer |
| 1374 | // to the type to which it already refers. |
Chris Lattner | 32b0675 | 2009-04-17 22:04:20 +0000 | [diff] [blame] | 1375 | if (!isa<CXXRecordDecl>(CurContext)) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1376 | return; |
Douglas Gregor | 93dda72 | 2010-01-11 21:54:40 +0000 | [diff] [blame] | 1377 | |
| 1378 | // C++0x [dcl.typedef]p4: |
| 1379 | // In a given class scope, a typedef specifier can be used to redefine |
| 1380 | // any class-name declared in that scope that is not also a typedef-name |
| 1381 | // to refer to the type to which it already refers. |
| 1382 | // |
| 1383 | // This wording came in via DR424, which was a correction to the |
| 1384 | // wording in DR56, which accidentally banned code like: |
| 1385 | // |
| 1386 | // struct S { |
| 1387 | // typedef struct A { } A; |
| 1388 | // }; |
| 1389 | // |
| 1390 | // in the C++03 standard. We implement the C++0x semantics, which |
| 1391 | // allow the above but disallow |
| 1392 | // |
| 1393 | // struct S { |
| 1394 | // typedef int I; |
| 1395 | // typedef int I; |
| 1396 | // }; |
| 1397 | // |
| 1398 | // since that was the intent of DR56. |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 1399 | if (!isa<TypedefNameDecl>(Old)) |
Douglas Gregor | 93dda72 | 2010-01-11 21:54:40 +0000 | [diff] [blame] | 1400 | return; |
| 1401 | |
Chris Lattner | 32b0675 | 2009-04-17 22:04:20 +0000 | [diff] [blame] | 1402 | Diag(New->getLocation(), diag::err_redefinition) |
| 1403 | << New->getDeclName(); |
| 1404 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1405 | return New->setInvalidDecl(); |
Daniel Dunbar | 2fe0997 | 2008-09-12 18:10:20 +0000 | [diff] [blame] | 1406 | } |
Eli Friedman | 54ecfce | 2008-06-11 06:20:39 +0000 | [diff] [blame] | 1407 | |
Chris Lattner | 32b0675 | 2009-04-17 22:04:20 +0000 | [diff] [blame] | 1408 | // If we have a redefinition of a typedef in C, emit a warning. This warning |
| 1409 | // is normally mapped to an error, but can be controlled with |
Eli Friedman | 340a4e5 | 2009-06-04 23:03:07 +0000 | [diff] [blame] | 1410 | // -Wtypedef-redefinition. If either the original or the redefinition is |
| 1411 | // in a system header, don't emit this for compatibility with GCC. |
Chris Lattner | 6d97e5e | 2010-03-01 20:59:53 +0000 | [diff] [blame] | 1412 | if (getDiagnostics().getSuppressSystemWarnings() && |
Eli Friedman | 340a4e5 | 2009-06-04 23:03:07 +0000 | [diff] [blame] | 1413 | (Context.getSourceManager().isInSystemHeader(Old->getLocation()) || |
| 1414 | Context.getSourceManager().isInSystemHeader(New->getLocation()))) |
Chris Lattner | d0359af | 2009-04-27 01:46:12 +0000 | [diff] [blame] | 1415 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1416 | |
Chris Lattner | 32b0675 | 2009-04-17 22:04:20 +0000 | [diff] [blame] | 1417 | Diag(New->getLocation(), diag::warn_redefinition_of_typedef) |
| 1418 | << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 1419 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1420 | return; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1421 | } |
| 1422 | |
Chris Lattner | 6b6b537 | 2008-06-26 18:38:35 +0000 | [diff] [blame] | 1423 | /// DeclhasAttr - returns true if decl Declaration already has the target |
| 1424 | /// attribute. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1425 | static bool |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 1426 | DeclHasAttr(const Decl *D, const Attr *A) { |
| 1427 | const OwnershipAttr *OA = dyn_cast<OwnershipAttr>(A); |
| 1428 | for (Decl::attr_iterator i = D->attr_begin(), e = D->attr_end(); i != e; ++i) |
| 1429 | if ((*i)->getKind() == A->getKind()) { |
| 1430 | // FIXME: Don't hardcode this check |
| 1431 | if (OA && isa<OwnershipAttr>(*i)) |
| 1432 | return OA->getOwnKind() == cast<OwnershipAttr>(*i)->getOwnKind(); |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 1433 | return true; |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 1434 | } |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 1435 | |
| 1436 | return false; |
| 1437 | } |
| 1438 | |
John McCall | eca5d22 | 2011-03-02 04:00:57 +0000 | [diff] [blame] | 1439 | /// mergeDeclAttributes - Copy attributes from the Old decl to the New one. |
| 1440 | static void mergeDeclAttributes(Decl *newDecl, const Decl *oldDecl, |
| 1441 | ASTContext &C) { |
| 1442 | if (!oldDecl->hasAttrs()) |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 1443 | return; |
John McCall | eca5d22 | 2011-03-02 04:00:57 +0000 | [diff] [blame] | 1444 | |
| 1445 | bool foundAny = newDecl->hasAttrs(); |
| 1446 | |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 1447 | // Ensure that any moving of objects within the allocated map is done before |
| 1448 | // we process them. |
John McCall | eca5d22 | 2011-03-02 04:00:57 +0000 | [diff] [blame] | 1449 | if (!foundAny) newDecl->setAttrs(AttrVec()); |
| 1450 | |
Peter Collingbourne | a97d70b | 2011-01-21 02:08:36 +0000 | [diff] [blame] | 1451 | for (specific_attr_iterator<InheritableAttr> |
John McCall | eca5d22 | 2011-03-02 04:00:57 +0000 | [diff] [blame] | 1452 | i = oldDecl->specific_attr_begin<InheritableAttr>(), |
| 1453 | e = oldDecl->specific_attr_end<InheritableAttr>(); i != e; ++i) { |
| 1454 | if (!DeclHasAttr(newDecl, *i)) { |
| 1455 | InheritableAttr *newAttr = cast<InheritableAttr>((*i)->clone(C)); |
| 1456 | newAttr->setInherited(true); |
| 1457 | newDecl->addAttr(newAttr); |
| 1458 | foundAny = true; |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 1459 | } |
| 1460 | } |
John McCall | eca5d22 | 2011-03-02 04:00:57 +0000 | [diff] [blame] | 1461 | |
| 1462 | if (!foundAny) newDecl->dropAttrs(); |
| 1463 | } |
| 1464 | |
| 1465 | /// mergeParamDeclAttributes - Copy attributes from the old parameter |
| 1466 | /// to the new one. |
| 1467 | static void mergeParamDeclAttributes(ParmVarDecl *newDecl, |
| 1468 | const ParmVarDecl *oldDecl, |
| 1469 | ASTContext &C) { |
| 1470 | if (!oldDecl->hasAttrs()) |
| 1471 | return; |
| 1472 | |
| 1473 | bool foundAny = newDecl->hasAttrs(); |
| 1474 | |
| 1475 | // Ensure that any moving of objects within the allocated map is |
| 1476 | // done before we process them. |
| 1477 | if (!foundAny) newDecl->setAttrs(AttrVec()); |
| 1478 | |
| 1479 | for (specific_attr_iterator<InheritableParamAttr> |
| 1480 | i = oldDecl->specific_attr_begin<InheritableParamAttr>(), |
| 1481 | e = oldDecl->specific_attr_end<InheritableParamAttr>(); i != e; ++i) { |
| 1482 | if (!DeclHasAttr(newDecl, *i)) { |
| 1483 | InheritableAttr *newAttr = cast<InheritableParamAttr>((*i)->clone(C)); |
| 1484 | newAttr->setInherited(true); |
| 1485 | newDecl->addAttr(newAttr); |
| 1486 | foundAny = true; |
| 1487 | } |
| 1488 | } |
| 1489 | |
| 1490 | if (!foundAny) newDecl->dropAttrs(); |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 1491 | } |
| 1492 | |
Dan Gohman | 3c46e8d | 2010-07-26 21:25:24 +0000 | [diff] [blame] | 1493 | namespace { |
| 1494 | |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1495 | /// Used in MergeFunctionDecl to keep track of function parameters in |
| 1496 | /// C. |
| 1497 | struct GNUCompatibleParamWarning { |
| 1498 | ParmVarDecl *OldParm; |
| 1499 | ParmVarDecl *NewParm; |
| 1500 | QualType PromotedType; |
| 1501 | }; |
| 1502 | |
Dan Gohman | 3c46e8d | 2010-07-26 21:25:24 +0000 | [diff] [blame] | 1503 | } |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 1504 | |
| 1505 | /// getSpecialMember - get the special member enum for a method. |
Anders Carlsson | 3b8c53b | 2010-04-22 05:40:53 +0000 | [diff] [blame] | 1506 | Sema::CXXSpecialMember Sema::getSpecialMember(const CXXMethodDecl *MD) { |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 1507 | if (const CXXConstructorDecl *Ctor = dyn_cast<CXXConstructorDecl>(MD)) { |
Douglas Gregor | 9e9199d | 2009-12-22 00:34:07 +0000 | [diff] [blame] | 1508 | if (Ctor->isCopyConstructor()) |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 1509 | return Sema::CXXCopyConstructor; |
Anders Carlsson | 3b8c53b | 2010-04-22 05:40:53 +0000 | [diff] [blame] | 1510 | |
| 1511 | return Sema::CXXConstructor; |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 1512 | } |
| 1513 | |
| 1514 | if (isa<CXXDestructorDecl>(MD)) |
| 1515 | return Sema::CXXDestructor; |
| 1516 | |
Douglas Gregor | 3e9438b | 2010-09-27 22:37:28 +0000 | [diff] [blame] | 1517 | assert(MD->isCopyAssignmentOperator() && |
| 1518 | "Must have copy assignment operator"); |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 1519 | return Sema::CXXCopyAssignment; |
| 1520 | } |
| 1521 | |
Sebastian Redl | 515ddd8 | 2010-06-09 21:17:41 +0000 | [diff] [blame] | 1522 | /// canRedefineFunction - checks if a function can be redefined. Currently, |
Charles Davis | f3f8d2a | 2010-02-18 02:00:42 +0000 | [diff] [blame] | 1523 | /// only extern inline functions can be redefined, and even then only in |
| 1524 | /// GNU89 mode. |
| 1525 | static bool canRedefineFunction(const FunctionDecl *FD, |
| 1526 | const LangOptions& LangOpts) { |
| 1527 | return (LangOpts.GNUMode && !LangOpts.C99 && !LangOpts.CPlusPlus && |
| 1528 | FD->isInlineSpecified() && |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 1529 | FD->getStorageClass() == SC_Extern); |
Charles Davis | f3f8d2a | 2010-02-18 02:00:42 +0000 | [diff] [blame] | 1530 | } |
| 1531 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 1532 | /// MergeFunctionDecl - We just parsed a function 'New' from |
| 1533 | /// declarator D which has the same name and scope as a previous |
| 1534 | /// declaration 'Old'. Figure out how to resolve this situation, |
| 1535 | /// merging decls or emitting diagnostics as appropriate. |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1536 | /// |
| 1537 | /// In C++, New and Old must be declarations that are not |
| 1538 | /// overloaded. Use IsOverload to determine whether New and Old are |
| 1539 | /// overloaded, and to select the Old declaration that New should be |
| 1540 | /// merged with. |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1541 | /// |
| 1542 | /// Returns true if there was an error, false otherwise. |
| 1543 | bool Sema::MergeFunctionDecl(FunctionDecl *New, Decl *OldD) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1544 | // Verify the old decl was also a function. |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 1545 | FunctionDecl *Old = 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1546 | if (FunctionTemplateDecl *OldFunctionTemplate |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 1547 | = dyn_cast<FunctionTemplateDecl>(OldD)) |
| 1548 | Old = OldFunctionTemplate->getTemplatedDecl(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1549 | else |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 1550 | Old = dyn_cast<FunctionDecl>(OldD); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1551 | if (!Old) { |
John McCall | 41ce66f | 2009-12-10 19:51:03 +0000 | [diff] [blame] | 1552 | if (UsingShadowDecl *Shadow = dyn_cast<UsingShadowDecl>(OldD)) { |
| 1553 | Diag(New->getLocation(), diag::err_using_decl_conflict_reverse); |
| 1554 | Diag(Shadow->getTargetDecl()->getLocation(), |
| 1555 | diag::note_using_decl_target); |
| 1556 | Diag(Shadow->getUsingDecl()->getLocation(), |
| 1557 | diag::note_using_decl) << 0; |
| 1558 | return true; |
| 1559 | } |
| 1560 | |
Chris Lattner | 5dc266a | 2008-11-20 06:13:02 +0000 | [diff] [blame] | 1561 | Diag(New->getLocation(), diag::err_redefinition_different_kind) |
Chris Lattner | 08631c5 | 2008-11-23 21:45:46 +0000 | [diff] [blame] | 1562 | << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 1563 | Diag(OldD->getLocation(), diag::note_previous_definition); |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1564 | return true; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1565 | } |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1566 | |
| 1567 | // Determine whether the previous declaration was a definition, |
| 1568 | // implicit declaration, or a declaration. |
| 1569 | diag::kind PrevDiag; |
| 1570 | if (Old->isThisDeclarationADefinition()) |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 1571 | PrevDiag = diag::note_previous_definition; |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1572 | else if (Old->isImplicit()) |
| 1573 | PrevDiag = diag::note_previous_implicit_declaration; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1574 | else |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 1575 | PrevDiag = diag::note_previous_declaration; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1576 | |
Chris Lattner | 8bcfc5b | 2008-04-06 23:10:54 +0000 | [diff] [blame] | 1577 | QualType OldQType = Context.getCanonicalType(Old->getType()); |
| 1578 | QualType NewQType = Context.getCanonicalType(New->getType()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1579 | |
Charles Davis | f3f8d2a | 2010-02-18 02:00:42 +0000 | [diff] [blame] | 1580 | // Don't complain about this if we're in GNU89 mode and the old function |
| 1581 | // is an extern inline function. |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1582 | if (!isa<CXXMethodDecl>(New) && !isa<CXXMethodDecl>(Old) && |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 1583 | New->getStorageClass() == SC_Static && |
| 1584 | Old->getStorageClass() != SC_Static && |
Charles Davis | f3f8d2a | 2010-02-18 02:00:42 +0000 | [diff] [blame] | 1585 | !canRedefineFunction(Old, getLangOptions())) { |
Francois Pichet | 4bada2e | 2011-04-22 19:50:06 +0000 | [diff] [blame] | 1586 | if (getLangOptions().Microsoft) { |
| 1587 | Diag(New->getLocation(), diag::warn_static_non_static) << New; |
| 1588 | Diag(Old->getLocation(), PrevDiag); |
| 1589 | } else { |
| 1590 | Diag(New->getLocation(), diag::err_static_non_static) << New; |
| 1591 | Diag(Old->getLocation(), PrevDiag); |
| 1592 | return true; |
| 1593 | } |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1594 | } |
| 1595 | |
John McCall | f82b4e8 | 2010-02-04 05:44:44 +0000 | [diff] [blame] | 1596 | // If a function is first declared with a calling convention, but is |
| 1597 | // later declared or defined without one, the second decl assumes the |
| 1598 | // calling convention of the first. |
| 1599 | // |
| 1600 | // For the new decl, we have to look at the NON-canonical type to tell the |
| 1601 | // difference between a function that really doesn't have a calling |
| 1602 | // convention and one that is declared cdecl. That's because in |
| 1603 | // canonicalization (see ASTContext.cpp), cdecl is canonicalized away |
| 1604 | // because it is the default calling convention. |
| 1605 | // |
| 1606 | // Note also that we DO NOT return at this point, because we still have |
| 1607 | // other tests to run. |
John McCall | e6a365d | 2010-12-19 02:44:49 +0000 | [diff] [blame] | 1608 | const FunctionType *OldType = cast<FunctionType>(OldQType); |
John McCall | f82b4e8 | 2010-02-04 05:44:44 +0000 | [diff] [blame] | 1609 | const FunctionType *NewType = New->getType()->getAs<FunctionType>(); |
John McCall | e6a365d | 2010-12-19 02:44:49 +0000 | [diff] [blame] | 1610 | FunctionType::ExtInfo OldTypeInfo = OldType->getExtInfo(); |
| 1611 | FunctionType::ExtInfo NewTypeInfo = NewType->getExtInfo(); |
| 1612 | bool RequiresAdjustment = false; |
Rafael Espindola | 264ba48 | 2010-03-30 20:24:48 +0000 | [diff] [blame] | 1613 | if (OldTypeInfo.getCC() != CC_Default && |
| 1614 | NewTypeInfo.getCC() == CC_Default) { |
John McCall | e6a365d | 2010-12-19 02:44:49 +0000 | [diff] [blame] | 1615 | NewTypeInfo = NewTypeInfo.withCallingConv(OldTypeInfo.getCC()); |
| 1616 | RequiresAdjustment = true; |
Rafael Espindola | 264ba48 | 2010-03-30 20:24:48 +0000 | [diff] [blame] | 1617 | } else if (!Context.isSameCallConv(OldTypeInfo.getCC(), |
| 1618 | NewTypeInfo.getCC())) { |
John McCall | f82b4e8 | 2010-02-04 05:44:44 +0000 | [diff] [blame] | 1619 | // Calling conventions really aren't compatible, so complain. |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame] | 1620 | Diag(New->getLocation(), diag::err_cconv_change) |
Rafael Espindola | 264ba48 | 2010-03-30 20:24:48 +0000 | [diff] [blame] | 1621 | << FunctionType::getNameForCallConv(NewTypeInfo.getCC()) |
| 1622 | << (OldTypeInfo.getCC() == CC_Default) |
| 1623 | << (OldTypeInfo.getCC() == CC_Default ? "" : |
| 1624 | FunctionType::getNameForCallConv(OldTypeInfo.getCC())); |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame] | 1625 | Diag(Old->getLocation(), diag::note_previous_declaration); |
John McCall | f82b4e8 | 2010-02-04 05:44:44 +0000 | [diff] [blame] | 1626 | return true; |
| 1627 | } |
| 1628 | |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame] | 1629 | // FIXME: diagnose the other way around? |
John McCall | e6a365d | 2010-12-19 02:44:49 +0000 | [diff] [blame] | 1630 | if (OldTypeInfo.getNoReturn() && !NewTypeInfo.getNoReturn()) { |
| 1631 | NewTypeInfo = NewTypeInfo.withNoReturn(true); |
| 1632 | RequiresAdjustment = true; |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame] | 1633 | } |
| 1634 | |
Douglas Gregor | d2c6490 | 2010-06-18 21:30:25 +0000 | [diff] [blame] | 1635 | // Merge regparm attribute. |
Eli Friedman | a49218e | 2011-04-09 08:18:08 +0000 | [diff] [blame] | 1636 | if (OldTypeInfo.getHasRegParm() != NewTypeInfo.getHasRegParm() || |
| 1637 | OldTypeInfo.getRegParm() != NewTypeInfo.getRegParm()) { |
| 1638 | if (NewTypeInfo.getHasRegParm()) { |
Douglas Gregor | d2c6490 | 2010-06-18 21:30:25 +0000 | [diff] [blame] | 1639 | Diag(New->getLocation(), diag::err_regparm_mismatch) |
| 1640 | << NewType->getRegParmType() |
| 1641 | << OldType->getRegParmType(); |
| 1642 | Diag(Old->getLocation(), diag::note_previous_declaration); |
| 1643 | return true; |
| 1644 | } |
John McCall | e6a365d | 2010-12-19 02:44:49 +0000 | [diff] [blame] | 1645 | |
| 1646 | NewTypeInfo = NewTypeInfo.withRegParm(OldTypeInfo.getRegParm()); |
| 1647 | RequiresAdjustment = true; |
| 1648 | } |
| 1649 | |
| 1650 | if (RequiresAdjustment) { |
| 1651 | NewType = Context.adjustFunctionType(NewType, NewTypeInfo); |
| 1652 | New->setType(QualType(NewType, 0)); |
| 1653 | NewQType = Context.getCanonicalType(New->getType()); |
Douglas Gregor | d2c6490 | 2010-06-18 21:30:25 +0000 | [diff] [blame] | 1654 | } |
| 1655 | |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1656 | if (getLangOptions().CPlusPlus) { |
| 1657 | // (C++98 13.1p2): |
| 1658 | // Certain function declarations cannot be overloaded: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1659 | // -- Function declarations that differ only in the return type |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1660 | // cannot be overloaded. |
John McCall | e6a365d | 2010-12-19 02:44:49 +0000 | [diff] [blame] | 1661 | QualType OldReturnType = OldType->getResultType(); |
| 1662 | QualType NewReturnType = cast<FunctionType>(NewQType)->getResultType(); |
Fariborz Jahanian | 2390a72 | 2010-05-19 21:37:30 +0000 | [diff] [blame] | 1663 | QualType ResQT; |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1664 | if (OldReturnType != NewReturnType) { |
Fariborz Jahanian | 2390a72 | 2010-05-19 21:37:30 +0000 | [diff] [blame] | 1665 | if (NewReturnType->isObjCObjectPointerType() |
| 1666 | && OldReturnType->isObjCObjectPointerType()) |
| 1667 | ResQT = Context.mergeObjCGCQualifiers(NewQType, OldQType); |
| 1668 | if (ResQT.isNull()) { |
Argyrios Kyrtzidis | 1de34dd | 2011-02-05 05:54:49 +0000 | [diff] [blame] | 1669 | if (New->isCXXClassMember() && New->isOutOfLine()) |
| 1670 | Diag(New->getLocation(), |
| 1671 | diag::err_member_def_does_not_match_ret_type) << New; |
| 1672 | else |
| 1673 | Diag(New->getLocation(), diag::err_ovl_diff_return_type); |
Fariborz Jahanian | 2390a72 | 2010-05-19 21:37:30 +0000 | [diff] [blame] | 1674 | Diag(Old->getLocation(), PrevDiag) << Old << Old->getType(); |
| 1675 | return true; |
| 1676 | } |
| 1677 | else |
| 1678 | NewQType = ResQT; |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1679 | } |
| 1680 | |
| 1681 | const CXXMethodDecl* OldMethod = dyn_cast<CXXMethodDecl>(Old); |
John McCall | 3d04336 | 2010-04-13 07:45:41 +0000 | [diff] [blame] | 1682 | CXXMethodDecl* NewMethod = dyn_cast<CXXMethodDecl>(New); |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 1683 | if (OldMethod && NewMethod) { |
John McCall | 3d04336 | 2010-04-13 07:45:41 +0000 | [diff] [blame] | 1684 | // Preserve triviality. |
| 1685 | NewMethod->setTrivial(OldMethod->isTrivial()); |
| 1686 | |
| 1687 | bool isFriend = NewMethod->getFriendObjectKind(); |
| 1688 | |
| 1689 | if (!isFriend && NewMethod->getLexicalDeclContext()->isRecord()) { |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 1690 | // -- Member function declarations with the same name and the |
| 1691 | // same parameter types cannot be overloaded if any of them |
| 1692 | // is a static member function declaration. |
| 1693 | if (OldMethod->isStatic() || NewMethod->isStatic()) { |
| 1694 | Diag(New->getLocation(), diag::err_ovl_static_nonstatic_member); |
| 1695 | Diag(Old->getLocation(), PrevDiag) << Old << Old->getType(); |
| 1696 | return true; |
| 1697 | } |
| 1698 | |
| 1699 | // C++ [class.mem]p1: |
| 1700 | // [...] A member shall not be declared twice in the |
| 1701 | // member-specification, except that a nested class or member |
| 1702 | // class template can be declared and then later defined. |
| 1703 | unsigned NewDiag; |
| 1704 | if (isa<CXXConstructorDecl>(OldMethod)) |
| 1705 | NewDiag = diag::err_constructor_redeclared; |
| 1706 | else if (isa<CXXDestructorDecl>(NewMethod)) |
| 1707 | NewDiag = diag::err_destructor_redeclared; |
| 1708 | else if (isa<CXXConversionDecl>(NewMethod)) |
| 1709 | NewDiag = diag::err_conv_function_redeclared; |
| 1710 | else |
| 1711 | NewDiag = diag::err_member_redeclared; |
| 1712 | |
| 1713 | Diag(New->getLocation(), NewDiag); |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1714 | Diag(Old->getLocation(), PrevDiag) << Old << Old->getType(); |
John McCall | 3d04336 | 2010-04-13 07:45:41 +0000 | [diff] [blame] | 1715 | |
| 1716 | // Complain if this is an explicit declaration of a special |
| 1717 | // member that was initially declared implicitly. |
| 1718 | // |
| 1719 | // As an exception, it's okay to befriend such methods in order |
| 1720 | // to permit the implicit constructor/destructor/operator calls. |
| 1721 | } else if (OldMethod->isImplicit()) { |
| 1722 | if (isFriend) { |
| 1723 | NewMethod->setImplicit(); |
| 1724 | } else { |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 1725 | Diag(NewMethod->getLocation(), |
| 1726 | diag::err_definition_of_implicitly_declared_member) |
Anders Carlsson | 3b8c53b | 2010-04-22 05:40:53 +0000 | [diff] [blame] | 1727 | << New << getSpecialMember(OldMethod); |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 1728 | return true; |
| 1729 | } |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1730 | } |
| 1731 | } |
| 1732 | |
| 1733 | // (C++98 8.3.5p3): |
| 1734 | // All declarations for a function shall agree exactly in both the |
| 1735 | // return type and the parameter-type-list. |
John McCall | e6a365d | 2010-12-19 02:44:49 +0000 | [diff] [blame] | 1736 | // We also want to respect all the extended bits except noreturn. |
| 1737 | |
| 1738 | // noreturn should now match unless the old type info didn't have it. |
| 1739 | QualType OldQTypeForComparison = OldQType; |
| 1740 | if (!OldTypeInfo.getNoReturn() && NewTypeInfo.getNoReturn()) { |
| 1741 | assert(OldQType == QualType(OldType, 0)); |
| 1742 | const FunctionType *OldTypeForComparison |
| 1743 | = Context.adjustFunctionType(OldType, OldTypeInfo.withNoReturn(true)); |
| 1744 | OldQTypeForComparison = QualType(OldTypeForComparison, 0); |
| 1745 | assert(OldQTypeForComparison.isCanonical()); |
| 1746 | } |
| 1747 | |
| 1748 | if (OldQTypeForComparison == NewQType) |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1749 | return MergeCompatibleFunctionDecls(New, Old); |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1750 | |
| 1751 | // Fall through for conflicting redeclarations and redefinitions. |
Douglas Gregor | f009795 | 2008-04-21 02:02:58 +0000 | [diff] [blame] | 1752 | } |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 1753 | |
| 1754 | // C: Function types need to be compatible, not identical. This handles |
Steve Naroff | adbbd0c | 2008-01-14 20:51:29 +0000 | [diff] [blame] | 1755 | // duplicate function decls like "void f(int); void f(enum X);" properly. |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 1756 | if (!getLangOptions().CPlusPlus && |
Eli Friedman | 3d815e7 | 2008-08-22 00:56:42 +0000 | [diff] [blame] | 1757 | Context.typesAreCompatible(OldQType, NewQType)) { |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 1758 | const FunctionType *OldFuncType = OldQType->getAs<FunctionType>(); |
| 1759 | const FunctionType *NewFuncType = NewQType->getAs<FunctionType>(); |
Douglas Gregor | 72564e7 | 2009-02-26 23:50:07 +0000 | [diff] [blame] | 1760 | const FunctionProtoType *OldProto = 0; |
| 1761 | if (isa<FunctionNoProtoType>(NewFuncType) && |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1762 | (OldProto = dyn_cast<FunctionProtoType>(OldFuncType))) { |
Douglas Gregor | 6871981 | 2009-02-16 18:20:44 +0000 | [diff] [blame] | 1763 | // The old declaration provided a function prototype, but the |
| 1764 | // new declaration does not. Merge in the prototype. |
Sebastian Redl | 465226e | 2009-05-27 22:11:52 +0000 | [diff] [blame] | 1765 | assert(!OldProto->hasExceptionSpec() && "Exception spec in C"); |
Douglas Gregor | 6871981 | 2009-02-16 18:20:44 +0000 | [diff] [blame] | 1766 | llvm::SmallVector<QualType, 16> ParamTypes(OldProto->arg_type_begin(), |
| 1767 | OldProto->arg_type_end()); |
| 1768 | NewQType = Context.getFunctionType(NewFuncType->getResultType(), |
Jay Foad | beaaccd | 2009-05-21 09:52:38 +0000 | [diff] [blame] | 1769 | ParamTypes.data(), ParamTypes.size(), |
John McCall | e23cf43 | 2010-12-14 08:05:40 +0000 | [diff] [blame] | 1770 | OldProto->getExtProtoInfo()); |
Douglas Gregor | 6871981 | 2009-02-16 18:20:44 +0000 | [diff] [blame] | 1771 | New->setType(NewQType); |
Anders Carlsson | a75e853 | 2009-05-14 21:46:00 +0000 | [diff] [blame] | 1772 | New->setHasInheritedPrototype(); |
Douglas Gregor | 450da98 | 2009-02-16 20:58:07 +0000 | [diff] [blame] | 1773 | |
| 1774 | // Synthesize a parameter for each argument type. |
| 1775 | llvm::SmallVector<ParmVarDecl*, 16> Params; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1776 | for (FunctionProtoType::arg_type_iterator |
| 1777 | ParamType = OldProto->arg_type_begin(), |
Douglas Gregor | 450da98 | 2009-02-16 20:58:07 +0000 | [diff] [blame] | 1778 | ParamEnd = OldProto->arg_type_end(); |
| 1779 | ParamType != ParamEnd; ++ParamType) { |
| 1780 | ParmVarDecl *Param = ParmVarDecl::Create(Context, New, |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 1781 | SourceLocation(), |
Douglas Gregor | 450da98 | 2009-02-16 20:58:07 +0000 | [diff] [blame] | 1782 | SourceLocation(), 0, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 1783 | *ParamType, /*TInfo=*/0, |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 1784 | SC_None, SC_None, |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 1785 | 0); |
John McCall | fb44de9 | 2011-05-01 22:35:37 +0000 | [diff] [blame] | 1786 | Param->setScopeInfo(0, Params.size()); |
Douglas Gregor | 450da98 | 2009-02-16 20:58:07 +0000 | [diff] [blame] | 1787 | Param->setImplicit(); |
| 1788 | Params.push_back(Param); |
| 1789 | } |
| 1790 | |
Douglas Gregor | 838db38 | 2010-02-11 01:19:42 +0000 | [diff] [blame] | 1791 | New->setParams(Params.data(), Params.size()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1792 | } |
Douglas Gregor | 6871981 | 2009-02-16 18:20:44 +0000 | [diff] [blame] | 1793 | |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1794 | return MergeCompatibleFunctionDecls(New, Old); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 1795 | } |
Chris Lattner | e3995fe | 2007-11-06 06:07:26 +0000 | [diff] [blame] | 1796 | |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1797 | // GNU C permits a K&R definition to follow a prototype declaration |
| 1798 | // if the declared types of the parameters in the K&R definition |
| 1799 | // match the types in the prototype declaration, even when the |
| 1800 | // promoted types of the parameters from the K&R definition differ |
| 1801 | // from the types in the prototype. GCC then keeps the types from |
| 1802 | // the prototype. |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 1803 | // |
| 1804 | // If a variadic prototype is followed by a non-variadic K&R definition, |
| 1805 | // the K&R definition becomes variadic. This is sort of an edge case, but |
| 1806 | // it's legal per the standard depending on how you read C99 6.7.5.3p15 and |
| 1807 | // C99 6.9.1p8. |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1808 | if (!getLangOptions().CPlusPlus && |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1809 | Old->hasPrototype() && !New->hasPrototype() && |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 1810 | New->getType()->getAs<FunctionProtoType>() && |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1811 | Old->getNumParams() == New->getNumParams()) { |
| 1812 | llvm::SmallVector<QualType, 16> ArgTypes; |
| 1813 | llvm::SmallVector<GNUCompatibleParamWarning, 16> Warnings; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1814 | const FunctionProtoType *OldProto |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 1815 | = Old->getType()->getAs<FunctionProtoType>(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1816 | const FunctionProtoType *NewProto |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 1817 | = New->getType()->getAs<FunctionProtoType>(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1818 | |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1819 | // Determine whether this is the GNU C extension. |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 1820 | QualType MergedReturn = Context.mergeTypes(OldProto->getResultType(), |
| 1821 | NewProto->getResultType()); |
| 1822 | bool LooseCompatible = !MergedReturn.isNull(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1823 | for (unsigned Idx = 0, End = Old->getNumParams(); |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 1824 | LooseCompatible && Idx != End; ++Idx) { |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1825 | ParmVarDecl *OldParm = Old->getParamDecl(Idx); |
| 1826 | ParmVarDecl *NewParm = New->getParamDecl(Idx); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1827 | if (Context.typesAreCompatible(OldParm->getType(), |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1828 | NewProto->getArgType(Idx))) { |
| 1829 | ArgTypes.push_back(NewParm->getType()); |
| 1830 | } else if (Context.typesAreCompatible(OldParm->getType(), |
Douglas Gregor | 447234d | 2010-07-29 15:18:02 +0000 | [diff] [blame] | 1831 | NewParm->getType(), |
| 1832 | /*CompareUnqualified=*/true)) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1833 | GNUCompatibleParamWarning Warn |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1834 | = { OldParm, NewParm, NewProto->getArgType(Idx) }; |
| 1835 | Warnings.push_back(Warn); |
| 1836 | ArgTypes.push_back(NewParm->getType()); |
| 1837 | } else |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 1838 | LooseCompatible = false; |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1839 | } |
| 1840 | |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 1841 | if (LooseCompatible) { |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1842 | for (unsigned Warn = 0; Warn < Warnings.size(); ++Warn) { |
| 1843 | Diag(Warnings[Warn].NewParm->getLocation(), |
| 1844 | diag::ext_param_promoted_not_compatible_with_prototype) |
| 1845 | << Warnings[Warn].PromotedType |
| 1846 | << Warnings[Warn].OldParm->getType(); |
Douglas Gregor | 447234d | 2010-07-29 15:18:02 +0000 | [diff] [blame] | 1847 | if (Warnings[Warn].OldParm->getLocation().isValid()) |
| 1848 | Diag(Warnings[Warn].OldParm->getLocation(), |
| 1849 | diag::note_previous_declaration); |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1850 | } |
| 1851 | |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 1852 | New->setType(Context.getFunctionType(MergedReturn, &ArgTypes[0], |
| 1853 | ArgTypes.size(), |
John McCall | e23cf43 | 2010-12-14 08:05:40 +0000 | [diff] [blame] | 1854 | OldProto->getExtProtoInfo())); |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1855 | return MergeCompatibleFunctionDecls(New, Old); |
| 1856 | } |
| 1857 | |
| 1858 | // Fall through to diagnose conflicting types. |
| 1859 | } |
| 1860 | |
Steve Naroff | 837618c | 2008-01-16 15:01:34 +0000 | [diff] [blame] | 1861 | // A function that has already been declared has been redeclared or defined |
| 1862 | // with a different type- show appropriate diagnostic |
Douglas Gregor | 7814e6d | 2009-09-12 00:22:50 +0000 | [diff] [blame] | 1863 | if (unsigned BuiltinID = Old->getBuiltinID()) { |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1864 | // The user has declared a builtin function with an incompatible |
| 1865 | // signature. |
| 1866 | if (Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) { |
| 1867 | // The function the user is redeclaring is a library-defined |
| 1868 | // function like 'malloc' or 'printf'. Warn about the |
Douglas Gregor | 374e156 | 2009-03-23 17:47:24 +0000 | [diff] [blame] | 1869 | // redeclaration, then pretend that we don't know about this |
| 1870 | // library built-in. |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1871 | Diag(New->getLocation(), diag::warn_redecl_library_builtin) << New; |
| 1872 | Diag(Old->getLocation(), diag::note_previous_builtin_declaration) |
| 1873 | << Old << Old->getType(); |
Douglas Gregor | 374e156 | 2009-03-23 17:47:24 +0000 | [diff] [blame] | 1874 | New->getIdentifier()->setBuiltinID(Builtin::NotBuiltin); |
| 1875 | Old->setInvalidDecl(); |
| 1876 | return false; |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1877 | } |
Steve Naroff | 837618c | 2008-01-16 15:01:34 +0000 | [diff] [blame] | 1878 | |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1879 | PrevDiag = diag::note_previous_builtin_declaration; |
| 1880 | } |
| 1881 | |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 1882 | Diag(New->getLocation(), diag::err_conflicting_types) << New->getDeclName(); |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1883 | Diag(Old->getLocation(), PrevDiag) << Old << Old->getType(); |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1884 | return true; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1885 | } |
| 1886 | |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1887 | /// \brief Completes the merge of two function declarations that are |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1888 | /// known to be compatible. |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1889 | /// |
| 1890 | /// This routine handles the merging of attributes and other |
| 1891 | /// properties of function declarations form the old declaration to |
| 1892 | /// the new declaration, once we know that New is in fact a |
| 1893 | /// redeclaration of Old. |
| 1894 | /// |
| 1895 | /// \returns false |
| 1896 | bool Sema::MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old) { |
| 1897 | // Merge the attributes |
John McCall | eca5d22 | 2011-03-02 04:00:57 +0000 | [diff] [blame] | 1898 | mergeDeclAttributes(New, Old, Context); |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1899 | |
| 1900 | // Merge the storage class. |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 1901 | if (Old->getStorageClass() != SC_Extern && |
| 1902 | Old->getStorageClass() != SC_None) |
Douglas Gregor | 9f9bf25 | 2009-04-28 06:37:30 +0000 | [diff] [blame] | 1903 | New->setStorageClass(Old->getStorageClass()); |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1904 | |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1905 | // Merge "pure" flag. |
| 1906 | if (Old->isPure()) |
| 1907 | New->setPure(); |
| 1908 | |
John McCall | eca5d22 | 2011-03-02 04:00:57 +0000 | [diff] [blame] | 1909 | // Merge attributes from the parameters. These can mismatch with K&R |
| 1910 | // declarations. |
| 1911 | if (New->getNumParams() == Old->getNumParams()) |
| 1912 | for (unsigned i = 0, e = New->getNumParams(); i != e; ++i) |
| 1913 | mergeParamDeclAttributes(New->getParamDecl(i), Old->getParamDecl(i), |
| 1914 | Context); |
| 1915 | |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1916 | if (getLangOptions().CPlusPlus) |
| 1917 | return MergeCXXFunctionDecl(New, Old); |
| 1918 | |
| 1919 | return false; |
| 1920 | } |
| 1921 | |
John McCall | eca5d22 | 2011-03-02 04:00:57 +0000 | [diff] [blame] | 1922 | void Sema::mergeObjCMethodDecls(ObjCMethodDecl *newMethod, |
| 1923 | const ObjCMethodDecl *oldMethod) { |
| 1924 | // Merge the attributes. |
| 1925 | mergeDeclAttributes(newMethod, oldMethod, Context); |
| 1926 | |
| 1927 | // Merge attributes from the parameters. |
| 1928 | for (ObjCMethodDecl::param_iterator oi = oldMethod->param_begin(), |
| 1929 | ni = newMethod->param_begin(), ne = newMethod->param_end(); |
| 1930 | ni != ne; ++ni, ++oi) |
| 1931 | mergeParamDeclAttributes(*ni, *oi, Context); |
| 1932 | } |
| 1933 | |
Sebastian Redl | 60618fa | 2011-03-12 11:50:43 +0000 | [diff] [blame] | 1934 | /// MergeVarDeclTypes - We parsed a variable 'New' which has the same name and |
| 1935 | /// scope as a previous declaration 'Old'. Figure out how to merge their types, |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 1936 | /// emitting diagnostics as appropriate. |
| 1937 | /// |
| 1938 | /// Declarations using the auto type specifier (C++ [decl.spec.auto]) call back |
| 1939 | /// to here in AddInitializerToDecl and AddCXXDirectInitializerToDecl. We can't |
| 1940 | /// check them before the initializer is attached. |
| 1941 | /// |
| 1942 | void Sema::MergeVarDeclTypes(VarDecl *New, VarDecl *Old) { |
| 1943 | if (New->isInvalidDecl() || Old->isInvalidDecl()) |
| 1944 | return; |
| 1945 | |
| 1946 | QualType MergedT; |
| 1947 | if (getLangOptions().CPlusPlus) { |
| 1948 | AutoType *AT = New->getType()->getContainedAutoType(); |
| 1949 | if (AT && !AT->isDeduced()) { |
| 1950 | // We don't know what the new type is until the initializer is attached. |
| 1951 | return; |
Sebastian Redl | 60618fa | 2011-03-12 11:50:43 +0000 | [diff] [blame] | 1952 | } else if (Context.hasSameType(New->getType(), Old->getType())) { |
| 1953 | // These could still be something that needs exception specs checked. |
| 1954 | return MergeVarDeclExceptionSpecs(New, Old); |
| 1955 | } |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 1956 | // C++ [basic.link]p10: |
| 1957 | // [...] the types specified by all declarations referring to a given |
| 1958 | // object or function shall be identical, except that declarations for an |
| 1959 | // array object can specify array types that differ by the presence or |
| 1960 | // absence of a major array bound (8.3.4). |
| 1961 | else if (Old->getType()->isIncompleteArrayType() && |
| 1962 | New->getType()->isArrayType()) { |
| 1963 | CanQual<ArrayType> OldArray |
| 1964 | = Context.getCanonicalType(Old->getType())->getAs<ArrayType>(); |
| 1965 | CanQual<ArrayType> NewArray |
| 1966 | = Context.getCanonicalType(New->getType())->getAs<ArrayType>(); |
| 1967 | if (OldArray->getElementType() == NewArray->getElementType()) |
| 1968 | MergedT = New->getType(); |
| 1969 | } else if (Old->getType()->isArrayType() && |
| 1970 | New->getType()->isIncompleteArrayType()) { |
| 1971 | CanQual<ArrayType> OldArray |
| 1972 | = Context.getCanonicalType(Old->getType())->getAs<ArrayType>(); |
| 1973 | CanQual<ArrayType> NewArray |
| 1974 | = Context.getCanonicalType(New->getType())->getAs<ArrayType>(); |
| 1975 | if (OldArray->getElementType() == NewArray->getElementType()) |
| 1976 | MergedT = Old->getType(); |
| 1977 | } else if (New->getType()->isObjCObjectPointerType() |
| 1978 | && Old->getType()->isObjCObjectPointerType()) { |
| 1979 | MergedT = Context.mergeObjCGCQualifiers(New->getType(), |
| 1980 | Old->getType()); |
| 1981 | } |
| 1982 | } else { |
| 1983 | MergedT = Context.mergeTypes(New->getType(), Old->getType()); |
| 1984 | } |
| 1985 | if (MergedT.isNull()) { |
| 1986 | Diag(New->getLocation(), diag::err_redefinition_different_type) |
| 1987 | << New->getDeclName(); |
| 1988 | Diag(Old->getLocation(), diag::note_previous_definition); |
| 1989 | return New->setInvalidDecl(); |
| 1990 | } |
| 1991 | New->setType(MergedT); |
| 1992 | } |
| 1993 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1994 | /// MergeVarDecl - We just parsed a variable 'New' which has the same name |
| 1995 | /// and scope as a previous declaration 'Old'. Figure out how to resolve this |
| 1996 | /// situation, merging decls or emitting diagnostics as appropriate. |
| 1997 | /// |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1998 | /// Tentative definition rules (C99 6.9.2p2) are checked by |
| 1999 | /// FinalizeDeclaratorGroup. Unfortunately, we can't analyze tentative |
Steve Naroff | ff9eb1f | 2008-08-08 17:50:35 +0000 | [diff] [blame] | 2000 | /// definitions here, since the initializer hasn't been attached. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2001 | /// |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2002 | void Sema::MergeVarDecl(VarDecl *New, LookupResult &Previous) { |
| 2003 | // If the new decl is already invalid, don't do any other checking. |
| 2004 | if (New->isInvalidDecl()) |
| 2005 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2006 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 2007 | // Verify the old decl was also a variable. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2008 | VarDecl *Old = 0; |
| 2009 | if (!Previous.isSingleResult() || |
| 2010 | !(Old = dyn_cast<VarDecl>(Previous.getFoundDecl()))) { |
Chris Lattner | f3a41af | 2008-11-20 06:38:18 +0000 | [diff] [blame] | 2011 | Diag(New->getLocation(), diag::err_redefinition_different_kind) |
Chris Lattner | 08631c5 | 2008-11-23 21:45:46 +0000 | [diff] [blame] | 2012 | << New->getDeclName(); |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2013 | Diag(Previous.getRepresentativeDecl()->getLocation(), |
| 2014 | diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2015 | return New->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 2016 | } |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 2017 | |
Douglas Gregor | 7f6ff02 | 2010-08-30 14:32:14 +0000 | [diff] [blame] | 2018 | // C++ [class.mem]p1: |
| 2019 | // A member shall not be declared twice in the member-specification [...] |
| 2020 | // |
| 2021 | // Here, we need only consider static data members. |
| 2022 | if (Old->isStaticDataMember() && !New->isOutOfLine()) { |
| 2023 | Diag(New->getLocation(), diag::err_duplicate_member) |
| 2024 | << New->getIdentifier(); |
| 2025 | Diag(Old->getLocation(), diag::note_previous_declaration); |
| 2026 | New->setInvalidDecl(); |
| 2027 | } |
| 2028 | |
John McCall | eca5d22 | 2011-03-02 04:00:57 +0000 | [diff] [blame] | 2029 | mergeDeclAttributes(New, Old, Context); |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 2030 | |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 2031 | // Merge the types. |
| 2032 | MergeVarDeclTypes(New, Old); |
| 2033 | if (New->isInvalidDecl()) |
| 2034 | return; |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 2035 | |
Steve Naroff | b7b032e | 2008-01-30 00:44:01 +0000 | [diff] [blame] | 2036 | // C99 6.2.2p4: Check if we have a static decl followed by a non-static. |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 2037 | if (New->getStorageClass() == SC_Static && |
| 2038 | (Old->getStorageClass() == SC_None || Old->hasExternalStorage())) { |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 2039 | Diag(New->getLocation(), diag::err_static_non_static) << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 2040 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2041 | return New->setInvalidDecl(); |
Steve Naroff | b7b032e | 2008-01-30 00:44:01 +0000 | [diff] [blame] | 2042 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2043 | // C99 6.2.2p4: |
Douglas Gregor | 5ef122e | 2009-03-19 22:01:50 +0000 | [diff] [blame] | 2044 | // For an identifier declared with the storage-class specifier |
| 2045 | // extern in a scope in which a prior declaration of that |
| 2046 | // identifier is visible,23) if the prior declaration specifies |
| 2047 | // internal or external linkage, the linkage of the identifier at |
| 2048 | // the later declaration is the same as the linkage specified at |
| 2049 | // the prior declaration. If no prior declaration is visible, or |
| 2050 | // if the prior declaration specifies no linkage, then the |
| 2051 | // identifier has external linkage. |
Douglas Gregor | 38179b2 | 2009-03-23 16:17:01 +0000 | [diff] [blame] | 2052 | if (New->hasExternalStorage() && Old->hasLinkage()) |
Douglas Gregor | 5ef122e | 2009-03-19 22:01:50 +0000 | [diff] [blame] | 2053 | /* Okay */; |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 2054 | else if (New->getStorageClass() != SC_Static && |
| 2055 | Old->getStorageClass() == SC_Static) { |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 2056 | Diag(New->getLocation(), diag::err_non_static_static) << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 2057 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2058 | return New->setInvalidDecl(); |
Steve Naroff | b7b032e | 2008-01-30 00:44:01 +0000 | [diff] [blame] | 2059 | } |
Daniel Dunbar | 5466c7b | 2009-04-14 02:25:56 +0000 | [diff] [blame] | 2060 | |
Argyrios Kyrtzidis | 6684d85 | 2011-01-31 07:04:46 +0000 | [diff] [blame] | 2061 | // Check if extern is followed by non-extern and vice-versa. |
| 2062 | if (New->hasExternalStorage() && |
| 2063 | !Old->hasLinkage() && Old->isLocalVarDecl()) { |
| 2064 | Diag(New->getLocation(), diag::err_extern_non_extern) << New->getDeclName(); |
| 2065 | Diag(Old->getLocation(), diag::note_previous_definition); |
| 2066 | return New->setInvalidDecl(); |
| 2067 | } |
| 2068 | if (Old->hasExternalStorage() && |
| 2069 | !New->hasLinkage() && New->isLocalVarDecl()) { |
| 2070 | Diag(New->getLocation(), diag::err_non_extern_extern) << New->getDeclName(); |
| 2071 | Diag(Old->getLocation(), diag::note_previous_definition); |
| 2072 | return New->setInvalidDecl(); |
| 2073 | } |
| 2074 | |
Steve Naroff | 094cefb | 2008-09-17 14:05:40 +0000 | [diff] [blame] | 2075 | // Variables with external linkage are analyzed in FinalizeDeclaratorGroup. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2076 | |
Daniel Dunbar | 5466c7b | 2009-04-14 02:25:56 +0000 | [diff] [blame] | 2077 | // FIXME: The test for external storage here seems wrong? We still |
| 2078 | // need to check for mismatches. |
| 2079 | if (!New->hasExternalStorage() && !New->isFileVarDecl() && |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 2080 | // Don't complain about out-of-line definitions of static members. |
| 2081 | !(Old->getLexicalDeclContext()->isRecord() && |
| 2082 | !New->getLexicalDeclContext()->isRecord())) { |
Chris Lattner | 08631c5 | 2008-11-23 21:45:46 +0000 | [diff] [blame] | 2083 | Diag(New->getLocation(), diag::err_redefinition) << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 2084 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2085 | return New->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 2086 | } |
Douglas Gregor | 275a369 | 2009-03-10 23:43:53 +0000 | [diff] [blame] | 2087 | |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 2088 | if (New->isThreadSpecified() && !Old->isThreadSpecified()) { |
| 2089 | Diag(New->getLocation(), diag::err_thread_non_thread) << New->getDeclName(); |
| 2090 | Diag(Old->getLocation(), diag::note_previous_definition); |
| 2091 | } else if (!New->isThreadSpecified() && Old->isThreadSpecified()) { |
| 2092 | Diag(New->getLocation(), diag::err_non_thread_thread) << New->getDeclName(); |
| 2093 | Diag(Old->getLocation(), diag::note_previous_definition); |
| 2094 | } |
| 2095 | |
Sebastian Redl | 4cae1b3 | 2010-02-02 18:35:11 +0000 | [diff] [blame] | 2096 | // C++ doesn't have tentative definitions, so go right ahead and check here. |
| 2097 | const VarDecl *Def; |
Sebastian Redl | 6c048a9 | 2010-02-03 02:08:48 +0000 | [diff] [blame] | 2098 | if (getLangOptions().CPlusPlus && |
| 2099 | New->isThisDeclarationADefinition() == VarDecl::Definition && |
Sebastian Redl | 4cae1b3 | 2010-02-02 18:35:11 +0000 | [diff] [blame] | 2100 | (Def = Old->getDefinition())) { |
| 2101 | Diag(New->getLocation(), diag::err_redefinition) |
| 2102 | << New->getDeclName(); |
| 2103 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 2104 | New->setInvalidDecl(); |
| 2105 | return; |
| 2106 | } |
Fariborz Jahanian | fba9e8f | 2010-06-25 00:05:45 +0000 | [diff] [blame] | 2107 | // c99 6.2.2 P4. |
| 2108 | // For an identifier declared with the storage-class specifier extern in a |
| 2109 | // scope in which a prior declaration of that identifier is visible, if |
| 2110 | // the prior declaration specifies internal or external linkage, the linkage |
| 2111 | // of the identifier at the later declaration is the same as the linkage |
| 2112 | // specified at the prior declaration. |
| 2113 | // FIXME. revisit this code. |
Fariborz Jahanian | 2bf6d7b | 2010-06-21 16:08:37 +0000 | [diff] [blame] | 2114 | if (New->hasExternalStorage() && |
Fariborz Jahanian | 7d99e98 | 2010-06-24 18:50:41 +0000 | [diff] [blame] | 2115 | Old->getLinkage() == InternalLinkage && |
| 2116 | New->getDeclContext() == Old->getDeclContext()) |
Fariborz Jahanian | 2bf6d7b | 2010-06-21 16:08:37 +0000 | [diff] [blame] | 2117 | New->setStorageClass(Old->getStorageClass()); |
| 2118 | |
Douglas Gregor | 275a369 | 2009-03-10 23:43:53 +0000 | [diff] [blame] | 2119 | // Keep a chain of previous declarations. |
| 2120 | New->setPreviousDeclaration(Old); |
John McCall | 46460a6 | 2010-01-20 21:53:11 +0000 | [diff] [blame] | 2121 | |
| 2122 | // Inherit access appropriately. |
| 2123 | New->setAccess(Old->getAccess()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 2124 | } |
| 2125 | |
| 2126 | /// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with |
| 2127 | /// no declarator (e.g. "struct foo;") is parsed. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2128 | Decl *Sema::ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, |
John McCall | ac4df24 | 2011-03-22 23:00:04 +0000 | [diff] [blame] | 2129 | DeclSpec &DS) { |
Chandler Carruth | 0f4be74 | 2011-05-03 18:35:10 +0000 | [diff] [blame] | 2130 | return ParsedFreeStandingDeclSpec(S, AS, DS, |
| 2131 | MultiTemplateParamsArg(*this, 0, 0)); |
| 2132 | } |
| 2133 | |
| 2134 | /// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with |
| 2135 | /// no declarator (e.g. "struct foo;") is parsed. It also accopts template |
| 2136 | /// parameters to cope with template friend declarations. |
| 2137 | Decl *Sema::ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, |
| 2138 | DeclSpec &DS, |
| 2139 | MultiTemplateParamsArg TemplateParams) { |
John McCall | e3af023 | 2009-10-07 23:34:25 +0000 | [diff] [blame] | 2140 | Decl *TagD = 0; |
Douglas Gregor | 1a51b4a | 2009-02-09 15:09:02 +0000 | [diff] [blame] | 2141 | TagDecl *Tag = 0; |
| 2142 | if (DS.getTypeSpecType() == DeclSpec::TST_class || |
| 2143 | DS.getTypeSpecType() == DeclSpec::TST_struct || |
| 2144 | DS.getTypeSpecType() == DeclSpec::TST_union || |
Douglas Gregor | 4d9a16f | 2009-05-12 23:25:50 +0000 | [diff] [blame] | 2145 | DS.getTypeSpecType() == DeclSpec::TST_enum) { |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 2146 | TagD = DS.getRepAsDecl(); |
John McCall | e3af023 | 2009-10-07 23:34:25 +0000 | [diff] [blame] | 2147 | |
| 2148 | if (!TagD) // We probably had an error |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2149 | return 0; |
Douglas Gregor | 4d9a16f | 2009-05-12 23:25:50 +0000 | [diff] [blame] | 2150 | |
John McCall | 67d1a67 | 2009-08-06 02:15:43 +0000 | [diff] [blame] | 2151 | // Note that the above type specs guarantee that the |
| 2152 | // type rep is a Decl, whereas in many of the others |
| 2153 | // it's a Type. |
John McCall | e3af023 | 2009-10-07 23:34:25 +0000 | [diff] [blame] | 2154 | Tag = dyn_cast<TagDecl>(TagD); |
Douglas Gregor | 4d9a16f | 2009-05-12 23:25:50 +0000 | [diff] [blame] | 2155 | } |
Douglas Gregor | 1a51b4a | 2009-02-09 15:09:02 +0000 | [diff] [blame] | 2156 | |
Nuno Lopes | 0a8bab0 | 2009-12-17 11:35:26 +0000 | [diff] [blame] | 2157 | if (unsigned TypeQuals = DS.getTypeQualifiers()) { |
| 2158 | // Enforce C99 6.7.3p2: "Types other than pointer types derived from object |
| 2159 | // or incomplete types shall not be restrict-qualified." |
| 2160 | if (TypeQuals & DeclSpec::TQ_restrict) |
| 2161 | Diag(DS.getRestrictSpecLoc(), |
| 2162 | diag::err_typecheck_invalid_restrict_not_pointer_noarg) |
| 2163 | << DS.getSourceRange(); |
| 2164 | } |
| 2165 | |
Douglas Gregor | d85bea2 | 2009-09-26 06:47:28 +0000 | [diff] [blame] | 2166 | if (DS.isFriendSpecified()) { |
John McCall | 9a34edb | 2010-10-19 01:40:49 +0000 | [diff] [blame] | 2167 | // If we're dealing with a decl but not a TagDecl, assume that |
| 2168 | // whatever routines created it handled the friendship aspect. |
| 2169 | if (TagD && !Tag) |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2170 | return 0; |
Chandler Carruth | 0f4be74 | 2011-05-03 18:35:10 +0000 | [diff] [blame] | 2171 | return ActOnFriendTypeDecl(S, DS, TemplateParams); |
Douglas Gregor | d85bea2 | 2009-09-26 06:47:28 +0000 | [diff] [blame] | 2172 | } |
John McCall | ac4df24 | 2011-03-22 23:00:04 +0000 | [diff] [blame] | 2173 | |
| 2174 | // Track whether we warned about the fact that there aren't any |
| 2175 | // declarators. |
| 2176 | bool emittedWarning = false; |
Douglas Gregor | d85bea2 | 2009-09-26 06:47:28 +0000 | [diff] [blame] | 2177 | |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 2178 | if (RecordDecl *Record = dyn_cast_or_null<RecordDecl>(Tag)) { |
John McCall | 7f040a9 | 2010-12-24 02:08:15 +0000 | [diff] [blame] | 2179 | ProcessDeclAttributeList(S, Record, DS.getAttributes().getList()); |
Chris Lattner | d451f83 | 2009-10-25 22:21:57 +0000 | [diff] [blame] | 2180 | |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 2181 | if (!Record->getDeclName() && Record->isDefinition() && |
Douglas Gregor | a71c129 | 2009-03-06 23:06:59 +0000 | [diff] [blame] | 2182 | DS.getStorageClassSpec() != DeclSpec::SCS_typedef) { |
| 2183 | if (getLangOptions().CPlusPlus || |
| 2184 | Record->getDeclContext()->isRecord()) |
John McCall | aec0371 | 2010-05-21 20:45:30 +0000 | [diff] [blame] | 2185 | return BuildAnonymousStructOrUnion(S, DS, AS, Record); |
Douglas Gregor | a71c129 | 2009-03-06 23:06:59 +0000 | [diff] [blame] | 2186 | |
Douglas Gregor | cb821d0 | 2010-04-08 21:33:23 +0000 | [diff] [blame] | 2187 | Diag(DS.getSourceRange().getBegin(), diag::ext_no_declarators) |
Douglas Gregor | a71c129 | 2009-03-06 23:06:59 +0000 | [diff] [blame] | 2188 | << DS.getSourceRange(); |
John McCall | ac4df24 | 2011-03-22 23:00:04 +0000 | [diff] [blame] | 2189 | emittedWarning = true; |
Douglas Gregor | a71c129 | 2009-03-06 23:06:59 +0000 | [diff] [blame] | 2190 | } |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 2191 | } |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 2192 | |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 2193 | // Check for Microsoft C extension: anonymous struct. |
| 2194 | if (getLangOptions().Microsoft && !getLangOptions().CPlusPlus && |
| 2195 | CurContext->isRecord() && |
| 2196 | DS.getStorageClassSpec() == DeclSpec::SCS_unspecified) { |
| 2197 | // Handle 2 kinds of anonymous struct: |
| 2198 | // struct STRUCT; |
| 2199 | // and |
| 2200 | // STRUCT_TYPE; <- where STRUCT_TYPE is a typedef struct. |
| 2201 | RecordDecl *Record = dyn_cast_or_null<RecordDecl>(Tag); |
| 2202 | if ((Record && Record->getDeclName() && !Record->isDefinition()) || |
| 2203 | (DS.getTypeSpecType() == DeclSpec::TST_typename && |
| 2204 | DS.getRepAsType().get()->isStructureType())) { |
| 2205 | Diag(DS.getSourceRange().getBegin(), diag::ext_ms_anonymous_struct) |
| 2206 | << DS.getSourceRange(); |
| 2207 | return BuildMicrosoftCAnonymousStruct(S, DS, Record); |
| 2208 | } |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 2209 | } |
Douglas Gregor | d85bea2 | 2009-09-26 06:47:28 +0000 | [diff] [blame] | 2210 | |
Douglas Gregor | a131d0f | 2010-07-13 06:24:26 +0000 | [diff] [blame] | 2211 | if (getLangOptions().CPlusPlus && |
| 2212 | DS.getStorageClassSpec() != DeclSpec::SCS_typedef) |
| 2213 | if (EnumDecl *Enum = dyn_cast_or_null<EnumDecl>(Tag)) |
| 2214 | if (Enum->enumerator_begin() == Enum->enumerator_end() && |
John McCall | ac4df24 | 2011-03-22 23:00:04 +0000 | [diff] [blame] | 2215 | !Enum->getIdentifier() && !Enum->isInvalidDecl()) { |
Douglas Gregor | a131d0f | 2010-07-13 06:24:26 +0000 | [diff] [blame] | 2216 | Diag(Enum->getLocation(), diag::ext_no_declarators) |
| 2217 | << DS.getSourceRange(); |
John McCall | ac4df24 | 2011-03-22 23:00:04 +0000 | [diff] [blame] | 2218 | emittedWarning = true; |
| 2219 | } |
| 2220 | |
| 2221 | // Skip all the checks below if we have a type error. |
| 2222 | if (DS.getTypeSpecType() == DeclSpec::TST_error) return TagD; |
Douglas Gregor | a131d0f | 2010-07-13 06:24:26 +0000 | [diff] [blame] | 2223 | |
John McCall | ac4df24 | 2011-03-22 23:00:04 +0000 | [diff] [blame] | 2224 | if (!DS.isMissingDeclaratorOk()) { |
Douglas Gregor | 21282df | 2009-01-22 16:23:54 +0000 | [diff] [blame] | 2225 | // Warn about typedefs of enums without names, since this is an |
Douglas Gregor | a0ebd60 | 2010-07-16 15:40:40 +0000 | [diff] [blame] | 2226 | // extension in both Microsoft and GNU. |
Douglas Gregor | 8158f69 | 2009-01-17 02:55:50 +0000 | [diff] [blame] | 2227 | if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef && |
| 2228 | Tag && isa<EnumDecl>(Tag)) { |
Douglas Gregor | a0ebd60 | 2010-07-16 15:40:40 +0000 | [diff] [blame] | 2229 | Diag(DS.getSourceRange().getBegin(), diag::ext_typedef_without_a_name) |
| 2230 | << DS.getSourceRange(); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2231 | return Tag; |
Douglas Gregor | ee159c1 | 2009-01-13 23:10:51 +0000 | [diff] [blame] | 2232 | } |
| 2233 | |
Douglas Gregor | cb821d0 | 2010-04-08 21:33:23 +0000 | [diff] [blame] | 2234 | Diag(DS.getSourceRange().getBegin(), diag::ext_no_declarators) |
Sebastian Redl | a4ed0d8 | 2008-12-28 15:28:59 +0000 | [diff] [blame] | 2235 | << DS.getSourceRange(); |
John McCall | ac4df24 | 2011-03-22 23:00:04 +0000 | [diff] [blame] | 2236 | emittedWarning = true; |
Sebastian Redl | a4ed0d8 | 2008-12-28 15:28:59 +0000 | [diff] [blame] | 2237 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2238 | |
John McCall | ac4df24 | 2011-03-22 23:00:04 +0000 | [diff] [blame] | 2239 | // We're going to complain about a bunch of spurious specifiers; |
| 2240 | // only do this if we're declaring a tag, because otherwise we |
| 2241 | // should be getting diag::ext_no_declarators. |
| 2242 | if (emittedWarning || (TagD && TagD->isInvalidDecl())) |
| 2243 | return TagD; |
| 2244 | |
John McCall | 379246d | 2011-03-26 02:09:52 +0000 | [diff] [blame] | 2245 | // Note that a linkage-specification sets a storage class, but |
| 2246 | // 'extern "C" struct foo;' is actually valid and not theoretically |
| 2247 | // useless. |
John McCall | ac4df24 | 2011-03-22 23:00:04 +0000 | [diff] [blame] | 2248 | if (DeclSpec::SCS scs = DS.getStorageClassSpec()) |
John McCall | 379246d | 2011-03-26 02:09:52 +0000 | [diff] [blame] | 2249 | if (!DS.isExternInLinkageSpec()) |
| 2250 | Diag(DS.getStorageClassSpecLoc(), diag::warn_standalone_specifier) |
| 2251 | << DeclSpec::getSpecifierName(scs); |
| 2252 | |
John McCall | ac4df24 | 2011-03-22 23:00:04 +0000 | [diff] [blame] | 2253 | if (DS.isThreadSpecified()) |
| 2254 | Diag(DS.getThreadSpecLoc(), diag::warn_standalone_specifier) << "__thread"; |
| 2255 | if (DS.getTypeQualifiers()) { |
| 2256 | if (DS.getTypeQualifiers() & DeclSpec::TQ_const) |
| 2257 | Diag(DS.getConstSpecLoc(), diag::warn_standalone_specifier) << "const"; |
| 2258 | if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile) |
| 2259 | Diag(DS.getConstSpecLoc(), diag::warn_standalone_specifier) << "volatile"; |
| 2260 | // Restrict is covered above. |
| 2261 | } |
| 2262 | if (DS.isInlineSpecified()) |
| 2263 | Diag(DS.getInlineSpecLoc(), diag::warn_standalone_specifier) << "inline"; |
| 2264 | if (DS.isVirtualSpecified()) |
| 2265 | Diag(DS.getVirtualSpecLoc(), diag::warn_standalone_specifier) << "virtual"; |
| 2266 | if (DS.isExplicitSpecified()) |
| 2267 | Diag(DS.getExplicitSpecLoc(), diag::warn_standalone_specifier) <<"explicit"; |
| 2268 | |
| 2269 | // FIXME: Warn on useless attributes |
| 2270 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2271 | return TagD; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2272 | } |
| 2273 | |
Fariborz Jahanian | c5be7b0 | 2010-09-28 20:42:35 +0000 | [diff] [blame] | 2274 | /// ActOnVlaStmt - This rouine if finds a vla expression in a decl spec. |
| 2275 | /// builds a statement for it and returns it so it is evaluated. |
| 2276 | StmtResult Sema::ActOnVlaStmt(const DeclSpec &DS) { |
| 2277 | StmtResult R; |
| 2278 | if (DS.getTypeSpecType() == DeclSpec::TST_typeofExpr) { |
| 2279 | Expr *Exp = DS.getRepAsExpr(); |
| 2280 | QualType Ty = Exp->getType(); |
| 2281 | if (Ty->isPointerType()) { |
| 2282 | do |
| 2283 | Ty = Ty->getAs<PointerType>()->getPointeeType(); |
| 2284 | while (Ty->isPointerType()); |
| 2285 | } |
| 2286 | if (Ty->isVariableArrayType()) { |
| 2287 | R = ActOnExprStmt(MakeFullExpr(Exp)); |
| 2288 | } |
| 2289 | } |
| 2290 | return R; |
| 2291 | } |
| 2292 | |
John McCall | 1d7c528 | 2009-12-18 10:40:03 +0000 | [diff] [blame] | 2293 | /// We are trying to inject an anonymous member into the given scope; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2294 | /// check if there's an existing declaration that can't be overloaded. |
| 2295 | /// |
| 2296 | /// \return true if this is a forbidden redeclaration |
John McCall | 1d7c528 | 2009-12-18 10:40:03 +0000 | [diff] [blame] | 2297 | static bool CheckAnonMemberRedeclaration(Sema &SemaRef, |
| 2298 | Scope *S, |
Fariborz Jahanian | 588a4ad | 2010-01-22 18:30:17 +0000 | [diff] [blame] | 2299 | DeclContext *Owner, |
John McCall | 1d7c528 | 2009-12-18 10:40:03 +0000 | [diff] [blame] | 2300 | DeclarationName Name, |
| 2301 | SourceLocation NameLoc, |
| 2302 | unsigned diagnostic) { |
| 2303 | LookupResult R(SemaRef, Name, NameLoc, Sema::LookupMemberName, |
| 2304 | Sema::ForRedeclaration); |
| 2305 | if (!SemaRef.LookupName(R, S)) return false; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2306 | |
John McCall | 1d7c528 | 2009-12-18 10:40:03 +0000 | [diff] [blame] | 2307 | if (R.getAsSingle<TagDecl>()) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2308 | return false; |
| 2309 | |
| 2310 | // Pick a representative declaration. |
John McCall | 1d7c528 | 2009-12-18 10:40:03 +0000 | [diff] [blame] | 2311 | NamedDecl *PrevDecl = R.getRepresentativeDecl()->getUnderlyingDecl(); |
Argyrios Kyrtzidis | 2b64239 | 2010-09-23 14:26:01 +0000 | [diff] [blame] | 2312 | assert(PrevDecl && "Expected a non-null Decl"); |
| 2313 | |
| 2314 | if (!SemaRef.isDeclInScope(PrevDecl, Owner, S)) |
| 2315 | return false; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2316 | |
John McCall | 1d7c528 | 2009-12-18 10:40:03 +0000 | [diff] [blame] | 2317 | SemaRef.Diag(NameLoc, diagnostic) << Name; |
| 2318 | SemaRef.Diag(PrevDecl->getLocation(), diag::note_previous_declaration); |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2319 | |
| 2320 | return true; |
| 2321 | } |
| 2322 | |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2323 | /// InjectAnonymousStructOrUnionMembers - Inject the members of the |
| 2324 | /// anonymous struct or union AnonRecord into the owning context Owner |
| 2325 | /// and scope S. This routine will be invoked just after we realize |
| 2326 | /// that an unnamed union or struct is actually an anonymous union or |
| 2327 | /// struct, e.g., |
| 2328 | /// |
| 2329 | /// @code |
| 2330 | /// union { |
| 2331 | /// int i; |
| 2332 | /// float f; |
| 2333 | /// }; // InjectAnonymousStructOrUnionMembers called here to inject i and |
| 2334 | /// // f into the surrounding scope.x |
| 2335 | /// @endcode |
| 2336 | /// |
| 2337 | /// This routine is recursive, injecting the names of nested anonymous |
| 2338 | /// structs/unions into the owning context and scope as well. |
John McCall | aec0371 | 2010-05-21 20:45:30 +0000 | [diff] [blame] | 2339 | static bool InjectAnonymousStructOrUnionMembers(Sema &SemaRef, Scope *S, |
| 2340 | DeclContext *Owner, |
| 2341 | RecordDecl *AnonRecord, |
Francois Pichet | 87c2e12 | 2010-11-21 06:08:52 +0000 | [diff] [blame] | 2342 | AccessSpecifier AS, |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 2343 | llvm::SmallVector<NamedDecl*, 2> &Chaining, |
| 2344 | bool MSAnonStruct) { |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2345 | unsigned diagKind |
| 2346 | = AnonRecord->isUnion() ? diag::err_anonymous_union_member_redecl |
| 2347 | : diag::err_anonymous_struct_member_redecl; |
| 2348 | |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2349 | bool Invalid = false; |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 2350 | |
| 2351 | // Look every FieldDecl and IndirectFieldDecl with a name. |
| 2352 | for (RecordDecl::decl_iterator D = AnonRecord->decls_begin(), |
| 2353 | DEnd = AnonRecord->decls_end(); |
| 2354 | D != DEnd; ++D) { |
| 2355 | if ((isa<FieldDecl>(*D) || isa<IndirectFieldDecl>(*D)) && |
| 2356 | cast<NamedDecl>(*D)->getDeclName()) { |
| 2357 | ValueDecl *VD = cast<ValueDecl>(*D); |
| 2358 | if (CheckAnonMemberRedeclaration(SemaRef, S, Owner, VD->getDeclName(), |
| 2359 | VD->getLocation(), diagKind)) { |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2360 | // C++ [class.union]p2: |
| 2361 | // The names of the members of an anonymous union shall be |
| 2362 | // distinct from the names of any other entity in the |
| 2363 | // scope in which the anonymous union is declared. |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2364 | Invalid = true; |
| 2365 | } else { |
| 2366 | // C++ [class.union]p2: |
| 2367 | // For the purpose of name lookup, after the anonymous union |
| 2368 | // definition, the members of the anonymous union are |
| 2369 | // considered to have been defined in the scope in which the |
| 2370 | // anonymous union is declared. |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 2371 | unsigned OldChainingSize = Chaining.size(); |
| 2372 | if (IndirectFieldDecl *IF = dyn_cast<IndirectFieldDecl>(VD)) |
| 2373 | for (IndirectFieldDecl::chain_iterator PI = IF->chain_begin(), |
| 2374 | PE = IF->chain_end(); PI != PE; ++PI) |
| 2375 | Chaining.push_back(*PI); |
| 2376 | else |
| 2377 | Chaining.push_back(VD); |
| 2378 | |
Francois Pichet | 87c2e12 | 2010-11-21 06:08:52 +0000 | [diff] [blame] | 2379 | assert(Chaining.size() >= 2); |
| 2380 | NamedDecl **NamedChain = |
| 2381 | new (SemaRef.Context)NamedDecl*[Chaining.size()]; |
| 2382 | for (unsigned i = 0; i < Chaining.size(); i++) |
| 2383 | NamedChain[i] = Chaining[i]; |
| 2384 | |
| 2385 | IndirectFieldDecl* IndirectField = |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 2386 | IndirectFieldDecl::Create(SemaRef.Context, Owner, VD->getLocation(), |
| 2387 | VD->getIdentifier(), VD->getType(), |
Francois Pichet | 87c2e12 | 2010-11-21 06:08:52 +0000 | [diff] [blame] | 2388 | NamedChain, Chaining.size()); |
| 2389 | |
| 2390 | IndirectField->setAccess(AS); |
| 2391 | IndirectField->setImplicit(); |
| 2392 | SemaRef.PushOnScopeChains(IndirectField, S); |
John McCall | aec0371 | 2010-05-21 20:45:30 +0000 | [diff] [blame] | 2393 | |
| 2394 | // That includes picking up the appropriate access specifier. |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 2395 | if (AS != AS_none) IndirectField->setAccess(AS); |
Francois Pichet | 87c2e12 | 2010-11-21 06:08:52 +0000 | [diff] [blame] | 2396 | |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 2397 | Chaining.resize(OldChainingSize); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2398 | } |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2399 | } |
| 2400 | } |
| 2401 | |
| 2402 | return Invalid; |
| 2403 | } |
| 2404 | |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 2405 | /// StorageClassSpecToVarDeclStorageClass - Maps a DeclSpec::SCS to |
| 2406 | /// a VarDecl::StorageClass. Any error reporting is up to the caller: |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 2407 | /// illegal input values are mapped to SC_None. |
| 2408 | static StorageClass |
Abramo Bagnara | 35f9a19 | 2010-07-30 16:47:02 +0000 | [diff] [blame] | 2409 | StorageClassSpecToVarDeclStorageClass(DeclSpec::SCS StorageClassSpec) { |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 2410 | switch (StorageClassSpec) { |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 2411 | case DeclSpec::SCS_unspecified: return SC_None; |
| 2412 | case DeclSpec::SCS_extern: return SC_Extern; |
| 2413 | case DeclSpec::SCS_static: return SC_Static; |
| 2414 | case DeclSpec::SCS_auto: return SC_Auto; |
| 2415 | case DeclSpec::SCS_register: return SC_Register; |
| 2416 | case DeclSpec::SCS_private_extern: return SC_PrivateExtern; |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 2417 | // Illegal SCSs map to None: error reporting is up to the caller. |
| 2418 | case DeclSpec::SCS_mutable: // Fall through. |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 2419 | case DeclSpec::SCS_typedef: return SC_None; |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 2420 | } |
| 2421 | llvm_unreachable("unknown storage class specifier"); |
| 2422 | } |
| 2423 | |
| 2424 | /// StorageClassSpecToFunctionDeclStorageClass - Maps a DeclSpec::SCS to |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 2425 | /// a StorageClass. Any error reporting is up to the caller: |
| 2426 | /// illegal input values are mapped to SC_None. |
| 2427 | static StorageClass |
Abramo Bagnara | 35f9a19 | 2010-07-30 16:47:02 +0000 | [diff] [blame] | 2428 | StorageClassSpecToFunctionDeclStorageClass(DeclSpec::SCS StorageClassSpec) { |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 2429 | switch (StorageClassSpec) { |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 2430 | case DeclSpec::SCS_unspecified: return SC_None; |
| 2431 | case DeclSpec::SCS_extern: return SC_Extern; |
| 2432 | case DeclSpec::SCS_static: return SC_Static; |
| 2433 | case DeclSpec::SCS_private_extern: return SC_PrivateExtern; |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 2434 | // Illegal SCSs map to None: error reporting is up to the caller. |
| 2435 | case DeclSpec::SCS_auto: // Fall through. |
| 2436 | case DeclSpec::SCS_mutable: // Fall through. |
| 2437 | case DeclSpec::SCS_register: // Fall through. |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 2438 | case DeclSpec::SCS_typedef: return SC_None; |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 2439 | } |
| 2440 | llvm_unreachable("unknown storage class specifier"); |
| 2441 | } |
| 2442 | |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 2443 | /// BuildAnonymousStructOrUnion - Handle the declaration of an |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2444 | /// anonymous structure or union. Anonymous unions are a C++ feature |
| 2445 | /// (C++ [class.union]) and a GNU C extension; anonymous structures |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2446 | /// are a GNU C and GNU C++ extension. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2447 | Decl *Sema::BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, |
| 2448 | AccessSpecifier AS, |
| 2449 | RecordDecl *Record) { |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2450 | DeclContext *Owner = Record->getDeclContext(); |
| 2451 | |
| 2452 | // Diagnose whether this anonymous struct/union is an extension. |
| 2453 | if (Record->isUnion() && !getLangOptions().CPlusPlus) |
| 2454 | Diag(Record->getLocation(), diag::ext_anonymous_union); |
| 2455 | else if (!Record->isUnion()) |
| 2456 | Diag(Record->getLocation(), diag::ext_anonymous_struct); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2457 | |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2458 | // C and C++ require different kinds of checks for anonymous |
| 2459 | // structs/unions. |
| 2460 | bool Invalid = false; |
| 2461 | if (getLangOptions().CPlusPlus) { |
| 2462 | const char* PrevSpec = 0; |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 2463 | unsigned DiagID; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2464 | // C++ [class.union]p3: |
| 2465 | // Anonymous unions declared in a named namespace or in the |
| 2466 | // global namespace shall be declared static. |
| 2467 | if (DS.getStorageClassSpec() != DeclSpec::SCS_static && |
| 2468 | (isa<TranslationUnitDecl>(Owner) || |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2469 | (isa<NamespaceDecl>(Owner) && |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2470 | cast<NamespaceDecl>(Owner)->getDeclName()))) { |
| 2471 | Diag(Record->getLocation(), diag::err_anonymous_union_not_static); |
| 2472 | Invalid = true; |
| 2473 | |
| 2474 | // Recover by adding 'static'. |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 2475 | DS.SetStorageClassSpec(DeclSpec::SCS_static, SourceLocation(), |
Peter Collingbourne | e2f82f7 | 2011-02-11 19:59:54 +0000 | [diff] [blame] | 2476 | PrevSpec, DiagID, getLangOptions()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2477 | } |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2478 | // C++ [class.union]p3: |
| 2479 | // A storage class is not allowed in a declaration of an |
| 2480 | // anonymous union in a class scope. |
| 2481 | else if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified && |
| 2482 | isa<RecordDecl>(Owner)) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2483 | Diag(DS.getStorageClassSpecLoc(), |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2484 | diag::err_anonymous_union_with_storage_spec); |
| 2485 | Invalid = true; |
| 2486 | |
| 2487 | // Recover by removing the storage specifier. |
| 2488 | DS.SetStorageClassSpec(DeclSpec::SCS_unspecified, SourceLocation(), |
Peter Collingbourne | e2f82f7 | 2011-02-11 19:59:54 +0000 | [diff] [blame] | 2489 | PrevSpec, DiagID, getLangOptions()); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2490 | } |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2491 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2492 | // C++ [class.union]p2: |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2493 | // The member-specification of an anonymous union shall only |
| 2494 | // define non-static data members. [Note: nested types and |
| 2495 | // functions cannot be declared within an anonymous union. ] |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 2496 | for (DeclContext::decl_iterator Mem = Record->decls_begin(), |
| 2497 | MemEnd = Record->decls_end(); |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2498 | Mem != MemEnd; ++Mem) { |
| 2499 | if (FieldDecl *FD = dyn_cast<FieldDecl>(*Mem)) { |
| 2500 | // C++ [class.union]p3: |
| 2501 | // An anonymous union shall not have private or protected |
| 2502 | // members (clause 11). |
John McCall | aec0371 | 2010-05-21 20:45:30 +0000 | [diff] [blame] | 2503 | assert(FD->getAccess() != AS_none); |
| 2504 | if (FD->getAccess() != AS_public) { |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2505 | Diag(FD->getLocation(), diag::err_anonymous_record_nonpublic_member) |
| 2506 | << (int)Record->isUnion() << (int)(FD->getAccess() == AS_protected); |
| 2507 | Invalid = true; |
| 2508 | } |
Argyrios Kyrtzidis | dd7744d | 2010-08-16 17:27:08 +0000 | [diff] [blame] | 2509 | |
| 2510 | if (CheckNontrivialField(FD)) |
| 2511 | Invalid = true; |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2512 | } else if ((*Mem)->isImplicit()) { |
| 2513 | // Any implicit members are fine. |
Douglas Gregor | 1931b44 | 2009-02-03 00:34:39 +0000 | [diff] [blame] | 2514 | } else if (isa<TagDecl>(*Mem) && (*Mem)->getDeclContext() != Record) { |
| 2515 | // This is a type that showed up in an |
| 2516 | // elaborated-type-specifier inside the anonymous struct or |
| 2517 | // union, but which actually declares a type outside of the |
| 2518 | // anonymous struct or union. It's okay. |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2519 | } else if (RecordDecl *MemRecord = dyn_cast<RecordDecl>(*Mem)) { |
| 2520 | if (!MemRecord->isAnonymousStructOrUnion() && |
| 2521 | MemRecord->getDeclName()) { |
Francois Pichet | 538e0d0 | 2010-09-08 11:32:25 +0000 | [diff] [blame] | 2522 | // Visual C++ allows type definition in anonymous struct or union. |
| 2523 | if (getLangOptions().Microsoft) |
| 2524 | Diag(MemRecord->getLocation(), diag::ext_anonymous_record_with_type) |
| 2525 | << (int)Record->isUnion(); |
| 2526 | else { |
| 2527 | // This is a nested type declaration. |
| 2528 | Diag(MemRecord->getLocation(), diag::err_anonymous_record_with_type) |
| 2529 | << (int)Record->isUnion(); |
| 2530 | Invalid = true; |
| 2531 | } |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2532 | } |
Abramo Bagnara | 6206d53 | 2010-06-05 05:09:32 +0000 | [diff] [blame] | 2533 | } else if (isa<AccessSpecDecl>(*Mem)) { |
| 2534 | // Any access specifier is fine. |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2535 | } else { |
| 2536 | // We have something that isn't a non-static data |
| 2537 | // member. Complain about it. |
| 2538 | unsigned DK = diag::err_anonymous_record_bad_member; |
| 2539 | if (isa<TypeDecl>(*Mem)) |
| 2540 | DK = diag::err_anonymous_record_with_type; |
| 2541 | else if (isa<FunctionDecl>(*Mem)) |
| 2542 | DK = diag::err_anonymous_record_with_function; |
| 2543 | else if (isa<VarDecl>(*Mem)) |
| 2544 | DK = diag::err_anonymous_record_with_static; |
Francois Pichet | 538e0d0 | 2010-09-08 11:32:25 +0000 | [diff] [blame] | 2545 | |
| 2546 | // Visual C++ allows type definition in anonymous struct or union. |
| 2547 | if (getLangOptions().Microsoft && |
| 2548 | DK == diag::err_anonymous_record_with_type) |
| 2549 | Diag((*Mem)->getLocation(), diag::ext_anonymous_record_with_type) |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2550 | << (int)Record->isUnion(); |
Francois Pichet | 538e0d0 | 2010-09-08 11:32:25 +0000 | [diff] [blame] | 2551 | else { |
| 2552 | Diag((*Mem)->getLocation(), DK) |
| 2553 | << (int)Record->isUnion(); |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2554 | Invalid = true; |
Francois Pichet | 538e0d0 | 2010-09-08 11:32:25 +0000 | [diff] [blame] | 2555 | } |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2556 | } |
| 2557 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2558 | } |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2559 | |
| 2560 | if (!Record->isUnion() && !Owner->isRecord()) { |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 2561 | Diag(Record->getLocation(), diag::err_anonymous_struct_not_member) |
| 2562 | << (int)getLangOptions().CPlusPlus; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2563 | Invalid = true; |
| 2564 | } |
| 2565 | |
John McCall | eb692e0 | 2009-10-22 23:31:08 +0000 | [diff] [blame] | 2566 | // Mock up a declarator. |
| 2567 | Declarator Dc(DS, Declarator::TypeNameContext); |
John McCall | bf1a028 | 2010-06-04 23:28:52 +0000 | [diff] [blame] | 2568 | TypeSourceInfo *TInfo = GetTypeForDeclarator(Dc, S); |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2569 | assert(TInfo && "couldn't build declarator info for anonymous struct/union"); |
John McCall | eb692e0 | 2009-10-22 23:31:08 +0000 | [diff] [blame] | 2570 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2571 | // Create a declaration for this anonymous struct/union. |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 2572 | NamedDecl *Anon = 0; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2573 | if (RecordDecl *OwningClass = dyn_cast<RecordDecl>(Owner)) { |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 2574 | Anon = FieldDecl::Create(Context, OwningClass, |
| 2575 | DS.getSourceRange().getBegin(), |
| 2576 | Record->getLocation(), |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2577 | /*IdentifierInfo=*/0, |
Argyrios Kyrtzidis | a5d8200 | 2009-08-21 00:31:54 +0000 | [diff] [blame] | 2578 | Context.getTypeDeclType(Record), |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2579 | TInfo, |
Argyrios Kyrtzidis | a5d8200 | 2009-08-21 00:31:54 +0000 | [diff] [blame] | 2580 | /*BitWidth=*/0, /*Mutable=*/false); |
John McCall | aec0371 | 2010-05-21 20:45:30 +0000 | [diff] [blame] | 2581 | Anon->setAccess(AS); |
Douglas Gregor | 2cf9d65 | 2010-09-28 20:38:10 +0000 | [diff] [blame] | 2582 | if (getLangOptions().CPlusPlus) |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2583 | FieldCollector->Add(cast<FieldDecl>(Anon)); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2584 | } else { |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 2585 | DeclSpec::SCS SCSpec = DS.getStorageClassSpec(); |
| 2586 | assert(SCSpec != DeclSpec::SCS_typedef && |
| 2587 | "Parser allowed 'typedef' as storage class VarDecl."); |
Abramo Bagnara | 35f9a19 | 2010-07-30 16:47:02 +0000 | [diff] [blame] | 2588 | VarDecl::StorageClass SC = StorageClassSpecToVarDeclStorageClass(SCSpec); |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 2589 | if (SCSpec == DeclSpec::SCS_mutable) { |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2590 | // mutable can only appear on non-static class members, so it's always |
| 2591 | // an error here |
| 2592 | Diag(Record->getLocation(), diag::err_mutable_nonmember); |
| 2593 | Invalid = true; |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 2594 | SC = SC_None; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2595 | } |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 2596 | SCSpec = DS.getStorageClassSpecAsWritten(); |
| 2597 | VarDecl::StorageClass SCAsWritten |
Abramo Bagnara | 35f9a19 | 2010-07-30 16:47:02 +0000 | [diff] [blame] | 2598 | = StorageClassSpecToVarDeclStorageClass(SCSpec); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2599 | |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 2600 | Anon = VarDecl::Create(Context, Owner, |
| 2601 | DS.getSourceRange().getBegin(), |
| 2602 | Record->getLocation(), /*IdentifierInfo=*/0, |
Argyrios Kyrtzidis | a5d8200 | 2009-08-21 00:31:54 +0000 | [diff] [blame] | 2603 | Context.getTypeDeclType(Record), |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 2604 | TInfo, SC, SCAsWritten); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2605 | } |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2606 | Anon->setImplicit(); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2607 | |
| 2608 | // Add the anonymous struct/union object to the current |
| 2609 | // context. We'll be referencing this object when we refer to one of |
| 2610 | // its members. |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 2611 | Owner->addDecl(Anon); |
Douglas Gregor | fe60f84 | 2010-05-03 15:18:25 +0000 | [diff] [blame] | 2612 | |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2613 | // Inject the members of the anonymous struct/union into the owning |
| 2614 | // context and into the identifier resolver chain for name lookup |
| 2615 | // purposes. |
Francois Pichet | 87c2e12 | 2010-11-21 06:08:52 +0000 | [diff] [blame] | 2616 | llvm::SmallVector<NamedDecl*, 2> Chain; |
| 2617 | Chain.push_back(Anon); |
| 2618 | |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 2619 | if (InjectAnonymousStructOrUnionMembers(*this, S, Owner, Record, AS, |
| 2620 | Chain, false)) |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 2621 | Invalid = true; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2622 | |
| 2623 | // Mark this as an anonymous struct/union type. Note that we do not |
| 2624 | // do this until after we have already checked and injected the |
| 2625 | // members of this anonymous struct/union type, because otherwise |
| 2626 | // the members could be injected twice: once by DeclContext when it |
| 2627 | // builds its lookup table, and once by |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2628 | // InjectAnonymousStructOrUnionMembers. |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2629 | Record->setAnonymousStructOrUnion(true); |
| 2630 | |
| 2631 | if (Invalid) |
| 2632 | Anon->setInvalidDecl(); |
| 2633 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2634 | return Anon; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 2635 | } |
| 2636 | |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 2637 | /// BuildMicrosoftCAnonymousStruct - Handle the declaration of an |
| 2638 | /// Microsoft C anonymous structure. |
| 2639 | /// Ref: http://msdn.microsoft.com/en-us/library/z2cx9y4f.aspx |
| 2640 | /// Example: |
| 2641 | /// |
| 2642 | /// struct A { int a; }; |
| 2643 | /// struct B { struct A; int b; }; |
| 2644 | /// |
| 2645 | /// void foo() { |
| 2646 | /// B var; |
| 2647 | /// var.a = 3; |
| 2648 | /// } |
| 2649 | /// |
| 2650 | Decl *Sema::BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, |
| 2651 | RecordDecl *Record) { |
| 2652 | |
| 2653 | // If there is no Record, get the record via the typedef. |
| 2654 | if (!Record) |
| 2655 | Record = DS.getRepAsType().get()->getAsStructureType()->getDecl(); |
| 2656 | |
| 2657 | // Mock up a declarator. |
| 2658 | Declarator Dc(DS, Declarator::TypeNameContext); |
| 2659 | TypeSourceInfo *TInfo = GetTypeForDeclarator(Dc, S); |
| 2660 | assert(TInfo && "couldn't build declarator info for anonymous struct"); |
| 2661 | |
| 2662 | // Create a declaration for this anonymous struct. |
| 2663 | NamedDecl* Anon = FieldDecl::Create(Context, |
| 2664 | cast<RecordDecl>(CurContext), |
| 2665 | DS.getSourceRange().getBegin(), |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 2666 | DS.getSourceRange().getBegin(), |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 2667 | /*IdentifierInfo=*/0, |
| 2668 | Context.getTypeDeclType(Record), |
| 2669 | TInfo, |
| 2670 | /*BitWidth=*/0, /*Mutable=*/false); |
| 2671 | Anon->setImplicit(); |
| 2672 | |
| 2673 | // Add the anonymous struct object to the current context. |
| 2674 | CurContext->addDecl(Anon); |
| 2675 | |
| 2676 | // Inject the members of the anonymous struct into the current |
| 2677 | // context and into the identifier resolver chain for name lookup |
| 2678 | // purposes. |
| 2679 | llvm::SmallVector<NamedDecl*, 2> Chain; |
| 2680 | Chain.push_back(Anon); |
| 2681 | |
| 2682 | if (InjectAnonymousStructOrUnionMembers(*this, S, CurContext, |
| 2683 | Record->getDefinition(), |
| 2684 | AS_none, Chain, true)) |
| 2685 | Anon->setInvalidDecl(); |
| 2686 | |
| 2687 | return Anon; |
| 2688 | } |
Steve Naroff | f009063 | 2007-09-02 02:04:30 +0000 | [diff] [blame] | 2689 | |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 2690 | /// GetNameForDeclarator - Determine the full declaration name for the |
| 2691 | /// given Declarator. |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2692 | DeclarationNameInfo Sema::GetNameForDeclarator(Declarator &D) { |
Douglas Gregor | 02a24ee | 2009-11-03 16:56:39 +0000 | [diff] [blame] | 2693 | return GetNameFromUnqualifiedId(D.getName()); |
| 2694 | } |
| 2695 | |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2696 | /// \brief Retrieves the declaration name from a parsed unqualified-id. |
| 2697 | DeclarationNameInfo |
| 2698 | Sema::GetNameFromUnqualifiedId(const UnqualifiedId &Name) { |
| 2699 | DeclarationNameInfo NameInfo; |
| 2700 | NameInfo.setLoc(Name.StartLocation); |
| 2701 | |
Douglas Gregor | 3f9a056 | 2009-11-03 01:35:08 +0000 | [diff] [blame] | 2702 | switch (Name.getKind()) { |
Sean Hunt | 0486d74 | 2009-11-28 04:44:28 +0000 | [diff] [blame] | 2703 | |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2704 | case UnqualifiedId::IK_Identifier: |
| 2705 | NameInfo.setName(Name.Identifier); |
| 2706 | NameInfo.setLoc(Name.StartLocation); |
| 2707 | return NameInfo; |
Sean Hunt | 0486d74 | 2009-11-28 04:44:28 +0000 | [diff] [blame] | 2708 | |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2709 | case UnqualifiedId::IK_OperatorFunctionId: |
| 2710 | NameInfo.setName(Context.DeclarationNames.getCXXOperatorName( |
| 2711 | Name.OperatorFunctionId.Operator)); |
| 2712 | NameInfo.setLoc(Name.StartLocation); |
| 2713 | NameInfo.getInfo().CXXOperatorName.BeginOpNameLoc |
| 2714 | = Name.OperatorFunctionId.SymbolLocations[0]; |
| 2715 | NameInfo.getInfo().CXXOperatorName.EndOpNameLoc |
| 2716 | = Name.EndLocation.getRawEncoding(); |
| 2717 | return NameInfo; |
Douglas Gregor | 0efc2c1 | 2010-01-13 17:31:36 +0000 | [diff] [blame] | 2718 | |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2719 | case UnqualifiedId::IK_LiteralOperatorId: |
| 2720 | NameInfo.setName(Context.DeclarationNames.getCXXLiteralOperatorName( |
| 2721 | Name.Identifier)); |
| 2722 | NameInfo.setLoc(Name.StartLocation); |
| 2723 | NameInfo.setCXXLiteralOperatorNameLoc(Name.EndLocation); |
| 2724 | return NameInfo; |
Douglas Gregor | 0efc2c1 | 2010-01-13 17:31:36 +0000 | [diff] [blame] | 2725 | |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2726 | case UnqualifiedId::IK_ConversionFunctionId: { |
| 2727 | TypeSourceInfo *TInfo; |
| 2728 | QualType Ty = GetTypeFromParser(Name.ConversionFunctionId, &TInfo); |
| 2729 | if (Ty.isNull()) |
| 2730 | return DeclarationNameInfo(); |
| 2731 | NameInfo.setName(Context.DeclarationNames.getCXXConversionFunctionName( |
| 2732 | Context.getCanonicalType(Ty))); |
| 2733 | NameInfo.setLoc(Name.StartLocation); |
| 2734 | NameInfo.setNamedTypeInfo(TInfo); |
| 2735 | return NameInfo; |
Douglas Gregor | db422df | 2009-09-25 21:45:23 +0000 | [diff] [blame] | 2736 | } |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2737 | |
| 2738 | case UnqualifiedId::IK_ConstructorName: { |
| 2739 | TypeSourceInfo *TInfo; |
| 2740 | QualType Ty = GetTypeFromParser(Name.ConstructorName, &TInfo); |
| 2741 | if (Ty.isNull()) |
| 2742 | return DeclarationNameInfo(); |
| 2743 | NameInfo.setName(Context.DeclarationNames.getCXXConstructorName( |
| 2744 | Context.getCanonicalType(Ty))); |
| 2745 | NameInfo.setLoc(Name.StartLocation); |
| 2746 | NameInfo.setNamedTypeInfo(TInfo); |
| 2747 | return NameInfo; |
| 2748 | } |
| 2749 | |
| 2750 | case UnqualifiedId::IK_ConstructorTemplateId: { |
| 2751 | // In well-formed code, we can only have a constructor |
| 2752 | // template-id that refers to the current context, so go there |
| 2753 | // to find the actual type being constructed. |
| 2754 | CXXRecordDecl *CurClass = dyn_cast<CXXRecordDecl>(CurContext); |
| 2755 | if (!CurClass || CurClass->getIdentifier() != Name.TemplateId->Name) |
| 2756 | return DeclarationNameInfo(); |
| 2757 | |
| 2758 | // Determine the type of the class being constructed. |
| 2759 | QualType CurClassType = Context.getTypeDeclType(CurClass); |
| 2760 | |
| 2761 | // FIXME: Check two things: that the template-id names the same type as |
| 2762 | // CurClassType, and that the template-id does not occur when the name |
| 2763 | // was qualified. |
| 2764 | |
| 2765 | NameInfo.setName(Context.DeclarationNames.getCXXConstructorName( |
| 2766 | Context.getCanonicalType(CurClassType))); |
| 2767 | NameInfo.setLoc(Name.StartLocation); |
| 2768 | // FIXME: should we retrieve TypeSourceInfo? |
| 2769 | NameInfo.setNamedTypeInfo(0); |
| 2770 | return NameInfo; |
| 2771 | } |
| 2772 | |
| 2773 | case UnqualifiedId::IK_DestructorName: { |
| 2774 | TypeSourceInfo *TInfo; |
| 2775 | QualType Ty = GetTypeFromParser(Name.DestructorName, &TInfo); |
| 2776 | if (Ty.isNull()) |
| 2777 | return DeclarationNameInfo(); |
| 2778 | NameInfo.setName(Context.DeclarationNames.getCXXDestructorName( |
| 2779 | Context.getCanonicalType(Ty))); |
| 2780 | NameInfo.setLoc(Name.StartLocation); |
| 2781 | NameInfo.setNamedTypeInfo(TInfo); |
| 2782 | return NameInfo; |
| 2783 | } |
| 2784 | |
| 2785 | case UnqualifiedId::IK_TemplateId: { |
John McCall | 2b5289b | 2010-08-23 07:28:44 +0000 | [diff] [blame] | 2786 | TemplateName TName = Name.TemplateId->Template.get(); |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2787 | SourceLocation TNameLoc = Name.TemplateId->TemplateNameLoc; |
| 2788 | return Context.getNameForTemplate(TName, TNameLoc); |
| 2789 | } |
| 2790 | |
| 2791 | } // switch (Name.getKind()) |
| 2792 | |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 2793 | assert(false && "Unknown name kind"); |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2794 | return DeclarationNameInfo(); |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 2795 | } |
| 2796 | |
Douglas Gregor | 4ce205f | 2009-02-06 17:46:57 +0000 | [diff] [blame] | 2797 | /// isNearlyMatchingFunction - Determine whether the C++ functions |
| 2798 | /// Declaration and Definition are "nearly" matching. This heuristic |
| 2799 | /// is used to improve diagnostics in the case where an out-of-line |
| 2800 | /// function definition doesn't match any declaration within |
| 2801 | /// the class or namespace. |
| 2802 | static bool isNearlyMatchingFunction(ASTContext &Context, |
| 2803 | FunctionDecl *Declaration, |
| 2804 | FunctionDecl *Definition) { |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 2805 | if (Declaration->param_size() != Definition->param_size()) |
| 2806 | return false; |
| 2807 | for (unsigned Idx = 0; Idx < Declaration->param_size(); ++Idx) { |
| 2808 | QualType DeclParamTy = Declaration->getParamDecl(Idx)->getType(); |
| 2809 | QualType DefParamTy = Definition->getParamDecl(Idx)->getType(); |
| 2810 | |
Douglas Gregor | a4923eb | 2009-11-16 21:35:15 +0000 | [diff] [blame] | 2811 | if (!Context.hasSameUnqualifiedType(DeclParamTy.getNonReferenceType(), |
| 2812 | DefParamTy.getNonReferenceType())) |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 2813 | return false; |
| 2814 | } |
| 2815 | |
| 2816 | return true; |
| 2817 | } |
| 2818 | |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2819 | /// NeedsRebuildingInCurrentInstantiation - Checks whether the given |
| 2820 | /// declarator needs to be rebuilt in the current instantiation. |
| 2821 | /// Any bits of declarator which appear before the name are valid for |
| 2822 | /// consideration here. That's specifically the type in the decl spec |
| 2823 | /// and the base type in any member-pointer chunks. |
| 2824 | static bool RebuildDeclaratorInCurrentInstantiation(Sema &S, Declarator &D, |
| 2825 | DeclarationName Name) { |
| 2826 | // The types we specifically need to rebuild are: |
| 2827 | // - typenames, typeofs, and decltypes |
| 2828 | // - types which will become injected class names |
| 2829 | // Of course, we also need to rebuild any type referencing such a |
| 2830 | // type. It's safest to just say "dependent", but we call out a |
| 2831 | // few cases here. |
| 2832 | |
| 2833 | DeclSpec &DS = D.getMutableDeclSpec(); |
| 2834 | switch (DS.getTypeSpecType()) { |
| 2835 | case DeclSpec::TST_typename: |
| 2836 | case DeclSpec::TST_typeofType: |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2837 | case DeclSpec::TST_decltype: { |
| 2838 | // Grab the type from the parser. |
| 2839 | TypeSourceInfo *TSI = 0; |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 2840 | QualType T = S.GetTypeFromParser(DS.getRepAsType(), &TSI); |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2841 | if (T.isNull() || !T->isDependentType()) break; |
| 2842 | |
| 2843 | // Make sure there's a type source info. This isn't really much |
| 2844 | // of a waste; most dependent types should have type source info |
| 2845 | // attached already. |
| 2846 | if (!TSI) |
| 2847 | TSI = S.Context.getTrivialTypeSourceInfo(T, DS.getTypeSpecTypeLoc()); |
| 2848 | |
| 2849 | // Rebuild the type in the current instantiation. |
| 2850 | TSI = S.RebuildTypeInCurrentInstantiation(TSI, D.getIdentifierLoc(), Name); |
| 2851 | if (!TSI) return true; |
| 2852 | |
| 2853 | // Store the new type back in the decl spec. |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 2854 | ParsedType LocType = S.CreateParsedType(TSI->getType(), TSI); |
| 2855 | DS.UpdateTypeRep(LocType); |
| 2856 | break; |
| 2857 | } |
| 2858 | |
| 2859 | case DeclSpec::TST_typeofExpr: { |
| 2860 | Expr *E = DS.getRepAsExpr(); |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 2861 | ExprResult Result = S.RebuildExprInCurrentInstantiation(E); |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 2862 | if (Result.isInvalid()) return true; |
| 2863 | DS.UpdateExprRep(Result.get()); |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2864 | break; |
| 2865 | } |
| 2866 | |
| 2867 | default: |
| 2868 | // Nothing to do for these decl specs. |
| 2869 | break; |
| 2870 | } |
| 2871 | |
| 2872 | // It doesn't matter what order we do this in. |
| 2873 | for (unsigned I = 0, E = D.getNumTypeObjects(); I != E; ++I) { |
| 2874 | DeclaratorChunk &Chunk = D.getTypeObject(I); |
| 2875 | |
| 2876 | // The only type information in the declarator which can come |
| 2877 | // before the declaration name is the base type of a member |
| 2878 | // pointer. |
| 2879 | if (Chunk.Kind != DeclaratorChunk::MemberPointer) |
| 2880 | continue; |
| 2881 | |
| 2882 | // Rebuild the scope specifier in-place. |
| 2883 | CXXScopeSpec &SS = Chunk.Mem.Scope(); |
| 2884 | if (S.RebuildNestedNameSpecifierInCurrentInstantiation(SS)) |
| 2885 | return true; |
| 2886 | } |
| 2887 | |
| 2888 | return false; |
| 2889 | } |
| 2890 | |
John McCall | 7cd088e | 2010-08-24 07:21:54 +0000 | [diff] [blame] | 2891 | Decl *Sema::ActOnDeclarator(Scope *S, Declarator &D) { |
| 2892 | return HandleDeclarator(S, D, MultiTemplateParamsArg(*this), false); |
| 2893 | } |
| 2894 | |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 2895 | /// DiagnoseClassNameShadow - Implement C++ [class.mem]p13: |
| 2896 | /// If T is the name of a class, then each of the following shall have a |
| 2897 | /// name different from T: |
| 2898 | /// - every static data member of class T; |
| 2899 | /// - every member function of class T |
| 2900 | /// - every member of class T that is itself a type; |
| 2901 | /// \returns true if the declaration name violates these rules. |
| 2902 | bool Sema::DiagnoseClassNameShadow(DeclContext *DC, |
| 2903 | DeclarationNameInfo NameInfo) { |
| 2904 | DeclarationName Name = NameInfo.getName(); |
| 2905 | |
| 2906 | if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(DC)) |
| 2907 | if (Record->getIdentifier() && Record->getDeclName() == Name) { |
| 2908 | Diag(NameInfo.getLoc(), diag::err_member_name_of_class) << Name; |
| 2909 | return true; |
| 2910 | } |
| 2911 | |
| 2912 | return false; |
| 2913 | } |
| 2914 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2915 | Decl *Sema::HandleDeclarator(Scope *S, Declarator &D, |
| 2916 | MultiTemplateParamsArg TemplateParamLists, |
Sean Hunt | fe2695e | 2011-05-06 01:42:00 +0000 | [diff] [blame] | 2917 | bool IsFunctionDefinition, |
| 2918 | SourceLocation DefLoc) { |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2919 | // TODO: consider using NameInfo for diagnostic. |
| 2920 | DeclarationNameInfo NameInfo = GetNameForDeclarator(D); |
| 2921 | DeclarationName Name = NameInfo.getName(); |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 2922 | |
Chris Lattner | e80a59c | 2007-07-25 00:24:17 +0000 | [diff] [blame] | 2923 | // All of these full declarators require an identifier. If it doesn't have |
| 2924 | // one, the ParsedFreeStandingDeclSpec action should be used. |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 2925 | if (!Name) { |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2926 | if (!D.isInvalidType()) // Reject this if we think it is valid. |
Chris Lattner | 1f6f54b | 2008-11-11 06:13:16 +0000 | [diff] [blame] | 2927 | Diag(D.getDeclSpec().getSourceRange().getBegin(), |
Chris Lattner | fa25bbb | 2008-11-19 05:08:23 +0000 | [diff] [blame] | 2928 | diag::err_declarator_need_ident) |
| 2929 | << D.getDeclSpec().getSourceRange() << D.getSourceRange(); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2930 | return 0; |
Douglas Gregor | 56c0458 | 2010-12-16 00:46:58 +0000 | [diff] [blame] | 2931 | } else if (DiagnoseUnexpandedParameterPack(NameInfo, UPPC_DeclarationType)) |
| 2932 | return 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2933 | |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 2934 | // The scope passed in may not be a decl scope. Zip up the scope tree until |
| 2935 | // we find one that is. |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 2936 | while ((S->getFlags() & Scope::DeclScope) == 0 || |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 2937 | (S->getFlags() & Scope::TemplateParamScope) != 0) |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 2938 | S = S->getParent(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2939 | |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2940 | DeclContext *DC = CurContext; |
| 2941 | if (D.getCXXScopeSpec().isInvalid()) |
| 2942 | D.setInvalidType(); |
| 2943 | else if (D.getCXXScopeSpec().isSet()) { |
Douglas Gregor | 6ccab97 | 2010-12-16 01:14:37 +0000 | [diff] [blame] | 2944 | if (DiagnoseUnexpandedParameterPack(D.getCXXScopeSpec(), |
| 2945 | UPPC_DeclarationQualifier)) |
| 2946 | return 0; |
| 2947 | |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2948 | bool EnteringContext = !D.getDeclSpec().isFriendSpecified(); |
| 2949 | DC = computeDeclContext(D.getCXXScopeSpec(), EnteringContext); |
| 2950 | if (!DC) { |
| 2951 | // If we could not compute the declaration context, it's because the |
| 2952 | // declaration context is dependent but does not refer to a class, |
| 2953 | // class template, or class template partial specialization. Complain |
| 2954 | // and return early, to avoid the coming semantic disaster. |
| 2955 | Diag(D.getIdentifierLoc(), |
| 2956 | diag::err_template_qualified_declarator_no_match) |
| 2957 | << (NestedNameSpecifier*)D.getCXXScopeSpec().getScopeRep() |
| 2958 | << D.getCXXScopeSpec().getRange(); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2959 | return 0; |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2960 | } |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2961 | bool IsDependentContext = DC->isDependentContext(); |
John McCall | 0dd7ceb | 2009-12-19 09:35:56 +0000 | [diff] [blame] | 2962 | |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2963 | if (!IsDependentContext && |
John McCall | 77bb1aa | 2010-05-01 00:40:08 +0000 | [diff] [blame] | 2964 | RequireCompleteDeclContext(D.getCXXScopeSpec(), DC)) |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2965 | return 0; |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2966 | |
Douglas Gregor | 922fff2 | 2010-10-13 22:19:53 +0000 | [diff] [blame] | 2967 | if (isa<CXXRecordDecl>(DC)) { |
| 2968 | if (!cast<CXXRecordDecl>(DC)->hasDefinition()) { |
| 2969 | Diag(D.getIdentifierLoc(), |
| 2970 | diag::err_member_def_undefined_record) |
| 2971 | << Name << DC << D.getCXXScopeSpec().getRange(); |
| 2972 | D.setInvalidType(); |
| 2973 | } else if (isa<CXXRecordDecl>(CurContext) && |
| 2974 | !D.getDeclSpec().isFriendSpecified()) { |
| 2975 | // The user provided a superfluous scope specifier inside a class |
| 2976 | // definition: |
| 2977 | // |
| 2978 | // class X { |
| 2979 | // void X::f(); |
| 2980 | // }; |
| 2981 | if (CurContext->Equals(DC)) |
| 2982 | Diag(D.getIdentifierLoc(), diag::warn_member_extra_qualification) |
| 2983 | << Name << FixItHint::CreateRemoval(D.getCXXScopeSpec().getRange()); |
| 2984 | else |
| 2985 | Diag(D.getIdentifierLoc(), diag::err_member_qualification) |
| 2986 | << Name << D.getCXXScopeSpec().getRange(); |
| 2987 | |
| 2988 | // Pretend that this qualifier was not here. |
| 2989 | D.getCXXScopeSpec().clear(); |
| 2990 | } |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2991 | } |
| 2992 | |
| 2993 | // Check whether we need to rebuild the type of the given |
| 2994 | // declaration in the current instantiation. |
| 2995 | if (EnteringContext && IsDependentContext && |
| 2996 | TemplateParamLists.size() != 0) { |
| 2997 | ContextRAII SavedContext(*this, DC); |
| 2998 | if (RebuildDeclaratorInCurrentInstantiation(*this, D, Name)) |
| 2999 | D.setInvalidType(); |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 3000 | } |
| 3001 | } |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 3002 | |
| 3003 | if (DiagnoseClassNameShadow(DC, NameInfo)) |
| 3004 | // If this is a typedef, we'll end up spewing multiple diagnostics. |
| 3005 | // Just return early; it's safer. |
| 3006 | if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) |
| 3007 | return 0; |
Douglas Gregor | a6e937c | 2010-10-15 13:21:21 +0000 | [diff] [blame] | 3008 | |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 3009 | NamedDecl *New; |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 3010 | |
John McCall | bf1a028 | 2010-06-04 23:28:52 +0000 | [diff] [blame] | 3011 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); |
| 3012 | QualType R = TInfo->getType(); |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 3013 | |
Douglas Gregor | d093722 | 2010-12-13 22:49:22 +0000 | [diff] [blame] | 3014 | if (DiagnoseUnexpandedParameterPack(D.getIdentifierLoc(), TInfo, |
| 3015 | UPPC_DeclarationType)) |
| 3016 | D.setInvalidType(); |
| 3017 | |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 3018 | LookupResult Previous(*this, NameInfo, LookupOrdinaryName, |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3019 | ForRedeclaration); |
| 3020 | |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 3021 | // See if this is a redefinition of a variable in the same scope. |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 3022 | if (!D.getCXXScopeSpec().isSet()) { |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3023 | bool IsLinkageLookup = false; |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 3024 | |
| 3025 | // If the declaration we're planning to build will be a function |
| 3026 | // or object with linkage, then look for another declaration with |
| 3027 | // linkage (C99 6.2.2p4-5 and C++ [basic.link]p6). |
| 3028 | if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) |
| 3029 | /* Do nothing*/; |
| 3030 | else if (R->isFunctionType()) { |
Douglas Gregor | 6bec78d | 2009-07-07 17:00:05 +0000 | [diff] [blame] | 3031 | if (CurContext->isFunctionOrMethod() || |
| 3032 | D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_static) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3033 | IsLinkageLookup = true; |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 3034 | } else if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_extern) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3035 | IsLinkageLookup = true; |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 3036 | else if (CurContext->getRedeclContext()->isTranslationUnit() && |
Douglas Gregor | 6bec78d | 2009-07-07 17:00:05 +0000 | [diff] [blame] | 3037 | D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_static) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3038 | IsLinkageLookup = true; |
| 3039 | |
| 3040 | if (IsLinkageLookup) |
| 3041 | Previous.clear(LookupRedeclarationWithLinkage); |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 3042 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3043 | LookupName(Previous, S, /* CreateBuiltins = */ IsLinkageLookup); |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 3044 | } else { // Something like "int foo::x;" |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3045 | LookupQualifiedName(Previous, DC); |
| 3046 | |
| 3047 | // Don't consider using declarations as previous declarations for |
| 3048 | // out-of-line members. |
| 3049 | RemoveUsingDecls(Previous); |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 3050 | |
| 3051 | // C++ 7.3.1.2p2: |
| 3052 | // Members (including explicit specializations of templates) of a named |
| 3053 | // namespace can also be defined outside that namespace by explicit |
| 3054 | // qualification of the name being defined, provided that the entity being |
| 3055 | // defined was already declared in the namespace and the definition appears |
| 3056 | // after the point of declaration in a namespace that encloses the |
| 3057 | // declarations namespace. |
| 3058 | // |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 3059 | // Note that we only check the context at this point. We don't yet |
| 3060 | // have enough information to make sure that PrevDecl is actually |
| 3061 | // the declaration we want to match. For example, given: |
| 3062 | // |
Douglas Gregor | 9d35097 | 2008-12-12 08:25:50 +0000 | [diff] [blame] | 3063 | // class X { |
| 3064 | // void f(); |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 3065 | // void f(float); |
Douglas Gregor | 9d35097 | 2008-12-12 08:25:50 +0000 | [diff] [blame] | 3066 | // }; |
| 3067 | // |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 3068 | // void X::f(int) { } // ill-formed |
| 3069 | // |
| 3070 | // In this case, PrevDecl will point to the overload set |
| 3071 | // containing the two f's declared in X, but neither of them |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3072 | // matches. |
Douglas Gregor | 4ce205f | 2009-02-06 17:46:57 +0000 | [diff] [blame] | 3073 | |
| 3074 | // First check whether we named the global scope. |
| 3075 | if (isa<TranslationUnitDecl>(DC)) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3076 | Diag(D.getIdentifierLoc(), diag::err_invalid_declarator_global_scope) |
Douglas Gregor | 4ce205f | 2009-02-06 17:46:57 +0000 | [diff] [blame] | 3077 | << Name << D.getCXXScopeSpec().getRange(); |
Sebastian Redl | 9770ef0 | 2009-11-08 11:36:54 +0000 | [diff] [blame] | 3078 | } else { |
| 3079 | DeclContext *Cur = CurContext; |
| 3080 | while (isa<LinkageSpecDecl>(Cur)) |
| 3081 | Cur = Cur->getParent(); |
| 3082 | if (!Cur->Encloses(DC)) { |
| 3083 | // The qualifying scope doesn't enclose the original declaration. |
| 3084 | // Emit diagnostic based on current scope. |
| 3085 | SourceLocation L = D.getIdentifierLoc(); |
| 3086 | SourceRange R = D.getCXXScopeSpec().getRange(); |
| 3087 | if (isa<FunctionDecl>(Cur)) |
| 3088 | Diag(L, diag::err_invalid_declarator_in_function) << Name << R; |
| 3089 | else |
| 3090 | Diag(L, diag::err_invalid_declarator_scope) |
| 3091 | << Name << cast<NamedDecl>(DC) << R; |
| 3092 | D.setInvalidType(); |
| 3093 | } |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 3094 | } |
| 3095 | } |
| 3096 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3097 | if (Previous.isSingleResult() && |
| 3098 | Previous.getFoundDecl()->isTemplateParameter()) { |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 3099 | // Maybe we will complain about the shadowed template parameter. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3100 | if (!D.isInvalidType()) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3101 | if (DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), |
| 3102 | Previous.getFoundDecl())) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3103 | D.setInvalidType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3104 | |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 3105 | // Just pretend that we didn't see the previous declaration. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3106 | Previous.clear(); |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 3107 | } |
| 3108 | |
Douglas Gregor | 2ce52f3 | 2008-04-13 21:07:44 +0000 | [diff] [blame] | 3109 | // In C++, the previous declaration we find might be a tag type |
| 3110 | // (class or enum). In this case, the new declaration will hide the |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 3111 | // tag type. Note that this does does not apply if we're declaring a |
| 3112 | // typedef (C++ [dcl.typedef]p4). |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3113 | if (Previous.isSingleTagDecl() && |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 3114 | D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3115 | Previous.clear(); |
Douglas Gregor | 2ce52f3 | 2008-04-13 21:07:44 +0000 | [diff] [blame] | 3116 | |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 3117 | bool Redeclaration = false; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3118 | if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) { |
Sean Hunt | fe2695e | 2011-05-06 01:42:00 +0000 | [diff] [blame] | 3119 | if (DefLoc.isValid()) |
| 3120 | Diag(DefLoc, diag::err_default_special_members); |
| 3121 | |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 3122 | if (TemplateParamLists.size()) { |
| 3123 | Diag(D.getIdentifierLoc(), diag::err_template_typedef); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 3124 | return 0; |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 3125 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3126 | |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 3127 | New = ActOnTypedefDeclarator(S, D, DC, R, TInfo, Previous, Redeclaration); |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 3128 | } else if (R->isFunctionType()) { |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 3129 | New = ActOnFunctionDeclarator(S, D, DC, R, TInfo, Previous, |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 3130 | move(TemplateParamLists), |
Sean Hunt | fe2695e | 2011-05-06 01:42:00 +0000 | [diff] [blame] | 3131 | IsFunctionDefinition, Redeclaration, DefLoc); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3132 | } else { |
Sean Hunt | fe2695e | 2011-05-06 01:42:00 +0000 | [diff] [blame] | 3133 | assert(!DefLoc.isValid() && "We should have caught this in a caller"); |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 3134 | New = ActOnVariableDeclarator(S, D, DC, R, TInfo, Previous, |
Douglas Gregor | dfe3f2d | 2009-07-22 17:18:37 +0000 | [diff] [blame] | 3135 | move(TemplateParamLists), |
| 3136 | Redeclaration); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3137 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3138 | |
| 3139 | if (New == 0) |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 3140 | return 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3141 | |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 3142 | // If this has an identifier and is not an invalid redeclaration or |
| 3143 | // function template specialization, add it to the scope stack. |
Douglas Gregor | f178dca | 2010-07-24 00:10:38 +0000 | [diff] [blame] | 3144 | if (New->getDeclName() && !(Redeclaration && New->isInvalidDecl())) |
Argyrios Kyrtzidis | 87f3ff0 | 2008-04-12 00:47:19 +0000 | [diff] [blame] | 3145 | PushOnScopeChains(New, S); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3146 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 3147 | return New; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3148 | } |
| 3149 | |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 3150 | /// TryToFixInvalidVariablyModifiedType - Helper method to turn variable array |
| 3151 | /// types into constant array types in certain situations which would otherwise |
| 3152 | /// be errors (for GCC compatibility). |
| 3153 | static QualType TryToFixInvalidVariablyModifiedType(QualType T, |
| 3154 | ASTContext &Context, |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 3155 | bool &SizeIsNegative, |
| 3156 | llvm::APSInt &Oversized) { |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 3157 | // This method tries to turn a variable array into a constant |
| 3158 | // array even when the size isn't an ICE. This is necessary |
| 3159 | // for compatibility with code that depends on gcc's buggy |
| 3160 | // constant expression folding, like struct {char x[(int)(char*)2];} |
| 3161 | SizeIsNegative = false; |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 3162 | Oversized = 0; |
| 3163 | |
| 3164 | if (T->isDependentType()) |
| 3165 | return QualType(); |
| 3166 | |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 3167 | QualifierCollector Qs; |
| 3168 | const Type *Ty = Qs.strip(T); |
| 3169 | |
| 3170 | if (const PointerType* PTy = dyn_cast<PointerType>(Ty)) { |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 3171 | QualType Pointee = PTy->getPointeeType(); |
| 3172 | QualType FixedType = |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 3173 | TryToFixInvalidVariablyModifiedType(Pointee, Context, SizeIsNegative, |
| 3174 | Oversized); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 3175 | if (FixedType.isNull()) return FixedType; |
Eli Friedman | 61125c8 | 2009-02-21 00:58:02 +0000 | [diff] [blame] | 3176 | FixedType = Context.getPointerType(FixedType); |
John McCall | 49f4e1c | 2010-12-10 11:01:00 +0000 | [diff] [blame] | 3177 | return Qs.apply(Context, FixedType); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 3178 | } |
Abramo Bagnara | 075f8f1 | 2010-12-10 16:29:40 +0000 | [diff] [blame] | 3179 | if (const ParenType* PTy = dyn_cast<ParenType>(Ty)) { |
| 3180 | QualType Inner = PTy->getInnerType(); |
| 3181 | QualType FixedType = |
| 3182 | TryToFixInvalidVariablyModifiedType(Inner, Context, SizeIsNegative, |
| 3183 | Oversized); |
| 3184 | if (FixedType.isNull()) return FixedType; |
| 3185 | FixedType = Context.getParenType(FixedType); |
| 3186 | return Qs.apply(Context, FixedType); |
| 3187 | } |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 3188 | |
| 3189 | const VariableArrayType* VLATy = dyn_cast<VariableArrayType>(T); |
Eli Friedman | bc592e6 | 2009-02-26 03:58:54 +0000 | [diff] [blame] | 3190 | if (!VLATy) |
| 3191 | return QualType(); |
| 3192 | // FIXME: We should probably handle this case |
| 3193 | if (VLATy->getElementType()->isVariablyModifiedType()) |
| 3194 | return QualType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3195 | |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 3196 | Expr::EvalResult EvalResult; |
| 3197 | if (!VLATy->getSizeExpr() || |
Eli Friedman | bc592e6 | 2009-02-26 03:58:54 +0000 | [diff] [blame] | 3198 | !VLATy->getSizeExpr()->Evaluate(EvalResult, Context) || |
| 3199 | !EvalResult.Val.isInt()) |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 3200 | return QualType(); |
Eli Friedman | bc592e6 | 2009-02-26 03:58:54 +0000 | [diff] [blame] | 3201 | |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 3202 | // Check whether the array size is negative. |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 3203 | llvm::APSInt &Res = EvalResult.Val.getInt(); |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 3204 | if (Res.isSigned() && Res.isNegative()) { |
| 3205 | SizeIsNegative = true; |
| 3206 | return QualType(); |
Douglas Gregor | 7e7eb3d | 2009-07-06 15:59:29 +0000 | [diff] [blame] | 3207 | } |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 3208 | |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 3209 | // Check whether the array is too large to be addressed. |
| 3210 | unsigned ActiveSizeBits |
| 3211 | = ConstantArrayType::getNumAddressingBits(Context, VLATy->getElementType(), |
| 3212 | Res); |
| 3213 | if (ActiveSizeBits > ConstantArrayType::getMaxSizeBits(Context)) { |
| 3214 | Oversized = Res; |
| 3215 | return QualType(); |
| 3216 | } |
| 3217 | |
| 3218 | return Context.getConstantArrayType(VLATy->getElementType(), |
| 3219 | Res, ArrayType::Normal, 0); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 3220 | } |
| 3221 | |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 3222 | /// \brief Register the given locally-scoped external C declaration so |
| 3223 | /// that it can be found later for redeclarations |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3224 | void |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3225 | Sema::RegisterLocallyScopedExternCDecl(NamedDecl *ND, |
| 3226 | const LookupResult &Previous, |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 3227 | Scope *S) { |
| 3228 | assert(ND->getLexicalDeclContext()->isFunctionOrMethod() && |
| 3229 | "Decl is not a locally-scoped decl!"); |
| 3230 | // Note that we have a locally-scoped external with this name. |
| 3231 | LocallyScopedExternalDecls[ND->getDeclName()] = ND; |
| 3232 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3233 | if (!Previous.isSingleResult()) |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 3234 | return; |
| 3235 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3236 | NamedDecl *PrevDecl = Previous.getFoundDecl(); |
| 3237 | |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 3238 | // If there was a previous declaration of this variable, it may be |
| 3239 | // in our identifier chain. Update the identifier chain with the new |
| 3240 | // declaration. |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3241 | if (S && IdResolver.ReplaceDecl(PrevDecl, ND)) { |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 3242 | // The previous declaration was found on the identifer resolver |
| 3243 | // chain, so remove it from its scope. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 3244 | while (S && !S->isDeclScope(PrevDecl)) |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 3245 | S = S->getParent(); |
| 3246 | |
| 3247 | if (S) |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 3248 | S->RemoveDecl(PrevDecl); |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 3249 | } |
| 3250 | } |
| 3251 | |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 3252 | /// \brief Diagnose function specifiers on a declaration of an identifier that |
| 3253 | /// does not identify a function. |
| 3254 | void Sema::DiagnoseFunctionSpecifiers(Declarator& D) { |
| 3255 | // FIXME: We should probably indicate the identifier in question to avoid |
| 3256 | // confusion for constructs like "inline int a(), b;" |
| 3257 | if (D.getDeclSpec().isInlineSpecified()) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3258 | Diag(D.getDeclSpec().getInlineSpecLoc(), |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 3259 | diag::err_inline_non_function); |
| 3260 | |
| 3261 | if (D.getDeclSpec().isVirtualSpecified()) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3262 | Diag(D.getDeclSpec().getVirtualSpecLoc(), |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 3263 | diag::err_virtual_non_function); |
| 3264 | |
| 3265 | if (D.getDeclSpec().isExplicitSpecified()) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3266 | Diag(D.getDeclSpec().getExplicitSpecLoc(), |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 3267 | diag::err_explicit_non_function); |
| 3268 | } |
| 3269 | |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 3270 | NamedDecl* |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 3271 | Sema::ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 3272 | QualType R, TypeSourceInfo *TInfo, |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3273 | LookupResult &Previous, bool &Redeclaration) { |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 3274 | // Typedef declarators cannot be qualified (C++ [dcl.meaning]p1). |
| 3275 | if (D.getCXXScopeSpec().isSet()) { |
| 3276 | Diag(D.getIdentifierLoc(), diag::err_qualified_typedef_declarator) |
| 3277 | << D.getCXXScopeSpec().getRange(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3278 | D.setInvalidType(); |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 3279 | // Pretend we didn't see the scope specifier. |
Douglas Gregor | 9de672f | 2010-03-23 15:26:55 +0000 | [diff] [blame] | 3280 | DC = CurContext; |
| 3281 | Previous.clear(); |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 3282 | } |
| 3283 | |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 3284 | if (getLangOptions().CPlusPlus) { |
| 3285 | // Check that there are no default arguments (C++ only). |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 3286 | CheckExtraCXXDefaultArguments(D); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 3287 | } |
| 3288 | |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 3289 | DiagnoseFunctionSpecifiers(D); |
| 3290 | |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 3291 | if (D.getDeclSpec().isThreadSpecified()) |
| 3292 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_invalid_thread); |
| 3293 | |
Douglas Gregor | aef0199 | 2010-07-13 06:37:01 +0000 | [diff] [blame] | 3294 | if (D.getName().Kind != UnqualifiedId::IK_Identifier) { |
| 3295 | Diag(D.getName().StartLocation, diag::err_typedef_not_identifier) |
| 3296 | << D.getName().getSourceRange(); |
| 3297 | return 0; |
| 3298 | } |
| 3299 | |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 3300 | TypedefDecl *NewTD = ParseTypedefDecl(S, D, R, TInfo); |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 3301 | if (!NewTD) return 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3302 | |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 3303 | // Handle attributes prior to checking for duplicates in MergeVarDecl |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 3304 | ProcessDeclAttributes(S, NewTD, D); |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3305 | |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 3306 | CheckTypedefForVariablyModifiedType(S, NewTD); |
| 3307 | |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 3308 | return ActOnTypedefNameDecl(S, DC, NewTD, Previous, Redeclaration); |
| 3309 | } |
| 3310 | |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 3311 | void |
| 3312 | Sema::CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *NewTD) { |
Chris Lattner | 38c5ebd | 2009-04-19 05:21:20 +0000 | [diff] [blame] | 3313 | // C99 6.7.7p2: If a typedef name specifies a variably modified type |
| 3314 | // then it shall have block scope. |
Eli Friedman | bf87f2c | 2010-08-10 03:13:15 +0000 | [diff] [blame] | 3315 | // Note that variably modified types must be fixed before merging the decl so |
| 3316 | // that redeclarations will match. |
Chris Lattner | 38c5ebd | 2009-04-19 05:21:20 +0000 | [diff] [blame] | 3317 | QualType T = NewTD->getUnderlyingType(); |
| 3318 | if (T->isVariablyModifiedType()) { |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 3319 | getCurFunction()->setHasBranchProtectedScope(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3320 | |
Chris Lattner | 38c5ebd | 2009-04-19 05:21:20 +0000 | [diff] [blame] | 3321 | if (S->getFnParent() == 0) { |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 3322 | bool SizeIsNegative; |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 3323 | llvm::APSInt Oversized; |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 3324 | QualType FixedTy = |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 3325 | TryToFixInvalidVariablyModifiedType(T, Context, SizeIsNegative, |
| 3326 | Oversized); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 3327 | if (!FixedTy.isNull()) { |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 3328 | Diag(NewTD->getLocation(), diag::warn_illegal_constant_array_size); |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 3329 | NewTD->setTypeSourceInfo(Context.getTrivialTypeSourceInfo(FixedTy)); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 3330 | } else { |
| 3331 | if (SizeIsNegative) |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 3332 | Diag(NewTD->getLocation(), diag::err_typecheck_negative_array_size); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 3333 | else if (T->isVariableArrayType()) |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 3334 | Diag(NewTD->getLocation(), diag::err_vla_decl_in_file_scope); |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 3335 | else if (Oversized.getBoolValue()) |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 3336 | Diag(NewTD->getLocation(), diag::err_array_too_large) << Oversized.toString(10); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 3337 | else |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 3338 | Diag(NewTD->getLocation(), diag::err_vm_decl_in_file_scope); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3339 | NewTD->setInvalidDecl(); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 3340 | } |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 3341 | } |
| 3342 | } |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 3343 | } |
Douglas Gregor | c29f77b | 2009-07-07 16:35:42 +0000 | [diff] [blame] | 3344 | |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 3345 | |
| 3346 | /// ActOnTypedefNameDecl - Perform semantic checking for a declaration which |
| 3347 | /// declares a typedef-name, either using the 'typedef' type specifier or via |
| 3348 | /// a C++0x [dcl.typedef]p2 alias-declaration: 'using T = A;'. |
| 3349 | NamedDecl* |
| 3350 | Sema::ActOnTypedefNameDecl(Scope *S, DeclContext *DC, TypedefNameDecl *NewTD, |
| 3351 | LookupResult &Previous, bool &Redeclaration) { |
Eli Friedman | bf87f2c | 2010-08-10 03:13:15 +0000 | [diff] [blame] | 3352 | // Merge the decl with the existing one if appropriate. If the decl is |
| 3353 | // in an outer scope, it isn't the same thing. |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 3354 | FilterLookupForScope(Previous, DC, S, /*ConsiderLinkage*/ false, |
Douglas Gregor | cc20945 | 2011-03-07 16:54:27 +0000 | [diff] [blame] | 3355 | /*ExplicitInstantiationOrSpecialization=*/false); |
Eli Friedman | bf87f2c | 2010-08-10 03:13:15 +0000 | [diff] [blame] | 3356 | if (!Previous.empty()) { |
| 3357 | Redeclaration = true; |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 3358 | MergeTypedefNameDecl(NewTD, Previous); |
Eli Friedman | bf87f2c | 2010-08-10 03:13:15 +0000 | [diff] [blame] | 3359 | } |
| 3360 | |
Douglas Gregor | c29f77b | 2009-07-07 16:35:42 +0000 | [diff] [blame] | 3361 | // If this is the C FILE type, notify the AST context. |
| 3362 | if (IdentifierInfo *II = NewTD->getIdentifier()) |
| 3363 | if (!NewTD->isInvalidDecl() && |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 3364 | NewTD->getDeclContext()->getRedeclContext()->isTranslationUnit()) { |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 3365 | if (II->isStr("FILE")) |
| 3366 | Context.setFILEDecl(NewTD); |
| 3367 | else if (II->isStr("jmp_buf")) |
| 3368 | Context.setjmp_bufDecl(NewTD); |
| 3369 | else if (II->isStr("sigjmp_buf")) |
| 3370 | Context.setsigjmp_bufDecl(NewTD); |
Douglas Gregor | 4a1bb8c | 2010-10-05 15:41:24 +0000 | [diff] [blame] | 3371 | else if (II->isStr("__builtin_va_list")) |
| 3372 | Context.setBuiltinVaListType(Context.getTypedefType(NewTD)); |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 3373 | } |
| 3374 | |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 3375 | return NewTD; |
| 3376 | } |
| 3377 | |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 3378 | /// \brief Determines whether the given declaration is an out-of-scope |
| 3379 | /// previous declaration. |
| 3380 | /// |
| 3381 | /// This routine should be invoked when name lookup has found a |
| 3382 | /// previous declaration (PrevDecl) that is not in the scope where a |
| 3383 | /// new declaration by the same name is being introduced. If the new |
| 3384 | /// declaration occurs in a local scope, previous declarations with |
| 3385 | /// linkage may still be considered previous declarations (C99 |
| 3386 | /// 6.2.2p4-5, C++ [basic.link]p6). |
| 3387 | /// |
| 3388 | /// \param PrevDecl the previous declaration found by name |
| 3389 | /// lookup |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3390 | /// |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 3391 | /// \param DC the context in which the new declaration is being |
| 3392 | /// declared. |
| 3393 | /// |
| 3394 | /// \returns true if PrevDecl is an out-of-scope previous declaration |
| 3395 | /// for a new delcaration with the same name. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3396 | static bool |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 3397 | isOutOfScopePreviousDeclaration(NamedDecl *PrevDecl, DeclContext *DC, |
| 3398 | ASTContext &Context) { |
| 3399 | if (!PrevDecl) |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 3400 | return false; |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 3401 | |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 3402 | if (!PrevDecl->hasLinkage()) |
| 3403 | return false; |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 3404 | |
| 3405 | if (Context.getLangOptions().CPlusPlus) { |
| 3406 | // C++ [basic.link]p6: |
| 3407 | // If there is a visible declaration of an entity with linkage |
| 3408 | // having the same name and type, ignoring entities declared |
| 3409 | // outside the innermost enclosing namespace scope, the block |
| 3410 | // scope declaration declares that same entity and receives the |
| 3411 | // linkage of the previous declaration. |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 3412 | DeclContext *OuterContext = DC->getRedeclContext(); |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 3413 | if (!OuterContext->isFunctionOrMethod()) |
| 3414 | // This rule only applies to block-scope declarations. |
| 3415 | return false; |
Douglas Gregor | 757c600 | 2010-08-27 22:55:10 +0000 | [diff] [blame] | 3416 | |
| 3417 | DeclContext *PrevOuterContext = PrevDecl->getDeclContext(); |
| 3418 | if (PrevOuterContext->isRecord()) |
| 3419 | // We found a member function: ignore it. |
| 3420 | return false; |
| 3421 | |
| 3422 | // Find the innermost enclosing namespace for the new and |
| 3423 | // previous declarations. |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 3424 | OuterContext = OuterContext->getEnclosingNamespaceContext(); |
| 3425 | PrevOuterContext = PrevOuterContext->getEnclosingNamespaceContext(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3426 | |
Douglas Gregor | 757c600 | 2010-08-27 22:55:10 +0000 | [diff] [blame] | 3427 | // The previous declaration is in a different namespace, so it |
| 3428 | // isn't the same function. |
| 3429 | if (!OuterContext->Equals(PrevOuterContext)) |
| 3430 | return false; |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 3431 | } |
| 3432 | |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 3433 | return true; |
| 3434 | } |
| 3435 | |
John McCall | b621766 | 2010-03-15 10:12:16 +0000 | [diff] [blame] | 3436 | static void SetNestedNameSpecifier(DeclaratorDecl *DD, Declarator &D) { |
| 3437 | CXXScopeSpec &SS = D.getCXXScopeSpec(); |
| 3438 | if (!SS.isSet()) return; |
Douglas Gregor | c22b5ff | 2011-02-25 02:25:35 +0000 | [diff] [blame] | 3439 | DD->setQualifierInfo(SS.getWithLocInContext(DD->getASTContext())); |
John McCall | b621766 | 2010-03-15 10:12:16 +0000 | [diff] [blame] | 3440 | } |
| 3441 | |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 3442 | NamedDecl* |
Chris Lattner | 16c5dea | 2010-10-10 18:16:20 +0000 | [diff] [blame] | 3443 | Sema::ActOnVariableDeclarator(Scope *S, Declarator &D, DeclContext *DC, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 3444 | QualType R, TypeSourceInfo *TInfo, |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3445 | LookupResult &Previous, |
Douglas Gregor | dfe3f2d | 2009-07-22 17:18:37 +0000 | [diff] [blame] | 3446 | MultiTemplateParamsArg TemplateParamLists, |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 3447 | bool &Redeclaration) { |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 3448 | DeclarationName Name = GetNameForDeclarator(D).getName(); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3449 | |
| 3450 | // Check that there are no default arguments (C++ only). |
| 3451 | if (getLangOptions().CPlusPlus) |
| 3452 | CheckExtraCXXDefaultArguments(D); |
| 3453 | |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 3454 | DeclSpec::SCS SCSpec = D.getDeclSpec().getStorageClassSpec(); |
| 3455 | assert(SCSpec != DeclSpec::SCS_typedef && |
| 3456 | "Parser allowed 'typedef' as storage class VarDecl."); |
Abramo Bagnara | 35f9a19 | 2010-07-30 16:47:02 +0000 | [diff] [blame] | 3457 | VarDecl::StorageClass SC = StorageClassSpecToVarDeclStorageClass(SCSpec); |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 3458 | if (SCSpec == DeclSpec::SCS_mutable) { |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3459 | // mutable can only appear on non-static class members, so it's always |
| 3460 | // an error here |
| 3461 | Diag(D.getIdentifierLoc(), diag::err_mutable_nonmember); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3462 | D.setInvalidType(); |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 3463 | SC = SC_None; |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3464 | } |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 3465 | SCSpec = D.getDeclSpec().getStorageClassSpecAsWritten(); |
| 3466 | VarDecl::StorageClass SCAsWritten |
Abramo Bagnara | 35f9a19 | 2010-07-30 16:47:02 +0000 | [diff] [blame] | 3467 | = StorageClassSpecToVarDeclStorageClass(SCSpec); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3468 | |
| 3469 | IdentifierInfo *II = Name.getAsIdentifierInfo(); |
| 3470 | if (!II) { |
| 3471 | Diag(D.getIdentifierLoc(), diag::err_bad_variable_name) |
| 3472 | << Name.getAsString(); |
| 3473 | return 0; |
| 3474 | } |
| 3475 | |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 3476 | DiagnoseFunctionSpecifiers(D); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 3477 | |
Douglas Gregor | 2d2e9cf | 2009-03-11 20:22:50 +0000 | [diff] [blame] | 3478 | if (!DC->isRecord() && S->getFnParent() == 0) { |
| 3479 | // C99 6.9p2: The storage-class specifiers auto and register shall not |
| 3480 | // appear in the declaration specifiers in an external declaration. |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 3481 | if (SC == SC_Auto || SC == SC_Register) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3482 | |
Chris Lattner | d4b19d5 | 2009-05-12 21:44:00 +0000 | [diff] [blame] | 3483 | // If this is a register variable with an asm label specified, then this |
| 3484 | // is a GNU extension. |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 3485 | if (SC == SC_Register && D.getAsmLabel()) |
Chris Lattner | d4b19d5 | 2009-05-12 21:44:00 +0000 | [diff] [blame] | 3486 | Diag(D.getIdentifierLoc(), diag::err_unsupported_global_register); |
| 3487 | else |
| 3488 | Diag(D.getIdentifierLoc(), diag::err_typecheck_sclass_fscope); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3489 | D.setInvalidType(); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3490 | } |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3491 | } |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3492 | |
Ted Kremenek | 9577abc | 2011-01-23 17:04:59 +0000 | [diff] [blame] | 3493 | bool isExplicitSpecialization = false; |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3494 | VarDecl *NewVD; |
| 3495 | if (!getLangOptions().CPlusPlus) { |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 3496 | NewVD = VarDecl::Create(Context, DC, D.getSourceRange().getBegin(), |
| 3497 | D.getIdentifierLoc(), II, |
| 3498 | R, TInfo, SC, SCAsWritten); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3499 | |
| 3500 | if (D.isInvalidType()) |
| 3501 | NewVD->setInvalidDecl(); |
| 3502 | } else { |
| 3503 | if (DC->isRecord() && !CurContext->isRecord()) { |
| 3504 | // This is an out-of-line definition of a static data member. |
| 3505 | if (SC == SC_Static) { |
| 3506 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), |
| 3507 | diag::err_static_out_of_line) |
| 3508 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); |
| 3509 | } else if (SC == SC_None) |
| 3510 | SC = SC_Static; |
Anders Carlsson | e98da2e | 2009-06-24 00:28:53 +0000 | [diff] [blame] | 3511 | } |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3512 | if (SC == SC_Static) { |
| 3513 | if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(DC)) { |
| 3514 | if (RD->isLocalClass()) |
| 3515 | Diag(D.getIdentifierLoc(), |
| 3516 | diag::err_static_data_member_not_allowed_in_local_class) |
| 3517 | << Name << RD->getDeclName(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3518 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3519 | // C++ [class.union]p1: If a union contains a static data member, |
| 3520 | // the program is ill-formed. |
| 3521 | // |
| 3522 | // We also disallow static data members in anonymous structs. |
| 3523 | if (CurContext->isRecord() && (RD->isUnion() || !RD->getDeclName())) |
| 3524 | Diag(D.getIdentifierLoc(), |
| 3525 | diag::err_static_data_member_not_allowed_in_union_or_anon_struct) |
| 3526 | << Name << RD->isUnion(); |
| 3527 | } |
| 3528 | } |
| 3529 | |
| 3530 | // Match up the template parameter lists with the scope specifier, then |
| 3531 | // determine whether we have a template or a template specialization. |
| 3532 | isExplicitSpecialization = false; |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3533 | bool Invalid = false; |
| 3534 | if (TemplateParameterList *TemplateParams |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 3535 | = MatchTemplateParametersToScopeSpecifier( |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3536 | D.getDeclSpec().getSourceRange().getBegin(), |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 3537 | D.getCXXScopeSpec(), |
John McCall | 9a34edb | 2010-10-19 01:40:49 +0000 | [diff] [blame] | 3538 | TemplateParamLists.get(), |
| 3539 | TemplateParamLists.size(), |
John McCall | 77e8b11 | 2010-04-13 20:37:33 +0000 | [diff] [blame] | 3540 | /*never a friend*/ false, |
Douglas Gregor | 0167f3c | 2010-07-14 23:14:12 +0000 | [diff] [blame] | 3541 | isExplicitSpecialization, |
| 3542 | Invalid)) { |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3543 | if (TemplateParams->size() > 0) { |
| 3544 | // There is no such thing as a variable template. |
| 3545 | Diag(D.getIdentifierLoc(), diag::err_template_variable) |
| 3546 | << II |
| 3547 | << SourceRange(TemplateParams->getTemplateLoc(), |
| 3548 | TemplateParams->getRAngleLoc()); |
| 3549 | return 0; |
| 3550 | } else { |
| 3551 | // There is an extraneous 'template<>' for this variable. Complain |
| 3552 | // about it, but allow the declaration of the variable. |
| 3553 | Diag(TemplateParams->getTemplateLoc(), |
| 3554 | diag::err_template_variable_noparams) |
| 3555 | << II |
| 3556 | << SourceRange(TemplateParams->getTemplateLoc(), |
| 3557 | TemplateParams->getRAngleLoc()); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3558 | isExplicitSpecialization = true; |
| 3559 | } |
Douglas Gregor | dfe3f2d | 2009-07-22 17:18:37 +0000 | [diff] [blame] | 3560 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3561 | |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 3562 | NewVD = VarDecl::Create(Context, DC, D.getSourceRange().getBegin(), |
| 3563 | D.getIdentifierLoc(), II, |
| 3564 | R, TInfo, SC, SCAsWritten); |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 3565 | |
Richard Smith | 483b9f3 | 2011-02-21 20:05:19 +0000 | [diff] [blame] | 3566 | // If this decl has an auto type in need of deduction, make a note of the |
| 3567 | // Decl so we can diagnose uses of it in its own initializer. |
| 3568 | if (D.getDeclSpec().getTypeSpecType() == DeclSpec::TST_auto && |
| 3569 | R->getContainedAutoType()) |
| 3570 | ParsingInitForAutoVars.insert(NewVD); |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 3571 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3572 | if (D.isInvalidType() || Invalid) |
| 3573 | NewVD->setInvalidDecl(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3574 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3575 | SetNestedNameSpecifier(NewVD, D); |
John McCall | b621766 | 2010-03-15 10:12:16 +0000 | [diff] [blame] | 3576 | |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 3577 | if (TemplateParamLists.size() > 0 && D.getCXXScopeSpec().isSet()) { |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3578 | NewVD->setTemplateParameterListsInfo(Context, |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 3579 | TemplateParamLists.size(), |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3580 | TemplateParamLists.release()); |
| 3581 | } |
Abramo Bagnara | 9b93488 | 2010-06-12 08:15:14 +0000 | [diff] [blame] | 3582 | } |
| 3583 | |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 3584 | if (D.getDeclSpec().isThreadSpecified()) { |
| 3585 | if (NewVD->hasLocalStorage()) |
| 3586 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_thread_non_global); |
Eli Friedman | 4fb71b0 | 2009-04-19 21:48:33 +0000 | [diff] [blame] | 3587 | else if (!Context.Target.isTLSSupported()) |
| 3588 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_thread_unsupported); |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 3589 | else |
| 3590 | NewVD->setThreadSpecified(true); |
| 3591 | } |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 3592 | |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 3593 | // Set the lexical context. If the declarator has a C++ scope specifier, the |
| 3594 | // lexical context will be different from the semantic context. |
| 3595 | NewVD->setLexicalDeclContext(CurContext); |
| 3596 | |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3597 | // Handle attributes prior to checking for duplicates in MergeVarDecl |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 3598 | ProcessDeclAttributes(S, NewVD, D); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3599 | |
| 3600 | // Handle GNU asm-label extension (encoded as an attribute). |
Chris Lattner | 16c5dea | 2010-10-10 18:16:20 +0000 | [diff] [blame] | 3601 | if (Expr *E = (Expr*)D.getAsmLabel()) { |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3602 | // The parser guarantees this is a string. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3603 | StringLiteral *SE = cast<StringLiteral>(E); |
Rafael Espindola | baf8695 | 2011-01-01 21:47:03 +0000 | [diff] [blame] | 3604 | llvm::StringRef Label = SE->getString(); |
Abramo Bagnara | 2b57aef | 2011-01-11 15:16:52 +0000 | [diff] [blame] | 3605 | if (S->getFnParent() != 0) { |
| 3606 | switch (SC) { |
| 3607 | case SC_None: |
| 3608 | case SC_Auto: |
| 3609 | Diag(E->getExprLoc(), diag::warn_asm_label_on_auto_decl) << Label; |
| 3610 | break; |
| 3611 | case SC_Register: |
| 3612 | if (!Context.Target.isValidGCCRegisterName(Label)) |
| 3613 | Diag(E->getExprLoc(), diag::err_asm_unknown_register_name) << Label; |
| 3614 | break; |
| 3615 | case SC_Static: |
| 3616 | case SC_Extern: |
| 3617 | case SC_PrivateExtern: |
| 3618 | break; |
| 3619 | } |
| 3620 | } |
| 3621 | |
| 3622 | NewVD->addAttr(::new (Context) AsmLabelAttr(SE->getStrTokenLoc(0), |
Rafael Espindola | baf8695 | 2011-01-01 21:47:03 +0000 | [diff] [blame] | 3623 | Context, Label)); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3624 | } |
| 3625 | |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3626 | // Diagnose shadowed variables before filtering for scope. |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 3627 | if (!D.getCXXScopeSpec().isSet()) |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 3628 | CheckShadow(S, NewVD, Previous); |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3629 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3630 | // Don't consider existing declarations that are in a different |
| 3631 | // scope and are out-of-semantic-context declarations (if the new |
| 3632 | // declaration has linkage). |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 3633 | FilterLookupForScope(Previous, DC, S, NewVD->hasLinkage(), |
Douglas Gregor | cc20945 | 2011-03-07 16:54:27 +0000 | [diff] [blame] | 3634 | isExplicitSpecialization); |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 3635 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3636 | if (!getLangOptions().CPlusPlus) |
| 3637 | CheckVariableDeclaration(NewVD, Previous, Redeclaration); |
| 3638 | else { |
| 3639 | // Merge the decl with the existing one if appropriate. |
| 3640 | if (!Previous.empty()) { |
| 3641 | if (Previous.isSingleResult() && |
| 3642 | isa<FieldDecl>(Previous.getFoundDecl()) && |
| 3643 | D.getCXXScopeSpec().isSet()) { |
| 3644 | // The user tried to define a non-static data member |
| 3645 | // out-of-line (C++ [dcl.meaning]p1). |
| 3646 | Diag(NewVD->getLocation(), diag::err_nonstatic_member_out_of_line) |
| 3647 | << D.getCXXScopeSpec().getRange(); |
| 3648 | Previous.clear(); |
| 3649 | NewVD->setInvalidDecl(); |
| 3650 | } |
| 3651 | } else if (D.getCXXScopeSpec().isSet()) { |
| 3652 | // No previous declaration in the qualifying scope. |
| 3653 | Diag(D.getIdentifierLoc(), diag::err_no_member) |
| 3654 | << Name << computeDeclContext(D.getCXXScopeSpec(), true) |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3655 | << D.getCXXScopeSpec().getRange(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3656 | NewVD->setInvalidDecl(); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3657 | } |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3658 | |
| 3659 | CheckVariableDeclaration(NewVD, Previous, Redeclaration); |
| 3660 | |
| 3661 | // This is an explicit specialization of a static data member. Check it. |
| 3662 | if (isExplicitSpecialization && !NewVD->isInvalidDecl() && |
| 3663 | CheckMemberSpecialization(NewVD, Previous)) |
| 3664 | NewVD->setInvalidDecl(); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3665 | } |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3666 | |
Ryan Flynn | 478fbc6 | 2009-07-25 22:29:44 +0000 | [diff] [blame] | 3667 | // attributes declared post-definition are currently ignored |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 3668 | // FIXME: This should be handled in attribute merging, not |
| 3669 | // here. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3670 | if (Previous.isSingleResult()) { |
Sebastian Redl | 31310a2 | 2010-02-01 20:16:42 +0000 | [diff] [blame] | 3671 | VarDecl *Def = dyn_cast<VarDecl>(Previous.getFoundDecl()); |
| 3672 | if (Def && (Def = Def->getDefinition()) && |
| 3673 | Def != NewVD && D.hasAttributes()) { |
Ryan Flynn | 478fbc6 | 2009-07-25 22:29:44 +0000 | [diff] [blame] | 3674 | Diag(NewVD->getLocation(), diag::warn_attribute_precede_definition); |
| 3675 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 3676 | } |
| 3677 | } |
| 3678 | |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3679 | // If this is a locally-scoped extern C variable, update the map of |
| 3680 | // such variables. |
Douglas Gregor | 48a83b5 | 2009-09-12 00:17:51 +0000 | [diff] [blame] | 3681 | if (CurContext->isFunctionOrMethod() && NewVD->isExternC() && |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3682 | !NewVD->isInvalidDecl()) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3683 | RegisterLocallyScopedExternCDecl(NewVD, Previous, S); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3684 | |
Eli Friedman | aa8b0d1 | 2010-08-05 06:57:20 +0000 | [diff] [blame] | 3685 | // If there's a #pragma GCC visibility in scope, and this isn't a class |
| 3686 | // member, set the visibility of this variable. |
| 3687 | if (NewVD->getLinkage() == ExternalLinkage && !DC->isRecord()) |
| 3688 | AddPushedVisibilityAttribute(NewVD); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3689 | |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 3690 | MarkUnusedFileScopedDecl(NewVD); |
| 3691 | |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3692 | return NewVD; |
| 3693 | } |
| 3694 | |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 3695 | /// \brief Diagnose variable or built-in function shadowing. Implements |
| 3696 | /// -Wshadow. |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3697 | /// |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 3698 | /// This method is called whenever a VarDecl is added to a "useful" |
| 3699 | /// scope. |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3700 | /// |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 3701 | /// \param S the scope in which the shadowing name is being declared |
| 3702 | /// \param R the lookup of the name |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3703 | /// |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 3704 | void Sema::CheckShadow(Scope *S, VarDecl *D, const LookupResult& R) { |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3705 | // Return if warning is ignored. |
Argyrios Kyrtzidis | 0827408 | 2010-12-15 18:44:22 +0000 | [diff] [blame] | 3706 | if (Diags.getDiagnosticLevel(diag::warn_decl_shadow, R.getNameLoc()) == |
| 3707 | Diagnostic::Ignored) |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3708 | return; |
| 3709 | |
Argyrios Kyrtzidis | 651f86f | 2011-02-08 18:21:25 +0000 | [diff] [blame] | 3710 | // Don't diagnose declarations at file scope. |
Argyrios Kyrtzidis | 865dd8c | 2011-04-25 21:39:50 +0000 | [diff] [blame] | 3711 | if (D->hasGlobalStorage()) |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3712 | return; |
Argyrios Kyrtzidis | 865dd8c | 2011-04-25 21:39:50 +0000 | [diff] [blame] | 3713 | |
| 3714 | DeclContext *NewDC = D->getDeclContext(); |
| 3715 | |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 3716 | // Only diagnose if we're shadowing an unambiguous field or variable. |
Douglas Gregor | c48c916 | 2010-03-17 16:03:44 +0000 | [diff] [blame] | 3717 | if (R.getResultKind() != LookupResult::Found) |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3718 | return; |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3719 | |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3720 | NamedDecl* ShadowedDecl = R.getFoundDecl(); |
| 3721 | if (!isa<VarDecl>(ShadowedDecl) && !isa<FieldDecl>(ShadowedDecl)) |
| 3722 | return; |
| 3723 | |
Argyrios Kyrtzidis | 36eb5e4 | 2011-01-31 07:04:54 +0000 | [diff] [blame] | 3724 | // Fields are not shadowed by variables in C++ static methods. |
| 3725 | if (isa<FieldDecl>(ShadowedDecl)) |
| 3726 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(NewDC)) |
| 3727 | if (MD->isStatic()) |
| 3728 | return; |
| 3729 | |
Argyrios Kyrtzidis | 49a6172 | 2011-01-31 07:04:50 +0000 | [diff] [blame] | 3730 | if (VarDecl *shadowedVar = dyn_cast<VarDecl>(ShadowedDecl)) |
| 3731 | if (shadowedVar->isExternC()) { |
Argyrios Kyrtzidis | 49a6172 | 2011-01-31 07:04:50 +0000 | [diff] [blame] | 3732 | // For shadowing external vars, make sure that we point to the global |
| 3733 | // declaration, not a locally scoped extern declaration. |
| 3734 | for (VarDecl::redecl_iterator |
| 3735 | I = shadowedVar->redecls_begin(), E = shadowedVar->redecls_end(); |
| 3736 | I != E; ++I) |
| 3737 | if (I->isFileVarDecl()) { |
| 3738 | ShadowedDecl = *I; |
| 3739 | break; |
| 3740 | } |
| 3741 | } |
| 3742 | |
| 3743 | DeclContext *OldDC = ShadowedDecl->getDeclContext(); |
| 3744 | |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 3745 | // Only warn about certain kinds of shadowing for class members. |
| 3746 | if (NewDC && NewDC->isRecord()) { |
| 3747 | // In particular, don't warn about shadowing non-class members. |
| 3748 | if (!OldDC->isRecord()) |
| 3749 | return; |
| 3750 | |
| 3751 | // TODO: should we warn about static data members shadowing |
| 3752 | // static data members from base classes? |
| 3753 | |
| 3754 | // TODO: don't diagnose for inaccessible shadowed members. |
| 3755 | // This is hard to do perfectly because we might friend the |
| 3756 | // shadowing context, but that's just a false negative. |
| 3757 | } |
| 3758 | |
| 3759 | // Determine what kind of declaration we're shadowing. |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3760 | unsigned Kind; |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 3761 | if (isa<RecordDecl>(OldDC)) { |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3762 | if (isa<FieldDecl>(ShadowedDecl)) |
| 3763 | Kind = 3; // field |
| 3764 | else |
| 3765 | Kind = 2; // static data member |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 3766 | } else if (OldDC->isFileContext()) |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3767 | Kind = 1; // global |
| 3768 | else |
| 3769 | Kind = 0; // local |
| 3770 | |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 3771 | DeclarationName Name = R.getLookupName(); |
| 3772 | |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3773 | // Emit warning and note. |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 3774 | Diag(R.getNameLoc(), diag::warn_decl_shadow) << Name << Kind << OldDC; |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3775 | Diag(ShadowedDecl->getLocation(), diag::note_previous_declaration); |
| 3776 | } |
| 3777 | |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 3778 | /// \brief Check -Wshadow without the advantage of a previous lookup. |
| 3779 | void Sema::CheckShadow(Scope *S, VarDecl *D) { |
Argyrios Kyrtzidis | 0827408 | 2010-12-15 18:44:22 +0000 | [diff] [blame] | 3780 | if (Diags.getDiagnosticLevel(diag::warn_decl_shadow, D->getLocation()) == |
| 3781 | Diagnostic::Ignored) |
| 3782 | return; |
| 3783 | |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 3784 | LookupResult R(*this, D->getDeclName(), D->getLocation(), |
| 3785 | Sema::LookupOrdinaryName, Sema::ForRedeclaration); |
| 3786 | LookupName(R, S); |
| 3787 | CheckShadow(S, D, R); |
| 3788 | } |
| 3789 | |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3790 | /// \brief Perform semantic checking on a newly-created variable |
| 3791 | /// declaration. |
| 3792 | /// |
| 3793 | /// This routine performs all of the type-checking required for a |
Douglas Gregor | 180bb63 | 2009-05-01 15:47:09 +0000 | [diff] [blame] | 3794 | /// variable declaration once it has been built. It is used both to |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3795 | /// check variables after they have been parsed and their declarators |
Douglas Gregor | 180bb63 | 2009-05-01 15:47:09 +0000 | [diff] [blame] | 3796 | /// have been translated into a declaration, and to check variables |
| 3797 | /// that have been instantiated from a template. |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3798 | /// |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3799 | /// Sets NewVD->isInvalidDecl() if an error was encountered. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3800 | void Sema::CheckVariableDeclaration(VarDecl *NewVD, |
| 3801 | LookupResult &Previous, |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3802 | bool &Redeclaration) { |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3803 | // If the decl is already known invalid, don't check it. |
| 3804 | if (NewVD->isInvalidDecl()) |
| 3805 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3806 | |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3807 | QualType T = NewVD->getType(); |
| 3808 | |
John McCall | c12c5bb | 2010-05-15 11:32:37 +0000 | [diff] [blame] | 3809 | if (T->isObjCObjectType()) { |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3810 | Diag(NewVD->getLocation(), diag::err_statically_allocated_object); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3811 | return NewVD->setInvalidDecl(); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3812 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3813 | |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3814 | // Emit an error if an address space was applied to decl with local storage. |
| 3815 | // This includes arrays of objects with address space qualifiers, but not |
| 3816 | // automatic variables that point to other address spaces. |
| 3817 | // ISO/IEC TR 18037 S5.1.2 |
Chris Lattner | 16c5dea | 2010-10-10 18:16:20 +0000 | [diff] [blame] | 3818 | if (NewVD->hasLocalStorage() && T.getAddressSpace() != 0) { |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3819 | Diag(NewVD->getLocation(), diag::err_as_qualified_auto_decl); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3820 | return NewVD->setInvalidDecl(); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3821 | } |
Fariborz Jahanian | 7b5b317 | 2009-02-21 19:44:02 +0000 | [diff] [blame] | 3822 | |
Mike Stump | f33651c | 2009-04-14 00:57:29 +0000 | [diff] [blame] | 3823 | if (NewVD->hasLocalStorage() && T.isObjCGCWeak() |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 3824 | && !NewVD->hasAttr<BlocksAttr>()) |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3825 | Diag(NewVD->getLocation(), diag::warn_attribute_weak_on_local); |
Chris Lattner | 16c5dea | 2010-10-10 18:16:20 +0000 | [diff] [blame] | 3826 | |
Chris Lattner | 38c5ebd | 2009-04-19 05:21:20 +0000 | [diff] [blame] | 3827 | bool isVM = T->isVariablyModifiedType(); |
Chris Lattner | be6d259 | 2009-07-19 20:17:11 +0000 | [diff] [blame] | 3828 | if (isVM || NewVD->hasAttr<CleanupAttr>() || |
John McCall | e46f62c | 2010-08-01 01:24:59 +0000 | [diff] [blame] | 3829 | NewVD->hasAttr<BlocksAttr>()) |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 3830 | getCurFunction()->setHasBranchProtectedScope(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3831 | |
Chris Lattner | 38c5ebd | 2009-04-19 05:21:20 +0000 | [diff] [blame] | 3832 | if ((isVM && NewVD->hasLinkage()) || |
| 3833 | (T->isVariableArrayType() && NewVD->hasGlobalStorage())) { |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 3834 | bool SizeIsNegative; |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 3835 | llvm::APSInt Oversized; |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 3836 | QualType FixedTy = |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 3837 | TryToFixInvalidVariablyModifiedType(T, Context, SizeIsNegative, |
| 3838 | Oversized); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3839 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3840 | if (FixedTy.isNull() && T->isVariableArrayType()) { |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3841 | const VariableArrayType *VAT = Context.getAsVariableArrayType(T); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3842 | // FIXME: This won't give the correct result for |
| 3843 | // int a[10][n]; |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 3844 | SourceRange SizeRange = VAT->getSizeExpr()->getSourceRange(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3845 | |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 3846 | if (NewVD->isFileVarDecl()) |
| 3847 | Diag(NewVD->getLocation(), diag::err_vla_decl_in_file_scope) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3848 | << SizeRange; |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 3849 | else if (NewVD->getStorageClass() == SC_Static) |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 3850 | Diag(NewVD->getLocation(), diag::err_vla_decl_has_static_storage) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3851 | << SizeRange; |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 3852 | else |
| 3853 | Diag(NewVD->getLocation(), diag::err_vla_decl_has_extern_linkage) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3854 | << SizeRange; |
| 3855 | return NewVD->setInvalidDecl(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3856 | } |
| 3857 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3858 | if (FixedTy.isNull()) { |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 3859 | if (NewVD->isFileVarDecl()) |
| 3860 | Diag(NewVD->getLocation(), diag::err_vm_decl_in_file_scope); |
| 3861 | else |
| 3862 | Diag(NewVD->getLocation(), diag::err_vm_decl_has_extern_linkage); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3863 | return NewVD->setInvalidDecl(); |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 3864 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3865 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3866 | Diag(NewVD->getLocation(), diag::warn_illegal_constant_array_size); |
| 3867 | NewVD->setType(FixedTy); |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 3868 | } |
| 3869 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3870 | if (Previous.empty() && NewVD->isExternC()) { |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 3871 | // Since we did not find anything by this name and we're declaring |
| 3872 | // an extern "C" variable, look for a non-visible extern "C" |
| 3873 | // declaration with the same name. |
| 3874 | llvm::DenseMap<DeclarationName, NamedDecl *>::iterator Pos |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3875 | = LocallyScopedExternalDecls.find(NewVD->getDeclName()); |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 3876 | if (Pos != LocallyScopedExternalDecls.end()) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3877 | Previous.addDecl(Pos->second); |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 3878 | } |
| 3879 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3880 | if (T->isVoidType() && !NewVD->hasExternalStorage()) { |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3881 | Diag(NewVD->getLocation(), diag::err_typecheck_decl_incomplete_type) |
| 3882 | << T; |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3883 | return NewVD->setInvalidDecl(); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3884 | } |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3885 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 3886 | if (!NewVD->hasLocalStorage() && NewVD->hasAttr<BlocksAttr>()) { |
Mike Stump | ea000bf | 2009-04-30 00:19:40 +0000 | [diff] [blame] | 3887 | Diag(NewVD->getLocation(), diag::err_block_on_nonlocal); |
| 3888 | return NewVD->setInvalidDecl(); |
| 3889 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3890 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 3891 | if (isVM && NewVD->hasAttr<BlocksAttr>()) { |
Mike Stump | c975bb0 | 2009-05-01 23:41:47 +0000 | [diff] [blame] | 3892 | Diag(NewVD->getLocation(), diag::err_block_on_vm); |
| 3893 | return NewVD->setInvalidDecl(); |
| 3894 | } |
| 3895 | |
Sebastian Redl | f9ea1f3 | 2010-07-12 23:11:43 +0000 | [diff] [blame] | 3896 | // Function pointers and references cannot have qualified function type, only |
| 3897 | // function pointer-to-members can do that. |
| 3898 | QualType Pointee; |
| 3899 | unsigned PtrOrRef = 0; |
| 3900 | if (const PointerType *Ptr = T->getAs<PointerType>()) |
| 3901 | Pointee = Ptr->getPointeeType(); |
| 3902 | else if (const ReferenceType *Ref = T->getAs<ReferenceType>()) { |
| 3903 | Pointee = Ref->getPointeeType(); |
| 3904 | PtrOrRef = 1; |
| 3905 | } |
| 3906 | if (!Pointee.isNull() && Pointee->isFunctionProtoType() && |
| 3907 | Pointee->getAs<FunctionProtoType>()->getTypeQuals() != 0) { |
| 3908 | Diag(NewVD->getLocation(), diag::err_invalid_qualified_function_pointer) |
| 3909 | << PtrOrRef; |
| 3910 | return NewVD->setInvalidDecl(); |
| 3911 | } |
| 3912 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3913 | if (!Previous.empty()) { |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 3914 | Redeclaration = true; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3915 | MergeVarDecl(NewVD, Previous); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3916 | } |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3917 | } |
| 3918 | |
Douglas Gregor | a8f32e0 | 2009-10-06 17:59:45 +0000 | [diff] [blame] | 3919 | /// \brief Data used with FindOverriddenMethod |
| 3920 | struct FindOverriddenMethodData { |
| 3921 | Sema *S; |
| 3922 | CXXMethodDecl *Method; |
| 3923 | }; |
| 3924 | |
| 3925 | /// \brief Member lookup function that determines whether a given C++ |
| 3926 | /// method overrides a method in a base class, to be used with |
| 3927 | /// CXXRecordDecl::lookupInBases(). |
John McCall | af8e6ed | 2009-11-12 03:15:40 +0000 | [diff] [blame] | 3928 | static bool FindOverriddenMethod(const CXXBaseSpecifier *Specifier, |
Douglas Gregor | a8f32e0 | 2009-10-06 17:59:45 +0000 | [diff] [blame] | 3929 | CXXBasePath &Path, |
| 3930 | void *UserData) { |
| 3931 | RecordDecl *BaseRecord = Specifier->getType()->getAs<RecordType>()->getDecl(); |
Anders Carlsson | 9549680 | 2009-11-26 20:50:40 +0000 | [diff] [blame] | 3932 | |
Douglas Gregor | a8f32e0 | 2009-10-06 17:59:45 +0000 | [diff] [blame] | 3933 | FindOverriddenMethodData *Data |
| 3934 | = reinterpret_cast<FindOverriddenMethodData*>(UserData); |
Anders Carlsson | 9549680 | 2009-11-26 20:50:40 +0000 | [diff] [blame] | 3935 | |
| 3936 | DeclarationName Name = Data->Method->getDeclName(); |
| 3937 | |
| 3938 | // FIXME: Do we care about other names here too? |
| 3939 | if (Name.getNameKind() == DeclarationName::CXXDestructorName) { |
John McCall | ad00b77 | 2010-06-16 08:42:20 +0000 | [diff] [blame] | 3940 | // We really want to find the base class destructor here. |
Anders Carlsson | 9549680 | 2009-11-26 20:50:40 +0000 | [diff] [blame] | 3941 | QualType T = Data->S->Context.getTypeDeclType(BaseRecord); |
| 3942 | CanQualType CT = Data->S->Context.getCanonicalType(T); |
| 3943 | |
Anders Carlsson | 1a68972 | 2009-11-27 01:26:58 +0000 | [diff] [blame] | 3944 | Name = Data->S->Context.DeclarationNames.getCXXDestructorName(CT); |
Anders Carlsson | 9549680 | 2009-11-26 20:50:40 +0000 | [diff] [blame] | 3945 | } |
| 3946 | |
| 3947 | for (Path.Decls = BaseRecord->lookup(Name); |
Douglas Gregor | a8f32e0 | 2009-10-06 17:59:45 +0000 | [diff] [blame] | 3948 | Path.Decls.first != Path.Decls.second; |
| 3949 | ++Path.Decls.first) { |
John McCall | 52a0275 | 2010-06-16 09:33:39 +0000 | [diff] [blame] | 3950 | NamedDecl *D = *Path.Decls.first; |
John McCall | ad00b77 | 2010-06-16 08:42:20 +0000 | [diff] [blame] | 3951 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { |
| 3952 | if (MD->isVirtual() && !Data->S->IsOverload(Data->Method, MD, false)) |
Douglas Gregor | a8f32e0 | 2009-10-06 17:59:45 +0000 | [diff] [blame] | 3953 | return true; |
| 3954 | } |
| 3955 | } |
| 3956 | |
| 3957 | return false; |
| 3958 | } |
| 3959 | |
Sebastian Redl | a165da0 | 2009-11-18 21:51:29 +0000 | [diff] [blame] | 3960 | /// AddOverriddenMethods - See if a method overrides any in the base classes, |
| 3961 | /// and if so, check that it's a valid override and remember it. |
Douglas Gregor | a6c1e3a | 2010-10-13 22:55:32 +0000 | [diff] [blame] | 3962 | bool Sema::AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD) { |
Sebastian Redl | a165da0 | 2009-11-18 21:51:29 +0000 | [diff] [blame] | 3963 | // Look for virtual methods in base classes that this method might override. |
| 3964 | CXXBasePaths Paths; |
| 3965 | FindOverriddenMethodData Data; |
| 3966 | Data.Method = MD; |
| 3967 | Data.S = this; |
Douglas Gregor | a6c1e3a | 2010-10-13 22:55:32 +0000 | [diff] [blame] | 3968 | bool AddedAny = false; |
Sebastian Redl | a165da0 | 2009-11-18 21:51:29 +0000 | [diff] [blame] | 3969 | if (DC->lookupInBases(&FindOverriddenMethod, &Data, Paths)) { |
| 3970 | for (CXXBasePaths::decl_iterator I = Paths.found_decls_begin(), |
| 3971 | E = Paths.found_decls_end(); I != E; ++I) { |
| 3972 | if (CXXMethodDecl *OldMD = dyn_cast<CXXMethodDecl>(*I)) { |
| 3973 | if (!CheckOverridingFunctionReturnType(MD, OldMD) && |
Sean Hunt | bbd37c6 | 2009-11-21 08:43:09 +0000 | [diff] [blame] | 3974 | !CheckOverridingFunctionExceptionSpec(MD, OldMD) && |
Anders Carlsson | 2e1c730 | 2011-01-20 16:25:36 +0000 | [diff] [blame] | 3975 | !CheckIfOverriddenFunctionIsMarkedFinal(MD, OldMD)) { |
Anders Carlsson | 3aaf486 | 2009-12-04 05:51:56 +0000 | [diff] [blame] | 3976 | MD->addOverriddenMethod(OldMD->getCanonicalDecl()); |
Douglas Gregor | a6c1e3a | 2010-10-13 22:55:32 +0000 | [diff] [blame] | 3977 | AddedAny = true; |
| 3978 | } |
Sebastian Redl | a165da0 | 2009-11-18 21:51:29 +0000 | [diff] [blame] | 3979 | } |
| 3980 | } |
| 3981 | } |
Douglas Gregor | a6c1e3a | 2010-10-13 22:55:32 +0000 | [diff] [blame] | 3982 | |
| 3983 | return AddedAny; |
Sebastian Redl | a165da0 | 2009-11-18 21:51:29 +0000 | [diff] [blame] | 3984 | } |
| 3985 | |
John McCall | 29ae6e5 | 2010-10-13 05:45:15 +0000 | [diff] [blame] | 3986 | static void DiagnoseInvalidRedeclaration(Sema &S, FunctionDecl *NewFD) { |
| 3987 | LookupResult Prev(S, NewFD->getDeclName(), NewFD->getLocation(), |
| 3988 | Sema::LookupOrdinaryName, Sema::ForRedeclaration); |
| 3989 | S.LookupQualifiedName(Prev, NewFD->getDeclContext()); |
| 3990 | assert(!Prev.isAmbiguous() && |
| 3991 | "Cannot have an ambiguity in previous-declaration lookup"); |
| 3992 | for (LookupResult::iterator Func = Prev.begin(), FuncEnd = Prev.end(); |
| 3993 | Func != FuncEnd; ++Func) { |
| 3994 | if (isa<FunctionDecl>(*Func) && |
| 3995 | isNearlyMatchingFunction(S.Context, cast<FunctionDecl>(*Func), NewFD)) |
| 3996 | S.Diag((*Func)->getLocation(), diag::note_member_def_close_match); |
| 3997 | } |
| 3998 | } |
| 3999 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4000 | NamedDecl* |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4001 | Sema::ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 4002 | QualType R, TypeSourceInfo *TInfo, |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4003 | LookupResult &Previous, |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 4004 | MultiTemplateParamsArg TemplateParamLists, |
Sean Hunt | fe2695e | 2011-05-06 01:42:00 +0000 | [diff] [blame] | 4005 | bool IsFunctionDefinition, bool &Redeclaration, |
| 4006 | SourceLocation DefLoc) { |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4007 | assert(R.getTypePtr()->isFunctionType()); |
| 4008 | |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 4009 | // TODO: consider using NameInfo for diagnostic. |
| 4010 | DeclarationNameInfo NameInfo = GetNameForDeclarator(D); |
| 4011 | DeclarationName Name = NameInfo.getName(); |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 4012 | FunctionDecl::StorageClass SC = SC_None; |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4013 | switch (D.getDeclSpec().getStorageClassSpec()) { |
| 4014 | default: assert(0 && "Unknown storage class!"); |
| 4015 | case DeclSpec::SCS_auto: |
| 4016 | case DeclSpec::SCS_register: |
| 4017 | case DeclSpec::SCS_mutable: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4018 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 4019 | diag::err_typecheck_sclass_func); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 4020 | D.setInvalidType(); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4021 | break; |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 4022 | case DeclSpec::SCS_unspecified: SC = SC_None; break; |
| 4023 | case DeclSpec::SCS_extern: SC = SC_Extern; break; |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 4024 | case DeclSpec::SCS_static: { |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 4025 | if (CurContext->getRedeclContext()->isFunctionOrMethod()) { |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 4026 | // C99 6.7.1p5: |
| 4027 | // The declaration of an identifier for a function that has |
| 4028 | // block scope shall have no explicit storage-class specifier |
| 4029 | // other than extern |
| 4030 | // See also (C++ [dcl.stc]p4). |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4031 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 4032 | diag::err_static_block_func); |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 4033 | SC = SC_None; |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 4034 | } else |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 4035 | SC = SC_Static; |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 4036 | break; |
| 4037 | } |
Gabor Greif | a4a301d | 2010-09-08 00:31:13 +0000 | [diff] [blame] | 4038 | case DeclSpec::SCS_private_extern: SC = SC_PrivateExtern; break; |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4039 | } |
| 4040 | |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 4041 | if (D.getDeclSpec().isThreadSpecified()) |
| 4042 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_invalid_thread); |
| 4043 | |
Chris Lattner | bb74982 | 2009-04-11 19:17:25 +0000 | [diff] [blame] | 4044 | // Do not allow returning a objc interface by-value. |
John McCall | c12c5bb | 2010-05-15 11:32:37 +0000 | [diff] [blame] | 4045 | if (R->getAs<FunctionType>()->getResultType()->isObjCObjectType()) { |
Chris Lattner | bb74982 | 2009-04-11 19:17:25 +0000 | [diff] [blame] | 4046 | Diag(D.getIdentifierLoc(), |
| 4047 | diag::err_object_cannot_be_passed_returned_by_value) << 0 |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4048 | << R->getAs<FunctionType>()->getResultType(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 4049 | D.setInvalidType(); |
Chris Lattner | bb74982 | 2009-04-11 19:17:25 +0000 | [diff] [blame] | 4050 | } |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4051 | |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4052 | FunctionDecl *NewFD; |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4053 | bool isInline = D.getDeclSpec().isInlineSpecified(); |
Douglas Gregor | 3922ed0 | 2010-12-10 19:28:19 +0000 | [diff] [blame] | 4054 | bool isFriend = false; |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4055 | DeclSpec::SCS SCSpec = D.getDeclSpec().getStorageClassSpecAsWritten(); |
| 4056 | FunctionDecl::StorageClass SCAsWritten |
| 4057 | = StorageClassSpecToFunctionDeclStorageClass(SCSpec); |
Douglas Gregor | 3922ed0 | 2010-12-10 19:28:19 +0000 | [diff] [blame] | 4058 | FunctionTemplateDecl *FunctionTemplate = 0; |
| 4059 | bool isExplicitSpecialization = false; |
| 4060 | bool isFunctionTemplateSpecialization = false; |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 4061 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4062 | if (!getLangOptions().CPlusPlus) { |
Sean Hunt | fe2695e | 2011-05-06 01:42:00 +0000 | [diff] [blame] | 4063 | assert(!DefLoc.isValid() && "Defaulted functions are a C++ feature"); |
| 4064 | |
Douglas Gregor | d874def | 2009-03-19 18:33:54 +0000 | [diff] [blame] | 4065 | // Determine whether the function was written with a |
| 4066 | // prototype. This true when: |
Douglas Gregor | d874def | 2009-03-19 18:33:54 +0000 | [diff] [blame] | 4067 | // - there is a prototype in the declarator, or |
| 4068 | // - the type R of the function is some kind of typedef or other reference |
| 4069 | // to a type name (which eventually refers to a function type). |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4070 | bool HasPrototype = |
Abramo Bagnara | 075f8f1 | 2010-12-10 16:29:40 +0000 | [diff] [blame] | 4071 | (D.isFunctionDeclarator() && D.getFunctionTypeInfo().hasPrototype) || |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4072 | (!isa<FunctionType>(R.getTypePtr()) && R->isFunctionProtoType()); |
| 4073 | |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 4074 | NewFD = FunctionDecl::Create(Context, DC, D.getSourceRange().getBegin(), |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 4075 | NameInfo, R, TInfo, SC, SCAsWritten, isInline, |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 4076 | HasPrototype); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4077 | if (D.isInvalidType()) |
| 4078 | NewFD->setInvalidDecl(); |
| 4079 | |
| 4080 | // Set the lexical context. |
| 4081 | NewFD->setLexicalDeclContext(CurContext); |
| 4082 | // Filter out previous declarations that don't match the scope. |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 4083 | FilterLookupForScope(Previous, DC, S, NewFD->hasLinkage(), |
Douglas Gregor | cc20945 | 2011-03-07 16:54:27 +0000 | [diff] [blame] | 4084 | /*ExplicitInstantiationOrSpecialization=*/false); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4085 | } else { |
| 4086 | isFriend = D.getDeclSpec().isFriendSpecified(); |
Douglas Gregor | 3922ed0 | 2010-12-10 19:28:19 +0000 | [diff] [blame] | 4087 | bool isVirtual = D.getDeclSpec().isVirtualSpecified(); |
| 4088 | bool isExplicit = D.getDeclSpec().isExplicitSpecified(); |
| 4089 | bool isVirtualOkay = false; |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4090 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4091 | // Check that the return type is not an abstract class type. |
| 4092 | // For record types, this is done by the AbstractClassUsageDiagnoser once |
| 4093 | // the class has been completely parsed. |
| 4094 | if (!DC->isRecord() && |
| 4095 | RequireNonAbstractType(D.getIdentifierLoc(), |
| 4096 | R->getAs<FunctionType>()->getResultType(), |
| 4097 | diag::err_abstract_type_in_decl, |
| 4098 | AbstractReturnType)) |
| 4099 | D.setInvalidType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4100 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4101 | if (Name.getNameKind() == DeclarationName::CXXConstructorName) { |
| 4102 | // This is a C++ constructor declaration. |
| 4103 | assert(DC->isRecord() && |
| 4104 | "Constructors can only be declared in a member context"); |
| 4105 | |
| 4106 | R = CheckConstructorDeclarator(D, R, SC); |
| 4107 | |
| 4108 | // Create the new declaration |
Sean Hunt | fe2695e | 2011-05-06 01:42:00 +0000 | [diff] [blame] | 4109 | CXXConstructorDecl *NewCD = CXXConstructorDecl::Create( |
| 4110 | Context, |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4111 | cast<CXXRecordDecl>(DC), |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 4112 | D.getSourceRange().getBegin(), |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4113 | NameInfo, R, TInfo, |
| 4114 | isExplicit, isInline, |
Sean Hunt | 5f802e5 | 2011-05-06 00:11:07 +0000 | [diff] [blame] | 4115 | /*isImplicitlyDeclared=*/false); |
Sean Hunt | fe2695e | 2011-05-06 01:42:00 +0000 | [diff] [blame] | 4116 | |
| 4117 | NewFD = NewCD; |
| 4118 | |
| 4119 | if (DefLoc.isValid()) { |
| 4120 | if (NewCD->isDefaultConstructor() || |
| 4121 | NewCD->isCopyOrMoveConstructor()) { |
| 4122 | NewFD->setDefaulted(); |
| 4123 | NewFD->setExplicitlyDefaulted(); |
| 4124 | } else { |
| 4125 | Diag(DefLoc, diag::err_default_special_members); |
| 4126 | } |
| 4127 | } |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4128 | } else if (Name.getNameKind() == DeclarationName::CXXDestructorName) { |
| 4129 | // This is a C++ destructor declaration. |
| 4130 | if (DC->isRecord()) { |
| 4131 | R = CheckDestructorDeclarator(D, R, SC); |
| 4132 | |
| 4133 | NewFD = CXXDestructorDecl::Create(Context, |
| 4134 | cast<CXXRecordDecl>(DC), |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 4135 | D.getSourceRange().getBegin(), |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4136 | NameInfo, R, TInfo, |
| 4137 | isInline, |
| 4138 | /*isImplicitlyDeclared=*/false); |
| 4139 | isVirtualOkay = true; |
Sean Hunt | fe2695e | 2011-05-06 01:42:00 +0000 | [diff] [blame] | 4140 | |
| 4141 | if (DefLoc.isValid()) { |
| 4142 | NewFD->setDefaulted(); |
| 4143 | NewFD->setExplicitlyDefaulted(); |
| 4144 | } |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4145 | } else { |
| 4146 | Diag(D.getIdentifierLoc(), diag::err_destructor_not_member); |
| 4147 | |
| 4148 | // Create a FunctionDecl to satisfy the function definition parsing |
| 4149 | // code path. |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 4150 | NewFD = FunctionDecl::Create(Context, DC, D.getSourceRange().getBegin(), |
| 4151 | D.getIdentifierLoc(), Name, R, TInfo, |
| 4152 | SC, SCAsWritten, isInline, |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4153 | /*hasPrototype=*/true); |
| 4154 | D.setInvalidType(); |
| 4155 | } |
| 4156 | } else if (Name.getNameKind() == DeclarationName::CXXConversionFunctionName) { |
| 4157 | if (!DC->isRecord()) { |
| 4158 | Diag(D.getIdentifierLoc(), |
| 4159 | diag::err_conv_function_not_member); |
| 4160 | return 0; |
| 4161 | } |
| 4162 | |
Sean Hunt | fe2695e | 2011-05-06 01:42:00 +0000 | [diff] [blame] | 4163 | if (DefLoc.isValid()) |
| 4164 | Diag(DefLoc, diag::err_default_special_members); |
| 4165 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4166 | CheckConversionDeclarator(D, R, SC); |
| 4167 | NewFD = CXXConversionDecl::Create(Context, cast<CXXRecordDecl>(DC), |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 4168 | D.getSourceRange().getBegin(), |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4169 | NameInfo, R, TInfo, |
Douglas Gregor | f525160 | 2011-03-08 17:10:18 +0000 | [diff] [blame] | 4170 | isInline, isExplicit, |
| 4171 | SourceLocation()); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4172 | |
| 4173 | isVirtualOkay = true; |
| 4174 | } else if (DC->isRecord()) { |
| 4175 | // If the of the function is the same as the name of the record, then this |
| 4176 | // must be an invalid constructor that has a return type. |
| 4177 | // (The parser checks for a return type and makes the declarator a |
| 4178 | // constructor if it has no return type). |
| 4179 | // must have an invalid constructor that has a return type |
| 4180 | if (Name.getAsIdentifierInfo() && |
| 4181 | Name.getAsIdentifierInfo() == cast<CXXRecordDecl>(DC)->getIdentifier()){ |
| 4182 | Diag(D.getIdentifierLoc(), diag::err_constructor_return_type) |
| 4183 | << SourceRange(D.getDeclSpec().getTypeSpecTypeLoc()) |
| 4184 | << SourceRange(D.getIdentifierLoc()); |
| 4185 | return 0; |
| 4186 | } |
| 4187 | |
| 4188 | bool isStatic = SC == SC_Static; |
Sebastian Redl | 8999fe1 | 2011-03-14 18:08:30 +0000 | [diff] [blame] | 4189 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4190 | // [class.free]p1: |
| 4191 | // Any allocation function for a class T is a static member |
| 4192 | // (even if not explicitly declared static). |
| 4193 | if (Name.getCXXOverloadedOperator() == OO_New || |
| 4194 | Name.getCXXOverloadedOperator() == OO_Array_New) |
| 4195 | isStatic = true; |
| 4196 | |
| 4197 | // [class.free]p6 Any deallocation function for a class X is a static member |
| 4198 | // (even if not explicitly declared static). |
| 4199 | if (Name.getCXXOverloadedOperator() == OO_Delete || |
| 4200 | Name.getCXXOverloadedOperator() == OO_Array_Delete) |
| 4201 | isStatic = true; |
Sebastian Redl | 8999fe1 | 2011-03-14 18:08:30 +0000 | [diff] [blame] | 4202 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4203 | // This is a C++ method declaration. |
Sean Hunt | fe2695e | 2011-05-06 01:42:00 +0000 | [diff] [blame] | 4204 | CXXMethodDecl *NewMD = CXXMethodDecl::Create( |
| 4205 | Context, cast<CXXRecordDecl>(DC), |
| 4206 | D.getSourceRange().getBegin(), |
| 4207 | NameInfo, R, TInfo, |
| 4208 | isStatic, SCAsWritten, isInline, |
| 4209 | SourceLocation()); |
| 4210 | NewFD = NewMD; |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4211 | |
| 4212 | isVirtualOkay = !isStatic; |
Sean Hunt | fe2695e | 2011-05-06 01:42:00 +0000 | [diff] [blame] | 4213 | |
| 4214 | if (DefLoc.isValid()) { |
| 4215 | if (NewMD->isCopyAssignmentOperator() /* || |
| 4216 | NewMD->isMoveAssignmentOperator() */) { |
| 4217 | NewFD->setDefaulted(); |
| 4218 | NewFD->setExplicitlyDefaulted(); |
| 4219 | } else { |
| 4220 | Diag(DefLoc, diag::err_default_special_members); |
| 4221 | } |
| 4222 | } |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4223 | } else { |
Sean Hunt | fe2695e | 2011-05-06 01:42:00 +0000 | [diff] [blame] | 4224 | if (DefLoc.isValid()) |
| 4225 | Diag(DefLoc, diag::err_default_special_members); |
| 4226 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4227 | // Determine whether the function was written with a |
| 4228 | // prototype. This true when: |
| 4229 | // - we're in C++ (where every function has a prototype), |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 4230 | NewFD = FunctionDecl::Create(Context, DC, D.getSourceRange().getBegin(), |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4231 | NameInfo, R, TInfo, SC, SCAsWritten, isInline, |
| 4232 | true/*HasPrototype*/); |
| 4233 | } |
Abramo Bagnara | b0a2fcc | 2011-03-18 15:21:59 +0000 | [diff] [blame] | 4234 | |
| 4235 | if (isFriend && !isInline && IsFunctionDefinition) { |
| 4236 | // C++ [class.friend]p5 |
| 4237 | // A function can be defined in a friend declaration of a |
| 4238 | // class . . . . Such a function is implicitly inline. |
| 4239 | NewFD->setImplicitlyInline(); |
| 4240 | } |
| 4241 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4242 | SetNestedNameSpecifier(NewFD, D); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4243 | isExplicitSpecialization = false; |
| 4244 | isFunctionTemplateSpecialization = false; |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4245 | if (D.isInvalidType()) |
| 4246 | NewFD->setInvalidDecl(); |
| 4247 | |
| 4248 | // Set the lexical context. If the declarator has a C++ |
| 4249 | // scope specifier, or is the object of a friend declaration, the |
| 4250 | // lexical context will be different from the semantic context. |
| 4251 | NewFD->setLexicalDeclContext(CurContext); |
| 4252 | |
| 4253 | // Match up the template parameter lists with the scope specifier, then |
| 4254 | // determine whether we have a template or a template specialization. |
| 4255 | bool Invalid = false; |
| 4256 | if (TemplateParameterList *TemplateParams |
Douglas Gregor | cb710a4 | 2011-03-04 22:45:55 +0000 | [diff] [blame] | 4257 | = MatchTemplateParametersToScopeSpecifier( |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 4258 | D.getDeclSpec().getSourceRange().getBegin(), |
| 4259 | D.getCXXScopeSpec(), |
John McCall | 6102ca1 | 2010-10-16 06:59:13 +0000 | [diff] [blame] | 4260 | TemplateParamLists.get(), |
| 4261 | TemplateParamLists.size(), |
| 4262 | isFriend, |
| 4263 | isExplicitSpecialization, |
| 4264 | Invalid)) { |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 4265 | if (TemplateParams->size() > 0) { |
| 4266 | // This is a function template |
Abramo Bagnara | 9b93488 | 2010-06-12 08:15:14 +0000 | [diff] [blame] | 4267 | |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 4268 | // Check that we can declare a template here. |
| 4269 | if (CheckTemplateDeclScope(S, TemplateParams)) |
| 4270 | return 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4271 | |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 4272 | // A destructor cannot be a template. |
| 4273 | if (Name.getNameKind() == DeclarationName::CXXDestructorName) { |
| 4274 | Diag(NewFD->getLocation(), diag::err_destructor_template); |
| 4275 | return 0; |
John McCall | 5fd378b | 2010-03-24 08:27:58 +0000 | [diff] [blame] | 4276 | } |
| 4277 | |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 4278 | FunctionTemplate = FunctionTemplateDecl::Create(Context, DC, |
| 4279 | NewFD->getLocation(), |
| 4280 | Name, TemplateParams, |
| 4281 | NewFD); |
| 4282 | FunctionTemplate->setLexicalDeclContext(CurContext); |
| 4283 | NewFD->setDescribedFunctionTemplate(FunctionTemplate); |
| 4284 | |
| 4285 | // For source fidelity, store the other template param lists. |
| 4286 | if (TemplateParamLists.size() > 1) { |
| 4287 | NewFD->setTemplateParameterListsInfo(Context, |
| 4288 | TemplateParamLists.size() - 1, |
| 4289 | TemplateParamLists.release()); |
| 4290 | } |
| 4291 | } else { |
| 4292 | // This is a function template specialization. |
| 4293 | isFunctionTemplateSpecialization = true; |
| 4294 | // For source fidelity, store all the template param lists. |
| 4295 | NewFD->setTemplateParameterListsInfo(Context, |
| 4296 | TemplateParamLists.size(), |
| 4297 | TemplateParamLists.release()); |
| 4298 | |
| 4299 | // C++0x [temp.expl.spec]p20 forbids "template<> friend void foo(int);". |
| 4300 | if (isFriend) { |
| 4301 | // We want to remove the "template<>", found here. |
| 4302 | SourceRange RemoveRange = TemplateParams->getSourceRange(); |
| 4303 | |
| 4304 | // If we remove the template<> and the name is not a |
| 4305 | // template-id, we're actually silently creating a problem: |
| 4306 | // the friend declaration will refer to an untemplated decl, |
| 4307 | // and clearly the user wants a template specialization. So |
| 4308 | // we need to insert '<>' after the name. |
| 4309 | SourceLocation InsertLoc; |
| 4310 | if (D.getName().getKind() != UnqualifiedId::IK_TemplateId) { |
| 4311 | InsertLoc = D.getName().getSourceRange().getEnd(); |
| 4312 | InsertLoc = PP.getLocForEndOfToken(InsertLoc); |
| 4313 | } |
| 4314 | |
| 4315 | Diag(D.getIdentifierLoc(), diag::err_template_spec_decl_friend) |
| 4316 | << Name << RemoveRange |
| 4317 | << FixItHint::CreateRemoval(RemoveRange) |
| 4318 | << FixItHint::CreateInsertion(InsertLoc, "<>"); |
| 4319 | } |
| 4320 | } |
| 4321 | } |
| 4322 | else { |
| 4323 | // All template param lists were matched against the scope specifier: |
| 4324 | // this is NOT (an explicit specialization of) a template. |
| 4325 | if (TemplateParamLists.size() > 0) |
| 4326 | // For source fidelity, store all the template param lists. |
| 4327 | NewFD->setTemplateParameterListsInfo(Context, |
| 4328 | TemplateParamLists.size(), |
| 4329 | TemplateParamLists.release()); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4330 | } |
| 4331 | |
| 4332 | if (Invalid) { |
| 4333 | NewFD->setInvalidDecl(); |
| 4334 | if (FunctionTemplate) |
| 4335 | FunctionTemplate->setInvalidDecl(); |
| 4336 | } |
| 4337 | |
| 4338 | // C++ [dcl.fct.spec]p5: |
| 4339 | // The virtual specifier shall only be used in declarations of |
| 4340 | // nonstatic class member functions that appear within a |
| 4341 | // member-specification of a class declaration; see 10.3. |
| 4342 | // |
| 4343 | if (isVirtual && !NewFD->isInvalidDecl()) { |
| 4344 | if (!isVirtualOkay) { |
| 4345 | Diag(D.getDeclSpec().getVirtualSpecLoc(), |
| 4346 | diag::err_virtual_non_function); |
| 4347 | } else if (!CurContext->isRecord()) { |
| 4348 | // 'virtual' was specified outside of the class. |
Anders Carlsson | f1602a5 | 2011-01-22 14:43:56 +0000 | [diff] [blame] | 4349 | Diag(D.getDeclSpec().getVirtualSpecLoc(), |
| 4350 | diag::err_virtual_out_of_class) |
| 4351 | << FixItHint::CreateRemoval(D.getDeclSpec().getVirtualSpecLoc()); |
| 4352 | } else if (NewFD->getDescribedFunctionTemplate()) { |
| 4353 | // C++ [temp.mem]p3: |
| 4354 | // A member function template shall not be virtual. |
| 4355 | Diag(D.getDeclSpec().getVirtualSpecLoc(), |
| 4356 | diag::err_virtual_member_function_template) |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4357 | << FixItHint::CreateRemoval(D.getDeclSpec().getVirtualSpecLoc()); |
| 4358 | } else { |
| 4359 | // Okay: Add virtual to the method. |
| 4360 | NewFD->setVirtualAsWritten(true); |
John McCall | 7ad650f | 2010-03-24 07:46:06 +0000 | [diff] [blame] | 4361 | } |
Douglas Gregor | c5c903a | 2009-06-24 00:23:40 +0000 | [diff] [blame] | 4362 | } |
Abramo Bagnara | 9b93488 | 2010-06-12 08:15:14 +0000 | [diff] [blame] | 4363 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4364 | // C++ [dcl.fct.spec]p3: |
| 4365 | // The inline specifier shall not appear on a block scope function declaration. |
| 4366 | if (isInline && !NewFD->isInvalidDecl()) { |
| 4367 | if (CurContext->isFunctionOrMethod()) { |
| 4368 | // 'inline' is not allowed on block scope function declaration. |
| 4369 | Diag(D.getDeclSpec().getInlineSpecLoc(), |
| 4370 | diag::err_inline_declaration_block_scope) << Name |
| 4371 | << FixItHint::CreateRemoval(D.getDeclSpec().getInlineSpecLoc()); |
| 4372 | } |
| 4373 | } |
| 4374 | |
| 4375 | // C++ [dcl.fct.spec]p6: |
| 4376 | // The explicit specifier shall be used only in the declaration of a |
| 4377 | // constructor or conversion function within its class definition; see 12.3.1 |
| 4378 | // and 12.3.2. |
| 4379 | if (isExplicit && !NewFD->isInvalidDecl()) { |
| 4380 | if (!CurContext->isRecord()) { |
| 4381 | // 'explicit' was specified outside of the class. |
| 4382 | Diag(D.getDeclSpec().getExplicitSpecLoc(), |
| 4383 | diag::err_explicit_out_of_class) |
| 4384 | << FixItHint::CreateRemoval(D.getDeclSpec().getExplicitSpecLoc()); |
| 4385 | } else if (!isa<CXXConstructorDecl>(NewFD) && |
| 4386 | !isa<CXXConversionDecl>(NewFD)) { |
| 4387 | // 'explicit' was specified on a function that wasn't a constructor |
| 4388 | // or conversion function. |
| 4389 | Diag(D.getDeclSpec().getExplicitSpecLoc(), |
| 4390 | diag::err_explicit_non_ctor_or_conv_function) |
| 4391 | << FixItHint::CreateRemoval(D.getDeclSpec().getExplicitSpecLoc()); |
| 4392 | } |
| 4393 | } |
Abramo Bagnara | 9b93488 | 2010-06-12 08:15:14 +0000 | [diff] [blame] | 4394 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4395 | // Filter out previous declarations that don't match the scope. |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 4396 | FilterLookupForScope(Previous, DC, S, NewFD->hasLinkage(), |
Douglas Gregor | cc20945 | 2011-03-07 16:54:27 +0000 | [diff] [blame] | 4397 | isExplicitSpecialization || |
| 4398 | isFunctionTemplateSpecialization); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4399 | |
| 4400 | if (isFriend) { |
| 4401 | // For now, claim that the objects have no previous declaration. |
| 4402 | if (FunctionTemplate) { |
| 4403 | FunctionTemplate->setObjectOfFriendDecl(false); |
| 4404 | FunctionTemplate->setAccess(AS_public); |
| 4405 | } |
| 4406 | NewFD->setObjectOfFriendDecl(false); |
| 4407 | NewFD->setAccess(AS_public); |
| 4408 | } |
| 4409 | |
John McCall | bfdcdc8 | 2010-12-15 04:00:32 +0000 | [diff] [blame] | 4410 | if (isa<CXXMethodDecl>(NewFD) && DC == CurContext && IsFunctionDefinition) { |
| 4411 | // A method is implicitly inline if it's defined in its class |
| 4412 | // definition. |
| 4413 | NewFD->setImplicitlyInline(); |
| 4414 | } |
| 4415 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4416 | if (SC == SC_Static && isa<CXXMethodDecl>(NewFD) && |
| 4417 | !CurContext->isRecord()) { |
| 4418 | // C++ [class.static]p1: |
| 4419 | // A data or function member of a class may be declared static |
| 4420 | // in a class definition, in which case it is a static member of |
| 4421 | // the class. |
| 4422 | |
| 4423 | // Complain about the 'static' specifier if it's on an out-of-line |
| 4424 | // member function definition. |
| 4425 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), |
| 4426 | diag::err_static_out_of_line) |
| 4427 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); |
| 4428 | } |
Douglas Gregor | 0167f3c | 2010-07-14 23:14:12 +0000 | [diff] [blame] | 4429 | } |
| 4430 | |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4431 | // Handle GNU asm-label extension (encoded as an attribute). |
| 4432 | if (Expr *E = (Expr*) D.getAsmLabel()) { |
| 4433 | // The parser guarantees this is a string. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4434 | StringLiteral *SE = cast<StringLiteral>(E); |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 4435 | NewFD->addAttr(::new (Context) AsmLabelAttr(SE->getStrTokenLoc(0), Context, |
| 4436 | SE->getString())); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4437 | } |
| 4438 | |
Chris Lattner | 2dbd285 | 2009-04-25 06:12:16 +0000 | [diff] [blame] | 4439 | // Copy the parameter declarations from the declarator D to the function |
| 4440 | // declaration NewFD, if they are available. First scavenge them into Params. |
| 4441 | llvm::SmallVector<ParmVarDecl*, 16> Params; |
Abramo Bagnara | 723df24 | 2010-12-14 22:11:44 +0000 | [diff] [blame] | 4442 | if (D.isFunctionDeclarator()) { |
Abramo Bagnara | 075f8f1 | 2010-12-10 16:29:40 +0000 | [diff] [blame] | 4443 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo(); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4444 | |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4445 | // Check for C99 6.7.5.3p10 - foo(void) is a non-varargs |
| 4446 | // function that takes no arguments, not a function that takes a |
| 4447 | // single void argument. |
| 4448 | // We let through "const void" here because Sema::GetTypeForDeclarator |
| 4449 | // already checks for that case. |
| 4450 | if (FTI.NumArgs == 1 && !FTI.isVariadic && FTI.ArgInfo[0].Ident == 0 && |
| 4451 | FTI.ArgInfo[0].Param && |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 4452 | cast<ParmVarDecl>(FTI.ArgInfo[0].Param)->getType()->isVoidType()) { |
Chris Lattner | 2dbd285 | 2009-04-25 06:12:16 +0000 | [diff] [blame] | 4453 | // Empty arg list, don't push any params. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 4454 | ParmVarDecl *Param = cast<ParmVarDecl>(FTI.ArgInfo[0].Param); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4455 | |
| 4456 | // In C++, the empty parameter-type-list must be spelled "void"; a |
| 4457 | // typedef of void is not permitted. |
| 4458 | if (getLangOptions().CPlusPlus && |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 4459 | Param->getType().getUnqualifiedType() != Context.VoidTy) { |
| 4460 | bool IsTypeAlias = false; |
| 4461 | if (const TypedefType *TT = Param->getType()->getAs<TypedefType>()) |
| 4462 | IsTypeAlias = isa<TypeAliasDecl>(TT->getDecl()); |
Richard Smith | 3e4c6c4 | 2011-05-05 21:57:07 +0000 | [diff] [blame] | 4463 | else if (const TemplateSpecializationType *TST = |
| 4464 | Param->getType()->getAs<TemplateSpecializationType>()) |
| 4465 | IsTypeAlias = TST->isTypeAlias(); |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 4466 | Diag(Param->getLocation(), diag::err_param_typedef_of_void) |
| 4467 | << IsTypeAlias; |
| 4468 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4469 | } else if (FTI.NumArgs > 0 && FTI.ArgInfo[0].Param != 0) { |
Argyrios Kyrtzidis | 9bedef6 | 2009-07-14 03:18:53 +0000 | [diff] [blame] | 4470 | for (unsigned i = 0, e = FTI.NumArgs; i != e; ++i) { |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 4471 | ParmVarDecl *Param = cast<ParmVarDecl>(FTI.ArgInfo[i].Param); |
Argyrios Kyrtzidis | 9bedef6 | 2009-07-14 03:18:53 +0000 | [diff] [blame] | 4472 | assert(Param->getDeclContext() != NewFD && "Was set before ?"); |
| 4473 | Param->setDeclContext(NewFD); |
| 4474 | Params.push_back(Param); |
John McCall | f19de1c | 2010-04-14 01:27:20 +0000 | [diff] [blame] | 4475 | |
| 4476 | if (Param->isInvalidDecl()) |
| 4477 | NewFD->setInvalidDecl(); |
Argyrios Kyrtzidis | 9bedef6 | 2009-07-14 03:18:53 +0000 | [diff] [blame] | 4478 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4479 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4480 | |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 4481 | } else if (const FunctionProtoType *FT = R->getAs<FunctionProtoType>()) { |
Chris Lattner | 1ad9b28 | 2009-04-25 06:03:53 +0000 | [diff] [blame] | 4482 | // When we're declaring a function with a typedef, typeof, etc as in the |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4483 | // following example, we'll need to synthesize (unnamed) |
| 4484 | // parameters for use in the declaration. |
| 4485 | // |
| 4486 | // @code |
| 4487 | // typedef void fn(int); |
| 4488 | // fn f; |
| 4489 | // @endcode |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4490 | |
Chris Lattner | 1ad9b28 | 2009-04-25 06:03:53 +0000 | [diff] [blame] | 4491 | // Synthesize a parameter for each argument type. |
Chris Lattner | 1ad9b28 | 2009-04-25 06:03:53 +0000 | [diff] [blame] | 4492 | for (FunctionProtoType::arg_type_iterator AI = FT->arg_type_begin(), |
| 4493 | AE = FT->arg_type_end(); AI != AE; ++AI) { |
John McCall | 82dc009 | 2010-06-04 11:21:44 +0000 | [diff] [blame] | 4494 | ParmVarDecl *Param = |
| 4495 | BuildParmVarDeclForTypedef(NewFD, D.getIdentifierLoc(), *AI); |
John McCall | fb44de9 | 2011-05-01 22:35:37 +0000 | [diff] [blame] | 4496 | Param->setScopeInfo(0, Params.size()); |
Chris Lattner | 1ad9b28 | 2009-04-25 06:03:53 +0000 | [diff] [blame] | 4497 | Params.push_back(Param); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4498 | } |
Chris Lattner | 84bb944 | 2009-04-25 18:38:18 +0000 | [diff] [blame] | 4499 | } else { |
| 4500 | assert(R->isFunctionNoProtoType() && NewFD->getNumParams() == 0 && |
| 4501 | "Should not need args for typedef of non-prototype fn"); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4502 | } |
Chris Lattner | 2dbd285 | 2009-04-25 06:12:16 +0000 | [diff] [blame] | 4503 | // Finally, we know we have the right number of parameters, install them. |
Douglas Gregor | 838db38 | 2010-02-11 01:19:42 +0000 | [diff] [blame] | 4504 | NewFD->setParams(Params.data(), Params.size()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4505 | |
Peter Collingbourne | c80e811 | 2011-01-21 02:08:54 +0000 | [diff] [blame] | 4506 | // Process the non-inheritable attributes on this declaration. |
| 4507 | ProcessDeclAttributes(S, NewFD, D, |
| 4508 | /*NonInheritable=*/true, /*Inheritable=*/false); |
| 4509 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4510 | if (!getLangOptions().CPlusPlus) { |
| 4511 | // Perform semantic checking on the function declaration. |
Fariborz Jahanian | 9913d6e | 2010-12-10 17:05:33 +0000 | [diff] [blame] | 4512 | bool isExplctSpecialization=false; |
| 4513 | CheckFunctionDeclaration(S, NewFD, Previous, isExplctSpecialization, |
Peter Collingbourne | c80e811 | 2011-01-21 02:08:54 +0000 | [diff] [blame] | 4514 | Redeclaration); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4515 | assert((NewFD->isInvalidDecl() || !Redeclaration || |
| 4516 | Previous.getResultKind() != LookupResult::FoundOverloaded) && |
| 4517 | "previous declaration set still overloaded"); |
| 4518 | } else { |
| 4519 | // If the declarator is a template-id, translate the parser's template |
| 4520 | // argument list into our AST format. |
| 4521 | bool HasExplicitTemplateArgs = false; |
| 4522 | TemplateArgumentListInfo TemplateArgs; |
| 4523 | if (D.getName().getKind() == UnqualifiedId::IK_TemplateId) { |
| 4524 | TemplateIdAnnotation *TemplateId = D.getName().TemplateId; |
| 4525 | TemplateArgs.setLAngleLoc(TemplateId->LAngleLoc); |
| 4526 | TemplateArgs.setRAngleLoc(TemplateId->RAngleLoc); |
| 4527 | ASTTemplateArgsPtr TemplateArgsPtr(*this, |
| 4528 | TemplateId->getTemplateArgs(), |
| 4529 | TemplateId->NumArgs); |
| 4530 | translateTemplateArguments(TemplateArgsPtr, |
| 4531 | TemplateArgs); |
| 4532 | TemplateArgsPtr.release(); |
Douglas Gregor | 0b60d9e | 2009-09-25 23:53:26 +0000 | [diff] [blame] | 4533 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4534 | HasExplicitTemplateArgs = true; |
Douglas Gregor | 0b60d9e | 2009-09-25 23:53:26 +0000 | [diff] [blame] | 4535 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4536 | if (FunctionTemplate) { |
Douglas Gregor | 5505c72 | 2011-01-24 18:54:39 +0000 | [diff] [blame] | 4537 | // Function template with explicit template arguments. |
| 4538 | Diag(D.getIdentifierLoc(), diag::err_function_template_partial_spec) |
| 4539 | << SourceRange(TemplateId->LAngleLoc, TemplateId->RAngleLoc); |
| 4540 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4541 | HasExplicitTemplateArgs = false; |
| 4542 | } else if (!isFunctionTemplateSpecialization && |
| 4543 | !D.getDeclSpec().isFriendSpecified()) { |
| 4544 | // We have encountered something that the user meant to be a |
| 4545 | // specialization (because it has explicitly-specified template |
| 4546 | // arguments) but that was not introduced with a "template<>" (or had |
| 4547 | // too few of them). |
| 4548 | Diag(D.getIdentifierLoc(), diag::err_template_spec_needs_header) |
| 4549 | << SourceRange(TemplateId->LAngleLoc, TemplateId->RAngleLoc) |
| 4550 | << FixItHint::CreateInsertion( |
| 4551 | D.getDeclSpec().getSourceRange().getBegin(), |
| 4552 | "template<> "); |
| 4553 | isFunctionTemplateSpecialization = true; |
John McCall | 29ae6e5 | 2010-10-13 05:45:15 +0000 | [diff] [blame] | 4554 | } else { |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4555 | // "friend void foo<>(int);" is an implicit specialization decl. |
| 4556 | isFunctionTemplateSpecialization = true; |
Francois Pichet | c71d8eb | 2010-10-01 21:19:28 +0000 | [diff] [blame] | 4557 | } |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4558 | } else if (isFriend && isFunctionTemplateSpecialization) { |
| 4559 | // This combination is only possible in a recovery case; the user |
| 4560 | // wrote something like: |
| 4561 | // template <> friend void foo(int); |
| 4562 | // which we're recovering from as if the user had written: |
| 4563 | // friend void foo<>(int); |
| 4564 | // Go ahead and fake up a template id. |
| 4565 | HasExplicitTemplateArgs = true; |
| 4566 | TemplateArgs.setLAngleLoc(D.getIdentifierLoc()); |
| 4567 | TemplateArgs.setRAngleLoc(D.getIdentifierLoc()); |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4568 | } |
John McCall | 29ae6e5 | 2010-10-13 05:45:15 +0000 | [diff] [blame] | 4569 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4570 | // If it's a friend (and only if it's a friend), it's possible |
| 4571 | // that either the specialized function type or the specialized |
| 4572 | // template is dependent, and therefore matching will fail. In |
| 4573 | // this case, don't check the specialization yet. |
| 4574 | if (isFunctionTemplateSpecialization && isFriend && |
| 4575 | (NewFD->getType()->isDependentType() || DC->isDependentContext())) { |
| 4576 | assert(HasExplicitTemplateArgs && |
| 4577 | "friend function specialization without template args"); |
| 4578 | if (CheckDependentFunctionTemplateSpecialization(NewFD, TemplateArgs, |
| 4579 | Previous)) |
| 4580 | NewFD->setInvalidDecl(); |
| 4581 | } else if (isFunctionTemplateSpecialization) { |
Douglas Gregor | eef7ac5 | 2011-03-16 19:27:09 +0000 | [diff] [blame] | 4582 | if (CurContext->isDependentContext() && CurContext->isRecord() |
| 4583 | && !isFriend) { |
| 4584 | Diag(NewFD->getLocation(), diag::err_function_specialization_in_class) |
| 4585 | << NewFD->getDeclName(); |
| 4586 | NewFD->setInvalidDecl(); |
| 4587 | return 0; |
| 4588 | } else if (CheckFunctionTemplateSpecialization(NewFD, |
| 4589 | (HasExplicitTemplateArgs ? &TemplateArgs : 0), |
| 4590 | Previous)) |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4591 | NewFD->setInvalidDecl(); |
| 4592 | } else if (isExplicitSpecialization && isa<CXXMethodDecl>(NewFD)) { |
| 4593 | if (CheckMemberSpecialization(NewFD, Previous)) |
| 4594 | NewFD->setInvalidDecl(); |
| 4595 | } |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4596 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4597 | // Perform semantic checking on the function declaration. |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4598 | CheckFunctionDeclaration(S, NewFD, Previous, isExplicitSpecialization, |
Peter Collingbourne | c80e811 | 2011-01-21 02:08:54 +0000 | [diff] [blame] | 4599 | Redeclaration); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4600 | |
| 4601 | assert((NewFD->isInvalidDecl() || !Redeclaration || |
| 4602 | Previous.getResultKind() != LookupResult::FoundOverloaded) && |
| 4603 | "previous declaration set still overloaded"); |
| 4604 | |
| 4605 | NamedDecl *PrincipalDecl = (FunctionTemplate |
| 4606 | ? cast<NamedDecl>(FunctionTemplate) |
| 4607 | : NewFD); |
| 4608 | |
| 4609 | if (isFriend && Redeclaration) { |
| 4610 | AccessSpecifier Access = AS_public; |
| 4611 | if (!NewFD->isInvalidDecl()) |
| 4612 | Access = NewFD->getPreviousDeclaration()->getAccess(); |
| 4613 | |
| 4614 | NewFD->setAccess(Access); |
| 4615 | if (FunctionTemplate) FunctionTemplate->setAccess(Access); |
| 4616 | |
| 4617 | PrincipalDecl->setObjectOfFriendDecl(true); |
| 4618 | } |
| 4619 | |
| 4620 | if (NewFD->isOverloadedOperator() && !DC->isRecord() && |
| 4621 | PrincipalDecl->isInIdentifierNamespace(Decl::IDNS_Ordinary)) |
| 4622 | PrincipalDecl->setNonMemberOperator(); |
| 4623 | |
| 4624 | // If we have a function template, check the template parameter |
| 4625 | // list. This will check and merge default template arguments. |
| 4626 | if (FunctionTemplate) { |
| 4627 | FunctionTemplateDecl *PrevTemplate = FunctionTemplate->getPreviousDeclaration(); |
| 4628 | CheckTemplateParameterList(FunctionTemplate->getTemplateParameters(), |
| 4629 | PrevTemplate? PrevTemplate->getTemplateParameters() : 0, |
Douglas Gregor | d89d86f | 2011-02-04 04:20:44 +0000 | [diff] [blame] | 4630 | D.getDeclSpec().isFriendSpecified() |
| 4631 | ? (IsFunctionDefinition |
| 4632 | ? TPC_FriendFunctionTemplateDefinition |
| 4633 | : TPC_FriendFunctionTemplate) |
| 4634 | : (D.getCXXScopeSpec().isSet() && |
Douglas Gregor | 461bf2e | 2011-02-04 12:22:53 +0000 | [diff] [blame] | 4635 | DC && DC->isRecord() && |
| 4636 | DC->isDependentContext()) |
Douglas Gregor | d89d86f | 2011-02-04 04:20:44 +0000 | [diff] [blame] | 4637 | ? TPC_ClassTemplateMember |
| 4638 | : TPC_FunctionTemplate); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4639 | } |
| 4640 | |
| 4641 | if (NewFD->isInvalidDecl()) { |
| 4642 | // Ignore all the rest of this. |
| 4643 | } else if (!Redeclaration) { |
| 4644 | // Fake up an access specifier if it's supposed to be a class member. |
| 4645 | if (isa<CXXRecordDecl>(NewFD->getDeclContext())) |
| 4646 | NewFD->setAccess(AS_public); |
| 4647 | |
| 4648 | // Qualified decls generally require a previous declaration. |
| 4649 | if (D.getCXXScopeSpec().isSet()) { |
| 4650 | // ...with the major exception of templated-scope or |
| 4651 | // dependent-scope friend declarations. |
| 4652 | |
| 4653 | // TODO: we currently also suppress this check in dependent |
| 4654 | // contexts because (1) the parameter depth will be off when |
| 4655 | // matching friend templates and (2) we might actually be |
| 4656 | // selecting a friend based on a dependent factor. But there |
| 4657 | // are situations where these conditions don't apply and we |
| 4658 | // can actually do this check immediately. |
| 4659 | if (isFriend && |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 4660 | (TemplateParamLists.size() || |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4661 | D.getCXXScopeSpec().getScopeRep()->isDependent() || |
| 4662 | CurContext->isDependentContext())) { |
| 4663 | // ignore these |
| 4664 | } else { |
| 4665 | // The user tried to provide an out-of-line definition for a |
| 4666 | // function that is a member of a class or namespace, but there |
| 4667 | // was no such member function declared (C++ [class.mfct]p2, |
| 4668 | // C++ [namespace.memdef]p2). For example: |
| 4669 | // |
| 4670 | // class X { |
| 4671 | // void f() const; |
| 4672 | // }; |
| 4673 | // |
| 4674 | // void X::f() { } // ill-formed |
| 4675 | // |
| 4676 | // Complain about this problem, and attempt to suggest close |
| 4677 | // matches (e.g., those that differ only in cv-qualifiers and |
| 4678 | // whether the parameter types are references). |
| 4679 | Diag(D.getIdentifierLoc(), diag::err_member_def_does_not_match) |
| 4680 | << Name << DC << D.getCXXScopeSpec().getRange(); |
| 4681 | NewFD->setInvalidDecl(); |
| 4682 | |
| 4683 | DiagnoseInvalidRedeclaration(*this, NewFD); |
| 4684 | } |
| 4685 | |
| 4686 | // Unqualified local friend declarations are required to resolve |
| 4687 | // to something. |
| 4688 | } else if (isFriend && cast<CXXRecordDecl>(CurContext)->isLocalClass()) { |
| 4689 | Diag(D.getIdentifierLoc(), diag::err_no_matching_local_friend); |
| 4690 | NewFD->setInvalidDecl(); |
| 4691 | DiagnoseInvalidRedeclaration(*this, NewFD); |
| 4692 | } |
| 4693 | |
| 4694 | } else if (!IsFunctionDefinition && D.getCXXScopeSpec().isSet() && |
| 4695 | !isFriend && !isFunctionTemplateSpecialization && |
| 4696 | !isExplicitSpecialization) { |
| 4697 | // An out-of-line member function declaration must also be a |
| 4698 | // definition (C++ [dcl.meaning]p1). |
| 4699 | // Note that this is not the case for explicit specializations of |
| 4700 | // function templates or member functions of class templates, per |
| 4701 | // C++ [temp.expl.spec]p2. We also allow these declarations as an extension |
| 4702 | // for compatibility with old SWIG code which likes to generate them. |
| 4703 | Diag(NewFD->getLocation(), diag::ext_out_of_line_declaration) |
| 4704 | << D.getCXXScopeSpec().getRange(); |
| 4705 | } |
| 4706 | } |
| 4707 | |
| 4708 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4709 | // Handle attributes. We need to have merged decls when handling attributes |
| 4710 | // (for example to check for conflicts, etc). |
| 4711 | // FIXME: This needs to happen before we merge declarations. Then, |
| 4712 | // let attribute merging cope with attribute conflicts. |
Peter Collingbourne | c80e811 | 2011-01-21 02:08:54 +0000 | [diff] [blame] | 4713 | ProcessDeclAttributes(S, NewFD, D, |
| 4714 | /*NonInheritable=*/false, /*Inheritable=*/true); |
Ryan Flynn | 478fbc6 | 2009-07-25 22:29:44 +0000 | [diff] [blame] | 4715 | |
| 4716 | // attributes declared post-definition are currently ignored |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 4717 | // FIXME: This should happen during attribute merging |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4718 | if (Redeclaration && Previous.isSingleResult()) { |
| 4719 | const FunctionDecl *Def; |
| 4720 | FunctionDecl *PrevFD = dyn_cast<FunctionDecl>(Previous.getFoundDecl()); |
Sean Hunt | 10620eb | 2011-05-06 20:44:56 +0000 | [diff] [blame^] | 4721 | if (PrevFD && PrevFD->isDefined(Def) && D.hasAttributes()) { |
Ryan Flynn | 478fbc6 | 2009-07-25 22:29:44 +0000 | [diff] [blame] | 4722 | Diag(NewFD->getLocation(), diag::warn_attribute_precede_definition); |
| 4723 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 4724 | } |
| 4725 | } |
| 4726 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4727 | AddKnownFunctionAttributes(NewFD); |
| 4728 | |
Douglas Gregor | d945538 | 2010-08-06 13:50:58 +0000 | [diff] [blame] | 4729 | if (NewFD->hasAttr<OverloadableAttr>() && |
| 4730 | !NewFD->getType()->getAs<FunctionProtoType>()) { |
| 4731 | Diag(NewFD->getLocation(), |
| 4732 | diag::err_attribute_overloadable_no_prototype) |
| 4733 | << NewFD; |
| 4734 | |
| 4735 | // Turn this into a variadic function with no parameters. |
| 4736 | const FunctionType *FT = NewFD->getType()->getAs<FunctionType>(); |
John McCall | e23cf43 | 2010-12-14 08:05:40 +0000 | [diff] [blame] | 4737 | FunctionProtoType::ExtProtoInfo EPI; |
| 4738 | EPI.Variadic = true; |
| 4739 | EPI.ExtInfo = FT->getExtInfo(); |
| 4740 | |
| 4741 | QualType R = Context.getFunctionType(FT->getResultType(), 0, 0, EPI); |
Douglas Gregor | d945538 | 2010-08-06 13:50:58 +0000 | [diff] [blame] | 4742 | NewFD->setType(R); |
| 4743 | } |
| 4744 | |
Eli Friedman | aa8b0d1 | 2010-08-05 06:57:20 +0000 | [diff] [blame] | 4745 | // If there's a #pragma GCC visibility in scope, and this isn't a class |
| 4746 | // member, set the visibility of this function. |
| 4747 | if (NewFD->getLinkage() == ExternalLinkage && !DC->isRecord()) |
| 4748 | AddPushedVisibilityAttribute(NewFD); |
| 4749 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4750 | // If this is a locally-scoped extern C function, update the |
| 4751 | // map of such names. |
Douglas Gregor | 48a83b5 | 2009-09-12 00:17:51 +0000 | [diff] [blame] | 4752 | if (CurContext->isFunctionOrMethod() && NewFD->isExternC() |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 4753 | && !NewFD->isInvalidDecl()) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4754 | RegisterLocallyScopedExternCDecl(NewFD, Previous, S); |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4755 | |
Argyrios Kyrtzidis | 16f1930 | 2009-06-25 18:22:24 +0000 | [diff] [blame] | 4756 | // Set this FunctionDecl's range up to the right paren. |
Abramo Bagnara | a2026c9 | 2011-03-08 16:41:52 +0000 | [diff] [blame] | 4757 | NewFD->setRangeEnd(D.getSourceRange().getEnd()); |
Argyrios Kyrtzidis | 16f1930 | 2009-06-25 18:22:24 +0000 | [diff] [blame] | 4758 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4759 | if (getLangOptions().CPlusPlus) { |
| 4760 | if (FunctionTemplate) { |
| 4761 | if (NewFD->isInvalidDecl()) |
| 4762 | FunctionTemplate->setInvalidDecl(); |
| 4763 | return FunctionTemplate; |
| 4764 | } |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4765 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4766 | |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 4767 | MarkUnusedFileScopedDecl(NewFD); |
Peter Collingbourne | 14b6ba7 | 2011-02-09 21:04:32 +0000 | [diff] [blame] | 4768 | |
| 4769 | if (getLangOptions().CUDA) |
| 4770 | if (IdentifierInfo *II = NewFD->getIdentifier()) |
| 4771 | if (!NewFD->isInvalidDecl() && |
| 4772 | NewFD->getDeclContext()->getRedeclContext()->isTranslationUnit()) { |
| 4773 | if (II->isStr("cudaConfigureCall")) { |
| 4774 | if (!R->getAs<FunctionType>()->getResultType()->isScalarType()) |
| 4775 | Diag(NewFD->getLocation(), diag::err_config_scalar_return); |
| 4776 | |
| 4777 | Context.setcudaConfigureCallDecl(NewFD); |
| 4778 | } |
| 4779 | } |
| 4780 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4781 | return NewFD; |
| 4782 | } |
| 4783 | |
| 4784 | /// \brief Perform semantic checking of a new function declaration. |
| 4785 | /// |
| 4786 | /// Performs semantic analysis of the new function declaration |
| 4787 | /// NewFD. This routine performs all semantic checking that does not |
| 4788 | /// require the actual declarator involved in the declaration, and is |
| 4789 | /// used both for the declaration of functions as they are parsed |
| 4790 | /// (called via ActOnDeclarator) and for the declaration of functions |
| 4791 | /// that have been instantiated via C++ template instantiation (called |
| 4792 | /// via InstantiateDecl). |
| 4793 | /// |
Douglas Gregor | fd056bc | 2009-10-13 16:30:37 +0000 | [diff] [blame] | 4794 | /// \param IsExplicitSpecialiation whether this new function declaration is |
| 4795 | /// an explicit specialization of the previous declaration. |
| 4796 | /// |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 4797 | /// This sets NewFD->isInvalidDecl() to true if there was an error. |
John McCall | 9f54ad4 | 2009-12-10 09:41:52 +0000 | [diff] [blame] | 4798 | void Sema::CheckFunctionDeclaration(Scope *S, FunctionDecl *NewFD, |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4799 | LookupResult &Previous, |
Douglas Gregor | fd056bc | 2009-10-13 16:30:37 +0000 | [diff] [blame] | 4800 | bool IsExplicitSpecialization, |
Peter Collingbourne | c80e811 | 2011-01-21 02:08:54 +0000 | [diff] [blame] | 4801 | bool &Redeclaration) { |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 4802 | // If NewFD is already known erroneous, don't do any of this checking. |
John McCall | fcadea2 | 2010-08-12 00:57:17 +0000 | [diff] [blame] | 4803 | if (NewFD->isInvalidDecl()) { |
| 4804 | // If this is a class member, mark the class invalid immediately. |
| 4805 | // This avoids some consistency errors later. |
| 4806 | if (isa<CXXMethodDecl>(NewFD)) |
| 4807 | cast<CXXMethodDecl>(NewFD)->getParent()->setInvalidDecl(); |
| 4808 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 4809 | return; |
John McCall | fcadea2 | 2010-08-12 00:57:17 +0000 | [diff] [blame] | 4810 | } |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4811 | |
Eli Friedman | 88f7b57 | 2009-05-16 12:15:55 +0000 | [diff] [blame] | 4812 | if (NewFD->getResultType()->isVariablyModifiedType()) { |
| 4813 | // Functions returning a variably modified type violate C99 6.7.5.2p2 |
| 4814 | // because all functions have linkage. |
| 4815 | Diag(NewFD->getLocation(), diag::err_vm_func_decl); |
| 4816 | return NewFD->setInvalidDecl(); |
| 4817 | } |
| 4818 | |
Douglas Gregor | 48a83b5 | 2009-09-12 00:17:51 +0000 | [diff] [blame] | 4819 | if (NewFD->isMain()) |
| 4820 | CheckMain(NewFD); |
John McCall | 8c4859a | 2009-07-24 03:03:21 +0000 | [diff] [blame] | 4821 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4822 | // Check for a previous declaration of this name. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4823 | if (Previous.empty() && NewFD->isExternC()) { |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 4824 | // Since we did not find anything by this name and we're declaring |
| 4825 | // an extern "C" function, look for a non-visible extern "C" |
| 4826 | // declaration with the same name. |
| 4827 | llvm::DenseMap<DeclarationName, NamedDecl *>::iterator Pos |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4828 | = LocallyScopedExternalDecls.find(NewFD->getDeclName()); |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 4829 | if (Pos != LocallyScopedExternalDecls.end()) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4830 | Previous.addDecl(Pos->second); |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 4831 | } |
| 4832 | |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 4833 | // Merge or overload the declaration with an existing declaration of |
| 4834 | // the same name, if appropriate. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4835 | if (!Previous.empty()) { |
Douglas Gregor | f9201e0 | 2009-02-11 23:02:49 +0000 | [diff] [blame] | 4836 | // Determine whether NewFD is an overload of PrevDecl or |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4837 | // a declaration that requires merging. If it's an overload, |
| 4838 | // there's no more work to do here; we'll just add the new |
| 4839 | // function to the scope. |
Douglas Gregor | ae17094 | 2009-02-13 00:26:38 +0000 | [diff] [blame] | 4840 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4841 | NamedDecl *OldDecl = 0; |
John McCall | 871b2e7 | 2009-12-09 03:35:25 +0000 | [diff] [blame] | 4842 | if (!AllowOverloadingOfFunction(Previous, Context)) { |
| 4843 | Redeclaration = true; |
| 4844 | OldDecl = Previous.getFoundDecl(); |
| 4845 | } else { |
John McCall | ad00b77 | 2010-06-16 08:42:20 +0000 | [diff] [blame] | 4846 | switch (CheckOverload(S, NewFD, Previous, OldDecl, |
| 4847 | /*NewIsUsingDecl*/ false)) { |
John McCall | 871b2e7 | 2009-12-09 03:35:25 +0000 | [diff] [blame] | 4848 | case Ovl_Match: |
John McCall | 9f54ad4 | 2009-12-10 09:41:52 +0000 | [diff] [blame] | 4849 | Redeclaration = true; |
John McCall | 871b2e7 | 2009-12-09 03:35:25 +0000 | [diff] [blame] | 4850 | break; |
| 4851 | |
| 4852 | case Ovl_NonFunction: |
| 4853 | Redeclaration = true; |
| 4854 | break; |
| 4855 | |
| 4856 | case Ovl_Overload: |
| 4857 | Redeclaration = false; |
| 4858 | break; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4859 | } |
Peter Collingbourne | c80e811 | 2011-01-21 02:08:54 +0000 | [diff] [blame] | 4860 | |
| 4861 | if (!getLangOptions().CPlusPlus && !NewFD->hasAttr<OverloadableAttr>()) { |
| 4862 | // If a function name is overloadable in C, then every function |
| 4863 | // with that name must be marked "overloadable". |
| 4864 | Diag(NewFD->getLocation(), diag::err_attribute_overloadable_missing) |
| 4865 | << Redeclaration << NewFD; |
| 4866 | NamedDecl *OverloadedDecl = 0; |
| 4867 | if (Redeclaration) |
| 4868 | OverloadedDecl = OldDecl; |
| 4869 | else if (!Previous.empty()) |
| 4870 | OverloadedDecl = Previous.getRepresentativeDecl(); |
| 4871 | if (OverloadedDecl) |
| 4872 | Diag(OverloadedDecl->getLocation(), |
| 4873 | diag::note_attribute_overloadable_prev_overload); |
| 4874 | NewFD->addAttr(::new (Context) OverloadableAttr(SourceLocation(), |
| 4875 | Context)); |
| 4876 | } |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4877 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4878 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4879 | if (Redeclaration) { |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4880 | // NewFD and OldDecl represent declarations that need to be |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4881 | // merged. |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 4882 | if (MergeFunctionDecl(NewFD, OldDecl)) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 4883 | return NewFD->setInvalidDecl(); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4884 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4885 | Previous.clear(); |
| 4886 | Previous.addDecl(OldDecl); |
| 4887 | |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 4888 | if (FunctionTemplateDecl *OldTemplateDecl |
Douglas Gregor | 37d68185 | 2009-10-12 22:27:17 +0000 | [diff] [blame] | 4889 | = dyn_cast<FunctionTemplateDecl>(OldDecl)) { |
Douglas Gregor | fd056bc | 2009-10-13 16:30:37 +0000 | [diff] [blame] | 4890 | NewFD->setPreviousDeclaration(OldTemplateDecl->getTemplatedDecl()); |
Douglas Gregor | 37d68185 | 2009-10-12 22:27:17 +0000 | [diff] [blame] | 4891 | FunctionTemplateDecl *NewTemplateDecl |
| 4892 | = NewFD->getDescribedFunctionTemplate(); |
| 4893 | assert(NewTemplateDecl && "Template/non-template mismatch"); |
| 4894 | if (CXXMethodDecl *Method |
| 4895 | = dyn_cast<CXXMethodDecl>(NewTemplateDecl->getTemplatedDecl())) { |
| 4896 | Method->setAccess(OldTemplateDecl->getAccess()); |
| 4897 | NewTemplateDecl->setAccess(OldTemplateDecl->getAccess()); |
| 4898 | } |
Douglas Gregor | fd056bc | 2009-10-13 16:30:37 +0000 | [diff] [blame] | 4899 | |
| 4900 | // If this is an explicit specialization of a member that is a function |
| 4901 | // template, mark it as a member specialization. |
| 4902 | if (IsExplicitSpecialization && |
| 4903 | NewTemplateDecl->getInstantiatedFromMemberTemplate()) { |
| 4904 | NewTemplateDecl->setMemberSpecialization(); |
| 4905 | assert(OldTemplateDecl->isMemberSpecialization()); |
| 4906 | } |
Douglas Gregor | 37d68185 | 2009-10-12 22:27:17 +0000 | [diff] [blame] | 4907 | } else { |
Argyrios Kyrtzidis | 9bedef6 | 2009-07-14 03:18:53 +0000 | [diff] [blame] | 4908 | if (isa<CXXMethodDecl>(NewFD)) // Set access for out-of-line definitions |
| 4909 | NewFD->setAccess(OldDecl->getAccess()); |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 4910 | NewFD->setPreviousDeclaration(cast<FunctionDecl>(OldDecl)); |
Argyrios Kyrtzidis | 9bedef6 | 2009-07-14 03:18:53 +0000 | [diff] [blame] | 4911 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4912 | } |
Douglas Gregor | 4ce205f | 2009-02-06 17:46:57 +0000 | [diff] [blame] | 4913 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4914 | |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 4915 | // Semantic checking for this function declaration (in isolation). |
| 4916 | if (getLangOptions().CPlusPlus) { |
| 4917 | // C++-specific checks. |
| 4918 | if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(NewFD)) { |
| 4919 | CheckConstructor(Constructor); |
Anders Carlsson | 6d70139 | 2009-11-15 22:49:34 +0000 | [diff] [blame] | 4920 | } else if (CXXDestructorDecl *Destructor = |
| 4921 | dyn_cast<CXXDestructorDecl>(NewFD)) { |
| 4922 | CXXRecordDecl *Record = Destructor->getParent(); |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 4923 | QualType ClassType = Context.getTypeDeclType(Record); |
Anders Carlsson | 6d70139 | 2009-11-15 22:49:34 +0000 | [diff] [blame] | 4924 | |
Douglas Gregor | 4923aa2 | 2010-07-02 20:37:36 +0000 | [diff] [blame] | 4925 | // FIXME: Shouldn't we be able to perform this check even when the class |
Anders Carlsson | 6d70139 | 2009-11-15 22:49:34 +0000 | [diff] [blame] | 4926 | // type is dependent? Both gcc and edg can handle that. |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 4927 | if (!ClassType->isDependentType()) { |
| 4928 | DeclarationName Name |
| 4929 | = Context.DeclarationNames.getCXXDestructorName( |
| 4930 | Context.getCanonicalType(ClassType)); |
| 4931 | if (NewFD->getDeclName() != Name) { |
| 4932 | Diag(NewFD->getLocation(), diag::err_destructor_name); |
| 4933 | return NewFD->setInvalidDecl(); |
| 4934 | } |
| 4935 | } |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 4936 | } else if (CXXConversionDecl *Conversion |
Douglas Gregor | 4ba3136 | 2009-12-01 17:24:26 +0000 | [diff] [blame] | 4937 | = dyn_cast<CXXConversionDecl>(NewFD)) { |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 4938 | ActOnConversionDeclarator(Conversion); |
Douglas Gregor | 4ba3136 | 2009-12-01 17:24:26 +0000 | [diff] [blame] | 4939 | } |
| 4940 | |
| 4941 | // Find any virtual functions that this function overrides. |
Douglas Gregor | e6342c0 | 2009-12-01 17:35:23 +0000 | [diff] [blame] | 4942 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(NewFD)) { |
| 4943 | if (!Method->isFunctionTemplateSpecialization() && |
Douglas Gregor | a6c1e3a | 2010-10-13 22:55:32 +0000 | [diff] [blame] | 4944 | !Method->getDescribedFunctionTemplate()) { |
| 4945 | if (AddOverriddenMethods(Method->getParent(), Method)) { |
| 4946 | // If the function was marked as "static", we have a problem. |
| 4947 | if (NewFD->getStorageClass() == SC_Static) { |
| 4948 | Diag(NewFD->getLocation(), diag::err_static_overrides_virtual) |
| 4949 | << NewFD->getDeclName(); |
| 4950 | for (CXXMethodDecl::method_iterator |
| 4951 | Overridden = Method->begin_overridden_methods(), |
| 4952 | OverriddenEnd = Method->end_overridden_methods(); |
| 4953 | Overridden != OverriddenEnd; |
| 4954 | ++Overridden) { |
| 4955 | Diag((*Overridden)->getLocation(), |
| 4956 | diag::note_overridden_virtual_function); |
| 4957 | } |
| 4958 | } |
Argyrios Kyrtzidis | 799ef66 | 2011-02-03 18:01:15 +0000 | [diff] [blame] | 4959 | } |
Douglas Gregor | a6c1e3a | 2010-10-13 22:55:32 +0000 | [diff] [blame] | 4960 | } |
Douglas Gregor | e6342c0 | 2009-12-01 17:35:23 +0000 | [diff] [blame] | 4961 | } |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 4962 | |
| 4963 | // Extra checking for C++ overloaded operators (C++ [over.oper]). |
| 4964 | if (NewFD->isOverloadedOperator() && |
| 4965 | CheckOverloadedOperatorDeclaration(NewFD)) |
| 4966 | return NewFD->setInvalidDecl(); |
Sean Hunt | a6c058d | 2010-01-13 09:01:02 +0000 | [diff] [blame] | 4967 | |
| 4968 | // Extra checking for C++0x literal operators (C++0x [over.literal]). |
| 4969 | if (NewFD->getLiteralIdentifier() && |
| 4970 | CheckLiteralOperatorDeclaration(NewFD)) |
| 4971 | return NewFD->setInvalidDecl(); |
| 4972 | |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 4973 | // In C++, check default arguments now that we have merged decls. Unless |
| 4974 | // the lexical context is the class, because in this case this is done |
| 4975 | // during delayed parsing anyway. |
| 4976 | if (!CurContext->isRecord()) |
| 4977 | CheckCXXDefaultArguments(NewFD); |
Douglas Gregor | b68e399 | 2010-12-21 19:47:46 +0000 | [diff] [blame] | 4978 | |
| 4979 | // If this function declares a builtin function, check the type of this |
| 4980 | // declaration against the expected type for the builtin. |
| 4981 | if (unsigned BuiltinID = NewFD->getBuiltinID()) { |
| 4982 | ASTContext::GetBuiltinTypeError Error; |
| 4983 | QualType T = Context.GetBuiltinType(BuiltinID, Error); |
| 4984 | if (!T.isNull() && !Context.hasSameType(T, NewFD->getType())) { |
| 4985 | // The type of this function differs from the type of the builtin, |
| 4986 | // so forget about the builtin entirely. |
| 4987 | Context.BuiltinInfo.ForgetBuiltin(BuiltinID, Context.Idents); |
| 4988 | } |
| 4989 | } |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 4990 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4991 | } |
| 4992 | |
John McCall | 8c4859a | 2009-07-24 03:03:21 +0000 | [diff] [blame] | 4993 | void Sema::CheckMain(FunctionDecl* FD) { |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 4994 | // C++ [basic.start.main]p3: A program that declares main to be inline |
| 4995 | // or static is ill-formed. |
| 4996 | // C99 6.7.4p4: In a hosted environment, the inline function specifier |
| 4997 | // shall not appear in a declaration of main. |
| 4998 | // static main is not an error under C99, but we should warn about it. |
Douglas Gregor | 0130f3c | 2009-10-27 21:01:01 +0000 | [diff] [blame] | 4999 | bool isInline = FD->isInlineSpecified(); |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 5000 | bool isStatic = FD->getStorageClass() == SC_Static; |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 5001 | if (isInline || isStatic) { |
| 5002 | unsigned diagID = diag::warn_unusual_main_decl; |
| 5003 | if (isInline || getLangOptions().CPlusPlus) |
| 5004 | diagID = diag::err_unusual_main_decl; |
| 5005 | |
| 5006 | int which = isStatic + (isInline << 1) - 1; |
| 5007 | Diag(FD->getLocation(), diagID) << which; |
| 5008 | } |
| 5009 | |
| 5010 | QualType T = FD->getType(); |
| 5011 | assert(T->isFunctionType() && "function decl is not of function type"); |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 5012 | const FunctionType* FT = T->getAs<FunctionType>(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5013 | |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 5014 | if (!Context.hasSameUnqualifiedType(FT->getResultType(), Context.IntTy)) { |
Douglas Gregor | 5f39f70 | 2011-02-19 19:04:23 +0000 | [diff] [blame] | 5015 | Diag(FD->getTypeSpecStartLoc(), diag::err_main_returns_nonint); |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 5016 | FD->setInvalidDecl(true); |
| 5017 | } |
| 5018 | |
| 5019 | // Treat protoless main() as nullary. |
| 5020 | if (isa<FunctionNoProtoType>(FT)) return; |
| 5021 | |
| 5022 | const FunctionProtoType* FTP = cast<const FunctionProtoType>(FT); |
| 5023 | unsigned nparams = FTP->getNumArgs(); |
| 5024 | assert(FD->getNumParams() == nparams); |
| 5025 | |
John McCall | 6675586 | 2009-12-24 09:58:38 +0000 | [diff] [blame] | 5026 | bool HasExtraParameters = (nparams > 3); |
| 5027 | |
| 5028 | // Darwin passes an undocumented fourth argument of type char**. If |
| 5029 | // other platforms start sprouting these, the logic below will start |
| 5030 | // getting shifty. |
Daniel Dunbar | db57a4c | 2011-04-19 21:43:27 +0000 | [diff] [blame] | 5031 | if (nparams == 4 && Context.Target.getTriple().isOSDarwin()) |
John McCall | 6675586 | 2009-12-24 09:58:38 +0000 | [diff] [blame] | 5032 | HasExtraParameters = false; |
| 5033 | |
| 5034 | if (HasExtraParameters) { |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 5035 | Diag(FD->getLocation(), diag::err_main_surplus_args) << nparams; |
| 5036 | FD->setInvalidDecl(true); |
| 5037 | nparams = 3; |
| 5038 | } |
| 5039 | |
| 5040 | // FIXME: a lot of the following diagnostics would be improved |
| 5041 | // if we had some location information about types. |
| 5042 | |
| 5043 | QualType CharPP = |
| 5044 | Context.getPointerType(Context.getPointerType(Context.CharTy)); |
John McCall | 6675586 | 2009-12-24 09:58:38 +0000 | [diff] [blame] | 5045 | QualType Expected[] = { Context.IntTy, CharPP, CharPP, CharPP }; |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 5046 | |
| 5047 | for (unsigned i = 0; i < nparams; ++i) { |
| 5048 | QualType AT = FTP->getArgType(i); |
| 5049 | |
| 5050 | bool mismatch = true; |
| 5051 | |
| 5052 | if (Context.hasSameUnqualifiedType(AT, Expected[i])) |
| 5053 | mismatch = false; |
| 5054 | else if (Expected[i] == CharPP) { |
| 5055 | // As an extension, the following forms are okay: |
| 5056 | // char const ** |
| 5057 | // char const * const * |
| 5058 | // char * const * |
| 5059 | |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 5060 | QualifierCollector qs; |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 5061 | const PointerType* PT; |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 5062 | if ((PT = qs.strip(AT)->getAs<PointerType>()) && |
| 5063 | (PT = qs.strip(PT->getPointeeType())->getAs<PointerType>()) && |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 5064 | (QualType(qs.strip(PT->getPointeeType()), 0) == Context.CharTy)) { |
| 5065 | qs.removeConst(); |
| 5066 | mismatch = !qs.empty(); |
| 5067 | } |
| 5068 | } |
| 5069 | |
| 5070 | if (mismatch) { |
| 5071 | Diag(FD->getLocation(), diag::err_main_arg_wrong) << i << Expected[i]; |
| 5072 | // TODO: suggest replacing given type with expected type |
| 5073 | FD->setInvalidDecl(true); |
| 5074 | } |
| 5075 | } |
| 5076 | |
| 5077 | if (nparams == 1 && !FD->isInvalidDecl()) { |
| 5078 | Diag(FD->getLocation(), diag::warn_main_one_arg); |
| 5079 | } |
Douglas Gregor | 0bab54c | 2010-10-21 16:57:46 +0000 | [diff] [blame] | 5080 | |
| 5081 | if (!FD->isInvalidDecl() && FD->getDescribedFunctionTemplate()) { |
| 5082 | Diag(FD->getLocation(), diag::err_main_template_decl); |
| 5083 | FD->setInvalidDecl(); |
| 5084 | } |
John McCall | 8c4859a | 2009-07-24 03:03:21 +0000 | [diff] [blame] | 5085 | } |
| 5086 | |
Eli Friedman | c594b32 | 2008-05-20 13:48:25 +0000 | [diff] [blame] | 5087 | bool Sema::CheckForConstantInitializer(Expr *Init, QualType DclT) { |
Eli Friedman | 3b8a36a | 2009-02-27 04:17:12 +0000 | [diff] [blame] | 5088 | // FIXME: Need strict checking. In C89, we need to check for |
| 5089 | // any assignment, increment, decrement, function-calls, or |
| 5090 | // commas outside of a sizeof. In C99, it's the same list, |
| 5091 | // except that the aforementioned are allowed in unevaluated |
| 5092 | // expressions. Everything else falls under the |
| 5093 | // "may accept other forms of constant expressions" exception. |
| 5094 | // (We never end up here for C++, so the constant expression |
| 5095 | // rules there don't matter.) |
John McCall | 4204f07 | 2010-08-02 21:13:48 +0000 | [diff] [blame] | 5096 | if (Init->isConstantInitializer(Context, false)) |
Eli Friedman | 578a972 | 2009-02-22 06:45:27 +0000 | [diff] [blame] | 5097 | return false; |
Eli Friedman | 2129828 | 2009-02-26 04:47:58 +0000 | [diff] [blame] | 5098 | Diag(Init->getExprLoc(), diag::err_init_element_not_constant) |
| 5099 | << Init->getSourceRange(); |
Eli Friedman | c594b32 | 2008-05-20 13:48:25 +0000 | [diff] [blame] | 5100 | return true; |
Steve Naroff | d0091aa | 2008-01-10 22:15:12 +0000 | [diff] [blame] | 5101 | } |
| 5102 | |
Chandler Carruth | a7689ef | 2011-03-27 09:46:56 +0000 | [diff] [blame] | 5103 | namespace { |
| 5104 | // Visits an initialization expression to see if OrigDecl is evaluated in |
| 5105 | // its own initialization and throws a warning if it does. |
| 5106 | class SelfReferenceChecker |
| 5107 | : public EvaluatedExprVisitor<SelfReferenceChecker> { |
| 5108 | Sema &S; |
| 5109 | Decl *OrigDecl; |
| 5110 | |
| 5111 | public: |
| 5112 | typedef EvaluatedExprVisitor<SelfReferenceChecker> Inherited; |
| 5113 | |
| 5114 | SelfReferenceChecker(Sema &S, Decl *OrigDecl) : Inherited(S.Context), |
| 5115 | S(S), OrigDecl(OrigDecl) { } |
| 5116 | |
| 5117 | void VisitExpr(Expr *E) { |
| 5118 | if (isa<ObjCMessageExpr>(*E)) return; |
| 5119 | Inherited::VisitExpr(E); |
| 5120 | } |
| 5121 | |
| 5122 | void VisitImplicitCastExpr(ImplicitCastExpr *E) { |
| 5123 | CheckForSelfReference(E); |
| 5124 | Inherited::VisitImplicitCastExpr(E); |
| 5125 | } |
| 5126 | |
| 5127 | void CheckForSelfReference(ImplicitCastExpr *E) { |
| 5128 | if (E->getCastKind() != CK_LValueToRValue) return; |
| 5129 | Expr* SubExpr = E->getSubExpr()->IgnoreParenImpCasts(); |
| 5130 | DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(SubExpr); |
| 5131 | if (!DRE) return; |
| 5132 | Decl* ReferenceDecl = DRE->getDecl(); |
| 5133 | if (OrigDecl != ReferenceDecl) return; |
| 5134 | LookupResult Result(S, DRE->getNameInfo(), Sema::LookupOrdinaryName, |
| 5135 | Sema::NotForRedeclaration); |
| 5136 | S.Diag(SubExpr->getLocStart(), diag::warn_uninit_self_reference_in_init) |
| 5137 | << Result.getLookupName() << OrigDecl->getLocation() |
| 5138 | << SubExpr->getSourceRange(); |
| 5139 | } |
| 5140 | }; |
| 5141 | } |
| 5142 | |
Douglas Gregor | 09f41cf | 2009-01-14 15:45:31 +0000 | [diff] [blame] | 5143 | /// AddInitializerToDecl - Adds the initializer Init to the |
| 5144 | /// declaration dcl. If DirectInit is true, this is C++ direct |
| 5145 | /// initialization rather than copy initialization. |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 5146 | void Sema::AddInitializerToDecl(Decl *RealDecl, Expr *Init, |
| 5147 | bool DirectInit, bool TypeMayContainAuto) { |
Chris Lattner | 9a11b9a | 2007-10-19 20:10:30 +0000 | [diff] [blame] | 5148 | // If there is no declaration, there was an error parsing it. Just ignore |
| 5149 | // the initializer. |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 5150 | if (RealDecl == 0 || RealDecl->isInvalidDecl()) |
Chris Lattner | 9a11b9a | 2007-10-19 20:10:30 +0000 | [diff] [blame] | 5151 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5152 | |
Ted Kremenek | d40066b | 2011-04-04 23:29:12 +0000 | [diff] [blame] | 5153 | // Check for self-references within variable initializers. |
| 5154 | if (VarDecl *vd = dyn_cast<VarDecl>(RealDecl)) { |
| 5155 | // Variables declared within a function/method body are handled |
| 5156 | // by a dataflow analysis. |
| 5157 | if (!vd->hasLocalStorage() && !vd->isStaticLocal()) |
| 5158 | SelfReferenceChecker(*this, RealDecl).VisitExpr(Init); |
| 5159 | } |
| 5160 | else { |
| 5161 | SelfReferenceChecker(*this, RealDecl).VisitExpr(Init); |
| 5162 | } |
Chandler Carruth | a7689ef | 2011-03-27 09:46:56 +0000 | [diff] [blame] | 5163 | |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 5164 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(RealDecl)) { |
| 5165 | // With declarators parsed the way they are, the parser cannot |
| 5166 | // distinguish between a normal initializer and a pure-specifier. |
| 5167 | // Thus this grotesque test. |
| 5168 | IntegerLiteral *IL; |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 5169 | if ((IL = dyn_cast<IntegerLiteral>(Init)) && IL->getValue() == 0 && |
Douglas Gregor | 4ba3136 | 2009-12-01 17:24:26 +0000 | [diff] [blame] | 5170 | Context.getCanonicalType(IL->getType()) == Context.IntTy) |
| 5171 | CheckPureMethod(Method, Init->getSourceRange()); |
| 5172 | else { |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 5173 | Diag(Method->getLocation(), diag::err_member_function_initialization) |
| 5174 | << Method->getDeclName() << Init->getSourceRange(); |
| 5175 | Method->setInvalidDecl(); |
| 5176 | } |
| 5177 | return; |
| 5178 | } |
| 5179 | |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 5180 | VarDecl *VDecl = dyn_cast<VarDecl>(RealDecl); |
| 5181 | if (!VDecl) { |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 5182 | if (getLangOptions().CPlusPlus && |
| 5183 | RealDecl->getLexicalDeclContext()->isRecord() && |
| 5184 | isa<NamedDecl>(RealDecl)) |
John McCall | 4e63564 | 2010-09-10 23:21:22 +0000 | [diff] [blame] | 5185 | Diag(RealDecl->getLocation(), diag::err_member_initialization); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 5186 | else |
| 5187 | Diag(RealDecl->getLocation(), diag::err_illegal_initializer); |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 5188 | RealDecl->setInvalidDecl(); |
| 5189 | return; |
Eli Friedman | 3b8a36a | 2009-02-27 04:17:12 +0000 | [diff] [blame] | 5190 | } |
| 5191 | |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 5192 | // C++0x [decl.spec.auto]p6. Deduce the type which 'auto' stands in for. |
| 5193 | if (TypeMayContainAuto && VDecl->getType()->getContainedAutoType()) { |
Richard Smith | a085da8 | 2011-03-17 16:11:59 +0000 | [diff] [blame] | 5194 | TypeSourceInfo *DeducedType = 0; |
| 5195 | if (!DeduceAutoType(VDecl->getTypeSourceInfo(), Init, DeducedType)) |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 5196 | Diag(VDecl->getLocation(), diag::err_auto_var_deduction_failure) |
| 5197 | << VDecl->getDeclName() << VDecl->getType() << Init->getType() |
| 5198 | << Init->getSourceRange(); |
Richard Smith | a085da8 | 2011-03-17 16:11:59 +0000 | [diff] [blame] | 5199 | if (!DeducedType) { |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 5200 | RealDecl->setInvalidDecl(); |
| 5201 | return; |
| 5202 | } |
Richard Smith | a085da8 | 2011-03-17 16:11:59 +0000 | [diff] [blame] | 5203 | VDecl->setTypeSourceInfo(DeducedType); |
| 5204 | VDecl->setType(DeducedType->getType()); |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 5205 | |
| 5206 | // If this is a redeclaration, check that the type we just deduced matches |
| 5207 | // the previously declared type. |
| 5208 | if (VarDecl *Old = VDecl->getPreviousDeclaration()) |
| 5209 | MergeVarDeclTypes(VDecl, Old); |
| 5210 | } |
Douglas Gregor | 3a91abf | 2010-08-24 05:27:49 +0000 | [diff] [blame] | 5211 | |
| 5212 | |
Eli Friedman | 49e2b8e | 2009-11-14 03:40:14 +0000 | [diff] [blame] | 5213 | // A definition must end up with a complete type, which means it must be |
| 5214 | // complete with the restriction that an array type might be completed by the |
| 5215 | // initializer; note that later code assumes this restriction. |
| 5216 | QualType BaseDeclType = VDecl->getType(); |
| 5217 | if (const ArrayType *Array = Context.getAsIncompleteArrayType(BaseDeclType)) |
| 5218 | BaseDeclType = Array->getElementType(); |
| 5219 | if (RequireCompleteType(VDecl->getLocation(), BaseDeclType, |
Eli Friedman | a31feca | 2009-04-13 21:28:54 +0000 | [diff] [blame] | 5220 | diag::err_typecheck_decl_incomplete_type)) { |
| 5221 | RealDecl->setInvalidDecl(); |
| 5222 | return; |
| 5223 | } |
| 5224 | |
Douglas Gregor | 1ab537b | 2009-12-03 18:33:45 +0000 | [diff] [blame] | 5225 | // The variable can not have an abstract class type. |
| 5226 | if (RequireNonAbstractType(VDecl->getLocation(), VDecl->getType(), |
| 5227 | diag::err_abstract_type_in_decl, |
| 5228 | AbstractVariableType)) |
| 5229 | VDecl->setInvalidDecl(); |
| 5230 | |
Sebastian Redl | 31310a2 | 2010-02-01 20:16:42 +0000 | [diff] [blame] | 5231 | const VarDecl *Def; |
| 5232 | if ((Def = VDecl->getDefinition()) && Def != VDecl) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5233 | Diag(VDecl->getLocation(), diag::err_redefinition) |
Douglas Gregor | 275a369 | 2009-03-10 23:43:53 +0000 | [diff] [blame] | 5234 | << VDecl->getDeclName(); |
| 5235 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 5236 | VDecl->setInvalidDecl(); |
| 5237 | return; |
| 5238 | } |
Douglas Gregor | 3a91abf | 2010-08-24 05:27:49 +0000 | [diff] [blame] | 5239 | |
Douglas Gregor | 3a91abf | 2010-08-24 05:27:49 +0000 | [diff] [blame] | 5240 | const VarDecl* PrevInit = 0; |
Douglas Gregor | a31040f | 2010-12-16 01:31:22 +0000 | [diff] [blame] | 5241 | if (getLangOptions().CPlusPlus) { |
| 5242 | // C++ [class.static.data]p4 |
| 5243 | // If a static data member is of const integral or const |
| 5244 | // enumeration type, its declaration in the class definition can |
| 5245 | // specify a constant-initializer which shall be an integral |
| 5246 | // constant expression (5.19). In that case, the member can appear |
| 5247 | // in integral constant expressions. The member shall still be |
| 5248 | // defined in a namespace scope if it is used in the program and the |
| 5249 | // namespace scope definition shall not contain an initializer. |
| 5250 | // |
| 5251 | // We already performed a redefinition check above, but for static |
| 5252 | // data members we also need to check whether there was an in-class |
| 5253 | // declaration with an initializer. |
| 5254 | if (VDecl->isStaticDataMember() && VDecl->getAnyInitializer(PrevInit)) { |
| 5255 | Diag(VDecl->getLocation(), diag::err_redefinition) << VDecl->getDeclName(); |
| 5256 | Diag(PrevInit->getLocation(), diag::note_previous_definition); |
| 5257 | return; |
| 5258 | } |
Douglas Gregor | 275a369 | 2009-03-10 23:43:53 +0000 | [diff] [blame] | 5259 | |
Douglas Gregor | a31040f | 2010-12-16 01:31:22 +0000 | [diff] [blame] | 5260 | if (VDecl->hasLocalStorage()) |
| 5261 | getCurFunction()->setHasBranchProtectedScope(); |
| 5262 | |
| 5263 | if (DiagnoseUnexpandedParameterPack(Init, UPPC_Initializer)) { |
| 5264 | VDecl->setInvalidDecl(); |
| 5265 | return; |
| 5266 | } |
| 5267 | } |
John McCall | e46f62c | 2010-08-01 01:24:59 +0000 | [diff] [blame] | 5268 | |
Douglas Gregor | 99a2e60 | 2009-12-16 01:38:02 +0000 | [diff] [blame] | 5269 | // Capture the variable that is being initialized and the style of |
| 5270 | // initialization. |
| 5271 | InitializedEntity Entity = InitializedEntity::InitializeVariable(VDecl); |
| 5272 | |
| 5273 | // FIXME: Poor source location information. |
| 5274 | InitializationKind Kind |
| 5275 | = DirectInit? InitializationKind::CreateDirect(VDecl->getLocation(), |
| 5276 | Init->getLocStart(), |
| 5277 | Init->getLocEnd()) |
| 5278 | : InitializationKind::CreateCopy(VDecl->getLocation(), |
| 5279 | Init->getLocStart()); |
| 5280 | |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 5281 | // Get the decls type and save a reference for later, since |
Steve Naroff | d0091aa | 2008-01-10 22:15:12 +0000 | [diff] [blame] | 5282 | // CheckInitializerTypes may change it. |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 5283 | QualType DclT = VDecl->getType(), SavT = DclT; |
John McCall | b6bbcc9 | 2010-10-15 04:57:14 +0000 | [diff] [blame] | 5284 | if (VDecl->isLocalVarDecl()) { |
Daniel Dunbar | 5466c7b | 2009-04-14 02:25:56 +0000 | [diff] [blame] | 5285 | if (VDecl->hasExternalStorage()) { // C99 6.7.8p5 |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 5286 | Diag(VDecl->getLocation(), diag::err_block_extern_cant_init); |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 5287 | VDecl->setInvalidDecl(); |
| 5288 | } else if (!VDecl->isInvalidDecl()) { |
Eli Friedman | cfdc81a | 2009-12-19 08:11:05 +0000 | [diff] [blame] | 5289 | InitializationSequence InitSeq(*this, Entity, Kind, &Init, 1); |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 5290 | ExprResult Result = InitSeq.Perform(*this, Entity, Kind, |
John McCall | ca0408f | 2010-08-23 06:44:23 +0000 | [diff] [blame] | 5291 | MultiExprArg(*this, &Init, 1), |
Eli Friedman | a91eb54 | 2009-12-22 02:10:53 +0000 | [diff] [blame] | 5292 | &DclT); |
| 5293 | if (Result.isInvalid()) { |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 5294 | VDecl->setInvalidDecl(); |
Eli Friedman | cfdc81a | 2009-12-19 08:11:05 +0000 | [diff] [blame] | 5295 | return; |
| 5296 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5297 | |
Eli Friedman | a91eb54 | 2009-12-22 02:10:53 +0000 | [diff] [blame] | 5298 | Init = Result.takeAs<Expr>(); |
| 5299 | |
Anders Carlsson | c5eb731 | 2008-08-22 05:00:02 +0000 | [diff] [blame] | 5300 | // C++ 3.6.2p2, allow dynamic initialization of static initializers. |
Eli Friedman | da15323 | 2009-02-20 01:34:21 +0000 | [diff] [blame] | 5301 | // Don't check invalid declarations to avoid emitting useless diagnostics. |
| 5302 | if (!getLangOptions().CPlusPlus && !VDecl->isInvalidDecl()) { |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 5303 | if (VDecl->getStorageClass() == SC_Static) // C99 6.7.8p4. |
Anders Carlsson | c5eb731 | 2008-08-22 05:00:02 +0000 | [diff] [blame] | 5304 | CheckForConstantInitializer(Init, DclT); |
| 5305 | } |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 5306 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5307 | } else if (VDecl->isStaticDataMember() && |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 5308 | VDecl->getLexicalDeclContext()->isRecord()) { |
| 5309 | // This is an in-class initialization for a static data member, e.g., |
| 5310 | // |
| 5311 | // struct S { |
| 5312 | // static const int value = 17; |
| 5313 | // }; |
| 5314 | |
John McCall | 4e63564 | 2010-09-10 23:21:22 +0000 | [diff] [blame] | 5315 | // Try to perform the initialization regardless. |
| 5316 | if (!VDecl->isInvalidDecl()) { |
| 5317 | InitializationSequence InitSeq(*this, Entity, Kind, &Init, 1); |
| 5318 | ExprResult Result = InitSeq.Perform(*this, Entity, Kind, |
| 5319 | MultiExprArg(*this, &Init, 1), |
| 5320 | &DclT); |
| 5321 | if (Result.isInvalid()) { |
| 5322 | VDecl->setInvalidDecl(); |
| 5323 | return; |
| 5324 | } |
| 5325 | |
| 5326 | Init = Result.takeAs<Expr>(); |
| 5327 | } |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 5328 | |
| 5329 | // C++ [class.mem]p4: |
| 5330 | // A member-declarator can contain a constant-initializer only |
| 5331 | // if it declares a static member (9.4) of const integral or |
| 5332 | // const enumeration type, see 9.4.2. |
| 5333 | QualType T = VDecl->getType(); |
John McCall | 4e63564 | 2010-09-10 23:21:22 +0000 | [diff] [blame] | 5334 | |
| 5335 | // Do nothing on dependent types. |
| 5336 | if (T->isDependentType()) { |
| 5337 | |
| 5338 | // Require constness. |
| 5339 | } else if (!T.isConstQualified()) { |
| 5340 | Diag(VDecl->getLocation(), diag::err_in_class_initializer_non_const) |
| 5341 | << Init->getSourceRange(); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 5342 | VDecl->setInvalidDecl(); |
John McCall | 4e63564 | 2010-09-10 23:21:22 +0000 | [diff] [blame] | 5343 | |
| 5344 | // We allow integer constant expressions in all cases. |
| 5345 | } else if (T->isIntegralOrEnumerationType()) { |
| 5346 | if (!Init->isValueDependent()) { |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 5347 | // Check whether the expression is a constant expression. |
| 5348 | llvm::APSInt Value; |
| 5349 | SourceLocation Loc; |
| 5350 | if (!Init->isIntegerConstantExpr(Value, Context, &Loc)) { |
| 5351 | Diag(Loc, diag::err_in_class_initializer_non_constant) |
| 5352 | << Init->getSourceRange(); |
| 5353 | VDecl->setInvalidDecl(); |
John McCall | 4e63564 | 2010-09-10 23:21:22 +0000 | [diff] [blame] | 5354 | } |
| 5355 | } |
| 5356 | |
| 5357 | // We allow floating-point constants as an extension in C++03, and |
| 5358 | // C++0x has far more complicated rules that we don't really |
| 5359 | // implement fully. |
| 5360 | } else { |
| 5361 | bool Allowed = false; |
| 5362 | if (getLangOptions().CPlusPlus0x) { |
| 5363 | Allowed = T->isLiteralType(); |
| 5364 | } else if (T->isFloatingType()) { // also permits complex, which is ok |
| 5365 | Diag(VDecl->getLocation(), diag::ext_in_class_initializer_float_type) |
| 5366 | << T << Init->getSourceRange(); |
| 5367 | Allowed = true; |
| 5368 | } |
| 5369 | |
| 5370 | if (!Allowed) { |
| 5371 | Diag(VDecl->getLocation(), diag::err_in_class_initializer_bad_type) |
| 5372 | << T << Init->getSourceRange(); |
| 5373 | VDecl->setInvalidDecl(); |
| 5374 | |
| 5375 | // TODO: there are probably expressions that pass here that shouldn't. |
| 5376 | } else if (!Init->isValueDependent() && |
| 5377 | !Init->isConstantInitializer(Context, false)) { |
| 5378 | Diag(Init->getExprLoc(), diag::err_in_class_initializer_non_constant) |
| 5379 | << Init->getSourceRange(); |
| 5380 | VDecl->setInvalidDecl(); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 5381 | } |
| 5382 | } |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 5383 | } else if (VDecl->isFileVarDecl()) { |
Douglas Gregor | 66c42d4 | 2010-10-15 01:21:46 +0000 | [diff] [blame] | 5384 | if (VDecl->getStorageClassAsWritten() == SC_Extern && |
Douglas Gregor | 66dd939 | 2010-04-22 14:36:26 +0000 | [diff] [blame] | 5385 | (!getLangOptions().CPlusPlus || |
| 5386 | !Context.getBaseElementType(VDecl->getType()).isConstQualified())) |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 5387 | Diag(VDecl->getLocation(), diag::warn_extern_init); |
Eli Friedman | a91eb54 | 2009-12-22 02:10:53 +0000 | [diff] [blame] | 5388 | if (!VDecl->isInvalidDecl()) { |
| 5389 | InitializationSequence InitSeq(*this, Entity, Kind, &Init, 1); |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 5390 | ExprResult Result = InitSeq.Perform(*this, Entity, Kind, |
John McCall | ca0408f | 2010-08-23 06:44:23 +0000 | [diff] [blame] | 5391 | MultiExprArg(*this, &Init, 1), |
Eli Friedman | a91eb54 | 2009-12-22 02:10:53 +0000 | [diff] [blame] | 5392 | &DclT); |
| 5393 | if (Result.isInvalid()) { |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 5394 | VDecl->setInvalidDecl(); |
Eli Friedman | a91eb54 | 2009-12-22 02:10:53 +0000 | [diff] [blame] | 5395 | return; |
| 5396 | } |
| 5397 | |
| 5398 | Init = Result.takeAs<Expr>(); |
| 5399 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5400 | |
Anders Carlsson | c5eb731 | 2008-08-22 05:00:02 +0000 | [diff] [blame] | 5401 | // C++ 3.6.2p2, allow dynamic initialization of static initializers. |
Eli Friedman | da15323 | 2009-02-20 01:34:21 +0000 | [diff] [blame] | 5402 | // Don't check invalid declarations to avoid emitting useless diagnostics. |
| 5403 | if (!getLangOptions().CPlusPlus && !VDecl->isInvalidDecl()) { |
Anders Carlsson | c5eb731 | 2008-08-22 05:00:02 +0000 | [diff] [blame] | 5404 | // C99 6.7.8p4. All file scoped initializers need to be constant. |
| 5405 | CheckForConstantInitializer(Init, DclT); |
| 5406 | } |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 5407 | } |
| 5408 | // If the type changed, it means we had an incomplete type that was |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5409 | // completed by the initializer. For example: |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 5410 | // int ary[] = { 1, 3, 5 }; |
| 5411 | // "ary" transitions from a VariableArrayType to a ConstantArrayType. |
Christopher Lamb | 48b1239 | 2007-11-29 19:09:19 +0000 | [diff] [blame] | 5412 | if (!VDecl->isInvalidDecl() && (DclT != SavT)) { |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 5413 | VDecl->setType(DclT); |
Christopher Lamb | 48b1239 | 2007-11-29 19:09:19 +0000 | [diff] [blame] | 5414 | Init->setType(DclT); |
| 5415 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5416 | |
Chris Lattner | 16c5dea | 2010-10-10 18:16:20 +0000 | [diff] [blame] | 5417 | |
| 5418 | // If this variable is a local declaration with record type, make sure it |
| 5419 | // doesn't have a flexible member initialization. We only support this as a |
| 5420 | // global/static definition. |
| 5421 | if (VDecl->hasLocalStorage()) |
| 5422 | if (const RecordType *RT = VDecl->getType()->getAs<RecordType>()) |
Douglas Gregor | c6eddf5 | 2010-10-15 23:53:28 +0000 | [diff] [blame] | 5423 | if (RT->getDecl()->hasFlexibleArrayMember()) { |
| 5424 | // Check whether the initializer tries to initialize the flexible |
| 5425 | // array member itself to anything other than an empty initializer list. |
| 5426 | if (InitListExpr *ILE = dyn_cast<InitListExpr>(Init)) { |
| 5427 | unsigned Index = std::distance(RT->getDecl()->field_begin(), |
| 5428 | RT->getDecl()->field_end()) - 1; |
| 5429 | if (Index < ILE->getNumInits() && |
| 5430 | !(isa<InitListExpr>(ILE->getInit(Index)) && |
| 5431 | cast<InitListExpr>(ILE->getInit(Index))->getNumInits() == 0)) { |
| 5432 | Diag(VDecl->getLocation(), diag::err_nonstatic_flexible_variable); |
| 5433 | VDecl->setInvalidDecl(); |
| 5434 | } |
| 5435 | } |
Chris Lattner | 16c5dea | 2010-10-10 18:16:20 +0000 | [diff] [blame] | 5436 | } |
| 5437 | |
John McCall | b4eb64d | 2010-10-08 02:01:28 +0000 | [diff] [blame] | 5438 | // Check any implicit conversions within the expression. |
| 5439 | CheckImplicitConversions(Init, VDecl->getLocation()); |
| 5440 | |
John McCall | 4765fa0 | 2010-12-06 08:20:24 +0000 | [diff] [blame] | 5441 | Init = MaybeCreateExprWithCleanups(Init); |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 5442 | // Attach the initializer to the decl. |
Douglas Gregor | 838db38 | 2010-02-11 01:19:42 +0000 | [diff] [blame] | 5443 | VDecl->setInit(Init); |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 5444 | |
John McCall | 2998d6b | 2011-01-19 11:48:09 +0000 | [diff] [blame] | 5445 | CheckCompleteVariableDeclaration(VDecl); |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 5446 | } |
| 5447 | |
John McCall | 7727acf | 2010-03-31 02:13:20 +0000 | [diff] [blame] | 5448 | /// ActOnInitializerError - Given that there was an error parsing an |
| 5449 | /// initializer for the given declaration, try to return to some form |
| 5450 | /// of sanity. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 5451 | void Sema::ActOnInitializerError(Decl *D) { |
John McCall | 7727acf | 2010-03-31 02:13:20 +0000 | [diff] [blame] | 5452 | // Our main concern here is re-establishing invariants like "a |
| 5453 | // variable's type is either dependent or complete". |
John McCall | 7727acf | 2010-03-31 02:13:20 +0000 | [diff] [blame] | 5454 | if (!D || D->isInvalidDecl()) return; |
| 5455 | |
| 5456 | VarDecl *VD = dyn_cast<VarDecl>(D); |
| 5457 | if (!VD) return; |
| 5458 | |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 5459 | // Auto types are meaningless if we can't make sense of the initializer. |
Richard Smith | 483b9f3 | 2011-02-21 20:05:19 +0000 | [diff] [blame] | 5460 | if (ParsingInitForAutoVars.count(D)) { |
| 5461 | D->setInvalidDecl(); |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 5462 | return; |
| 5463 | } |
| 5464 | |
John McCall | 7727acf | 2010-03-31 02:13:20 +0000 | [diff] [blame] | 5465 | QualType Ty = VD->getType(); |
| 5466 | if (Ty->isDependentType()) return; |
| 5467 | |
| 5468 | // Require a complete type. |
| 5469 | if (RequireCompleteType(VD->getLocation(), |
| 5470 | Context.getBaseElementType(Ty), |
| 5471 | diag::err_typecheck_decl_incomplete_type)) { |
| 5472 | VD->setInvalidDecl(); |
| 5473 | return; |
| 5474 | } |
| 5475 | |
| 5476 | // Require an abstract type. |
| 5477 | if (RequireNonAbstractType(VD->getLocation(), Ty, |
| 5478 | diag::err_abstract_type_in_decl, |
| 5479 | AbstractVariableType)) { |
| 5480 | VD->setInvalidDecl(); |
| 5481 | return; |
| 5482 | } |
| 5483 | |
| 5484 | // Don't bother complaining about constructors or destructors, |
| 5485 | // though. |
| 5486 | } |
| 5487 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 5488 | void Sema::ActOnUninitializedDecl(Decl *RealDecl, |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 5489 | bool TypeMayContainAuto) { |
Argyrios Kyrtzidis | 48c2e90 | 2008-11-07 13:01:22 +0000 | [diff] [blame] | 5490 | // If there is no declaration, there was an error parsing it. Just ignore it. |
| 5491 | if (RealDecl == 0) |
| 5492 | return; |
| 5493 | |
Douglas Gregor | 27c8dc0 | 2008-10-29 00:13:59 +0000 | [diff] [blame] | 5494 | if (VarDecl *Var = dyn_cast<VarDecl>(RealDecl)) { |
| 5495 | QualType Type = Var->getType(); |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 5496 | |
Anders Carlsson | 6a75cd9 | 2009-07-11 00:34:39 +0000 | [diff] [blame] | 5497 | // C++0x [dcl.spec.auto]p3 |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 5498 | if (TypeMayContainAuto && Type->getContainedAutoType()) { |
Anders Carlsson | 6a75cd9 | 2009-07-11 00:34:39 +0000 | [diff] [blame] | 5499 | Diag(Var->getLocation(), diag::err_auto_var_requires_init) |
| 5500 | << Var->getDeclName() << Type; |
| 5501 | Var->setInvalidDecl(); |
| 5502 | return; |
| 5503 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5504 | |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 5505 | switch (Var->isThisDeclarationADefinition()) { |
| 5506 | case VarDecl::Definition: |
| 5507 | if (!Var->isStaticDataMember() || !Var->getAnyInitializer()) |
| 5508 | break; |
| 5509 | |
| 5510 | // We have an out-of-line definition of a static data member |
| 5511 | // that has an in-class initializer, so we type-check this like |
| 5512 | // a declaration. |
| 5513 | // |
| 5514 | // Fall through |
| 5515 | |
| 5516 | case VarDecl::DeclarationOnly: |
| 5517 | // It's only a declaration. |
| 5518 | |
| 5519 | // Block scope. C99 6.7p7: If an identifier for an object is |
| 5520 | // declared with no linkage (C99 6.2.2p6), the type for the |
| 5521 | // object shall be complete. |
John McCall | b6bbcc9 | 2010-10-15 04:57:14 +0000 | [diff] [blame] | 5522 | if (!Type->isDependentType() && Var->isLocalVarDecl() && |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 5523 | !Var->getLinkage() && !Var->isInvalidDecl() && |
| 5524 | RequireCompleteType(Var->getLocation(), Type, |
| 5525 | diag::err_typecheck_decl_incomplete_type)) |
| 5526 | Var->setInvalidDecl(); |
| 5527 | |
| 5528 | // Make sure that the type is not abstract. |
| 5529 | if (!Type->isDependentType() && !Var->isInvalidDecl() && |
| 5530 | RequireNonAbstractType(Var->getLocation(), Type, |
| 5531 | diag::err_abstract_type_in_decl, |
| 5532 | AbstractVariableType)) |
| 5533 | Var->setInvalidDecl(); |
| 5534 | return; |
| 5535 | |
| 5536 | case VarDecl::TentativeDefinition: |
| 5537 | // File scope. C99 6.9.2p2: A declaration of an identifier for an |
| 5538 | // object that has file scope without an initializer, and without a |
| 5539 | // storage-class specifier or with the storage-class specifier "static", |
| 5540 | // constitutes a tentative definition. Note: A tentative definition with |
| 5541 | // external linkage is valid (C99 6.2.2p5). |
| 5542 | if (!Var->isInvalidDecl()) { |
| 5543 | if (const IncompleteArrayType *ArrayT |
| 5544 | = Context.getAsIncompleteArrayType(Type)) { |
| 5545 | if (RequireCompleteType(Var->getLocation(), |
| 5546 | ArrayT->getElementType(), |
| 5547 | diag::err_illegal_decl_array_incomplete_type)) |
| 5548 | Var->setInvalidDecl(); |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 5549 | } else if (Var->getStorageClass() == SC_Static) { |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 5550 | // C99 6.9.2p3: If the declaration of an identifier for an object is |
| 5551 | // a tentative definition and has internal linkage (C99 6.2.2p3), the |
| 5552 | // declared type shall not be an incomplete type. |
| 5553 | // NOTE: code such as the following |
| 5554 | // static struct s; |
| 5555 | // struct s { int a; }; |
| 5556 | // is accepted by gcc. Hence here we issue a warning instead of |
| 5557 | // an error and we do not invalidate the static declaration. |
| 5558 | // NOTE: to avoid multiple warnings, only check the first declaration. |
| 5559 | if (Var->getPreviousDeclaration() == 0) |
| 5560 | RequireCompleteType(Var->getLocation(), Type, |
| 5561 | diag::ext_typecheck_decl_incomplete_type); |
| 5562 | } |
| 5563 | } |
| 5564 | |
| 5565 | // Record the tentative definition; we're done. |
| 5566 | if (!Var->isInvalidDecl()) |
| 5567 | TentativeDefinitions.push_back(Var); |
| 5568 | return; |
| 5569 | } |
| 5570 | |
| 5571 | // Provide a specific diagnostic for uninitialized variable |
| 5572 | // definitions with incomplete array type. |
| 5573 | if (Type->isIncompleteArrayType()) { |
Sebastian Redl | 6e82475 | 2009-11-05 19:47:47 +0000 | [diff] [blame] | 5574 | Diag(Var->getLocation(), |
| 5575 | diag::err_typecheck_incomplete_array_needs_initializer); |
| 5576 | Var->setInvalidDecl(); |
| 5577 | return; |
| 5578 | } |
| 5579 | |
John McCall | b567a8b | 2010-08-01 01:25:24 +0000 | [diff] [blame] | 5580 | // Provide a specific diagnostic for uninitialized variable |
| 5581 | // definitions with reference type. |
| 5582 | if (Type->isReferenceType()) { |
| 5583 | Diag(Var->getLocation(), diag::err_reference_var_requires_init) |
| 5584 | << Var->getDeclName() |
| 5585 | << SourceRange(Var->getLocation(), Var->getLocation()); |
| 5586 | Var->setInvalidDecl(); |
| 5587 | return; |
| 5588 | } |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 5589 | |
| 5590 | // Do not attempt to type-check the default initializer for a |
| 5591 | // variable with dependent type. |
| 5592 | if (Type->isDependentType()) |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 5593 | return; |
Douglas Gregor | 39da0b8 | 2009-09-09 23:08:42 +0000 | [diff] [blame] | 5594 | |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 5595 | if (Var->isInvalidDecl()) |
| 5596 | return; |
Douglas Gregor | 1ab537b | 2009-12-03 18:33:45 +0000 | [diff] [blame] | 5597 | |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 5598 | if (RequireCompleteType(Var->getLocation(), |
| 5599 | Context.getBaseElementType(Type), |
| 5600 | diag::err_typecheck_decl_incomplete_type)) { |
| 5601 | Var->setInvalidDecl(); |
| 5602 | return; |
Douglas Gregor | 18fe568 | 2008-11-03 20:45:27 +0000 | [diff] [blame] | 5603 | } |
Douglas Gregor | 27c8dc0 | 2008-10-29 00:13:59 +0000 | [diff] [blame] | 5604 | |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 5605 | // The variable can not have an abstract class type. |
| 5606 | if (RequireNonAbstractType(Var->getLocation(), Type, |
| 5607 | diag::err_abstract_type_in_decl, |
| 5608 | AbstractVariableType)) { |
| 5609 | Var->setInvalidDecl(); |
| 5610 | return; |
| 5611 | } |
| 5612 | |
Douglas Gregor | 516a6bc | 2010-03-08 02:45:10 +0000 | [diff] [blame] | 5613 | const RecordType *Record |
| 5614 | = Context.getBaseElementType(Type)->getAs<RecordType>(); |
Chandler Carruth | cfe38c4 | 2011-04-22 19:01:39 +0000 | [diff] [blame] | 5615 | if (Record && getLangOptions().CPlusPlus && |
Douglas Gregor | 516a6bc | 2010-03-08 02:45:10 +0000 | [diff] [blame] | 5616 | cast<CXXRecordDecl>(Record->getDecl())->isPOD()) { |
| 5617 | // C++03 [dcl.init]p9: |
| 5618 | // If no initializer is specified for an object, and the |
| 5619 | // object is of (possibly cv-qualified) non-POD class type (or |
| 5620 | // array thereof), the object shall be default-initialized; if |
| 5621 | // the object is of const-qualified type, the underlying class |
| 5622 | // type shall have a user-declared default |
| 5623 | // constructor. Otherwise, if no initializer is specified for |
| 5624 | // a non- static object, the object and its subobjects, if |
| 5625 | // any, have an indeterminate initial value); if the object |
| 5626 | // or any of its subobjects are of const-qualified type, the |
| 5627 | // program is ill-formed. |
Douglas Gregor | 516a6bc | 2010-03-08 02:45:10 +0000 | [diff] [blame] | 5628 | } else { |
John McCall | e46f62c | 2010-08-01 01:24:59 +0000 | [diff] [blame] | 5629 | // Check for jumps past the implicit initializer. C++0x |
| 5630 | // clarifies that this applies to a "variable with automatic |
| 5631 | // storage duration", not a "local variable". |
| 5632 | if (getLangOptions().CPlusPlus && Var->hasLocalStorage()) |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 5633 | getCurFunction()->setHasBranchProtectedScope(); |
John McCall | e46f62c | 2010-08-01 01:24:59 +0000 | [diff] [blame] | 5634 | |
Douglas Gregor | 516a6bc | 2010-03-08 02:45:10 +0000 | [diff] [blame] | 5635 | InitializedEntity Entity = InitializedEntity::InitializeVariable(Var); |
| 5636 | InitializationKind Kind |
| 5637 | = InitializationKind::CreateDefault(Var->getLocation()); |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 5638 | |
Douglas Gregor | 516a6bc | 2010-03-08 02:45:10 +0000 | [diff] [blame] | 5639 | InitializationSequence InitSeq(*this, Entity, Kind, 0, 0); |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 5640 | ExprResult Init = InitSeq.Perform(*this, Entity, Kind, |
| 5641 | MultiExprArg(*this, 0, 0)); |
Douglas Gregor | 516a6bc | 2010-03-08 02:45:10 +0000 | [diff] [blame] | 5642 | if (Init.isInvalid()) |
| 5643 | Var->setInvalidDecl(); |
John McCall | 2998d6b | 2011-01-19 11:48:09 +0000 | [diff] [blame] | 5644 | else if (Init.get()) |
Douglas Gregor | 53c374f | 2010-12-07 00:41:46 +0000 | [diff] [blame] | 5645 | Var->setInit(MaybeCreateExprWithCleanups(Init.get())); |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 5646 | } |
Douglas Gregor | 516a6bc | 2010-03-08 02:45:10 +0000 | [diff] [blame] | 5647 | |
John McCall | 2998d6b | 2011-01-19 11:48:09 +0000 | [diff] [blame] | 5648 | CheckCompleteVariableDeclaration(Var); |
Douglas Gregor | 27c8dc0 | 2008-10-29 00:13:59 +0000 | [diff] [blame] | 5649 | } |
| 5650 | } |
| 5651 | |
Richard Smith | ad762fc | 2011-04-14 22:09:26 +0000 | [diff] [blame] | 5652 | void Sema::ActOnCXXForRangeDecl(Decl *D) { |
| 5653 | VarDecl *VD = dyn_cast<VarDecl>(D); |
| 5654 | if (!VD) { |
| 5655 | Diag(D->getLocation(), diag::err_for_range_decl_must_be_var); |
| 5656 | D->setInvalidDecl(); |
| 5657 | return; |
| 5658 | } |
| 5659 | |
| 5660 | VD->setCXXForRangeDecl(true); |
| 5661 | |
| 5662 | // for-range-declaration cannot be given a storage class specifier. |
| 5663 | int Error = -1; |
| 5664 | switch (VD->getStorageClassAsWritten()) { |
| 5665 | case SC_None: |
| 5666 | break; |
| 5667 | case SC_Extern: |
| 5668 | Error = 0; |
| 5669 | break; |
| 5670 | case SC_Static: |
| 5671 | Error = 1; |
| 5672 | break; |
| 5673 | case SC_PrivateExtern: |
| 5674 | Error = 2; |
| 5675 | break; |
| 5676 | case SC_Auto: |
| 5677 | Error = 3; |
| 5678 | break; |
| 5679 | case SC_Register: |
| 5680 | Error = 4; |
| 5681 | break; |
| 5682 | } |
| 5683 | // FIXME: constexpr isn't allowed here. |
| 5684 | //if (DS.isConstexprSpecified()) |
| 5685 | // Error = 5; |
| 5686 | if (Error != -1) { |
| 5687 | Diag(VD->getOuterLocStart(), diag::err_for_range_storage_class) |
| 5688 | << VD->getDeclName() << Error; |
| 5689 | D->setInvalidDecl(); |
| 5690 | } |
| 5691 | } |
| 5692 | |
John McCall | 2998d6b | 2011-01-19 11:48:09 +0000 | [diff] [blame] | 5693 | void Sema::CheckCompleteVariableDeclaration(VarDecl *var) { |
| 5694 | if (var->isInvalidDecl()) return; |
| 5695 | |
| 5696 | // All the following checks are C++ only. |
| 5697 | if (!getLangOptions().CPlusPlus) return; |
| 5698 | |
| 5699 | QualType baseType = Context.getBaseElementType(var->getType()); |
| 5700 | if (baseType->isDependentType()) return; |
| 5701 | |
| 5702 | // __block variables might require us to capture a copy-initializer. |
| 5703 | if (var->hasAttr<BlocksAttr>()) { |
| 5704 | // It's currently invalid to ever have a __block variable with an |
| 5705 | // array type; should we diagnose that here? |
| 5706 | |
| 5707 | // Regardless, we don't want to ignore array nesting when |
| 5708 | // constructing this copy. |
| 5709 | QualType type = var->getType(); |
| 5710 | |
| 5711 | if (type->isStructureOrClassType()) { |
| 5712 | SourceLocation poi = var->getLocation(); |
| 5713 | Expr *varRef = new (Context) DeclRefExpr(var, type, VK_LValue, poi); |
| 5714 | ExprResult result = |
| 5715 | PerformCopyInitialization( |
| 5716 | InitializedEntity::InitializeBlock(poi, type, false), |
| 5717 | poi, Owned(varRef)); |
| 5718 | if (!result.isInvalid()) { |
| 5719 | result = MaybeCreateExprWithCleanups(result); |
| 5720 | Expr *init = result.takeAs<Expr>(); |
| 5721 | Context.setBlockVarCopyInits(var, init); |
| 5722 | } |
| 5723 | } |
| 5724 | } |
| 5725 | |
| 5726 | // Check for global constructors. |
| 5727 | if (!var->getDeclContext()->isDependentContext() && |
| 5728 | var->hasGlobalStorage() && |
| 5729 | !var->isStaticLocal() && |
| 5730 | var->getInit() && |
| 5731 | !var->getInit()->isConstantInitializer(Context, |
| 5732 | baseType->isReferenceType())) |
| 5733 | Diag(var->getLocation(), diag::warn_global_constructor) |
| 5734 | << var->getInit()->getSourceRange(); |
| 5735 | |
| 5736 | // Require the destructor. |
| 5737 | if (const RecordType *recordType = baseType->getAs<RecordType>()) |
| 5738 | FinalizeVarWithDestructor(var, recordType); |
| 5739 | } |
| 5740 | |
Richard Smith | 483b9f3 | 2011-02-21 20:05:19 +0000 | [diff] [blame] | 5741 | /// FinalizeDeclaration - called by ParseDeclarationAfterDeclarator to perform |
| 5742 | /// any semantic actions necessary after any initializer has been attached. |
| 5743 | void |
| 5744 | Sema::FinalizeDeclaration(Decl *ThisDecl) { |
| 5745 | // Note that we are no longer parsing the initializer for this declaration. |
| 5746 | ParsingInitForAutoVars.erase(ThisDecl); |
| 5747 | } |
| 5748 | |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 5749 | Sema::DeclGroupPtrTy |
| 5750 | Sema::FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, |
| 5751 | Decl **Group, unsigned NumDecls) { |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 5752 | llvm::SmallVector<Decl*, 8> Decls; |
Eli Friedman | c1dc653 | 2009-05-29 01:49:24 +0000 | [diff] [blame] | 5753 | |
| 5754 | if (DS.isTypeSpecOwned()) |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 5755 | Decls.push_back(DS.getRepAsDecl()); |
Eli Friedman | c1dc653 | 2009-05-29 01:49:24 +0000 | [diff] [blame] | 5756 | |
Richard Smith | 406c38e | 2011-02-23 00:37:57 +0000 | [diff] [blame] | 5757 | for (unsigned i = 0; i != NumDecls; ++i) |
| 5758 | if (Decl *D = Group[i]) |
| 5759 | Decls.push_back(D); |
| 5760 | |
Chandler Carruth | a7689ef | 2011-03-27 09:46:56 +0000 | [diff] [blame] | 5761 | return BuildDeclaratorGroup(Decls.data(), Decls.size(), |
Richard Smith | 406c38e | 2011-02-23 00:37:57 +0000 | [diff] [blame] | 5762 | DS.getTypeSpecType() == DeclSpec::TST_auto); |
| 5763 | } |
| 5764 | |
| 5765 | /// BuildDeclaratorGroup - convert a list of declarations into a declaration |
| 5766 | /// group, performing any necessary semantic checking. |
| 5767 | Sema::DeclGroupPtrTy |
| 5768 | Sema::BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, |
| 5769 | bool TypeMayContainAuto) { |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 5770 | // C++0x [dcl.spec.auto]p7: |
| 5771 | // If the type deduced for the template parameter U is not the same in each |
| 5772 | // deduction, the program is ill-formed. |
| 5773 | // FIXME: When initializer-list support is added, a distinction is needed |
| 5774 | // between the deduced type U and the deduced type which 'auto' stands for. |
| 5775 | // auto a = 0, b = { 1, 2, 3 }; |
| 5776 | // is legal because the deduced type U is 'int' in both cases. |
Richard Smith | 406c38e | 2011-02-23 00:37:57 +0000 | [diff] [blame] | 5777 | if (TypeMayContainAuto && NumDecls > 1) { |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 5778 | QualType Deduced; |
| 5779 | CanQualType DeducedCanon; |
| 5780 | VarDecl *DeducedDecl = 0; |
| 5781 | for (unsigned i = 0; i != NumDecls; ++i) { |
| 5782 | if (VarDecl *D = dyn_cast<VarDecl>(Group[i])) { |
| 5783 | AutoType *AT = D->getType()->getContainedAutoType(); |
Richard Smith | 406c38e | 2011-02-23 00:37:57 +0000 | [diff] [blame] | 5784 | // Don't reissue diagnostics when instantiating a template. |
| 5785 | if (AT && D->isInvalidDecl()) |
| 5786 | break; |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 5787 | if (AT && AT->isDeduced()) { |
| 5788 | QualType U = AT->getDeducedType(); |
| 5789 | CanQualType UCanon = Context.getCanonicalType(U); |
| 5790 | if (Deduced.isNull()) { |
| 5791 | Deduced = U; |
| 5792 | DeducedCanon = UCanon; |
| 5793 | DeducedDecl = D; |
| 5794 | } else if (DeducedCanon != UCanon) { |
Richard Smith | 406c38e | 2011-02-23 00:37:57 +0000 | [diff] [blame] | 5795 | Diag(D->getTypeSourceInfo()->getTypeLoc().getBeginLoc(), |
| 5796 | diag::err_auto_different_deductions) |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 5797 | << Deduced << DeducedDecl->getDeclName() |
| 5798 | << U << D->getDeclName() |
| 5799 | << DeducedDecl->getInit()->getSourceRange() |
| 5800 | << D->getInit()->getSourceRange(); |
Richard Smith | 406c38e | 2011-02-23 00:37:57 +0000 | [diff] [blame] | 5801 | D->setInvalidDecl(); |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 5802 | break; |
| 5803 | } |
| 5804 | } |
| 5805 | } |
| 5806 | } |
| 5807 | } |
| 5808 | |
Richard Smith | 406c38e | 2011-02-23 00:37:57 +0000 | [diff] [blame] | 5809 | return DeclGroupPtrTy::make(DeclGroupRef::Create(Context, Group, NumDecls)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5810 | } |
Steve Naroff | e1223f7 | 2007-08-28 03:03:08 +0000 | [diff] [blame] | 5811 | |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 5812 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 5813 | /// ActOnParamDeclarator - Called from Parser::ParseFunctionDeclarator() |
| 5814 | /// to introduce parameters into function prototype scope. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 5815 | Decl *Sema::ActOnParamDeclarator(Scope *S, Declarator &D) { |
Chris Lattner | 985abd9 | 2008-06-26 06:49:43 +0000 | [diff] [blame] | 5816 | const DeclSpec &DS = D.getDeclSpec(); |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 5817 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 5818 | // Verify C99 6.7.5.3p2: The only SCS allowed is 'register'. |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 5819 | VarDecl::StorageClass StorageClass = SC_None; |
| 5820 | VarDecl::StorageClass StorageClassAsWritten = SC_None; |
Daniel Dunbar | 33ad012 | 2008-09-03 21:54:21 +0000 | [diff] [blame] | 5821 | if (DS.getStorageClassSpec() == DeclSpec::SCS_register) { |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 5822 | StorageClass = SC_Register; |
| 5823 | StorageClassAsWritten = SC_Register; |
Daniel Dunbar | 33ad012 | 2008-09-03 21:54:21 +0000 | [diff] [blame] | 5824 | } else if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified) { |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 5825 | Diag(DS.getStorageClassSpecLoc(), |
| 5826 | diag::err_invalid_storage_class_in_func_decl); |
Chris Lattner | 985abd9 | 2008-06-26 06:49:43 +0000 | [diff] [blame] | 5827 | D.getMutableDeclSpec().ClearStorageClassSpecs(); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 5828 | } |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 5829 | |
| 5830 | if (D.getDeclSpec().isThreadSpecified()) |
| 5831 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_invalid_thread); |
| 5832 | |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 5833 | DiagnoseFunctionSpecifiers(D); |
| 5834 | |
Douglas Gregor | 402abb5 | 2009-05-28 23:31:59 +0000 | [diff] [blame] | 5835 | TagDecl *OwnedDecl = 0; |
John McCall | bf1a028 | 2010-06-04 23:28:52 +0000 | [diff] [blame] | 5836 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S, &OwnedDecl); |
| 5837 | QualType parmDeclType = TInfo->getType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5838 | |
Douglas Gregor | a8bc8c9 | 2010-12-23 22:44:42 +0000 | [diff] [blame] | 5839 | if (getLangOptions().CPlusPlus) { |
| 5840 | // Check that there are no default arguments inside the type of this |
| 5841 | // parameter. |
| 5842 | CheckExtraCXXDefaultArguments(D); |
| 5843 | |
| 5844 | if (OwnedDecl && OwnedDecl->isDefinition()) { |
| 5845 | // C++ [dcl.fct]p6: |
| 5846 | // Types shall not be defined in return or parameter types. |
| 5847 | Diag(OwnedDecl->getLocation(), diag::err_type_defined_in_param_type) |
| 5848 | << Context.getTypeDeclType(OwnedDecl); |
| 5849 | } |
| 5850 | |
| 5851 | // Parameter declarators cannot be qualified (C++ [dcl.meaning]p1). |
| 5852 | if (D.getCXXScopeSpec().isSet()) { |
| 5853 | Diag(D.getIdentifierLoc(), diag::err_qualified_param_declarator) |
| 5854 | << D.getCXXScopeSpec().getRange(); |
| 5855 | D.getCXXScopeSpec().clear(); |
| 5856 | } |
Douglas Gregor | 402abb5 | 2009-05-28 23:31:59 +0000 | [diff] [blame] | 5857 | } |
| 5858 | |
Sean Hunt | 7533a5b | 2010-11-03 01:07:06 +0000 | [diff] [blame] | 5859 | // Ensure we have a valid name |
| 5860 | IdentifierInfo *II = 0; |
| 5861 | if (D.hasName()) { |
| 5862 | II = D.getIdentifier(); |
| 5863 | if (!II) { |
| 5864 | Diag(D.getIdentifierLoc(), diag::err_bad_parameter_name) |
| 5865 | << GetNameForDeclarator(D).getName().getAsString(); |
| 5866 | D.setInvalidType(true); |
| 5867 | } |
| 5868 | } |
| 5869 | |
Chris Lattner | d84aac1 | 2010-02-22 00:40:25 +0000 | [diff] [blame] | 5870 | // Check for redeclaration of parameters, e.g. int foo(int x, int x); |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 5871 | if (II) { |
John McCall | 10f2873 | 2010-03-18 06:42:38 +0000 | [diff] [blame] | 5872 | LookupResult R(*this, II, D.getIdentifierLoc(), LookupOrdinaryName, |
| 5873 | ForRedeclaration); |
| 5874 | LookupName(R, S); |
| 5875 | if (R.isSingleResult()) { |
| 5876 | NamedDecl *PrevDecl = R.getFoundDecl(); |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 5877 | if (PrevDecl->isTemplateParameter()) { |
| 5878 | // Maybe we will complain about the shadowed template parameter. |
| 5879 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl); |
| 5880 | // Just pretend that we didn't see the previous declaration. |
| 5881 | PrevDecl = 0; |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 5882 | } else if (S->isDeclScope(PrevDecl)) { |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 5883 | Diag(D.getIdentifierLoc(), diag::err_param_redefinition) << II; |
Chris Lattner | d84aac1 | 2010-02-22 00:40:25 +0000 | [diff] [blame] | 5884 | Diag(PrevDecl->getLocation(), diag::note_previous_declaration); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 5885 | |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 5886 | // Recover by removing the name |
| 5887 | II = 0; |
| 5888 | D.SetIdentifier(0, D.getIdentifierLoc()); |
Fariborz Jahanian | 9a66c30 | 2010-02-12 21:53:14 +0000 | [diff] [blame] | 5889 | D.setInvalidType(true); |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 5890 | } |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 5891 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5892 | } |
Steve Naroff | 6a9f3e3 | 2007-08-07 22:44:21 +0000 | [diff] [blame] | 5893 | |
John McCall | 7a9813c | 2010-01-22 00:28:27 +0000 | [diff] [blame] | 5894 | // Temporarily put parameter variables in the translation unit, not |
| 5895 | // the enclosing context. This prevents them from accidentally |
| 5896 | // looking like class members in C++. |
Douglas Gregor | cb27b0f | 2010-04-12 07:48:19 +0000 | [diff] [blame] | 5897 | ParmVarDecl *New = CheckParameter(Context.getTranslationUnitDecl(), |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 5898 | D.getSourceRange().getBegin(), |
| 5899 | D.getIdentifierLoc(), II, |
| 5900 | parmDeclType, TInfo, |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 5901 | StorageClass, StorageClassAsWritten); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5902 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 5903 | if (D.isInvalidType()) |
John McCall | fb44de9 | 2011-05-01 22:35:37 +0000 | [diff] [blame] | 5904 | New->setInvalidDecl(); |
| 5905 | |
| 5906 | assert(S->isFunctionPrototypeScope()); |
| 5907 | assert(S->getFunctionPrototypeDepth() >= 1); |
| 5908 | New->setScopeInfo(S->getFunctionPrototypeDepth() - 1, |
| 5909 | S->getNextFunctionPrototypeIndex()); |
Douglas Gregor | cb27b0f | 2010-04-12 07:48:19 +0000 | [diff] [blame] | 5910 | |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 5911 | // Add the parameter declaration into this scope. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 5912 | S->AddDecl(New); |
Argyrios Kyrtzidis | 87f3ff0 | 2008-04-12 00:47:19 +0000 | [diff] [blame] | 5913 | if (II) |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 5914 | IdResolver.AddDecl(New); |
Nate Begeman | b7894b5 | 2008-02-17 21:20:31 +0000 | [diff] [blame] | 5915 | |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 5916 | ProcessDeclAttributes(S, New, D); |
Mike Stump | ea000bf | 2009-04-30 00:19:40 +0000 | [diff] [blame] | 5917 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 5918 | if (New->hasAttr<BlocksAttr>()) { |
Mike Stump | ea000bf | 2009-04-30 00:19:40 +0000 | [diff] [blame] | 5919 | Diag(New->getLocation(), diag::err_block_on_nonlocal); |
| 5920 | } |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 5921 | return New; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5922 | } |
Fariborz Jahanian | 306d68f | 2007-11-08 23:49:49 +0000 | [diff] [blame] | 5923 | |
John McCall | 82dc009 | 2010-06-04 11:21:44 +0000 | [diff] [blame] | 5924 | /// \brief Synthesizes a variable for a parameter arising from a |
| 5925 | /// typedef. |
| 5926 | ParmVarDecl *Sema::BuildParmVarDeclForTypedef(DeclContext *DC, |
| 5927 | SourceLocation Loc, |
| 5928 | QualType T) { |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 5929 | /* FIXME: setting StartLoc == Loc. |
| 5930 | Would it be worth to modify callers so as to provide proper source |
| 5931 | location for the unnamed parameters, embedding the parameter's type? */ |
| 5932 | ParmVarDecl *Param = ParmVarDecl::Create(Context, DC, Loc, Loc, 0, |
John McCall | 82dc009 | 2010-06-04 11:21:44 +0000 | [diff] [blame] | 5933 | T, Context.getTrivialTypeSourceInfo(T, Loc), |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 5934 | SC_None, SC_None, 0); |
John McCall | 82dc009 | 2010-06-04 11:21:44 +0000 | [diff] [blame] | 5935 | Param->setImplicit(); |
| 5936 | return Param; |
| 5937 | } |
| 5938 | |
John McCall | fbce0e1 | 2010-08-24 09:05:15 +0000 | [diff] [blame] | 5939 | void Sema::DiagnoseUnusedParameters(ParmVarDecl * const *Param, |
| 5940 | ParmVarDecl * const *ParamEnd) { |
John McCall | fbce0e1 | 2010-08-24 09:05:15 +0000 | [diff] [blame] | 5941 | // Don't diagnose unused-parameter errors in template instantiations; we |
| 5942 | // will already have done so in the template itself. |
| 5943 | if (!ActiveTemplateInstantiations.empty()) |
| 5944 | return; |
| 5945 | |
| 5946 | for (; Param != ParamEnd; ++Param) { |
| 5947 | if (!(*Param)->isUsed() && (*Param)->getDeclName() && |
| 5948 | !(*Param)->hasAttr<UnusedAttr>()) { |
| 5949 | Diag((*Param)->getLocation(), diag::warn_unused_parameter) |
| 5950 | << (*Param)->getDeclName(); |
| 5951 | } |
| 5952 | } |
| 5953 | } |
| 5954 | |
Argyrios Kyrtzidis | 3532fdd | 2010-11-17 23:11:54 +0000 | [diff] [blame] | 5955 | void Sema::DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Param, |
| 5956 | ParmVarDecl * const *ParamEnd, |
| 5957 | QualType ReturnTy, |
| 5958 | NamedDecl *D) { |
Argyrios Kyrtzidis | 1380a14 | 2010-11-18 00:20:36 +0000 | [diff] [blame] | 5959 | if (LangOpts.NumLargeByValueCopy == 0) // No check. |
Argyrios Kyrtzidis | 3532fdd | 2010-11-17 23:11:54 +0000 | [diff] [blame] | 5960 | return; |
| 5961 | |
Argyrios Kyrtzidis | 1380a14 | 2010-11-18 00:20:36 +0000 | [diff] [blame] | 5962 | // Warn if the return value is pass-by-value and larger than the specified |
| 5963 | // threshold. |
Argyrios Kyrtzidis | f4bed3f | 2010-11-18 18:51:03 +0000 | [diff] [blame] | 5964 | if (ReturnTy->isPODType()) { |
Argyrios Kyrtzidis | 3532fdd | 2010-11-17 23:11:54 +0000 | [diff] [blame] | 5965 | unsigned Size = Context.getTypeSizeInChars(ReturnTy).getQuantity(); |
Argyrios Kyrtzidis | 1380a14 | 2010-11-18 00:20:36 +0000 | [diff] [blame] | 5966 | if (Size > LangOpts.NumLargeByValueCopy) |
Argyrios Kyrtzidis | 3532fdd | 2010-11-17 23:11:54 +0000 | [diff] [blame] | 5967 | Diag(D->getLocation(), diag::warn_return_value_size) |
| 5968 | << D->getDeclName() << Size; |
| 5969 | } |
| 5970 | |
Argyrios Kyrtzidis | 1380a14 | 2010-11-18 00:20:36 +0000 | [diff] [blame] | 5971 | // Warn if any parameter is pass-by-value and larger than the specified |
| 5972 | // threshold. |
Argyrios Kyrtzidis | 3532fdd | 2010-11-17 23:11:54 +0000 | [diff] [blame] | 5973 | for (; Param != ParamEnd; ++Param) { |
| 5974 | QualType T = (*Param)->getType(); |
| 5975 | if (!T->isPODType()) |
| 5976 | continue; |
| 5977 | unsigned Size = Context.getTypeSizeInChars(T).getQuantity(); |
Argyrios Kyrtzidis | 1380a14 | 2010-11-18 00:20:36 +0000 | [diff] [blame] | 5978 | if (Size > LangOpts.NumLargeByValueCopy) |
Argyrios Kyrtzidis | 3532fdd | 2010-11-17 23:11:54 +0000 | [diff] [blame] | 5979 | Diag((*Param)->getLocation(), diag::warn_parameter_size) |
| 5980 | << (*Param)->getDeclName() << Size; |
| 5981 | } |
| 5982 | } |
| 5983 | |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 5984 | ParmVarDecl *Sema::CheckParameter(DeclContext *DC, SourceLocation StartLoc, |
| 5985 | SourceLocation NameLoc, IdentifierInfo *Name, |
| 5986 | QualType T, TypeSourceInfo *TSInfo, |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 5987 | VarDecl::StorageClass StorageClass, |
| 5988 | VarDecl::StorageClass StorageClassAsWritten) { |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 5989 | ParmVarDecl *New = ParmVarDecl::Create(Context, DC, StartLoc, NameLoc, Name, |
| 5990 | adjustParameterType(T), TSInfo, |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 5991 | StorageClass, StorageClassAsWritten, |
| 5992 | 0); |
Douglas Gregor | cb27b0f | 2010-04-12 07:48:19 +0000 | [diff] [blame] | 5993 | |
| 5994 | // Parameters can not be abstract class types. |
| 5995 | // For record types, this is done by the AbstractClassUsageDiagnoser once |
| 5996 | // the class has been completely parsed. |
| 5997 | if (!CurContext->isRecord() && |
| 5998 | RequireNonAbstractType(NameLoc, T, diag::err_abstract_type_in_decl, |
| 5999 | AbstractParamType)) |
| 6000 | New->setInvalidDecl(); |
| 6001 | |
| 6002 | // Parameter declarators cannot be interface types. All ObjC objects are |
| 6003 | // passed by reference. |
John McCall | c12c5bb | 2010-05-15 11:32:37 +0000 | [diff] [blame] | 6004 | if (T->isObjCObjectType()) { |
Douglas Gregor | cb27b0f | 2010-04-12 07:48:19 +0000 | [diff] [blame] | 6005 | Diag(NameLoc, |
| 6006 | diag::err_object_cannot_be_passed_returned_by_value) << 1 << T; |
| 6007 | New->setInvalidDecl(); |
| 6008 | } |
| 6009 | |
| 6010 | // ISO/IEC TR 18037 S6.7.3: "The type of an object with automatic storage |
| 6011 | // duration shall not be qualified by an address-space qualifier." |
| 6012 | // Since all parameters have automatic store duration, they can not have |
| 6013 | // an address space. |
| 6014 | if (T.getAddressSpace() != 0) { |
| 6015 | Diag(NameLoc, diag::err_arg_with_address_space); |
| 6016 | New->setInvalidDecl(); |
| 6017 | } |
| 6018 | |
| 6019 | return New; |
| 6020 | } |
| 6021 | |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 6022 | void Sema::ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, |
| 6023 | SourceLocation LocAfterDecls) { |
Abramo Bagnara | 075f8f1 | 2010-12-10 16:29:40 +0000 | [diff] [blame] | 6024 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo(); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 6025 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6026 | // Verify 6.9.1p6: 'every identifier in the identifier list shall be declared' |
| 6027 | // for a K&R function. |
| 6028 | if (!FTI.hasPrototype) { |
Douglas Gregor | 2610348 | 2009-04-02 03:14:12 +0000 | [diff] [blame] | 6029 | for (int i = FTI.NumArgs; i != 0; /* decrement in loop */) { |
| 6030 | --i; |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 6031 | if (FTI.ArgInfo[i].Param == 0) { |
Daniel Dunbar | 5ffe14c | 2009-10-18 20:26:27 +0000 | [diff] [blame] | 6032 | llvm::SmallString<256> Code; |
| 6033 | llvm::raw_svector_ostream(Code) << " int " |
Daniel Dunbar | 01eb9b9 | 2009-10-18 21:17:35 +0000 | [diff] [blame] | 6034 | << FTI.ArgInfo[i].Ident->getName() |
Daniel Dunbar | 5ffe14c | 2009-10-18 20:26:27 +0000 | [diff] [blame] | 6035 | << ";\n"; |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 6036 | Diag(FTI.ArgInfo[i].IdentLoc, diag::ext_param_not_declared) |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 6037 | << FTI.ArgInfo[i].Ident |
Douglas Gregor | 849b243 | 2010-03-31 17:46:05 +0000 | [diff] [blame] | 6038 | << FixItHint::CreateInsertion(LocAfterDecls, Code.str()); |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 6039 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6040 | // Implicitly declare the argument as type 'int' for lack of a better |
| 6041 | // type. |
John McCall | 0b7e678 | 2011-03-24 11:26:52 +0000 | [diff] [blame] | 6042 | AttributeFactory attrs; |
| 6043 | DeclSpec DS(attrs); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 6044 | const char* PrevSpec; // unused |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 6045 | unsigned DiagID; // unused |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6046 | DS.SetTypeSpecType(DeclSpec::TST_int, FTI.ArgInfo[i].IdentLoc, |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 6047 | PrevSpec, DiagID); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 6048 | Declarator ParamD(DS, Declarator::KNRTypeListContext); |
| 6049 | ParamD.SetIdentifier(FTI.ArgInfo[i].Ident, FTI.ArgInfo[i].IdentLoc); |
Douglas Gregor | be109b3 | 2009-01-23 16:23:13 +0000 | [diff] [blame] | 6050 | FTI.ArgInfo[i].Param = ActOnParamDeclarator(S, ParamD); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6051 | } |
| 6052 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6053 | } |
Douglas Gregor | be109b3 | 2009-01-23 16:23:13 +0000 | [diff] [blame] | 6054 | } |
| 6055 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6056 | Decl *Sema::ActOnStartOfFunctionDef(Scope *FnBodyScope, |
| 6057 | Declarator &D) { |
Douglas Gregor | be109b3 | 2009-01-23 16:23:13 +0000 | [diff] [blame] | 6058 | assert(getCurFunctionDecl() == 0 && "Function parsing confused"); |
Abramo Bagnara | 075f8f1 | 2010-12-10 16:29:40 +0000 | [diff] [blame] | 6059 | assert(D.isFunctionDeclarator() && "Not a function declarator!"); |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 6060 | Scope *ParentScope = FnBodyScope->getParent(); |
Steve Naroff | adbbd0c | 2008-01-14 20:51:29 +0000 | [diff] [blame] | 6061 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6062 | Decl *DP = HandleDeclarator(ParentScope, D, |
| 6063 | MultiTemplateParamsArg(*this), |
| 6064 | /*IsFunctionDefinition=*/true); |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 6065 | return ActOnStartOfFunctionDef(FnBodyScope, DP); |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 6066 | } |
| 6067 | |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 6068 | static bool ShouldWarnAboutMissingPrototype(const FunctionDecl *FD) { |
| 6069 | // Don't warn about invalid declarations. |
| 6070 | if (FD->isInvalidDecl()) |
| 6071 | return false; |
Anders Carlsson | 63fb673 | 2009-12-09 03:44:46 +0000 | [diff] [blame] | 6072 | |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 6073 | // Or declarations that aren't global. |
| 6074 | if (!FD->isGlobal()) |
| 6075 | return false; |
Anders Carlsson | 63fb673 | 2009-12-09 03:44:46 +0000 | [diff] [blame] | 6076 | |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 6077 | // Don't warn about C++ member functions. |
| 6078 | if (isa<CXXMethodDecl>(FD)) |
| 6079 | return false; |
Anders Carlsson | 63fb673 | 2009-12-09 03:44:46 +0000 | [diff] [blame] | 6080 | |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 6081 | // Don't warn about 'main'. |
| 6082 | if (FD->isMain()) |
| 6083 | return false; |
Anders Carlsson | 63fb673 | 2009-12-09 03:44:46 +0000 | [diff] [blame] | 6084 | |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 6085 | // Don't warn about inline functions. |
John McCall | 850d3b3 | 2011-03-22 07:16:37 +0000 | [diff] [blame] | 6086 | if (FD->isInlined()) |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 6087 | return false; |
Anders Carlsson | 63fb673 | 2009-12-09 03:44:46 +0000 | [diff] [blame] | 6088 | |
| 6089 | // Don't warn about function templates. |
| 6090 | if (FD->getDescribedFunctionTemplate()) |
| 6091 | return false; |
| 6092 | |
| 6093 | // Don't warn about function template specializations. |
| 6094 | if (FD->isFunctionTemplateSpecialization()) |
| 6095 | return false; |
| 6096 | |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 6097 | bool MissingPrototype = true; |
| 6098 | for (const FunctionDecl *Prev = FD->getPreviousDeclaration(); |
| 6099 | Prev; Prev = Prev->getPreviousDeclaration()) { |
| 6100 | // Ignore any declarations that occur in function or method |
| 6101 | // scope, because they aren't visible from the header. |
| 6102 | if (Prev->getDeclContext()->isFunctionOrMethod()) |
| 6103 | continue; |
| 6104 | |
| 6105 | MissingPrototype = !Prev->getType()->isFunctionProtoType(); |
| 6106 | break; |
| 6107 | } |
| 6108 | |
| 6109 | return MissingPrototype; |
| 6110 | } |
| 6111 | |
Francois Pichet | d4a0caf | 2011-04-22 23:20:44 +0000 | [diff] [blame] | 6112 | void Sema::CheckForFunctionRedefinition(FunctionDecl *FD) { |
| 6113 | // Don't complain if we're in GNU89 mode and the previous definition |
| 6114 | // was an extern inline function. |
| 6115 | const FunctionDecl *Definition; |
Sean Hunt | 10620eb | 2011-05-06 20:44:56 +0000 | [diff] [blame^] | 6116 | if (FD->isDefined(Definition) && |
Francois Pichet | d4a0caf | 2011-04-22 23:20:44 +0000 | [diff] [blame] | 6117 | !canRedefineFunction(Definition, getLangOptions())) { |
| 6118 | if (getLangOptions().GNUMode && Definition->isInlineSpecified() && |
| 6119 | Definition->getStorageClass() == SC_Extern) |
| 6120 | Diag(FD->getLocation(), diag::err_redefinition_extern_inline) |
| 6121 | << FD->getDeclName() << getLangOptions().CPlusPlus; |
| 6122 | else |
| 6123 | Diag(FD->getLocation(), diag::err_redefinition) << FD->getDeclName(); |
| 6124 | Diag(Definition->getLocation(), diag::note_previous_definition); |
| 6125 | } |
| 6126 | } |
| 6127 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6128 | Decl *Sema::ActOnStartOfFunctionDef(Scope *FnBodyScope, Decl *D) { |
Anders Carlsson | 0ebb6d3 | 2009-10-29 15:46:07 +0000 | [diff] [blame] | 6129 | // Clear the last template instantiation error context. |
| 6130 | LastTemplateInstantiationErrorContext = ActiveTemplateInstantiation(); |
| 6131 | |
Douglas Gregor | 52591bf | 2009-06-24 00:54:41 +0000 | [diff] [blame] | 6132 | if (!D) |
| 6133 | return D; |
Douglas Gregor | d83d040 | 2009-08-22 00:34:47 +0000 | [diff] [blame] | 6134 | FunctionDecl *FD = 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6135 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6136 | if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(D)) |
Douglas Gregor | d83d040 | 2009-08-22 00:34:47 +0000 | [diff] [blame] | 6137 | FD = FunTmpl->getTemplatedDecl(); |
| 6138 | else |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6139 | FD = cast<FunctionDecl>(D); |
Douglas Gregor | 6fc17ff | 2008-10-29 15:10:40 +0000 | [diff] [blame] | 6140 | |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 6141 | // Enter a new function scope |
| 6142 | PushFunctionScope(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6143 | |
Douglas Gregor | 6fc17ff | 2008-10-29 15:10:40 +0000 | [diff] [blame] | 6144 | // See if this is a redefinition. |
Francois Pichet | d4a0caf | 2011-04-22 23:20:44 +0000 | [diff] [blame] | 6145 | if (!FD->isLateTemplateParsed()) |
| 6146 | CheckForFunctionRedefinition(FD); |
Douglas Gregor | 6fc17ff | 2008-10-29 15:10:40 +0000 | [diff] [blame] | 6147 | |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 6148 | // Builtin functions cannot be defined. |
Douglas Gregor | 7814e6d | 2009-09-12 00:22:50 +0000 | [diff] [blame] | 6149 | if (unsigned BuiltinID = FD->getBuiltinID()) { |
Douglas Gregor | 655753a | 2009-02-17 16:03:01 +0000 | [diff] [blame] | 6150 | if (!Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) { |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 6151 | Diag(FD->getLocation(), diag::err_builtin_definition) << FD; |
Douglas Gregor | 655753a | 2009-02-17 16:03:01 +0000 | [diff] [blame] | 6152 | FD->setInvalidDecl(); |
| 6153 | } |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 6154 | } |
| 6155 | |
Eli Friedman | 7f0f5dc | 2009-03-04 07:30:59 +0000 | [diff] [blame] | 6156 | // The return type of a function definition must be complete |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 6157 | // (C99 6.9.1p3, C++ [dcl.fct]p6). |
| 6158 | QualType ResultType = FD->getResultType(); |
| 6159 | if (!ResultType->isDependentType() && !ResultType->isVoidType() && |
Chris Lattner | 65e6a09 | 2009-04-29 05:12:23 +0000 | [diff] [blame] | 6160 | !FD->isInvalidDecl() && |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 6161 | RequireCompleteType(FD->getLocation(), ResultType, |
| 6162 | diag::err_func_def_incomplete_result)) |
Eli Friedman | 7f0f5dc | 2009-03-04 07:30:59 +0000 | [diff] [blame] | 6163 | FD->setInvalidDecl(); |
Eli Friedman | 7f0f5dc | 2009-03-04 07:30:59 +0000 | [diff] [blame] | 6164 | |
Douglas Gregor | 8499f3f | 2009-03-31 16:35:03 +0000 | [diff] [blame] | 6165 | // GNU warning -Wmissing-prototypes: |
| 6166 | // Warn if a global function is defined without a previous |
| 6167 | // prototype declaration. This warning is issued even if the |
| 6168 | // definition itself provides a prototype. The aim is to detect |
| 6169 | // global functions that fail to be declared in header files. |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 6170 | if (ShouldWarnAboutMissingPrototype(FD)) |
| 6171 | Diag(FD->getLocation(), diag::warn_missing_prototype) << FD; |
Douglas Gregor | 8499f3f | 2009-03-31 16:35:03 +0000 | [diff] [blame] | 6172 | |
Douglas Gregor | e2c31ff | 2009-05-15 17:59:04 +0000 | [diff] [blame] | 6173 | if (FnBodyScope) |
| 6174 | PushDeclContext(FnBodyScope, FD); |
Anton Korobeynikov | 2f40270 | 2008-12-26 00:52:02 +0000 | [diff] [blame] | 6175 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 6176 | // Check the validity of our function parameters |
Douglas Gregor | 82aa713 | 2010-11-01 18:37:59 +0000 | [diff] [blame] | 6177 | CheckParmsForFunctionDef(FD->param_begin(), FD->param_end(), |
| 6178 | /*CheckParameterNames=*/true); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 6179 | |
| 6180 | // Introduce our parameters into the function scope |
| 6181 | for (unsigned p = 0, NumParams = FD->getNumParams(); p < NumParams; ++p) { |
| 6182 | ParmVarDecl *Param = FD->getParamDecl(p); |
Douglas Gregor | a8cc8ce | 2009-01-09 18:51:29 +0000 | [diff] [blame] | 6183 | Param->setOwningFunction(FD); |
| 6184 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 6185 | // If this has an identifier, add it to the scope stack. |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 6186 | if (Param->getIdentifier() && FnBodyScope) { |
Argyrios Kyrtzidis | 0827408 | 2010-12-15 18:44:22 +0000 | [diff] [blame] | 6187 | CheckShadow(FnBodyScope, Param); |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 6188 | |
Argyrios Kyrtzidis | 87f3ff0 | 2008-04-12 00:47:19 +0000 | [diff] [blame] | 6189 | PushOnScopeChains(Param, FnBodyScope); |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 6190 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6191 | } |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 6192 | |
Anton Korobeynikov | 2f40270 | 2008-12-26 00:52:02 +0000 | [diff] [blame] | 6193 | // Checking attributes of current function definition |
| 6194 | // dllimport attribute. |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 6195 | DLLImportAttr *DA = FD->getAttr<DLLImportAttr>(); |
| 6196 | if (DA && (!FD->getAttr<DLLExportAttr>())) { |
| 6197 | // dllimport attribute cannot be directly applied to definition. |
Francois Pichet | b613cd6 | 2011-03-29 10:39:17 +0000 | [diff] [blame] | 6198 | // Microsoft accepts dllimport for functions defined within class scope. |
| 6199 | if (!DA->isInherited() && |
| 6200 | !(LangOpts.Microsoft && FD->getLexicalDeclContext()->isRecord())) { |
Anton Korobeynikov | 2f40270 | 2008-12-26 00:52:02 +0000 | [diff] [blame] | 6201 | Diag(FD->getLocation(), |
| 6202 | diag::err_attribute_can_be_applied_only_to_symbol_declaration) |
| 6203 | << "dllimport"; |
| 6204 | FD->setInvalidDecl(); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6205 | return FD; |
Ted Kremenek | 12911a8 | 2010-02-21 05:12:53 +0000 | [diff] [blame] | 6206 | } |
| 6207 | |
| 6208 | // Visual C++ appears to not think this is an issue, so only issue |
| 6209 | // a warning when Microsoft extensions are disabled. |
| 6210 | if (!LangOpts.Microsoft) { |
Anton Korobeynikov | 2f40270 | 2008-12-26 00:52:02 +0000 | [diff] [blame] | 6211 | // If a symbol previously declared dllimport is later defined, the |
| 6212 | // attribute is ignored in subsequent references, and a warning is |
| 6213 | // emitted. |
| 6214 | Diag(FD->getLocation(), |
| 6215 | diag::warn_redeclaration_without_attribute_prev_attribute_ignored) |
Daniel Dunbar | 4087f27 | 2010-08-17 22:39:59 +0000 | [diff] [blame] | 6216 | << FD->getName() << "dllimport"; |
Anton Korobeynikov | 2f40270 | 2008-12-26 00:52:02 +0000 | [diff] [blame] | 6217 | } |
| 6218 | } |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6219 | return FD; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6220 | } |
| 6221 | |
Douglas Gregor | 5077c38 | 2010-05-15 06:01:05 +0000 | [diff] [blame] | 6222 | /// \brief Given the set of return statements within a function body, |
| 6223 | /// compute the variables that are subject to the named return value |
| 6224 | /// optimization. |
| 6225 | /// |
| 6226 | /// Each of the variables that is subject to the named return value |
| 6227 | /// optimization will be marked as NRVO variables in the AST, and any |
| 6228 | /// return statement that has a marked NRVO variable as its NRVO candidate can |
| 6229 | /// use the named return value optimization. |
| 6230 | /// |
| 6231 | /// This function applies a very simplistic algorithm for NRVO: if every return |
| 6232 | /// statement in the function has the same NRVO candidate, that candidate is |
| 6233 | /// the NRVO variable. |
| 6234 | /// |
| 6235 | /// FIXME: Employ a smarter algorithm that accounts for multiple return |
| 6236 | /// statements and the lifetimes of the NRVO candidates. We should be able to |
| 6237 | /// find a maximal set of NRVO variables. |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 6238 | static void ComputeNRVO(Stmt *Body, FunctionScopeInfo *Scope) { |
| 6239 | ReturnStmt **Returns = Scope->Returns.data(); |
| 6240 | |
Douglas Gregor | 5077c38 | 2010-05-15 06:01:05 +0000 | [diff] [blame] | 6241 | const VarDecl *NRVOCandidate = 0; |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 6242 | for (unsigned I = 0, E = Scope->Returns.size(); I != E; ++I) { |
Douglas Gregor | 5077c38 | 2010-05-15 06:01:05 +0000 | [diff] [blame] | 6243 | if (!Returns[I]->getNRVOCandidate()) |
| 6244 | return; |
| 6245 | |
| 6246 | if (!NRVOCandidate) |
| 6247 | NRVOCandidate = Returns[I]->getNRVOCandidate(); |
| 6248 | else if (NRVOCandidate != Returns[I]->getNRVOCandidate()) |
| 6249 | return; |
| 6250 | } |
| 6251 | |
| 6252 | if (NRVOCandidate) |
| 6253 | const_cast<VarDecl*>(NRVOCandidate)->setNRVOVariable(true); |
| 6254 | } |
| 6255 | |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 6256 | Decl *Sema::ActOnFinishFunctionBody(Decl *D, Stmt *BodyArg) { |
Douglas Gregor | e2c31ff | 2009-05-15 17:59:04 +0000 | [diff] [blame] | 6257 | return ActOnFinishFunctionBody(D, move(BodyArg), false); |
| 6258 | } |
| 6259 | |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 6260 | Decl *Sema::ActOnFinishFunctionBody(Decl *dcl, Stmt *Body, |
| 6261 | bool IsInstantiation) { |
Douglas Gregor | d83d040 | 2009-08-22 00:34:47 +0000 | [diff] [blame] | 6262 | FunctionDecl *FD = 0; |
| 6263 | FunctionTemplateDecl *FunTmpl = dyn_cast_or_null<FunctionTemplateDecl>(dcl); |
| 6264 | if (FunTmpl) |
| 6265 | FD = FunTmpl->getTemplatedDecl(); |
| 6266 | else |
| 6267 | FD = dyn_cast_or_null<FunctionDecl>(dcl); |
| 6268 | |
Ted Kremenek | d064fdc | 2010-03-23 00:13:23 +0000 | [diff] [blame] | 6269 | sema::AnalysisBasedWarnings::Policy WP = AnalysisWarnings.getDefaultPolicy(); |
Ted Kremenek | 3ed6fc0 | 2011-02-23 01:51:48 +0000 | [diff] [blame] | 6270 | sema::AnalysisBasedWarnings::Policy *ActivePolicy = 0; |
Ted Kremenek | dbdbaaf | 2010-03-20 21:06:02 +0000 | [diff] [blame] | 6271 | |
Douglas Gregor | d83d040 | 2009-08-22 00:34:47 +0000 | [diff] [blame] | 6272 | if (FD) { |
Chris Lattner | a5251fc | 2009-04-18 09:36:27 +0000 | [diff] [blame] | 6273 | FD->setBody(Body); |
Ted Kremenek | dbdbaaf | 2010-03-20 21:06:02 +0000 | [diff] [blame] | 6274 | if (FD->isMain()) { |
Mike Stump | 5f28a1e | 2009-07-24 02:49:01 +0000 | [diff] [blame] | 6275 | // C and C++ allow for main to automagically return 0. |
John McCall | 0cfeb63 | 2009-07-28 01:00:58 +0000 | [diff] [blame] | 6276 | // Implements C++ [basic.start.main]p5 and C99 5.1.2.2.3. |
| 6277 | FD->setHasImplicitReturnZero(true); |
Ted Kremenek | d064fdc | 2010-03-23 00:13:23 +0000 | [diff] [blame] | 6278 | WP.disableCheckFallThrough(); |
Ted Kremenek | dbdbaaf | 2010-03-20 21:06:02 +0000 | [diff] [blame] | 6279 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6280 | |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 6281 | if (!FD->isInvalidDecl()) { |
Douglas Gregor | e0762c9 | 2009-06-19 23:52:42 +0000 | [diff] [blame] | 6282 | DiagnoseUnusedParameters(FD->param_begin(), FD->param_end()); |
Argyrios Kyrtzidis | 3532fdd | 2010-11-17 23:11:54 +0000 | [diff] [blame] | 6283 | DiagnoseSizeOfParametersAndReturnValue(FD->param_begin(), FD->param_end(), |
| 6284 | FD->getResultType(), FD); |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 6285 | |
| 6286 | // If this is a constructor, we need a vtable. |
| 6287 | if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(FD)) |
| 6288 | MarkVTableUsed(FD->getLocation(), Constructor->getParent()); |
Douglas Gregor | 5077c38 | 2010-05-15 06:01:05 +0000 | [diff] [blame] | 6289 | |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 6290 | ComputeNRVO(Body, getCurFunction()); |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 6291 | } |
| 6292 | |
Argyrios Kyrtzidis | 53d0ea5 | 2008-06-28 06:07:14 +0000 | [diff] [blame] | 6293 | assert(FD == getCurFunctionDecl() && "Function parsing confused"); |
Steve Naroff | 394f3f4 | 2008-07-25 17:57:26 +0000 | [diff] [blame] | 6294 | } else if (ObjCMethodDecl *MD = dyn_cast_or_null<ObjCMethodDecl>(dcl)) { |
Chris Lattner | ffed163 | 2009-02-16 19:27:54 +0000 | [diff] [blame] | 6295 | assert(MD == getCurMethodDecl() && "Method parsing confused"); |
Chris Lattner | a5251fc | 2009-04-18 09:36:27 +0000 | [diff] [blame] | 6296 | MD->setBody(Body); |
Argyrios Kyrtzidis | 0fe5397 | 2011-01-03 22:33:06 +0000 | [diff] [blame] | 6297 | if (Body) |
| 6298 | MD->setEndLoc(Body->getLocEnd()); |
Argyrios Kyrtzidis | 3532fdd | 2010-11-17 23:11:54 +0000 | [diff] [blame] | 6299 | if (!MD->isInvalidDecl()) { |
Douglas Gregor | e0762c9 | 2009-06-19 23:52:42 +0000 | [diff] [blame] | 6300 | DiagnoseUnusedParameters(MD->param_begin(), MD->param_end()); |
Argyrios Kyrtzidis | 3532fdd | 2010-11-17 23:11:54 +0000 | [diff] [blame] | 6301 | DiagnoseSizeOfParametersAndReturnValue(MD->param_begin(), MD->param_end(), |
| 6302 | MD->getResultType(), MD); |
| 6303 | } |
Ted Kremenek | 8189cde | 2009-02-07 01:47:29 +0000 | [diff] [blame] | 6304 | } else { |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6305 | return 0; |
Ted Kremenek | 8189cde | 2009-02-07 01:47:29 +0000 | [diff] [blame] | 6306 | } |
Douglas Gregor | e2c31ff | 2009-05-15 17:59:04 +0000 | [diff] [blame] | 6307 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6308 | // Verify and clean out per-function state. |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 6309 | if (Body) { |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 6310 | // C++ constructors that have function-try-blocks can't have return |
| 6311 | // statements in the handlers of that block. (C++ [except.handle]p14) |
| 6312 | // Verify this. |
| 6313 | if (FD && isa<CXXConstructorDecl>(FD) && isa<CXXTryStmt>(Body)) |
| 6314 | DiagnoseReturnInConstructorExceptionHandler(cast<CXXTryStmt>(Body)); |
| 6315 | |
Ted Kremenek | dbdbaaf | 2010-03-20 21:06:02 +0000 | [diff] [blame] | 6316 | // Verify that that gotos and switch cases don't jump into scopes illegally. |
| 6317 | // Verify that that gotos and switch cases don't jump into scopes illegally. |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 6318 | if (getCurFunction()->NeedsScopeChecking() && |
John McCall | 8a2ca74 | 2010-05-20 07:13:26 +0000 | [diff] [blame] | 6319 | !dcl->isInvalidDecl() && |
John McCall | dae69ef | 2010-05-20 07:05:55 +0000 | [diff] [blame] | 6320 | !hasAnyErrorsInThisFunction()) |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 6321 | DiagnoseInvalidJumps(Body); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6322 | |
John McCall | 1544282 | 2010-08-04 01:04:25 +0000 | [diff] [blame] | 6323 | if (CXXDestructorDecl *Destructor = dyn_cast<CXXDestructorDecl>(dcl)) { |
| 6324 | if (!Destructor->getParent()->isDependentType()) |
| 6325 | CheckDestructor(Destructor); |
| 6326 | |
John McCall | ef027fe | 2010-03-16 21:39:52 +0000 | [diff] [blame] | 6327 | MarkBaseAndMemberDestructorsReferenced(Destructor->getLocation(), |
| 6328 | Destructor->getParent()); |
John McCall | 1544282 | 2010-08-04 01:04:25 +0000 | [diff] [blame] | 6329 | } |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 6330 | |
| 6331 | // If any errors have occurred, clear out any temporaries that may have |
| 6332 | // been leftover. This ensures that these temporaries won't be picked up for |
| 6333 | // deletion in some later function. |
Douglas Gregor | 26cd44d | 2011-03-04 23:08:02 +0000 | [diff] [blame] | 6334 | if (PP.getDiagnostics().hasErrorOccurred() || |
| 6335 | PP.getDiagnostics().getSuppressAllDiagnostics()) |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 6336 | ExprTemporaries.clear(); |
Ted Kremenek | dbdbaaf | 2010-03-20 21:06:02 +0000 | [diff] [blame] | 6337 | else if (!isa<FunctionTemplateDecl>(dcl)) { |
| 6338 | // Since the body is valid, issue any analysis-based warnings that are |
| 6339 | // enabled. |
Ted Kremenek | 3ed6fc0 | 2011-02-23 01:51:48 +0000 | [diff] [blame] | 6340 | ActivePolicy = &WP; |
Ted Kremenek | dbdbaaf | 2010-03-20 21:06:02 +0000 | [diff] [blame] | 6341 | } |
| 6342 | |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 6343 | assert(ExprTemporaries.empty() && "Leftover temporaries in function"); |
| 6344 | } |
| 6345 | |
John McCall | 90f9789 | 2010-03-25 22:08:03 +0000 | [diff] [blame] | 6346 | if (!IsInstantiation) |
| 6347 | PopDeclContext(); |
| 6348 | |
Ted Kremenek | 3ed6fc0 | 2011-02-23 01:51:48 +0000 | [diff] [blame] | 6349 | PopFunctionOrBlockScope(ActivePolicy, dcl); |
Anders Carlsson | f8a9a79 | 2009-11-13 19:21:49 +0000 | [diff] [blame] | 6350 | |
Douglas Gregor | d5b5728 | 2009-11-15 07:07:58 +0000 | [diff] [blame] | 6351 | // If any errors have occurred, clear out any temporaries that may have |
| 6352 | // been leftover. This ensures that these temporaries won't be picked up for |
| 6353 | // deletion in some later function. |
Chris Lattner | 6d97e5e | 2010-03-01 20:59:53 +0000 | [diff] [blame] | 6354 | if (getDiagnostics().hasErrorOccurred()) |
Douglas Gregor | d5b5728 | 2009-11-15 07:07:58 +0000 | [diff] [blame] | 6355 | ExprTemporaries.clear(); |
Argyrios Kyrtzidis | 49b96d1 | 2010-08-13 18:42:17 +0000 | [diff] [blame] | 6356 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6357 | return dcl; |
Fariborz Jahanian | 60fbca0 | 2007-11-10 16:31:34 +0000 | [diff] [blame] | 6358 | } |
| 6359 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6360 | /// ImplicitlyDefineFunction - An undeclared identifier was used in a function |
| 6361 | /// call, forming a call to an implicitly defined function (per C99 6.5.1p2). |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6362 | NamedDecl *Sema::ImplicitlyDefineFunction(SourceLocation Loc, |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 6363 | IdentifierInfo &II, Scope *S) { |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 6364 | // Before we produce a declaration for an implicitly defined |
| 6365 | // function, see whether there was a locally-scoped declaration of |
| 6366 | // this name as a function or variable. If so, use that |
| 6367 | // (non-visible) declaration, and complain about it. |
| 6368 | llvm::DenseMap<DeclarationName, NamedDecl *>::iterator Pos |
| 6369 | = LocallyScopedExternalDecls.find(&II); |
| 6370 | if (Pos != LocallyScopedExternalDecls.end()) { |
| 6371 | Diag(Loc, diag::warn_use_out_of_scope_declaration) << Pos->second; |
| 6372 | Diag(Pos->second->getLocation(), diag::note_previous_declaration); |
| 6373 | return Pos->second; |
| 6374 | } |
| 6375 | |
Chris Lattner | 37d1084 | 2008-05-05 21:18:06 +0000 | [diff] [blame] | 6376 | // Extension in C99. Legal in C90, but warn about it. |
Daniel Dunbar | 01eb9b9 | 2009-10-18 21:17:35 +0000 | [diff] [blame] | 6377 | if (II.getName().startswith("__builtin_")) |
Douglas Gregor | 9a8c9a2 | 2009-09-28 21:14:19 +0000 | [diff] [blame] | 6378 | Diag(Loc, diag::warn_builtin_unknown) << &II; |
| 6379 | else if (getLangOptions().C99) |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 6380 | Diag(Loc, diag::ext_implicit_function_decl) << &II; |
Chris Lattner | 37d1084 | 2008-05-05 21:18:06 +0000 | [diff] [blame] | 6381 | else |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 6382 | Diag(Loc, diag::warn_implicit_function_decl) << &II; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6383 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6384 | // Set a Declarator for the implicit definition: int foo(); |
| 6385 | const char *Dummy; |
John McCall | 0b7e678 | 2011-03-24 11:26:52 +0000 | [diff] [blame] | 6386 | AttributeFactory attrFactory; |
| 6387 | DeclSpec DS(attrFactory); |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 6388 | unsigned DiagID; |
| 6389 | bool Error = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, Dummy, DiagID); |
Jeffrey Yasskin | c6ed729 | 2010-12-23 01:01:28 +0000 | [diff] [blame] | 6390 | (void)Error; // Silence warning. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6391 | assert(!Error && "Error setting up implicit decl!"); |
| 6392 | Declarator D(DS, Declarator::BlockContext); |
John McCall | 0b7e678 | 2011-03-24 11:26:52 +0000 | [diff] [blame] | 6393 | D.AddTypeInfo(DeclaratorChunk::getFunction(false, false, SourceLocation(), 0, |
Douglas Gregor | 83f5172 | 2011-01-26 03:43:54 +0000 | [diff] [blame] | 6394 | 0, 0, true, SourceLocation(), |
Sebastian Redl | 6e5d319 | 2011-03-05 22:42:13 +0000 | [diff] [blame] | 6395 | EST_None, SourceLocation(), |
| 6396 | 0, 0, 0, 0, Loc, Loc, D), |
John McCall | 0b7e678 | 2011-03-24 11:26:52 +0000 | [diff] [blame] | 6397 | DS.getAttributes(), |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 6398 | SourceLocation()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6399 | D.SetIdentifier(&II, Loc); |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 6400 | |
Argyrios Kyrtzidis | 93213bb | 2008-05-01 21:04:16 +0000 | [diff] [blame] | 6401 | // Insert this function into translation-unit scope. |
| 6402 | |
| 6403 | DeclContext *PrevDC = CurContext; |
| 6404 | CurContext = Context.getTranslationUnitDecl(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6405 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6406 | FunctionDecl *FD = dyn_cast<FunctionDecl>(ActOnDeclarator(TUScope, D)); |
Steve Naroff | e2ef815 | 2008-04-04 14:32:09 +0000 | [diff] [blame] | 6407 | FD->setImplicit(); |
Argyrios Kyrtzidis | 93213bb | 2008-05-01 21:04:16 +0000 | [diff] [blame] | 6408 | |
| 6409 | CurContext = PrevDC; |
| 6410 | |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 6411 | AddKnownFunctionAttributes(FD); |
| 6412 | |
Steve Naroff | e2ef815 | 2008-04-04 14:32:09 +0000 | [diff] [blame] | 6413 | return FD; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6414 | } |
| 6415 | |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 6416 | /// \brief Adds any function attributes that we know a priori based on |
| 6417 | /// the declaration of this function. |
| 6418 | /// |
| 6419 | /// These attributes can apply both to implicitly-declared builtins |
| 6420 | /// (like __builtin___printf_chk) or to library-declared functions |
| 6421 | /// like NSLog or printf. |
| 6422 | void Sema::AddKnownFunctionAttributes(FunctionDecl *FD) { |
| 6423 | if (FD->isInvalidDecl()) |
| 6424 | return; |
| 6425 | |
| 6426 | // If this is a built-in function, map its builtin attributes to |
| 6427 | // actual attributes. |
Douglas Gregor | 7814e6d | 2009-09-12 00:22:50 +0000 | [diff] [blame] | 6428 | if (unsigned BuiltinID = FD->getBuiltinID()) { |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 6429 | // Handle printf-formatting attributes. |
| 6430 | unsigned FormatIdx; |
| 6431 | bool HasVAListArg; |
| 6432 | if (Context.BuiltinInfo.isPrintfLike(BuiltinID, FormatIdx, HasVAListArg)) { |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 6433 | if (!FD->getAttr<FormatAttr>()) |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 6434 | FD->addAttr(::new (Context) FormatAttr(FD->getLocation(), Context, |
| 6435 | "printf", FormatIdx+1, |
Ted Kremenek | 3d2c43e | 2010-02-11 05:28:37 +0000 | [diff] [blame] | 6436 | HasVAListArg ? 0 : FormatIdx+2)); |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 6437 | } |
Ted Kremenek | bee05c1 | 2010-07-16 02:11:15 +0000 | [diff] [blame] | 6438 | if (Context.BuiltinInfo.isScanfLike(BuiltinID, FormatIdx, |
| 6439 | HasVAListArg)) { |
| 6440 | if (!FD->getAttr<FormatAttr>()) |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 6441 | FD->addAttr(::new (Context) FormatAttr(FD->getLocation(), Context, |
| 6442 | "scanf", FormatIdx+1, |
Ted Kremenek | bee05c1 | 2010-07-16 02:11:15 +0000 | [diff] [blame] | 6443 | HasVAListArg ? 0 : FormatIdx+2)); |
| 6444 | } |
Daniel Dunbar | ef2abfe | 2009-02-16 22:43:43 +0000 | [diff] [blame] | 6445 | |
| 6446 | // Mark const if we don't care about errno and that is the only |
| 6447 | // thing preventing the function from being const. This allows |
| 6448 | // IRgen to use LLVM intrinsics for such functions. |
| 6449 | if (!getLangOptions().MathErrno && |
| 6450 | Context.BuiltinInfo.isConstWithoutErrno(BuiltinID)) { |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 6451 | if (!FD->getAttr<ConstAttr>()) |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 6452 | FD->addAttr(::new (Context) ConstAttr(FD->getLocation(), Context)); |
Daniel Dunbar | ef2abfe | 2009-02-16 22:43:43 +0000 | [diff] [blame] | 6453 | } |
Mike Stump | 0feecbb | 2009-07-27 19:14:18 +0000 | [diff] [blame] | 6454 | |
Chris Lattner | 551f708 | 2009-12-30 22:06:22 +0000 | [diff] [blame] | 6455 | if (Context.BuiltinInfo.isNoThrow(BuiltinID)) |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 6456 | FD->addAttr(::new (Context) NoThrowAttr(FD->getLocation(), Context)); |
Chris Lattner | 551f708 | 2009-12-30 22:06:22 +0000 | [diff] [blame] | 6457 | if (Context.BuiltinInfo.isConst(BuiltinID)) |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 6458 | FD->addAttr(::new (Context) ConstAttr(FD->getLocation(), Context)); |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 6459 | } |
| 6460 | |
| 6461 | IdentifierInfo *Name = FD->getIdentifier(); |
| 6462 | if (!Name) |
| 6463 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6464 | if ((!getLangOptions().CPlusPlus && |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 6465 | FD->getDeclContext()->isTranslationUnit()) || |
| 6466 | (isa<LinkageSpecDecl>(FD->getDeclContext()) && |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6467 | cast<LinkageSpecDecl>(FD->getDeclContext())->getLanguage() == |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 6468 | LinkageSpecDecl::lang_c)) { |
| 6469 | // Okay: this could be a libc/libm/Objective-C function we know |
| 6470 | // about. |
| 6471 | } else |
| 6472 | return; |
| 6473 | |
Douglas Gregor | 21e072b | 2009-04-22 20:56:09 +0000 | [diff] [blame] | 6474 | if (Name->isStr("NSLog") || Name->isStr("NSLogv")) { |
Mike Stump | 523a8fd | 2009-07-28 00:07:08 +0000 | [diff] [blame] | 6475 | // FIXME: NSLog and NSLogv should be target specific |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 6476 | if (const FormatAttr *Format = FD->getAttr<FormatAttr>()) { |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 6477 | // FIXME: We known better than our headers. |
Ted Kremenek | 3d2c43e | 2010-02-11 05:28:37 +0000 | [diff] [blame] | 6478 | const_cast<FormatAttr *>(Format)->setType(Context, "printf"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6479 | } else |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 6480 | FD->addAttr(::new (Context) FormatAttr(FD->getLocation(), Context, |
| 6481 | "printf", 1, |
Eli Friedman | d7dad72 | 2009-06-10 04:01:38 +0000 | [diff] [blame] | 6482 | Name->isStr("NSLogv") ? 0 : 2)); |
Douglas Gregor | 21e072b | 2009-04-22 20:56:09 +0000 | [diff] [blame] | 6483 | } else if (Name->isStr("asprintf") || Name->isStr("vasprintf")) { |
Mike Stump | 523a8fd | 2009-07-28 00:07:08 +0000 | [diff] [blame] | 6484 | // FIXME: asprintf and vasprintf aren't C99 functions. Should they be |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6485 | // target-specific builtins, perhaps? |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 6486 | if (!FD->getAttr<FormatAttr>()) |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 6487 | FD->addAttr(::new (Context) FormatAttr(FD->getLocation(), Context, |
| 6488 | "printf", 2, |
Eli Friedman | d7dad72 | 2009-06-10 04:01:38 +0000 | [diff] [blame] | 6489 | Name->isStr("vasprintf") ? 0 : 3)); |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 6490 | } |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 6491 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6492 | |
John McCall | ba6a9bd | 2009-10-24 08:00:42 +0000 | [diff] [blame] | 6493 | TypedefDecl *Sema::ParseTypedefDecl(Scope *S, Declarator &D, QualType T, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 6494 | TypeSourceInfo *TInfo) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6495 | assert(D.getIdentifier() && "Wrong callback for declspec without declarator"); |
Steve Naroff | 5912a35 | 2007-08-28 20:14:24 +0000 | [diff] [blame] | 6496 | assert(!T.isNull() && "GetTypeForDeclarator() returned null type"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6497 | |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 6498 | if (!TInfo) { |
John McCall | ba6a9bd | 2009-10-24 08:00:42 +0000 | [diff] [blame] | 6499 | assert(D.isInvalidType() && "no declarator info for valid type"); |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 6500 | TInfo = Context.getTrivialTypeSourceInfo(T); |
John McCall | ba6a9bd | 2009-10-24 08:00:42 +0000 | [diff] [blame] | 6501 | } |
| 6502 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6503 | // Scope manipulation handled by caller. |
Chris Lattner | 0ed844b | 2008-04-04 06:12:32 +0000 | [diff] [blame] | 6504 | TypedefDecl *NewTD = TypedefDecl::Create(Context, CurContext, |
Abramo Bagnara | 344577e | 2011-03-06 15:48:19 +0000 | [diff] [blame] | 6505 | D.getSourceRange().getBegin(), |
Chris Lattner | 0ed844b | 2008-04-04 06:12:32 +0000 | [diff] [blame] | 6506 | D.getIdentifierLoc(), |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6507 | D.getIdentifier(), |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 6508 | TInfo); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6509 | |
John McCall | cde5a40 | 2011-02-01 08:20:08 +0000 | [diff] [blame] | 6510 | // Bail out immediately if we have an invalid declaration. |
| 6511 | if (D.isInvalidType()) { |
| 6512 | NewTD->setInvalidDecl(); |
| 6513 | return NewTD; |
Anders Carlsson | 4843e58 | 2009-03-10 17:07:44 +0000 | [diff] [blame] | 6514 | } |
| 6515 | |
John McCall | cde5a40 | 2011-02-01 08:20:08 +0000 | [diff] [blame] | 6516 | // C++ [dcl.typedef]p8: |
| 6517 | // If the typedef declaration defines an unnamed class (or |
| 6518 | // enum), the first typedef-name declared by the declaration |
| 6519 | // to be that class type (or enum type) is used to denote the |
| 6520 | // class type (or enum type) for linkage purposes only. |
| 6521 | // We need to check whether the type was declared in the declaration. |
| 6522 | switch (D.getDeclSpec().getTypeSpecType()) { |
| 6523 | case TST_enum: |
| 6524 | case TST_struct: |
| 6525 | case TST_union: |
| 6526 | case TST_class: { |
| 6527 | TagDecl *tagFromDeclSpec = cast<TagDecl>(D.getDeclSpec().getRepAsDecl()); |
| 6528 | |
| 6529 | // Do nothing if the tag is not anonymous or already has an |
| 6530 | // associated typedef (from an earlier typedef in this decl group). |
| 6531 | if (tagFromDeclSpec->getIdentifier()) break; |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 6532 | if (tagFromDeclSpec->getTypedefNameForAnonDecl()) break; |
John McCall | cde5a40 | 2011-02-01 08:20:08 +0000 | [diff] [blame] | 6533 | |
| 6534 | // A well-formed anonymous tag must always be a TUK_Definition. |
| 6535 | assert(tagFromDeclSpec->isThisDeclarationADefinition()); |
| 6536 | |
| 6537 | // The type must match the tag exactly; no qualifiers allowed. |
| 6538 | if (!Context.hasSameType(T, Context.getTagDeclType(tagFromDeclSpec))) |
| 6539 | break; |
| 6540 | |
| 6541 | // Otherwise, set this is the anon-decl typedef for the tag. |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 6542 | tagFromDeclSpec->setTypedefNameForAnonDecl(NewTD); |
John McCall | cde5a40 | 2011-02-01 08:20:08 +0000 | [diff] [blame] | 6543 | break; |
| 6544 | } |
| 6545 | |
| 6546 | default: |
| 6547 | break; |
| 6548 | } |
| 6549 | |
Steve Naroff | 5912a35 | 2007-08-28 20:14:24 +0000 | [diff] [blame] | 6550 | return NewTD; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6551 | } |
| 6552 | |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 6553 | |
| 6554 | /// \brief Determine whether a tag with a given kind is acceptable |
| 6555 | /// as a redeclaration of the given tag declaration. |
| 6556 | /// |
| 6557 | /// \returns true if the new tag kind is acceptable, false otherwise. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6558 | bool Sema::isAcceptableTagRedeclaration(const TagDecl *Previous, |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 6559 | TagTypeKind NewTag, |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 6560 | SourceLocation NewTagLoc, |
| 6561 | const IdentifierInfo &Name) { |
| 6562 | // C++ [dcl.type.elab]p3: |
| 6563 | // The class-key or enum keyword present in the |
| 6564 | // elaborated-type-specifier shall agree in kind with the |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 6565 | // declaration to which the name in the elaborated-type-specifier |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 6566 | // refers. This rule also applies to the form of |
| 6567 | // elaborated-type-specifier that declares a class-name or |
| 6568 | // friend class since it can be construed as referring to the |
| 6569 | // definition of the class. Thus, in any |
| 6570 | // elaborated-type-specifier, the enum keyword shall be used to |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 6571 | // refer to an enumeration (7.2), the union class-key shall be |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 6572 | // used to refer to a union (clause 9), and either the class or |
| 6573 | // struct class-key shall be used to refer to a class (clause 9) |
| 6574 | // declared using the class or struct class-key. |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 6575 | TagTypeKind OldTag = Previous->getTagKind(); |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 6576 | if (OldTag == NewTag) |
| 6577 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6578 | |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 6579 | if ((OldTag == TTK_Struct || OldTag == TTK_Class) && |
| 6580 | (NewTag == TTK_Struct || NewTag == TTK_Class)) { |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 6581 | // Warn about the struct/class tag mismatch. |
| 6582 | bool isTemplate = false; |
| 6583 | if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(Previous)) |
| 6584 | isTemplate = Record->getDescribedClassTemplate(); |
| 6585 | |
| 6586 | Diag(NewTagLoc, diag::warn_struct_class_tag_mismatch) |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 6587 | << (NewTag == TTK_Class) |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 6588 | << isTemplate << &Name |
Douglas Gregor | 849b243 | 2010-03-31 17:46:05 +0000 | [diff] [blame] | 6589 | << FixItHint::CreateReplacement(SourceRange(NewTagLoc), |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 6590 | OldTag == TTK_Class? "class" : "struct"); |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 6591 | Diag(Previous->getLocation(), diag::note_previous_use); |
| 6592 | return true; |
| 6593 | } |
| 6594 | return false; |
| 6595 | } |
| 6596 | |
Steve Naroff | 08d92e4 | 2007-09-15 18:49:24 +0000 | [diff] [blame] | 6597 | /// ActOnTag - This is invoked when we see 'struct foo' or 'struct {'. In the |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6598 | /// former case, Name will be non-null. In the later case, Name will be null. |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 6599 | /// TagSpec indicates what kind of tag this is. TUK indicates whether this is a |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6600 | /// reference/declaration/definition of a tag. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6601 | Decl *Sema::ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, |
Douglas Gregor | 069ea64 | 2010-09-16 23:58:57 +0000 | [diff] [blame] | 6602 | SourceLocation KWLoc, CXXScopeSpec &SS, |
| 6603 | IdentifierInfo *Name, SourceLocation NameLoc, |
| 6604 | AttributeList *Attr, AccessSpecifier AS, |
| 6605 | MultiTemplateParamsArg TemplateParameterLists, |
Abramo Bagnara | a88cefd | 2010-12-03 18:54:17 +0000 | [diff] [blame] | 6606 | bool &OwnedDecl, bool &IsDependent, |
| 6607 | bool ScopedEnum, bool ScopedEnumUsesClassTag, |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 6608 | TypeResult UnderlyingType) { |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6609 | // If this is not a definition, it must have a name. |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 6610 | assert((Name != 0 || TUK == TUK_Definition) && |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6611 | "Nameless record must be a definition!"); |
John McCall | 9a34edb | 2010-10-19 01:40:49 +0000 | [diff] [blame] | 6612 | assert(TemplateParameterLists.size() == 0 || TUK != TUK_Reference); |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 6613 | |
Douglas Gregor | 402abb5 | 2009-05-28 23:31:59 +0000 | [diff] [blame] | 6614 | OwnedDecl = false; |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 6615 | TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6616 | |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 6617 | // FIXME: Check explicit specializations more carefully. |
| 6618 | bool isExplicitSpecialization = false; |
Douglas Gregor | 0167f3c | 2010-07-14 23:14:12 +0000 | [diff] [blame] | 6619 | bool Invalid = false; |
John McCall | 9a34edb | 2010-10-19 01:40:49 +0000 | [diff] [blame] | 6620 | |
| 6621 | // We only need to do this matching if we have template parameters |
| 6622 | // or a scope specifier, which also conveniently avoids this work |
| 6623 | // for non-C++ cases. |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 6624 | if (TemplateParameterLists.size() > 0 || |
John McCall | 9a34edb | 2010-10-19 01:40:49 +0000 | [diff] [blame] | 6625 | (SS.isNotEmpty() && TUK != TUK_Reference)) { |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 6626 | if (TemplateParameterList *TemplateParams |
| 6627 | = MatchTemplateParametersToScopeSpecifier(KWLoc, SS, |
John McCall | be04b6d | 2010-10-16 07:23:36 +0000 | [diff] [blame] | 6628 | TemplateParameterLists.get(), |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 6629 | TemplateParameterLists.size(), |
John McCall | 77e8b11 | 2010-04-13 20:37:33 +0000 | [diff] [blame] | 6630 | TUK == TUK_Friend, |
Douglas Gregor | 0167f3c | 2010-07-14 23:14:12 +0000 | [diff] [blame] | 6631 | isExplicitSpecialization, |
| 6632 | Invalid)) { |
Douglas Gregor | d85bea2 | 2009-09-26 06:47:28 +0000 | [diff] [blame] | 6633 | if (TemplateParams->size() > 0) { |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 6634 | // This is a declaration or definition of a class template (which may |
| 6635 | // be a member of another template). |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 6636 | |
Douglas Gregor | 0167f3c | 2010-07-14 23:14:12 +0000 | [diff] [blame] | 6637 | if (Invalid) |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6638 | return 0; |
Abramo Bagnara | c57c17d | 2011-03-10 13:28:31 +0000 | [diff] [blame] | 6639 | |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 6640 | OwnedDecl = false; |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 6641 | DeclResult Result = CheckClassTemplate(S, TagSpec, TUK, KWLoc, |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 6642 | SS, Name, NameLoc, Attr, |
Abramo Bagnara | c57c17d | 2011-03-10 13:28:31 +0000 | [diff] [blame] | 6643 | TemplateParams, AS, |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 6644 | TemplateParameterLists.size() - 1, |
Abramo Bagnara | c57c17d | 2011-03-10 13:28:31 +0000 | [diff] [blame] | 6645 | (TemplateParameterList**) TemplateParameterLists.release()); |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 6646 | return Result.get(); |
| 6647 | } else { |
Douglas Gregor | f6b1185 | 2009-10-08 15:14:33 +0000 | [diff] [blame] | 6648 | // The "template<>" header is extraneous. |
| 6649 | Diag(TemplateParams->getTemplateLoc(), diag::err_template_tag_noparams) |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 6650 | << TypeWithKeyword::getTagTypeKindName(Kind) << Name; |
Douglas Gregor | f6b1185 | 2009-10-08 15:14:33 +0000 | [diff] [blame] | 6651 | isExplicitSpecialization = true; |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 6652 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6653 | } |
| 6654 | } |
| 6655 | |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 6656 | // Figure out the underlying type if this a enum declaration. We need to do |
| 6657 | // this early, because it's needed to detect if this is an incompatible |
| 6658 | // redeclaration. |
| 6659 | llvm::PointerUnion<const Type*, TypeSourceInfo*> EnumUnderlying; |
| 6660 | |
| 6661 | if (Kind == TTK_Enum) { |
| 6662 | if (UnderlyingType.isInvalid() || (!UnderlyingType.get() && ScopedEnum)) |
| 6663 | // No underlying type explicitly specified, or we failed to parse the |
| 6664 | // type, default to int. |
| 6665 | EnumUnderlying = Context.IntTy.getTypePtr(); |
| 6666 | else if (UnderlyingType.get()) { |
| 6667 | // C++0x 7.2p2: The type-specifier-seq of an enum-base shall name an |
| 6668 | // integral type; any cv-qualification is ignored. |
| 6669 | TypeSourceInfo *TI = 0; |
| 6670 | QualType T = GetTypeFromParser(UnderlyingType.get(), &TI); |
| 6671 | EnumUnderlying = TI; |
| 6672 | |
| 6673 | SourceLocation UnderlyingLoc = TI->getTypeLoc().getBeginLoc(); |
| 6674 | |
| 6675 | if (!T->isDependentType() && !T->isIntegralType(Context)) { |
| 6676 | Diag(UnderlyingLoc, diag::err_enum_invalid_underlying) |
| 6677 | << T; |
| 6678 | // Recover by falling back to int. |
| 6679 | EnumUnderlying = Context.IntTy.getTypePtr(); |
| 6680 | } |
Douglas Gregor | 0c9e479 | 2010-12-16 00:24:44 +0000 | [diff] [blame] | 6681 | |
| 6682 | if (DiagnoseUnexpandedParameterPack(UnderlyingLoc, TI, |
| 6683 | UPPC_FixedUnderlyingType)) |
| 6684 | EnumUnderlying = Context.IntTy.getTypePtr(); |
| 6685 | |
Francois Pichet | 842e7a2 | 2010-10-18 15:01:13 +0000 | [diff] [blame] | 6686 | } else if (getLangOptions().Microsoft) |
| 6687 | // Microsoft enums are always of int type. |
| 6688 | EnumUnderlying = Context.IntTy.getTypePtr(); |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 6689 | } |
| 6690 | |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 6691 | DeclContext *SearchDC = CurContext; |
Argyrios Kyrtzidis | 0f84a23 | 2008-11-09 22:53:32 +0000 | [diff] [blame] | 6692 | DeclContext *DC = CurContext; |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 6693 | bool isStdBadAlloc = false; |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 6694 | |
Chandler Carruth | 7bf3600 | 2010-03-01 21:17:36 +0000 | [diff] [blame] | 6695 | RedeclarationKind Redecl = ForRedeclaration; |
| 6696 | if (TUK == TUK_Friend || TUK == TUK_Reference) |
| 6697 | Redecl = NotForRedeclaration; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6698 | |
| 6699 | LookupResult Previous(*this, Name, NameLoc, LookupTagName, Redecl); |
John McCall | 6e24726 | 2009-10-10 05:48:19 +0000 | [diff] [blame] | 6700 | |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 6701 | if (Name && SS.isNotEmpty()) { |
| 6702 | // We have a nested-name tag ('struct foo::bar'). |
| 6703 | |
| 6704 | // Check for invalid 'foo::'. |
Argyrios Kyrtzidis | 0f84a23 | 2008-11-09 22:53:32 +0000 | [diff] [blame] | 6705 | if (SS.isInvalid()) { |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 6706 | Name = 0; |
| 6707 | goto CreateNewDecl; |
| 6708 | } |
| 6709 | |
John McCall | c4e7019 | 2009-09-11 04:59:25 +0000 | [diff] [blame] | 6710 | // If this is a friend or a reference to a class in a dependent |
| 6711 | // context, don't try to make a decl for it. |
| 6712 | if (TUK == TUK_Friend || TUK == TUK_Reference) { |
| 6713 | DC = computeDeclContext(SS, false); |
| 6714 | if (!DC) { |
| 6715 | IsDependent = true; |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6716 | return 0; |
John McCall | c4e7019 | 2009-09-11 04:59:25 +0000 | [diff] [blame] | 6717 | } |
John McCall | 77bb1aa | 2010-05-01 00:40:08 +0000 | [diff] [blame] | 6718 | } else { |
| 6719 | DC = computeDeclContext(SS, true); |
| 6720 | if (!DC) { |
| 6721 | Diag(SS.getRange().getBegin(), diag::err_dependent_nested_name_spec) |
| 6722 | << SS.getRange(); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6723 | return 0; |
John McCall | 77bb1aa | 2010-05-01 00:40:08 +0000 | [diff] [blame] | 6724 | } |
John McCall | c4e7019 | 2009-09-11 04:59:25 +0000 | [diff] [blame] | 6725 | } |
| 6726 | |
John McCall | 77bb1aa | 2010-05-01 00:40:08 +0000 | [diff] [blame] | 6727 | if (RequireCompleteDeclContext(SS, DC)) |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6728 | return 0; |
Douglas Gregor | 3f5b61c | 2009-05-14 00:28:11 +0000 | [diff] [blame] | 6729 | |
Douglas Gregor | 1931b44 | 2009-02-03 00:34:39 +0000 | [diff] [blame] | 6730 | SearchDC = DC; |
Argyrios Kyrtzidis | 0f84a23 | 2008-11-09 22:53:32 +0000 | [diff] [blame] | 6731 | // Look-up name inside 'foo::'. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6732 | LookupQualifiedName(Previous, DC); |
John McCall | 6e24726 | 2009-10-10 05:48:19 +0000 | [diff] [blame] | 6733 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6734 | if (Previous.isAmbiguous()) |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6735 | return 0; |
John McCall | 6e24726 | 2009-10-10 05:48:19 +0000 | [diff] [blame] | 6736 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6737 | if (Previous.empty()) { |
Douglas Gregor | 9edad9b | 2010-01-14 17:47:39 +0000 | [diff] [blame] | 6738 | // Name lookup did not find anything. However, if the |
| 6739 | // nested-name-specifier refers to the current instantiation, |
| 6740 | // and that current instantiation has any dependent base |
| 6741 | // classes, we might find something at instantiation time: treat |
| 6742 | // this as a dependent elaborated-type-specifier. |
John McCall | 9a34edb | 2010-10-19 01:40:49 +0000 | [diff] [blame] | 6743 | // But this only makes any sense for reference-like lookups. |
| 6744 | if (Previous.wasNotFoundInCurrentInstantiation() && |
| 6745 | (TUK == TUK_Reference || TUK == TUK_Friend)) { |
Douglas Gregor | 9edad9b | 2010-01-14 17:47:39 +0000 | [diff] [blame] | 6746 | IsDependent = true; |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6747 | return 0; |
Douglas Gregor | 9edad9b | 2010-01-14 17:47:39 +0000 | [diff] [blame] | 6748 | } |
| 6749 | |
| 6750 | // A tag 'foo::bar' must already exist. |
Douglas Gregor | 1eabb7d | 2010-03-31 23:17:41 +0000 | [diff] [blame] | 6751 | Diag(NameLoc, diag::err_not_tag_in_scope) |
| 6752 | << Kind << Name << DC << SS.getRange(); |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 6753 | Name = 0; |
Douglas Gregor | d0c8737 | 2009-05-27 17:30:49 +0000 | [diff] [blame] | 6754 | Invalid = true; |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 6755 | goto CreateNewDecl; |
| 6756 | } |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 6757 | } else if (Name) { |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 6758 | // If this is a named struct, check to see if there was a previous forward |
| 6759 | // declaration or definition. |
Douglas Gregor | 2a3009a | 2009-02-03 19:21:40 +0000 | [diff] [blame] | 6760 | // FIXME: We're looking into outer scopes here, even when we |
| 6761 | // shouldn't be. Doing so can result in ambiguities that we |
| 6762 | // shouldn't be diagnosing. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6763 | LookupName(Previous, S); |
| 6764 | |
Douglas Gregor | 61c6c44 | 2011-05-04 00:25:33 +0000 | [diff] [blame] | 6765 | if (Previous.isAmbiguous() && TUK == TUK_Definition) { |
| 6766 | LookupResult::Filter F = Previous.makeFilter(); |
| 6767 | while (F.hasNext()) { |
| 6768 | NamedDecl *ND = F.next(); |
| 6769 | if (ND->getDeclContext()->getRedeclContext() != SearchDC) |
| 6770 | F.erase(); |
| 6771 | } |
| 6772 | F.done(); |
| 6773 | |
| 6774 | if (Previous.isAmbiguous()) |
| 6775 | return 0; |
| 6776 | } |
| 6777 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6778 | // Note: there used to be some attempt at recovery here. |
| 6779 | if (Previous.isAmbiguous()) |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6780 | return 0; |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 6781 | |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 6782 | if (!getLangOptions().CPlusPlus && TUK != TUK_Reference) { |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 6783 | // FIXME: This makes sure that we ignore the contexts associated |
| 6784 | // with C structs, unions, and enums when looking for a matching |
| 6785 | // tag declaration or definition. See the similar lookup tweak |
Douglas Gregor | 4c921ae | 2009-01-30 01:04:22 +0000 | [diff] [blame] | 6786 | // in Sema::LookupName; is there a better way to deal with this? |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 6787 | while (isa<RecordDecl>(SearchDC) || isa<EnumDecl>(SearchDC)) |
| 6788 | SearchDC = SearchDC->getParent(); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 6789 | } |
Douglas Gregor | 069ea64 | 2010-09-16 23:58:57 +0000 | [diff] [blame] | 6790 | } else if (S->isFunctionPrototypeScope()) { |
| 6791 | // If this is an enum declaration in function prototype scope, set its |
| 6792 | // initial context to the translation unit. |
| 6793 | SearchDC = Context.getTranslationUnitDecl(); |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 6794 | } |
| 6795 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6796 | if (Previous.isSingleResult() && |
| 6797 | Previous.getFoundDecl()->isTemplateParameter()) { |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 6798 | // Maybe we will complain about the shadowed template parameter. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6799 | DiagnoseTemplateParameterShadow(NameLoc, Previous.getFoundDecl()); |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 6800 | // Just pretend that we didn't see the previous declaration. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6801 | Previous.clear(); |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 6802 | } |
| 6803 | |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 6804 | if (getLangOptions().CPlusPlus && Name && DC && StdNamespace && |
Argyrios Kyrtzidis | 76c38d3 | 2010-08-02 07:14:54 +0000 | [diff] [blame] | 6805 | DC->Equals(getStdNamespace()) && Name->isStr("bad_alloc")) { |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 6806 | // This is a declaration of or a reference to "std::bad_alloc". |
| 6807 | isStdBadAlloc = true; |
| 6808 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6809 | if (Previous.empty() && StdBadAlloc) { |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 6810 | // std::bad_alloc has been implicitly declared (but made invisible to |
| 6811 | // name lookup). Fill in this implicit declaration as the previous |
| 6812 | // declaration, so that the declarations get chained appropriately. |
Argyrios Kyrtzidis | 76c38d3 | 2010-08-02 07:14:54 +0000 | [diff] [blame] | 6813 | Previous.addDecl(getStdBadAlloc()); |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 6814 | } |
| 6815 | } |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6816 | |
John McCall | 9c86b51 | 2010-03-25 21:28:06 +0000 | [diff] [blame] | 6817 | // If we didn't find a previous declaration, and this is a reference |
| 6818 | // (or friend reference), move to the correct scope. In C++, we |
| 6819 | // also need to do a redeclaration lookup there, just in case |
| 6820 | // there's a shadow friend decl. |
| 6821 | if (Name && Previous.empty() && |
| 6822 | (TUK == TUK_Reference || TUK == TUK_Friend)) { |
| 6823 | if (Invalid) goto CreateNewDecl; |
| 6824 | assert(SS.isEmpty()); |
| 6825 | |
| 6826 | if (TUK == TUK_Reference) { |
| 6827 | // C++ [basic.scope.pdecl]p5: |
| 6828 | // -- for an elaborated-type-specifier of the form |
| 6829 | // |
| 6830 | // class-key identifier |
| 6831 | // |
| 6832 | // if the elaborated-type-specifier is used in the |
| 6833 | // decl-specifier-seq or parameter-declaration-clause of a |
| 6834 | // function defined in namespace scope, the identifier is |
| 6835 | // declared as a class-name in the namespace that contains |
| 6836 | // the declaration; otherwise, except as a friend |
| 6837 | // declaration, the identifier is declared in the smallest |
| 6838 | // non-class, non-function-prototype scope that contains the |
| 6839 | // declaration. |
| 6840 | // |
| 6841 | // C99 6.7.2.3p8 has a similar (but not identical!) provision for |
| 6842 | // C structs and unions. |
| 6843 | // |
| 6844 | // It is an error in C++ to declare (rather than define) an enum |
| 6845 | // type, including via an elaborated type specifier. We'll |
| 6846 | // diagnose that later; for now, declare the enum in the same |
| 6847 | // scope as we would have picked for any other tag type. |
| 6848 | // |
| 6849 | // GNU C also supports this behavior as part of its incomplete |
| 6850 | // enum types extension, while GNU C++ does not. |
| 6851 | // |
| 6852 | // Find the context where we'll be declaring the tag. |
| 6853 | // FIXME: We would like to maintain the current DeclContext as the |
| 6854 | // lexical context, |
Rafael Espindola | 706df2f | 2011-01-20 02:26:24 +0000 | [diff] [blame] | 6855 | while (SearchDC->isRecord() || SearchDC->isTransparentContext()) |
John McCall | 9c86b51 | 2010-03-25 21:28:06 +0000 | [diff] [blame] | 6856 | SearchDC = SearchDC->getParent(); |
| 6857 | |
| 6858 | // Find the scope where we'll be declaring the tag. |
| 6859 | while (S->isClassScope() || |
| 6860 | (getLangOptions().CPlusPlus && |
| 6861 | S->isFunctionPrototypeScope()) || |
| 6862 | ((S->getFlags() & Scope::DeclScope) == 0) || |
| 6863 | (S->getEntity() && |
| 6864 | ((DeclContext *)S->getEntity())->isTransparentContext())) |
| 6865 | S = S->getParent(); |
| 6866 | } else { |
| 6867 | assert(TUK == TUK_Friend); |
| 6868 | // C++ [namespace.memdef]p3: |
| 6869 | // If a friend declaration in a non-local class first declares a |
| 6870 | // class or function, the friend class or function is a member of |
| 6871 | // the innermost enclosing namespace. |
| 6872 | SearchDC = SearchDC->getEnclosingNamespaceContext(); |
John McCall | 9c86b51 | 2010-03-25 21:28:06 +0000 | [diff] [blame] | 6873 | } |
| 6874 | |
John McCall | 0d6b164 | 2010-04-23 18:46:30 +0000 | [diff] [blame] | 6875 | // In C++, we need to do a redeclaration lookup to properly |
| 6876 | // diagnose some problems. |
John McCall | 9c86b51 | 2010-03-25 21:28:06 +0000 | [diff] [blame] | 6877 | if (getLangOptions().CPlusPlus) { |
| 6878 | Previous.setRedeclarationKind(ForRedeclaration); |
| 6879 | LookupQualifiedName(Previous, SearchDC); |
| 6880 | } |
| 6881 | } |
| 6882 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6883 | if (!Previous.empty()) { |
Douglas Gregor | 57265e3 | 2010-04-12 16:00:01 +0000 | [diff] [blame] | 6884 | NamedDecl *PrevDecl = (*Previous.begin())->getUnderlyingDecl(); |
John McCall | 0d6b164 | 2010-04-23 18:46:30 +0000 | [diff] [blame] | 6885 | |
| 6886 | // It's okay to have a tag decl in the same scope as a typedef |
| 6887 | // which hides a tag decl in the same scope. Finding this |
| 6888 | // insanity with a redeclaration lookup can only actually happen |
| 6889 | // in C++. |
| 6890 | // |
| 6891 | // This is also okay for elaborated-type-specifiers, which is |
| 6892 | // technically forbidden by the current standard but which is |
| 6893 | // okay according to the likely resolution of an open issue; |
| 6894 | // see http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#407 |
| 6895 | if (getLangOptions().CPlusPlus) { |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 6896 | if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(PrevDecl)) { |
John McCall | 0d6b164 | 2010-04-23 18:46:30 +0000 | [diff] [blame] | 6897 | if (const TagType *TT = TD->getUnderlyingType()->getAs<TagType>()) { |
| 6898 | TagDecl *Tag = TT->getDecl(); |
| 6899 | if (Tag->getDeclName() == Name && |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 6900 | Tag->getDeclContext()->getRedeclContext() |
| 6901 | ->Equals(TD->getDeclContext()->getRedeclContext())) { |
John McCall | 0d6b164 | 2010-04-23 18:46:30 +0000 | [diff] [blame] | 6902 | PrevDecl = Tag; |
| 6903 | Previous.clear(); |
| 6904 | Previous.addDecl(Tag); |
Douglas Gregor | 757c600 | 2010-08-27 22:55:10 +0000 | [diff] [blame] | 6905 | Previous.resolveKind(); |
John McCall | 0d6b164 | 2010-04-23 18:46:30 +0000 | [diff] [blame] | 6906 | } |
| 6907 | } |
| 6908 | } |
| 6909 | } |
| 6910 | |
Argyrios Kyrtzidis | 2d1c5d3 | 2008-04-27 13:50:30 +0000 | [diff] [blame] | 6911 | if (TagDecl *PrevTagDecl = dyn_cast<TagDecl>(PrevDecl)) { |
Chris Lattner | 14943b9 | 2008-07-03 03:30:58 +0000 | [diff] [blame] | 6912 | // If this is a use of a previous tag, or if the tag is already declared |
| 6913 | // in the same scope (so that the definition/declaration completes or |
Argyrios Kyrtzidis | 2d1c5d3 | 2008-04-27 13:50:30 +0000 | [diff] [blame] | 6914 | // rementions the tag), reuse the decl. |
John McCall | 67d1a67 | 2009-08-06 02:15:43 +0000 | [diff] [blame] | 6915 | if (TUK == TUK_Reference || TUK == TUK_Friend || |
Douglas Gregor | cc20945 | 2011-03-07 16:54:27 +0000 | [diff] [blame] | 6916 | isDeclInScope(PrevDecl, SearchDC, S, isExplicitSpecialization)) { |
Chris Lattner | 14943b9 | 2008-07-03 03:30:58 +0000 | [diff] [blame] | 6917 | // Make sure that this wasn't declared as an enum and now used as a |
| 6918 | // struct or something similar. |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 6919 | if (!isAcceptableTagRedeclaration(PrevTagDecl, Kind, KWLoc, *Name)) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6920 | bool SafeToContinue |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 6921 | = (PrevTagDecl->getTagKind() != TTK_Enum && |
| 6922 | Kind != TTK_Enum); |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 6923 | if (SafeToContinue) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6924 | Diag(KWLoc, diag::err_use_with_wrong_tag) |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 6925 | << Name |
Douglas Gregor | 849b243 | 2010-03-31 17:46:05 +0000 | [diff] [blame] | 6926 | << FixItHint::CreateReplacement(SourceRange(KWLoc), |
| 6927 | PrevTagDecl->getKindName()); |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 6928 | else |
| 6929 | Diag(KWLoc, diag::err_use_with_wrong_tag) << Name; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6930 | Diag(PrevTagDecl->getLocation(), diag::note_previous_use); |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 6931 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6932 | if (SafeToContinue) |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 6933 | Kind = PrevTagDecl->getTagKind(); |
| 6934 | else { |
| 6935 | // Recover by making this an anonymous redefinition. |
| 6936 | Name = 0; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6937 | Previous.clear(); |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 6938 | Invalid = true; |
| 6939 | } |
| 6940 | } |
| 6941 | |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 6942 | if (Kind == TTK_Enum && PrevTagDecl->getTagKind() == TTK_Enum) { |
| 6943 | const EnumDecl *PrevEnum = cast<EnumDecl>(PrevTagDecl); |
| 6944 | |
| 6945 | // All conflicts with previous declarations are recovered by |
| 6946 | // returning the previous declaration. |
| 6947 | if (ScopedEnum != PrevEnum->isScoped()) { |
| 6948 | Diag(KWLoc, diag::err_enum_redeclare_scoped_mismatch) |
| 6949 | << PrevEnum->isScoped(); |
| 6950 | Diag(PrevTagDecl->getLocation(), diag::note_previous_use); |
| 6951 | return PrevTagDecl; |
| 6952 | } |
| 6953 | else if (EnumUnderlying && PrevEnum->isFixed()) { |
| 6954 | QualType T; |
| 6955 | if (TypeSourceInfo *TI = EnumUnderlying.dyn_cast<TypeSourceInfo*>()) |
| 6956 | T = TI->getType(); |
| 6957 | else |
| 6958 | T = QualType(EnumUnderlying.get<const Type*>(), 0); |
| 6959 | |
| 6960 | if (!Context.hasSameUnqualifiedType(T, PrevEnum->getIntegerType())) { |
Douglas Gregor | d11617f | 2010-12-01 16:10:38 +0000 | [diff] [blame] | 6961 | Diag(NameLoc.isValid() ? NameLoc : KWLoc, |
| 6962 | diag::err_enum_redeclare_type_mismatch) |
| 6963 | << T |
| 6964 | << PrevEnum->getIntegerType(); |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 6965 | Diag(PrevTagDecl->getLocation(), diag::note_previous_use); |
| 6966 | return PrevTagDecl; |
| 6967 | } |
| 6968 | } |
| 6969 | else if (!EnumUnderlying.isNull() != PrevEnum->isFixed()) { |
| 6970 | Diag(KWLoc, diag::err_enum_redeclare_fixed_mismatch) |
| 6971 | << PrevEnum->isFixed(); |
| 6972 | Diag(PrevTagDecl->getLocation(), diag::note_previous_use); |
| 6973 | return PrevTagDecl; |
| 6974 | } |
| 6975 | } |
| 6976 | |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 6977 | if (!Invalid) { |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6978 | // If this is a use, just return the declaration we found. |
Chris Lattner | 14943b9 | 2008-07-03 03:30:58 +0000 | [diff] [blame] | 6979 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6980 | // FIXME: In the future, return a variant or some other clue |
| 6981 | // for the consumer of this Decl to know it doesn't own it. |
| 6982 | // For our current ASTs this shouldn't be a problem, but will |
| 6983 | // need to be changed with DeclGroups. |
Douglas Gregor | e1aa9f3 | 2010-06-08 21:27:36 +0000 | [diff] [blame] | 6984 | if ((TUK == TUK_Reference && !PrevTagDecl->getFriendObjectKind()) || |
| 6985 | TUK == TUK_Friend) |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6986 | return PrevTagDecl; |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 6987 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6988 | // Diagnose attempts to redefine a tag. |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 6989 | if (TUK == TUK_Definition) { |
Douglas Gregor | 952b017 | 2010-02-11 01:04:33 +0000 | [diff] [blame] | 6990 | if (TagDecl *Def = PrevTagDecl->getDefinition()) { |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 6991 | // If we're defining a specialization and the previous definition |
| 6992 | // is from an implicit instantiation, don't emit an error |
| 6993 | // here; we'll catch this in the general case below. |
| 6994 | if (!isExplicitSpecialization || |
| 6995 | !isa<CXXRecordDecl>(Def) || |
| 6996 | cast<CXXRecordDecl>(Def)->getTemplateSpecializationKind() |
| 6997 | == TSK_ExplicitSpecialization) { |
| 6998 | Diag(NameLoc, diag::err_redefinition) << Name; |
| 6999 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 7000 | // If this is a redefinition, recover by making this |
| 7001 | // struct be anonymous, which will make any later |
| 7002 | // references get the previous definition. |
| 7003 | Name = 0; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 7004 | Previous.clear(); |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 7005 | Invalid = true; |
| 7006 | } |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 7007 | } else { |
| 7008 | // If the type is currently being defined, complain |
| 7009 | // about a nested redefinition. |
John McCall | f4c7371 | 2011-01-19 06:33:43 +0000 | [diff] [blame] | 7010 | const TagType *Tag |
| 7011 | = cast<TagType>(Context.getTagDeclType(PrevTagDecl)); |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 7012 | if (Tag->isBeingDefined()) { |
| 7013 | Diag(NameLoc, diag::err_nested_redefinition) << Name; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7014 | Diag(PrevTagDecl->getLocation(), |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 7015 | diag::note_previous_definition); |
| 7016 | Name = 0; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 7017 | Previous.clear(); |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 7018 | Invalid = true; |
| 7019 | } |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 7020 | } |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 7021 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 7022 | // Okay, this is definition of a previously declared or referenced |
| 7023 | // tag PrevDecl. We're going to create a new Decl for it. |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 7024 | } |
Argyrios Kyrtzidis | 2d1c5d3 | 2008-04-27 13:50:30 +0000 | [diff] [blame] | 7025 | } |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 7026 | // If we get here we have (another) forward declaration or we |
John McCall | 67d1a67 | 2009-08-06 02:15:43 +0000 | [diff] [blame] | 7027 | // have a definition. Just create a new decl. |
| 7028 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 7029 | } else { |
| 7030 | // If we get here, this is a definition of a new tag type in a nested |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7031 | // scope, e.g. "struct foo; void bar() { struct foo; }", just create a |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 7032 | // new decl/type. We set PrevDecl to NULL so that the entities |
| 7033 | // have distinct types. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 7034 | Previous.clear(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7035 | } |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 7036 | // If we get here, we're going to create a new Decl. If PrevDecl |
| 7037 | // is non-NULL, it's a definition of the tag declared by |
| 7038 | // PrevDecl. If it's NULL, we have a new definition. |
John McCall | 0d6b164 | 2010-04-23 18:46:30 +0000 | [diff] [blame] | 7039 | |
| 7040 | |
| 7041 | // Otherwise, PrevDecl is not a tag, but was found with tag |
| 7042 | // lookup. This is only actually possible in C++, where a few |
| 7043 | // things like templates still live in the tag namespace. |
Argyrios Kyrtzidis | 2d1c5d3 | 2008-04-27 13:50:30 +0000 | [diff] [blame] | 7044 | } else { |
John McCall | 0d6b164 | 2010-04-23 18:46:30 +0000 | [diff] [blame] | 7045 | assert(getLangOptions().CPlusPlus); |
| 7046 | |
| 7047 | // Use a better diagnostic if an elaborated-type-specifier |
| 7048 | // found the wrong kind of type on the first |
| 7049 | // (non-redeclaration) lookup. |
| 7050 | if ((TUK == TUK_Reference || TUK == TUK_Friend) && |
| 7051 | !Previous.isForRedeclaration()) { |
| 7052 | unsigned Kind = 0; |
| 7053 | if (isa<TypedefDecl>(PrevDecl)) Kind = 1; |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 7054 | else if (isa<TypeAliasDecl>(PrevDecl)) Kind = 2; |
| 7055 | else if (isa<ClassTemplateDecl>(PrevDecl)) Kind = 3; |
John McCall | 0d6b164 | 2010-04-23 18:46:30 +0000 | [diff] [blame] | 7056 | Diag(NameLoc, diag::err_tag_reference_non_tag) << Kind; |
| 7057 | Diag(PrevDecl->getLocation(), diag::note_declared_at); |
| 7058 | Invalid = true; |
| 7059 | |
| 7060 | // Otherwise, only diagnose if the declaration is in scope. |
Douglas Gregor | cc20945 | 2011-03-07 16:54:27 +0000 | [diff] [blame] | 7061 | } else if (!isDeclInScope(PrevDecl, SearchDC, S, |
| 7062 | isExplicitSpecialization)) { |
John McCall | 0d6b164 | 2010-04-23 18:46:30 +0000 | [diff] [blame] | 7063 | // do nothing |
| 7064 | |
| 7065 | // Diagnose implicit declarations introduced by elaborated types. |
| 7066 | } else if (TUK == TUK_Reference || TUK == TUK_Friend) { |
| 7067 | unsigned Kind = 0; |
| 7068 | if (isa<TypedefDecl>(PrevDecl)) Kind = 1; |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 7069 | else if (isa<TypeAliasDecl>(PrevDecl)) Kind = 2; |
| 7070 | else if (isa<ClassTemplateDecl>(PrevDecl)) Kind = 3; |
John McCall | 0d6b164 | 2010-04-23 18:46:30 +0000 | [diff] [blame] | 7071 | Diag(NameLoc, diag::err_tag_reference_conflict) << Kind; |
| 7072 | Diag(PrevDecl->getLocation(), diag::note_previous_decl) << PrevDecl; |
| 7073 | Invalid = true; |
| 7074 | |
| 7075 | // Otherwise it's a declaration. Call out a particularly common |
| 7076 | // case here. |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 7077 | } else if (TypedefNameDecl *TND = dyn_cast<TypedefNameDecl>(PrevDecl)) { |
| 7078 | unsigned Kind = 0; |
| 7079 | if (isa<TypeAliasDecl>(PrevDecl)) Kind = 1; |
John McCall | 0d6b164 | 2010-04-23 18:46:30 +0000 | [diff] [blame] | 7080 | Diag(NameLoc, diag::err_tag_definition_of_typedef) |
Richard Smith | 162e1c1 | 2011-04-15 14:24:37 +0000 | [diff] [blame] | 7081 | << Name << Kind << TND->getUnderlyingType(); |
John McCall | 0d6b164 | 2010-04-23 18:46:30 +0000 | [diff] [blame] | 7082 | Diag(PrevDecl->getLocation(), diag::note_previous_decl) << PrevDecl; |
| 7083 | Invalid = true; |
| 7084 | |
| 7085 | // Otherwise, diagnose. |
| 7086 | } else { |
| 7087 | // The tag name clashes with something else in the target scope, |
| 7088 | // issue an error and recover by making this tag be anonymous. |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 7089 | Diag(NameLoc, diag::err_redefinition_different_kind) << Name; |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 7090 | Diag(PrevDecl->getLocation(), diag::note_previous_definition); |
Argyrios Kyrtzidis | b02ef24 | 2008-07-16 07:45:46 +0000 | [diff] [blame] | 7091 | Name = 0; |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 7092 | Invalid = true; |
Argyrios Kyrtzidis | b02ef24 | 2008-07-16 07:45:46 +0000 | [diff] [blame] | 7093 | } |
John McCall | 0d6b164 | 2010-04-23 18:46:30 +0000 | [diff] [blame] | 7094 | |
| 7095 | // The existing declaration isn't relevant to us; we're in a |
| 7096 | // new scope, so clear out the previous declaration. |
| 7097 | Previous.clear(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7098 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7099 | } |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 7100 | |
Chris Lattner | cc98eac | 2008-12-17 07:13:27 +0000 | [diff] [blame] | 7101 | CreateNewDecl: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7102 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 7103 | TagDecl *PrevDecl = 0; |
| 7104 | if (Previous.isSingleResult()) |
| 7105 | PrevDecl = cast<TagDecl>(Previous.getFoundDecl()); |
| 7106 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7107 | // If there is an identifier, use the location of the identifier as the |
| 7108 | // location of the decl, otherwise use the location of the struct/union |
| 7109 | // keyword. |
| 7110 | SourceLocation Loc = NameLoc.isValid() ? NameLoc : KWLoc; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7111 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 7112 | // Otherwise, create a new declaration. If there is a previous |
| 7113 | // declaration of the same entity, the two will be linked via |
| 7114 | // PrevDecl. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7115 | TagDecl *New; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 7116 | |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 7117 | bool IsForwardReference = false; |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 7118 | if (Kind == TTK_Enum) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7119 | // FIXME: Tag decls should be chained to any simultaneous vardecls, e.g.: |
| 7120 | // enum X { A, B, C } D; D should chain to X. |
Abramo Bagnara | ba877ad | 2011-03-09 14:09:51 +0000 | [diff] [blame] | 7121 | New = EnumDecl::Create(Context, SearchDC, KWLoc, Loc, Name, |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 7122 | cast_or_null<EnumDecl>(PrevDecl), ScopedEnum, |
Abramo Bagnara | a88cefd | 2010-12-03 18:54:17 +0000 | [diff] [blame] | 7123 | ScopedEnumUsesClassTag, !EnumUnderlying.isNull()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7124 | // If this is an undefined enum, warn. |
Douglas Gregor | f3a7b7c | 2010-06-22 14:26:35 +0000 | [diff] [blame] | 7125 | if (TUK != TUK_Definition && !Invalid) { |
| 7126 | TagDecl *Def; |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 7127 | if (getLangOptions().CPlusPlus0x && cast<EnumDecl>(New)->isFixed()) { |
| 7128 | // C++0x: 7.2p2: opaque-enum-declaration. |
| 7129 | // Conflicts are diagnosed above. Do nothing. |
| 7130 | } |
| 7131 | else if (PrevDecl && (Def = cast<EnumDecl>(PrevDecl)->getDefinition())) { |
Douglas Gregor | f3a7b7c | 2010-06-22 14:26:35 +0000 | [diff] [blame] | 7132 | Diag(Loc, diag::ext_forward_ref_enum_def) |
| 7133 | << New; |
| 7134 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 7135 | } else { |
Francois Pichet | 8dc3abc | 2010-09-12 05:06:55 +0000 | [diff] [blame] | 7136 | unsigned DiagID = diag::ext_forward_ref_enum; |
| 7137 | if (getLangOptions().Microsoft) |
| 7138 | DiagID = diag::ext_ms_forward_ref_enum; |
| 7139 | else if (getLangOptions().CPlusPlus) |
| 7140 | DiagID = diag::err_forward_ref_enum; |
| 7141 | Diag(Loc, DiagID); |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 7142 | |
| 7143 | // If this is a forward-declared reference to an enumeration, make a |
| 7144 | // note of it; we won't actually be introducing the declaration into |
| 7145 | // the declaration context. |
| 7146 | if (TUK == TUK_Reference) |
| 7147 | IsForwardReference = true; |
Douglas Gregor | f3a7b7c | 2010-06-22 14:26:35 +0000 | [diff] [blame] | 7148 | } |
Douglas Gregor | 80711a2 | 2009-03-06 18:34:03 +0000 | [diff] [blame] | 7149 | } |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 7150 | |
| 7151 | if (EnumUnderlying) { |
| 7152 | EnumDecl *ED = cast<EnumDecl>(New); |
| 7153 | if (TypeSourceInfo *TI = EnumUnderlying.dyn_cast<TypeSourceInfo*>()) |
| 7154 | ED->setIntegerTypeSourceInfo(TI); |
| 7155 | else |
| 7156 | ED->setIntegerType(QualType(EnumUnderlying.get<const Type*>(), 0)); |
| 7157 | ED->setPromotionType(ED->getIntegerType()); |
| 7158 | } |
| 7159 | |
Argyrios Kyrtzidis | 39ba4ae | 2008-06-09 23:19:58 +0000 | [diff] [blame] | 7160 | } else { |
| 7161 | // struct/union/class |
| 7162 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7163 | // FIXME: Tag decls should be chained to any simultaneous vardecls, e.g.: |
| 7164 | // struct X { int A; } D; D should chain to X. |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 7165 | if (getLangOptions().CPlusPlus) { |
Ted Kremenek | 2b345eb | 2008-09-05 17:39:33 +0000 | [diff] [blame] | 7166 | // FIXME: Look for a way to use RecordDecl for simple structs. |
Abramo Bagnara | ba877ad | 2011-03-09 14:09:51 +0000 | [diff] [blame] | 7167 | New = CXXRecordDecl::Create(Context, Kind, SearchDC, KWLoc, Loc, Name, |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 7168 | cast_or_null<CXXRecordDecl>(PrevDecl)); |
Abramo Bagnara | ba877ad | 2011-03-09 14:09:51 +0000 | [diff] [blame] | 7169 | |
Argyrios Kyrtzidis | 76c38d3 | 2010-08-02 07:14:54 +0000 | [diff] [blame] | 7170 | if (isStdBadAlloc && (!StdBadAlloc || getStdBadAlloc()->isImplicit())) |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 7171 | StdBadAlloc = cast<CXXRecordDecl>(New); |
| 7172 | } else |
Abramo Bagnara | ba877ad | 2011-03-09 14:09:51 +0000 | [diff] [blame] | 7173 | New = RecordDecl::Create(Context, Kind, SearchDC, KWLoc, Loc, Name, |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 7174 | cast_or_null<RecordDecl>(PrevDecl)); |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 7175 | } |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 7176 | |
John McCall | b621766 | 2010-03-15 10:12:16 +0000 | [diff] [blame] | 7177 | // Maybe add qualifier info. |
| 7178 | if (SS.isNotEmpty()) { |
Fariborz Jahanian | 4fb2053 | 2010-05-14 21:35:02 +0000 | [diff] [blame] | 7179 | if (SS.isSet()) { |
Douglas Gregor | c22b5ff | 2011-02-25 02:25:35 +0000 | [diff] [blame] | 7180 | New->setQualifierInfo(SS.getWithLocInContext(Context)); |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 7181 | if (TemplateParameterLists.size() > 0) { |
Douglas Gregor | c722ea4 | 2010-06-15 17:44:38 +0000 | [diff] [blame] | 7182 | New->setTemplateParameterListsInfo(Context, |
Abramo Bagnara | 7f0a915 | 2011-03-18 15:16:37 +0000 | [diff] [blame] | 7183 | TemplateParameterLists.size(), |
Abramo Bagnara | 9b93488 | 2010-06-12 08:15:14 +0000 | [diff] [blame] | 7184 | (TemplateParameterList**) TemplateParameterLists.release()); |
| 7185 | } |
Fariborz Jahanian | 4fb2053 | 2010-05-14 21:35:02 +0000 | [diff] [blame] | 7186 | } |
| 7187 | else |
| 7188 | Invalid = true; |
John McCall | b621766 | 2010-03-15 10:12:16 +0000 | [diff] [blame] | 7189 | } |
| 7190 | |
Daniel Dunbar | 9f21f89 | 2010-05-27 01:53:40 +0000 | [diff] [blame] | 7191 | if (RecordDecl *RD = dyn_cast<RecordDecl>(New)) { |
| 7192 | // Add alignment attributes if necessary; these attributes are checked when |
| 7193 | // the ASTContext lays out the structure. |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 7194 | // |
| 7195 | // It is important for implementing the correct semantics that this |
| 7196 | // happen here (in act on tag decl). The #pragma pack stack is |
| 7197 | // maintained as a result of parser callbacks which can occur at |
| 7198 | // many points during the parsing of a struct declaration (because |
| 7199 | // the #pragma tokens are effectively skipped over during the |
| 7200 | // parsing of the struct). |
Daniel Dunbar | 9f21f89 | 2010-05-27 01:53:40 +0000 | [diff] [blame] | 7201 | AddAlignmentAttributesForRecord(RD); |
Fariborz Jahanian | c1a0a73 | 2011-04-26 17:54:40 +0000 | [diff] [blame] | 7202 | |
| 7203 | AddMsStructLayoutForRecord(RD); |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 7204 | } |
| 7205 | |
Douglas Gregor | f6b1185 | 2009-10-08 15:14:33 +0000 | [diff] [blame] | 7206 | // If this is a specialization of a member class (of a class template), |
| 7207 | // check the specialization. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 7208 | if (isExplicitSpecialization && CheckMemberSpecialization(New, Previous)) |
Douglas Gregor | f6b1185 | 2009-10-08 15:14:33 +0000 | [diff] [blame] | 7209 | Invalid = true; |
Daniel Dunbar | 9f21f89 | 2010-05-27 01:53:40 +0000 | [diff] [blame] | 7210 | |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 7211 | if (Invalid) |
| 7212 | New->setInvalidDecl(); |
| 7213 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 7214 | if (Attr) |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 7215 | ProcessDeclAttributeList(S, New, Attr); |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 7216 | |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 7217 | // If we're declaring or defining a tag in function prototype scope |
| 7218 | // in C, note that this type can only be used within the function. |
Douglas Gregor | 3218c4b | 2009-01-09 22:42:13 +0000 | [diff] [blame] | 7219 | if (Name && S->isFunctionPrototypeScope() && !getLangOptions().CPlusPlus) |
| 7220 | Diag(Loc, diag::warn_decl_in_param_list) << Context.getTagDeclType(New); |
| 7221 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 7222 | // Set the lexical context. If the tag has a C++ scope specifier, the |
| 7223 | // lexical context will be different from the semantic context. |
Douglas Gregor | 1931b44 | 2009-02-03 00:34:39 +0000 | [diff] [blame] | 7224 | New->setLexicalDeclContext(CurContext); |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 7225 | |
John McCall | 02cace7 | 2009-08-28 07:59:38 +0000 | [diff] [blame] | 7226 | // Mark this as a friend decl if applicable. |
| 7227 | if (TUK == TUK_Friend) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 7228 | New->setObjectOfFriendDecl(/* PreviouslyDeclared = */ !Previous.empty()); |
John McCall | 02cace7 | 2009-08-28 07:59:38 +0000 | [diff] [blame] | 7229 | |
Anders Carlsson | 0cf8830 | 2009-03-26 01:19:02 +0000 | [diff] [blame] | 7230 | // Set the access specifier. |
John McCall | 9c86b51 | 2010-03-25 21:28:06 +0000 | [diff] [blame] | 7231 | if (!Invalid && SearchDC->isRecord()) |
Douglas Gregor | d0c8737 | 2009-05-27 17:30:49 +0000 | [diff] [blame] | 7232 | SetMemberAccessSpecifier(New, PrevDecl, AS); |
Douglas Gregor | 06c0fec | 2009-03-25 22:00:53 +0000 | [diff] [blame] | 7233 | |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 7234 | if (TUK == TUK_Definition) |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 7235 | New->startDefinition(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7236 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7237 | // If this has an identifier, add it to the scope stack. |
John McCall | d7eff68 | 2009-09-02 00:55:30 +0000 | [diff] [blame] | 7238 | if (TUK == TUK_Friend) { |
John McCall | 82b9fb8 | 2009-09-02 19:32:14 +0000 | [diff] [blame] | 7239 | // We might be replacing an existing declaration in the lookup tables; |
| 7240 | // if so, borrow its access specifier. |
| 7241 | if (PrevDecl) |
| 7242 | New->setAccess(PrevDecl->getAccess()); |
| 7243 | |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 7244 | DeclContext *DC = New->getDeclContext()->getRedeclContext(); |
John McCall | 9c86b51 | 2010-03-25 21:28:06 +0000 | [diff] [blame] | 7245 | DC->makeDeclVisibleInContext(New, /* Recoverable = */ false); |
| 7246 | if (Name) // can be null along some error paths |
John McCall | d7eff68 | 2009-09-02 00:55:30 +0000 | [diff] [blame] | 7247 | if (Scope *EnclosingScope = getScopeForDeclContext(S, DC)) |
| 7248 | PushOnScopeChains(New, EnclosingScope, /* AddToContext = */ false); |
John McCall | d7eff68 | 2009-09-02 00:55:30 +0000 | [diff] [blame] | 7249 | } else if (Name) { |
Douglas Gregor | 1a0d31a | 2009-01-12 18:45:55 +0000 | [diff] [blame] | 7250 | S = getNonFieldDeclScope(S); |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 7251 | PushOnScopeChains(New, S, !IsForwardReference); |
| 7252 | if (IsForwardReference) |
| 7253 | SearchDC->makeDeclVisibleInContext(New, /* Recoverable = */ false); |
| 7254 | |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 7255 | } else { |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 7256 | CurContext->addDecl(New); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7257 | } |
Argyrios Kyrtzidis | 5239304 | 2008-11-09 23:41:00 +0000 | [diff] [blame] | 7258 | |
Douglas Gregor | c29f77b | 2009-07-07 16:35:42 +0000 | [diff] [blame] | 7259 | // If this is the C FILE type, notify the AST context. |
| 7260 | if (IdentifierInfo *II = New->getIdentifier()) |
| 7261 | if (!New->isInvalidDecl() && |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 7262 | New->getDeclContext()->getRedeclContext()->isTranslationUnit() && |
Douglas Gregor | c29f77b | 2009-07-07 16:35:42 +0000 | [diff] [blame] | 7263 | II->isStr("FILE")) |
| 7264 | Context.setFILEDecl(New); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7265 | |
Douglas Gregor | 402abb5 | 2009-05-28 23:31:59 +0000 | [diff] [blame] | 7266 | OwnedDecl = true; |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7267 | return New; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7268 | } |
| 7269 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7270 | void Sema::ActOnTagStartDefinition(Scope *S, Decl *TagD) { |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 7271 | AdjustDeclIfTemplate(TagD); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7272 | TagDecl *Tag = cast<TagDecl>(TagD); |
Douglas Gregor | 48c89f4 | 2010-04-24 16:38:41 +0000 | [diff] [blame] | 7273 | |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 7274 | // Enter the tag context. |
| 7275 | PushDeclContext(S, Tag); |
John McCall | f936815 | 2009-12-20 07:58:13 +0000 | [diff] [blame] | 7276 | } |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 7277 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7278 | void Sema::ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagD, |
Anders Carlsson | 2c3ee54 | 2011-03-25 14:31:08 +0000 | [diff] [blame] | 7279 | SourceLocation FinalLoc, |
John McCall | f936815 | 2009-12-20 07:58:13 +0000 | [diff] [blame] | 7280 | SourceLocation LBraceLoc) { |
| 7281 | AdjustDeclIfTemplate(TagD); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7282 | CXXRecordDecl *Record = cast<CXXRecordDecl>(TagD); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 7283 | |
John McCall | f936815 | 2009-12-20 07:58:13 +0000 | [diff] [blame] | 7284 | FieldCollector->StartClass(); |
| 7285 | |
| 7286 | if (!Record->getIdentifier()) |
| 7287 | return; |
| 7288 | |
Anders Carlsson | 2c3ee54 | 2011-03-25 14:31:08 +0000 | [diff] [blame] | 7289 | if (FinalLoc.isValid()) |
| 7290 | Record->addAttr(new (Context) FinalAttr(FinalLoc, Context)); |
Anders Carlsson | dfc2f10 | 2011-01-22 17:51:53 +0000 | [diff] [blame] | 7291 | |
John McCall | f936815 | 2009-12-20 07:58:13 +0000 | [diff] [blame] | 7292 | // C++ [class]p2: |
| 7293 | // [...] The class-name is also inserted into the scope of the |
| 7294 | // class itself; this is known as the injected-class-name. For |
| 7295 | // purposes of access checking, the injected-class-name is treated |
| 7296 | // as if it were a public member name. |
| 7297 | CXXRecordDecl *InjectedClassName |
Abramo Bagnara | ba877ad | 2011-03-09 14:09:51 +0000 | [diff] [blame] | 7298 | = CXXRecordDecl::Create(Context, Record->getTagKind(), CurContext, |
| 7299 | Record->getLocStart(), Record->getLocation(), |
John McCall | f936815 | 2009-12-20 07:58:13 +0000 | [diff] [blame] | 7300 | Record->getIdentifier(), |
Argyrios Kyrtzidis | 3b8f610 | 2010-10-14 20:14:21 +0000 | [diff] [blame] | 7301 | /*PrevDecl=*/0, |
| 7302 | /*DelayTypeCreation=*/true); |
| 7303 | Context.getTypeDeclType(InjectedClassName, Record); |
John McCall | f936815 | 2009-12-20 07:58:13 +0000 | [diff] [blame] | 7304 | InjectedClassName->setImplicit(); |
| 7305 | InjectedClassName->setAccess(AS_public); |
| 7306 | if (ClassTemplateDecl *Template = Record->getDescribedClassTemplate()) |
| 7307 | InjectedClassName->setDescribedClassTemplate(Template); |
| 7308 | PushOnScopeChains(InjectedClassName, S); |
| 7309 | assert(InjectedClassName->isInjectedClassName() && |
| 7310 | "Broken injected-class-name"); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 7311 | } |
| 7312 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7313 | void Sema::ActOnTagFinishDefinition(Scope *S, Decl *TagD, |
Argyrios Kyrtzidis | 07a5b28 | 2009-07-14 03:17:52 +0000 | [diff] [blame] | 7314 | SourceLocation RBraceLoc) { |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 7315 | AdjustDeclIfTemplate(TagD); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7316 | TagDecl *Tag = cast<TagDecl>(TagD); |
Argyrios Kyrtzidis | 07a5b28 | 2009-07-14 03:17:52 +0000 | [diff] [blame] | 7317 | Tag->setRBraceLoc(RBraceLoc); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 7318 | |
| 7319 | if (isa<CXXRecordDecl>(Tag)) |
| 7320 | FieldCollector->FinishClass(); |
| 7321 | |
| 7322 | // Exit this scope of this tag's definition. |
| 7323 | PopDeclContext(); |
Douglas Gregor | adda846 | 2010-01-06 17:00:51 +0000 | [diff] [blame] | 7324 | |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 7325 | // Notify the consumer that we've defined a tag. |
| 7326 | Consumer.HandleTagDeclDefinition(Tag); |
| 7327 | } |
Chris Lattner | 5a6ddbf | 2008-06-21 19:39:06 +0000 | [diff] [blame] | 7328 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7329 | void Sema::ActOnTagDefinitionError(Scope *S, Decl *TagD) { |
John McCall | db7bb4a | 2010-03-17 00:38:33 +0000 | [diff] [blame] | 7330 | AdjustDeclIfTemplate(TagD); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7331 | TagDecl *Tag = cast<TagDecl>(TagD); |
John McCall | db7bb4a | 2010-03-17 00:38:33 +0000 | [diff] [blame] | 7332 | Tag->setInvalidDecl(); |
| 7333 | |
John McCall | a8cab01 | 2010-03-17 19:25:57 +0000 | [diff] [blame] | 7334 | // We're undoing ActOnTagStartDefinition here, not |
| 7335 | // ActOnStartCXXMemberDeclarations, so we don't have to mess with |
| 7336 | // the FieldCollector. |
John McCall | db7bb4a | 2010-03-17 00:38:33 +0000 | [diff] [blame] | 7337 | |
| 7338 | PopDeclContext(); |
| 7339 | } |
| 7340 | |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 7341 | // Note that FieldName may be null for anonymous bitfields. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7342 | bool Sema::VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 7343 | QualType FieldTy, const Expr *BitWidth, |
| 7344 | bool *ZeroWidth) { |
| 7345 | // Default to true; that shouldn't confuse checks for emptiness |
| 7346 | if (ZeroWidth) |
| 7347 | *ZeroWidth = true; |
| 7348 | |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 7349 | // C99 6.7.2.1p4 - verify the field type. |
Chris Lattner | 8b963ef | 2009-03-05 23:01:03 +0000 | [diff] [blame] | 7350 | // C++ 9.6p3: A bit-field shall have integral or enumeration type. |
Douglas Gregor | 2ade35e | 2010-06-16 00:17:44 +0000 | [diff] [blame] | 7351 | if (!FieldTy->isDependentType() && !FieldTy->isIntegralOrEnumerationType()) { |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 7352 | // Handle incomplete types with specific error. |
Douglas Gregor | a03aca8 | 2009-03-10 21:58:27 +0000 | [diff] [blame] | 7353 | if (RequireCompleteType(FieldLoc, FieldTy, diag::err_field_incomplete)) |
| 7354 | return true; |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 7355 | if (FieldName) |
| 7356 | return Diag(FieldLoc, diag::err_not_integral_type_bitfield) |
| 7357 | << FieldName << FieldTy << BitWidth->getSourceRange(); |
| 7358 | return Diag(FieldLoc, diag::err_not_integral_type_anon_bitfield) |
| 7359 | << FieldTy << BitWidth->getSourceRange(); |
Douglas Gregor | e186269 | 2010-12-15 23:18:36 +0000 | [diff] [blame] | 7360 | } else if (DiagnoseUnexpandedParameterPack(const_cast<Expr *>(BitWidth), |
| 7361 | UPPC_BitFieldWidth)) |
| 7362 | return true; |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 7363 | |
| 7364 | // If the bit-width is type- or value-dependent, don't try to check |
| 7365 | // it now. |
| 7366 | if (BitWidth->isValueDependent() || BitWidth->isTypeDependent()) |
| 7367 | return false; |
| 7368 | |
Anders Carlsson | 9f1e572 | 2008-12-06 20:33:04 +0000 | [diff] [blame] | 7369 | llvm::APSInt Value; |
| 7370 | if (VerifyIntegerConstantExpression(BitWidth, &Value)) |
| 7371 | return true; |
| 7372 | |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 7373 | if (Value != 0 && ZeroWidth) |
| 7374 | *ZeroWidth = false; |
| 7375 | |
Chris Lattner | cd08707 | 2008-12-12 04:56:04 +0000 | [diff] [blame] | 7376 | // Zero-width bitfield is ok for anonymous field. |
| 7377 | if (Value == 0 && FieldName) |
| 7378 | return Diag(FieldLoc, diag::err_bitfield_has_zero_width) << FieldName; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7379 | |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 7380 | if (Value.isSigned() && Value.isNegative()) { |
| 7381 | if (FieldName) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7382 | return Diag(FieldLoc, diag::err_bitfield_has_negative_width) |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 7383 | << FieldName << Value.toString(10); |
| 7384 | return Diag(FieldLoc, diag::err_anon_bitfield_has_negative_width) |
| 7385 | << Value.toString(10); |
| 7386 | } |
Anders Carlsson | 9f1e572 | 2008-12-06 20:33:04 +0000 | [diff] [blame] | 7387 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 7388 | if (!FieldTy->isDependentType()) { |
| 7389 | uint64_t TypeSize = Context.getTypeSize(FieldTy); |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 7390 | if (Value.getZExtValue() > TypeSize) { |
Anders Carlsson | 72468ec | 2010-04-16 15:16:32 +0000 | [diff] [blame] | 7391 | if (!getLangOptions().CPlusPlus) { |
| 7392 | if (FieldName) |
| 7393 | return Diag(FieldLoc, diag::err_bitfield_width_exceeds_type_size) |
| 7394 | << FieldName << (unsigned)Value.getZExtValue() |
| 7395 | << (unsigned)TypeSize; |
| 7396 | |
| 7397 | return Diag(FieldLoc, diag::err_anon_bitfield_width_exceeds_type_size) |
| 7398 | << (unsigned)Value.getZExtValue() << (unsigned)TypeSize; |
| 7399 | } |
| 7400 | |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 7401 | if (FieldName) |
Anders Carlsson | 72468ec | 2010-04-16 15:16:32 +0000 | [diff] [blame] | 7402 | Diag(FieldLoc, diag::warn_bitfield_width_exceeds_type_size) |
| 7403 | << FieldName << (unsigned)Value.getZExtValue() |
| 7404 | << (unsigned)TypeSize; |
| 7405 | else |
| 7406 | Diag(FieldLoc, diag::warn_anon_bitfield_width_exceeds_type_size) |
| 7407 | << (unsigned)Value.getZExtValue() << (unsigned)TypeSize; |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 7408 | } |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 7409 | } |
Anders Carlsson | 9f1e572 | 2008-12-06 20:33:04 +0000 | [diff] [blame] | 7410 | |
| 7411 | return false; |
| 7412 | } |
| 7413 | |
Steve Naroff | 08d92e4 | 2007-09-15 18:49:24 +0000 | [diff] [blame] | 7414 | /// ActOnField - Each field of a struct/union/class is passed into this in order |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7415 | /// to create a FieldDecl object for it. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7416 | Decl *Sema::ActOnField(Scope *S, Decl *TagD, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7417 | SourceLocation DeclStart, |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 7418 | Declarator &D, ExprTy *BitfieldWidth) { |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7419 | FieldDecl *Res = HandleField(S, cast_or_null<RecordDecl>(TagD), |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 7420 | DeclStart, D, static_cast<Expr*>(BitfieldWidth), |
| 7421 | AS_public); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7422 | return Res; |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 7423 | } |
| 7424 | |
| 7425 | /// HandleField - Analyze a field of a C struct or a C++ data member. |
| 7426 | /// |
| 7427 | FieldDecl *Sema::HandleField(Scope *S, RecordDecl *Record, |
| 7428 | SourceLocation DeclStart, |
Douglas Gregor | 4dd55f5 | 2009-03-11 20:50:30 +0000 | [diff] [blame] | 7429 | Declarator &D, Expr *BitWidth, |
| 7430 | AccessSpecifier AS) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7431 | IdentifierInfo *II = D.getIdentifier(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7432 | SourceLocation Loc = DeclStart; |
| 7433 | if (II) Loc = D.getIdentifierLoc(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7434 | |
John McCall | bf1a028 | 2010-06-04 23:28:52 +0000 | [diff] [blame] | 7435 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); |
| 7436 | QualType T = TInfo->getType(); |
Douglas Gregor | e186269 | 2010-12-15 23:18:36 +0000 | [diff] [blame] | 7437 | if (getLangOptions().CPlusPlus) { |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 7438 | CheckExtraCXXDefaultArguments(D); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 7439 | |
Douglas Gregor | e186269 | 2010-12-15 23:18:36 +0000 | [diff] [blame] | 7440 | if (DiagnoseUnexpandedParameterPack(D.getIdentifierLoc(), TInfo, |
| 7441 | UPPC_DataMemberType)) { |
| 7442 | D.setInvalidType(); |
| 7443 | T = Context.IntTy; |
| 7444 | TInfo = Context.getTrivialTypeSourceInfo(T, Loc); |
| 7445 | } |
| 7446 | } |
| 7447 | |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 7448 | DiagnoseFunctionSpecifiers(D); |
| 7449 | |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 7450 | if (D.getDeclSpec().isThreadSpecified()) |
| 7451 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_invalid_thread); |
Douglas Gregor | 7f6ff02 | 2010-08-30 14:32:14 +0000 | [diff] [blame] | 7452 | |
| 7453 | // Check to see if this name was declared as a member previously |
| 7454 | LookupResult Previous(*this, II, Loc, LookupMemberName, ForRedeclaration); |
| 7455 | LookupName(Previous, S); |
| 7456 | assert((Previous.empty() || Previous.isOverloadedResult() || |
| 7457 | Previous.isSingleResult()) |
| 7458 | && "Lookup of member name should be either overloaded, single or null"); |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 7459 | |
Douglas Gregor | 7f6ff02 | 2010-08-30 14:32:14 +0000 | [diff] [blame] | 7460 | // If the name is overloaded then get any declaration else get the single result |
| 7461 | NamedDecl *PrevDecl = Previous.isOverloadedResult() ? |
| 7462 | Previous.getRepresentativeDecl() : Previous.getAsSingle<NamedDecl>(); |
Douglas Gregor | c19ee3e | 2009-06-17 23:37:01 +0000 | [diff] [blame] | 7463 | |
| 7464 | if (PrevDecl && PrevDecl->isTemplateParameter()) { |
| 7465 | // Maybe we will complain about the shadowed template parameter. |
| 7466 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl); |
| 7467 | // Just pretend that we didn't see the previous declaration. |
| 7468 | PrevDecl = 0; |
| 7469 | } |
| 7470 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 7471 | if (PrevDecl && !isDeclInScope(PrevDecl, Record, S)) |
| 7472 | PrevDecl = 0; |
| 7473 | |
Steve Naroff | ea218b8 | 2009-07-14 14:58:18 +0000 | [diff] [blame] | 7474 | bool Mutable |
| 7475 | = (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_mutable); |
| 7476 | SourceLocation TSSL = D.getSourceRange().getBegin(); |
| 7477 | FieldDecl *NewFD |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 7478 | = CheckFieldDecl(II, T, TInfo, Record, Loc, Mutable, BitWidth, TSSL, |
Steve Naroff | ea218b8 | 2009-07-14 14:58:18 +0000 | [diff] [blame] | 7479 | AS, PrevDecl, &D); |
Rafael Espindola | 0162070 | 2010-03-21 22:56:43 +0000 | [diff] [blame] | 7480 | |
| 7481 | if (NewFD->isInvalidDecl()) |
| 7482 | Record->setInvalidDecl(); |
| 7483 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 7484 | if (NewFD->isInvalidDecl() && PrevDecl) { |
| 7485 | // Don't introduce NewFD into scope; there's already something |
| 7486 | // with the same name in the same scope. |
| 7487 | } else if (II) { |
| 7488 | PushOnScopeChains(NewFD, S); |
| 7489 | } else |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 7490 | Record->addDecl(NewFD); |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 7491 | |
| 7492 | return NewFD; |
| 7493 | } |
| 7494 | |
| 7495 | /// \brief Build a new FieldDecl and check its well-formedness. |
| 7496 | /// |
| 7497 | /// This routine builds a new FieldDecl given the fields name, type, |
| 7498 | /// record, etc. \p PrevDecl should refer to any previous declaration |
| 7499 | /// with the same name and in the same scope as the field to be |
| 7500 | /// created. |
| 7501 | /// |
| 7502 | /// \returns a new FieldDecl. |
| 7503 | /// |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7504 | /// \todo The Declarator argument is a hack. It will be removed once |
Argyrios Kyrtzidis | a1d5662 | 2009-08-19 01:27:57 +0000 | [diff] [blame] | 7505 | FieldDecl *Sema::CheckFieldDecl(DeclarationName Name, QualType T, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 7506 | TypeSourceInfo *TInfo, |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 7507 | RecordDecl *Record, SourceLocation Loc, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7508 | bool Mutable, Expr *BitWidth, |
Steve Naroff | ea218b8 | 2009-07-14 14:58:18 +0000 | [diff] [blame] | 7509 | SourceLocation TSSL, |
Douglas Gregor | 4dd55f5 | 2009-03-11 20:50:30 +0000 | [diff] [blame] | 7510 | AccessSpecifier AS, NamedDecl *PrevDecl, |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 7511 | Declarator *D) { |
| 7512 | IdentifierInfo *II = Name.getAsIdentifierInfo(); |
Steve Naroff | 5912a35 | 2007-08-28 20:14:24 +0000 | [diff] [blame] | 7513 | bool InvalidDecl = false; |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 7514 | if (D) InvalidDecl = D->isInvalidType(); |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 7515 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 7516 | // If we receive a broken type, recover by assuming 'int' and |
| 7517 | // marking this declaration as invalid. |
| 7518 | if (T.isNull()) { |
| 7519 | InvalidDecl = true; |
| 7520 | T = Context.IntTy; |
| 7521 | } |
| 7522 | |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 7523 | QualType EltTy = Context.getBaseElementType(T); |
| 7524 | if (!EltTy->isDependentType() && |
John McCall | 2d7d2d9 | 2010-08-16 23:42:35 +0000 | [diff] [blame] | 7525 | RequireCompleteType(Loc, EltTy, diag::err_field_incomplete)) { |
| 7526 | // Fields of incomplete type force their record to be invalid. |
| 7527 | Record->setInvalidDecl(); |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 7528 | InvalidDecl = true; |
John McCall | 2d7d2d9 | 2010-08-16 23:42:35 +0000 | [diff] [blame] | 7529 | } |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 7530 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7531 | // C99 6.7.2.1p8: A member of a structure or union may have any type other |
| 7532 | // than a variably modified type. |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 7533 | if (!InvalidDecl && T->isVariablyModifiedType()) { |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 7534 | bool SizeIsNegative; |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 7535 | llvm::APSInt Oversized; |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 7536 | QualType FixedTy = TryToFixInvalidVariablyModifiedType(T, Context, |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 7537 | SizeIsNegative, |
| 7538 | Oversized); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 7539 | if (!FixedTy.isNull()) { |
| 7540 | Diag(Loc, diag::warn_illegal_constant_array_size); |
| 7541 | T = FixedTy; |
| 7542 | } else { |
| 7543 | if (SizeIsNegative) |
| 7544 | Diag(Loc, diag::err_typecheck_negative_array_size); |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 7545 | else if (Oversized.getBoolValue()) |
| 7546 | Diag(Loc, diag::err_array_too_large) |
| 7547 | << Oversized.toString(10); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 7548 | else |
| 7549 | Diag(Loc, diag::err_typecheck_field_variable_size); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 7550 | InvalidDecl = true; |
| 7551 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7552 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7553 | |
Anders Carlsson | 4681ebd | 2009-03-22 20:18:17 +0000 | [diff] [blame] | 7554 | // Fields can not have abstract class types |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 7555 | if (!InvalidDecl && RequireNonAbstractType(Loc, T, |
| 7556 | diag::err_abstract_type_in_decl, |
| 7557 | AbstractFieldType)) |
Anders Carlsson | 4681ebd | 2009-03-22 20:18:17 +0000 | [diff] [blame] | 7558 | InvalidDecl = true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7559 | |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 7560 | bool ZeroWidth = false; |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 7561 | // If this is declared as a bit-field, check the bit-field. |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 7562 | if (!InvalidDecl && BitWidth && |
| 7563 | VerifyBitField(Loc, II, T, BitWidth, &ZeroWidth)) { |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 7564 | InvalidDecl = true; |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 7565 | BitWidth = 0; |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 7566 | ZeroWidth = false; |
Anders Carlsson | 9f1e572 | 2008-12-06 20:33:04 +0000 | [diff] [blame] | 7567 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7568 | |
John McCall | 4bde1e1 | 2010-06-04 08:34:12 +0000 | [diff] [blame] | 7569 | // Check that 'mutable' is consistent with the type of the declaration. |
| 7570 | if (!InvalidDecl && Mutable) { |
| 7571 | unsigned DiagID = 0; |
| 7572 | if (T->isReferenceType()) |
| 7573 | DiagID = diag::err_mutable_reference; |
| 7574 | else if (T.isConstQualified()) |
| 7575 | DiagID = diag::err_mutable_const; |
| 7576 | |
| 7577 | if (DiagID) { |
| 7578 | SourceLocation ErrLoc = Loc; |
| 7579 | if (D && D->getDeclSpec().getStorageClassSpecLoc().isValid()) |
| 7580 | ErrLoc = D->getDeclSpec().getStorageClassSpecLoc(); |
| 7581 | Diag(ErrLoc, DiagID); |
| 7582 | Mutable = false; |
| 7583 | InvalidDecl = true; |
| 7584 | } |
| 7585 | } |
| 7586 | |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 7587 | FieldDecl *NewFD = FieldDecl::Create(Context, Record, TSSL, Loc, II, T, TInfo, |
Argyrios Kyrtzidis | a5d8200 | 2009-08-21 00:31:54 +0000 | [diff] [blame] | 7588 | BitWidth, Mutable); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 7589 | if (InvalidDecl) |
| 7590 | NewFD->setInvalidDecl(); |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 7591 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 7592 | if (PrevDecl && !isa<TagDecl>(PrevDecl)) { |
| 7593 | Diag(Loc, diag::err_duplicate_member) << II; |
| 7594 | Diag(PrevDecl->getLocation(), diag::note_previous_declaration); |
| 7595 | NewFD->setInvalidDecl(); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 7596 | } |
| 7597 | |
John McCall | 86ff308 | 2010-02-04 22:26:26 +0000 | [diff] [blame] | 7598 | if (!InvalidDecl && getLangOptions().CPlusPlus) { |
Anders Carlsson | dfdfc58 | 2010-11-07 19:13:55 +0000 | [diff] [blame] | 7599 | if (Record->isUnion()) { |
| 7600 | if (const RecordType *RT = EltTy->getAs<RecordType>()) { |
| 7601 | CXXRecordDecl* RDecl = cast<CXXRecordDecl>(RT->getDecl()); |
| 7602 | if (RDecl->getDefinition()) { |
| 7603 | // C++ [class.union]p1: An object of a class with a non-trivial |
| 7604 | // constructor, a non-trivial copy constructor, a non-trivial |
| 7605 | // destructor, or a non-trivial copy assignment operator |
| 7606 | // cannot be a member of a union, nor can an array of such |
| 7607 | // objects. |
| 7608 | // TODO: C++0x alters this restriction significantly. |
| 7609 | if (CheckNontrivialField(NewFD)) |
| 7610 | NewFD->setInvalidDecl(); |
| 7611 | } |
| 7612 | } |
| 7613 | |
| 7614 | // C++ [class.union]p1: If a union contains a member of reference type, |
| 7615 | // the program is ill-formed. |
| 7616 | if (EltTy->isReferenceType()) { |
| 7617 | Diag(NewFD->getLocation(), diag::err_union_member_of_reference_type) |
| 7618 | << NewFD->getDeclName() << EltTy; |
| 7619 | NewFD->setInvalidDecl(); |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7620 | } |
| 7621 | } |
| 7622 | } |
| 7623 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 7624 | // FIXME: We need to pass in the attributes given an AST |
| 7625 | // representation, not a parser representation. |
| 7626 | if (D) |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 7627 | // FIXME: What to pass instead of TUScope? |
| 7628 | ProcessDeclAttributes(TUScope, NewFD, *D); |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 7629 | |
Fariborz Jahanian | f6123ca | 2009-02-19 00:22:47 +0000 | [diff] [blame] | 7630 | if (T.isObjCGCWeak()) |
Fariborz Jahanian | ed7e9ef | 2009-02-18 18:14:41 +0000 | [diff] [blame] | 7631 | Diag(Loc, diag::warn_attribute_weak_on_field); |
Anders Carlsson | ad14806 | 2008-02-16 00:29:18 +0000 | [diff] [blame] | 7632 | |
Douglas Gregor | 4dd55f5 | 2009-03-11 20:50:30 +0000 | [diff] [blame] | 7633 | NewFD->setAccess(AS); |
Steve Naroff | 5912a35 | 2007-08-28 20:14:24 +0000 | [diff] [blame] | 7634 | return NewFD; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7635 | } |
| 7636 | |
Argyrios Kyrtzidis | dd7744d | 2010-08-16 17:27:08 +0000 | [diff] [blame] | 7637 | bool Sema::CheckNontrivialField(FieldDecl *FD) { |
| 7638 | assert(FD); |
| 7639 | assert(getLangOptions().CPlusPlus && "valid check only for C++"); |
| 7640 | |
| 7641 | if (FD->isInvalidDecl()) |
| 7642 | return true; |
| 7643 | |
| 7644 | QualType EltTy = Context.getBaseElementType(FD->getType()); |
| 7645 | if (const RecordType *RT = EltTy->getAs<RecordType>()) { |
| 7646 | CXXRecordDecl* RDecl = cast<CXXRecordDecl>(RT->getDecl()); |
| 7647 | if (RDecl->getDefinition()) { |
| 7648 | // We check for copy constructors before constructors |
| 7649 | // because otherwise we'll never get complaints about |
| 7650 | // copy constructors. |
| 7651 | |
| 7652 | CXXSpecialMember member = CXXInvalid; |
| 7653 | if (!RDecl->hasTrivialCopyConstructor()) |
| 7654 | member = CXXCopyConstructor; |
| 7655 | else if (!RDecl->hasTrivialConstructor()) |
| 7656 | member = CXXConstructor; |
| 7657 | else if (!RDecl->hasTrivialCopyAssignment()) |
| 7658 | member = CXXCopyAssignment; |
| 7659 | else if (!RDecl->hasTrivialDestructor()) |
| 7660 | member = CXXDestructor; |
| 7661 | |
| 7662 | if (member != CXXInvalid) { |
| 7663 | Diag(FD->getLocation(), diag::err_illegal_union_or_anon_struct_member) |
| 7664 | << (int)FD->getParent()->isUnion() << FD->getDeclName() << member; |
| 7665 | DiagnoseNontrivial(RT, member); |
| 7666 | return true; |
| 7667 | } |
| 7668 | } |
| 7669 | } |
| 7670 | |
| 7671 | return false; |
| 7672 | } |
| 7673 | |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7674 | /// DiagnoseNontrivial - Given that a class has a non-trivial |
| 7675 | /// special member, figure out why. |
| 7676 | void Sema::DiagnoseNontrivial(const RecordType* T, CXXSpecialMember member) { |
| 7677 | QualType QT(T, 0U); |
| 7678 | CXXRecordDecl* RD = cast<CXXRecordDecl>(T->getDecl()); |
| 7679 | |
| 7680 | // Check whether the member was user-declared. |
| 7681 | switch (member) { |
Douglas Gregor | 66dd939 | 2010-04-22 14:36:26 +0000 | [diff] [blame] | 7682 | case CXXInvalid: |
| 7683 | break; |
| 7684 | |
Anders Carlsson | 3b8c53b | 2010-04-22 05:40:53 +0000 | [diff] [blame] | 7685 | case CXXConstructor: |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7686 | if (RD->hasUserDeclaredConstructor()) { |
| 7687 | typedef CXXRecordDecl::ctor_iterator ctor_iter; |
Sebastian Redl | 38fd4d0 | 2009-10-25 22:31:45 +0000 | [diff] [blame] | 7688 | for (ctor_iter ci = RD->ctor_begin(), ce = RD->ctor_end(); ci != ce;++ci){ |
| 7689 | const FunctionDecl *body = 0; |
Argyrios Kyrtzidis | 06a54a3 | 2010-07-07 11:31:19 +0000 | [diff] [blame] | 7690 | ci->hasBody(body); |
Anders Carlsson | 10dc0f8 | 2010-04-20 23:32:58 +0000 | [diff] [blame] | 7691 | if (!body || !cast<CXXConstructorDecl>(body)->isImplicitlyDefined()) { |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7692 | SourceLocation CtorLoc = ci->getLocation(); |
| 7693 | Diag(CtorLoc, diag::note_nontrivial_user_defined) << QT << member; |
| 7694 | return; |
| 7695 | } |
Sebastian Redl | 38fd4d0 | 2009-10-25 22:31:45 +0000 | [diff] [blame] | 7696 | } |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7697 | |
| 7698 | assert(0 && "found no user-declared constructors"); |
| 7699 | return; |
| 7700 | } |
| 7701 | break; |
| 7702 | |
| 7703 | case CXXCopyConstructor: |
| 7704 | if (RD->hasUserDeclaredCopyConstructor()) { |
| 7705 | SourceLocation CtorLoc = |
| 7706 | RD->getCopyConstructor(Context, 0)->getLocation(); |
| 7707 | Diag(CtorLoc, diag::note_nontrivial_user_defined) << QT << member; |
| 7708 | return; |
| 7709 | } |
| 7710 | break; |
| 7711 | |
| 7712 | case CXXCopyAssignment: |
| 7713 | if (RD->hasUserDeclaredCopyAssignment()) { |
| 7714 | // FIXME: this should use the location of the copy |
| 7715 | // assignment, not the type. |
| 7716 | SourceLocation TyLoc = RD->getSourceRange().getBegin(); |
| 7717 | Diag(TyLoc, diag::note_nontrivial_user_defined) << QT << member; |
| 7718 | return; |
| 7719 | } |
| 7720 | break; |
| 7721 | |
| 7722 | case CXXDestructor: |
| 7723 | if (RD->hasUserDeclaredDestructor()) { |
Douglas Gregor | db89f28 | 2010-07-01 22:47:18 +0000 | [diff] [blame] | 7724 | SourceLocation DtorLoc = LookupDestructor(RD)->getLocation(); |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7725 | Diag(DtorLoc, diag::note_nontrivial_user_defined) << QT << member; |
| 7726 | return; |
| 7727 | } |
| 7728 | break; |
| 7729 | } |
| 7730 | |
| 7731 | typedef CXXRecordDecl::base_class_iterator base_iter; |
| 7732 | |
| 7733 | // Virtual bases and members inhibit trivial copying/construction, |
| 7734 | // but not trivial destruction. |
| 7735 | if (member != CXXDestructor) { |
| 7736 | // Check for virtual bases. vbases includes indirect virtual bases, |
| 7737 | // so we just iterate through the direct bases. |
| 7738 | for (base_iter bi = RD->bases_begin(), be = RD->bases_end(); bi != be; ++bi) |
| 7739 | if (bi->isVirtual()) { |
| 7740 | SourceLocation BaseLoc = bi->getSourceRange().getBegin(); |
| 7741 | Diag(BaseLoc, diag::note_nontrivial_has_virtual) << QT << 1; |
| 7742 | return; |
| 7743 | } |
| 7744 | |
| 7745 | // Check for virtual methods. |
| 7746 | typedef CXXRecordDecl::method_iterator meth_iter; |
| 7747 | for (meth_iter mi = RD->method_begin(), me = RD->method_end(); mi != me; |
| 7748 | ++mi) { |
| 7749 | if (mi->isVirtual()) { |
| 7750 | SourceLocation MLoc = mi->getSourceRange().getBegin(); |
| 7751 | Diag(MLoc, diag::note_nontrivial_has_virtual) << QT << 0; |
| 7752 | return; |
| 7753 | } |
| 7754 | } |
| 7755 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7756 | |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7757 | bool (CXXRecordDecl::*hasTrivial)() const; |
| 7758 | switch (member) { |
Anders Carlsson | 3b8c53b | 2010-04-22 05:40:53 +0000 | [diff] [blame] | 7759 | case CXXConstructor: |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7760 | hasTrivial = &CXXRecordDecl::hasTrivialConstructor; break; |
| 7761 | case CXXCopyConstructor: |
| 7762 | hasTrivial = &CXXRecordDecl::hasTrivialCopyConstructor; break; |
| 7763 | case CXXCopyAssignment: |
| 7764 | hasTrivial = &CXXRecordDecl::hasTrivialCopyAssignment; break; |
| 7765 | case CXXDestructor: |
| 7766 | hasTrivial = &CXXRecordDecl::hasTrivialDestructor; break; |
| 7767 | default: |
| 7768 | assert(0 && "unexpected special member"); return; |
| 7769 | } |
| 7770 | |
| 7771 | // Check for nontrivial bases (and recurse). |
| 7772 | for (base_iter bi = RD->bases_begin(), be = RD->bases_end(); bi != be; ++bi) { |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 7773 | const RecordType *BaseRT = bi->getType()->getAs<RecordType>(); |
Sebastian Redl | 9994a34 | 2009-10-25 17:03:50 +0000 | [diff] [blame] | 7774 | assert(BaseRT && "Don't know how to handle dependent bases"); |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7775 | CXXRecordDecl *BaseRecTy = cast<CXXRecordDecl>(BaseRT->getDecl()); |
| 7776 | if (!(BaseRecTy->*hasTrivial)()) { |
| 7777 | SourceLocation BaseLoc = bi->getSourceRange().getBegin(); |
| 7778 | Diag(BaseLoc, diag::note_nontrivial_has_nontrivial) << QT << 1 << member; |
| 7779 | DiagnoseNontrivial(BaseRT, member); |
| 7780 | return; |
| 7781 | } |
| 7782 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7783 | |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7784 | // Check for nontrivial members (and recurse). |
| 7785 | typedef RecordDecl::field_iterator field_iter; |
| 7786 | for (field_iter fi = RD->field_begin(), fe = RD->field_end(); fi != fe; |
| 7787 | ++fi) { |
Douglas Gregor | 5e03f9e | 2009-07-23 23:49:00 +0000 | [diff] [blame] | 7788 | QualType EltTy = Context.getBaseElementType((*fi)->getType()); |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 7789 | if (const RecordType *EltRT = EltTy->getAs<RecordType>()) { |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7790 | CXXRecordDecl* EltRD = cast<CXXRecordDecl>(EltRT->getDecl()); |
| 7791 | |
| 7792 | if (!(EltRD->*hasTrivial)()) { |
| 7793 | SourceLocation FLoc = (*fi)->getLocation(); |
| 7794 | Diag(FLoc, diag::note_nontrivial_has_nontrivial) << QT << 0 << member; |
| 7795 | DiagnoseNontrivial(EltRT, member); |
| 7796 | return; |
| 7797 | } |
| 7798 | } |
| 7799 | } |
| 7800 | |
| 7801 | assert(0 && "found no explanation for non-trivial member"); |
| 7802 | } |
| 7803 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7804 | /// TranslateIvarVisibility - Translate visibility from a token ID to an |
Fariborz Jahanian | 89204a1 | 2007-10-01 16:53:59 +0000 | [diff] [blame] | 7805 | /// AST enum value. |
Ted Kremenek | a526c5c | 2008-01-07 19:49:32 +0000 | [diff] [blame] | 7806 | static ObjCIvarDecl::AccessControl |
Fariborz Jahanian | 89204a1 | 2007-10-01 16:53:59 +0000 | [diff] [blame] | 7807 | TranslateIvarVisibility(tok::ObjCKeywordKind ivarVisibility) { |
Steve Naroff | f13271f | 2007-09-14 23:09:53 +0000 | [diff] [blame] | 7808 | switch (ivarVisibility) { |
Chris Lattner | 33d34a6 | 2008-10-12 00:28:42 +0000 | [diff] [blame] | 7809 | default: assert(0 && "Unknown visitibility kind"); |
| 7810 | case tok::objc_private: return ObjCIvarDecl::Private; |
| 7811 | case tok::objc_public: return ObjCIvarDecl::Public; |
| 7812 | case tok::objc_protected: return ObjCIvarDecl::Protected; |
| 7813 | case tok::objc_package: return ObjCIvarDecl::Package; |
Steve Naroff | f13271f | 2007-09-14 23:09:53 +0000 | [diff] [blame] | 7814 | } |
| 7815 | } |
| 7816 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7817 | /// ActOnIvar - Each ivar field of an objective-c class is passed into this |
Fariborz Jahanian | 45bc03f | 2008-04-11 16:55:42 +0000 | [diff] [blame] | 7818 | /// in order to create an IvarDecl object for it. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7819 | Decl *Sema::ActOnIvar(Scope *S, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7820 | SourceLocation DeclStart, |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7821 | Decl *IntfDecl, |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 7822 | Declarator &D, ExprTy *BitfieldWidth, |
| 7823 | tok::ObjCKeywordKind Visibility) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7824 | |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 7825 | IdentifierInfo *II = D.getIdentifier(); |
| 7826 | Expr *BitWidth = (Expr*)BitfieldWidth; |
| 7827 | SourceLocation Loc = DeclStart; |
| 7828 | if (II) Loc = D.getIdentifierLoc(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7829 | |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 7830 | // FIXME: Unnamed fields can be handled in various different ways, for |
| 7831 | // example, unnamed unions inject all members into the struct namespace! |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7832 | |
John McCall | bf1a028 | 2010-06-04 23:28:52 +0000 | [diff] [blame] | 7833 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); |
| 7834 | QualType T = TInfo->getType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7835 | |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 7836 | if (BitWidth) { |
Steve Naroff | 63359c8 | 2009-02-20 17:57:11 +0000 | [diff] [blame] | 7837 | // 6.7.2.1p3, 6.7.2.1p4 |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 7838 | if (VerifyBitField(Loc, II, T, BitWidth)) { |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 7839 | D.setInvalidType(); |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 7840 | BitWidth = 0; |
| 7841 | } |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 7842 | } else { |
| 7843 | // Not a bitfield. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7844 | |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 7845 | // validate II. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7846 | |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 7847 | } |
Fariborz Jahanian | 0b7bc8e | 2010-04-26 22:07:03 +0000 | [diff] [blame] | 7848 | if (T->isReferenceType()) { |
| 7849 | Diag(Loc, diag::err_ivar_reference_type); |
| 7850 | D.setInvalidType(); |
| 7851 | } |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 7852 | // C99 6.7.2.1p8: A member of a structure or union may have any type other |
| 7853 | // than a variably modified type. |
Fariborz Jahanian | 0b7bc8e | 2010-04-26 22:07:03 +0000 | [diff] [blame] | 7854 | else if (T->isVariablyModifiedType()) { |
Anders Carlsson | 96e05bc | 2008-12-07 00:20:55 +0000 | [diff] [blame] | 7855 | Diag(Loc, diag::err_typecheck_ivar_variable_size); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 7856 | D.setInvalidType(); |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 7857 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7858 | |
Ted Kremenek | b8db21d | 2008-07-23 18:04:17 +0000 | [diff] [blame] | 7859 | // Get the visibility (access control) for this ivar. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7860 | ObjCIvarDecl::AccessControl ac = |
Ted Kremenek | b8db21d | 2008-07-23 18:04:17 +0000 | [diff] [blame] | 7861 | Visibility != tok::objc_not_keyword ? TranslateIvarVisibility(Visibility) |
| 7862 | : ObjCIvarDecl::None; |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 7863 | // Must set ivar's DeclContext to its enclosing interface. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7864 | ObjCContainerDecl *EnclosingDecl = cast<ObjCContainerDecl>(IntfDecl); |
Daniel Dunbar | a19331f | 2010-04-02 18:29:09 +0000 | [diff] [blame] | 7865 | ObjCContainerDecl *EnclosingContext; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7866 | if (ObjCImplementationDecl *IMPDecl = |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 7867 | dyn_cast<ObjCImplementationDecl>(EnclosingDecl)) { |
Fariborz Jahanian | 000835d | 2010-08-23 18:51:39 +0000 | [diff] [blame] | 7868 | if (!LangOpts.ObjCNonFragileABI2) { |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 7869 | // Case of ivar declared in an implementation. Context is that of its class. |
Fariborz Jahanian | 000835d | 2010-08-23 18:51:39 +0000 | [diff] [blame] | 7870 | EnclosingContext = IMPDecl->getClassInterface(); |
| 7871 | assert(EnclosingContext && "Implementation has no class interface!"); |
| 7872 | } |
| 7873 | else |
| 7874 | EnclosingContext = EnclosingDecl; |
Fariborz Jahanian | 0bd0459 | 2010-04-06 22:43:48 +0000 | [diff] [blame] | 7875 | } else { |
| 7876 | if (ObjCCategoryDecl *CDecl = |
| 7877 | dyn_cast<ObjCCategoryDecl>(EnclosingDecl)) { |
| 7878 | if (!LangOpts.ObjCNonFragileABI2 || !CDecl->IsClassExtension()) { |
| 7879 | Diag(Loc, diag::err_misplaced_ivar) << CDecl->IsClassExtension(); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7880 | return 0; |
Fariborz Jahanian | 0bd0459 | 2010-04-06 22:43:48 +0000 | [diff] [blame] | 7881 | } |
| 7882 | } |
Daniel Dunbar | a19331f | 2010-04-02 18:29:09 +0000 | [diff] [blame] | 7883 | EnclosingContext = EnclosingDecl; |
Fariborz Jahanian | 0bd0459 | 2010-04-06 22:43:48 +0000 | [diff] [blame] | 7884 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7885 | |
Ted Kremenek | b8db21d | 2008-07-23 18:04:17 +0000 | [diff] [blame] | 7886 | // Construct the decl. |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 7887 | ObjCIvarDecl *NewID = ObjCIvarDecl::Create(Context, EnclosingContext, |
| 7888 | DeclStart, Loc, II, T, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 7889 | TInfo, ac, (Expr *)BitfieldWidth); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7890 | |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 7891 | if (II) { |
Douglas Gregor | c83c687 | 2010-04-15 22:33:43 +0000 | [diff] [blame] | 7892 | NamedDecl *PrevDecl = LookupSingleName(S, II, Loc, LookupMemberName, |
John McCall | 7d384dd | 2009-11-18 07:57:50 +0000 | [diff] [blame] | 7893 | ForRedeclaration); |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 7894 | if (PrevDecl && isDeclInScope(PrevDecl, EnclosingContext, S) |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 7895 | && !isa<TagDecl>(PrevDecl)) { |
| 7896 | Diag(Loc, diag::err_duplicate_member) << II; |
| 7897 | Diag(PrevDecl->getLocation(), diag::note_previous_declaration); |
| 7898 | NewID->setInvalidDecl(); |
| 7899 | } |
| 7900 | } |
| 7901 | |
Ted Kremenek | b8db21d | 2008-07-23 18:04:17 +0000 | [diff] [blame] | 7902 | // Process attributes attached to the ivar. |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 7903 | ProcessDeclAttributes(S, NewID, D); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7904 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 7905 | if (D.isInvalidType()) |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 7906 | NewID->setInvalidDecl(); |
Ted Kremenek | b8db21d | 2008-07-23 18:04:17 +0000 | [diff] [blame] | 7907 | |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 7908 | if (II) { |
| 7909 | // FIXME: When interfaces are DeclContexts, we'll need to add |
| 7910 | // these to the interface. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7911 | S->AddDecl(NewID); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 7912 | IdResolver.AddDecl(NewID); |
| 7913 | } |
| 7914 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7915 | return NewID; |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 7916 | } |
| 7917 | |
Fariborz Jahanian | d097be8 | 2010-08-23 22:46:52 +0000 | [diff] [blame] | 7918 | /// ActOnLastBitfield - This routine handles synthesized bitfields rules for |
| 7919 | /// class and class extensions. For every class @interface and class |
| 7920 | /// extension @interface, if the last ivar is a bitfield of any type, |
| 7921 | /// then add an implicit `char :0` ivar to the end of that interface. |
| 7922 | void Sema::ActOnLastBitfield(SourceLocation DeclLoc, Decl *EnclosingDecl, |
| 7923 | llvm::SmallVectorImpl<Decl *> &AllIvarDecls) { |
| 7924 | if (!LangOpts.ObjCNonFragileABI2 || AllIvarDecls.empty()) |
| 7925 | return; |
| 7926 | |
| 7927 | Decl *ivarDecl = AllIvarDecls[AllIvarDecls.size()-1]; |
| 7928 | ObjCIvarDecl *Ivar = cast<ObjCIvarDecl>(ivarDecl); |
| 7929 | |
| 7930 | if (!Ivar->isBitField()) |
| 7931 | return; |
| 7932 | uint64_t BitFieldSize = |
| 7933 | Ivar->getBitWidth()->EvaluateAsInt(Context).getZExtValue(); |
| 7934 | if (BitFieldSize == 0) |
| 7935 | return; |
| 7936 | ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(EnclosingDecl); |
| 7937 | if (!ID) { |
| 7938 | if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(EnclosingDecl)) { |
| 7939 | if (!CD->IsClassExtension()) |
| 7940 | return; |
| 7941 | } |
| 7942 | // No need to add this to end of @implementation. |
| 7943 | else |
| 7944 | return; |
| 7945 | } |
| 7946 | // All conditions are met. Add a new bitfield to the tail end of ivars. |
| 7947 | llvm::APInt Zero(Context.getTypeSize(Context.CharTy), 0); |
Argyrios Kyrtzidis | 9996a7f | 2010-08-28 09:06:06 +0000 | [diff] [blame] | 7948 | Expr * BW = IntegerLiteral::Create(Context, Zero, Context.CharTy, DeclLoc); |
Fariborz Jahanian | d097be8 | 2010-08-23 22:46:52 +0000 | [diff] [blame] | 7949 | |
| 7950 | Ivar = ObjCIvarDecl::Create(Context, cast<ObjCContainerDecl>(EnclosingDecl), |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 7951 | DeclLoc, DeclLoc, 0, |
Fariborz Jahanian | d097be8 | 2010-08-23 22:46:52 +0000 | [diff] [blame] | 7952 | Context.CharTy, |
| 7953 | Context.CreateTypeSourceInfo(Context.CharTy), |
| 7954 | ObjCIvarDecl::Private, BW, |
| 7955 | true); |
| 7956 | AllIvarDecls.push_back(Ivar); |
| 7957 | } |
| 7958 | |
Fariborz Jahanian | 9d048ff | 2007-09-29 00:54:24 +0000 | [diff] [blame] | 7959 | void Sema::ActOnFields(Scope* S, |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7960 | SourceLocation RecLoc, Decl *EnclosingDecl, |
| 7961 | Decl **Fields, unsigned NumFields, |
Daniel Dunbar | 1bfe1c2 | 2008-10-03 02:03:53 +0000 | [diff] [blame] | 7962 | SourceLocation LBrac, SourceLocation RBrac, |
Daniel Dunbar | 7d07664 | 2008-10-03 17:33:35 +0000 | [diff] [blame] | 7963 | AttributeList *Attr) { |
Steve Naroff | 7421664 | 2007-09-14 22:20:54 +0000 | [diff] [blame] | 7964 | assert(EnclosingDecl && "missing record or interface decl"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7965 | |
Chris Lattner | 1829a6d | 2009-02-23 22:00:08 +0000 | [diff] [blame] | 7966 | // If the decl this is being inserted into is invalid, then it may be a |
| 7967 | // redeclaration or some other bogus case. Don't try to add fields to it. |
| 7968 | if (EnclosingDecl->isInvalidDecl()) { |
| 7969 | // FIXME: Deallocate fields? |
| 7970 | return; |
| 7971 | } |
| 7972 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7973 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7974 | // Verify that all the fields are okay. |
| 7975 | unsigned NumNamedMembers = 0; |
| 7976 | llvm::SmallVector<FieldDecl*, 32> RecFields; |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 7977 | |
Chris Lattner | 1829a6d | 2009-02-23 22:00:08 +0000 | [diff] [blame] | 7978 | RecordDecl *Record = dyn_cast<RecordDecl>(EnclosingDecl); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7979 | for (unsigned i = 0; i != NumFields; ++i) { |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7980 | FieldDecl *FD = cast<FieldDecl>(Fields[i]); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7981 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7982 | // Get the type for the field. |
John McCall | f4c7371 | 2011-01-19 06:33:43 +0000 | [diff] [blame] | 7983 | const Type *FDTy = FD->getType().getTypePtr(); |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 7984 | |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 7985 | if (!FD->isAnonymousStructOrUnion()) { |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 7986 | // Remember all fields written by the user. |
| 7987 | RecFields.push_back(FD); |
| 7988 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7989 | |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 7990 | // If the field is already invalid for some reason, don't emit more |
| 7991 | // diagnostics about it. |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 7992 | if (FD->isInvalidDecl()) { |
| 7993 | EnclosingDecl->setInvalidDecl(); |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 7994 | continue; |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 7995 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7996 | |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 7997 | // C99 6.7.2.1p2: |
| 7998 | // A structure or union shall not contain a member with |
| 7999 | // incomplete or function type (hence, a structure shall not |
| 8000 | // contain an instance of itself, but may contain a pointer to |
| 8001 | // an instance of itself), except that the last member of a |
| 8002 | // structure with more than one named member may have incomplete |
| 8003 | // array type; such a structure (and any union containing, |
| 8004 | // possibly recursively, a member that is such a structure) |
| 8005 | // shall not be a member of a structure or an element of an |
| 8006 | // array. |
Chris Lattner | 02c642e | 2007-07-31 21:33:24 +0000 | [diff] [blame] | 8007 | if (FDTy->isFunctionType()) { |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 8008 | // Field declared as a function. |
Chris Lattner | f3a41af | 2008-11-20 06:38:18 +0000 | [diff] [blame] | 8009 | Diag(FD->getLocation(), diag::err_field_declared_as_function) |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 8010 | << FD->getDeclName(); |
Steve Naroff | 7421664 | 2007-09-14 22:20:54 +0000 | [diff] [blame] | 8011 | FD->setInvalidDecl(); |
| 8012 | EnclosingDecl->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8013 | continue; |
Francois Pichet | 0924618 | 2010-09-15 00:14:08 +0000 | [diff] [blame] | 8014 | } else if (FDTy->isIncompleteArrayType() && Record && |
| 8015 | ((i == NumFields - 1 && !Record->isUnion()) || |
Argyrios Kyrtzidis | d97cec3 | 2011-03-07 20:04:04 +0000 | [diff] [blame] | 8016 | ((getLangOptions().Microsoft || getLangOptions().CPlusPlus) && |
Francois Pichet | 0924618 | 2010-09-15 00:14:08 +0000 | [diff] [blame] | 8017 | (i == NumFields - 1 || Record->isUnion())))) { |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 8018 | // Flexible array member. |
Argyrios Kyrtzidis | d97cec3 | 2011-03-07 20:04:04 +0000 | [diff] [blame] | 8019 | // Microsoft and g++ is more permissive regarding flexible array. |
Francois Pichet | 0924618 | 2010-09-15 00:14:08 +0000 | [diff] [blame] | 8020 | // It will accept flexible array in union and also |
Anders Carlsson | 4d09e84 | 2010-10-17 23:36:12 +0000 | [diff] [blame] | 8021 | // as the sole element of a struct/class. |
Francois Pichet | 0924618 | 2010-09-15 00:14:08 +0000 | [diff] [blame] | 8022 | if (getLangOptions().Microsoft) { |
| 8023 | if (Record->isUnion()) |
Argyrios Kyrtzidis | d97cec3 | 2011-03-07 20:04:04 +0000 | [diff] [blame] | 8024 | Diag(FD->getLocation(), diag::ext_flexible_array_union_ms) |
Francois Pichet | 0924618 | 2010-09-15 00:14:08 +0000 | [diff] [blame] | 8025 | << FD->getDeclName(); |
| 8026 | else if (NumFields == 1) |
Argyrios Kyrtzidis | d97cec3 | 2011-03-07 20:04:04 +0000 | [diff] [blame] | 8027 | Diag(FD->getLocation(), diag::ext_flexible_array_empty_aggregate_ms) |
Francois Pichet | 0924618 | 2010-09-15 00:14:08 +0000 | [diff] [blame] | 8028 | << FD->getDeclName() << Record->getTagKind(); |
Argyrios Kyrtzidis | d97cec3 | 2011-03-07 20:04:04 +0000 | [diff] [blame] | 8029 | } else if (getLangOptions().CPlusPlus) { |
| 8030 | if (Record->isUnion()) |
| 8031 | Diag(FD->getLocation(), diag::ext_flexible_array_union_gnu) |
| 8032 | << FD->getDeclName(); |
| 8033 | else if (NumFields == 1) |
| 8034 | Diag(FD->getLocation(), diag::ext_flexible_array_empty_aggregate_gnu) |
| 8035 | << FD->getDeclName() << Record->getTagKind(); |
| 8036 | } else if (NumNamedMembers < 1) { |
Chris Lattner | f3a41af | 2008-11-20 06:38:18 +0000 | [diff] [blame] | 8037 | Diag(FD->getLocation(), diag::err_flexible_array_empty_struct) |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 8038 | << FD->getDeclName(); |
Steve Naroff | 7421664 | 2007-09-14 22:20:54 +0000 | [diff] [blame] | 8039 | FD->setInvalidDecl(); |
| 8040 | EnclosingDecl->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8041 | continue; |
| 8042 | } |
Fariborz Jahanian | 4142ceb | 2010-05-26 20:19:07 +0000 | [diff] [blame] | 8043 | if (!FD->getType()->isDependentType() && |
| 8044 | !Context.getBaseElementType(FD->getType())->isPODType()) { |
| 8045 | Diag(FD->getLocation(), diag::err_flexible_array_has_nonpod_type) |
Fariborz Jahanian | 2c0a540 | 2010-05-26 20:46:24 +0000 | [diff] [blame] | 8046 | << FD->getDeclName() << FD->getType(); |
Fariborz Jahanian | 4142ceb | 2010-05-26 20:19:07 +0000 | [diff] [blame] | 8047 | FD->setInvalidDecl(); |
| 8048 | EnclosingDecl->setInvalidDecl(); |
| 8049 | continue; |
| 8050 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8051 | // Okay, we have a legal flexible array member at the end of the struct. |
Fariborz Jahanian | e267ab6 | 2007-09-14 16:27:55 +0000 | [diff] [blame] | 8052 | if (Record) |
| 8053 | Record->setHasFlexibleArrayMember(true); |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 8054 | } else if (!FDTy->isDependentType() && |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8055 | RequireCompleteType(FD->getLocation(), FD->getType(), |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 8056 | diag::err_field_incomplete)) { |
| 8057 | // Incomplete type |
| 8058 | FD->setInvalidDecl(); |
| 8059 | EnclosingDecl->setInvalidDecl(); |
| 8060 | continue; |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 8061 | } else if (const RecordType *FDTTy = FDTy->getAs<RecordType>()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8062 | if (FDTTy->getDecl()->hasFlexibleArrayMember()) { |
| 8063 | // If this is a member of a union, then entire union becomes "flexible". |
Argyrios Kyrtzidis | 39ba4ae | 2008-06-09 23:19:58 +0000 | [diff] [blame] | 8064 | if (Record && Record->isUnion()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8065 | Record->setHasFlexibleArrayMember(true); |
| 8066 | } else { |
| 8067 | // If this is a struct/class and this is not the last element, reject |
| 8068 | // it. Note that GCC supports variable sized arrays in the middle of |
| 8069 | // structures. |
Douglas Gregor | e4f3e06 | 2009-03-06 23:41:27 +0000 | [diff] [blame] | 8070 | if (i != NumFields-1) |
| 8071 | Diag(FD->getLocation(), diag::ext_variable_sized_type_in_struct) |
Chris Lattner | 740782a | 2009-04-25 18:52:45 +0000 | [diff] [blame] | 8072 | << FD->getDeclName() << FD->getType(); |
Douglas Gregor | e4f3e06 | 2009-03-06 23:41:27 +0000 | [diff] [blame] | 8073 | else { |
| 8074 | // We support flexible arrays at the end of structs in |
| 8075 | // other structs as an extension. |
| 8076 | Diag(FD->getLocation(), diag::ext_flexible_array_in_struct) |
| 8077 | << FD->getDeclName(); |
| 8078 | if (Record) |
| 8079 | Record->setHasFlexibleArrayMember(true); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8080 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8081 | } |
| 8082 | } |
Fariborz Jahanian | 082b02e | 2009-07-08 01:18:33 +0000 | [diff] [blame] | 8083 | if (Record && FDTTy->getDecl()->hasObjectMember()) |
| 8084 | Record->setHasObjectMember(true); |
John McCall | c12c5bb | 2010-05-15 11:32:37 +0000 | [diff] [blame] | 8085 | } else if (FDTy->isObjCObjectType()) { |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 8086 | /// A field cannot be an Objective-c object |
Steve Naroff | ccef371 | 2009-02-20 22:59:16 +0000 | [diff] [blame] | 8087 | Diag(FD->getLocation(), diag::err_statically_allocated_object); |
Fariborz Jahanian | e7f64cc | 2007-10-12 22:10:42 +0000 | [diff] [blame] | 8088 | FD->setInvalidDecl(); |
| 8089 | EnclosingDecl->setInvalidDecl(); |
| 8090 | continue; |
Mike Stump | ac5fc7c | 2009-08-04 21:02:39 +0000 | [diff] [blame] | 8091 | } else if (getLangOptions().ObjC1 && |
| 8092 | getLangOptions().getGCMode() != LangOptions::NonGC && |
| 8093 | Record && |
| 8094 | (FD->getType()->isObjCObjectPointerType() || |
| 8095 | FD->getType().isObjCGCStrong())) |
Fariborz Jahanian | 082b02e | 2009-07-08 01:18:33 +0000 | [diff] [blame] | 8096 | Record->setHasObjectMember(true); |
Fariborz Jahanian | 55bcace | 2010-06-15 22:44:06 +0000 | [diff] [blame] | 8097 | else if (Context.getAsArrayType(FD->getType())) { |
| 8098 | QualType BaseType = Context.getBaseElementType(FD->getType()); |
| 8099 | if (Record && BaseType->isRecordType() && |
| 8100 | BaseType->getAs<RecordType>()->getDecl()->hasObjectMember()) |
| 8101 | Record->setHasObjectMember(true); |
| 8102 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8103 | // Keep track of the number of named members. |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 8104 | if (FD->getIdentifier()) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8105 | ++NumNamedMembers; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8106 | } |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 8107 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8108 | // Okay, we successfully defined 'Record'. |
Chris Lattner | e1e7985 | 2008-02-06 00:51:33 +0000 | [diff] [blame] | 8109 | if (Record) { |
Douglas Gregor | 7a39dd0 | 2010-09-29 00:15:42 +0000 | [diff] [blame] | 8110 | bool Completed = false; |
| 8111 | if (CXXRecordDecl *CXXRecord = dyn_cast<CXXRecordDecl>(Record)) { |
| 8112 | if (!CXXRecord->isInvalidDecl()) { |
| 8113 | // Set access bits correctly on the directly-declared conversions. |
| 8114 | UnresolvedSetImpl *Convs = CXXRecord->getConversionFunctions(); |
| 8115 | for (UnresolvedSetIterator I = Convs->begin(), E = Convs->end(); |
| 8116 | I != E; ++I) |
| 8117 | Convs->setAccess(I, (*I)->getAccess()); |
| 8118 | |
| 8119 | if (!CXXRecord->isDependentType()) { |
| 8120 | // Add any implicitly-declared members to this class. |
| 8121 | AddImplicitlyDeclaredMembersToClass(CXXRecord); |
| 8122 | |
| 8123 | // If we have virtual base classes, we may end up finding multiple |
| 8124 | // final overriders for a given virtual function. Check for this |
| 8125 | // problem now. |
| 8126 | if (CXXRecord->getNumVBases()) { |
| 8127 | CXXFinalOverriderMap FinalOverriders; |
| 8128 | CXXRecord->getFinalOverriders(FinalOverriders); |
| 8129 | |
| 8130 | for (CXXFinalOverriderMap::iterator M = FinalOverriders.begin(), |
| 8131 | MEnd = FinalOverriders.end(); |
| 8132 | M != MEnd; ++M) { |
| 8133 | for (OverridingMethods::iterator SO = M->second.begin(), |
| 8134 | SOEnd = M->second.end(); |
| 8135 | SO != SOEnd; ++SO) { |
| 8136 | assert(SO->second.size() > 0 && |
| 8137 | "Virtual function without overridding functions?"); |
| 8138 | if (SO->second.size() == 1) |
| 8139 | continue; |
| 8140 | |
| 8141 | // C++ [class.virtual]p2: |
| 8142 | // In a derived class, if a virtual member function of a base |
| 8143 | // class subobject has more than one final overrider the |
| 8144 | // program is ill-formed. |
| 8145 | Diag(Record->getLocation(), diag::err_multiple_final_overriders) |
| 8146 | << (NamedDecl *)M->first << Record; |
| 8147 | Diag(M->first->getLocation(), |
| 8148 | diag::note_overridden_virtual_function); |
| 8149 | for (OverridingMethods::overriding_iterator |
| 8150 | OM = SO->second.begin(), |
| 8151 | OMEnd = SO->second.end(); |
| 8152 | OM != OMEnd; ++OM) |
| 8153 | Diag(OM->Method->getLocation(), diag::note_final_overrider) |
| 8154 | << (NamedDecl *)M->first << OM->Method->getParent(); |
| 8155 | |
| 8156 | Record->setInvalidDecl(); |
| 8157 | } |
| 8158 | } |
| 8159 | CXXRecord->completeDefinition(&FinalOverriders); |
| 8160 | Completed = true; |
| 8161 | } |
| 8162 | } |
| 8163 | } |
| 8164 | } |
| 8165 | |
| 8166 | if (!Completed) |
| 8167 | Record->completeDefinition(); |
Chris Lattner | e1e7985 | 2008-02-06 00:51:33 +0000 | [diff] [blame] | 8168 | } else { |
Jay Foad | beaaccd | 2009-05-21 09:52:38 +0000 | [diff] [blame] | 8169 | ObjCIvarDecl **ClsFields = |
| 8170 | reinterpret_cast<ObjCIvarDecl**>(RecFields.data()); |
Fariborz Jahanian | 60f8c86 | 2008-12-13 20:28:25 +0000 | [diff] [blame] | 8171 | if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(EnclosingDecl)) { |
Chris Lattner | 38af2de | 2009-02-20 21:35:13 +0000 | [diff] [blame] | 8172 | ID->setLocEnd(RBrac); |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 8173 | // Add ivar's to class's DeclContext. |
| 8174 | for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { |
| 8175 | ClsFields[i]->setLexicalDeclContext(ID); |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 8176 | ID->addDecl(ClsFields[i]); |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 8177 | } |
Fariborz Jahanian | 3281eff | 2008-12-16 01:08:35 +0000 | [diff] [blame] | 8178 | // Must enforce the rule that ivars in the base classes may not be |
| 8179 | // duplicates. |
Fariborz Jahanian | f914b97 | 2010-02-23 23:41:11 +0000 | [diff] [blame] | 8180 | if (ID->getSuperClass()) |
| 8181 | DiagnoseDuplicateIvars(ID, ID->getSuperClass()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8182 | } else if (ObjCImplementationDecl *IMPDecl = |
Chris Lattner | 1829a6d | 2009-02-23 22:00:08 +0000 | [diff] [blame] | 8183 | dyn_cast<ObjCImplementationDecl>(EnclosingDecl)) { |
Ted Kremenek | a526c5c | 2008-01-07 19:49:32 +0000 | [diff] [blame] | 8184 | assert(IMPDecl && "ActOnFields - missing ObjCImplementationDecl"); |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 8185 | for (unsigned I = 0, N = RecFields.size(); I != N; ++I) |
| 8186 | // Ivar declared in @implementation never belongs to the implementation. |
| 8187 | // Only it is in implementation's lexical context. |
Douglas Gregor | 8f36aba | 2009-04-23 03:23:08 +0000 | [diff] [blame] | 8188 | ClsFields[I]->setLexicalDeclContext(IMPDecl); |
Fariborz Jahanian | 3a3ca1b | 2007-10-31 18:48:14 +0000 | [diff] [blame] | 8189 | CheckImplementationIvars(IMPDecl, ClsFields, RecFields.size(), RBrac); |
Fariborz Jahanian | 83c481a | 2010-02-22 23:04:20 +0000 | [diff] [blame] | 8190 | } else if (ObjCCategoryDecl *CDecl = |
| 8191 | dyn_cast<ObjCCategoryDecl>(EnclosingDecl)) { |
Fariborz Jahanian | 0bd0459 | 2010-04-06 22:43:48 +0000 | [diff] [blame] | 8192 | // case of ivars in class extension; all other cases have been |
| 8193 | // reported as errors elsewhere. |
| 8194 | // FIXME. Class extension does not have a LocEnd field. |
| 8195 | // CDecl->setLocEnd(RBrac); |
| 8196 | // Add ivar's to class extension's DeclContext. |
| 8197 | for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { |
| 8198 | ClsFields[i]->setLexicalDeclContext(CDecl); |
| 8199 | CDecl->addDecl(ClsFields[i]); |
Fariborz Jahanian | 83c481a | 2010-02-22 23:04:20 +0000 | [diff] [blame] | 8200 | } |
Fariborz Jahanian | d0b90bf | 2007-09-26 18:27:25 +0000 | [diff] [blame] | 8201 | } |
Fariborz Jahanian | b04a021 | 2007-09-14 21:08:27 +0000 | [diff] [blame] | 8202 | } |
Daniel Dunbar | 7d07664 | 2008-10-03 17:33:35 +0000 | [diff] [blame] | 8203 | |
| 8204 | if (Attr) |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 8205 | ProcessDeclAttributeList(S, Record, Attr); |
Eli Friedman | aa8b0d1 | 2010-08-05 06:57:20 +0000 | [diff] [blame] | 8206 | |
| 8207 | // If there's a #pragma GCC visibility in scope, and this isn't a subclass, |
| 8208 | // set the visibility of this record. |
| 8209 | if (Record && !Record->getDeclContext()->isRecord()) |
| 8210 | AddPushedVisibilityAttribute(Record); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8211 | } |
| 8212 | |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 8213 | /// \brief Determine whether the given integral value is representable within |
| 8214 | /// the given type T. |
| 8215 | static bool isRepresentableIntegerValue(ASTContext &Context, |
| 8216 | llvm::APSInt &Value, |
| 8217 | QualType T) { |
Douglas Gregor | 9d3347a | 2010-06-16 00:35:25 +0000 | [diff] [blame] | 8218 | assert(T->isIntegralType(Context) && "Integral type required!"); |
Douglas Gregor | af68d4e | 2010-04-15 15:53:31 +0000 | [diff] [blame] | 8219 | unsigned BitWidth = Context.getIntWidth(T); |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 8220 | |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 8221 | if (Value.isUnsigned() || Value.isNonNegative()) { |
| 8222 | if (T->isSignedIntegerType()) |
| 8223 | --BitWidth; |
| 8224 | return Value.getActiveBits() <= BitWidth; |
| 8225 | } |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 8226 | return Value.getMinSignedBits() <= BitWidth; |
| 8227 | } |
| 8228 | |
| 8229 | // \brief Given an integral type, return the next larger integral type |
| 8230 | // (or a NULL type of no such type exists). |
| 8231 | static QualType getNextLargerIntegralType(ASTContext &Context, QualType T) { |
| 8232 | // FIXME: Int128/UInt128 support, which also needs to be introduced into |
| 8233 | // enum checking below. |
Douglas Gregor | 9d3347a | 2010-06-16 00:35:25 +0000 | [diff] [blame] | 8234 | assert(T->isIntegralType(Context) && "Integral type required!"); |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 8235 | const unsigned NumTypes = 4; |
| 8236 | QualType SignedIntegralTypes[NumTypes] = { |
| 8237 | Context.ShortTy, Context.IntTy, Context.LongTy, Context.LongLongTy |
| 8238 | }; |
| 8239 | QualType UnsignedIntegralTypes[NumTypes] = { |
| 8240 | Context.UnsignedShortTy, Context.UnsignedIntTy, Context.UnsignedLongTy, |
| 8241 | Context.UnsignedLongLongTy |
| 8242 | }; |
| 8243 | |
| 8244 | unsigned BitWidth = Context.getTypeSize(T); |
| 8245 | QualType *Types = T->isSignedIntegerType()? SignedIntegralTypes |
| 8246 | : UnsignedIntegralTypes; |
| 8247 | for (unsigned I = 0; I != NumTypes; ++I) |
| 8248 | if (Context.getTypeSize(Types[I]) > BitWidth) |
| 8249 | return Types[I]; |
| 8250 | |
| 8251 | return QualType(); |
| 8252 | } |
| 8253 | |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 8254 | EnumConstantDecl *Sema::CheckEnumConstant(EnumDecl *Enum, |
| 8255 | EnumConstantDecl *LastEnumConst, |
| 8256 | SourceLocation IdLoc, |
| 8257 | IdentifierInfo *Id, |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 8258 | Expr *Val) { |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 8259 | unsigned IntWidth = Context.Target.getIntWidth(); |
| 8260 | llvm::APSInt EnumVal(IntWidth); |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 8261 | QualType EltTy; |
Douglas Gregor | 0c9e479 | 2010-12-16 00:24:44 +0000 | [diff] [blame] | 8262 | |
| 8263 | if (Val && DiagnoseUnexpandedParameterPack(Val, UPPC_EnumeratorValue)) |
| 8264 | Val = 0; |
| 8265 | |
Douglas Gregor | 4912c34 | 2009-11-06 00:03:12 +0000 | [diff] [blame] | 8266 | if (Val) { |
Douglas Gregor | 9b9edd6 | 2010-03-02 17:53:14 +0000 | [diff] [blame] | 8267 | if (Enum->isDependentType() || Val->isTypeDependent()) |
Douglas Gregor | 4912c34 | 2009-11-06 00:03:12 +0000 | [diff] [blame] | 8268 | EltTy = Context.DependentTy; |
| 8269 | else { |
Douglas Gregor | 4912c34 | 2009-11-06 00:03:12 +0000 | [diff] [blame] | 8270 | // C99 6.7.2.2p2: Make sure we have an integer constant expression. |
| 8271 | SourceLocation ExpLoc; |
Douglas Gregor | 9b9edd6 | 2010-03-02 17:53:14 +0000 | [diff] [blame] | 8272 | if (!Val->isValueDependent() && |
| 8273 | VerifyIntegerConstantExpression(Val, &EnumVal)) { |
Douglas Gregor | 4912c34 | 2009-11-06 00:03:12 +0000 | [diff] [blame] | 8274 | Val = 0; |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 8275 | } else { |
| 8276 | if (!getLangOptions().CPlusPlus) { |
| 8277 | // C99 6.7.2.2p2: |
| 8278 | // The expression that defines the value of an enumeration constant |
| 8279 | // shall be an integer constant expression that has a value |
| 8280 | // representable as an int. |
| 8281 | |
| 8282 | // Complain if the value is not representable in an int. |
| 8283 | if (!isRepresentableIntegerValue(Context, EnumVal, Context.IntTy)) |
| 8284 | Diag(IdLoc, diag::ext_enum_value_not_int) |
| 8285 | << EnumVal.toString(10) << Val->getSourceRange() |
Douglas Gregor | 19c1525 | 2010-02-17 22:40:11 +0000 | [diff] [blame] | 8286 | << (EnumVal.isUnsigned() || EnumVal.isNonNegative()); |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 8287 | else if (!Context.hasSameType(Val->getType(), Context.IntTy)) { |
| 8288 | // Force the type of the expression to 'int'. |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 8289 | Val = ImpCastExprToType(Val, Context.IntTy, CK_IntegralCast).take(); |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 8290 | } |
| 8291 | } |
| 8292 | |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 8293 | if (Enum->isFixed()) { |
| 8294 | EltTy = Enum->getIntegerType(); |
| 8295 | |
| 8296 | // C++0x [dcl.enum]p5: |
| 8297 | // ... if the initializing value of an enumerator cannot be |
| 8298 | // represented by the underlying type, the program is ill-formed. |
Francois Pichet | 842e7a2 | 2010-10-18 15:01:13 +0000 | [diff] [blame] | 8299 | if (!isRepresentableIntegerValue(Context, EnumVal, EltTy)) { |
| 8300 | if (getLangOptions().Microsoft) { |
| 8301 | Diag(IdLoc, diag::ext_enumerator_too_large) << EltTy; |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 8302 | Val = ImpCastExprToType(Val, EltTy, CK_IntegralCast).take(); |
Francois Pichet | 842e7a2 | 2010-10-18 15:01:13 +0000 | [diff] [blame] | 8303 | } else |
| 8304 | Diag(IdLoc, diag::err_enumerator_too_large) |
| 8305 | << EltTy; |
| 8306 | } else |
John Wiegley | 429bb27 | 2011-04-08 18:41:53 +0000 | [diff] [blame] | 8307 | Val = ImpCastExprToType(Val, EltTy, CK_IntegralCast).take(); |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 8308 | } |
| 8309 | else { |
| 8310 | // C++0x [dcl.enum]p5: |
| 8311 | // If the underlying type is not fixed, the type of each enumerator |
| 8312 | // is the type of its initializing value: |
| 8313 | // - If an initializer is specified for an enumerator, the |
| 8314 | // initializing value has the same type as the expression. |
| 8315 | EltTy = Val->getType(); |
| 8316 | } |
Douglas Gregor | 4912c34 | 2009-11-06 00:03:12 +0000 | [diff] [blame] | 8317 | } |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 8318 | } |
| 8319 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8320 | |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 8321 | if (!Val) { |
Eli Friedman | ed0716b | 2009-12-11 01:34:50 +0000 | [diff] [blame] | 8322 | if (Enum->isDependentType()) |
| 8323 | EltTy = Context.DependentTy; |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 8324 | else if (!LastEnumConst) { |
| 8325 | // C++0x [dcl.enum]p5: |
| 8326 | // If the underlying type is not fixed, the type of each enumerator |
| 8327 | // is the type of its initializing value: |
| 8328 | // - If no initializer is specified for the first enumerator, the |
| 8329 | // initializing value has an unspecified integral type. |
| 8330 | // |
| 8331 | // GCC uses 'int' for its unspecified integral type, as does |
| 8332 | // C99 6.7.2.2p3. |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 8333 | if (Enum->isFixed()) { |
| 8334 | EltTy = Enum->getIntegerType(); |
| 8335 | } |
| 8336 | else { |
| 8337 | EltTy = Context.IntTy; |
| 8338 | } |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 8339 | } else { |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 8340 | // Assign the last value + 1. |
| 8341 | EnumVal = LastEnumConst->getInitVal(); |
| 8342 | ++EnumVal; |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 8343 | EltTy = LastEnumConst->getType(); |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 8344 | |
| 8345 | // Check for overflow on increment. |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 8346 | if (EnumVal < LastEnumConst->getInitVal()) { |
| 8347 | // C++0x [dcl.enum]p5: |
| 8348 | // If the underlying type is not fixed, the type of each enumerator |
| 8349 | // is the type of its initializing value: |
| 8350 | // |
| 8351 | // - Otherwise the type of the initializing value is the same as |
| 8352 | // the type of the initializing value of the preceding enumerator |
| 8353 | // unless the incremented value is not representable in that type, |
| 8354 | // in which case the type is an unspecified integral type |
| 8355 | // sufficient to contain the incremented value. If no such type |
| 8356 | // exists, the program is ill-formed. |
| 8357 | QualType T = getNextLargerIntegralType(Context, EltTy); |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 8358 | if (T.isNull() || Enum->isFixed()) { |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 8359 | // There is no integral type larger enough to represent this |
| 8360 | // value. Complain, then allow the value to wrap around. |
| 8361 | EnumVal = LastEnumConst->getInitVal(); |
Jay Foad | 9f71a8f | 2010-12-07 08:25:34 +0000 | [diff] [blame] | 8362 | EnumVal = EnumVal.zext(EnumVal.getBitWidth() * 2); |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 8363 | ++EnumVal; |
| 8364 | if (Enum->isFixed()) |
| 8365 | // When the underlying type is fixed, this is ill-formed. |
| 8366 | Diag(IdLoc, diag::err_enumerator_wrapped) |
| 8367 | << EnumVal.toString(10) |
| 8368 | << EltTy; |
| 8369 | else |
| 8370 | Diag(IdLoc, diag::warn_enumerator_too_large) |
| 8371 | << EnumVal.toString(10); |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 8372 | } else { |
| 8373 | EltTy = T; |
| 8374 | } |
| 8375 | |
| 8376 | // Retrieve the last enumerator's value, extent that type to the |
| 8377 | // type that is supposed to be large enough to represent the incremented |
| 8378 | // value, then increment. |
| 8379 | EnumVal = LastEnumConst->getInitVal(); |
| 8380 | EnumVal.setIsSigned(EltTy->isSignedIntegerType()); |
Jay Foad | 9f71a8f | 2010-12-07 08:25:34 +0000 | [diff] [blame] | 8381 | EnumVal = EnumVal.zextOrTrunc(Context.getIntWidth(EltTy)); |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 8382 | ++EnumVal; |
| 8383 | |
| 8384 | // If we're not in C++, diagnose the overflow of enumerator values, |
| 8385 | // which in C99 means that the enumerator value is not representable in |
| 8386 | // an int (C99 6.7.2.2p2). However, we support GCC's extension that |
| 8387 | // permits enumerator values that are representable in some larger |
| 8388 | // integral type. |
| 8389 | if (!getLangOptions().CPlusPlus && !T.isNull()) |
| 8390 | Diag(IdLoc, diag::warn_enum_value_overflow); |
| 8391 | } else if (!getLangOptions().CPlusPlus && |
| 8392 | !isRepresentableIntegerValue(Context, EnumVal, EltTy)) { |
| 8393 | // Enforce C99 6.7.2.2p2 even when we compute the next value. |
| 8394 | Diag(IdLoc, diag::ext_enum_value_not_int) |
| 8395 | << EnumVal.toString(10) << 1; |
| 8396 | } |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 8397 | } |
| 8398 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8399 | |
Douglas Gregor | 9b9edd6 | 2010-03-02 17:53:14 +0000 | [diff] [blame] | 8400 | if (!EltTy->isDependentType()) { |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 8401 | // Make the enumerator value match the signedness and size of the |
| 8402 | // enumerator's type. |
Jay Foad | 9f71a8f | 2010-12-07 08:25:34 +0000 | [diff] [blame] | 8403 | EnumVal = EnumVal.zextOrTrunc(Context.getIntWidth(EltTy)); |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 8404 | EnumVal.setIsSigned(EltTy->isSignedIntegerType()); |
| 8405 | } |
Douglas Gregor | 4912c34 | 2009-11-06 00:03:12 +0000 | [diff] [blame] | 8406 | |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 8407 | return EnumConstantDecl::Create(Context, Enum, IdLoc, Id, EltTy, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8408 | Val, EnumVal); |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 8409 | } |
| 8410 | |
| 8411 | |
John McCall | 5b629aa | 2010-10-22 23:36:17 +0000 | [diff] [blame] | 8412 | Decl *Sema::ActOnEnumConstant(Scope *S, Decl *theEnumDecl, Decl *lastEnumConst, |
| 8413 | SourceLocation IdLoc, IdentifierInfo *Id, |
| 8414 | AttributeList *Attr, |
| 8415 | SourceLocation EqualLoc, ExprTy *val) { |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 8416 | EnumDecl *TheEnumDecl = cast<EnumDecl>(theEnumDecl); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8417 | EnumConstantDecl *LastEnumConst = |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 8418 | cast_or_null<EnumConstantDecl>(lastEnumConst); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8419 | Expr *Val = static_cast<Expr*>(val); |
| 8420 | |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 8421 | // The scope passed in may not be a decl scope. Zip up the scope tree until |
| 8422 | // we find one that is. |
Douglas Gregor | 1a0d31a | 2009-01-12 18:45:55 +0000 | [diff] [blame] | 8423 | S = getNonFieldDeclScope(S); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8424 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8425 | // Verify that there isn't already something declared with this name in this |
| 8426 | // scope. |
Douglas Gregor | c83c687 | 2010-04-15 22:33:43 +0000 | [diff] [blame] | 8427 | NamedDecl *PrevDecl = LookupSingleName(S, Id, IdLoc, LookupOrdinaryName, |
Douglas Gregor | e39fe72 | 2010-01-19 06:06:57 +0000 | [diff] [blame] | 8428 | ForRedeclaration); |
Douglas Gregor | f57172b | 2008-12-08 18:40:42 +0000 | [diff] [blame] | 8429 | if (PrevDecl && PrevDecl->isTemplateParameter()) { |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 8430 | // Maybe we will complain about the shadowed template parameter. |
| 8431 | DiagnoseTemplateParameterShadow(IdLoc, PrevDecl); |
| 8432 | // Just pretend that we didn't see the previous declaration. |
| 8433 | PrevDecl = 0; |
| 8434 | } |
| 8435 | |
| 8436 | if (PrevDecl) { |
Argyrios Kyrtzidis | 0ff12f0 | 2008-07-16 21:01:53 +0000 | [diff] [blame] | 8437 | // When in C++, we may get a TagDecl with the same name; in this case the |
| 8438 | // enum constant will 'hide' the tag. |
| 8439 | assert((getLangOptions().CPlusPlus || !isa<TagDecl>(PrevDecl)) && |
| 8440 | "Received TagDecl when not in C++!"); |
Argyrios Kyrtzidis | 15a12d0 | 2008-09-09 21:18:04 +0000 | [diff] [blame] | 8441 | if (!isa<TagDecl>(PrevDecl) && isDeclInScope(PrevDecl, CurContext, S)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8442 | if (isa<EnumConstantDecl>(PrevDecl)) |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 8443 | Diag(IdLoc, diag::err_redefinition_of_enumerator) << Id; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8444 | else |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 8445 | Diag(IdLoc, diag::err_redefinition) << Id; |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 8446 | Diag(PrevDecl->getLocation(), diag::note_previous_definition); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 8447 | return 0; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8448 | } |
| 8449 | } |
| 8450 | |
Douglas Gregor | a6e937c | 2010-10-15 13:21:21 +0000 | [diff] [blame] | 8451 | // C++ [class.mem]p13: |
| 8452 | // If T is the name of a class, then each of the following shall have a |
| 8453 | // name different from T: |
| 8454 | // - every enumerator of every member of class T that is an enumerated |
| 8455 | // type |
| 8456 | if (CXXRecordDecl *Record |
| 8457 | = dyn_cast<CXXRecordDecl>( |
| 8458 | TheEnumDecl->getDeclContext()->getRedeclContext())) |
| 8459 | if (Record->getIdentifier() && Record->getIdentifier() == Id) |
| 8460 | Diag(IdLoc, diag::err_member_name_of_class) << Id; |
| 8461 | |
John McCall | 5b629aa | 2010-10-22 23:36:17 +0000 | [diff] [blame] | 8462 | EnumConstantDecl *New = |
| 8463 | CheckEnumConstant(TheEnumDecl, LastEnumConst, IdLoc, Id, Val); |
Chris Lattner | 421a23d | 2007-08-27 21:16:18 +0000 | [diff] [blame] | 8464 | |
John McCall | 92f8831 | 2010-01-23 00:46:32 +0000 | [diff] [blame] | 8465 | if (New) { |
John McCall | 5b629aa | 2010-10-22 23:36:17 +0000 | [diff] [blame] | 8466 | // Process attributes. |
| 8467 | if (Attr) ProcessDeclAttributeList(S, New, Attr); |
| 8468 | |
| 8469 | // Register this decl in the current scope stack. |
John McCall | 92f8831 | 2010-01-23 00:46:32 +0000 | [diff] [blame] | 8470 | New->setAccess(TheEnumDecl->getAccess()); |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 8471 | PushOnScopeChains(New, S); |
John McCall | 92f8831 | 2010-01-23 00:46:32 +0000 | [diff] [blame] | 8472 | } |
Douglas Gregor | 45579f5 | 2008-12-17 02:04:30 +0000 | [diff] [blame] | 8473 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 8474 | return New; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8475 | } |
| 8476 | |
Mike Stump | c6e35aa | 2009-05-16 07:06:02 +0000 | [diff] [blame] | 8477 | void Sema::ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 8478 | SourceLocation RBraceLoc, Decl *EnumDeclX, |
| 8479 | Decl **Elements, unsigned NumElements, |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 8480 | Scope *S, AttributeList *Attr) { |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 8481 | EnumDecl *Enum = cast<EnumDecl>(EnumDeclX); |
Douglas Gregor | 074149e | 2009-01-05 19:45:36 +0000 | [diff] [blame] | 8482 | QualType EnumType = Context.getTypeDeclType(Enum); |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 8483 | |
| 8484 | if (Attr) |
| 8485 | ProcessDeclAttributeList(S, Enum, Attr); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8486 | |
Eli Friedman | ed0716b | 2009-12-11 01:34:50 +0000 | [diff] [blame] | 8487 | if (Enum->isDependentType()) { |
| 8488 | for (unsigned i = 0; i != NumElements; ++i) { |
| 8489 | EnumConstantDecl *ECD = |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 8490 | cast_or_null<EnumConstantDecl>(Elements[i]); |
Eli Friedman | ed0716b | 2009-12-11 01:34:50 +0000 | [diff] [blame] | 8491 | if (!ECD) continue; |
| 8492 | |
| 8493 | ECD->setType(EnumType); |
| 8494 | } |
| 8495 | |
John McCall | 1b5a618 | 2010-05-06 08:49:23 +0000 | [diff] [blame] | 8496 | Enum->completeDefinition(Context.DependentTy, Context.DependentTy, 0, 0); |
Eli Friedman | ed0716b | 2009-12-11 01:34:50 +0000 | [diff] [blame] | 8497 | return; |
| 8498 | } |
| 8499 | |
Chris Lattner | e37f0be | 2007-08-28 05:10:31 +0000 | [diff] [blame] | 8500 | // TODO: If the result value doesn't fit in an int, it must be a long or long |
| 8501 | // long value. ISO C does not support this, but GCC does as an extension, |
| 8502 | // emit a warning. |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 8503 | unsigned IntWidth = Context.Target.getIntWidth(); |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 8504 | unsigned CharWidth = Context.Target.getCharWidth(); |
| 8505 | unsigned ShortWidth = Context.Target.getShortWidth(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8506 | |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 8507 | // Verify that all the values are okay, compute the size of the values, and |
| 8508 | // reverse the list. |
| 8509 | unsigned NumNegativeBits = 0; |
| 8510 | unsigned NumPositiveBits = 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8511 | |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 8512 | // Keep track of whether all elements have type int. |
| 8513 | bool AllElementsInt = true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8514 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8515 | for (unsigned i = 0; i != NumElements; ++i) { |
| 8516 | EnumConstantDecl *ECD = |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 8517 | cast_or_null<EnumConstantDecl>(Elements[i]); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8518 | if (!ECD) continue; // Already issued a diagnostic. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8519 | |
Chris Lattner | 211a30e | 2007-08-28 05:27:00 +0000 | [diff] [blame] | 8520 | const llvm::APSInt &InitVal = ECD->getInitVal(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8521 | |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 8522 | // Keep track of the size of positive and negative values. |
Chris Lattner | a73349d | 2008-02-26 00:33:57 +0000 | [diff] [blame] | 8523 | if (InitVal.isUnsigned() || InitVal.isNonNegative()) |
Chris Lattner | 21dd821 | 2008-01-14 21:47:29 +0000 | [diff] [blame] | 8524 | NumPositiveBits = std::max(NumPositiveBits, |
| 8525 | (unsigned)InitVal.getActiveBits()); |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 8526 | else |
Chris Lattner | 21dd821 | 2008-01-14 21:47:29 +0000 | [diff] [blame] | 8527 | NumNegativeBits = std::max(NumNegativeBits, |
| 8528 | (unsigned)InitVal.getMinSignedBits()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8529 | |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 8530 | // Keep track of whether every enum element has type int (very commmon). |
| 8531 | if (AllElementsInt) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8532 | AllElementsInt = ECD->getType() == Context.IntTy; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8533 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8534 | |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 8535 | // Figure out the type that should be used for this enum. |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 8536 | QualType BestType; |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8537 | unsigned BestWidth; |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 8538 | |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 8539 | // C++0x N3000 [conv.prom]p3: |
| 8540 | // An rvalue of an unscoped enumeration type whose underlying |
| 8541 | // type is not fixed can be converted to an rvalue of the first |
| 8542 | // of the following types that can represent all the values of |
| 8543 | // the enumeration: int, unsigned int, long int, unsigned long |
| 8544 | // int, long long int, or unsigned long long int. |
| 8545 | // C99 6.4.4.3p2: |
| 8546 | // An identifier declared as an enumeration constant has type int. |
| 8547 | // The C99 rule is modified by a gcc extension |
| 8548 | QualType BestPromotionType; |
| 8549 | |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 8550 | bool Packed = Enum->getAttr<PackedAttr>() ? true : false; |
Argyrios Kyrtzidis | 9a2b9d7 | 2010-10-08 00:25:19 +0000 | [diff] [blame] | 8551 | // -fshort-enums is the equivalent to specifying the packed attribute on all |
| 8552 | // enum definitions. |
| 8553 | if (LangOpts.ShortEnums) |
| 8554 | Packed = true; |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 8555 | |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 8556 | if (Enum->isFixed()) { |
| 8557 | BestType = BestPromotionType = Enum->getIntegerType(); |
Duncan Sands | 240a020 | 2010-10-12 14:07:59 +0000 | [diff] [blame] | 8558 | // We don't need to set BestWidth, because BestType is going to be the type |
| 8559 | // of the enumerators, but we do anyway because otherwise some compilers |
| 8560 | // warn that it might be used uninitialized. |
| 8561 | BestWidth = CharWidth; |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 8562 | } |
| 8563 | else if (NumNegativeBits) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8564 | // If there is a negative value, figure out the smallest integer type (of |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 8565 | // int/long/longlong) that fits. |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 8566 | // If it's packed, check also if it fits a char or a short. |
| 8567 | if (Packed && NumNegativeBits <= CharWidth && NumPositiveBits < CharWidth) { |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 8568 | BestType = Context.SignedCharTy; |
| 8569 | BestWidth = CharWidth; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8570 | } else if (Packed && NumNegativeBits <= ShortWidth && |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 8571 | NumPositiveBits < ShortWidth) { |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 8572 | BestType = Context.ShortTy; |
| 8573 | BestWidth = ShortWidth; |
| 8574 | } else if (NumNegativeBits <= IntWidth && NumPositiveBits < IntWidth) { |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 8575 | BestType = Context.IntTy; |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8576 | BestWidth = IntWidth; |
| 8577 | } else { |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 8578 | BestWidth = Context.Target.getLongWidth(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8579 | |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 8580 | if (NumNegativeBits <= BestWidth && NumPositiveBits < BestWidth) { |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 8581 | BestType = Context.LongTy; |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 8582 | } else { |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 8583 | BestWidth = Context.Target.getLongLongWidth(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8584 | |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8585 | if (NumNegativeBits > BestWidth || NumPositiveBits >= BestWidth) |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 8586 | Diag(Enum->getLocation(), diag::warn_enum_too_large); |
| 8587 | BestType = Context.LongLongTy; |
| 8588 | } |
| 8589 | } |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 8590 | BestPromotionType = (BestWidth <= IntWidth ? Context.IntTy : BestType); |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 8591 | } else { |
Douglas Gregor | aa74a1e | 2010-02-02 20:10:50 +0000 | [diff] [blame] | 8592 | // If there is no negative value, figure out the smallest type that fits |
| 8593 | // all of the enumerator values. |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 8594 | // If it's packed, check also if it fits a char or a short. |
| 8595 | if (Packed && NumPositiveBits <= CharWidth) { |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 8596 | BestType = Context.UnsignedCharTy; |
| 8597 | BestPromotionType = Context.IntTy; |
| 8598 | BestWidth = CharWidth; |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 8599 | } else if (Packed && NumPositiveBits <= ShortWidth) { |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 8600 | BestType = Context.UnsignedShortTy; |
| 8601 | BestPromotionType = Context.IntTy; |
| 8602 | BestWidth = ShortWidth; |
| 8603 | } else if (NumPositiveBits <= IntWidth) { |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 8604 | BestType = Context.UnsignedIntTy; |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8605 | BestWidth = IntWidth; |
Douglas Gregor | aa74a1e | 2010-02-02 20:10:50 +0000 | [diff] [blame] | 8606 | BestPromotionType |
| 8607 | = (NumPositiveBits == BestWidth || !getLangOptions().CPlusPlus) |
| 8608 | ? Context.UnsignedIntTy : Context.IntTy; |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8609 | } else if (NumPositiveBits <= |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 8610 | (BestWidth = Context.Target.getLongWidth())) { |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 8611 | BestType = Context.UnsignedLongTy; |
Douglas Gregor | aa74a1e | 2010-02-02 20:10:50 +0000 | [diff] [blame] | 8612 | BestPromotionType |
| 8613 | = (NumPositiveBits == BestWidth || !getLangOptions().CPlusPlus) |
| 8614 | ? Context.UnsignedLongTy : Context.LongTy; |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 8615 | } else { |
| 8616 | BestWidth = Context.Target.getLongLongWidth(); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8617 | assert(NumPositiveBits <= BestWidth && |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 8618 | "How could an initializer get larger than ULL?"); |
| 8619 | BestType = Context.UnsignedLongLongTy; |
Douglas Gregor | aa74a1e | 2010-02-02 20:10:50 +0000 | [diff] [blame] | 8620 | BestPromotionType |
| 8621 | = (NumPositiveBits == BestWidth || !getLangOptions().CPlusPlus) |
| 8622 | ? Context.UnsignedLongLongTy : Context.LongLongTy; |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 8623 | } |
| 8624 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8625 | |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8626 | // Loop over all of the enumerator constants, changing their types to match |
| 8627 | // the type of the enum if needed. |
| 8628 | for (unsigned i = 0; i != NumElements; ++i) { |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 8629 | EnumConstantDecl *ECD = cast_or_null<EnumConstantDecl>(Elements[i]); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8630 | if (!ECD) continue; // Already issued a diagnostic. |
| 8631 | |
| 8632 | // Standard C says the enumerators have int type, but we allow, as an |
| 8633 | // extension, the enumerators to be larger than int size. If each |
| 8634 | // enumerator value fits in an int, type it as an int, otherwise type it the |
| 8635 | // same as the enumerator decl itself. This means that in "enum { X = 1U }" |
| 8636 | // that X has type 'int', not 'unsigned'. |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8637 | |
| 8638 | // Determine whether the value fits into an int. |
| 8639 | llvm::APSInt InitVal = ECD->getInitVal(); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8640 | |
| 8641 | // If it fits into an integer type, force it. Otherwise force it to match |
| 8642 | // the enum decl type. |
| 8643 | QualType NewTy; |
| 8644 | unsigned NewWidth; |
| 8645 | bool NewSign; |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 8646 | if (!getLangOptions().CPlusPlus && |
| 8647 | isRepresentableIntegerValue(Context, InitVal, Context.IntTy)) { |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8648 | NewTy = Context.IntTy; |
| 8649 | NewWidth = IntWidth; |
| 8650 | NewSign = true; |
| 8651 | } else if (ECD->getType() == BestType) { |
| 8652 | // Already the right type! |
Douglas Gregor | c9467cf | 2008-12-12 02:00:36 +0000 | [diff] [blame] | 8653 | if (getLangOptions().CPlusPlus) |
| 8654 | // C++ [dcl.enum]p4: Following the closing brace of an |
| 8655 | // enum-specifier, each enumerator has the type of its |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8656 | // enumeration. |
Douglas Gregor | c9467cf | 2008-12-12 02:00:36 +0000 | [diff] [blame] | 8657 | ECD->setType(EnumType); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8658 | continue; |
| 8659 | } else { |
| 8660 | NewTy = BestType; |
| 8661 | NewWidth = BestWidth; |
| 8662 | NewSign = BestType->isSignedIntegerType(); |
| 8663 | } |
| 8664 | |
| 8665 | // Adjust the APSInt value. |
Jay Foad | 9f71a8f | 2010-12-07 08:25:34 +0000 | [diff] [blame] | 8666 | InitVal = InitVal.extOrTrunc(NewWidth); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8667 | InitVal.setIsSigned(NewSign); |
| 8668 | ECD->setInitVal(InitVal); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8669 | |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8670 | // Adjust the Expr initializer and type. |
Abramo Bagnara | 320e153 | 2010-12-17 15:49:53 +0000 | [diff] [blame] | 8671 | if (ECD->getInitExpr() && |
| 8672 | !Context.hasSameType(NewTy, ECD->getInitExpr()->getType())) |
John McCall | f871d0c | 2010-08-07 06:22:56 +0000 | [diff] [blame] | 8673 | ECD->setInitExpr(ImplicitCastExpr::Create(Context, NewTy, |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 8674 | CK_IntegralCast, |
John McCall | f871d0c | 2010-08-07 06:22:56 +0000 | [diff] [blame] | 8675 | ECD->getInitExpr(), |
| 8676 | /*base paths*/ 0, |
John McCall | 5baba9d | 2010-08-25 10:28:54 +0000 | [diff] [blame] | 8677 | VK_RValue)); |
Douglas Gregor | c9467cf | 2008-12-12 02:00:36 +0000 | [diff] [blame] | 8678 | if (getLangOptions().CPlusPlus) |
| 8679 | // C++ [dcl.enum]p4: Following the closing brace of an |
| 8680 | // enum-specifier, each enumerator has the type of its |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8681 | // enumeration. |
Douglas Gregor | c9467cf | 2008-12-12 02:00:36 +0000 | [diff] [blame] | 8682 | ECD->setType(EnumType); |
| 8683 | else |
| 8684 | ECD->setType(NewTy); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8685 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8686 | |
John McCall | 1b5a618 | 2010-05-06 08:49:23 +0000 | [diff] [blame] | 8687 | Enum->completeDefinition(BestType, BestPromotionType, |
| 8688 | NumPositiveBits, NumNegativeBits); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8689 | } |
| 8690 | |
Abramo Bagnara | 21e006e | 2011-03-03 14:20:18 +0000 | [diff] [blame] | 8691 | Decl *Sema::ActOnFileScopeAsmDecl(Expr *expr, |
| 8692 | SourceLocation StartLoc, |
| 8693 | SourceLocation EndLoc) { |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 8694 | StringLiteral *AsmString = cast<StringLiteral>(expr); |
Sebastian Redl | 798d119 | 2008-12-13 16:23:55 +0000 | [diff] [blame] | 8695 | |
Douglas Gregor | 4fe0c8e | 2009-05-30 00:08:05 +0000 | [diff] [blame] | 8696 | FileScopeAsmDecl *New = FileScopeAsmDecl::Create(Context, CurContext, |
Abramo Bagnara | 21e006e | 2011-03-03 14:20:18 +0000 | [diff] [blame] | 8697 | AsmString, StartLoc, |
| 8698 | EndLoc); |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 8699 | CurContext->addDecl(New); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 8700 | return New; |
Anders Carlsson | dfab6cb | 2008-02-08 00:33:21 +0000 | [diff] [blame] | 8701 | } |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 8702 | |
| 8703 | void Sema::ActOnPragmaWeakID(IdentifierInfo* Name, |
| 8704 | SourceLocation PragmaLoc, |
| 8705 | SourceLocation NameLoc) { |
Douglas Gregor | c83c687 | 2010-04-15 22:33:43 +0000 | [diff] [blame] | 8706 | Decl *PrevDecl = LookupSingleName(TUScope, Name, NameLoc, LookupOrdinaryName); |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 8707 | |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 8708 | if (PrevDecl) { |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 8709 | PrevDecl->addAttr(::new (Context) WeakAttr(PragmaLoc, Context)); |
Ryan Flynn | e25ff83 | 2009-07-30 03:15:39 +0000 | [diff] [blame] | 8710 | } else { |
| 8711 | (void)WeakUndeclaredIdentifiers.insert( |
| 8712 | std::pair<IdentifierInfo*,WeakInfo> |
| 8713 | (Name, WeakInfo((IdentifierInfo*)0, NameLoc))); |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 8714 | } |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 8715 | } |
| 8716 | |
| 8717 | void Sema::ActOnPragmaWeakAlias(IdentifierInfo* Name, |
| 8718 | IdentifierInfo* AliasName, |
| 8719 | SourceLocation PragmaLoc, |
| 8720 | SourceLocation NameLoc, |
| 8721 | SourceLocation AliasNameLoc) { |
Douglas Gregor | c83c687 | 2010-04-15 22:33:43 +0000 | [diff] [blame] | 8722 | Decl *PrevDecl = LookupSingleName(TUScope, AliasName, AliasNameLoc, |
| 8723 | LookupOrdinaryName); |
Ryan Flynn | e25ff83 | 2009-07-30 03:15:39 +0000 | [diff] [blame] | 8724 | WeakInfo W = WeakInfo(Name, NameLoc); |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 8725 | |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 8726 | if (PrevDecl) { |
Ryan Flynn | e25ff83 | 2009-07-30 03:15:39 +0000 | [diff] [blame] | 8727 | if (!PrevDecl->hasAttr<AliasAttr>()) |
| 8728 | if (NamedDecl *ND = dyn_cast<NamedDecl>(PrevDecl)) |
Ryan Flynn | 7b1fdbd | 2009-07-31 02:52:19 +0000 | [diff] [blame] | 8729 | DeclApplyPragmaWeak(TUScope, ND, W); |
Ryan Flynn | e25ff83 | 2009-07-30 03:15:39 +0000 | [diff] [blame] | 8730 | } else { |
| 8731 | (void)WeakUndeclaredIdentifiers.insert( |
| 8732 | std::pair<IdentifierInfo*,WeakInfo>(AliasName, W)); |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 8733 | } |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 8734 | } |