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" |
Chris Lattner | 6b6b537 | 2008-06-26 18:38:35 +0000 | [diff] [blame] | 28 | #include "clang/AST/ExprCXX.h" |
Sebastian Redl | d3a413d | 2009-04-26 20:35:05 +0000 | [diff] [blame] | 29 | #include "clang/AST/StmtCXX.h" |
Argyrios Kyrtzidis | 3532fdd | 2010-11-17 23:11:54 +0000 | [diff] [blame] | 30 | #include "clang/AST/CharUnits.h" |
John McCall | 1951085 | 2010-08-20 18:27:03 +0000 | [diff] [blame] | 31 | #include "clang/Sema/DeclSpec.h" |
| 32 | #include "clang/Sema/ParsedTemplate.h" |
Douglas Gregor | a786fdb | 2009-10-13 23:27:22 +0000 | [diff] [blame] | 33 | #include "clang/Parse/ParseDiagnostic.h" |
Anders Carlsson | b790661 | 2009-08-26 23:45:07 +0000 | [diff] [blame] | 34 | #include "clang/Basic/PartialDiagnostic.h" |
Steve Naroff | 4c49a6c | 2008-01-30 23:46:05 +0000 | [diff] [blame] | 35 | #include "clang/Basic/SourceManager.h" |
Anders Carlsson | b790661 | 2009-08-26 23:45:07 +0000 | [diff] [blame] | 36 | #include "clang/Basic/TargetInfo.h" |
Steve Naroff | 4c49a6c | 2008-01-30 23:46:05 +0000 | [diff] [blame] | 37 | // FIXME: layering (ideally, Sema shouldn't be dependent on Lex API's) |
Chris Lattner | e1e7985 | 2008-02-06 00:51:33 +0000 | [diff] [blame] | 38 | #include "clang/Lex/Preprocessor.h" |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 39 | #include "clang/Lex/HeaderSearch.h" |
John McCall | 6675586 | 2009-12-24 09:58:38 +0000 | [diff] [blame] | 40 | #include "llvm/ADT/Triple.h" |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 41 | #include <algorithm> |
Douglas Gregor | 9a8c9a2 | 2009-09-28 21:14:19 +0000 | [diff] [blame] | 42 | #include <cstring> |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 43 | #include <functional> |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 44 | using namespace clang; |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 45 | using namespace sema; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 46 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 47 | Sema::DeclGroupPtrTy Sema::ConvertDeclToDeclGroup(Decl *Ptr) { |
| 48 | return DeclGroupPtrTy::make(DeclGroupRef(Ptr)); |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 49 | } |
| 50 | |
Douglas Gregor | d6efafa | 2009-02-04 19:16:12 +0000 | [diff] [blame] | 51 | /// \brief If the identifier refers to a type name within this scope, |
| 52 | /// return the declaration of that type. |
| 53 | /// |
| 54 | /// This routine performs ordinary name lookup of the identifier II |
| 55 | /// within the given scope, with optional C++ scope specifier SS, to |
Douglas Gregor | 1a51b4a | 2009-02-09 15:09:02 +0000 | [diff] [blame] | 56 | /// determine whether the name refers to a type. If so, returns an |
| 57 | /// opaque pointer (actually a QualType) corresponding to that |
| 58 | /// type. Otherwise, returns NULL. |
Douglas Gregor | d6efafa | 2009-02-04 19:16:12 +0000 | [diff] [blame] | 59 | /// |
| 60 | /// If name lookup results in an ambiguity, this routine will complain |
| 61 | /// and then return NULL. |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 62 | ParsedType Sema::getTypeName(IdentifierInfo &II, SourceLocation NameLoc, |
| 63 | Scope *S, CXXScopeSpec *SS, |
Fariborz Jahanian | 1e52dfc | 2011-02-08 18:05:59 +0000 | [diff] [blame] | 64 | bool isClassName, bool HasTrailingDot, |
Douglas Gregor | 9e87687 | 2011-03-01 18:12:44 +0000 | [diff] [blame] | 65 | ParsedType ObjectTypePtr, |
| 66 | bool WantNontrivialTypeSourceInfo) { |
Douglas Gregor | f6e6fc8 | 2009-11-20 22:03:38 +0000 | [diff] [blame] | 67 | // Determine where we will perform name lookup. |
| 68 | DeclContext *LookupCtx = 0; |
| 69 | if (ObjectTypePtr) { |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 70 | QualType ObjectType = ObjectTypePtr.get(); |
Douglas Gregor | f6e6fc8 | 2009-11-20 22:03:38 +0000 | [diff] [blame] | 71 | if (ObjectType->isRecordType()) |
| 72 | LookupCtx = computeDeclContext(ObjectType); |
Jeffrey Yasskin | edc2877 | 2010-04-07 23:29:58 +0000 | [diff] [blame] | 73 | } else if (SS && SS->isNotEmpty()) { |
Douglas Gregor | f6e6fc8 | 2009-11-20 22:03:38 +0000 | [diff] [blame] | 74 | LookupCtx = computeDeclContext(*SS, false); |
| 75 | |
| 76 | if (!LookupCtx) { |
| 77 | if (isDependentScopeSpecifier(*SS)) { |
| 78 | // C++ [temp.res]p3: |
| 79 | // A qualified-id that refers to a type and in which the |
| 80 | // nested-name-specifier depends on a template-parameter (14.6.2) |
| 81 | // shall be prefixed by the keyword typename to indicate that the |
| 82 | // qualified-id denotes a type, forming an |
| 83 | // elaborated-type-specifier (7.1.5.3). |
| 84 | // |
| 85 | // We therefore do not perform any name lookup if the result would |
| 86 | // refer to a member of an unknown specialization. |
| 87 | if (!isClassName) |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 88 | return ParsedType(); |
Douglas Gregor | f6e6fc8 | 2009-11-20 22:03:38 +0000 | [diff] [blame] | 89 | |
John McCall | 3350095 | 2010-06-11 00:33:02 +0000 | [diff] [blame] | 90 | // We know from the grammar that this name refers to a type, |
| 91 | // so build a dependent node to describe the type. |
Douglas Gregor | 9e87687 | 2011-03-01 18:12:44 +0000 | [diff] [blame] | 92 | if (WantNontrivialTypeSourceInfo) |
| 93 | return ActOnTypenameType(S, SourceLocation(), *SS, II, NameLoc).get(); |
| 94 | |
| 95 | NestedNameSpecifierLoc QualifierLoc = SS->getWithLocInContext(Context); |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 96 | QualType T = |
Douglas Gregor | 9e87687 | 2011-03-01 18:12:44 +0000 | [diff] [blame] | 97 | CheckTypenameType(ETK_None, SourceLocation(), QualifierLoc, |
Douglas Gregor | e29425b | 2011-02-28 22:42:13 +0000 | [diff] [blame] | 98 | II, NameLoc); |
Douglas Gregor | 9e87687 | 2011-03-01 18:12:44 +0000 | [diff] [blame] | 99 | |
| 100 | return ParsedType::make(T); |
Douglas Gregor | f6e6fc8 | 2009-11-20 22:03:38 +0000 | [diff] [blame] | 101 | } |
| 102 | |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 103 | return ParsedType(); |
Douglas Gregor | f6e6fc8 | 2009-11-20 22:03:38 +0000 | [diff] [blame] | 104 | } |
| 105 | |
John McCall | 77bb1aa | 2010-05-01 00:40:08 +0000 | [diff] [blame] | 106 | if (!LookupCtx->isDependentContext() && |
| 107 | RequireCompleteDeclContext(*SS, LookupCtx)) |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 108 | return ParsedType(); |
Douglas Gregor | 42c39f3 | 2009-08-26 18:27:52 +0000 | [diff] [blame] | 109 | } |
Eli Friedman | 0f0615b | 2009-12-21 01:42:38 +0000 | [diff] [blame] | 110 | |
| 111 | // FIXME: LookupNestedNameSpecifierName isn't the right kind of |
| 112 | // lookup for class-names. |
| 113 | LookupNameKind Kind = isClassName ? LookupNestedNameSpecifierName : |
| 114 | LookupOrdinaryName; |
| 115 | LookupResult Result(*this, &II, NameLoc, Kind); |
Douglas Gregor | f6e6fc8 | 2009-11-20 22:03:38 +0000 | [diff] [blame] | 116 | if (LookupCtx) { |
| 117 | // Perform "qualified" name lookup into the declaration context we |
| 118 | // computed, which is either the type of the base of a member access |
| 119 | // expression or the declaration context associated with a prior |
| 120 | // nested-name-specifier. |
| 121 | LookupQualifiedName(Result, LookupCtx); |
Douglas Gregor | 42af25f | 2009-05-11 19:58:34 +0000 | [diff] [blame] | 122 | |
Douglas Gregor | f6e6fc8 | 2009-11-20 22:03:38 +0000 | [diff] [blame] | 123 | if (ObjectTypePtr && Result.empty()) { |
| 124 | // C++ [basic.lookup.classref]p3: |
| 125 | // If the unqualified-id is ~type-name, the type-name is looked up |
| 126 | // in the context of the entire postfix-expression. If the type T of |
| 127 | // the object expression is of a class type C, the type-name is also |
| 128 | // looked up in the scope of class C. At least one of the lookups shall |
| 129 | // find a name that refers to (possibly cv-qualified) T. |
| 130 | LookupName(Result, S); |
| 131 | } |
| 132 | } else { |
| 133 | // Perform unqualified name lookup. |
| 134 | LookupName(Result, S); |
| 135 | } |
| 136 | |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 137 | NamedDecl *IIDecl = 0; |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 138 | switch (Result.getResultKind()) { |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 139 | case LookupResult::NotFound: |
Douglas Gregor | 7d3f576 | 2010-01-15 01:44:47 +0000 | [diff] [blame] | 140 | case LookupResult::NotFoundInCurrentInstantiation: |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 141 | case LookupResult::FoundOverloaded: |
John McCall | 7ba107a | 2009-11-18 02:36:19 +0000 | [diff] [blame] | 142 | case LookupResult::FoundUnresolvedValue: |
John McCall | c373d48 | 2010-01-27 01:50:18 +0000 | [diff] [blame] | 143 | Result.suppressDiagnostics(); |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 144 | return ParsedType(); |
Douglas Gregor | b696ea3 | 2009-02-04 17:00:24 +0000 | [diff] [blame] | 145 | |
Chris Lattner | a64ef0a | 2009-10-25 22:09:09 +0000 | [diff] [blame] | 146 | case LookupResult::Ambiguous: |
John McCall | 6e24726 | 2009-10-10 05:48:19 +0000 | [diff] [blame] | 147 | // Recover from type-hiding ambiguities by hiding the type. We'll |
| 148 | // do the lookup again when looking for an object, and we can |
| 149 | // diagnose the error then. If we don't do this, then the error |
| 150 | // about hiding the type will be immediately followed by an error |
| 151 | // that only makes sense if the identifier was treated like a type. |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 152 | if (Result.getAmbiguityKind() == LookupResult::AmbiguousTagHiding) { |
| 153 | Result.suppressDiagnostics(); |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 154 | return ParsedType(); |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 155 | } |
John McCall | 6e24726 | 2009-10-10 05:48:19 +0000 | [diff] [blame] | 156 | |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 157 | // Look to see if we have a type anywhere in the list of results. |
| 158 | for (LookupResult::iterator Res = Result.begin(), ResEnd = Result.end(); |
| 159 | Res != ResEnd; ++Res) { |
| 160 | if (isa<TypeDecl>(*Res) || isa<ObjCInterfaceDecl>(*Res)) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 161 | if (!IIDecl || |
| 162 | (*Res)->getLocation().getRawEncoding() < |
Douglas Gregor | 841b53c | 2009-04-13 15:14:38 +0000 | [diff] [blame] | 163 | IIDecl->getLocation().getRawEncoding()) |
| 164 | IIDecl = *Res; |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 165 | } |
| 166 | } |
| 167 | |
| 168 | if (!IIDecl) { |
| 169 | // None of the entities we found is a type, so there is no way |
| 170 | // to even assume that the result is a type. In this case, don't |
| 171 | // complain about the ambiguity. The parser will either try to |
| 172 | // perform this lookup again (e.g., as an object name), which |
| 173 | // will produce the ambiguity, or will complain that it expected |
| 174 | // a type name. |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 175 | Result.suppressDiagnostics(); |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 176 | return ParsedType(); |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 177 | } |
| 178 | |
| 179 | // We found a type within the ambiguous lookup; diagnose the |
| 180 | // ambiguity and then return that type. This might be the right |
| 181 | // answer, or it might not be, but it suppresses any attempt to |
| 182 | // perform the name lookup again. |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 183 | break; |
Douglas Gregor | b696ea3 | 2009-02-04 17:00:24 +0000 | [diff] [blame] | 184 | |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 185 | case LookupResult::Found: |
John McCall | f36e02d | 2009-10-09 21:13:30 +0000 | [diff] [blame] | 186 | IIDecl = Result.getFoundDecl(); |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 187 | break; |
Douglas Gregor | 7176fff | 2009-01-15 00:26:24 +0000 | [diff] [blame] | 188 | } |
| 189 | |
Chris Lattner | 10ca337 | 2009-10-25 17:16:46 +0000 | [diff] [blame] | 190 | assert(IIDecl && "Didn't find decl"); |
John McCall | 54abf7d | 2009-11-04 02:18:39 +0000 | [diff] [blame] | 191 | |
Chris Lattner | 10ca337 | 2009-10-25 17:16:46 +0000 | [diff] [blame] | 192 | QualType T; |
| 193 | if (TypeDecl *TD = dyn_cast<TypeDecl>(IIDecl)) { |
John McCall | 54abf7d | 2009-11-04 02:18:39 +0000 | [diff] [blame] | 194 | DiagnoseUseOfDecl(IIDecl, NameLoc); |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 195 | |
Chris Lattner | 10ca337 | 2009-10-25 17:16:46 +0000 | [diff] [blame] | 196 | if (T.isNull()) |
| 197 | T = Context.getTypeDeclType(TD); |
| 198 | |
Douglas Gregor | 9e87687 | 2011-03-01 18:12:44 +0000 | [diff] [blame] | 199 | if (SS && SS->isNotEmpty()) { |
| 200 | if (WantNontrivialTypeSourceInfo) { |
| 201 | // Construct a type with type-source information. |
| 202 | TypeLocBuilder Builder; |
| 203 | Builder.pushTypeSpec(T).setNameLoc(NameLoc); |
| 204 | |
| 205 | T = getElaboratedType(ETK_None, *SS, T); |
| 206 | ElaboratedTypeLoc ElabTL = Builder.push<ElaboratedTypeLoc>(T); |
| 207 | ElabTL.setKeywordLoc(SourceLocation()); |
| 208 | ElabTL.setQualifierLoc(SS->getWithLocInContext(Context)); |
| 209 | return CreateParsedType(T, Builder.getTypeSourceInfo(Context, T)); |
| 210 | } else { |
| 211 | T = getElaboratedType(ETK_None, *SS, T); |
| 212 | } |
| 213 | } |
Chris Lattner | 10ca337 | 2009-10-25 17:16:46 +0000 | [diff] [blame] | 214 | } else if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(IIDecl)) { |
Fariborz Jahanian | 02b0d65 | 2011-03-08 19:12:46 +0000 | [diff] [blame] | 215 | (void)DiagnoseUseOfDecl(IDecl, NameLoc); |
Fariborz Jahanian | 1e52dfc | 2011-02-08 18:05:59 +0000 | [diff] [blame] | 216 | if (!HasTrailingDot) |
| 217 | T = Context.getObjCInterfaceType(IDecl); |
| 218 | } |
| 219 | |
| 220 | if (T.isNull()) { |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 221 | // If it's not plausibly a type, suppress diagnostics. |
| 222 | Result.suppressDiagnostics(); |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 223 | return ParsedType(); |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 224 | } |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 225 | return ParsedType::make(T); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 226 | } |
| 227 | |
Chris Lattner | 4c97d76 | 2009-04-12 21:49:30 +0000 | [diff] [blame] | 228 | /// isTagName() - This method is called *for error recovery purposes only* |
| 229 | /// to determine if the specified name is a valid tag name ("struct foo"). If |
| 230 | /// so, this returns the TST for the tag corresponding to it (TST_enum, |
| 231 | /// TST_union, TST_struct, TST_class). This is used to diagnose cases in C |
| 232 | /// where the user forgot to specify the tag. |
| 233 | DeclSpec::TST Sema::isTagName(IdentifierInfo &II, Scope *S) { |
| 234 | // Do a tag name lookup in this scope. |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 235 | LookupResult R(*this, &II, SourceLocation(), LookupTagName); |
| 236 | LookupName(R, S, false); |
| 237 | R.suppressDiagnostics(); |
| 238 | if (R.getResultKind() == LookupResult::Found) |
John McCall | 1bcee0a | 2009-12-02 08:25:40 +0000 | [diff] [blame] | 239 | if (const TagDecl *TD = R.getAsSingle<TagDecl>()) { |
Chris Lattner | 4c97d76 | 2009-04-12 21:49:30 +0000 | [diff] [blame] | 240 | switch (TD->getTagKind()) { |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 241 | default: return DeclSpec::TST_unspecified; |
| 242 | case TTK_Struct: return DeclSpec::TST_struct; |
| 243 | case TTK_Union: return DeclSpec::TST_union; |
| 244 | case TTK_Class: return DeclSpec::TST_class; |
| 245 | case TTK_Enum: return DeclSpec::TST_enum; |
Chris Lattner | 4c97d76 | 2009-04-12 21:49:30 +0000 | [diff] [blame] | 246 | } |
| 247 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 248 | |
Chris Lattner | 4c97d76 | 2009-04-12 21:49:30 +0000 | [diff] [blame] | 249 | return DeclSpec::TST_unspecified; |
| 250 | } |
| 251 | |
Douglas Gregor | a786fdb | 2009-10-13 23:27:22 +0000 | [diff] [blame] | 252 | bool Sema::DiagnoseUnknownTypeName(const IdentifierInfo &II, |
| 253 | SourceLocation IILoc, |
| 254 | Scope *S, |
Jeffrey Yasskin | 9ab1454 | 2010-04-08 16:38:48 +0000 | [diff] [blame] | 255 | CXXScopeSpec *SS, |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 256 | ParsedType &SuggestedType) { |
Douglas Gregor | a786fdb | 2009-10-13 23:27:22 +0000 | [diff] [blame] | 257 | // We don't have anything to suggest (yet). |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 258 | SuggestedType = ParsedType(); |
Douglas Gregor | a786fdb | 2009-10-13 23:27:22 +0000 | [diff] [blame] | 259 | |
Douglas Gregor | 546be3c | 2009-12-30 17:04:44 +0000 | [diff] [blame] | 260 | // There may have been a typo in the name of the type. Look up typo |
| 261 | // results, in case we have something that we can suggest. |
| 262 | LookupResult Lookup(*this, &II, IILoc, LookupOrdinaryName, |
| 263 | NotForRedeclaration); |
| 264 | |
Douglas Gregor | aaf8716 | 2010-04-14 20:04:41 +0000 | [diff] [blame] | 265 | if (DeclarationName Corrected = CorrectTypo(Lookup, S, SS, 0, 0, CTC_Type)) { |
| 266 | if (NamedDecl *Result = Lookup.getAsSingle<NamedDecl>()) { |
| 267 | if ((isa<TypeDecl>(Result) || isa<ObjCInterfaceDecl>(Result)) && |
| 268 | !Result->isInvalidDecl()) { |
| 269 | // We found a similarly-named type or interface; suggest that. |
| 270 | if (!SS || !SS->isSet()) |
| 271 | Diag(IILoc, diag::err_unknown_typename_suggest) |
| 272 | << &II << Lookup.getLookupName() |
| 273 | << FixItHint::CreateReplacement(SourceRange(IILoc), |
| 274 | Result->getNameAsString()); |
| 275 | else if (DeclContext *DC = computeDeclContext(*SS, false)) |
| 276 | Diag(IILoc, diag::err_unknown_nested_typename_suggest) |
| 277 | << &II << DC << Lookup.getLookupName() << SS->getRange() |
| 278 | << FixItHint::CreateReplacement(SourceRange(IILoc), |
| 279 | Result->getNameAsString()); |
| 280 | else |
| 281 | llvm_unreachable("could not have corrected a typo here"); |
Douglas Gregor | 546be3c | 2009-12-30 17:04:44 +0000 | [diff] [blame] | 282 | |
Douglas Gregor | aaf8716 | 2010-04-14 20:04:41 +0000 | [diff] [blame] | 283 | Diag(Result->getLocation(), diag::note_previous_decl) |
| 284 | << Result->getDeclName(); |
| 285 | |
Douglas Gregor | 9e87687 | 2011-03-01 18:12:44 +0000 | [diff] [blame] | 286 | SuggestedType = getTypeName(*Result->getIdentifier(), IILoc, S, SS, |
| 287 | false, false, ParsedType(), |
| 288 | /*NonTrivialTypeSourceInfo=*/true); |
Douglas Gregor | aaf8716 | 2010-04-14 20:04:41 +0000 | [diff] [blame] | 289 | return true; |
| 290 | } |
| 291 | } else if (Lookup.empty()) { |
| 292 | // We corrected to a keyword. |
| 293 | // FIXME: Actually recover with the keyword we suggest, and emit a fix-it. |
| 294 | Diag(IILoc, diag::err_unknown_typename_suggest) |
| 295 | << &II << Corrected; |
| 296 | return true; |
Douglas Gregor | 546be3c | 2009-12-30 17:04:44 +0000 | [diff] [blame] | 297 | } |
| 298 | } |
| 299 | |
Jeffrey Yasskin | c173be2 | 2010-04-08 21:04:54 +0000 | [diff] [blame] | 300 | if (getLangOptions().CPlusPlus) { |
| 301 | // See if II is a class template that the user forgot to pass arguments to. |
| 302 | UnqualifiedId Name; |
| 303 | Name.setIdentifier(&II, IILoc); |
| 304 | CXXScopeSpec EmptySS; |
| 305 | TemplateTy TemplateResult; |
Douglas Gregor | 1fd6d44 | 2010-05-21 23:18:07 +0000 | [diff] [blame] | 306 | bool MemberOfUnknownSpecialization; |
Abramo Bagnara | 7c15353 | 2010-08-06 12:11:11 +0000 | [diff] [blame] | 307 | if (isTemplateName(S, SS ? *SS : EmptySS, /*hasTemplateKeyword=*/false, |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 308 | Name, ParsedType(), true, TemplateResult, |
Douglas Gregor | 1fd6d44 | 2010-05-21 23:18:07 +0000 | [diff] [blame] | 309 | MemberOfUnknownSpecialization) == TNK_Type_template) { |
Jeffrey Yasskin | c173be2 | 2010-04-08 21:04:54 +0000 | [diff] [blame] | 310 | TemplateName TplName = TemplateResult.getAsVal<TemplateName>(); |
| 311 | Diag(IILoc, diag::err_template_missing_args) << TplName; |
| 312 | if (TemplateDecl *TplDecl = TplName.getAsTemplateDecl()) { |
| 313 | Diag(TplDecl->getLocation(), diag::note_template_decl_here) |
| 314 | << TplDecl->getTemplateParameters()->getSourceRange(); |
| 315 | } |
| 316 | return true; |
| 317 | } |
| 318 | } |
| 319 | |
Douglas Gregor | a786fdb | 2009-10-13 23:27:22 +0000 | [diff] [blame] | 320 | // FIXME: Should we move the logic that tries to recover from a missing tag |
| 321 | // (struct, union, enum) from Parser::ParseImplicitInt here, instead? |
| 322 | |
Douglas Gregor | 546be3c | 2009-12-30 17:04:44 +0000 | [diff] [blame] | 323 | if (!SS || (!SS->isSet() && !SS->isInvalid())) |
Douglas Gregor | a786fdb | 2009-10-13 23:27:22 +0000 | [diff] [blame] | 324 | Diag(IILoc, diag::err_unknown_typename) << &II; |
| 325 | else if (DeclContext *DC = computeDeclContext(*SS, false)) |
| 326 | Diag(IILoc, diag::err_typename_nested_not_found) |
| 327 | << &II << DC << SS->getRange(); |
| 328 | else if (isDependentScopeSpecifier(*SS)) { |
| 329 | Diag(SS->getRange().getBegin(), diag::err_typename_missing) |
Daniel Dunbar | 01eb9b9 | 2009-10-18 21:17:35 +0000 | [diff] [blame] | 330 | << (NestedNameSpecifier *)SS->getScopeRep() << II.getName() |
Douglas Gregor | a786fdb | 2009-10-13 23:27:22 +0000 | [diff] [blame] | 331 | << SourceRange(SS->getRange().getBegin(), IILoc) |
Douglas Gregor | 849b243 | 2010-03-31 17:46:05 +0000 | [diff] [blame] | 332 | << FixItHint::CreateInsertion(SS->getRange().getBegin(), "typename "); |
Douglas Gregor | 1a15dae | 2010-06-16 22:31:08 +0000 | [diff] [blame] | 333 | SuggestedType = ActOnTypenameType(S, SourceLocation(), *SS, II, IILoc).get(); |
Douglas Gregor | a786fdb | 2009-10-13 23:27:22 +0000 | [diff] [blame] | 334 | } else { |
| 335 | assert(SS && SS->isInvalid() && |
| 336 | "Invalid scope specifier has already been diagnosed"); |
| 337 | } |
| 338 | |
| 339 | return true; |
| 340 | } |
Chris Lattner | 4c97d76 | 2009-04-12 21:49:30 +0000 | [diff] [blame] | 341 | |
John McCall | 88232aa | 2009-08-18 00:00:49 +0000 | [diff] [blame] | 342 | // Determines the context to return to after temporarily entering a |
| 343 | // context. This depends in an unnecessarily complicated way on the |
| 344 | // exact ordering of callbacks from the parser. |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 345 | DeclContext *Sema::getContainingDC(DeclContext *DC) { |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 346 | |
John McCall | 88232aa | 2009-08-18 00:00:49 +0000 | [diff] [blame] | 347 | // Functions defined inline within classes aren't parsed until we've |
| 348 | // finished parsing the top-level class, so the top-level class is |
| 349 | // the context we'll need to return to. |
| 350 | if (isa<FunctionDecl>(DC)) { |
| 351 | DC = DC->getLexicalParent(); |
| 352 | |
| 353 | // A function not defined within a class will always return to its |
| 354 | // lexical context. |
| 355 | if (!isa<CXXRecordDecl>(DC)) |
| 356 | return DC; |
| 357 | |
| 358 | // A C++ inline method/friend is parsed *after* the topmost class |
| 359 | // it was declared in is fully parsed ("complete"); the topmost |
| 360 | // class is the context we need to return to. |
Argyrios Kyrtzidis | 77407b8 | 2008-11-19 18:01:13 +0000 | [diff] [blame] | 361 | while (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(DC->getLexicalParent())) |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 362 | DC = RD; |
| 363 | |
| 364 | // Return the declaration context of the topmost class the inline method is |
| 365 | // declared in. |
| 366 | return DC; |
| 367 | } |
| 368 | |
John McCall | 9983d2d | 2010-08-06 00:46:05 +0000 | [diff] [blame] | 369 | // ObjCMethodDecls are parsed (for some reason) outside the context |
| 370 | // of the class. |
Argyrios Kyrtzidis | 5239304 | 2008-11-09 23:41:00 +0000 | [diff] [blame] | 371 | if (isa<ObjCMethodDecl>(DC)) |
John McCall | 9983d2d | 2010-08-06 00:46:05 +0000 | [diff] [blame] | 372 | return DC->getLexicalParent()->getLexicalParent(); |
Argyrios Kyrtzidis | 5239304 | 2008-11-09 23:41:00 +0000 | [diff] [blame] | 373 | |
Argyrios Kyrtzidis | 77407b8 | 2008-11-19 18:01:13 +0000 | [diff] [blame] | 374 | return DC->getLexicalParent(); |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 375 | } |
| 376 | |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 377 | void Sema::PushDeclContext(Scope *S, DeclContext *DC) { |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 378 | assert(getContainingDC(DC) == CurContext && |
Zhongxing Xu | e50897a | 2008-12-08 07:14:51 +0000 | [diff] [blame] | 379 | "The next DeclContext should be lexically contained in the current one."); |
Chris Lattner | 9fdf9c6 | 2008-04-22 18:39:57 +0000 | [diff] [blame] | 380 | CurContext = DC; |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 381 | S->setEntity(DC); |
Chris Lattner | 0ed844b | 2008-04-04 06:12:32 +0000 | [diff] [blame] | 382 | } |
| 383 | |
Chris Lattner | b048c98 | 2008-04-06 04:47:34 +0000 | [diff] [blame] | 384 | void Sema::PopDeclContext() { |
| 385 | assert(CurContext && "DeclContext imbalance!"); |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 386 | |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 387 | CurContext = getContainingDC(CurContext); |
John McCall | acb7039 | 2010-07-23 22:45:07 +0000 | [diff] [blame] | 388 | assert(CurContext && "Popped translation unit!"); |
Chris Lattner | 0ed844b | 2008-04-04 06:12:32 +0000 | [diff] [blame] | 389 | } |
| 390 | |
Argyrios Kyrtzidis | 179fe1a | 2009-06-17 23:19:02 +0000 | [diff] [blame] | 391 | /// EnterDeclaratorContext - Used when we must lookup names in the context |
| 392 | /// of a declarator's nested name specifier. |
John McCall | 7a1dc56 | 2009-12-19 10:49:29 +0000 | [diff] [blame] | 393 | /// |
Argyrios Kyrtzidis | 1d17553 | 2009-06-17 23:15:40 +0000 | [diff] [blame] | 394 | void Sema::EnterDeclaratorContext(Scope *S, DeclContext *DC) { |
John McCall | 7a1dc56 | 2009-12-19 10:49:29 +0000 | [diff] [blame] | 395 | // C++0x [basic.lookup.unqual]p13: |
| 396 | // A name used in the definition of a static data member of class |
| 397 | // X (after the qualified-id of the static member) is looked up as |
| 398 | // if the name was used in a member function of X. |
| 399 | // C++0x [basic.lookup.unqual]p14: |
| 400 | // If a variable member of a namespace is defined outside of the |
| 401 | // scope of its namespace then any name used in the definition of |
| 402 | // the variable member (after the declarator-id) is looked up as |
| 403 | // if the definition of the variable member occurred in its |
| 404 | // namespace. |
| 405 | // Both of these imply that we should push a scope whose context |
| 406 | // is the semantic context of the declaration. We can't use |
| 407 | // PushDeclContext here because that context is not necessarily |
| 408 | // lexically contained in the current context. Fortunately, |
| 409 | // the containing scope should have the appropriate information. |
| 410 | |
| 411 | assert(!S->getEntity() && "scope already has entity"); |
| 412 | |
| 413 | #ifndef NDEBUG |
| 414 | Scope *Ancestor = S->getParent(); |
| 415 | while (!Ancestor->getEntity()) Ancestor = Ancestor->getParent(); |
| 416 | assert(Ancestor->getEntity() == CurContext && "ancestor context mismatch"); |
| 417 | #endif |
| 418 | |
Argyrios Kyrtzidis | 1d17553 | 2009-06-17 23:15:40 +0000 | [diff] [blame] | 419 | CurContext = DC; |
John McCall | 7a1dc56 | 2009-12-19 10:49:29 +0000 | [diff] [blame] | 420 | S->setEntity(DC); |
Argyrios Kyrtzidis | 1d17553 | 2009-06-17 23:15:40 +0000 | [diff] [blame] | 421 | } |
| 422 | |
Argyrios Kyrtzidis | 1d17553 | 2009-06-17 23:15:40 +0000 | [diff] [blame] | 423 | void Sema::ExitDeclaratorContext(Scope *S) { |
John McCall | 7a1dc56 | 2009-12-19 10:49:29 +0000 | [diff] [blame] | 424 | assert(S->getEntity() == CurContext && "Context imbalance!"); |
Argyrios Kyrtzidis | 1d17553 | 2009-06-17 23:15:40 +0000 | [diff] [blame] | 425 | |
John McCall | 7a1dc56 | 2009-12-19 10:49:29 +0000 | [diff] [blame] | 426 | // Switch back to the lexical context. The safety of this is |
| 427 | // enforced by an assert in EnterDeclaratorContext. |
| 428 | Scope *Ancestor = S->getParent(); |
| 429 | while (!Ancestor->getEntity()) Ancestor = Ancestor->getParent(); |
| 430 | CurContext = (DeclContext*) Ancestor->getEntity(); |
| 431 | |
| 432 | // We don't need to do anything with the scope, which is going to |
| 433 | // disappear. |
Argyrios Kyrtzidis | 1d17553 | 2009-06-17 23:15:40 +0000 | [diff] [blame] | 434 | } |
| 435 | |
Douglas Gregor | f9201e0 | 2009-02-11 23:02:49 +0000 | [diff] [blame] | 436 | /// \brief Determine whether we allow overloading of the function |
| 437 | /// PrevDecl with another declaration. |
| 438 | /// |
| 439 | /// This routine determines whether overloading is possible, not |
| 440 | /// whether some new function is actually an overload. It will return |
| 441 | /// true in C++ (where we can always provide overloads) or, as an |
| 442 | /// extension, in C when the previous function is already an |
| 443 | /// overloaded function declaration or has the "overloadable" |
| 444 | /// attribute. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 445 | static bool AllowOverloadingOfFunction(LookupResult &Previous, |
| 446 | ASTContext &Context) { |
Douglas Gregor | f9201e0 | 2009-02-11 23:02:49 +0000 | [diff] [blame] | 447 | if (Context.getLangOptions().CPlusPlus) |
| 448 | return true; |
| 449 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 450 | if (Previous.getResultKind() == LookupResult::FoundOverloaded) |
Douglas Gregor | f9201e0 | 2009-02-11 23:02:49 +0000 | [diff] [blame] | 451 | return true; |
| 452 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 453 | return (Previous.getResultKind() == LookupResult::Found |
| 454 | && Previous.getFoundDecl()->hasAttr<OverloadableAttr>()); |
Douglas Gregor | f9201e0 | 2009-02-11 23:02:49 +0000 | [diff] [blame] | 455 | } |
| 456 | |
Argyrios Kyrtzidis | 87f3ff0 | 2008-04-12 00:47:19 +0000 | [diff] [blame] | 457 | /// Add this decl to the scope shadowed decl chains. |
John McCall | ab88d97 | 2009-08-31 22:39:49 +0000 | [diff] [blame] | 458 | void Sema::PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext) { |
Douglas Gregor | 074149e | 2009-01-05 19:45:36 +0000 | [diff] [blame] | 459 | // Move up the scope chain until we find the nearest enclosing |
| 460 | // non-transparent context. The declaration will be introduced into this |
| 461 | // scope. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 462 | while (S->getEntity() && |
Douglas Gregor | 074149e | 2009-01-05 19:45:36 +0000 | [diff] [blame] | 463 | ((DeclContext *)S->getEntity())->isTransparentContext()) |
| 464 | S = S->getParent(); |
| 465 | |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 466 | // Add scoped declarations into their context, so that they can be |
| 467 | // found later. Declarations without a context won't be inserted |
| 468 | // into any context. |
John McCall | ab88d97 | 2009-08-31 22:39:49 +0000 | [diff] [blame] | 469 | if (AddToContext) |
| 470 | CurContext->addDecl(D); |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 471 | |
Chandler Carruth | 8761d68 | 2010-02-21 07:08:09 +0000 | [diff] [blame] | 472 | // Out-of-line definitions shouldn't be pushed into scope in C++. |
| 473 | // Out-of-line variable and function definitions shouldn't even in C. |
| 474 | if ((getLangOptions().CPlusPlus || isa<VarDecl>(D) || isa<FunctionDecl>(D)) && |
| 475 | D->isOutOfLine()) |
| 476 | return; |
| 477 | |
| 478 | // Template instantiations should also not be pushed into scope. |
| 479 | if (isa<FunctionDecl>(D) && |
| 480 | cast<FunctionDecl>(D)->isFunctionTemplateSpecialization()) |
Douglas Gregor | d04b1be | 2009-09-28 18:41:37 +0000 | [diff] [blame] | 481 | return; |
| 482 | |
John McCall | f36e02d | 2009-10-09 21:13:30 +0000 | [diff] [blame] | 483 | // If this replaces anything in the current scope, |
| 484 | IdentifierResolver::iterator I = IdResolver.begin(D->getDeclName()), |
| 485 | IEnd = IdResolver.end(); |
| 486 | for (; I != IEnd; ++I) { |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 487 | if (S->isDeclScope(*I) && D->declarationReplaces(*I)) { |
| 488 | S->RemoveDecl(*I); |
John McCall | f36e02d | 2009-10-09 21:13:30 +0000 | [diff] [blame] | 489 | IdResolver.RemoveDecl(*I); |
Argyrios Kyrtzidis | 00bc645 | 2008-05-09 23:39:43 +0000 | [diff] [blame] | 490 | |
John McCall | f36e02d | 2009-10-09 21:13:30 +0000 | [diff] [blame] | 491 | // Should only need to replace one decl. |
| 492 | break; |
Douglas Gregor | 516ff43 | 2009-04-24 02:57:34 +0000 | [diff] [blame] | 493 | } |
Argyrios Kyrtzidis | 00bc645 | 2008-05-09 23:39:43 +0000 | [diff] [blame] | 494 | } |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 495 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 496 | S->AddDecl(D); |
Douglas Gregor | 7cbc558 | 2011-03-14 21:19:51 +0000 | [diff] [blame^] | 497 | |
| 498 | if (isa<LabelDecl>(D) && !cast<LabelDecl>(D)->isGnuLocal()) { |
| 499 | // Implicitly-generated labels may end up getting generated in an order that |
| 500 | // isn't strictly lexical, which breaks name lookup. Be careful to insert |
| 501 | // the label at the appropriate place in the identifier chain. |
| 502 | for (I = IdResolver.begin(D->getDeclName()); I != IEnd; ++I) { |
| 503 | if ((*I)->getLexicalDeclContext()->Encloses(CurContext)) |
| 504 | break; |
| 505 | } |
| 506 | |
| 507 | IdResolver.InsertDecl(I, D); |
| 508 | } else { |
| 509 | IdResolver.AddDecl(D); |
| 510 | } |
Argyrios Kyrtzidis | 87f3ff0 | 2008-04-12 00:47:19 +0000 | [diff] [blame] | 511 | } |
| 512 | |
Douglas Gregor | cc20945 | 2011-03-07 16:54:27 +0000 | [diff] [blame] | 513 | bool Sema::isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S, |
| 514 | bool ExplicitInstantiationOrSpecialization) { |
| 515 | return IdResolver.isDeclInScope(D, Ctx, Context, S, |
| 516 | ExplicitInstantiationOrSpecialization); |
Douglas Gregor | 2531c2d | 2009-09-28 00:47:05 +0000 | [diff] [blame] | 517 | } |
| 518 | |
John McCall | 5f1e094 | 2010-08-24 08:50:51 +0000 | [diff] [blame] | 519 | Scope *Sema::getScopeForDeclContext(Scope *S, DeclContext *DC) { |
| 520 | DeclContext *TargetDC = DC->getPrimaryContext(); |
| 521 | do { |
| 522 | if (DeclContext *ScopeDC = (DeclContext*) S->getEntity()) |
| 523 | if (ScopeDC->getPrimaryContext() == TargetDC) |
| 524 | return S; |
| 525 | } while ((S = S->getParent())); |
| 526 | |
| 527 | return 0; |
| 528 | } |
| 529 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 530 | static bool isOutOfScopePreviousDeclaration(NamedDecl *, |
| 531 | DeclContext*, |
| 532 | ASTContext&); |
| 533 | |
| 534 | /// Filters out lookup results that don't fall within the given scope |
| 535 | /// as determined by isDeclInScope. |
| 536 | static void FilterLookupForScope(Sema &SemaRef, LookupResult &R, |
| 537 | DeclContext *Ctx, Scope *S, |
Douglas Gregor | cc20945 | 2011-03-07 16:54:27 +0000 | [diff] [blame] | 538 | bool ConsiderLinkage, |
| 539 | bool ExplicitInstantiationOrSpecialization) { |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 540 | LookupResult::Filter F = R.makeFilter(); |
| 541 | while (F.hasNext()) { |
| 542 | NamedDecl *D = F.next(); |
| 543 | |
Douglas Gregor | cc20945 | 2011-03-07 16:54:27 +0000 | [diff] [blame] | 544 | if (SemaRef.isDeclInScope(D, Ctx, S, ExplicitInstantiationOrSpecialization)) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 545 | continue; |
| 546 | |
| 547 | if (ConsiderLinkage && |
| 548 | isOutOfScopePreviousDeclaration(D, Ctx, SemaRef.Context)) |
| 549 | continue; |
| 550 | |
| 551 | F.erase(); |
| 552 | } |
| 553 | |
| 554 | F.done(); |
| 555 | } |
| 556 | |
| 557 | static bool isUsingDecl(NamedDecl *D) { |
| 558 | return isa<UsingShadowDecl>(D) || |
| 559 | isa<UnresolvedUsingTypenameDecl>(D) || |
| 560 | isa<UnresolvedUsingValueDecl>(D); |
| 561 | } |
| 562 | |
| 563 | /// Removes using shadow declarations from the lookup results. |
| 564 | static void RemoveUsingDecls(LookupResult &R) { |
| 565 | LookupResult::Filter F = R.makeFilter(); |
| 566 | while (F.hasNext()) |
| 567 | if (isUsingDecl(F.next())) |
| 568 | F.erase(); |
| 569 | |
| 570 | F.done(); |
| 571 | } |
| 572 | |
Argyrios Kyrtzidis | 06999f8 | 2010-08-15 10:17:33 +0000 | [diff] [blame] | 573 | /// \brief Check for this common pattern: |
| 574 | /// @code |
| 575 | /// class S { |
| 576 | /// S(const S&); // DO NOT IMPLEMENT |
| 577 | /// void operator=(const S&); // DO NOT IMPLEMENT |
| 578 | /// }; |
| 579 | /// @endcode |
| 580 | static bool IsDisallowedCopyOrAssign(const CXXMethodDecl *D) { |
| 581 | // FIXME: Should check for private access too but access is set after we get |
| 582 | // the decl here. |
| 583 | if (D->isThisDeclarationADefinition()) |
| 584 | return false; |
| 585 | |
| 586 | if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) |
| 587 | return CD->isCopyConstructor(); |
Douglas Gregor | 27c08ab | 2010-09-27 22:06:20 +0000 | [diff] [blame] | 588 | if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) |
| 589 | return Method->isCopyAssignmentOperator(); |
| 590 | return false; |
Argyrios Kyrtzidis | 06999f8 | 2010-08-15 10:17:33 +0000 | [diff] [blame] | 591 | } |
| 592 | |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 593 | bool Sema::ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const { |
| 594 | assert(D); |
Argyrios Kyrtzidis | f6d1d43 | 2010-08-13 18:42:29 +0000 | [diff] [blame] | 595 | |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 596 | if (D->isInvalidDecl() || D->isUsed() || D->hasAttr<UnusedAttr>()) |
| 597 | return false; |
| 598 | |
| 599 | // Ignore class templates. |
Chandler Carruth | ef9d09c | 2011-01-03 19:27:19 +0000 | [diff] [blame] | 600 | if (D->getDeclContext()->isDependentContext() || |
| 601 | D->getLexicalDeclContext()->isDependentContext()) |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 602 | return false; |
| 603 | |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 604 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { |
Argyrios Kyrtzidis | 06999f8 | 2010-08-15 10:17:33 +0000 | [diff] [blame] | 605 | if (FD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation) |
| 606 | return false; |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 607 | |
Argyrios Kyrtzidis | 06999f8 | 2010-08-15 10:17:33 +0000 | [diff] [blame] | 608 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { |
| 609 | if (MD->isVirtual() || IsDisallowedCopyOrAssign(MD)) |
| 610 | return false; |
| 611 | } else { |
| 612 | // 'static inline' functions are used in headers; don't warn. |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 613 | if (FD->getStorageClass() == SC_Static && |
Argyrios Kyrtzidis | 06999f8 | 2010-08-15 10:17:33 +0000 | [diff] [blame] | 614 | FD->isInlineSpecified()) |
| 615 | return false; |
| 616 | } |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 617 | |
John McCall | 82b9659 | 2010-10-27 01:41:35 +0000 | [diff] [blame] | 618 | if (FD->isThisDeclarationADefinition() && |
| 619 | Context.DeclMustBeEmitted(FD)) |
| 620 | return false; |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 621 | |
John McCall | 82b9659 | 2010-10-27 01:41:35 +0000 | [diff] [blame] | 622 | } else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { |
| 623 | if (!VD->isFileVarDecl() || |
| 624 | VD->getType().isConstant(Context) || |
| 625 | Context.DeclMustBeEmitted(VD)) |
| 626 | return false; |
| 627 | |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 628 | if (VD->isStaticDataMember() && |
| 629 | VD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation) |
| 630 | return false; |
| 631 | |
John McCall | 82b9659 | 2010-10-27 01:41:35 +0000 | [diff] [blame] | 632 | } else { |
| 633 | return false; |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 634 | } |
| 635 | |
John McCall | 82b9659 | 2010-10-27 01:41:35 +0000 | [diff] [blame] | 636 | // Only warn for unused decls internal to the translation unit. |
| 637 | if (D->getLinkage() == ExternalLinkage) |
| 638 | return false; |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 639 | |
John McCall | 82b9659 | 2010-10-27 01:41:35 +0000 | [diff] [blame] | 640 | return true; |
| 641 | } |
| 642 | |
| 643 | void Sema::MarkUnusedFileScopedDecl(const DeclaratorDecl *D) { |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 644 | if (!D) |
| 645 | return; |
| 646 | |
| 647 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { |
| 648 | const FunctionDecl *First = FD->getFirstDeclaration(); |
| 649 | if (FD != First && ShouldWarnIfUnusedFileScopedDecl(First)) |
| 650 | return; // First should already be in the vector. |
| 651 | } |
| 652 | |
| 653 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { |
| 654 | const VarDecl *First = VD->getFirstDeclaration(); |
| 655 | if (VD != First && ShouldWarnIfUnusedFileScopedDecl(First)) |
| 656 | return; // First should already be in the vector. |
| 657 | } |
| 658 | |
| 659 | if (ShouldWarnIfUnusedFileScopedDecl(D)) |
| 660 | UnusedFileScopedDecls.push_back(D); |
| 661 | } |
Argyrios Kyrtzidis | 49b96d1 | 2010-08-13 18:42:17 +0000 | [diff] [blame] | 662 | |
Anders Carlsson | 99a000e | 2009-11-07 07:18:14 +0000 | [diff] [blame] | 663 | static bool ShouldDiagnoseUnusedDecl(const NamedDecl *D) { |
John McCall | 86ff308 | 2010-02-04 22:26:26 +0000 | [diff] [blame] | 664 | if (D->isInvalidDecl()) |
| 665 | return false; |
| 666 | |
Anders Carlsson | f7613d5 | 2009-11-07 07:26:56 +0000 | [diff] [blame] | 667 | if (D->isUsed() || D->hasAttr<UnusedAttr>()) |
| 668 | return false; |
John McCall | 86ff308 | 2010-02-04 22:26:26 +0000 | [diff] [blame] | 669 | |
Chris Lattner | 57ad378 | 2011-02-17 20:34:02 +0000 | [diff] [blame] | 670 | if (isa<LabelDecl>(D)) |
| 671 | return true; |
| 672 | |
John McCall | 86ff308 | 2010-02-04 22:26:26 +0000 | [diff] [blame] | 673 | // White-list anything that isn't a local variable. |
| 674 | if (!isa<VarDecl>(D) || isa<ParmVarDecl>(D) || isa<ImplicitParamDecl>(D) || |
| 675 | !D->getDeclContext()->isFunctionOrMethod()) |
| 676 | return false; |
| 677 | |
| 678 | // Types of valid local variables should be complete, so this should succeed. |
Anders Carlsson | f7613d5 | 2009-11-07 07:26:56 +0000 | [diff] [blame] | 679 | if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { |
John McCall | aec5860 | 2010-03-31 02:47:45 +0000 | [diff] [blame] | 680 | |
| 681 | // White-list anything with an __attribute__((unused)) type. |
| 682 | QualType Ty = VD->getType(); |
| 683 | |
| 684 | // Only look at the outermost level of typedef. |
| 685 | if (const TypedefType *TT = dyn_cast<TypedefType>(Ty)) { |
| 686 | if (TT->getDecl()->hasAttr<UnusedAttr>()) |
| 687 | return false; |
| 688 | } |
| 689 | |
Douglas Gregor | 5764f61 | 2010-05-08 23:05:03 +0000 | [diff] [blame] | 690 | // If we failed to complete the type for some reason, or if the type is |
| 691 | // dependent, don't diagnose the variable. |
| 692 | if (Ty->isIncompleteType() || Ty->isDependentType()) |
Douglas Gregor | a6a292b | 2010-04-27 16:20:13 +0000 | [diff] [blame] | 693 | return false; |
| 694 | |
John McCall | aec5860 | 2010-03-31 02:47:45 +0000 | [diff] [blame] | 695 | if (const TagType *TT = Ty->getAs<TagType>()) { |
| 696 | const TagDecl *Tag = TT->getDecl(); |
| 697 | if (Tag->hasAttr<UnusedAttr>()) |
| 698 | return false; |
| 699 | |
| 700 | if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(Tag)) { |
Douglas Gregor | 5764f61 | 2010-05-08 23:05:03 +0000 | [diff] [blame] | 701 | // FIXME: Checking for the presence of a user-declared constructor |
| 702 | // isn't completely accurate; we'd prefer to check that the initializer |
| 703 | // has no side effects. |
| 704 | if (RD->hasUserDeclaredConstructor() || !RD->hasTrivialDestructor()) |
Anders Carlsson | f7613d5 | 2009-11-07 07:26:56 +0000 | [diff] [blame] | 705 | return false; |
| 706 | } |
| 707 | } |
John McCall | aec5860 | 2010-03-31 02:47:45 +0000 | [diff] [blame] | 708 | |
| 709 | // TODO: __attribute__((unused)) templates? |
Anders Carlsson | f7613d5 | 2009-11-07 07:26:56 +0000 | [diff] [blame] | 710 | } |
| 711 | |
John McCall | 86ff308 | 2010-02-04 22:26:26 +0000 | [diff] [blame] | 712 | return true; |
Anders Carlsson | 99a000e | 2009-11-07 07:18:14 +0000 | [diff] [blame] | 713 | } |
| 714 | |
Chris Lattner | 337e550 | 2011-02-18 01:27:55 +0000 | [diff] [blame] | 715 | /// DiagnoseUnusedDecl - Emit warnings about declarations that are not used |
| 716 | /// unless they are marked attr(unused). |
Douglas Gregor | 5764f61 | 2010-05-08 23:05:03 +0000 | [diff] [blame] | 717 | void Sema::DiagnoseUnusedDecl(const NamedDecl *D) { |
| 718 | if (!ShouldDiagnoseUnusedDecl(D)) |
| 719 | return; |
| 720 | |
Chris Lattner | 57ad378 | 2011-02-17 20:34:02 +0000 | [diff] [blame] | 721 | unsigned DiagID; |
Douglas Gregor | 5764f61 | 2010-05-08 23:05:03 +0000 | [diff] [blame] | 722 | if (isa<VarDecl>(D) && cast<VarDecl>(D)->isExceptionVariable()) |
Chris Lattner | 57ad378 | 2011-02-17 20:34:02 +0000 | [diff] [blame] | 723 | DiagID = diag::warn_unused_exception_param; |
| 724 | else if (isa<LabelDecl>(D)) |
| 725 | DiagID = diag::warn_unused_label; |
Douglas Gregor | 5764f61 | 2010-05-08 23:05:03 +0000 | [diff] [blame] | 726 | else |
Chris Lattner | 57ad378 | 2011-02-17 20:34:02 +0000 | [diff] [blame] | 727 | DiagID = diag::warn_unused_variable; |
| 728 | |
| 729 | Diag(D->getLocation(), DiagID) << D->getDeclName(); |
Douglas Gregor | 5764f61 | 2010-05-08 23:05:03 +0000 | [diff] [blame] | 730 | } |
| 731 | |
Chris Lattner | 337e550 | 2011-02-18 01:27:55 +0000 | [diff] [blame] | 732 | static void CheckPoppedLabel(LabelDecl *L, Sema &S) { |
| 733 | // Verify that we have no forward references left. If so, there was a goto |
| 734 | // or address of a label taken, but no definition of it. Label fwd |
| 735 | // definitions are indicated with a null substmt. |
| 736 | if (L->getStmt() == 0) |
| 737 | S.Diag(L->getLocation(), diag::err_undeclared_label_use) <<L->getDeclName(); |
| 738 | } |
| 739 | |
Steve Naroff | b216c88 | 2007-10-09 22:01:59 +0000 | [diff] [blame] | 740 | void Sema::ActOnPopScope(SourceLocation Loc, Scope *S) { |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 741 | if (S->decl_empty()) return; |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 742 | assert((S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope)) && |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 743 | "Scope shouldn't contain decls!"); |
Argyrios Kyrtzidis | 00bc645 | 2008-05-09 23:39:43 +0000 | [diff] [blame] | 744 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 745 | for (Scope::decl_iterator I = S->decl_begin(), E = S->decl_end(); |
| 746 | I != E; ++I) { |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 747 | Decl *TmpD = (*I); |
Steve Naroff | c752d04 | 2007-09-13 18:10:37 +0000 | [diff] [blame] | 748 | assert(TmpD && "This decl didn't get pushed??"); |
Argyrios Kyrtzidis | 7643536 | 2008-06-10 01:32:09 +0000 | [diff] [blame] | 749 | |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 750 | assert(isa<NamedDecl>(TmpD) && "Decl isn't NamedDecl?"); |
| 751 | NamedDecl *D = cast<NamedDecl>(TmpD); |
Argyrios Kyrtzidis | 7643536 | 2008-06-10 01:32:09 +0000 | [diff] [blame] | 752 | |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 753 | if (!D->getDeclName()) continue; |
Chris Lattner | 7f925cc | 2008-04-11 07:00:53 +0000 | [diff] [blame] | 754 | |
Douglas Gregor | b5352cf | 2009-10-08 21:35:42 +0000 | [diff] [blame] | 755 | // Diagnose unused variables in this scope. |
Argyrios Kyrtzidis | 9c4eb1f | 2010-11-19 00:19:12 +0000 | [diff] [blame] | 756 | if (!S->hasErrorOccurred()) |
Douglas Gregor | 5764f61 | 2010-05-08 23:05:03 +0000 | [diff] [blame] | 757 | DiagnoseUnusedDecl(D); |
| 758 | |
Chris Lattner | 337e550 | 2011-02-18 01:27:55 +0000 | [diff] [blame] | 759 | // If this was a forward reference to a label, verify it was defined. |
| 760 | if (LabelDecl *LD = dyn_cast<LabelDecl>(D)) |
| 761 | CheckPoppedLabel(LD, *this); |
| 762 | |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 763 | // Remove this name from our lexical scope. |
| 764 | IdResolver.RemoveDecl(D); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 765 | } |
| 766 | } |
| 767 | |
Douglas Gregor | deacbdc | 2010-08-11 12:19:30 +0000 | [diff] [blame] | 768 | /// \brief Look for an Objective-C class in the translation unit. |
| 769 | /// |
| 770 | /// \param Id The name of the Objective-C class we're looking for. If |
| 771 | /// typo-correction fixes this name, the Id will be updated |
| 772 | /// to the fixed name. |
| 773 | /// |
| 774 | /// \param IdLoc The location of the name in the translation unit. |
| 775 | /// |
| 776 | /// \param TypoCorrection If true, this routine will attempt typo correction |
| 777 | /// if there is no class with the given name. |
| 778 | /// |
| 779 | /// \returns The declaration of the named Objective-C class, or NULL if the |
| 780 | /// class could not be found. |
| 781 | ObjCInterfaceDecl *Sema::getObjCInterfaceDecl(IdentifierInfo *&Id, |
| 782 | SourceLocation IdLoc, |
| 783 | bool TypoCorrection) { |
| 784 | // The third "scope" argument is 0 since we aren't enabling lazy built-in |
| 785 | // creation from this context. |
| 786 | NamedDecl *IDecl = LookupSingleName(TUScope, Id, IdLoc, LookupOrdinaryName); |
| 787 | |
| 788 | if (!IDecl && TypoCorrection) { |
| 789 | // Perform typo correction at the given location, but only if we |
| 790 | // find an Objective-C class name. |
| 791 | LookupResult R(*this, Id, IdLoc, LookupOrdinaryName); |
| 792 | if (CorrectTypo(R, TUScope, 0, 0, false, CTC_NoKeywords) && |
| 793 | (IDecl = R.getAsSingle<ObjCInterfaceDecl>())) { |
| 794 | Diag(IdLoc, diag::err_undef_interface_suggest) |
| 795 | << Id << IDecl->getDeclName() |
| 796 | << FixItHint::CreateReplacement(IdLoc, IDecl->getNameAsString()); |
| 797 | Diag(IDecl->getLocation(), diag::note_previous_decl) |
| 798 | << IDecl->getDeclName(); |
| 799 | |
| 800 | Id = IDecl->getIdentifier(); |
| 801 | } |
| 802 | } |
| 803 | |
| 804 | return dyn_cast_or_null<ObjCInterfaceDecl>(IDecl); |
| 805 | } |
| 806 | |
Douglas Gregor | 1a0d31a | 2009-01-12 18:45:55 +0000 | [diff] [blame] | 807 | /// getNonFieldDeclScope - Retrieves the innermost scope, starting |
| 808 | /// from S, where a non-field would be declared. This routine copes |
| 809 | /// with the difference between C and C++ scoping rules in structs and |
| 810 | /// unions. For example, the following code is well-formed in C but |
| 811 | /// ill-formed in C++: |
| 812 | /// @code |
| 813 | /// struct S6 { |
| 814 | /// enum { BAR } e; |
| 815 | /// }; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 816 | /// |
Douglas Gregor | 1a0d31a | 2009-01-12 18:45:55 +0000 | [diff] [blame] | 817 | /// void test_S6() { |
| 818 | /// struct S6 a; |
| 819 | /// a.e = BAR; |
| 820 | /// } |
| 821 | /// @endcode |
| 822 | /// For the declaration of BAR, this routine will return a different |
| 823 | /// scope. The scope S will be the scope of the unnamed enumeration |
| 824 | /// within S6. In C++, this routine will return the scope associated |
| 825 | /// with S6, because the enumeration's scope is a transparent |
| 826 | /// context but structures can contain non-field names. In C, this |
| 827 | /// routine will return the translation unit scope, since the |
| 828 | /// enumeration's scope is a transparent context and structures cannot |
| 829 | /// contain non-field names. |
| 830 | Scope *Sema::getNonFieldDeclScope(Scope *S) { |
| 831 | while (((S->getFlags() & Scope::DeclScope) == 0) || |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 832 | (S->getEntity() && |
Douglas Gregor | 1a0d31a | 2009-01-12 18:45:55 +0000 | [diff] [blame] | 833 | ((DeclContext *)S->getEntity())->isTransparentContext()) || |
| 834 | (S->isClassScope() && !getLangOptions().CPlusPlus)) |
| 835 | S = S->getParent(); |
| 836 | return S; |
| 837 | } |
| 838 | |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 839 | /// LazilyCreateBuiltin - The specified Builtin-ID was first used at |
| 840 | /// file scope. lazily create a decl for it. ForRedeclaration is true |
| 841 | /// if we're creating this built-in in anticipation of redeclaring the |
| 842 | /// built-in. |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 843 | NamedDecl *Sema::LazilyCreateBuiltin(IdentifierInfo *II, unsigned bid, |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 844 | Scope *S, bool ForRedeclaration, |
| 845 | SourceLocation Loc) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 846 | Builtin::ID BID = (Builtin::ID)bid; |
| 847 | |
Chris Lattner | 86df27b | 2009-06-14 00:45:47 +0000 | [diff] [blame] | 848 | ASTContext::GetBuiltinTypeError Error; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 849 | QualType R = Context.GetBuiltinType(BID, Error); |
Douglas Gregor | 370ab3f | 2009-02-14 01:52:53 +0000 | [diff] [blame] | 850 | switch (Error) { |
Chris Lattner | 86df27b | 2009-06-14 00:45:47 +0000 | [diff] [blame] | 851 | case ASTContext::GE_None: |
Douglas Gregor | 370ab3f | 2009-02-14 01:52:53 +0000 | [diff] [blame] | 852 | // Okay |
| 853 | break; |
| 854 | |
Mike Stump | f711c41 | 2009-07-28 23:57:15 +0000 | [diff] [blame] | 855 | case ASTContext::GE_Missing_stdio: |
Douglas Gregor | 370ab3f | 2009-02-14 01:52:53 +0000 | [diff] [blame] | 856 | if (ForRedeclaration) |
Douglas Gregor | 6b9109e | 2011-01-03 09:37:44 +0000 | [diff] [blame] | 857 | Diag(Loc, diag::warn_implicit_decl_requires_stdio) |
Douglas Gregor | 370ab3f | 2009-02-14 01:52:53 +0000 | [diff] [blame] | 858 | << Context.BuiltinInfo.GetName(BID); |
| 859 | return 0; |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 860 | |
Mike Stump | f711c41 | 2009-07-28 23:57:15 +0000 | [diff] [blame] | 861 | case ASTContext::GE_Missing_setjmp: |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 862 | if (ForRedeclaration) |
Douglas Gregor | 6b9109e | 2011-01-03 09:37:44 +0000 | [diff] [blame] | 863 | Diag(Loc, diag::warn_implicit_decl_requires_setjmp) |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 864 | << Context.BuiltinInfo.GetName(BID); |
| 865 | return 0; |
Douglas Gregor | 370ab3f | 2009-02-14 01:52:53 +0000 | [diff] [blame] | 866 | } |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 867 | |
| 868 | if (!ForRedeclaration && Context.BuiltinInfo.isPredefinedLibFunction(BID)) { |
| 869 | Diag(Loc, diag::ext_implicit_lib_function_decl) |
| 870 | << Context.BuiltinInfo.GetName(BID) |
| 871 | << R; |
Douglas Gregor | b1152d8 | 2009-02-16 21:58:21 +0000 | [diff] [blame] | 872 | if (Context.BuiltinInfo.getHeaderName(BID) && |
Argyrios Kyrtzidis | 0827408 | 2010-12-15 18:44:22 +0000 | [diff] [blame] | 873 | Diags.getDiagnosticLevel(diag::ext_implicit_lib_function_decl, Loc) |
Chris Lattner | 6a7334d | 2009-04-16 03:59:32 +0000 | [diff] [blame] | 874 | != Diagnostic::Ignored) |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 875 | Diag(Loc, diag::note_please_include_header) |
| 876 | << Context.BuiltinInfo.getHeaderName(BID) |
| 877 | << Context.BuiltinInfo.GetName(BID); |
| 878 | } |
| 879 | |
Argyrios Kyrtzidis | ff898cd | 2008-04-17 14:47:13 +0000 | [diff] [blame] | 880 | FunctionDecl *New = FunctionDecl::Create(Context, |
| 881 | Context.getTranslationUnitDecl(), |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 882 | Loc, Loc, II, R, /*TInfo=*/0, |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 883 | SC_Extern, |
| 884 | SC_None, false, |
Douglas Gregor | 2224f84 | 2009-02-25 16:33:18 +0000 | [diff] [blame] | 885 | /*hasPrototype=*/true); |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 886 | New->setImplicit(); |
| 887 | |
Chris Lattner | 95e2c71 | 2008-05-05 22:18:14 +0000 | [diff] [blame] | 888 | // Create Decl objects for each parameter, adding them to the |
| 889 | // FunctionDecl. |
John McCall | f4c7371 | 2011-01-19 06:33:43 +0000 | [diff] [blame] | 890 | if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(R)) { |
Chris Lattner | 95e2c71 | 2008-05-05 22:18:14 +0000 | [diff] [blame] | 891 | llvm::SmallVector<ParmVarDecl*, 16> Params; |
| 892 | for (unsigned i = 0, e = FT->getNumArgs(); i != e; ++i) |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 893 | Params.push_back(ParmVarDecl::Create(Context, New, SourceLocation(), |
| 894 | SourceLocation(), 0, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 895 | FT->getArgType(i), /*TInfo=*/0, |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 896 | SC_None, SC_None, 0)); |
Douglas Gregor | 838db38 | 2010-02-11 01:19:42 +0000 | [diff] [blame] | 897 | New->setParams(Params.data(), Params.size()); |
Chris Lattner | 95e2c71 | 2008-05-05 22:18:14 +0000 | [diff] [blame] | 898 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 899 | |
| 900 | AddKnownFunctionAttributes(New); |
| 901 | |
Chris Lattner | 7f925cc | 2008-04-11 07:00:53 +0000 | [diff] [blame] | 902 | // TUScope is the translation-unit scope to insert this function into. |
Douglas Gregor | a8cc8ce | 2009-01-09 18:51:29 +0000 | [diff] [blame] | 903 | // FIXME: This is hideous. We need to teach PushOnScopeChains to |
| 904 | // relate Scopes to DeclContexts, and probably eliminate CurContext |
| 905 | // entirely, but we're not there yet. |
| 906 | DeclContext *SavedContext = CurContext; |
| 907 | CurContext = Context.getTranslationUnitDecl(); |
Argyrios Kyrtzidis | 00bc645 | 2008-05-09 23:39:43 +0000 | [diff] [blame] | 908 | PushOnScopeChains(New, TUScope); |
Douglas Gregor | a8cc8ce | 2009-01-09 18:51:29 +0000 | [diff] [blame] | 909 | CurContext = SavedContext; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 910 | return New; |
| 911 | } |
| 912 | |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 913 | /// MergeTypeDefDecl - We just parsed a typedef 'New' which has the |
| 914 | /// same name and scope as a previous declaration 'Old'. Figure out |
| 915 | /// how to resolve this situation, merging decls or emitting |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 916 | /// 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] | 917 | /// |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 918 | void Sema::MergeTypeDefDecl(TypedefDecl *New, LookupResult &OldDecls) { |
| 919 | // If the new decl is known invalid already, don't bother doing any |
| 920 | // merging checks. |
| 921 | if (New->isInvalidDecl()) return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 922 | |
Steve Naroff | 2b255c4 | 2008-09-09 14:32:20 +0000 | [diff] [blame] | 923 | // Allow multiple definitions for ObjC built-in typedefs. |
| 924 | // FIXME: Verify the underlying types are equivalent! |
| 925 | if (getLangOptions().ObjC1) { |
Chris Lattner | 2bac0f6 | 2008-11-20 05:41:43 +0000 | [diff] [blame] | 926 | const IdentifierInfo *TypeID = New->getIdentifier(); |
| 927 | switch (TypeID->getLength()) { |
| 928 | default: break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 929 | case 2: |
Chris Lattner | 2bac0f6 | 2008-11-20 05:41:43 +0000 | [diff] [blame] | 930 | if (!TypeID->isStr("id")) |
| 931 | break; |
David Chisnall | 0f43656 | 2009-08-17 16:35:33 +0000 | [diff] [blame] | 932 | Context.ObjCIdRedefinitionType = New->getUnderlyingType(); |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 933 | // Install the built-in type for 'id', ignoring the current definition. |
| 934 | New->setTypeForDecl(Context.getObjCIdType().getTypePtr()); |
| 935 | return; |
Chris Lattner | 2bac0f6 | 2008-11-20 05:41:43 +0000 | [diff] [blame] | 936 | case 5: |
| 937 | if (!TypeID->isStr("Class")) |
| 938 | break; |
David Chisnall | 0f43656 | 2009-08-17 16:35:33 +0000 | [diff] [blame] | 939 | Context.ObjCClassRedefinitionType = New->getUnderlyingType(); |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 940 | // Install the built-in type for 'Class', ignoring the current definition. |
| 941 | New->setTypeForDecl(Context.getObjCClassType().getTypePtr()); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 942 | return; |
Chris Lattner | 2bac0f6 | 2008-11-20 05:41:43 +0000 | [diff] [blame] | 943 | case 3: |
| 944 | if (!TypeID->isStr("SEL")) |
| 945 | break; |
Fariborz Jahanian | 369a3bd | 2009-11-25 23:07:42 +0000 | [diff] [blame] | 946 | Context.ObjCSelRedefinitionType = New->getUnderlyingType(); |
Fariborz Jahanian | 13dcd00 | 2009-11-21 19:53:08 +0000 | [diff] [blame] | 947 | // Install the built-in type for 'SEL', ignoring the current definition. |
| 948 | New->setTypeForDecl(Context.getObjCSelType().getTypePtr()); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 949 | return; |
Chris Lattner | 2bac0f6 | 2008-11-20 05:41:43 +0000 | [diff] [blame] | 950 | case 8: |
| 951 | if (!TypeID->isStr("Protocol")) |
| 952 | break; |
Steve Naroff | 2b255c4 | 2008-09-09 14:32:20 +0000 | [diff] [blame] | 953 | Context.setObjCProtoType(New->getUnderlyingType()); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 954 | return; |
Steve Naroff | 2b255c4 | 2008-09-09 14:32:20 +0000 | [diff] [blame] | 955 | } |
| 956 | // Fall through - the typedef name was not a builtin type. |
| 957 | } |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 958 | |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 959 | // Verify the old decl was also a type. |
John McCall | 5126fd0 | 2009-12-30 00:31:22 +0000 | [diff] [blame] | 960 | TypeDecl *Old = OldDecls.getAsSingle<TypeDecl>(); |
| 961 | if (!Old) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 962 | Diag(New->getLocation(), diag::err_redefinition_different_kind) |
Chris Lattner | 08631c5 | 2008-11-23 21:45:46 +0000 | [diff] [blame] | 963 | << New->getDeclName(); |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 964 | |
| 965 | NamedDecl *OldD = OldDecls.getRepresentativeDecl(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 966 | if (OldD->getLocation().isValid()) |
Fariborz Jahanian | c55a240 | 2009-01-16 19:58:32 +0000 | [diff] [blame] | 967 | Diag(OldD->getLocation(), diag::note_previous_definition); |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 968 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 969 | return New->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 970 | } |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 971 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 972 | // If the old declaration is invalid, just give up here. |
| 973 | if (Old->isInvalidDecl()) |
| 974 | return New->setInvalidDecl(); |
| 975 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 976 | // Determine the "old" type we'll use for checking and diagnostics. |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 977 | QualType OldType; |
| 978 | if (TypedefDecl *OldTypedef = dyn_cast<TypedefDecl>(Old)) |
| 979 | OldType = OldTypedef->getUnderlyingType(); |
| 980 | else |
| 981 | OldType = Context.getTypeDeclType(Old); |
| 982 | |
Chris Lattner | 99cb997 | 2008-07-25 18:44:27 +0000 | [diff] [blame] | 983 | // If the typedef types are not identical, reject them in all languages and |
| 984 | // with any extensions enabled. |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 985 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 986 | if (OldType != New->getUnderlyingType() && |
| 987 | Context.getCanonicalType(OldType) != |
Chris Lattner | 99cb997 | 2008-07-25 18:44:27 +0000 | [diff] [blame] | 988 | Context.getCanonicalType(New->getUnderlyingType())) { |
Chris Lattner | 5dc266a | 2008-11-20 06:13:02 +0000 | [diff] [blame] | 989 | Diag(New->getLocation(), diag::err_redefinition_different_typedef) |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 990 | << New->getUnderlyingType() << OldType; |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 991 | if (Old->getLocation().isValid()) |
Fariborz Jahanian | c55a240 | 2009-01-16 19:58:32 +0000 | [diff] [blame] | 992 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 993 | return New->setInvalidDecl(); |
Chris Lattner | 99cb997 | 2008-07-25 18:44:27 +0000 | [diff] [blame] | 994 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 995 | |
John McCall | 5126fd0 | 2009-12-30 00:31:22 +0000 | [diff] [blame] | 996 | // The types match. Link up the redeclaration chain if the old |
| 997 | // declaration was a typedef. |
| 998 | // FIXME: this is a potential source of wierdness if the type |
| 999 | // spellings don't match exactly. |
| 1000 | if (isa<TypedefDecl>(Old)) |
| 1001 | New->setPreviousDeclaration(cast<TypedefDecl>(Old)); |
| 1002 | |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 1003 | if (getLangOptions().Microsoft) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1004 | return; |
Eli Friedman | 54ecfce | 2008-06-11 06:20:39 +0000 | [diff] [blame] | 1005 | |
Chris Lattner | 32b0675 | 2009-04-17 22:04:20 +0000 | [diff] [blame] | 1006 | if (getLangOptions().CPlusPlus) { |
Douglas Gregor | 93dda72 | 2010-01-11 21:54:40 +0000 | [diff] [blame] | 1007 | // C++ [dcl.typedef]p2: |
| 1008 | // In a given non-class scope, a typedef specifier can be used to |
| 1009 | // redefine the name of any type declared in that scope to refer |
| 1010 | // to the type to which it already refers. |
Chris Lattner | 32b0675 | 2009-04-17 22:04:20 +0000 | [diff] [blame] | 1011 | if (!isa<CXXRecordDecl>(CurContext)) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1012 | return; |
Douglas Gregor | 93dda72 | 2010-01-11 21:54:40 +0000 | [diff] [blame] | 1013 | |
| 1014 | // C++0x [dcl.typedef]p4: |
| 1015 | // In a given class scope, a typedef specifier can be used to redefine |
| 1016 | // any class-name declared in that scope that is not also a typedef-name |
| 1017 | // to refer to the type to which it already refers. |
| 1018 | // |
| 1019 | // This wording came in via DR424, which was a correction to the |
| 1020 | // wording in DR56, which accidentally banned code like: |
| 1021 | // |
| 1022 | // struct S { |
| 1023 | // typedef struct A { } A; |
| 1024 | // }; |
| 1025 | // |
| 1026 | // in the C++03 standard. We implement the C++0x semantics, which |
| 1027 | // allow the above but disallow |
| 1028 | // |
| 1029 | // struct S { |
| 1030 | // typedef int I; |
| 1031 | // typedef int I; |
| 1032 | // }; |
| 1033 | // |
| 1034 | // since that was the intent of DR56. |
Douglas Gregor | 05f6500 | 2010-01-11 22:30:10 +0000 | [diff] [blame] | 1035 | if (!isa<TypedefDecl >(Old)) |
Douglas Gregor | 93dda72 | 2010-01-11 21:54:40 +0000 | [diff] [blame] | 1036 | return; |
| 1037 | |
Chris Lattner | 32b0675 | 2009-04-17 22:04:20 +0000 | [diff] [blame] | 1038 | Diag(New->getLocation(), diag::err_redefinition) |
| 1039 | << New->getDeclName(); |
| 1040 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1041 | return New->setInvalidDecl(); |
Daniel Dunbar | 2fe0997 | 2008-09-12 18:10:20 +0000 | [diff] [blame] | 1042 | } |
Eli Friedman | 54ecfce | 2008-06-11 06:20:39 +0000 | [diff] [blame] | 1043 | |
Chris Lattner | 32b0675 | 2009-04-17 22:04:20 +0000 | [diff] [blame] | 1044 | // If we have a redefinition of a typedef in C, emit a warning. This warning |
| 1045 | // is normally mapped to an error, but can be controlled with |
Eli Friedman | 340a4e5 | 2009-06-04 23:03:07 +0000 | [diff] [blame] | 1046 | // -Wtypedef-redefinition. If either the original or the redefinition is |
| 1047 | // in a system header, don't emit this for compatibility with GCC. |
Chris Lattner | 6d97e5e | 2010-03-01 20:59:53 +0000 | [diff] [blame] | 1048 | if (getDiagnostics().getSuppressSystemWarnings() && |
Eli Friedman | 340a4e5 | 2009-06-04 23:03:07 +0000 | [diff] [blame] | 1049 | (Context.getSourceManager().isInSystemHeader(Old->getLocation()) || |
| 1050 | Context.getSourceManager().isInSystemHeader(New->getLocation()))) |
Chris Lattner | d0359af | 2009-04-27 01:46:12 +0000 | [diff] [blame] | 1051 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1052 | |
Chris Lattner | 32b0675 | 2009-04-17 22:04:20 +0000 | [diff] [blame] | 1053 | Diag(New->getLocation(), diag::warn_redefinition_of_typedef) |
| 1054 | << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 1055 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1056 | return; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1057 | } |
| 1058 | |
Chris Lattner | 6b6b537 | 2008-06-26 18:38:35 +0000 | [diff] [blame] | 1059 | /// DeclhasAttr - returns true if decl Declaration already has the target |
| 1060 | /// attribute. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1061 | static bool |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 1062 | DeclHasAttr(const Decl *D, const Attr *A) { |
| 1063 | const OwnershipAttr *OA = dyn_cast<OwnershipAttr>(A); |
| 1064 | for (Decl::attr_iterator i = D->attr_begin(), e = D->attr_end(); i != e; ++i) |
| 1065 | if ((*i)->getKind() == A->getKind()) { |
| 1066 | // FIXME: Don't hardcode this check |
| 1067 | if (OA && isa<OwnershipAttr>(*i)) |
| 1068 | return OA->getOwnKind() == cast<OwnershipAttr>(*i)->getOwnKind(); |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 1069 | return true; |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 1070 | } |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 1071 | |
| 1072 | return false; |
| 1073 | } |
| 1074 | |
John McCall | eca5d22 | 2011-03-02 04:00:57 +0000 | [diff] [blame] | 1075 | /// mergeDeclAttributes - Copy attributes from the Old decl to the New one. |
| 1076 | static void mergeDeclAttributes(Decl *newDecl, const Decl *oldDecl, |
| 1077 | ASTContext &C) { |
| 1078 | if (!oldDecl->hasAttrs()) |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 1079 | return; |
John McCall | eca5d22 | 2011-03-02 04:00:57 +0000 | [diff] [blame] | 1080 | |
| 1081 | bool foundAny = newDecl->hasAttrs(); |
| 1082 | |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 1083 | // Ensure that any moving of objects within the allocated map is done before |
| 1084 | // we process them. |
John McCall | eca5d22 | 2011-03-02 04:00:57 +0000 | [diff] [blame] | 1085 | if (!foundAny) newDecl->setAttrs(AttrVec()); |
| 1086 | |
Peter Collingbourne | a97d70b | 2011-01-21 02:08:36 +0000 | [diff] [blame] | 1087 | for (specific_attr_iterator<InheritableAttr> |
John McCall | eca5d22 | 2011-03-02 04:00:57 +0000 | [diff] [blame] | 1088 | i = oldDecl->specific_attr_begin<InheritableAttr>(), |
| 1089 | e = oldDecl->specific_attr_end<InheritableAttr>(); i != e; ++i) { |
| 1090 | if (!DeclHasAttr(newDecl, *i)) { |
| 1091 | InheritableAttr *newAttr = cast<InheritableAttr>((*i)->clone(C)); |
| 1092 | newAttr->setInherited(true); |
| 1093 | newDecl->addAttr(newAttr); |
| 1094 | foundAny = true; |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 1095 | } |
| 1096 | } |
John McCall | eca5d22 | 2011-03-02 04:00:57 +0000 | [diff] [blame] | 1097 | |
| 1098 | if (!foundAny) newDecl->dropAttrs(); |
| 1099 | } |
| 1100 | |
| 1101 | /// mergeParamDeclAttributes - Copy attributes from the old parameter |
| 1102 | /// to the new one. |
| 1103 | static void mergeParamDeclAttributes(ParmVarDecl *newDecl, |
| 1104 | const ParmVarDecl *oldDecl, |
| 1105 | ASTContext &C) { |
| 1106 | if (!oldDecl->hasAttrs()) |
| 1107 | return; |
| 1108 | |
| 1109 | bool foundAny = newDecl->hasAttrs(); |
| 1110 | |
| 1111 | // Ensure that any moving of objects within the allocated map is |
| 1112 | // done before we process them. |
| 1113 | if (!foundAny) newDecl->setAttrs(AttrVec()); |
| 1114 | |
| 1115 | for (specific_attr_iterator<InheritableParamAttr> |
| 1116 | i = oldDecl->specific_attr_begin<InheritableParamAttr>(), |
| 1117 | e = oldDecl->specific_attr_end<InheritableParamAttr>(); i != e; ++i) { |
| 1118 | if (!DeclHasAttr(newDecl, *i)) { |
| 1119 | InheritableAttr *newAttr = cast<InheritableParamAttr>((*i)->clone(C)); |
| 1120 | newAttr->setInherited(true); |
| 1121 | newDecl->addAttr(newAttr); |
| 1122 | foundAny = true; |
| 1123 | } |
| 1124 | } |
| 1125 | |
| 1126 | if (!foundAny) newDecl->dropAttrs(); |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 1127 | } |
| 1128 | |
Dan Gohman | 3c46e8d | 2010-07-26 21:25:24 +0000 | [diff] [blame] | 1129 | namespace { |
| 1130 | |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1131 | /// Used in MergeFunctionDecl to keep track of function parameters in |
| 1132 | /// C. |
| 1133 | struct GNUCompatibleParamWarning { |
| 1134 | ParmVarDecl *OldParm; |
| 1135 | ParmVarDecl *NewParm; |
| 1136 | QualType PromotedType; |
| 1137 | }; |
| 1138 | |
Dan Gohman | 3c46e8d | 2010-07-26 21:25:24 +0000 | [diff] [blame] | 1139 | } |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 1140 | |
| 1141 | /// getSpecialMember - get the special member enum for a method. |
Anders Carlsson | 3b8c53b | 2010-04-22 05:40:53 +0000 | [diff] [blame] | 1142 | Sema::CXXSpecialMember Sema::getSpecialMember(const CXXMethodDecl *MD) { |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 1143 | if (const CXXConstructorDecl *Ctor = dyn_cast<CXXConstructorDecl>(MD)) { |
Douglas Gregor | 9e9199d | 2009-12-22 00:34:07 +0000 | [diff] [blame] | 1144 | if (Ctor->isCopyConstructor()) |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 1145 | return Sema::CXXCopyConstructor; |
Anders Carlsson | 3b8c53b | 2010-04-22 05:40:53 +0000 | [diff] [blame] | 1146 | |
| 1147 | return Sema::CXXConstructor; |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 1148 | } |
| 1149 | |
| 1150 | if (isa<CXXDestructorDecl>(MD)) |
| 1151 | return Sema::CXXDestructor; |
| 1152 | |
Douglas Gregor | 3e9438b | 2010-09-27 22:37:28 +0000 | [diff] [blame] | 1153 | assert(MD->isCopyAssignmentOperator() && |
| 1154 | "Must have copy assignment operator"); |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 1155 | return Sema::CXXCopyAssignment; |
| 1156 | } |
| 1157 | |
Sebastian Redl | 515ddd8 | 2010-06-09 21:17:41 +0000 | [diff] [blame] | 1158 | /// canRedefineFunction - checks if a function can be redefined. Currently, |
Charles Davis | f3f8d2a | 2010-02-18 02:00:42 +0000 | [diff] [blame] | 1159 | /// only extern inline functions can be redefined, and even then only in |
| 1160 | /// GNU89 mode. |
| 1161 | static bool canRedefineFunction(const FunctionDecl *FD, |
| 1162 | const LangOptions& LangOpts) { |
| 1163 | return (LangOpts.GNUMode && !LangOpts.C99 && !LangOpts.CPlusPlus && |
| 1164 | FD->isInlineSpecified() && |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 1165 | FD->getStorageClass() == SC_Extern); |
Charles Davis | f3f8d2a | 2010-02-18 02:00:42 +0000 | [diff] [blame] | 1166 | } |
| 1167 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 1168 | /// MergeFunctionDecl - We just parsed a function 'New' from |
| 1169 | /// declarator D which has the same name and scope as a previous |
| 1170 | /// declaration 'Old'. Figure out how to resolve this situation, |
| 1171 | /// merging decls or emitting diagnostics as appropriate. |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1172 | /// |
| 1173 | /// In C++, New and Old must be declarations that are not |
| 1174 | /// overloaded. Use IsOverload to determine whether New and Old are |
| 1175 | /// overloaded, and to select the Old declaration that New should be |
| 1176 | /// merged with. |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1177 | /// |
| 1178 | /// Returns true if there was an error, false otherwise. |
| 1179 | bool Sema::MergeFunctionDecl(FunctionDecl *New, Decl *OldD) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1180 | // Verify the old decl was also a function. |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 1181 | FunctionDecl *Old = 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1182 | if (FunctionTemplateDecl *OldFunctionTemplate |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 1183 | = dyn_cast<FunctionTemplateDecl>(OldD)) |
| 1184 | Old = OldFunctionTemplate->getTemplatedDecl(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1185 | else |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 1186 | Old = dyn_cast<FunctionDecl>(OldD); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1187 | if (!Old) { |
John McCall | 41ce66f | 2009-12-10 19:51:03 +0000 | [diff] [blame] | 1188 | if (UsingShadowDecl *Shadow = dyn_cast<UsingShadowDecl>(OldD)) { |
| 1189 | Diag(New->getLocation(), diag::err_using_decl_conflict_reverse); |
| 1190 | Diag(Shadow->getTargetDecl()->getLocation(), |
| 1191 | diag::note_using_decl_target); |
| 1192 | Diag(Shadow->getUsingDecl()->getLocation(), |
| 1193 | diag::note_using_decl) << 0; |
| 1194 | return true; |
| 1195 | } |
| 1196 | |
Chris Lattner | 5dc266a | 2008-11-20 06:13:02 +0000 | [diff] [blame] | 1197 | Diag(New->getLocation(), diag::err_redefinition_different_kind) |
Chris Lattner | 08631c5 | 2008-11-23 21:45:46 +0000 | [diff] [blame] | 1198 | << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 1199 | Diag(OldD->getLocation(), diag::note_previous_definition); |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1200 | return true; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1201 | } |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1202 | |
| 1203 | // Determine whether the previous declaration was a definition, |
| 1204 | // implicit declaration, or a declaration. |
| 1205 | diag::kind PrevDiag; |
| 1206 | if (Old->isThisDeclarationADefinition()) |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 1207 | PrevDiag = diag::note_previous_definition; |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1208 | else if (Old->isImplicit()) |
| 1209 | PrevDiag = diag::note_previous_implicit_declaration; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1210 | else |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 1211 | PrevDiag = diag::note_previous_declaration; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1212 | |
Chris Lattner | 8bcfc5b | 2008-04-06 23:10:54 +0000 | [diff] [blame] | 1213 | QualType OldQType = Context.getCanonicalType(Old->getType()); |
| 1214 | QualType NewQType = Context.getCanonicalType(New->getType()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1215 | |
Charles Davis | f3f8d2a | 2010-02-18 02:00:42 +0000 | [diff] [blame] | 1216 | // Don't complain about this if we're in GNU89 mode and the old function |
| 1217 | // is an extern inline function. |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1218 | if (!isa<CXXMethodDecl>(New) && !isa<CXXMethodDecl>(Old) && |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 1219 | New->getStorageClass() == SC_Static && |
| 1220 | Old->getStorageClass() != SC_Static && |
Charles Davis | f3f8d2a | 2010-02-18 02:00:42 +0000 | [diff] [blame] | 1221 | !canRedefineFunction(Old, getLangOptions())) { |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1222 | Diag(New->getLocation(), diag::err_static_non_static) |
| 1223 | << New; |
| 1224 | Diag(Old->getLocation(), PrevDiag); |
| 1225 | return true; |
| 1226 | } |
| 1227 | |
John McCall | f82b4e8 | 2010-02-04 05:44:44 +0000 | [diff] [blame] | 1228 | // If a function is first declared with a calling convention, but is |
| 1229 | // later declared or defined without one, the second decl assumes the |
| 1230 | // calling convention of the first. |
| 1231 | // |
| 1232 | // For the new decl, we have to look at the NON-canonical type to tell the |
| 1233 | // difference between a function that really doesn't have a calling |
| 1234 | // convention and one that is declared cdecl. That's because in |
| 1235 | // canonicalization (see ASTContext.cpp), cdecl is canonicalized away |
| 1236 | // because it is the default calling convention. |
| 1237 | // |
| 1238 | // Note also that we DO NOT return at this point, because we still have |
| 1239 | // other tests to run. |
John McCall | e6a365d | 2010-12-19 02:44:49 +0000 | [diff] [blame] | 1240 | const FunctionType *OldType = cast<FunctionType>(OldQType); |
John McCall | f82b4e8 | 2010-02-04 05:44:44 +0000 | [diff] [blame] | 1241 | const FunctionType *NewType = New->getType()->getAs<FunctionType>(); |
John McCall | e6a365d | 2010-12-19 02:44:49 +0000 | [diff] [blame] | 1242 | FunctionType::ExtInfo OldTypeInfo = OldType->getExtInfo(); |
| 1243 | FunctionType::ExtInfo NewTypeInfo = NewType->getExtInfo(); |
| 1244 | bool RequiresAdjustment = false; |
Rafael Espindola | 264ba48 | 2010-03-30 20:24:48 +0000 | [diff] [blame] | 1245 | if (OldTypeInfo.getCC() != CC_Default && |
| 1246 | NewTypeInfo.getCC() == CC_Default) { |
John McCall | e6a365d | 2010-12-19 02:44:49 +0000 | [diff] [blame] | 1247 | NewTypeInfo = NewTypeInfo.withCallingConv(OldTypeInfo.getCC()); |
| 1248 | RequiresAdjustment = true; |
Rafael Espindola | 264ba48 | 2010-03-30 20:24:48 +0000 | [diff] [blame] | 1249 | } else if (!Context.isSameCallConv(OldTypeInfo.getCC(), |
| 1250 | NewTypeInfo.getCC())) { |
John McCall | f82b4e8 | 2010-02-04 05:44:44 +0000 | [diff] [blame] | 1251 | // Calling conventions really aren't compatible, so complain. |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame] | 1252 | Diag(New->getLocation(), diag::err_cconv_change) |
Rafael Espindola | 264ba48 | 2010-03-30 20:24:48 +0000 | [diff] [blame] | 1253 | << FunctionType::getNameForCallConv(NewTypeInfo.getCC()) |
| 1254 | << (OldTypeInfo.getCC() == CC_Default) |
| 1255 | << (OldTypeInfo.getCC() == CC_Default ? "" : |
| 1256 | FunctionType::getNameForCallConv(OldTypeInfo.getCC())); |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame] | 1257 | Diag(Old->getLocation(), diag::note_previous_declaration); |
John McCall | f82b4e8 | 2010-02-04 05:44:44 +0000 | [diff] [blame] | 1258 | return true; |
| 1259 | } |
| 1260 | |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame] | 1261 | // FIXME: diagnose the other way around? |
John McCall | e6a365d | 2010-12-19 02:44:49 +0000 | [diff] [blame] | 1262 | if (OldTypeInfo.getNoReturn() && !NewTypeInfo.getNoReturn()) { |
| 1263 | NewTypeInfo = NewTypeInfo.withNoReturn(true); |
| 1264 | RequiresAdjustment = true; |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame] | 1265 | } |
| 1266 | |
Douglas Gregor | d2c6490 | 2010-06-18 21:30:25 +0000 | [diff] [blame] | 1267 | // Merge regparm attribute. |
John McCall | e6a365d | 2010-12-19 02:44:49 +0000 | [diff] [blame] | 1268 | if (OldTypeInfo.getRegParm() != NewTypeInfo.getRegParm()) { |
| 1269 | if (NewTypeInfo.getRegParm()) { |
Douglas Gregor | d2c6490 | 2010-06-18 21:30:25 +0000 | [diff] [blame] | 1270 | Diag(New->getLocation(), diag::err_regparm_mismatch) |
| 1271 | << NewType->getRegParmType() |
| 1272 | << OldType->getRegParmType(); |
| 1273 | Diag(Old->getLocation(), diag::note_previous_declaration); |
| 1274 | return true; |
| 1275 | } |
John McCall | e6a365d | 2010-12-19 02:44:49 +0000 | [diff] [blame] | 1276 | |
| 1277 | NewTypeInfo = NewTypeInfo.withRegParm(OldTypeInfo.getRegParm()); |
| 1278 | RequiresAdjustment = true; |
| 1279 | } |
| 1280 | |
| 1281 | if (RequiresAdjustment) { |
| 1282 | NewType = Context.adjustFunctionType(NewType, NewTypeInfo); |
| 1283 | New->setType(QualType(NewType, 0)); |
| 1284 | NewQType = Context.getCanonicalType(New->getType()); |
Douglas Gregor | d2c6490 | 2010-06-18 21:30:25 +0000 | [diff] [blame] | 1285 | } |
| 1286 | |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1287 | if (getLangOptions().CPlusPlus) { |
| 1288 | // (C++98 13.1p2): |
| 1289 | // Certain function declarations cannot be overloaded: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1290 | // -- Function declarations that differ only in the return type |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1291 | // cannot be overloaded. |
John McCall | e6a365d | 2010-12-19 02:44:49 +0000 | [diff] [blame] | 1292 | QualType OldReturnType = OldType->getResultType(); |
| 1293 | QualType NewReturnType = cast<FunctionType>(NewQType)->getResultType(); |
Fariborz Jahanian | 2390a72 | 2010-05-19 21:37:30 +0000 | [diff] [blame] | 1294 | QualType ResQT; |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1295 | if (OldReturnType != NewReturnType) { |
Fariborz Jahanian | 2390a72 | 2010-05-19 21:37:30 +0000 | [diff] [blame] | 1296 | if (NewReturnType->isObjCObjectPointerType() |
| 1297 | && OldReturnType->isObjCObjectPointerType()) |
| 1298 | ResQT = Context.mergeObjCGCQualifiers(NewQType, OldQType); |
| 1299 | if (ResQT.isNull()) { |
Argyrios Kyrtzidis | 1de34dd | 2011-02-05 05:54:49 +0000 | [diff] [blame] | 1300 | if (New->isCXXClassMember() && New->isOutOfLine()) |
| 1301 | Diag(New->getLocation(), |
| 1302 | diag::err_member_def_does_not_match_ret_type) << New; |
| 1303 | else |
| 1304 | Diag(New->getLocation(), diag::err_ovl_diff_return_type); |
Fariborz Jahanian | 2390a72 | 2010-05-19 21:37:30 +0000 | [diff] [blame] | 1305 | Diag(Old->getLocation(), PrevDiag) << Old << Old->getType(); |
| 1306 | return true; |
| 1307 | } |
| 1308 | else |
| 1309 | NewQType = ResQT; |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1310 | } |
| 1311 | |
| 1312 | const CXXMethodDecl* OldMethod = dyn_cast<CXXMethodDecl>(Old); |
John McCall | 3d04336 | 2010-04-13 07:45:41 +0000 | [diff] [blame] | 1313 | CXXMethodDecl* NewMethod = dyn_cast<CXXMethodDecl>(New); |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 1314 | if (OldMethod && NewMethod) { |
John McCall | 3d04336 | 2010-04-13 07:45:41 +0000 | [diff] [blame] | 1315 | // Preserve triviality. |
| 1316 | NewMethod->setTrivial(OldMethod->isTrivial()); |
| 1317 | |
| 1318 | bool isFriend = NewMethod->getFriendObjectKind(); |
| 1319 | |
| 1320 | if (!isFriend && NewMethod->getLexicalDeclContext()->isRecord()) { |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 1321 | // -- Member function declarations with the same name and the |
| 1322 | // same parameter types cannot be overloaded if any of them |
| 1323 | // is a static member function declaration. |
| 1324 | if (OldMethod->isStatic() || NewMethod->isStatic()) { |
| 1325 | Diag(New->getLocation(), diag::err_ovl_static_nonstatic_member); |
| 1326 | Diag(Old->getLocation(), PrevDiag) << Old << Old->getType(); |
| 1327 | return true; |
| 1328 | } |
| 1329 | |
| 1330 | // C++ [class.mem]p1: |
| 1331 | // [...] A member shall not be declared twice in the |
| 1332 | // member-specification, except that a nested class or member |
| 1333 | // class template can be declared and then later defined. |
| 1334 | unsigned NewDiag; |
| 1335 | if (isa<CXXConstructorDecl>(OldMethod)) |
| 1336 | NewDiag = diag::err_constructor_redeclared; |
| 1337 | else if (isa<CXXDestructorDecl>(NewMethod)) |
| 1338 | NewDiag = diag::err_destructor_redeclared; |
| 1339 | else if (isa<CXXConversionDecl>(NewMethod)) |
| 1340 | NewDiag = diag::err_conv_function_redeclared; |
| 1341 | else |
| 1342 | NewDiag = diag::err_member_redeclared; |
| 1343 | |
| 1344 | Diag(New->getLocation(), NewDiag); |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1345 | Diag(Old->getLocation(), PrevDiag) << Old << Old->getType(); |
John McCall | 3d04336 | 2010-04-13 07:45:41 +0000 | [diff] [blame] | 1346 | |
| 1347 | // Complain if this is an explicit declaration of a special |
| 1348 | // member that was initially declared implicitly. |
| 1349 | // |
| 1350 | // As an exception, it's okay to befriend such methods in order |
| 1351 | // to permit the implicit constructor/destructor/operator calls. |
| 1352 | } else if (OldMethod->isImplicit()) { |
| 1353 | if (isFriend) { |
| 1354 | NewMethod->setImplicit(); |
| 1355 | } else { |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 1356 | Diag(NewMethod->getLocation(), |
| 1357 | diag::err_definition_of_implicitly_declared_member) |
Anders Carlsson | 3b8c53b | 2010-04-22 05:40:53 +0000 | [diff] [blame] | 1358 | << New << getSpecialMember(OldMethod); |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 1359 | return true; |
| 1360 | } |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1361 | } |
| 1362 | } |
| 1363 | |
| 1364 | // (C++98 8.3.5p3): |
| 1365 | // All declarations for a function shall agree exactly in both the |
| 1366 | // return type and the parameter-type-list. |
John McCall | e6a365d | 2010-12-19 02:44:49 +0000 | [diff] [blame] | 1367 | // We also want to respect all the extended bits except noreturn. |
| 1368 | |
| 1369 | // noreturn should now match unless the old type info didn't have it. |
| 1370 | QualType OldQTypeForComparison = OldQType; |
| 1371 | if (!OldTypeInfo.getNoReturn() && NewTypeInfo.getNoReturn()) { |
| 1372 | assert(OldQType == QualType(OldType, 0)); |
| 1373 | const FunctionType *OldTypeForComparison |
| 1374 | = Context.adjustFunctionType(OldType, OldTypeInfo.withNoReturn(true)); |
| 1375 | OldQTypeForComparison = QualType(OldTypeForComparison, 0); |
| 1376 | assert(OldQTypeForComparison.isCanonical()); |
| 1377 | } |
| 1378 | |
| 1379 | if (OldQTypeForComparison == NewQType) |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1380 | return MergeCompatibleFunctionDecls(New, Old); |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1381 | |
| 1382 | // Fall through for conflicting redeclarations and redefinitions. |
Douglas Gregor | f009795 | 2008-04-21 02:02:58 +0000 | [diff] [blame] | 1383 | } |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 1384 | |
| 1385 | // C: Function types need to be compatible, not identical. This handles |
Steve Naroff | adbbd0c | 2008-01-14 20:51:29 +0000 | [diff] [blame] | 1386 | // duplicate function decls like "void f(int); void f(enum X);" properly. |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 1387 | if (!getLangOptions().CPlusPlus && |
Eli Friedman | 3d815e7 | 2008-08-22 00:56:42 +0000 | [diff] [blame] | 1388 | Context.typesAreCompatible(OldQType, NewQType)) { |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 1389 | const FunctionType *OldFuncType = OldQType->getAs<FunctionType>(); |
| 1390 | const FunctionType *NewFuncType = NewQType->getAs<FunctionType>(); |
Douglas Gregor | 72564e7 | 2009-02-26 23:50:07 +0000 | [diff] [blame] | 1391 | const FunctionProtoType *OldProto = 0; |
| 1392 | if (isa<FunctionNoProtoType>(NewFuncType) && |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1393 | (OldProto = dyn_cast<FunctionProtoType>(OldFuncType))) { |
Douglas Gregor | 6871981 | 2009-02-16 18:20:44 +0000 | [diff] [blame] | 1394 | // The old declaration provided a function prototype, but the |
| 1395 | // new declaration does not. Merge in the prototype. |
Sebastian Redl | 465226e | 2009-05-27 22:11:52 +0000 | [diff] [blame] | 1396 | assert(!OldProto->hasExceptionSpec() && "Exception spec in C"); |
Douglas Gregor | 6871981 | 2009-02-16 18:20:44 +0000 | [diff] [blame] | 1397 | llvm::SmallVector<QualType, 16> ParamTypes(OldProto->arg_type_begin(), |
| 1398 | OldProto->arg_type_end()); |
| 1399 | NewQType = Context.getFunctionType(NewFuncType->getResultType(), |
Jay Foad | beaaccd | 2009-05-21 09:52:38 +0000 | [diff] [blame] | 1400 | ParamTypes.data(), ParamTypes.size(), |
John McCall | e23cf43 | 2010-12-14 08:05:40 +0000 | [diff] [blame] | 1401 | OldProto->getExtProtoInfo()); |
Douglas Gregor | 6871981 | 2009-02-16 18:20:44 +0000 | [diff] [blame] | 1402 | New->setType(NewQType); |
Anders Carlsson | a75e853 | 2009-05-14 21:46:00 +0000 | [diff] [blame] | 1403 | New->setHasInheritedPrototype(); |
Douglas Gregor | 450da98 | 2009-02-16 20:58:07 +0000 | [diff] [blame] | 1404 | |
| 1405 | // Synthesize a parameter for each argument type. |
| 1406 | llvm::SmallVector<ParmVarDecl*, 16> Params; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1407 | for (FunctionProtoType::arg_type_iterator |
| 1408 | ParamType = OldProto->arg_type_begin(), |
Douglas Gregor | 450da98 | 2009-02-16 20:58:07 +0000 | [diff] [blame] | 1409 | ParamEnd = OldProto->arg_type_end(); |
| 1410 | ParamType != ParamEnd; ++ParamType) { |
| 1411 | ParmVarDecl *Param = ParmVarDecl::Create(Context, New, |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 1412 | SourceLocation(), |
Douglas Gregor | 450da98 | 2009-02-16 20:58:07 +0000 | [diff] [blame] | 1413 | SourceLocation(), 0, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 1414 | *ParamType, /*TInfo=*/0, |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 1415 | SC_None, SC_None, |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 1416 | 0); |
Douglas Gregor | 450da98 | 2009-02-16 20:58:07 +0000 | [diff] [blame] | 1417 | Param->setImplicit(); |
| 1418 | Params.push_back(Param); |
| 1419 | } |
| 1420 | |
Douglas Gregor | 838db38 | 2010-02-11 01:19:42 +0000 | [diff] [blame] | 1421 | New->setParams(Params.data(), Params.size()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1422 | } |
Douglas Gregor | 6871981 | 2009-02-16 18:20:44 +0000 | [diff] [blame] | 1423 | |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1424 | return MergeCompatibleFunctionDecls(New, Old); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 1425 | } |
Chris Lattner | e3995fe | 2007-11-06 06:07:26 +0000 | [diff] [blame] | 1426 | |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1427 | // GNU C permits a K&R definition to follow a prototype declaration |
| 1428 | // if the declared types of the parameters in the K&R definition |
| 1429 | // match the types in the prototype declaration, even when the |
| 1430 | // promoted types of the parameters from the K&R definition differ |
| 1431 | // from the types in the prototype. GCC then keeps the types from |
| 1432 | // the prototype. |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 1433 | // |
| 1434 | // If a variadic prototype is followed by a non-variadic K&R definition, |
| 1435 | // the K&R definition becomes variadic. This is sort of an edge case, but |
| 1436 | // it's legal per the standard depending on how you read C99 6.7.5.3p15 and |
| 1437 | // C99 6.9.1p8. |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1438 | if (!getLangOptions().CPlusPlus && |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1439 | Old->hasPrototype() && !New->hasPrototype() && |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 1440 | New->getType()->getAs<FunctionProtoType>() && |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1441 | Old->getNumParams() == New->getNumParams()) { |
| 1442 | llvm::SmallVector<QualType, 16> ArgTypes; |
| 1443 | llvm::SmallVector<GNUCompatibleParamWarning, 16> Warnings; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1444 | const FunctionProtoType *OldProto |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 1445 | = Old->getType()->getAs<FunctionProtoType>(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1446 | const FunctionProtoType *NewProto |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 1447 | = New->getType()->getAs<FunctionProtoType>(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1448 | |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1449 | // Determine whether this is the GNU C extension. |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 1450 | QualType MergedReturn = Context.mergeTypes(OldProto->getResultType(), |
| 1451 | NewProto->getResultType()); |
| 1452 | bool LooseCompatible = !MergedReturn.isNull(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1453 | for (unsigned Idx = 0, End = Old->getNumParams(); |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 1454 | LooseCompatible && Idx != End; ++Idx) { |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1455 | ParmVarDecl *OldParm = Old->getParamDecl(Idx); |
| 1456 | ParmVarDecl *NewParm = New->getParamDecl(Idx); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1457 | if (Context.typesAreCompatible(OldParm->getType(), |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1458 | NewProto->getArgType(Idx))) { |
| 1459 | ArgTypes.push_back(NewParm->getType()); |
| 1460 | } else if (Context.typesAreCompatible(OldParm->getType(), |
Douglas Gregor | 447234d | 2010-07-29 15:18:02 +0000 | [diff] [blame] | 1461 | NewParm->getType(), |
| 1462 | /*CompareUnqualified=*/true)) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1463 | GNUCompatibleParamWarning Warn |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1464 | = { OldParm, NewParm, NewProto->getArgType(Idx) }; |
| 1465 | Warnings.push_back(Warn); |
| 1466 | ArgTypes.push_back(NewParm->getType()); |
| 1467 | } else |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 1468 | LooseCompatible = false; |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1469 | } |
| 1470 | |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 1471 | if (LooseCompatible) { |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1472 | for (unsigned Warn = 0; Warn < Warnings.size(); ++Warn) { |
| 1473 | Diag(Warnings[Warn].NewParm->getLocation(), |
| 1474 | diag::ext_param_promoted_not_compatible_with_prototype) |
| 1475 | << Warnings[Warn].PromotedType |
| 1476 | << Warnings[Warn].OldParm->getType(); |
Douglas Gregor | 447234d | 2010-07-29 15:18:02 +0000 | [diff] [blame] | 1477 | if (Warnings[Warn].OldParm->getLocation().isValid()) |
| 1478 | Diag(Warnings[Warn].OldParm->getLocation(), |
| 1479 | diag::note_previous_declaration); |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1480 | } |
| 1481 | |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 1482 | New->setType(Context.getFunctionType(MergedReturn, &ArgTypes[0], |
| 1483 | ArgTypes.size(), |
John McCall | e23cf43 | 2010-12-14 08:05:40 +0000 | [diff] [blame] | 1484 | OldProto->getExtProtoInfo())); |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1485 | return MergeCompatibleFunctionDecls(New, Old); |
| 1486 | } |
| 1487 | |
| 1488 | // Fall through to diagnose conflicting types. |
| 1489 | } |
| 1490 | |
Steve Naroff | 837618c | 2008-01-16 15:01:34 +0000 | [diff] [blame] | 1491 | // A function that has already been declared has been redeclared or defined |
| 1492 | // with a different type- show appropriate diagnostic |
Douglas Gregor | 7814e6d | 2009-09-12 00:22:50 +0000 | [diff] [blame] | 1493 | if (unsigned BuiltinID = Old->getBuiltinID()) { |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1494 | // The user has declared a builtin function with an incompatible |
| 1495 | // signature. |
| 1496 | if (Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) { |
| 1497 | // The function the user is redeclaring is a library-defined |
| 1498 | // function like 'malloc' or 'printf'. Warn about the |
Douglas Gregor | 374e156 | 2009-03-23 17:47:24 +0000 | [diff] [blame] | 1499 | // redeclaration, then pretend that we don't know about this |
| 1500 | // library built-in. |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1501 | Diag(New->getLocation(), diag::warn_redecl_library_builtin) << New; |
| 1502 | Diag(Old->getLocation(), diag::note_previous_builtin_declaration) |
| 1503 | << Old << Old->getType(); |
Douglas Gregor | 374e156 | 2009-03-23 17:47:24 +0000 | [diff] [blame] | 1504 | New->getIdentifier()->setBuiltinID(Builtin::NotBuiltin); |
| 1505 | Old->setInvalidDecl(); |
| 1506 | return false; |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1507 | } |
Steve Naroff | 837618c | 2008-01-16 15:01:34 +0000 | [diff] [blame] | 1508 | |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1509 | PrevDiag = diag::note_previous_builtin_declaration; |
| 1510 | } |
| 1511 | |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 1512 | Diag(New->getLocation(), diag::err_conflicting_types) << New->getDeclName(); |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1513 | Diag(Old->getLocation(), PrevDiag) << Old << Old->getType(); |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1514 | return true; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1515 | } |
| 1516 | |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1517 | /// \brief Completes the merge of two function declarations that are |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1518 | /// known to be compatible. |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1519 | /// |
| 1520 | /// This routine handles the merging of attributes and other |
| 1521 | /// properties of function declarations form the old declaration to |
| 1522 | /// the new declaration, once we know that New is in fact a |
| 1523 | /// redeclaration of Old. |
| 1524 | /// |
| 1525 | /// \returns false |
| 1526 | bool Sema::MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old) { |
| 1527 | // Merge the attributes |
John McCall | eca5d22 | 2011-03-02 04:00:57 +0000 | [diff] [blame] | 1528 | mergeDeclAttributes(New, Old, Context); |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1529 | |
| 1530 | // Merge the storage class. |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 1531 | if (Old->getStorageClass() != SC_Extern && |
| 1532 | Old->getStorageClass() != SC_None) |
Douglas Gregor | 9f9bf25 | 2009-04-28 06:37:30 +0000 | [diff] [blame] | 1533 | New->setStorageClass(Old->getStorageClass()); |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1534 | |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1535 | // Merge "pure" flag. |
| 1536 | if (Old->isPure()) |
| 1537 | New->setPure(); |
| 1538 | |
| 1539 | // Merge the "deleted" flag. |
| 1540 | if (Old->isDeleted()) |
| 1541 | New->setDeleted(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1542 | |
John McCall | eca5d22 | 2011-03-02 04:00:57 +0000 | [diff] [blame] | 1543 | // Merge attributes from the parameters. These can mismatch with K&R |
| 1544 | // declarations. |
| 1545 | if (New->getNumParams() == Old->getNumParams()) |
| 1546 | for (unsigned i = 0, e = New->getNumParams(); i != e; ++i) |
| 1547 | mergeParamDeclAttributes(New->getParamDecl(i), Old->getParamDecl(i), |
| 1548 | Context); |
| 1549 | |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1550 | if (getLangOptions().CPlusPlus) |
| 1551 | return MergeCXXFunctionDecl(New, Old); |
| 1552 | |
| 1553 | return false; |
| 1554 | } |
| 1555 | |
John McCall | eca5d22 | 2011-03-02 04:00:57 +0000 | [diff] [blame] | 1556 | void Sema::mergeObjCMethodDecls(ObjCMethodDecl *newMethod, |
| 1557 | const ObjCMethodDecl *oldMethod) { |
| 1558 | // Merge the attributes. |
| 1559 | mergeDeclAttributes(newMethod, oldMethod, Context); |
| 1560 | |
| 1561 | // Merge attributes from the parameters. |
| 1562 | for (ObjCMethodDecl::param_iterator oi = oldMethod->param_begin(), |
| 1563 | ni = newMethod->param_begin(), ne = newMethod->param_end(); |
| 1564 | ni != ne; ++ni, ++oi) |
| 1565 | mergeParamDeclAttributes(*ni, *oi, Context); |
| 1566 | } |
| 1567 | |
Sebastian Redl | 60618fa | 2011-03-12 11:50:43 +0000 | [diff] [blame] | 1568 | /// MergeVarDeclTypes - We parsed a variable 'New' which has the same name and |
| 1569 | /// 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] | 1570 | /// emitting diagnostics as appropriate. |
| 1571 | /// |
| 1572 | /// Declarations using the auto type specifier (C++ [decl.spec.auto]) call back |
| 1573 | /// to here in AddInitializerToDecl and AddCXXDirectInitializerToDecl. We can't |
| 1574 | /// check them before the initializer is attached. |
| 1575 | /// |
| 1576 | void Sema::MergeVarDeclTypes(VarDecl *New, VarDecl *Old) { |
| 1577 | if (New->isInvalidDecl() || Old->isInvalidDecl()) |
| 1578 | return; |
| 1579 | |
| 1580 | QualType MergedT; |
| 1581 | if (getLangOptions().CPlusPlus) { |
| 1582 | AutoType *AT = New->getType()->getContainedAutoType(); |
| 1583 | if (AT && !AT->isDeduced()) { |
| 1584 | // We don't know what the new type is until the initializer is attached. |
| 1585 | return; |
Sebastian Redl | 60618fa | 2011-03-12 11:50:43 +0000 | [diff] [blame] | 1586 | } else if (Context.hasSameType(New->getType(), Old->getType())) { |
| 1587 | // These could still be something that needs exception specs checked. |
| 1588 | return MergeVarDeclExceptionSpecs(New, Old); |
| 1589 | } |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 1590 | // C++ [basic.link]p10: |
| 1591 | // [...] the types specified by all declarations referring to a given |
| 1592 | // object or function shall be identical, except that declarations for an |
| 1593 | // array object can specify array types that differ by the presence or |
| 1594 | // absence of a major array bound (8.3.4). |
| 1595 | else if (Old->getType()->isIncompleteArrayType() && |
| 1596 | New->getType()->isArrayType()) { |
| 1597 | CanQual<ArrayType> OldArray |
| 1598 | = Context.getCanonicalType(Old->getType())->getAs<ArrayType>(); |
| 1599 | CanQual<ArrayType> NewArray |
| 1600 | = Context.getCanonicalType(New->getType())->getAs<ArrayType>(); |
| 1601 | if (OldArray->getElementType() == NewArray->getElementType()) |
| 1602 | MergedT = New->getType(); |
| 1603 | } else if (Old->getType()->isArrayType() && |
| 1604 | New->getType()->isIncompleteArrayType()) { |
| 1605 | CanQual<ArrayType> OldArray |
| 1606 | = Context.getCanonicalType(Old->getType())->getAs<ArrayType>(); |
| 1607 | CanQual<ArrayType> NewArray |
| 1608 | = Context.getCanonicalType(New->getType())->getAs<ArrayType>(); |
| 1609 | if (OldArray->getElementType() == NewArray->getElementType()) |
| 1610 | MergedT = Old->getType(); |
| 1611 | } else if (New->getType()->isObjCObjectPointerType() |
| 1612 | && Old->getType()->isObjCObjectPointerType()) { |
| 1613 | MergedT = Context.mergeObjCGCQualifiers(New->getType(), |
| 1614 | Old->getType()); |
| 1615 | } |
| 1616 | } else { |
| 1617 | MergedT = Context.mergeTypes(New->getType(), Old->getType()); |
| 1618 | } |
| 1619 | if (MergedT.isNull()) { |
| 1620 | Diag(New->getLocation(), diag::err_redefinition_different_type) |
| 1621 | << New->getDeclName(); |
| 1622 | Diag(Old->getLocation(), diag::note_previous_definition); |
| 1623 | return New->setInvalidDecl(); |
| 1624 | } |
| 1625 | New->setType(MergedT); |
| 1626 | } |
| 1627 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1628 | /// MergeVarDecl - We just parsed a variable 'New' which has the same name |
| 1629 | /// and scope as a previous declaration 'Old'. Figure out how to resolve this |
| 1630 | /// situation, merging decls or emitting diagnostics as appropriate. |
| 1631 | /// |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1632 | /// Tentative definition rules (C99 6.9.2p2) are checked by |
| 1633 | /// FinalizeDeclaratorGroup. Unfortunately, we can't analyze tentative |
Steve Naroff | ff9eb1f | 2008-08-08 17:50:35 +0000 | [diff] [blame] | 1634 | /// definitions here, since the initializer hasn't been attached. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1635 | /// |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1636 | void Sema::MergeVarDecl(VarDecl *New, LookupResult &Previous) { |
| 1637 | // If the new decl is already invalid, don't do any other checking. |
| 1638 | if (New->isInvalidDecl()) |
| 1639 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1640 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1641 | // Verify the old decl was also a variable. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1642 | VarDecl *Old = 0; |
| 1643 | if (!Previous.isSingleResult() || |
| 1644 | !(Old = dyn_cast<VarDecl>(Previous.getFoundDecl()))) { |
Chris Lattner | f3a41af | 2008-11-20 06:38:18 +0000 | [diff] [blame] | 1645 | Diag(New->getLocation(), diag::err_redefinition_different_kind) |
Chris Lattner | 08631c5 | 2008-11-23 21:45:46 +0000 | [diff] [blame] | 1646 | << New->getDeclName(); |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1647 | Diag(Previous.getRepresentativeDecl()->getLocation(), |
| 1648 | diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1649 | return New->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1650 | } |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 1651 | |
Douglas Gregor | 7f6ff02 | 2010-08-30 14:32:14 +0000 | [diff] [blame] | 1652 | // C++ [class.mem]p1: |
| 1653 | // A member shall not be declared twice in the member-specification [...] |
| 1654 | // |
| 1655 | // Here, we need only consider static data members. |
| 1656 | if (Old->isStaticDataMember() && !New->isOutOfLine()) { |
| 1657 | Diag(New->getLocation(), diag::err_duplicate_member) |
| 1658 | << New->getIdentifier(); |
| 1659 | Diag(Old->getLocation(), diag::note_previous_declaration); |
| 1660 | New->setInvalidDecl(); |
| 1661 | } |
| 1662 | |
John McCall | eca5d22 | 2011-03-02 04:00:57 +0000 | [diff] [blame] | 1663 | mergeDeclAttributes(New, Old, Context); |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 1664 | |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 1665 | // Merge the types. |
| 1666 | MergeVarDeclTypes(New, Old); |
| 1667 | if (New->isInvalidDecl()) |
| 1668 | return; |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 1669 | |
Steve Naroff | b7b032e | 2008-01-30 00:44:01 +0000 | [diff] [blame] | 1670 | // 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] | 1671 | if (New->getStorageClass() == SC_Static && |
| 1672 | (Old->getStorageClass() == SC_None || Old->hasExternalStorage())) { |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 1673 | Diag(New->getLocation(), diag::err_static_non_static) << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 1674 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1675 | return New->setInvalidDecl(); |
Steve Naroff | b7b032e | 2008-01-30 00:44:01 +0000 | [diff] [blame] | 1676 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1677 | // C99 6.2.2p4: |
Douglas Gregor | 5ef122e | 2009-03-19 22:01:50 +0000 | [diff] [blame] | 1678 | // For an identifier declared with the storage-class specifier |
| 1679 | // extern in a scope in which a prior declaration of that |
| 1680 | // identifier is visible,23) if the prior declaration specifies |
| 1681 | // internal or external linkage, the linkage of the identifier at |
| 1682 | // the later declaration is the same as the linkage specified at |
| 1683 | // the prior declaration. If no prior declaration is visible, or |
| 1684 | // if the prior declaration specifies no linkage, then the |
| 1685 | // identifier has external linkage. |
Douglas Gregor | 38179b2 | 2009-03-23 16:17:01 +0000 | [diff] [blame] | 1686 | if (New->hasExternalStorage() && Old->hasLinkage()) |
Douglas Gregor | 5ef122e | 2009-03-19 22:01:50 +0000 | [diff] [blame] | 1687 | /* Okay */; |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 1688 | else if (New->getStorageClass() != SC_Static && |
| 1689 | Old->getStorageClass() == SC_Static) { |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 1690 | Diag(New->getLocation(), diag::err_non_static_static) << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 1691 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1692 | return New->setInvalidDecl(); |
Steve Naroff | b7b032e | 2008-01-30 00:44:01 +0000 | [diff] [blame] | 1693 | } |
Daniel Dunbar | 5466c7b | 2009-04-14 02:25:56 +0000 | [diff] [blame] | 1694 | |
Argyrios Kyrtzidis | 6684d85 | 2011-01-31 07:04:46 +0000 | [diff] [blame] | 1695 | // Check if extern is followed by non-extern and vice-versa. |
| 1696 | if (New->hasExternalStorage() && |
| 1697 | !Old->hasLinkage() && Old->isLocalVarDecl()) { |
| 1698 | Diag(New->getLocation(), diag::err_extern_non_extern) << New->getDeclName(); |
| 1699 | Diag(Old->getLocation(), diag::note_previous_definition); |
| 1700 | return New->setInvalidDecl(); |
| 1701 | } |
| 1702 | if (Old->hasExternalStorage() && |
| 1703 | !New->hasLinkage() && New->isLocalVarDecl()) { |
| 1704 | Diag(New->getLocation(), diag::err_non_extern_extern) << New->getDeclName(); |
| 1705 | Diag(Old->getLocation(), diag::note_previous_definition); |
| 1706 | return New->setInvalidDecl(); |
| 1707 | } |
| 1708 | |
Steve Naroff | 094cefb | 2008-09-17 14:05:40 +0000 | [diff] [blame] | 1709 | // Variables with external linkage are analyzed in FinalizeDeclaratorGroup. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1710 | |
Daniel Dunbar | 5466c7b | 2009-04-14 02:25:56 +0000 | [diff] [blame] | 1711 | // FIXME: The test for external storage here seems wrong? We still |
| 1712 | // need to check for mismatches. |
| 1713 | if (!New->hasExternalStorage() && !New->isFileVarDecl() && |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 1714 | // Don't complain about out-of-line definitions of static members. |
| 1715 | !(Old->getLexicalDeclContext()->isRecord() && |
| 1716 | !New->getLexicalDeclContext()->isRecord())) { |
Chris Lattner | 08631c5 | 2008-11-23 21:45:46 +0000 | [diff] [blame] | 1717 | Diag(New->getLocation(), diag::err_redefinition) << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 1718 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1719 | return New->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1720 | } |
Douglas Gregor | 275a369 | 2009-03-10 23:43:53 +0000 | [diff] [blame] | 1721 | |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 1722 | if (New->isThreadSpecified() && !Old->isThreadSpecified()) { |
| 1723 | Diag(New->getLocation(), diag::err_thread_non_thread) << New->getDeclName(); |
| 1724 | Diag(Old->getLocation(), diag::note_previous_definition); |
| 1725 | } else if (!New->isThreadSpecified() && Old->isThreadSpecified()) { |
| 1726 | Diag(New->getLocation(), diag::err_non_thread_thread) << New->getDeclName(); |
| 1727 | Diag(Old->getLocation(), diag::note_previous_definition); |
| 1728 | } |
| 1729 | |
Sebastian Redl | 4cae1b3 | 2010-02-02 18:35:11 +0000 | [diff] [blame] | 1730 | // C++ doesn't have tentative definitions, so go right ahead and check here. |
| 1731 | const VarDecl *Def; |
Sebastian Redl | 6c048a9 | 2010-02-03 02:08:48 +0000 | [diff] [blame] | 1732 | if (getLangOptions().CPlusPlus && |
| 1733 | New->isThisDeclarationADefinition() == VarDecl::Definition && |
Sebastian Redl | 4cae1b3 | 2010-02-02 18:35:11 +0000 | [diff] [blame] | 1734 | (Def = Old->getDefinition())) { |
| 1735 | Diag(New->getLocation(), diag::err_redefinition) |
| 1736 | << New->getDeclName(); |
| 1737 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 1738 | New->setInvalidDecl(); |
| 1739 | return; |
| 1740 | } |
Fariborz Jahanian | fba9e8f | 2010-06-25 00:05:45 +0000 | [diff] [blame] | 1741 | // c99 6.2.2 P4. |
| 1742 | // For an identifier declared with the storage-class specifier extern in a |
| 1743 | // scope in which a prior declaration of that identifier is visible, if |
| 1744 | // the prior declaration specifies internal or external linkage, the linkage |
| 1745 | // of the identifier at the later declaration is the same as the linkage |
| 1746 | // specified at the prior declaration. |
| 1747 | // FIXME. revisit this code. |
Fariborz Jahanian | 2bf6d7b | 2010-06-21 16:08:37 +0000 | [diff] [blame] | 1748 | if (New->hasExternalStorage() && |
Fariborz Jahanian | 7d99e98 | 2010-06-24 18:50:41 +0000 | [diff] [blame] | 1749 | Old->getLinkage() == InternalLinkage && |
| 1750 | New->getDeclContext() == Old->getDeclContext()) |
Fariborz Jahanian | 2bf6d7b | 2010-06-21 16:08:37 +0000 | [diff] [blame] | 1751 | New->setStorageClass(Old->getStorageClass()); |
| 1752 | |
Douglas Gregor | 275a369 | 2009-03-10 23:43:53 +0000 | [diff] [blame] | 1753 | // Keep a chain of previous declarations. |
| 1754 | New->setPreviousDeclaration(Old); |
John McCall | 46460a6 | 2010-01-20 21:53:11 +0000 | [diff] [blame] | 1755 | |
| 1756 | // Inherit access appropriately. |
| 1757 | New->setAccess(Old->getAccess()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1758 | } |
| 1759 | |
| 1760 | /// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with |
| 1761 | /// no declarator (e.g. "struct foo;") is parsed. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 1762 | Decl *Sema::ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, |
| 1763 | DeclSpec &DS) { |
Eli Friedman | d296836 | 2009-04-09 21:26:42 +0000 | [diff] [blame] | 1764 | // FIXME: Error on inline/virtual/explicit |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 1765 | // FIXME: Warn on useless __thread |
Eli Friedman | d296836 | 2009-04-09 21:26:42 +0000 | [diff] [blame] | 1766 | // FIXME: Warn on useless const/volatile |
| 1767 | // FIXME: Warn on useless static/extern/typedef/private_extern/mutable |
| 1768 | // FIXME: Warn on useless attributes |
John McCall | e3af023 | 2009-10-07 23:34:25 +0000 | [diff] [blame] | 1769 | Decl *TagD = 0; |
Douglas Gregor | 1a51b4a | 2009-02-09 15:09:02 +0000 | [diff] [blame] | 1770 | TagDecl *Tag = 0; |
| 1771 | if (DS.getTypeSpecType() == DeclSpec::TST_class || |
| 1772 | DS.getTypeSpecType() == DeclSpec::TST_struct || |
| 1773 | DS.getTypeSpecType() == DeclSpec::TST_union || |
Douglas Gregor | 4d9a16f | 2009-05-12 23:25:50 +0000 | [diff] [blame] | 1774 | DS.getTypeSpecType() == DeclSpec::TST_enum) { |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 1775 | TagD = DS.getRepAsDecl(); |
John McCall | e3af023 | 2009-10-07 23:34:25 +0000 | [diff] [blame] | 1776 | |
| 1777 | if (!TagD) // We probably had an error |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 1778 | return 0; |
Douglas Gregor | 4d9a16f | 2009-05-12 23:25:50 +0000 | [diff] [blame] | 1779 | |
John McCall | 67d1a67 | 2009-08-06 02:15:43 +0000 | [diff] [blame] | 1780 | // Note that the above type specs guarantee that the |
| 1781 | // type rep is a Decl, whereas in many of the others |
| 1782 | // it's a Type. |
John McCall | e3af023 | 2009-10-07 23:34:25 +0000 | [diff] [blame] | 1783 | Tag = dyn_cast<TagDecl>(TagD); |
Douglas Gregor | 4d9a16f | 2009-05-12 23:25:50 +0000 | [diff] [blame] | 1784 | } |
Douglas Gregor | 1a51b4a | 2009-02-09 15:09:02 +0000 | [diff] [blame] | 1785 | |
Nuno Lopes | 0a8bab0 | 2009-12-17 11:35:26 +0000 | [diff] [blame] | 1786 | if (unsigned TypeQuals = DS.getTypeQualifiers()) { |
| 1787 | // Enforce C99 6.7.3p2: "Types other than pointer types derived from object |
| 1788 | // or incomplete types shall not be restrict-qualified." |
| 1789 | if (TypeQuals & DeclSpec::TQ_restrict) |
| 1790 | Diag(DS.getRestrictSpecLoc(), |
| 1791 | diag::err_typecheck_invalid_restrict_not_pointer_noarg) |
| 1792 | << DS.getSourceRange(); |
| 1793 | } |
| 1794 | |
Douglas Gregor | d85bea2 | 2009-09-26 06:47:28 +0000 | [diff] [blame] | 1795 | if (DS.isFriendSpecified()) { |
John McCall | 9a34edb | 2010-10-19 01:40:49 +0000 | [diff] [blame] | 1796 | // If we're dealing with a decl but not a TagDecl, assume that |
| 1797 | // whatever routines created it handled the friendship aspect. |
| 1798 | if (TagD && !Tag) |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 1799 | return 0; |
John McCall | e3af023 | 2009-10-07 23:34:25 +0000 | [diff] [blame] | 1800 | return ActOnFriendTypeDecl(S, DS, MultiTemplateParamsArg(*this, 0, 0)); |
Douglas Gregor | d85bea2 | 2009-09-26 06:47:28 +0000 | [diff] [blame] | 1801 | } |
| 1802 | |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 1803 | if (RecordDecl *Record = dyn_cast_or_null<RecordDecl>(Tag)) { |
John McCall | 7f040a9 | 2010-12-24 02:08:15 +0000 | [diff] [blame] | 1804 | ProcessDeclAttributeList(S, Record, DS.getAttributes().getList()); |
Chris Lattner | d451f83 | 2009-10-25 22:21:57 +0000 | [diff] [blame] | 1805 | |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 1806 | if (!Record->getDeclName() && Record->isDefinition() && |
Douglas Gregor | a71c129 | 2009-03-06 23:06:59 +0000 | [diff] [blame] | 1807 | DS.getStorageClassSpec() != DeclSpec::SCS_typedef) { |
| 1808 | if (getLangOptions().CPlusPlus || |
| 1809 | Record->getDeclContext()->isRecord()) |
John McCall | aec0371 | 2010-05-21 20:45:30 +0000 | [diff] [blame] | 1810 | return BuildAnonymousStructOrUnion(S, DS, AS, Record); |
Douglas Gregor | a71c129 | 2009-03-06 23:06:59 +0000 | [diff] [blame] | 1811 | |
Douglas Gregor | cb821d0 | 2010-04-08 21:33:23 +0000 | [diff] [blame] | 1812 | Diag(DS.getSourceRange().getBegin(), diag::ext_no_declarators) |
Douglas Gregor | a71c129 | 2009-03-06 23:06:59 +0000 | [diff] [blame] | 1813 | << DS.getSourceRange(); |
| 1814 | } |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 1815 | } |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 1816 | |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 1817 | // Check for Microsoft C extension: anonymous struct. |
| 1818 | if (getLangOptions().Microsoft && !getLangOptions().CPlusPlus && |
| 1819 | CurContext->isRecord() && |
| 1820 | DS.getStorageClassSpec() == DeclSpec::SCS_unspecified) { |
| 1821 | // Handle 2 kinds of anonymous struct: |
| 1822 | // struct STRUCT; |
| 1823 | // and |
| 1824 | // STRUCT_TYPE; <- where STRUCT_TYPE is a typedef struct. |
| 1825 | RecordDecl *Record = dyn_cast_or_null<RecordDecl>(Tag); |
| 1826 | if ((Record && Record->getDeclName() && !Record->isDefinition()) || |
| 1827 | (DS.getTypeSpecType() == DeclSpec::TST_typename && |
| 1828 | DS.getRepAsType().get()->isStructureType())) { |
| 1829 | Diag(DS.getSourceRange().getBegin(), diag::ext_ms_anonymous_struct) |
| 1830 | << DS.getSourceRange(); |
| 1831 | return BuildMicrosoftCAnonymousStruct(S, DS, Record); |
| 1832 | } |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 1833 | } |
Douglas Gregor | d85bea2 | 2009-09-26 06:47:28 +0000 | [diff] [blame] | 1834 | |
Douglas Gregor | a131d0f | 2010-07-13 06:24:26 +0000 | [diff] [blame] | 1835 | if (getLangOptions().CPlusPlus && |
| 1836 | DS.getStorageClassSpec() != DeclSpec::SCS_typedef) |
| 1837 | if (EnumDecl *Enum = dyn_cast_or_null<EnumDecl>(Tag)) |
| 1838 | if (Enum->enumerator_begin() == Enum->enumerator_end() && |
| 1839 | !Enum->getIdentifier() && !Enum->isInvalidDecl()) |
| 1840 | Diag(Enum->getLocation(), diag::ext_no_declarators) |
| 1841 | << DS.getSourceRange(); |
| 1842 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1843 | if (!DS.isMissingDeclaratorOk() && |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 1844 | DS.getTypeSpecType() != DeclSpec::TST_error) { |
Douglas Gregor | 21282df | 2009-01-22 16:23:54 +0000 | [diff] [blame] | 1845 | // Warn about typedefs of enums without names, since this is an |
Douglas Gregor | a0ebd60 | 2010-07-16 15:40:40 +0000 | [diff] [blame] | 1846 | // extension in both Microsoft and GNU. |
Douglas Gregor | 8158f69 | 2009-01-17 02:55:50 +0000 | [diff] [blame] | 1847 | if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef && |
| 1848 | Tag && isa<EnumDecl>(Tag)) { |
Douglas Gregor | a0ebd60 | 2010-07-16 15:40:40 +0000 | [diff] [blame] | 1849 | Diag(DS.getSourceRange().getBegin(), diag::ext_typedef_without_a_name) |
| 1850 | << DS.getSourceRange(); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 1851 | return Tag; |
Douglas Gregor | ee159c1 | 2009-01-13 23:10:51 +0000 | [diff] [blame] | 1852 | } |
| 1853 | |
Douglas Gregor | cb821d0 | 2010-04-08 21:33:23 +0000 | [diff] [blame] | 1854 | Diag(DS.getSourceRange().getBegin(), diag::ext_no_declarators) |
Sebastian Redl | a4ed0d8 | 2008-12-28 15:28:59 +0000 | [diff] [blame] | 1855 | << DS.getSourceRange(); |
Sebastian Redl | a4ed0d8 | 2008-12-28 15:28:59 +0000 | [diff] [blame] | 1856 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1857 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 1858 | return TagD; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1859 | } |
| 1860 | |
Fariborz Jahanian | c5be7b0 | 2010-09-28 20:42:35 +0000 | [diff] [blame] | 1861 | /// ActOnVlaStmt - This rouine if finds a vla expression in a decl spec. |
| 1862 | /// builds a statement for it and returns it so it is evaluated. |
| 1863 | StmtResult Sema::ActOnVlaStmt(const DeclSpec &DS) { |
| 1864 | StmtResult R; |
| 1865 | if (DS.getTypeSpecType() == DeclSpec::TST_typeofExpr) { |
| 1866 | Expr *Exp = DS.getRepAsExpr(); |
| 1867 | QualType Ty = Exp->getType(); |
| 1868 | if (Ty->isPointerType()) { |
| 1869 | do |
| 1870 | Ty = Ty->getAs<PointerType>()->getPointeeType(); |
| 1871 | while (Ty->isPointerType()); |
| 1872 | } |
| 1873 | if (Ty->isVariableArrayType()) { |
| 1874 | R = ActOnExprStmt(MakeFullExpr(Exp)); |
| 1875 | } |
| 1876 | } |
| 1877 | return R; |
| 1878 | } |
| 1879 | |
John McCall | 1d7c528 | 2009-12-18 10:40:03 +0000 | [diff] [blame] | 1880 | /// We are trying to inject an anonymous member into the given scope; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1881 | /// check if there's an existing declaration that can't be overloaded. |
| 1882 | /// |
| 1883 | /// \return true if this is a forbidden redeclaration |
John McCall | 1d7c528 | 2009-12-18 10:40:03 +0000 | [diff] [blame] | 1884 | static bool CheckAnonMemberRedeclaration(Sema &SemaRef, |
| 1885 | Scope *S, |
Fariborz Jahanian | 588a4ad | 2010-01-22 18:30:17 +0000 | [diff] [blame] | 1886 | DeclContext *Owner, |
John McCall | 1d7c528 | 2009-12-18 10:40:03 +0000 | [diff] [blame] | 1887 | DeclarationName Name, |
| 1888 | SourceLocation NameLoc, |
| 1889 | unsigned diagnostic) { |
| 1890 | LookupResult R(SemaRef, Name, NameLoc, Sema::LookupMemberName, |
| 1891 | Sema::ForRedeclaration); |
| 1892 | if (!SemaRef.LookupName(R, S)) return false; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1893 | |
John McCall | 1d7c528 | 2009-12-18 10:40:03 +0000 | [diff] [blame] | 1894 | if (R.getAsSingle<TagDecl>()) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1895 | return false; |
| 1896 | |
| 1897 | // Pick a representative declaration. |
John McCall | 1d7c528 | 2009-12-18 10:40:03 +0000 | [diff] [blame] | 1898 | NamedDecl *PrevDecl = R.getRepresentativeDecl()->getUnderlyingDecl(); |
Argyrios Kyrtzidis | 2b64239 | 2010-09-23 14:26:01 +0000 | [diff] [blame] | 1899 | assert(PrevDecl && "Expected a non-null Decl"); |
| 1900 | |
| 1901 | if (!SemaRef.isDeclInScope(PrevDecl, Owner, S)) |
| 1902 | return false; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1903 | |
John McCall | 1d7c528 | 2009-12-18 10:40:03 +0000 | [diff] [blame] | 1904 | SemaRef.Diag(NameLoc, diagnostic) << Name; |
| 1905 | SemaRef.Diag(PrevDecl->getLocation(), diag::note_previous_declaration); |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1906 | |
| 1907 | return true; |
| 1908 | } |
| 1909 | |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1910 | /// InjectAnonymousStructOrUnionMembers - Inject the members of the |
| 1911 | /// anonymous struct or union AnonRecord into the owning context Owner |
| 1912 | /// and scope S. This routine will be invoked just after we realize |
| 1913 | /// that an unnamed union or struct is actually an anonymous union or |
| 1914 | /// struct, e.g., |
| 1915 | /// |
| 1916 | /// @code |
| 1917 | /// union { |
| 1918 | /// int i; |
| 1919 | /// float f; |
| 1920 | /// }; // InjectAnonymousStructOrUnionMembers called here to inject i and |
| 1921 | /// // f into the surrounding scope.x |
| 1922 | /// @endcode |
| 1923 | /// |
| 1924 | /// This routine is recursive, injecting the names of nested anonymous |
| 1925 | /// structs/unions into the owning context and scope as well. |
John McCall | aec0371 | 2010-05-21 20:45:30 +0000 | [diff] [blame] | 1926 | static bool InjectAnonymousStructOrUnionMembers(Sema &SemaRef, Scope *S, |
| 1927 | DeclContext *Owner, |
| 1928 | RecordDecl *AnonRecord, |
Francois Pichet | 87c2e12 | 2010-11-21 06:08:52 +0000 | [diff] [blame] | 1929 | AccessSpecifier AS, |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 1930 | llvm::SmallVector<NamedDecl*, 2> &Chaining, |
| 1931 | bool MSAnonStruct) { |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1932 | unsigned diagKind |
| 1933 | = AnonRecord->isUnion() ? diag::err_anonymous_union_member_redecl |
| 1934 | : diag::err_anonymous_struct_member_redecl; |
| 1935 | |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1936 | bool Invalid = false; |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 1937 | |
| 1938 | // Look every FieldDecl and IndirectFieldDecl with a name. |
| 1939 | for (RecordDecl::decl_iterator D = AnonRecord->decls_begin(), |
| 1940 | DEnd = AnonRecord->decls_end(); |
| 1941 | D != DEnd; ++D) { |
| 1942 | if ((isa<FieldDecl>(*D) || isa<IndirectFieldDecl>(*D)) && |
| 1943 | cast<NamedDecl>(*D)->getDeclName()) { |
| 1944 | ValueDecl *VD = cast<ValueDecl>(*D); |
| 1945 | if (CheckAnonMemberRedeclaration(SemaRef, S, Owner, VD->getDeclName(), |
| 1946 | VD->getLocation(), diagKind)) { |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1947 | // C++ [class.union]p2: |
| 1948 | // The names of the members of an anonymous union shall be |
| 1949 | // distinct from the names of any other entity in the |
| 1950 | // scope in which the anonymous union is declared. |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1951 | Invalid = true; |
| 1952 | } else { |
| 1953 | // C++ [class.union]p2: |
| 1954 | // For the purpose of name lookup, after the anonymous union |
| 1955 | // definition, the members of the anonymous union are |
| 1956 | // considered to have been defined in the scope in which the |
| 1957 | // anonymous union is declared. |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 1958 | unsigned OldChainingSize = Chaining.size(); |
| 1959 | if (IndirectFieldDecl *IF = dyn_cast<IndirectFieldDecl>(VD)) |
| 1960 | for (IndirectFieldDecl::chain_iterator PI = IF->chain_begin(), |
| 1961 | PE = IF->chain_end(); PI != PE; ++PI) |
| 1962 | Chaining.push_back(*PI); |
| 1963 | else |
| 1964 | Chaining.push_back(VD); |
| 1965 | |
Francois Pichet | 87c2e12 | 2010-11-21 06:08:52 +0000 | [diff] [blame] | 1966 | assert(Chaining.size() >= 2); |
| 1967 | NamedDecl **NamedChain = |
| 1968 | new (SemaRef.Context)NamedDecl*[Chaining.size()]; |
| 1969 | for (unsigned i = 0; i < Chaining.size(); i++) |
| 1970 | NamedChain[i] = Chaining[i]; |
| 1971 | |
| 1972 | IndirectFieldDecl* IndirectField = |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 1973 | IndirectFieldDecl::Create(SemaRef.Context, Owner, VD->getLocation(), |
| 1974 | VD->getIdentifier(), VD->getType(), |
Francois Pichet | 87c2e12 | 2010-11-21 06:08:52 +0000 | [diff] [blame] | 1975 | NamedChain, Chaining.size()); |
| 1976 | |
| 1977 | IndirectField->setAccess(AS); |
| 1978 | IndirectField->setImplicit(); |
| 1979 | SemaRef.PushOnScopeChains(IndirectField, S); |
John McCall | aec0371 | 2010-05-21 20:45:30 +0000 | [diff] [blame] | 1980 | |
| 1981 | // That includes picking up the appropriate access specifier. |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 1982 | if (AS != AS_none) IndirectField->setAccess(AS); |
Francois Pichet | 87c2e12 | 2010-11-21 06:08:52 +0000 | [diff] [blame] | 1983 | |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 1984 | Chaining.resize(OldChainingSize); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1985 | } |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1986 | } |
| 1987 | } |
| 1988 | |
| 1989 | return Invalid; |
| 1990 | } |
| 1991 | |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 1992 | /// StorageClassSpecToVarDeclStorageClass - Maps a DeclSpec::SCS to |
| 1993 | /// a VarDecl::StorageClass. Any error reporting is up to the caller: |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 1994 | /// illegal input values are mapped to SC_None. |
| 1995 | static StorageClass |
Abramo Bagnara | 35f9a19 | 2010-07-30 16:47:02 +0000 | [diff] [blame] | 1996 | StorageClassSpecToVarDeclStorageClass(DeclSpec::SCS StorageClassSpec) { |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 1997 | switch (StorageClassSpec) { |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 1998 | case DeclSpec::SCS_unspecified: return SC_None; |
| 1999 | case DeclSpec::SCS_extern: return SC_Extern; |
| 2000 | case DeclSpec::SCS_static: return SC_Static; |
| 2001 | case DeclSpec::SCS_auto: return SC_Auto; |
| 2002 | case DeclSpec::SCS_register: return SC_Register; |
| 2003 | case DeclSpec::SCS_private_extern: return SC_PrivateExtern; |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 2004 | // Illegal SCSs map to None: error reporting is up to the caller. |
| 2005 | case DeclSpec::SCS_mutable: // Fall through. |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 2006 | case DeclSpec::SCS_typedef: return SC_None; |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 2007 | } |
| 2008 | llvm_unreachable("unknown storage class specifier"); |
| 2009 | } |
| 2010 | |
| 2011 | /// StorageClassSpecToFunctionDeclStorageClass - Maps a DeclSpec::SCS to |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 2012 | /// a StorageClass. Any error reporting is up to the caller: |
| 2013 | /// illegal input values are mapped to SC_None. |
| 2014 | static StorageClass |
Abramo Bagnara | 35f9a19 | 2010-07-30 16:47:02 +0000 | [diff] [blame] | 2015 | StorageClassSpecToFunctionDeclStorageClass(DeclSpec::SCS StorageClassSpec) { |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 2016 | switch (StorageClassSpec) { |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 2017 | case DeclSpec::SCS_unspecified: return SC_None; |
| 2018 | case DeclSpec::SCS_extern: return SC_Extern; |
| 2019 | case DeclSpec::SCS_static: return SC_Static; |
| 2020 | case DeclSpec::SCS_private_extern: return SC_PrivateExtern; |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 2021 | // Illegal SCSs map to None: error reporting is up to the caller. |
| 2022 | case DeclSpec::SCS_auto: // Fall through. |
| 2023 | case DeclSpec::SCS_mutable: // Fall through. |
| 2024 | case DeclSpec::SCS_register: // Fall through. |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 2025 | case DeclSpec::SCS_typedef: return SC_None; |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 2026 | } |
| 2027 | llvm_unreachable("unknown storage class specifier"); |
| 2028 | } |
| 2029 | |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 2030 | /// BuildAnonymousStructOrUnion - Handle the declaration of an |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2031 | /// anonymous structure or union. Anonymous unions are a C++ feature |
| 2032 | /// (C++ [class.union]) and a GNU C extension; anonymous structures |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2033 | /// are a GNU C and GNU C++ extension. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2034 | Decl *Sema::BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, |
| 2035 | AccessSpecifier AS, |
| 2036 | RecordDecl *Record) { |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2037 | DeclContext *Owner = Record->getDeclContext(); |
| 2038 | |
| 2039 | // Diagnose whether this anonymous struct/union is an extension. |
| 2040 | if (Record->isUnion() && !getLangOptions().CPlusPlus) |
| 2041 | Diag(Record->getLocation(), diag::ext_anonymous_union); |
| 2042 | else if (!Record->isUnion()) |
| 2043 | Diag(Record->getLocation(), diag::ext_anonymous_struct); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2044 | |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2045 | // C and C++ require different kinds of checks for anonymous |
| 2046 | // structs/unions. |
| 2047 | bool Invalid = false; |
| 2048 | if (getLangOptions().CPlusPlus) { |
| 2049 | const char* PrevSpec = 0; |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 2050 | unsigned DiagID; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2051 | // C++ [class.union]p3: |
| 2052 | // Anonymous unions declared in a named namespace or in the |
| 2053 | // global namespace shall be declared static. |
| 2054 | if (DS.getStorageClassSpec() != DeclSpec::SCS_static && |
| 2055 | (isa<TranslationUnitDecl>(Owner) || |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2056 | (isa<NamespaceDecl>(Owner) && |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2057 | cast<NamespaceDecl>(Owner)->getDeclName()))) { |
| 2058 | Diag(Record->getLocation(), diag::err_anonymous_union_not_static); |
| 2059 | Invalid = true; |
| 2060 | |
| 2061 | // Recover by adding 'static'. |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 2062 | DS.SetStorageClassSpec(DeclSpec::SCS_static, SourceLocation(), |
Peter Collingbourne | e2f82f7 | 2011-02-11 19:59:54 +0000 | [diff] [blame] | 2063 | PrevSpec, DiagID, getLangOptions()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2064 | } |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2065 | // C++ [class.union]p3: |
| 2066 | // A storage class is not allowed in a declaration of an |
| 2067 | // anonymous union in a class scope. |
| 2068 | else if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified && |
| 2069 | isa<RecordDecl>(Owner)) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2070 | Diag(DS.getStorageClassSpecLoc(), |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2071 | diag::err_anonymous_union_with_storage_spec); |
| 2072 | Invalid = true; |
| 2073 | |
| 2074 | // Recover by removing the storage specifier. |
| 2075 | DS.SetStorageClassSpec(DeclSpec::SCS_unspecified, SourceLocation(), |
Peter Collingbourne | e2f82f7 | 2011-02-11 19:59:54 +0000 | [diff] [blame] | 2076 | PrevSpec, DiagID, getLangOptions()); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2077 | } |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2078 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2079 | // C++ [class.union]p2: |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2080 | // The member-specification of an anonymous union shall only |
| 2081 | // define non-static data members. [Note: nested types and |
| 2082 | // functions cannot be declared within an anonymous union. ] |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 2083 | for (DeclContext::decl_iterator Mem = Record->decls_begin(), |
| 2084 | MemEnd = Record->decls_end(); |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2085 | Mem != MemEnd; ++Mem) { |
| 2086 | if (FieldDecl *FD = dyn_cast<FieldDecl>(*Mem)) { |
| 2087 | // C++ [class.union]p3: |
| 2088 | // An anonymous union shall not have private or protected |
| 2089 | // members (clause 11). |
John McCall | aec0371 | 2010-05-21 20:45:30 +0000 | [diff] [blame] | 2090 | assert(FD->getAccess() != AS_none); |
| 2091 | if (FD->getAccess() != AS_public) { |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2092 | Diag(FD->getLocation(), diag::err_anonymous_record_nonpublic_member) |
| 2093 | << (int)Record->isUnion() << (int)(FD->getAccess() == AS_protected); |
| 2094 | Invalid = true; |
| 2095 | } |
Argyrios Kyrtzidis | dd7744d | 2010-08-16 17:27:08 +0000 | [diff] [blame] | 2096 | |
| 2097 | if (CheckNontrivialField(FD)) |
| 2098 | Invalid = true; |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2099 | } else if ((*Mem)->isImplicit()) { |
| 2100 | // Any implicit members are fine. |
Douglas Gregor | 1931b44 | 2009-02-03 00:34:39 +0000 | [diff] [blame] | 2101 | } else if (isa<TagDecl>(*Mem) && (*Mem)->getDeclContext() != Record) { |
| 2102 | // This is a type that showed up in an |
| 2103 | // elaborated-type-specifier inside the anonymous struct or |
| 2104 | // union, but which actually declares a type outside of the |
| 2105 | // anonymous struct or union. It's okay. |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2106 | } else if (RecordDecl *MemRecord = dyn_cast<RecordDecl>(*Mem)) { |
| 2107 | if (!MemRecord->isAnonymousStructOrUnion() && |
| 2108 | MemRecord->getDeclName()) { |
Francois Pichet | 538e0d0 | 2010-09-08 11:32:25 +0000 | [diff] [blame] | 2109 | // Visual C++ allows type definition in anonymous struct or union. |
| 2110 | if (getLangOptions().Microsoft) |
| 2111 | Diag(MemRecord->getLocation(), diag::ext_anonymous_record_with_type) |
| 2112 | << (int)Record->isUnion(); |
| 2113 | else { |
| 2114 | // This is a nested type declaration. |
| 2115 | Diag(MemRecord->getLocation(), diag::err_anonymous_record_with_type) |
| 2116 | << (int)Record->isUnion(); |
| 2117 | Invalid = true; |
| 2118 | } |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2119 | } |
Abramo Bagnara | 6206d53 | 2010-06-05 05:09:32 +0000 | [diff] [blame] | 2120 | } else if (isa<AccessSpecDecl>(*Mem)) { |
| 2121 | // Any access specifier is fine. |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2122 | } else { |
| 2123 | // We have something that isn't a non-static data |
| 2124 | // member. Complain about it. |
| 2125 | unsigned DK = diag::err_anonymous_record_bad_member; |
| 2126 | if (isa<TypeDecl>(*Mem)) |
| 2127 | DK = diag::err_anonymous_record_with_type; |
| 2128 | else if (isa<FunctionDecl>(*Mem)) |
| 2129 | DK = diag::err_anonymous_record_with_function; |
| 2130 | else if (isa<VarDecl>(*Mem)) |
| 2131 | DK = diag::err_anonymous_record_with_static; |
Francois Pichet | 538e0d0 | 2010-09-08 11:32:25 +0000 | [diff] [blame] | 2132 | |
| 2133 | // Visual C++ allows type definition in anonymous struct or union. |
| 2134 | if (getLangOptions().Microsoft && |
| 2135 | DK == diag::err_anonymous_record_with_type) |
| 2136 | Diag((*Mem)->getLocation(), diag::ext_anonymous_record_with_type) |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2137 | << (int)Record->isUnion(); |
Francois Pichet | 538e0d0 | 2010-09-08 11:32:25 +0000 | [diff] [blame] | 2138 | else { |
| 2139 | Diag((*Mem)->getLocation(), DK) |
| 2140 | << (int)Record->isUnion(); |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2141 | Invalid = true; |
Francois Pichet | 538e0d0 | 2010-09-08 11:32:25 +0000 | [diff] [blame] | 2142 | } |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2143 | } |
| 2144 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2145 | } |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2146 | |
| 2147 | if (!Record->isUnion() && !Owner->isRecord()) { |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 2148 | Diag(Record->getLocation(), diag::err_anonymous_struct_not_member) |
| 2149 | << (int)getLangOptions().CPlusPlus; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2150 | Invalid = true; |
| 2151 | } |
| 2152 | |
John McCall | eb692e0 | 2009-10-22 23:31:08 +0000 | [diff] [blame] | 2153 | // Mock up a declarator. |
| 2154 | Declarator Dc(DS, Declarator::TypeNameContext); |
John McCall | bf1a028 | 2010-06-04 23:28:52 +0000 | [diff] [blame] | 2155 | TypeSourceInfo *TInfo = GetTypeForDeclarator(Dc, S); |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2156 | assert(TInfo && "couldn't build declarator info for anonymous struct/union"); |
John McCall | eb692e0 | 2009-10-22 23:31:08 +0000 | [diff] [blame] | 2157 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2158 | // Create a declaration for this anonymous struct/union. |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 2159 | NamedDecl *Anon = 0; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2160 | if (RecordDecl *OwningClass = dyn_cast<RecordDecl>(Owner)) { |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 2161 | Anon = FieldDecl::Create(Context, OwningClass, |
| 2162 | DS.getSourceRange().getBegin(), |
| 2163 | Record->getLocation(), |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2164 | /*IdentifierInfo=*/0, |
Argyrios Kyrtzidis | a5d8200 | 2009-08-21 00:31:54 +0000 | [diff] [blame] | 2165 | Context.getTypeDeclType(Record), |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2166 | TInfo, |
Argyrios Kyrtzidis | a5d8200 | 2009-08-21 00:31:54 +0000 | [diff] [blame] | 2167 | /*BitWidth=*/0, /*Mutable=*/false); |
John McCall | aec0371 | 2010-05-21 20:45:30 +0000 | [diff] [blame] | 2168 | Anon->setAccess(AS); |
Douglas Gregor | 2cf9d65 | 2010-09-28 20:38:10 +0000 | [diff] [blame] | 2169 | if (getLangOptions().CPlusPlus) |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2170 | FieldCollector->Add(cast<FieldDecl>(Anon)); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2171 | } else { |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 2172 | DeclSpec::SCS SCSpec = DS.getStorageClassSpec(); |
| 2173 | assert(SCSpec != DeclSpec::SCS_typedef && |
| 2174 | "Parser allowed 'typedef' as storage class VarDecl."); |
Abramo Bagnara | 35f9a19 | 2010-07-30 16:47:02 +0000 | [diff] [blame] | 2175 | VarDecl::StorageClass SC = StorageClassSpecToVarDeclStorageClass(SCSpec); |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 2176 | if (SCSpec == DeclSpec::SCS_mutable) { |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2177 | // mutable can only appear on non-static class members, so it's always |
| 2178 | // an error here |
| 2179 | Diag(Record->getLocation(), diag::err_mutable_nonmember); |
| 2180 | Invalid = true; |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 2181 | SC = SC_None; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2182 | } |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 2183 | SCSpec = DS.getStorageClassSpecAsWritten(); |
| 2184 | VarDecl::StorageClass SCAsWritten |
Abramo Bagnara | 35f9a19 | 2010-07-30 16:47:02 +0000 | [diff] [blame] | 2185 | = StorageClassSpecToVarDeclStorageClass(SCSpec); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2186 | |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 2187 | Anon = VarDecl::Create(Context, Owner, |
| 2188 | DS.getSourceRange().getBegin(), |
| 2189 | Record->getLocation(), /*IdentifierInfo=*/0, |
Argyrios Kyrtzidis | a5d8200 | 2009-08-21 00:31:54 +0000 | [diff] [blame] | 2190 | Context.getTypeDeclType(Record), |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 2191 | TInfo, SC, SCAsWritten); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2192 | } |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 2193 | Anon->setImplicit(); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2194 | |
| 2195 | // Add the anonymous struct/union object to the current |
| 2196 | // context. We'll be referencing this object when we refer to one of |
| 2197 | // its members. |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 2198 | Owner->addDecl(Anon); |
Douglas Gregor | fe60f84 | 2010-05-03 15:18:25 +0000 | [diff] [blame] | 2199 | |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2200 | // Inject the members of the anonymous struct/union into the owning |
| 2201 | // context and into the identifier resolver chain for name lookup |
| 2202 | // purposes. |
Francois Pichet | 87c2e12 | 2010-11-21 06:08:52 +0000 | [diff] [blame] | 2203 | llvm::SmallVector<NamedDecl*, 2> Chain; |
| 2204 | Chain.push_back(Anon); |
| 2205 | |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 2206 | if (InjectAnonymousStructOrUnionMembers(*this, S, Owner, Record, AS, |
| 2207 | Chain, false)) |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 2208 | Invalid = true; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2209 | |
| 2210 | // Mark this as an anonymous struct/union type. Note that we do not |
| 2211 | // do this until after we have already checked and injected the |
| 2212 | // members of this anonymous struct/union type, because otherwise |
| 2213 | // the members could be injected twice: once by DeclContext when it |
| 2214 | // builds its lookup table, and once by |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2215 | // InjectAnonymousStructOrUnionMembers. |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 2216 | Record->setAnonymousStructOrUnion(true); |
| 2217 | |
| 2218 | if (Invalid) |
| 2219 | Anon->setInvalidDecl(); |
| 2220 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2221 | return Anon; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 2222 | } |
| 2223 | |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 2224 | /// BuildMicrosoftCAnonymousStruct - Handle the declaration of an |
| 2225 | /// Microsoft C anonymous structure. |
| 2226 | /// Ref: http://msdn.microsoft.com/en-us/library/z2cx9y4f.aspx |
| 2227 | /// Example: |
| 2228 | /// |
| 2229 | /// struct A { int a; }; |
| 2230 | /// struct B { struct A; int b; }; |
| 2231 | /// |
| 2232 | /// void foo() { |
| 2233 | /// B var; |
| 2234 | /// var.a = 3; |
| 2235 | /// } |
| 2236 | /// |
| 2237 | Decl *Sema::BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, |
| 2238 | RecordDecl *Record) { |
| 2239 | |
| 2240 | // If there is no Record, get the record via the typedef. |
| 2241 | if (!Record) |
| 2242 | Record = DS.getRepAsType().get()->getAsStructureType()->getDecl(); |
| 2243 | |
| 2244 | // Mock up a declarator. |
| 2245 | Declarator Dc(DS, Declarator::TypeNameContext); |
| 2246 | TypeSourceInfo *TInfo = GetTypeForDeclarator(Dc, S); |
| 2247 | assert(TInfo && "couldn't build declarator info for anonymous struct"); |
| 2248 | |
| 2249 | // Create a declaration for this anonymous struct. |
| 2250 | NamedDecl* Anon = FieldDecl::Create(Context, |
| 2251 | cast<RecordDecl>(CurContext), |
| 2252 | DS.getSourceRange().getBegin(), |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 2253 | DS.getSourceRange().getBegin(), |
Francois Pichet | 8e161ed | 2010-11-23 06:07:27 +0000 | [diff] [blame] | 2254 | /*IdentifierInfo=*/0, |
| 2255 | Context.getTypeDeclType(Record), |
| 2256 | TInfo, |
| 2257 | /*BitWidth=*/0, /*Mutable=*/false); |
| 2258 | Anon->setImplicit(); |
| 2259 | |
| 2260 | // Add the anonymous struct object to the current context. |
| 2261 | CurContext->addDecl(Anon); |
| 2262 | |
| 2263 | // Inject the members of the anonymous struct into the current |
| 2264 | // context and into the identifier resolver chain for name lookup |
| 2265 | // purposes. |
| 2266 | llvm::SmallVector<NamedDecl*, 2> Chain; |
| 2267 | Chain.push_back(Anon); |
| 2268 | |
| 2269 | if (InjectAnonymousStructOrUnionMembers(*this, S, CurContext, |
| 2270 | Record->getDefinition(), |
| 2271 | AS_none, Chain, true)) |
| 2272 | Anon->setInvalidDecl(); |
| 2273 | |
| 2274 | return Anon; |
| 2275 | } |
Steve Naroff | f009063 | 2007-09-02 02:04:30 +0000 | [diff] [blame] | 2276 | |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 2277 | /// GetNameForDeclarator - Determine the full declaration name for the |
| 2278 | /// given Declarator. |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2279 | DeclarationNameInfo Sema::GetNameForDeclarator(Declarator &D) { |
Douglas Gregor | 02a24ee | 2009-11-03 16:56:39 +0000 | [diff] [blame] | 2280 | return GetNameFromUnqualifiedId(D.getName()); |
| 2281 | } |
| 2282 | |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2283 | /// \brief Retrieves the declaration name from a parsed unqualified-id. |
| 2284 | DeclarationNameInfo |
| 2285 | Sema::GetNameFromUnqualifiedId(const UnqualifiedId &Name) { |
| 2286 | DeclarationNameInfo NameInfo; |
| 2287 | NameInfo.setLoc(Name.StartLocation); |
| 2288 | |
Douglas Gregor | 3f9a056 | 2009-11-03 01:35:08 +0000 | [diff] [blame] | 2289 | switch (Name.getKind()) { |
Sean Hunt | 0486d74 | 2009-11-28 04:44:28 +0000 | [diff] [blame] | 2290 | |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2291 | case UnqualifiedId::IK_Identifier: |
| 2292 | NameInfo.setName(Name.Identifier); |
| 2293 | NameInfo.setLoc(Name.StartLocation); |
| 2294 | return NameInfo; |
Sean Hunt | 0486d74 | 2009-11-28 04:44:28 +0000 | [diff] [blame] | 2295 | |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2296 | case UnqualifiedId::IK_OperatorFunctionId: |
| 2297 | NameInfo.setName(Context.DeclarationNames.getCXXOperatorName( |
| 2298 | Name.OperatorFunctionId.Operator)); |
| 2299 | NameInfo.setLoc(Name.StartLocation); |
| 2300 | NameInfo.getInfo().CXXOperatorName.BeginOpNameLoc |
| 2301 | = Name.OperatorFunctionId.SymbolLocations[0]; |
| 2302 | NameInfo.getInfo().CXXOperatorName.EndOpNameLoc |
| 2303 | = Name.EndLocation.getRawEncoding(); |
| 2304 | return NameInfo; |
Douglas Gregor | 0efc2c1 | 2010-01-13 17:31:36 +0000 | [diff] [blame] | 2305 | |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2306 | case UnqualifiedId::IK_LiteralOperatorId: |
| 2307 | NameInfo.setName(Context.DeclarationNames.getCXXLiteralOperatorName( |
| 2308 | Name.Identifier)); |
| 2309 | NameInfo.setLoc(Name.StartLocation); |
| 2310 | NameInfo.setCXXLiteralOperatorNameLoc(Name.EndLocation); |
| 2311 | return NameInfo; |
Douglas Gregor | 0efc2c1 | 2010-01-13 17:31:36 +0000 | [diff] [blame] | 2312 | |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2313 | case UnqualifiedId::IK_ConversionFunctionId: { |
| 2314 | TypeSourceInfo *TInfo; |
| 2315 | QualType Ty = GetTypeFromParser(Name.ConversionFunctionId, &TInfo); |
| 2316 | if (Ty.isNull()) |
| 2317 | return DeclarationNameInfo(); |
| 2318 | NameInfo.setName(Context.DeclarationNames.getCXXConversionFunctionName( |
| 2319 | Context.getCanonicalType(Ty))); |
| 2320 | NameInfo.setLoc(Name.StartLocation); |
| 2321 | NameInfo.setNamedTypeInfo(TInfo); |
| 2322 | return NameInfo; |
Douglas Gregor | db422df | 2009-09-25 21:45:23 +0000 | [diff] [blame] | 2323 | } |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2324 | |
| 2325 | case UnqualifiedId::IK_ConstructorName: { |
| 2326 | TypeSourceInfo *TInfo; |
| 2327 | QualType Ty = GetTypeFromParser(Name.ConstructorName, &TInfo); |
| 2328 | if (Ty.isNull()) |
| 2329 | return DeclarationNameInfo(); |
| 2330 | NameInfo.setName(Context.DeclarationNames.getCXXConstructorName( |
| 2331 | Context.getCanonicalType(Ty))); |
| 2332 | NameInfo.setLoc(Name.StartLocation); |
| 2333 | NameInfo.setNamedTypeInfo(TInfo); |
| 2334 | return NameInfo; |
| 2335 | } |
| 2336 | |
| 2337 | case UnqualifiedId::IK_ConstructorTemplateId: { |
| 2338 | // In well-formed code, we can only have a constructor |
| 2339 | // template-id that refers to the current context, so go there |
| 2340 | // to find the actual type being constructed. |
| 2341 | CXXRecordDecl *CurClass = dyn_cast<CXXRecordDecl>(CurContext); |
| 2342 | if (!CurClass || CurClass->getIdentifier() != Name.TemplateId->Name) |
| 2343 | return DeclarationNameInfo(); |
| 2344 | |
| 2345 | // Determine the type of the class being constructed. |
| 2346 | QualType CurClassType = Context.getTypeDeclType(CurClass); |
| 2347 | |
| 2348 | // FIXME: Check two things: that the template-id names the same type as |
| 2349 | // CurClassType, and that the template-id does not occur when the name |
| 2350 | // was qualified. |
| 2351 | |
| 2352 | NameInfo.setName(Context.DeclarationNames.getCXXConstructorName( |
| 2353 | Context.getCanonicalType(CurClassType))); |
| 2354 | NameInfo.setLoc(Name.StartLocation); |
| 2355 | // FIXME: should we retrieve TypeSourceInfo? |
| 2356 | NameInfo.setNamedTypeInfo(0); |
| 2357 | return NameInfo; |
| 2358 | } |
| 2359 | |
| 2360 | case UnqualifiedId::IK_DestructorName: { |
| 2361 | TypeSourceInfo *TInfo; |
| 2362 | QualType Ty = GetTypeFromParser(Name.DestructorName, &TInfo); |
| 2363 | if (Ty.isNull()) |
| 2364 | return DeclarationNameInfo(); |
| 2365 | NameInfo.setName(Context.DeclarationNames.getCXXDestructorName( |
| 2366 | Context.getCanonicalType(Ty))); |
| 2367 | NameInfo.setLoc(Name.StartLocation); |
| 2368 | NameInfo.setNamedTypeInfo(TInfo); |
| 2369 | return NameInfo; |
| 2370 | } |
| 2371 | |
| 2372 | case UnqualifiedId::IK_TemplateId: { |
John McCall | 2b5289b | 2010-08-23 07:28:44 +0000 | [diff] [blame] | 2373 | TemplateName TName = Name.TemplateId->Template.get(); |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2374 | SourceLocation TNameLoc = Name.TemplateId->TemplateNameLoc; |
| 2375 | return Context.getNameForTemplate(TName, TNameLoc); |
| 2376 | } |
| 2377 | |
| 2378 | } // switch (Name.getKind()) |
| 2379 | |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 2380 | assert(false && "Unknown name kind"); |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2381 | return DeclarationNameInfo(); |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 2382 | } |
| 2383 | |
Douglas Gregor | 4ce205f | 2009-02-06 17:46:57 +0000 | [diff] [blame] | 2384 | /// isNearlyMatchingFunction - Determine whether the C++ functions |
| 2385 | /// Declaration and Definition are "nearly" matching. This heuristic |
| 2386 | /// is used to improve diagnostics in the case where an out-of-line |
| 2387 | /// function definition doesn't match any declaration within |
| 2388 | /// the class or namespace. |
| 2389 | static bool isNearlyMatchingFunction(ASTContext &Context, |
| 2390 | FunctionDecl *Declaration, |
| 2391 | FunctionDecl *Definition) { |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 2392 | if (Declaration->param_size() != Definition->param_size()) |
| 2393 | return false; |
| 2394 | for (unsigned Idx = 0; Idx < Declaration->param_size(); ++Idx) { |
| 2395 | QualType DeclParamTy = Declaration->getParamDecl(Idx)->getType(); |
| 2396 | QualType DefParamTy = Definition->getParamDecl(Idx)->getType(); |
| 2397 | |
Douglas Gregor | a4923eb | 2009-11-16 21:35:15 +0000 | [diff] [blame] | 2398 | if (!Context.hasSameUnqualifiedType(DeclParamTy.getNonReferenceType(), |
| 2399 | DefParamTy.getNonReferenceType())) |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 2400 | return false; |
| 2401 | } |
| 2402 | |
| 2403 | return true; |
| 2404 | } |
| 2405 | |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2406 | /// NeedsRebuildingInCurrentInstantiation - Checks whether the given |
| 2407 | /// declarator needs to be rebuilt in the current instantiation. |
| 2408 | /// Any bits of declarator which appear before the name are valid for |
| 2409 | /// consideration here. That's specifically the type in the decl spec |
| 2410 | /// and the base type in any member-pointer chunks. |
| 2411 | static bool RebuildDeclaratorInCurrentInstantiation(Sema &S, Declarator &D, |
| 2412 | DeclarationName Name) { |
| 2413 | // The types we specifically need to rebuild are: |
| 2414 | // - typenames, typeofs, and decltypes |
| 2415 | // - types which will become injected class names |
| 2416 | // Of course, we also need to rebuild any type referencing such a |
| 2417 | // type. It's safest to just say "dependent", but we call out a |
| 2418 | // few cases here. |
| 2419 | |
| 2420 | DeclSpec &DS = D.getMutableDeclSpec(); |
| 2421 | switch (DS.getTypeSpecType()) { |
| 2422 | case DeclSpec::TST_typename: |
| 2423 | case DeclSpec::TST_typeofType: |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2424 | case DeclSpec::TST_decltype: { |
| 2425 | // Grab the type from the parser. |
| 2426 | TypeSourceInfo *TSI = 0; |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 2427 | QualType T = S.GetTypeFromParser(DS.getRepAsType(), &TSI); |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2428 | if (T.isNull() || !T->isDependentType()) break; |
| 2429 | |
| 2430 | // Make sure there's a type source info. This isn't really much |
| 2431 | // of a waste; most dependent types should have type source info |
| 2432 | // attached already. |
| 2433 | if (!TSI) |
| 2434 | TSI = S.Context.getTrivialTypeSourceInfo(T, DS.getTypeSpecTypeLoc()); |
| 2435 | |
| 2436 | // Rebuild the type in the current instantiation. |
| 2437 | TSI = S.RebuildTypeInCurrentInstantiation(TSI, D.getIdentifierLoc(), Name); |
| 2438 | if (!TSI) return true; |
| 2439 | |
| 2440 | // Store the new type back in the decl spec. |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 2441 | ParsedType LocType = S.CreateParsedType(TSI->getType(), TSI); |
| 2442 | DS.UpdateTypeRep(LocType); |
| 2443 | break; |
| 2444 | } |
| 2445 | |
| 2446 | case DeclSpec::TST_typeofExpr: { |
| 2447 | Expr *E = DS.getRepAsExpr(); |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 2448 | ExprResult Result = S.RebuildExprInCurrentInstantiation(E); |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 2449 | if (Result.isInvalid()) return true; |
| 2450 | DS.UpdateExprRep(Result.get()); |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2451 | break; |
| 2452 | } |
| 2453 | |
| 2454 | default: |
| 2455 | // Nothing to do for these decl specs. |
| 2456 | break; |
| 2457 | } |
| 2458 | |
| 2459 | // It doesn't matter what order we do this in. |
| 2460 | for (unsigned I = 0, E = D.getNumTypeObjects(); I != E; ++I) { |
| 2461 | DeclaratorChunk &Chunk = D.getTypeObject(I); |
| 2462 | |
| 2463 | // The only type information in the declarator which can come |
| 2464 | // before the declaration name is the base type of a member |
| 2465 | // pointer. |
| 2466 | if (Chunk.Kind != DeclaratorChunk::MemberPointer) |
| 2467 | continue; |
| 2468 | |
| 2469 | // Rebuild the scope specifier in-place. |
| 2470 | CXXScopeSpec &SS = Chunk.Mem.Scope(); |
| 2471 | if (S.RebuildNestedNameSpecifierInCurrentInstantiation(SS)) |
| 2472 | return true; |
| 2473 | } |
| 2474 | |
| 2475 | return false; |
| 2476 | } |
| 2477 | |
John McCall | 7cd088e | 2010-08-24 07:21:54 +0000 | [diff] [blame] | 2478 | Decl *Sema::ActOnDeclarator(Scope *S, Declarator &D) { |
| 2479 | return HandleDeclarator(S, D, MultiTemplateParamsArg(*this), false); |
| 2480 | } |
| 2481 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2482 | Decl *Sema::HandleDeclarator(Scope *S, Declarator &D, |
| 2483 | MultiTemplateParamsArg TemplateParamLists, |
| 2484 | bool IsFunctionDefinition) { |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2485 | // TODO: consider using NameInfo for diagnostic. |
| 2486 | DeclarationNameInfo NameInfo = GetNameForDeclarator(D); |
| 2487 | DeclarationName Name = NameInfo.getName(); |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 2488 | |
Chris Lattner | e80a59c | 2007-07-25 00:24:17 +0000 | [diff] [blame] | 2489 | // All of these full declarators require an identifier. If it doesn't have |
| 2490 | // one, the ParsedFreeStandingDeclSpec action should be used. |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 2491 | if (!Name) { |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2492 | if (!D.isInvalidType()) // Reject this if we think it is valid. |
Chris Lattner | 1f6f54b | 2008-11-11 06:13:16 +0000 | [diff] [blame] | 2493 | Diag(D.getDeclSpec().getSourceRange().getBegin(), |
Chris Lattner | fa25bbb | 2008-11-19 05:08:23 +0000 | [diff] [blame] | 2494 | diag::err_declarator_need_ident) |
| 2495 | << D.getDeclSpec().getSourceRange() << D.getSourceRange(); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2496 | return 0; |
Douglas Gregor | 56c0458 | 2010-12-16 00:46:58 +0000 | [diff] [blame] | 2497 | } else if (DiagnoseUnexpandedParameterPack(NameInfo, UPPC_DeclarationType)) |
| 2498 | return 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2499 | |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 2500 | // The scope passed in may not be a decl scope. Zip up the scope tree until |
| 2501 | // we find one that is. |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 2502 | while ((S->getFlags() & Scope::DeclScope) == 0 || |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 2503 | (S->getFlags() & Scope::TemplateParamScope) != 0) |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 2504 | S = S->getParent(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2505 | |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2506 | DeclContext *DC = CurContext; |
| 2507 | if (D.getCXXScopeSpec().isInvalid()) |
| 2508 | D.setInvalidType(); |
| 2509 | else if (D.getCXXScopeSpec().isSet()) { |
Douglas Gregor | 6ccab97 | 2010-12-16 01:14:37 +0000 | [diff] [blame] | 2510 | if (DiagnoseUnexpandedParameterPack(D.getCXXScopeSpec(), |
| 2511 | UPPC_DeclarationQualifier)) |
| 2512 | return 0; |
| 2513 | |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2514 | bool EnteringContext = !D.getDeclSpec().isFriendSpecified(); |
| 2515 | DC = computeDeclContext(D.getCXXScopeSpec(), EnteringContext); |
| 2516 | if (!DC) { |
| 2517 | // If we could not compute the declaration context, it's because the |
| 2518 | // declaration context is dependent but does not refer to a class, |
| 2519 | // class template, or class template partial specialization. Complain |
| 2520 | // and return early, to avoid the coming semantic disaster. |
| 2521 | Diag(D.getIdentifierLoc(), |
| 2522 | diag::err_template_qualified_declarator_no_match) |
| 2523 | << (NestedNameSpecifier*)D.getCXXScopeSpec().getScopeRep() |
| 2524 | << D.getCXXScopeSpec().getRange(); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2525 | return 0; |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2526 | } |
John McCall | 0dd7ceb | 2009-12-19 09:35:56 +0000 | [diff] [blame] | 2527 | |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2528 | bool IsDependentContext = DC->isDependentContext(); |
John McCall | 0dd7ceb | 2009-12-19 09:35:56 +0000 | [diff] [blame] | 2529 | |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2530 | if (!IsDependentContext && |
John McCall | 77bb1aa | 2010-05-01 00:40:08 +0000 | [diff] [blame] | 2531 | RequireCompleteDeclContext(D.getCXXScopeSpec(), DC)) |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2532 | return 0; |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2533 | |
Douglas Gregor | 922fff2 | 2010-10-13 22:19:53 +0000 | [diff] [blame] | 2534 | if (isa<CXXRecordDecl>(DC)) { |
| 2535 | if (!cast<CXXRecordDecl>(DC)->hasDefinition()) { |
| 2536 | Diag(D.getIdentifierLoc(), |
| 2537 | diag::err_member_def_undefined_record) |
| 2538 | << Name << DC << D.getCXXScopeSpec().getRange(); |
| 2539 | D.setInvalidType(); |
| 2540 | } else if (isa<CXXRecordDecl>(CurContext) && |
| 2541 | !D.getDeclSpec().isFriendSpecified()) { |
| 2542 | // The user provided a superfluous scope specifier inside a class |
| 2543 | // definition: |
| 2544 | // |
| 2545 | // class X { |
| 2546 | // void X::f(); |
| 2547 | // }; |
| 2548 | if (CurContext->Equals(DC)) |
| 2549 | Diag(D.getIdentifierLoc(), diag::warn_member_extra_qualification) |
| 2550 | << Name << FixItHint::CreateRemoval(D.getCXXScopeSpec().getRange()); |
| 2551 | else |
| 2552 | Diag(D.getIdentifierLoc(), diag::err_member_qualification) |
| 2553 | << Name << D.getCXXScopeSpec().getRange(); |
| 2554 | |
| 2555 | // Pretend that this qualifier was not here. |
| 2556 | D.getCXXScopeSpec().clear(); |
| 2557 | } |
John McCall | 63b4385 | 2010-04-29 23:50:39 +0000 | [diff] [blame] | 2558 | } |
| 2559 | |
| 2560 | // Check whether we need to rebuild the type of the given |
| 2561 | // declaration in the current instantiation. |
| 2562 | if (EnteringContext && IsDependentContext && |
| 2563 | TemplateParamLists.size() != 0) { |
| 2564 | ContextRAII SavedContext(*this, DC); |
| 2565 | if (RebuildDeclaratorInCurrentInstantiation(*this, D, Name)) |
| 2566 | D.setInvalidType(); |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 2567 | } |
| 2568 | } |
Douglas Gregor | a6e937c | 2010-10-15 13:21:21 +0000 | [diff] [blame] | 2569 | |
| 2570 | // C++ [class.mem]p13: |
| 2571 | // If T is the name of a class, then each of the following shall have a |
| 2572 | // name different from T: |
| 2573 | // - every static data member of class T; |
| 2574 | // - every member function of class T |
| 2575 | // - every member of class T that is itself a type; |
| 2576 | if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(DC)) |
| 2577 | if (Record->getIdentifier() && Record->getDeclName() == Name) { |
| 2578 | Diag(D.getIdentifierLoc(), diag::err_member_name_of_class) |
| 2579 | << Name; |
| 2580 | |
| 2581 | // If this is a typedef, we'll end up spewing multiple diagnostics. |
| 2582 | // Just return early; it's safer. |
| 2583 | if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) |
| 2584 | return 0; |
| 2585 | } |
| 2586 | |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 2587 | NamedDecl *New; |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 2588 | |
John McCall | bf1a028 | 2010-06-04 23:28:52 +0000 | [diff] [blame] | 2589 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); |
| 2590 | QualType R = TInfo->getType(); |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 2591 | |
Douglas Gregor | d093722 | 2010-12-13 22:49:22 +0000 | [diff] [blame] | 2592 | if (DiagnoseUnexpandedParameterPack(D.getIdentifierLoc(), TInfo, |
| 2593 | UPPC_DeclarationType)) |
| 2594 | D.setInvalidType(); |
| 2595 | |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 2596 | LookupResult Previous(*this, NameInfo, LookupOrdinaryName, |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2597 | ForRedeclaration); |
| 2598 | |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 2599 | // 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] | 2600 | if (!D.getCXXScopeSpec().isSet()) { |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2601 | bool IsLinkageLookup = false; |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 2602 | |
| 2603 | // If the declaration we're planning to build will be a function |
| 2604 | // or object with linkage, then look for another declaration with |
| 2605 | // linkage (C99 6.2.2p4-5 and C++ [basic.link]p6). |
| 2606 | if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) |
| 2607 | /* Do nothing*/; |
| 2608 | else if (R->isFunctionType()) { |
Douglas Gregor | 6bec78d | 2009-07-07 17:00:05 +0000 | [diff] [blame] | 2609 | if (CurContext->isFunctionOrMethod() || |
| 2610 | D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_static) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2611 | IsLinkageLookup = true; |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 2612 | } else if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_extern) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2613 | IsLinkageLookup = true; |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 2614 | else if (CurContext->getRedeclContext()->isTranslationUnit() && |
Douglas Gregor | 6bec78d | 2009-07-07 17:00:05 +0000 | [diff] [blame] | 2615 | D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_static) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2616 | IsLinkageLookup = true; |
| 2617 | |
| 2618 | if (IsLinkageLookup) |
| 2619 | Previous.clear(LookupRedeclarationWithLinkage); |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 2620 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2621 | LookupName(Previous, S, /* CreateBuiltins = */ IsLinkageLookup); |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 2622 | } else { // Something like "int foo::x;" |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2623 | LookupQualifiedName(Previous, DC); |
| 2624 | |
| 2625 | // Don't consider using declarations as previous declarations for |
| 2626 | // out-of-line members. |
| 2627 | RemoveUsingDecls(Previous); |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 2628 | |
| 2629 | // C++ 7.3.1.2p2: |
| 2630 | // Members (including explicit specializations of templates) of a named |
| 2631 | // namespace can also be defined outside that namespace by explicit |
| 2632 | // qualification of the name being defined, provided that the entity being |
| 2633 | // defined was already declared in the namespace and the definition appears |
| 2634 | // after the point of declaration in a namespace that encloses the |
| 2635 | // declarations namespace. |
| 2636 | // |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 2637 | // Note that we only check the context at this point. We don't yet |
| 2638 | // have enough information to make sure that PrevDecl is actually |
| 2639 | // the declaration we want to match. For example, given: |
| 2640 | // |
Douglas Gregor | 9d35097 | 2008-12-12 08:25:50 +0000 | [diff] [blame] | 2641 | // class X { |
| 2642 | // void f(); |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 2643 | // void f(float); |
Douglas Gregor | 9d35097 | 2008-12-12 08:25:50 +0000 | [diff] [blame] | 2644 | // }; |
| 2645 | // |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 2646 | // void X::f(int) { } // ill-formed |
| 2647 | // |
| 2648 | // In this case, PrevDecl will point to the overload set |
| 2649 | // containing the two f's declared in X, but neither of them |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2650 | // matches. |
Douglas Gregor | 4ce205f | 2009-02-06 17:46:57 +0000 | [diff] [blame] | 2651 | |
| 2652 | // First check whether we named the global scope. |
| 2653 | if (isa<TranslationUnitDecl>(DC)) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2654 | Diag(D.getIdentifierLoc(), diag::err_invalid_declarator_global_scope) |
Douglas Gregor | 4ce205f | 2009-02-06 17:46:57 +0000 | [diff] [blame] | 2655 | << Name << D.getCXXScopeSpec().getRange(); |
Sebastian Redl | 9770ef0 | 2009-11-08 11:36:54 +0000 | [diff] [blame] | 2656 | } else { |
| 2657 | DeclContext *Cur = CurContext; |
| 2658 | while (isa<LinkageSpecDecl>(Cur)) |
| 2659 | Cur = Cur->getParent(); |
| 2660 | if (!Cur->Encloses(DC)) { |
| 2661 | // The qualifying scope doesn't enclose the original declaration. |
| 2662 | // Emit diagnostic based on current scope. |
| 2663 | SourceLocation L = D.getIdentifierLoc(); |
| 2664 | SourceRange R = D.getCXXScopeSpec().getRange(); |
| 2665 | if (isa<FunctionDecl>(Cur)) |
| 2666 | Diag(L, diag::err_invalid_declarator_in_function) << Name << R; |
| 2667 | else |
| 2668 | Diag(L, diag::err_invalid_declarator_scope) |
| 2669 | << Name << cast<NamedDecl>(DC) << R; |
| 2670 | D.setInvalidType(); |
| 2671 | } |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 2672 | } |
| 2673 | } |
| 2674 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2675 | if (Previous.isSingleResult() && |
| 2676 | Previous.getFoundDecl()->isTemplateParameter()) { |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 2677 | // Maybe we will complain about the shadowed template parameter. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2678 | if (!D.isInvalidType()) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2679 | if (DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), |
| 2680 | Previous.getFoundDecl())) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2681 | D.setInvalidType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2682 | |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 2683 | // Just pretend that we didn't see the previous declaration. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2684 | Previous.clear(); |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 2685 | } |
| 2686 | |
Douglas Gregor | 2ce52f3 | 2008-04-13 21:07:44 +0000 | [diff] [blame] | 2687 | // In C++, the previous declaration we find might be a tag type |
| 2688 | // (class or enum). In this case, the new declaration will hide the |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 2689 | // tag type. Note that this does does not apply if we're declaring a |
| 2690 | // typedef (C++ [dcl.typedef]p4). |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2691 | if (Previous.isSingleTagDecl() && |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 2692 | D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2693 | Previous.clear(); |
Douglas Gregor | 2ce52f3 | 2008-04-13 21:07:44 +0000 | [diff] [blame] | 2694 | |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 2695 | bool Redeclaration = false; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 2696 | if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) { |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 2697 | if (TemplateParamLists.size()) { |
| 2698 | Diag(D.getIdentifierLoc(), diag::err_template_typedef); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2699 | return 0; |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 2700 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2701 | |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2702 | New = ActOnTypedefDeclarator(S, D, DC, R, TInfo, Previous, Redeclaration); |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 2703 | } else if (R->isFunctionType()) { |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2704 | New = ActOnFunctionDeclarator(S, D, DC, R, TInfo, Previous, |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 2705 | move(TemplateParamLists), |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2706 | IsFunctionDefinition, Redeclaration); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 2707 | } else { |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2708 | New = ActOnVariableDeclarator(S, D, DC, R, TInfo, Previous, |
Douglas Gregor | dfe3f2d | 2009-07-22 17:18:37 +0000 | [diff] [blame] | 2709 | move(TemplateParamLists), |
| 2710 | Redeclaration); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 2711 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2712 | |
| 2713 | if (New == 0) |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2714 | return 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2715 | |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 2716 | // If this has an identifier and is not an invalid redeclaration or |
| 2717 | // function template specialization, add it to the scope stack. |
Douglas Gregor | f178dca | 2010-07-24 00:10:38 +0000 | [diff] [blame] | 2718 | if (New->getDeclName() && !(Redeclaration && New->isInvalidDecl())) |
Argyrios Kyrtzidis | 87f3ff0 | 2008-04-12 00:47:19 +0000 | [diff] [blame] | 2719 | PushOnScopeChains(New, S); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2720 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2721 | return New; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 2722 | } |
| 2723 | |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2724 | /// TryToFixInvalidVariablyModifiedType - Helper method to turn variable array |
| 2725 | /// types into constant array types in certain situations which would otherwise |
| 2726 | /// be errors (for GCC compatibility). |
| 2727 | static QualType TryToFixInvalidVariablyModifiedType(QualType T, |
| 2728 | ASTContext &Context, |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 2729 | bool &SizeIsNegative, |
| 2730 | llvm::APSInt &Oversized) { |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2731 | // This method tries to turn a variable array into a constant |
| 2732 | // array even when the size isn't an ICE. This is necessary |
| 2733 | // for compatibility with code that depends on gcc's buggy |
| 2734 | // constant expression folding, like struct {char x[(int)(char*)2];} |
| 2735 | SizeIsNegative = false; |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 2736 | Oversized = 0; |
| 2737 | |
| 2738 | if (T->isDependentType()) |
| 2739 | return QualType(); |
| 2740 | |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 2741 | QualifierCollector Qs; |
| 2742 | const Type *Ty = Qs.strip(T); |
| 2743 | |
| 2744 | if (const PointerType* PTy = dyn_cast<PointerType>(Ty)) { |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2745 | QualType Pointee = PTy->getPointeeType(); |
| 2746 | QualType FixedType = |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 2747 | TryToFixInvalidVariablyModifiedType(Pointee, Context, SizeIsNegative, |
| 2748 | Oversized); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2749 | if (FixedType.isNull()) return FixedType; |
Eli Friedman | 61125c8 | 2009-02-21 00:58:02 +0000 | [diff] [blame] | 2750 | FixedType = Context.getPointerType(FixedType); |
John McCall | 49f4e1c | 2010-12-10 11:01:00 +0000 | [diff] [blame] | 2751 | return Qs.apply(Context, FixedType); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2752 | } |
Abramo Bagnara | 075f8f1 | 2010-12-10 16:29:40 +0000 | [diff] [blame] | 2753 | if (const ParenType* PTy = dyn_cast<ParenType>(Ty)) { |
| 2754 | QualType Inner = PTy->getInnerType(); |
| 2755 | QualType FixedType = |
| 2756 | TryToFixInvalidVariablyModifiedType(Inner, Context, SizeIsNegative, |
| 2757 | Oversized); |
| 2758 | if (FixedType.isNull()) return FixedType; |
| 2759 | FixedType = Context.getParenType(FixedType); |
| 2760 | return Qs.apply(Context, FixedType); |
| 2761 | } |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2762 | |
| 2763 | const VariableArrayType* VLATy = dyn_cast<VariableArrayType>(T); |
Eli Friedman | bc592e6 | 2009-02-26 03:58:54 +0000 | [diff] [blame] | 2764 | if (!VLATy) |
| 2765 | return QualType(); |
| 2766 | // FIXME: We should probably handle this case |
| 2767 | if (VLATy->getElementType()->isVariablyModifiedType()) |
| 2768 | return QualType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2769 | |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2770 | Expr::EvalResult EvalResult; |
| 2771 | if (!VLATy->getSizeExpr() || |
Eli Friedman | bc592e6 | 2009-02-26 03:58:54 +0000 | [diff] [blame] | 2772 | !VLATy->getSizeExpr()->Evaluate(EvalResult, Context) || |
| 2773 | !EvalResult.Val.isInt()) |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2774 | return QualType(); |
Eli Friedman | bc592e6 | 2009-02-26 03:58:54 +0000 | [diff] [blame] | 2775 | |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 2776 | // Check whether the array size is negative. |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2777 | llvm::APSInt &Res = EvalResult.Val.getInt(); |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 2778 | if (Res.isSigned() && Res.isNegative()) { |
| 2779 | SizeIsNegative = true; |
| 2780 | return QualType(); |
Douglas Gregor | 7e7eb3d | 2009-07-06 15:59:29 +0000 | [diff] [blame] | 2781 | } |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2782 | |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 2783 | // Check whether the array is too large to be addressed. |
| 2784 | unsigned ActiveSizeBits |
| 2785 | = ConstantArrayType::getNumAddressingBits(Context, VLATy->getElementType(), |
| 2786 | Res); |
| 2787 | if (ActiveSizeBits > ConstantArrayType::getMaxSizeBits(Context)) { |
| 2788 | Oversized = Res; |
| 2789 | return QualType(); |
| 2790 | } |
| 2791 | |
| 2792 | return Context.getConstantArrayType(VLATy->getElementType(), |
| 2793 | Res, ArrayType::Normal, 0); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2794 | } |
| 2795 | |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 2796 | /// \brief Register the given locally-scoped external C declaration so |
| 2797 | /// that it can be found later for redeclarations |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2798 | void |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2799 | Sema::RegisterLocallyScopedExternCDecl(NamedDecl *ND, |
| 2800 | const LookupResult &Previous, |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 2801 | Scope *S) { |
| 2802 | assert(ND->getLexicalDeclContext()->isFunctionOrMethod() && |
| 2803 | "Decl is not a locally-scoped decl!"); |
| 2804 | // Note that we have a locally-scoped external with this name. |
| 2805 | LocallyScopedExternalDecls[ND->getDeclName()] = ND; |
| 2806 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2807 | if (!Previous.isSingleResult()) |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 2808 | return; |
| 2809 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2810 | NamedDecl *PrevDecl = Previous.getFoundDecl(); |
| 2811 | |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 2812 | // If there was a previous declaration of this variable, it may be |
| 2813 | // in our identifier chain. Update the identifier chain with the new |
| 2814 | // declaration. |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2815 | if (S && IdResolver.ReplaceDecl(PrevDecl, ND)) { |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 2816 | // The previous declaration was found on the identifer resolver |
| 2817 | // chain, so remove it from its scope. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2818 | while (S && !S->isDeclScope(PrevDecl)) |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 2819 | S = S->getParent(); |
| 2820 | |
| 2821 | if (S) |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 2822 | S->RemoveDecl(PrevDecl); |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 2823 | } |
| 2824 | } |
| 2825 | |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 2826 | /// \brief Diagnose function specifiers on a declaration of an identifier that |
| 2827 | /// does not identify a function. |
| 2828 | void Sema::DiagnoseFunctionSpecifiers(Declarator& D) { |
| 2829 | // FIXME: We should probably indicate the identifier in question to avoid |
| 2830 | // confusion for constructs like "inline int a(), b;" |
| 2831 | if (D.getDeclSpec().isInlineSpecified()) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2832 | Diag(D.getDeclSpec().getInlineSpecLoc(), |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 2833 | diag::err_inline_non_function); |
| 2834 | |
| 2835 | if (D.getDeclSpec().isVirtualSpecified()) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2836 | Diag(D.getDeclSpec().getVirtualSpecLoc(), |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 2837 | diag::err_virtual_non_function); |
| 2838 | |
| 2839 | if (D.getDeclSpec().isExplicitSpecified()) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2840 | Diag(D.getDeclSpec().getExplicitSpecLoc(), |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 2841 | diag::err_explicit_non_function); |
| 2842 | } |
| 2843 | |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 2844 | NamedDecl* |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 2845 | Sema::ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2846 | QualType R, TypeSourceInfo *TInfo, |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2847 | LookupResult &Previous, bool &Redeclaration) { |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 2848 | // Typedef declarators cannot be qualified (C++ [dcl.meaning]p1). |
| 2849 | if (D.getCXXScopeSpec().isSet()) { |
| 2850 | Diag(D.getIdentifierLoc(), diag::err_qualified_typedef_declarator) |
| 2851 | << D.getCXXScopeSpec().getRange(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2852 | D.setInvalidType(); |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 2853 | // Pretend we didn't see the scope specifier. |
Douglas Gregor | 9de672f | 2010-03-23 15:26:55 +0000 | [diff] [blame] | 2854 | DC = CurContext; |
| 2855 | Previous.clear(); |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 2856 | } |
| 2857 | |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2858 | if (getLangOptions().CPlusPlus) { |
| 2859 | // Check that there are no default arguments (C++ only). |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 2860 | CheckExtraCXXDefaultArguments(D); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2861 | } |
| 2862 | |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 2863 | DiagnoseFunctionSpecifiers(D); |
| 2864 | |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 2865 | if (D.getDeclSpec().isThreadSpecified()) |
| 2866 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_invalid_thread); |
| 2867 | |
Douglas Gregor | aef0199 | 2010-07-13 06:37:01 +0000 | [diff] [blame] | 2868 | if (D.getName().Kind != UnqualifiedId::IK_Identifier) { |
| 2869 | Diag(D.getName().StartLocation, diag::err_typedef_not_identifier) |
| 2870 | << D.getName().getSourceRange(); |
| 2871 | return 0; |
| 2872 | } |
| 2873 | |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2874 | TypedefDecl *NewTD = ParseTypedefDecl(S, D, R, TInfo); |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 2875 | if (!NewTD) return 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2876 | |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 2877 | // Handle attributes prior to checking for duplicates in MergeVarDecl |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 2878 | ProcessDeclAttributes(S, NewTD, D); |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2879 | |
Chris Lattner | 38c5ebd | 2009-04-19 05:21:20 +0000 | [diff] [blame] | 2880 | // C99 6.7.7p2: If a typedef name specifies a variably modified type |
| 2881 | // then it shall have block scope. |
Eli Friedman | bf87f2c | 2010-08-10 03:13:15 +0000 | [diff] [blame] | 2882 | // Note that variably modified types must be fixed before merging the decl so |
| 2883 | // that redeclarations will match. |
Chris Lattner | 38c5ebd | 2009-04-19 05:21:20 +0000 | [diff] [blame] | 2884 | QualType T = NewTD->getUnderlyingType(); |
| 2885 | if (T->isVariablyModifiedType()) { |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 2886 | getCurFunction()->setHasBranchProtectedScope(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2887 | |
Chris Lattner | 38c5ebd | 2009-04-19 05:21:20 +0000 | [diff] [blame] | 2888 | if (S->getFnParent() == 0) { |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2889 | bool SizeIsNegative; |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 2890 | llvm::APSInt Oversized; |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2891 | QualType FixedTy = |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 2892 | TryToFixInvalidVariablyModifiedType(T, Context, SizeIsNegative, |
| 2893 | Oversized); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2894 | if (!FixedTy.isNull()) { |
| 2895 | Diag(D.getIdentifierLoc(), diag::warn_illegal_constant_array_size); |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2896 | NewTD->setTypeSourceInfo(Context.getTrivialTypeSourceInfo(FixedTy)); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2897 | } else { |
| 2898 | if (SizeIsNegative) |
| 2899 | Diag(D.getIdentifierLoc(), diag::err_typecheck_negative_array_size); |
| 2900 | else if (T->isVariableArrayType()) |
| 2901 | Diag(D.getIdentifierLoc(), diag::err_vla_decl_in_file_scope); |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 2902 | else if (Oversized.getBoolValue()) |
| 2903 | Diag(D.getIdentifierLoc(), diag::err_array_too_large) |
| 2904 | << Oversized.toString(10); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2905 | else |
| 2906 | Diag(D.getIdentifierLoc(), diag::err_vm_decl_in_file_scope); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2907 | NewTD->setInvalidDecl(); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2908 | } |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 2909 | } |
| 2910 | } |
Douglas Gregor | c29f77b | 2009-07-07 16:35:42 +0000 | [diff] [blame] | 2911 | |
Eli Friedman | bf87f2c | 2010-08-10 03:13:15 +0000 | [diff] [blame] | 2912 | // Merge the decl with the existing one if appropriate. If the decl is |
| 2913 | // in an outer scope, it isn't the same thing. |
Douglas Gregor | cc20945 | 2011-03-07 16:54:27 +0000 | [diff] [blame] | 2914 | FilterLookupForScope(*this, Previous, DC, S, /*ConsiderLinkage*/ false, |
| 2915 | /*ExplicitInstantiationOrSpecialization=*/false); |
Eli Friedman | bf87f2c | 2010-08-10 03:13:15 +0000 | [diff] [blame] | 2916 | if (!Previous.empty()) { |
| 2917 | Redeclaration = true; |
| 2918 | MergeTypeDefDecl(NewTD, Previous); |
| 2919 | } |
| 2920 | |
Douglas Gregor | c29f77b | 2009-07-07 16:35:42 +0000 | [diff] [blame] | 2921 | // If this is the C FILE type, notify the AST context. |
| 2922 | if (IdentifierInfo *II = NewTD->getIdentifier()) |
| 2923 | if (!NewTD->isInvalidDecl() && |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 2924 | NewTD->getDeclContext()->getRedeclContext()->isTranslationUnit()) { |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 2925 | if (II->isStr("FILE")) |
| 2926 | Context.setFILEDecl(NewTD); |
| 2927 | else if (II->isStr("jmp_buf")) |
| 2928 | Context.setjmp_bufDecl(NewTD); |
| 2929 | else if (II->isStr("sigjmp_buf")) |
| 2930 | Context.setsigjmp_bufDecl(NewTD); |
Douglas Gregor | 4a1bb8c | 2010-10-05 15:41:24 +0000 | [diff] [blame] | 2931 | else if (II->isStr("__builtin_va_list")) |
| 2932 | Context.setBuiltinVaListType(Context.getTypedefType(NewTD)); |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 2933 | } |
| 2934 | |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 2935 | return NewTD; |
| 2936 | } |
| 2937 | |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 2938 | /// \brief Determines whether the given declaration is an out-of-scope |
| 2939 | /// previous declaration. |
| 2940 | /// |
| 2941 | /// This routine should be invoked when name lookup has found a |
| 2942 | /// previous declaration (PrevDecl) that is not in the scope where a |
| 2943 | /// new declaration by the same name is being introduced. If the new |
| 2944 | /// declaration occurs in a local scope, previous declarations with |
| 2945 | /// linkage may still be considered previous declarations (C99 |
| 2946 | /// 6.2.2p4-5, C++ [basic.link]p6). |
| 2947 | /// |
| 2948 | /// \param PrevDecl the previous declaration found by name |
| 2949 | /// lookup |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2950 | /// |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 2951 | /// \param DC the context in which the new declaration is being |
| 2952 | /// declared. |
| 2953 | /// |
| 2954 | /// \returns true if PrevDecl is an out-of-scope previous declaration |
| 2955 | /// for a new delcaration with the same name. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2956 | static bool |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 2957 | isOutOfScopePreviousDeclaration(NamedDecl *PrevDecl, DeclContext *DC, |
| 2958 | ASTContext &Context) { |
| 2959 | if (!PrevDecl) |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 2960 | return false; |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 2961 | |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 2962 | if (!PrevDecl->hasLinkage()) |
| 2963 | return false; |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 2964 | |
| 2965 | if (Context.getLangOptions().CPlusPlus) { |
| 2966 | // C++ [basic.link]p6: |
| 2967 | // If there is a visible declaration of an entity with linkage |
| 2968 | // having the same name and type, ignoring entities declared |
| 2969 | // outside the innermost enclosing namespace scope, the block |
| 2970 | // scope declaration declares that same entity and receives the |
| 2971 | // linkage of the previous declaration. |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 2972 | DeclContext *OuterContext = DC->getRedeclContext(); |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 2973 | if (!OuterContext->isFunctionOrMethod()) |
| 2974 | // This rule only applies to block-scope declarations. |
| 2975 | return false; |
Douglas Gregor | 757c600 | 2010-08-27 22:55:10 +0000 | [diff] [blame] | 2976 | |
| 2977 | DeclContext *PrevOuterContext = PrevDecl->getDeclContext(); |
| 2978 | if (PrevOuterContext->isRecord()) |
| 2979 | // We found a member function: ignore it. |
| 2980 | return false; |
| 2981 | |
| 2982 | // Find the innermost enclosing namespace for the new and |
| 2983 | // previous declarations. |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 2984 | OuterContext = OuterContext->getEnclosingNamespaceContext(); |
| 2985 | PrevOuterContext = PrevOuterContext->getEnclosingNamespaceContext(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2986 | |
Douglas Gregor | 757c600 | 2010-08-27 22:55:10 +0000 | [diff] [blame] | 2987 | // The previous declaration is in a different namespace, so it |
| 2988 | // isn't the same function. |
| 2989 | if (!OuterContext->Equals(PrevOuterContext)) |
| 2990 | return false; |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 2991 | } |
| 2992 | |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 2993 | return true; |
| 2994 | } |
| 2995 | |
John McCall | b621766 | 2010-03-15 10:12:16 +0000 | [diff] [blame] | 2996 | static void SetNestedNameSpecifier(DeclaratorDecl *DD, Declarator &D) { |
| 2997 | CXXScopeSpec &SS = D.getCXXScopeSpec(); |
| 2998 | if (!SS.isSet()) return; |
Douglas Gregor | c22b5ff | 2011-02-25 02:25:35 +0000 | [diff] [blame] | 2999 | DD->setQualifierInfo(SS.getWithLocInContext(DD->getASTContext())); |
John McCall | b621766 | 2010-03-15 10:12:16 +0000 | [diff] [blame] | 3000 | } |
| 3001 | |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 3002 | NamedDecl* |
Chris Lattner | 16c5dea | 2010-10-10 18:16:20 +0000 | [diff] [blame] | 3003 | Sema::ActOnVariableDeclarator(Scope *S, Declarator &D, DeclContext *DC, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 3004 | QualType R, TypeSourceInfo *TInfo, |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3005 | LookupResult &Previous, |
Douglas Gregor | dfe3f2d | 2009-07-22 17:18:37 +0000 | [diff] [blame] | 3006 | MultiTemplateParamsArg TemplateParamLists, |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 3007 | bool &Redeclaration) { |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 3008 | DeclarationName Name = GetNameForDeclarator(D).getName(); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3009 | |
| 3010 | // Check that there are no default arguments (C++ only). |
| 3011 | if (getLangOptions().CPlusPlus) |
| 3012 | CheckExtraCXXDefaultArguments(D); |
| 3013 | |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 3014 | DeclSpec::SCS SCSpec = D.getDeclSpec().getStorageClassSpec(); |
| 3015 | assert(SCSpec != DeclSpec::SCS_typedef && |
| 3016 | "Parser allowed 'typedef' as storage class VarDecl."); |
Abramo Bagnara | 35f9a19 | 2010-07-30 16:47:02 +0000 | [diff] [blame] | 3017 | VarDecl::StorageClass SC = StorageClassSpecToVarDeclStorageClass(SCSpec); |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 3018 | if (SCSpec == DeclSpec::SCS_mutable) { |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3019 | // mutable can only appear on non-static class members, so it's always |
| 3020 | // an error here |
| 3021 | Diag(D.getIdentifierLoc(), diag::err_mutable_nonmember); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3022 | D.setInvalidType(); |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 3023 | SC = SC_None; |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3024 | } |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 3025 | SCSpec = D.getDeclSpec().getStorageClassSpecAsWritten(); |
| 3026 | VarDecl::StorageClass SCAsWritten |
Abramo Bagnara | 35f9a19 | 2010-07-30 16:47:02 +0000 | [diff] [blame] | 3027 | = StorageClassSpecToVarDeclStorageClass(SCSpec); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3028 | |
| 3029 | IdentifierInfo *II = Name.getAsIdentifierInfo(); |
| 3030 | if (!II) { |
| 3031 | Diag(D.getIdentifierLoc(), diag::err_bad_variable_name) |
| 3032 | << Name.getAsString(); |
| 3033 | return 0; |
| 3034 | } |
| 3035 | |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 3036 | DiagnoseFunctionSpecifiers(D); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 3037 | |
Douglas Gregor | 2d2e9cf | 2009-03-11 20:22:50 +0000 | [diff] [blame] | 3038 | if (!DC->isRecord() && S->getFnParent() == 0) { |
| 3039 | // C99 6.9p2: The storage-class specifiers auto and register shall not |
| 3040 | // appear in the declaration specifiers in an external declaration. |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 3041 | if (SC == SC_Auto || SC == SC_Register) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3042 | |
Chris Lattner | d4b19d5 | 2009-05-12 21:44:00 +0000 | [diff] [blame] | 3043 | // If this is a register variable with an asm label specified, then this |
| 3044 | // is a GNU extension. |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 3045 | if (SC == SC_Register && D.getAsmLabel()) |
Chris Lattner | d4b19d5 | 2009-05-12 21:44:00 +0000 | [diff] [blame] | 3046 | Diag(D.getIdentifierLoc(), diag::err_unsupported_global_register); |
| 3047 | else |
| 3048 | Diag(D.getIdentifierLoc(), diag::err_typecheck_sclass_fscope); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3049 | D.setInvalidType(); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3050 | } |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3051 | } |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3052 | |
Ted Kremenek | 9577abc | 2011-01-23 17:04:59 +0000 | [diff] [blame] | 3053 | bool isExplicitSpecialization = false; |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3054 | VarDecl *NewVD; |
| 3055 | if (!getLangOptions().CPlusPlus) { |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 3056 | NewVD = VarDecl::Create(Context, DC, D.getSourceRange().getBegin(), |
| 3057 | D.getIdentifierLoc(), II, |
| 3058 | R, TInfo, SC, SCAsWritten); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3059 | |
| 3060 | if (D.isInvalidType()) |
| 3061 | NewVD->setInvalidDecl(); |
| 3062 | } else { |
| 3063 | if (DC->isRecord() && !CurContext->isRecord()) { |
| 3064 | // This is an out-of-line definition of a static data member. |
| 3065 | if (SC == SC_Static) { |
| 3066 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), |
| 3067 | diag::err_static_out_of_line) |
| 3068 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); |
| 3069 | } else if (SC == SC_None) |
| 3070 | SC = SC_Static; |
Anders Carlsson | e98da2e | 2009-06-24 00:28:53 +0000 | [diff] [blame] | 3071 | } |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3072 | if (SC == SC_Static) { |
| 3073 | if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(DC)) { |
| 3074 | if (RD->isLocalClass()) |
| 3075 | Diag(D.getIdentifierLoc(), |
| 3076 | diag::err_static_data_member_not_allowed_in_local_class) |
| 3077 | << Name << RD->getDeclName(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3078 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3079 | // C++ [class.union]p1: If a union contains a static data member, |
| 3080 | // the program is ill-formed. |
| 3081 | // |
| 3082 | // We also disallow static data members in anonymous structs. |
| 3083 | if (CurContext->isRecord() && (RD->isUnion() || !RD->getDeclName())) |
| 3084 | Diag(D.getIdentifierLoc(), |
| 3085 | diag::err_static_data_member_not_allowed_in_union_or_anon_struct) |
| 3086 | << Name << RD->isUnion(); |
| 3087 | } |
| 3088 | } |
| 3089 | |
| 3090 | // Match up the template parameter lists with the scope specifier, then |
| 3091 | // determine whether we have a template or a template specialization. |
| 3092 | isExplicitSpecialization = false; |
| 3093 | unsigned NumMatchedTemplateParamLists = TemplateParamLists.size(); |
| 3094 | bool Invalid = false; |
| 3095 | if (TemplateParameterList *TemplateParams |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 3096 | = MatchTemplateParametersToScopeSpecifier( |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3097 | D.getDeclSpec().getSourceRange().getBegin(), |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 3098 | D.getCXXScopeSpec(), |
John McCall | 9a34edb | 2010-10-19 01:40:49 +0000 | [diff] [blame] | 3099 | TemplateParamLists.get(), |
| 3100 | TemplateParamLists.size(), |
John McCall | 77e8b11 | 2010-04-13 20:37:33 +0000 | [diff] [blame] | 3101 | /*never a friend*/ false, |
Douglas Gregor | 0167f3c | 2010-07-14 23:14:12 +0000 | [diff] [blame] | 3102 | isExplicitSpecialization, |
| 3103 | Invalid)) { |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3104 | // All but one template parameter lists have been matching. |
| 3105 | --NumMatchedTemplateParamLists; |
Abramo Bagnara | 9b93488 | 2010-06-12 08:15:14 +0000 | [diff] [blame] | 3106 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3107 | if (TemplateParams->size() > 0) { |
| 3108 | // There is no such thing as a variable template. |
| 3109 | Diag(D.getIdentifierLoc(), diag::err_template_variable) |
| 3110 | << II |
| 3111 | << SourceRange(TemplateParams->getTemplateLoc(), |
| 3112 | TemplateParams->getRAngleLoc()); |
| 3113 | return 0; |
| 3114 | } else { |
| 3115 | // There is an extraneous 'template<>' for this variable. Complain |
| 3116 | // about it, but allow the declaration of the variable. |
| 3117 | Diag(TemplateParams->getTemplateLoc(), |
| 3118 | diag::err_template_variable_noparams) |
| 3119 | << II |
| 3120 | << SourceRange(TemplateParams->getTemplateLoc(), |
| 3121 | TemplateParams->getRAngleLoc()); |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 3122 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3123 | isExplicitSpecialization = true; |
| 3124 | } |
Douglas Gregor | dfe3f2d | 2009-07-22 17:18:37 +0000 | [diff] [blame] | 3125 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3126 | |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 3127 | NewVD = VarDecl::Create(Context, DC, D.getSourceRange().getBegin(), |
| 3128 | D.getIdentifierLoc(), II, |
| 3129 | R, TInfo, SC, SCAsWritten); |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 3130 | |
Richard Smith | 483b9f3 | 2011-02-21 20:05:19 +0000 | [diff] [blame] | 3131 | // If this decl has an auto type in need of deduction, make a note of the |
| 3132 | // Decl so we can diagnose uses of it in its own initializer. |
| 3133 | if (D.getDeclSpec().getTypeSpecType() == DeclSpec::TST_auto && |
| 3134 | R->getContainedAutoType()) |
| 3135 | ParsingInitForAutoVars.insert(NewVD); |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 3136 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3137 | if (D.isInvalidType() || Invalid) |
| 3138 | NewVD->setInvalidDecl(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3139 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3140 | SetNestedNameSpecifier(NewVD, D); |
John McCall | b621766 | 2010-03-15 10:12:16 +0000 | [diff] [blame] | 3141 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3142 | if (NumMatchedTemplateParamLists > 0 && D.getCXXScopeSpec().isSet()) { |
| 3143 | NewVD->setTemplateParameterListsInfo(Context, |
| 3144 | NumMatchedTemplateParamLists, |
| 3145 | TemplateParamLists.release()); |
| 3146 | } |
Abramo Bagnara | 9b93488 | 2010-06-12 08:15:14 +0000 | [diff] [blame] | 3147 | } |
| 3148 | |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 3149 | if (D.getDeclSpec().isThreadSpecified()) { |
| 3150 | if (NewVD->hasLocalStorage()) |
| 3151 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_thread_non_global); |
Eli Friedman | 4fb71b0 | 2009-04-19 21:48:33 +0000 | [diff] [blame] | 3152 | else if (!Context.Target.isTLSSupported()) |
| 3153 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_thread_unsupported); |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 3154 | else |
| 3155 | NewVD->setThreadSpecified(true); |
| 3156 | } |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 3157 | |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 3158 | // Set the lexical context. If the declarator has a C++ scope specifier, the |
| 3159 | // lexical context will be different from the semantic context. |
| 3160 | NewVD->setLexicalDeclContext(CurContext); |
| 3161 | |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3162 | // Handle attributes prior to checking for duplicates in MergeVarDecl |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 3163 | ProcessDeclAttributes(S, NewVD, D); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3164 | |
| 3165 | // Handle GNU asm-label extension (encoded as an attribute). |
Chris Lattner | 16c5dea | 2010-10-10 18:16:20 +0000 | [diff] [blame] | 3166 | if (Expr *E = (Expr*)D.getAsmLabel()) { |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3167 | // The parser guarantees this is a string. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3168 | StringLiteral *SE = cast<StringLiteral>(E); |
Rafael Espindola | baf8695 | 2011-01-01 21:47:03 +0000 | [diff] [blame] | 3169 | llvm::StringRef Label = SE->getString(); |
Abramo Bagnara | 2b57aef | 2011-01-11 15:16:52 +0000 | [diff] [blame] | 3170 | if (S->getFnParent() != 0) { |
| 3171 | switch (SC) { |
| 3172 | case SC_None: |
| 3173 | case SC_Auto: |
| 3174 | Diag(E->getExprLoc(), diag::warn_asm_label_on_auto_decl) << Label; |
| 3175 | break; |
| 3176 | case SC_Register: |
| 3177 | if (!Context.Target.isValidGCCRegisterName(Label)) |
| 3178 | Diag(E->getExprLoc(), diag::err_asm_unknown_register_name) << Label; |
| 3179 | break; |
| 3180 | case SC_Static: |
| 3181 | case SC_Extern: |
| 3182 | case SC_PrivateExtern: |
| 3183 | break; |
| 3184 | } |
| 3185 | } |
| 3186 | |
| 3187 | NewVD->addAttr(::new (Context) AsmLabelAttr(SE->getStrTokenLoc(0), |
Rafael Espindola | baf8695 | 2011-01-01 21:47:03 +0000 | [diff] [blame] | 3188 | Context, Label)); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3189 | } |
| 3190 | |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3191 | // Diagnose shadowed variables before filtering for scope. |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 3192 | if (!D.getCXXScopeSpec().isSet()) |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 3193 | CheckShadow(S, NewVD, Previous); |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3194 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3195 | // Don't consider existing declarations that are in a different |
| 3196 | // scope and are out-of-semantic-context declarations (if the new |
| 3197 | // declaration has linkage). |
Douglas Gregor | cc20945 | 2011-03-07 16:54:27 +0000 | [diff] [blame] | 3198 | FilterLookupForScope(*this, Previous, DC, S, NewVD->hasLinkage(), |
| 3199 | isExplicitSpecialization); |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 3200 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3201 | if (!getLangOptions().CPlusPlus) |
| 3202 | CheckVariableDeclaration(NewVD, Previous, Redeclaration); |
| 3203 | else { |
| 3204 | // Merge the decl with the existing one if appropriate. |
| 3205 | if (!Previous.empty()) { |
| 3206 | if (Previous.isSingleResult() && |
| 3207 | isa<FieldDecl>(Previous.getFoundDecl()) && |
| 3208 | D.getCXXScopeSpec().isSet()) { |
| 3209 | // The user tried to define a non-static data member |
| 3210 | // out-of-line (C++ [dcl.meaning]p1). |
| 3211 | Diag(NewVD->getLocation(), diag::err_nonstatic_member_out_of_line) |
| 3212 | << D.getCXXScopeSpec().getRange(); |
| 3213 | Previous.clear(); |
| 3214 | NewVD->setInvalidDecl(); |
| 3215 | } |
| 3216 | } else if (D.getCXXScopeSpec().isSet()) { |
| 3217 | // No previous declaration in the qualifying scope. |
| 3218 | Diag(D.getIdentifierLoc(), diag::err_no_member) |
| 3219 | << Name << computeDeclContext(D.getCXXScopeSpec(), true) |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3220 | << D.getCXXScopeSpec().getRange(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3221 | NewVD->setInvalidDecl(); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3222 | } |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3223 | |
| 3224 | CheckVariableDeclaration(NewVD, Previous, Redeclaration); |
| 3225 | |
| 3226 | // This is an explicit specialization of a static data member. Check it. |
| 3227 | if (isExplicitSpecialization && !NewVD->isInvalidDecl() && |
| 3228 | CheckMemberSpecialization(NewVD, Previous)) |
| 3229 | NewVD->setInvalidDecl(); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3230 | } |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3231 | |
Ryan Flynn | 478fbc6 | 2009-07-25 22:29:44 +0000 | [diff] [blame] | 3232 | // attributes declared post-definition are currently ignored |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 3233 | // FIXME: This should be handled in attribute merging, not |
| 3234 | // here. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3235 | if (Previous.isSingleResult()) { |
Sebastian Redl | 31310a2 | 2010-02-01 20:16:42 +0000 | [diff] [blame] | 3236 | VarDecl *Def = dyn_cast<VarDecl>(Previous.getFoundDecl()); |
| 3237 | if (Def && (Def = Def->getDefinition()) && |
| 3238 | Def != NewVD && D.hasAttributes()) { |
Ryan Flynn | 478fbc6 | 2009-07-25 22:29:44 +0000 | [diff] [blame] | 3239 | Diag(NewVD->getLocation(), diag::warn_attribute_precede_definition); |
| 3240 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 3241 | } |
| 3242 | } |
| 3243 | |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3244 | // If this is a locally-scoped extern C variable, update the map of |
| 3245 | // such variables. |
Douglas Gregor | 48a83b5 | 2009-09-12 00:17:51 +0000 | [diff] [blame] | 3246 | if (CurContext->isFunctionOrMethod() && NewVD->isExternC() && |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3247 | !NewVD->isInvalidDecl()) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3248 | RegisterLocallyScopedExternCDecl(NewVD, Previous, S); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3249 | |
Eli Friedman | aa8b0d1 | 2010-08-05 06:57:20 +0000 | [diff] [blame] | 3250 | // If there's a #pragma GCC visibility in scope, and this isn't a class |
| 3251 | // member, set the visibility of this variable. |
| 3252 | if (NewVD->getLinkage() == ExternalLinkage && !DC->isRecord()) |
| 3253 | AddPushedVisibilityAttribute(NewVD); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3254 | |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 3255 | MarkUnusedFileScopedDecl(NewVD); |
| 3256 | |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3257 | return NewVD; |
| 3258 | } |
| 3259 | |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 3260 | /// \brief Diagnose variable or built-in function shadowing. Implements |
| 3261 | /// -Wshadow. |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3262 | /// |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 3263 | /// This method is called whenever a VarDecl is added to a "useful" |
| 3264 | /// scope. |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3265 | /// |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 3266 | /// \param S the scope in which the shadowing name is being declared |
| 3267 | /// \param R the lookup of the name |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3268 | /// |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 3269 | void Sema::CheckShadow(Scope *S, VarDecl *D, const LookupResult& R) { |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3270 | // Return if warning is ignored. |
Argyrios Kyrtzidis | 0827408 | 2010-12-15 18:44:22 +0000 | [diff] [blame] | 3271 | if (Diags.getDiagnosticLevel(diag::warn_decl_shadow, R.getNameLoc()) == |
| 3272 | Diagnostic::Ignored) |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3273 | return; |
| 3274 | |
Argyrios Kyrtzidis | 651f86f | 2011-02-08 18:21:25 +0000 | [diff] [blame] | 3275 | // Don't diagnose declarations at file scope. |
| 3276 | DeclContext *NewDC = D->getDeclContext(); |
| 3277 | if (NewDC->isFileContext()) |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3278 | return; |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 3279 | |
| 3280 | // Only diagnose if we're shadowing an unambiguous field or variable. |
Douglas Gregor | c48c916 | 2010-03-17 16:03:44 +0000 | [diff] [blame] | 3281 | if (R.getResultKind() != LookupResult::Found) |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3282 | return; |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3283 | |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3284 | NamedDecl* ShadowedDecl = R.getFoundDecl(); |
| 3285 | if (!isa<VarDecl>(ShadowedDecl) && !isa<FieldDecl>(ShadowedDecl)) |
| 3286 | return; |
| 3287 | |
Argyrios Kyrtzidis | 36eb5e4 | 2011-01-31 07:04:54 +0000 | [diff] [blame] | 3288 | // Fields are not shadowed by variables in C++ static methods. |
| 3289 | if (isa<FieldDecl>(ShadowedDecl)) |
| 3290 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(NewDC)) |
| 3291 | if (MD->isStatic()) |
| 3292 | return; |
| 3293 | |
Argyrios Kyrtzidis | 49a6172 | 2011-01-31 07:04:50 +0000 | [diff] [blame] | 3294 | if (VarDecl *shadowedVar = dyn_cast<VarDecl>(ShadowedDecl)) |
| 3295 | if (shadowedVar->isExternC()) { |
| 3296 | // Don't warn for this case: |
| 3297 | // |
| 3298 | // @code |
| 3299 | // extern int bob; |
| 3300 | // void f() { |
| 3301 | // extern int bob; |
| 3302 | // } |
| 3303 | // @endcode |
| 3304 | if (D->isExternC()) |
Argyrios Kyrtzidis | 6df96e0 | 2011-01-31 07:04:41 +0000 | [diff] [blame] | 3305 | return; |
| 3306 | |
Argyrios Kyrtzidis | 49a6172 | 2011-01-31 07:04:50 +0000 | [diff] [blame] | 3307 | // For shadowing external vars, make sure that we point to the global |
| 3308 | // declaration, not a locally scoped extern declaration. |
| 3309 | for (VarDecl::redecl_iterator |
| 3310 | I = shadowedVar->redecls_begin(), E = shadowedVar->redecls_end(); |
| 3311 | I != E; ++I) |
| 3312 | if (I->isFileVarDecl()) { |
| 3313 | ShadowedDecl = *I; |
| 3314 | break; |
| 3315 | } |
| 3316 | } |
| 3317 | |
| 3318 | DeclContext *OldDC = ShadowedDecl->getDeclContext(); |
| 3319 | |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 3320 | // Only warn about certain kinds of shadowing for class members. |
| 3321 | if (NewDC && NewDC->isRecord()) { |
| 3322 | // In particular, don't warn about shadowing non-class members. |
| 3323 | if (!OldDC->isRecord()) |
| 3324 | return; |
| 3325 | |
| 3326 | // TODO: should we warn about static data members shadowing |
| 3327 | // static data members from base classes? |
| 3328 | |
| 3329 | // TODO: don't diagnose for inaccessible shadowed members. |
| 3330 | // This is hard to do perfectly because we might friend the |
| 3331 | // shadowing context, but that's just a false negative. |
| 3332 | } |
| 3333 | |
| 3334 | // Determine what kind of declaration we're shadowing. |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3335 | unsigned Kind; |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 3336 | if (isa<RecordDecl>(OldDC)) { |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3337 | if (isa<FieldDecl>(ShadowedDecl)) |
| 3338 | Kind = 3; // field |
| 3339 | else |
| 3340 | Kind = 2; // static data member |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 3341 | } else if (OldDC->isFileContext()) |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3342 | Kind = 1; // global |
| 3343 | else |
| 3344 | Kind = 0; // local |
| 3345 | |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 3346 | DeclarationName Name = R.getLookupName(); |
| 3347 | |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3348 | // Emit warning and note. |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 3349 | Diag(R.getNameLoc(), diag::warn_decl_shadow) << Name << Kind << OldDC; |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 3350 | Diag(ShadowedDecl->getLocation(), diag::note_previous_declaration); |
| 3351 | } |
| 3352 | |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 3353 | /// \brief Check -Wshadow without the advantage of a previous lookup. |
| 3354 | void Sema::CheckShadow(Scope *S, VarDecl *D) { |
Argyrios Kyrtzidis | 0827408 | 2010-12-15 18:44:22 +0000 | [diff] [blame] | 3355 | if (Diags.getDiagnosticLevel(diag::warn_decl_shadow, D->getLocation()) == |
| 3356 | Diagnostic::Ignored) |
| 3357 | return; |
| 3358 | |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 3359 | LookupResult R(*this, D->getDeclName(), D->getLocation(), |
| 3360 | Sema::LookupOrdinaryName, Sema::ForRedeclaration); |
| 3361 | LookupName(R, S); |
| 3362 | CheckShadow(S, D, R); |
| 3363 | } |
| 3364 | |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3365 | /// \brief Perform semantic checking on a newly-created variable |
| 3366 | /// declaration. |
| 3367 | /// |
| 3368 | /// This routine performs all of the type-checking required for a |
Douglas Gregor | 180bb63 | 2009-05-01 15:47:09 +0000 | [diff] [blame] | 3369 | /// variable declaration once it has been built. It is used both to |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3370 | /// check variables after they have been parsed and their declarators |
Douglas Gregor | 180bb63 | 2009-05-01 15:47:09 +0000 | [diff] [blame] | 3371 | /// have been translated into a declaration, and to check variables |
| 3372 | /// that have been instantiated from a template. |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3373 | /// |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3374 | /// Sets NewVD->isInvalidDecl() if an error was encountered. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3375 | void Sema::CheckVariableDeclaration(VarDecl *NewVD, |
| 3376 | LookupResult &Previous, |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3377 | bool &Redeclaration) { |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3378 | // If the decl is already known invalid, don't check it. |
| 3379 | if (NewVD->isInvalidDecl()) |
| 3380 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3381 | |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3382 | QualType T = NewVD->getType(); |
| 3383 | |
John McCall | c12c5bb | 2010-05-15 11:32:37 +0000 | [diff] [blame] | 3384 | if (T->isObjCObjectType()) { |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3385 | Diag(NewVD->getLocation(), diag::err_statically_allocated_object); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3386 | return NewVD->setInvalidDecl(); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3387 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3388 | |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3389 | // Emit an error if an address space was applied to decl with local storage. |
| 3390 | // This includes arrays of objects with address space qualifiers, but not |
| 3391 | // automatic variables that point to other address spaces. |
| 3392 | // ISO/IEC TR 18037 S5.1.2 |
Chris Lattner | 16c5dea | 2010-10-10 18:16:20 +0000 | [diff] [blame] | 3393 | if (NewVD->hasLocalStorage() && T.getAddressSpace() != 0) { |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3394 | Diag(NewVD->getLocation(), diag::err_as_qualified_auto_decl); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3395 | return NewVD->setInvalidDecl(); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3396 | } |
Fariborz Jahanian | 7b5b317 | 2009-02-21 19:44:02 +0000 | [diff] [blame] | 3397 | |
Mike Stump | f33651c | 2009-04-14 00:57:29 +0000 | [diff] [blame] | 3398 | if (NewVD->hasLocalStorage() && T.isObjCGCWeak() |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 3399 | && !NewVD->hasAttr<BlocksAttr>()) |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3400 | Diag(NewVD->getLocation(), diag::warn_attribute_weak_on_local); |
Chris Lattner | 16c5dea | 2010-10-10 18:16:20 +0000 | [diff] [blame] | 3401 | |
Chris Lattner | 38c5ebd | 2009-04-19 05:21:20 +0000 | [diff] [blame] | 3402 | bool isVM = T->isVariablyModifiedType(); |
Chris Lattner | be6d259 | 2009-07-19 20:17:11 +0000 | [diff] [blame] | 3403 | if (isVM || NewVD->hasAttr<CleanupAttr>() || |
John McCall | e46f62c | 2010-08-01 01:24:59 +0000 | [diff] [blame] | 3404 | NewVD->hasAttr<BlocksAttr>()) |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 3405 | getCurFunction()->setHasBranchProtectedScope(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3406 | |
Chris Lattner | 38c5ebd | 2009-04-19 05:21:20 +0000 | [diff] [blame] | 3407 | if ((isVM && NewVD->hasLinkage()) || |
| 3408 | (T->isVariableArrayType() && NewVD->hasGlobalStorage())) { |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 3409 | bool SizeIsNegative; |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 3410 | llvm::APSInt Oversized; |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 3411 | QualType FixedTy = |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 3412 | TryToFixInvalidVariablyModifiedType(T, Context, SizeIsNegative, |
| 3413 | Oversized); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3414 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3415 | if (FixedTy.isNull() && T->isVariableArrayType()) { |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3416 | const VariableArrayType *VAT = Context.getAsVariableArrayType(T); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3417 | // FIXME: This won't give the correct result for |
| 3418 | // int a[10][n]; |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 3419 | SourceRange SizeRange = VAT->getSizeExpr()->getSourceRange(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3420 | |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 3421 | if (NewVD->isFileVarDecl()) |
| 3422 | Diag(NewVD->getLocation(), diag::err_vla_decl_in_file_scope) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3423 | << SizeRange; |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 3424 | else if (NewVD->getStorageClass() == SC_Static) |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 3425 | Diag(NewVD->getLocation(), diag::err_vla_decl_has_static_storage) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3426 | << SizeRange; |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 3427 | else |
| 3428 | Diag(NewVD->getLocation(), diag::err_vla_decl_has_extern_linkage) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3429 | << SizeRange; |
| 3430 | return NewVD->setInvalidDecl(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3431 | } |
| 3432 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3433 | if (FixedTy.isNull()) { |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 3434 | if (NewVD->isFileVarDecl()) |
| 3435 | Diag(NewVD->getLocation(), diag::err_vm_decl_in_file_scope); |
| 3436 | else |
| 3437 | Diag(NewVD->getLocation(), diag::err_vm_decl_has_extern_linkage); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3438 | return NewVD->setInvalidDecl(); |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 3439 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3440 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3441 | Diag(NewVD->getLocation(), diag::warn_illegal_constant_array_size); |
| 3442 | NewVD->setType(FixedTy); |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 3443 | } |
| 3444 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3445 | if (Previous.empty() && NewVD->isExternC()) { |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 3446 | // Since we did not find anything by this name and we're declaring |
| 3447 | // an extern "C" variable, look for a non-visible extern "C" |
| 3448 | // declaration with the same name. |
| 3449 | llvm::DenseMap<DeclarationName, NamedDecl *>::iterator Pos |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3450 | = LocallyScopedExternalDecls.find(NewVD->getDeclName()); |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 3451 | if (Pos != LocallyScopedExternalDecls.end()) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3452 | Previous.addDecl(Pos->second); |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 3453 | } |
| 3454 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3455 | if (T->isVoidType() && !NewVD->hasExternalStorage()) { |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3456 | Diag(NewVD->getLocation(), diag::err_typecheck_decl_incomplete_type) |
| 3457 | << T; |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3458 | return NewVD->setInvalidDecl(); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3459 | } |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3460 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 3461 | if (!NewVD->hasLocalStorage() && NewVD->hasAttr<BlocksAttr>()) { |
Mike Stump | ea000bf | 2009-04-30 00:19:40 +0000 | [diff] [blame] | 3462 | Diag(NewVD->getLocation(), diag::err_block_on_nonlocal); |
| 3463 | return NewVD->setInvalidDecl(); |
| 3464 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3465 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 3466 | if (isVM && NewVD->hasAttr<BlocksAttr>()) { |
Mike Stump | c975bb0 | 2009-05-01 23:41:47 +0000 | [diff] [blame] | 3467 | Diag(NewVD->getLocation(), diag::err_block_on_vm); |
| 3468 | return NewVD->setInvalidDecl(); |
| 3469 | } |
| 3470 | |
Sebastian Redl | f9ea1f3 | 2010-07-12 23:11:43 +0000 | [diff] [blame] | 3471 | // Function pointers and references cannot have qualified function type, only |
| 3472 | // function pointer-to-members can do that. |
| 3473 | QualType Pointee; |
| 3474 | unsigned PtrOrRef = 0; |
| 3475 | if (const PointerType *Ptr = T->getAs<PointerType>()) |
| 3476 | Pointee = Ptr->getPointeeType(); |
| 3477 | else if (const ReferenceType *Ref = T->getAs<ReferenceType>()) { |
| 3478 | Pointee = Ref->getPointeeType(); |
| 3479 | PtrOrRef = 1; |
| 3480 | } |
| 3481 | if (!Pointee.isNull() && Pointee->isFunctionProtoType() && |
| 3482 | Pointee->getAs<FunctionProtoType>()->getTypeQuals() != 0) { |
| 3483 | Diag(NewVD->getLocation(), diag::err_invalid_qualified_function_pointer) |
| 3484 | << PtrOrRef; |
| 3485 | return NewVD->setInvalidDecl(); |
| 3486 | } |
| 3487 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3488 | if (!Previous.empty()) { |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 3489 | Redeclaration = true; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3490 | MergeVarDecl(NewVD, Previous); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3491 | } |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 3492 | } |
| 3493 | |
Douglas Gregor | a8f32e0 | 2009-10-06 17:59:45 +0000 | [diff] [blame] | 3494 | /// \brief Data used with FindOverriddenMethod |
| 3495 | struct FindOverriddenMethodData { |
| 3496 | Sema *S; |
| 3497 | CXXMethodDecl *Method; |
| 3498 | }; |
| 3499 | |
| 3500 | /// \brief Member lookup function that determines whether a given C++ |
| 3501 | /// method overrides a method in a base class, to be used with |
| 3502 | /// CXXRecordDecl::lookupInBases(). |
John McCall | af8e6ed | 2009-11-12 03:15:40 +0000 | [diff] [blame] | 3503 | static bool FindOverriddenMethod(const CXXBaseSpecifier *Specifier, |
Douglas Gregor | a8f32e0 | 2009-10-06 17:59:45 +0000 | [diff] [blame] | 3504 | CXXBasePath &Path, |
| 3505 | void *UserData) { |
| 3506 | RecordDecl *BaseRecord = Specifier->getType()->getAs<RecordType>()->getDecl(); |
Anders Carlsson | 9549680 | 2009-11-26 20:50:40 +0000 | [diff] [blame] | 3507 | |
Douglas Gregor | a8f32e0 | 2009-10-06 17:59:45 +0000 | [diff] [blame] | 3508 | FindOverriddenMethodData *Data |
| 3509 | = reinterpret_cast<FindOverriddenMethodData*>(UserData); |
Anders Carlsson | 9549680 | 2009-11-26 20:50:40 +0000 | [diff] [blame] | 3510 | |
| 3511 | DeclarationName Name = Data->Method->getDeclName(); |
| 3512 | |
| 3513 | // FIXME: Do we care about other names here too? |
| 3514 | if (Name.getNameKind() == DeclarationName::CXXDestructorName) { |
John McCall | ad00b77 | 2010-06-16 08:42:20 +0000 | [diff] [blame] | 3515 | // We really want to find the base class destructor here. |
Anders Carlsson | 9549680 | 2009-11-26 20:50:40 +0000 | [diff] [blame] | 3516 | QualType T = Data->S->Context.getTypeDeclType(BaseRecord); |
| 3517 | CanQualType CT = Data->S->Context.getCanonicalType(T); |
| 3518 | |
Anders Carlsson | 1a68972 | 2009-11-27 01:26:58 +0000 | [diff] [blame] | 3519 | Name = Data->S->Context.DeclarationNames.getCXXDestructorName(CT); |
Anders Carlsson | 9549680 | 2009-11-26 20:50:40 +0000 | [diff] [blame] | 3520 | } |
| 3521 | |
| 3522 | for (Path.Decls = BaseRecord->lookup(Name); |
Douglas Gregor | a8f32e0 | 2009-10-06 17:59:45 +0000 | [diff] [blame] | 3523 | Path.Decls.first != Path.Decls.second; |
| 3524 | ++Path.Decls.first) { |
John McCall | 52a0275 | 2010-06-16 09:33:39 +0000 | [diff] [blame] | 3525 | NamedDecl *D = *Path.Decls.first; |
John McCall | ad00b77 | 2010-06-16 08:42:20 +0000 | [diff] [blame] | 3526 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { |
| 3527 | if (MD->isVirtual() && !Data->S->IsOverload(Data->Method, MD, false)) |
Douglas Gregor | a8f32e0 | 2009-10-06 17:59:45 +0000 | [diff] [blame] | 3528 | return true; |
| 3529 | } |
| 3530 | } |
| 3531 | |
| 3532 | return false; |
| 3533 | } |
| 3534 | |
Sebastian Redl | a165da0 | 2009-11-18 21:51:29 +0000 | [diff] [blame] | 3535 | /// AddOverriddenMethods - See if a method overrides any in the base classes, |
| 3536 | /// 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] | 3537 | bool Sema::AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD) { |
Sebastian Redl | a165da0 | 2009-11-18 21:51:29 +0000 | [diff] [blame] | 3538 | // Look for virtual methods in base classes that this method might override. |
| 3539 | CXXBasePaths Paths; |
| 3540 | FindOverriddenMethodData Data; |
| 3541 | Data.Method = MD; |
| 3542 | Data.S = this; |
Douglas Gregor | a6c1e3a | 2010-10-13 22:55:32 +0000 | [diff] [blame] | 3543 | bool AddedAny = false; |
Sebastian Redl | a165da0 | 2009-11-18 21:51:29 +0000 | [diff] [blame] | 3544 | if (DC->lookupInBases(&FindOverriddenMethod, &Data, Paths)) { |
| 3545 | for (CXXBasePaths::decl_iterator I = Paths.found_decls_begin(), |
| 3546 | E = Paths.found_decls_end(); I != E; ++I) { |
| 3547 | if (CXXMethodDecl *OldMD = dyn_cast<CXXMethodDecl>(*I)) { |
| 3548 | if (!CheckOverridingFunctionReturnType(MD, OldMD) && |
Sean Hunt | bbd37c6 | 2009-11-21 08:43:09 +0000 | [diff] [blame] | 3549 | !CheckOverridingFunctionExceptionSpec(MD, OldMD) && |
Anders Carlsson | 2e1c730 | 2011-01-20 16:25:36 +0000 | [diff] [blame] | 3550 | !CheckIfOverriddenFunctionIsMarkedFinal(MD, OldMD)) { |
Anders Carlsson | 3aaf486 | 2009-12-04 05:51:56 +0000 | [diff] [blame] | 3551 | MD->addOverriddenMethod(OldMD->getCanonicalDecl()); |
Douglas Gregor | a6c1e3a | 2010-10-13 22:55:32 +0000 | [diff] [blame] | 3552 | AddedAny = true; |
| 3553 | } |
Sebastian Redl | a165da0 | 2009-11-18 21:51:29 +0000 | [diff] [blame] | 3554 | } |
| 3555 | } |
| 3556 | } |
Douglas Gregor | a6c1e3a | 2010-10-13 22:55:32 +0000 | [diff] [blame] | 3557 | |
| 3558 | return AddedAny; |
Sebastian Redl | a165da0 | 2009-11-18 21:51:29 +0000 | [diff] [blame] | 3559 | } |
| 3560 | |
John McCall | 29ae6e5 | 2010-10-13 05:45:15 +0000 | [diff] [blame] | 3561 | static void DiagnoseInvalidRedeclaration(Sema &S, FunctionDecl *NewFD) { |
| 3562 | LookupResult Prev(S, NewFD->getDeclName(), NewFD->getLocation(), |
| 3563 | Sema::LookupOrdinaryName, Sema::ForRedeclaration); |
| 3564 | S.LookupQualifiedName(Prev, NewFD->getDeclContext()); |
| 3565 | assert(!Prev.isAmbiguous() && |
| 3566 | "Cannot have an ambiguity in previous-declaration lookup"); |
| 3567 | for (LookupResult::iterator Func = Prev.begin(), FuncEnd = Prev.end(); |
| 3568 | Func != FuncEnd; ++Func) { |
| 3569 | if (isa<FunctionDecl>(*Func) && |
| 3570 | isNearlyMatchingFunction(S.Context, cast<FunctionDecl>(*Func), NewFD)) |
| 3571 | S.Diag((*Func)->getLocation(), diag::note_member_def_close_match); |
| 3572 | } |
| 3573 | } |
| 3574 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3575 | NamedDecl* |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3576 | Sema::ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 3577 | QualType R, TypeSourceInfo *TInfo, |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3578 | LookupResult &Previous, |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 3579 | MultiTemplateParamsArg TemplateParamLists, |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3580 | bool IsFunctionDefinition, bool &Redeclaration) { |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3581 | assert(R.getTypePtr()->isFunctionType()); |
| 3582 | |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 3583 | // TODO: consider using NameInfo for diagnostic. |
| 3584 | DeclarationNameInfo NameInfo = GetNameForDeclarator(D); |
| 3585 | DeclarationName Name = NameInfo.getName(); |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 3586 | FunctionDecl::StorageClass SC = SC_None; |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3587 | switch (D.getDeclSpec().getStorageClassSpec()) { |
| 3588 | default: assert(0 && "Unknown storage class!"); |
| 3589 | case DeclSpec::SCS_auto: |
| 3590 | case DeclSpec::SCS_register: |
| 3591 | case DeclSpec::SCS_mutable: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3592 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 3593 | diag::err_typecheck_sclass_func); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3594 | D.setInvalidType(); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3595 | break; |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 3596 | case DeclSpec::SCS_unspecified: SC = SC_None; break; |
| 3597 | case DeclSpec::SCS_extern: SC = SC_Extern; break; |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 3598 | case DeclSpec::SCS_static: { |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 3599 | if (CurContext->getRedeclContext()->isFunctionOrMethod()) { |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 3600 | // C99 6.7.1p5: |
| 3601 | // The declaration of an identifier for a function that has |
| 3602 | // block scope shall have no explicit storage-class specifier |
| 3603 | // other than extern |
| 3604 | // See also (C++ [dcl.stc]p4). |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3605 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 3606 | diag::err_static_block_func); |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 3607 | SC = SC_None; |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 3608 | } else |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 3609 | SC = SC_Static; |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 3610 | break; |
| 3611 | } |
Gabor Greif | a4a301d | 2010-09-08 00:31:13 +0000 | [diff] [blame] | 3612 | case DeclSpec::SCS_private_extern: SC = SC_PrivateExtern; break; |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3613 | } |
| 3614 | |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 3615 | if (D.getDeclSpec().isThreadSpecified()) |
| 3616 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_invalid_thread); |
| 3617 | |
Chris Lattner | bb74982 | 2009-04-11 19:17:25 +0000 | [diff] [blame] | 3618 | // Do not allow returning a objc interface by-value. |
John McCall | c12c5bb | 2010-05-15 11:32:37 +0000 | [diff] [blame] | 3619 | if (R->getAs<FunctionType>()->getResultType()->isObjCObjectType()) { |
Chris Lattner | bb74982 | 2009-04-11 19:17:25 +0000 | [diff] [blame] | 3620 | Diag(D.getIdentifierLoc(), |
| 3621 | diag::err_object_cannot_be_passed_returned_by_value) << 0 |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3622 | << R->getAs<FunctionType>()->getResultType(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3623 | D.setInvalidType(); |
Chris Lattner | bb74982 | 2009-04-11 19:17:25 +0000 | [diff] [blame] | 3624 | } |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3625 | |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3626 | FunctionDecl *NewFD; |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3627 | bool isInline = D.getDeclSpec().isInlineSpecified(); |
Douglas Gregor | 3922ed0 | 2010-12-10 19:28:19 +0000 | [diff] [blame] | 3628 | bool isFriend = false; |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3629 | DeclSpec::SCS SCSpec = D.getDeclSpec().getStorageClassSpecAsWritten(); |
| 3630 | FunctionDecl::StorageClass SCAsWritten |
| 3631 | = StorageClassSpecToFunctionDeclStorageClass(SCSpec); |
Douglas Gregor | 3922ed0 | 2010-12-10 19:28:19 +0000 | [diff] [blame] | 3632 | FunctionTemplateDecl *FunctionTemplate = 0; |
| 3633 | bool isExplicitSpecialization = false; |
| 3634 | bool isFunctionTemplateSpecialization = false; |
| 3635 | unsigned NumMatchedTemplateParamLists = 0; |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3636 | |
| 3637 | if (!getLangOptions().CPlusPlus) { |
Douglas Gregor | d874def | 2009-03-19 18:33:54 +0000 | [diff] [blame] | 3638 | // Determine whether the function was written with a |
| 3639 | // prototype. This true when: |
Douglas Gregor | d874def | 2009-03-19 18:33:54 +0000 | [diff] [blame] | 3640 | // - there is a prototype in the declarator, or |
| 3641 | // - the type R of the function is some kind of typedef or other reference |
| 3642 | // to a type name (which eventually refers to a function type). |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3643 | bool HasPrototype = |
Abramo Bagnara | 075f8f1 | 2010-12-10 16:29:40 +0000 | [diff] [blame] | 3644 | (D.isFunctionDeclarator() && D.getFunctionTypeInfo().hasPrototype) || |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3645 | (!isa<FunctionType>(R.getTypePtr()) && R->isFunctionProtoType()); |
| 3646 | |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 3647 | NewFD = FunctionDecl::Create(Context, DC, D.getSourceRange().getBegin(), |
Abramo Bagnara | 2577743 | 2010-08-11 22:01:17 +0000 | [diff] [blame] | 3648 | NameInfo, R, TInfo, SC, SCAsWritten, isInline, |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 3649 | HasPrototype); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3650 | if (D.isInvalidType()) |
| 3651 | NewFD->setInvalidDecl(); |
| 3652 | |
| 3653 | // Set the lexical context. |
| 3654 | NewFD->setLexicalDeclContext(CurContext); |
| 3655 | // Filter out previous declarations that don't match the scope. |
Douglas Gregor | cc20945 | 2011-03-07 16:54:27 +0000 | [diff] [blame] | 3656 | FilterLookupForScope(*this, Previous, DC, S, NewFD->hasLinkage(), |
| 3657 | /*ExplicitInstantiationOrSpecialization=*/false); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3658 | } else { |
| 3659 | isFriend = D.getDeclSpec().isFriendSpecified(); |
Douglas Gregor | 3922ed0 | 2010-12-10 19:28:19 +0000 | [diff] [blame] | 3660 | bool isVirtual = D.getDeclSpec().isVirtualSpecified(); |
| 3661 | bool isExplicit = D.getDeclSpec().isExplicitSpecified(); |
| 3662 | bool isVirtualOkay = false; |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3663 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3664 | // Check that the return type is not an abstract class type. |
| 3665 | // For record types, this is done by the AbstractClassUsageDiagnoser once |
| 3666 | // the class has been completely parsed. |
| 3667 | if (!DC->isRecord() && |
| 3668 | RequireNonAbstractType(D.getIdentifierLoc(), |
| 3669 | R->getAs<FunctionType>()->getResultType(), |
| 3670 | diag::err_abstract_type_in_decl, |
| 3671 | AbstractReturnType)) |
| 3672 | D.setInvalidType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3673 | |
John McCall | b621766 | 2010-03-15 10:12:16 +0000 | [diff] [blame] | 3674 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3675 | if (isFriend) { |
| 3676 | // C++ [class.friend]p5 |
| 3677 | // A function can be defined in a friend declaration of a |
| 3678 | // class . . . . Such a function is implicitly inline. |
| 3679 | isInline |= IsFunctionDefinition; |
| 3680 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3681 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3682 | if (Name.getNameKind() == DeclarationName::CXXConstructorName) { |
| 3683 | // This is a C++ constructor declaration. |
| 3684 | assert(DC->isRecord() && |
| 3685 | "Constructors can only be declared in a member context"); |
| 3686 | |
| 3687 | R = CheckConstructorDeclarator(D, R, SC); |
| 3688 | |
| 3689 | // Create the new declaration |
| 3690 | NewFD = CXXConstructorDecl::Create(Context, |
| 3691 | cast<CXXRecordDecl>(DC), |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 3692 | D.getSourceRange().getBegin(), |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3693 | NameInfo, R, TInfo, |
| 3694 | isExplicit, isInline, |
| 3695 | /*isImplicitlyDeclared=*/false); |
| 3696 | } else if (Name.getNameKind() == DeclarationName::CXXDestructorName) { |
| 3697 | // This is a C++ destructor declaration. |
| 3698 | if (DC->isRecord()) { |
| 3699 | R = CheckDestructorDeclarator(D, R, SC); |
| 3700 | |
| 3701 | NewFD = CXXDestructorDecl::Create(Context, |
| 3702 | cast<CXXRecordDecl>(DC), |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 3703 | D.getSourceRange().getBegin(), |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3704 | NameInfo, R, TInfo, |
| 3705 | isInline, |
| 3706 | /*isImplicitlyDeclared=*/false); |
| 3707 | isVirtualOkay = true; |
| 3708 | } else { |
| 3709 | Diag(D.getIdentifierLoc(), diag::err_destructor_not_member); |
| 3710 | |
| 3711 | // Create a FunctionDecl to satisfy the function definition parsing |
| 3712 | // code path. |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 3713 | NewFD = FunctionDecl::Create(Context, DC, D.getSourceRange().getBegin(), |
| 3714 | D.getIdentifierLoc(), Name, R, TInfo, |
| 3715 | SC, SCAsWritten, isInline, |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3716 | /*hasPrototype=*/true); |
| 3717 | D.setInvalidType(); |
| 3718 | } |
| 3719 | } else if (Name.getNameKind() == DeclarationName::CXXConversionFunctionName) { |
| 3720 | if (!DC->isRecord()) { |
| 3721 | Diag(D.getIdentifierLoc(), |
| 3722 | diag::err_conv_function_not_member); |
| 3723 | return 0; |
| 3724 | } |
| 3725 | |
| 3726 | CheckConversionDeclarator(D, R, SC); |
| 3727 | NewFD = CXXConversionDecl::Create(Context, cast<CXXRecordDecl>(DC), |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 3728 | D.getSourceRange().getBegin(), |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3729 | NameInfo, R, TInfo, |
Douglas Gregor | f525160 | 2011-03-08 17:10:18 +0000 | [diff] [blame] | 3730 | isInline, isExplicit, |
| 3731 | SourceLocation()); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3732 | |
| 3733 | isVirtualOkay = true; |
| 3734 | } else if (DC->isRecord()) { |
| 3735 | // If the of the function is the same as the name of the record, then this |
| 3736 | // must be an invalid constructor that has a return type. |
| 3737 | // (The parser checks for a return type and makes the declarator a |
| 3738 | // constructor if it has no return type). |
| 3739 | // must have an invalid constructor that has a return type |
| 3740 | if (Name.getAsIdentifierInfo() && |
| 3741 | Name.getAsIdentifierInfo() == cast<CXXRecordDecl>(DC)->getIdentifier()){ |
| 3742 | Diag(D.getIdentifierLoc(), diag::err_constructor_return_type) |
| 3743 | << SourceRange(D.getDeclSpec().getTypeSpecTypeLoc()) |
| 3744 | << SourceRange(D.getIdentifierLoc()); |
| 3745 | return 0; |
| 3746 | } |
| 3747 | |
| 3748 | bool isStatic = SC == SC_Static; |
Sebastian Redl | 8999fe1 | 2011-03-14 18:08:30 +0000 | [diff] [blame] | 3749 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3750 | // [class.free]p1: |
| 3751 | // Any allocation function for a class T is a static member |
| 3752 | // (even if not explicitly declared static). |
| 3753 | if (Name.getCXXOverloadedOperator() == OO_New || |
| 3754 | Name.getCXXOverloadedOperator() == OO_Array_New) |
| 3755 | isStatic = true; |
| 3756 | |
| 3757 | // [class.free]p6 Any deallocation function for a class X is a static member |
| 3758 | // (even if not explicitly declared static). |
| 3759 | if (Name.getCXXOverloadedOperator() == OO_Delete || |
| 3760 | Name.getCXXOverloadedOperator() == OO_Array_Delete) |
| 3761 | isStatic = true; |
Sebastian Redl | 8999fe1 | 2011-03-14 18:08:30 +0000 | [diff] [blame] | 3762 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3763 | // This is a C++ method declaration. |
| 3764 | NewFD = CXXMethodDecl::Create(Context, cast<CXXRecordDecl>(DC), |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 3765 | D.getSourceRange().getBegin(), |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3766 | NameInfo, R, TInfo, |
Douglas Gregor | f525160 | 2011-03-08 17:10:18 +0000 | [diff] [blame] | 3767 | isStatic, SCAsWritten, isInline, |
| 3768 | SourceLocation()); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3769 | |
| 3770 | isVirtualOkay = !isStatic; |
| 3771 | } else { |
| 3772 | // Determine whether the function was written with a |
| 3773 | // prototype. This true when: |
| 3774 | // - we're in C++ (where every function has a prototype), |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 3775 | NewFD = FunctionDecl::Create(Context, DC, D.getSourceRange().getBegin(), |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3776 | NameInfo, R, TInfo, SC, SCAsWritten, isInline, |
| 3777 | true/*HasPrototype*/); |
| 3778 | } |
| 3779 | SetNestedNameSpecifier(NewFD, D); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3780 | isExplicitSpecialization = false; |
| 3781 | isFunctionTemplateSpecialization = false; |
| 3782 | NumMatchedTemplateParamLists = TemplateParamLists.size(); |
| 3783 | if (D.isInvalidType()) |
| 3784 | NewFD->setInvalidDecl(); |
| 3785 | |
| 3786 | // Set the lexical context. If the declarator has a C++ |
| 3787 | // scope specifier, or is the object of a friend declaration, the |
| 3788 | // lexical context will be different from the semantic context. |
| 3789 | NewFD->setLexicalDeclContext(CurContext); |
| 3790 | |
| 3791 | // Match up the template parameter lists with the scope specifier, then |
| 3792 | // determine whether we have a template or a template specialization. |
| 3793 | bool Invalid = false; |
| 3794 | if (TemplateParameterList *TemplateParams |
Douglas Gregor | cb710a4 | 2011-03-04 22:45:55 +0000 | [diff] [blame] | 3795 | = MatchTemplateParametersToScopeSpecifier( |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 3796 | D.getDeclSpec().getSourceRange().getBegin(), |
| 3797 | D.getCXXScopeSpec(), |
John McCall | 6102ca1 | 2010-10-16 06:59:13 +0000 | [diff] [blame] | 3798 | TemplateParamLists.get(), |
| 3799 | TemplateParamLists.size(), |
| 3800 | isFriend, |
| 3801 | isExplicitSpecialization, |
| 3802 | Invalid)) { |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3803 | // All but one template parameter lists have been matching. |
| 3804 | --NumMatchedTemplateParamLists; |
Abramo Bagnara | 9b93488 | 2010-06-12 08:15:14 +0000 | [diff] [blame] | 3805 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3806 | if (TemplateParams->size() > 0) { |
| 3807 | // This is a function template |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3808 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3809 | // Check that we can declare a template here. |
| 3810 | if (CheckTemplateDeclScope(S, TemplateParams)) |
| 3811 | return 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3812 | |
Douglas Gregor | cb710a4 | 2011-03-04 22:45:55 +0000 | [diff] [blame] | 3813 | // A destructor cannot be a template. |
| 3814 | if (Name.getNameKind() == DeclarationName::CXXDestructorName) { |
| 3815 | Diag(NewFD->getLocation(), diag::err_destructor_template); |
| 3816 | return 0; |
| 3817 | } |
| 3818 | |
| 3819 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3820 | FunctionTemplate = FunctionTemplateDecl::Create(Context, DC, |
Douglas Gregor | c5c903a | 2009-06-24 00:23:40 +0000 | [diff] [blame] | 3821 | NewFD->getLocation(), |
| 3822 | Name, TemplateParams, |
| 3823 | NewFD); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3824 | FunctionTemplate->setLexicalDeclContext(CurContext); |
| 3825 | NewFD->setDescribedFunctionTemplate(FunctionTemplate); |
| 3826 | } else { |
| 3827 | // This is a function template specialization. |
| 3828 | isFunctionTemplateSpecialization = true; |
John McCall | 7ad650f | 2010-03-24 07:46:06 +0000 | [diff] [blame] | 3829 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3830 | // C++0x [temp.expl.spec]p20 forbids "template<> friend void foo(int);". |
| 3831 | if (isFriend && isFunctionTemplateSpecialization) { |
| 3832 | // We want to remove the "template<>", found here. |
| 3833 | SourceRange RemoveRange = TemplateParams->getSourceRange(); |
John McCall | 5fd378b | 2010-03-24 08:27:58 +0000 | [diff] [blame] | 3834 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3835 | // If we remove the template<> and the name is not a |
| 3836 | // template-id, we're actually silently creating a problem: |
| 3837 | // the friend declaration will refer to an untemplated decl, |
| 3838 | // and clearly the user wants a template specialization. So |
| 3839 | // we need to insert '<>' after the name. |
| 3840 | SourceLocation InsertLoc; |
| 3841 | if (D.getName().getKind() != UnqualifiedId::IK_TemplateId) { |
| 3842 | InsertLoc = D.getName().getSourceRange().getEnd(); |
| 3843 | InsertLoc = PP.getLocForEndOfToken(InsertLoc); |
| 3844 | } |
| 3845 | |
| 3846 | Diag(D.getIdentifierLoc(), diag::err_template_spec_decl_friend) |
| 3847 | << Name << RemoveRange |
| 3848 | << FixItHint::CreateRemoval(RemoveRange) |
| 3849 | << FixItHint::CreateInsertion(InsertLoc, "<>"); |
| 3850 | } |
| 3851 | } |
John McCall | 5fd378b | 2010-03-24 08:27:58 +0000 | [diff] [blame] | 3852 | } |
| 3853 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3854 | if (NumMatchedTemplateParamLists > 0 && D.getCXXScopeSpec().isSet()) { |
| 3855 | NewFD->setTemplateParameterListsInfo(Context, |
| 3856 | NumMatchedTemplateParamLists, |
| 3857 | TemplateParamLists.release()); |
| 3858 | } |
| 3859 | |
| 3860 | if (Invalid) { |
| 3861 | NewFD->setInvalidDecl(); |
| 3862 | if (FunctionTemplate) |
| 3863 | FunctionTemplate->setInvalidDecl(); |
| 3864 | } |
| 3865 | |
| 3866 | // C++ [dcl.fct.spec]p5: |
| 3867 | // The virtual specifier shall only be used in declarations of |
| 3868 | // nonstatic class member functions that appear within a |
| 3869 | // member-specification of a class declaration; see 10.3. |
| 3870 | // |
| 3871 | if (isVirtual && !NewFD->isInvalidDecl()) { |
| 3872 | if (!isVirtualOkay) { |
| 3873 | Diag(D.getDeclSpec().getVirtualSpecLoc(), |
| 3874 | diag::err_virtual_non_function); |
| 3875 | } else if (!CurContext->isRecord()) { |
| 3876 | // 'virtual' was specified outside of the class. |
Anders Carlsson | f1602a5 | 2011-01-22 14:43:56 +0000 | [diff] [blame] | 3877 | Diag(D.getDeclSpec().getVirtualSpecLoc(), |
| 3878 | diag::err_virtual_out_of_class) |
| 3879 | << FixItHint::CreateRemoval(D.getDeclSpec().getVirtualSpecLoc()); |
| 3880 | } else if (NewFD->getDescribedFunctionTemplate()) { |
| 3881 | // C++ [temp.mem]p3: |
| 3882 | // A member function template shall not be virtual. |
| 3883 | Diag(D.getDeclSpec().getVirtualSpecLoc(), |
| 3884 | diag::err_virtual_member_function_template) |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3885 | << FixItHint::CreateRemoval(D.getDeclSpec().getVirtualSpecLoc()); |
| 3886 | } else { |
| 3887 | // Okay: Add virtual to the method. |
| 3888 | NewFD->setVirtualAsWritten(true); |
John McCall | 7ad650f | 2010-03-24 07:46:06 +0000 | [diff] [blame] | 3889 | } |
Douglas Gregor | c5c903a | 2009-06-24 00:23:40 +0000 | [diff] [blame] | 3890 | } |
Abramo Bagnara | 9b93488 | 2010-06-12 08:15:14 +0000 | [diff] [blame] | 3891 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3892 | // C++ [dcl.fct.spec]p3: |
| 3893 | // The inline specifier shall not appear on a block scope function declaration. |
| 3894 | if (isInline && !NewFD->isInvalidDecl()) { |
| 3895 | if (CurContext->isFunctionOrMethod()) { |
| 3896 | // 'inline' is not allowed on block scope function declaration. |
| 3897 | Diag(D.getDeclSpec().getInlineSpecLoc(), |
| 3898 | diag::err_inline_declaration_block_scope) << Name |
| 3899 | << FixItHint::CreateRemoval(D.getDeclSpec().getInlineSpecLoc()); |
| 3900 | } |
| 3901 | } |
| 3902 | |
| 3903 | // C++ [dcl.fct.spec]p6: |
| 3904 | // The explicit specifier shall be used only in the declaration of a |
| 3905 | // constructor or conversion function within its class definition; see 12.3.1 |
| 3906 | // and 12.3.2. |
| 3907 | if (isExplicit && !NewFD->isInvalidDecl()) { |
| 3908 | if (!CurContext->isRecord()) { |
| 3909 | // 'explicit' was specified outside of the class. |
| 3910 | Diag(D.getDeclSpec().getExplicitSpecLoc(), |
| 3911 | diag::err_explicit_out_of_class) |
| 3912 | << FixItHint::CreateRemoval(D.getDeclSpec().getExplicitSpecLoc()); |
| 3913 | } else if (!isa<CXXConstructorDecl>(NewFD) && |
| 3914 | !isa<CXXConversionDecl>(NewFD)) { |
| 3915 | // 'explicit' was specified on a function that wasn't a constructor |
| 3916 | // or conversion function. |
| 3917 | Diag(D.getDeclSpec().getExplicitSpecLoc(), |
| 3918 | diag::err_explicit_non_ctor_or_conv_function) |
| 3919 | << FixItHint::CreateRemoval(D.getDeclSpec().getExplicitSpecLoc()); |
| 3920 | } |
| 3921 | } |
Abramo Bagnara | 9b93488 | 2010-06-12 08:15:14 +0000 | [diff] [blame] | 3922 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3923 | // Filter out previous declarations that don't match the scope. |
Douglas Gregor | cc20945 | 2011-03-07 16:54:27 +0000 | [diff] [blame] | 3924 | FilterLookupForScope(*this, Previous, DC, S, NewFD->hasLinkage(), |
| 3925 | isExplicitSpecialization || |
| 3926 | isFunctionTemplateSpecialization); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3927 | |
| 3928 | if (isFriend) { |
| 3929 | // For now, claim that the objects have no previous declaration. |
| 3930 | if (FunctionTemplate) { |
| 3931 | FunctionTemplate->setObjectOfFriendDecl(false); |
| 3932 | FunctionTemplate->setAccess(AS_public); |
| 3933 | } |
| 3934 | NewFD->setObjectOfFriendDecl(false); |
| 3935 | NewFD->setAccess(AS_public); |
| 3936 | } |
| 3937 | |
John McCall | bfdcdc8 | 2010-12-15 04:00:32 +0000 | [diff] [blame] | 3938 | if (isa<CXXMethodDecl>(NewFD) && DC == CurContext && IsFunctionDefinition) { |
| 3939 | // A method is implicitly inline if it's defined in its class |
| 3940 | // definition. |
| 3941 | NewFD->setImplicitlyInline(); |
| 3942 | } |
| 3943 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 3944 | if (SC == SC_Static && isa<CXXMethodDecl>(NewFD) && |
| 3945 | !CurContext->isRecord()) { |
| 3946 | // C++ [class.static]p1: |
| 3947 | // A data or function member of a class may be declared static |
| 3948 | // in a class definition, in which case it is a static member of |
| 3949 | // the class. |
| 3950 | |
| 3951 | // Complain about the 'static' specifier if it's on an out-of-line |
| 3952 | // member function definition. |
| 3953 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), |
| 3954 | diag::err_static_out_of_line) |
| 3955 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); |
| 3956 | } |
Douglas Gregor | 0167f3c | 2010-07-14 23:14:12 +0000 | [diff] [blame] | 3957 | } |
| 3958 | |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3959 | // Handle GNU asm-label extension (encoded as an attribute). |
| 3960 | if (Expr *E = (Expr*) D.getAsmLabel()) { |
| 3961 | // The parser guarantees this is a string. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3962 | StringLiteral *SE = cast<StringLiteral>(E); |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 3963 | NewFD->addAttr(::new (Context) AsmLabelAttr(SE->getStrTokenLoc(0), Context, |
| 3964 | SE->getString())); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3965 | } |
| 3966 | |
Chris Lattner | 2dbd285 | 2009-04-25 06:12:16 +0000 | [diff] [blame] | 3967 | // Copy the parameter declarations from the declarator D to the function |
| 3968 | // declaration NewFD, if they are available. First scavenge them into Params. |
| 3969 | llvm::SmallVector<ParmVarDecl*, 16> Params; |
Abramo Bagnara | 723df24 | 2010-12-14 22:11:44 +0000 | [diff] [blame] | 3970 | if (D.isFunctionDeclarator()) { |
Abramo Bagnara | 075f8f1 | 2010-12-10 16:29:40 +0000 | [diff] [blame] | 3971 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo(); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3972 | |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3973 | // Check for C99 6.7.5.3p10 - foo(void) is a non-varargs |
| 3974 | // function that takes no arguments, not a function that takes a |
| 3975 | // single void argument. |
| 3976 | // We let through "const void" here because Sema::GetTypeForDeclarator |
| 3977 | // already checks for that case. |
| 3978 | if (FTI.NumArgs == 1 && !FTI.isVariadic && FTI.ArgInfo[0].Ident == 0 && |
| 3979 | FTI.ArgInfo[0].Param && |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 3980 | cast<ParmVarDecl>(FTI.ArgInfo[0].Param)->getType()->isVoidType()) { |
Chris Lattner | 2dbd285 | 2009-04-25 06:12:16 +0000 | [diff] [blame] | 3981 | // Empty arg list, don't push any params. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 3982 | ParmVarDecl *Param = cast<ParmVarDecl>(FTI.ArgInfo[0].Param); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3983 | |
| 3984 | // In C++, the empty parameter-type-list must be spelled "void"; a |
| 3985 | // typedef of void is not permitted. |
| 3986 | if (getLangOptions().CPlusPlus && |
Chris Lattner | 584be45 | 2009-04-25 05:44:12 +0000 | [diff] [blame] | 3987 | Param->getType().getUnqualifiedType() != Context.VoidTy) |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 3988 | Diag(Param->getLocation(), diag::err_param_typedef_of_void); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3989 | } else if (FTI.NumArgs > 0 && FTI.ArgInfo[0].Param != 0) { |
Argyrios Kyrtzidis | 9bedef6 | 2009-07-14 03:18:53 +0000 | [diff] [blame] | 3990 | for (unsigned i = 0, e = FTI.NumArgs; i != e; ++i) { |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 3991 | ParmVarDecl *Param = cast<ParmVarDecl>(FTI.ArgInfo[i].Param); |
Argyrios Kyrtzidis | 9bedef6 | 2009-07-14 03:18:53 +0000 | [diff] [blame] | 3992 | assert(Param->getDeclContext() != NewFD && "Was set before ?"); |
| 3993 | Param->setDeclContext(NewFD); |
| 3994 | Params.push_back(Param); |
John McCall | f19de1c | 2010-04-14 01:27:20 +0000 | [diff] [blame] | 3995 | |
| 3996 | if (Param->isInvalidDecl()) |
| 3997 | NewFD->setInvalidDecl(); |
Argyrios Kyrtzidis | 9bedef6 | 2009-07-14 03:18:53 +0000 | [diff] [blame] | 3998 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3999 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4000 | |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 4001 | } else if (const FunctionProtoType *FT = R->getAs<FunctionProtoType>()) { |
Chris Lattner | 1ad9b28 | 2009-04-25 06:03:53 +0000 | [diff] [blame] | 4002 | // 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] | 4003 | // following example, we'll need to synthesize (unnamed) |
| 4004 | // parameters for use in the declaration. |
| 4005 | // |
| 4006 | // @code |
| 4007 | // typedef void fn(int); |
| 4008 | // fn f; |
| 4009 | // @endcode |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4010 | |
Chris Lattner | 1ad9b28 | 2009-04-25 06:03:53 +0000 | [diff] [blame] | 4011 | // Synthesize a parameter for each argument type. |
Chris Lattner | 1ad9b28 | 2009-04-25 06:03:53 +0000 | [diff] [blame] | 4012 | for (FunctionProtoType::arg_type_iterator AI = FT->arg_type_begin(), |
| 4013 | AE = FT->arg_type_end(); AI != AE; ++AI) { |
John McCall | 82dc009 | 2010-06-04 11:21:44 +0000 | [diff] [blame] | 4014 | ParmVarDecl *Param = |
| 4015 | BuildParmVarDeclForTypedef(NewFD, D.getIdentifierLoc(), *AI); |
Chris Lattner | 1ad9b28 | 2009-04-25 06:03:53 +0000 | [diff] [blame] | 4016 | Params.push_back(Param); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4017 | } |
Chris Lattner | 84bb944 | 2009-04-25 18:38:18 +0000 | [diff] [blame] | 4018 | } else { |
| 4019 | assert(R->isFunctionNoProtoType() && NewFD->getNumParams() == 0 && |
| 4020 | "Should not need args for typedef of non-prototype fn"); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4021 | } |
Chris Lattner | 2dbd285 | 2009-04-25 06:12:16 +0000 | [diff] [blame] | 4022 | // Finally, we know we have the right number of parameters, install them. |
Douglas Gregor | 838db38 | 2010-02-11 01:19:42 +0000 | [diff] [blame] | 4023 | NewFD->setParams(Params.data(), Params.size()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4024 | |
Peter Collingbourne | c80e811 | 2011-01-21 02:08:54 +0000 | [diff] [blame] | 4025 | // Process the non-inheritable attributes on this declaration. |
| 4026 | ProcessDeclAttributes(S, NewFD, D, |
| 4027 | /*NonInheritable=*/true, /*Inheritable=*/false); |
| 4028 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4029 | if (!getLangOptions().CPlusPlus) { |
| 4030 | // Perform semantic checking on the function declaration. |
Fariborz Jahanian | 9913d6e | 2010-12-10 17:05:33 +0000 | [diff] [blame] | 4031 | bool isExplctSpecialization=false; |
| 4032 | CheckFunctionDeclaration(S, NewFD, Previous, isExplctSpecialization, |
Peter Collingbourne | c80e811 | 2011-01-21 02:08:54 +0000 | [diff] [blame] | 4033 | Redeclaration); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4034 | assert((NewFD->isInvalidDecl() || !Redeclaration || |
| 4035 | Previous.getResultKind() != LookupResult::FoundOverloaded) && |
| 4036 | "previous declaration set still overloaded"); |
| 4037 | } else { |
| 4038 | // If the declarator is a template-id, translate the parser's template |
| 4039 | // argument list into our AST format. |
| 4040 | bool HasExplicitTemplateArgs = false; |
| 4041 | TemplateArgumentListInfo TemplateArgs; |
| 4042 | if (D.getName().getKind() == UnqualifiedId::IK_TemplateId) { |
| 4043 | TemplateIdAnnotation *TemplateId = D.getName().TemplateId; |
| 4044 | TemplateArgs.setLAngleLoc(TemplateId->LAngleLoc); |
| 4045 | TemplateArgs.setRAngleLoc(TemplateId->RAngleLoc); |
| 4046 | ASTTemplateArgsPtr TemplateArgsPtr(*this, |
| 4047 | TemplateId->getTemplateArgs(), |
| 4048 | TemplateId->NumArgs); |
| 4049 | translateTemplateArguments(TemplateArgsPtr, |
| 4050 | TemplateArgs); |
| 4051 | TemplateArgsPtr.release(); |
Douglas Gregor | 0b60d9e | 2009-09-25 23:53:26 +0000 | [diff] [blame] | 4052 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4053 | HasExplicitTemplateArgs = true; |
Douglas Gregor | 0b60d9e | 2009-09-25 23:53:26 +0000 | [diff] [blame] | 4054 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4055 | if (FunctionTemplate) { |
Douglas Gregor | 5505c72 | 2011-01-24 18:54:39 +0000 | [diff] [blame] | 4056 | // Function template with explicit template arguments. |
| 4057 | Diag(D.getIdentifierLoc(), diag::err_function_template_partial_spec) |
| 4058 | << SourceRange(TemplateId->LAngleLoc, TemplateId->RAngleLoc); |
| 4059 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4060 | HasExplicitTemplateArgs = false; |
| 4061 | } else if (!isFunctionTemplateSpecialization && |
| 4062 | !D.getDeclSpec().isFriendSpecified()) { |
| 4063 | // We have encountered something that the user meant to be a |
| 4064 | // specialization (because it has explicitly-specified template |
| 4065 | // arguments) but that was not introduced with a "template<>" (or had |
| 4066 | // too few of them). |
| 4067 | Diag(D.getIdentifierLoc(), diag::err_template_spec_needs_header) |
| 4068 | << SourceRange(TemplateId->LAngleLoc, TemplateId->RAngleLoc) |
| 4069 | << FixItHint::CreateInsertion( |
| 4070 | D.getDeclSpec().getSourceRange().getBegin(), |
| 4071 | "template<> "); |
| 4072 | isFunctionTemplateSpecialization = true; |
John McCall | 29ae6e5 | 2010-10-13 05:45:15 +0000 | [diff] [blame] | 4073 | } else { |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4074 | // "friend void foo<>(int);" is an implicit specialization decl. |
| 4075 | isFunctionTemplateSpecialization = true; |
Francois Pichet | c71d8eb | 2010-10-01 21:19:28 +0000 | [diff] [blame] | 4076 | } |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4077 | } else if (isFriend && isFunctionTemplateSpecialization) { |
| 4078 | // This combination is only possible in a recovery case; the user |
| 4079 | // wrote something like: |
| 4080 | // template <> friend void foo(int); |
| 4081 | // which we're recovering from as if the user had written: |
| 4082 | // friend void foo<>(int); |
| 4083 | // Go ahead and fake up a template id. |
| 4084 | HasExplicitTemplateArgs = true; |
| 4085 | TemplateArgs.setLAngleLoc(D.getIdentifierLoc()); |
| 4086 | TemplateArgs.setRAngleLoc(D.getIdentifierLoc()); |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4087 | } |
John McCall | 29ae6e5 | 2010-10-13 05:45:15 +0000 | [diff] [blame] | 4088 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4089 | // If it's a friend (and only if it's a friend), it's possible |
| 4090 | // that either the specialized function type or the specialized |
| 4091 | // template is dependent, and therefore matching will fail. In |
| 4092 | // this case, don't check the specialization yet. |
| 4093 | if (isFunctionTemplateSpecialization && isFriend && |
| 4094 | (NewFD->getType()->isDependentType() || DC->isDependentContext())) { |
| 4095 | assert(HasExplicitTemplateArgs && |
| 4096 | "friend function specialization without template args"); |
| 4097 | if (CheckDependentFunctionTemplateSpecialization(NewFD, TemplateArgs, |
| 4098 | Previous)) |
| 4099 | NewFD->setInvalidDecl(); |
| 4100 | } else if (isFunctionTemplateSpecialization) { |
Daniel Dunbar | 975cc64 | 2011-03-09 23:24:34 +0000 | [diff] [blame] | 4101 | if (CheckFunctionTemplateSpecialization(NewFD, |
| 4102 | (HasExplicitTemplateArgs ? &TemplateArgs : 0), |
| 4103 | Previous)) |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4104 | NewFD->setInvalidDecl(); |
| 4105 | } else if (isExplicitSpecialization && isa<CXXMethodDecl>(NewFD)) { |
| 4106 | if (CheckMemberSpecialization(NewFD, Previous)) |
| 4107 | NewFD->setInvalidDecl(); |
| 4108 | } |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4109 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4110 | // Perform semantic checking on the function declaration. |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4111 | CheckFunctionDeclaration(S, NewFD, Previous, isExplicitSpecialization, |
Peter Collingbourne | c80e811 | 2011-01-21 02:08:54 +0000 | [diff] [blame] | 4112 | Redeclaration); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4113 | |
| 4114 | assert((NewFD->isInvalidDecl() || !Redeclaration || |
| 4115 | Previous.getResultKind() != LookupResult::FoundOverloaded) && |
| 4116 | "previous declaration set still overloaded"); |
| 4117 | |
| 4118 | NamedDecl *PrincipalDecl = (FunctionTemplate |
| 4119 | ? cast<NamedDecl>(FunctionTemplate) |
| 4120 | : NewFD); |
| 4121 | |
| 4122 | if (isFriend && Redeclaration) { |
| 4123 | AccessSpecifier Access = AS_public; |
| 4124 | if (!NewFD->isInvalidDecl()) |
| 4125 | Access = NewFD->getPreviousDeclaration()->getAccess(); |
| 4126 | |
| 4127 | NewFD->setAccess(Access); |
| 4128 | if (FunctionTemplate) FunctionTemplate->setAccess(Access); |
| 4129 | |
| 4130 | PrincipalDecl->setObjectOfFriendDecl(true); |
| 4131 | } |
| 4132 | |
| 4133 | if (NewFD->isOverloadedOperator() && !DC->isRecord() && |
| 4134 | PrincipalDecl->isInIdentifierNamespace(Decl::IDNS_Ordinary)) |
| 4135 | PrincipalDecl->setNonMemberOperator(); |
| 4136 | |
| 4137 | // If we have a function template, check the template parameter |
| 4138 | // list. This will check and merge default template arguments. |
| 4139 | if (FunctionTemplate) { |
| 4140 | FunctionTemplateDecl *PrevTemplate = FunctionTemplate->getPreviousDeclaration(); |
| 4141 | CheckTemplateParameterList(FunctionTemplate->getTemplateParameters(), |
| 4142 | PrevTemplate? PrevTemplate->getTemplateParameters() : 0, |
Douglas Gregor | d89d86f | 2011-02-04 04:20:44 +0000 | [diff] [blame] | 4143 | D.getDeclSpec().isFriendSpecified() |
| 4144 | ? (IsFunctionDefinition |
| 4145 | ? TPC_FriendFunctionTemplateDefinition |
| 4146 | : TPC_FriendFunctionTemplate) |
| 4147 | : (D.getCXXScopeSpec().isSet() && |
Douglas Gregor | 461bf2e | 2011-02-04 12:22:53 +0000 | [diff] [blame] | 4148 | DC && DC->isRecord() && |
| 4149 | DC->isDependentContext()) |
Douglas Gregor | d89d86f | 2011-02-04 04:20:44 +0000 | [diff] [blame] | 4150 | ? TPC_ClassTemplateMember |
| 4151 | : TPC_FunctionTemplate); |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4152 | } |
| 4153 | |
| 4154 | if (NewFD->isInvalidDecl()) { |
| 4155 | // Ignore all the rest of this. |
| 4156 | } else if (!Redeclaration) { |
| 4157 | // Fake up an access specifier if it's supposed to be a class member. |
| 4158 | if (isa<CXXRecordDecl>(NewFD->getDeclContext())) |
| 4159 | NewFD->setAccess(AS_public); |
| 4160 | |
| 4161 | // Qualified decls generally require a previous declaration. |
| 4162 | if (D.getCXXScopeSpec().isSet()) { |
| 4163 | // ...with the major exception of templated-scope or |
| 4164 | // dependent-scope friend declarations. |
| 4165 | |
| 4166 | // TODO: we currently also suppress this check in dependent |
| 4167 | // contexts because (1) the parameter depth will be off when |
| 4168 | // matching friend templates and (2) we might actually be |
| 4169 | // selecting a friend based on a dependent factor. But there |
| 4170 | // are situations where these conditions don't apply and we |
| 4171 | // can actually do this check immediately. |
| 4172 | if (isFriend && |
| 4173 | (NumMatchedTemplateParamLists || |
| 4174 | D.getCXXScopeSpec().getScopeRep()->isDependent() || |
| 4175 | CurContext->isDependentContext())) { |
| 4176 | // ignore these |
| 4177 | } else { |
| 4178 | // The user tried to provide an out-of-line definition for a |
| 4179 | // function that is a member of a class or namespace, but there |
| 4180 | // was no such member function declared (C++ [class.mfct]p2, |
| 4181 | // C++ [namespace.memdef]p2). For example: |
| 4182 | // |
| 4183 | // class X { |
| 4184 | // void f() const; |
| 4185 | // }; |
| 4186 | // |
| 4187 | // void X::f() { } // ill-formed |
| 4188 | // |
| 4189 | // Complain about this problem, and attempt to suggest close |
| 4190 | // matches (e.g., those that differ only in cv-qualifiers and |
| 4191 | // whether the parameter types are references). |
| 4192 | Diag(D.getIdentifierLoc(), diag::err_member_def_does_not_match) |
| 4193 | << Name << DC << D.getCXXScopeSpec().getRange(); |
| 4194 | NewFD->setInvalidDecl(); |
| 4195 | |
| 4196 | DiagnoseInvalidRedeclaration(*this, NewFD); |
| 4197 | } |
| 4198 | |
| 4199 | // Unqualified local friend declarations are required to resolve |
| 4200 | // to something. |
| 4201 | } else if (isFriend && cast<CXXRecordDecl>(CurContext)->isLocalClass()) { |
| 4202 | Diag(D.getIdentifierLoc(), diag::err_no_matching_local_friend); |
| 4203 | NewFD->setInvalidDecl(); |
| 4204 | DiagnoseInvalidRedeclaration(*this, NewFD); |
| 4205 | } |
| 4206 | |
| 4207 | } else if (!IsFunctionDefinition && D.getCXXScopeSpec().isSet() && |
| 4208 | !isFriend && !isFunctionTemplateSpecialization && |
| 4209 | !isExplicitSpecialization) { |
| 4210 | // An out-of-line member function declaration must also be a |
| 4211 | // definition (C++ [dcl.meaning]p1). |
| 4212 | // Note that this is not the case for explicit specializations of |
| 4213 | // function templates or member functions of class templates, per |
| 4214 | // C++ [temp.expl.spec]p2. We also allow these declarations as an extension |
| 4215 | // for compatibility with old SWIG code which likes to generate them. |
| 4216 | Diag(NewFD->getLocation(), diag::ext_out_of_line_declaration) |
| 4217 | << D.getCXXScopeSpec().getRange(); |
| 4218 | } |
| 4219 | } |
| 4220 | |
| 4221 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4222 | // Handle attributes. We need to have merged decls when handling attributes |
| 4223 | // (for example to check for conflicts, etc). |
| 4224 | // FIXME: This needs to happen before we merge declarations. Then, |
| 4225 | // let attribute merging cope with attribute conflicts. |
Peter Collingbourne | c80e811 | 2011-01-21 02:08:54 +0000 | [diff] [blame] | 4226 | ProcessDeclAttributes(S, NewFD, D, |
| 4227 | /*NonInheritable=*/false, /*Inheritable=*/true); |
Ryan Flynn | 478fbc6 | 2009-07-25 22:29:44 +0000 | [diff] [blame] | 4228 | |
| 4229 | // attributes declared post-definition are currently ignored |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 4230 | // FIXME: This should happen during attribute merging |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4231 | if (Redeclaration && Previous.isSingleResult()) { |
| 4232 | const FunctionDecl *Def; |
| 4233 | FunctionDecl *PrevFD = dyn_cast<FunctionDecl>(Previous.getFoundDecl()); |
Argyrios Kyrtzidis | 06a54a3 | 2010-07-07 11:31:19 +0000 | [diff] [blame] | 4234 | if (PrevFD && PrevFD->hasBody(Def) && D.hasAttributes()) { |
Ryan Flynn | 478fbc6 | 2009-07-25 22:29:44 +0000 | [diff] [blame] | 4235 | Diag(NewFD->getLocation(), diag::warn_attribute_precede_definition); |
| 4236 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 4237 | } |
| 4238 | } |
| 4239 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4240 | AddKnownFunctionAttributes(NewFD); |
| 4241 | |
Douglas Gregor | d945538 | 2010-08-06 13:50:58 +0000 | [diff] [blame] | 4242 | if (NewFD->hasAttr<OverloadableAttr>() && |
| 4243 | !NewFD->getType()->getAs<FunctionProtoType>()) { |
| 4244 | Diag(NewFD->getLocation(), |
| 4245 | diag::err_attribute_overloadable_no_prototype) |
| 4246 | << NewFD; |
| 4247 | |
| 4248 | // Turn this into a variadic function with no parameters. |
| 4249 | const FunctionType *FT = NewFD->getType()->getAs<FunctionType>(); |
John McCall | e23cf43 | 2010-12-14 08:05:40 +0000 | [diff] [blame] | 4250 | FunctionProtoType::ExtProtoInfo EPI; |
| 4251 | EPI.Variadic = true; |
| 4252 | EPI.ExtInfo = FT->getExtInfo(); |
| 4253 | |
| 4254 | QualType R = Context.getFunctionType(FT->getResultType(), 0, 0, EPI); |
Douglas Gregor | d945538 | 2010-08-06 13:50:58 +0000 | [diff] [blame] | 4255 | NewFD->setType(R); |
| 4256 | } |
| 4257 | |
Eli Friedman | aa8b0d1 | 2010-08-05 06:57:20 +0000 | [diff] [blame] | 4258 | // If there's a #pragma GCC visibility in scope, and this isn't a class |
| 4259 | // member, set the visibility of this function. |
| 4260 | if (NewFD->getLinkage() == ExternalLinkage && !DC->isRecord()) |
| 4261 | AddPushedVisibilityAttribute(NewFD); |
| 4262 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4263 | // If this is a locally-scoped extern C function, update the |
| 4264 | // map of such names. |
Douglas Gregor | 48a83b5 | 2009-09-12 00:17:51 +0000 | [diff] [blame] | 4265 | if (CurContext->isFunctionOrMethod() && NewFD->isExternC() |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 4266 | && !NewFD->isInvalidDecl()) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4267 | RegisterLocallyScopedExternCDecl(NewFD, Previous, S); |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4268 | |
Argyrios Kyrtzidis | 16f1930 | 2009-06-25 18:22:24 +0000 | [diff] [blame] | 4269 | // Set this FunctionDecl's range up to the right paren. |
Abramo Bagnara | a2026c9 | 2011-03-08 16:41:52 +0000 | [diff] [blame] | 4270 | NewFD->setRangeEnd(D.getSourceRange().getEnd()); |
Argyrios Kyrtzidis | 16f1930 | 2009-06-25 18:22:24 +0000 | [diff] [blame] | 4271 | |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4272 | if (getLangOptions().CPlusPlus) { |
| 4273 | if (FunctionTemplate) { |
| 4274 | if (NewFD->isInvalidDecl()) |
| 4275 | FunctionTemplate->setInvalidDecl(); |
| 4276 | return FunctionTemplate; |
| 4277 | } |
Fariborz Jahanian | bfe5788 | 2010-12-09 23:11:32 +0000 | [diff] [blame] | 4278 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4279 | |
Argyrios Kyrtzidis | bbc6454 | 2010-08-15 01:15:20 +0000 | [diff] [blame] | 4280 | MarkUnusedFileScopedDecl(NewFD); |
Peter Collingbourne | 14b6ba7 | 2011-02-09 21:04:32 +0000 | [diff] [blame] | 4281 | |
| 4282 | if (getLangOptions().CUDA) |
| 4283 | if (IdentifierInfo *II = NewFD->getIdentifier()) |
| 4284 | if (!NewFD->isInvalidDecl() && |
| 4285 | NewFD->getDeclContext()->getRedeclContext()->isTranslationUnit()) { |
| 4286 | if (II->isStr("cudaConfigureCall")) { |
| 4287 | if (!R->getAs<FunctionType>()->getResultType()->isScalarType()) |
| 4288 | Diag(NewFD->getLocation(), diag::err_config_scalar_return); |
| 4289 | |
| 4290 | Context.setcudaConfigureCallDecl(NewFD); |
| 4291 | } |
| 4292 | } |
| 4293 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4294 | return NewFD; |
| 4295 | } |
| 4296 | |
| 4297 | /// \brief Perform semantic checking of a new function declaration. |
| 4298 | /// |
| 4299 | /// Performs semantic analysis of the new function declaration |
| 4300 | /// NewFD. This routine performs all semantic checking that does not |
| 4301 | /// require the actual declarator involved in the declaration, and is |
| 4302 | /// used both for the declaration of functions as they are parsed |
| 4303 | /// (called via ActOnDeclarator) and for the declaration of functions |
| 4304 | /// that have been instantiated via C++ template instantiation (called |
| 4305 | /// via InstantiateDecl). |
| 4306 | /// |
Douglas Gregor | fd056bc | 2009-10-13 16:30:37 +0000 | [diff] [blame] | 4307 | /// \param IsExplicitSpecialiation whether this new function declaration is |
| 4308 | /// an explicit specialization of the previous declaration. |
| 4309 | /// |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 4310 | /// This sets NewFD->isInvalidDecl() to true if there was an error. |
John McCall | 9f54ad4 | 2009-12-10 09:41:52 +0000 | [diff] [blame] | 4311 | void Sema::CheckFunctionDeclaration(Scope *S, FunctionDecl *NewFD, |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4312 | LookupResult &Previous, |
Douglas Gregor | fd056bc | 2009-10-13 16:30:37 +0000 | [diff] [blame] | 4313 | bool IsExplicitSpecialization, |
Peter Collingbourne | c80e811 | 2011-01-21 02:08:54 +0000 | [diff] [blame] | 4314 | bool &Redeclaration) { |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 4315 | // 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] | 4316 | if (NewFD->isInvalidDecl()) { |
| 4317 | // If this is a class member, mark the class invalid immediately. |
| 4318 | // This avoids some consistency errors later. |
| 4319 | if (isa<CXXMethodDecl>(NewFD)) |
| 4320 | cast<CXXMethodDecl>(NewFD)->getParent()->setInvalidDecl(); |
| 4321 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 4322 | return; |
John McCall | fcadea2 | 2010-08-12 00:57:17 +0000 | [diff] [blame] | 4323 | } |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4324 | |
Eli Friedman | 88f7b57 | 2009-05-16 12:15:55 +0000 | [diff] [blame] | 4325 | if (NewFD->getResultType()->isVariablyModifiedType()) { |
| 4326 | // Functions returning a variably modified type violate C99 6.7.5.2p2 |
| 4327 | // because all functions have linkage. |
| 4328 | Diag(NewFD->getLocation(), diag::err_vm_func_decl); |
| 4329 | return NewFD->setInvalidDecl(); |
| 4330 | } |
| 4331 | |
Douglas Gregor | 48a83b5 | 2009-09-12 00:17:51 +0000 | [diff] [blame] | 4332 | if (NewFD->isMain()) |
| 4333 | CheckMain(NewFD); |
John McCall | 8c4859a | 2009-07-24 03:03:21 +0000 | [diff] [blame] | 4334 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4335 | // Check for a previous declaration of this name. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4336 | if (Previous.empty() && NewFD->isExternC()) { |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 4337 | // Since we did not find anything by this name and we're declaring |
| 4338 | // an extern "C" function, look for a non-visible extern "C" |
| 4339 | // declaration with the same name. |
| 4340 | llvm::DenseMap<DeclarationName, NamedDecl *>::iterator Pos |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4341 | = LocallyScopedExternalDecls.find(NewFD->getDeclName()); |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 4342 | if (Pos != LocallyScopedExternalDecls.end()) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4343 | Previous.addDecl(Pos->second); |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 4344 | } |
| 4345 | |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 4346 | // Merge or overload the declaration with an existing declaration of |
| 4347 | // the same name, if appropriate. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4348 | if (!Previous.empty()) { |
Douglas Gregor | f9201e0 | 2009-02-11 23:02:49 +0000 | [diff] [blame] | 4349 | // Determine whether NewFD is an overload of PrevDecl or |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4350 | // a declaration that requires merging. If it's an overload, |
| 4351 | // there's no more work to do here; we'll just add the new |
| 4352 | // function to the scope. |
Douglas Gregor | ae17094 | 2009-02-13 00:26:38 +0000 | [diff] [blame] | 4353 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4354 | NamedDecl *OldDecl = 0; |
John McCall | 871b2e7 | 2009-12-09 03:35:25 +0000 | [diff] [blame] | 4355 | if (!AllowOverloadingOfFunction(Previous, Context)) { |
| 4356 | Redeclaration = true; |
| 4357 | OldDecl = Previous.getFoundDecl(); |
| 4358 | } else { |
John McCall | ad00b77 | 2010-06-16 08:42:20 +0000 | [diff] [blame] | 4359 | switch (CheckOverload(S, NewFD, Previous, OldDecl, |
| 4360 | /*NewIsUsingDecl*/ false)) { |
John McCall | 871b2e7 | 2009-12-09 03:35:25 +0000 | [diff] [blame] | 4361 | case Ovl_Match: |
John McCall | 9f54ad4 | 2009-12-10 09:41:52 +0000 | [diff] [blame] | 4362 | Redeclaration = true; |
John McCall | 871b2e7 | 2009-12-09 03:35:25 +0000 | [diff] [blame] | 4363 | break; |
| 4364 | |
| 4365 | case Ovl_NonFunction: |
| 4366 | Redeclaration = true; |
| 4367 | break; |
| 4368 | |
| 4369 | case Ovl_Overload: |
| 4370 | Redeclaration = false; |
| 4371 | break; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4372 | } |
Peter Collingbourne | c80e811 | 2011-01-21 02:08:54 +0000 | [diff] [blame] | 4373 | |
| 4374 | if (!getLangOptions().CPlusPlus && !NewFD->hasAttr<OverloadableAttr>()) { |
| 4375 | // If a function name is overloadable in C, then every function |
| 4376 | // with that name must be marked "overloadable". |
| 4377 | Diag(NewFD->getLocation(), diag::err_attribute_overloadable_missing) |
| 4378 | << Redeclaration << NewFD; |
| 4379 | NamedDecl *OverloadedDecl = 0; |
| 4380 | if (Redeclaration) |
| 4381 | OverloadedDecl = OldDecl; |
| 4382 | else if (!Previous.empty()) |
| 4383 | OverloadedDecl = Previous.getRepresentativeDecl(); |
| 4384 | if (OverloadedDecl) |
| 4385 | Diag(OverloadedDecl->getLocation(), |
| 4386 | diag::note_attribute_overloadable_prev_overload); |
| 4387 | NewFD->addAttr(::new (Context) OverloadableAttr(SourceLocation(), |
| 4388 | Context)); |
| 4389 | } |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4390 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4391 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4392 | if (Redeclaration) { |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4393 | // NewFD and OldDecl represent declarations that need to be |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4394 | // merged. |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 4395 | if (MergeFunctionDecl(NewFD, OldDecl)) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 4396 | return NewFD->setInvalidDecl(); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4397 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4398 | Previous.clear(); |
| 4399 | Previous.addDecl(OldDecl); |
| 4400 | |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 4401 | if (FunctionTemplateDecl *OldTemplateDecl |
Douglas Gregor | 37d68185 | 2009-10-12 22:27:17 +0000 | [diff] [blame] | 4402 | = dyn_cast<FunctionTemplateDecl>(OldDecl)) { |
Douglas Gregor | fd056bc | 2009-10-13 16:30:37 +0000 | [diff] [blame] | 4403 | NewFD->setPreviousDeclaration(OldTemplateDecl->getTemplatedDecl()); |
Douglas Gregor | 37d68185 | 2009-10-12 22:27:17 +0000 | [diff] [blame] | 4404 | FunctionTemplateDecl *NewTemplateDecl |
| 4405 | = NewFD->getDescribedFunctionTemplate(); |
| 4406 | assert(NewTemplateDecl && "Template/non-template mismatch"); |
| 4407 | if (CXXMethodDecl *Method |
| 4408 | = dyn_cast<CXXMethodDecl>(NewTemplateDecl->getTemplatedDecl())) { |
| 4409 | Method->setAccess(OldTemplateDecl->getAccess()); |
| 4410 | NewTemplateDecl->setAccess(OldTemplateDecl->getAccess()); |
| 4411 | } |
Douglas Gregor | fd056bc | 2009-10-13 16:30:37 +0000 | [diff] [blame] | 4412 | |
| 4413 | // If this is an explicit specialization of a member that is a function |
| 4414 | // template, mark it as a member specialization. |
| 4415 | if (IsExplicitSpecialization && |
| 4416 | NewTemplateDecl->getInstantiatedFromMemberTemplate()) { |
| 4417 | NewTemplateDecl->setMemberSpecialization(); |
| 4418 | assert(OldTemplateDecl->isMemberSpecialization()); |
| 4419 | } |
Douglas Gregor | 37d68185 | 2009-10-12 22:27:17 +0000 | [diff] [blame] | 4420 | } else { |
Argyrios Kyrtzidis | 9bedef6 | 2009-07-14 03:18:53 +0000 | [diff] [blame] | 4421 | if (isa<CXXMethodDecl>(NewFD)) // Set access for out-of-line definitions |
| 4422 | NewFD->setAccess(OldDecl->getAccess()); |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 4423 | NewFD->setPreviousDeclaration(cast<FunctionDecl>(OldDecl)); |
Argyrios Kyrtzidis | 9bedef6 | 2009-07-14 03:18:53 +0000 | [diff] [blame] | 4424 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4425 | } |
Douglas Gregor | 4ce205f | 2009-02-06 17:46:57 +0000 | [diff] [blame] | 4426 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4427 | |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 4428 | // Semantic checking for this function declaration (in isolation). |
| 4429 | if (getLangOptions().CPlusPlus) { |
| 4430 | // C++-specific checks. |
| 4431 | if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(NewFD)) { |
| 4432 | CheckConstructor(Constructor); |
Anders Carlsson | 6d70139 | 2009-11-15 22:49:34 +0000 | [diff] [blame] | 4433 | } else if (CXXDestructorDecl *Destructor = |
| 4434 | dyn_cast<CXXDestructorDecl>(NewFD)) { |
| 4435 | CXXRecordDecl *Record = Destructor->getParent(); |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 4436 | QualType ClassType = Context.getTypeDeclType(Record); |
Anders Carlsson | 6d70139 | 2009-11-15 22:49:34 +0000 | [diff] [blame] | 4437 | |
Douglas Gregor | 4923aa2 | 2010-07-02 20:37:36 +0000 | [diff] [blame] | 4438 | // 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] | 4439 | // type is dependent? Both gcc and edg can handle that. |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 4440 | if (!ClassType->isDependentType()) { |
| 4441 | DeclarationName Name |
| 4442 | = Context.DeclarationNames.getCXXDestructorName( |
| 4443 | Context.getCanonicalType(ClassType)); |
| 4444 | if (NewFD->getDeclName() != Name) { |
| 4445 | Diag(NewFD->getLocation(), diag::err_destructor_name); |
| 4446 | return NewFD->setInvalidDecl(); |
| 4447 | } |
| 4448 | } |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 4449 | } else if (CXXConversionDecl *Conversion |
Douglas Gregor | 4ba3136 | 2009-12-01 17:24:26 +0000 | [diff] [blame] | 4450 | = dyn_cast<CXXConversionDecl>(NewFD)) { |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 4451 | ActOnConversionDeclarator(Conversion); |
Douglas Gregor | 4ba3136 | 2009-12-01 17:24:26 +0000 | [diff] [blame] | 4452 | } |
| 4453 | |
| 4454 | // Find any virtual functions that this function overrides. |
Douglas Gregor | e6342c0 | 2009-12-01 17:35:23 +0000 | [diff] [blame] | 4455 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(NewFD)) { |
| 4456 | if (!Method->isFunctionTemplateSpecialization() && |
Douglas Gregor | a6c1e3a | 2010-10-13 22:55:32 +0000 | [diff] [blame] | 4457 | !Method->getDescribedFunctionTemplate()) { |
| 4458 | if (AddOverriddenMethods(Method->getParent(), Method)) { |
| 4459 | // If the function was marked as "static", we have a problem. |
| 4460 | if (NewFD->getStorageClass() == SC_Static) { |
| 4461 | Diag(NewFD->getLocation(), diag::err_static_overrides_virtual) |
| 4462 | << NewFD->getDeclName(); |
| 4463 | for (CXXMethodDecl::method_iterator |
| 4464 | Overridden = Method->begin_overridden_methods(), |
| 4465 | OverriddenEnd = Method->end_overridden_methods(); |
| 4466 | Overridden != OverriddenEnd; |
| 4467 | ++Overridden) { |
| 4468 | Diag((*Overridden)->getLocation(), |
| 4469 | diag::note_overridden_virtual_function); |
| 4470 | } |
| 4471 | } |
Argyrios Kyrtzidis | 799ef66 | 2011-02-03 18:01:15 +0000 | [diff] [blame] | 4472 | } |
Douglas Gregor | a6c1e3a | 2010-10-13 22:55:32 +0000 | [diff] [blame] | 4473 | } |
Douglas Gregor | e6342c0 | 2009-12-01 17:35:23 +0000 | [diff] [blame] | 4474 | } |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 4475 | |
| 4476 | // Extra checking for C++ overloaded operators (C++ [over.oper]). |
| 4477 | if (NewFD->isOverloadedOperator() && |
| 4478 | CheckOverloadedOperatorDeclaration(NewFD)) |
| 4479 | return NewFD->setInvalidDecl(); |
Sean Hunt | a6c058d | 2010-01-13 09:01:02 +0000 | [diff] [blame] | 4480 | |
| 4481 | // Extra checking for C++0x literal operators (C++0x [over.literal]). |
| 4482 | if (NewFD->getLiteralIdentifier() && |
| 4483 | CheckLiteralOperatorDeclaration(NewFD)) |
| 4484 | return NewFD->setInvalidDecl(); |
| 4485 | |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 4486 | // In C++, check default arguments now that we have merged decls. Unless |
| 4487 | // the lexical context is the class, because in this case this is done |
| 4488 | // during delayed parsing anyway. |
| 4489 | if (!CurContext->isRecord()) |
| 4490 | CheckCXXDefaultArguments(NewFD); |
Douglas Gregor | b68e399 | 2010-12-21 19:47:46 +0000 | [diff] [blame] | 4491 | |
| 4492 | // If this function declares a builtin function, check the type of this |
| 4493 | // declaration against the expected type for the builtin. |
| 4494 | if (unsigned BuiltinID = NewFD->getBuiltinID()) { |
| 4495 | ASTContext::GetBuiltinTypeError Error; |
| 4496 | QualType T = Context.GetBuiltinType(BuiltinID, Error); |
| 4497 | if (!T.isNull() && !Context.hasSameType(T, NewFD->getType())) { |
| 4498 | // The type of this function differs from the type of the builtin, |
| 4499 | // so forget about the builtin entirely. |
| 4500 | Context.BuiltinInfo.ForgetBuiltin(BuiltinID, Context.Idents); |
| 4501 | } |
| 4502 | } |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 4503 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 4504 | } |
| 4505 | |
John McCall | 8c4859a | 2009-07-24 03:03:21 +0000 | [diff] [blame] | 4506 | void Sema::CheckMain(FunctionDecl* FD) { |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 4507 | // C++ [basic.start.main]p3: A program that declares main to be inline |
| 4508 | // or static is ill-formed. |
| 4509 | // C99 6.7.4p4: In a hosted environment, the inline function specifier |
| 4510 | // shall not appear in a declaration of main. |
| 4511 | // 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] | 4512 | bool isInline = FD->isInlineSpecified(); |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 4513 | bool isStatic = FD->getStorageClass() == SC_Static; |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 4514 | if (isInline || isStatic) { |
| 4515 | unsigned diagID = diag::warn_unusual_main_decl; |
| 4516 | if (isInline || getLangOptions().CPlusPlus) |
| 4517 | diagID = diag::err_unusual_main_decl; |
| 4518 | |
| 4519 | int which = isStatic + (isInline << 1) - 1; |
| 4520 | Diag(FD->getLocation(), diagID) << which; |
| 4521 | } |
| 4522 | |
| 4523 | QualType T = FD->getType(); |
| 4524 | assert(T->isFunctionType() && "function decl is not of function type"); |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 4525 | const FunctionType* FT = T->getAs<FunctionType>(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4526 | |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 4527 | if (!Context.hasSameUnqualifiedType(FT->getResultType(), Context.IntTy)) { |
Douglas Gregor | 5f39f70 | 2011-02-19 19:04:23 +0000 | [diff] [blame] | 4528 | Diag(FD->getTypeSpecStartLoc(), diag::err_main_returns_nonint); |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 4529 | FD->setInvalidDecl(true); |
| 4530 | } |
| 4531 | |
| 4532 | // Treat protoless main() as nullary. |
| 4533 | if (isa<FunctionNoProtoType>(FT)) return; |
| 4534 | |
| 4535 | const FunctionProtoType* FTP = cast<const FunctionProtoType>(FT); |
| 4536 | unsigned nparams = FTP->getNumArgs(); |
| 4537 | assert(FD->getNumParams() == nparams); |
| 4538 | |
John McCall | 6675586 | 2009-12-24 09:58:38 +0000 | [diff] [blame] | 4539 | bool HasExtraParameters = (nparams > 3); |
| 4540 | |
| 4541 | // Darwin passes an undocumented fourth argument of type char**. If |
| 4542 | // other platforms start sprouting these, the logic below will start |
| 4543 | // getting shifty. |
| 4544 | if (nparams == 4 && |
| 4545 | Context.Target.getTriple().getOS() == llvm::Triple::Darwin) |
| 4546 | HasExtraParameters = false; |
| 4547 | |
| 4548 | if (HasExtraParameters) { |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 4549 | Diag(FD->getLocation(), diag::err_main_surplus_args) << nparams; |
| 4550 | FD->setInvalidDecl(true); |
| 4551 | nparams = 3; |
| 4552 | } |
| 4553 | |
| 4554 | // FIXME: a lot of the following diagnostics would be improved |
| 4555 | // if we had some location information about types. |
| 4556 | |
| 4557 | QualType CharPP = |
| 4558 | Context.getPointerType(Context.getPointerType(Context.CharTy)); |
John McCall | 6675586 | 2009-12-24 09:58:38 +0000 | [diff] [blame] | 4559 | QualType Expected[] = { Context.IntTy, CharPP, CharPP, CharPP }; |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 4560 | |
| 4561 | for (unsigned i = 0; i < nparams; ++i) { |
| 4562 | QualType AT = FTP->getArgType(i); |
| 4563 | |
| 4564 | bool mismatch = true; |
| 4565 | |
| 4566 | if (Context.hasSameUnqualifiedType(AT, Expected[i])) |
| 4567 | mismatch = false; |
| 4568 | else if (Expected[i] == CharPP) { |
| 4569 | // As an extension, the following forms are okay: |
| 4570 | // char const ** |
| 4571 | // char const * const * |
| 4572 | // char * const * |
| 4573 | |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 4574 | QualifierCollector qs; |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 4575 | const PointerType* PT; |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 4576 | if ((PT = qs.strip(AT)->getAs<PointerType>()) && |
| 4577 | (PT = qs.strip(PT->getPointeeType())->getAs<PointerType>()) && |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 4578 | (QualType(qs.strip(PT->getPointeeType()), 0) == Context.CharTy)) { |
| 4579 | qs.removeConst(); |
| 4580 | mismatch = !qs.empty(); |
| 4581 | } |
| 4582 | } |
| 4583 | |
| 4584 | if (mismatch) { |
| 4585 | Diag(FD->getLocation(), diag::err_main_arg_wrong) << i << Expected[i]; |
| 4586 | // TODO: suggest replacing given type with expected type |
| 4587 | FD->setInvalidDecl(true); |
| 4588 | } |
| 4589 | } |
| 4590 | |
| 4591 | if (nparams == 1 && !FD->isInvalidDecl()) { |
| 4592 | Diag(FD->getLocation(), diag::warn_main_one_arg); |
| 4593 | } |
Douglas Gregor | 0bab54c | 2010-10-21 16:57:46 +0000 | [diff] [blame] | 4594 | |
| 4595 | if (!FD->isInvalidDecl() && FD->getDescribedFunctionTemplate()) { |
| 4596 | Diag(FD->getLocation(), diag::err_main_template_decl); |
| 4597 | FD->setInvalidDecl(); |
| 4598 | } |
John McCall | 8c4859a | 2009-07-24 03:03:21 +0000 | [diff] [blame] | 4599 | } |
| 4600 | |
Eli Friedman | c594b32 | 2008-05-20 13:48:25 +0000 | [diff] [blame] | 4601 | bool Sema::CheckForConstantInitializer(Expr *Init, QualType DclT) { |
Eli Friedman | 3b8a36a | 2009-02-27 04:17:12 +0000 | [diff] [blame] | 4602 | // FIXME: Need strict checking. In C89, we need to check for |
| 4603 | // any assignment, increment, decrement, function-calls, or |
| 4604 | // commas outside of a sizeof. In C99, it's the same list, |
| 4605 | // except that the aforementioned are allowed in unevaluated |
| 4606 | // expressions. Everything else falls under the |
| 4607 | // "may accept other forms of constant expressions" exception. |
| 4608 | // (We never end up here for C++, so the constant expression |
| 4609 | // rules there don't matter.) |
John McCall | 4204f07 | 2010-08-02 21:13:48 +0000 | [diff] [blame] | 4610 | if (Init->isConstantInitializer(Context, false)) |
Eli Friedman | 578a972 | 2009-02-22 06:45:27 +0000 | [diff] [blame] | 4611 | return false; |
Eli Friedman | 2129828 | 2009-02-26 04:47:58 +0000 | [diff] [blame] | 4612 | Diag(Init->getExprLoc(), diag::err_init_element_not_constant) |
| 4613 | << Init->getSourceRange(); |
Eli Friedman | c594b32 | 2008-05-20 13:48:25 +0000 | [diff] [blame] | 4614 | return true; |
Steve Naroff | d0091aa | 2008-01-10 22:15:12 +0000 | [diff] [blame] | 4615 | } |
| 4616 | |
Douglas Gregor | 09f41cf | 2009-01-14 15:45:31 +0000 | [diff] [blame] | 4617 | /// AddInitializerToDecl - Adds the initializer Init to the |
| 4618 | /// declaration dcl. If DirectInit is true, this is C++ direct |
| 4619 | /// initialization rather than copy initialization. |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 4620 | void Sema::AddInitializerToDecl(Decl *RealDecl, Expr *Init, |
| 4621 | bool DirectInit, bool TypeMayContainAuto) { |
Chris Lattner | 9a11b9a | 2007-10-19 20:10:30 +0000 | [diff] [blame] | 4622 | // If there is no declaration, there was an error parsing it. Just ignore |
| 4623 | // the initializer. |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 4624 | if (RealDecl == 0 || RealDecl->isInvalidDecl()) |
Chris Lattner | 9a11b9a | 2007-10-19 20:10:30 +0000 | [diff] [blame] | 4625 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4626 | |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 4627 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(RealDecl)) { |
| 4628 | // With declarators parsed the way they are, the parser cannot |
| 4629 | // distinguish between a normal initializer and a pure-specifier. |
| 4630 | // Thus this grotesque test. |
| 4631 | IntegerLiteral *IL; |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 4632 | if ((IL = dyn_cast<IntegerLiteral>(Init)) && IL->getValue() == 0 && |
Douglas Gregor | 4ba3136 | 2009-12-01 17:24:26 +0000 | [diff] [blame] | 4633 | Context.getCanonicalType(IL->getType()) == Context.IntTy) |
| 4634 | CheckPureMethod(Method, Init->getSourceRange()); |
| 4635 | else { |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 4636 | Diag(Method->getLocation(), diag::err_member_function_initialization) |
| 4637 | << Method->getDeclName() << Init->getSourceRange(); |
| 4638 | Method->setInvalidDecl(); |
| 4639 | } |
| 4640 | return; |
| 4641 | } |
| 4642 | |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 4643 | VarDecl *VDecl = dyn_cast<VarDecl>(RealDecl); |
| 4644 | if (!VDecl) { |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 4645 | if (getLangOptions().CPlusPlus && |
| 4646 | RealDecl->getLexicalDeclContext()->isRecord() && |
| 4647 | isa<NamedDecl>(RealDecl)) |
John McCall | 4e63564 | 2010-09-10 23:21:22 +0000 | [diff] [blame] | 4648 | Diag(RealDecl->getLocation(), diag::err_member_initialization); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 4649 | else |
| 4650 | Diag(RealDecl->getLocation(), diag::err_illegal_initializer); |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 4651 | RealDecl->setInvalidDecl(); |
| 4652 | return; |
Eli Friedman | 3b8a36a | 2009-02-27 04:17:12 +0000 | [diff] [blame] | 4653 | } |
| 4654 | |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 4655 | // C++0x [decl.spec.auto]p6. Deduce the type which 'auto' stands in for. |
| 4656 | if (TypeMayContainAuto && VDecl->getType()->getContainedAutoType()) { |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 4657 | QualType DeducedType; |
| 4658 | if (!DeduceAutoType(VDecl->getType(), Init, DeducedType)) { |
| 4659 | Diag(VDecl->getLocation(), diag::err_auto_var_deduction_failure) |
| 4660 | << VDecl->getDeclName() << VDecl->getType() << Init->getType() |
| 4661 | << Init->getSourceRange(); |
| 4662 | RealDecl->setInvalidDecl(); |
| 4663 | return; |
| 4664 | } |
| 4665 | VDecl->setType(DeducedType); |
| 4666 | |
| 4667 | // If this is a redeclaration, check that the type we just deduced matches |
| 4668 | // the previously declared type. |
| 4669 | if (VarDecl *Old = VDecl->getPreviousDeclaration()) |
| 4670 | MergeVarDeclTypes(VDecl, Old); |
| 4671 | } |
Douglas Gregor | 3a91abf | 2010-08-24 05:27:49 +0000 | [diff] [blame] | 4672 | |
| 4673 | |
Eli Friedman | 49e2b8e | 2009-11-14 03:40:14 +0000 | [diff] [blame] | 4674 | // A definition must end up with a complete type, which means it must be |
| 4675 | // complete with the restriction that an array type might be completed by the |
| 4676 | // initializer; note that later code assumes this restriction. |
| 4677 | QualType BaseDeclType = VDecl->getType(); |
| 4678 | if (const ArrayType *Array = Context.getAsIncompleteArrayType(BaseDeclType)) |
| 4679 | BaseDeclType = Array->getElementType(); |
| 4680 | if (RequireCompleteType(VDecl->getLocation(), BaseDeclType, |
Eli Friedman | a31feca | 2009-04-13 21:28:54 +0000 | [diff] [blame] | 4681 | diag::err_typecheck_decl_incomplete_type)) { |
| 4682 | RealDecl->setInvalidDecl(); |
| 4683 | return; |
| 4684 | } |
| 4685 | |
Douglas Gregor | 1ab537b | 2009-12-03 18:33:45 +0000 | [diff] [blame] | 4686 | // The variable can not have an abstract class type. |
| 4687 | if (RequireNonAbstractType(VDecl->getLocation(), VDecl->getType(), |
| 4688 | diag::err_abstract_type_in_decl, |
| 4689 | AbstractVariableType)) |
| 4690 | VDecl->setInvalidDecl(); |
| 4691 | |
Sebastian Redl | 31310a2 | 2010-02-01 20:16:42 +0000 | [diff] [blame] | 4692 | const VarDecl *Def; |
| 4693 | if ((Def = VDecl->getDefinition()) && Def != VDecl) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4694 | Diag(VDecl->getLocation(), diag::err_redefinition) |
Douglas Gregor | 275a369 | 2009-03-10 23:43:53 +0000 | [diff] [blame] | 4695 | << VDecl->getDeclName(); |
| 4696 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 4697 | VDecl->setInvalidDecl(); |
| 4698 | return; |
| 4699 | } |
Douglas Gregor | 3a91abf | 2010-08-24 05:27:49 +0000 | [diff] [blame] | 4700 | |
Douglas Gregor | 3a91abf | 2010-08-24 05:27:49 +0000 | [diff] [blame] | 4701 | const VarDecl* PrevInit = 0; |
Douglas Gregor | a31040f | 2010-12-16 01:31:22 +0000 | [diff] [blame] | 4702 | if (getLangOptions().CPlusPlus) { |
| 4703 | // C++ [class.static.data]p4 |
| 4704 | // If a static data member is of const integral or const |
| 4705 | // enumeration type, its declaration in the class definition can |
| 4706 | // specify a constant-initializer which shall be an integral |
| 4707 | // constant expression (5.19). In that case, the member can appear |
| 4708 | // in integral constant expressions. The member shall still be |
| 4709 | // defined in a namespace scope if it is used in the program and the |
| 4710 | // namespace scope definition shall not contain an initializer. |
| 4711 | // |
| 4712 | // We already performed a redefinition check above, but for static |
| 4713 | // data members we also need to check whether there was an in-class |
| 4714 | // declaration with an initializer. |
| 4715 | if (VDecl->isStaticDataMember() && VDecl->getAnyInitializer(PrevInit)) { |
| 4716 | Diag(VDecl->getLocation(), diag::err_redefinition) << VDecl->getDeclName(); |
| 4717 | Diag(PrevInit->getLocation(), diag::note_previous_definition); |
| 4718 | return; |
| 4719 | } |
Douglas Gregor | 275a369 | 2009-03-10 23:43:53 +0000 | [diff] [blame] | 4720 | |
Douglas Gregor | a31040f | 2010-12-16 01:31:22 +0000 | [diff] [blame] | 4721 | if (VDecl->hasLocalStorage()) |
| 4722 | getCurFunction()->setHasBranchProtectedScope(); |
| 4723 | |
| 4724 | if (DiagnoseUnexpandedParameterPack(Init, UPPC_Initializer)) { |
| 4725 | VDecl->setInvalidDecl(); |
| 4726 | return; |
| 4727 | } |
| 4728 | } |
John McCall | e46f62c | 2010-08-01 01:24:59 +0000 | [diff] [blame] | 4729 | |
Douglas Gregor | 99a2e60 | 2009-12-16 01:38:02 +0000 | [diff] [blame] | 4730 | // Capture the variable that is being initialized and the style of |
| 4731 | // initialization. |
| 4732 | InitializedEntity Entity = InitializedEntity::InitializeVariable(VDecl); |
| 4733 | |
| 4734 | // FIXME: Poor source location information. |
| 4735 | InitializationKind Kind |
| 4736 | = DirectInit? InitializationKind::CreateDirect(VDecl->getLocation(), |
| 4737 | Init->getLocStart(), |
| 4738 | Init->getLocEnd()) |
| 4739 | : InitializationKind::CreateCopy(VDecl->getLocation(), |
| 4740 | Init->getLocStart()); |
| 4741 | |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 4742 | // Get the decls type and save a reference for later, since |
Steve Naroff | d0091aa | 2008-01-10 22:15:12 +0000 | [diff] [blame] | 4743 | // CheckInitializerTypes may change it. |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 4744 | QualType DclT = VDecl->getType(), SavT = DclT; |
John McCall | b6bbcc9 | 2010-10-15 04:57:14 +0000 | [diff] [blame] | 4745 | if (VDecl->isLocalVarDecl()) { |
Daniel Dunbar | 5466c7b | 2009-04-14 02:25:56 +0000 | [diff] [blame] | 4746 | if (VDecl->hasExternalStorage()) { // C99 6.7.8p5 |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 4747 | Diag(VDecl->getLocation(), diag::err_block_extern_cant_init); |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 4748 | VDecl->setInvalidDecl(); |
| 4749 | } else if (!VDecl->isInvalidDecl()) { |
Eli Friedman | cfdc81a | 2009-12-19 08:11:05 +0000 | [diff] [blame] | 4750 | InitializationSequence InitSeq(*this, Entity, Kind, &Init, 1); |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 4751 | ExprResult Result = InitSeq.Perform(*this, Entity, Kind, |
John McCall | ca0408f | 2010-08-23 06:44:23 +0000 | [diff] [blame] | 4752 | MultiExprArg(*this, &Init, 1), |
Eli Friedman | a91eb54 | 2009-12-22 02:10:53 +0000 | [diff] [blame] | 4753 | &DclT); |
| 4754 | if (Result.isInvalid()) { |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 4755 | VDecl->setInvalidDecl(); |
Eli Friedman | cfdc81a | 2009-12-19 08:11:05 +0000 | [diff] [blame] | 4756 | return; |
| 4757 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4758 | |
Eli Friedman | a91eb54 | 2009-12-22 02:10:53 +0000 | [diff] [blame] | 4759 | Init = Result.takeAs<Expr>(); |
| 4760 | |
Anders Carlsson | c5eb731 | 2008-08-22 05:00:02 +0000 | [diff] [blame] | 4761 | // C++ 3.6.2p2, allow dynamic initialization of static initializers. |
Eli Friedman | da15323 | 2009-02-20 01:34:21 +0000 | [diff] [blame] | 4762 | // Don't check invalid declarations to avoid emitting useless diagnostics. |
| 4763 | if (!getLangOptions().CPlusPlus && !VDecl->isInvalidDecl()) { |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 4764 | if (VDecl->getStorageClass() == SC_Static) // C99 6.7.8p4. |
Anders Carlsson | c5eb731 | 2008-08-22 05:00:02 +0000 | [diff] [blame] | 4765 | CheckForConstantInitializer(Init, DclT); |
| 4766 | } |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 4767 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4768 | } else if (VDecl->isStaticDataMember() && |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 4769 | VDecl->getLexicalDeclContext()->isRecord()) { |
| 4770 | // This is an in-class initialization for a static data member, e.g., |
| 4771 | // |
| 4772 | // struct S { |
| 4773 | // static const int value = 17; |
| 4774 | // }; |
| 4775 | |
John McCall | 4e63564 | 2010-09-10 23:21:22 +0000 | [diff] [blame] | 4776 | // Try to perform the initialization regardless. |
| 4777 | if (!VDecl->isInvalidDecl()) { |
| 4778 | InitializationSequence InitSeq(*this, Entity, Kind, &Init, 1); |
| 4779 | ExprResult Result = InitSeq.Perform(*this, Entity, Kind, |
| 4780 | MultiExprArg(*this, &Init, 1), |
| 4781 | &DclT); |
| 4782 | if (Result.isInvalid()) { |
| 4783 | VDecl->setInvalidDecl(); |
| 4784 | return; |
| 4785 | } |
| 4786 | |
| 4787 | Init = Result.takeAs<Expr>(); |
| 4788 | } |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 4789 | |
| 4790 | // C++ [class.mem]p4: |
| 4791 | // A member-declarator can contain a constant-initializer only |
| 4792 | // if it declares a static member (9.4) of const integral or |
| 4793 | // const enumeration type, see 9.4.2. |
| 4794 | QualType T = VDecl->getType(); |
John McCall | 4e63564 | 2010-09-10 23:21:22 +0000 | [diff] [blame] | 4795 | |
| 4796 | // Do nothing on dependent types. |
| 4797 | if (T->isDependentType()) { |
| 4798 | |
| 4799 | // Require constness. |
| 4800 | } else if (!T.isConstQualified()) { |
| 4801 | Diag(VDecl->getLocation(), diag::err_in_class_initializer_non_const) |
| 4802 | << Init->getSourceRange(); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 4803 | VDecl->setInvalidDecl(); |
John McCall | 4e63564 | 2010-09-10 23:21:22 +0000 | [diff] [blame] | 4804 | |
| 4805 | // We allow integer constant expressions in all cases. |
| 4806 | } else if (T->isIntegralOrEnumerationType()) { |
| 4807 | if (!Init->isValueDependent()) { |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 4808 | // Check whether the expression is a constant expression. |
| 4809 | llvm::APSInt Value; |
| 4810 | SourceLocation Loc; |
| 4811 | if (!Init->isIntegerConstantExpr(Value, Context, &Loc)) { |
| 4812 | Diag(Loc, diag::err_in_class_initializer_non_constant) |
| 4813 | << Init->getSourceRange(); |
| 4814 | VDecl->setInvalidDecl(); |
John McCall | 4e63564 | 2010-09-10 23:21:22 +0000 | [diff] [blame] | 4815 | } |
| 4816 | } |
| 4817 | |
| 4818 | // We allow floating-point constants as an extension in C++03, and |
| 4819 | // C++0x has far more complicated rules that we don't really |
| 4820 | // implement fully. |
| 4821 | } else { |
| 4822 | bool Allowed = false; |
| 4823 | if (getLangOptions().CPlusPlus0x) { |
| 4824 | Allowed = T->isLiteralType(); |
| 4825 | } else if (T->isFloatingType()) { // also permits complex, which is ok |
| 4826 | Diag(VDecl->getLocation(), diag::ext_in_class_initializer_float_type) |
| 4827 | << T << Init->getSourceRange(); |
| 4828 | Allowed = true; |
| 4829 | } |
| 4830 | |
| 4831 | if (!Allowed) { |
| 4832 | Diag(VDecl->getLocation(), diag::err_in_class_initializer_bad_type) |
| 4833 | << T << Init->getSourceRange(); |
| 4834 | VDecl->setInvalidDecl(); |
| 4835 | |
| 4836 | // TODO: there are probably expressions that pass here that shouldn't. |
| 4837 | } else if (!Init->isValueDependent() && |
| 4838 | !Init->isConstantInitializer(Context, false)) { |
| 4839 | Diag(Init->getExprLoc(), diag::err_in_class_initializer_non_constant) |
| 4840 | << Init->getSourceRange(); |
| 4841 | VDecl->setInvalidDecl(); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 4842 | } |
| 4843 | } |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 4844 | } else if (VDecl->isFileVarDecl()) { |
Douglas Gregor | 66c42d4 | 2010-10-15 01:21:46 +0000 | [diff] [blame] | 4845 | if (VDecl->getStorageClassAsWritten() == SC_Extern && |
Douglas Gregor | 66dd939 | 2010-04-22 14:36:26 +0000 | [diff] [blame] | 4846 | (!getLangOptions().CPlusPlus || |
| 4847 | !Context.getBaseElementType(VDecl->getType()).isConstQualified())) |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 4848 | Diag(VDecl->getLocation(), diag::warn_extern_init); |
Eli Friedman | a91eb54 | 2009-12-22 02:10:53 +0000 | [diff] [blame] | 4849 | if (!VDecl->isInvalidDecl()) { |
| 4850 | InitializationSequence InitSeq(*this, Entity, Kind, &Init, 1); |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 4851 | ExprResult Result = InitSeq.Perform(*this, Entity, Kind, |
John McCall | ca0408f | 2010-08-23 06:44:23 +0000 | [diff] [blame] | 4852 | MultiExprArg(*this, &Init, 1), |
Eli Friedman | a91eb54 | 2009-12-22 02:10:53 +0000 | [diff] [blame] | 4853 | &DclT); |
| 4854 | if (Result.isInvalid()) { |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 4855 | VDecl->setInvalidDecl(); |
Eli Friedman | a91eb54 | 2009-12-22 02:10:53 +0000 | [diff] [blame] | 4856 | return; |
| 4857 | } |
| 4858 | |
| 4859 | Init = Result.takeAs<Expr>(); |
| 4860 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4861 | |
Anders Carlsson | c5eb731 | 2008-08-22 05:00:02 +0000 | [diff] [blame] | 4862 | // C++ 3.6.2p2, allow dynamic initialization of static initializers. |
Eli Friedman | da15323 | 2009-02-20 01:34:21 +0000 | [diff] [blame] | 4863 | // Don't check invalid declarations to avoid emitting useless diagnostics. |
| 4864 | if (!getLangOptions().CPlusPlus && !VDecl->isInvalidDecl()) { |
Anders Carlsson | c5eb731 | 2008-08-22 05:00:02 +0000 | [diff] [blame] | 4865 | // C99 6.7.8p4. All file scoped initializers need to be constant. |
| 4866 | CheckForConstantInitializer(Init, DclT); |
| 4867 | } |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 4868 | } |
| 4869 | // 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] | 4870 | // completed by the initializer. For example: |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 4871 | // int ary[] = { 1, 3, 5 }; |
| 4872 | // "ary" transitions from a VariableArrayType to a ConstantArrayType. |
Christopher Lamb | 48b1239 | 2007-11-29 19:09:19 +0000 | [diff] [blame] | 4873 | if (!VDecl->isInvalidDecl() && (DclT != SavT)) { |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 4874 | VDecl->setType(DclT); |
Christopher Lamb | 48b1239 | 2007-11-29 19:09:19 +0000 | [diff] [blame] | 4875 | Init->setType(DclT); |
| 4876 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4877 | |
Chris Lattner | 16c5dea | 2010-10-10 18:16:20 +0000 | [diff] [blame] | 4878 | |
| 4879 | // If this variable is a local declaration with record type, make sure it |
| 4880 | // doesn't have a flexible member initialization. We only support this as a |
| 4881 | // global/static definition. |
| 4882 | if (VDecl->hasLocalStorage()) |
| 4883 | if (const RecordType *RT = VDecl->getType()->getAs<RecordType>()) |
Douglas Gregor | c6eddf5 | 2010-10-15 23:53:28 +0000 | [diff] [blame] | 4884 | if (RT->getDecl()->hasFlexibleArrayMember()) { |
| 4885 | // Check whether the initializer tries to initialize the flexible |
| 4886 | // array member itself to anything other than an empty initializer list. |
| 4887 | if (InitListExpr *ILE = dyn_cast<InitListExpr>(Init)) { |
| 4888 | unsigned Index = std::distance(RT->getDecl()->field_begin(), |
| 4889 | RT->getDecl()->field_end()) - 1; |
| 4890 | if (Index < ILE->getNumInits() && |
| 4891 | !(isa<InitListExpr>(ILE->getInit(Index)) && |
| 4892 | cast<InitListExpr>(ILE->getInit(Index))->getNumInits() == 0)) { |
| 4893 | Diag(VDecl->getLocation(), diag::err_nonstatic_flexible_variable); |
| 4894 | VDecl->setInvalidDecl(); |
| 4895 | } |
| 4896 | } |
Chris Lattner | 16c5dea | 2010-10-10 18:16:20 +0000 | [diff] [blame] | 4897 | } |
| 4898 | |
John McCall | b4eb64d | 2010-10-08 02:01:28 +0000 | [diff] [blame] | 4899 | // Check any implicit conversions within the expression. |
| 4900 | CheckImplicitConversions(Init, VDecl->getLocation()); |
| 4901 | |
John McCall | 4765fa0 | 2010-12-06 08:20:24 +0000 | [diff] [blame] | 4902 | Init = MaybeCreateExprWithCleanups(Init); |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 4903 | // Attach the initializer to the decl. |
Douglas Gregor | 838db38 | 2010-02-11 01:19:42 +0000 | [diff] [blame] | 4904 | VDecl->setInit(Init); |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 4905 | |
John McCall | 2998d6b | 2011-01-19 11:48:09 +0000 | [diff] [blame] | 4906 | CheckCompleteVariableDeclaration(VDecl); |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 4907 | } |
| 4908 | |
John McCall | 7727acf | 2010-03-31 02:13:20 +0000 | [diff] [blame] | 4909 | /// ActOnInitializerError - Given that there was an error parsing an |
| 4910 | /// initializer for the given declaration, try to return to some form |
| 4911 | /// of sanity. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 4912 | void Sema::ActOnInitializerError(Decl *D) { |
John McCall | 7727acf | 2010-03-31 02:13:20 +0000 | [diff] [blame] | 4913 | // Our main concern here is re-establishing invariants like "a |
| 4914 | // variable's type is either dependent or complete". |
John McCall | 7727acf | 2010-03-31 02:13:20 +0000 | [diff] [blame] | 4915 | if (!D || D->isInvalidDecl()) return; |
| 4916 | |
| 4917 | VarDecl *VD = dyn_cast<VarDecl>(D); |
| 4918 | if (!VD) return; |
| 4919 | |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 4920 | // 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] | 4921 | if (ParsingInitForAutoVars.count(D)) { |
| 4922 | D->setInvalidDecl(); |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 4923 | return; |
| 4924 | } |
| 4925 | |
John McCall | 7727acf | 2010-03-31 02:13:20 +0000 | [diff] [blame] | 4926 | QualType Ty = VD->getType(); |
| 4927 | if (Ty->isDependentType()) return; |
| 4928 | |
| 4929 | // Require a complete type. |
| 4930 | if (RequireCompleteType(VD->getLocation(), |
| 4931 | Context.getBaseElementType(Ty), |
| 4932 | diag::err_typecheck_decl_incomplete_type)) { |
| 4933 | VD->setInvalidDecl(); |
| 4934 | return; |
| 4935 | } |
| 4936 | |
| 4937 | // Require an abstract type. |
| 4938 | if (RequireNonAbstractType(VD->getLocation(), Ty, |
| 4939 | diag::err_abstract_type_in_decl, |
| 4940 | AbstractVariableType)) { |
| 4941 | VD->setInvalidDecl(); |
| 4942 | return; |
| 4943 | } |
| 4944 | |
| 4945 | // Don't bother complaining about constructors or destructors, |
| 4946 | // though. |
| 4947 | } |
| 4948 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 4949 | void Sema::ActOnUninitializedDecl(Decl *RealDecl, |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 4950 | bool TypeMayContainAuto) { |
Argyrios Kyrtzidis | 48c2e90 | 2008-11-07 13:01:22 +0000 | [diff] [blame] | 4951 | // If there is no declaration, there was an error parsing it. Just ignore it. |
| 4952 | if (RealDecl == 0) |
| 4953 | return; |
| 4954 | |
Douglas Gregor | 27c8dc0 | 2008-10-29 00:13:59 +0000 | [diff] [blame] | 4955 | if (VarDecl *Var = dyn_cast<VarDecl>(RealDecl)) { |
| 4956 | QualType Type = Var->getType(); |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 4957 | |
Anders Carlsson | 6a75cd9 | 2009-07-11 00:34:39 +0000 | [diff] [blame] | 4958 | // C++0x [dcl.spec.auto]p3 |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 4959 | if (TypeMayContainAuto && Type->getContainedAutoType()) { |
Anders Carlsson | 6a75cd9 | 2009-07-11 00:34:39 +0000 | [diff] [blame] | 4960 | Diag(Var->getLocation(), diag::err_auto_var_requires_init) |
| 4961 | << Var->getDeclName() << Type; |
| 4962 | Var->setInvalidDecl(); |
| 4963 | return; |
| 4964 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4965 | |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 4966 | switch (Var->isThisDeclarationADefinition()) { |
| 4967 | case VarDecl::Definition: |
| 4968 | if (!Var->isStaticDataMember() || !Var->getAnyInitializer()) |
| 4969 | break; |
| 4970 | |
| 4971 | // We have an out-of-line definition of a static data member |
| 4972 | // that has an in-class initializer, so we type-check this like |
| 4973 | // a declaration. |
| 4974 | // |
| 4975 | // Fall through |
| 4976 | |
| 4977 | case VarDecl::DeclarationOnly: |
| 4978 | // It's only a declaration. |
| 4979 | |
| 4980 | // Block scope. C99 6.7p7: If an identifier for an object is |
| 4981 | // declared with no linkage (C99 6.2.2p6), the type for the |
| 4982 | // object shall be complete. |
John McCall | b6bbcc9 | 2010-10-15 04:57:14 +0000 | [diff] [blame] | 4983 | if (!Type->isDependentType() && Var->isLocalVarDecl() && |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 4984 | !Var->getLinkage() && !Var->isInvalidDecl() && |
| 4985 | RequireCompleteType(Var->getLocation(), Type, |
| 4986 | diag::err_typecheck_decl_incomplete_type)) |
| 4987 | Var->setInvalidDecl(); |
| 4988 | |
| 4989 | // Make sure that the type is not abstract. |
| 4990 | if (!Type->isDependentType() && !Var->isInvalidDecl() && |
| 4991 | RequireNonAbstractType(Var->getLocation(), Type, |
| 4992 | diag::err_abstract_type_in_decl, |
| 4993 | AbstractVariableType)) |
| 4994 | Var->setInvalidDecl(); |
| 4995 | return; |
| 4996 | |
| 4997 | case VarDecl::TentativeDefinition: |
| 4998 | // File scope. C99 6.9.2p2: A declaration of an identifier for an |
| 4999 | // object that has file scope without an initializer, and without a |
| 5000 | // storage-class specifier or with the storage-class specifier "static", |
| 5001 | // constitutes a tentative definition. Note: A tentative definition with |
| 5002 | // external linkage is valid (C99 6.2.2p5). |
| 5003 | if (!Var->isInvalidDecl()) { |
| 5004 | if (const IncompleteArrayType *ArrayT |
| 5005 | = Context.getAsIncompleteArrayType(Type)) { |
| 5006 | if (RequireCompleteType(Var->getLocation(), |
| 5007 | ArrayT->getElementType(), |
| 5008 | diag::err_illegal_decl_array_incomplete_type)) |
| 5009 | Var->setInvalidDecl(); |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 5010 | } else if (Var->getStorageClass() == SC_Static) { |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 5011 | // C99 6.9.2p3: If the declaration of an identifier for an object is |
| 5012 | // a tentative definition and has internal linkage (C99 6.2.2p3), the |
| 5013 | // declared type shall not be an incomplete type. |
| 5014 | // NOTE: code such as the following |
| 5015 | // static struct s; |
| 5016 | // struct s { int a; }; |
| 5017 | // is accepted by gcc. Hence here we issue a warning instead of |
| 5018 | // an error and we do not invalidate the static declaration. |
| 5019 | // NOTE: to avoid multiple warnings, only check the first declaration. |
| 5020 | if (Var->getPreviousDeclaration() == 0) |
| 5021 | RequireCompleteType(Var->getLocation(), Type, |
| 5022 | diag::ext_typecheck_decl_incomplete_type); |
| 5023 | } |
| 5024 | } |
| 5025 | |
| 5026 | // Record the tentative definition; we're done. |
| 5027 | if (!Var->isInvalidDecl()) |
| 5028 | TentativeDefinitions.push_back(Var); |
| 5029 | return; |
| 5030 | } |
| 5031 | |
| 5032 | // Provide a specific diagnostic for uninitialized variable |
| 5033 | // definitions with incomplete array type. |
| 5034 | if (Type->isIncompleteArrayType()) { |
Sebastian Redl | 6e82475 | 2009-11-05 19:47:47 +0000 | [diff] [blame] | 5035 | Diag(Var->getLocation(), |
| 5036 | diag::err_typecheck_incomplete_array_needs_initializer); |
| 5037 | Var->setInvalidDecl(); |
| 5038 | return; |
| 5039 | } |
| 5040 | |
John McCall | b567a8b | 2010-08-01 01:25:24 +0000 | [diff] [blame] | 5041 | // Provide a specific diagnostic for uninitialized variable |
| 5042 | // definitions with reference type. |
| 5043 | if (Type->isReferenceType()) { |
| 5044 | Diag(Var->getLocation(), diag::err_reference_var_requires_init) |
| 5045 | << Var->getDeclName() |
| 5046 | << SourceRange(Var->getLocation(), Var->getLocation()); |
| 5047 | Var->setInvalidDecl(); |
| 5048 | return; |
| 5049 | } |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 5050 | |
| 5051 | // Do not attempt to type-check the default initializer for a |
| 5052 | // variable with dependent type. |
| 5053 | if (Type->isDependentType()) |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 5054 | return; |
Douglas Gregor | 39da0b8 | 2009-09-09 23:08:42 +0000 | [diff] [blame] | 5055 | |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 5056 | if (Var->isInvalidDecl()) |
| 5057 | return; |
Douglas Gregor | 1ab537b | 2009-12-03 18:33:45 +0000 | [diff] [blame] | 5058 | |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 5059 | if (RequireCompleteType(Var->getLocation(), |
| 5060 | Context.getBaseElementType(Type), |
| 5061 | diag::err_typecheck_decl_incomplete_type)) { |
| 5062 | Var->setInvalidDecl(); |
| 5063 | return; |
Douglas Gregor | 18fe568 | 2008-11-03 20:45:27 +0000 | [diff] [blame] | 5064 | } |
Douglas Gregor | 27c8dc0 | 2008-10-29 00:13:59 +0000 | [diff] [blame] | 5065 | |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 5066 | // The variable can not have an abstract class type. |
| 5067 | if (RequireNonAbstractType(Var->getLocation(), Type, |
| 5068 | diag::err_abstract_type_in_decl, |
| 5069 | AbstractVariableType)) { |
| 5070 | Var->setInvalidDecl(); |
| 5071 | return; |
| 5072 | } |
| 5073 | |
Douglas Gregor | 516a6bc | 2010-03-08 02:45:10 +0000 | [diff] [blame] | 5074 | const RecordType *Record |
| 5075 | = Context.getBaseElementType(Type)->getAs<RecordType>(); |
| 5076 | if (Record && getLangOptions().CPlusPlus && !getLangOptions().CPlusPlus0x && |
| 5077 | cast<CXXRecordDecl>(Record->getDecl())->isPOD()) { |
| 5078 | // C++03 [dcl.init]p9: |
| 5079 | // If no initializer is specified for an object, and the |
| 5080 | // object is of (possibly cv-qualified) non-POD class type (or |
| 5081 | // array thereof), the object shall be default-initialized; if |
| 5082 | // the object is of const-qualified type, the underlying class |
| 5083 | // type shall have a user-declared default |
| 5084 | // constructor. Otherwise, if no initializer is specified for |
| 5085 | // a non- static object, the object and its subobjects, if |
| 5086 | // any, have an indeterminate initial value); if the object |
| 5087 | // or any of its subobjects are of const-qualified type, the |
| 5088 | // program is ill-formed. |
| 5089 | // FIXME: DPG thinks it is very fishy that C++0x disables this. |
| 5090 | } else { |
John McCall | e46f62c | 2010-08-01 01:24:59 +0000 | [diff] [blame] | 5091 | // Check for jumps past the implicit initializer. C++0x |
| 5092 | // clarifies that this applies to a "variable with automatic |
| 5093 | // storage duration", not a "local variable". |
| 5094 | if (getLangOptions().CPlusPlus && Var->hasLocalStorage()) |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 5095 | getCurFunction()->setHasBranchProtectedScope(); |
John McCall | e46f62c | 2010-08-01 01:24:59 +0000 | [diff] [blame] | 5096 | |
Douglas Gregor | 516a6bc | 2010-03-08 02:45:10 +0000 | [diff] [blame] | 5097 | InitializedEntity Entity = InitializedEntity::InitializeVariable(Var); |
| 5098 | InitializationKind Kind |
| 5099 | = InitializationKind::CreateDefault(Var->getLocation()); |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 5100 | |
Douglas Gregor | 516a6bc | 2010-03-08 02:45:10 +0000 | [diff] [blame] | 5101 | InitializationSequence InitSeq(*this, Entity, Kind, 0, 0); |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 5102 | ExprResult Init = InitSeq.Perform(*this, Entity, Kind, |
| 5103 | MultiExprArg(*this, 0, 0)); |
Douglas Gregor | 516a6bc | 2010-03-08 02:45:10 +0000 | [diff] [blame] | 5104 | if (Init.isInvalid()) |
| 5105 | Var->setInvalidDecl(); |
John McCall | 2998d6b | 2011-01-19 11:48:09 +0000 | [diff] [blame] | 5106 | else if (Init.get()) |
Douglas Gregor | 53c374f | 2010-12-07 00:41:46 +0000 | [diff] [blame] | 5107 | Var->setInit(MaybeCreateExprWithCleanups(Init.get())); |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 5108 | } |
Douglas Gregor | 516a6bc | 2010-03-08 02:45:10 +0000 | [diff] [blame] | 5109 | |
John McCall | 2998d6b | 2011-01-19 11:48:09 +0000 | [diff] [blame] | 5110 | CheckCompleteVariableDeclaration(Var); |
Douglas Gregor | 27c8dc0 | 2008-10-29 00:13:59 +0000 | [diff] [blame] | 5111 | } |
| 5112 | } |
| 5113 | |
John McCall | 2998d6b | 2011-01-19 11:48:09 +0000 | [diff] [blame] | 5114 | void Sema::CheckCompleteVariableDeclaration(VarDecl *var) { |
| 5115 | if (var->isInvalidDecl()) return; |
| 5116 | |
| 5117 | // All the following checks are C++ only. |
| 5118 | if (!getLangOptions().CPlusPlus) return; |
| 5119 | |
| 5120 | QualType baseType = Context.getBaseElementType(var->getType()); |
| 5121 | if (baseType->isDependentType()) return; |
| 5122 | |
| 5123 | // __block variables might require us to capture a copy-initializer. |
| 5124 | if (var->hasAttr<BlocksAttr>()) { |
| 5125 | // It's currently invalid to ever have a __block variable with an |
| 5126 | // array type; should we diagnose that here? |
| 5127 | |
| 5128 | // Regardless, we don't want to ignore array nesting when |
| 5129 | // constructing this copy. |
| 5130 | QualType type = var->getType(); |
| 5131 | |
| 5132 | if (type->isStructureOrClassType()) { |
| 5133 | SourceLocation poi = var->getLocation(); |
| 5134 | Expr *varRef = new (Context) DeclRefExpr(var, type, VK_LValue, poi); |
| 5135 | ExprResult result = |
| 5136 | PerformCopyInitialization( |
| 5137 | InitializedEntity::InitializeBlock(poi, type, false), |
| 5138 | poi, Owned(varRef)); |
| 5139 | if (!result.isInvalid()) { |
| 5140 | result = MaybeCreateExprWithCleanups(result); |
| 5141 | Expr *init = result.takeAs<Expr>(); |
| 5142 | Context.setBlockVarCopyInits(var, init); |
| 5143 | } |
| 5144 | } |
| 5145 | } |
| 5146 | |
| 5147 | // Check for global constructors. |
| 5148 | if (!var->getDeclContext()->isDependentContext() && |
| 5149 | var->hasGlobalStorage() && |
| 5150 | !var->isStaticLocal() && |
| 5151 | var->getInit() && |
| 5152 | !var->getInit()->isConstantInitializer(Context, |
| 5153 | baseType->isReferenceType())) |
| 5154 | Diag(var->getLocation(), diag::warn_global_constructor) |
| 5155 | << var->getInit()->getSourceRange(); |
| 5156 | |
| 5157 | // Require the destructor. |
| 5158 | if (const RecordType *recordType = baseType->getAs<RecordType>()) |
| 5159 | FinalizeVarWithDestructor(var, recordType); |
| 5160 | } |
| 5161 | |
Richard Smith | 483b9f3 | 2011-02-21 20:05:19 +0000 | [diff] [blame] | 5162 | /// FinalizeDeclaration - called by ParseDeclarationAfterDeclarator to perform |
| 5163 | /// any semantic actions necessary after any initializer has been attached. |
| 5164 | void |
| 5165 | Sema::FinalizeDeclaration(Decl *ThisDecl) { |
| 5166 | // Note that we are no longer parsing the initializer for this declaration. |
| 5167 | ParsingInitForAutoVars.erase(ThisDecl); |
| 5168 | } |
| 5169 | |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 5170 | Sema::DeclGroupPtrTy |
| 5171 | Sema::FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, |
| 5172 | Decl **Group, unsigned NumDecls) { |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 5173 | llvm::SmallVector<Decl*, 8> Decls; |
Eli Friedman | c1dc653 | 2009-05-29 01:49:24 +0000 | [diff] [blame] | 5174 | |
| 5175 | if (DS.isTypeSpecOwned()) |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 5176 | Decls.push_back(DS.getRepAsDecl()); |
Eli Friedman | c1dc653 | 2009-05-29 01:49:24 +0000 | [diff] [blame] | 5177 | |
Richard Smith | 406c38e | 2011-02-23 00:37:57 +0000 | [diff] [blame] | 5178 | for (unsigned i = 0; i != NumDecls; ++i) |
| 5179 | if (Decl *D = Group[i]) |
| 5180 | Decls.push_back(D); |
| 5181 | |
| 5182 | return BuildDeclaratorGroup(Decls.data(), Decls.size(), |
| 5183 | DS.getTypeSpecType() == DeclSpec::TST_auto); |
| 5184 | } |
| 5185 | |
| 5186 | /// BuildDeclaratorGroup - convert a list of declarations into a declaration |
| 5187 | /// group, performing any necessary semantic checking. |
| 5188 | Sema::DeclGroupPtrTy |
| 5189 | Sema::BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, |
| 5190 | bool TypeMayContainAuto) { |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 5191 | // C++0x [dcl.spec.auto]p7: |
| 5192 | // If the type deduced for the template parameter U is not the same in each |
| 5193 | // deduction, the program is ill-formed. |
| 5194 | // FIXME: When initializer-list support is added, a distinction is needed |
| 5195 | // between the deduced type U and the deduced type which 'auto' stands for. |
| 5196 | // auto a = 0, b = { 1, 2, 3 }; |
| 5197 | // is legal because the deduced type U is 'int' in both cases. |
Richard Smith | 406c38e | 2011-02-23 00:37:57 +0000 | [diff] [blame] | 5198 | if (TypeMayContainAuto && NumDecls > 1) { |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 5199 | QualType Deduced; |
| 5200 | CanQualType DeducedCanon; |
| 5201 | VarDecl *DeducedDecl = 0; |
| 5202 | for (unsigned i = 0; i != NumDecls; ++i) { |
| 5203 | if (VarDecl *D = dyn_cast<VarDecl>(Group[i])) { |
| 5204 | AutoType *AT = D->getType()->getContainedAutoType(); |
Richard Smith | 406c38e | 2011-02-23 00:37:57 +0000 | [diff] [blame] | 5205 | // Don't reissue diagnostics when instantiating a template. |
| 5206 | if (AT && D->isInvalidDecl()) |
| 5207 | break; |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 5208 | if (AT && AT->isDeduced()) { |
| 5209 | QualType U = AT->getDeducedType(); |
| 5210 | CanQualType UCanon = Context.getCanonicalType(U); |
| 5211 | if (Deduced.isNull()) { |
| 5212 | Deduced = U; |
| 5213 | DeducedCanon = UCanon; |
| 5214 | DeducedDecl = D; |
| 5215 | } else if (DeducedCanon != UCanon) { |
Richard Smith | 406c38e | 2011-02-23 00:37:57 +0000 | [diff] [blame] | 5216 | Diag(D->getTypeSourceInfo()->getTypeLoc().getBeginLoc(), |
| 5217 | diag::err_auto_different_deductions) |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 5218 | << Deduced << DeducedDecl->getDeclName() |
| 5219 | << U << D->getDeclName() |
| 5220 | << DeducedDecl->getInit()->getSourceRange() |
| 5221 | << D->getInit()->getSourceRange(); |
Richard Smith | 406c38e | 2011-02-23 00:37:57 +0000 | [diff] [blame] | 5222 | D->setInvalidDecl(); |
Richard Smith | 34b41d9 | 2011-02-20 03:19:35 +0000 | [diff] [blame] | 5223 | break; |
| 5224 | } |
| 5225 | } |
| 5226 | } |
| 5227 | } |
| 5228 | } |
| 5229 | |
Richard Smith | 406c38e | 2011-02-23 00:37:57 +0000 | [diff] [blame] | 5230 | return DeclGroupPtrTy::make(DeclGroupRef::Create(Context, Group, NumDecls)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5231 | } |
Steve Naroff | e1223f7 | 2007-08-28 03:03:08 +0000 | [diff] [blame] | 5232 | |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 5233 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 5234 | /// ActOnParamDeclarator - Called from Parser::ParseFunctionDeclarator() |
| 5235 | /// to introduce parameters into function prototype scope. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 5236 | Decl *Sema::ActOnParamDeclarator(Scope *S, Declarator &D) { |
Chris Lattner | 985abd9 | 2008-06-26 06:49:43 +0000 | [diff] [blame] | 5237 | const DeclSpec &DS = D.getDeclSpec(); |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 5238 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 5239 | // Verify C99 6.7.5.3p2: The only SCS allowed is 'register'. |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 5240 | VarDecl::StorageClass StorageClass = SC_None; |
| 5241 | VarDecl::StorageClass StorageClassAsWritten = SC_None; |
Daniel Dunbar | 33ad012 | 2008-09-03 21:54:21 +0000 | [diff] [blame] | 5242 | if (DS.getStorageClassSpec() == DeclSpec::SCS_register) { |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 5243 | StorageClass = SC_Register; |
| 5244 | StorageClassAsWritten = SC_Register; |
Daniel Dunbar | 33ad012 | 2008-09-03 21:54:21 +0000 | [diff] [blame] | 5245 | } else if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified) { |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 5246 | Diag(DS.getStorageClassSpecLoc(), |
| 5247 | diag::err_invalid_storage_class_in_func_decl); |
Chris Lattner | 985abd9 | 2008-06-26 06:49:43 +0000 | [diff] [blame] | 5248 | D.getMutableDeclSpec().ClearStorageClassSpecs(); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 5249 | } |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 5250 | |
| 5251 | if (D.getDeclSpec().isThreadSpecified()) |
| 5252 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_invalid_thread); |
| 5253 | |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 5254 | DiagnoseFunctionSpecifiers(D); |
| 5255 | |
Douglas Gregor | 402abb5 | 2009-05-28 23:31:59 +0000 | [diff] [blame] | 5256 | TagDecl *OwnedDecl = 0; |
John McCall | bf1a028 | 2010-06-04 23:28:52 +0000 | [diff] [blame] | 5257 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S, &OwnedDecl); |
| 5258 | QualType parmDeclType = TInfo->getType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5259 | |
Douglas Gregor | a8bc8c9 | 2010-12-23 22:44:42 +0000 | [diff] [blame] | 5260 | if (getLangOptions().CPlusPlus) { |
| 5261 | // Check that there are no default arguments inside the type of this |
| 5262 | // parameter. |
| 5263 | CheckExtraCXXDefaultArguments(D); |
| 5264 | |
| 5265 | if (OwnedDecl && OwnedDecl->isDefinition()) { |
| 5266 | // C++ [dcl.fct]p6: |
| 5267 | // Types shall not be defined in return or parameter types. |
| 5268 | Diag(OwnedDecl->getLocation(), diag::err_type_defined_in_param_type) |
| 5269 | << Context.getTypeDeclType(OwnedDecl); |
| 5270 | } |
| 5271 | |
| 5272 | // Parameter declarators cannot be qualified (C++ [dcl.meaning]p1). |
| 5273 | if (D.getCXXScopeSpec().isSet()) { |
| 5274 | Diag(D.getIdentifierLoc(), diag::err_qualified_param_declarator) |
| 5275 | << D.getCXXScopeSpec().getRange(); |
| 5276 | D.getCXXScopeSpec().clear(); |
| 5277 | } |
Douglas Gregor | 402abb5 | 2009-05-28 23:31:59 +0000 | [diff] [blame] | 5278 | } |
| 5279 | |
Sean Hunt | 7533a5b | 2010-11-03 01:07:06 +0000 | [diff] [blame] | 5280 | // Ensure we have a valid name |
| 5281 | IdentifierInfo *II = 0; |
| 5282 | if (D.hasName()) { |
| 5283 | II = D.getIdentifier(); |
| 5284 | if (!II) { |
| 5285 | Diag(D.getIdentifierLoc(), diag::err_bad_parameter_name) |
| 5286 | << GetNameForDeclarator(D).getName().getAsString(); |
| 5287 | D.setInvalidType(true); |
| 5288 | } |
| 5289 | } |
| 5290 | |
Chris Lattner | d84aac1 | 2010-02-22 00:40:25 +0000 | [diff] [blame] | 5291 | // 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] | 5292 | if (II) { |
John McCall | 10f2873 | 2010-03-18 06:42:38 +0000 | [diff] [blame] | 5293 | LookupResult R(*this, II, D.getIdentifierLoc(), LookupOrdinaryName, |
| 5294 | ForRedeclaration); |
| 5295 | LookupName(R, S); |
| 5296 | if (R.isSingleResult()) { |
| 5297 | NamedDecl *PrevDecl = R.getFoundDecl(); |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 5298 | if (PrevDecl->isTemplateParameter()) { |
| 5299 | // Maybe we will complain about the shadowed template parameter. |
| 5300 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl); |
| 5301 | // Just pretend that we didn't see the previous declaration. |
| 5302 | PrevDecl = 0; |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 5303 | } else if (S->isDeclScope(PrevDecl)) { |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 5304 | Diag(D.getIdentifierLoc(), diag::err_param_redefinition) << II; |
Chris Lattner | d84aac1 | 2010-02-22 00:40:25 +0000 | [diff] [blame] | 5305 | Diag(PrevDecl->getLocation(), diag::note_previous_declaration); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 5306 | |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 5307 | // Recover by removing the name |
| 5308 | II = 0; |
| 5309 | D.SetIdentifier(0, D.getIdentifierLoc()); |
Fariborz Jahanian | 9a66c30 | 2010-02-12 21:53:14 +0000 | [diff] [blame] | 5310 | D.setInvalidType(true); |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 5311 | } |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 5312 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5313 | } |
Steve Naroff | 6a9f3e3 | 2007-08-07 22:44:21 +0000 | [diff] [blame] | 5314 | |
John McCall | 7a9813c | 2010-01-22 00:28:27 +0000 | [diff] [blame] | 5315 | // Temporarily put parameter variables in the translation unit, not |
| 5316 | // the enclosing context. This prevents them from accidentally |
| 5317 | // looking like class members in C++. |
Douglas Gregor | cb27b0f | 2010-04-12 07:48:19 +0000 | [diff] [blame] | 5318 | ParmVarDecl *New = CheckParameter(Context.getTranslationUnitDecl(), |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 5319 | D.getSourceRange().getBegin(), |
| 5320 | D.getIdentifierLoc(), II, |
| 5321 | parmDeclType, TInfo, |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 5322 | StorageClass, StorageClassAsWritten); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5323 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 5324 | if (D.isInvalidType()) |
Douglas Gregor | cb27b0f | 2010-04-12 07:48:19 +0000 | [diff] [blame] | 5325 | New->setInvalidDecl(); |
| 5326 | |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 5327 | // Add the parameter declaration into this scope. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 5328 | S->AddDecl(New); |
Argyrios Kyrtzidis | 87f3ff0 | 2008-04-12 00:47:19 +0000 | [diff] [blame] | 5329 | if (II) |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 5330 | IdResolver.AddDecl(New); |
Nate Begeman | b7894b5 | 2008-02-17 21:20:31 +0000 | [diff] [blame] | 5331 | |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 5332 | ProcessDeclAttributes(S, New, D); |
Mike Stump | ea000bf | 2009-04-30 00:19:40 +0000 | [diff] [blame] | 5333 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 5334 | if (New->hasAttr<BlocksAttr>()) { |
Mike Stump | ea000bf | 2009-04-30 00:19:40 +0000 | [diff] [blame] | 5335 | Diag(New->getLocation(), diag::err_block_on_nonlocal); |
| 5336 | } |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 5337 | return New; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5338 | } |
Fariborz Jahanian | 306d68f | 2007-11-08 23:49:49 +0000 | [diff] [blame] | 5339 | |
John McCall | 82dc009 | 2010-06-04 11:21:44 +0000 | [diff] [blame] | 5340 | /// \brief Synthesizes a variable for a parameter arising from a |
| 5341 | /// typedef. |
| 5342 | ParmVarDecl *Sema::BuildParmVarDeclForTypedef(DeclContext *DC, |
| 5343 | SourceLocation Loc, |
| 5344 | QualType T) { |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 5345 | /* FIXME: setting StartLoc == Loc. |
| 5346 | Would it be worth to modify callers so as to provide proper source |
| 5347 | location for the unnamed parameters, embedding the parameter's type? */ |
| 5348 | ParmVarDecl *Param = ParmVarDecl::Create(Context, DC, Loc, Loc, 0, |
John McCall | 82dc009 | 2010-06-04 11:21:44 +0000 | [diff] [blame] | 5349 | T, Context.getTrivialTypeSourceInfo(T, Loc), |
John McCall | d931b08 | 2010-08-26 03:08:43 +0000 | [diff] [blame] | 5350 | SC_None, SC_None, 0); |
John McCall | 82dc009 | 2010-06-04 11:21:44 +0000 | [diff] [blame] | 5351 | Param->setImplicit(); |
| 5352 | return Param; |
| 5353 | } |
| 5354 | |
John McCall | fbce0e1 | 2010-08-24 09:05:15 +0000 | [diff] [blame] | 5355 | void Sema::DiagnoseUnusedParameters(ParmVarDecl * const *Param, |
| 5356 | ParmVarDecl * const *ParamEnd) { |
John McCall | fbce0e1 | 2010-08-24 09:05:15 +0000 | [diff] [blame] | 5357 | // Don't diagnose unused-parameter errors in template instantiations; we |
| 5358 | // will already have done so in the template itself. |
| 5359 | if (!ActiveTemplateInstantiations.empty()) |
| 5360 | return; |
| 5361 | |
| 5362 | for (; Param != ParamEnd; ++Param) { |
| 5363 | if (!(*Param)->isUsed() && (*Param)->getDeclName() && |
| 5364 | !(*Param)->hasAttr<UnusedAttr>()) { |
| 5365 | Diag((*Param)->getLocation(), diag::warn_unused_parameter) |
| 5366 | << (*Param)->getDeclName(); |
| 5367 | } |
| 5368 | } |
| 5369 | } |
| 5370 | |
Argyrios Kyrtzidis | 3532fdd | 2010-11-17 23:11:54 +0000 | [diff] [blame] | 5371 | void Sema::DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Param, |
| 5372 | ParmVarDecl * const *ParamEnd, |
| 5373 | QualType ReturnTy, |
| 5374 | NamedDecl *D) { |
Argyrios Kyrtzidis | 1380a14 | 2010-11-18 00:20:36 +0000 | [diff] [blame] | 5375 | if (LangOpts.NumLargeByValueCopy == 0) // No check. |
Argyrios Kyrtzidis | 3532fdd | 2010-11-17 23:11:54 +0000 | [diff] [blame] | 5376 | return; |
| 5377 | |
Argyrios Kyrtzidis | 1380a14 | 2010-11-18 00:20:36 +0000 | [diff] [blame] | 5378 | // Warn if the return value is pass-by-value and larger than the specified |
| 5379 | // threshold. |
Argyrios Kyrtzidis | f4bed3f | 2010-11-18 18:51:03 +0000 | [diff] [blame] | 5380 | if (ReturnTy->isPODType()) { |
Argyrios Kyrtzidis | 3532fdd | 2010-11-17 23:11:54 +0000 | [diff] [blame] | 5381 | unsigned Size = Context.getTypeSizeInChars(ReturnTy).getQuantity(); |
Argyrios Kyrtzidis | 1380a14 | 2010-11-18 00:20:36 +0000 | [diff] [blame] | 5382 | if (Size > LangOpts.NumLargeByValueCopy) |
Argyrios Kyrtzidis | 3532fdd | 2010-11-17 23:11:54 +0000 | [diff] [blame] | 5383 | Diag(D->getLocation(), diag::warn_return_value_size) |
| 5384 | << D->getDeclName() << Size; |
| 5385 | } |
| 5386 | |
Argyrios Kyrtzidis | 1380a14 | 2010-11-18 00:20:36 +0000 | [diff] [blame] | 5387 | // Warn if any parameter is pass-by-value and larger than the specified |
| 5388 | // threshold. |
Argyrios Kyrtzidis | 3532fdd | 2010-11-17 23:11:54 +0000 | [diff] [blame] | 5389 | for (; Param != ParamEnd; ++Param) { |
| 5390 | QualType T = (*Param)->getType(); |
| 5391 | if (!T->isPODType()) |
| 5392 | continue; |
| 5393 | unsigned Size = Context.getTypeSizeInChars(T).getQuantity(); |
Argyrios Kyrtzidis | 1380a14 | 2010-11-18 00:20:36 +0000 | [diff] [blame] | 5394 | if (Size > LangOpts.NumLargeByValueCopy) |
Argyrios Kyrtzidis | 3532fdd | 2010-11-17 23:11:54 +0000 | [diff] [blame] | 5395 | Diag((*Param)->getLocation(), diag::warn_parameter_size) |
| 5396 | << (*Param)->getDeclName() << Size; |
| 5397 | } |
| 5398 | } |
| 5399 | |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 5400 | ParmVarDecl *Sema::CheckParameter(DeclContext *DC, SourceLocation StartLoc, |
| 5401 | SourceLocation NameLoc, IdentifierInfo *Name, |
| 5402 | QualType T, TypeSourceInfo *TSInfo, |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 5403 | VarDecl::StorageClass StorageClass, |
| 5404 | VarDecl::StorageClass StorageClassAsWritten) { |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 5405 | ParmVarDecl *New = ParmVarDecl::Create(Context, DC, StartLoc, NameLoc, Name, |
| 5406 | adjustParameterType(T), TSInfo, |
Douglas Gregor | 16573fa | 2010-04-19 22:54:31 +0000 | [diff] [blame] | 5407 | StorageClass, StorageClassAsWritten, |
| 5408 | 0); |
Douglas Gregor | cb27b0f | 2010-04-12 07:48:19 +0000 | [diff] [blame] | 5409 | |
| 5410 | // Parameters can not be abstract class types. |
| 5411 | // For record types, this is done by the AbstractClassUsageDiagnoser once |
| 5412 | // the class has been completely parsed. |
| 5413 | if (!CurContext->isRecord() && |
| 5414 | RequireNonAbstractType(NameLoc, T, diag::err_abstract_type_in_decl, |
| 5415 | AbstractParamType)) |
| 5416 | New->setInvalidDecl(); |
| 5417 | |
| 5418 | // Parameter declarators cannot be interface types. All ObjC objects are |
| 5419 | // passed by reference. |
John McCall | c12c5bb | 2010-05-15 11:32:37 +0000 | [diff] [blame] | 5420 | if (T->isObjCObjectType()) { |
Douglas Gregor | cb27b0f | 2010-04-12 07:48:19 +0000 | [diff] [blame] | 5421 | Diag(NameLoc, |
| 5422 | diag::err_object_cannot_be_passed_returned_by_value) << 1 << T; |
| 5423 | New->setInvalidDecl(); |
| 5424 | } |
| 5425 | |
| 5426 | // ISO/IEC TR 18037 S6.7.3: "The type of an object with automatic storage |
| 5427 | // duration shall not be qualified by an address-space qualifier." |
| 5428 | // Since all parameters have automatic store duration, they can not have |
| 5429 | // an address space. |
| 5430 | if (T.getAddressSpace() != 0) { |
| 5431 | Diag(NameLoc, diag::err_arg_with_address_space); |
| 5432 | New->setInvalidDecl(); |
| 5433 | } |
| 5434 | |
| 5435 | return New; |
| 5436 | } |
| 5437 | |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 5438 | void Sema::ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, |
| 5439 | SourceLocation LocAfterDecls) { |
Abramo Bagnara | 075f8f1 | 2010-12-10 16:29:40 +0000 | [diff] [blame] | 5440 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo(); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 5441 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5442 | // Verify 6.9.1p6: 'every identifier in the identifier list shall be declared' |
| 5443 | // for a K&R function. |
| 5444 | if (!FTI.hasPrototype) { |
Douglas Gregor | 2610348 | 2009-04-02 03:14:12 +0000 | [diff] [blame] | 5445 | for (int i = FTI.NumArgs; i != 0; /* decrement in loop */) { |
| 5446 | --i; |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 5447 | if (FTI.ArgInfo[i].Param == 0) { |
Daniel Dunbar | 5ffe14c | 2009-10-18 20:26:27 +0000 | [diff] [blame] | 5448 | llvm::SmallString<256> Code; |
| 5449 | llvm::raw_svector_ostream(Code) << " int " |
Daniel Dunbar | 01eb9b9 | 2009-10-18 21:17:35 +0000 | [diff] [blame] | 5450 | << FTI.ArgInfo[i].Ident->getName() |
Daniel Dunbar | 5ffe14c | 2009-10-18 20:26:27 +0000 | [diff] [blame] | 5451 | << ";\n"; |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 5452 | Diag(FTI.ArgInfo[i].IdentLoc, diag::ext_param_not_declared) |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 5453 | << FTI.ArgInfo[i].Ident |
Douglas Gregor | 849b243 | 2010-03-31 17:46:05 +0000 | [diff] [blame] | 5454 | << FixItHint::CreateInsertion(LocAfterDecls, Code.str()); |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 5455 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5456 | // Implicitly declare the argument as type 'int' for lack of a better |
| 5457 | // type. |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 5458 | DeclSpec DS; |
| 5459 | const char* PrevSpec; // unused |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 5460 | unsigned DiagID; // unused |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5461 | DS.SetTypeSpecType(DeclSpec::TST_int, FTI.ArgInfo[i].IdentLoc, |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 5462 | PrevSpec, DiagID); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 5463 | Declarator ParamD(DS, Declarator::KNRTypeListContext); |
| 5464 | ParamD.SetIdentifier(FTI.ArgInfo[i].Ident, FTI.ArgInfo[i].IdentLoc); |
Douglas Gregor | be109b3 | 2009-01-23 16:23:13 +0000 | [diff] [blame] | 5465 | FTI.ArgInfo[i].Param = ActOnParamDeclarator(S, ParamD); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5466 | } |
| 5467 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5468 | } |
Douglas Gregor | be109b3 | 2009-01-23 16:23:13 +0000 | [diff] [blame] | 5469 | } |
| 5470 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 5471 | Decl *Sema::ActOnStartOfFunctionDef(Scope *FnBodyScope, |
| 5472 | Declarator &D) { |
Douglas Gregor | be109b3 | 2009-01-23 16:23:13 +0000 | [diff] [blame] | 5473 | assert(getCurFunctionDecl() == 0 && "Function parsing confused"); |
Abramo Bagnara | 075f8f1 | 2010-12-10 16:29:40 +0000 | [diff] [blame] | 5474 | assert(D.isFunctionDeclarator() && "Not a function declarator!"); |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 5475 | Scope *ParentScope = FnBodyScope->getParent(); |
Steve Naroff | adbbd0c | 2008-01-14 20:51:29 +0000 | [diff] [blame] | 5476 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 5477 | Decl *DP = HandleDeclarator(ParentScope, D, |
| 5478 | MultiTemplateParamsArg(*this), |
| 5479 | /*IsFunctionDefinition=*/true); |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 5480 | return ActOnStartOfFunctionDef(FnBodyScope, DP); |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 5481 | } |
| 5482 | |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 5483 | static bool ShouldWarnAboutMissingPrototype(const FunctionDecl *FD) { |
| 5484 | // Don't warn about invalid declarations. |
| 5485 | if (FD->isInvalidDecl()) |
| 5486 | return false; |
Anders Carlsson | 63fb673 | 2009-12-09 03:44:46 +0000 | [diff] [blame] | 5487 | |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 5488 | // Or declarations that aren't global. |
| 5489 | if (!FD->isGlobal()) |
| 5490 | return false; |
Anders Carlsson | 63fb673 | 2009-12-09 03:44:46 +0000 | [diff] [blame] | 5491 | |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 5492 | // Don't warn about C++ member functions. |
| 5493 | if (isa<CXXMethodDecl>(FD)) |
| 5494 | return false; |
Anders Carlsson | 63fb673 | 2009-12-09 03:44:46 +0000 | [diff] [blame] | 5495 | |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 5496 | // Don't warn about 'main'. |
| 5497 | if (FD->isMain()) |
| 5498 | return false; |
Anders Carlsson | 63fb673 | 2009-12-09 03:44:46 +0000 | [diff] [blame] | 5499 | |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 5500 | // Don't warn about inline functions. |
| 5501 | if (FD->isInlineSpecified()) |
| 5502 | return false; |
Anders Carlsson | 63fb673 | 2009-12-09 03:44:46 +0000 | [diff] [blame] | 5503 | |
| 5504 | // Don't warn about function templates. |
| 5505 | if (FD->getDescribedFunctionTemplate()) |
| 5506 | return false; |
| 5507 | |
| 5508 | // Don't warn about function template specializations. |
| 5509 | if (FD->isFunctionTemplateSpecialization()) |
| 5510 | return false; |
| 5511 | |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 5512 | bool MissingPrototype = true; |
| 5513 | for (const FunctionDecl *Prev = FD->getPreviousDeclaration(); |
| 5514 | Prev; Prev = Prev->getPreviousDeclaration()) { |
| 5515 | // Ignore any declarations that occur in function or method |
| 5516 | // scope, because they aren't visible from the header. |
| 5517 | if (Prev->getDeclContext()->isFunctionOrMethod()) |
| 5518 | continue; |
| 5519 | |
| 5520 | MissingPrototype = !Prev->getType()->isFunctionProtoType(); |
| 5521 | break; |
| 5522 | } |
| 5523 | |
| 5524 | return MissingPrototype; |
| 5525 | } |
| 5526 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 5527 | Decl *Sema::ActOnStartOfFunctionDef(Scope *FnBodyScope, Decl *D) { |
Anders Carlsson | 0ebb6d3 | 2009-10-29 15:46:07 +0000 | [diff] [blame] | 5528 | // Clear the last template instantiation error context. |
| 5529 | LastTemplateInstantiationErrorContext = ActiveTemplateInstantiation(); |
| 5530 | |
Douglas Gregor | 52591bf | 2009-06-24 00:54:41 +0000 | [diff] [blame] | 5531 | if (!D) |
| 5532 | return D; |
Douglas Gregor | d83d040 | 2009-08-22 00:34:47 +0000 | [diff] [blame] | 5533 | FunctionDecl *FD = 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5534 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 5535 | if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(D)) |
Douglas Gregor | d83d040 | 2009-08-22 00:34:47 +0000 | [diff] [blame] | 5536 | FD = FunTmpl->getTemplatedDecl(); |
| 5537 | else |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 5538 | FD = cast<FunctionDecl>(D); |
Douglas Gregor | 6fc17ff | 2008-10-29 15:10:40 +0000 | [diff] [blame] | 5539 | |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 5540 | // Enter a new function scope |
| 5541 | PushFunctionScope(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5542 | |
Douglas Gregor | 6fc17ff | 2008-10-29 15:10:40 +0000 | [diff] [blame] | 5543 | // See if this is a redefinition. |
Charles Davis | f3f8d2a | 2010-02-18 02:00:42 +0000 | [diff] [blame] | 5544 | // But don't complain if we're in GNU89 mode and the previous definition |
| 5545 | // was an extern inline function. |
Douglas Gregor | 6fc17ff | 2008-10-29 15:10:40 +0000 | [diff] [blame] | 5546 | const FunctionDecl *Definition; |
Argyrios Kyrtzidis | 06a54a3 | 2010-07-07 11:31:19 +0000 | [diff] [blame] | 5547 | if (FD->hasBody(Definition) && |
Charles Davis | f3f8d2a | 2010-02-18 02:00:42 +0000 | [diff] [blame] | 5548 | !canRedefineFunction(Definition, getLangOptions())) { |
Douglas Gregor | fbc5b49 | 2010-09-07 15:51:01 +0000 | [diff] [blame] | 5549 | if (getLangOptions().GNUMode && Definition->isInlineSpecified() && |
| 5550 | Definition->getStorageClass() == SC_Extern) |
| 5551 | Diag(FD->getLocation(), diag::err_redefinition_extern_inline) |
| 5552 | << FD->getDeclName() << getLangOptions().CPlusPlus; |
| 5553 | else |
| 5554 | Diag(FD->getLocation(), diag::err_redefinition) << FD->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 5555 | Diag(Definition->getLocation(), diag::note_previous_definition); |
Douglas Gregor | 6fc17ff | 2008-10-29 15:10:40 +0000 | [diff] [blame] | 5556 | } |
| 5557 | |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 5558 | // Builtin functions cannot be defined. |
Douglas Gregor | 7814e6d | 2009-09-12 00:22:50 +0000 | [diff] [blame] | 5559 | if (unsigned BuiltinID = FD->getBuiltinID()) { |
Douglas Gregor | 655753a | 2009-02-17 16:03:01 +0000 | [diff] [blame] | 5560 | if (!Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) { |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 5561 | Diag(FD->getLocation(), diag::err_builtin_definition) << FD; |
Douglas Gregor | 655753a | 2009-02-17 16:03:01 +0000 | [diff] [blame] | 5562 | FD->setInvalidDecl(); |
| 5563 | } |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 5564 | } |
| 5565 | |
Eli Friedman | 7f0f5dc | 2009-03-04 07:30:59 +0000 | [diff] [blame] | 5566 | // The return type of a function definition must be complete |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 5567 | // (C99 6.9.1p3, C++ [dcl.fct]p6). |
| 5568 | QualType ResultType = FD->getResultType(); |
| 5569 | if (!ResultType->isDependentType() && !ResultType->isVoidType() && |
Chris Lattner | 65e6a09 | 2009-04-29 05:12:23 +0000 | [diff] [blame] | 5570 | !FD->isInvalidDecl() && |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 5571 | RequireCompleteType(FD->getLocation(), ResultType, |
| 5572 | diag::err_func_def_incomplete_result)) |
Eli Friedman | 7f0f5dc | 2009-03-04 07:30:59 +0000 | [diff] [blame] | 5573 | FD->setInvalidDecl(); |
Eli Friedman | 7f0f5dc | 2009-03-04 07:30:59 +0000 | [diff] [blame] | 5574 | |
Douglas Gregor | 8499f3f | 2009-03-31 16:35:03 +0000 | [diff] [blame] | 5575 | // GNU warning -Wmissing-prototypes: |
| 5576 | // Warn if a global function is defined without a previous |
| 5577 | // prototype declaration. This warning is issued even if the |
| 5578 | // definition itself provides a prototype. The aim is to detect |
| 5579 | // global functions that fail to be declared in header files. |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 5580 | if (ShouldWarnAboutMissingPrototype(FD)) |
| 5581 | Diag(FD->getLocation(), diag::warn_missing_prototype) << FD; |
Douglas Gregor | 8499f3f | 2009-03-31 16:35:03 +0000 | [diff] [blame] | 5582 | |
Douglas Gregor | e2c31ff | 2009-05-15 17:59:04 +0000 | [diff] [blame] | 5583 | if (FnBodyScope) |
| 5584 | PushDeclContext(FnBodyScope, FD); |
Anton Korobeynikov | 2f40270 | 2008-12-26 00:52:02 +0000 | [diff] [blame] | 5585 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 5586 | // Check the validity of our function parameters |
Douglas Gregor | 82aa713 | 2010-11-01 18:37:59 +0000 | [diff] [blame] | 5587 | CheckParmsForFunctionDef(FD->param_begin(), FD->param_end(), |
| 5588 | /*CheckParameterNames=*/true); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 5589 | |
| 5590 | // Introduce our parameters into the function scope |
| 5591 | for (unsigned p = 0, NumParams = FD->getNumParams(); p < NumParams; ++p) { |
| 5592 | ParmVarDecl *Param = FD->getParamDecl(p); |
Douglas Gregor | a8cc8ce | 2009-01-09 18:51:29 +0000 | [diff] [blame] | 5593 | Param->setOwningFunction(FD); |
| 5594 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 5595 | // If this has an identifier, add it to the scope stack. |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 5596 | if (Param->getIdentifier() && FnBodyScope) { |
Argyrios Kyrtzidis | 0827408 | 2010-12-15 18:44:22 +0000 | [diff] [blame] | 5597 | CheckShadow(FnBodyScope, Param); |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 5598 | |
Argyrios Kyrtzidis | 87f3ff0 | 2008-04-12 00:47:19 +0000 | [diff] [blame] | 5599 | PushOnScopeChains(Param, FnBodyScope); |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 5600 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5601 | } |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 5602 | |
Anton Korobeynikov | 2f40270 | 2008-12-26 00:52:02 +0000 | [diff] [blame] | 5603 | // Checking attributes of current function definition |
| 5604 | // dllimport attribute. |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 5605 | DLLImportAttr *DA = FD->getAttr<DLLImportAttr>(); |
| 5606 | if (DA && (!FD->getAttr<DLLExportAttr>())) { |
| 5607 | // dllimport attribute cannot be directly applied to definition. |
| 5608 | if (!DA->isInherited()) { |
Anton Korobeynikov | 2f40270 | 2008-12-26 00:52:02 +0000 | [diff] [blame] | 5609 | Diag(FD->getLocation(), |
| 5610 | diag::err_attribute_can_be_applied_only_to_symbol_declaration) |
| 5611 | << "dllimport"; |
| 5612 | FD->setInvalidDecl(); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 5613 | return FD; |
Ted Kremenek | 12911a8 | 2010-02-21 05:12:53 +0000 | [diff] [blame] | 5614 | } |
| 5615 | |
| 5616 | // Visual C++ appears to not think this is an issue, so only issue |
| 5617 | // a warning when Microsoft extensions are disabled. |
| 5618 | if (!LangOpts.Microsoft) { |
Anton Korobeynikov | 2f40270 | 2008-12-26 00:52:02 +0000 | [diff] [blame] | 5619 | // If a symbol previously declared dllimport is later defined, the |
| 5620 | // attribute is ignored in subsequent references, and a warning is |
| 5621 | // emitted. |
| 5622 | Diag(FD->getLocation(), |
| 5623 | diag::warn_redeclaration_without_attribute_prev_attribute_ignored) |
Daniel Dunbar | 4087f27 | 2010-08-17 22:39:59 +0000 | [diff] [blame] | 5624 | << FD->getName() << "dllimport"; |
Anton Korobeynikov | 2f40270 | 2008-12-26 00:52:02 +0000 | [diff] [blame] | 5625 | } |
| 5626 | } |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 5627 | return FD; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5628 | } |
| 5629 | |
Douglas Gregor | 5077c38 | 2010-05-15 06:01:05 +0000 | [diff] [blame] | 5630 | /// \brief Given the set of return statements within a function body, |
| 5631 | /// compute the variables that are subject to the named return value |
| 5632 | /// optimization. |
| 5633 | /// |
| 5634 | /// Each of the variables that is subject to the named return value |
| 5635 | /// optimization will be marked as NRVO variables in the AST, and any |
| 5636 | /// return statement that has a marked NRVO variable as its NRVO candidate can |
| 5637 | /// use the named return value optimization. |
| 5638 | /// |
| 5639 | /// This function applies a very simplistic algorithm for NRVO: if every return |
| 5640 | /// statement in the function has the same NRVO candidate, that candidate is |
| 5641 | /// the NRVO variable. |
| 5642 | /// |
| 5643 | /// FIXME: Employ a smarter algorithm that accounts for multiple return |
| 5644 | /// statements and the lifetimes of the NRVO candidates. We should be able to |
| 5645 | /// find a maximal set of NRVO variables. |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 5646 | static void ComputeNRVO(Stmt *Body, FunctionScopeInfo *Scope) { |
| 5647 | ReturnStmt **Returns = Scope->Returns.data(); |
| 5648 | |
Douglas Gregor | 5077c38 | 2010-05-15 06:01:05 +0000 | [diff] [blame] | 5649 | const VarDecl *NRVOCandidate = 0; |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 5650 | for (unsigned I = 0, E = Scope->Returns.size(); I != E; ++I) { |
Douglas Gregor | 5077c38 | 2010-05-15 06:01:05 +0000 | [diff] [blame] | 5651 | if (!Returns[I]->getNRVOCandidate()) |
| 5652 | return; |
| 5653 | |
| 5654 | if (!NRVOCandidate) |
| 5655 | NRVOCandidate = Returns[I]->getNRVOCandidate(); |
| 5656 | else if (NRVOCandidate != Returns[I]->getNRVOCandidate()) |
| 5657 | return; |
| 5658 | } |
| 5659 | |
| 5660 | if (NRVOCandidate) |
| 5661 | const_cast<VarDecl*>(NRVOCandidate)->setNRVOVariable(true); |
| 5662 | } |
| 5663 | |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 5664 | Decl *Sema::ActOnFinishFunctionBody(Decl *D, Stmt *BodyArg) { |
Douglas Gregor | e2c31ff | 2009-05-15 17:59:04 +0000 | [diff] [blame] | 5665 | return ActOnFinishFunctionBody(D, move(BodyArg), false); |
| 5666 | } |
| 5667 | |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 5668 | Decl *Sema::ActOnFinishFunctionBody(Decl *dcl, Stmt *Body, |
| 5669 | bool IsInstantiation) { |
Douglas Gregor | d83d040 | 2009-08-22 00:34:47 +0000 | [diff] [blame] | 5670 | FunctionDecl *FD = 0; |
| 5671 | FunctionTemplateDecl *FunTmpl = dyn_cast_or_null<FunctionTemplateDecl>(dcl); |
| 5672 | if (FunTmpl) |
| 5673 | FD = FunTmpl->getTemplatedDecl(); |
| 5674 | else |
| 5675 | FD = dyn_cast_or_null<FunctionDecl>(dcl); |
| 5676 | |
Ted Kremenek | d064fdc | 2010-03-23 00:13:23 +0000 | [diff] [blame] | 5677 | sema::AnalysisBasedWarnings::Policy WP = AnalysisWarnings.getDefaultPolicy(); |
Ted Kremenek | 3ed6fc0 | 2011-02-23 01:51:48 +0000 | [diff] [blame] | 5678 | sema::AnalysisBasedWarnings::Policy *ActivePolicy = 0; |
Ted Kremenek | dbdbaaf | 2010-03-20 21:06:02 +0000 | [diff] [blame] | 5679 | |
Douglas Gregor | d83d040 | 2009-08-22 00:34:47 +0000 | [diff] [blame] | 5680 | if (FD) { |
Chris Lattner | a5251fc | 2009-04-18 09:36:27 +0000 | [diff] [blame] | 5681 | FD->setBody(Body); |
Ted Kremenek | dbdbaaf | 2010-03-20 21:06:02 +0000 | [diff] [blame] | 5682 | if (FD->isMain()) { |
Mike Stump | 5f28a1e | 2009-07-24 02:49:01 +0000 | [diff] [blame] | 5683 | // C and C++ allow for main to automagically return 0. |
John McCall | 0cfeb63 | 2009-07-28 01:00:58 +0000 | [diff] [blame] | 5684 | // Implements C++ [basic.start.main]p5 and C99 5.1.2.2.3. |
| 5685 | FD->setHasImplicitReturnZero(true); |
Ted Kremenek | d064fdc | 2010-03-23 00:13:23 +0000 | [diff] [blame] | 5686 | WP.disableCheckFallThrough(); |
Ted Kremenek | dbdbaaf | 2010-03-20 21:06:02 +0000 | [diff] [blame] | 5687 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5688 | |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 5689 | if (!FD->isInvalidDecl()) { |
Douglas Gregor | e0762c9 | 2009-06-19 23:52:42 +0000 | [diff] [blame] | 5690 | DiagnoseUnusedParameters(FD->param_begin(), FD->param_end()); |
Argyrios Kyrtzidis | 3532fdd | 2010-11-17 23:11:54 +0000 | [diff] [blame] | 5691 | DiagnoseSizeOfParametersAndReturnValue(FD->param_begin(), FD->param_end(), |
| 5692 | FD->getResultType(), FD); |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 5693 | |
| 5694 | // If this is a constructor, we need a vtable. |
| 5695 | if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(FD)) |
| 5696 | MarkVTableUsed(FD->getLocation(), Constructor->getParent()); |
Douglas Gregor | 5077c38 | 2010-05-15 06:01:05 +0000 | [diff] [blame] | 5697 | |
John McCall | 781472f | 2010-08-25 08:40:02 +0000 | [diff] [blame] | 5698 | ComputeNRVO(Body, getCurFunction()); |
Douglas Gregor | 6fb745b | 2010-05-13 16:44:06 +0000 | [diff] [blame] | 5699 | } |
| 5700 | |
Argyrios Kyrtzidis | 53d0ea5 | 2008-06-28 06:07:14 +0000 | [diff] [blame] | 5701 | assert(FD == getCurFunctionDecl() && "Function parsing confused"); |
Steve Naroff | 394f3f4 | 2008-07-25 17:57:26 +0000 | [diff] [blame] | 5702 | } else if (ObjCMethodDecl *MD = dyn_cast_or_null<ObjCMethodDecl>(dcl)) { |
Chris Lattner | ffed163 | 2009-02-16 19:27:54 +0000 | [diff] [blame] | 5703 | assert(MD == getCurMethodDecl() && "Method parsing confused"); |
Chris Lattner | a5251fc | 2009-04-18 09:36:27 +0000 | [diff] [blame] | 5704 | MD->setBody(Body); |
Argyrios Kyrtzidis | 0fe5397 | 2011-01-03 22:33:06 +0000 | [diff] [blame] | 5705 | if (Body) |
| 5706 | MD->setEndLoc(Body->getLocEnd()); |
Argyrios Kyrtzidis | 3532fdd | 2010-11-17 23:11:54 +0000 | [diff] [blame] | 5707 | if (!MD->isInvalidDecl()) { |
Douglas Gregor | e0762c9 | 2009-06-19 23:52:42 +0000 | [diff] [blame] | 5708 | DiagnoseUnusedParameters(MD->param_begin(), MD->param_end()); |
Argyrios Kyrtzidis | 3532fdd | 2010-11-17 23:11:54 +0000 | [diff] [blame] | 5709 | DiagnoseSizeOfParametersAndReturnValue(MD->param_begin(), MD->param_end(), |
| 5710 | MD->getResultType(), MD); |
| 5711 | } |
Ted Kremenek | 8189cde | 2009-02-07 01:47:29 +0000 | [diff] [blame] | 5712 | } else { |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 5713 | return 0; |
Ted Kremenek | 8189cde | 2009-02-07 01:47:29 +0000 | [diff] [blame] | 5714 | } |
Douglas Gregor | e2c31ff | 2009-05-15 17:59:04 +0000 | [diff] [blame] | 5715 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5716 | // Verify and clean out per-function state. |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 5717 | if (Body) { |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 5718 | // C++ constructors that have function-try-blocks can't have return |
| 5719 | // statements in the handlers of that block. (C++ [except.handle]p14) |
| 5720 | // Verify this. |
| 5721 | if (FD && isa<CXXConstructorDecl>(FD) && isa<CXXTryStmt>(Body)) |
| 5722 | DiagnoseReturnInConstructorExceptionHandler(cast<CXXTryStmt>(Body)); |
| 5723 | |
Ted Kremenek | dbdbaaf | 2010-03-20 21:06:02 +0000 | [diff] [blame] | 5724 | // Verify that that gotos and switch cases don't jump into scopes illegally. |
| 5725 | // 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] | 5726 | if (getCurFunction()->NeedsScopeChecking() && |
John McCall | 8a2ca74 | 2010-05-20 07:13:26 +0000 | [diff] [blame] | 5727 | !dcl->isInvalidDecl() && |
John McCall | dae69ef | 2010-05-20 07:05:55 +0000 | [diff] [blame] | 5728 | !hasAnyErrorsInThisFunction()) |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 5729 | DiagnoseInvalidJumps(Body); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5730 | |
John McCall | 1544282 | 2010-08-04 01:04:25 +0000 | [diff] [blame] | 5731 | if (CXXDestructorDecl *Destructor = dyn_cast<CXXDestructorDecl>(dcl)) { |
| 5732 | if (!Destructor->getParent()->isDependentType()) |
| 5733 | CheckDestructor(Destructor); |
| 5734 | |
John McCall | ef027fe | 2010-03-16 21:39:52 +0000 | [diff] [blame] | 5735 | MarkBaseAndMemberDestructorsReferenced(Destructor->getLocation(), |
| 5736 | Destructor->getParent()); |
John McCall | 1544282 | 2010-08-04 01:04:25 +0000 | [diff] [blame] | 5737 | } |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 5738 | |
| 5739 | // If any errors have occurred, clear out any temporaries that may have |
| 5740 | // been leftover. This ensures that these temporaries won't be picked up for |
| 5741 | // deletion in some later function. |
Douglas Gregor | 26cd44d | 2011-03-04 23:08:02 +0000 | [diff] [blame] | 5742 | if (PP.getDiagnostics().hasErrorOccurred() || |
| 5743 | PP.getDiagnostics().getSuppressAllDiagnostics()) |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 5744 | ExprTemporaries.clear(); |
Ted Kremenek | dbdbaaf | 2010-03-20 21:06:02 +0000 | [diff] [blame] | 5745 | else if (!isa<FunctionTemplateDecl>(dcl)) { |
| 5746 | // Since the body is valid, issue any analysis-based warnings that are |
| 5747 | // enabled. |
Ted Kremenek | 3ed6fc0 | 2011-02-23 01:51:48 +0000 | [diff] [blame] | 5748 | ActivePolicy = &WP; |
Ted Kremenek | dbdbaaf | 2010-03-20 21:06:02 +0000 | [diff] [blame] | 5749 | } |
| 5750 | |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 5751 | assert(ExprTemporaries.empty() && "Leftover temporaries in function"); |
| 5752 | } |
| 5753 | |
John McCall | 90f9789 | 2010-03-25 22:08:03 +0000 | [diff] [blame] | 5754 | if (!IsInstantiation) |
| 5755 | PopDeclContext(); |
| 5756 | |
Ted Kremenek | 3ed6fc0 | 2011-02-23 01:51:48 +0000 | [diff] [blame] | 5757 | PopFunctionOrBlockScope(ActivePolicy, dcl); |
Anders Carlsson | f8a9a79 | 2009-11-13 19:21:49 +0000 | [diff] [blame] | 5758 | |
Douglas Gregor | d5b5728 | 2009-11-15 07:07:58 +0000 | [diff] [blame] | 5759 | // If any errors have occurred, clear out any temporaries that may have |
| 5760 | // been leftover. This ensures that these temporaries won't be picked up for |
| 5761 | // deletion in some later function. |
Chris Lattner | 6d97e5e | 2010-03-01 20:59:53 +0000 | [diff] [blame] | 5762 | if (getDiagnostics().hasErrorOccurred()) |
Douglas Gregor | d5b5728 | 2009-11-15 07:07:58 +0000 | [diff] [blame] | 5763 | ExprTemporaries.clear(); |
Argyrios Kyrtzidis | 49b96d1 | 2010-08-13 18:42:17 +0000 | [diff] [blame] | 5764 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 5765 | return dcl; |
Fariborz Jahanian | 60fbca0 | 2007-11-10 16:31:34 +0000 | [diff] [blame] | 5766 | } |
| 5767 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5768 | /// ImplicitlyDefineFunction - An undeclared identifier was used in a function |
| 5769 | /// 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] | 5770 | NamedDecl *Sema::ImplicitlyDefineFunction(SourceLocation Loc, |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 5771 | IdentifierInfo &II, Scope *S) { |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 5772 | // Before we produce a declaration for an implicitly defined |
| 5773 | // function, see whether there was a locally-scoped declaration of |
| 5774 | // this name as a function or variable. If so, use that |
| 5775 | // (non-visible) declaration, and complain about it. |
| 5776 | llvm::DenseMap<DeclarationName, NamedDecl *>::iterator Pos |
| 5777 | = LocallyScopedExternalDecls.find(&II); |
| 5778 | if (Pos != LocallyScopedExternalDecls.end()) { |
| 5779 | Diag(Loc, diag::warn_use_out_of_scope_declaration) << Pos->second; |
| 5780 | Diag(Pos->second->getLocation(), diag::note_previous_declaration); |
| 5781 | return Pos->second; |
| 5782 | } |
| 5783 | |
Chris Lattner | 37d1084 | 2008-05-05 21:18:06 +0000 | [diff] [blame] | 5784 | // Extension in C99. Legal in C90, but warn about it. |
Daniel Dunbar | 01eb9b9 | 2009-10-18 21:17:35 +0000 | [diff] [blame] | 5785 | if (II.getName().startswith("__builtin_")) |
Douglas Gregor | 9a8c9a2 | 2009-09-28 21:14:19 +0000 | [diff] [blame] | 5786 | Diag(Loc, diag::warn_builtin_unknown) << &II; |
| 5787 | else if (getLangOptions().C99) |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 5788 | Diag(Loc, diag::ext_implicit_function_decl) << &II; |
Chris Lattner | 37d1084 | 2008-05-05 21:18:06 +0000 | [diff] [blame] | 5789 | else |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 5790 | Diag(Loc, diag::warn_implicit_function_decl) << &II; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5791 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5792 | // Set a Declarator for the implicit definition: int foo(); |
| 5793 | const char *Dummy; |
| 5794 | DeclSpec DS; |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 5795 | unsigned DiagID; |
| 5796 | bool Error = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, Dummy, DiagID); |
Jeffrey Yasskin | c6ed729 | 2010-12-23 01:01:28 +0000 | [diff] [blame] | 5797 | (void)Error; // Silence warning. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5798 | assert(!Error && "Error setting up implicit decl!"); |
| 5799 | Declarator D(DS, Declarator::BlockContext); |
John McCall | 7f040a9 | 2010-12-24 02:08:15 +0000 | [diff] [blame] | 5800 | D.AddTypeInfo(DeclaratorChunk::getFunction(ParsedAttributes(), |
| 5801 | false, false, SourceLocation(), 0, |
Douglas Gregor | 83f5172 | 2011-01-26 03:43:54 +0000 | [diff] [blame] | 5802 | 0, 0, true, SourceLocation(), |
Sebastian Redl | 6e5d319 | 2011-03-05 22:42:13 +0000 | [diff] [blame] | 5803 | EST_None, SourceLocation(), |
| 5804 | 0, 0, 0, 0, Loc, Loc, D), |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 5805 | SourceLocation()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5806 | D.SetIdentifier(&II, Loc); |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 5807 | |
Argyrios Kyrtzidis | 93213bb | 2008-05-01 21:04:16 +0000 | [diff] [blame] | 5808 | // Insert this function into translation-unit scope. |
| 5809 | |
| 5810 | DeclContext *PrevDC = CurContext; |
| 5811 | CurContext = Context.getTranslationUnitDecl(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5812 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 5813 | FunctionDecl *FD = dyn_cast<FunctionDecl>(ActOnDeclarator(TUScope, D)); |
Steve Naroff | e2ef815 | 2008-04-04 14:32:09 +0000 | [diff] [blame] | 5814 | FD->setImplicit(); |
Argyrios Kyrtzidis | 93213bb | 2008-05-01 21:04:16 +0000 | [diff] [blame] | 5815 | |
| 5816 | CurContext = PrevDC; |
| 5817 | |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 5818 | AddKnownFunctionAttributes(FD); |
| 5819 | |
Steve Naroff | e2ef815 | 2008-04-04 14:32:09 +0000 | [diff] [blame] | 5820 | return FD; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5821 | } |
| 5822 | |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 5823 | /// \brief Adds any function attributes that we know a priori based on |
| 5824 | /// the declaration of this function. |
| 5825 | /// |
| 5826 | /// These attributes can apply both to implicitly-declared builtins |
| 5827 | /// (like __builtin___printf_chk) or to library-declared functions |
| 5828 | /// like NSLog or printf. |
| 5829 | void Sema::AddKnownFunctionAttributes(FunctionDecl *FD) { |
| 5830 | if (FD->isInvalidDecl()) |
| 5831 | return; |
| 5832 | |
| 5833 | // If this is a built-in function, map its builtin attributes to |
| 5834 | // actual attributes. |
Douglas Gregor | 7814e6d | 2009-09-12 00:22:50 +0000 | [diff] [blame] | 5835 | if (unsigned BuiltinID = FD->getBuiltinID()) { |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 5836 | // Handle printf-formatting attributes. |
| 5837 | unsigned FormatIdx; |
| 5838 | bool HasVAListArg; |
| 5839 | if (Context.BuiltinInfo.isPrintfLike(BuiltinID, FormatIdx, HasVAListArg)) { |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 5840 | if (!FD->getAttr<FormatAttr>()) |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 5841 | FD->addAttr(::new (Context) FormatAttr(FD->getLocation(), Context, |
| 5842 | "printf", FormatIdx+1, |
Ted Kremenek | 3d2c43e | 2010-02-11 05:28:37 +0000 | [diff] [blame] | 5843 | HasVAListArg ? 0 : FormatIdx+2)); |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 5844 | } |
Ted Kremenek | bee05c1 | 2010-07-16 02:11:15 +0000 | [diff] [blame] | 5845 | if (Context.BuiltinInfo.isScanfLike(BuiltinID, FormatIdx, |
| 5846 | HasVAListArg)) { |
| 5847 | if (!FD->getAttr<FormatAttr>()) |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 5848 | FD->addAttr(::new (Context) FormatAttr(FD->getLocation(), Context, |
| 5849 | "scanf", FormatIdx+1, |
Ted Kremenek | bee05c1 | 2010-07-16 02:11:15 +0000 | [diff] [blame] | 5850 | HasVAListArg ? 0 : FormatIdx+2)); |
| 5851 | } |
Daniel Dunbar | ef2abfe | 2009-02-16 22:43:43 +0000 | [diff] [blame] | 5852 | |
| 5853 | // Mark const if we don't care about errno and that is the only |
| 5854 | // thing preventing the function from being const. This allows |
| 5855 | // IRgen to use LLVM intrinsics for such functions. |
| 5856 | if (!getLangOptions().MathErrno && |
| 5857 | Context.BuiltinInfo.isConstWithoutErrno(BuiltinID)) { |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 5858 | if (!FD->getAttr<ConstAttr>()) |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 5859 | FD->addAttr(::new (Context) ConstAttr(FD->getLocation(), Context)); |
Daniel Dunbar | ef2abfe | 2009-02-16 22:43:43 +0000 | [diff] [blame] | 5860 | } |
Mike Stump | 0feecbb | 2009-07-27 19:14:18 +0000 | [diff] [blame] | 5861 | |
Chris Lattner | 551f708 | 2009-12-30 22:06:22 +0000 | [diff] [blame] | 5862 | if (Context.BuiltinInfo.isNoThrow(BuiltinID)) |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 5863 | FD->addAttr(::new (Context) NoThrowAttr(FD->getLocation(), Context)); |
Chris Lattner | 551f708 | 2009-12-30 22:06:22 +0000 | [diff] [blame] | 5864 | if (Context.BuiltinInfo.isConst(BuiltinID)) |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 5865 | FD->addAttr(::new (Context) ConstAttr(FD->getLocation(), Context)); |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 5866 | } |
| 5867 | |
| 5868 | IdentifierInfo *Name = FD->getIdentifier(); |
| 5869 | if (!Name) |
| 5870 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5871 | if ((!getLangOptions().CPlusPlus && |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 5872 | FD->getDeclContext()->isTranslationUnit()) || |
| 5873 | (isa<LinkageSpecDecl>(FD->getDeclContext()) && |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5874 | cast<LinkageSpecDecl>(FD->getDeclContext())->getLanguage() == |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 5875 | LinkageSpecDecl::lang_c)) { |
| 5876 | // Okay: this could be a libc/libm/Objective-C function we know |
| 5877 | // about. |
| 5878 | } else |
| 5879 | return; |
| 5880 | |
Douglas Gregor | 21e072b | 2009-04-22 20:56:09 +0000 | [diff] [blame] | 5881 | if (Name->isStr("NSLog") || Name->isStr("NSLogv")) { |
Mike Stump | 523a8fd | 2009-07-28 00:07:08 +0000 | [diff] [blame] | 5882 | // FIXME: NSLog and NSLogv should be target specific |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 5883 | if (const FormatAttr *Format = FD->getAttr<FormatAttr>()) { |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 5884 | // FIXME: We known better than our headers. |
Ted Kremenek | 3d2c43e | 2010-02-11 05:28:37 +0000 | [diff] [blame] | 5885 | const_cast<FormatAttr *>(Format)->setType(Context, "printf"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5886 | } else |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 5887 | FD->addAttr(::new (Context) FormatAttr(FD->getLocation(), Context, |
| 5888 | "printf", 1, |
Eli Friedman | d7dad72 | 2009-06-10 04:01:38 +0000 | [diff] [blame] | 5889 | Name->isStr("NSLogv") ? 0 : 2)); |
Douglas Gregor | 21e072b | 2009-04-22 20:56:09 +0000 | [diff] [blame] | 5890 | } else if (Name->isStr("asprintf") || Name->isStr("vasprintf")) { |
Mike Stump | 523a8fd | 2009-07-28 00:07:08 +0000 | [diff] [blame] | 5891 | // FIXME: asprintf and vasprintf aren't C99 functions. Should they be |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5892 | // target-specific builtins, perhaps? |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 5893 | if (!FD->getAttr<FormatAttr>()) |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 5894 | FD->addAttr(::new (Context) FormatAttr(FD->getLocation(), Context, |
| 5895 | "printf", 2, |
Eli Friedman | d7dad72 | 2009-06-10 04:01:38 +0000 | [diff] [blame] | 5896 | Name->isStr("vasprintf") ? 0 : 3)); |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 5897 | } |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 5898 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5899 | |
John McCall | ba6a9bd | 2009-10-24 08:00:42 +0000 | [diff] [blame] | 5900 | TypedefDecl *Sema::ParseTypedefDecl(Scope *S, Declarator &D, QualType T, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 5901 | TypeSourceInfo *TInfo) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5902 | assert(D.getIdentifier() && "Wrong callback for declspec without declarator"); |
Steve Naroff | 5912a35 | 2007-08-28 20:14:24 +0000 | [diff] [blame] | 5903 | assert(!T.isNull() && "GetTypeForDeclarator() returned null type"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5904 | |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 5905 | if (!TInfo) { |
John McCall | ba6a9bd | 2009-10-24 08:00:42 +0000 | [diff] [blame] | 5906 | assert(D.isInvalidType() && "no declarator info for valid type"); |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 5907 | TInfo = Context.getTrivialTypeSourceInfo(T); |
John McCall | ba6a9bd | 2009-10-24 08:00:42 +0000 | [diff] [blame] | 5908 | } |
| 5909 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5910 | // Scope manipulation handled by caller. |
Chris Lattner | 0ed844b | 2008-04-04 06:12:32 +0000 | [diff] [blame] | 5911 | TypedefDecl *NewTD = TypedefDecl::Create(Context, CurContext, |
Abramo Bagnara | 344577e | 2011-03-06 15:48:19 +0000 | [diff] [blame] | 5912 | D.getSourceRange().getBegin(), |
Chris Lattner | 0ed844b | 2008-04-04 06:12:32 +0000 | [diff] [blame] | 5913 | D.getIdentifierLoc(), |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5914 | D.getIdentifier(), |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 5915 | TInfo); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5916 | |
John McCall | cde5a40 | 2011-02-01 08:20:08 +0000 | [diff] [blame] | 5917 | // Bail out immediately if we have an invalid declaration. |
| 5918 | if (D.isInvalidType()) { |
| 5919 | NewTD->setInvalidDecl(); |
| 5920 | return NewTD; |
Anders Carlsson | 4843e58 | 2009-03-10 17:07:44 +0000 | [diff] [blame] | 5921 | } |
| 5922 | |
John McCall | cde5a40 | 2011-02-01 08:20:08 +0000 | [diff] [blame] | 5923 | // C++ [dcl.typedef]p8: |
| 5924 | // If the typedef declaration defines an unnamed class (or |
| 5925 | // enum), the first typedef-name declared by the declaration |
| 5926 | // to be that class type (or enum type) is used to denote the |
| 5927 | // class type (or enum type) for linkage purposes only. |
| 5928 | // We need to check whether the type was declared in the declaration. |
| 5929 | switch (D.getDeclSpec().getTypeSpecType()) { |
| 5930 | case TST_enum: |
| 5931 | case TST_struct: |
| 5932 | case TST_union: |
| 5933 | case TST_class: { |
| 5934 | TagDecl *tagFromDeclSpec = cast<TagDecl>(D.getDeclSpec().getRepAsDecl()); |
| 5935 | |
| 5936 | // Do nothing if the tag is not anonymous or already has an |
| 5937 | // associated typedef (from an earlier typedef in this decl group). |
| 5938 | if (tagFromDeclSpec->getIdentifier()) break; |
| 5939 | if (tagFromDeclSpec->getTypedefForAnonDecl()) break; |
| 5940 | |
| 5941 | // A well-formed anonymous tag must always be a TUK_Definition. |
| 5942 | assert(tagFromDeclSpec->isThisDeclarationADefinition()); |
| 5943 | |
| 5944 | // The type must match the tag exactly; no qualifiers allowed. |
| 5945 | if (!Context.hasSameType(T, Context.getTagDeclType(tagFromDeclSpec))) |
| 5946 | break; |
| 5947 | |
| 5948 | // Otherwise, set this is the anon-decl typedef for the tag. |
| 5949 | tagFromDeclSpec->setTypedefForAnonDecl(NewTD); |
| 5950 | break; |
| 5951 | } |
| 5952 | |
| 5953 | default: |
| 5954 | break; |
| 5955 | } |
| 5956 | |
Steve Naroff | 5912a35 | 2007-08-28 20:14:24 +0000 | [diff] [blame] | 5957 | return NewTD; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5958 | } |
| 5959 | |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 5960 | |
| 5961 | /// \brief Determine whether a tag with a given kind is acceptable |
| 5962 | /// as a redeclaration of the given tag declaration. |
| 5963 | /// |
| 5964 | /// \returns true if the new tag kind is acceptable, false otherwise. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5965 | bool Sema::isAcceptableTagRedeclaration(const TagDecl *Previous, |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 5966 | TagTypeKind NewTag, |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 5967 | SourceLocation NewTagLoc, |
| 5968 | const IdentifierInfo &Name) { |
| 5969 | // C++ [dcl.type.elab]p3: |
| 5970 | // The class-key or enum keyword present in the |
| 5971 | // elaborated-type-specifier shall agree in kind with the |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 5972 | // declaration to which the name in the elaborated-type-specifier |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 5973 | // refers. This rule also applies to the form of |
| 5974 | // elaborated-type-specifier that declares a class-name or |
| 5975 | // friend class since it can be construed as referring to the |
| 5976 | // definition of the class. Thus, in any |
| 5977 | // elaborated-type-specifier, the enum keyword shall be used to |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 5978 | // refer to an enumeration (7.2), the union class-key shall be |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 5979 | // used to refer to a union (clause 9), and either the class or |
| 5980 | // struct class-key shall be used to refer to a class (clause 9) |
| 5981 | // declared using the class or struct class-key. |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 5982 | TagTypeKind OldTag = Previous->getTagKind(); |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 5983 | if (OldTag == NewTag) |
| 5984 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5985 | |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 5986 | if ((OldTag == TTK_Struct || OldTag == TTK_Class) && |
| 5987 | (NewTag == TTK_Struct || NewTag == TTK_Class)) { |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 5988 | // Warn about the struct/class tag mismatch. |
| 5989 | bool isTemplate = false; |
| 5990 | if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(Previous)) |
| 5991 | isTemplate = Record->getDescribedClassTemplate(); |
| 5992 | |
| 5993 | Diag(NewTagLoc, diag::warn_struct_class_tag_mismatch) |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 5994 | << (NewTag == TTK_Class) |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 5995 | << isTemplate << &Name |
Douglas Gregor | 849b243 | 2010-03-31 17:46:05 +0000 | [diff] [blame] | 5996 | << FixItHint::CreateReplacement(SourceRange(NewTagLoc), |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 5997 | OldTag == TTK_Class? "class" : "struct"); |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 5998 | Diag(Previous->getLocation(), diag::note_previous_use); |
| 5999 | return true; |
| 6000 | } |
| 6001 | return false; |
| 6002 | } |
| 6003 | |
Steve Naroff | 08d92e4 | 2007-09-15 18:49:24 +0000 | [diff] [blame] | 6004 | /// 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] | 6005 | /// 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] | 6006 | /// 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] | 6007 | /// reference/declaration/definition of a tag. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6008 | Decl *Sema::ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, |
Douglas Gregor | 069ea64 | 2010-09-16 23:58:57 +0000 | [diff] [blame] | 6009 | SourceLocation KWLoc, CXXScopeSpec &SS, |
| 6010 | IdentifierInfo *Name, SourceLocation NameLoc, |
| 6011 | AttributeList *Attr, AccessSpecifier AS, |
| 6012 | MultiTemplateParamsArg TemplateParameterLists, |
Abramo Bagnara | a88cefd | 2010-12-03 18:54:17 +0000 | [diff] [blame] | 6013 | bool &OwnedDecl, bool &IsDependent, |
| 6014 | bool ScopedEnum, bool ScopedEnumUsesClassTag, |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 6015 | TypeResult UnderlyingType) { |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6016 | // If this is not a definition, it must have a name. |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 6017 | assert((Name != 0 || TUK == TUK_Definition) && |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6018 | "Nameless record must be a definition!"); |
John McCall | 9a34edb | 2010-10-19 01:40:49 +0000 | [diff] [blame] | 6019 | assert(TemplateParameterLists.size() == 0 || TUK != TUK_Reference); |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 6020 | |
Douglas Gregor | 402abb5 | 2009-05-28 23:31:59 +0000 | [diff] [blame] | 6021 | OwnedDecl = false; |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 6022 | TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6023 | |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 6024 | // FIXME: Check explicit specializations more carefully. |
| 6025 | bool isExplicitSpecialization = false; |
Abramo Bagnara | 9b93488 | 2010-06-12 08:15:14 +0000 | [diff] [blame] | 6026 | unsigned NumMatchedTemplateParamLists = TemplateParameterLists.size(); |
Douglas Gregor | 0167f3c | 2010-07-14 23:14:12 +0000 | [diff] [blame] | 6027 | bool Invalid = false; |
John McCall | 9a34edb | 2010-10-19 01:40:49 +0000 | [diff] [blame] | 6028 | |
| 6029 | // We only need to do this matching if we have template parameters |
| 6030 | // or a scope specifier, which also conveniently avoids this work |
| 6031 | // for non-C++ cases. |
| 6032 | if (NumMatchedTemplateParamLists || |
| 6033 | (SS.isNotEmpty() && TUK != TUK_Reference)) { |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 6034 | if (TemplateParameterList *TemplateParams |
| 6035 | = MatchTemplateParametersToScopeSpecifier(KWLoc, SS, |
John McCall | be04b6d | 2010-10-16 07:23:36 +0000 | [diff] [blame] | 6036 | TemplateParameterLists.get(), |
| 6037 | TemplateParameterLists.size(), |
John McCall | 77e8b11 | 2010-04-13 20:37:33 +0000 | [diff] [blame] | 6038 | TUK == TUK_Friend, |
Douglas Gregor | 0167f3c | 2010-07-14 23:14:12 +0000 | [diff] [blame] | 6039 | isExplicitSpecialization, |
| 6040 | Invalid)) { |
Abramo Bagnara | 9b93488 | 2010-06-12 08:15:14 +0000 | [diff] [blame] | 6041 | // All but one template parameter lists have been matching. |
| 6042 | --NumMatchedTemplateParamLists; |
| 6043 | |
Douglas Gregor | d85bea2 | 2009-09-26 06:47:28 +0000 | [diff] [blame] | 6044 | if (TemplateParams->size() > 0) { |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 6045 | // This is a declaration or definition of a class template (which may |
| 6046 | // be a member of another template). |
Douglas Gregor | 0167f3c | 2010-07-14 23:14:12 +0000 | [diff] [blame] | 6047 | if (Invalid) |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6048 | return 0; |
Abramo Bagnara | c57c17d | 2011-03-10 13:28:31 +0000 | [diff] [blame] | 6049 | |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 6050 | OwnedDecl = false; |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 6051 | DeclResult Result = CheckClassTemplate(S, TagSpec, TUK, KWLoc, |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 6052 | SS, Name, NameLoc, Attr, |
Abramo Bagnara | c57c17d | 2011-03-10 13:28:31 +0000 | [diff] [blame] | 6053 | TemplateParams, AS, |
| 6054 | NumMatchedTemplateParamLists, |
| 6055 | (TemplateParameterList**) TemplateParameterLists.release()); |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 6056 | return Result.get(); |
| 6057 | } else { |
Douglas Gregor | f6b1185 | 2009-10-08 15:14:33 +0000 | [diff] [blame] | 6058 | // The "template<>" header is extraneous. |
| 6059 | Diag(TemplateParams->getTemplateLoc(), diag::err_template_tag_noparams) |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 6060 | << TypeWithKeyword::getTagTypeKindName(Kind) << Name; |
Douglas Gregor | f6b1185 | 2009-10-08 15:14:33 +0000 | [diff] [blame] | 6061 | isExplicitSpecialization = true; |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 6062 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6063 | } |
| 6064 | } |
| 6065 | |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 6066 | // Figure out the underlying type if this a enum declaration. We need to do |
| 6067 | // this early, because it's needed to detect if this is an incompatible |
| 6068 | // redeclaration. |
| 6069 | llvm::PointerUnion<const Type*, TypeSourceInfo*> EnumUnderlying; |
| 6070 | |
| 6071 | if (Kind == TTK_Enum) { |
| 6072 | if (UnderlyingType.isInvalid() || (!UnderlyingType.get() && ScopedEnum)) |
| 6073 | // No underlying type explicitly specified, or we failed to parse the |
| 6074 | // type, default to int. |
| 6075 | EnumUnderlying = Context.IntTy.getTypePtr(); |
| 6076 | else if (UnderlyingType.get()) { |
| 6077 | // C++0x 7.2p2: The type-specifier-seq of an enum-base shall name an |
| 6078 | // integral type; any cv-qualification is ignored. |
| 6079 | TypeSourceInfo *TI = 0; |
| 6080 | QualType T = GetTypeFromParser(UnderlyingType.get(), &TI); |
| 6081 | EnumUnderlying = TI; |
| 6082 | |
| 6083 | SourceLocation UnderlyingLoc = TI->getTypeLoc().getBeginLoc(); |
| 6084 | |
| 6085 | if (!T->isDependentType() && !T->isIntegralType(Context)) { |
| 6086 | Diag(UnderlyingLoc, diag::err_enum_invalid_underlying) |
| 6087 | << T; |
| 6088 | // Recover by falling back to int. |
| 6089 | EnumUnderlying = Context.IntTy.getTypePtr(); |
| 6090 | } |
Douglas Gregor | 0c9e479 | 2010-12-16 00:24:44 +0000 | [diff] [blame] | 6091 | |
| 6092 | if (DiagnoseUnexpandedParameterPack(UnderlyingLoc, TI, |
| 6093 | UPPC_FixedUnderlyingType)) |
| 6094 | EnumUnderlying = Context.IntTy.getTypePtr(); |
| 6095 | |
Francois Pichet | 842e7a2 | 2010-10-18 15:01:13 +0000 | [diff] [blame] | 6096 | } else if (getLangOptions().Microsoft) |
| 6097 | // Microsoft enums are always of int type. |
| 6098 | EnumUnderlying = Context.IntTy.getTypePtr(); |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 6099 | } |
| 6100 | |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 6101 | DeclContext *SearchDC = CurContext; |
Argyrios Kyrtzidis | 0f84a23 | 2008-11-09 22:53:32 +0000 | [diff] [blame] | 6102 | DeclContext *DC = CurContext; |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 6103 | bool isStdBadAlloc = false; |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 6104 | |
Chandler Carruth | 7bf3600 | 2010-03-01 21:17:36 +0000 | [diff] [blame] | 6105 | RedeclarationKind Redecl = ForRedeclaration; |
| 6106 | if (TUK == TUK_Friend || TUK == TUK_Reference) |
| 6107 | Redecl = NotForRedeclaration; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6108 | |
| 6109 | LookupResult Previous(*this, Name, NameLoc, LookupTagName, Redecl); |
John McCall | 6e24726 | 2009-10-10 05:48:19 +0000 | [diff] [blame] | 6110 | |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 6111 | if (Name && SS.isNotEmpty()) { |
| 6112 | // We have a nested-name tag ('struct foo::bar'). |
| 6113 | |
| 6114 | // Check for invalid 'foo::'. |
Argyrios Kyrtzidis | 0f84a23 | 2008-11-09 22:53:32 +0000 | [diff] [blame] | 6115 | if (SS.isInvalid()) { |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 6116 | Name = 0; |
| 6117 | goto CreateNewDecl; |
| 6118 | } |
| 6119 | |
John McCall | c4e7019 | 2009-09-11 04:59:25 +0000 | [diff] [blame] | 6120 | // If this is a friend or a reference to a class in a dependent |
| 6121 | // context, don't try to make a decl for it. |
| 6122 | if (TUK == TUK_Friend || TUK == TUK_Reference) { |
| 6123 | DC = computeDeclContext(SS, false); |
| 6124 | if (!DC) { |
| 6125 | IsDependent = true; |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6126 | return 0; |
John McCall | c4e7019 | 2009-09-11 04:59:25 +0000 | [diff] [blame] | 6127 | } |
John McCall | 77bb1aa | 2010-05-01 00:40:08 +0000 | [diff] [blame] | 6128 | } else { |
| 6129 | DC = computeDeclContext(SS, true); |
| 6130 | if (!DC) { |
| 6131 | Diag(SS.getRange().getBegin(), diag::err_dependent_nested_name_spec) |
| 6132 | << SS.getRange(); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6133 | return 0; |
John McCall | 77bb1aa | 2010-05-01 00:40:08 +0000 | [diff] [blame] | 6134 | } |
John McCall | c4e7019 | 2009-09-11 04:59:25 +0000 | [diff] [blame] | 6135 | } |
| 6136 | |
John McCall | 77bb1aa | 2010-05-01 00:40:08 +0000 | [diff] [blame] | 6137 | if (RequireCompleteDeclContext(SS, DC)) |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6138 | return 0; |
Douglas Gregor | 3f5b61c | 2009-05-14 00:28:11 +0000 | [diff] [blame] | 6139 | |
Douglas Gregor | 1931b44 | 2009-02-03 00:34:39 +0000 | [diff] [blame] | 6140 | SearchDC = DC; |
Argyrios Kyrtzidis | 0f84a23 | 2008-11-09 22:53:32 +0000 | [diff] [blame] | 6141 | // Look-up name inside 'foo::'. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6142 | LookupQualifiedName(Previous, DC); |
John McCall | 6e24726 | 2009-10-10 05:48:19 +0000 | [diff] [blame] | 6143 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6144 | if (Previous.isAmbiguous()) |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6145 | return 0; |
John McCall | 6e24726 | 2009-10-10 05:48:19 +0000 | [diff] [blame] | 6146 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6147 | if (Previous.empty()) { |
Douglas Gregor | 9edad9b | 2010-01-14 17:47:39 +0000 | [diff] [blame] | 6148 | // Name lookup did not find anything. However, if the |
| 6149 | // nested-name-specifier refers to the current instantiation, |
| 6150 | // and that current instantiation has any dependent base |
| 6151 | // classes, we might find something at instantiation time: treat |
| 6152 | // this as a dependent elaborated-type-specifier. |
John McCall | 9a34edb | 2010-10-19 01:40:49 +0000 | [diff] [blame] | 6153 | // But this only makes any sense for reference-like lookups. |
| 6154 | if (Previous.wasNotFoundInCurrentInstantiation() && |
| 6155 | (TUK == TUK_Reference || TUK == TUK_Friend)) { |
Douglas Gregor | 9edad9b | 2010-01-14 17:47:39 +0000 | [diff] [blame] | 6156 | IsDependent = true; |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6157 | return 0; |
Douglas Gregor | 9edad9b | 2010-01-14 17:47:39 +0000 | [diff] [blame] | 6158 | } |
| 6159 | |
| 6160 | // A tag 'foo::bar' must already exist. |
Douglas Gregor | 1eabb7d | 2010-03-31 23:17:41 +0000 | [diff] [blame] | 6161 | Diag(NameLoc, diag::err_not_tag_in_scope) |
| 6162 | << Kind << Name << DC << SS.getRange(); |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 6163 | Name = 0; |
Douglas Gregor | d0c8737 | 2009-05-27 17:30:49 +0000 | [diff] [blame] | 6164 | Invalid = true; |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 6165 | goto CreateNewDecl; |
| 6166 | } |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 6167 | } else if (Name) { |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 6168 | // If this is a named struct, check to see if there was a previous forward |
| 6169 | // declaration or definition. |
Douglas Gregor | 2a3009a | 2009-02-03 19:21:40 +0000 | [diff] [blame] | 6170 | // FIXME: We're looking into outer scopes here, even when we |
| 6171 | // shouldn't be. Doing so can result in ambiguities that we |
| 6172 | // shouldn't be diagnosing. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6173 | LookupName(Previous, S); |
| 6174 | |
| 6175 | // Note: there used to be some attempt at recovery here. |
| 6176 | if (Previous.isAmbiguous()) |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6177 | return 0; |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 6178 | |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 6179 | if (!getLangOptions().CPlusPlus && TUK != TUK_Reference) { |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 6180 | // FIXME: This makes sure that we ignore the contexts associated |
| 6181 | // with C structs, unions, and enums when looking for a matching |
| 6182 | // tag declaration or definition. See the similar lookup tweak |
Douglas Gregor | 4c921ae | 2009-01-30 01:04:22 +0000 | [diff] [blame] | 6183 | // in Sema::LookupName; is there a better way to deal with this? |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 6184 | while (isa<RecordDecl>(SearchDC) || isa<EnumDecl>(SearchDC)) |
| 6185 | SearchDC = SearchDC->getParent(); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 6186 | } |
Douglas Gregor | 069ea64 | 2010-09-16 23:58:57 +0000 | [diff] [blame] | 6187 | } else if (S->isFunctionPrototypeScope()) { |
| 6188 | // If this is an enum declaration in function prototype scope, set its |
| 6189 | // initial context to the translation unit. |
| 6190 | SearchDC = Context.getTranslationUnitDecl(); |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 6191 | } |
| 6192 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6193 | if (Previous.isSingleResult() && |
| 6194 | Previous.getFoundDecl()->isTemplateParameter()) { |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 6195 | // Maybe we will complain about the shadowed template parameter. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6196 | DiagnoseTemplateParameterShadow(NameLoc, Previous.getFoundDecl()); |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 6197 | // Just pretend that we didn't see the previous declaration. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6198 | Previous.clear(); |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 6199 | } |
| 6200 | |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 6201 | if (getLangOptions().CPlusPlus && Name && DC && StdNamespace && |
Argyrios Kyrtzidis | 76c38d3 | 2010-08-02 07:14:54 +0000 | [diff] [blame] | 6202 | DC->Equals(getStdNamespace()) && Name->isStr("bad_alloc")) { |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 6203 | // This is a declaration of or a reference to "std::bad_alloc". |
| 6204 | isStdBadAlloc = true; |
| 6205 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6206 | if (Previous.empty() && StdBadAlloc) { |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 6207 | // std::bad_alloc has been implicitly declared (but made invisible to |
| 6208 | // name lookup). Fill in this implicit declaration as the previous |
| 6209 | // declaration, so that the declarations get chained appropriately. |
Argyrios Kyrtzidis | 76c38d3 | 2010-08-02 07:14:54 +0000 | [diff] [blame] | 6210 | Previous.addDecl(getStdBadAlloc()); |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 6211 | } |
| 6212 | } |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6213 | |
John McCall | 9c86b51 | 2010-03-25 21:28:06 +0000 | [diff] [blame] | 6214 | // If we didn't find a previous declaration, and this is a reference |
| 6215 | // (or friend reference), move to the correct scope. In C++, we |
| 6216 | // also need to do a redeclaration lookup there, just in case |
| 6217 | // there's a shadow friend decl. |
| 6218 | if (Name && Previous.empty() && |
| 6219 | (TUK == TUK_Reference || TUK == TUK_Friend)) { |
| 6220 | if (Invalid) goto CreateNewDecl; |
| 6221 | assert(SS.isEmpty()); |
| 6222 | |
| 6223 | if (TUK == TUK_Reference) { |
| 6224 | // C++ [basic.scope.pdecl]p5: |
| 6225 | // -- for an elaborated-type-specifier of the form |
| 6226 | // |
| 6227 | // class-key identifier |
| 6228 | // |
| 6229 | // if the elaborated-type-specifier is used in the |
| 6230 | // decl-specifier-seq or parameter-declaration-clause of a |
| 6231 | // function defined in namespace scope, the identifier is |
| 6232 | // declared as a class-name in the namespace that contains |
| 6233 | // the declaration; otherwise, except as a friend |
| 6234 | // declaration, the identifier is declared in the smallest |
| 6235 | // non-class, non-function-prototype scope that contains the |
| 6236 | // declaration. |
| 6237 | // |
| 6238 | // C99 6.7.2.3p8 has a similar (but not identical!) provision for |
| 6239 | // C structs and unions. |
| 6240 | // |
| 6241 | // It is an error in C++ to declare (rather than define) an enum |
| 6242 | // type, including via an elaborated type specifier. We'll |
| 6243 | // diagnose that later; for now, declare the enum in the same |
| 6244 | // scope as we would have picked for any other tag type. |
| 6245 | // |
| 6246 | // GNU C also supports this behavior as part of its incomplete |
| 6247 | // enum types extension, while GNU C++ does not. |
| 6248 | // |
| 6249 | // Find the context where we'll be declaring the tag. |
| 6250 | // FIXME: We would like to maintain the current DeclContext as the |
| 6251 | // lexical context, |
Rafael Espindola | 706df2f | 2011-01-20 02:26:24 +0000 | [diff] [blame] | 6252 | while (SearchDC->isRecord() || SearchDC->isTransparentContext()) |
John McCall | 9c86b51 | 2010-03-25 21:28:06 +0000 | [diff] [blame] | 6253 | SearchDC = SearchDC->getParent(); |
| 6254 | |
| 6255 | // Find the scope where we'll be declaring the tag. |
| 6256 | while (S->isClassScope() || |
| 6257 | (getLangOptions().CPlusPlus && |
| 6258 | S->isFunctionPrototypeScope()) || |
| 6259 | ((S->getFlags() & Scope::DeclScope) == 0) || |
| 6260 | (S->getEntity() && |
| 6261 | ((DeclContext *)S->getEntity())->isTransparentContext())) |
| 6262 | S = S->getParent(); |
| 6263 | } else { |
| 6264 | assert(TUK == TUK_Friend); |
| 6265 | // C++ [namespace.memdef]p3: |
| 6266 | // If a friend declaration in a non-local class first declares a |
| 6267 | // class or function, the friend class or function is a member of |
| 6268 | // the innermost enclosing namespace. |
| 6269 | SearchDC = SearchDC->getEnclosingNamespaceContext(); |
John McCall | 9c86b51 | 2010-03-25 21:28:06 +0000 | [diff] [blame] | 6270 | } |
| 6271 | |
John McCall | 0d6b164 | 2010-04-23 18:46:30 +0000 | [diff] [blame] | 6272 | // In C++, we need to do a redeclaration lookup to properly |
| 6273 | // diagnose some problems. |
John McCall | 9c86b51 | 2010-03-25 21:28:06 +0000 | [diff] [blame] | 6274 | if (getLangOptions().CPlusPlus) { |
| 6275 | Previous.setRedeclarationKind(ForRedeclaration); |
| 6276 | LookupQualifiedName(Previous, SearchDC); |
| 6277 | } |
| 6278 | } |
| 6279 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6280 | if (!Previous.empty()) { |
Douglas Gregor | 57265e3 | 2010-04-12 16:00:01 +0000 | [diff] [blame] | 6281 | NamedDecl *PrevDecl = (*Previous.begin())->getUnderlyingDecl(); |
John McCall | 0d6b164 | 2010-04-23 18:46:30 +0000 | [diff] [blame] | 6282 | |
| 6283 | // It's okay to have a tag decl in the same scope as a typedef |
| 6284 | // which hides a tag decl in the same scope. Finding this |
| 6285 | // insanity with a redeclaration lookup can only actually happen |
| 6286 | // in C++. |
| 6287 | // |
| 6288 | // This is also okay for elaborated-type-specifiers, which is |
| 6289 | // technically forbidden by the current standard but which is |
| 6290 | // okay according to the likely resolution of an open issue; |
| 6291 | // see http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#407 |
| 6292 | if (getLangOptions().CPlusPlus) { |
| 6293 | if (TypedefDecl *TD = dyn_cast<TypedefDecl>(PrevDecl)) { |
| 6294 | if (const TagType *TT = TD->getUnderlyingType()->getAs<TagType>()) { |
| 6295 | TagDecl *Tag = TT->getDecl(); |
| 6296 | if (Tag->getDeclName() == Name && |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 6297 | Tag->getDeclContext()->getRedeclContext() |
| 6298 | ->Equals(TD->getDeclContext()->getRedeclContext())) { |
John McCall | 0d6b164 | 2010-04-23 18:46:30 +0000 | [diff] [blame] | 6299 | PrevDecl = Tag; |
| 6300 | Previous.clear(); |
| 6301 | Previous.addDecl(Tag); |
Douglas Gregor | 757c600 | 2010-08-27 22:55:10 +0000 | [diff] [blame] | 6302 | Previous.resolveKind(); |
John McCall | 0d6b164 | 2010-04-23 18:46:30 +0000 | [diff] [blame] | 6303 | } |
| 6304 | } |
| 6305 | } |
| 6306 | } |
| 6307 | |
Argyrios Kyrtzidis | 2d1c5d3 | 2008-04-27 13:50:30 +0000 | [diff] [blame] | 6308 | if (TagDecl *PrevTagDecl = dyn_cast<TagDecl>(PrevDecl)) { |
Chris Lattner | 14943b9 | 2008-07-03 03:30:58 +0000 | [diff] [blame] | 6309 | // If this is a use of a previous tag, or if the tag is already declared |
| 6310 | // in the same scope (so that the definition/declaration completes or |
Argyrios Kyrtzidis | 2d1c5d3 | 2008-04-27 13:50:30 +0000 | [diff] [blame] | 6311 | // rementions the tag), reuse the decl. |
John McCall | 67d1a67 | 2009-08-06 02:15:43 +0000 | [diff] [blame] | 6312 | if (TUK == TUK_Reference || TUK == TUK_Friend || |
Douglas Gregor | cc20945 | 2011-03-07 16:54:27 +0000 | [diff] [blame] | 6313 | isDeclInScope(PrevDecl, SearchDC, S, isExplicitSpecialization)) { |
Chris Lattner | 14943b9 | 2008-07-03 03:30:58 +0000 | [diff] [blame] | 6314 | // Make sure that this wasn't declared as an enum and now used as a |
| 6315 | // struct or something similar. |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 6316 | if (!isAcceptableTagRedeclaration(PrevTagDecl, Kind, KWLoc, *Name)) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6317 | bool SafeToContinue |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 6318 | = (PrevTagDecl->getTagKind() != TTK_Enum && |
| 6319 | Kind != TTK_Enum); |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 6320 | if (SafeToContinue) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6321 | Diag(KWLoc, diag::err_use_with_wrong_tag) |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 6322 | << Name |
Douglas Gregor | 849b243 | 2010-03-31 17:46:05 +0000 | [diff] [blame] | 6323 | << FixItHint::CreateReplacement(SourceRange(KWLoc), |
| 6324 | PrevTagDecl->getKindName()); |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 6325 | else |
| 6326 | Diag(KWLoc, diag::err_use_with_wrong_tag) << Name; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6327 | Diag(PrevTagDecl->getLocation(), diag::note_previous_use); |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 6328 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6329 | if (SafeToContinue) |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 6330 | Kind = PrevTagDecl->getTagKind(); |
| 6331 | else { |
| 6332 | // Recover by making this an anonymous redefinition. |
| 6333 | Name = 0; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6334 | Previous.clear(); |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 6335 | Invalid = true; |
| 6336 | } |
| 6337 | } |
| 6338 | |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 6339 | if (Kind == TTK_Enum && PrevTagDecl->getTagKind() == TTK_Enum) { |
| 6340 | const EnumDecl *PrevEnum = cast<EnumDecl>(PrevTagDecl); |
| 6341 | |
| 6342 | // All conflicts with previous declarations are recovered by |
| 6343 | // returning the previous declaration. |
| 6344 | if (ScopedEnum != PrevEnum->isScoped()) { |
| 6345 | Diag(KWLoc, diag::err_enum_redeclare_scoped_mismatch) |
| 6346 | << PrevEnum->isScoped(); |
| 6347 | Diag(PrevTagDecl->getLocation(), diag::note_previous_use); |
| 6348 | return PrevTagDecl; |
| 6349 | } |
| 6350 | else if (EnumUnderlying && PrevEnum->isFixed()) { |
| 6351 | QualType T; |
| 6352 | if (TypeSourceInfo *TI = EnumUnderlying.dyn_cast<TypeSourceInfo*>()) |
| 6353 | T = TI->getType(); |
| 6354 | else |
| 6355 | T = QualType(EnumUnderlying.get<const Type*>(), 0); |
| 6356 | |
| 6357 | if (!Context.hasSameUnqualifiedType(T, PrevEnum->getIntegerType())) { |
Douglas Gregor | d11617f | 2010-12-01 16:10:38 +0000 | [diff] [blame] | 6358 | Diag(NameLoc.isValid() ? NameLoc : KWLoc, |
| 6359 | diag::err_enum_redeclare_type_mismatch) |
| 6360 | << T |
| 6361 | << PrevEnum->getIntegerType(); |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 6362 | Diag(PrevTagDecl->getLocation(), diag::note_previous_use); |
| 6363 | return PrevTagDecl; |
| 6364 | } |
| 6365 | } |
| 6366 | else if (!EnumUnderlying.isNull() != PrevEnum->isFixed()) { |
| 6367 | Diag(KWLoc, diag::err_enum_redeclare_fixed_mismatch) |
| 6368 | << PrevEnum->isFixed(); |
| 6369 | Diag(PrevTagDecl->getLocation(), diag::note_previous_use); |
| 6370 | return PrevTagDecl; |
| 6371 | } |
| 6372 | } |
| 6373 | |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 6374 | if (!Invalid) { |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6375 | // If this is a use, just return the declaration we found. |
Chris Lattner | 14943b9 | 2008-07-03 03:30:58 +0000 | [diff] [blame] | 6376 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6377 | // FIXME: In the future, return a variant or some other clue |
| 6378 | // for the consumer of this Decl to know it doesn't own it. |
| 6379 | // For our current ASTs this shouldn't be a problem, but will |
| 6380 | // need to be changed with DeclGroups. |
Douglas Gregor | e1aa9f3 | 2010-06-08 21:27:36 +0000 | [diff] [blame] | 6381 | if ((TUK == TUK_Reference && !PrevTagDecl->getFriendObjectKind()) || |
| 6382 | TUK == TUK_Friend) |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6383 | return PrevTagDecl; |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 6384 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6385 | // Diagnose attempts to redefine a tag. |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 6386 | if (TUK == TUK_Definition) { |
Douglas Gregor | 952b017 | 2010-02-11 01:04:33 +0000 | [diff] [blame] | 6387 | if (TagDecl *Def = PrevTagDecl->getDefinition()) { |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 6388 | // If we're defining a specialization and the previous definition |
| 6389 | // is from an implicit instantiation, don't emit an error |
| 6390 | // here; we'll catch this in the general case below. |
| 6391 | if (!isExplicitSpecialization || |
| 6392 | !isa<CXXRecordDecl>(Def) || |
| 6393 | cast<CXXRecordDecl>(Def)->getTemplateSpecializationKind() |
| 6394 | == TSK_ExplicitSpecialization) { |
| 6395 | Diag(NameLoc, diag::err_redefinition) << Name; |
| 6396 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 6397 | // If this is a redefinition, recover by making this |
| 6398 | // struct be anonymous, which will make any later |
| 6399 | // references get the previous definition. |
| 6400 | Name = 0; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6401 | Previous.clear(); |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 6402 | Invalid = true; |
| 6403 | } |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 6404 | } else { |
| 6405 | // If the type is currently being defined, complain |
| 6406 | // about a nested redefinition. |
John McCall | f4c7371 | 2011-01-19 06:33:43 +0000 | [diff] [blame] | 6407 | const TagType *Tag |
| 6408 | = cast<TagType>(Context.getTagDeclType(PrevTagDecl)); |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 6409 | if (Tag->isBeingDefined()) { |
| 6410 | Diag(NameLoc, diag::err_nested_redefinition) << Name; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6411 | Diag(PrevTagDecl->getLocation(), |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 6412 | diag::note_previous_definition); |
| 6413 | Name = 0; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6414 | Previous.clear(); |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 6415 | Invalid = true; |
| 6416 | } |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6417 | } |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 6418 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6419 | // Okay, this is definition of a previously declared or referenced |
| 6420 | // tag PrevDecl. We're going to create a new Decl for it. |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 6421 | } |
Argyrios Kyrtzidis | 2d1c5d3 | 2008-04-27 13:50:30 +0000 | [diff] [blame] | 6422 | } |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6423 | // If we get here we have (another) forward declaration or we |
John McCall | 67d1a67 | 2009-08-06 02:15:43 +0000 | [diff] [blame] | 6424 | // have a definition. Just create a new decl. |
| 6425 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6426 | } else { |
| 6427 | // 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] | 6428 | // scope, e.g. "struct foo; void bar() { struct foo; }", just create a |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6429 | // new decl/type. We set PrevDecl to NULL so that the entities |
| 6430 | // have distinct types. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6431 | Previous.clear(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6432 | } |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6433 | // If we get here, we're going to create a new Decl. If PrevDecl |
| 6434 | // is non-NULL, it's a definition of the tag declared by |
| 6435 | // PrevDecl. If it's NULL, we have a new definition. |
John McCall | 0d6b164 | 2010-04-23 18:46:30 +0000 | [diff] [blame] | 6436 | |
| 6437 | |
| 6438 | // Otherwise, PrevDecl is not a tag, but was found with tag |
| 6439 | // lookup. This is only actually possible in C++, where a few |
| 6440 | // things like templates still live in the tag namespace. |
Argyrios Kyrtzidis | 2d1c5d3 | 2008-04-27 13:50:30 +0000 | [diff] [blame] | 6441 | } else { |
John McCall | 0d6b164 | 2010-04-23 18:46:30 +0000 | [diff] [blame] | 6442 | assert(getLangOptions().CPlusPlus); |
| 6443 | |
| 6444 | // Use a better diagnostic if an elaborated-type-specifier |
| 6445 | // found the wrong kind of type on the first |
| 6446 | // (non-redeclaration) lookup. |
| 6447 | if ((TUK == TUK_Reference || TUK == TUK_Friend) && |
| 6448 | !Previous.isForRedeclaration()) { |
| 6449 | unsigned Kind = 0; |
| 6450 | if (isa<TypedefDecl>(PrevDecl)) Kind = 1; |
| 6451 | else if (isa<ClassTemplateDecl>(PrevDecl)) Kind = 2; |
| 6452 | Diag(NameLoc, diag::err_tag_reference_non_tag) << Kind; |
| 6453 | Diag(PrevDecl->getLocation(), diag::note_declared_at); |
| 6454 | Invalid = true; |
| 6455 | |
| 6456 | // Otherwise, only diagnose if the declaration is in scope. |
Douglas Gregor | cc20945 | 2011-03-07 16:54:27 +0000 | [diff] [blame] | 6457 | } else if (!isDeclInScope(PrevDecl, SearchDC, S, |
| 6458 | isExplicitSpecialization)) { |
John McCall | 0d6b164 | 2010-04-23 18:46:30 +0000 | [diff] [blame] | 6459 | // do nothing |
| 6460 | |
| 6461 | // Diagnose implicit declarations introduced by elaborated types. |
| 6462 | } else if (TUK == TUK_Reference || TUK == TUK_Friend) { |
| 6463 | unsigned Kind = 0; |
| 6464 | if (isa<TypedefDecl>(PrevDecl)) Kind = 1; |
| 6465 | else if (isa<ClassTemplateDecl>(PrevDecl)) Kind = 2; |
| 6466 | Diag(NameLoc, diag::err_tag_reference_conflict) << Kind; |
| 6467 | Diag(PrevDecl->getLocation(), diag::note_previous_decl) << PrevDecl; |
| 6468 | Invalid = true; |
| 6469 | |
| 6470 | // Otherwise it's a declaration. Call out a particularly common |
| 6471 | // case here. |
| 6472 | } else if (isa<TypedefDecl>(PrevDecl)) { |
| 6473 | Diag(NameLoc, diag::err_tag_definition_of_typedef) |
| 6474 | << Name |
| 6475 | << cast<TypedefDecl>(PrevDecl)->getUnderlyingType(); |
| 6476 | Diag(PrevDecl->getLocation(), diag::note_previous_decl) << PrevDecl; |
| 6477 | Invalid = true; |
| 6478 | |
| 6479 | // Otherwise, diagnose. |
| 6480 | } else { |
| 6481 | // The tag name clashes with something else in the target scope, |
| 6482 | // issue an error and recover by making this tag be anonymous. |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 6483 | Diag(NameLoc, diag::err_redefinition_different_kind) << Name; |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 6484 | Diag(PrevDecl->getLocation(), diag::note_previous_definition); |
Argyrios Kyrtzidis | b02ef24 | 2008-07-16 07:45:46 +0000 | [diff] [blame] | 6485 | Name = 0; |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 6486 | Invalid = true; |
Argyrios Kyrtzidis | b02ef24 | 2008-07-16 07:45:46 +0000 | [diff] [blame] | 6487 | } |
John McCall | 0d6b164 | 2010-04-23 18:46:30 +0000 | [diff] [blame] | 6488 | |
| 6489 | // The existing declaration isn't relevant to us; we're in a |
| 6490 | // new scope, so clear out the previous declaration. |
| 6491 | Previous.clear(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6492 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6493 | } |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 6494 | |
Chris Lattner | cc98eac | 2008-12-17 07:13:27 +0000 | [diff] [blame] | 6495 | CreateNewDecl: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6496 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6497 | TagDecl *PrevDecl = 0; |
| 6498 | if (Previous.isSingleResult()) |
| 6499 | PrevDecl = cast<TagDecl>(Previous.getFoundDecl()); |
| 6500 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6501 | // If there is an identifier, use the location of the identifier as the |
| 6502 | // location of the decl, otherwise use the location of the struct/union |
| 6503 | // keyword. |
| 6504 | SourceLocation Loc = NameLoc.isValid() ? NameLoc : KWLoc; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6505 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6506 | // Otherwise, create a new declaration. If there is a previous |
| 6507 | // declaration of the same entity, the two will be linked via |
| 6508 | // PrevDecl. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6509 | TagDecl *New; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 6510 | |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 6511 | bool IsForwardReference = false; |
Abramo Bagnara | 465d41b | 2010-05-11 21:36:43 +0000 | [diff] [blame] | 6512 | if (Kind == TTK_Enum) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6513 | // FIXME: Tag decls should be chained to any simultaneous vardecls, e.g.: |
| 6514 | // enum X { A, B, C } D; D should chain to X. |
Abramo Bagnara | ba877ad | 2011-03-09 14:09:51 +0000 | [diff] [blame] | 6515 | New = EnumDecl::Create(Context, SearchDC, KWLoc, Loc, Name, |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 6516 | cast_or_null<EnumDecl>(PrevDecl), ScopedEnum, |
Abramo Bagnara | a88cefd | 2010-12-03 18:54:17 +0000 | [diff] [blame] | 6517 | ScopedEnumUsesClassTag, !EnumUnderlying.isNull()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6518 | // If this is an undefined enum, warn. |
Douglas Gregor | f3a7b7c | 2010-06-22 14:26:35 +0000 | [diff] [blame] | 6519 | if (TUK != TUK_Definition && !Invalid) { |
| 6520 | TagDecl *Def; |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 6521 | if (getLangOptions().CPlusPlus0x && cast<EnumDecl>(New)->isFixed()) { |
| 6522 | // C++0x: 7.2p2: opaque-enum-declaration. |
| 6523 | // Conflicts are diagnosed above. Do nothing. |
| 6524 | } |
| 6525 | else if (PrevDecl && (Def = cast<EnumDecl>(PrevDecl)->getDefinition())) { |
Douglas Gregor | f3a7b7c | 2010-06-22 14:26:35 +0000 | [diff] [blame] | 6526 | Diag(Loc, diag::ext_forward_ref_enum_def) |
| 6527 | << New; |
| 6528 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 6529 | } else { |
Francois Pichet | 8dc3abc | 2010-09-12 05:06:55 +0000 | [diff] [blame] | 6530 | unsigned DiagID = diag::ext_forward_ref_enum; |
| 6531 | if (getLangOptions().Microsoft) |
| 6532 | DiagID = diag::ext_ms_forward_ref_enum; |
| 6533 | else if (getLangOptions().CPlusPlus) |
| 6534 | DiagID = diag::err_forward_ref_enum; |
| 6535 | Diag(Loc, DiagID); |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 6536 | |
| 6537 | // If this is a forward-declared reference to an enumeration, make a |
| 6538 | // note of it; we won't actually be introducing the declaration into |
| 6539 | // the declaration context. |
| 6540 | if (TUK == TUK_Reference) |
| 6541 | IsForwardReference = true; |
Douglas Gregor | f3a7b7c | 2010-06-22 14:26:35 +0000 | [diff] [blame] | 6542 | } |
Douglas Gregor | 80711a2 | 2009-03-06 18:34:03 +0000 | [diff] [blame] | 6543 | } |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 6544 | |
| 6545 | if (EnumUnderlying) { |
| 6546 | EnumDecl *ED = cast<EnumDecl>(New); |
| 6547 | if (TypeSourceInfo *TI = EnumUnderlying.dyn_cast<TypeSourceInfo*>()) |
| 6548 | ED->setIntegerTypeSourceInfo(TI); |
| 6549 | else |
| 6550 | ED->setIntegerType(QualType(EnumUnderlying.get<const Type*>(), 0)); |
| 6551 | ED->setPromotionType(ED->getIntegerType()); |
| 6552 | } |
| 6553 | |
Argyrios Kyrtzidis | 39ba4ae | 2008-06-09 23:19:58 +0000 | [diff] [blame] | 6554 | } else { |
| 6555 | // struct/union/class |
| 6556 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6557 | // FIXME: Tag decls should be chained to any simultaneous vardecls, e.g.: |
| 6558 | // struct X { int A; } D; D should chain to X. |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 6559 | if (getLangOptions().CPlusPlus) { |
Ted Kremenek | 2b345eb | 2008-09-05 17:39:33 +0000 | [diff] [blame] | 6560 | // FIXME: Look for a way to use RecordDecl for simple structs. |
Abramo Bagnara | ba877ad | 2011-03-09 14:09:51 +0000 | [diff] [blame] | 6561 | New = CXXRecordDecl::Create(Context, Kind, SearchDC, KWLoc, Loc, Name, |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6562 | cast_or_null<CXXRecordDecl>(PrevDecl)); |
Abramo Bagnara | ba877ad | 2011-03-09 14:09:51 +0000 | [diff] [blame] | 6563 | |
Argyrios Kyrtzidis | 76c38d3 | 2010-08-02 07:14:54 +0000 | [diff] [blame] | 6564 | if (isStdBadAlloc && (!StdBadAlloc || getStdBadAlloc()->isImplicit())) |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 6565 | StdBadAlloc = cast<CXXRecordDecl>(New); |
| 6566 | } else |
Abramo Bagnara | ba877ad | 2011-03-09 14:09:51 +0000 | [diff] [blame] | 6567 | New = RecordDecl::Create(Context, Kind, SearchDC, KWLoc, Loc, Name, |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6568 | cast_or_null<RecordDecl>(PrevDecl)); |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 6569 | } |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6570 | |
John McCall | b621766 | 2010-03-15 10:12:16 +0000 | [diff] [blame] | 6571 | // Maybe add qualifier info. |
| 6572 | if (SS.isNotEmpty()) { |
Fariborz Jahanian | 4fb2053 | 2010-05-14 21:35:02 +0000 | [diff] [blame] | 6573 | if (SS.isSet()) { |
Douglas Gregor | c22b5ff | 2011-02-25 02:25:35 +0000 | [diff] [blame] | 6574 | New->setQualifierInfo(SS.getWithLocInContext(Context)); |
Abramo Bagnara | 9b93488 | 2010-06-12 08:15:14 +0000 | [diff] [blame] | 6575 | if (NumMatchedTemplateParamLists > 0) { |
Douglas Gregor | c722ea4 | 2010-06-15 17:44:38 +0000 | [diff] [blame] | 6576 | New->setTemplateParameterListsInfo(Context, |
| 6577 | NumMatchedTemplateParamLists, |
Abramo Bagnara | 9b93488 | 2010-06-12 08:15:14 +0000 | [diff] [blame] | 6578 | (TemplateParameterList**) TemplateParameterLists.release()); |
| 6579 | } |
Fariborz Jahanian | 4fb2053 | 2010-05-14 21:35:02 +0000 | [diff] [blame] | 6580 | } |
| 6581 | else |
| 6582 | Invalid = true; |
John McCall | b621766 | 2010-03-15 10:12:16 +0000 | [diff] [blame] | 6583 | } |
| 6584 | |
Daniel Dunbar | 9f21f89 | 2010-05-27 01:53:40 +0000 | [diff] [blame] | 6585 | if (RecordDecl *RD = dyn_cast<RecordDecl>(New)) { |
| 6586 | // Add alignment attributes if necessary; these attributes are checked when |
| 6587 | // the ASTContext lays out the structure. |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6588 | // |
| 6589 | // It is important for implementing the correct semantics that this |
| 6590 | // happen here (in act on tag decl). The #pragma pack stack is |
| 6591 | // maintained as a result of parser callbacks which can occur at |
| 6592 | // many points during the parsing of a struct declaration (because |
| 6593 | // the #pragma tokens are effectively skipped over during the |
| 6594 | // parsing of the struct). |
Daniel Dunbar | 9f21f89 | 2010-05-27 01:53:40 +0000 | [diff] [blame] | 6595 | AddAlignmentAttributesForRecord(RD); |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6596 | } |
| 6597 | |
Douglas Gregor | f6b1185 | 2009-10-08 15:14:33 +0000 | [diff] [blame] | 6598 | // If this is a specialization of a member class (of a class template), |
| 6599 | // check the specialization. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6600 | if (isExplicitSpecialization && CheckMemberSpecialization(New, Previous)) |
Douglas Gregor | f6b1185 | 2009-10-08 15:14:33 +0000 | [diff] [blame] | 6601 | Invalid = true; |
Daniel Dunbar | 9f21f89 | 2010-05-27 01:53:40 +0000 | [diff] [blame] | 6602 | |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 6603 | if (Invalid) |
| 6604 | New->setInvalidDecl(); |
| 6605 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6606 | if (Attr) |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 6607 | ProcessDeclAttributeList(S, New, Attr); |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6608 | |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 6609 | // If we're declaring or defining a tag in function prototype scope |
| 6610 | // 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] | 6611 | if (Name && S->isFunctionPrototypeScope() && !getLangOptions().CPlusPlus) |
| 6612 | Diag(Loc, diag::warn_decl_in_param_list) << Context.getTagDeclType(New); |
| 6613 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 6614 | // Set the lexical context. If the tag has a C++ scope specifier, the |
| 6615 | // lexical context will be different from the semantic context. |
Douglas Gregor | 1931b44 | 2009-02-03 00:34:39 +0000 | [diff] [blame] | 6616 | New->setLexicalDeclContext(CurContext); |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 6617 | |
John McCall | 02cace7 | 2009-08-28 07:59:38 +0000 | [diff] [blame] | 6618 | // Mark this as a friend decl if applicable. |
| 6619 | if (TUK == TUK_Friend) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 6620 | New->setObjectOfFriendDecl(/* PreviouslyDeclared = */ !Previous.empty()); |
John McCall | 02cace7 | 2009-08-28 07:59:38 +0000 | [diff] [blame] | 6621 | |
Anders Carlsson | 0cf8830 | 2009-03-26 01:19:02 +0000 | [diff] [blame] | 6622 | // Set the access specifier. |
John McCall | 9c86b51 | 2010-03-25 21:28:06 +0000 | [diff] [blame] | 6623 | if (!Invalid && SearchDC->isRecord()) |
Douglas Gregor | d0c8737 | 2009-05-27 17:30:49 +0000 | [diff] [blame] | 6624 | SetMemberAccessSpecifier(New, PrevDecl, AS); |
Douglas Gregor | 06c0fec | 2009-03-25 22:00:53 +0000 | [diff] [blame] | 6625 | |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 6626 | if (TUK == TUK_Definition) |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 6627 | New->startDefinition(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6628 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6629 | // If this has an identifier, add it to the scope stack. |
John McCall | d7eff68 | 2009-09-02 00:55:30 +0000 | [diff] [blame] | 6630 | if (TUK == TUK_Friend) { |
John McCall | 82b9fb8 | 2009-09-02 19:32:14 +0000 | [diff] [blame] | 6631 | // We might be replacing an existing declaration in the lookup tables; |
| 6632 | // if so, borrow its access specifier. |
| 6633 | if (PrevDecl) |
| 6634 | New->setAccess(PrevDecl->getAccess()); |
| 6635 | |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 6636 | DeclContext *DC = New->getDeclContext()->getRedeclContext(); |
John McCall | 9c86b51 | 2010-03-25 21:28:06 +0000 | [diff] [blame] | 6637 | DC->makeDeclVisibleInContext(New, /* Recoverable = */ false); |
| 6638 | if (Name) // can be null along some error paths |
John McCall | d7eff68 | 2009-09-02 00:55:30 +0000 | [diff] [blame] | 6639 | if (Scope *EnclosingScope = getScopeForDeclContext(S, DC)) |
| 6640 | PushOnScopeChains(New, EnclosingScope, /* AddToContext = */ false); |
John McCall | d7eff68 | 2009-09-02 00:55:30 +0000 | [diff] [blame] | 6641 | } else if (Name) { |
Douglas Gregor | 1a0d31a | 2009-01-12 18:45:55 +0000 | [diff] [blame] | 6642 | S = getNonFieldDeclScope(S); |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 6643 | PushOnScopeChains(New, S, !IsForwardReference); |
| 6644 | if (IsForwardReference) |
| 6645 | SearchDC->makeDeclVisibleInContext(New, /* Recoverable = */ false); |
| 6646 | |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 6647 | } else { |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 6648 | CurContext->addDecl(New); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6649 | } |
Argyrios Kyrtzidis | 5239304 | 2008-11-09 23:41:00 +0000 | [diff] [blame] | 6650 | |
Douglas Gregor | c29f77b | 2009-07-07 16:35:42 +0000 | [diff] [blame] | 6651 | // If this is the C FILE type, notify the AST context. |
| 6652 | if (IdentifierInfo *II = New->getIdentifier()) |
| 6653 | if (!New->isInvalidDecl() && |
Sebastian Redl | 7a126a4 | 2010-08-31 00:36:30 +0000 | [diff] [blame] | 6654 | New->getDeclContext()->getRedeclContext()->isTranslationUnit() && |
Douglas Gregor | c29f77b | 2009-07-07 16:35:42 +0000 | [diff] [blame] | 6655 | II->isStr("FILE")) |
| 6656 | Context.setFILEDecl(New); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6657 | |
Douglas Gregor | 402abb5 | 2009-05-28 23:31:59 +0000 | [diff] [blame] | 6658 | OwnedDecl = true; |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6659 | return New; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6660 | } |
| 6661 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6662 | void Sema::ActOnTagStartDefinition(Scope *S, Decl *TagD) { |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 6663 | AdjustDeclIfTemplate(TagD); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6664 | TagDecl *Tag = cast<TagDecl>(TagD); |
Douglas Gregor | 48c89f4 | 2010-04-24 16:38:41 +0000 | [diff] [blame] | 6665 | |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 6666 | // Enter the tag context. |
| 6667 | PushDeclContext(S, Tag); |
John McCall | f936815 | 2009-12-20 07:58:13 +0000 | [diff] [blame] | 6668 | } |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 6669 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6670 | void Sema::ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagD, |
Anders Carlsson | dfc2f10 | 2011-01-22 17:51:53 +0000 | [diff] [blame] | 6671 | ClassVirtSpecifiers &CVS, |
John McCall | f936815 | 2009-12-20 07:58:13 +0000 | [diff] [blame] | 6672 | SourceLocation LBraceLoc) { |
| 6673 | AdjustDeclIfTemplate(TagD); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6674 | CXXRecordDecl *Record = cast<CXXRecordDecl>(TagD); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 6675 | |
John McCall | f936815 | 2009-12-20 07:58:13 +0000 | [diff] [blame] | 6676 | FieldCollector->StartClass(); |
| 6677 | |
| 6678 | if (!Record->getIdentifier()) |
| 6679 | return; |
| 6680 | |
Anders Carlsson | cb88a1f | 2011-01-24 16:26:15 +0000 | [diff] [blame] | 6681 | if (CVS.isFinalSpecified()) |
| 6682 | Record->addAttr(new (Context) FinalAttr(CVS.getFinalLoc(), Context)); |
| 6683 | if (CVS.isExplicitSpecified()) |
| 6684 | Record->addAttr(new (Context) ExplicitAttr(CVS.getExplicitLoc(), Context)); |
Anders Carlsson | dfc2f10 | 2011-01-22 17:51:53 +0000 | [diff] [blame] | 6685 | |
John McCall | f936815 | 2009-12-20 07:58:13 +0000 | [diff] [blame] | 6686 | // C++ [class]p2: |
| 6687 | // [...] The class-name is also inserted into the scope of the |
| 6688 | // class itself; this is known as the injected-class-name. For |
| 6689 | // purposes of access checking, the injected-class-name is treated |
| 6690 | // as if it were a public member name. |
| 6691 | CXXRecordDecl *InjectedClassName |
Abramo Bagnara | ba877ad | 2011-03-09 14:09:51 +0000 | [diff] [blame] | 6692 | = CXXRecordDecl::Create(Context, Record->getTagKind(), CurContext, |
| 6693 | Record->getLocStart(), Record->getLocation(), |
John McCall | f936815 | 2009-12-20 07:58:13 +0000 | [diff] [blame] | 6694 | Record->getIdentifier(), |
Argyrios Kyrtzidis | 3b8f610 | 2010-10-14 20:14:21 +0000 | [diff] [blame] | 6695 | /*PrevDecl=*/0, |
| 6696 | /*DelayTypeCreation=*/true); |
| 6697 | Context.getTypeDeclType(InjectedClassName, Record); |
John McCall | f936815 | 2009-12-20 07:58:13 +0000 | [diff] [blame] | 6698 | InjectedClassName->setImplicit(); |
| 6699 | InjectedClassName->setAccess(AS_public); |
| 6700 | if (ClassTemplateDecl *Template = Record->getDescribedClassTemplate()) |
| 6701 | InjectedClassName->setDescribedClassTemplate(Template); |
| 6702 | PushOnScopeChains(InjectedClassName, S); |
| 6703 | assert(InjectedClassName->isInjectedClassName() && |
| 6704 | "Broken injected-class-name"); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 6705 | } |
| 6706 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6707 | void Sema::ActOnTagFinishDefinition(Scope *S, Decl *TagD, |
Argyrios Kyrtzidis | 07a5b28 | 2009-07-14 03:17:52 +0000 | [diff] [blame] | 6708 | SourceLocation RBraceLoc) { |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 6709 | AdjustDeclIfTemplate(TagD); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6710 | TagDecl *Tag = cast<TagDecl>(TagD); |
Argyrios Kyrtzidis | 07a5b28 | 2009-07-14 03:17:52 +0000 | [diff] [blame] | 6711 | Tag->setRBraceLoc(RBraceLoc); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 6712 | |
| 6713 | if (isa<CXXRecordDecl>(Tag)) |
| 6714 | FieldCollector->FinishClass(); |
| 6715 | |
| 6716 | // Exit this scope of this tag's definition. |
| 6717 | PopDeclContext(); |
Douglas Gregor | adda846 | 2010-01-06 17:00:51 +0000 | [diff] [blame] | 6718 | |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 6719 | // Notify the consumer that we've defined a tag. |
| 6720 | Consumer.HandleTagDeclDefinition(Tag); |
| 6721 | } |
Chris Lattner | 5a6ddbf | 2008-06-21 19:39:06 +0000 | [diff] [blame] | 6722 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6723 | void Sema::ActOnTagDefinitionError(Scope *S, Decl *TagD) { |
John McCall | db7bb4a | 2010-03-17 00:38:33 +0000 | [diff] [blame] | 6724 | AdjustDeclIfTemplate(TagD); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6725 | TagDecl *Tag = cast<TagDecl>(TagD); |
John McCall | db7bb4a | 2010-03-17 00:38:33 +0000 | [diff] [blame] | 6726 | Tag->setInvalidDecl(); |
| 6727 | |
John McCall | a8cab01 | 2010-03-17 19:25:57 +0000 | [diff] [blame] | 6728 | // We're undoing ActOnTagStartDefinition here, not |
| 6729 | // ActOnStartCXXMemberDeclarations, so we don't have to mess with |
| 6730 | // the FieldCollector. |
John McCall | db7bb4a | 2010-03-17 00:38:33 +0000 | [diff] [blame] | 6731 | |
| 6732 | PopDeclContext(); |
| 6733 | } |
| 6734 | |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 6735 | // Note that FieldName may be null for anonymous bitfields. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6736 | bool Sema::VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 6737 | QualType FieldTy, const Expr *BitWidth, |
| 6738 | bool *ZeroWidth) { |
| 6739 | // Default to true; that shouldn't confuse checks for emptiness |
| 6740 | if (ZeroWidth) |
| 6741 | *ZeroWidth = true; |
| 6742 | |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 6743 | // C99 6.7.2.1p4 - verify the field type. |
Chris Lattner | 8b963ef | 2009-03-05 23:01:03 +0000 | [diff] [blame] | 6744 | // C++ 9.6p3: A bit-field shall have integral or enumeration type. |
Douglas Gregor | 2ade35e | 2010-06-16 00:17:44 +0000 | [diff] [blame] | 6745 | if (!FieldTy->isDependentType() && !FieldTy->isIntegralOrEnumerationType()) { |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 6746 | // Handle incomplete types with specific error. |
Douglas Gregor | a03aca8 | 2009-03-10 21:58:27 +0000 | [diff] [blame] | 6747 | if (RequireCompleteType(FieldLoc, FieldTy, diag::err_field_incomplete)) |
| 6748 | return true; |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 6749 | if (FieldName) |
| 6750 | return Diag(FieldLoc, diag::err_not_integral_type_bitfield) |
| 6751 | << FieldName << FieldTy << BitWidth->getSourceRange(); |
| 6752 | return Diag(FieldLoc, diag::err_not_integral_type_anon_bitfield) |
| 6753 | << FieldTy << BitWidth->getSourceRange(); |
Douglas Gregor | e186269 | 2010-12-15 23:18:36 +0000 | [diff] [blame] | 6754 | } else if (DiagnoseUnexpandedParameterPack(const_cast<Expr *>(BitWidth), |
| 6755 | UPPC_BitFieldWidth)) |
| 6756 | return true; |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 6757 | |
| 6758 | // If the bit-width is type- or value-dependent, don't try to check |
| 6759 | // it now. |
| 6760 | if (BitWidth->isValueDependent() || BitWidth->isTypeDependent()) |
| 6761 | return false; |
| 6762 | |
Anders Carlsson | 9f1e572 | 2008-12-06 20:33:04 +0000 | [diff] [blame] | 6763 | llvm::APSInt Value; |
| 6764 | if (VerifyIntegerConstantExpression(BitWidth, &Value)) |
| 6765 | return true; |
| 6766 | |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 6767 | if (Value != 0 && ZeroWidth) |
| 6768 | *ZeroWidth = false; |
| 6769 | |
Chris Lattner | cd08707 | 2008-12-12 04:56:04 +0000 | [diff] [blame] | 6770 | // Zero-width bitfield is ok for anonymous field. |
| 6771 | if (Value == 0 && FieldName) |
| 6772 | return Diag(FieldLoc, diag::err_bitfield_has_zero_width) << FieldName; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6773 | |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 6774 | if (Value.isSigned() && Value.isNegative()) { |
| 6775 | if (FieldName) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6776 | return Diag(FieldLoc, diag::err_bitfield_has_negative_width) |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 6777 | << FieldName << Value.toString(10); |
| 6778 | return Diag(FieldLoc, diag::err_anon_bitfield_has_negative_width) |
| 6779 | << Value.toString(10); |
| 6780 | } |
Anders Carlsson | 9f1e572 | 2008-12-06 20:33:04 +0000 | [diff] [blame] | 6781 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 6782 | if (!FieldTy->isDependentType()) { |
| 6783 | uint64_t TypeSize = Context.getTypeSize(FieldTy); |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 6784 | if (Value.getZExtValue() > TypeSize) { |
Anders Carlsson | 72468ec | 2010-04-16 15:16:32 +0000 | [diff] [blame] | 6785 | if (!getLangOptions().CPlusPlus) { |
| 6786 | if (FieldName) |
| 6787 | return Diag(FieldLoc, diag::err_bitfield_width_exceeds_type_size) |
| 6788 | << FieldName << (unsigned)Value.getZExtValue() |
| 6789 | << (unsigned)TypeSize; |
| 6790 | |
| 6791 | return Diag(FieldLoc, diag::err_anon_bitfield_width_exceeds_type_size) |
| 6792 | << (unsigned)Value.getZExtValue() << (unsigned)TypeSize; |
| 6793 | } |
| 6794 | |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 6795 | if (FieldName) |
Anders Carlsson | 72468ec | 2010-04-16 15:16:32 +0000 | [diff] [blame] | 6796 | Diag(FieldLoc, diag::warn_bitfield_width_exceeds_type_size) |
| 6797 | << FieldName << (unsigned)Value.getZExtValue() |
| 6798 | << (unsigned)TypeSize; |
| 6799 | else |
| 6800 | Diag(FieldLoc, diag::warn_anon_bitfield_width_exceeds_type_size) |
| 6801 | << (unsigned)Value.getZExtValue() << (unsigned)TypeSize; |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 6802 | } |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 6803 | } |
Anders Carlsson | 9f1e572 | 2008-12-06 20:33:04 +0000 | [diff] [blame] | 6804 | |
| 6805 | return false; |
| 6806 | } |
| 6807 | |
Steve Naroff | 08d92e4 | 2007-09-15 18:49:24 +0000 | [diff] [blame] | 6808 | /// 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] | 6809 | /// to create a FieldDecl object for it. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6810 | Decl *Sema::ActOnField(Scope *S, Decl *TagD, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6811 | SourceLocation DeclStart, |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 6812 | Declarator &D, ExprTy *BitfieldWidth) { |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6813 | FieldDecl *Res = HandleField(S, cast_or_null<RecordDecl>(TagD), |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 6814 | DeclStart, D, static_cast<Expr*>(BitfieldWidth), |
| 6815 | AS_public); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 6816 | return Res; |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 6817 | } |
| 6818 | |
| 6819 | /// HandleField - Analyze a field of a C struct or a C++ data member. |
| 6820 | /// |
| 6821 | FieldDecl *Sema::HandleField(Scope *S, RecordDecl *Record, |
| 6822 | SourceLocation DeclStart, |
Douglas Gregor | 4dd55f5 | 2009-03-11 20:50:30 +0000 | [diff] [blame] | 6823 | Declarator &D, Expr *BitWidth, |
| 6824 | AccessSpecifier AS) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6825 | IdentifierInfo *II = D.getIdentifier(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6826 | SourceLocation Loc = DeclStart; |
| 6827 | if (II) Loc = D.getIdentifierLoc(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6828 | |
John McCall | bf1a028 | 2010-06-04 23:28:52 +0000 | [diff] [blame] | 6829 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); |
| 6830 | QualType T = TInfo->getType(); |
Douglas Gregor | e186269 | 2010-12-15 23:18:36 +0000 | [diff] [blame] | 6831 | if (getLangOptions().CPlusPlus) { |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 6832 | CheckExtraCXXDefaultArguments(D); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 6833 | |
Douglas Gregor | e186269 | 2010-12-15 23:18:36 +0000 | [diff] [blame] | 6834 | if (DiagnoseUnexpandedParameterPack(D.getIdentifierLoc(), TInfo, |
| 6835 | UPPC_DataMemberType)) { |
| 6836 | D.setInvalidType(); |
| 6837 | T = Context.IntTy; |
| 6838 | TInfo = Context.getTrivialTypeSourceInfo(T, Loc); |
| 6839 | } |
| 6840 | } |
| 6841 | |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 6842 | DiagnoseFunctionSpecifiers(D); |
| 6843 | |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 6844 | if (D.getDeclSpec().isThreadSpecified()) |
| 6845 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_invalid_thread); |
Douglas Gregor | 7f6ff02 | 2010-08-30 14:32:14 +0000 | [diff] [blame] | 6846 | |
| 6847 | // Check to see if this name was declared as a member previously |
| 6848 | LookupResult Previous(*this, II, Loc, LookupMemberName, ForRedeclaration); |
| 6849 | LookupName(Previous, S); |
| 6850 | assert((Previous.empty() || Previous.isOverloadedResult() || |
| 6851 | Previous.isSingleResult()) |
| 6852 | && "Lookup of member name should be either overloaded, single or null"); |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 6853 | |
Douglas Gregor | 7f6ff02 | 2010-08-30 14:32:14 +0000 | [diff] [blame] | 6854 | // If the name is overloaded then get any declaration else get the single result |
| 6855 | NamedDecl *PrevDecl = Previous.isOverloadedResult() ? |
| 6856 | Previous.getRepresentativeDecl() : Previous.getAsSingle<NamedDecl>(); |
Douglas Gregor | c19ee3e | 2009-06-17 23:37:01 +0000 | [diff] [blame] | 6857 | |
| 6858 | if (PrevDecl && PrevDecl->isTemplateParameter()) { |
| 6859 | // Maybe we will complain about the shadowed template parameter. |
| 6860 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl); |
| 6861 | // Just pretend that we didn't see the previous declaration. |
| 6862 | PrevDecl = 0; |
| 6863 | } |
| 6864 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 6865 | if (PrevDecl && !isDeclInScope(PrevDecl, Record, S)) |
| 6866 | PrevDecl = 0; |
| 6867 | |
Steve Naroff | ea218b8 | 2009-07-14 14:58:18 +0000 | [diff] [blame] | 6868 | bool Mutable |
| 6869 | = (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_mutable); |
| 6870 | SourceLocation TSSL = D.getSourceRange().getBegin(); |
| 6871 | FieldDecl *NewFD |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 6872 | = CheckFieldDecl(II, T, TInfo, Record, Loc, Mutable, BitWidth, TSSL, |
Steve Naroff | ea218b8 | 2009-07-14 14:58:18 +0000 | [diff] [blame] | 6873 | AS, PrevDecl, &D); |
Rafael Espindola | 0162070 | 2010-03-21 22:56:43 +0000 | [diff] [blame] | 6874 | |
| 6875 | if (NewFD->isInvalidDecl()) |
| 6876 | Record->setInvalidDecl(); |
| 6877 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 6878 | if (NewFD->isInvalidDecl() && PrevDecl) { |
| 6879 | // Don't introduce NewFD into scope; there's already something |
| 6880 | // with the same name in the same scope. |
| 6881 | } else if (II) { |
| 6882 | PushOnScopeChains(NewFD, S); |
| 6883 | } else |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 6884 | Record->addDecl(NewFD); |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 6885 | |
| 6886 | return NewFD; |
| 6887 | } |
| 6888 | |
| 6889 | /// \brief Build a new FieldDecl and check its well-formedness. |
| 6890 | /// |
| 6891 | /// This routine builds a new FieldDecl given the fields name, type, |
| 6892 | /// record, etc. \p PrevDecl should refer to any previous declaration |
| 6893 | /// with the same name and in the same scope as the field to be |
| 6894 | /// created. |
| 6895 | /// |
| 6896 | /// \returns a new FieldDecl. |
| 6897 | /// |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6898 | /// \todo The Declarator argument is a hack. It will be removed once |
Argyrios Kyrtzidis | a1d5662 | 2009-08-19 01:27:57 +0000 | [diff] [blame] | 6899 | FieldDecl *Sema::CheckFieldDecl(DeclarationName Name, QualType T, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 6900 | TypeSourceInfo *TInfo, |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 6901 | RecordDecl *Record, SourceLocation Loc, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6902 | bool Mutable, Expr *BitWidth, |
Steve Naroff | ea218b8 | 2009-07-14 14:58:18 +0000 | [diff] [blame] | 6903 | SourceLocation TSSL, |
Douglas Gregor | 4dd55f5 | 2009-03-11 20:50:30 +0000 | [diff] [blame] | 6904 | AccessSpecifier AS, NamedDecl *PrevDecl, |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 6905 | Declarator *D) { |
| 6906 | IdentifierInfo *II = Name.getAsIdentifierInfo(); |
Steve Naroff | 5912a35 | 2007-08-28 20:14:24 +0000 | [diff] [blame] | 6907 | bool InvalidDecl = false; |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 6908 | if (D) InvalidDecl = D->isInvalidType(); |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 6909 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 6910 | // If we receive a broken type, recover by assuming 'int' and |
| 6911 | // marking this declaration as invalid. |
| 6912 | if (T.isNull()) { |
| 6913 | InvalidDecl = true; |
| 6914 | T = Context.IntTy; |
| 6915 | } |
| 6916 | |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 6917 | QualType EltTy = Context.getBaseElementType(T); |
| 6918 | if (!EltTy->isDependentType() && |
John McCall | 2d7d2d9 | 2010-08-16 23:42:35 +0000 | [diff] [blame] | 6919 | RequireCompleteType(Loc, EltTy, diag::err_field_incomplete)) { |
| 6920 | // Fields of incomplete type force their record to be invalid. |
| 6921 | Record->setInvalidDecl(); |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 6922 | InvalidDecl = true; |
John McCall | 2d7d2d9 | 2010-08-16 23:42:35 +0000 | [diff] [blame] | 6923 | } |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 6924 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6925 | // C99 6.7.2.1p8: A member of a structure or union may have any type other |
| 6926 | // than a variably modified type. |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 6927 | if (!InvalidDecl && T->isVariablyModifiedType()) { |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 6928 | bool SizeIsNegative; |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 6929 | llvm::APSInt Oversized; |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 6930 | QualType FixedTy = TryToFixInvalidVariablyModifiedType(T, Context, |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 6931 | SizeIsNegative, |
| 6932 | Oversized); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 6933 | if (!FixedTy.isNull()) { |
| 6934 | Diag(Loc, diag::warn_illegal_constant_array_size); |
| 6935 | T = FixedTy; |
| 6936 | } else { |
| 6937 | if (SizeIsNegative) |
| 6938 | Diag(Loc, diag::err_typecheck_negative_array_size); |
Douglas Gregor | 2767ce2 | 2010-08-18 00:39:00 +0000 | [diff] [blame] | 6939 | else if (Oversized.getBoolValue()) |
| 6940 | Diag(Loc, diag::err_array_too_large) |
| 6941 | << Oversized.toString(10); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 6942 | else |
| 6943 | Diag(Loc, diag::err_typecheck_field_variable_size); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 6944 | InvalidDecl = true; |
| 6945 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6946 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6947 | |
Anders Carlsson | 4681ebd | 2009-03-22 20:18:17 +0000 | [diff] [blame] | 6948 | // Fields can not have abstract class types |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 6949 | if (!InvalidDecl && RequireNonAbstractType(Loc, T, |
| 6950 | diag::err_abstract_type_in_decl, |
| 6951 | AbstractFieldType)) |
Anders Carlsson | 4681ebd | 2009-03-22 20:18:17 +0000 | [diff] [blame] | 6952 | InvalidDecl = true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6953 | |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 6954 | bool ZeroWidth = false; |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 6955 | // If this is declared as a bit-field, check the bit-field. |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 6956 | if (!InvalidDecl && BitWidth && |
| 6957 | VerifyBitField(Loc, II, T, BitWidth, &ZeroWidth)) { |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 6958 | InvalidDecl = true; |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 6959 | BitWidth = 0; |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 6960 | ZeroWidth = false; |
Anders Carlsson | 9f1e572 | 2008-12-06 20:33:04 +0000 | [diff] [blame] | 6961 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6962 | |
John McCall | 4bde1e1 | 2010-06-04 08:34:12 +0000 | [diff] [blame] | 6963 | // Check that 'mutable' is consistent with the type of the declaration. |
| 6964 | if (!InvalidDecl && Mutable) { |
| 6965 | unsigned DiagID = 0; |
| 6966 | if (T->isReferenceType()) |
| 6967 | DiagID = diag::err_mutable_reference; |
| 6968 | else if (T.isConstQualified()) |
| 6969 | DiagID = diag::err_mutable_const; |
| 6970 | |
| 6971 | if (DiagID) { |
| 6972 | SourceLocation ErrLoc = Loc; |
| 6973 | if (D && D->getDeclSpec().getStorageClassSpecLoc().isValid()) |
| 6974 | ErrLoc = D->getDeclSpec().getStorageClassSpecLoc(); |
| 6975 | Diag(ErrLoc, DiagID); |
| 6976 | Mutable = false; |
| 6977 | InvalidDecl = true; |
| 6978 | } |
| 6979 | } |
| 6980 | |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 6981 | FieldDecl *NewFD = FieldDecl::Create(Context, Record, TSSL, Loc, II, T, TInfo, |
Argyrios Kyrtzidis | a5d8200 | 2009-08-21 00:31:54 +0000 | [diff] [blame] | 6982 | BitWidth, Mutable); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 6983 | if (InvalidDecl) |
| 6984 | NewFD->setInvalidDecl(); |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 6985 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 6986 | if (PrevDecl && !isa<TagDecl>(PrevDecl)) { |
| 6987 | Diag(Loc, diag::err_duplicate_member) << II; |
| 6988 | Diag(PrevDecl->getLocation(), diag::note_previous_declaration); |
| 6989 | NewFD->setInvalidDecl(); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 6990 | } |
| 6991 | |
John McCall | 86ff308 | 2010-02-04 22:26:26 +0000 | [diff] [blame] | 6992 | if (!InvalidDecl && getLangOptions().CPlusPlus) { |
Anders Carlsson | dfdfc58 | 2010-11-07 19:13:55 +0000 | [diff] [blame] | 6993 | if (Record->isUnion()) { |
| 6994 | if (const RecordType *RT = EltTy->getAs<RecordType>()) { |
| 6995 | CXXRecordDecl* RDecl = cast<CXXRecordDecl>(RT->getDecl()); |
| 6996 | if (RDecl->getDefinition()) { |
| 6997 | // C++ [class.union]p1: An object of a class with a non-trivial |
| 6998 | // constructor, a non-trivial copy constructor, a non-trivial |
| 6999 | // destructor, or a non-trivial copy assignment operator |
| 7000 | // cannot be a member of a union, nor can an array of such |
| 7001 | // objects. |
| 7002 | // TODO: C++0x alters this restriction significantly. |
| 7003 | if (CheckNontrivialField(NewFD)) |
| 7004 | NewFD->setInvalidDecl(); |
| 7005 | } |
| 7006 | } |
| 7007 | |
| 7008 | // C++ [class.union]p1: If a union contains a member of reference type, |
| 7009 | // the program is ill-formed. |
| 7010 | if (EltTy->isReferenceType()) { |
| 7011 | Diag(NewFD->getLocation(), diag::err_union_member_of_reference_type) |
| 7012 | << NewFD->getDeclName() << EltTy; |
| 7013 | NewFD->setInvalidDecl(); |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7014 | } |
| 7015 | } |
| 7016 | } |
| 7017 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 7018 | // FIXME: We need to pass in the attributes given an AST |
| 7019 | // representation, not a parser representation. |
| 7020 | if (D) |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 7021 | // FIXME: What to pass instead of TUScope? |
| 7022 | ProcessDeclAttributes(TUScope, NewFD, *D); |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 7023 | |
Fariborz Jahanian | f6123ca | 2009-02-19 00:22:47 +0000 | [diff] [blame] | 7024 | if (T.isObjCGCWeak()) |
Fariborz Jahanian | ed7e9ef | 2009-02-18 18:14:41 +0000 | [diff] [blame] | 7025 | Diag(Loc, diag::warn_attribute_weak_on_field); |
Anders Carlsson | ad14806 | 2008-02-16 00:29:18 +0000 | [diff] [blame] | 7026 | |
Douglas Gregor | 4dd55f5 | 2009-03-11 20:50:30 +0000 | [diff] [blame] | 7027 | NewFD->setAccess(AS); |
Steve Naroff | 5912a35 | 2007-08-28 20:14:24 +0000 | [diff] [blame] | 7028 | return NewFD; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7029 | } |
| 7030 | |
Argyrios Kyrtzidis | dd7744d | 2010-08-16 17:27:08 +0000 | [diff] [blame] | 7031 | bool Sema::CheckNontrivialField(FieldDecl *FD) { |
| 7032 | assert(FD); |
| 7033 | assert(getLangOptions().CPlusPlus && "valid check only for C++"); |
| 7034 | |
| 7035 | if (FD->isInvalidDecl()) |
| 7036 | return true; |
| 7037 | |
| 7038 | QualType EltTy = Context.getBaseElementType(FD->getType()); |
| 7039 | if (const RecordType *RT = EltTy->getAs<RecordType>()) { |
| 7040 | CXXRecordDecl* RDecl = cast<CXXRecordDecl>(RT->getDecl()); |
| 7041 | if (RDecl->getDefinition()) { |
| 7042 | // We check for copy constructors before constructors |
| 7043 | // because otherwise we'll never get complaints about |
| 7044 | // copy constructors. |
| 7045 | |
| 7046 | CXXSpecialMember member = CXXInvalid; |
| 7047 | if (!RDecl->hasTrivialCopyConstructor()) |
| 7048 | member = CXXCopyConstructor; |
| 7049 | else if (!RDecl->hasTrivialConstructor()) |
| 7050 | member = CXXConstructor; |
| 7051 | else if (!RDecl->hasTrivialCopyAssignment()) |
| 7052 | member = CXXCopyAssignment; |
| 7053 | else if (!RDecl->hasTrivialDestructor()) |
| 7054 | member = CXXDestructor; |
| 7055 | |
| 7056 | if (member != CXXInvalid) { |
| 7057 | Diag(FD->getLocation(), diag::err_illegal_union_or_anon_struct_member) |
| 7058 | << (int)FD->getParent()->isUnion() << FD->getDeclName() << member; |
| 7059 | DiagnoseNontrivial(RT, member); |
| 7060 | return true; |
| 7061 | } |
| 7062 | } |
| 7063 | } |
| 7064 | |
| 7065 | return false; |
| 7066 | } |
| 7067 | |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7068 | /// DiagnoseNontrivial - Given that a class has a non-trivial |
| 7069 | /// special member, figure out why. |
| 7070 | void Sema::DiagnoseNontrivial(const RecordType* T, CXXSpecialMember member) { |
| 7071 | QualType QT(T, 0U); |
| 7072 | CXXRecordDecl* RD = cast<CXXRecordDecl>(T->getDecl()); |
| 7073 | |
| 7074 | // Check whether the member was user-declared. |
| 7075 | switch (member) { |
Douglas Gregor | 66dd939 | 2010-04-22 14:36:26 +0000 | [diff] [blame] | 7076 | case CXXInvalid: |
| 7077 | break; |
| 7078 | |
Anders Carlsson | 3b8c53b | 2010-04-22 05:40:53 +0000 | [diff] [blame] | 7079 | case CXXConstructor: |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7080 | if (RD->hasUserDeclaredConstructor()) { |
| 7081 | typedef CXXRecordDecl::ctor_iterator ctor_iter; |
Sebastian Redl | 38fd4d0 | 2009-10-25 22:31:45 +0000 | [diff] [blame] | 7082 | for (ctor_iter ci = RD->ctor_begin(), ce = RD->ctor_end(); ci != ce;++ci){ |
| 7083 | const FunctionDecl *body = 0; |
Argyrios Kyrtzidis | 06a54a3 | 2010-07-07 11:31:19 +0000 | [diff] [blame] | 7084 | ci->hasBody(body); |
Anders Carlsson | 10dc0f8 | 2010-04-20 23:32:58 +0000 | [diff] [blame] | 7085 | if (!body || !cast<CXXConstructorDecl>(body)->isImplicitlyDefined()) { |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7086 | SourceLocation CtorLoc = ci->getLocation(); |
| 7087 | Diag(CtorLoc, diag::note_nontrivial_user_defined) << QT << member; |
| 7088 | return; |
| 7089 | } |
Sebastian Redl | 38fd4d0 | 2009-10-25 22:31:45 +0000 | [diff] [blame] | 7090 | } |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7091 | |
| 7092 | assert(0 && "found no user-declared constructors"); |
| 7093 | return; |
| 7094 | } |
| 7095 | break; |
| 7096 | |
| 7097 | case CXXCopyConstructor: |
| 7098 | if (RD->hasUserDeclaredCopyConstructor()) { |
| 7099 | SourceLocation CtorLoc = |
| 7100 | RD->getCopyConstructor(Context, 0)->getLocation(); |
| 7101 | Diag(CtorLoc, diag::note_nontrivial_user_defined) << QT << member; |
| 7102 | return; |
| 7103 | } |
| 7104 | break; |
| 7105 | |
| 7106 | case CXXCopyAssignment: |
| 7107 | if (RD->hasUserDeclaredCopyAssignment()) { |
| 7108 | // FIXME: this should use the location of the copy |
| 7109 | // assignment, not the type. |
| 7110 | SourceLocation TyLoc = RD->getSourceRange().getBegin(); |
| 7111 | Diag(TyLoc, diag::note_nontrivial_user_defined) << QT << member; |
| 7112 | return; |
| 7113 | } |
| 7114 | break; |
| 7115 | |
| 7116 | case CXXDestructor: |
| 7117 | if (RD->hasUserDeclaredDestructor()) { |
Douglas Gregor | db89f28 | 2010-07-01 22:47:18 +0000 | [diff] [blame] | 7118 | SourceLocation DtorLoc = LookupDestructor(RD)->getLocation(); |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7119 | Diag(DtorLoc, diag::note_nontrivial_user_defined) << QT << member; |
| 7120 | return; |
| 7121 | } |
| 7122 | break; |
| 7123 | } |
| 7124 | |
| 7125 | typedef CXXRecordDecl::base_class_iterator base_iter; |
| 7126 | |
| 7127 | // Virtual bases and members inhibit trivial copying/construction, |
| 7128 | // but not trivial destruction. |
| 7129 | if (member != CXXDestructor) { |
| 7130 | // Check for virtual bases. vbases includes indirect virtual bases, |
| 7131 | // so we just iterate through the direct bases. |
| 7132 | for (base_iter bi = RD->bases_begin(), be = RD->bases_end(); bi != be; ++bi) |
| 7133 | if (bi->isVirtual()) { |
| 7134 | SourceLocation BaseLoc = bi->getSourceRange().getBegin(); |
| 7135 | Diag(BaseLoc, diag::note_nontrivial_has_virtual) << QT << 1; |
| 7136 | return; |
| 7137 | } |
| 7138 | |
| 7139 | // Check for virtual methods. |
| 7140 | typedef CXXRecordDecl::method_iterator meth_iter; |
| 7141 | for (meth_iter mi = RD->method_begin(), me = RD->method_end(); mi != me; |
| 7142 | ++mi) { |
| 7143 | if (mi->isVirtual()) { |
| 7144 | SourceLocation MLoc = mi->getSourceRange().getBegin(); |
| 7145 | Diag(MLoc, diag::note_nontrivial_has_virtual) << QT << 0; |
| 7146 | return; |
| 7147 | } |
| 7148 | } |
| 7149 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7150 | |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7151 | bool (CXXRecordDecl::*hasTrivial)() const; |
| 7152 | switch (member) { |
Anders Carlsson | 3b8c53b | 2010-04-22 05:40:53 +0000 | [diff] [blame] | 7153 | case CXXConstructor: |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7154 | hasTrivial = &CXXRecordDecl::hasTrivialConstructor; break; |
| 7155 | case CXXCopyConstructor: |
| 7156 | hasTrivial = &CXXRecordDecl::hasTrivialCopyConstructor; break; |
| 7157 | case CXXCopyAssignment: |
| 7158 | hasTrivial = &CXXRecordDecl::hasTrivialCopyAssignment; break; |
| 7159 | case CXXDestructor: |
| 7160 | hasTrivial = &CXXRecordDecl::hasTrivialDestructor; break; |
| 7161 | default: |
| 7162 | assert(0 && "unexpected special member"); return; |
| 7163 | } |
| 7164 | |
| 7165 | // Check for nontrivial bases (and recurse). |
| 7166 | 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] | 7167 | const RecordType *BaseRT = bi->getType()->getAs<RecordType>(); |
Sebastian Redl | 9994a34 | 2009-10-25 17:03:50 +0000 | [diff] [blame] | 7168 | assert(BaseRT && "Don't know how to handle dependent bases"); |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7169 | CXXRecordDecl *BaseRecTy = cast<CXXRecordDecl>(BaseRT->getDecl()); |
| 7170 | if (!(BaseRecTy->*hasTrivial)()) { |
| 7171 | SourceLocation BaseLoc = bi->getSourceRange().getBegin(); |
| 7172 | Diag(BaseLoc, diag::note_nontrivial_has_nontrivial) << QT << 1 << member; |
| 7173 | DiagnoseNontrivial(BaseRT, member); |
| 7174 | return; |
| 7175 | } |
| 7176 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7177 | |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7178 | // Check for nontrivial members (and recurse). |
| 7179 | typedef RecordDecl::field_iterator field_iter; |
| 7180 | for (field_iter fi = RD->field_begin(), fe = RD->field_end(); fi != fe; |
| 7181 | ++fi) { |
Douglas Gregor | 5e03f9e | 2009-07-23 23:49:00 +0000 | [diff] [blame] | 7182 | QualType EltTy = Context.getBaseElementType((*fi)->getType()); |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 7183 | if (const RecordType *EltRT = EltTy->getAs<RecordType>()) { |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 7184 | CXXRecordDecl* EltRD = cast<CXXRecordDecl>(EltRT->getDecl()); |
| 7185 | |
| 7186 | if (!(EltRD->*hasTrivial)()) { |
| 7187 | SourceLocation FLoc = (*fi)->getLocation(); |
| 7188 | Diag(FLoc, diag::note_nontrivial_has_nontrivial) << QT << 0 << member; |
| 7189 | DiagnoseNontrivial(EltRT, member); |
| 7190 | return; |
| 7191 | } |
| 7192 | } |
| 7193 | } |
| 7194 | |
| 7195 | assert(0 && "found no explanation for non-trivial member"); |
| 7196 | } |
| 7197 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7198 | /// TranslateIvarVisibility - Translate visibility from a token ID to an |
Fariborz Jahanian | 89204a1 | 2007-10-01 16:53:59 +0000 | [diff] [blame] | 7199 | /// AST enum value. |
Ted Kremenek | a526c5c | 2008-01-07 19:49:32 +0000 | [diff] [blame] | 7200 | static ObjCIvarDecl::AccessControl |
Fariborz Jahanian | 89204a1 | 2007-10-01 16:53:59 +0000 | [diff] [blame] | 7201 | TranslateIvarVisibility(tok::ObjCKeywordKind ivarVisibility) { |
Steve Naroff | f13271f | 2007-09-14 23:09:53 +0000 | [diff] [blame] | 7202 | switch (ivarVisibility) { |
Chris Lattner | 33d34a6 | 2008-10-12 00:28:42 +0000 | [diff] [blame] | 7203 | default: assert(0 && "Unknown visitibility kind"); |
| 7204 | case tok::objc_private: return ObjCIvarDecl::Private; |
| 7205 | case tok::objc_public: return ObjCIvarDecl::Public; |
| 7206 | case tok::objc_protected: return ObjCIvarDecl::Protected; |
| 7207 | case tok::objc_package: return ObjCIvarDecl::Package; |
Steve Naroff | f13271f | 2007-09-14 23:09:53 +0000 | [diff] [blame] | 7208 | } |
| 7209 | } |
| 7210 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7211 | /// 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] | 7212 | /// in order to create an IvarDecl object for it. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7213 | Decl *Sema::ActOnIvar(Scope *S, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7214 | SourceLocation DeclStart, |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7215 | Decl *IntfDecl, |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 7216 | Declarator &D, ExprTy *BitfieldWidth, |
| 7217 | tok::ObjCKeywordKind Visibility) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7218 | |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 7219 | IdentifierInfo *II = D.getIdentifier(); |
| 7220 | Expr *BitWidth = (Expr*)BitfieldWidth; |
| 7221 | SourceLocation Loc = DeclStart; |
| 7222 | if (II) Loc = D.getIdentifierLoc(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7223 | |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 7224 | // FIXME: Unnamed fields can be handled in various different ways, for |
| 7225 | // example, unnamed unions inject all members into the struct namespace! |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7226 | |
John McCall | bf1a028 | 2010-06-04 23:28:52 +0000 | [diff] [blame] | 7227 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); |
| 7228 | QualType T = TInfo->getType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7229 | |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 7230 | if (BitWidth) { |
Steve Naroff | 63359c8 | 2009-02-20 17:57:11 +0000 | [diff] [blame] | 7231 | // 6.7.2.1p3, 6.7.2.1p4 |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 7232 | if (VerifyBitField(Loc, II, T, BitWidth)) { |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 7233 | D.setInvalidType(); |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 7234 | BitWidth = 0; |
| 7235 | } |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 7236 | } else { |
| 7237 | // Not a bitfield. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7238 | |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 7239 | // validate II. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7240 | |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 7241 | } |
Fariborz Jahanian | 0b7bc8e | 2010-04-26 22:07:03 +0000 | [diff] [blame] | 7242 | if (T->isReferenceType()) { |
| 7243 | Diag(Loc, diag::err_ivar_reference_type); |
| 7244 | D.setInvalidType(); |
| 7245 | } |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 7246 | // C99 6.7.2.1p8: A member of a structure or union may have any type other |
| 7247 | // than a variably modified type. |
Fariborz Jahanian | 0b7bc8e | 2010-04-26 22:07:03 +0000 | [diff] [blame] | 7248 | else if (T->isVariablyModifiedType()) { |
Anders Carlsson | 96e05bc | 2008-12-07 00:20:55 +0000 | [diff] [blame] | 7249 | Diag(Loc, diag::err_typecheck_ivar_variable_size); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 7250 | D.setInvalidType(); |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 7251 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7252 | |
Ted Kremenek | b8db21d | 2008-07-23 18:04:17 +0000 | [diff] [blame] | 7253 | // Get the visibility (access control) for this ivar. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7254 | ObjCIvarDecl::AccessControl ac = |
Ted Kremenek | b8db21d | 2008-07-23 18:04:17 +0000 | [diff] [blame] | 7255 | Visibility != tok::objc_not_keyword ? TranslateIvarVisibility(Visibility) |
| 7256 | : ObjCIvarDecl::None; |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 7257 | // Must set ivar's DeclContext to its enclosing interface. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7258 | ObjCContainerDecl *EnclosingDecl = cast<ObjCContainerDecl>(IntfDecl); |
Daniel Dunbar | a19331f | 2010-04-02 18:29:09 +0000 | [diff] [blame] | 7259 | ObjCContainerDecl *EnclosingContext; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7260 | if (ObjCImplementationDecl *IMPDecl = |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 7261 | dyn_cast<ObjCImplementationDecl>(EnclosingDecl)) { |
Fariborz Jahanian | 000835d | 2010-08-23 18:51:39 +0000 | [diff] [blame] | 7262 | if (!LangOpts.ObjCNonFragileABI2) { |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 7263 | // 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] | 7264 | EnclosingContext = IMPDecl->getClassInterface(); |
| 7265 | assert(EnclosingContext && "Implementation has no class interface!"); |
| 7266 | } |
| 7267 | else |
| 7268 | EnclosingContext = EnclosingDecl; |
Fariborz Jahanian | 0bd0459 | 2010-04-06 22:43:48 +0000 | [diff] [blame] | 7269 | } else { |
| 7270 | if (ObjCCategoryDecl *CDecl = |
| 7271 | dyn_cast<ObjCCategoryDecl>(EnclosingDecl)) { |
| 7272 | if (!LangOpts.ObjCNonFragileABI2 || !CDecl->IsClassExtension()) { |
| 7273 | Diag(Loc, diag::err_misplaced_ivar) << CDecl->IsClassExtension(); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7274 | return 0; |
Fariborz Jahanian | 0bd0459 | 2010-04-06 22:43:48 +0000 | [diff] [blame] | 7275 | } |
| 7276 | } |
Daniel Dunbar | a19331f | 2010-04-02 18:29:09 +0000 | [diff] [blame] | 7277 | EnclosingContext = EnclosingDecl; |
Fariborz Jahanian | 0bd0459 | 2010-04-06 22:43:48 +0000 | [diff] [blame] | 7278 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7279 | |
Ted Kremenek | b8db21d | 2008-07-23 18:04:17 +0000 | [diff] [blame] | 7280 | // Construct the decl. |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 7281 | ObjCIvarDecl *NewID = ObjCIvarDecl::Create(Context, EnclosingContext, |
| 7282 | DeclStart, Loc, II, T, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 7283 | TInfo, ac, (Expr *)BitfieldWidth); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7284 | |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 7285 | if (II) { |
Douglas Gregor | c83c687 | 2010-04-15 22:33:43 +0000 | [diff] [blame] | 7286 | NamedDecl *PrevDecl = LookupSingleName(S, II, Loc, LookupMemberName, |
John McCall | 7d384dd | 2009-11-18 07:57:50 +0000 | [diff] [blame] | 7287 | ForRedeclaration); |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 7288 | if (PrevDecl && isDeclInScope(PrevDecl, EnclosingContext, S) |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 7289 | && !isa<TagDecl>(PrevDecl)) { |
| 7290 | Diag(Loc, diag::err_duplicate_member) << II; |
| 7291 | Diag(PrevDecl->getLocation(), diag::note_previous_declaration); |
| 7292 | NewID->setInvalidDecl(); |
| 7293 | } |
| 7294 | } |
| 7295 | |
Ted Kremenek | b8db21d | 2008-07-23 18:04:17 +0000 | [diff] [blame] | 7296 | // Process attributes attached to the ivar. |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 7297 | ProcessDeclAttributes(S, NewID, D); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7298 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 7299 | if (D.isInvalidType()) |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 7300 | NewID->setInvalidDecl(); |
Ted Kremenek | b8db21d | 2008-07-23 18:04:17 +0000 | [diff] [blame] | 7301 | |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 7302 | if (II) { |
| 7303 | // FIXME: When interfaces are DeclContexts, we'll need to add |
| 7304 | // these to the interface. |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7305 | S->AddDecl(NewID); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 7306 | IdResolver.AddDecl(NewID); |
| 7307 | } |
| 7308 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7309 | return NewID; |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 7310 | } |
| 7311 | |
Fariborz Jahanian | d097be8 | 2010-08-23 22:46:52 +0000 | [diff] [blame] | 7312 | /// ActOnLastBitfield - This routine handles synthesized bitfields rules for |
| 7313 | /// class and class extensions. For every class @interface and class |
| 7314 | /// extension @interface, if the last ivar is a bitfield of any type, |
| 7315 | /// then add an implicit `char :0` ivar to the end of that interface. |
| 7316 | void Sema::ActOnLastBitfield(SourceLocation DeclLoc, Decl *EnclosingDecl, |
| 7317 | llvm::SmallVectorImpl<Decl *> &AllIvarDecls) { |
| 7318 | if (!LangOpts.ObjCNonFragileABI2 || AllIvarDecls.empty()) |
| 7319 | return; |
| 7320 | |
| 7321 | Decl *ivarDecl = AllIvarDecls[AllIvarDecls.size()-1]; |
| 7322 | ObjCIvarDecl *Ivar = cast<ObjCIvarDecl>(ivarDecl); |
| 7323 | |
| 7324 | if (!Ivar->isBitField()) |
| 7325 | return; |
| 7326 | uint64_t BitFieldSize = |
| 7327 | Ivar->getBitWidth()->EvaluateAsInt(Context).getZExtValue(); |
| 7328 | if (BitFieldSize == 0) |
| 7329 | return; |
| 7330 | ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(EnclosingDecl); |
| 7331 | if (!ID) { |
| 7332 | if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(EnclosingDecl)) { |
| 7333 | if (!CD->IsClassExtension()) |
| 7334 | return; |
| 7335 | } |
| 7336 | // No need to add this to end of @implementation. |
| 7337 | else |
| 7338 | return; |
| 7339 | } |
| 7340 | // All conditions are met. Add a new bitfield to the tail end of ivars. |
| 7341 | llvm::APInt Zero(Context.getTypeSize(Context.CharTy), 0); |
Argyrios Kyrtzidis | 9996a7f | 2010-08-28 09:06:06 +0000 | [diff] [blame] | 7342 | Expr * BW = IntegerLiteral::Create(Context, Zero, Context.CharTy, DeclLoc); |
Fariborz Jahanian | d097be8 | 2010-08-23 22:46:52 +0000 | [diff] [blame] | 7343 | |
| 7344 | Ivar = ObjCIvarDecl::Create(Context, cast<ObjCContainerDecl>(EnclosingDecl), |
Abramo Bagnara | ff676cb | 2011-03-08 08:55:46 +0000 | [diff] [blame] | 7345 | DeclLoc, DeclLoc, 0, |
Fariborz Jahanian | d097be8 | 2010-08-23 22:46:52 +0000 | [diff] [blame] | 7346 | Context.CharTy, |
| 7347 | Context.CreateTypeSourceInfo(Context.CharTy), |
| 7348 | ObjCIvarDecl::Private, BW, |
| 7349 | true); |
| 7350 | AllIvarDecls.push_back(Ivar); |
| 7351 | } |
| 7352 | |
Fariborz Jahanian | 9d048ff | 2007-09-29 00:54:24 +0000 | [diff] [blame] | 7353 | void Sema::ActOnFields(Scope* S, |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7354 | SourceLocation RecLoc, Decl *EnclosingDecl, |
| 7355 | Decl **Fields, unsigned NumFields, |
Daniel Dunbar | 1bfe1c2 | 2008-10-03 02:03:53 +0000 | [diff] [blame] | 7356 | SourceLocation LBrac, SourceLocation RBrac, |
Daniel Dunbar | 7d07664 | 2008-10-03 17:33:35 +0000 | [diff] [blame] | 7357 | AttributeList *Attr) { |
Steve Naroff | 7421664 | 2007-09-14 22:20:54 +0000 | [diff] [blame] | 7358 | assert(EnclosingDecl && "missing record or interface decl"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7359 | |
Chris Lattner | 1829a6d | 2009-02-23 22:00:08 +0000 | [diff] [blame] | 7360 | // If the decl this is being inserted into is invalid, then it may be a |
| 7361 | // redeclaration or some other bogus case. Don't try to add fields to it. |
| 7362 | if (EnclosingDecl->isInvalidDecl()) { |
| 7363 | // FIXME: Deallocate fields? |
| 7364 | return; |
| 7365 | } |
| 7366 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7367 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7368 | // Verify that all the fields are okay. |
| 7369 | unsigned NumNamedMembers = 0; |
| 7370 | llvm::SmallVector<FieldDecl*, 32> RecFields; |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 7371 | |
Chris Lattner | 1829a6d | 2009-02-23 22:00:08 +0000 | [diff] [blame] | 7372 | RecordDecl *Record = dyn_cast<RecordDecl>(EnclosingDecl); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7373 | for (unsigned i = 0; i != NumFields; ++i) { |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7374 | FieldDecl *FD = cast<FieldDecl>(Fields[i]); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7375 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7376 | // Get the type for the field. |
John McCall | f4c7371 | 2011-01-19 06:33:43 +0000 | [diff] [blame] | 7377 | const Type *FDTy = FD->getType().getTypePtr(); |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 7378 | |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 7379 | if (!FD->isAnonymousStructOrUnion()) { |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 7380 | // Remember all fields written by the user. |
| 7381 | RecFields.push_back(FD); |
| 7382 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7383 | |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 7384 | // If the field is already invalid for some reason, don't emit more |
| 7385 | // diagnostics about it. |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 7386 | if (FD->isInvalidDecl()) { |
| 7387 | EnclosingDecl->setInvalidDecl(); |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 7388 | continue; |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 7389 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7390 | |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 7391 | // C99 6.7.2.1p2: |
| 7392 | // A structure or union shall not contain a member with |
| 7393 | // incomplete or function type (hence, a structure shall not |
| 7394 | // contain an instance of itself, but may contain a pointer to |
| 7395 | // an instance of itself), except that the last member of a |
| 7396 | // structure with more than one named member may have incomplete |
| 7397 | // array type; such a structure (and any union containing, |
| 7398 | // possibly recursively, a member that is such a structure) |
| 7399 | // shall not be a member of a structure or an element of an |
| 7400 | // array. |
Chris Lattner | 02c642e | 2007-07-31 21:33:24 +0000 | [diff] [blame] | 7401 | if (FDTy->isFunctionType()) { |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 7402 | // Field declared as a function. |
Chris Lattner | f3a41af | 2008-11-20 06:38:18 +0000 | [diff] [blame] | 7403 | Diag(FD->getLocation(), diag::err_field_declared_as_function) |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 7404 | << FD->getDeclName(); |
Steve Naroff | 7421664 | 2007-09-14 22:20:54 +0000 | [diff] [blame] | 7405 | FD->setInvalidDecl(); |
| 7406 | EnclosingDecl->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7407 | continue; |
Francois Pichet | 0924618 | 2010-09-15 00:14:08 +0000 | [diff] [blame] | 7408 | } else if (FDTy->isIncompleteArrayType() && Record && |
| 7409 | ((i == NumFields - 1 && !Record->isUnion()) || |
Argyrios Kyrtzidis | d97cec3 | 2011-03-07 20:04:04 +0000 | [diff] [blame] | 7410 | ((getLangOptions().Microsoft || getLangOptions().CPlusPlus) && |
Francois Pichet | 0924618 | 2010-09-15 00:14:08 +0000 | [diff] [blame] | 7411 | (i == NumFields - 1 || Record->isUnion())))) { |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 7412 | // Flexible array member. |
Argyrios Kyrtzidis | d97cec3 | 2011-03-07 20:04:04 +0000 | [diff] [blame] | 7413 | // Microsoft and g++ is more permissive regarding flexible array. |
Francois Pichet | 0924618 | 2010-09-15 00:14:08 +0000 | [diff] [blame] | 7414 | // It will accept flexible array in union and also |
Anders Carlsson | 4d09e84 | 2010-10-17 23:36:12 +0000 | [diff] [blame] | 7415 | // as the sole element of a struct/class. |
Francois Pichet | 0924618 | 2010-09-15 00:14:08 +0000 | [diff] [blame] | 7416 | if (getLangOptions().Microsoft) { |
| 7417 | if (Record->isUnion()) |
Argyrios Kyrtzidis | d97cec3 | 2011-03-07 20:04:04 +0000 | [diff] [blame] | 7418 | Diag(FD->getLocation(), diag::ext_flexible_array_union_ms) |
Francois Pichet | 0924618 | 2010-09-15 00:14:08 +0000 | [diff] [blame] | 7419 | << FD->getDeclName(); |
| 7420 | else if (NumFields == 1) |
Argyrios Kyrtzidis | d97cec3 | 2011-03-07 20:04:04 +0000 | [diff] [blame] | 7421 | Diag(FD->getLocation(), diag::ext_flexible_array_empty_aggregate_ms) |
Francois Pichet | 0924618 | 2010-09-15 00:14:08 +0000 | [diff] [blame] | 7422 | << FD->getDeclName() << Record->getTagKind(); |
Argyrios Kyrtzidis | d97cec3 | 2011-03-07 20:04:04 +0000 | [diff] [blame] | 7423 | } else if (getLangOptions().CPlusPlus) { |
| 7424 | if (Record->isUnion()) |
| 7425 | Diag(FD->getLocation(), diag::ext_flexible_array_union_gnu) |
| 7426 | << FD->getDeclName(); |
| 7427 | else if (NumFields == 1) |
| 7428 | Diag(FD->getLocation(), diag::ext_flexible_array_empty_aggregate_gnu) |
| 7429 | << FD->getDeclName() << Record->getTagKind(); |
| 7430 | } else if (NumNamedMembers < 1) { |
Chris Lattner | f3a41af | 2008-11-20 06:38:18 +0000 | [diff] [blame] | 7431 | Diag(FD->getLocation(), diag::err_flexible_array_empty_struct) |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 7432 | << FD->getDeclName(); |
Steve Naroff | 7421664 | 2007-09-14 22:20:54 +0000 | [diff] [blame] | 7433 | FD->setInvalidDecl(); |
| 7434 | EnclosingDecl->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7435 | continue; |
| 7436 | } |
Fariborz Jahanian | 4142ceb | 2010-05-26 20:19:07 +0000 | [diff] [blame] | 7437 | if (!FD->getType()->isDependentType() && |
| 7438 | !Context.getBaseElementType(FD->getType())->isPODType()) { |
| 7439 | Diag(FD->getLocation(), diag::err_flexible_array_has_nonpod_type) |
Fariborz Jahanian | 2c0a540 | 2010-05-26 20:46:24 +0000 | [diff] [blame] | 7440 | << FD->getDeclName() << FD->getType(); |
Fariborz Jahanian | 4142ceb | 2010-05-26 20:19:07 +0000 | [diff] [blame] | 7441 | FD->setInvalidDecl(); |
| 7442 | EnclosingDecl->setInvalidDecl(); |
| 7443 | continue; |
| 7444 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7445 | // 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] | 7446 | if (Record) |
| 7447 | Record->setHasFlexibleArrayMember(true); |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 7448 | } else if (!FDTy->isDependentType() && |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7449 | RequireCompleteType(FD->getLocation(), FD->getType(), |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 7450 | diag::err_field_incomplete)) { |
| 7451 | // Incomplete type |
| 7452 | FD->setInvalidDecl(); |
| 7453 | EnclosingDecl->setInvalidDecl(); |
| 7454 | continue; |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 7455 | } else if (const RecordType *FDTTy = FDTy->getAs<RecordType>()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7456 | if (FDTTy->getDecl()->hasFlexibleArrayMember()) { |
| 7457 | // 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] | 7458 | if (Record && Record->isUnion()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7459 | Record->setHasFlexibleArrayMember(true); |
| 7460 | } else { |
| 7461 | // If this is a struct/class and this is not the last element, reject |
| 7462 | // it. Note that GCC supports variable sized arrays in the middle of |
| 7463 | // structures. |
Douglas Gregor | e4f3e06 | 2009-03-06 23:41:27 +0000 | [diff] [blame] | 7464 | if (i != NumFields-1) |
| 7465 | Diag(FD->getLocation(), diag::ext_variable_sized_type_in_struct) |
Chris Lattner | 740782a | 2009-04-25 18:52:45 +0000 | [diff] [blame] | 7466 | << FD->getDeclName() << FD->getType(); |
Douglas Gregor | e4f3e06 | 2009-03-06 23:41:27 +0000 | [diff] [blame] | 7467 | else { |
| 7468 | // We support flexible arrays at the end of structs in |
| 7469 | // other structs as an extension. |
| 7470 | Diag(FD->getLocation(), diag::ext_flexible_array_in_struct) |
| 7471 | << FD->getDeclName(); |
| 7472 | if (Record) |
| 7473 | Record->setHasFlexibleArrayMember(true); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7474 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7475 | } |
| 7476 | } |
Fariborz Jahanian | 082b02e | 2009-07-08 01:18:33 +0000 | [diff] [blame] | 7477 | if (Record && FDTTy->getDecl()->hasObjectMember()) |
| 7478 | Record->setHasObjectMember(true); |
John McCall | c12c5bb | 2010-05-15 11:32:37 +0000 | [diff] [blame] | 7479 | } else if (FDTy->isObjCObjectType()) { |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 7480 | /// A field cannot be an Objective-c object |
Steve Naroff | ccef371 | 2009-02-20 22:59:16 +0000 | [diff] [blame] | 7481 | Diag(FD->getLocation(), diag::err_statically_allocated_object); |
Fariborz Jahanian | e7f64cc | 2007-10-12 22:10:42 +0000 | [diff] [blame] | 7482 | FD->setInvalidDecl(); |
| 7483 | EnclosingDecl->setInvalidDecl(); |
| 7484 | continue; |
Mike Stump | ac5fc7c | 2009-08-04 21:02:39 +0000 | [diff] [blame] | 7485 | } else if (getLangOptions().ObjC1 && |
| 7486 | getLangOptions().getGCMode() != LangOptions::NonGC && |
| 7487 | Record && |
| 7488 | (FD->getType()->isObjCObjectPointerType() || |
| 7489 | FD->getType().isObjCGCStrong())) |
Fariborz Jahanian | 082b02e | 2009-07-08 01:18:33 +0000 | [diff] [blame] | 7490 | Record->setHasObjectMember(true); |
Fariborz Jahanian | 55bcace | 2010-06-15 22:44:06 +0000 | [diff] [blame] | 7491 | else if (Context.getAsArrayType(FD->getType())) { |
| 7492 | QualType BaseType = Context.getBaseElementType(FD->getType()); |
| 7493 | if (Record && BaseType->isRecordType() && |
| 7494 | BaseType->getAs<RecordType>()->getDecl()->hasObjectMember()) |
| 7495 | Record->setHasObjectMember(true); |
| 7496 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7497 | // Keep track of the number of named members. |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 7498 | if (FD->getIdentifier()) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7499 | ++NumNamedMembers; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7500 | } |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 7501 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7502 | // Okay, we successfully defined 'Record'. |
Chris Lattner | e1e7985 | 2008-02-06 00:51:33 +0000 | [diff] [blame] | 7503 | if (Record) { |
Douglas Gregor | 7a39dd0 | 2010-09-29 00:15:42 +0000 | [diff] [blame] | 7504 | bool Completed = false; |
| 7505 | if (CXXRecordDecl *CXXRecord = dyn_cast<CXXRecordDecl>(Record)) { |
| 7506 | if (!CXXRecord->isInvalidDecl()) { |
| 7507 | // Set access bits correctly on the directly-declared conversions. |
| 7508 | UnresolvedSetImpl *Convs = CXXRecord->getConversionFunctions(); |
| 7509 | for (UnresolvedSetIterator I = Convs->begin(), E = Convs->end(); |
| 7510 | I != E; ++I) |
| 7511 | Convs->setAccess(I, (*I)->getAccess()); |
| 7512 | |
| 7513 | if (!CXXRecord->isDependentType()) { |
| 7514 | // Add any implicitly-declared members to this class. |
| 7515 | AddImplicitlyDeclaredMembersToClass(CXXRecord); |
| 7516 | |
| 7517 | // If we have virtual base classes, we may end up finding multiple |
| 7518 | // final overriders for a given virtual function. Check for this |
| 7519 | // problem now. |
| 7520 | if (CXXRecord->getNumVBases()) { |
| 7521 | CXXFinalOverriderMap FinalOverriders; |
| 7522 | CXXRecord->getFinalOverriders(FinalOverriders); |
| 7523 | |
| 7524 | for (CXXFinalOverriderMap::iterator M = FinalOverriders.begin(), |
| 7525 | MEnd = FinalOverriders.end(); |
| 7526 | M != MEnd; ++M) { |
| 7527 | for (OverridingMethods::iterator SO = M->second.begin(), |
| 7528 | SOEnd = M->second.end(); |
| 7529 | SO != SOEnd; ++SO) { |
| 7530 | assert(SO->second.size() > 0 && |
| 7531 | "Virtual function without overridding functions?"); |
| 7532 | if (SO->second.size() == 1) |
| 7533 | continue; |
| 7534 | |
| 7535 | // C++ [class.virtual]p2: |
| 7536 | // In a derived class, if a virtual member function of a base |
| 7537 | // class subobject has more than one final overrider the |
| 7538 | // program is ill-formed. |
| 7539 | Diag(Record->getLocation(), diag::err_multiple_final_overriders) |
| 7540 | << (NamedDecl *)M->first << Record; |
| 7541 | Diag(M->first->getLocation(), |
| 7542 | diag::note_overridden_virtual_function); |
| 7543 | for (OverridingMethods::overriding_iterator |
| 7544 | OM = SO->second.begin(), |
| 7545 | OMEnd = SO->second.end(); |
| 7546 | OM != OMEnd; ++OM) |
| 7547 | Diag(OM->Method->getLocation(), diag::note_final_overrider) |
| 7548 | << (NamedDecl *)M->first << OM->Method->getParent(); |
| 7549 | |
| 7550 | Record->setInvalidDecl(); |
| 7551 | } |
| 7552 | } |
| 7553 | CXXRecord->completeDefinition(&FinalOverriders); |
| 7554 | Completed = true; |
| 7555 | } |
| 7556 | } |
| 7557 | } |
| 7558 | } |
| 7559 | |
| 7560 | if (!Completed) |
| 7561 | Record->completeDefinition(); |
Chris Lattner | e1e7985 | 2008-02-06 00:51:33 +0000 | [diff] [blame] | 7562 | } else { |
Jay Foad | beaaccd | 2009-05-21 09:52:38 +0000 | [diff] [blame] | 7563 | ObjCIvarDecl **ClsFields = |
| 7564 | reinterpret_cast<ObjCIvarDecl**>(RecFields.data()); |
Fariborz Jahanian | 60f8c86 | 2008-12-13 20:28:25 +0000 | [diff] [blame] | 7565 | if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(EnclosingDecl)) { |
Chris Lattner | 38af2de | 2009-02-20 21:35:13 +0000 | [diff] [blame] | 7566 | ID->setLocEnd(RBrac); |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 7567 | // Add ivar's to class's DeclContext. |
| 7568 | for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { |
| 7569 | ClsFields[i]->setLexicalDeclContext(ID); |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 7570 | ID->addDecl(ClsFields[i]); |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 7571 | } |
Fariborz Jahanian | 3281eff | 2008-12-16 01:08:35 +0000 | [diff] [blame] | 7572 | // Must enforce the rule that ivars in the base classes may not be |
| 7573 | // duplicates. |
Fariborz Jahanian | f914b97 | 2010-02-23 23:41:11 +0000 | [diff] [blame] | 7574 | if (ID->getSuperClass()) |
| 7575 | DiagnoseDuplicateIvars(ID, ID->getSuperClass()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7576 | } else if (ObjCImplementationDecl *IMPDecl = |
Chris Lattner | 1829a6d | 2009-02-23 22:00:08 +0000 | [diff] [blame] | 7577 | dyn_cast<ObjCImplementationDecl>(EnclosingDecl)) { |
Ted Kremenek | a526c5c | 2008-01-07 19:49:32 +0000 | [diff] [blame] | 7578 | assert(IMPDecl && "ActOnFields - missing ObjCImplementationDecl"); |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 7579 | for (unsigned I = 0, N = RecFields.size(); I != N; ++I) |
| 7580 | // Ivar declared in @implementation never belongs to the implementation. |
| 7581 | // Only it is in implementation's lexical context. |
Douglas Gregor | 8f36aba | 2009-04-23 03:23:08 +0000 | [diff] [blame] | 7582 | ClsFields[I]->setLexicalDeclContext(IMPDecl); |
Fariborz Jahanian | 3a3ca1b | 2007-10-31 18:48:14 +0000 | [diff] [blame] | 7583 | CheckImplementationIvars(IMPDecl, ClsFields, RecFields.size(), RBrac); |
Fariborz Jahanian | 83c481a | 2010-02-22 23:04:20 +0000 | [diff] [blame] | 7584 | } else if (ObjCCategoryDecl *CDecl = |
| 7585 | dyn_cast<ObjCCategoryDecl>(EnclosingDecl)) { |
Fariborz Jahanian | 0bd0459 | 2010-04-06 22:43:48 +0000 | [diff] [blame] | 7586 | // case of ivars in class extension; all other cases have been |
| 7587 | // reported as errors elsewhere. |
| 7588 | // FIXME. Class extension does not have a LocEnd field. |
| 7589 | // CDecl->setLocEnd(RBrac); |
| 7590 | // Add ivar's to class extension's DeclContext. |
| 7591 | for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { |
| 7592 | ClsFields[i]->setLexicalDeclContext(CDecl); |
| 7593 | CDecl->addDecl(ClsFields[i]); |
Fariborz Jahanian | 83c481a | 2010-02-22 23:04:20 +0000 | [diff] [blame] | 7594 | } |
Fariborz Jahanian | d0b90bf | 2007-09-26 18:27:25 +0000 | [diff] [blame] | 7595 | } |
Fariborz Jahanian | b04a021 | 2007-09-14 21:08:27 +0000 | [diff] [blame] | 7596 | } |
Daniel Dunbar | 7d07664 | 2008-10-03 17:33:35 +0000 | [diff] [blame] | 7597 | |
| 7598 | if (Attr) |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 7599 | ProcessDeclAttributeList(S, Record, Attr); |
Eli Friedman | aa8b0d1 | 2010-08-05 06:57:20 +0000 | [diff] [blame] | 7600 | |
| 7601 | // If there's a #pragma GCC visibility in scope, and this isn't a subclass, |
| 7602 | // set the visibility of this record. |
| 7603 | if (Record && !Record->getDeclContext()->isRecord()) |
| 7604 | AddPushedVisibilityAttribute(Record); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7605 | } |
| 7606 | |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 7607 | /// \brief Determine whether the given integral value is representable within |
| 7608 | /// the given type T. |
| 7609 | static bool isRepresentableIntegerValue(ASTContext &Context, |
| 7610 | llvm::APSInt &Value, |
| 7611 | QualType T) { |
Douglas Gregor | 9d3347a | 2010-06-16 00:35:25 +0000 | [diff] [blame] | 7612 | assert(T->isIntegralType(Context) && "Integral type required!"); |
Douglas Gregor | af68d4e | 2010-04-15 15:53:31 +0000 | [diff] [blame] | 7613 | unsigned BitWidth = Context.getIntWidth(T); |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 7614 | |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 7615 | if (Value.isUnsigned() || Value.isNonNegative()) { |
| 7616 | if (T->isSignedIntegerType()) |
| 7617 | --BitWidth; |
| 7618 | return Value.getActiveBits() <= BitWidth; |
| 7619 | } |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 7620 | return Value.getMinSignedBits() <= BitWidth; |
| 7621 | } |
| 7622 | |
| 7623 | // \brief Given an integral type, return the next larger integral type |
| 7624 | // (or a NULL type of no such type exists). |
| 7625 | static QualType getNextLargerIntegralType(ASTContext &Context, QualType T) { |
| 7626 | // FIXME: Int128/UInt128 support, which also needs to be introduced into |
| 7627 | // enum checking below. |
Douglas Gregor | 9d3347a | 2010-06-16 00:35:25 +0000 | [diff] [blame] | 7628 | assert(T->isIntegralType(Context) && "Integral type required!"); |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 7629 | const unsigned NumTypes = 4; |
| 7630 | QualType SignedIntegralTypes[NumTypes] = { |
| 7631 | Context.ShortTy, Context.IntTy, Context.LongTy, Context.LongLongTy |
| 7632 | }; |
| 7633 | QualType UnsignedIntegralTypes[NumTypes] = { |
| 7634 | Context.UnsignedShortTy, Context.UnsignedIntTy, Context.UnsignedLongTy, |
| 7635 | Context.UnsignedLongLongTy |
| 7636 | }; |
| 7637 | |
| 7638 | unsigned BitWidth = Context.getTypeSize(T); |
| 7639 | QualType *Types = T->isSignedIntegerType()? SignedIntegralTypes |
| 7640 | : UnsignedIntegralTypes; |
| 7641 | for (unsigned I = 0; I != NumTypes; ++I) |
| 7642 | if (Context.getTypeSize(Types[I]) > BitWidth) |
| 7643 | return Types[I]; |
| 7644 | |
| 7645 | return QualType(); |
| 7646 | } |
| 7647 | |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 7648 | EnumConstantDecl *Sema::CheckEnumConstant(EnumDecl *Enum, |
| 7649 | EnumConstantDecl *LastEnumConst, |
| 7650 | SourceLocation IdLoc, |
| 7651 | IdentifierInfo *Id, |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 7652 | Expr *Val) { |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 7653 | unsigned IntWidth = Context.Target.getIntWidth(); |
| 7654 | llvm::APSInt EnumVal(IntWidth); |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 7655 | QualType EltTy; |
Douglas Gregor | 0c9e479 | 2010-12-16 00:24:44 +0000 | [diff] [blame] | 7656 | |
| 7657 | if (Val && DiagnoseUnexpandedParameterPack(Val, UPPC_EnumeratorValue)) |
| 7658 | Val = 0; |
| 7659 | |
Douglas Gregor | 4912c34 | 2009-11-06 00:03:12 +0000 | [diff] [blame] | 7660 | if (Val) { |
Douglas Gregor | 9b9edd6 | 2010-03-02 17:53:14 +0000 | [diff] [blame] | 7661 | if (Enum->isDependentType() || Val->isTypeDependent()) |
Douglas Gregor | 4912c34 | 2009-11-06 00:03:12 +0000 | [diff] [blame] | 7662 | EltTy = Context.DependentTy; |
| 7663 | else { |
Douglas Gregor | 4912c34 | 2009-11-06 00:03:12 +0000 | [diff] [blame] | 7664 | // C99 6.7.2.2p2: Make sure we have an integer constant expression. |
| 7665 | SourceLocation ExpLoc; |
Douglas Gregor | 9b9edd6 | 2010-03-02 17:53:14 +0000 | [diff] [blame] | 7666 | if (!Val->isValueDependent() && |
| 7667 | VerifyIntegerConstantExpression(Val, &EnumVal)) { |
Douglas Gregor | 4912c34 | 2009-11-06 00:03:12 +0000 | [diff] [blame] | 7668 | Val = 0; |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 7669 | } else { |
| 7670 | if (!getLangOptions().CPlusPlus) { |
| 7671 | // C99 6.7.2.2p2: |
| 7672 | // The expression that defines the value of an enumeration constant |
| 7673 | // shall be an integer constant expression that has a value |
| 7674 | // representable as an int. |
| 7675 | |
| 7676 | // Complain if the value is not representable in an int. |
| 7677 | if (!isRepresentableIntegerValue(Context, EnumVal, Context.IntTy)) |
| 7678 | Diag(IdLoc, diag::ext_enum_value_not_int) |
| 7679 | << EnumVal.toString(10) << Val->getSourceRange() |
Douglas Gregor | 19c1525 | 2010-02-17 22:40:11 +0000 | [diff] [blame] | 7680 | << (EnumVal.isUnsigned() || EnumVal.isNonNegative()); |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 7681 | else if (!Context.hasSameType(Val->getType(), Context.IntTy)) { |
| 7682 | // Force the type of the expression to 'int'. |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 7683 | ImpCastExprToType(Val, Context.IntTy, CK_IntegralCast); |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 7684 | } |
| 7685 | } |
| 7686 | |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 7687 | if (Enum->isFixed()) { |
| 7688 | EltTy = Enum->getIntegerType(); |
| 7689 | |
| 7690 | // C++0x [dcl.enum]p5: |
| 7691 | // ... if the initializing value of an enumerator cannot be |
| 7692 | // represented by the underlying type, the program is ill-formed. |
Francois Pichet | 842e7a2 | 2010-10-18 15:01:13 +0000 | [diff] [blame] | 7693 | if (!isRepresentableIntegerValue(Context, EnumVal, EltTy)) { |
| 7694 | if (getLangOptions().Microsoft) { |
| 7695 | Diag(IdLoc, diag::ext_enumerator_too_large) << EltTy; |
| 7696 | ImpCastExprToType(Val, EltTy, CK_IntegralCast); |
| 7697 | } else |
| 7698 | Diag(IdLoc, diag::err_enumerator_too_large) |
| 7699 | << EltTy; |
| 7700 | } else |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 7701 | ImpCastExprToType(Val, EltTy, CK_IntegralCast); |
| 7702 | } |
| 7703 | else { |
| 7704 | // C++0x [dcl.enum]p5: |
| 7705 | // If the underlying type is not fixed, the type of each enumerator |
| 7706 | // is the type of its initializing value: |
| 7707 | // - If an initializer is specified for an enumerator, the |
| 7708 | // initializing value has the same type as the expression. |
| 7709 | EltTy = Val->getType(); |
| 7710 | } |
Douglas Gregor | 4912c34 | 2009-11-06 00:03:12 +0000 | [diff] [blame] | 7711 | } |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 7712 | } |
| 7713 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7714 | |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 7715 | if (!Val) { |
Eli Friedman | ed0716b | 2009-12-11 01:34:50 +0000 | [diff] [blame] | 7716 | if (Enum->isDependentType()) |
| 7717 | EltTy = Context.DependentTy; |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 7718 | else if (!LastEnumConst) { |
| 7719 | // C++0x [dcl.enum]p5: |
| 7720 | // If the underlying type is not fixed, the type of each enumerator |
| 7721 | // is the type of its initializing value: |
| 7722 | // - If no initializer is specified for the first enumerator, the |
| 7723 | // initializing value has an unspecified integral type. |
| 7724 | // |
| 7725 | // GCC uses 'int' for its unspecified integral type, as does |
| 7726 | // C99 6.7.2.2p3. |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 7727 | if (Enum->isFixed()) { |
| 7728 | EltTy = Enum->getIntegerType(); |
| 7729 | } |
| 7730 | else { |
| 7731 | EltTy = Context.IntTy; |
| 7732 | } |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 7733 | } else { |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 7734 | // Assign the last value + 1. |
| 7735 | EnumVal = LastEnumConst->getInitVal(); |
| 7736 | ++EnumVal; |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 7737 | EltTy = LastEnumConst->getType(); |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 7738 | |
| 7739 | // Check for overflow on increment. |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 7740 | if (EnumVal < LastEnumConst->getInitVal()) { |
| 7741 | // C++0x [dcl.enum]p5: |
| 7742 | // If the underlying type is not fixed, the type of each enumerator |
| 7743 | // is the type of its initializing value: |
| 7744 | // |
| 7745 | // - Otherwise the type of the initializing value is the same as |
| 7746 | // the type of the initializing value of the preceding enumerator |
| 7747 | // unless the incremented value is not representable in that type, |
| 7748 | // in which case the type is an unspecified integral type |
| 7749 | // sufficient to contain the incremented value. If no such type |
| 7750 | // exists, the program is ill-formed. |
| 7751 | QualType T = getNextLargerIntegralType(Context, EltTy); |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 7752 | if (T.isNull() || Enum->isFixed()) { |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 7753 | // There is no integral type larger enough to represent this |
| 7754 | // value. Complain, then allow the value to wrap around. |
| 7755 | EnumVal = LastEnumConst->getInitVal(); |
Jay Foad | 9f71a8f | 2010-12-07 08:25:34 +0000 | [diff] [blame] | 7756 | EnumVal = EnumVal.zext(EnumVal.getBitWidth() * 2); |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 7757 | ++EnumVal; |
| 7758 | if (Enum->isFixed()) |
| 7759 | // When the underlying type is fixed, this is ill-formed. |
| 7760 | Diag(IdLoc, diag::err_enumerator_wrapped) |
| 7761 | << EnumVal.toString(10) |
| 7762 | << EltTy; |
| 7763 | else |
| 7764 | Diag(IdLoc, diag::warn_enumerator_too_large) |
| 7765 | << EnumVal.toString(10); |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 7766 | } else { |
| 7767 | EltTy = T; |
| 7768 | } |
| 7769 | |
| 7770 | // Retrieve the last enumerator's value, extent that type to the |
| 7771 | // type that is supposed to be large enough to represent the incremented |
| 7772 | // value, then increment. |
| 7773 | EnumVal = LastEnumConst->getInitVal(); |
| 7774 | EnumVal.setIsSigned(EltTy->isSignedIntegerType()); |
Jay Foad | 9f71a8f | 2010-12-07 08:25:34 +0000 | [diff] [blame] | 7775 | EnumVal = EnumVal.zextOrTrunc(Context.getIntWidth(EltTy)); |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 7776 | ++EnumVal; |
| 7777 | |
| 7778 | // If we're not in C++, diagnose the overflow of enumerator values, |
| 7779 | // which in C99 means that the enumerator value is not representable in |
| 7780 | // an int (C99 6.7.2.2p2). However, we support GCC's extension that |
| 7781 | // permits enumerator values that are representable in some larger |
| 7782 | // integral type. |
| 7783 | if (!getLangOptions().CPlusPlus && !T.isNull()) |
| 7784 | Diag(IdLoc, diag::warn_enum_value_overflow); |
| 7785 | } else if (!getLangOptions().CPlusPlus && |
| 7786 | !isRepresentableIntegerValue(Context, EnumVal, EltTy)) { |
| 7787 | // Enforce C99 6.7.2.2p2 even when we compute the next value. |
| 7788 | Diag(IdLoc, diag::ext_enum_value_not_int) |
| 7789 | << EnumVal.toString(10) << 1; |
| 7790 | } |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 7791 | } |
| 7792 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7793 | |
Douglas Gregor | 9b9edd6 | 2010-03-02 17:53:14 +0000 | [diff] [blame] | 7794 | if (!EltTy->isDependentType()) { |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 7795 | // Make the enumerator value match the signedness and size of the |
| 7796 | // enumerator's type. |
Jay Foad | 9f71a8f | 2010-12-07 08:25:34 +0000 | [diff] [blame] | 7797 | EnumVal = EnumVal.zextOrTrunc(Context.getIntWidth(EltTy)); |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 7798 | EnumVal.setIsSigned(EltTy->isSignedIntegerType()); |
| 7799 | } |
Douglas Gregor | 4912c34 | 2009-11-06 00:03:12 +0000 | [diff] [blame] | 7800 | |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 7801 | return EnumConstantDecl::Create(Context, Enum, IdLoc, Id, EltTy, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7802 | Val, EnumVal); |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 7803 | } |
| 7804 | |
| 7805 | |
John McCall | 5b629aa | 2010-10-22 23:36:17 +0000 | [diff] [blame] | 7806 | Decl *Sema::ActOnEnumConstant(Scope *S, Decl *theEnumDecl, Decl *lastEnumConst, |
| 7807 | SourceLocation IdLoc, IdentifierInfo *Id, |
| 7808 | AttributeList *Attr, |
| 7809 | SourceLocation EqualLoc, ExprTy *val) { |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7810 | EnumDecl *TheEnumDecl = cast<EnumDecl>(theEnumDecl); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7811 | EnumConstantDecl *LastEnumConst = |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7812 | cast_or_null<EnumConstantDecl>(lastEnumConst); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7813 | Expr *Val = static_cast<Expr*>(val); |
| 7814 | |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 7815 | // The scope passed in may not be a decl scope. Zip up the scope tree until |
| 7816 | // we find one that is. |
Douglas Gregor | 1a0d31a | 2009-01-12 18:45:55 +0000 | [diff] [blame] | 7817 | S = getNonFieldDeclScope(S); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7818 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7819 | // Verify that there isn't already something declared with this name in this |
| 7820 | // scope. |
Douglas Gregor | c83c687 | 2010-04-15 22:33:43 +0000 | [diff] [blame] | 7821 | NamedDecl *PrevDecl = LookupSingleName(S, Id, IdLoc, LookupOrdinaryName, |
Douglas Gregor | e39fe72 | 2010-01-19 06:06:57 +0000 | [diff] [blame] | 7822 | ForRedeclaration); |
Douglas Gregor | f57172b | 2008-12-08 18:40:42 +0000 | [diff] [blame] | 7823 | if (PrevDecl && PrevDecl->isTemplateParameter()) { |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 7824 | // Maybe we will complain about the shadowed template parameter. |
| 7825 | DiagnoseTemplateParameterShadow(IdLoc, PrevDecl); |
| 7826 | // Just pretend that we didn't see the previous declaration. |
| 7827 | PrevDecl = 0; |
| 7828 | } |
| 7829 | |
| 7830 | if (PrevDecl) { |
Argyrios Kyrtzidis | 0ff12f0 | 2008-07-16 21:01:53 +0000 | [diff] [blame] | 7831 | // When in C++, we may get a TagDecl with the same name; in this case the |
| 7832 | // enum constant will 'hide' the tag. |
| 7833 | assert((getLangOptions().CPlusPlus || !isa<TagDecl>(PrevDecl)) && |
| 7834 | "Received TagDecl when not in C++!"); |
Argyrios Kyrtzidis | 15a12d0 | 2008-09-09 21:18:04 +0000 | [diff] [blame] | 7835 | if (!isa<TagDecl>(PrevDecl) && isDeclInScope(PrevDecl, CurContext, S)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7836 | if (isa<EnumConstantDecl>(PrevDecl)) |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 7837 | Diag(IdLoc, diag::err_redefinition_of_enumerator) << Id; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7838 | else |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 7839 | Diag(IdLoc, diag::err_redefinition) << Id; |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 7840 | Diag(PrevDecl->getLocation(), diag::note_previous_definition); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7841 | return 0; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7842 | } |
| 7843 | } |
| 7844 | |
Douglas Gregor | a6e937c | 2010-10-15 13:21:21 +0000 | [diff] [blame] | 7845 | // C++ [class.mem]p13: |
| 7846 | // If T is the name of a class, then each of the following shall have a |
| 7847 | // name different from T: |
| 7848 | // - every enumerator of every member of class T that is an enumerated |
| 7849 | // type |
| 7850 | if (CXXRecordDecl *Record |
| 7851 | = dyn_cast<CXXRecordDecl>( |
| 7852 | TheEnumDecl->getDeclContext()->getRedeclContext())) |
| 7853 | if (Record->getIdentifier() && Record->getIdentifier() == Id) |
| 7854 | Diag(IdLoc, diag::err_member_name_of_class) << Id; |
| 7855 | |
John McCall | 5b629aa | 2010-10-22 23:36:17 +0000 | [diff] [blame] | 7856 | EnumConstantDecl *New = |
| 7857 | CheckEnumConstant(TheEnumDecl, LastEnumConst, IdLoc, Id, Val); |
Chris Lattner | 421a23d | 2007-08-27 21:16:18 +0000 | [diff] [blame] | 7858 | |
John McCall | 92f8831 | 2010-01-23 00:46:32 +0000 | [diff] [blame] | 7859 | if (New) { |
John McCall | 5b629aa | 2010-10-22 23:36:17 +0000 | [diff] [blame] | 7860 | // Process attributes. |
| 7861 | if (Attr) ProcessDeclAttributeList(S, New, Attr); |
| 7862 | |
| 7863 | // Register this decl in the current scope stack. |
John McCall | 92f8831 | 2010-01-23 00:46:32 +0000 | [diff] [blame] | 7864 | New->setAccess(TheEnumDecl->getAccess()); |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 7865 | PushOnScopeChains(New, S); |
John McCall | 92f8831 | 2010-01-23 00:46:32 +0000 | [diff] [blame] | 7866 | } |
Douglas Gregor | 45579f5 | 2008-12-17 02:04:30 +0000 | [diff] [blame] | 7867 | |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7868 | return New; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7869 | } |
| 7870 | |
Mike Stump | c6e35aa | 2009-05-16 07:06:02 +0000 | [diff] [blame] | 7871 | void Sema::ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7872 | SourceLocation RBraceLoc, Decl *EnumDeclX, |
| 7873 | Decl **Elements, unsigned NumElements, |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 7874 | Scope *S, AttributeList *Attr) { |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7875 | EnumDecl *Enum = cast<EnumDecl>(EnumDeclX); |
Douglas Gregor | 074149e | 2009-01-05 19:45:36 +0000 | [diff] [blame] | 7876 | QualType EnumType = Context.getTypeDeclType(Enum); |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 7877 | |
| 7878 | if (Attr) |
| 7879 | ProcessDeclAttributeList(S, Enum, Attr); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7880 | |
Eli Friedman | ed0716b | 2009-12-11 01:34:50 +0000 | [diff] [blame] | 7881 | if (Enum->isDependentType()) { |
| 7882 | for (unsigned i = 0; i != NumElements; ++i) { |
| 7883 | EnumConstantDecl *ECD = |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7884 | cast_or_null<EnumConstantDecl>(Elements[i]); |
Eli Friedman | ed0716b | 2009-12-11 01:34:50 +0000 | [diff] [blame] | 7885 | if (!ECD) continue; |
| 7886 | |
| 7887 | ECD->setType(EnumType); |
| 7888 | } |
| 7889 | |
John McCall | 1b5a618 | 2010-05-06 08:49:23 +0000 | [diff] [blame] | 7890 | Enum->completeDefinition(Context.DependentTy, Context.DependentTy, 0, 0); |
Eli Friedman | ed0716b | 2009-12-11 01:34:50 +0000 | [diff] [blame] | 7891 | return; |
| 7892 | } |
| 7893 | |
Chris Lattner | e37f0be | 2007-08-28 05:10:31 +0000 | [diff] [blame] | 7894 | // TODO: If the result value doesn't fit in an int, it must be a long or long |
| 7895 | // long value. ISO C does not support this, but GCC does as an extension, |
| 7896 | // emit a warning. |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 7897 | unsigned IntWidth = Context.Target.getIntWidth(); |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 7898 | unsigned CharWidth = Context.Target.getCharWidth(); |
| 7899 | unsigned ShortWidth = Context.Target.getShortWidth(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7900 | |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 7901 | // Verify that all the values are okay, compute the size of the values, and |
| 7902 | // reverse the list. |
| 7903 | unsigned NumNegativeBits = 0; |
| 7904 | unsigned NumPositiveBits = 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7905 | |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 7906 | // Keep track of whether all elements have type int. |
| 7907 | bool AllElementsInt = true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7908 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7909 | for (unsigned i = 0; i != NumElements; ++i) { |
| 7910 | EnumConstantDecl *ECD = |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 7911 | cast_or_null<EnumConstantDecl>(Elements[i]); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7912 | if (!ECD) continue; // Already issued a diagnostic. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7913 | |
Chris Lattner | 211a30e | 2007-08-28 05:27:00 +0000 | [diff] [blame] | 7914 | const llvm::APSInt &InitVal = ECD->getInitVal(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7915 | |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 7916 | // Keep track of the size of positive and negative values. |
Chris Lattner | a73349d | 2008-02-26 00:33:57 +0000 | [diff] [blame] | 7917 | if (InitVal.isUnsigned() || InitVal.isNonNegative()) |
Chris Lattner | 21dd821 | 2008-01-14 21:47:29 +0000 | [diff] [blame] | 7918 | NumPositiveBits = std::max(NumPositiveBits, |
| 7919 | (unsigned)InitVal.getActiveBits()); |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 7920 | else |
Chris Lattner | 21dd821 | 2008-01-14 21:47:29 +0000 | [diff] [blame] | 7921 | NumNegativeBits = std::max(NumNegativeBits, |
| 7922 | (unsigned)InitVal.getMinSignedBits()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7923 | |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 7924 | // Keep track of whether every enum element has type int (very commmon). |
| 7925 | if (AllElementsInt) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7926 | AllElementsInt = ECD->getType() == Context.IntTy; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7927 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7928 | |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 7929 | // Figure out the type that should be used for this enum. |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 7930 | QualType BestType; |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 7931 | unsigned BestWidth; |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 7932 | |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 7933 | // C++0x N3000 [conv.prom]p3: |
| 7934 | // An rvalue of an unscoped enumeration type whose underlying |
| 7935 | // type is not fixed can be converted to an rvalue of the first |
| 7936 | // of the following types that can represent all the values of |
| 7937 | // the enumeration: int, unsigned int, long int, unsigned long |
| 7938 | // int, long long int, or unsigned long long int. |
| 7939 | // C99 6.4.4.3p2: |
| 7940 | // An identifier declared as an enumeration constant has type int. |
| 7941 | // The C99 rule is modified by a gcc extension |
| 7942 | QualType BestPromotionType; |
| 7943 | |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 7944 | bool Packed = Enum->getAttr<PackedAttr>() ? true : false; |
Argyrios Kyrtzidis | 9a2b9d7 | 2010-10-08 00:25:19 +0000 | [diff] [blame] | 7945 | // -fshort-enums is the equivalent to specifying the packed attribute on all |
| 7946 | // enum definitions. |
| 7947 | if (LangOpts.ShortEnums) |
| 7948 | Packed = true; |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 7949 | |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 7950 | if (Enum->isFixed()) { |
| 7951 | BestType = BestPromotionType = Enum->getIntegerType(); |
Duncan Sands | 240a020 | 2010-10-12 14:07:59 +0000 | [diff] [blame] | 7952 | // We don't need to set BestWidth, because BestType is going to be the type |
| 7953 | // of the enumerators, but we do anyway because otherwise some compilers |
| 7954 | // warn that it might be used uninitialized. |
| 7955 | BestWidth = CharWidth; |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 7956 | } |
| 7957 | else if (NumNegativeBits) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7958 | // 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] | 7959 | // int/long/longlong) that fits. |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 7960 | // If it's packed, check also if it fits a char or a short. |
| 7961 | if (Packed && NumNegativeBits <= CharWidth && NumPositiveBits < CharWidth) { |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 7962 | BestType = Context.SignedCharTy; |
| 7963 | BestWidth = CharWidth; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7964 | } else if (Packed && NumNegativeBits <= ShortWidth && |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 7965 | NumPositiveBits < ShortWidth) { |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 7966 | BestType = Context.ShortTy; |
| 7967 | BestWidth = ShortWidth; |
| 7968 | } else if (NumNegativeBits <= IntWidth && NumPositiveBits < IntWidth) { |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 7969 | BestType = Context.IntTy; |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 7970 | BestWidth = IntWidth; |
| 7971 | } else { |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 7972 | BestWidth = Context.Target.getLongWidth(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7973 | |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 7974 | if (NumNegativeBits <= BestWidth && NumPositiveBits < BestWidth) { |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 7975 | BestType = Context.LongTy; |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 7976 | } else { |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 7977 | BestWidth = Context.Target.getLongLongWidth(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 7978 | |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 7979 | if (NumNegativeBits > BestWidth || NumPositiveBits >= BestWidth) |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 7980 | Diag(Enum->getLocation(), diag::warn_enum_too_large); |
| 7981 | BestType = Context.LongLongTy; |
| 7982 | } |
| 7983 | } |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 7984 | BestPromotionType = (BestWidth <= IntWidth ? Context.IntTy : BestType); |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 7985 | } else { |
Douglas Gregor | aa74a1e | 2010-02-02 20:10:50 +0000 | [diff] [blame] | 7986 | // If there is no negative value, figure out the smallest type that fits |
| 7987 | // all of the enumerator values. |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 7988 | // If it's packed, check also if it fits a char or a short. |
| 7989 | if (Packed && NumPositiveBits <= CharWidth) { |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 7990 | BestType = Context.UnsignedCharTy; |
| 7991 | BestPromotionType = Context.IntTy; |
| 7992 | BestWidth = CharWidth; |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 7993 | } else if (Packed && NumPositiveBits <= ShortWidth) { |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 7994 | BestType = Context.UnsignedShortTy; |
| 7995 | BestPromotionType = Context.IntTy; |
| 7996 | BestWidth = ShortWidth; |
| 7997 | } else if (NumPositiveBits <= IntWidth) { |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 7998 | BestType = Context.UnsignedIntTy; |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 7999 | BestWidth = IntWidth; |
Douglas Gregor | aa74a1e | 2010-02-02 20:10:50 +0000 | [diff] [blame] | 8000 | BestPromotionType |
| 8001 | = (NumPositiveBits == BestWidth || !getLangOptions().CPlusPlus) |
| 8002 | ? Context.UnsignedIntTy : Context.IntTy; |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8003 | } else if (NumPositiveBits <= |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 8004 | (BestWidth = Context.Target.getLongWidth())) { |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 8005 | BestType = Context.UnsignedLongTy; |
Douglas Gregor | aa74a1e | 2010-02-02 20:10:50 +0000 | [diff] [blame] | 8006 | BestPromotionType |
| 8007 | = (NumPositiveBits == BestWidth || !getLangOptions().CPlusPlus) |
| 8008 | ? Context.UnsignedLongTy : Context.LongTy; |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 8009 | } else { |
| 8010 | BestWidth = Context.Target.getLongLongWidth(); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8011 | assert(NumPositiveBits <= BestWidth && |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 8012 | "How could an initializer get larger than ULL?"); |
| 8013 | BestType = Context.UnsignedLongLongTy; |
Douglas Gregor | aa74a1e | 2010-02-02 20:10:50 +0000 | [diff] [blame] | 8014 | BestPromotionType |
| 8015 | = (NumPositiveBits == BestWidth || !getLangOptions().CPlusPlus) |
| 8016 | ? Context.UnsignedLongLongTy : Context.LongLongTy; |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 8017 | } |
| 8018 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8019 | |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8020 | // Loop over all of the enumerator constants, changing their types to match |
| 8021 | // the type of the enum if needed. |
| 8022 | for (unsigned i = 0; i != NumElements; ++i) { |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 8023 | EnumConstantDecl *ECD = cast_or_null<EnumConstantDecl>(Elements[i]); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8024 | if (!ECD) continue; // Already issued a diagnostic. |
| 8025 | |
| 8026 | // Standard C says the enumerators have int type, but we allow, as an |
| 8027 | // extension, the enumerators to be larger than int size. If each |
| 8028 | // enumerator value fits in an int, type it as an int, otherwise type it the |
| 8029 | // same as the enumerator decl itself. This means that in "enum { X = 1U }" |
| 8030 | // that X has type 'int', not 'unsigned'. |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8031 | |
| 8032 | // Determine whether the value fits into an int. |
| 8033 | llvm::APSInt InitVal = ECD->getInitVal(); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8034 | |
| 8035 | // If it fits into an integer type, force it. Otherwise force it to match |
| 8036 | // the enum decl type. |
| 8037 | QualType NewTy; |
| 8038 | unsigned NewWidth; |
| 8039 | bool NewSign; |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 8040 | if (!getLangOptions().CPlusPlus && |
| 8041 | isRepresentableIntegerValue(Context, InitVal, Context.IntTy)) { |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8042 | NewTy = Context.IntTy; |
| 8043 | NewWidth = IntWidth; |
| 8044 | NewSign = true; |
| 8045 | } else if (ECD->getType() == BestType) { |
| 8046 | // Already the right type! |
Douglas Gregor | c9467cf | 2008-12-12 02:00:36 +0000 | [diff] [blame] | 8047 | if (getLangOptions().CPlusPlus) |
| 8048 | // C++ [dcl.enum]p4: Following the closing brace of an |
| 8049 | // enum-specifier, each enumerator has the type of its |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8050 | // enumeration. |
Douglas Gregor | c9467cf | 2008-12-12 02:00:36 +0000 | [diff] [blame] | 8051 | ECD->setType(EnumType); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8052 | continue; |
| 8053 | } else { |
| 8054 | NewTy = BestType; |
| 8055 | NewWidth = BestWidth; |
| 8056 | NewSign = BestType->isSignedIntegerType(); |
| 8057 | } |
| 8058 | |
| 8059 | // Adjust the APSInt value. |
Jay Foad | 9f71a8f | 2010-12-07 08:25:34 +0000 | [diff] [blame] | 8060 | InitVal = InitVal.extOrTrunc(NewWidth); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8061 | InitVal.setIsSigned(NewSign); |
| 8062 | ECD->setInitVal(InitVal); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8063 | |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8064 | // Adjust the Expr initializer and type. |
Abramo Bagnara | 320e153 | 2010-12-17 15:49:53 +0000 | [diff] [blame] | 8065 | if (ECD->getInitExpr() && |
| 8066 | !Context.hasSameType(NewTy, ECD->getInitExpr()->getType())) |
John McCall | f871d0c | 2010-08-07 06:22:56 +0000 | [diff] [blame] | 8067 | ECD->setInitExpr(ImplicitCastExpr::Create(Context, NewTy, |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 8068 | CK_IntegralCast, |
John McCall | f871d0c | 2010-08-07 06:22:56 +0000 | [diff] [blame] | 8069 | ECD->getInitExpr(), |
| 8070 | /*base paths*/ 0, |
John McCall | 5baba9d | 2010-08-25 10:28:54 +0000 | [diff] [blame] | 8071 | VK_RValue)); |
Douglas Gregor | c9467cf | 2008-12-12 02:00:36 +0000 | [diff] [blame] | 8072 | if (getLangOptions().CPlusPlus) |
| 8073 | // C++ [dcl.enum]p4: Following the closing brace of an |
| 8074 | // enum-specifier, each enumerator has the type of its |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8075 | // enumeration. |
Douglas Gregor | c9467cf | 2008-12-12 02:00:36 +0000 | [diff] [blame] | 8076 | ECD->setType(EnumType); |
| 8077 | else |
| 8078 | ECD->setType(NewTy); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 8079 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 8080 | |
John McCall | 1b5a618 | 2010-05-06 08:49:23 +0000 | [diff] [blame] | 8081 | Enum->completeDefinition(BestType, BestPromotionType, |
| 8082 | NumPositiveBits, NumNegativeBits); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 8083 | } |
| 8084 | |
Abramo Bagnara | 21e006e | 2011-03-03 14:20:18 +0000 | [diff] [blame] | 8085 | Decl *Sema::ActOnFileScopeAsmDecl(Expr *expr, |
| 8086 | SourceLocation StartLoc, |
| 8087 | SourceLocation EndLoc) { |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 8088 | StringLiteral *AsmString = cast<StringLiteral>(expr); |
Sebastian Redl | 798d119 | 2008-12-13 16:23:55 +0000 | [diff] [blame] | 8089 | |
Douglas Gregor | 4fe0c8e | 2009-05-30 00:08:05 +0000 | [diff] [blame] | 8090 | FileScopeAsmDecl *New = FileScopeAsmDecl::Create(Context, CurContext, |
Abramo Bagnara | 21e006e | 2011-03-03 14:20:18 +0000 | [diff] [blame] | 8091 | AsmString, StartLoc, |
| 8092 | EndLoc); |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 8093 | CurContext->addDecl(New); |
John McCall | d226f65 | 2010-08-21 09:40:31 +0000 | [diff] [blame] | 8094 | return New; |
Anders Carlsson | dfab6cb | 2008-02-08 00:33:21 +0000 | [diff] [blame] | 8095 | } |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 8096 | |
| 8097 | void Sema::ActOnPragmaWeakID(IdentifierInfo* Name, |
| 8098 | SourceLocation PragmaLoc, |
| 8099 | SourceLocation NameLoc) { |
Douglas Gregor | c83c687 | 2010-04-15 22:33:43 +0000 | [diff] [blame] | 8100 | Decl *PrevDecl = LookupSingleName(TUScope, Name, NameLoc, LookupOrdinaryName); |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 8101 | |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 8102 | if (PrevDecl) { |
Sean Hunt | cf807c4 | 2010-08-18 23:23:40 +0000 | [diff] [blame] | 8103 | PrevDecl->addAttr(::new (Context) WeakAttr(PragmaLoc, Context)); |
Ryan Flynn | e25ff83 | 2009-07-30 03:15:39 +0000 | [diff] [blame] | 8104 | } else { |
| 8105 | (void)WeakUndeclaredIdentifiers.insert( |
| 8106 | std::pair<IdentifierInfo*,WeakInfo> |
| 8107 | (Name, WeakInfo((IdentifierInfo*)0, NameLoc))); |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 8108 | } |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 8109 | } |
| 8110 | |
| 8111 | void Sema::ActOnPragmaWeakAlias(IdentifierInfo* Name, |
| 8112 | IdentifierInfo* AliasName, |
| 8113 | SourceLocation PragmaLoc, |
| 8114 | SourceLocation NameLoc, |
| 8115 | SourceLocation AliasNameLoc) { |
Douglas Gregor | c83c687 | 2010-04-15 22:33:43 +0000 | [diff] [blame] | 8116 | Decl *PrevDecl = LookupSingleName(TUScope, AliasName, AliasNameLoc, |
| 8117 | LookupOrdinaryName); |
Ryan Flynn | e25ff83 | 2009-07-30 03:15:39 +0000 | [diff] [blame] | 8118 | WeakInfo W = WeakInfo(Name, NameLoc); |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 8119 | |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 8120 | if (PrevDecl) { |
Ryan Flynn | e25ff83 | 2009-07-30 03:15:39 +0000 | [diff] [blame] | 8121 | if (!PrevDecl->hasAttr<AliasAttr>()) |
| 8122 | if (NamedDecl *ND = dyn_cast<NamedDecl>(PrevDecl)) |
Ryan Flynn | 7b1fdbd | 2009-07-31 02:52:19 +0000 | [diff] [blame] | 8123 | DeclApplyPragmaWeak(TUScope, ND, W); |
Ryan Flynn | e25ff83 | 2009-07-30 03:15:39 +0000 | [diff] [blame] | 8124 | } else { |
| 8125 | (void)WeakUndeclaredIdentifiers.insert( |
| 8126 | std::pair<IdentifierInfo*,WeakInfo>(AliasName, W)); |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 8127 | } |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 8128 | } |