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 | |
| 14 | #include "Sema.h" |
Douglas Gregor | 20093b4 | 2009-12-09 23:02:17 +0000 | [diff] [blame] | 15 | #include "SemaInit.h" |
John McCall | 7d384dd | 2009-11-18 07:57:50 +0000 | [diff] [blame] | 16 | #include "Lookup.h" |
Anders Carlsson | c44eec6 | 2008-07-03 04:20:39 +0000 | [diff] [blame] | 17 | #include "clang/AST/APValue.h" |
Chris Lattner | e1e7985 | 2008-02-06 00:51:33 +0000 | [diff] [blame] | 18 | #include "clang/AST/ASTConsumer.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 19 | #include "clang/AST/ASTContext.h" |
Douglas Gregor | a8f32e0 | 2009-10-06 17:59:45 +0000 | [diff] [blame] | 20 | #include "clang/AST/CXXInheritance.h" |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 21 | #include "clang/AST/DeclTemplate.h" |
Chris Lattner | 6b6b537 | 2008-06-26 18:38:35 +0000 | [diff] [blame] | 22 | #include "clang/AST/ExprCXX.h" |
Sebastian Redl | d3a413d | 2009-04-26 20:35:05 +0000 | [diff] [blame] | 23 | #include "clang/AST/StmtCXX.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 24 | #include "clang/Parse/DeclSpec.h" |
Douglas Gregor | a786fdb | 2009-10-13 23:27:22 +0000 | [diff] [blame] | 25 | #include "clang/Parse/ParseDiagnostic.h" |
Douglas Gregor | 314b97f | 2009-11-10 19:49:08 +0000 | [diff] [blame] | 26 | #include "clang/Parse/Template.h" |
Anders Carlsson | b790661 | 2009-08-26 23:45:07 +0000 | [diff] [blame] | 27 | #include "clang/Basic/PartialDiagnostic.h" |
Steve Naroff | 4c49a6c | 2008-01-30 23:46:05 +0000 | [diff] [blame] | 28 | #include "clang/Basic/SourceManager.h" |
Anders Carlsson | b790661 | 2009-08-26 23:45:07 +0000 | [diff] [blame] | 29 | #include "clang/Basic/TargetInfo.h" |
Steve Naroff | 4c49a6c | 2008-01-30 23:46:05 +0000 | [diff] [blame] | 30 | // FIXME: layering (ideally, Sema shouldn't be dependent on Lex API's) |
Chris Lattner | e1e7985 | 2008-02-06 00:51:33 +0000 | [diff] [blame] | 31 | #include "clang/Lex/Preprocessor.h" |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 32 | #include "clang/Lex/HeaderSearch.h" |
John McCall | 6675586 | 2009-12-24 09:58:38 +0000 | [diff] [blame] | 33 | #include "llvm/ADT/Triple.h" |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 34 | #include <algorithm> |
Douglas Gregor | 9a8c9a2 | 2009-09-28 21:14:19 +0000 | [diff] [blame] | 35 | #include <cstring> |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 36 | #include <functional> |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 37 | using namespace clang; |
| 38 | |
Chris Lattner | 21ff9c9 | 2009-03-05 01:25:28 +0000 | [diff] [blame] | 39 | /// getDeclName - Return a pretty name for the specified decl if possible, or |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 40 | /// an empty string if not. This is used for pretty crash reporting. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 41 | std::string Sema::getDeclName(DeclPtrTy d) { |
| 42 | Decl *D = d.getAs<Decl>(); |
Chris Lattner | 21ff9c9 | 2009-03-05 01:25:28 +0000 | [diff] [blame] | 43 | if (NamedDecl *DN = dyn_cast_or_null<NamedDecl>(D)) |
| 44 | return DN->getQualifiedNameAsString(); |
| 45 | return ""; |
| 46 | } |
| 47 | |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 48 | Sema::DeclGroupPtrTy Sema::ConvertDeclToDeclGroup(DeclPtrTy Ptr) { |
| 49 | return DeclGroupPtrTy::make(DeclGroupRef(Ptr.getAs<Decl>())); |
| 50 | } |
| 51 | |
Douglas Gregor | d6efafa | 2009-02-04 19:16:12 +0000 | [diff] [blame] | 52 | /// \brief If the identifier refers to a type name within this scope, |
| 53 | /// return the declaration of that type. |
| 54 | /// |
| 55 | /// This routine performs ordinary name lookup of the identifier II |
| 56 | /// within the given scope, with optional C++ scope specifier SS, to |
Douglas Gregor | 1a51b4a | 2009-02-09 15:09:02 +0000 | [diff] [blame] | 57 | /// determine whether the name refers to a type. If so, returns an |
| 58 | /// opaque pointer (actually a QualType) corresponding to that |
| 59 | /// type. Otherwise, returns NULL. |
Douglas Gregor | d6efafa | 2009-02-04 19:16:12 +0000 | [diff] [blame] | 60 | /// |
| 61 | /// If name lookup results in an ambiguity, this routine will complain |
| 62 | /// and then return NULL. |
Douglas Gregor | 1a51b4a | 2009-02-09 15:09:02 +0000 | [diff] [blame] | 63 | Sema::TypeTy *Sema::getTypeName(IdentifierInfo &II, SourceLocation NameLoc, |
Douglas Gregor | 42c39f3 | 2009-08-26 18:27:52 +0000 | [diff] [blame] | 64 | Scope *S, const CXXScopeSpec *SS, |
Douglas Gregor | f6e6fc8 | 2009-11-20 22:03:38 +0000 | [diff] [blame] | 65 | bool isClassName, |
| 66 | TypeTy *ObjectTypePtr) { |
| 67 | // Determine where we will perform name lookup. |
| 68 | DeclContext *LookupCtx = 0; |
| 69 | if (ObjectTypePtr) { |
| 70 | QualType ObjectType = QualType::getFromOpaquePtr(ObjectTypePtr); |
| 71 | if (ObjectType->isRecordType()) |
| 72 | LookupCtx = computeDeclContext(ObjectType); |
| 73 | } else if (SS && SS->isSet()) { |
| 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) |
| 88 | return 0; |
| 89 | |
| 90 | // We know from the grammar that this name refers to a type, so build a |
| 91 | // TypenameType node to describe the type. |
| 92 | // FIXME: Record somewhere that this TypenameType node has no "typename" |
| 93 | // keyword associated with it. |
| 94 | return CheckTypenameType((NestedNameSpecifier *)SS->getScopeRep(), |
| 95 | II, SS->getRange()).getAsOpaquePtr(); |
| 96 | } |
| 97 | |
Douglas Gregor | 42c39f3 | 2009-08-26 18:27:52 +0000 | [diff] [blame] | 98 | return 0; |
Douglas Gregor | f6e6fc8 | 2009-11-20 22:03:38 +0000 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | if (!LookupCtx->isDependentContext() && RequireCompleteDeclContext(*SS)) |
| 102 | return 0; |
Douglas Gregor | 42c39f3 | 2009-08-26 18:27:52 +0000 | [diff] [blame] | 103 | } |
Eli Friedman | 0f0615b | 2009-12-21 01:42:38 +0000 | [diff] [blame] | 104 | |
| 105 | // FIXME: LookupNestedNameSpecifierName isn't the right kind of |
| 106 | // lookup for class-names. |
| 107 | LookupNameKind Kind = isClassName ? LookupNestedNameSpecifierName : |
| 108 | LookupOrdinaryName; |
| 109 | LookupResult Result(*this, &II, NameLoc, Kind); |
Douglas Gregor | f6e6fc8 | 2009-11-20 22:03:38 +0000 | [diff] [blame] | 110 | if (LookupCtx) { |
| 111 | // Perform "qualified" name lookup into the declaration context we |
| 112 | // computed, which is either the type of the base of a member access |
| 113 | // expression or the declaration context associated with a prior |
| 114 | // nested-name-specifier. |
| 115 | LookupQualifiedName(Result, LookupCtx); |
Douglas Gregor | 42af25f | 2009-05-11 19:58:34 +0000 | [diff] [blame] | 116 | |
Douglas Gregor | f6e6fc8 | 2009-11-20 22:03:38 +0000 | [diff] [blame] | 117 | if (ObjectTypePtr && Result.empty()) { |
| 118 | // C++ [basic.lookup.classref]p3: |
| 119 | // If the unqualified-id is ~type-name, the type-name is looked up |
| 120 | // in the context of the entire postfix-expression. If the type T of |
| 121 | // the object expression is of a class type C, the type-name is also |
| 122 | // looked up in the scope of class C. At least one of the lookups shall |
| 123 | // find a name that refers to (possibly cv-qualified) T. |
| 124 | LookupName(Result, S); |
| 125 | } |
| 126 | } else { |
| 127 | // Perform unqualified name lookup. |
| 128 | LookupName(Result, S); |
| 129 | } |
| 130 | |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 131 | NamedDecl *IIDecl = 0; |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 132 | switch (Result.getResultKind()) { |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 133 | case LookupResult::NotFound: |
Douglas Gregor | 7d3f576 | 2010-01-15 01:44:47 +0000 | [diff] [blame] | 134 | case LookupResult::NotFoundInCurrentInstantiation: |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 135 | case LookupResult::FoundOverloaded: |
John McCall | 7ba107a | 2009-11-18 02:36:19 +0000 | [diff] [blame] | 136 | case LookupResult::FoundUnresolvedValue: |
John McCall | c373d48 | 2010-01-27 01:50:18 +0000 | [diff] [blame] | 137 | Result.suppressDiagnostics(); |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 138 | return 0; |
Douglas Gregor | b696ea3 | 2009-02-04 17:00:24 +0000 | [diff] [blame] | 139 | |
Chris Lattner | a64ef0a | 2009-10-25 22:09:09 +0000 | [diff] [blame] | 140 | case LookupResult::Ambiguous: |
John McCall | 6e24726 | 2009-10-10 05:48:19 +0000 | [diff] [blame] | 141 | // Recover from type-hiding ambiguities by hiding the type. We'll |
| 142 | // do the lookup again when looking for an object, and we can |
| 143 | // diagnose the error then. If we don't do this, then the error |
| 144 | // about hiding the type will be immediately followed by an error |
| 145 | // that only makes sense if the identifier was treated like a type. |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 146 | if (Result.getAmbiguityKind() == LookupResult::AmbiguousTagHiding) { |
| 147 | Result.suppressDiagnostics(); |
John McCall | 6e24726 | 2009-10-10 05:48:19 +0000 | [diff] [blame] | 148 | return 0; |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 149 | } |
John McCall | 6e24726 | 2009-10-10 05:48:19 +0000 | [diff] [blame] | 150 | |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 151 | // Look to see if we have a type anywhere in the list of results. |
| 152 | for (LookupResult::iterator Res = Result.begin(), ResEnd = Result.end(); |
| 153 | Res != ResEnd; ++Res) { |
| 154 | if (isa<TypeDecl>(*Res) || isa<ObjCInterfaceDecl>(*Res)) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 155 | if (!IIDecl || |
| 156 | (*Res)->getLocation().getRawEncoding() < |
Douglas Gregor | 841b53c | 2009-04-13 15:14:38 +0000 | [diff] [blame] | 157 | IIDecl->getLocation().getRawEncoding()) |
| 158 | IIDecl = *Res; |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 159 | } |
| 160 | } |
| 161 | |
| 162 | if (!IIDecl) { |
| 163 | // None of the entities we found is a type, so there is no way |
| 164 | // to even assume that the result is a type. In this case, don't |
| 165 | // complain about the ambiguity. The parser will either try to |
| 166 | // perform this lookup again (e.g., as an object name), which |
| 167 | // will produce the ambiguity, or will complain that it expected |
| 168 | // a type name. |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 169 | Result.suppressDiagnostics(); |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | // We found a type within the ambiguous lookup; diagnose the |
| 174 | // ambiguity and then return that type. This might be the right |
| 175 | // answer, or it might not be, but it suppresses any attempt to |
| 176 | // perform the name lookup again. |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 177 | break; |
Douglas Gregor | b696ea3 | 2009-02-04 17:00:24 +0000 | [diff] [blame] | 178 | |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 179 | case LookupResult::Found: |
John McCall | f36e02d | 2009-10-09 21:13:30 +0000 | [diff] [blame] | 180 | IIDecl = Result.getFoundDecl(); |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 181 | break; |
Douglas Gregor | 7176fff | 2009-01-15 00:26:24 +0000 | [diff] [blame] | 182 | } |
| 183 | |
Chris Lattner | 10ca337 | 2009-10-25 17:16:46 +0000 | [diff] [blame] | 184 | assert(IIDecl && "Didn't find decl"); |
John McCall | 54abf7d | 2009-11-04 02:18:39 +0000 | [diff] [blame] | 185 | |
Chris Lattner | 10ca337 | 2009-10-25 17:16:46 +0000 | [diff] [blame] | 186 | QualType T; |
| 187 | if (TypeDecl *TD = dyn_cast<TypeDecl>(IIDecl)) { |
John McCall | 54abf7d | 2009-11-04 02:18:39 +0000 | [diff] [blame] | 188 | DiagnoseUseOfDecl(IIDecl, NameLoc); |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 189 | |
Chris Lattner | 10ca337 | 2009-10-25 17:16:46 +0000 | [diff] [blame] | 190 | if (T.isNull()) |
| 191 | T = Context.getTypeDeclType(TD); |
| 192 | |
Douglas Gregor | e625893 | 2009-03-19 00:39:20 +0000 | [diff] [blame] | 193 | if (SS) |
| 194 | T = getQualifiedNameType(*SS, T); |
Chris Lattner | 10ca337 | 2009-10-25 17:16:46 +0000 | [diff] [blame] | 195 | |
| 196 | } else if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(IIDecl)) { |
Chris Lattner | 10ca337 | 2009-10-25 17:16:46 +0000 | [diff] [blame] | 197 | T = Context.getObjCInterfaceType(IDecl); |
John McCall | 7ba107a | 2009-11-18 02:36:19 +0000 | [diff] [blame] | 198 | } else if (UnresolvedUsingTypenameDecl *UUDecl = |
| 199 | dyn_cast<UnresolvedUsingTypenameDecl>(IIDecl)) { |
| 200 | // FIXME: preserve source structure information. |
| 201 | T = Context.getTypenameType(UUDecl->getTargetNestedNameSpecifier(), &II); |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 202 | } else { |
| 203 | // If it's not plausibly a type, suppress diagnostics. |
| 204 | Result.suppressDiagnostics(); |
Chris Lattner | 10ca337 | 2009-10-25 17:16:46 +0000 | [diff] [blame] | 205 | return 0; |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 206 | } |
Douglas Gregor | e4e5b05 | 2009-03-19 00:18:19 +0000 | [diff] [blame] | 207 | |
Chris Lattner | 10ca337 | 2009-10-25 17:16:46 +0000 | [diff] [blame] | 208 | return T.getAsOpaquePtr(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 209 | } |
| 210 | |
Chris Lattner | 4c97d76 | 2009-04-12 21:49:30 +0000 | [diff] [blame] | 211 | /// isTagName() - This method is called *for error recovery purposes only* |
| 212 | /// to determine if the specified name is a valid tag name ("struct foo"). If |
| 213 | /// so, this returns the TST for the tag corresponding to it (TST_enum, |
| 214 | /// TST_union, TST_struct, TST_class). This is used to diagnose cases in C |
| 215 | /// where the user forgot to specify the tag. |
| 216 | DeclSpec::TST Sema::isTagName(IdentifierInfo &II, Scope *S) { |
| 217 | // Do a tag name lookup in this scope. |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 218 | LookupResult R(*this, &II, SourceLocation(), LookupTagName); |
| 219 | LookupName(R, S, false); |
| 220 | R.suppressDiagnostics(); |
| 221 | if (R.getResultKind() == LookupResult::Found) |
John McCall | 1bcee0a | 2009-12-02 08:25:40 +0000 | [diff] [blame] | 222 | if (const TagDecl *TD = R.getAsSingle<TagDecl>()) { |
Chris Lattner | 4c97d76 | 2009-04-12 21:49:30 +0000 | [diff] [blame] | 223 | switch (TD->getTagKind()) { |
| 224 | case TagDecl::TK_struct: return DeclSpec::TST_struct; |
| 225 | case TagDecl::TK_union: return DeclSpec::TST_union; |
| 226 | case TagDecl::TK_class: return DeclSpec::TST_class; |
| 227 | case TagDecl::TK_enum: return DeclSpec::TST_enum; |
| 228 | } |
| 229 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 230 | |
Chris Lattner | 4c97d76 | 2009-04-12 21:49:30 +0000 | [diff] [blame] | 231 | return DeclSpec::TST_unspecified; |
| 232 | } |
| 233 | |
Douglas Gregor | a786fdb | 2009-10-13 23:27:22 +0000 | [diff] [blame] | 234 | bool Sema::DiagnoseUnknownTypeName(const IdentifierInfo &II, |
| 235 | SourceLocation IILoc, |
| 236 | Scope *S, |
| 237 | const CXXScopeSpec *SS, |
| 238 | TypeTy *&SuggestedType) { |
| 239 | // We don't have anything to suggest (yet). |
| 240 | SuggestedType = 0; |
| 241 | |
Douglas Gregor | 546be3c | 2009-12-30 17:04:44 +0000 | [diff] [blame] | 242 | // There may have been a typo in the name of the type. Look up typo |
| 243 | // results, in case we have something that we can suggest. |
| 244 | LookupResult Lookup(*this, &II, IILoc, LookupOrdinaryName, |
| 245 | NotForRedeclaration); |
| 246 | |
| 247 | // FIXME: It would be nice if we could correct for typos in built-in |
| 248 | // names, such as "itn" for "int". |
| 249 | |
| 250 | if (CorrectTypo(Lookup, S, SS) && Lookup.isSingleResult()) { |
| 251 | NamedDecl *Result = Lookup.getAsSingle<NamedDecl>(); |
| 252 | if ((isa<TypeDecl>(Result) || isa<ObjCInterfaceDecl>(Result)) && |
| 253 | !Result->isInvalidDecl()) { |
| 254 | // We found a similarly-named type or interface; suggest that. |
| 255 | if (!SS || !SS->isSet()) |
| 256 | Diag(IILoc, diag::err_unknown_typename_suggest) |
| 257 | << &II << Lookup.getLookupName() |
| 258 | << CodeModificationHint::CreateReplacement(SourceRange(IILoc), |
| 259 | Result->getNameAsString()); |
| 260 | else if (DeclContext *DC = computeDeclContext(*SS, false)) |
| 261 | Diag(IILoc, diag::err_unknown_nested_typename_suggest) |
| 262 | << &II << DC << Lookup.getLookupName() << SS->getRange() |
| 263 | << CodeModificationHint::CreateReplacement(SourceRange(IILoc), |
| 264 | Result->getNameAsString()); |
| 265 | else |
| 266 | llvm_unreachable("could not have corrected a typo here"); |
| 267 | |
Douglas Gregor | 67dd1d4 | 2010-01-07 00:17:44 +0000 | [diff] [blame] | 268 | Diag(Result->getLocation(), diag::note_previous_decl) |
| 269 | << Result->getDeclName(); |
| 270 | |
Douglas Gregor | 546be3c | 2009-12-30 17:04:44 +0000 | [diff] [blame] | 271 | SuggestedType = getTypeName(*Result->getIdentifier(), IILoc, S, SS); |
| 272 | return true; |
| 273 | } |
| 274 | } |
| 275 | |
Douglas Gregor | a786fdb | 2009-10-13 23:27:22 +0000 | [diff] [blame] | 276 | // FIXME: Should we move the logic that tries to recover from a missing tag |
| 277 | // (struct, union, enum) from Parser::ParseImplicitInt here, instead? |
| 278 | |
Douglas Gregor | 546be3c | 2009-12-30 17:04:44 +0000 | [diff] [blame] | 279 | if (!SS || (!SS->isSet() && !SS->isInvalid())) |
Douglas Gregor | a786fdb | 2009-10-13 23:27:22 +0000 | [diff] [blame] | 280 | Diag(IILoc, diag::err_unknown_typename) << &II; |
| 281 | else if (DeclContext *DC = computeDeclContext(*SS, false)) |
| 282 | Diag(IILoc, diag::err_typename_nested_not_found) |
| 283 | << &II << DC << SS->getRange(); |
| 284 | else if (isDependentScopeSpecifier(*SS)) { |
| 285 | Diag(SS->getRange().getBegin(), diag::err_typename_missing) |
Daniel Dunbar | 01eb9b9 | 2009-10-18 21:17:35 +0000 | [diff] [blame] | 286 | << (NestedNameSpecifier *)SS->getScopeRep() << II.getName() |
Douglas Gregor | a786fdb | 2009-10-13 23:27:22 +0000 | [diff] [blame] | 287 | << SourceRange(SS->getRange().getBegin(), IILoc) |
| 288 | << CodeModificationHint::CreateInsertion(SS->getRange().getBegin(), |
| 289 | "typename "); |
| 290 | SuggestedType = ActOnTypenameType(SourceLocation(), *SS, II, IILoc).get(); |
| 291 | } else { |
| 292 | assert(SS && SS->isInvalid() && |
| 293 | "Invalid scope specifier has already been diagnosed"); |
| 294 | } |
| 295 | |
| 296 | return true; |
| 297 | } |
Chris Lattner | 4c97d76 | 2009-04-12 21:49:30 +0000 | [diff] [blame] | 298 | |
John McCall | 88232aa | 2009-08-18 00:00:49 +0000 | [diff] [blame] | 299 | // Determines the context to return to after temporarily entering a |
| 300 | // context. This depends in an unnecessarily complicated way on the |
| 301 | // exact ordering of callbacks from the parser. |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 302 | DeclContext *Sema::getContainingDC(DeclContext *DC) { |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 303 | |
John McCall | 88232aa | 2009-08-18 00:00:49 +0000 | [diff] [blame] | 304 | // Functions defined inline within classes aren't parsed until we've |
| 305 | // finished parsing the top-level class, so the top-level class is |
| 306 | // the context we'll need to return to. |
| 307 | if (isa<FunctionDecl>(DC)) { |
| 308 | DC = DC->getLexicalParent(); |
| 309 | |
| 310 | // A function not defined within a class will always return to its |
| 311 | // lexical context. |
| 312 | if (!isa<CXXRecordDecl>(DC)) |
| 313 | return DC; |
| 314 | |
| 315 | // A C++ inline method/friend is parsed *after* the topmost class |
| 316 | // it was declared in is fully parsed ("complete"); the topmost |
| 317 | // class is the context we need to return to. |
Argyrios Kyrtzidis | 77407b8 | 2008-11-19 18:01:13 +0000 | [diff] [blame] | 318 | while (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(DC->getLexicalParent())) |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 319 | DC = RD; |
| 320 | |
| 321 | // Return the declaration context of the topmost class the inline method is |
| 322 | // declared in. |
| 323 | return DC; |
| 324 | } |
| 325 | |
Argyrios Kyrtzidis | 5239304 | 2008-11-09 23:41:00 +0000 | [diff] [blame] | 326 | if (isa<ObjCMethodDecl>(DC)) |
| 327 | return Context.getTranslationUnitDecl(); |
| 328 | |
Argyrios Kyrtzidis | 77407b8 | 2008-11-19 18:01:13 +0000 | [diff] [blame] | 329 | return DC->getLexicalParent(); |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 330 | } |
| 331 | |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 332 | void Sema::PushDeclContext(Scope *S, DeclContext *DC) { |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 333 | assert(getContainingDC(DC) == CurContext && |
Zhongxing Xu | e50897a | 2008-12-08 07:14:51 +0000 | [diff] [blame] | 334 | "The next DeclContext should be lexically contained in the current one."); |
Chris Lattner | 9fdf9c6 | 2008-04-22 18:39:57 +0000 | [diff] [blame] | 335 | CurContext = DC; |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 336 | S->setEntity(DC); |
Chris Lattner | 0ed844b | 2008-04-04 06:12:32 +0000 | [diff] [blame] | 337 | } |
| 338 | |
Chris Lattner | b048c98 | 2008-04-06 04:47:34 +0000 | [diff] [blame] | 339 | void Sema::PopDeclContext() { |
| 340 | assert(CurContext && "DeclContext imbalance!"); |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 341 | |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 342 | CurContext = getContainingDC(CurContext); |
Chris Lattner | 0ed844b | 2008-04-04 06:12:32 +0000 | [diff] [blame] | 343 | } |
| 344 | |
Argyrios Kyrtzidis | 179fe1a | 2009-06-17 23:19:02 +0000 | [diff] [blame] | 345 | /// EnterDeclaratorContext - Used when we must lookup names in the context |
| 346 | /// of a declarator's nested name specifier. |
John McCall | 7a1dc56 | 2009-12-19 10:49:29 +0000 | [diff] [blame] | 347 | /// |
Argyrios Kyrtzidis | 1d17553 | 2009-06-17 23:15:40 +0000 | [diff] [blame] | 348 | void Sema::EnterDeclaratorContext(Scope *S, DeclContext *DC) { |
John McCall | 7a1dc56 | 2009-12-19 10:49:29 +0000 | [diff] [blame] | 349 | // C++0x [basic.lookup.unqual]p13: |
| 350 | // A name used in the definition of a static data member of class |
| 351 | // X (after the qualified-id of the static member) is looked up as |
| 352 | // if the name was used in a member function of X. |
| 353 | // C++0x [basic.lookup.unqual]p14: |
| 354 | // If a variable member of a namespace is defined outside of the |
| 355 | // scope of its namespace then any name used in the definition of |
| 356 | // the variable member (after the declarator-id) is looked up as |
| 357 | // if the definition of the variable member occurred in its |
| 358 | // namespace. |
| 359 | // Both of these imply that we should push a scope whose context |
| 360 | // is the semantic context of the declaration. We can't use |
| 361 | // PushDeclContext here because that context is not necessarily |
| 362 | // lexically contained in the current context. Fortunately, |
| 363 | // the containing scope should have the appropriate information. |
| 364 | |
| 365 | assert(!S->getEntity() && "scope already has entity"); |
| 366 | |
| 367 | #ifndef NDEBUG |
| 368 | Scope *Ancestor = S->getParent(); |
| 369 | while (!Ancestor->getEntity()) Ancestor = Ancestor->getParent(); |
| 370 | assert(Ancestor->getEntity() == CurContext && "ancestor context mismatch"); |
| 371 | #endif |
| 372 | |
Argyrios Kyrtzidis | 1d17553 | 2009-06-17 23:15:40 +0000 | [diff] [blame] | 373 | CurContext = DC; |
John McCall | 7a1dc56 | 2009-12-19 10:49:29 +0000 | [diff] [blame] | 374 | S->setEntity(DC); |
Argyrios Kyrtzidis | 1d17553 | 2009-06-17 23:15:40 +0000 | [diff] [blame] | 375 | } |
| 376 | |
Argyrios Kyrtzidis | 1d17553 | 2009-06-17 23:15:40 +0000 | [diff] [blame] | 377 | void Sema::ExitDeclaratorContext(Scope *S) { |
John McCall | 7a1dc56 | 2009-12-19 10:49:29 +0000 | [diff] [blame] | 378 | assert(S->getEntity() == CurContext && "Context imbalance!"); |
Argyrios Kyrtzidis | 1d17553 | 2009-06-17 23:15:40 +0000 | [diff] [blame] | 379 | |
John McCall | 7a1dc56 | 2009-12-19 10:49:29 +0000 | [diff] [blame] | 380 | // Switch back to the lexical context. The safety of this is |
| 381 | // enforced by an assert in EnterDeclaratorContext. |
| 382 | Scope *Ancestor = S->getParent(); |
| 383 | while (!Ancestor->getEntity()) Ancestor = Ancestor->getParent(); |
| 384 | CurContext = (DeclContext*) Ancestor->getEntity(); |
| 385 | |
| 386 | // We don't need to do anything with the scope, which is going to |
| 387 | // disappear. |
Argyrios Kyrtzidis | 1d17553 | 2009-06-17 23:15:40 +0000 | [diff] [blame] | 388 | } |
| 389 | |
Douglas Gregor | f9201e0 | 2009-02-11 23:02:49 +0000 | [diff] [blame] | 390 | /// \brief Determine whether we allow overloading of the function |
| 391 | /// PrevDecl with another declaration. |
| 392 | /// |
| 393 | /// This routine determines whether overloading is possible, not |
| 394 | /// whether some new function is actually an overload. It will return |
| 395 | /// true in C++ (where we can always provide overloads) or, as an |
| 396 | /// extension, in C when the previous function is already an |
| 397 | /// overloaded function declaration or has the "overloadable" |
| 398 | /// attribute. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 399 | static bool AllowOverloadingOfFunction(LookupResult &Previous, |
| 400 | ASTContext &Context) { |
Douglas Gregor | f9201e0 | 2009-02-11 23:02:49 +0000 | [diff] [blame] | 401 | if (Context.getLangOptions().CPlusPlus) |
| 402 | return true; |
| 403 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 404 | if (Previous.getResultKind() == LookupResult::FoundOverloaded) |
Douglas Gregor | f9201e0 | 2009-02-11 23:02:49 +0000 | [diff] [blame] | 405 | return true; |
| 406 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 407 | return (Previous.getResultKind() == LookupResult::Found |
| 408 | && Previous.getFoundDecl()->hasAttr<OverloadableAttr>()); |
Douglas Gregor | f9201e0 | 2009-02-11 23:02:49 +0000 | [diff] [blame] | 409 | } |
| 410 | |
Argyrios Kyrtzidis | 87f3ff0 | 2008-04-12 00:47:19 +0000 | [diff] [blame] | 411 | /// Add this decl to the scope shadowed decl chains. |
John McCall | ab88d97 | 2009-08-31 22:39:49 +0000 | [diff] [blame] | 412 | void Sema::PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext) { |
Douglas Gregor | 074149e | 2009-01-05 19:45:36 +0000 | [diff] [blame] | 413 | // Move up the scope chain until we find the nearest enclosing |
| 414 | // non-transparent context. The declaration will be introduced into this |
| 415 | // scope. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 416 | while (S->getEntity() && |
Douglas Gregor | 074149e | 2009-01-05 19:45:36 +0000 | [diff] [blame] | 417 | ((DeclContext *)S->getEntity())->isTransparentContext()) |
| 418 | S = S->getParent(); |
| 419 | |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 420 | // Add scoped declarations into their context, so that they can be |
| 421 | // found later. Declarations without a context won't be inserted |
| 422 | // into any context. |
John McCall | ab88d97 | 2009-08-31 22:39:49 +0000 | [diff] [blame] | 423 | if (AddToContext) |
| 424 | CurContext->addDecl(D); |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 425 | |
Chandler Carruth | 8761d68 | 2010-02-21 07:08:09 +0000 | [diff] [blame] | 426 | // Out-of-line definitions shouldn't be pushed into scope in C++. |
| 427 | // Out-of-line variable and function definitions shouldn't even in C. |
| 428 | if ((getLangOptions().CPlusPlus || isa<VarDecl>(D) || isa<FunctionDecl>(D)) && |
| 429 | D->isOutOfLine()) |
| 430 | return; |
| 431 | |
| 432 | // Template instantiations should also not be pushed into scope. |
| 433 | if (isa<FunctionDecl>(D) && |
| 434 | cast<FunctionDecl>(D)->isFunctionTemplateSpecialization()) |
Douglas Gregor | d04b1be | 2009-09-28 18:41:37 +0000 | [diff] [blame] | 435 | return; |
| 436 | |
John McCall | f36e02d | 2009-10-09 21:13:30 +0000 | [diff] [blame] | 437 | // If this replaces anything in the current scope, |
| 438 | IdentifierResolver::iterator I = IdResolver.begin(D->getDeclName()), |
| 439 | IEnd = IdResolver.end(); |
| 440 | for (; I != IEnd; ++I) { |
| 441 | if (S->isDeclScope(DeclPtrTy::make(*I)) && D->declarationReplaces(*I)) { |
| 442 | S->RemoveDecl(DeclPtrTy::make(*I)); |
| 443 | IdResolver.RemoveDecl(*I); |
Argyrios Kyrtzidis | 00bc645 | 2008-05-09 23:39:43 +0000 | [diff] [blame] | 444 | |
John McCall | f36e02d | 2009-10-09 21:13:30 +0000 | [diff] [blame] | 445 | // Should only need to replace one decl. |
| 446 | break; |
Douglas Gregor | 516ff43 | 2009-04-24 02:57:34 +0000 | [diff] [blame] | 447 | } |
Argyrios Kyrtzidis | 00bc645 | 2008-05-09 23:39:43 +0000 | [diff] [blame] | 448 | } |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 449 | |
John McCall | f36e02d | 2009-10-09 21:13:30 +0000 | [diff] [blame] | 450 | S->AddDecl(DeclPtrTy::make(D)); |
Argyrios Kyrtzidis | 00bc645 | 2008-05-09 23:39:43 +0000 | [diff] [blame] | 451 | IdResolver.AddDecl(D); |
Argyrios Kyrtzidis | 87f3ff0 | 2008-04-12 00:47:19 +0000 | [diff] [blame] | 452 | } |
| 453 | |
Douglas Gregor | 2531c2d | 2009-09-28 00:47:05 +0000 | [diff] [blame] | 454 | bool Sema::isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S) { |
Douglas Gregor | 2531c2d | 2009-09-28 00:47:05 +0000 | [diff] [blame] | 455 | return IdResolver.isDeclInScope(D, Ctx, Context, S); |
| 456 | } |
| 457 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 458 | static bool isOutOfScopePreviousDeclaration(NamedDecl *, |
| 459 | DeclContext*, |
| 460 | ASTContext&); |
| 461 | |
| 462 | /// Filters out lookup results that don't fall within the given scope |
| 463 | /// as determined by isDeclInScope. |
| 464 | static void FilterLookupForScope(Sema &SemaRef, LookupResult &R, |
| 465 | DeclContext *Ctx, Scope *S, |
| 466 | bool ConsiderLinkage) { |
| 467 | LookupResult::Filter F = R.makeFilter(); |
| 468 | while (F.hasNext()) { |
| 469 | NamedDecl *D = F.next(); |
| 470 | |
| 471 | if (SemaRef.isDeclInScope(D, Ctx, S)) |
| 472 | continue; |
| 473 | |
| 474 | if (ConsiderLinkage && |
| 475 | isOutOfScopePreviousDeclaration(D, Ctx, SemaRef.Context)) |
| 476 | continue; |
| 477 | |
| 478 | F.erase(); |
| 479 | } |
| 480 | |
| 481 | F.done(); |
| 482 | } |
| 483 | |
| 484 | static bool isUsingDecl(NamedDecl *D) { |
| 485 | return isa<UsingShadowDecl>(D) || |
| 486 | isa<UnresolvedUsingTypenameDecl>(D) || |
| 487 | isa<UnresolvedUsingValueDecl>(D); |
| 488 | } |
| 489 | |
| 490 | /// Removes using shadow declarations from the lookup results. |
| 491 | static void RemoveUsingDecls(LookupResult &R) { |
| 492 | LookupResult::Filter F = R.makeFilter(); |
| 493 | while (F.hasNext()) |
| 494 | if (isUsingDecl(F.next())) |
| 495 | F.erase(); |
| 496 | |
| 497 | F.done(); |
| 498 | } |
| 499 | |
Anders Carlsson | 99a000e | 2009-11-07 07:18:14 +0000 | [diff] [blame] | 500 | static bool ShouldDiagnoseUnusedDecl(const NamedDecl *D) { |
John McCall | 86ff308 | 2010-02-04 22:26:26 +0000 | [diff] [blame] | 501 | if (D->isInvalidDecl()) |
| 502 | return false; |
| 503 | |
Anders Carlsson | f7613d5 | 2009-11-07 07:26:56 +0000 | [diff] [blame] | 504 | if (D->isUsed() || D->hasAttr<UnusedAttr>()) |
| 505 | return false; |
John McCall | 86ff308 | 2010-02-04 22:26:26 +0000 | [diff] [blame] | 506 | |
| 507 | // White-list anything that isn't a local variable. |
| 508 | if (!isa<VarDecl>(D) || isa<ParmVarDecl>(D) || isa<ImplicitParamDecl>(D) || |
| 509 | !D->getDeclContext()->isFunctionOrMethod()) |
| 510 | return false; |
| 511 | |
| 512 | // Types of valid local variables should be complete, so this should succeed. |
Anders Carlsson | f7613d5 | 2009-11-07 07:26:56 +0000 | [diff] [blame] | 513 | if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { |
| 514 | if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { |
| 515 | if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { |
| 516 | if (!RD->hasTrivialConstructor()) |
| 517 | return false; |
| 518 | if (!RD->hasTrivialDestructor()) |
| 519 | return false; |
| 520 | } |
| 521 | } |
| 522 | } |
| 523 | |
John McCall | 86ff308 | 2010-02-04 22:26:26 +0000 | [diff] [blame] | 524 | return true; |
Anders Carlsson | 99a000e | 2009-11-07 07:18:14 +0000 | [diff] [blame] | 525 | } |
| 526 | |
Steve Naroff | b216c88 | 2007-10-09 22:01:59 +0000 | [diff] [blame] | 527 | void Sema::ActOnPopScope(SourceLocation Loc, Scope *S) { |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 528 | if (S->decl_empty()) return; |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 529 | assert((S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope)) && |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 530 | "Scope shouldn't contain decls!"); |
Argyrios Kyrtzidis | 00bc645 | 2008-05-09 23:39:43 +0000 | [diff] [blame] | 531 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 532 | for (Scope::decl_iterator I = S->decl_begin(), E = S->decl_end(); |
| 533 | I != E; ++I) { |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 534 | Decl *TmpD = (*I).getAs<Decl>(); |
Steve Naroff | c752d04 | 2007-09-13 18:10:37 +0000 | [diff] [blame] | 535 | assert(TmpD && "This decl didn't get pushed??"); |
Argyrios Kyrtzidis | 7643536 | 2008-06-10 01:32:09 +0000 | [diff] [blame] | 536 | |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 537 | assert(isa<NamedDecl>(TmpD) && "Decl isn't NamedDecl?"); |
| 538 | NamedDecl *D = cast<NamedDecl>(TmpD); |
Argyrios Kyrtzidis | 7643536 | 2008-06-10 01:32:09 +0000 | [diff] [blame] | 539 | |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 540 | if (!D->getDeclName()) continue; |
Chris Lattner | 7f925cc | 2008-04-11 07:00:53 +0000 | [diff] [blame] | 541 | |
Douglas Gregor | b5352cf | 2009-10-08 21:35:42 +0000 | [diff] [blame] | 542 | // Diagnose unused variables in this scope. |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 543 | if (ShouldDiagnoseUnusedDecl(D) && |
| 544 | S->getNumErrorsAtStart() == getDiagnostics().getNumErrors()) |
Anders Carlsson | 99a000e | 2009-11-07 07:18:14 +0000 | [diff] [blame] | 545 | Diag(D->getLocation(), diag::warn_unused_variable) << D->getDeclName(); |
Douglas Gregor | b5352cf | 2009-10-08 21:35:42 +0000 | [diff] [blame] | 546 | |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 547 | // Remove this name from our lexical scope. |
| 548 | IdResolver.RemoveDecl(D); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 549 | } |
| 550 | } |
| 551 | |
Steve Naroff | e8043c3 | 2008-04-01 23:04:06 +0000 | [diff] [blame] | 552 | /// getObjCInterfaceDecl - Look up a for a class declaration in the scope. |
| 553 | /// return 0 if one not found. |
Douglas Gregor | f06cdae | 2010-01-03 18:01:57 +0000 | [diff] [blame] | 554 | /// |
| 555 | /// \param Id the name of the Objective-C class we're looking for. If |
| 556 | /// typo-correction fixes this name, the Id will be updated |
| 557 | /// to the fixed name. |
| 558 | /// |
| 559 | /// \param RecoverLoc if provided, this routine will attempt to |
| 560 | /// recover from a typo in the name of an existing Objective-C class |
| 561 | /// and, if successful, will return the lookup that results from |
| 562 | /// typo-correction. |
| 563 | ObjCInterfaceDecl *Sema::getObjCInterfaceDecl(IdentifierInfo *&Id, |
| 564 | SourceLocation RecoverLoc) { |
Steve Naroff | 3110251 | 2008-04-02 18:30:49 +0000 | [diff] [blame] | 565 | // The third "scope" argument is 0 since we aren't enabling lazy built-in |
| 566 | // creation from this context. |
John McCall | f36e02d | 2009-10-09 21:13:30 +0000 | [diff] [blame] | 567 | NamedDecl *IDecl = LookupSingleName(TUScope, Id, LookupOrdinaryName); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 568 | |
Douglas Gregor | f06cdae | 2010-01-03 18:01:57 +0000 | [diff] [blame] | 569 | if (!IDecl && !RecoverLoc.isInvalid()) { |
| 570 | // Perform typo correction at the given location, but only if we |
| 571 | // find an Objective-C class name. |
| 572 | LookupResult R(*this, Id, RecoverLoc, LookupOrdinaryName); |
| 573 | if (CorrectTypo(R, TUScope, 0) && |
| 574 | (IDecl = R.getAsSingle<ObjCInterfaceDecl>())) { |
| 575 | Diag(RecoverLoc, diag::err_undef_interface_suggest) |
| 576 | << Id << IDecl->getDeclName() |
| 577 | << CodeModificationHint::CreateReplacement(RecoverLoc, |
| 578 | IDecl->getNameAsString()); |
Douglas Gregor | 67dd1d4 | 2010-01-07 00:17:44 +0000 | [diff] [blame] | 579 | Diag(IDecl->getLocation(), diag::note_previous_decl) |
| 580 | << IDecl->getDeclName(); |
| 581 | |
Douglas Gregor | f06cdae | 2010-01-03 18:01:57 +0000 | [diff] [blame] | 582 | Id = IDecl->getIdentifier(); |
| 583 | } |
| 584 | } |
| 585 | |
Steve Naroff | b327ce0 | 2008-04-02 14:35:35 +0000 | [diff] [blame] | 586 | return dyn_cast_or_null<ObjCInterfaceDecl>(IDecl); |
Fariborz Jahanian | 4cabdfc | 2007-10-12 19:38:20 +0000 | [diff] [blame] | 587 | } |
| 588 | |
Douglas Gregor | 1a0d31a | 2009-01-12 18:45:55 +0000 | [diff] [blame] | 589 | /// getNonFieldDeclScope - Retrieves the innermost scope, starting |
| 590 | /// from S, where a non-field would be declared. This routine copes |
| 591 | /// with the difference between C and C++ scoping rules in structs and |
| 592 | /// unions. For example, the following code is well-formed in C but |
| 593 | /// ill-formed in C++: |
| 594 | /// @code |
| 595 | /// struct S6 { |
| 596 | /// enum { BAR } e; |
| 597 | /// }; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 598 | /// |
Douglas Gregor | 1a0d31a | 2009-01-12 18:45:55 +0000 | [diff] [blame] | 599 | /// void test_S6() { |
| 600 | /// struct S6 a; |
| 601 | /// a.e = BAR; |
| 602 | /// } |
| 603 | /// @endcode |
| 604 | /// For the declaration of BAR, this routine will return a different |
| 605 | /// scope. The scope S will be the scope of the unnamed enumeration |
| 606 | /// within S6. In C++, this routine will return the scope associated |
| 607 | /// with S6, because the enumeration's scope is a transparent |
| 608 | /// context but structures can contain non-field names. In C, this |
| 609 | /// routine will return the translation unit scope, since the |
| 610 | /// enumeration's scope is a transparent context and structures cannot |
| 611 | /// contain non-field names. |
| 612 | Scope *Sema::getNonFieldDeclScope(Scope *S) { |
| 613 | while (((S->getFlags() & Scope::DeclScope) == 0) || |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 614 | (S->getEntity() && |
Douglas Gregor | 1a0d31a | 2009-01-12 18:45:55 +0000 | [diff] [blame] | 615 | ((DeclContext *)S->getEntity())->isTransparentContext()) || |
| 616 | (S->isClassScope() && !getLangOptions().CPlusPlus)) |
| 617 | S = S->getParent(); |
| 618 | return S; |
| 619 | } |
| 620 | |
Chris Lattner | 95e2c71 | 2008-05-05 22:18:14 +0000 | [diff] [blame] | 621 | void Sema::InitBuiltinVaListType() { |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 622 | if (!Context.getBuiltinVaListType().isNull()) |
| 623 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 624 | |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 625 | IdentifierInfo *VaIdent = &Context.Idents.get("__builtin_va_list"); |
John McCall | f36e02d | 2009-10-09 21:13:30 +0000 | [diff] [blame] | 626 | NamedDecl *VaDecl = LookupSingleName(TUScope, VaIdent, LookupOrdinaryName); |
Steve Naroff | 733002f | 2007-10-18 22:17:45 +0000 | [diff] [blame] | 627 | TypedefDecl *VaTypedef = cast<TypedefDecl>(VaDecl); |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 628 | Context.setBuiltinVaListType(Context.getTypedefType(VaTypedef)); |
| 629 | } |
| 630 | |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 631 | /// LazilyCreateBuiltin - The specified Builtin-ID was first used at |
| 632 | /// file scope. lazily create a decl for it. ForRedeclaration is true |
| 633 | /// if we're creating this built-in in anticipation of redeclaring the |
| 634 | /// built-in. |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 635 | NamedDecl *Sema::LazilyCreateBuiltin(IdentifierInfo *II, unsigned bid, |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 636 | Scope *S, bool ForRedeclaration, |
| 637 | SourceLocation Loc) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 638 | Builtin::ID BID = (Builtin::ID)bid; |
| 639 | |
Chris Lattner | bd7eb1c | 2008-09-28 05:54:29 +0000 | [diff] [blame] | 640 | if (Context.BuiltinInfo.hasVAListUse(BID)) |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 641 | InitBuiltinVaListType(); |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 642 | |
Chris Lattner | 86df27b | 2009-06-14 00:45:47 +0000 | [diff] [blame] | 643 | ASTContext::GetBuiltinTypeError Error; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 644 | QualType R = Context.GetBuiltinType(BID, Error); |
Douglas Gregor | 370ab3f | 2009-02-14 01:52:53 +0000 | [diff] [blame] | 645 | switch (Error) { |
Chris Lattner | 86df27b | 2009-06-14 00:45:47 +0000 | [diff] [blame] | 646 | case ASTContext::GE_None: |
Douglas Gregor | 370ab3f | 2009-02-14 01:52:53 +0000 | [diff] [blame] | 647 | // Okay |
| 648 | break; |
| 649 | |
Mike Stump | f711c41 | 2009-07-28 23:57:15 +0000 | [diff] [blame] | 650 | case ASTContext::GE_Missing_stdio: |
Douglas Gregor | 370ab3f | 2009-02-14 01:52:53 +0000 | [diff] [blame] | 651 | if (ForRedeclaration) |
| 652 | Diag(Loc, diag::err_implicit_decl_requires_stdio) |
| 653 | << Context.BuiltinInfo.GetName(BID); |
| 654 | return 0; |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 655 | |
Mike Stump | f711c41 | 2009-07-28 23:57:15 +0000 | [diff] [blame] | 656 | case ASTContext::GE_Missing_setjmp: |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 657 | if (ForRedeclaration) |
| 658 | Diag(Loc, diag::err_implicit_decl_requires_setjmp) |
| 659 | << Context.BuiltinInfo.GetName(BID); |
| 660 | return 0; |
Douglas Gregor | 370ab3f | 2009-02-14 01:52:53 +0000 | [diff] [blame] | 661 | } |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 662 | |
| 663 | if (!ForRedeclaration && Context.BuiltinInfo.isPredefinedLibFunction(BID)) { |
| 664 | Diag(Loc, diag::ext_implicit_lib_function_decl) |
| 665 | << Context.BuiltinInfo.GetName(BID) |
| 666 | << R; |
Douglas Gregor | b1152d8 | 2009-02-16 21:58:21 +0000 | [diff] [blame] | 667 | if (Context.BuiltinInfo.getHeaderName(BID) && |
Chris Lattner | 6a7334d | 2009-04-16 03:59:32 +0000 | [diff] [blame] | 668 | Diags.getDiagnosticLevel(diag::ext_implicit_lib_function_decl) |
| 669 | != Diagnostic::Ignored) |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 670 | Diag(Loc, diag::note_please_include_header) |
| 671 | << Context.BuiltinInfo.getHeaderName(BID) |
| 672 | << Context.BuiltinInfo.GetName(BID); |
| 673 | } |
| 674 | |
Argyrios Kyrtzidis | ff898cd | 2008-04-17 14:47:13 +0000 | [diff] [blame] | 675 | FunctionDecl *New = FunctionDecl::Create(Context, |
| 676 | Context.getTranslationUnitDecl(), |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 677 | Loc, II, R, /*TInfo=*/0, |
Douglas Gregor | 2224f84 | 2009-02-25 16:33:18 +0000 | [diff] [blame] | 678 | FunctionDecl::Extern, false, |
| 679 | /*hasPrototype=*/true); |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 680 | New->setImplicit(); |
| 681 | |
Chris Lattner | 95e2c71 | 2008-05-05 22:18:14 +0000 | [diff] [blame] | 682 | // Create Decl objects for each parameter, adding them to the |
| 683 | // FunctionDecl. |
Douglas Gregor | 72564e7 | 2009-02-26 23:50:07 +0000 | [diff] [blame] | 684 | if (FunctionProtoType *FT = dyn_cast<FunctionProtoType>(R)) { |
Chris Lattner | 95e2c71 | 2008-05-05 22:18:14 +0000 | [diff] [blame] | 685 | llvm::SmallVector<ParmVarDecl*, 16> Params; |
| 686 | for (unsigned i = 0, e = FT->getNumArgs(); i != e; ++i) |
| 687 | Params.push_back(ParmVarDecl::Create(Context, New, SourceLocation(), 0, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 688 | FT->getArgType(i), /*TInfo=*/0, |
Argyrios Kyrtzidis | a1d5662 | 2009-08-19 01:27:57 +0000 | [diff] [blame] | 689 | VarDecl::None, 0)); |
Douglas Gregor | 838db38 | 2010-02-11 01:19:42 +0000 | [diff] [blame] | 690 | New->setParams(Params.data(), Params.size()); |
Chris Lattner | 95e2c71 | 2008-05-05 22:18:14 +0000 | [diff] [blame] | 691 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 692 | |
| 693 | AddKnownFunctionAttributes(New); |
| 694 | |
Chris Lattner | 7f925cc | 2008-04-11 07:00:53 +0000 | [diff] [blame] | 695 | // TUScope is the translation-unit scope to insert this function into. |
Douglas Gregor | a8cc8ce | 2009-01-09 18:51:29 +0000 | [diff] [blame] | 696 | // FIXME: This is hideous. We need to teach PushOnScopeChains to |
| 697 | // relate Scopes to DeclContexts, and probably eliminate CurContext |
| 698 | // entirely, but we're not there yet. |
| 699 | DeclContext *SavedContext = CurContext; |
| 700 | CurContext = Context.getTranslationUnitDecl(); |
Argyrios Kyrtzidis | 00bc645 | 2008-05-09 23:39:43 +0000 | [diff] [blame] | 701 | PushOnScopeChains(New, TUScope); |
Douglas Gregor | a8cc8ce | 2009-01-09 18:51:29 +0000 | [diff] [blame] | 702 | CurContext = SavedContext; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 703 | return New; |
| 704 | } |
| 705 | |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 706 | /// MergeTypeDefDecl - We just parsed a typedef 'New' which has the |
| 707 | /// same name and scope as a previous declaration 'Old'. Figure out |
| 708 | /// how to resolve this situation, merging decls or emitting |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 709 | /// 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] | 710 | /// |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 711 | void Sema::MergeTypeDefDecl(TypedefDecl *New, LookupResult &OldDecls) { |
| 712 | // If the new decl is known invalid already, don't bother doing any |
| 713 | // merging checks. |
| 714 | if (New->isInvalidDecl()) return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 715 | |
Steve Naroff | 2b255c4 | 2008-09-09 14:32:20 +0000 | [diff] [blame] | 716 | // Allow multiple definitions for ObjC built-in typedefs. |
| 717 | // FIXME: Verify the underlying types are equivalent! |
| 718 | if (getLangOptions().ObjC1) { |
Chris Lattner | 2bac0f6 | 2008-11-20 05:41:43 +0000 | [diff] [blame] | 719 | const IdentifierInfo *TypeID = New->getIdentifier(); |
| 720 | switch (TypeID->getLength()) { |
| 721 | default: break; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 722 | case 2: |
Chris Lattner | 2bac0f6 | 2008-11-20 05:41:43 +0000 | [diff] [blame] | 723 | if (!TypeID->isStr("id")) |
| 724 | break; |
David Chisnall | 0f43656 | 2009-08-17 16:35:33 +0000 | [diff] [blame] | 725 | Context.ObjCIdRedefinitionType = New->getUnderlyingType(); |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 726 | // Install the built-in type for 'id', ignoring the current definition. |
| 727 | New->setTypeForDecl(Context.getObjCIdType().getTypePtr()); |
| 728 | return; |
Chris Lattner | 2bac0f6 | 2008-11-20 05:41:43 +0000 | [diff] [blame] | 729 | case 5: |
| 730 | if (!TypeID->isStr("Class")) |
| 731 | break; |
David Chisnall | 0f43656 | 2009-08-17 16:35:33 +0000 | [diff] [blame] | 732 | Context.ObjCClassRedefinitionType = New->getUnderlyingType(); |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 733 | // Install the built-in type for 'Class', ignoring the current definition. |
| 734 | New->setTypeForDecl(Context.getObjCClassType().getTypePtr()); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 735 | return; |
Chris Lattner | 2bac0f6 | 2008-11-20 05:41:43 +0000 | [diff] [blame] | 736 | case 3: |
| 737 | if (!TypeID->isStr("SEL")) |
| 738 | break; |
Fariborz Jahanian | 369a3bd | 2009-11-25 23:07:42 +0000 | [diff] [blame] | 739 | Context.ObjCSelRedefinitionType = New->getUnderlyingType(); |
Fariborz Jahanian | 13dcd00 | 2009-11-21 19:53:08 +0000 | [diff] [blame] | 740 | // Install the built-in type for 'SEL', ignoring the current definition. |
| 741 | New->setTypeForDecl(Context.getObjCSelType().getTypePtr()); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 742 | return; |
Chris Lattner | 2bac0f6 | 2008-11-20 05:41:43 +0000 | [diff] [blame] | 743 | case 8: |
| 744 | if (!TypeID->isStr("Protocol")) |
| 745 | break; |
Steve Naroff | 2b255c4 | 2008-09-09 14:32:20 +0000 | [diff] [blame] | 746 | Context.setObjCProtoType(New->getUnderlyingType()); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 747 | return; |
Steve Naroff | 2b255c4 | 2008-09-09 14:32:20 +0000 | [diff] [blame] | 748 | } |
| 749 | // Fall through - the typedef name was not a builtin type. |
| 750 | } |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 751 | |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 752 | // Verify the old decl was also a type. |
John McCall | 5126fd0 | 2009-12-30 00:31:22 +0000 | [diff] [blame] | 753 | TypeDecl *Old = OldDecls.getAsSingle<TypeDecl>(); |
| 754 | if (!Old) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 755 | Diag(New->getLocation(), diag::err_redefinition_different_kind) |
Chris Lattner | 08631c5 | 2008-11-23 21:45:46 +0000 | [diff] [blame] | 756 | << New->getDeclName(); |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 757 | |
| 758 | NamedDecl *OldD = OldDecls.getRepresentativeDecl(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 759 | if (OldD->getLocation().isValid()) |
Fariborz Jahanian | c55a240 | 2009-01-16 19:58:32 +0000 | [diff] [blame] | 760 | Diag(OldD->getLocation(), diag::note_previous_definition); |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 761 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 762 | return New->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 763 | } |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 764 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 765 | // If the old declaration is invalid, just give up here. |
| 766 | if (Old->isInvalidDecl()) |
| 767 | return New->setInvalidDecl(); |
| 768 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 769 | // Determine the "old" type we'll use for checking and diagnostics. |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 770 | QualType OldType; |
| 771 | if (TypedefDecl *OldTypedef = dyn_cast<TypedefDecl>(Old)) |
| 772 | OldType = OldTypedef->getUnderlyingType(); |
| 773 | else |
| 774 | OldType = Context.getTypeDeclType(Old); |
| 775 | |
Chris Lattner | 99cb997 | 2008-07-25 18:44:27 +0000 | [diff] [blame] | 776 | // If the typedef types are not identical, reject them in all languages and |
| 777 | // with any extensions enabled. |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 778 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 779 | if (OldType != New->getUnderlyingType() && |
| 780 | Context.getCanonicalType(OldType) != |
Chris Lattner | 99cb997 | 2008-07-25 18:44:27 +0000 | [diff] [blame] | 781 | Context.getCanonicalType(New->getUnderlyingType())) { |
Chris Lattner | 5dc266a | 2008-11-20 06:13:02 +0000 | [diff] [blame] | 782 | Diag(New->getLocation(), diag::err_redefinition_different_typedef) |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 783 | << New->getUnderlyingType() << OldType; |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 784 | if (Old->getLocation().isValid()) |
Fariborz Jahanian | c55a240 | 2009-01-16 19:58:32 +0000 | [diff] [blame] | 785 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 786 | return New->setInvalidDecl(); |
Chris Lattner | 99cb997 | 2008-07-25 18:44:27 +0000 | [diff] [blame] | 787 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 788 | |
John McCall | 5126fd0 | 2009-12-30 00:31:22 +0000 | [diff] [blame] | 789 | // The types match. Link up the redeclaration chain if the old |
| 790 | // declaration was a typedef. |
| 791 | // FIXME: this is a potential source of wierdness if the type |
| 792 | // spellings don't match exactly. |
| 793 | if (isa<TypedefDecl>(Old)) |
| 794 | New->setPreviousDeclaration(cast<TypedefDecl>(Old)); |
| 795 | |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 796 | if (getLangOptions().Microsoft) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 797 | return; |
Eli Friedman | 54ecfce | 2008-06-11 06:20:39 +0000 | [diff] [blame] | 798 | |
Chris Lattner | 32b0675 | 2009-04-17 22:04:20 +0000 | [diff] [blame] | 799 | if (getLangOptions().CPlusPlus) { |
Douglas Gregor | 93dda72 | 2010-01-11 21:54:40 +0000 | [diff] [blame] | 800 | // C++ [dcl.typedef]p2: |
| 801 | // In a given non-class scope, a typedef specifier can be used to |
| 802 | // redefine the name of any type declared in that scope to refer |
| 803 | // to the type to which it already refers. |
Chris Lattner | 32b0675 | 2009-04-17 22:04:20 +0000 | [diff] [blame] | 804 | if (!isa<CXXRecordDecl>(CurContext)) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 805 | return; |
Douglas Gregor | 93dda72 | 2010-01-11 21:54:40 +0000 | [diff] [blame] | 806 | |
| 807 | // C++0x [dcl.typedef]p4: |
| 808 | // In a given class scope, a typedef specifier can be used to redefine |
| 809 | // any class-name declared in that scope that is not also a typedef-name |
| 810 | // to refer to the type to which it already refers. |
| 811 | // |
| 812 | // This wording came in via DR424, which was a correction to the |
| 813 | // wording in DR56, which accidentally banned code like: |
| 814 | // |
| 815 | // struct S { |
| 816 | // typedef struct A { } A; |
| 817 | // }; |
| 818 | // |
| 819 | // in the C++03 standard. We implement the C++0x semantics, which |
| 820 | // allow the above but disallow |
| 821 | // |
| 822 | // struct S { |
| 823 | // typedef int I; |
| 824 | // typedef int I; |
| 825 | // }; |
| 826 | // |
| 827 | // since that was the intent of DR56. |
Douglas Gregor | 05f6500 | 2010-01-11 22:30:10 +0000 | [diff] [blame] | 828 | if (!isa<TypedefDecl >(Old)) |
Douglas Gregor | 93dda72 | 2010-01-11 21:54:40 +0000 | [diff] [blame] | 829 | return; |
| 830 | |
Chris Lattner | 32b0675 | 2009-04-17 22:04:20 +0000 | [diff] [blame] | 831 | Diag(New->getLocation(), diag::err_redefinition) |
| 832 | << New->getDeclName(); |
| 833 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 834 | return New->setInvalidDecl(); |
Daniel Dunbar | 2fe0997 | 2008-09-12 18:10:20 +0000 | [diff] [blame] | 835 | } |
Eli Friedman | 54ecfce | 2008-06-11 06:20:39 +0000 | [diff] [blame] | 836 | |
Chris Lattner | 32b0675 | 2009-04-17 22:04:20 +0000 | [diff] [blame] | 837 | // If we have a redefinition of a typedef in C, emit a warning. This warning |
| 838 | // is normally mapped to an error, but can be controlled with |
Eli Friedman | 340a4e5 | 2009-06-04 23:03:07 +0000 | [diff] [blame] | 839 | // -Wtypedef-redefinition. If either the original or the redefinition is |
| 840 | // in a system header, don't emit this for compatibility with GCC. |
Chris Lattner | 6d97e5e | 2010-03-01 20:59:53 +0000 | [diff] [blame] | 841 | if (getDiagnostics().getSuppressSystemWarnings() && |
Eli Friedman | 340a4e5 | 2009-06-04 23:03:07 +0000 | [diff] [blame] | 842 | (Context.getSourceManager().isInSystemHeader(Old->getLocation()) || |
| 843 | Context.getSourceManager().isInSystemHeader(New->getLocation()))) |
Chris Lattner | d0359af | 2009-04-27 01:46:12 +0000 | [diff] [blame] | 844 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 845 | |
Chris Lattner | 32b0675 | 2009-04-17 22:04:20 +0000 | [diff] [blame] | 846 | Diag(New->getLocation(), diag::warn_redefinition_of_typedef) |
| 847 | << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 848 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 849 | return; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 850 | } |
| 851 | |
Chris Lattner | 6b6b537 | 2008-06-26 18:38:35 +0000 | [diff] [blame] | 852 | /// DeclhasAttr - returns true if decl Declaration already has the target |
| 853 | /// attribute. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 854 | static bool |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 855 | DeclHasAttr(const Decl *decl, const Attr *target) { |
| 856 | for (const Attr *attr = decl->getAttrs(); attr; attr = attr->getNext()) |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 857 | if (attr->getKind() == target->getKind()) |
| 858 | return true; |
| 859 | |
| 860 | return false; |
| 861 | } |
| 862 | |
| 863 | /// MergeAttributes - append attributes from the Old decl to the New one. |
Chris Lattner | cc58147 | 2009-03-04 06:05:19 +0000 | [diff] [blame] | 864 | static void MergeAttributes(Decl *New, Decl *Old, ASTContext &C) { |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 865 | for (const Attr *attr = Old->getAttrs(); attr; attr = attr->getNext()) { |
| 866 | if (!DeclHasAttr(New, attr) && attr->isMerged()) { |
Douglas Gregor | 9f9bf25 | 2009-04-28 06:37:30 +0000 | [diff] [blame] | 867 | Attr *NewAttr = attr->clone(C); |
| 868 | NewAttr->setInherited(true); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 869 | New->addAttr(NewAttr); |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 870 | } |
| 871 | } |
| 872 | } |
| 873 | |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 874 | /// Used in MergeFunctionDecl to keep track of function parameters in |
| 875 | /// C. |
| 876 | struct GNUCompatibleParamWarning { |
| 877 | ParmVarDecl *OldParm; |
| 878 | ParmVarDecl *NewParm; |
| 879 | QualType PromotedType; |
| 880 | }; |
| 881 | |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 882 | |
| 883 | /// getSpecialMember - get the special member enum for a method. |
| 884 | static Sema::CXXSpecialMember getSpecialMember(ASTContext &Ctx, |
| 885 | const CXXMethodDecl *MD) { |
| 886 | if (const CXXConstructorDecl *Ctor = dyn_cast<CXXConstructorDecl>(MD)) { |
| 887 | if (Ctor->isDefaultConstructor()) |
| 888 | return Sema::CXXDefaultConstructor; |
Douglas Gregor | 9e9199d | 2009-12-22 00:34:07 +0000 | [diff] [blame] | 889 | if (Ctor->isCopyConstructor()) |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 890 | return Sema::CXXCopyConstructor; |
| 891 | } |
| 892 | |
| 893 | if (isa<CXXDestructorDecl>(MD)) |
| 894 | return Sema::CXXDestructor; |
| 895 | |
| 896 | assert(MD->isCopyAssignment() && "Must have copy assignment operator"); |
| 897 | return Sema::CXXCopyAssignment; |
| 898 | } |
| 899 | |
Charles Davis | f3f8d2a | 2010-02-18 02:00:42 +0000 | [diff] [blame] | 900 | /// canREdefineFunction - checks if a function can be redefined. Currently, |
| 901 | /// only extern inline functions can be redefined, and even then only in |
| 902 | /// GNU89 mode. |
| 903 | static bool canRedefineFunction(const FunctionDecl *FD, |
| 904 | const LangOptions& LangOpts) { |
| 905 | return (LangOpts.GNUMode && !LangOpts.C99 && !LangOpts.CPlusPlus && |
| 906 | FD->isInlineSpecified() && |
| 907 | FD->getStorageClass() == FunctionDecl::Extern); |
| 908 | } |
| 909 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 910 | /// MergeFunctionDecl - We just parsed a function 'New' from |
| 911 | /// declarator D which has the same name and scope as a previous |
| 912 | /// declaration 'Old'. Figure out how to resolve this situation, |
| 913 | /// merging decls or emitting diagnostics as appropriate. |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 914 | /// |
| 915 | /// In C++, New and Old must be declarations that are not |
| 916 | /// overloaded. Use IsOverload to determine whether New and Old are |
| 917 | /// overloaded, and to select the Old declaration that New should be |
| 918 | /// merged with. |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 919 | /// |
| 920 | /// Returns true if there was an error, false otherwise. |
| 921 | bool Sema::MergeFunctionDecl(FunctionDecl *New, Decl *OldD) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 922 | // Verify the old decl was also a function. |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 923 | FunctionDecl *Old = 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 924 | if (FunctionTemplateDecl *OldFunctionTemplate |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 925 | = dyn_cast<FunctionTemplateDecl>(OldD)) |
| 926 | Old = OldFunctionTemplate->getTemplatedDecl(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 927 | else |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 928 | Old = dyn_cast<FunctionDecl>(OldD); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 929 | if (!Old) { |
John McCall | 41ce66f | 2009-12-10 19:51:03 +0000 | [diff] [blame] | 930 | if (UsingShadowDecl *Shadow = dyn_cast<UsingShadowDecl>(OldD)) { |
| 931 | Diag(New->getLocation(), diag::err_using_decl_conflict_reverse); |
| 932 | Diag(Shadow->getTargetDecl()->getLocation(), |
| 933 | diag::note_using_decl_target); |
| 934 | Diag(Shadow->getUsingDecl()->getLocation(), |
| 935 | diag::note_using_decl) << 0; |
| 936 | return true; |
| 937 | } |
| 938 | |
Chris Lattner | 5dc266a | 2008-11-20 06:13:02 +0000 | [diff] [blame] | 939 | Diag(New->getLocation(), diag::err_redefinition_different_kind) |
Chris Lattner | 08631c5 | 2008-11-23 21:45:46 +0000 | [diff] [blame] | 940 | << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 941 | Diag(OldD->getLocation(), diag::note_previous_definition); |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 942 | return true; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 943 | } |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 944 | |
| 945 | // Determine whether the previous declaration was a definition, |
| 946 | // implicit declaration, or a declaration. |
| 947 | diag::kind PrevDiag; |
| 948 | if (Old->isThisDeclarationADefinition()) |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 949 | PrevDiag = diag::note_previous_definition; |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 950 | else if (Old->isImplicit()) |
| 951 | PrevDiag = diag::note_previous_implicit_declaration; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 952 | else |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 953 | PrevDiag = diag::note_previous_declaration; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 954 | |
Chris Lattner | 8bcfc5b | 2008-04-06 23:10:54 +0000 | [diff] [blame] | 955 | QualType OldQType = Context.getCanonicalType(Old->getType()); |
| 956 | QualType NewQType = Context.getCanonicalType(New->getType()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 957 | |
Charles Davis | f3f8d2a | 2010-02-18 02:00:42 +0000 | [diff] [blame] | 958 | // Don't complain about this if we're in GNU89 mode and the old function |
| 959 | // is an extern inline function. |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 960 | if (!isa<CXXMethodDecl>(New) && !isa<CXXMethodDecl>(Old) && |
| 961 | New->getStorageClass() == FunctionDecl::Static && |
Charles Davis | f3f8d2a | 2010-02-18 02:00:42 +0000 | [diff] [blame] | 962 | Old->getStorageClass() != FunctionDecl::Static && |
| 963 | !canRedefineFunction(Old, getLangOptions())) { |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 964 | Diag(New->getLocation(), diag::err_static_non_static) |
| 965 | << New; |
| 966 | Diag(Old->getLocation(), PrevDiag); |
| 967 | return true; |
| 968 | } |
| 969 | |
John McCall | f82b4e8 | 2010-02-04 05:44:44 +0000 | [diff] [blame] | 970 | // If a function is first declared with a calling convention, but is |
| 971 | // later declared or defined without one, the second decl assumes the |
| 972 | // calling convention of the first. |
| 973 | // |
| 974 | // For the new decl, we have to look at the NON-canonical type to tell the |
| 975 | // difference between a function that really doesn't have a calling |
| 976 | // convention and one that is declared cdecl. That's because in |
| 977 | // canonicalization (see ASTContext.cpp), cdecl is canonicalized away |
| 978 | // because it is the default calling convention. |
| 979 | // |
| 980 | // Note also that we DO NOT return at this point, because we still have |
| 981 | // other tests to run. |
| 982 | const FunctionType *OldType = OldQType->getAs<FunctionType>(); |
| 983 | const FunctionType *NewType = New->getType()->getAs<FunctionType>(); |
| 984 | if (OldType->getCallConv() != CC_Default && |
| 985 | NewType->getCallConv() == CC_Default) { |
| 986 | NewQType = Context.getCallConvType(NewQType, OldType->getCallConv()); |
| 987 | New->setType(NewQType); |
| 988 | NewQType = Context.getCanonicalType(NewQType); |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame] | 989 | } else if (!Context.isSameCallConv(OldType->getCallConv(), |
| 990 | NewType->getCallConv())) { |
John McCall | f82b4e8 | 2010-02-04 05:44:44 +0000 | [diff] [blame] | 991 | // Calling conventions really aren't compatible, so complain. |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame] | 992 | Diag(New->getLocation(), diag::err_cconv_change) |
| 993 | << FunctionType::getNameForCallConv(NewType->getCallConv()) |
| 994 | << (OldType->getCallConv() == CC_Default) |
| 995 | << (OldType->getCallConv() == CC_Default ? "" : |
| 996 | FunctionType::getNameForCallConv(OldType->getCallConv())); |
| 997 | Diag(Old->getLocation(), diag::note_previous_declaration); |
John McCall | f82b4e8 | 2010-02-04 05:44:44 +0000 | [diff] [blame] | 998 | return true; |
| 999 | } |
| 1000 | |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame] | 1001 | // FIXME: diagnose the other way around? |
| 1002 | if (OldType->getNoReturnAttr() && !NewType->getNoReturnAttr()) { |
| 1003 | NewQType = Context.getNoReturnType(NewQType); |
| 1004 | New->setType(NewQType); |
| 1005 | assert(NewQType.isCanonical()); |
| 1006 | } |
| 1007 | |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1008 | if (getLangOptions().CPlusPlus) { |
| 1009 | // (C++98 13.1p2): |
| 1010 | // Certain function declarations cannot be overloaded: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1011 | // -- Function declarations that differ only in the return type |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1012 | // cannot be overloaded. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1013 | QualType OldReturnType |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1014 | = cast<FunctionType>(OldQType.getTypePtr())->getResultType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1015 | QualType NewReturnType |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1016 | = cast<FunctionType>(NewQType.getTypePtr())->getResultType(); |
| 1017 | if (OldReturnType != NewReturnType) { |
| 1018 | Diag(New->getLocation(), diag::err_ovl_diff_return_type); |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1019 | Diag(Old->getLocation(), PrevDiag) << Old << Old->getType(); |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1020 | return true; |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1021 | } |
| 1022 | |
| 1023 | const CXXMethodDecl* OldMethod = dyn_cast<CXXMethodDecl>(Old); |
| 1024 | const CXXMethodDecl* NewMethod = dyn_cast<CXXMethodDecl>(New); |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 1025 | if (OldMethod && NewMethod) { |
| 1026 | if (!NewMethod->getFriendObjectKind() && |
| 1027 | NewMethod->getLexicalDeclContext()->isRecord()) { |
| 1028 | // -- Member function declarations with the same name and the |
| 1029 | // same parameter types cannot be overloaded if any of them |
| 1030 | // is a static member function declaration. |
| 1031 | if (OldMethod->isStatic() || NewMethod->isStatic()) { |
| 1032 | Diag(New->getLocation(), diag::err_ovl_static_nonstatic_member); |
| 1033 | Diag(Old->getLocation(), PrevDiag) << Old << Old->getType(); |
| 1034 | return true; |
| 1035 | } |
| 1036 | |
| 1037 | // C++ [class.mem]p1: |
| 1038 | // [...] A member shall not be declared twice in the |
| 1039 | // member-specification, except that a nested class or member |
| 1040 | // class template can be declared and then later defined. |
| 1041 | unsigned NewDiag; |
| 1042 | if (isa<CXXConstructorDecl>(OldMethod)) |
| 1043 | NewDiag = diag::err_constructor_redeclared; |
| 1044 | else if (isa<CXXDestructorDecl>(NewMethod)) |
| 1045 | NewDiag = diag::err_destructor_redeclared; |
| 1046 | else if (isa<CXXConversionDecl>(NewMethod)) |
| 1047 | NewDiag = diag::err_conv_function_redeclared; |
| 1048 | else |
| 1049 | NewDiag = diag::err_member_redeclared; |
| 1050 | |
| 1051 | Diag(New->getLocation(), NewDiag); |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1052 | Diag(Old->getLocation(), PrevDiag) << Old << Old->getType(); |
Anders Carlsson | 5c478cf | 2009-12-04 22:33:25 +0000 | [diff] [blame] | 1053 | } else { |
| 1054 | if (OldMethod->isImplicit()) { |
| 1055 | Diag(NewMethod->getLocation(), |
| 1056 | diag::err_definition_of_implicitly_declared_member) |
| 1057 | << New << getSpecialMember(Context, OldMethod); |
| 1058 | |
| 1059 | Diag(OldMethod->getLocation(), |
| 1060 | diag::note_previous_implicit_declaration); |
| 1061 | return true; |
| 1062 | } |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1063 | } |
| 1064 | } |
| 1065 | |
| 1066 | // (C++98 8.3.5p3): |
| 1067 | // All declarations for a function shall agree exactly in both the |
| 1068 | // return type and the parameter-type-list. |
Nuno Lopes | f75b830 | 2009-12-23 23:40:33 +0000 | [diff] [blame] | 1069 | // attributes should be ignored when comparing. |
| 1070 | if (Context.getNoReturnType(OldQType, false) == |
| 1071 | Context.getNoReturnType(NewQType, false)) |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1072 | return MergeCompatibleFunctionDecls(New, Old); |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 1073 | |
| 1074 | // Fall through for conflicting redeclarations and redefinitions. |
Douglas Gregor | f009795 | 2008-04-21 02:02:58 +0000 | [diff] [blame] | 1075 | } |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 1076 | |
| 1077 | // C: Function types need to be compatible, not identical. This handles |
Steve Naroff | adbbd0c | 2008-01-14 20:51:29 +0000 | [diff] [blame] | 1078 | // duplicate function decls like "void f(int); void f(enum X);" properly. |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 1079 | if (!getLangOptions().CPlusPlus && |
Eli Friedman | 3d815e7 | 2008-08-22 00:56:42 +0000 | [diff] [blame] | 1080 | Context.typesAreCompatible(OldQType, NewQType)) { |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 1081 | const FunctionType *OldFuncType = OldQType->getAs<FunctionType>(); |
| 1082 | const FunctionType *NewFuncType = NewQType->getAs<FunctionType>(); |
Douglas Gregor | 72564e7 | 2009-02-26 23:50:07 +0000 | [diff] [blame] | 1083 | const FunctionProtoType *OldProto = 0; |
| 1084 | if (isa<FunctionNoProtoType>(NewFuncType) && |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1085 | (OldProto = dyn_cast<FunctionProtoType>(OldFuncType))) { |
Douglas Gregor | 6871981 | 2009-02-16 18:20:44 +0000 | [diff] [blame] | 1086 | // The old declaration provided a function prototype, but the |
| 1087 | // new declaration does not. Merge in the prototype. |
Sebastian Redl | 465226e | 2009-05-27 22:11:52 +0000 | [diff] [blame] | 1088 | assert(!OldProto->hasExceptionSpec() && "Exception spec in C"); |
Douglas Gregor | 6871981 | 2009-02-16 18:20:44 +0000 | [diff] [blame] | 1089 | llvm::SmallVector<QualType, 16> ParamTypes(OldProto->arg_type_begin(), |
| 1090 | OldProto->arg_type_end()); |
| 1091 | NewQType = Context.getFunctionType(NewFuncType->getResultType(), |
Jay Foad | beaaccd | 2009-05-21 09:52:38 +0000 | [diff] [blame] | 1092 | ParamTypes.data(), ParamTypes.size(), |
Douglas Gregor | 6871981 | 2009-02-16 18:20:44 +0000 | [diff] [blame] | 1093 | OldProto->isVariadic(), |
Douglas Gregor | ce056bc | 2010-02-21 22:15:06 +0000 | [diff] [blame] | 1094 | OldProto->getTypeQuals(), |
| 1095 | false, false, 0, 0, |
| 1096 | OldProto->getNoReturnAttr(), |
| 1097 | OldProto->getCallConv()); |
Douglas Gregor | 6871981 | 2009-02-16 18:20:44 +0000 | [diff] [blame] | 1098 | New->setType(NewQType); |
Anders Carlsson | a75e853 | 2009-05-14 21:46:00 +0000 | [diff] [blame] | 1099 | New->setHasInheritedPrototype(); |
Douglas Gregor | 450da98 | 2009-02-16 20:58:07 +0000 | [diff] [blame] | 1100 | |
| 1101 | // Synthesize a parameter for each argument type. |
| 1102 | llvm::SmallVector<ParmVarDecl*, 16> Params; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1103 | for (FunctionProtoType::arg_type_iterator |
| 1104 | ParamType = OldProto->arg_type_begin(), |
Douglas Gregor | 450da98 | 2009-02-16 20:58:07 +0000 | [diff] [blame] | 1105 | ParamEnd = OldProto->arg_type_end(); |
| 1106 | ParamType != ParamEnd; ++ParamType) { |
| 1107 | ParmVarDecl *Param = ParmVarDecl::Create(Context, New, |
| 1108 | SourceLocation(), 0, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 1109 | *ParamType, /*TInfo=*/0, |
Argyrios Kyrtzidis | a1d5662 | 2009-08-19 01:27:57 +0000 | [diff] [blame] | 1110 | VarDecl::None, 0); |
Douglas Gregor | 450da98 | 2009-02-16 20:58:07 +0000 | [diff] [blame] | 1111 | Param->setImplicit(); |
| 1112 | Params.push_back(Param); |
| 1113 | } |
| 1114 | |
Douglas Gregor | 838db38 | 2010-02-11 01:19:42 +0000 | [diff] [blame] | 1115 | New->setParams(Params.data(), Params.size()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1116 | } |
Douglas Gregor | 6871981 | 2009-02-16 18:20:44 +0000 | [diff] [blame] | 1117 | |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1118 | return MergeCompatibleFunctionDecls(New, Old); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 1119 | } |
Chris Lattner | e3995fe | 2007-11-06 06:07:26 +0000 | [diff] [blame] | 1120 | |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1121 | // GNU C permits a K&R definition to follow a prototype declaration |
| 1122 | // if the declared types of the parameters in the K&R definition |
| 1123 | // match the types in the prototype declaration, even when the |
| 1124 | // promoted types of the parameters from the K&R definition differ |
| 1125 | // from the types in the prototype. GCC then keeps the types from |
| 1126 | // the prototype. |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 1127 | // |
| 1128 | // If a variadic prototype is followed by a non-variadic K&R definition, |
| 1129 | // the K&R definition becomes variadic. This is sort of an edge case, but |
| 1130 | // it's legal per the standard depending on how you read C99 6.7.5.3p15 and |
| 1131 | // C99 6.9.1p8. |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1132 | if (!getLangOptions().CPlusPlus && |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1133 | Old->hasPrototype() && !New->hasPrototype() && |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 1134 | New->getType()->getAs<FunctionProtoType>() && |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1135 | Old->getNumParams() == New->getNumParams()) { |
| 1136 | llvm::SmallVector<QualType, 16> ArgTypes; |
| 1137 | llvm::SmallVector<GNUCompatibleParamWarning, 16> Warnings; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1138 | const FunctionProtoType *OldProto |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 1139 | = Old->getType()->getAs<FunctionProtoType>(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1140 | const FunctionProtoType *NewProto |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 1141 | = New->getType()->getAs<FunctionProtoType>(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1142 | |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1143 | // Determine whether this is the GNU C extension. |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 1144 | QualType MergedReturn = Context.mergeTypes(OldProto->getResultType(), |
| 1145 | NewProto->getResultType()); |
| 1146 | bool LooseCompatible = !MergedReturn.isNull(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1147 | for (unsigned Idx = 0, End = Old->getNumParams(); |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 1148 | LooseCompatible && Idx != End; ++Idx) { |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1149 | ParmVarDecl *OldParm = Old->getParamDecl(Idx); |
| 1150 | ParmVarDecl *NewParm = New->getParamDecl(Idx); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1151 | if (Context.typesAreCompatible(OldParm->getType(), |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1152 | NewProto->getArgType(Idx))) { |
| 1153 | ArgTypes.push_back(NewParm->getType()); |
| 1154 | } else if (Context.typesAreCompatible(OldParm->getType(), |
| 1155 | NewParm->getType())) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1156 | GNUCompatibleParamWarning Warn |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1157 | = { OldParm, NewParm, NewProto->getArgType(Idx) }; |
| 1158 | Warnings.push_back(Warn); |
| 1159 | ArgTypes.push_back(NewParm->getType()); |
| 1160 | } else |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 1161 | LooseCompatible = false; |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1162 | } |
| 1163 | |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 1164 | if (LooseCompatible) { |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1165 | for (unsigned Warn = 0; Warn < Warnings.size(); ++Warn) { |
| 1166 | Diag(Warnings[Warn].NewParm->getLocation(), |
| 1167 | diag::ext_param_promoted_not_compatible_with_prototype) |
| 1168 | << Warnings[Warn].PromotedType |
| 1169 | << Warnings[Warn].OldParm->getType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1170 | Diag(Warnings[Warn].OldParm->getLocation(), |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1171 | diag::note_previous_declaration); |
| 1172 | } |
| 1173 | |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 1174 | New->setType(Context.getFunctionType(MergedReturn, &ArgTypes[0], |
| 1175 | ArgTypes.size(), |
Douglas Gregor | ce056bc | 2010-02-21 22:15:06 +0000 | [diff] [blame] | 1176 | OldProto->isVariadic(), 0, |
| 1177 | false, false, 0, 0, |
| 1178 | OldProto->getNoReturnAttr(), |
| 1179 | OldProto->getCallConv())); |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 1180 | return MergeCompatibleFunctionDecls(New, Old); |
| 1181 | } |
| 1182 | |
| 1183 | // Fall through to diagnose conflicting types. |
| 1184 | } |
| 1185 | |
Steve Naroff | 837618c | 2008-01-16 15:01:34 +0000 | [diff] [blame] | 1186 | // A function that has already been declared has been redeclared or defined |
| 1187 | // with a different type- show appropriate diagnostic |
Douglas Gregor | 7814e6d | 2009-09-12 00:22:50 +0000 | [diff] [blame] | 1188 | if (unsigned BuiltinID = Old->getBuiltinID()) { |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1189 | // The user has declared a builtin function with an incompatible |
| 1190 | // signature. |
| 1191 | if (Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) { |
| 1192 | // The function the user is redeclaring is a library-defined |
| 1193 | // function like 'malloc' or 'printf'. Warn about the |
Douglas Gregor | 374e156 | 2009-03-23 17:47:24 +0000 | [diff] [blame] | 1194 | // redeclaration, then pretend that we don't know about this |
| 1195 | // library built-in. |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1196 | Diag(New->getLocation(), diag::warn_redecl_library_builtin) << New; |
| 1197 | Diag(Old->getLocation(), diag::note_previous_builtin_declaration) |
| 1198 | << Old << Old->getType(); |
Douglas Gregor | 374e156 | 2009-03-23 17:47:24 +0000 | [diff] [blame] | 1199 | New->getIdentifier()->setBuiltinID(Builtin::NotBuiltin); |
| 1200 | Old->setInvalidDecl(); |
| 1201 | return false; |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1202 | } |
Steve Naroff | 837618c | 2008-01-16 15:01:34 +0000 | [diff] [blame] | 1203 | |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1204 | PrevDiag = diag::note_previous_builtin_declaration; |
| 1205 | } |
| 1206 | |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 1207 | Diag(New->getLocation(), diag::err_conflicting_types) << New->getDeclName(); |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1208 | Diag(Old->getLocation(), PrevDiag) << Old << Old->getType(); |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1209 | return true; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1210 | } |
| 1211 | |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1212 | /// \brief Completes the merge of two function declarations that are |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1213 | /// known to be compatible. |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1214 | /// |
| 1215 | /// This routine handles the merging of attributes and other |
| 1216 | /// properties of function declarations form the old declaration to |
| 1217 | /// the new declaration, once we know that New is in fact a |
| 1218 | /// redeclaration of Old. |
| 1219 | /// |
| 1220 | /// \returns false |
| 1221 | bool Sema::MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old) { |
| 1222 | // Merge the attributes |
Chris Lattner | cc58147 | 2009-03-04 06:05:19 +0000 | [diff] [blame] | 1223 | MergeAttributes(New, Old, Context); |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1224 | |
| 1225 | // Merge the storage class. |
Douglas Gregor | 1fc09a9 | 2009-09-13 07:46:26 +0000 | [diff] [blame] | 1226 | if (Old->getStorageClass() != FunctionDecl::Extern && |
| 1227 | Old->getStorageClass() != FunctionDecl::None) |
Douglas Gregor | 9f9bf25 | 2009-04-28 06:37:30 +0000 | [diff] [blame] | 1228 | New->setStorageClass(Old->getStorageClass()); |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1229 | |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1230 | // Merge "pure" flag. |
| 1231 | if (Old->isPure()) |
| 1232 | New->setPure(); |
| 1233 | |
| 1234 | // Merge the "deleted" flag. |
| 1235 | if (Old->isDeleted()) |
| 1236 | New->setDeleted(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1237 | |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 1238 | if (getLangOptions().CPlusPlus) |
| 1239 | return MergeCXXFunctionDecl(New, Old); |
| 1240 | |
| 1241 | return false; |
| 1242 | } |
| 1243 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1244 | /// MergeVarDecl - We just parsed a variable 'New' which has the same name |
| 1245 | /// and scope as a previous declaration 'Old'. Figure out how to resolve this |
| 1246 | /// situation, merging decls or emitting diagnostics as appropriate. |
| 1247 | /// |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1248 | /// Tentative definition rules (C99 6.9.2p2) are checked by |
| 1249 | /// FinalizeDeclaratorGroup. Unfortunately, we can't analyze tentative |
Steve Naroff | ff9eb1f | 2008-08-08 17:50:35 +0000 | [diff] [blame] | 1250 | /// definitions here, since the initializer hasn't been attached. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1251 | /// |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1252 | void Sema::MergeVarDecl(VarDecl *New, LookupResult &Previous) { |
| 1253 | // If the new decl is already invalid, don't do any other checking. |
| 1254 | if (New->isInvalidDecl()) |
| 1255 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1256 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1257 | // Verify the old decl was also a variable. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1258 | VarDecl *Old = 0; |
| 1259 | if (!Previous.isSingleResult() || |
| 1260 | !(Old = dyn_cast<VarDecl>(Previous.getFoundDecl()))) { |
Chris Lattner | f3a41af | 2008-11-20 06:38:18 +0000 | [diff] [blame] | 1261 | Diag(New->getLocation(), diag::err_redefinition_different_kind) |
Chris Lattner | 08631c5 | 2008-11-23 21:45:46 +0000 | [diff] [blame] | 1262 | << New->getDeclName(); |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1263 | Diag(Previous.getRepresentativeDecl()->getLocation(), |
| 1264 | diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1265 | return New->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1266 | } |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 1267 | |
Chris Lattner | cc58147 | 2009-03-04 06:05:19 +0000 | [diff] [blame] | 1268 | MergeAttributes(New, Old, Context); |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 1269 | |
Eli Friedman | 13ca96a | 2009-01-24 23:49:55 +0000 | [diff] [blame] | 1270 | // Merge the types |
Eli Friedman | 88d936b | 2009-05-16 13:54:38 +0000 | [diff] [blame] | 1271 | QualType MergedT; |
| 1272 | if (getLangOptions().CPlusPlus) { |
| 1273 | if (Context.hasSameType(New->getType(), Old->getType())) |
| 1274 | MergedT = New->getType(); |
Eli Friedman | 153c33e | 2009-12-10 08:54:47 +0000 | [diff] [blame] | 1275 | // C++ [basic.link]p10: |
| 1276 | // [...] the types specified by all declarations referring to a given |
| 1277 | // object or function shall be identical, except that declarations for an |
| 1278 | // array object can specify array types that differ by the presence or |
| 1279 | // absence of a major array bound (8.3.4). |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1280 | else if (Old->getType()->isIncompleteArrayType() && |
Douglas Gregor | 8dfb7ec | 2009-09-09 06:04:29 +0000 | [diff] [blame] | 1281 | New->getType()->isArrayType()) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1282 | CanQual<ArrayType> OldArray |
Douglas Gregor | 8dfb7ec | 2009-09-09 06:04:29 +0000 | [diff] [blame] | 1283 | = Context.getCanonicalType(Old->getType())->getAs<ArrayType>(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1284 | CanQual<ArrayType> NewArray |
Douglas Gregor | 8dfb7ec | 2009-09-09 06:04:29 +0000 | [diff] [blame] | 1285 | = Context.getCanonicalType(New->getType())->getAs<ArrayType>(); |
| 1286 | if (OldArray->getElementType() == NewArray->getElementType()) |
| 1287 | MergedT = New->getType(); |
Eli Friedman | 153c33e | 2009-12-10 08:54:47 +0000 | [diff] [blame] | 1288 | } else if (Old->getType()->isArrayType() && |
| 1289 | New->getType()->isIncompleteArrayType()) { |
| 1290 | CanQual<ArrayType> OldArray |
| 1291 | = Context.getCanonicalType(Old->getType())->getAs<ArrayType>(); |
| 1292 | CanQual<ArrayType> NewArray |
| 1293 | = Context.getCanonicalType(New->getType())->getAs<ArrayType>(); |
| 1294 | if (OldArray->getElementType() == NewArray->getElementType()) |
| 1295 | MergedT = Old->getType(); |
Douglas Gregor | 8dfb7ec | 2009-09-09 06:04:29 +0000 | [diff] [blame] | 1296 | } |
Eli Friedman | 88d936b | 2009-05-16 13:54:38 +0000 | [diff] [blame] | 1297 | } else { |
| 1298 | MergedT = Context.mergeTypes(New->getType(), Old->getType()); |
| 1299 | } |
Eli Friedman | 13ca96a | 2009-01-24 23:49:55 +0000 | [diff] [blame] | 1300 | if (MergedT.isNull()) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1301 | Diag(New->getLocation(), diag::err_redefinition_different_type) |
Douglas Gregor | 6037fcb | 2009-01-09 19:42:16 +0000 | [diff] [blame] | 1302 | << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 1303 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1304 | return New->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1305 | } |
Eli Friedman | 13ca96a | 2009-01-24 23:49:55 +0000 | [diff] [blame] | 1306 | New->setType(MergedT); |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 1307 | |
Steve Naroff | b7b032e | 2008-01-30 00:44:01 +0000 | [diff] [blame] | 1308 | // C99 6.2.2p4: Check if we have a static decl followed by a non-static. |
| 1309 | if (New->getStorageClass() == VarDecl::Static && |
Daniel Dunbar | 5466c7b | 2009-04-14 02:25:56 +0000 | [diff] [blame] | 1310 | (Old->getStorageClass() == VarDecl::None || Old->hasExternalStorage())) { |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 1311 | Diag(New->getLocation(), diag::err_static_non_static) << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 1312 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1313 | return New->setInvalidDecl(); |
Steve Naroff | b7b032e | 2008-01-30 00:44:01 +0000 | [diff] [blame] | 1314 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1315 | // C99 6.2.2p4: |
Douglas Gregor | 5ef122e | 2009-03-19 22:01:50 +0000 | [diff] [blame] | 1316 | // For an identifier declared with the storage-class specifier |
| 1317 | // extern in a scope in which a prior declaration of that |
| 1318 | // identifier is visible,23) if the prior declaration specifies |
| 1319 | // internal or external linkage, the linkage of the identifier at |
| 1320 | // the later declaration is the same as the linkage specified at |
| 1321 | // the prior declaration. If no prior declaration is visible, or |
| 1322 | // if the prior declaration specifies no linkage, then the |
| 1323 | // identifier has external linkage. |
Douglas Gregor | 38179b2 | 2009-03-23 16:17:01 +0000 | [diff] [blame] | 1324 | if (New->hasExternalStorage() && Old->hasLinkage()) |
Douglas Gregor | 5ef122e | 2009-03-19 22:01:50 +0000 | [diff] [blame] | 1325 | /* Okay */; |
| 1326 | else if (New->getStorageClass() != VarDecl::Static && |
| 1327 | Old->getStorageClass() == VarDecl::Static) { |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 1328 | Diag(New->getLocation(), diag::err_non_static_static) << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 1329 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1330 | return New->setInvalidDecl(); |
Steve Naroff | b7b032e | 2008-01-30 00:44:01 +0000 | [diff] [blame] | 1331 | } |
Daniel Dunbar | 5466c7b | 2009-04-14 02:25:56 +0000 | [diff] [blame] | 1332 | |
Steve Naroff | 094cefb | 2008-09-17 14:05:40 +0000 | [diff] [blame] | 1333 | // Variables with external linkage are analyzed in FinalizeDeclaratorGroup. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1334 | |
Daniel Dunbar | 5466c7b | 2009-04-14 02:25:56 +0000 | [diff] [blame] | 1335 | // FIXME: The test for external storage here seems wrong? We still |
| 1336 | // need to check for mismatches. |
| 1337 | if (!New->hasExternalStorage() && !New->isFileVarDecl() && |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 1338 | // Don't complain about out-of-line definitions of static members. |
| 1339 | !(Old->getLexicalDeclContext()->isRecord() && |
| 1340 | !New->getLexicalDeclContext()->isRecord())) { |
Chris Lattner | 08631c5 | 2008-11-23 21:45:46 +0000 | [diff] [blame] | 1341 | Diag(New->getLocation(), diag::err_redefinition) << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 1342 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1343 | return New->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1344 | } |
Douglas Gregor | 275a369 | 2009-03-10 23:43:53 +0000 | [diff] [blame] | 1345 | |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 1346 | if (New->isThreadSpecified() && !Old->isThreadSpecified()) { |
| 1347 | Diag(New->getLocation(), diag::err_thread_non_thread) << New->getDeclName(); |
| 1348 | Diag(Old->getLocation(), diag::note_previous_definition); |
| 1349 | } else if (!New->isThreadSpecified() && Old->isThreadSpecified()) { |
| 1350 | Diag(New->getLocation(), diag::err_non_thread_thread) << New->getDeclName(); |
| 1351 | Diag(Old->getLocation(), diag::note_previous_definition); |
| 1352 | } |
| 1353 | |
Sebastian Redl | 4cae1b3 | 2010-02-02 18:35:11 +0000 | [diff] [blame] | 1354 | // C++ doesn't have tentative definitions, so go right ahead and check here. |
| 1355 | const VarDecl *Def; |
Sebastian Redl | 6c048a9 | 2010-02-03 02:08:48 +0000 | [diff] [blame] | 1356 | if (getLangOptions().CPlusPlus && |
| 1357 | New->isThisDeclarationADefinition() == VarDecl::Definition && |
Sebastian Redl | 4cae1b3 | 2010-02-02 18:35:11 +0000 | [diff] [blame] | 1358 | (Def = Old->getDefinition())) { |
| 1359 | Diag(New->getLocation(), diag::err_redefinition) |
| 1360 | << New->getDeclName(); |
| 1361 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 1362 | New->setInvalidDecl(); |
| 1363 | return; |
| 1364 | } |
| 1365 | |
Douglas Gregor | 275a369 | 2009-03-10 23:43:53 +0000 | [diff] [blame] | 1366 | // Keep a chain of previous declarations. |
| 1367 | New->setPreviousDeclaration(Old); |
John McCall | 46460a6 | 2010-01-20 21:53:11 +0000 | [diff] [blame] | 1368 | |
| 1369 | // Inherit access appropriately. |
| 1370 | New->setAccess(Old->getAccess()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1371 | } |
| 1372 | |
| 1373 | /// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with |
| 1374 | /// no declarator (e.g. "struct foo;") is parsed. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1375 | Sema::DeclPtrTy Sema::ParsedFreeStandingDeclSpec(Scope *S, DeclSpec &DS) { |
Eli Friedman | d296836 | 2009-04-09 21:26:42 +0000 | [diff] [blame] | 1376 | // FIXME: Error on auto/register at file scope |
| 1377 | // FIXME: Error on inline/virtual/explicit |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 1378 | // FIXME: Warn on useless __thread |
Eli Friedman | d296836 | 2009-04-09 21:26:42 +0000 | [diff] [blame] | 1379 | // FIXME: Warn on useless const/volatile |
| 1380 | // FIXME: Warn on useless static/extern/typedef/private_extern/mutable |
| 1381 | // FIXME: Warn on useless attributes |
John McCall | e3af023 | 2009-10-07 23:34:25 +0000 | [diff] [blame] | 1382 | Decl *TagD = 0; |
Douglas Gregor | 1a51b4a | 2009-02-09 15:09:02 +0000 | [diff] [blame] | 1383 | TagDecl *Tag = 0; |
| 1384 | if (DS.getTypeSpecType() == DeclSpec::TST_class || |
| 1385 | DS.getTypeSpecType() == DeclSpec::TST_struct || |
| 1386 | DS.getTypeSpecType() == DeclSpec::TST_union || |
Douglas Gregor | 4d9a16f | 2009-05-12 23:25:50 +0000 | [diff] [blame] | 1387 | DS.getTypeSpecType() == DeclSpec::TST_enum) { |
John McCall | e3af023 | 2009-10-07 23:34:25 +0000 | [diff] [blame] | 1388 | TagD = static_cast<Decl *>(DS.getTypeRep()); |
| 1389 | |
| 1390 | if (!TagD) // We probably had an error |
Douglas Gregor | 4d9a16f | 2009-05-12 23:25:50 +0000 | [diff] [blame] | 1391 | return DeclPtrTy(); |
| 1392 | |
John McCall | 67d1a67 | 2009-08-06 02:15:43 +0000 | [diff] [blame] | 1393 | // Note that the above type specs guarantee that the |
| 1394 | // type rep is a Decl, whereas in many of the others |
| 1395 | // it's a Type. |
John McCall | e3af023 | 2009-10-07 23:34:25 +0000 | [diff] [blame] | 1396 | Tag = dyn_cast<TagDecl>(TagD); |
Douglas Gregor | 4d9a16f | 2009-05-12 23:25:50 +0000 | [diff] [blame] | 1397 | } |
Douglas Gregor | 1a51b4a | 2009-02-09 15:09:02 +0000 | [diff] [blame] | 1398 | |
Nuno Lopes | 0a8bab0 | 2009-12-17 11:35:26 +0000 | [diff] [blame] | 1399 | if (unsigned TypeQuals = DS.getTypeQualifiers()) { |
| 1400 | // Enforce C99 6.7.3p2: "Types other than pointer types derived from object |
| 1401 | // or incomplete types shall not be restrict-qualified." |
| 1402 | if (TypeQuals & DeclSpec::TQ_restrict) |
| 1403 | Diag(DS.getRestrictSpecLoc(), |
| 1404 | diag::err_typecheck_invalid_restrict_not_pointer_noarg) |
| 1405 | << DS.getSourceRange(); |
| 1406 | } |
| 1407 | |
Douglas Gregor | d85bea2 | 2009-09-26 06:47:28 +0000 | [diff] [blame] | 1408 | if (DS.isFriendSpecified()) { |
John McCall | e3af023 | 2009-10-07 23:34:25 +0000 | [diff] [blame] | 1409 | // If we're dealing with a class template decl, assume that the |
| 1410 | // template routines are handling it. |
| 1411 | if (TagD && isa<ClassTemplateDecl>(TagD)) |
Douglas Gregor | d85bea2 | 2009-09-26 06:47:28 +0000 | [diff] [blame] | 1412 | return DeclPtrTy(); |
John McCall | e3af023 | 2009-10-07 23:34:25 +0000 | [diff] [blame] | 1413 | return ActOnFriendTypeDecl(S, DS, MultiTemplateParamsArg(*this, 0, 0)); |
Douglas Gregor | d85bea2 | 2009-09-26 06:47:28 +0000 | [diff] [blame] | 1414 | } |
| 1415 | |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 1416 | if (RecordDecl *Record = dyn_cast_or_null<RecordDecl>(Tag)) { |
Chris Lattner | d451f83 | 2009-10-25 22:21:57 +0000 | [diff] [blame] | 1417 | // If there are attributes in the DeclSpec, apply them to the record. |
| 1418 | if (const AttributeList *AL = DS.getAttributes()) |
| 1419 | ProcessDeclAttributeList(S, Record, AL); |
| 1420 | |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 1421 | if (!Record->getDeclName() && Record->isDefinition() && |
Douglas Gregor | a71c129 | 2009-03-06 23:06:59 +0000 | [diff] [blame] | 1422 | DS.getStorageClassSpec() != DeclSpec::SCS_typedef) { |
| 1423 | if (getLangOptions().CPlusPlus || |
| 1424 | Record->getDeclContext()->isRecord()) |
| 1425 | return BuildAnonymousStructOrUnion(S, DS, Record); |
| 1426 | |
| 1427 | Diag(DS.getSourceRange().getBegin(), diag::err_no_declarators) |
| 1428 | << DS.getSourceRange(); |
| 1429 | } |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 1430 | |
| 1431 | // Microsoft allows unnamed struct/union fields. Don't complain |
| 1432 | // about them. |
| 1433 | // FIXME: Should we support Microsoft's extensions in this area? |
| 1434 | if (Record->getDeclName() && getLangOptions().Microsoft) |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1435 | return DeclPtrTy::make(Tag); |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 1436 | } |
Douglas Gregor | d85bea2 | 2009-09-26 06:47:28 +0000 | [diff] [blame] | 1437 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1438 | if (!DS.isMissingDeclaratorOk() && |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 1439 | DS.getTypeSpecType() != DeclSpec::TST_error) { |
Douglas Gregor | 21282df | 2009-01-22 16:23:54 +0000 | [diff] [blame] | 1440 | // Warn about typedefs of enums without names, since this is an |
| 1441 | // extension in both Microsoft an GNU. |
Douglas Gregor | 8158f69 | 2009-01-17 02:55:50 +0000 | [diff] [blame] | 1442 | if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef && |
| 1443 | Tag && isa<EnumDecl>(Tag)) { |
Douglas Gregor | 21282df | 2009-01-22 16:23:54 +0000 | [diff] [blame] | 1444 | Diag(DS.getSourceRange().getBegin(), diag::ext_typedef_without_a_name) |
Douglas Gregor | ee159c1 | 2009-01-13 23:10:51 +0000 | [diff] [blame] | 1445 | << DS.getSourceRange(); |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1446 | return DeclPtrTy::make(Tag); |
Douglas Gregor | ee159c1 | 2009-01-13 23:10:51 +0000 | [diff] [blame] | 1447 | } |
| 1448 | |
Sebastian Redl | a4ed0d8 | 2008-12-28 15:28:59 +0000 | [diff] [blame] | 1449 | Diag(DS.getSourceRange().getBegin(), diag::err_no_declarators) |
| 1450 | << DS.getSourceRange(); |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1451 | return DeclPtrTy(); |
Sebastian Redl | a4ed0d8 | 2008-12-28 15:28:59 +0000 | [diff] [blame] | 1452 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1453 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1454 | return DeclPtrTy::make(Tag); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1455 | } |
| 1456 | |
John McCall | 1d7c528 | 2009-12-18 10:40:03 +0000 | [diff] [blame] | 1457 | /// We are trying to inject an anonymous member into the given scope; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1458 | /// check if there's an existing declaration that can't be overloaded. |
| 1459 | /// |
| 1460 | /// \return true if this is a forbidden redeclaration |
John McCall | 1d7c528 | 2009-12-18 10:40:03 +0000 | [diff] [blame] | 1461 | static bool CheckAnonMemberRedeclaration(Sema &SemaRef, |
| 1462 | Scope *S, |
Fariborz Jahanian | 588a4ad | 2010-01-22 18:30:17 +0000 | [diff] [blame] | 1463 | DeclContext *Owner, |
John McCall | 1d7c528 | 2009-12-18 10:40:03 +0000 | [diff] [blame] | 1464 | DeclarationName Name, |
| 1465 | SourceLocation NameLoc, |
| 1466 | unsigned diagnostic) { |
| 1467 | LookupResult R(SemaRef, Name, NameLoc, Sema::LookupMemberName, |
| 1468 | Sema::ForRedeclaration); |
| 1469 | if (!SemaRef.LookupName(R, S)) return false; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1470 | |
John McCall | 1d7c528 | 2009-12-18 10:40:03 +0000 | [diff] [blame] | 1471 | if (R.getAsSingle<TagDecl>()) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1472 | return false; |
| 1473 | |
| 1474 | // Pick a representative declaration. |
John McCall | 1d7c528 | 2009-12-18 10:40:03 +0000 | [diff] [blame] | 1475 | NamedDecl *PrevDecl = R.getRepresentativeDecl()->getUnderlyingDecl(); |
Fariborz Jahanian | 588a4ad | 2010-01-22 18:30:17 +0000 | [diff] [blame] | 1476 | if (PrevDecl && Owner->isRecord()) { |
| 1477 | RecordDecl *Record = cast<RecordDecl>(Owner); |
| 1478 | if (!SemaRef.isDeclInScope(PrevDecl, Record, S)) |
| 1479 | return false; |
| 1480 | } |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1481 | |
John McCall | 1d7c528 | 2009-12-18 10:40:03 +0000 | [diff] [blame] | 1482 | SemaRef.Diag(NameLoc, diagnostic) << Name; |
| 1483 | SemaRef.Diag(PrevDecl->getLocation(), diag::note_previous_declaration); |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1484 | |
| 1485 | return true; |
| 1486 | } |
| 1487 | |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1488 | /// InjectAnonymousStructOrUnionMembers - Inject the members of the |
| 1489 | /// anonymous struct or union AnonRecord into the owning context Owner |
| 1490 | /// and scope S. This routine will be invoked just after we realize |
| 1491 | /// that an unnamed union or struct is actually an anonymous union or |
| 1492 | /// struct, e.g., |
| 1493 | /// |
| 1494 | /// @code |
| 1495 | /// union { |
| 1496 | /// int i; |
| 1497 | /// float f; |
| 1498 | /// }; // InjectAnonymousStructOrUnionMembers called here to inject i and |
| 1499 | /// // f into the surrounding scope.x |
| 1500 | /// @endcode |
| 1501 | /// |
| 1502 | /// This routine is recursive, injecting the names of nested anonymous |
| 1503 | /// structs/unions into the owning context and scope as well. |
| 1504 | bool Sema::InjectAnonymousStructOrUnionMembers(Scope *S, DeclContext *Owner, |
| 1505 | RecordDecl *AnonRecord) { |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1506 | unsigned diagKind |
| 1507 | = AnonRecord->isUnion() ? diag::err_anonymous_union_member_redecl |
| 1508 | : diag::err_anonymous_struct_member_redecl; |
| 1509 | |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1510 | bool Invalid = false; |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1511 | for (RecordDecl::field_iterator F = AnonRecord->field_begin(), |
| 1512 | FEnd = AnonRecord->field_end(); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1513 | F != FEnd; ++F) { |
| 1514 | if ((*F)->getDeclName()) { |
Fariborz Jahanian | 588a4ad | 2010-01-22 18:30:17 +0000 | [diff] [blame] | 1515 | if (CheckAnonMemberRedeclaration(*this, S, Owner, (*F)->getDeclName(), |
John McCall | 1d7c528 | 2009-12-18 10:40:03 +0000 | [diff] [blame] | 1516 | (*F)->getLocation(), diagKind)) { |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1517 | // C++ [class.union]p2: |
| 1518 | // The names of the members of an anonymous union shall be |
| 1519 | // distinct from the names of any other entity in the |
| 1520 | // scope in which the anonymous union is declared. |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1521 | Invalid = true; |
| 1522 | } else { |
| 1523 | // C++ [class.union]p2: |
| 1524 | // For the purpose of name lookup, after the anonymous union |
| 1525 | // definition, the members of the anonymous union are |
| 1526 | // considered to have been defined in the scope in which the |
| 1527 | // anonymous union is declared. |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1528 | Owner->makeDeclVisibleInContext(*F); |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1529 | S->AddDecl(DeclPtrTy::make(*F)); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1530 | IdResolver.AddDecl(*F); |
| 1531 | } |
| 1532 | } else if (const RecordType *InnerRecordType |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 1533 | = (*F)->getType()->getAs<RecordType>()) { |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1534 | RecordDecl *InnerRecord = InnerRecordType->getDecl(); |
| 1535 | if (InnerRecord->isAnonymousStructOrUnion()) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1536 | Invalid = Invalid || |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1537 | InjectAnonymousStructOrUnionMembers(S, Owner, InnerRecord); |
| 1538 | } |
| 1539 | } |
| 1540 | |
| 1541 | return Invalid; |
| 1542 | } |
| 1543 | |
| 1544 | /// ActOnAnonymousStructOrUnion - Handle the declaration of an |
| 1545 | /// anonymous structure or union. Anonymous unions are a C++ feature |
| 1546 | /// (C++ [class.union]) and a GNU C extension; anonymous structures |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1547 | /// are a GNU C and GNU C++ extension. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1548 | Sema::DeclPtrTy Sema::BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, |
| 1549 | RecordDecl *Record) { |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1550 | DeclContext *Owner = Record->getDeclContext(); |
| 1551 | |
| 1552 | // Diagnose whether this anonymous struct/union is an extension. |
| 1553 | if (Record->isUnion() && !getLangOptions().CPlusPlus) |
| 1554 | Diag(Record->getLocation(), diag::ext_anonymous_union); |
| 1555 | else if (!Record->isUnion()) |
| 1556 | Diag(Record->getLocation(), diag::ext_anonymous_struct); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1557 | |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1558 | // C and C++ require different kinds of checks for anonymous |
| 1559 | // structs/unions. |
| 1560 | bool Invalid = false; |
| 1561 | if (getLangOptions().CPlusPlus) { |
| 1562 | const char* PrevSpec = 0; |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 1563 | unsigned DiagID; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1564 | // C++ [class.union]p3: |
| 1565 | // Anonymous unions declared in a named namespace or in the |
| 1566 | // global namespace shall be declared static. |
| 1567 | if (DS.getStorageClassSpec() != DeclSpec::SCS_static && |
| 1568 | (isa<TranslationUnitDecl>(Owner) || |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1569 | (isa<NamespaceDecl>(Owner) && |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1570 | cast<NamespaceDecl>(Owner)->getDeclName()))) { |
| 1571 | Diag(Record->getLocation(), diag::err_anonymous_union_not_static); |
| 1572 | Invalid = true; |
| 1573 | |
| 1574 | // Recover by adding 'static'. |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 1575 | DS.SetStorageClassSpec(DeclSpec::SCS_static, SourceLocation(), |
| 1576 | PrevSpec, DiagID); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1577 | } |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1578 | // C++ [class.union]p3: |
| 1579 | // A storage class is not allowed in a declaration of an |
| 1580 | // anonymous union in a class scope. |
| 1581 | else if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified && |
| 1582 | isa<RecordDecl>(Owner)) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1583 | Diag(DS.getStorageClassSpecLoc(), |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1584 | diag::err_anonymous_union_with_storage_spec); |
| 1585 | Invalid = true; |
| 1586 | |
| 1587 | // Recover by removing the storage specifier. |
| 1588 | DS.SetStorageClassSpec(DeclSpec::SCS_unspecified, SourceLocation(), |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 1589 | PrevSpec, DiagID); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1590 | } |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 1591 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1592 | // C++ [class.union]p2: |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 1593 | // The member-specification of an anonymous union shall only |
| 1594 | // define non-static data members. [Note: nested types and |
| 1595 | // functions cannot be declared within an anonymous union. ] |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1596 | for (DeclContext::decl_iterator Mem = Record->decls_begin(), |
| 1597 | MemEnd = Record->decls_end(); |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 1598 | Mem != MemEnd; ++Mem) { |
| 1599 | if (FieldDecl *FD = dyn_cast<FieldDecl>(*Mem)) { |
| 1600 | // C++ [class.union]p3: |
| 1601 | // An anonymous union shall not have private or protected |
| 1602 | // members (clause 11). |
| 1603 | if (FD->getAccess() == AS_protected || FD->getAccess() == AS_private) { |
| 1604 | Diag(FD->getLocation(), diag::err_anonymous_record_nonpublic_member) |
| 1605 | << (int)Record->isUnion() << (int)(FD->getAccess() == AS_protected); |
| 1606 | Invalid = true; |
| 1607 | } |
| 1608 | } else if ((*Mem)->isImplicit()) { |
| 1609 | // Any implicit members are fine. |
Douglas Gregor | 1931b44 | 2009-02-03 00:34:39 +0000 | [diff] [blame] | 1610 | } else if (isa<TagDecl>(*Mem) && (*Mem)->getDeclContext() != Record) { |
| 1611 | // This is a type that showed up in an |
| 1612 | // elaborated-type-specifier inside the anonymous struct or |
| 1613 | // union, but which actually declares a type outside of the |
| 1614 | // anonymous struct or union. It's okay. |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 1615 | } else if (RecordDecl *MemRecord = dyn_cast<RecordDecl>(*Mem)) { |
| 1616 | if (!MemRecord->isAnonymousStructOrUnion() && |
| 1617 | MemRecord->getDeclName()) { |
| 1618 | // This is a nested type declaration. |
| 1619 | Diag(MemRecord->getLocation(), diag::err_anonymous_record_with_type) |
| 1620 | << (int)Record->isUnion(); |
| 1621 | Invalid = true; |
| 1622 | } |
| 1623 | } else { |
| 1624 | // We have something that isn't a non-static data |
| 1625 | // member. Complain about it. |
| 1626 | unsigned DK = diag::err_anonymous_record_bad_member; |
| 1627 | if (isa<TypeDecl>(*Mem)) |
| 1628 | DK = diag::err_anonymous_record_with_type; |
| 1629 | else if (isa<FunctionDecl>(*Mem)) |
| 1630 | DK = diag::err_anonymous_record_with_function; |
| 1631 | else if (isa<VarDecl>(*Mem)) |
| 1632 | DK = diag::err_anonymous_record_with_static; |
| 1633 | Diag((*Mem)->getLocation(), DK) |
| 1634 | << (int)Record->isUnion(); |
| 1635 | Invalid = true; |
| 1636 | } |
| 1637 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1638 | } |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1639 | |
| 1640 | if (!Record->isUnion() && !Owner->isRecord()) { |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 1641 | Diag(Record->getLocation(), diag::err_anonymous_struct_not_member) |
| 1642 | << (int)getLangOptions().CPlusPlus; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1643 | Invalid = true; |
| 1644 | } |
| 1645 | |
John McCall | eb692e0 | 2009-10-22 23:31:08 +0000 | [diff] [blame] | 1646 | // Mock up a declarator. |
| 1647 | Declarator Dc(DS, Declarator::TypeNameContext); |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 1648 | TypeSourceInfo *TInfo = 0; |
| 1649 | GetTypeForDeclarator(Dc, S, &TInfo); |
| 1650 | assert(TInfo && "couldn't build declarator info for anonymous struct/union"); |
John McCall | eb692e0 | 2009-10-22 23:31:08 +0000 | [diff] [blame] | 1651 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1652 | // Create a declaration for this anonymous struct/union. |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 1653 | NamedDecl *Anon = 0; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1654 | if (RecordDecl *OwningClass = dyn_cast<RecordDecl>(Owner)) { |
| 1655 | Anon = FieldDecl::Create(Context, OwningClass, Record->getLocation(), |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1656 | /*IdentifierInfo=*/0, |
Argyrios Kyrtzidis | a5d8200 | 2009-08-21 00:31:54 +0000 | [diff] [blame] | 1657 | Context.getTypeDeclType(Record), |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 1658 | TInfo, |
Argyrios Kyrtzidis | a5d8200 | 2009-08-21 00:31:54 +0000 | [diff] [blame] | 1659 | /*BitWidth=*/0, /*Mutable=*/false); |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 1660 | Anon->setAccess(AS_public); |
| 1661 | if (getLangOptions().CPlusPlus) |
| 1662 | FieldCollector->Add(cast<FieldDecl>(Anon)); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1663 | } else { |
| 1664 | VarDecl::StorageClass SC; |
| 1665 | switch (DS.getStorageClassSpec()) { |
| 1666 | default: assert(0 && "Unknown storage class!"); |
| 1667 | case DeclSpec::SCS_unspecified: SC = VarDecl::None; break; |
| 1668 | case DeclSpec::SCS_extern: SC = VarDecl::Extern; break; |
| 1669 | case DeclSpec::SCS_static: SC = VarDecl::Static; break; |
| 1670 | case DeclSpec::SCS_auto: SC = VarDecl::Auto; break; |
| 1671 | case DeclSpec::SCS_register: SC = VarDecl::Register; break; |
| 1672 | case DeclSpec::SCS_private_extern: SC = VarDecl::PrivateExtern; break; |
| 1673 | case DeclSpec::SCS_mutable: |
| 1674 | // mutable can only appear on non-static class members, so it's always |
| 1675 | // an error here |
| 1676 | Diag(Record->getLocation(), diag::err_mutable_nonmember); |
| 1677 | Invalid = true; |
| 1678 | SC = VarDecl::None; |
| 1679 | break; |
| 1680 | } |
| 1681 | |
| 1682 | Anon = VarDecl::Create(Context, Owner, Record->getLocation(), |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1683 | /*IdentifierInfo=*/0, |
Argyrios Kyrtzidis | a5d8200 | 2009-08-21 00:31:54 +0000 | [diff] [blame] | 1684 | Context.getTypeDeclType(Record), |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 1685 | TInfo, |
Argyrios Kyrtzidis | a5d8200 | 2009-08-21 00:31:54 +0000 | [diff] [blame] | 1686 | SC); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1687 | } |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 1688 | Anon->setImplicit(); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1689 | |
| 1690 | // Add the anonymous struct/union object to the current |
| 1691 | // context. We'll be referencing this object when we refer to one of |
| 1692 | // its members. |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1693 | Owner->addDecl(Anon); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1694 | |
| 1695 | // Inject the members of the anonymous struct/union into the owning |
| 1696 | // context and into the identifier resolver chain for name lookup |
| 1697 | // purposes. |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 1698 | if (InjectAnonymousStructOrUnionMembers(S, Owner, Record)) |
| 1699 | Invalid = true; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1700 | |
| 1701 | // Mark this as an anonymous struct/union type. Note that we do not |
| 1702 | // do this until after we have already checked and injected the |
| 1703 | // members of this anonymous struct/union type, because otherwise |
| 1704 | // the members could be injected twice: once by DeclContext when it |
| 1705 | // builds its lookup table, and once by |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1706 | // InjectAnonymousStructOrUnionMembers. |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1707 | Record->setAnonymousStructOrUnion(true); |
| 1708 | |
| 1709 | if (Invalid) |
| 1710 | Anon->setInvalidDecl(); |
| 1711 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1712 | return DeclPtrTy::make(Anon); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1713 | } |
| 1714 | |
Steve Naroff | f009063 | 2007-09-02 02:04:30 +0000 | [diff] [blame] | 1715 | |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 1716 | /// GetNameForDeclarator - Determine the full declaration name for the |
| 1717 | /// given Declarator. |
| 1718 | DeclarationName Sema::GetNameForDeclarator(Declarator &D) { |
Douglas Gregor | 02a24ee | 2009-11-03 16:56:39 +0000 | [diff] [blame] | 1719 | return GetNameFromUnqualifiedId(D.getName()); |
| 1720 | } |
| 1721 | |
| 1722 | /// \brief Retrieves the canonicalized name from a parsed unqualified-id. |
John McCall | 129e2df | 2009-11-30 22:42:35 +0000 | [diff] [blame] | 1723 | DeclarationName Sema::GetNameFromUnqualifiedId(const UnqualifiedId &Name) { |
Douglas Gregor | 3f9a056 | 2009-11-03 01:35:08 +0000 | [diff] [blame] | 1724 | switch (Name.getKind()) { |
Douglas Gregor | 02a24ee | 2009-11-03 16:56:39 +0000 | [diff] [blame] | 1725 | case UnqualifiedId::IK_Identifier: |
| 1726 | return DeclarationName(Name.Identifier); |
Douglas Gregor | 3f9a056 | 2009-11-03 01:35:08 +0000 | [diff] [blame] | 1727 | |
Douglas Gregor | 02a24ee | 2009-11-03 16:56:39 +0000 | [diff] [blame] | 1728 | case UnqualifiedId::IK_OperatorFunctionId: |
| 1729 | return Context.DeclarationNames.getCXXOperatorName( |
Sean Hunt | f4fdd9b | 2009-11-29 03:04:53 +0000 | [diff] [blame] | 1730 | Name.OperatorFunctionId.Operator); |
Sean Hunt | 0486d74 | 2009-11-28 04:44:28 +0000 | [diff] [blame] | 1731 | |
| 1732 | case UnqualifiedId::IK_LiteralOperatorId: |
Sean Hunt | 3e518bd | 2009-11-29 07:34:05 +0000 | [diff] [blame] | 1733 | return Context.DeclarationNames.getCXXLiteralOperatorName( |
| 1734 | Name.Identifier); |
Sean Hunt | 0486d74 | 2009-11-28 04:44:28 +0000 | [diff] [blame] | 1735 | |
Douglas Gregor | 02a24ee | 2009-11-03 16:56:39 +0000 | [diff] [blame] | 1736 | case UnqualifiedId::IK_ConversionFunctionId: { |
| 1737 | QualType Ty = GetTypeFromParser(Name.ConversionFunctionId); |
| 1738 | if (Ty.isNull()) |
| 1739 | return DeclarationName(); |
Douglas Gregor | db422df | 2009-09-25 21:45:23 +0000 | [diff] [blame] | 1740 | |
Douglas Gregor | 02a24ee | 2009-11-03 16:56:39 +0000 | [diff] [blame] | 1741 | return Context.DeclarationNames.getCXXConversionFunctionName( |
Sean Hunt | f4fdd9b | 2009-11-29 03:04:53 +0000 | [diff] [blame] | 1742 | Context.getCanonicalType(Ty)); |
Douglas Gregor | 02a24ee | 2009-11-03 16:56:39 +0000 | [diff] [blame] | 1743 | } |
| 1744 | |
| 1745 | case UnqualifiedId::IK_ConstructorName: { |
| 1746 | QualType Ty = GetTypeFromParser(Name.ConstructorName); |
| 1747 | if (Ty.isNull()) |
| 1748 | return DeclarationName(); |
| 1749 | |
| 1750 | return Context.DeclarationNames.getCXXConstructorName( |
Sean Hunt | f4fdd9b | 2009-11-29 03:04:53 +0000 | [diff] [blame] | 1751 | Context.getCanonicalType(Ty)); |
Douglas Gregor | 02a24ee | 2009-11-03 16:56:39 +0000 | [diff] [blame] | 1752 | } |
| 1753 | |
Douglas Gregor | 0efc2c1 | 2010-01-13 17:31:36 +0000 | [diff] [blame] | 1754 | case UnqualifiedId::IK_ConstructorTemplateId: { |
| 1755 | // In well-formed code, we can only have a constructor |
| 1756 | // template-id that refers to the current context, so go there |
| 1757 | // to find the actual type being constructed. |
| 1758 | CXXRecordDecl *CurClass = dyn_cast<CXXRecordDecl>(CurContext); |
| 1759 | if (!CurClass || CurClass->getIdentifier() != Name.TemplateId->Name) |
| 1760 | return DeclarationName(); |
| 1761 | |
| 1762 | // Determine the type of the class being constructed. |
John McCall | 3cb0ebd | 2010-03-10 03:28:59 +0000 | [diff] [blame] | 1763 | QualType CurClassType = Context.getTypeDeclType(CurClass); |
Douglas Gregor | 0efc2c1 | 2010-01-13 17:31:36 +0000 | [diff] [blame] | 1764 | |
| 1765 | // FIXME: Check two things: that the template-id names the same type as |
| 1766 | // CurClassType, and that the template-id does not occur when the name |
| 1767 | // was qualified. |
| 1768 | |
| 1769 | return Context.DeclarationNames.getCXXConstructorName( |
| 1770 | Context.getCanonicalType(CurClassType)); |
| 1771 | } |
| 1772 | |
Douglas Gregor | 02a24ee | 2009-11-03 16:56:39 +0000 | [diff] [blame] | 1773 | case UnqualifiedId::IK_DestructorName: { |
| 1774 | QualType Ty = GetTypeFromParser(Name.DestructorName); |
| 1775 | if (Ty.isNull()) |
| 1776 | return DeclarationName(); |
| 1777 | |
| 1778 | return Context.DeclarationNames.getCXXDestructorName( |
| 1779 | Context.getCanonicalType(Ty)); |
| 1780 | } |
| 1781 | |
| 1782 | case UnqualifiedId::IK_TemplateId: { |
| 1783 | TemplateName TName |
John McCall | 0bd6feb | 2009-12-02 08:04:21 +0000 | [diff] [blame] | 1784 | = TemplateName::getFromVoidPointer(Name.TemplateId->Template); |
| 1785 | return Context.getNameForTemplate(TName); |
Douglas Gregor | 02a24ee | 2009-11-03 16:56:39 +0000 | [diff] [blame] | 1786 | } |
Douglas Gregor | db422df | 2009-09-25 21:45:23 +0000 | [diff] [blame] | 1787 | } |
Douglas Gregor | 02a24ee | 2009-11-03 16:56:39 +0000 | [diff] [blame] | 1788 | |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 1789 | assert(false && "Unknown name kind"); |
Douglas Gregor | 02a24ee | 2009-11-03 16:56:39 +0000 | [diff] [blame] | 1790 | return DeclarationName(); |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 1791 | } |
| 1792 | |
Douglas Gregor | 4ce205f | 2009-02-06 17:46:57 +0000 | [diff] [blame] | 1793 | /// isNearlyMatchingFunction - Determine whether the C++ functions |
| 1794 | /// Declaration and Definition are "nearly" matching. This heuristic |
| 1795 | /// is used to improve diagnostics in the case where an out-of-line |
| 1796 | /// function definition doesn't match any declaration within |
| 1797 | /// the class or namespace. |
| 1798 | static bool isNearlyMatchingFunction(ASTContext &Context, |
| 1799 | FunctionDecl *Declaration, |
| 1800 | FunctionDecl *Definition) { |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 1801 | if (Declaration->param_size() != Definition->param_size()) |
| 1802 | return false; |
| 1803 | for (unsigned Idx = 0; Idx < Declaration->param_size(); ++Idx) { |
| 1804 | QualType DeclParamTy = Declaration->getParamDecl(Idx)->getType(); |
| 1805 | QualType DefParamTy = Definition->getParamDecl(Idx)->getType(); |
| 1806 | |
Douglas Gregor | a4923eb | 2009-11-16 21:35:15 +0000 | [diff] [blame] | 1807 | if (!Context.hasSameUnqualifiedType(DeclParamTy.getNonReferenceType(), |
| 1808 | DefParamTy.getNonReferenceType())) |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 1809 | return false; |
| 1810 | } |
| 1811 | |
| 1812 | return true; |
| 1813 | } |
| 1814 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1815 | Sema::DeclPtrTy |
| 1816 | Sema::HandleDeclarator(Scope *S, Declarator &D, |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 1817 | MultiTemplateParamsArg TemplateParamLists, |
| 1818 | bool IsFunctionDefinition) { |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 1819 | DeclarationName Name = GetNameForDeclarator(D); |
| 1820 | |
Chris Lattner | e80a59c | 2007-07-25 00:24:17 +0000 | [diff] [blame] | 1821 | // All of these full declarators require an identifier. If it doesn't have |
| 1822 | // one, the ParsedFreeStandingDeclSpec action should be used. |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 1823 | if (!Name) { |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1824 | if (!D.isInvalidType()) // Reject this if we think it is valid. |
Chris Lattner | 1f6f54b | 2008-11-11 06:13:16 +0000 | [diff] [blame] | 1825 | Diag(D.getDeclSpec().getSourceRange().getBegin(), |
Chris Lattner | fa25bbb | 2008-11-19 05:08:23 +0000 | [diff] [blame] | 1826 | diag::err_declarator_need_ident) |
| 1827 | << D.getDeclSpec().getSourceRange() << D.getSourceRange(); |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1828 | return DeclPtrTy(); |
Chris Lattner | e80a59c | 2007-07-25 00:24:17 +0000 | [diff] [blame] | 1829 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1830 | |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 1831 | // The scope passed in may not be a decl scope. Zip up the scope tree until |
| 1832 | // we find one that is. |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 1833 | while ((S->getFlags() & Scope::DeclScope) == 0 || |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 1834 | (S->getFlags() & Scope::TemplateParamScope) != 0) |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 1835 | S = S->getParent(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1836 | |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 1837 | // If this is an out-of-line definition of a member of a class template |
| 1838 | // or class template partial specialization, we may need to rebuild the |
| 1839 | // type specifier in the declarator. See RebuildTypeInCurrentInstantiation() |
| 1840 | // for more information. |
| 1841 | // FIXME: cope with decltype(expr) and typeof(expr) once the rebuilder can |
| 1842 | // handle expressions properly. |
| 1843 | DeclSpec &DS = const_cast<DeclSpec&>(D.getDeclSpec()); |
| 1844 | if (D.getCXXScopeSpec().isSet() && !D.getCXXScopeSpec().isInvalid() && |
| 1845 | isDependentScopeSpecifier(D.getCXXScopeSpec()) && |
| 1846 | (DS.getTypeSpecType() == DeclSpec::TST_typename || |
| 1847 | DS.getTypeSpecType() == DeclSpec::TST_typeofType || |
| 1848 | DS.getTypeSpecType() == DeclSpec::TST_typeofExpr || |
| 1849 | DS.getTypeSpecType() == DeclSpec::TST_decltype)) { |
| 1850 | if (DeclContext *DC = computeDeclContext(D.getCXXScopeSpec(), true)) { |
Argyrios Kyrtzidis | e866190 | 2009-08-19 01:28:28 +0000 | [diff] [blame] | 1851 | // FIXME: Preserve type source info. |
| 1852 | QualType T = GetTypeFromParser(DS.getTypeRep()); |
John McCall | 0dd7ceb | 2009-12-19 09:35:56 +0000 | [diff] [blame] | 1853 | |
| 1854 | DeclContext *SavedContext = CurContext; |
| 1855 | CurContext = DC; |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 1856 | T = RebuildTypeInCurrentInstantiation(T, D.getIdentifierLoc(), Name); |
John McCall | 0dd7ceb | 2009-12-19 09:35:56 +0000 | [diff] [blame] | 1857 | CurContext = SavedContext; |
| 1858 | |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 1859 | if (T.isNull()) |
| 1860 | return DeclPtrTy(); |
| 1861 | DS.UpdateTypeRep(T.getAsOpaquePtr()); |
| 1862 | } |
| 1863 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1864 | |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 1865 | DeclContext *DC; |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 1866 | NamedDecl *New; |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1867 | |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 1868 | TypeSourceInfo *TInfo = 0; |
| 1869 | QualType R = GetTypeForDeclarator(D, S, &TInfo); |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 1870 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1871 | LookupResult Previous(*this, Name, D.getIdentifierLoc(), LookupOrdinaryName, |
| 1872 | ForRedeclaration); |
| 1873 | |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 1874 | // See if this is a redefinition of a variable in the same scope. |
Douglas Gregor | 9fa14a5 | 2009-03-06 19:06:37 +0000 | [diff] [blame] | 1875 | if (D.getCXXScopeSpec().isInvalid()) { |
| 1876 | DC = CurContext; |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1877 | D.setInvalidType(); |
Douglas Gregor | 9fa14a5 | 2009-03-06 19:06:37 +0000 | [diff] [blame] | 1878 | } else if (!D.getCXXScopeSpec().isSet()) { |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1879 | bool IsLinkageLookup = false; |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 1880 | |
| 1881 | // If the declaration we're planning to build will be a function |
| 1882 | // or object with linkage, then look for another declaration with |
| 1883 | // linkage (C99 6.2.2p4-5 and C++ [basic.link]p6). |
| 1884 | if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) |
| 1885 | /* Do nothing*/; |
| 1886 | else if (R->isFunctionType()) { |
Douglas Gregor | 6bec78d | 2009-07-07 17:00:05 +0000 | [diff] [blame] | 1887 | if (CurContext->isFunctionOrMethod() || |
| 1888 | D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_static) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1889 | IsLinkageLookup = true; |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 1890 | } else if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_extern) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1891 | IsLinkageLookup = true; |
Douglas Gregor | 6bec78d | 2009-07-07 17:00:05 +0000 | [diff] [blame] | 1892 | else if (CurContext->getLookupContext()->isTranslationUnit() && |
| 1893 | D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_static) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1894 | IsLinkageLookup = true; |
| 1895 | |
| 1896 | if (IsLinkageLookup) |
| 1897 | Previous.clear(LookupRedeclarationWithLinkage); |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 1898 | |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 1899 | DC = CurContext; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1900 | LookupName(Previous, S, /* CreateBuiltins = */ IsLinkageLookup); |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 1901 | } else { // Something like "int foo::x;" |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 1902 | DC = computeDeclContext(D.getCXXScopeSpec(), true); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1903 | |
Douglas Gregor | dacd434 | 2009-08-26 00:04:55 +0000 | [diff] [blame] | 1904 | if (!DC) { |
| 1905 | // If we could not compute the declaration context, it's because the |
| 1906 | // declaration context is dependent but does not refer to a class, |
| 1907 | // class template, or class template partial specialization. Complain |
| 1908 | // and return early, to avoid the coming semantic disaster. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1909 | Diag(D.getIdentifierLoc(), |
Douglas Gregor | dacd434 | 2009-08-26 00:04:55 +0000 | [diff] [blame] | 1910 | diag::err_template_qualified_declarator_no_match) |
| 1911 | << (NestedNameSpecifier*)D.getCXXScopeSpec().getScopeRep() |
| 1912 | << D.getCXXScopeSpec().getRange(); |
| 1913 | return DeclPtrTy(); |
| 1914 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1915 | |
Douglas Gregor | fd056bc | 2009-10-13 16:30:37 +0000 | [diff] [blame] | 1916 | if (!DC->isDependentContext() && |
| 1917 | RequireCompleteDeclContext(D.getCXXScopeSpec())) |
| 1918 | return DeclPtrTy(); |
John McCall | 86ff308 | 2010-02-04 22:26:26 +0000 | [diff] [blame] | 1919 | |
| 1920 | if (isa<CXXRecordDecl>(DC) && !cast<CXXRecordDecl>(DC)->hasDefinition()) { |
| 1921 | Diag(D.getIdentifierLoc(), |
| 1922 | diag::err_member_def_undefined_record) |
| 1923 | << Name << DC << D.getCXXScopeSpec().getRange(); |
| 1924 | D.setInvalidType(); |
| 1925 | } |
Douglas Gregor | fd056bc | 2009-10-13 16:30:37 +0000 | [diff] [blame] | 1926 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1927 | LookupQualifiedName(Previous, DC); |
| 1928 | |
| 1929 | // Don't consider using declarations as previous declarations for |
| 1930 | // out-of-line members. |
| 1931 | RemoveUsingDecls(Previous); |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 1932 | |
| 1933 | // C++ 7.3.1.2p2: |
| 1934 | // Members (including explicit specializations of templates) of a named |
| 1935 | // namespace can also be defined outside that namespace by explicit |
| 1936 | // qualification of the name being defined, provided that the entity being |
| 1937 | // defined was already declared in the namespace and the definition appears |
| 1938 | // after the point of declaration in a namespace that encloses the |
| 1939 | // declarations namespace. |
| 1940 | // |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 1941 | // Note that we only check the context at this point. We don't yet |
| 1942 | // have enough information to make sure that PrevDecl is actually |
| 1943 | // the declaration we want to match. For example, given: |
| 1944 | // |
Douglas Gregor | 9d35097 | 2008-12-12 08:25:50 +0000 | [diff] [blame] | 1945 | // class X { |
| 1946 | // void f(); |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 1947 | // void f(float); |
Douglas Gregor | 9d35097 | 2008-12-12 08:25:50 +0000 | [diff] [blame] | 1948 | // }; |
| 1949 | // |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 1950 | // void X::f(int) { } // ill-formed |
| 1951 | // |
| 1952 | // In this case, PrevDecl will point to the overload set |
| 1953 | // containing the two f's declared in X, but neither of them |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1954 | // matches. |
Douglas Gregor | 4ce205f | 2009-02-06 17:46:57 +0000 | [diff] [blame] | 1955 | |
| 1956 | // First check whether we named the global scope. |
| 1957 | if (isa<TranslationUnitDecl>(DC)) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1958 | Diag(D.getIdentifierLoc(), diag::err_invalid_declarator_global_scope) |
Douglas Gregor | 4ce205f | 2009-02-06 17:46:57 +0000 | [diff] [blame] | 1959 | << Name << D.getCXXScopeSpec().getRange(); |
Sebastian Redl | 9770ef0 | 2009-11-08 11:36:54 +0000 | [diff] [blame] | 1960 | } else { |
| 1961 | DeclContext *Cur = CurContext; |
| 1962 | while (isa<LinkageSpecDecl>(Cur)) |
| 1963 | Cur = Cur->getParent(); |
| 1964 | if (!Cur->Encloses(DC)) { |
| 1965 | // The qualifying scope doesn't enclose the original declaration. |
| 1966 | // Emit diagnostic based on current scope. |
| 1967 | SourceLocation L = D.getIdentifierLoc(); |
| 1968 | SourceRange R = D.getCXXScopeSpec().getRange(); |
| 1969 | if (isa<FunctionDecl>(Cur)) |
| 1970 | Diag(L, diag::err_invalid_declarator_in_function) << Name << R; |
| 1971 | else |
| 1972 | Diag(L, diag::err_invalid_declarator_scope) |
| 1973 | << Name << cast<NamedDecl>(DC) << R; |
| 1974 | D.setInvalidType(); |
| 1975 | } |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 1976 | } |
| 1977 | } |
| 1978 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1979 | if (Previous.isSingleResult() && |
| 1980 | Previous.getFoundDecl()->isTemplateParameter()) { |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 1981 | // Maybe we will complain about the shadowed template parameter. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1982 | if (!D.isInvalidType()) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1983 | if (DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), |
| 1984 | Previous.getFoundDecl())) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1985 | D.setInvalidType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1986 | |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 1987 | // Just pretend that we didn't see the previous declaration. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1988 | Previous.clear(); |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 1989 | } |
| 1990 | |
Douglas Gregor | 2ce52f3 | 2008-04-13 21:07:44 +0000 | [diff] [blame] | 1991 | // In C++, the previous declaration we find might be a tag type |
| 1992 | // (class or enum). In this case, the new declaration will hide the |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 1993 | // tag type. Note that this does does not apply if we're declaring a |
| 1994 | // typedef (C++ [dcl.typedef]p4). |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1995 | if (Previous.isSingleTagDecl() && |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 1996 | D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 1997 | Previous.clear(); |
Douglas Gregor | 2ce52f3 | 2008-04-13 21:07:44 +0000 | [diff] [blame] | 1998 | |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1999 | bool Redeclaration = false; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 2000 | if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) { |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 2001 | if (TemplateParamLists.size()) { |
| 2002 | Diag(D.getIdentifierLoc(), diag::err_template_typedef); |
| 2003 | return DeclPtrTy(); |
| 2004 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2005 | |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2006 | New = ActOnTypedefDeclarator(S, D, DC, R, TInfo, Previous, Redeclaration); |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 2007 | } else if (R->isFunctionType()) { |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2008 | New = ActOnFunctionDeclarator(S, D, DC, R, TInfo, Previous, |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 2009 | move(TemplateParamLists), |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2010 | IsFunctionDefinition, Redeclaration); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 2011 | } else { |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2012 | New = ActOnVariableDeclarator(S, D, DC, R, TInfo, Previous, |
Douglas Gregor | dfe3f2d | 2009-07-22 17:18:37 +0000 | [diff] [blame] | 2013 | move(TemplateParamLists), |
| 2014 | Redeclaration); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 2015 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2016 | |
| 2017 | if (New == 0) |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 2018 | return DeclPtrTy(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2019 | |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 2020 | // If this has an identifier and is not an invalid redeclaration or |
| 2021 | // function template specialization, add it to the scope stack. |
Eli Friedman | 6bc2013 | 2009-12-08 05:40:03 +0000 | [diff] [blame] | 2022 | if (Name && !(Redeclaration && New->isInvalidDecl())) |
Argyrios Kyrtzidis | 87f3ff0 | 2008-04-12 00:47:19 +0000 | [diff] [blame] | 2023 | PushOnScopeChains(New, S); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2024 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 2025 | return DeclPtrTy::make(New); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 2026 | } |
| 2027 | |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2028 | /// TryToFixInvalidVariablyModifiedType - Helper method to turn variable array |
| 2029 | /// types into constant array types in certain situations which would otherwise |
| 2030 | /// be errors (for GCC compatibility). |
| 2031 | static QualType TryToFixInvalidVariablyModifiedType(QualType T, |
| 2032 | ASTContext &Context, |
| 2033 | bool &SizeIsNegative) { |
| 2034 | // This method tries to turn a variable array into a constant |
| 2035 | // array even when the size isn't an ICE. This is necessary |
| 2036 | // for compatibility with code that depends on gcc's buggy |
| 2037 | // constant expression folding, like struct {char x[(int)(char*)2];} |
| 2038 | SizeIsNegative = false; |
| 2039 | |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 2040 | QualifierCollector Qs; |
| 2041 | const Type *Ty = Qs.strip(T); |
| 2042 | |
| 2043 | if (const PointerType* PTy = dyn_cast<PointerType>(Ty)) { |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2044 | QualType Pointee = PTy->getPointeeType(); |
| 2045 | QualType FixedType = |
| 2046 | TryToFixInvalidVariablyModifiedType(Pointee, Context, SizeIsNegative); |
| 2047 | if (FixedType.isNull()) return FixedType; |
Eli Friedman | 61125c8 | 2009-02-21 00:58:02 +0000 | [diff] [blame] | 2048 | FixedType = Context.getPointerType(FixedType); |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 2049 | return Qs.apply(FixedType); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2050 | } |
| 2051 | |
| 2052 | const VariableArrayType* VLATy = dyn_cast<VariableArrayType>(T); |
Eli Friedman | bc592e6 | 2009-02-26 03:58:54 +0000 | [diff] [blame] | 2053 | if (!VLATy) |
| 2054 | return QualType(); |
| 2055 | // FIXME: We should probably handle this case |
| 2056 | if (VLATy->getElementType()->isVariablyModifiedType()) |
| 2057 | return QualType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2058 | |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2059 | Expr::EvalResult EvalResult; |
| 2060 | if (!VLATy->getSizeExpr() || |
Eli Friedman | bc592e6 | 2009-02-26 03:58:54 +0000 | [diff] [blame] | 2061 | !VLATy->getSizeExpr()->Evaluate(EvalResult, Context) || |
| 2062 | !EvalResult.Val.isInt()) |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2063 | return QualType(); |
Eli Friedman | bc592e6 | 2009-02-26 03:58:54 +0000 | [diff] [blame] | 2064 | |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2065 | llvm::APSInt &Res = EvalResult.Val.getInt(); |
Douglas Gregor | 7e7eb3d | 2009-07-06 15:59:29 +0000 | [diff] [blame] | 2066 | if (Res >= llvm::APSInt(Res.getBitWidth(), Res.isUnsigned())) { |
John McCall | 46a617a | 2009-10-16 00:14:28 +0000 | [diff] [blame] | 2067 | // TODO: preserve the size expression in declarator info |
| 2068 | return Context.getConstantArrayType(VLATy->getElementType(), |
| 2069 | Res, ArrayType::Normal, 0); |
Douglas Gregor | 7e7eb3d | 2009-07-06 15:59:29 +0000 | [diff] [blame] | 2070 | } |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2071 | |
| 2072 | SizeIsNegative = true; |
| 2073 | return QualType(); |
| 2074 | } |
| 2075 | |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 2076 | /// \brief Register the given locally-scoped external C declaration so |
| 2077 | /// that it can be found later for redeclarations |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2078 | void |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2079 | Sema::RegisterLocallyScopedExternCDecl(NamedDecl *ND, |
| 2080 | const LookupResult &Previous, |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 2081 | Scope *S) { |
| 2082 | assert(ND->getLexicalDeclContext()->isFunctionOrMethod() && |
| 2083 | "Decl is not a locally-scoped decl!"); |
| 2084 | // Note that we have a locally-scoped external with this name. |
| 2085 | LocallyScopedExternalDecls[ND->getDeclName()] = ND; |
| 2086 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2087 | if (!Previous.isSingleResult()) |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 2088 | return; |
| 2089 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2090 | NamedDecl *PrevDecl = Previous.getFoundDecl(); |
| 2091 | |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 2092 | // If there was a previous declaration of this variable, it may be |
| 2093 | // in our identifier chain. Update the identifier chain with the new |
| 2094 | // declaration. |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2095 | if (S && IdResolver.ReplaceDecl(PrevDecl, ND)) { |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 2096 | // The previous declaration was found on the identifer resolver |
| 2097 | // chain, so remove it from its scope. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 2098 | while (S && !S->isDeclScope(DeclPtrTy::make(PrevDecl))) |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 2099 | S = S->getParent(); |
| 2100 | |
| 2101 | if (S) |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 2102 | S->RemoveDecl(DeclPtrTy::make(PrevDecl)); |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 2103 | } |
| 2104 | } |
| 2105 | |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 2106 | /// \brief Diagnose function specifiers on a declaration of an identifier that |
| 2107 | /// does not identify a function. |
| 2108 | void Sema::DiagnoseFunctionSpecifiers(Declarator& D) { |
| 2109 | // FIXME: We should probably indicate the identifier in question to avoid |
| 2110 | // confusion for constructs like "inline int a(), b;" |
| 2111 | if (D.getDeclSpec().isInlineSpecified()) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2112 | Diag(D.getDeclSpec().getInlineSpecLoc(), |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 2113 | diag::err_inline_non_function); |
| 2114 | |
| 2115 | if (D.getDeclSpec().isVirtualSpecified()) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2116 | Diag(D.getDeclSpec().getVirtualSpecLoc(), |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 2117 | diag::err_virtual_non_function); |
| 2118 | |
| 2119 | if (D.getDeclSpec().isExplicitSpecified()) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2120 | Diag(D.getDeclSpec().getExplicitSpecLoc(), |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 2121 | diag::err_explicit_non_function); |
| 2122 | } |
| 2123 | |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 2124 | NamedDecl* |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 2125 | Sema::ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2126 | QualType R, TypeSourceInfo *TInfo, |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2127 | LookupResult &Previous, bool &Redeclaration) { |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 2128 | // Typedef declarators cannot be qualified (C++ [dcl.meaning]p1). |
| 2129 | if (D.getCXXScopeSpec().isSet()) { |
| 2130 | Diag(D.getIdentifierLoc(), diag::err_qualified_typedef_declarator) |
| 2131 | << D.getCXXScopeSpec().getRange(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2132 | D.setInvalidType(); |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 2133 | // Pretend we didn't see the scope specifier. |
Douglas Gregor | 9de672f | 2010-03-23 15:26:55 +0000 | [diff] [blame] | 2134 | DC = CurContext; |
| 2135 | Previous.clear(); |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 2136 | } |
| 2137 | |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2138 | if (getLangOptions().CPlusPlus) { |
| 2139 | // Check that there are no default arguments (C++ only). |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 2140 | CheckExtraCXXDefaultArguments(D); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2141 | } |
| 2142 | |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 2143 | DiagnoseFunctionSpecifiers(D); |
| 2144 | |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 2145 | if (D.getDeclSpec().isThreadSpecified()) |
| 2146 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_invalid_thread); |
| 2147 | |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2148 | TypedefDecl *NewTD = ParseTypedefDecl(S, D, R, TInfo); |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 2149 | if (!NewTD) return 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2150 | |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 2151 | // Handle attributes prior to checking for duplicates in MergeVarDecl |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 2152 | ProcessDeclAttributes(S, NewTD, D); |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2153 | |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 2154 | // Merge the decl with the existing one if appropriate. If the decl is |
| 2155 | // in an outer scope, it isn't the same thing. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2156 | FilterLookupForScope(*this, Previous, DC, S, /*ConsiderLinkage*/ false); |
| 2157 | if (!Previous.empty()) { |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 2158 | Redeclaration = true; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2159 | MergeTypeDefDecl(NewTD, Previous); |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 2160 | } |
| 2161 | |
Chris Lattner | 38c5ebd | 2009-04-19 05:21:20 +0000 | [diff] [blame] | 2162 | // C99 6.7.7p2: If a typedef name specifies a variably modified type |
| 2163 | // then it shall have block scope. |
| 2164 | QualType T = NewTD->getUnderlyingType(); |
| 2165 | if (T->isVariablyModifiedType()) { |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 2166 | FunctionNeedsScopeChecking() = true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2167 | |
Chris Lattner | 38c5ebd | 2009-04-19 05:21:20 +0000 | [diff] [blame] | 2168 | if (S->getFnParent() == 0) { |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2169 | bool SizeIsNegative; |
| 2170 | QualType FixedTy = |
| 2171 | TryToFixInvalidVariablyModifiedType(T, Context, SizeIsNegative); |
| 2172 | if (!FixedTy.isNull()) { |
| 2173 | Diag(D.getIdentifierLoc(), diag::warn_illegal_constant_array_size); |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2174 | NewTD->setTypeSourceInfo(Context.getTrivialTypeSourceInfo(FixedTy)); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2175 | } else { |
| 2176 | if (SizeIsNegative) |
| 2177 | Diag(D.getIdentifierLoc(), diag::err_typecheck_negative_array_size); |
| 2178 | else if (T->isVariableArrayType()) |
| 2179 | Diag(D.getIdentifierLoc(), diag::err_vla_decl_in_file_scope); |
| 2180 | else |
| 2181 | Diag(D.getIdentifierLoc(), diag::err_vm_decl_in_file_scope); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2182 | NewTD->setInvalidDecl(); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 2183 | } |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 2184 | } |
| 2185 | } |
Douglas Gregor | c29f77b | 2009-07-07 16:35:42 +0000 | [diff] [blame] | 2186 | |
| 2187 | // If this is the C FILE type, notify the AST context. |
| 2188 | if (IdentifierInfo *II = NewTD->getIdentifier()) |
| 2189 | if (!NewTD->isInvalidDecl() && |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 2190 | NewTD->getDeclContext()->getLookupContext()->isTranslationUnit()) { |
| 2191 | if (II->isStr("FILE")) |
| 2192 | Context.setFILEDecl(NewTD); |
| 2193 | else if (II->isStr("jmp_buf")) |
| 2194 | Context.setjmp_bufDecl(NewTD); |
| 2195 | else if (II->isStr("sigjmp_buf")) |
| 2196 | Context.setsigjmp_bufDecl(NewTD); |
| 2197 | } |
| 2198 | |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 2199 | return NewTD; |
| 2200 | } |
| 2201 | |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 2202 | /// \brief Determines whether the given declaration is an out-of-scope |
| 2203 | /// previous declaration. |
| 2204 | /// |
| 2205 | /// This routine should be invoked when name lookup has found a |
| 2206 | /// previous declaration (PrevDecl) that is not in the scope where a |
| 2207 | /// new declaration by the same name is being introduced. If the new |
| 2208 | /// declaration occurs in a local scope, previous declarations with |
| 2209 | /// linkage may still be considered previous declarations (C99 |
| 2210 | /// 6.2.2p4-5, C++ [basic.link]p6). |
| 2211 | /// |
| 2212 | /// \param PrevDecl the previous declaration found by name |
| 2213 | /// lookup |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2214 | /// |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 2215 | /// \param DC the context in which the new declaration is being |
| 2216 | /// declared. |
| 2217 | /// |
| 2218 | /// \returns true if PrevDecl is an out-of-scope previous declaration |
| 2219 | /// for a new delcaration with the same name. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2220 | static bool |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 2221 | isOutOfScopePreviousDeclaration(NamedDecl *PrevDecl, DeclContext *DC, |
| 2222 | ASTContext &Context) { |
| 2223 | if (!PrevDecl) |
| 2224 | return 0; |
| 2225 | |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 2226 | if (!PrevDecl->hasLinkage()) |
| 2227 | return false; |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 2228 | |
| 2229 | if (Context.getLangOptions().CPlusPlus) { |
| 2230 | // C++ [basic.link]p6: |
| 2231 | // If there is a visible declaration of an entity with linkage |
| 2232 | // having the same name and type, ignoring entities declared |
| 2233 | // outside the innermost enclosing namespace scope, the block |
| 2234 | // scope declaration declares that same entity and receives the |
| 2235 | // linkage of the previous declaration. |
| 2236 | DeclContext *OuterContext = DC->getLookupContext(); |
| 2237 | if (!OuterContext->isFunctionOrMethod()) |
| 2238 | // This rule only applies to block-scope declarations. |
| 2239 | return false; |
| 2240 | else { |
| 2241 | DeclContext *PrevOuterContext = PrevDecl->getDeclContext(); |
| 2242 | if (PrevOuterContext->isRecord()) |
| 2243 | // We found a member function: ignore it. |
| 2244 | return false; |
| 2245 | else { |
| 2246 | // Find the innermost enclosing namespace for the new and |
| 2247 | // previous declarations. |
| 2248 | while (!OuterContext->isFileContext()) |
| 2249 | OuterContext = OuterContext->getParent(); |
| 2250 | while (!PrevOuterContext->isFileContext()) |
| 2251 | PrevOuterContext = PrevOuterContext->getParent(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2252 | |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 2253 | // The previous declaration is in a different namespace, so it |
| 2254 | // isn't the same function. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2255 | if (OuterContext->getPrimaryContext() != |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 2256 | PrevOuterContext->getPrimaryContext()) |
| 2257 | return false; |
| 2258 | } |
| 2259 | } |
| 2260 | } |
| 2261 | |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 2262 | return true; |
| 2263 | } |
| 2264 | |
John McCall | b621766 | 2010-03-15 10:12:16 +0000 | [diff] [blame] | 2265 | static void SetNestedNameSpecifier(DeclaratorDecl *DD, Declarator &D) { |
| 2266 | CXXScopeSpec &SS = D.getCXXScopeSpec(); |
| 2267 | if (!SS.isSet()) return; |
| 2268 | DD->setQualifierInfo(static_cast<NestedNameSpecifier*>(SS.getScopeRep()), |
| 2269 | SS.getRange()); |
| 2270 | } |
| 2271 | |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 2272 | NamedDecl* |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2273 | Sema::ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2274 | QualType R, TypeSourceInfo *TInfo, |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2275 | LookupResult &Previous, |
Douglas Gregor | dfe3f2d | 2009-07-22 17:18:37 +0000 | [diff] [blame] | 2276 | MultiTemplateParamsArg TemplateParamLists, |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 2277 | bool &Redeclaration) { |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2278 | DeclarationName Name = GetNameForDeclarator(D); |
| 2279 | |
| 2280 | // Check that there are no default arguments (C++ only). |
| 2281 | if (getLangOptions().CPlusPlus) |
| 2282 | CheckExtraCXXDefaultArguments(D); |
| 2283 | |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2284 | VarDecl *NewVD; |
| 2285 | VarDecl::StorageClass SC; |
| 2286 | switch (D.getDeclSpec().getStorageClassSpec()) { |
| 2287 | default: assert(0 && "Unknown storage class!"); |
| 2288 | case DeclSpec::SCS_unspecified: SC = VarDecl::None; break; |
| 2289 | case DeclSpec::SCS_extern: SC = VarDecl::Extern; break; |
| 2290 | case DeclSpec::SCS_static: SC = VarDecl::Static; break; |
| 2291 | case DeclSpec::SCS_auto: SC = VarDecl::Auto; break; |
| 2292 | case DeclSpec::SCS_register: SC = VarDecl::Register; break; |
| 2293 | case DeclSpec::SCS_private_extern: SC = VarDecl::PrivateExtern; break; |
| 2294 | case DeclSpec::SCS_mutable: |
| 2295 | // mutable can only appear on non-static class members, so it's always |
| 2296 | // an error here |
| 2297 | Diag(D.getIdentifierLoc(), diag::err_mutable_nonmember); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2298 | D.setInvalidType(); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2299 | SC = VarDecl::None; |
| 2300 | break; |
| 2301 | } |
| 2302 | |
| 2303 | IdentifierInfo *II = Name.getAsIdentifierInfo(); |
| 2304 | if (!II) { |
| 2305 | Diag(D.getIdentifierLoc(), diag::err_bad_variable_name) |
| 2306 | << Name.getAsString(); |
| 2307 | return 0; |
| 2308 | } |
| 2309 | |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 2310 | DiagnoseFunctionSpecifiers(D); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2311 | |
Douglas Gregor | 2d2e9cf | 2009-03-11 20:22:50 +0000 | [diff] [blame] | 2312 | if (!DC->isRecord() && S->getFnParent() == 0) { |
| 2313 | // C99 6.9p2: The storage-class specifiers auto and register shall not |
| 2314 | // appear in the declaration specifiers in an external declaration. |
| 2315 | if (SC == VarDecl::Auto || SC == VarDecl::Register) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2316 | |
Chris Lattner | d4b19d5 | 2009-05-12 21:44:00 +0000 | [diff] [blame] | 2317 | // If this is a register variable with an asm label specified, then this |
| 2318 | // is a GNU extension. |
| 2319 | if (SC == VarDecl::Register && D.getAsmLabel()) |
| 2320 | Diag(D.getIdentifierLoc(), diag::err_unsupported_global_register); |
| 2321 | else |
| 2322 | Diag(D.getIdentifierLoc(), diag::err_typecheck_sclass_fscope); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2323 | D.setInvalidType(); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2324 | } |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2325 | } |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 2326 | if (DC->isRecord() && !CurContext->isRecord()) { |
| 2327 | // This is an out-of-line definition of a static data member. |
| 2328 | if (SC == VarDecl::Static) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2329 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 2330 | diag::err_static_out_of_line) |
| 2331 | << CodeModificationHint::CreateRemoval( |
Chris Lattner | 29d9c1a | 2009-12-06 17:36:05 +0000 | [diff] [blame] | 2332 | D.getDeclSpec().getStorageClassSpecLoc()); |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 2333 | } else if (SC == VarDecl::None) |
| 2334 | SC = VarDecl::Static; |
| 2335 | } |
Anders Carlsson | e98da2e | 2009-06-24 00:28:53 +0000 | [diff] [blame] | 2336 | if (SC == VarDecl::Static) { |
| 2337 | if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(DC)) { |
| 2338 | if (RD->isLocalClass()) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2339 | Diag(D.getIdentifierLoc(), |
Anders Carlsson | e98da2e | 2009-06-24 00:28:53 +0000 | [diff] [blame] | 2340 | diag::err_static_data_member_not_allowed_in_local_class) |
| 2341 | << Name << RD->getDeclName(); |
| 2342 | } |
| 2343 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2344 | |
Douglas Gregor | dfe3f2d | 2009-07-22 17:18:37 +0000 | [diff] [blame] | 2345 | // Match up the template parameter lists with the scope specifier, then |
| 2346 | // determine whether we have a template or a template specialization. |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 2347 | bool isExplicitSpecialization = false; |
Douglas Gregor | dfe3f2d | 2009-07-22 17:18:37 +0000 | [diff] [blame] | 2348 | if (TemplateParameterList *TemplateParams |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 2349 | = MatchTemplateParametersToScopeSpecifier( |
Douglas Gregor | dfe3f2d | 2009-07-22 17:18:37 +0000 | [diff] [blame] | 2350 | D.getDeclSpec().getSourceRange().getBegin(), |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 2351 | D.getCXXScopeSpec(), |
Douglas Gregor | 27eeb5e | 2009-07-22 22:05:02 +0000 | [diff] [blame] | 2352 | (TemplateParameterList**)TemplateParamLists.get(), |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 2353 | TemplateParamLists.size(), |
| 2354 | isExplicitSpecialization)) { |
Douglas Gregor | dfe3f2d | 2009-07-22 17:18:37 +0000 | [diff] [blame] | 2355 | if (TemplateParams->size() > 0) { |
| 2356 | // There is no such thing as a variable template. |
| 2357 | Diag(D.getIdentifierLoc(), diag::err_template_variable) |
| 2358 | << II |
| 2359 | << SourceRange(TemplateParams->getTemplateLoc(), |
| 2360 | TemplateParams->getRAngleLoc()); |
| 2361 | return 0; |
| 2362 | } else { |
| 2363 | // There is an extraneous 'template<>' for this variable. Complain |
| 2364 | // about it, but allow the declaration of the variable. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2365 | Diag(TemplateParams->getTemplateLoc(), |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 2366 | diag::err_template_variable_noparams) |
Douglas Gregor | dfe3f2d | 2009-07-22 17:18:37 +0000 | [diff] [blame] | 2367 | << II |
| 2368 | << SourceRange(TemplateParams->getTemplateLoc(), |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2369 | TemplateParams->getRAngleLoc()); |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 2370 | |
| 2371 | isExplicitSpecialization = true; |
Douglas Gregor | dfe3f2d | 2009-07-22 17:18:37 +0000 | [diff] [blame] | 2372 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2373 | } |
| 2374 | |
| 2375 | NewVD = VarDecl::Create(Context, DC, D.getIdentifierLoc(), |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2376 | II, R, TInfo, SC); |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 2377 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2378 | if (D.isInvalidType()) |
| 2379 | NewVD->setInvalidDecl(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2380 | |
John McCall | b621766 | 2010-03-15 10:12:16 +0000 | [diff] [blame] | 2381 | SetNestedNameSpecifier(NewVD, D); |
| 2382 | |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 2383 | if (D.getDeclSpec().isThreadSpecified()) { |
| 2384 | if (NewVD->hasLocalStorage()) |
| 2385 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_thread_non_global); |
Eli Friedman | 4fb71b0 | 2009-04-19 21:48:33 +0000 | [diff] [blame] | 2386 | else if (!Context.Target.isTLSSupported()) |
| 2387 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_thread_unsupported); |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 2388 | else |
| 2389 | NewVD->setThreadSpecified(true); |
| 2390 | } |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 2391 | |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 2392 | // Set the lexical context. If the declarator has a C++ scope specifier, the |
| 2393 | // lexical context will be different from the semantic context. |
| 2394 | NewVD->setLexicalDeclContext(CurContext); |
| 2395 | |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2396 | // Handle attributes prior to checking for duplicates in MergeVarDecl |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 2397 | ProcessDeclAttributes(S, NewVD, D); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2398 | |
| 2399 | // Handle GNU asm-label extension (encoded as an attribute). |
| 2400 | if (Expr *E = (Expr*) D.getAsmLabel()) { |
| 2401 | // The parser guarantees this is a string. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2402 | StringLiteral *SE = cast<StringLiteral>(E); |
Ted Kremenek | 3d2c43e | 2010-02-11 05:28:37 +0000 | [diff] [blame] | 2403 | NewVD->addAttr(::new (Context) AsmLabelAttr(Context, SE->getString())); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2404 | } |
| 2405 | |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 2406 | // Diagnose shadowed variables before filtering for scope. |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 2407 | if (!D.getCXXScopeSpec().isSet()) |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 2408 | CheckShadow(S, NewVD, Previous); |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 2409 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2410 | // Don't consider existing declarations that are in a different |
| 2411 | // scope and are out-of-semantic-context declarations (if the new |
| 2412 | // declaration has linkage). |
| 2413 | FilterLookupForScope(*this, Previous, DC, S, NewVD->hasLinkage()); |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 2414 | |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2415 | // Merge the decl with the existing one if appropriate. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2416 | if (!Previous.empty()) { |
| 2417 | if (Previous.isSingleResult() && |
| 2418 | isa<FieldDecl>(Previous.getFoundDecl()) && |
| 2419 | D.getCXXScopeSpec().isSet()) { |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2420 | // The user tried to define a non-static data member |
| 2421 | // out-of-line (C++ [dcl.meaning]p1). |
| 2422 | Diag(NewVD->getLocation(), diag::err_nonstatic_member_out_of_line) |
| 2423 | << D.getCXXScopeSpec().getRange(); |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2424 | Previous.clear(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2425 | NewVD->setInvalidDecl(); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2426 | } |
| 2427 | } else if (D.getCXXScopeSpec().isSet()) { |
| 2428 | // No previous declaration in the qualifying scope. |
Douglas Gregor | 3f09327 | 2009-10-13 21:16:44 +0000 | [diff] [blame] | 2429 | Diag(D.getIdentifierLoc(), diag::err_no_member) |
| 2430 | << Name << computeDeclContext(D.getCXXScopeSpec(), true) |
| 2431 | << D.getCXXScopeSpec().getRange(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2432 | NewVD->setInvalidDecl(); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2433 | } |
| 2434 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2435 | CheckVariableDeclaration(NewVD, Previous, Redeclaration); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2436 | |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 2437 | // This is an explicit specialization of a static data member. Check it. |
| 2438 | if (isExplicitSpecialization && !NewVD->isInvalidDecl() && |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2439 | CheckMemberSpecialization(NewVD, Previous)) |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 2440 | NewVD->setInvalidDecl(); |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2441 | |
Ryan Flynn | 478fbc6 | 2009-07-25 22:29:44 +0000 | [diff] [blame] | 2442 | // attributes declared post-definition are currently ignored |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2443 | if (Previous.isSingleResult()) { |
Sebastian Redl | 31310a2 | 2010-02-01 20:16:42 +0000 | [diff] [blame] | 2444 | VarDecl *Def = dyn_cast<VarDecl>(Previous.getFoundDecl()); |
| 2445 | if (Def && (Def = Def->getDefinition()) && |
| 2446 | Def != NewVD && D.hasAttributes()) { |
Ryan Flynn | 478fbc6 | 2009-07-25 22:29:44 +0000 | [diff] [blame] | 2447 | Diag(NewVD->getLocation(), diag::warn_attribute_precede_definition); |
| 2448 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 2449 | } |
| 2450 | } |
| 2451 | |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2452 | // If this is a locally-scoped extern C variable, update the map of |
| 2453 | // such variables. |
Douglas Gregor | 48a83b5 | 2009-09-12 00:17:51 +0000 | [diff] [blame] | 2454 | if (CurContext->isFunctionOrMethod() && NewVD->isExternC() && |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2455 | !NewVD->isInvalidDecl()) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2456 | RegisterLocallyScopedExternCDecl(NewVD, Previous, S); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2457 | |
| 2458 | return NewVD; |
| 2459 | } |
| 2460 | |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 2461 | /// \brief Diagnose variable or built-in function shadowing. Implements |
| 2462 | /// -Wshadow. |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 2463 | /// |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 2464 | /// This method is called whenever a VarDecl is added to a "useful" |
| 2465 | /// scope. |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 2466 | /// |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 2467 | /// \param S the scope in which the shadowing name is being declared |
| 2468 | /// \param R the lookup of the name |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 2469 | /// |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 2470 | void Sema::CheckShadow(Scope *S, VarDecl *D, const LookupResult& R) { |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 2471 | // Return if warning is ignored. |
| 2472 | if (Diags.getDiagnosticLevel(diag::warn_decl_shadow) == Diagnostic::Ignored) |
| 2473 | return; |
| 2474 | |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 2475 | // Don't diagnose declarations at file scope. The scope might not |
| 2476 | // have a DeclContext if (e.g.) we're parsing a function prototype. |
| 2477 | DeclContext *NewDC = static_cast<DeclContext*>(S->getEntity()); |
| 2478 | if (NewDC && NewDC->isFileContext()) |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 2479 | return; |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 2480 | |
| 2481 | // Only diagnose if we're shadowing an unambiguous field or variable. |
Douglas Gregor | c48c916 | 2010-03-17 16:03:44 +0000 | [diff] [blame] | 2482 | if (R.getResultKind() != LookupResult::Found) |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 2483 | return; |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 2484 | |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 2485 | NamedDecl* ShadowedDecl = R.getFoundDecl(); |
| 2486 | if (!isa<VarDecl>(ShadowedDecl) && !isa<FieldDecl>(ShadowedDecl)) |
| 2487 | return; |
| 2488 | |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 2489 | DeclContext *OldDC = ShadowedDecl->getDeclContext(); |
| 2490 | |
| 2491 | // Only warn about certain kinds of shadowing for class members. |
| 2492 | if (NewDC && NewDC->isRecord()) { |
| 2493 | // In particular, don't warn about shadowing non-class members. |
| 2494 | if (!OldDC->isRecord()) |
| 2495 | return; |
| 2496 | |
| 2497 | // TODO: should we warn about static data members shadowing |
| 2498 | // static data members from base classes? |
| 2499 | |
| 2500 | // TODO: don't diagnose for inaccessible shadowed members. |
| 2501 | // This is hard to do perfectly because we might friend the |
| 2502 | // shadowing context, but that's just a false negative. |
| 2503 | } |
| 2504 | |
| 2505 | // Determine what kind of declaration we're shadowing. |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 2506 | unsigned Kind; |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 2507 | if (isa<RecordDecl>(OldDC)) { |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 2508 | if (isa<FieldDecl>(ShadowedDecl)) |
| 2509 | Kind = 3; // field |
| 2510 | else |
| 2511 | Kind = 2; // static data member |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 2512 | } else if (OldDC->isFileContext()) |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 2513 | Kind = 1; // global |
| 2514 | else |
| 2515 | Kind = 0; // local |
| 2516 | |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 2517 | DeclarationName Name = R.getLookupName(); |
| 2518 | |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 2519 | // Emit warning and note. |
John McCall | a369a95 | 2010-03-20 04:12:52 +0000 | [diff] [blame] | 2520 | Diag(R.getNameLoc(), diag::warn_decl_shadow) << Name << Kind << OldDC; |
John McCall | 8472af4 | 2010-03-16 21:48:18 +0000 | [diff] [blame] | 2521 | Diag(ShadowedDecl->getLocation(), diag::note_previous_declaration); |
| 2522 | } |
| 2523 | |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 2524 | /// \brief Check -Wshadow without the advantage of a previous lookup. |
| 2525 | void Sema::CheckShadow(Scope *S, VarDecl *D) { |
| 2526 | LookupResult R(*this, D->getDeclName(), D->getLocation(), |
| 2527 | Sema::LookupOrdinaryName, Sema::ForRedeclaration); |
| 2528 | LookupName(R, S); |
| 2529 | CheckShadow(S, D, R); |
| 2530 | } |
| 2531 | |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2532 | /// \brief Perform semantic checking on a newly-created variable |
| 2533 | /// declaration. |
| 2534 | /// |
| 2535 | /// This routine performs all of the type-checking required for a |
Douglas Gregor | 180bb63 | 2009-05-01 15:47:09 +0000 | [diff] [blame] | 2536 | /// variable declaration once it has been built. It is used both to |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2537 | /// check variables after they have been parsed and their declarators |
Douglas Gregor | 180bb63 | 2009-05-01 15:47:09 +0000 | [diff] [blame] | 2538 | /// have been translated into a declaration, and to check variables |
| 2539 | /// that have been instantiated from a template. |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2540 | /// |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2541 | /// Sets NewVD->isInvalidDecl() if an error was encountered. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2542 | void Sema::CheckVariableDeclaration(VarDecl *NewVD, |
| 2543 | LookupResult &Previous, |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2544 | bool &Redeclaration) { |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2545 | // If the decl is already known invalid, don't check it. |
| 2546 | if (NewVD->isInvalidDecl()) |
| 2547 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2548 | |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2549 | QualType T = NewVD->getType(); |
| 2550 | |
| 2551 | if (T->isObjCInterfaceType()) { |
| 2552 | Diag(NewVD->getLocation(), diag::err_statically_allocated_object); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2553 | return NewVD->setInvalidDecl(); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2554 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2555 | |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2556 | // Emit an error if an address space was applied to decl with local storage. |
| 2557 | // This includes arrays of objects with address space qualifiers, but not |
| 2558 | // automatic variables that point to other address spaces. |
| 2559 | // ISO/IEC TR 18037 S5.1.2 |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2560 | if (NewVD->hasLocalStorage() && (T.getAddressSpace() != 0)) { |
| 2561 | Diag(NewVD->getLocation(), diag::err_as_qualified_auto_decl); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2562 | return NewVD->setInvalidDecl(); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2563 | } |
Fariborz Jahanian | 7b5b317 | 2009-02-21 19:44:02 +0000 | [diff] [blame] | 2564 | |
Mike Stump | f33651c | 2009-04-14 00:57:29 +0000 | [diff] [blame] | 2565 | if (NewVD->hasLocalStorage() && T.isObjCGCWeak() |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 2566 | && !NewVD->hasAttr<BlocksAttr>()) |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2567 | Diag(NewVD->getLocation(), diag::warn_attribute_weak_on_local); |
Fariborz Jahanian | 7b5b317 | 2009-02-21 19:44:02 +0000 | [diff] [blame] | 2568 | |
Chris Lattner | 38c5ebd | 2009-04-19 05:21:20 +0000 | [diff] [blame] | 2569 | bool isVM = T->isVariablyModifiedType(); |
Chris Lattner | be6d259 | 2009-07-19 20:17:11 +0000 | [diff] [blame] | 2570 | if (isVM || NewVD->hasAttr<CleanupAttr>() || |
Chris Lattner | 6d97e5e | 2010-03-01 20:59:53 +0000 | [diff] [blame] | 2571 | NewVD->hasAttr<BlocksAttr>() || |
| 2572 | // FIXME: We need to diagnose jumps passed initialized variables in C++. |
| 2573 | // However, this turns on the scope checker for everything with a variable |
| 2574 | // which may impact compile time. See if we can find a better solution |
| 2575 | // to this, perhaps only checking functions that contain gotos in C++? |
| 2576 | (LangOpts.CPlusPlus && NewVD->hasLocalStorage())) |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 2577 | FunctionNeedsScopeChecking() = true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2578 | |
Chris Lattner | 38c5ebd | 2009-04-19 05:21:20 +0000 | [diff] [blame] | 2579 | if ((isVM && NewVD->hasLinkage()) || |
| 2580 | (T->isVariableArrayType() && NewVD->hasGlobalStorage())) { |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 2581 | bool SizeIsNegative; |
| 2582 | QualType FixedTy = |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2583 | TryToFixInvalidVariablyModifiedType(T, Context, SizeIsNegative); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2584 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2585 | if (FixedTy.isNull() && T->isVariableArrayType()) { |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2586 | const VariableArrayType *VAT = Context.getAsVariableArrayType(T); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2587 | // FIXME: This won't give the correct result for |
| 2588 | // int a[10][n]; |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 2589 | SourceRange SizeRange = VAT->getSizeExpr()->getSourceRange(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2590 | |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 2591 | if (NewVD->isFileVarDecl()) |
| 2592 | Diag(NewVD->getLocation(), diag::err_vla_decl_in_file_scope) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2593 | << SizeRange; |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 2594 | else if (NewVD->getStorageClass() == VarDecl::Static) |
| 2595 | Diag(NewVD->getLocation(), diag::err_vla_decl_has_static_storage) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2596 | << SizeRange; |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 2597 | else |
| 2598 | Diag(NewVD->getLocation(), diag::err_vla_decl_has_extern_linkage) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2599 | << SizeRange; |
| 2600 | return NewVD->setInvalidDecl(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2601 | } |
| 2602 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2603 | if (FixedTy.isNull()) { |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 2604 | if (NewVD->isFileVarDecl()) |
| 2605 | Diag(NewVD->getLocation(), diag::err_vm_decl_in_file_scope); |
| 2606 | else |
| 2607 | Diag(NewVD->getLocation(), diag::err_vm_decl_has_extern_linkage); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2608 | return NewVD->setInvalidDecl(); |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 2609 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2610 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2611 | Diag(NewVD->getLocation(), diag::warn_illegal_constant_array_size); |
| 2612 | NewVD->setType(FixedTy); |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 2613 | } |
| 2614 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2615 | if (Previous.empty() && NewVD->isExternC()) { |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 2616 | // Since we did not find anything by this name and we're declaring |
| 2617 | // an extern "C" variable, look for a non-visible extern "C" |
| 2618 | // declaration with the same name. |
| 2619 | llvm::DenseMap<DeclarationName, NamedDecl *>::iterator Pos |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2620 | = LocallyScopedExternalDecls.find(NewVD->getDeclName()); |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 2621 | if (Pos != LocallyScopedExternalDecls.end()) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2622 | Previous.addDecl(Pos->second); |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 2623 | } |
| 2624 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2625 | if (T->isVoidType() && !NewVD->hasExternalStorage()) { |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2626 | Diag(NewVD->getLocation(), diag::err_typecheck_decl_incomplete_type) |
| 2627 | << T; |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2628 | return NewVD->setInvalidDecl(); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2629 | } |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2630 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 2631 | if (!NewVD->hasLocalStorage() && NewVD->hasAttr<BlocksAttr>()) { |
Mike Stump | ea000bf | 2009-04-30 00:19:40 +0000 | [diff] [blame] | 2632 | Diag(NewVD->getLocation(), diag::err_block_on_nonlocal); |
| 2633 | return NewVD->setInvalidDecl(); |
| 2634 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2635 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 2636 | if (isVM && NewVD->hasAttr<BlocksAttr>()) { |
Mike Stump | c975bb0 | 2009-05-01 23:41:47 +0000 | [diff] [blame] | 2637 | Diag(NewVD->getLocation(), diag::err_block_on_vm); |
| 2638 | return NewVD->setInvalidDecl(); |
| 2639 | } |
| 2640 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2641 | if (!Previous.empty()) { |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 2642 | Redeclaration = true; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2643 | MergeVarDecl(NewVD, Previous); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2644 | } |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2645 | } |
| 2646 | |
Douglas Gregor | a8f32e0 | 2009-10-06 17:59:45 +0000 | [diff] [blame] | 2647 | /// \brief Data used with FindOverriddenMethod |
| 2648 | struct FindOverriddenMethodData { |
| 2649 | Sema *S; |
| 2650 | CXXMethodDecl *Method; |
| 2651 | }; |
| 2652 | |
| 2653 | /// \brief Member lookup function that determines whether a given C++ |
| 2654 | /// method overrides a method in a base class, to be used with |
| 2655 | /// CXXRecordDecl::lookupInBases(). |
John McCall | af8e6ed | 2009-11-12 03:15:40 +0000 | [diff] [blame] | 2656 | static bool FindOverriddenMethod(const CXXBaseSpecifier *Specifier, |
Douglas Gregor | a8f32e0 | 2009-10-06 17:59:45 +0000 | [diff] [blame] | 2657 | CXXBasePath &Path, |
| 2658 | void *UserData) { |
| 2659 | RecordDecl *BaseRecord = Specifier->getType()->getAs<RecordType>()->getDecl(); |
Anders Carlsson | 9549680 | 2009-11-26 20:50:40 +0000 | [diff] [blame] | 2660 | |
Douglas Gregor | a8f32e0 | 2009-10-06 17:59:45 +0000 | [diff] [blame] | 2661 | FindOverriddenMethodData *Data |
| 2662 | = reinterpret_cast<FindOverriddenMethodData*>(UserData); |
Anders Carlsson | 9549680 | 2009-11-26 20:50:40 +0000 | [diff] [blame] | 2663 | |
| 2664 | DeclarationName Name = Data->Method->getDeclName(); |
| 2665 | |
| 2666 | // FIXME: Do we care about other names here too? |
| 2667 | if (Name.getNameKind() == DeclarationName::CXXDestructorName) { |
| 2668 | // We really want to find the base class constructor here. |
| 2669 | QualType T = Data->S->Context.getTypeDeclType(BaseRecord); |
| 2670 | CanQualType CT = Data->S->Context.getCanonicalType(T); |
| 2671 | |
Anders Carlsson | 1a68972 | 2009-11-27 01:26:58 +0000 | [diff] [blame] | 2672 | Name = Data->S->Context.DeclarationNames.getCXXDestructorName(CT); |
Anders Carlsson | 9549680 | 2009-11-26 20:50:40 +0000 | [diff] [blame] | 2673 | } |
| 2674 | |
| 2675 | for (Path.Decls = BaseRecord->lookup(Name); |
Douglas Gregor | a8f32e0 | 2009-10-06 17:59:45 +0000 | [diff] [blame] | 2676 | Path.Decls.first != Path.Decls.second; |
| 2677 | ++Path.Decls.first) { |
| 2678 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(*Path.Decls.first)) { |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2679 | if (MD->isVirtual() && !Data->S->IsOverload(Data->Method, MD)) |
Douglas Gregor | a8f32e0 | 2009-10-06 17:59:45 +0000 | [diff] [blame] | 2680 | return true; |
| 2681 | } |
| 2682 | } |
| 2683 | |
| 2684 | return false; |
| 2685 | } |
| 2686 | |
Sebastian Redl | a165da0 | 2009-11-18 21:51:29 +0000 | [diff] [blame] | 2687 | /// AddOverriddenMethods - See if a method overrides any in the base classes, |
| 2688 | /// and if so, check that it's a valid override and remember it. |
| 2689 | void Sema::AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD) { |
| 2690 | // Look for virtual methods in base classes that this method might override. |
| 2691 | CXXBasePaths Paths; |
| 2692 | FindOverriddenMethodData Data; |
| 2693 | Data.Method = MD; |
| 2694 | Data.S = this; |
| 2695 | if (DC->lookupInBases(&FindOverriddenMethod, &Data, Paths)) { |
| 2696 | for (CXXBasePaths::decl_iterator I = Paths.found_decls_begin(), |
| 2697 | E = Paths.found_decls_end(); I != E; ++I) { |
| 2698 | if (CXXMethodDecl *OldMD = dyn_cast<CXXMethodDecl>(*I)) { |
| 2699 | if (!CheckOverridingFunctionReturnType(MD, OldMD) && |
Sean Hunt | bbd37c6 | 2009-11-21 08:43:09 +0000 | [diff] [blame] | 2700 | !CheckOverridingFunctionExceptionSpec(MD, OldMD) && |
| 2701 | !CheckOverridingFunctionAttributes(MD, OldMD)) |
Anders Carlsson | 3aaf486 | 2009-12-04 05:51:56 +0000 | [diff] [blame] | 2702 | MD->addOverriddenMethod(OldMD->getCanonicalDecl()); |
Sebastian Redl | a165da0 | 2009-11-18 21:51:29 +0000 | [diff] [blame] | 2703 | } |
| 2704 | } |
| 2705 | } |
| 2706 | } |
| 2707 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2708 | NamedDecl* |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2709 | Sema::ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2710 | QualType R, TypeSourceInfo *TInfo, |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2711 | LookupResult &Previous, |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 2712 | MultiTemplateParamsArg TemplateParamLists, |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2713 | bool IsFunctionDefinition, bool &Redeclaration) { |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2714 | assert(R.getTypePtr()->isFunctionType()); |
| 2715 | |
| 2716 | DeclarationName Name = GetNameForDeclarator(D); |
| 2717 | FunctionDecl::StorageClass SC = FunctionDecl::None; |
| 2718 | switch (D.getDeclSpec().getStorageClassSpec()) { |
| 2719 | default: assert(0 && "Unknown storage class!"); |
| 2720 | case DeclSpec::SCS_auto: |
| 2721 | case DeclSpec::SCS_register: |
| 2722 | case DeclSpec::SCS_mutable: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2723 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 2724 | diag::err_typecheck_sclass_func); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2725 | D.setInvalidType(); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2726 | break; |
| 2727 | case DeclSpec::SCS_unspecified: SC = FunctionDecl::None; break; |
| 2728 | case DeclSpec::SCS_extern: SC = FunctionDecl::Extern; break; |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 2729 | case DeclSpec::SCS_static: { |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 2730 | if (CurContext->getLookupContext()->isFunctionOrMethod()) { |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 2731 | // C99 6.7.1p5: |
| 2732 | // The declaration of an identifier for a function that has |
| 2733 | // block scope shall have no explicit storage-class specifier |
| 2734 | // other than extern |
| 2735 | // See also (C++ [dcl.stc]p4). |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2736 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 2737 | diag::err_static_block_func); |
| 2738 | SC = FunctionDecl::None; |
| 2739 | } else |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2740 | SC = FunctionDecl::Static; |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 2741 | break; |
| 2742 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2743 | case DeclSpec::SCS_private_extern: SC = FunctionDecl::PrivateExtern;break; |
| 2744 | } |
| 2745 | |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 2746 | if (D.getDeclSpec().isThreadSpecified()) |
| 2747 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_invalid_thread); |
| 2748 | |
John McCall | 3f9a8a6 | 2009-08-11 06:59:38 +0000 | [diff] [blame] | 2749 | bool isFriend = D.getDeclSpec().isFriendSpecified(); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2750 | bool isInline = D.getDeclSpec().isInlineSpecified(); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2751 | bool isVirtual = D.getDeclSpec().isVirtualSpecified(); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2752 | bool isExplicit = D.getDeclSpec().isExplicitSpecified(); |
| 2753 | |
Anders Carlsson | 4681ebd | 2009-03-22 20:18:17 +0000 | [diff] [blame] | 2754 | // Check that the return type is not an abstract class type. |
Anders Carlsson | 8211eff | 2009-03-24 01:19:16 +0000 | [diff] [blame] | 2755 | // For record types, this is done by the AbstractClassUsageDiagnoser once |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2756 | // the class has been completely parsed. |
Anders Carlsson | 8211eff | 2009-03-24 01:19:16 +0000 | [diff] [blame] | 2757 | if (!DC->isRecord() && |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2758 | RequireNonAbstractType(D.getIdentifierLoc(), |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 2759 | R->getAs<FunctionType>()->getResultType(), |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2760 | diag::err_abstract_type_in_decl, |
Anders Carlsson | 8211eff | 2009-03-24 01:19:16 +0000 | [diff] [blame] | 2761 | AbstractReturnType)) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2762 | D.setInvalidType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2763 | |
Chris Lattner | bb74982 | 2009-04-11 19:17:25 +0000 | [diff] [blame] | 2764 | // Do not allow returning a objc interface by-value. |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 2765 | if (R->getAs<FunctionType>()->getResultType()->isObjCInterfaceType()) { |
Chris Lattner | bb74982 | 2009-04-11 19:17:25 +0000 | [diff] [blame] | 2766 | Diag(D.getIdentifierLoc(), |
| 2767 | diag::err_object_cannot_be_passed_returned_by_value) << 0 |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 2768 | << R->getAs<FunctionType>()->getResultType(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2769 | D.setInvalidType(); |
Chris Lattner | bb74982 | 2009-04-11 19:17:25 +0000 | [diff] [blame] | 2770 | } |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 2771 | |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2772 | bool isVirtualOkay = false; |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2773 | FunctionDecl *NewFD; |
John McCall | 02cace7 | 2009-08-28 07:59:38 +0000 | [diff] [blame] | 2774 | |
John McCall | 3f9a8a6 | 2009-08-11 06:59:38 +0000 | [diff] [blame] | 2775 | if (isFriend) { |
John McCall | 3f9a8a6 | 2009-08-11 06:59:38 +0000 | [diff] [blame] | 2776 | // C++ [class.friend]p5 |
| 2777 | // A function can be defined in a friend declaration of a |
| 2778 | // class . . . . Such a function is implicitly inline. |
| 2779 | isInline |= IsFunctionDefinition; |
John McCall | 02cace7 | 2009-08-28 07:59:38 +0000 | [diff] [blame] | 2780 | } |
John McCall | 3f9a8a6 | 2009-08-11 06:59:38 +0000 | [diff] [blame] | 2781 | |
Douglas Gregor | 3f9a056 | 2009-11-03 01:35:08 +0000 | [diff] [blame] | 2782 | if (Name.getNameKind() == DeclarationName::CXXConstructorName) { |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2783 | // This is a C++ constructor declaration. |
| 2784 | assert(DC->isRecord() && |
| 2785 | "Constructors can only be declared in a member context"); |
| 2786 | |
Chris Lattner | 6540180 | 2009-04-25 08:28:21 +0000 | [diff] [blame] | 2787 | R = CheckConstructorDeclarator(D, R, SC); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2788 | |
| 2789 | // Create the new declaration |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2790 | NewFD = CXXConstructorDecl::Create(Context, |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2791 | cast<CXXRecordDecl>(DC), |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2792 | D.getIdentifierLoc(), Name, R, TInfo, |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2793 | isExplicit, isInline, |
| 2794 | /*isImplicitlyDeclared=*/false); |
Douglas Gregor | 3f9a056 | 2009-11-03 01:35:08 +0000 | [diff] [blame] | 2795 | } else if (Name.getNameKind() == DeclarationName::CXXDestructorName) { |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2796 | // This is a C++ destructor declaration. |
| 2797 | if (DC->isRecord()) { |
Chris Lattner | 6540180 | 2009-04-25 08:28:21 +0000 | [diff] [blame] | 2798 | R = CheckDestructorDeclarator(D, SC); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2799 | |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2800 | NewFD = CXXDestructorDecl::Create(Context, |
| 2801 | cast<CXXRecordDecl>(DC), |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2802 | D.getIdentifierLoc(), Name, R, |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2803 | isInline, |
| 2804 | /*isImplicitlyDeclared=*/false); |
John McCall | 21ef0fa | 2010-03-11 09:03:00 +0000 | [diff] [blame] | 2805 | NewFD->setTypeSourceInfo(TInfo); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2806 | |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2807 | isVirtualOkay = true; |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2808 | } else { |
| 2809 | Diag(D.getIdentifierLoc(), diag::err_destructor_not_member); |
| 2810 | |
| 2811 | // Create a FunctionDecl to satisfy the function definition parsing |
| 2812 | // code path. |
| 2813 | NewFD = FunctionDecl::Create(Context, DC, D.getIdentifierLoc(), |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2814 | Name, R, TInfo, SC, isInline, |
Argyrios Kyrtzidis | a5d8200 | 2009-08-21 00:31:54 +0000 | [diff] [blame] | 2815 | /*hasPrototype=*/true); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2816 | D.setInvalidType(); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2817 | } |
Douglas Gregor | 3f9a056 | 2009-11-03 01:35:08 +0000 | [diff] [blame] | 2818 | } else if (Name.getNameKind() == DeclarationName::CXXConversionFunctionName) { |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2819 | if (!DC->isRecord()) { |
| 2820 | Diag(D.getIdentifierLoc(), |
| 2821 | diag::err_conv_function_not_member); |
| 2822 | return 0; |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2823 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2824 | |
Chris Lattner | 6e47501 | 2009-04-25 08:35:12 +0000 | [diff] [blame] | 2825 | CheckConversionDeclarator(D, R, SC); |
| 2826 | NewFD = CXXConversionDecl::Create(Context, cast<CXXRecordDecl>(DC), |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2827 | D.getIdentifierLoc(), Name, R, TInfo, |
Chris Lattner | 6e47501 | 2009-04-25 08:35:12 +0000 | [diff] [blame] | 2828 | isInline, isExplicit); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2829 | |
Chris Lattner | 6e47501 | 2009-04-25 08:35:12 +0000 | [diff] [blame] | 2830 | isVirtualOkay = true; |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2831 | } else if (DC->isRecord()) { |
Anders Carlsson | 4649cac | 2009-04-30 22:41:11 +0000 | [diff] [blame] | 2832 | // If the of the function is the same as the name of the record, then this |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2833 | // must be an invalid constructor that has a return type. |
| 2834 | // (The parser checks for a return type and makes the declarator a |
Anders Carlsson | 4649cac | 2009-04-30 22:41:11 +0000 | [diff] [blame] | 2835 | // constructor if it has no return type). |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2836 | // must have an invalid constructor that has a return type |
Douglas Gregor | 6f7a17b | 2010-02-05 06:12:42 +0000 | [diff] [blame] | 2837 | if (Name.getAsIdentifierInfo() && |
| 2838 | Name.getAsIdentifierInfo() == cast<CXXRecordDecl>(DC)->getIdentifier()){ |
Anders Carlsson | 4649cac | 2009-04-30 22:41:11 +0000 | [diff] [blame] | 2839 | Diag(D.getIdentifierLoc(), diag::err_constructor_return_type) |
| 2840 | << SourceRange(D.getDeclSpec().getTypeSpecTypeLoc()) |
| 2841 | << SourceRange(D.getIdentifierLoc()); |
| 2842 | return 0; |
| 2843 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2844 | |
Anders Carlsson | 67bf2e7 | 2009-11-15 18:59:32 +0000 | [diff] [blame] | 2845 | bool isStatic = SC == FunctionDecl::Static; |
| 2846 | |
| 2847 | // [class.free]p1: |
| 2848 | // Any allocation function for a class T is a static member |
| 2849 | // (even if not explicitly declared static). |
| 2850 | if (Name.getCXXOverloadedOperator() == OO_New || |
| 2851 | Name.getCXXOverloadedOperator() == OO_Array_New) |
| 2852 | isStatic = true; |
Anders Carlsson | 1f126bd | 2009-11-15 19:08:46 +0000 | [diff] [blame] | 2853 | |
| 2854 | // [class.free]p6 Any deallocation function for a class X is a static member |
| 2855 | // (even if not explicitly declared static). |
| 2856 | if (Name.getCXXOverloadedOperator() == OO_Delete || |
| 2857 | Name.getCXXOverloadedOperator() == OO_Array_Delete) |
| 2858 | isStatic = true; |
Anders Carlsson | 67bf2e7 | 2009-11-15 18:59:32 +0000 | [diff] [blame] | 2859 | |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2860 | // This is a C++ method declaration. |
| 2861 | NewFD = CXXMethodDecl::Create(Context, cast<CXXRecordDecl>(DC), |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2862 | D.getIdentifierLoc(), Name, R, TInfo, |
Anders Carlsson | 67bf2e7 | 2009-11-15 18:59:32 +0000 | [diff] [blame] | 2863 | isStatic, isInline); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2864 | |
Anders Carlsson | 1f126bd | 2009-11-15 19:08:46 +0000 | [diff] [blame] | 2865 | isVirtualOkay = !isStatic; |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2866 | } else { |
Douglas Gregor | d874def | 2009-03-19 18:33:54 +0000 | [diff] [blame] | 2867 | // Determine whether the function was written with a |
| 2868 | // prototype. This true when: |
| 2869 | // - we're in C++ (where every function has a prototype), |
| 2870 | // - there is a prototype in the declarator, or |
| 2871 | // - the type R of the function is some kind of typedef or other reference |
| 2872 | // to a type name (which eventually refers to a function type). |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2873 | bool HasPrototype = |
Chris Lattner | 0d48bf9 | 2009-03-17 23:17:04 +0000 | [diff] [blame] | 2874 | getLangOptions().CPlusPlus || |
Douglas Gregor | 13d7a32 | 2009-03-19 18:14:46 +0000 | [diff] [blame] | 2875 | (D.getNumTypeObjects() && D.getTypeObject(0).Fun.hasPrototype) || |
Douglas Gregor | d1659a6 | 2009-03-23 16:26:51 +0000 | [diff] [blame] | 2876 | (!isa<FunctionType>(R.getTypePtr()) && R->isFunctionProtoType()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2877 | |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2878 | NewFD = FunctionDecl::Create(Context, DC, |
| 2879 | D.getIdentifierLoc(), |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 2880 | Name, R, TInfo, SC, isInline, HasPrototype); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2881 | } |
| 2882 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2883 | if (D.isInvalidType()) |
Chris Lattner | 584be45 | 2009-04-25 05:44:12 +0000 | [diff] [blame] | 2884 | NewFD->setInvalidDecl(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2885 | |
John McCall | b621766 | 2010-03-15 10:12:16 +0000 | [diff] [blame] | 2886 | SetNestedNameSpecifier(NewFD, D); |
| 2887 | |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2888 | // Set the lexical context. If the declarator has a C++ |
John McCall | 02cace7 | 2009-08-28 07:59:38 +0000 | [diff] [blame] | 2889 | // scope specifier, or is the object of a friend declaration, the |
| 2890 | // lexical context will be different from the semantic context. |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2891 | NewFD->setLexicalDeclContext(CurContext); |
| 2892 | |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 2893 | // Match up the template parameter lists with the scope specifier, then |
| 2894 | // determine whether we have a template or a template specialization. |
Douglas Gregor | c5c903a | 2009-06-24 00:23:40 +0000 | [diff] [blame] | 2895 | FunctionTemplateDecl *FunctionTemplate = 0; |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 2896 | bool isExplicitSpecialization = false; |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 2897 | bool isFunctionTemplateSpecialization = false; |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 2898 | if (TemplateParameterList *TemplateParams |
| 2899 | = MatchTemplateParametersToScopeSpecifier( |
| 2900 | D.getDeclSpec().getSourceRange().getBegin(), |
| 2901 | D.getCXXScopeSpec(), |
Douglas Gregor | 27eeb5e | 2009-07-22 22:05:02 +0000 | [diff] [blame] | 2902 | (TemplateParameterList**)TemplateParamLists.get(), |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 2903 | TemplateParamLists.size(), |
| 2904 | isExplicitSpecialization)) { |
Douglas Gregor | c5c903a | 2009-06-24 00:23:40 +0000 | [diff] [blame] | 2905 | if (TemplateParams->size() > 0) { |
| 2906 | // This is a function template |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2907 | |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 2908 | // Check that we can declare a template here. |
| 2909 | if (CheckTemplateDeclScope(S, TemplateParams)) |
| 2910 | return 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2911 | |
Douglas Gregor | d60e105 | 2009-08-27 16:57:43 +0000 | [diff] [blame] | 2912 | FunctionTemplate = FunctionTemplateDecl::Create(Context, DC, |
Douglas Gregor | c5c903a | 2009-06-24 00:23:40 +0000 | [diff] [blame] | 2913 | NewFD->getLocation(), |
| 2914 | Name, TemplateParams, |
| 2915 | NewFD); |
Douglas Gregor | d60e105 | 2009-08-27 16:57:43 +0000 | [diff] [blame] | 2916 | FunctionTemplate->setLexicalDeclContext(CurContext); |
Douglas Gregor | c5c903a | 2009-06-24 00:23:40 +0000 | [diff] [blame] | 2917 | NewFD->setDescribedFunctionTemplate(FunctionTemplate); |
| 2918 | } else { |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 2919 | // This is a function template specialization. |
| 2920 | isFunctionTemplateSpecialization = true; |
John McCall | 7ad650f | 2010-03-24 07:46:06 +0000 | [diff] [blame] | 2921 | |
| 2922 | // C++0x [temp.expl.spec]p20 forbids "template<> void foo(int);". |
| 2923 | if (isFriend && isFunctionTemplateSpecialization) { |
John McCall | 5fd378b | 2010-03-24 08:27:58 +0000 | [diff] [blame] | 2924 | // We want to remove the "template<>", found here. |
| 2925 | SourceRange RemoveRange = TemplateParams->getSourceRange(); |
| 2926 | |
| 2927 | // If we remove the template<> and the name is not a |
| 2928 | // template-id, we're actually silently creating a problem: |
| 2929 | // the friend declaration will refer to an untemplated decl, |
| 2930 | // and clearly the user wants a template specialization. So |
| 2931 | // we need to insert '<>' after the name. |
| 2932 | SourceLocation InsertLoc; |
| 2933 | if (D.getName().getKind() != UnqualifiedId::IK_TemplateId) { |
| 2934 | InsertLoc = D.getName().getSourceRange().getEnd(); |
| 2935 | InsertLoc = PP.getLocForEndOfToken(InsertLoc); |
| 2936 | } |
| 2937 | |
John McCall | 7ad650f | 2010-03-24 07:46:06 +0000 | [diff] [blame] | 2938 | Diag(D.getIdentifierLoc(), diag::err_template_spec_decl_friend) |
John McCall | 5fd378b | 2010-03-24 08:27:58 +0000 | [diff] [blame] | 2939 | << Name << RemoveRange |
| 2940 | << CodeModificationHint::CreateRemoval(RemoveRange) |
| 2941 | << CodeModificationHint::CreateInsertion(InsertLoc, "<>"); |
John McCall | 7ad650f | 2010-03-24 07:46:06 +0000 | [diff] [blame] | 2942 | } |
Douglas Gregor | c5c903a | 2009-06-24 00:23:40 +0000 | [diff] [blame] | 2943 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2944 | |
Douglas Gregor | 27eeb5e | 2009-07-22 22:05:02 +0000 | [diff] [blame] | 2945 | // FIXME: Free this memory properly. |
| 2946 | TemplateParamLists.release(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2947 | } |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 2948 | |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2949 | // C++ [dcl.fct.spec]p5: |
| 2950 | // The virtual specifier shall only be used in declarations of |
| 2951 | // nonstatic class member functions that appear within a |
| 2952 | // member-specification of a class declaration; see 10.3. |
| 2953 | // |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2954 | if (isVirtual && !NewFD->isInvalidDecl()) { |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2955 | if (!isVirtualOkay) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 2956 | Diag(D.getDeclSpec().getVirtualSpecLoc(), |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2957 | diag::err_virtual_non_function); |
| 2958 | } else if (!CurContext->isRecord()) { |
| 2959 | // 'virtual' was specified outside of the class. |
| 2960 | Diag(D.getDeclSpec().getVirtualSpecLoc(), diag::err_virtual_out_of_class) |
| 2961 | << CodeModificationHint::CreateRemoval( |
Chris Lattner | 29d9c1a | 2009-12-06 17:36:05 +0000 | [diff] [blame] | 2962 | D.getDeclSpec().getVirtualSpecLoc()); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2963 | } else { |
| 2964 | // Okay: Add virtual to the method. |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2965 | CXXRecordDecl *CurClass = cast<CXXRecordDecl>(DC); |
Fariborz Jahanian | e7184df | 2009-12-03 18:44:40 +0000 | [diff] [blame] | 2966 | CurClass->setMethodAsVirtual(NewFD); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2967 | } |
| 2968 | } |
| 2969 | |
Anders Carlsson | 0757c8c | 2010-01-24 16:49:46 +0000 | [diff] [blame] | 2970 | // C++ [dcl.fct.spec]p6: |
| 2971 | // The explicit specifier shall be used only in the declaration of a |
| 2972 | // constructor or conversion function within its class definition; see 12.3.1 |
| 2973 | // and 12.3.2. |
| 2974 | if (isExplicit && !NewFD->isInvalidDecl()) { |
| 2975 | if (!CurContext->isRecord()) { |
| 2976 | // 'explicit' was specified outside of the class. |
| 2977 | Diag(D.getDeclSpec().getExplicitSpecLoc(), |
| 2978 | diag::err_explicit_out_of_class) |
| 2979 | << CodeModificationHint::CreateRemoval( |
| 2980 | D.getDeclSpec().getExplicitSpecLoc()); |
| 2981 | } else if (!isa<CXXConstructorDecl>(NewFD) && |
| 2982 | !isa<CXXConversionDecl>(NewFD)) { |
| 2983 | // 'explicit' was specified on a function that wasn't a constructor |
| 2984 | // or conversion function. |
| 2985 | Diag(D.getDeclSpec().getExplicitSpecLoc(), |
| 2986 | diag::err_explicit_non_ctor_or_conv_function) |
| 2987 | << CodeModificationHint::CreateRemoval( |
| 2988 | D.getDeclSpec().getExplicitSpecLoc()); |
| 2989 | } |
| 2990 | } |
| 2991 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2992 | // Filter out previous declarations that don't match the scope. |
| 2993 | FilterLookupForScope(*this, Previous, DC, S, NewFD->hasLinkage()); |
| 2994 | |
Douglas Gregor | a735b20 | 2009-10-13 14:39:41 +0000 | [diff] [blame] | 2995 | if (isFriend) { |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 2996 | // DC is the namespace in which the function is being declared. |
| 2997 | assert((DC->isFileContext() || !Previous.empty()) && |
| 2998 | "previously-undeclared friend function being created " |
| 2999 | "in a non-namespace context"); |
| 3000 | |
Douglas Gregor | a735b20 | 2009-10-13 14:39:41 +0000 | [diff] [blame] | 3001 | if (FunctionTemplate) { |
| 3002 | FunctionTemplate->setObjectOfFriendDecl( |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3003 | /* PreviouslyDeclared= */ !Previous.empty()); |
Douglas Gregor | a735b20 | 2009-10-13 14:39:41 +0000 | [diff] [blame] | 3004 | FunctionTemplate->setAccess(AS_public); |
| 3005 | } |
| 3006 | else |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3007 | NewFD->setObjectOfFriendDecl(/* PreviouslyDeclared= */ !Previous.empty()); |
Douglas Gregor | a735b20 | 2009-10-13 14:39:41 +0000 | [diff] [blame] | 3008 | |
| 3009 | NewFD->setAccess(AS_public); |
| 3010 | } |
| 3011 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3012 | if (SC == FunctionDecl::Static && isa<CXXMethodDecl>(NewFD) && |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 3013 | !CurContext->isRecord()) { |
| 3014 | // C++ [class.static]p1: |
| 3015 | // A data or function member of a class may be declared static |
| 3016 | // in a class definition, in which case it is a static member of |
| 3017 | // the class. |
| 3018 | |
| 3019 | // Complain about the 'static' specifier if it's on an out-of-line |
| 3020 | // member function definition. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3021 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 3022 | diag::err_static_out_of_line) |
| 3023 | << CodeModificationHint::CreateRemoval( |
Chris Lattner | 29d9c1a | 2009-12-06 17:36:05 +0000 | [diff] [blame] | 3024 | D.getDeclSpec().getStorageClassSpecLoc()); |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 3025 | } |
| 3026 | |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3027 | // Handle GNU asm-label extension (encoded as an attribute). |
| 3028 | if (Expr *E = (Expr*) D.getAsmLabel()) { |
| 3029 | // The parser guarantees this is a string. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3030 | StringLiteral *SE = cast<StringLiteral>(E); |
Ted Kremenek | 3d2c43e | 2010-02-11 05:28:37 +0000 | [diff] [blame] | 3031 | NewFD->addAttr(::new (Context) AsmLabelAttr(Context, SE->getString())); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3032 | } |
| 3033 | |
Chris Lattner | 2dbd285 | 2009-04-25 06:12:16 +0000 | [diff] [blame] | 3034 | // Copy the parameter declarations from the declarator D to the function |
| 3035 | // declaration NewFD, if they are available. First scavenge them into Params. |
| 3036 | llvm::SmallVector<ParmVarDecl*, 16> Params; |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3037 | if (D.getNumTypeObjects() > 0) { |
| 3038 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(0).Fun; |
| 3039 | |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3040 | // Check for C99 6.7.5.3p10 - foo(void) is a non-varargs |
| 3041 | // function that takes no arguments, not a function that takes a |
| 3042 | // single void argument. |
| 3043 | // We let through "const void" here because Sema::GetTypeForDeclarator |
| 3044 | // already checks for that case. |
| 3045 | if (FTI.NumArgs == 1 && !FTI.isVariadic && FTI.ArgInfo[0].Ident == 0 && |
| 3046 | FTI.ArgInfo[0].Param && |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 3047 | FTI.ArgInfo[0].Param.getAs<ParmVarDecl>()->getType()->isVoidType()) { |
Chris Lattner | 2dbd285 | 2009-04-25 06:12:16 +0000 | [diff] [blame] | 3048 | // Empty arg list, don't push any params. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 3049 | ParmVarDecl *Param = FTI.ArgInfo[0].Param.getAs<ParmVarDecl>(); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3050 | |
| 3051 | // In C++, the empty parameter-type-list must be spelled "void"; a |
| 3052 | // typedef of void is not permitted. |
| 3053 | if (getLangOptions().CPlusPlus && |
Chris Lattner | 584be45 | 2009-04-25 05:44:12 +0000 | [diff] [blame] | 3054 | Param->getType().getUnqualifiedType() != Context.VoidTy) |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 3055 | Diag(Param->getLocation(), diag::err_param_typedef_of_void); |
Chris Lattner | 2dbd285 | 2009-04-25 06:12:16 +0000 | [diff] [blame] | 3056 | // FIXME: Leaks decl? |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3057 | } else if (FTI.NumArgs > 0 && FTI.ArgInfo[0].Param != 0) { |
Argyrios Kyrtzidis | 9bedef6 | 2009-07-14 03:18:53 +0000 | [diff] [blame] | 3058 | for (unsigned i = 0, e = FTI.NumArgs; i != e; ++i) { |
| 3059 | ParmVarDecl *Param = FTI.ArgInfo[i].Param.getAs<ParmVarDecl>(); |
| 3060 | assert(Param->getDeclContext() != NewFD && "Was set before ?"); |
| 3061 | Param->setDeclContext(NewFD); |
| 3062 | Params.push_back(Param); |
| 3063 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3064 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3065 | |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 3066 | } else if (const FunctionProtoType *FT = R->getAs<FunctionProtoType>()) { |
Chris Lattner | 1ad9b28 | 2009-04-25 06:03:53 +0000 | [diff] [blame] | 3067 | // 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] | 3068 | // following example, we'll need to synthesize (unnamed) |
| 3069 | // parameters for use in the declaration. |
| 3070 | // |
| 3071 | // @code |
| 3072 | // typedef void fn(int); |
| 3073 | // fn f; |
| 3074 | // @endcode |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3075 | |
Chris Lattner | 1ad9b28 | 2009-04-25 06:03:53 +0000 | [diff] [blame] | 3076 | // Synthesize a parameter for each argument type. |
Chris Lattner | 1ad9b28 | 2009-04-25 06:03:53 +0000 | [diff] [blame] | 3077 | for (FunctionProtoType::arg_type_iterator AI = FT->arg_type_begin(), |
| 3078 | AE = FT->arg_type_end(); AI != AE; ++AI) { |
John McCall | 7a9813c | 2010-01-22 00:28:27 +0000 | [diff] [blame] | 3079 | ParmVarDecl *Param = ParmVarDecl::Create(Context, NewFD, |
Chris Lattner | 1ad9b28 | 2009-04-25 06:03:53 +0000 | [diff] [blame] | 3080 | SourceLocation(), 0, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 3081 | *AI, /*TInfo=*/0, |
Argyrios Kyrtzidis | a1d5662 | 2009-08-19 01:27:57 +0000 | [diff] [blame] | 3082 | VarDecl::None, 0); |
Chris Lattner | 1ad9b28 | 2009-04-25 06:03:53 +0000 | [diff] [blame] | 3083 | Param->setImplicit(); |
| 3084 | Params.push_back(Param); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3085 | } |
Chris Lattner | 84bb944 | 2009-04-25 18:38:18 +0000 | [diff] [blame] | 3086 | } else { |
| 3087 | assert(R->isFunctionNoProtoType() && NewFD->getNumParams() == 0 && |
| 3088 | "Should not need args for typedef of non-prototype fn"); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3089 | } |
Chris Lattner | 2dbd285 | 2009-04-25 06:12:16 +0000 | [diff] [blame] | 3090 | // Finally, we know we have the right number of parameters, install them. |
Douglas Gregor | 838db38 | 2010-02-11 01:19:42 +0000 | [diff] [blame] | 3091 | NewFD->setParams(Params.data(), Params.size()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3092 | |
Douglas Gregor | 0b60d9e | 2009-09-25 23:53:26 +0000 | [diff] [blame] | 3093 | // If the declarator is a template-id, translate the parser's template |
| 3094 | // argument list into our AST format. |
| 3095 | bool HasExplicitTemplateArgs = false; |
John McCall | d5532b6 | 2009-11-23 01:53:49 +0000 | [diff] [blame] | 3096 | TemplateArgumentListInfo TemplateArgs; |
Douglas Gregor | 3f9a056 | 2009-11-03 01:35:08 +0000 | [diff] [blame] | 3097 | if (D.getName().getKind() == UnqualifiedId::IK_TemplateId) { |
| 3098 | TemplateIdAnnotation *TemplateId = D.getName().TemplateId; |
John McCall | d5532b6 | 2009-11-23 01:53:49 +0000 | [diff] [blame] | 3099 | TemplateArgs.setLAngleLoc(TemplateId->LAngleLoc); |
| 3100 | TemplateArgs.setRAngleLoc(TemplateId->RAngleLoc); |
Douglas Gregor | 0b60d9e | 2009-09-25 23:53:26 +0000 | [diff] [blame] | 3101 | ASTTemplateArgsPtr TemplateArgsPtr(*this, |
| 3102 | TemplateId->getTemplateArgs(), |
Douglas Gregor | 0b60d9e | 2009-09-25 23:53:26 +0000 | [diff] [blame] | 3103 | TemplateId->NumArgs); |
| 3104 | translateTemplateArguments(TemplateArgsPtr, |
Douglas Gregor | 0b60d9e | 2009-09-25 23:53:26 +0000 | [diff] [blame] | 3105 | TemplateArgs); |
| 3106 | TemplateArgsPtr.release(); |
| 3107 | |
| 3108 | HasExplicitTemplateArgs = true; |
Douglas Gregor | 0b60d9e | 2009-09-25 23:53:26 +0000 | [diff] [blame] | 3109 | |
| 3110 | if (FunctionTemplate) { |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 3111 | // FIXME: Diagnose function template with explicit template |
Douglas Gregor | 0b60d9e | 2009-09-25 23:53:26 +0000 | [diff] [blame] | 3112 | // arguments. |
| 3113 | HasExplicitTemplateArgs = false; |
| 3114 | } else if (!isFunctionTemplateSpecialization && |
| 3115 | !D.getDeclSpec().isFriendSpecified()) { |
| 3116 | // We have encountered something that the user meant to be a |
| 3117 | // specialization (because it has explicitly-specified template |
| 3118 | // arguments) but that was not introduced with a "template<>" (or had |
| 3119 | // too few of them). |
| 3120 | Diag(D.getIdentifierLoc(), diag::err_template_spec_needs_header) |
| 3121 | << SourceRange(TemplateId->LAngleLoc, TemplateId->RAngleLoc) |
| 3122 | << CodeModificationHint::CreateInsertion( |
| 3123 | D.getDeclSpec().getSourceRange().getBegin(), |
| 3124 | "template<> "); |
| 3125 | isFunctionTemplateSpecialization = true; |
John McCall | 7ad650f | 2010-03-24 07:46:06 +0000 | [diff] [blame] | 3126 | } else { |
| 3127 | // "friend void foo<>(int);" is an implicit specialization decl. |
| 3128 | isFunctionTemplateSpecialization = true; |
Douglas Gregor | 0b60d9e | 2009-09-25 23:53:26 +0000 | [diff] [blame] | 3129 | } |
| 3130 | } |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3131 | |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 3132 | if (isFunctionTemplateSpecialization) { |
Douglas Gregor | 036ada2 | 2010-03-24 17:31:23 +0000 | [diff] [blame] | 3133 | if (isFriend && NewFD->getType()->isDependentType()) { |
| 3134 | // FIXME: When we see a friend of a function template |
| 3135 | // specialization with a dependent type, we can't match it now; |
| 3136 | // for now, we just drop it, until we have a reasonable way to |
| 3137 | // represent the parsed-but-not-matched friend function template |
| 3138 | // specialization in the AST. |
| 3139 | return 0; |
| 3140 | } else if (CheckFunctionTemplateSpecialization(NewFD, |
| 3141 | (HasExplicitTemplateArgs ? &TemplateArgs : 0), |
| 3142 | Previous)) |
| 3143 | NewFD->setInvalidDecl(); |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 3144 | } else if (isExplicitSpecialization && isa<CXXMethodDecl>(NewFD) && |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3145 | CheckMemberSpecialization(NewFD, Previous)) |
Douglas Gregor | b9aa6b2 | 2009-09-24 23:14:47 +0000 | [diff] [blame] | 3146 | NewFD->setInvalidDecl(); |
Douglas Gregor | fd056bc | 2009-10-13 16:30:37 +0000 | [diff] [blame] | 3147 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3148 | // Perform semantic checking on the function declaration. |
| 3149 | bool OverloadableAttrRequired = false; // FIXME: HACK! |
John McCall | 9f54ad4 | 2009-12-10 09:41:52 +0000 | [diff] [blame] | 3150 | CheckFunctionDeclaration(S, NewFD, Previous, isExplicitSpecialization, |
Douglas Gregor | fd056bc | 2009-10-13 16:30:37 +0000 | [diff] [blame] | 3151 | Redeclaration, /*FIXME:*/OverloadableAttrRequired); |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3152 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3153 | assert((NewFD->isInvalidDecl() || !Redeclaration || |
| 3154 | Previous.getResultKind() != LookupResult::FoundOverloaded) && |
| 3155 | "previous declaration set still overloaded"); |
| 3156 | |
Douglas Gregor | 5b6d70e | 2009-11-25 17:50:39 +0000 | [diff] [blame] | 3157 | // If we have a function template, check the template parameter |
| 3158 | // list. This will check and merge default template arguments. |
| 3159 | if (FunctionTemplate) { |
| 3160 | FunctionTemplateDecl *PrevTemplate = FunctionTemplate->getPreviousDeclaration(); |
| 3161 | CheckTemplateParameterList(FunctionTemplate->getTemplateParameters(), |
| 3162 | PrevTemplate? PrevTemplate->getTemplateParameters() : 0, |
| 3163 | D.getDeclSpec().isFriendSpecified()? TPC_FriendFunctionTemplate |
| 3164 | : TPC_FunctionTemplate); |
| 3165 | } |
| 3166 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3167 | if (D.getCXXScopeSpec().isSet() && !NewFD->isInvalidDecl()) { |
John McCall | 46460a6 | 2010-01-20 21:53:11 +0000 | [diff] [blame] | 3168 | // Fake up an access specifier if it's supposed to be a class member. |
John McCall | 86ff308 | 2010-02-04 22:26:26 +0000 | [diff] [blame] | 3169 | if (!Redeclaration && isa<CXXRecordDecl>(NewFD->getDeclContext())) |
John McCall | 46460a6 | 2010-01-20 21:53:11 +0000 | [diff] [blame] | 3170 | NewFD->setAccess(AS_public); |
| 3171 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3172 | // An out-of-line member function declaration must also be a |
| 3173 | // definition (C++ [dcl.meaning]p1). |
Douglas Gregor | 741fab6 | 2009-10-08 15:54:21 +0000 | [diff] [blame] | 3174 | // Note that this is not the case for explicit specializations of |
| 3175 | // function templates or member functions of class templates, per |
| 3176 | // C++ [temp.expl.spec]p2. |
Douglas Gregor | d85cef5 | 2009-09-17 19:51:30 +0000 | [diff] [blame] | 3177 | if (!IsFunctionDefinition && !isFriend && |
Douglas Gregor | 37d68185 | 2009-10-12 22:27:17 +0000 | [diff] [blame] | 3178 | !isFunctionTemplateSpecialization && !isExplicitSpecialization) { |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3179 | Diag(NewFD->getLocation(), diag::err_out_of_line_declaration) |
| 3180 | << D.getCXXScopeSpec().getRange(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3181 | NewFD->setInvalidDecl(); |
Douglas Gregor | 5d52e47 | 2010-01-16 18:09:52 +0000 | [diff] [blame] | 3182 | } else if (!Redeclaration && |
| 3183 | !(isFriend && CurContext->isDependentContext())) { |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3184 | // The user tried to provide an out-of-line definition for a |
| 3185 | // function that is a member of a class or namespace, but there |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3186 | // was no such member function declared (C++ [class.mfct]p2, |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3187 | // C++ [namespace.memdef]p2). For example: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3188 | // |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3189 | // class X { |
| 3190 | // void f() const; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3191 | // }; |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3192 | // |
| 3193 | // void X::f() { } // ill-formed |
| 3194 | // |
| 3195 | // Complain about this problem, and attempt to suggest close |
| 3196 | // matches (e.g., those that differ only in cv-qualifiers and |
| 3197 | // whether the parameter types are references). |
| 3198 | Diag(D.getIdentifierLoc(), diag::err_member_def_does_not_match) |
Douglas Gregor | 3f09327 | 2009-10-13 21:16:44 +0000 | [diff] [blame] | 3199 | << Name << DC << D.getCXXScopeSpec().getRange(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3200 | NewFD->setInvalidDecl(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3201 | |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 3202 | LookupResult Prev(*this, Name, D.getIdentifierLoc(), LookupOrdinaryName, |
John McCall | 7d384dd | 2009-11-18 07:57:50 +0000 | [diff] [blame] | 3203 | ForRedeclaration); |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 3204 | LookupQualifiedName(Prev, DC); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3205 | assert(!Prev.isAmbiguous() && |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3206 | "Cannot have an ambiguity in previous-declaration lookup"); |
| 3207 | for (LookupResult::iterator Func = Prev.begin(), FuncEnd = Prev.end(); |
| 3208 | Func != FuncEnd; ++Func) { |
| 3209 | if (isa<FunctionDecl>(*Func) && |
| 3210 | isNearlyMatchingFunction(Context, cast<FunctionDecl>(*Func), NewFD)) |
| 3211 | Diag((*Func)->getLocation(), diag::note_member_def_close_match); |
| 3212 | } |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3213 | } |
| 3214 | } |
| 3215 | |
| 3216 | // Handle attributes. We need to have merged decls when handling attributes |
| 3217 | // (for example to check for conflicts, etc). |
| 3218 | // FIXME: This needs to happen before we merge declarations. Then, |
| 3219 | // let attribute merging cope with attribute conflicts. |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 3220 | ProcessDeclAttributes(S, NewFD, D); |
Ryan Flynn | 478fbc6 | 2009-07-25 22:29:44 +0000 | [diff] [blame] | 3221 | |
| 3222 | // attributes declared post-definition are currently ignored |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3223 | if (Redeclaration && Previous.isSingleResult()) { |
| 3224 | const FunctionDecl *Def; |
| 3225 | FunctionDecl *PrevFD = dyn_cast<FunctionDecl>(Previous.getFoundDecl()); |
Ryan Flynn | 478fbc6 | 2009-07-25 22:29:44 +0000 | [diff] [blame] | 3226 | if (PrevFD && PrevFD->getBody(Def) && D.hasAttributes()) { |
| 3227 | Diag(NewFD->getLocation(), diag::warn_attribute_precede_definition); |
| 3228 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 3229 | } |
| 3230 | } |
| 3231 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3232 | AddKnownFunctionAttributes(NewFD); |
| 3233 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 3234 | if (OverloadableAttrRequired && !NewFD->getAttr<OverloadableAttr>()) { |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3235 | // If a function name is overloadable in C, then every function |
| 3236 | // with that name must be marked "overloadable". |
| 3237 | Diag(NewFD->getLocation(), diag::err_attribute_overloadable_missing) |
| 3238 | << Redeclaration << NewFD; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3239 | if (!Previous.empty()) |
| 3240 | Diag(Previous.getRepresentativeDecl()->getLocation(), |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3241 | diag::note_attribute_overloadable_prev_overload); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 3242 | NewFD->addAttr(::new (Context) OverloadableAttr()); |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3243 | } |
| 3244 | |
| 3245 | // If this is a locally-scoped extern C function, update the |
| 3246 | // map of such names. |
Douglas Gregor | 48a83b5 | 2009-09-12 00:17:51 +0000 | [diff] [blame] | 3247 | if (CurContext->isFunctionOrMethod() && NewFD->isExternC() |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3248 | && !NewFD->isInvalidDecl()) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3249 | RegisterLocallyScopedExternCDecl(NewFD, Previous, S); |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3250 | |
Argyrios Kyrtzidis | 16f1930 | 2009-06-25 18:22:24 +0000 | [diff] [blame] | 3251 | // Set this FunctionDecl's range up to the right paren. |
| 3252 | NewFD->setLocEnd(D.getSourceRange().getEnd()); |
| 3253 | |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 3254 | if (FunctionTemplate && NewFD->isInvalidDecl()) |
| 3255 | FunctionTemplate->setInvalidDecl(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3256 | |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 3257 | if (FunctionTemplate) |
| 3258 | return FunctionTemplate; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3259 | |
Tanya Lattner | e6bbc01 | 2010-02-12 00:07:30 +0000 | [diff] [blame] | 3260 | |
| 3261 | // Keep track of static, non-inlined function definitions that |
| 3262 | // have not been used. We will warn later. |
| 3263 | // FIXME: Also include static functions declared but not defined. |
| 3264 | if (!NewFD->isInvalidDecl() && IsFunctionDefinition |
| 3265 | && !NewFD->isInlined() && NewFD->getLinkage() == InternalLinkage |
Tanya Lattner | c777221 | 2010-02-17 04:48:01 +0000 | [diff] [blame] | 3266 | && !NewFD->isUsed() && !NewFD->hasAttr<UnusedAttr>()) |
Tanya Lattner | e6bbc01 | 2010-02-12 00:07:30 +0000 | [diff] [blame] | 3267 | UnusedStaticFuncs.push_back(NewFD); |
| 3268 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3269 | return NewFD; |
| 3270 | } |
| 3271 | |
| 3272 | /// \brief Perform semantic checking of a new function declaration. |
| 3273 | /// |
| 3274 | /// Performs semantic analysis of the new function declaration |
| 3275 | /// NewFD. This routine performs all semantic checking that does not |
| 3276 | /// require the actual declarator involved in the declaration, and is |
| 3277 | /// used both for the declaration of functions as they are parsed |
| 3278 | /// (called via ActOnDeclarator) and for the declaration of functions |
| 3279 | /// that have been instantiated via C++ template instantiation (called |
| 3280 | /// via InstantiateDecl). |
| 3281 | /// |
Douglas Gregor | fd056bc | 2009-10-13 16:30:37 +0000 | [diff] [blame] | 3282 | /// \param IsExplicitSpecialiation whether this new function declaration is |
| 3283 | /// an explicit specialization of the previous declaration. |
| 3284 | /// |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3285 | /// This sets NewFD->isInvalidDecl() to true if there was an error. |
John McCall | 9f54ad4 | 2009-12-10 09:41:52 +0000 | [diff] [blame] | 3286 | void Sema::CheckFunctionDeclaration(Scope *S, FunctionDecl *NewFD, |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3287 | LookupResult &Previous, |
Douglas Gregor | fd056bc | 2009-10-13 16:30:37 +0000 | [diff] [blame] | 3288 | bool IsExplicitSpecialization, |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3289 | bool &Redeclaration, |
| 3290 | bool &OverloadableAttrRequired) { |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3291 | // If NewFD is already known erroneous, don't do any of this checking. |
| 3292 | if (NewFD->isInvalidDecl()) |
| 3293 | return; |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3294 | |
Eli Friedman | 88f7b57 | 2009-05-16 12:15:55 +0000 | [diff] [blame] | 3295 | if (NewFD->getResultType()->isVariablyModifiedType()) { |
| 3296 | // Functions returning a variably modified type violate C99 6.7.5.2p2 |
| 3297 | // because all functions have linkage. |
| 3298 | Diag(NewFD->getLocation(), diag::err_vm_func_decl); |
| 3299 | return NewFD->setInvalidDecl(); |
| 3300 | } |
| 3301 | |
Douglas Gregor | 48a83b5 | 2009-09-12 00:17:51 +0000 | [diff] [blame] | 3302 | if (NewFD->isMain()) |
| 3303 | CheckMain(NewFD); |
John McCall | 8c4859a | 2009-07-24 03:03:21 +0000 | [diff] [blame] | 3304 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3305 | // Check for a previous declaration of this name. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3306 | if (Previous.empty() && NewFD->isExternC()) { |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 3307 | // Since we did not find anything by this name and we're declaring |
| 3308 | // an extern "C" function, look for a non-visible extern "C" |
| 3309 | // declaration with the same name. |
| 3310 | llvm::DenseMap<DeclarationName, NamedDecl *>::iterator Pos |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3311 | = LocallyScopedExternalDecls.find(NewFD->getDeclName()); |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 3312 | if (Pos != LocallyScopedExternalDecls.end()) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3313 | Previous.addDecl(Pos->second); |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 3314 | } |
| 3315 | |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 3316 | // Merge or overload the declaration with an existing declaration of |
| 3317 | // the same name, if appropriate. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3318 | if (!Previous.empty()) { |
Douglas Gregor | f9201e0 | 2009-02-11 23:02:49 +0000 | [diff] [blame] | 3319 | // Determine whether NewFD is an overload of PrevDecl or |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3320 | // a declaration that requires merging. If it's an overload, |
| 3321 | // there's no more work to do here; we'll just add the new |
| 3322 | // function to the scope. |
Douglas Gregor | ae17094 | 2009-02-13 00:26:38 +0000 | [diff] [blame] | 3323 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3324 | NamedDecl *OldDecl = 0; |
John McCall | 871b2e7 | 2009-12-09 03:35:25 +0000 | [diff] [blame] | 3325 | if (!AllowOverloadingOfFunction(Previous, Context)) { |
| 3326 | Redeclaration = true; |
| 3327 | OldDecl = Previous.getFoundDecl(); |
| 3328 | } else { |
| 3329 | if (!getLangOptions().CPlusPlus) { |
| 3330 | OverloadableAttrRequired = true; |
| 3331 | |
| 3332 | // Functions marked "overloadable" must have a prototype (that |
| 3333 | // we can't get through declaration merging). |
| 3334 | if (!NewFD->getType()->getAs<FunctionProtoType>()) { |
| 3335 | Diag(NewFD->getLocation(), |
| 3336 | diag::err_attribute_overloadable_no_prototype) |
| 3337 | << NewFD; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3338 | Redeclaration = true; |
John McCall | 871b2e7 | 2009-12-09 03:35:25 +0000 | [diff] [blame] | 3339 | |
| 3340 | // Turn this into a variadic function with no parameters. |
| 3341 | QualType R = Context.getFunctionType( |
| 3342 | NewFD->getType()->getAs<FunctionType>()->getResultType(), |
Douglas Gregor | ce056bc | 2010-02-21 22:15:06 +0000 | [diff] [blame] | 3343 | 0, 0, true, 0, false, false, 0, 0, false, CC_Default); |
John McCall | 871b2e7 | 2009-12-09 03:35:25 +0000 | [diff] [blame] | 3344 | NewFD->setType(R); |
| 3345 | return NewFD->setInvalidDecl(); |
| 3346 | } |
| 3347 | } |
| 3348 | |
| 3349 | switch (CheckOverload(NewFD, Previous, OldDecl)) { |
| 3350 | case Ovl_Match: |
John McCall | 9f54ad4 | 2009-12-10 09:41:52 +0000 | [diff] [blame] | 3351 | Redeclaration = true; |
| 3352 | if (isa<UsingShadowDecl>(OldDecl) && CurContext->isRecord()) { |
| 3353 | HideUsingShadowDecl(S, cast<UsingShadowDecl>(OldDecl)); |
| 3354 | Redeclaration = false; |
| 3355 | } |
John McCall | 871b2e7 | 2009-12-09 03:35:25 +0000 | [diff] [blame] | 3356 | break; |
| 3357 | |
| 3358 | case Ovl_NonFunction: |
| 3359 | Redeclaration = true; |
| 3360 | break; |
| 3361 | |
| 3362 | case Ovl_Overload: |
| 3363 | Redeclaration = false; |
| 3364 | break; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3365 | } |
| 3366 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3367 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3368 | if (Redeclaration) { |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3369 | // NewFD and OldDecl represent declarations that need to be |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3370 | // merged. |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 3371 | if (MergeFunctionDecl(NewFD, OldDecl)) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3372 | return NewFD->setInvalidDecl(); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3373 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 3374 | Previous.clear(); |
| 3375 | Previous.addDecl(OldDecl); |
| 3376 | |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 3377 | if (FunctionTemplateDecl *OldTemplateDecl |
Douglas Gregor | 37d68185 | 2009-10-12 22:27:17 +0000 | [diff] [blame] | 3378 | = dyn_cast<FunctionTemplateDecl>(OldDecl)) { |
Douglas Gregor | fd056bc | 2009-10-13 16:30:37 +0000 | [diff] [blame] | 3379 | NewFD->setPreviousDeclaration(OldTemplateDecl->getTemplatedDecl()); |
Douglas Gregor | 37d68185 | 2009-10-12 22:27:17 +0000 | [diff] [blame] | 3380 | FunctionTemplateDecl *NewTemplateDecl |
| 3381 | = NewFD->getDescribedFunctionTemplate(); |
| 3382 | assert(NewTemplateDecl && "Template/non-template mismatch"); |
| 3383 | if (CXXMethodDecl *Method |
| 3384 | = dyn_cast<CXXMethodDecl>(NewTemplateDecl->getTemplatedDecl())) { |
| 3385 | Method->setAccess(OldTemplateDecl->getAccess()); |
| 3386 | NewTemplateDecl->setAccess(OldTemplateDecl->getAccess()); |
| 3387 | } |
Douglas Gregor | fd056bc | 2009-10-13 16:30:37 +0000 | [diff] [blame] | 3388 | |
| 3389 | // If this is an explicit specialization of a member that is a function |
| 3390 | // template, mark it as a member specialization. |
| 3391 | if (IsExplicitSpecialization && |
| 3392 | NewTemplateDecl->getInstantiatedFromMemberTemplate()) { |
| 3393 | NewTemplateDecl->setMemberSpecialization(); |
| 3394 | assert(OldTemplateDecl->isMemberSpecialization()); |
| 3395 | } |
Douglas Gregor | 37d68185 | 2009-10-12 22:27:17 +0000 | [diff] [blame] | 3396 | } else { |
Argyrios Kyrtzidis | 9bedef6 | 2009-07-14 03:18:53 +0000 | [diff] [blame] | 3397 | if (isa<CXXMethodDecl>(NewFD)) // Set access for out-of-line definitions |
| 3398 | NewFD->setAccess(OldDecl->getAccess()); |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 3399 | NewFD->setPreviousDeclaration(cast<FunctionDecl>(OldDecl)); |
Argyrios Kyrtzidis | 9bedef6 | 2009-07-14 03:18:53 +0000 | [diff] [blame] | 3400 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3401 | } |
Douglas Gregor | 4ce205f | 2009-02-06 17:46:57 +0000 | [diff] [blame] | 3402 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3403 | |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 3404 | // Semantic checking for this function declaration (in isolation). |
| 3405 | if (getLangOptions().CPlusPlus) { |
| 3406 | // C++-specific checks. |
| 3407 | if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(NewFD)) { |
| 3408 | CheckConstructor(Constructor); |
Anders Carlsson | 6d70139 | 2009-11-15 22:49:34 +0000 | [diff] [blame] | 3409 | } else if (CXXDestructorDecl *Destructor = |
| 3410 | dyn_cast<CXXDestructorDecl>(NewFD)) { |
| 3411 | CXXRecordDecl *Record = Destructor->getParent(); |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 3412 | QualType ClassType = Context.getTypeDeclType(Record); |
Anders Carlsson | 6d70139 | 2009-11-15 22:49:34 +0000 | [diff] [blame] | 3413 | |
| 3414 | // FIXME: Shouldn't we be able to perform thisc heck even when the class |
| 3415 | // type is dependent? Both gcc and edg can handle that. |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 3416 | if (!ClassType->isDependentType()) { |
| 3417 | DeclarationName Name |
| 3418 | = Context.DeclarationNames.getCXXDestructorName( |
| 3419 | Context.getCanonicalType(ClassType)); |
| 3420 | if (NewFD->getDeclName() != Name) { |
| 3421 | Diag(NewFD->getLocation(), diag::err_destructor_name); |
| 3422 | return NewFD->setInvalidDecl(); |
| 3423 | } |
| 3424 | } |
Anders Carlsson | 6d70139 | 2009-11-15 22:49:34 +0000 | [diff] [blame] | 3425 | |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 3426 | Record->setUserDeclaredDestructor(true); |
| 3427 | // C++ [class]p4: A POD-struct is an aggregate class that has [...] no |
| 3428 | // user-defined destructor. |
| 3429 | Record->setPOD(false); |
| 3430 | |
| 3431 | // C++ [class.dtor]p3: A destructor is trivial if it is an implicitly- |
| 3432 | // declared destructor. |
| 3433 | // FIXME: C++0x: don't do this for "= default" destructors |
| 3434 | Record->setHasTrivialDestructor(false); |
| 3435 | } else if (CXXConversionDecl *Conversion |
Douglas Gregor | 4ba3136 | 2009-12-01 17:24:26 +0000 | [diff] [blame] | 3436 | = dyn_cast<CXXConversionDecl>(NewFD)) { |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 3437 | ActOnConversionDeclarator(Conversion); |
Douglas Gregor | 4ba3136 | 2009-12-01 17:24:26 +0000 | [diff] [blame] | 3438 | } |
| 3439 | |
| 3440 | // Find any virtual functions that this function overrides. |
Douglas Gregor | e6342c0 | 2009-12-01 17:35:23 +0000 | [diff] [blame] | 3441 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(NewFD)) { |
| 3442 | if (!Method->isFunctionTemplateSpecialization() && |
| 3443 | !Method->getDescribedFunctionTemplate()) |
| 3444 | AddOverriddenMethods(Method->getParent(), Method); |
| 3445 | } |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 3446 | |
Eli Friedman | 5fcf1f0 | 2009-12-02 07:16:50 +0000 | [diff] [blame] | 3447 | // Additional checks for the destructor; make sure we do this after we |
| 3448 | // figure out whether the destructor is virtual. |
| 3449 | if (CXXDestructorDecl *Destructor = dyn_cast<CXXDestructorDecl>(NewFD)) |
| 3450 | if (!Destructor->getParent()->isDependentType()) |
| 3451 | CheckDestructor(Destructor); |
| 3452 | |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 3453 | // Extra checking for C++ overloaded operators (C++ [over.oper]). |
| 3454 | if (NewFD->isOverloadedOperator() && |
| 3455 | CheckOverloadedOperatorDeclaration(NewFD)) |
| 3456 | return NewFD->setInvalidDecl(); |
Sean Hunt | a6c058d | 2010-01-13 09:01:02 +0000 | [diff] [blame] | 3457 | |
| 3458 | // Extra checking for C++0x literal operators (C++0x [over.literal]). |
| 3459 | if (NewFD->getLiteralIdentifier() && |
| 3460 | CheckLiteralOperatorDeclaration(NewFD)) |
| 3461 | return NewFD->setInvalidDecl(); |
| 3462 | |
Anders Carlsson | 2c59d3c | 2009-09-13 21:33:06 +0000 | [diff] [blame] | 3463 | // In C++, check default arguments now that we have merged decls. Unless |
| 3464 | // the lexical context is the class, because in this case this is done |
| 3465 | // during delayed parsing anyway. |
| 3466 | if (!CurContext->isRecord()) |
| 3467 | CheckCXXDefaultArguments(NewFD); |
| 3468 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 3469 | } |
| 3470 | |
John McCall | 8c4859a | 2009-07-24 03:03:21 +0000 | [diff] [blame] | 3471 | void Sema::CheckMain(FunctionDecl* FD) { |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 3472 | // C++ [basic.start.main]p3: A program that declares main to be inline |
| 3473 | // or static is ill-formed. |
| 3474 | // C99 6.7.4p4: In a hosted environment, the inline function specifier |
| 3475 | // shall not appear in a declaration of main. |
| 3476 | // 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] | 3477 | bool isInline = FD->isInlineSpecified(); |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 3478 | bool isStatic = FD->getStorageClass() == FunctionDecl::Static; |
| 3479 | if (isInline || isStatic) { |
| 3480 | unsigned diagID = diag::warn_unusual_main_decl; |
| 3481 | if (isInline || getLangOptions().CPlusPlus) |
| 3482 | diagID = diag::err_unusual_main_decl; |
| 3483 | |
| 3484 | int which = isStatic + (isInline << 1) - 1; |
| 3485 | Diag(FD->getLocation(), diagID) << which; |
| 3486 | } |
| 3487 | |
| 3488 | QualType T = FD->getType(); |
| 3489 | assert(T->isFunctionType() && "function decl is not of function type"); |
John McCall | 183700f | 2009-09-21 23:43:11 +0000 | [diff] [blame] | 3490 | const FunctionType* FT = T->getAs<FunctionType>(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3491 | |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 3492 | if (!Context.hasSameUnqualifiedType(FT->getResultType(), Context.IntTy)) { |
| 3493 | // TODO: add a replacement fixit to turn the return type into 'int'. |
| 3494 | Diag(FD->getTypeSpecStartLoc(), diag::err_main_returns_nonint); |
| 3495 | FD->setInvalidDecl(true); |
| 3496 | } |
| 3497 | |
| 3498 | // Treat protoless main() as nullary. |
| 3499 | if (isa<FunctionNoProtoType>(FT)) return; |
| 3500 | |
| 3501 | const FunctionProtoType* FTP = cast<const FunctionProtoType>(FT); |
| 3502 | unsigned nparams = FTP->getNumArgs(); |
| 3503 | assert(FD->getNumParams() == nparams); |
| 3504 | |
John McCall | 6675586 | 2009-12-24 09:58:38 +0000 | [diff] [blame] | 3505 | bool HasExtraParameters = (nparams > 3); |
| 3506 | |
| 3507 | // Darwin passes an undocumented fourth argument of type char**. If |
| 3508 | // other platforms start sprouting these, the logic below will start |
| 3509 | // getting shifty. |
| 3510 | if (nparams == 4 && |
| 3511 | Context.Target.getTriple().getOS() == llvm::Triple::Darwin) |
| 3512 | HasExtraParameters = false; |
| 3513 | |
| 3514 | if (HasExtraParameters) { |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 3515 | Diag(FD->getLocation(), diag::err_main_surplus_args) << nparams; |
| 3516 | FD->setInvalidDecl(true); |
| 3517 | nparams = 3; |
| 3518 | } |
| 3519 | |
| 3520 | // FIXME: a lot of the following diagnostics would be improved |
| 3521 | // if we had some location information about types. |
| 3522 | |
| 3523 | QualType CharPP = |
| 3524 | Context.getPointerType(Context.getPointerType(Context.CharTy)); |
John McCall | 6675586 | 2009-12-24 09:58:38 +0000 | [diff] [blame] | 3525 | QualType Expected[] = { Context.IntTy, CharPP, CharPP, CharPP }; |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 3526 | |
| 3527 | for (unsigned i = 0; i < nparams; ++i) { |
| 3528 | QualType AT = FTP->getArgType(i); |
| 3529 | |
| 3530 | bool mismatch = true; |
| 3531 | |
| 3532 | if (Context.hasSameUnqualifiedType(AT, Expected[i])) |
| 3533 | mismatch = false; |
| 3534 | else if (Expected[i] == CharPP) { |
| 3535 | // As an extension, the following forms are okay: |
| 3536 | // char const ** |
| 3537 | // char const * const * |
| 3538 | // char * const * |
| 3539 | |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 3540 | QualifierCollector qs; |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 3541 | const PointerType* PT; |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 3542 | if ((PT = qs.strip(AT)->getAs<PointerType>()) && |
| 3543 | (PT = qs.strip(PT->getPointeeType())->getAs<PointerType>()) && |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 3544 | (QualType(qs.strip(PT->getPointeeType()), 0) == Context.CharTy)) { |
| 3545 | qs.removeConst(); |
| 3546 | mismatch = !qs.empty(); |
| 3547 | } |
| 3548 | } |
| 3549 | |
| 3550 | if (mismatch) { |
| 3551 | Diag(FD->getLocation(), diag::err_main_arg_wrong) << i << Expected[i]; |
| 3552 | // TODO: suggest replacing given type with expected type |
| 3553 | FD->setInvalidDecl(true); |
| 3554 | } |
| 3555 | } |
| 3556 | |
| 3557 | if (nparams == 1 && !FD->isInvalidDecl()) { |
| 3558 | Diag(FD->getLocation(), diag::warn_main_one_arg); |
| 3559 | } |
John McCall | 8c4859a | 2009-07-24 03:03:21 +0000 | [diff] [blame] | 3560 | } |
| 3561 | |
Eli Friedman | c594b32 | 2008-05-20 13:48:25 +0000 | [diff] [blame] | 3562 | bool Sema::CheckForConstantInitializer(Expr *Init, QualType DclT) { |
Eli Friedman | 3b8a36a | 2009-02-27 04:17:12 +0000 | [diff] [blame] | 3563 | // FIXME: Need strict checking. In C89, we need to check for |
| 3564 | // any assignment, increment, decrement, function-calls, or |
| 3565 | // commas outside of a sizeof. In C99, it's the same list, |
| 3566 | // except that the aforementioned are allowed in unevaluated |
| 3567 | // expressions. Everything else falls under the |
| 3568 | // "may accept other forms of constant expressions" exception. |
| 3569 | // (We never end up here for C++, so the constant expression |
| 3570 | // rules there don't matter.) |
Chris Lattner | 111c2ee | 2009-02-24 21:54:33 +0000 | [diff] [blame] | 3571 | if (Init->isConstantInitializer(Context)) |
Eli Friedman | 578a972 | 2009-02-22 06:45:27 +0000 | [diff] [blame] | 3572 | return false; |
Eli Friedman | 2129828 | 2009-02-26 04:47:58 +0000 | [diff] [blame] | 3573 | Diag(Init->getExprLoc(), diag::err_init_element_not_constant) |
| 3574 | << Init->getSourceRange(); |
Eli Friedman | c594b32 | 2008-05-20 13:48:25 +0000 | [diff] [blame] | 3575 | return true; |
Steve Naroff | d0091aa | 2008-01-10 22:15:12 +0000 | [diff] [blame] | 3576 | } |
| 3577 | |
Anders Carlsson | 9abf2ae | 2009-08-16 05:13:48 +0000 | [diff] [blame] | 3578 | void Sema::AddInitializerToDecl(DeclPtrTy dcl, ExprArg init) { |
| 3579 | AddInitializerToDecl(dcl, move(init), /*DirectInit=*/false); |
Douglas Gregor | 09f41cf | 2009-01-14 15:45:31 +0000 | [diff] [blame] | 3580 | } |
| 3581 | |
| 3582 | /// AddInitializerToDecl - Adds the initializer Init to the |
| 3583 | /// declaration dcl. If DirectInit is true, this is C++ direct |
| 3584 | /// initialization rather than copy initialization. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 3585 | void Sema::AddInitializerToDecl(DeclPtrTy dcl, ExprArg init, bool DirectInit) { |
| 3586 | Decl *RealDecl = dcl.getAs<Decl>(); |
Chris Lattner | 9a11b9a | 2007-10-19 20:10:30 +0000 | [diff] [blame] | 3587 | // If there is no declaration, there was an error parsing it. Just ignore |
| 3588 | // the initializer. |
Eli Friedman | 3b8a36a | 2009-02-27 04:17:12 +0000 | [diff] [blame] | 3589 | if (RealDecl == 0) |
Chris Lattner | 9a11b9a | 2007-10-19 20:10:30 +0000 | [diff] [blame] | 3590 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3591 | |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 3592 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(RealDecl)) { |
| 3593 | // With declarators parsed the way they are, the parser cannot |
| 3594 | // distinguish between a normal initializer and a pure-specifier. |
| 3595 | // Thus this grotesque test. |
| 3596 | IntegerLiteral *IL; |
| 3597 | Expr *Init = static_cast<Expr *>(init.get()); |
| 3598 | if ((IL = dyn_cast<IntegerLiteral>(Init)) && IL->getValue() == 0 && |
Douglas Gregor | 4ba3136 | 2009-12-01 17:24:26 +0000 | [diff] [blame] | 3599 | Context.getCanonicalType(IL->getType()) == Context.IntTy) |
| 3600 | CheckPureMethod(Method, Init->getSourceRange()); |
| 3601 | else { |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 3602 | Diag(Method->getLocation(), diag::err_member_function_initialization) |
| 3603 | << Method->getDeclName() << Init->getSourceRange(); |
| 3604 | Method->setInvalidDecl(); |
| 3605 | } |
| 3606 | return; |
| 3607 | } |
| 3608 | |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 3609 | VarDecl *VDecl = dyn_cast<VarDecl>(RealDecl); |
| 3610 | if (!VDecl) { |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 3611 | if (getLangOptions().CPlusPlus && |
| 3612 | RealDecl->getLexicalDeclContext()->isRecord() && |
| 3613 | isa<NamedDecl>(RealDecl)) |
| 3614 | Diag(RealDecl->getLocation(), diag::err_member_initialization) |
| 3615 | << cast<NamedDecl>(RealDecl)->getDeclName(); |
| 3616 | else |
| 3617 | Diag(RealDecl->getLocation(), diag::err_illegal_initializer); |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 3618 | RealDecl->setInvalidDecl(); |
| 3619 | return; |
Eli Friedman | 3b8a36a | 2009-02-27 04:17:12 +0000 | [diff] [blame] | 3620 | } |
| 3621 | |
Eli Friedman | 49e2b8e | 2009-11-14 03:40:14 +0000 | [diff] [blame] | 3622 | // A definition must end up with a complete type, which means it must be |
| 3623 | // complete with the restriction that an array type might be completed by the |
| 3624 | // initializer; note that later code assumes this restriction. |
| 3625 | QualType BaseDeclType = VDecl->getType(); |
| 3626 | if (const ArrayType *Array = Context.getAsIncompleteArrayType(BaseDeclType)) |
| 3627 | BaseDeclType = Array->getElementType(); |
| 3628 | if (RequireCompleteType(VDecl->getLocation(), BaseDeclType, |
Eli Friedman | a31feca | 2009-04-13 21:28:54 +0000 | [diff] [blame] | 3629 | diag::err_typecheck_decl_incomplete_type)) { |
| 3630 | RealDecl->setInvalidDecl(); |
| 3631 | return; |
| 3632 | } |
| 3633 | |
Douglas Gregor | 1ab537b | 2009-12-03 18:33:45 +0000 | [diff] [blame] | 3634 | // The variable can not have an abstract class type. |
| 3635 | if (RequireNonAbstractType(VDecl->getLocation(), VDecl->getType(), |
| 3636 | diag::err_abstract_type_in_decl, |
| 3637 | AbstractVariableType)) |
| 3638 | VDecl->setInvalidDecl(); |
| 3639 | |
Sebastian Redl | 31310a2 | 2010-02-01 20:16:42 +0000 | [diff] [blame] | 3640 | const VarDecl *Def; |
| 3641 | if ((Def = VDecl->getDefinition()) && Def != VDecl) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3642 | Diag(VDecl->getLocation(), diag::err_redefinition) |
Douglas Gregor | 275a369 | 2009-03-10 23:43:53 +0000 | [diff] [blame] | 3643 | << VDecl->getDeclName(); |
| 3644 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 3645 | VDecl->setInvalidDecl(); |
| 3646 | return; |
| 3647 | } |
| 3648 | |
Eli Friedman | 3b8a36a | 2009-02-27 04:17:12 +0000 | [diff] [blame] | 3649 | // Take ownership of the expression, now that we're sure we have somewhere |
| 3650 | // to put it. |
Anders Carlsson | f1b1d59 | 2009-05-01 19:30:39 +0000 | [diff] [blame] | 3651 | Expr *Init = init.takeAs<Expr>(); |
Eli Friedman | 3b8a36a | 2009-02-27 04:17:12 +0000 | [diff] [blame] | 3652 | assert(Init && "missing initializer"); |
| 3653 | |
Douglas Gregor | 99a2e60 | 2009-12-16 01:38:02 +0000 | [diff] [blame] | 3654 | // Capture the variable that is being initialized and the style of |
| 3655 | // initialization. |
| 3656 | InitializedEntity Entity = InitializedEntity::InitializeVariable(VDecl); |
| 3657 | |
| 3658 | // FIXME: Poor source location information. |
| 3659 | InitializationKind Kind |
| 3660 | = DirectInit? InitializationKind::CreateDirect(VDecl->getLocation(), |
| 3661 | Init->getLocStart(), |
| 3662 | Init->getLocEnd()) |
| 3663 | : InitializationKind::CreateCopy(VDecl->getLocation(), |
| 3664 | Init->getLocStart()); |
| 3665 | |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 3666 | // Get the decls type and save a reference for later, since |
Steve Naroff | d0091aa | 2008-01-10 22:15:12 +0000 | [diff] [blame] | 3667 | // CheckInitializerTypes may change it. |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 3668 | QualType DclT = VDecl->getType(), SavT = DclT; |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 3669 | if (VDecl->isBlockVarDecl()) { |
Daniel Dunbar | 5466c7b | 2009-04-14 02:25:56 +0000 | [diff] [blame] | 3670 | if (VDecl->hasExternalStorage()) { // C99 6.7.8p5 |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 3671 | Diag(VDecl->getLocation(), diag::err_block_extern_cant_init); |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 3672 | VDecl->setInvalidDecl(); |
| 3673 | } else if (!VDecl->isInvalidDecl()) { |
Eli Friedman | cfdc81a | 2009-12-19 08:11:05 +0000 | [diff] [blame] | 3674 | InitializationSequence InitSeq(*this, Entity, Kind, &Init, 1); |
Eli Friedman | a91eb54 | 2009-12-22 02:10:53 +0000 | [diff] [blame] | 3675 | OwningExprResult Result = InitSeq.Perform(*this, Entity, Kind, |
Eli Friedman | cfdc81a | 2009-12-19 08:11:05 +0000 | [diff] [blame] | 3676 | MultiExprArg(*this, (void**)&Init, 1), |
Eli Friedman | a91eb54 | 2009-12-22 02:10:53 +0000 | [diff] [blame] | 3677 | &DclT); |
| 3678 | if (Result.isInvalid()) { |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 3679 | VDecl->setInvalidDecl(); |
Eli Friedman | cfdc81a | 2009-12-19 08:11:05 +0000 | [diff] [blame] | 3680 | return; |
| 3681 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3682 | |
Eli Friedman | a91eb54 | 2009-12-22 02:10:53 +0000 | [diff] [blame] | 3683 | Init = Result.takeAs<Expr>(); |
| 3684 | |
Anders Carlsson | c5eb731 | 2008-08-22 05:00:02 +0000 | [diff] [blame] | 3685 | // C++ 3.6.2p2, allow dynamic initialization of static initializers. |
Eli Friedman | da15323 | 2009-02-20 01:34:21 +0000 | [diff] [blame] | 3686 | // Don't check invalid declarations to avoid emitting useless diagnostics. |
| 3687 | if (!getLangOptions().CPlusPlus && !VDecl->isInvalidDecl()) { |
Daniel Dunbar | 5466c7b | 2009-04-14 02:25:56 +0000 | [diff] [blame] | 3688 | if (VDecl->getStorageClass() == VarDecl::Static) // C99 6.7.8p4. |
Anders Carlsson | c5eb731 | 2008-08-22 05:00:02 +0000 | [diff] [blame] | 3689 | CheckForConstantInitializer(Init, DclT); |
| 3690 | } |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 3691 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3692 | } else if (VDecl->isStaticDataMember() && |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 3693 | VDecl->getLexicalDeclContext()->isRecord()) { |
| 3694 | // This is an in-class initialization for a static data member, e.g., |
| 3695 | // |
| 3696 | // struct S { |
| 3697 | // static const int value = 17; |
| 3698 | // }; |
| 3699 | |
| 3700 | // Attach the initializer |
Douglas Gregor | 838db38 | 2010-02-11 01:19:42 +0000 | [diff] [blame] | 3701 | VDecl->setInit(Init); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 3702 | |
| 3703 | // C++ [class.mem]p4: |
| 3704 | // A member-declarator can contain a constant-initializer only |
| 3705 | // if it declares a static member (9.4) of const integral or |
| 3706 | // const enumeration type, see 9.4.2. |
| 3707 | QualType T = VDecl->getType(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3708 | if (!T->isDependentType() && |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 3709 | (!Context.getCanonicalType(T).isConstQualified() || |
| 3710 | !T->isIntegralType())) { |
| 3711 | Diag(VDecl->getLocation(), diag::err_member_initialization) |
| 3712 | << VDecl->getDeclName() << Init->getSourceRange(); |
| 3713 | VDecl->setInvalidDecl(); |
| 3714 | } else { |
| 3715 | // C++ [class.static.data]p4: |
| 3716 | // If a static data member is of const integral or const |
| 3717 | // enumeration type, its declaration in the class definition |
| 3718 | // can specify a constant-initializer which shall be an |
| 3719 | // integral constant expression (5.19). |
| 3720 | if (!Init->isTypeDependent() && |
| 3721 | !Init->getType()->isIntegralType()) { |
| 3722 | // We have a non-dependent, non-integral or enumeration type. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3723 | Diag(Init->getSourceRange().getBegin(), |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 3724 | diag::err_in_class_initializer_non_integral_type) |
| 3725 | << Init->getType() << Init->getSourceRange(); |
| 3726 | VDecl->setInvalidDecl(); |
| 3727 | } else if (!Init->isTypeDependent() && !Init->isValueDependent()) { |
| 3728 | // Check whether the expression is a constant expression. |
| 3729 | llvm::APSInt Value; |
| 3730 | SourceLocation Loc; |
| 3731 | if (!Init->isIntegerConstantExpr(Value, Context, &Loc)) { |
| 3732 | Diag(Loc, diag::err_in_class_initializer_non_constant) |
| 3733 | << Init->getSourceRange(); |
| 3734 | VDecl->setInvalidDecl(); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3735 | } else if (!VDecl->getType()->isDependentType()) |
Eli Friedman | 73c39ab | 2009-10-20 08:27:19 +0000 | [diff] [blame] | 3736 | ImpCastExprToType(Init, VDecl->getType(), CastExpr::CK_IntegralCast); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 3737 | } |
| 3738 | } |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 3739 | } else if (VDecl->isFileVarDecl()) { |
Steve Naroff | ee3899e | 2009-04-15 15:20:03 +0000 | [diff] [blame] | 3740 | if (VDecl->getStorageClass() == VarDecl::Extern) |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 3741 | Diag(VDecl->getLocation(), diag::warn_extern_init); |
Eli Friedman | a91eb54 | 2009-12-22 02:10:53 +0000 | [diff] [blame] | 3742 | if (!VDecl->isInvalidDecl()) { |
| 3743 | InitializationSequence InitSeq(*this, Entity, Kind, &Init, 1); |
| 3744 | OwningExprResult Result = InitSeq.Perform(*this, Entity, Kind, |
| 3745 | MultiExprArg(*this, (void**)&Init, 1), |
| 3746 | &DclT); |
| 3747 | if (Result.isInvalid()) { |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 3748 | VDecl->setInvalidDecl(); |
Eli Friedman | a91eb54 | 2009-12-22 02:10:53 +0000 | [diff] [blame] | 3749 | return; |
| 3750 | } |
| 3751 | |
| 3752 | Init = Result.takeAs<Expr>(); |
| 3753 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3754 | |
Anders Carlsson | c5eb731 | 2008-08-22 05:00:02 +0000 | [diff] [blame] | 3755 | // C++ 3.6.2p2, allow dynamic initialization of static initializers. |
Eli Friedman | da15323 | 2009-02-20 01:34:21 +0000 | [diff] [blame] | 3756 | // Don't check invalid declarations to avoid emitting useless diagnostics. |
| 3757 | if (!getLangOptions().CPlusPlus && !VDecl->isInvalidDecl()) { |
Anders Carlsson | c5eb731 | 2008-08-22 05:00:02 +0000 | [diff] [blame] | 3758 | // C99 6.7.8p4. All file scoped initializers need to be constant. |
| 3759 | CheckForConstantInitializer(Init, DclT); |
| 3760 | } |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 3761 | } |
| 3762 | // 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] | 3763 | // completed by the initializer. For example: |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 3764 | // int ary[] = { 1, 3, 5 }; |
| 3765 | // "ary" transitions from a VariableArrayType to a ConstantArrayType. |
Christopher Lamb | 48b1239 | 2007-11-29 19:09:19 +0000 | [diff] [blame] | 3766 | if (!VDecl->isInvalidDecl() && (DclT != SavT)) { |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 3767 | VDecl->setType(DclT); |
Christopher Lamb | 48b1239 | 2007-11-29 19:09:19 +0000 | [diff] [blame] | 3768 | Init->setType(DclT); |
| 3769 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3770 | |
Anders Carlsson | 0ece491 | 2009-12-15 20:51:39 +0000 | [diff] [blame] | 3771 | Init = MaybeCreateCXXExprWithTemporaries(Init); |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 3772 | // Attach the initializer to the decl. |
Douglas Gregor | 838db38 | 2010-02-11 01:19:42 +0000 | [diff] [blame] | 3773 | VDecl->setInit(Init); |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 3774 | |
Eli Friedman | dd4e485 | 2009-12-20 22:29:11 +0000 | [diff] [blame] | 3775 | if (getLangOptions().CPlusPlus) { |
| 3776 | // Make sure we mark the destructor as used if necessary. |
| 3777 | QualType InitType = VDecl->getType(); |
Douglas Gregor | bd6d619 | 2010-01-05 19:06:31 +0000 | [diff] [blame] | 3778 | while (const ArrayType *Array = Context.getAsArrayType(InitType)) |
Eli Friedman | dd4e485 | 2009-12-20 22:29:11 +0000 | [diff] [blame] | 3779 | InitType = Context.getBaseElementType(Array); |
John McCall | 68c6c9a | 2010-02-02 09:10:11 +0000 | [diff] [blame] | 3780 | if (const RecordType *Record = InitType->getAs<RecordType>()) |
| 3781 | FinalizeVarWithDestructor(VDecl, Record); |
Eli Friedman | dd4e485 | 2009-12-20 22:29:11 +0000 | [diff] [blame] | 3782 | } |
| 3783 | |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 3784 | return; |
| 3785 | } |
| 3786 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3787 | void Sema::ActOnUninitializedDecl(DeclPtrTy dcl, |
Anders Carlsson | 6a75cd9 | 2009-07-11 00:34:39 +0000 | [diff] [blame] | 3788 | bool TypeContainsUndeducedAuto) { |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 3789 | Decl *RealDecl = dcl.getAs<Decl>(); |
Douglas Gregor | 27c8dc0 | 2008-10-29 00:13:59 +0000 | [diff] [blame] | 3790 | |
Argyrios Kyrtzidis | 48c2e90 | 2008-11-07 13:01:22 +0000 | [diff] [blame] | 3791 | // If there is no declaration, there was an error parsing it. Just ignore it. |
| 3792 | if (RealDecl == 0) |
| 3793 | return; |
| 3794 | |
Douglas Gregor | 27c8dc0 | 2008-10-29 00:13:59 +0000 | [diff] [blame] | 3795 | if (VarDecl *Var = dyn_cast<VarDecl>(RealDecl)) { |
| 3796 | QualType Type = Var->getType(); |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 3797 | |
Anders Carlsson | 6a75cd9 | 2009-07-11 00:34:39 +0000 | [diff] [blame] | 3798 | // C++0x [dcl.spec.auto]p3 |
| 3799 | if (TypeContainsUndeducedAuto) { |
| 3800 | Diag(Var->getLocation(), diag::err_auto_var_requires_init) |
| 3801 | << Var->getDeclName() << Type; |
| 3802 | Var->setInvalidDecl(); |
| 3803 | return; |
| 3804 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3805 | |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 3806 | switch (Var->isThisDeclarationADefinition()) { |
| 3807 | case VarDecl::Definition: |
| 3808 | if (!Var->isStaticDataMember() || !Var->getAnyInitializer()) |
| 3809 | break; |
| 3810 | |
| 3811 | // We have an out-of-line definition of a static data member |
| 3812 | // that has an in-class initializer, so we type-check this like |
| 3813 | // a declaration. |
| 3814 | // |
| 3815 | // Fall through |
| 3816 | |
| 3817 | case VarDecl::DeclarationOnly: |
| 3818 | // It's only a declaration. |
| 3819 | |
| 3820 | // Block scope. C99 6.7p7: If an identifier for an object is |
| 3821 | // declared with no linkage (C99 6.2.2p6), the type for the |
| 3822 | // object shall be complete. |
| 3823 | if (!Type->isDependentType() && Var->isBlockVarDecl() && |
| 3824 | !Var->getLinkage() && !Var->isInvalidDecl() && |
| 3825 | RequireCompleteType(Var->getLocation(), Type, |
| 3826 | diag::err_typecheck_decl_incomplete_type)) |
| 3827 | Var->setInvalidDecl(); |
| 3828 | |
| 3829 | // Make sure that the type is not abstract. |
| 3830 | if (!Type->isDependentType() && !Var->isInvalidDecl() && |
| 3831 | RequireNonAbstractType(Var->getLocation(), Type, |
| 3832 | diag::err_abstract_type_in_decl, |
| 3833 | AbstractVariableType)) |
| 3834 | Var->setInvalidDecl(); |
| 3835 | return; |
| 3836 | |
| 3837 | case VarDecl::TentativeDefinition: |
| 3838 | // File scope. C99 6.9.2p2: A declaration of an identifier for an |
| 3839 | // object that has file scope without an initializer, and without a |
| 3840 | // storage-class specifier or with the storage-class specifier "static", |
| 3841 | // constitutes a tentative definition. Note: A tentative definition with |
| 3842 | // external linkage is valid (C99 6.2.2p5). |
| 3843 | if (!Var->isInvalidDecl()) { |
| 3844 | if (const IncompleteArrayType *ArrayT |
| 3845 | = Context.getAsIncompleteArrayType(Type)) { |
| 3846 | if (RequireCompleteType(Var->getLocation(), |
| 3847 | ArrayT->getElementType(), |
| 3848 | diag::err_illegal_decl_array_incomplete_type)) |
| 3849 | Var->setInvalidDecl(); |
| 3850 | } else if (Var->getStorageClass() == VarDecl::Static) { |
| 3851 | // C99 6.9.2p3: If the declaration of an identifier for an object is |
| 3852 | // a tentative definition and has internal linkage (C99 6.2.2p3), the |
| 3853 | // declared type shall not be an incomplete type. |
| 3854 | // NOTE: code such as the following |
| 3855 | // static struct s; |
| 3856 | // struct s { int a; }; |
| 3857 | // is accepted by gcc. Hence here we issue a warning instead of |
| 3858 | // an error and we do not invalidate the static declaration. |
| 3859 | // NOTE: to avoid multiple warnings, only check the first declaration. |
| 3860 | if (Var->getPreviousDeclaration() == 0) |
| 3861 | RequireCompleteType(Var->getLocation(), Type, |
| 3862 | diag::ext_typecheck_decl_incomplete_type); |
| 3863 | } |
| 3864 | } |
| 3865 | |
| 3866 | // Record the tentative definition; we're done. |
| 3867 | if (!Var->isInvalidDecl()) |
| 3868 | TentativeDefinitions.push_back(Var); |
| 3869 | return; |
| 3870 | } |
| 3871 | |
| 3872 | // Provide a specific diagnostic for uninitialized variable |
| 3873 | // definitions with incomplete array type. |
| 3874 | if (Type->isIncompleteArrayType()) { |
Sebastian Redl | 6e82475 | 2009-11-05 19:47:47 +0000 | [diff] [blame] | 3875 | Diag(Var->getLocation(), |
| 3876 | diag::err_typecheck_incomplete_array_needs_initializer); |
| 3877 | Var->setInvalidDecl(); |
| 3878 | return; |
| 3879 | } |
| 3880 | |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 3881 | // Provide a specific diagnostic for uninitialized variable |
| 3882 | // definitions with reference type. |
| 3883 | if (Type->isReferenceType()) { |
| 3884 | Diag(Var->getLocation(), diag::err_reference_var_requires_init) |
| 3885 | << Var->getDeclName() |
| 3886 | << SourceRange(Var->getLocation(), Var->getLocation()); |
| 3887 | Var->setInvalidDecl(); |
| 3888 | return; |
| 3889 | } |
| 3890 | |
| 3891 | // Do not attempt to type-check the default initializer for a |
| 3892 | // variable with dependent type. |
| 3893 | if (Type->isDependentType()) |
Douglas Gregor | 251b4ff | 2009-10-08 07:24:58 +0000 | [diff] [blame] | 3894 | return; |
Douglas Gregor | 39da0b8 | 2009-09-09 23:08:42 +0000 | [diff] [blame] | 3895 | |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 3896 | if (Var->isInvalidDecl()) |
| 3897 | return; |
Douglas Gregor | 1ab537b | 2009-12-03 18:33:45 +0000 | [diff] [blame] | 3898 | |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 3899 | if (RequireCompleteType(Var->getLocation(), |
| 3900 | Context.getBaseElementType(Type), |
| 3901 | diag::err_typecheck_decl_incomplete_type)) { |
| 3902 | Var->setInvalidDecl(); |
| 3903 | return; |
Douglas Gregor | 18fe568 | 2008-11-03 20:45:27 +0000 | [diff] [blame] | 3904 | } |
Douglas Gregor | 27c8dc0 | 2008-10-29 00:13:59 +0000 | [diff] [blame] | 3905 | |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 3906 | // The variable can not have an abstract class type. |
| 3907 | if (RequireNonAbstractType(Var->getLocation(), Type, |
| 3908 | diag::err_abstract_type_in_decl, |
| 3909 | AbstractVariableType)) { |
| 3910 | Var->setInvalidDecl(); |
| 3911 | return; |
| 3912 | } |
| 3913 | |
Douglas Gregor | 516a6bc | 2010-03-08 02:45:10 +0000 | [diff] [blame] | 3914 | const RecordType *Record |
| 3915 | = Context.getBaseElementType(Type)->getAs<RecordType>(); |
| 3916 | if (Record && getLangOptions().CPlusPlus && !getLangOptions().CPlusPlus0x && |
| 3917 | cast<CXXRecordDecl>(Record->getDecl())->isPOD()) { |
| 3918 | // C++03 [dcl.init]p9: |
| 3919 | // If no initializer is specified for an object, and the |
| 3920 | // object is of (possibly cv-qualified) non-POD class type (or |
| 3921 | // array thereof), the object shall be default-initialized; if |
| 3922 | // the object is of const-qualified type, the underlying class |
| 3923 | // type shall have a user-declared default |
| 3924 | // constructor. Otherwise, if no initializer is specified for |
| 3925 | // a non- static object, the object and its subobjects, if |
| 3926 | // any, have an indeterminate initial value); if the object |
| 3927 | // or any of its subobjects are of const-qualified type, the |
| 3928 | // program is ill-formed. |
| 3929 | // FIXME: DPG thinks it is very fishy that C++0x disables this. |
| 3930 | } else { |
| 3931 | InitializedEntity Entity = InitializedEntity::InitializeVariable(Var); |
| 3932 | InitializationKind Kind |
| 3933 | = InitializationKind::CreateDefault(Var->getLocation()); |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 3934 | |
Douglas Gregor | 516a6bc | 2010-03-08 02:45:10 +0000 | [diff] [blame] | 3935 | InitializationSequence InitSeq(*this, Entity, Kind, 0, 0); |
| 3936 | OwningExprResult Init = InitSeq.Perform(*this, Entity, Kind, |
| 3937 | MultiExprArg(*this, 0, 0)); |
| 3938 | if (Init.isInvalid()) |
| 3939 | Var->setInvalidDecl(); |
| 3940 | else if (Init.get()) |
Douglas Gregor | 838db38 | 2010-02-11 01:19:42 +0000 | [diff] [blame] | 3941 | Var->setInit(MaybeCreateCXXExprWithTemporaries(Init.takeAs<Expr>())); |
Douglas Gregor | 60c93c9 | 2010-02-09 07:26:29 +0000 | [diff] [blame] | 3942 | } |
Douglas Gregor | 516a6bc | 2010-03-08 02:45:10 +0000 | [diff] [blame] | 3943 | |
| 3944 | if (!Var->isInvalidDecl() && getLangOptions().CPlusPlus && Record) |
| 3945 | FinalizeVarWithDestructor(Var, Record); |
Douglas Gregor | 27c8dc0 | 2008-10-29 00:13:59 +0000 | [diff] [blame] | 3946 | } |
| 3947 | } |
| 3948 | |
Eli Friedman | c1dc653 | 2009-05-29 01:49:24 +0000 | [diff] [blame] | 3949 | Sema::DeclGroupPtrTy Sema::FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, |
| 3950 | DeclPtrTy *Group, |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 3951 | unsigned NumDecls) { |
| 3952 | llvm::SmallVector<Decl*, 8> Decls; |
Eli Friedman | c1dc653 | 2009-05-29 01:49:24 +0000 | [diff] [blame] | 3953 | |
| 3954 | if (DS.isTypeSpecOwned()) |
| 3955 | Decls.push_back((Decl*)DS.getTypeRep()); |
| 3956 | |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 3957 | for (unsigned i = 0; i != NumDecls; ++i) |
| 3958 | if (Decl *D = Group[i].getAs<Decl>()) |
| 3959 | Decls.push_back(D); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3960 | |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 3961 | return DeclGroupPtrTy::make(DeclGroupRef::Create(Context, |
Jay Foad | beaaccd | 2009-05-21 09:52:38 +0000 | [diff] [blame] | 3962 | Decls.data(), Decls.size())); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3963 | } |
Steve Naroff | e1223f7 | 2007-08-28 03:03:08 +0000 | [diff] [blame] | 3964 | |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 3965 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3966 | /// ActOnParamDeclarator - Called from Parser::ParseFunctionDeclarator() |
| 3967 | /// to introduce parameters into function prototype scope. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3968 | Sema::DeclPtrTy |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3969 | Sema::ActOnParamDeclarator(Scope *S, Declarator &D) { |
Chris Lattner | 985abd9 | 2008-06-26 06:49:43 +0000 | [diff] [blame] | 3970 | const DeclSpec &DS = D.getDeclSpec(); |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 3971 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3972 | // Verify C99 6.7.5.3p2: The only SCS allowed is 'register'. |
Daniel Dunbar | 33ad012 | 2008-09-03 21:54:21 +0000 | [diff] [blame] | 3973 | VarDecl::StorageClass StorageClass = VarDecl::None; |
| 3974 | if (DS.getStorageClassSpec() == DeclSpec::SCS_register) { |
| 3975 | StorageClass = VarDecl::Register; |
| 3976 | } else if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified) { |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3977 | Diag(DS.getStorageClassSpecLoc(), |
| 3978 | diag::err_invalid_storage_class_in_func_decl); |
Chris Lattner | 985abd9 | 2008-06-26 06:49:43 +0000 | [diff] [blame] | 3979 | D.getMutableDeclSpec().ClearStorageClassSpecs(); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3980 | } |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 3981 | |
| 3982 | if (D.getDeclSpec().isThreadSpecified()) |
| 3983 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_invalid_thread); |
| 3984 | |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 3985 | DiagnoseFunctionSpecifiers(D); |
| 3986 | |
Douglas Gregor | 6d6eb57 | 2008-05-07 04:49:29 +0000 | [diff] [blame] | 3987 | // Check that there are no default arguments inside the type of this |
| 3988 | // parameter (C++ only). |
| 3989 | if (getLangOptions().CPlusPlus) |
| 3990 | CheckExtraCXXDefaultArguments(D); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3991 | |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 3992 | TypeSourceInfo *TInfo = 0; |
Douglas Gregor | 402abb5 | 2009-05-28 23:31:59 +0000 | [diff] [blame] | 3993 | TagDecl *OwnedDecl = 0; |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 3994 | QualType parmDeclType = GetTypeForDeclarator(D, S, &TInfo, &OwnedDecl); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 3995 | |
Douglas Gregor | 402abb5 | 2009-05-28 23:31:59 +0000 | [diff] [blame] | 3996 | if (getLangOptions().CPlusPlus && OwnedDecl && OwnedDecl->isDefinition()) { |
| 3997 | // C++ [dcl.fct]p6: |
| 3998 | // Types shall not be defined in return or parameter types. |
| 3999 | Diag(OwnedDecl->getLocation(), diag::err_type_defined_in_param_type) |
| 4000 | << Context.getTypeDeclType(OwnedDecl); |
| 4001 | } |
| 4002 | |
Chris Lattner | d84aac1 | 2010-02-22 00:40:25 +0000 | [diff] [blame] | 4003 | // Check for redeclaration of parameters, e.g. int foo(int x, int x); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 4004 | IdentifierInfo *II = D.getIdentifier(); |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 4005 | if (II) { |
John McCall | 10f2873 | 2010-03-18 06:42:38 +0000 | [diff] [blame] | 4006 | LookupResult R(*this, II, D.getIdentifierLoc(), LookupOrdinaryName, |
| 4007 | ForRedeclaration); |
| 4008 | LookupName(R, S); |
| 4009 | if (R.isSingleResult()) { |
| 4010 | NamedDecl *PrevDecl = R.getFoundDecl(); |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 4011 | if (PrevDecl->isTemplateParameter()) { |
| 4012 | // Maybe we will complain about the shadowed template parameter. |
| 4013 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl); |
| 4014 | // Just pretend that we didn't see the previous declaration. |
| 4015 | PrevDecl = 0; |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4016 | } else if (S->isDeclScope(DeclPtrTy::make(PrevDecl))) { |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 4017 | Diag(D.getIdentifierLoc(), diag::err_param_redefinition) << II; |
Chris Lattner | d84aac1 | 2010-02-22 00:40:25 +0000 | [diff] [blame] | 4018 | Diag(PrevDecl->getLocation(), diag::note_previous_declaration); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 4019 | |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 4020 | // Recover by removing the name |
| 4021 | II = 0; |
| 4022 | D.SetIdentifier(0, D.getIdentifierLoc()); |
Fariborz Jahanian | 9a66c30 | 2010-02-12 21:53:14 +0000 | [diff] [blame] | 4023 | D.setInvalidType(true); |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 4024 | } |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 4025 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4026 | } |
Steve Naroff | 6a9f3e3 | 2007-08-07 22:44:21 +0000 | [diff] [blame] | 4027 | |
Anders Carlsson | 11f21a0 | 2009-03-23 19:10:31 +0000 | [diff] [blame] | 4028 | // Parameters can not be abstract class types. |
Anders Carlsson | 8211eff | 2009-03-24 01:19:16 +0000 | [diff] [blame] | 4029 | // For record types, this is done by the AbstractClassUsageDiagnoser once |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4030 | // the class has been completely parsed. |
| 4031 | if (!CurContext->isRecord() && |
| 4032 | RequireNonAbstractType(D.getIdentifierLoc(), parmDeclType, |
Anders Carlsson | 11f21a0 | 2009-03-23 19:10:31 +0000 | [diff] [blame] | 4033 | diag::err_abstract_type_in_decl, |
Anders Carlsson | 8211eff | 2009-03-24 01:19:16 +0000 | [diff] [blame] | 4034 | AbstractParamType)) |
Anders Carlsson | 11f21a0 | 2009-03-23 19:10:31 +0000 | [diff] [blame] | 4035 | D.setInvalidType(true); |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 4036 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4037 | QualType T = adjustParameterType(parmDeclType); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4038 | |
John McCall | 7a9813c | 2010-01-22 00:28:27 +0000 | [diff] [blame] | 4039 | // Temporarily put parameter variables in the translation unit, not |
| 4040 | // the enclosing context. This prevents them from accidentally |
| 4041 | // looking like class members in C++. |
| 4042 | DeclContext *DC = Context.getTranslationUnitDecl(); |
| 4043 | |
John McCall | 58e4677 | 2009-10-23 21:48:59 +0000 | [diff] [blame] | 4044 | ParmVarDecl *New |
John McCall | 7a9813c | 2010-01-22 00:28:27 +0000 | [diff] [blame] | 4045 | = ParmVarDecl::Create(Context, DC, D.getIdentifierLoc(), II, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 4046 | T, TInfo, StorageClass, 0); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4047 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 4048 | if (D.isInvalidType()) |
Steve Naroff | 53a3234 | 2007-08-28 18:45:29 +0000 | [diff] [blame] | 4049 | New->setInvalidDecl(); |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 4050 | |
Steve Naroff | ccef371 | 2009-02-20 22:59:16 +0000 | [diff] [blame] | 4051 | // Parameter declarators cannot be interface types. All ObjC objects are |
| 4052 | // passed by reference. |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 4053 | if (T->isObjCInterfaceType()) { |
Chris Lattner | 2dd979f | 2009-04-11 19:08:56 +0000 | [diff] [blame] | 4054 | Diag(D.getIdentifierLoc(), |
| 4055 | diag::err_object_cannot_be_passed_returned_by_value) << 1 << T; |
Steve Naroff | ccef371 | 2009-02-20 22:59:16 +0000 | [diff] [blame] | 4056 | New->setInvalidDecl(); |
| 4057 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4058 | |
Chris Lattner | f97e8fa | 2009-04-11 19:34:56 +0000 | [diff] [blame] | 4059 | // Parameter declarators cannot be qualified (C++ [dcl.meaning]p1). |
| 4060 | if (D.getCXXScopeSpec().isSet()) { |
| 4061 | Diag(D.getIdentifierLoc(), diag::err_qualified_param_declarator) |
| 4062 | << D.getCXXScopeSpec().getRange(); |
| 4063 | New->setInvalidDecl(); |
| 4064 | } |
Tanya Lattner | 27a84d0 | 2009-09-30 20:47:43 +0000 | [diff] [blame] | 4065 | |
| 4066 | // ISO/IEC TR 18037 S6.7.3: "The type of an object with automatic storage |
| 4067 | // duration shall not be qualified by an address-space qualifier." |
| 4068 | // Since all parameters have automatic store duration, they can not have |
| 4069 | // an address space. |
| 4070 | if (T.getAddressSpace() != 0) { |
| 4071 | Diag(D.getIdentifierLoc(), |
| 4072 | diag::err_arg_with_address_space); |
| 4073 | New->setInvalidDecl(); |
| 4074 | } |
| 4075 | |
| 4076 | |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 4077 | // Add the parameter declaration into this scope. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4078 | S->AddDecl(DeclPtrTy::make(New)); |
Argyrios Kyrtzidis | 87f3ff0 | 2008-04-12 00:47:19 +0000 | [diff] [blame] | 4079 | if (II) |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 4080 | IdResolver.AddDecl(New); |
Nate Begeman | b7894b5 | 2008-02-17 21:20:31 +0000 | [diff] [blame] | 4081 | |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 4082 | ProcessDeclAttributes(S, New, D); |
Mike Stump | ea000bf | 2009-04-30 00:19:40 +0000 | [diff] [blame] | 4083 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 4084 | if (New->hasAttr<BlocksAttr>()) { |
Mike Stump | ea000bf | 2009-04-30 00:19:40 +0000 | [diff] [blame] | 4085 | Diag(New->getLocation(), diag::err_block_on_nonlocal); |
| 4086 | } |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4087 | return DeclPtrTy::make(New); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4088 | } |
Fariborz Jahanian | 306d68f | 2007-11-08 23:49:49 +0000 | [diff] [blame] | 4089 | |
Fariborz Jahanian | 2f764f1 | 2010-02-03 00:01:43 +0000 | [diff] [blame] | 4090 | void Sema::ActOnObjCCatchParam(DeclPtrTy D) { |
| 4091 | ParmVarDecl *Param = cast<ParmVarDecl>(D.getAs<Decl>()); |
Fariborz Jahanian | d219a3a | 2010-02-03 00:32:51 +0000 | [diff] [blame] | 4092 | Param->setDeclContext(CurContext); |
Fariborz Jahanian | 2f764f1 | 2010-02-03 00:01:43 +0000 | [diff] [blame] | 4093 | } |
| 4094 | |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 4095 | void Sema::ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, |
| 4096 | SourceLocation LocAfterDecls) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4097 | assert(D.getTypeObject(0).Kind == DeclaratorChunk::Function && |
| 4098 | "Not a function declarator!"); |
| 4099 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(0).Fun; |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 4100 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4101 | // Verify 6.9.1p6: 'every identifier in the identifier list shall be declared' |
| 4102 | // for a K&R function. |
| 4103 | if (!FTI.hasPrototype) { |
Douglas Gregor | 2610348 | 2009-04-02 03:14:12 +0000 | [diff] [blame] | 4104 | for (int i = FTI.NumArgs; i != 0; /* decrement in loop */) { |
| 4105 | --i; |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 4106 | if (FTI.ArgInfo[i].Param == 0) { |
Daniel Dunbar | 5ffe14c | 2009-10-18 20:26:27 +0000 | [diff] [blame] | 4107 | llvm::SmallString<256> Code; |
| 4108 | llvm::raw_svector_ostream(Code) << " int " |
Daniel Dunbar | 01eb9b9 | 2009-10-18 21:17:35 +0000 | [diff] [blame] | 4109 | << FTI.ArgInfo[i].Ident->getName() |
Daniel Dunbar | 5ffe14c | 2009-10-18 20:26:27 +0000 | [diff] [blame] | 4110 | << ";\n"; |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 4111 | Diag(FTI.ArgInfo[i].IdentLoc, diag::ext_param_not_declared) |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 4112 | << FTI.ArgInfo[i].Ident |
Daniel Dunbar | 5ffe14c | 2009-10-18 20:26:27 +0000 | [diff] [blame] | 4113 | << CodeModificationHint::CreateInsertion(LocAfterDecls, Code.str()); |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 4114 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4115 | // Implicitly declare the argument as type 'int' for lack of a better |
| 4116 | // type. |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 4117 | DeclSpec DS; |
| 4118 | const char* PrevSpec; // unused |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 4119 | unsigned DiagID; // unused |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4120 | DS.SetTypeSpecType(DeclSpec::TST_int, FTI.ArgInfo[i].IdentLoc, |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 4121 | PrevSpec, DiagID); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 4122 | Declarator ParamD(DS, Declarator::KNRTypeListContext); |
| 4123 | ParamD.SetIdentifier(FTI.ArgInfo[i].Ident, FTI.ArgInfo[i].IdentLoc); |
Douglas Gregor | be109b3 | 2009-01-23 16:23:13 +0000 | [diff] [blame] | 4124 | FTI.ArgInfo[i].Param = ActOnParamDeclarator(S, ParamD); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4125 | } |
| 4126 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4127 | } |
Douglas Gregor | be109b3 | 2009-01-23 16:23:13 +0000 | [diff] [blame] | 4128 | } |
| 4129 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4130 | Sema::DeclPtrTy Sema::ActOnStartOfFunctionDef(Scope *FnBodyScope, |
| 4131 | Declarator &D) { |
Douglas Gregor | be109b3 | 2009-01-23 16:23:13 +0000 | [diff] [blame] | 4132 | assert(getCurFunctionDecl() == 0 && "Function parsing confused"); |
| 4133 | assert(D.getTypeObject(0).Kind == DeclaratorChunk::Function && |
| 4134 | "Not a function declarator!"); |
| 4135 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(0).Fun; |
| 4136 | |
| 4137 | if (FTI.hasPrototype) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4138 | // FIXME: Diagnose arguments without names in C. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4139 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4140 | |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 4141 | Scope *ParentScope = FnBodyScope->getParent(); |
Steve Naroff | adbbd0c | 2008-01-14 20:51:29 +0000 | [diff] [blame] | 4142 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4143 | DeclPtrTy DP = HandleDeclarator(ParentScope, D, |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 4144 | MultiTemplateParamsArg(*this), |
| 4145 | /*IsFunctionDefinition=*/true); |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 4146 | return ActOnStartOfFunctionDef(FnBodyScope, DP); |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 4147 | } |
| 4148 | |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 4149 | static bool ShouldWarnAboutMissingPrototype(const FunctionDecl *FD) { |
| 4150 | // Don't warn about invalid declarations. |
| 4151 | if (FD->isInvalidDecl()) |
| 4152 | return false; |
Anders Carlsson | 63fb673 | 2009-12-09 03:44:46 +0000 | [diff] [blame] | 4153 | |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 4154 | // Or declarations that aren't global. |
| 4155 | if (!FD->isGlobal()) |
| 4156 | return false; |
Anders Carlsson | 63fb673 | 2009-12-09 03:44:46 +0000 | [diff] [blame] | 4157 | |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 4158 | // Don't warn about C++ member functions. |
| 4159 | if (isa<CXXMethodDecl>(FD)) |
| 4160 | return false; |
Anders Carlsson | 63fb673 | 2009-12-09 03:44:46 +0000 | [diff] [blame] | 4161 | |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 4162 | // Don't warn about 'main'. |
| 4163 | if (FD->isMain()) |
| 4164 | return false; |
Anders Carlsson | 63fb673 | 2009-12-09 03:44:46 +0000 | [diff] [blame] | 4165 | |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 4166 | // Don't warn about inline functions. |
| 4167 | if (FD->isInlineSpecified()) |
| 4168 | return false; |
Anders Carlsson | 63fb673 | 2009-12-09 03:44:46 +0000 | [diff] [blame] | 4169 | |
| 4170 | // Don't warn about function templates. |
| 4171 | if (FD->getDescribedFunctionTemplate()) |
| 4172 | return false; |
| 4173 | |
| 4174 | // Don't warn about function template specializations. |
| 4175 | if (FD->isFunctionTemplateSpecialization()) |
| 4176 | return false; |
| 4177 | |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 4178 | bool MissingPrototype = true; |
| 4179 | for (const FunctionDecl *Prev = FD->getPreviousDeclaration(); |
| 4180 | Prev; Prev = Prev->getPreviousDeclaration()) { |
| 4181 | // Ignore any declarations that occur in function or method |
| 4182 | // scope, because they aren't visible from the header. |
| 4183 | if (Prev->getDeclContext()->isFunctionOrMethod()) |
| 4184 | continue; |
| 4185 | |
| 4186 | MissingPrototype = !Prev->getType()->isFunctionProtoType(); |
| 4187 | break; |
| 4188 | } |
| 4189 | |
| 4190 | return MissingPrototype; |
| 4191 | } |
| 4192 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4193 | Sema::DeclPtrTy Sema::ActOnStartOfFunctionDef(Scope *FnBodyScope, DeclPtrTy D) { |
Anders Carlsson | 0ebb6d3 | 2009-10-29 15:46:07 +0000 | [diff] [blame] | 4194 | // Clear the last template instantiation error context. |
| 4195 | LastTemplateInstantiationErrorContext = ActiveTemplateInstantiation(); |
| 4196 | |
Douglas Gregor | 52591bf | 2009-06-24 00:54:41 +0000 | [diff] [blame] | 4197 | if (!D) |
| 4198 | return D; |
Douglas Gregor | d83d040 | 2009-08-22 00:34:47 +0000 | [diff] [blame] | 4199 | FunctionDecl *FD = 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4200 | |
| 4201 | if (FunctionTemplateDecl *FunTmpl |
Douglas Gregor | d83d040 | 2009-08-22 00:34:47 +0000 | [diff] [blame] | 4202 | = dyn_cast<FunctionTemplateDecl>(D.getAs<Decl>())) |
| 4203 | FD = FunTmpl->getTemplatedDecl(); |
| 4204 | else |
| 4205 | FD = cast<FunctionDecl>(D.getAs<Decl>()); |
Douglas Gregor | 6fc17ff | 2008-10-29 15:10:40 +0000 | [diff] [blame] | 4206 | |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 4207 | // Enter a new function scope |
| 4208 | PushFunctionScope(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4209 | |
Douglas Gregor | 6fc17ff | 2008-10-29 15:10:40 +0000 | [diff] [blame] | 4210 | // See if this is a redefinition. |
Charles Davis | f3f8d2a | 2010-02-18 02:00:42 +0000 | [diff] [blame] | 4211 | // But don't complain if we're in GNU89 mode and the previous definition |
| 4212 | // was an extern inline function. |
Douglas Gregor | 6fc17ff | 2008-10-29 15:10:40 +0000 | [diff] [blame] | 4213 | const FunctionDecl *Definition; |
Charles Davis | f3f8d2a | 2010-02-18 02:00:42 +0000 | [diff] [blame] | 4214 | if (FD->getBody(Definition) && |
| 4215 | !canRedefineFunction(Definition, getLangOptions())) { |
Chris Lattner | 08631c5 | 2008-11-23 21:45:46 +0000 | [diff] [blame] | 4216 | Diag(FD->getLocation(), diag::err_redefinition) << FD->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 4217 | Diag(Definition->getLocation(), diag::note_previous_definition); |
Douglas Gregor | 6fc17ff | 2008-10-29 15:10:40 +0000 | [diff] [blame] | 4218 | } |
| 4219 | |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 4220 | // Builtin functions cannot be defined. |
Douglas Gregor | 7814e6d | 2009-09-12 00:22:50 +0000 | [diff] [blame] | 4221 | if (unsigned BuiltinID = FD->getBuiltinID()) { |
Douglas Gregor | 655753a | 2009-02-17 16:03:01 +0000 | [diff] [blame] | 4222 | if (!Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) { |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 4223 | Diag(FD->getLocation(), diag::err_builtin_definition) << FD; |
Douglas Gregor | 655753a | 2009-02-17 16:03:01 +0000 | [diff] [blame] | 4224 | FD->setInvalidDecl(); |
| 4225 | } |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 4226 | } |
| 4227 | |
Eli Friedman | 7f0f5dc | 2009-03-04 07:30:59 +0000 | [diff] [blame] | 4228 | // The return type of a function definition must be complete |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 4229 | // (C99 6.9.1p3, C++ [dcl.fct]p6). |
| 4230 | QualType ResultType = FD->getResultType(); |
| 4231 | if (!ResultType->isDependentType() && !ResultType->isVoidType() && |
Chris Lattner | 65e6a09 | 2009-04-29 05:12:23 +0000 | [diff] [blame] | 4232 | !FD->isInvalidDecl() && |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 4233 | RequireCompleteType(FD->getLocation(), ResultType, |
| 4234 | diag::err_func_def_incomplete_result)) |
Eli Friedman | 7f0f5dc | 2009-03-04 07:30:59 +0000 | [diff] [blame] | 4235 | FD->setInvalidDecl(); |
Eli Friedman | 7f0f5dc | 2009-03-04 07:30:59 +0000 | [diff] [blame] | 4236 | |
Douglas Gregor | 8499f3f | 2009-03-31 16:35:03 +0000 | [diff] [blame] | 4237 | // GNU warning -Wmissing-prototypes: |
| 4238 | // Warn if a global function is defined without a previous |
| 4239 | // prototype declaration. This warning is issued even if the |
| 4240 | // definition itself provides a prototype. The aim is to detect |
| 4241 | // global functions that fail to be declared in header files. |
Anders Carlsson | 9f89dd7 | 2009-12-09 03:30:09 +0000 | [diff] [blame] | 4242 | if (ShouldWarnAboutMissingPrototype(FD)) |
| 4243 | Diag(FD->getLocation(), diag::warn_missing_prototype) << FD; |
Douglas Gregor | 8499f3f | 2009-03-31 16:35:03 +0000 | [diff] [blame] | 4244 | |
Douglas Gregor | e2c31ff | 2009-05-15 17:59:04 +0000 | [diff] [blame] | 4245 | if (FnBodyScope) |
| 4246 | PushDeclContext(FnBodyScope, FD); |
Anton Korobeynikov | 2f40270 | 2008-12-26 00:52:02 +0000 | [diff] [blame] | 4247 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 4248 | // Check the validity of our function parameters |
| 4249 | CheckParmsForFunctionDef(FD); |
| 4250 | |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 4251 | bool ShouldCheckShadow = |
| 4252 | Diags.getDiagnosticLevel(diag::warn_decl_shadow) != Diagnostic::Ignored; |
| 4253 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 4254 | // Introduce our parameters into the function scope |
| 4255 | for (unsigned p = 0, NumParams = FD->getNumParams(); p < NumParams; ++p) { |
| 4256 | ParmVarDecl *Param = FD->getParamDecl(p); |
Douglas Gregor | a8cc8ce | 2009-01-09 18:51:29 +0000 | [diff] [blame] | 4257 | Param->setOwningFunction(FD); |
| 4258 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 4259 | // If this has an identifier, add it to the scope stack. |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 4260 | if (Param->getIdentifier() && FnBodyScope) { |
| 4261 | if (ShouldCheckShadow) |
| 4262 | CheckShadow(FnBodyScope, Param); |
| 4263 | |
Argyrios Kyrtzidis | 87f3ff0 | 2008-04-12 00:47:19 +0000 | [diff] [blame] | 4264 | PushOnScopeChains(Param, FnBodyScope); |
John McCall | 053f4bd | 2010-03-22 09:20:08 +0000 | [diff] [blame] | 4265 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4266 | } |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 4267 | |
Anton Korobeynikov | 2f40270 | 2008-12-26 00:52:02 +0000 | [diff] [blame] | 4268 | // Checking attributes of current function definition |
| 4269 | // dllimport attribute. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4270 | if (FD->getAttr<DLLImportAttr>() && |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 4271 | (!FD->getAttr<DLLExportAttr>())) { |
Anton Korobeynikov | 2f40270 | 2008-12-26 00:52:02 +0000 | [diff] [blame] | 4272 | // dllimport attribute cannot be applied to definition. |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 4273 | if (!(FD->getAttr<DLLImportAttr>())->isInherited()) { |
Anton Korobeynikov | 2f40270 | 2008-12-26 00:52:02 +0000 | [diff] [blame] | 4274 | Diag(FD->getLocation(), |
| 4275 | diag::err_attribute_can_be_applied_only_to_symbol_declaration) |
| 4276 | << "dllimport"; |
| 4277 | FD->setInvalidDecl(); |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4278 | return DeclPtrTy::make(FD); |
Ted Kremenek | 12911a8 | 2010-02-21 05:12:53 +0000 | [diff] [blame] | 4279 | } |
| 4280 | |
| 4281 | // Visual C++ appears to not think this is an issue, so only issue |
| 4282 | // a warning when Microsoft extensions are disabled. |
| 4283 | if (!LangOpts.Microsoft) { |
Anton Korobeynikov | 2f40270 | 2008-12-26 00:52:02 +0000 | [diff] [blame] | 4284 | // If a symbol previously declared dllimport is later defined, the |
| 4285 | // attribute is ignored in subsequent references, and a warning is |
| 4286 | // emitted. |
| 4287 | Diag(FD->getLocation(), |
| 4288 | diag::warn_redeclaration_without_attribute_prev_attribute_ignored) |
| 4289 | << FD->getNameAsCString() << "dllimport"; |
| 4290 | } |
| 4291 | } |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4292 | return DeclPtrTy::make(FD); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4293 | } |
| 4294 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4295 | Sema::DeclPtrTy Sema::ActOnFinishFunctionBody(DeclPtrTy D, StmtArg BodyArg) { |
Douglas Gregor | e2c31ff | 2009-05-15 17:59:04 +0000 | [diff] [blame] | 4296 | return ActOnFinishFunctionBody(D, move(BodyArg), false); |
| 4297 | } |
| 4298 | |
| 4299 | Sema::DeclPtrTy Sema::ActOnFinishFunctionBody(DeclPtrTy D, StmtArg BodyArg, |
| 4300 | bool IsInstantiation) { |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4301 | Decl *dcl = D.getAs<Decl>(); |
Sebastian Redl | d3a413d | 2009-04-26 20:35:05 +0000 | [diff] [blame] | 4302 | Stmt *Body = BodyArg.takeAs<Stmt>(); |
Douglas Gregor | d83d040 | 2009-08-22 00:34:47 +0000 | [diff] [blame] | 4303 | |
| 4304 | FunctionDecl *FD = 0; |
| 4305 | FunctionTemplateDecl *FunTmpl = dyn_cast_or_null<FunctionTemplateDecl>(dcl); |
| 4306 | if (FunTmpl) |
| 4307 | FD = FunTmpl->getTemplatedDecl(); |
| 4308 | else |
| 4309 | FD = dyn_cast_or_null<FunctionDecl>(dcl); |
| 4310 | |
Ted Kremenek | d064fdc | 2010-03-23 00:13:23 +0000 | [diff] [blame] | 4311 | sema::AnalysisBasedWarnings::Policy WP = AnalysisWarnings.getDefaultPolicy(); |
Ted Kremenek | dbdbaaf | 2010-03-20 21:06:02 +0000 | [diff] [blame] | 4312 | |
Douglas Gregor | d83d040 | 2009-08-22 00:34:47 +0000 | [diff] [blame] | 4313 | if (FD) { |
Chris Lattner | a5251fc | 2009-04-18 09:36:27 +0000 | [diff] [blame] | 4314 | FD->setBody(Body); |
Ted Kremenek | dbdbaaf | 2010-03-20 21:06:02 +0000 | [diff] [blame] | 4315 | if (FD->isMain()) { |
Mike Stump | 5f28a1e | 2009-07-24 02:49:01 +0000 | [diff] [blame] | 4316 | // C and C++ allow for main to automagically return 0. |
John McCall | 0cfeb63 | 2009-07-28 01:00:58 +0000 | [diff] [blame] | 4317 | // Implements C++ [basic.start.main]p5 and C99 5.1.2.2.3. |
| 4318 | FD->setHasImplicitReturnZero(true); |
Ted Kremenek | d064fdc | 2010-03-23 00:13:23 +0000 | [diff] [blame] | 4319 | WP.disableCheckFallThrough(); |
Ted Kremenek | dbdbaaf | 2010-03-20 21:06:02 +0000 | [diff] [blame] | 4320 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4321 | |
Douglas Gregor | e0762c9 | 2009-06-19 23:52:42 +0000 | [diff] [blame] | 4322 | if (!FD->isInvalidDecl()) |
| 4323 | DiagnoseUnusedParameters(FD->param_begin(), FD->param_end()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4324 | |
Anders Carlsson | d6a637f | 2009-12-07 08:24:59 +0000 | [diff] [blame] | 4325 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(FD)) |
| 4326 | MaybeMarkVirtualMembersReferenced(Method->getLocation(), Method); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4327 | |
Argyrios Kyrtzidis | 53d0ea5 | 2008-06-28 06:07:14 +0000 | [diff] [blame] | 4328 | assert(FD == getCurFunctionDecl() && "Function parsing confused"); |
Steve Naroff | 394f3f4 | 2008-07-25 17:57:26 +0000 | [diff] [blame] | 4329 | } else if (ObjCMethodDecl *MD = dyn_cast_or_null<ObjCMethodDecl>(dcl)) { |
Chris Lattner | ffed163 | 2009-02-16 19:27:54 +0000 | [diff] [blame] | 4330 | assert(MD == getCurMethodDecl() && "Method parsing confused"); |
Chris Lattner | a5251fc | 2009-04-18 09:36:27 +0000 | [diff] [blame] | 4331 | MD->setBody(Body); |
Argyrios Kyrtzidis | a2e85ad | 2009-07-18 00:33:33 +0000 | [diff] [blame] | 4332 | MD->setEndLoc(Body->getLocEnd()); |
Douglas Gregor | e0762c9 | 2009-06-19 23:52:42 +0000 | [diff] [blame] | 4333 | if (!MD->isInvalidDecl()) |
| 4334 | DiagnoseUnusedParameters(MD->param_begin(), MD->param_end()); |
Ted Kremenek | 8189cde | 2009-02-07 01:47:29 +0000 | [diff] [blame] | 4335 | } else { |
| 4336 | Body->Destroy(Context); |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4337 | return DeclPtrTy(); |
Ted Kremenek | 8189cde | 2009-02-07 01:47:29 +0000 | [diff] [blame] | 4338 | } |
Douglas Gregor | e2c31ff | 2009-05-15 17:59:04 +0000 | [diff] [blame] | 4339 | if (!IsInstantiation) |
| 4340 | PopDeclContext(); |
| 4341 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4342 | // Verify and clean out per-function state. |
Eli Friedman | 8f17b66 | 2009-02-28 05:41:13 +0000 | [diff] [blame] | 4343 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4344 | // Check goto/label use. |
Steve Naroff | caaacec | 2009-03-13 15:38:40 +0000 | [diff] [blame] | 4345 | for (llvm::DenseMap<IdentifierInfo*, LabelStmt*>::iterator |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 4346 | I = getLabelMap().begin(), E = getLabelMap().end(); I != E; ++I) { |
Chris Lattner | e32f74c | 2009-04-18 19:30:02 +0000 | [diff] [blame] | 4347 | LabelStmt *L = I->second; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4348 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4349 | // Verify that we have no forward references left. If so, there was a goto |
| 4350 | // or address of a label taken, but no definition of it. Label fwd |
| 4351 | // definitions are indicated with a null substmt. |
Chris Lattner | e32f74c | 2009-04-18 19:30:02 +0000 | [diff] [blame] | 4352 | if (L->getSubStmt() != 0) |
| 4353 | continue; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4354 | |
Chris Lattner | e32f74c | 2009-04-18 19:30:02 +0000 | [diff] [blame] | 4355 | // Emit error. |
| 4356 | Diag(L->getIdentLoc(), diag::err_undeclared_label_use) << L->getName(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4357 | |
Chris Lattner | e32f74c | 2009-04-18 19:30:02 +0000 | [diff] [blame] | 4358 | // At this point, we have gotos that use the bogus label. Stitch it into |
| 4359 | // the function body so that they aren't leaked and that the AST is well |
| 4360 | // formed. |
| 4361 | if (Body == 0) { |
| 4362 | // The whole function wasn't parsed correctly, just delete this. |
| 4363 | L->Destroy(Context); |
| 4364 | continue; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4365 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4366 | |
Chris Lattner | e32f74c | 2009-04-18 19:30:02 +0000 | [diff] [blame] | 4367 | // Otherwise, the body is valid: we want to stitch the label decl into the |
| 4368 | // function somewhere so that it is properly owned and so that the goto |
| 4369 | // has a valid target. Do this by creating a new compound stmt with the |
| 4370 | // label in it. |
Sebastian Redl | d3a413d | 2009-04-26 20:35:05 +0000 | [diff] [blame] | 4371 | |
Chris Lattner | e32f74c | 2009-04-18 19:30:02 +0000 | [diff] [blame] | 4372 | // Give the label a sub-statement. |
| 4373 | L->setSubStmt(new (Context) NullStmt(L->getIdentLoc())); |
Sebastian Redl | d3a413d | 2009-04-26 20:35:05 +0000 | [diff] [blame] | 4374 | |
| 4375 | CompoundStmt *Compound = isa<CXXTryStmt>(Body) ? |
| 4376 | cast<CXXTryStmt>(Body)->getTryBlock() : |
| 4377 | cast<CompoundStmt>(Body); |
Ted Kremenek | 4c9f709 | 2010-03-12 22:22:36 +0000 | [diff] [blame] | 4378 | llvm::SmallVector<Stmt*, 64> Elements(Compound->body_begin(), |
| 4379 | Compound->body_end()); |
Chris Lattner | e32f74c | 2009-04-18 19:30:02 +0000 | [diff] [blame] | 4380 | Elements.push_back(L); |
Ted Kremenek | 4c9f709 | 2010-03-12 22:22:36 +0000 | [diff] [blame] | 4381 | Compound->setStmts(Context, Elements.data(), Elements.size()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4382 | } |
Eli Friedman | 8f17b66 | 2009-02-28 05:41:13 +0000 | [diff] [blame] | 4383 | |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 4384 | if (Body) { |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 4385 | // C++ constructors that have function-try-blocks can't have return |
| 4386 | // statements in the handlers of that block. (C++ [except.handle]p14) |
| 4387 | // Verify this. |
| 4388 | if (FD && isa<CXXConstructorDecl>(FD) && isa<CXXTryStmt>(Body)) |
| 4389 | DiagnoseReturnInConstructorExceptionHandler(cast<CXXTryStmt>(Body)); |
| 4390 | |
Ted Kremenek | dbdbaaf | 2010-03-20 21:06:02 +0000 | [diff] [blame] | 4391 | // Verify that that gotos and switch cases don't jump into scopes illegally. |
| 4392 | // Verify that that gotos and switch cases don't jump into scopes illegally. |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 4393 | if (FunctionNeedsScopeChecking() && !hasAnyErrorsInThisFunction()) |
| 4394 | DiagnoseInvalidJumps(Body); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4395 | |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 4396 | if (CXXDestructorDecl *Destructor = dyn_cast<CXXDestructorDecl>(dcl)) |
John McCall | ef027fe | 2010-03-16 21:39:52 +0000 | [diff] [blame] | 4397 | MarkBaseAndMemberDestructorsReferenced(Destructor->getLocation(), |
| 4398 | Destructor->getParent()); |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 4399 | |
| 4400 | // If any errors have occurred, clear out any temporaries that may have |
| 4401 | // been leftover. This ensures that these temporaries won't be picked up for |
| 4402 | // deletion in some later function. |
| 4403 | if (PP.getDiagnostics().hasErrorOccurred()) |
| 4404 | ExprTemporaries.clear(); |
Ted Kremenek | dbdbaaf | 2010-03-20 21:06:02 +0000 | [diff] [blame] | 4405 | else if (!isa<FunctionTemplateDecl>(dcl)) { |
| 4406 | // Since the body is valid, issue any analysis-based warnings that are |
| 4407 | // enabled. |
| 4408 | QualType ResultType; |
| 4409 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(dcl)) { |
| 4410 | ResultType = FD->getResultType(); |
| 4411 | } |
| 4412 | else { |
| 4413 | ObjCMethodDecl *MD = cast<ObjCMethodDecl>(dcl); |
| 4414 | ResultType = MD->getResultType(); |
| 4415 | } |
Ted Kremenek | d064fdc | 2010-03-23 00:13:23 +0000 | [diff] [blame] | 4416 | AnalysisWarnings.IssueWarnings(WP, dcl); |
Ted Kremenek | dbdbaaf | 2010-03-20 21:06:02 +0000 | [diff] [blame] | 4417 | } |
| 4418 | |
Douglas Gregor | 9ea9bdb | 2010-03-01 23:15:13 +0000 | [diff] [blame] | 4419 | assert(ExprTemporaries.empty() && "Leftover temporaries in function"); |
| 4420 | } |
| 4421 | |
| 4422 | PopFunctionOrBlockScope(); |
Anders Carlsson | f8a9a79 | 2009-11-13 19:21:49 +0000 | [diff] [blame] | 4423 | |
Douglas Gregor | d5b5728 | 2009-11-15 07:07:58 +0000 | [diff] [blame] | 4424 | // If any errors have occurred, clear out any temporaries that may have |
| 4425 | // been leftover. This ensures that these temporaries won't be picked up for |
| 4426 | // deletion in some later function. |
Chris Lattner | 6d97e5e | 2010-03-01 20:59:53 +0000 | [diff] [blame] | 4427 | if (getDiagnostics().hasErrorOccurred()) |
Douglas Gregor | d5b5728 | 2009-11-15 07:07:58 +0000 | [diff] [blame] | 4428 | ExprTemporaries.clear(); |
| 4429 | |
Steve Naroff | d6d054d | 2007-11-11 23:20:51 +0000 | [diff] [blame] | 4430 | return D; |
Fariborz Jahanian | 60fbca0 | 2007-11-10 16:31:34 +0000 | [diff] [blame] | 4431 | } |
| 4432 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4433 | /// ImplicitlyDefineFunction - An undeclared identifier was used in a function |
| 4434 | /// 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] | 4435 | NamedDecl *Sema::ImplicitlyDefineFunction(SourceLocation Loc, |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 4436 | IdentifierInfo &II, Scope *S) { |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 4437 | // Before we produce a declaration for an implicitly defined |
| 4438 | // function, see whether there was a locally-scoped declaration of |
| 4439 | // this name as a function or variable. If so, use that |
| 4440 | // (non-visible) declaration, and complain about it. |
| 4441 | llvm::DenseMap<DeclarationName, NamedDecl *>::iterator Pos |
| 4442 | = LocallyScopedExternalDecls.find(&II); |
| 4443 | if (Pos != LocallyScopedExternalDecls.end()) { |
| 4444 | Diag(Loc, diag::warn_use_out_of_scope_declaration) << Pos->second; |
| 4445 | Diag(Pos->second->getLocation(), diag::note_previous_declaration); |
| 4446 | return Pos->second; |
| 4447 | } |
| 4448 | |
Chris Lattner | 37d1084 | 2008-05-05 21:18:06 +0000 | [diff] [blame] | 4449 | // Extension in C99. Legal in C90, but warn about it. |
Daniel Dunbar | 01eb9b9 | 2009-10-18 21:17:35 +0000 | [diff] [blame] | 4450 | if (II.getName().startswith("__builtin_")) |
Douglas Gregor | 9a8c9a2 | 2009-09-28 21:14:19 +0000 | [diff] [blame] | 4451 | Diag(Loc, diag::warn_builtin_unknown) << &II; |
| 4452 | else if (getLangOptions().C99) |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 4453 | Diag(Loc, diag::ext_implicit_function_decl) << &II; |
Chris Lattner | 37d1084 | 2008-05-05 21:18:06 +0000 | [diff] [blame] | 4454 | else |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 4455 | Diag(Loc, diag::warn_implicit_function_decl) << &II; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4456 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4457 | // Set a Declarator for the implicit definition: int foo(); |
| 4458 | const char *Dummy; |
| 4459 | DeclSpec DS; |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 4460 | unsigned DiagID; |
| 4461 | bool Error = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, Dummy, DiagID); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4462 | Error = Error; // Silence warning. |
| 4463 | assert(!Error && "Error setting up implicit decl!"); |
| 4464 | Declarator D(DS, Declarator::BlockContext); |
Sebastian Redl | 7dc8134 | 2009-04-29 17:30:04 +0000 | [diff] [blame] | 4465 | D.AddTypeInfo(DeclaratorChunk::getFunction(false, false, SourceLocation(), 0, |
Sebastian Redl | 3cc9726 | 2009-05-31 11:47:27 +0000 | [diff] [blame] | 4466 | 0, 0, false, SourceLocation(), |
Argyrios Kyrtzidis | 82bf010 | 2009-08-19 23:14:54 +0000 | [diff] [blame] | 4467 | false, 0,0,0, Loc, Loc, D), |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 4468 | SourceLocation()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4469 | D.SetIdentifier(&II, Loc); |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 4470 | |
Argyrios Kyrtzidis | 93213bb | 2008-05-01 21:04:16 +0000 | [diff] [blame] | 4471 | // Insert this function into translation-unit scope. |
| 4472 | |
| 4473 | DeclContext *PrevDC = CurContext; |
| 4474 | CurContext = Context.getTranslationUnitDecl(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4475 | |
| 4476 | FunctionDecl *FD = |
Douglas Gregor | 2e01cda | 2009-06-23 21:43:56 +0000 | [diff] [blame] | 4477 | dyn_cast<FunctionDecl>(ActOnDeclarator(TUScope, D).getAs<Decl>()); |
Steve Naroff | e2ef815 | 2008-04-04 14:32:09 +0000 | [diff] [blame] | 4478 | FD->setImplicit(); |
Argyrios Kyrtzidis | 93213bb | 2008-05-01 21:04:16 +0000 | [diff] [blame] | 4479 | |
| 4480 | CurContext = PrevDC; |
| 4481 | |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 4482 | AddKnownFunctionAttributes(FD); |
| 4483 | |
Steve Naroff | e2ef815 | 2008-04-04 14:32:09 +0000 | [diff] [blame] | 4484 | return FD; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4485 | } |
| 4486 | |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 4487 | /// \brief Adds any function attributes that we know a priori based on |
| 4488 | /// the declaration of this function. |
| 4489 | /// |
| 4490 | /// These attributes can apply both to implicitly-declared builtins |
| 4491 | /// (like __builtin___printf_chk) or to library-declared functions |
| 4492 | /// like NSLog or printf. |
| 4493 | void Sema::AddKnownFunctionAttributes(FunctionDecl *FD) { |
| 4494 | if (FD->isInvalidDecl()) |
| 4495 | return; |
| 4496 | |
| 4497 | // If this is a built-in function, map its builtin attributes to |
| 4498 | // actual attributes. |
Douglas Gregor | 7814e6d | 2009-09-12 00:22:50 +0000 | [diff] [blame] | 4499 | if (unsigned BuiltinID = FD->getBuiltinID()) { |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 4500 | // Handle printf-formatting attributes. |
| 4501 | unsigned FormatIdx; |
| 4502 | bool HasVAListArg; |
| 4503 | if (Context.BuiltinInfo.isPrintfLike(BuiltinID, FormatIdx, HasVAListArg)) { |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 4504 | if (!FD->getAttr<FormatAttr>()) |
Ted Kremenek | 3d2c43e | 2010-02-11 05:28:37 +0000 | [diff] [blame] | 4505 | FD->addAttr(::new (Context) FormatAttr(Context, "printf", FormatIdx+1, |
| 4506 | HasVAListArg ? 0 : FormatIdx+2)); |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 4507 | } |
Daniel Dunbar | ef2abfe | 2009-02-16 22:43:43 +0000 | [diff] [blame] | 4508 | |
| 4509 | // Mark const if we don't care about errno and that is the only |
| 4510 | // thing preventing the function from being const. This allows |
| 4511 | // IRgen to use LLVM intrinsics for such functions. |
| 4512 | if (!getLangOptions().MathErrno && |
| 4513 | Context.BuiltinInfo.isConstWithoutErrno(BuiltinID)) { |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 4514 | if (!FD->getAttr<ConstAttr>()) |
| 4515 | FD->addAttr(::new (Context) ConstAttr()); |
Daniel Dunbar | ef2abfe | 2009-02-16 22:43:43 +0000 | [diff] [blame] | 4516 | } |
Mike Stump | 0feecbb | 2009-07-27 19:14:18 +0000 | [diff] [blame] | 4517 | |
| 4518 | if (Context.BuiltinInfo.isNoReturn(BuiltinID)) |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame] | 4519 | FD->setType(Context.getNoReturnType(FD->getType())); |
Chris Lattner | 551f708 | 2009-12-30 22:06:22 +0000 | [diff] [blame] | 4520 | if (Context.BuiltinInfo.isNoThrow(BuiltinID)) |
| 4521 | FD->addAttr(::new (Context) NoThrowAttr()); |
| 4522 | if (Context.BuiltinInfo.isConst(BuiltinID)) |
| 4523 | FD->addAttr(::new (Context) ConstAttr()); |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 4524 | } |
| 4525 | |
| 4526 | IdentifierInfo *Name = FD->getIdentifier(); |
| 4527 | if (!Name) |
| 4528 | return; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4529 | if ((!getLangOptions().CPlusPlus && |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 4530 | FD->getDeclContext()->isTranslationUnit()) || |
| 4531 | (isa<LinkageSpecDecl>(FD->getDeclContext()) && |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4532 | cast<LinkageSpecDecl>(FD->getDeclContext())->getLanguage() == |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 4533 | LinkageSpecDecl::lang_c)) { |
| 4534 | // Okay: this could be a libc/libm/Objective-C function we know |
| 4535 | // about. |
| 4536 | } else |
| 4537 | return; |
| 4538 | |
Douglas Gregor | 21e072b | 2009-04-22 20:56:09 +0000 | [diff] [blame] | 4539 | if (Name->isStr("NSLog") || Name->isStr("NSLogv")) { |
Mike Stump | 523a8fd | 2009-07-28 00:07:08 +0000 | [diff] [blame] | 4540 | // FIXME: NSLog and NSLogv should be target specific |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 4541 | if (const FormatAttr *Format = FD->getAttr<FormatAttr>()) { |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 4542 | // FIXME: We known better than our headers. |
Ted Kremenek | 3d2c43e | 2010-02-11 05:28:37 +0000 | [diff] [blame] | 4543 | const_cast<FormatAttr *>(Format)->setType(Context, "printf"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4544 | } else |
Ted Kremenek | 3d2c43e | 2010-02-11 05:28:37 +0000 | [diff] [blame] | 4545 | FD->addAttr(::new (Context) FormatAttr(Context, "printf", 1, |
Eli Friedman | d7dad72 | 2009-06-10 04:01:38 +0000 | [diff] [blame] | 4546 | Name->isStr("NSLogv") ? 0 : 2)); |
Douglas Gregor | 21e072b | 2009-04-22 20:56:09 +0000 | [diff] [blame] | 4547 | } else if (Name->isStr("asprintf") || Name->isStr("vasprintf")) { |
Mike Stump | 523a8fd | 2009-07-28 00:07:08 +0000 | [diff] [blame] | 4548 | // FIXME: asprintf and vasprintf aren't C99 functions. Should they be |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4549 | // target-specific builtins, perhaps? |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 4550 | if (!FD->getAttr<FormatAttr>()) |
Ted Kremenek | 3d2c43e | 2010-02-11 05:28:37 +0000 | [diff] [blame] | 4551 | FD->addAttr(::new (Context) FormatAttr(Context, "printf", 2, |
Eli Friedman | d7dad72 | 2009-06-10 04:01:38 +0000 | [diff] [blame] | 4552 | Name->isStr("vasprintf") ? 0 : 3)); |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 4553 | } |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 4554 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4555 | |
John McCall | ba6a9bd | 2009-10-24 08:00:42 +0000 | [diff] [blame] | 4556 | TypedefDecl *Sema::ParseTypedefDecl(Scope *S, Declarator &D, QualType T, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 4557 | TypeSourceInfo *TInfo) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4558 | assert(D.getIdentifier() && "Wrong callback for declspec without declarator"); |
Steve Naroff | 5912a35 | 2007-08-28 20:14:24 +0000 | [diff] [blame] | 4559 | assert(!T.isNull() && "GetTypeForDeclarator() returned null type"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4560 | |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 4561 | if (!TInfo) { |
John McCall | ba6a9bd | 2009-10-24 08:00:42 +0000 | [diff] [blame] | 4562 | assert(D.isInvalidType() && "no declarator info for valid type"); |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 4563 | TInfo = Context.getTrivialTypeSourceInfo(T); |
John McCall | ba6a9bd | 2009-10-24 08:00:42 +0000 | [diff] [blame] | 4564 | } |
| 4565 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4566 | // Scope manipulation handled by caller. |
Chris Lattner | 0ed844b | 2008-04-04 06:12:32 +0000 | [diff] [blame] | 4567 | TypedefDecl *NewTD = TypedefDecl::Create(Context, CurContext, |
| 4568 | D.getIdentifierLoc(), |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4569 | D.getIdentifier(), |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 4570 | TInfo); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4571 | |
John McCall | 2191b20 | 2009-09-05 06:31:47 +0000 | [diff] [blame] | 4572 | if (const TagType *TT = T->getAs<TagType>()) { |
Anders Carlsson | 4843e58 | 2009-03-10 17:07:44 +0000 | [diff] [blame] | 4573 | TagDecl *TD = TT->getDecl(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4574 | |
Anders Carlsson | 4843e58 | 2009-03-10 17:07:44 +0000 | [diff] [blame] | 4575 | // If the TagDecl that the TypedefDecl points to is an anonymous decl |
| 4576 | // keep track of the TypedefDecl. |
| 4577 | if (!TD->getIdentifier() && !TD->getTypedefForAnonDecl()) |
| 4578 | TD->setTypedefForAnonDecl(NewTD); |
| 4579 | } |
| 4580 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 4581 | if (D.isInvalidType()) |
Steve Naroff | 5912a35 | 2007-08-28 20:14:24 +0000 | [diff] [blame] | 4582 | NewTD->setInvalidDecl(); |
| 4583 | return NewTD; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4584 | } |
| 4585 | |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 4586 | |
| 4587 | /// \brief Determine whether a tag with a given kind is acceptable |
| 4588 | /// as a redeclaration of the given tag declaration. |
| 4589 | /// |
| 4590 | /// \returns true if the new tag kind is acceptable, false otherwise. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4591 | bool Sema::isAcceptableTagRedeclaration(const TagDecl *Previous, |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 4592 | TagDecl::TagKind NewTag, |
| 4593 | SourceLocation NewTagLoc, |
| 4594 | const IdentifierInfo &Name) { |
| 4595 | // C++ [dcl.type.elab]p3: |
| 4596 | // The class-key or enum keyword present in the |
| 4597 | // elaborated-type-specifier shall agree in kind with the |
| 4598 | // declaration to which the name in theelaborated-type-specifier |
| 4599 | // refers. This rule also applies to the form of |
| 4600 | // elaborated-type-specifier that declares a class-name or |
| 4601 | // friend class since it can be construed as referring to the |
| 4602 | // definition of the class. Thus, in any |
| 4603 | // elaborated-type-specifier, the enum keyword shall be used to |
| 4604 | // refer to an enumeration (7.2), the union class-keyshall be |
| 4605 | // used to refer to a union (clause 9), and either the class or |
| 4606 | // struct class-key shall be used to refer to a class (clause 9) |
| 4607 | // declared using the class or struct class-key. |
| 4608 | TagDecl::TagKind OldTag = Previous->getTagKind(); |
| 4609 | if (OldTag == NewTag) |
| 4610 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4611 | |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 4612 | if ((OldTag == TagDecl::TK_struct || OldTag == TagDecl::TK_class) && |
| 4613 | (NewTag == TagDecl::TK_struct || NewTag == TagDecl::TK_class)) { |
| 4614 | // Warn about the struct/class tag mismatch. |
| 4615 | bool isTemplate = false; |
| 4616 | if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(Previous)) |
| 4617 | isTemplate = Record->getDescribedClassTemplate(); |
| 4618 | |
| 4619 | Diag(NewTagLoc, diag::warn_struct_class_tag_mismatch) |
| 4620 | << (NewTag == TagDecl::TK_class) |
| 4621 | << isTemplate << &Name |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 4622 | << CodeModificationHint::CreateReplacement(SourceRange(NewTagLoc), |
| 4623 | OldTag == TagDecl::TK_class? "class" : "struct"); |
| 4624 | Diag(Previous->getLocation(), diag::note_previous_use); |
| 4625 | return true; |
| 4626 | } |
| 4627 | return false; |
| 4628 | } |
| 4629 | |
Steve Naroff | 08d92e4 | 2007-09-15 18:49:24 +0000 | [diff] [blame] | 4630 | /// 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] | 4631 | /// 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] | 4632 | /// 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] | 4633 | /// reference/declaration/definition of a tag. |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 4634 | Sema::DeclPtrTy Sema::ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4635 | SourceLocation KWLoc, const CXXScopeSpec &SS, |
| 4636 | IdentifierInfo *Name, SourceLocation NameLoc, |
Douglas Gregor | 402abb5 | 2009-05-28 23:31:59 +0000 | [diff] [blame] | 4637 | AttributeList *Attr, AccessSpecifier AS, |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 4638 | MultiTemplateParamsArg TemplateParameterLists, |
John McCall | c4e7019 | 2009-09-11 04:59:25 +0000 | [diff] [blame] | 4639 | bool &OwnedDecl, bool &IsDependent) { |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4640 | // If this is not a definition, it must have a name. |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 4641 | assert((Name != 0 || TUK == TUK_Definition) && |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4642 | "Nameless record must be a definition!"); |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 4643 | |
Douglas Gregor | 402abb5 | 2009-05-28 23:31:59 +0000 | [diff] [blame] | 4644 | OwnedDecl = false; |
John McCall | f1bbbb4 | 2009-09-04 01:14:41 +0000 | [diff] [blame] | 4645 | TagDecl::TagKind Kind = TagDecl::getTagKindForTypeSpec(TagSpec); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4646 | |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 4647 | // FIXME: Check explicit specializations more carefully. |
| 4648 | bool isExplicitSpecialization = false; |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 4649 | if (TUK != TUK_Reference) { |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 4650 | if (TemplateParameterList *TemplateParams |
| 4651 | = MatchTemplateParametersToScopeSpecifier(KWLoc, SS, |
| 4652 | (TemplateParameterList**)TemplateParameterLists.get(), |
Douglas Gregor | 1fef4e6 | 2009-10-07 22:35:40 +0000 | [diff] [blame] | 4653 | TemplateParameterLists.size(), |
| 4654 | isExplicitSpecialization)) { |
Douglas Gregor | d85bea2 | 2009-09-26 06:47:28 +0000 | [diff] [blame] | 4655 | if (TemplateParams->size() > 0) { |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 4656 | // This is a declaration or definition of a class template (which may |
| 4657 | // be a member of another template). |
| 4658 | OwnedDecl = false; |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 4659 | DeclResult Result = CheckClassTemplate(S, TagSpec, TUK, KWLoc, |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 4660 | SS, Name, NameLoc, Attr, |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 4661 | TemplateParams, |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 4662 | AS); |
Douglas Gregor | 05396e2 | 2009-08-25 17:23:04 +0000 | [diff] [blame] | 4663 | TemplateParameterLists.release(); |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 4664 | return Result.get(); |
| 4665 | } else { |
Douglas Gregor | f6b1185 | 2009-10-08 15:14:33 +0000 | [diff] [blame] | 4666 | // The "template<>" header is extraneous. |
| 4667 | Diag(TemplateParams->getTemplateLoc(), diag::err_template_tag_noparams) |
| 4668 | << ElaboratedType::getNameForTagKind(Kind) << Name; |
| 4669 | isExplicitSpecialization = true; |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 4670 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4671 | } |
Douglas Gregor | f6b1185 | 2009-10-08 15:14:33 +0000 | [diff] [blame] | 4672 | |
| 4673 | TemplateParameterLists.release(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4674 | } |
| 4675 | |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 4676 | DeclContext *SearchDC = CurContext; |
Argyrios Kyrtzidis | 0f84a23 | 2008-11-09 22:53:32 +0000 | [diff] [blame] | 4677 | DeclContext *DC = CurContext; |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 4678 | bool isStdBadAlloc = false; |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 4679 | bool Invalid = false; |
| 4680 | |
Chandler Carruth | 7bf3600 | 2010-03-01 21:17:36 +0000 | [diff] [blame] | 4681 | RedeclarationKind Redecl = ForRedeclaration; |
| 4682 | if (TUK == TUK_Friend || TUK == TUK_Reference) |
| 4683 | Redecl = NotForRedeclaration; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4684 | |
| 4685 | LookupResult Previous(*this, Name, NameLoc, LookupTagName, Redecl); |
John McCall | 6e24726 | 2009-10-10 05:48:19 +0000 | [diff] [blame] | 4686 | |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 4687 | if (Name && SS.isNotEmpty()) { |
| 4688 | // We have a nested-name tag ('struct foo::bar'). |
| 4689 | |
| 4690 | // Check for invalid 'foo::'. |
Argyrios Kyrtzidis | 0f84a23 | 2008-11-09 22:53:32 +0000 | [diff] [blame] | 4691 | if (SS.isInvalid()) { |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 4692 | Name = 0; |
| 4693 | goto CreateNewDecl; |
| 4694 | } |
| 4695 | |
John McCall | c4e7019 | 2009-09-11 04:59:25 +0000 | [diff] [blame] | 4696 | // If this is a friend or a reference to a class in a dependent |
| 4697 | // context, don't try to make a decl for it. |
| 4698 | if (TUK == TUK_Friend || TUK == TUK_Reference) { |
| 4699 | DC = computeDeclContext(SS, false); |
| 4700 | if (!DC) { |
| 4701 | IsDependent = true; |
| 4702 | return DeclPtrTy(); |
| 4703 | } |
| 4704 | } |
| 4705 | |
Douglas Gregor | 3f5b61c | 2009-05-14 00:28:11 +0000 | [diff] [blame] | 4706 | if (RequireCompleteDeclContext(SS)) |
| 4707 | return DeclPtrTy::make((Decl *)0); |
| 4708 | |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 4709 | DC = computeDeclContext(SS, true); |
Douglas Gregor | 1931b44 | 2009-02-03 00:34:39 +0000 | [diff] [blame] | 4710 | SearchDC = DC; |
Argyrios Kyrtzidis | 0f84a23 | 2008-11-09 22:53:32 +0000 | [diff] [blame] | 4711 | // Look-up name inside 'foo::'. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4712 | LookupQualifiedName(Previous, DC); |
John McCall | 6e24726 | 2009-10-10 05:48:19 +0000 | [diff] [blame] | 4713 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4714 | if (Previous.isAmbiguous()) |
John McCall | 6e24726 | 2009-10-10 05:48:19 +0000 | [diff] [blame] | 4715 | return DeclPtrTy(); |
John McCall | 6e24726 | 2009-10-10 05:48:19 +0000 | [diff] [blame] | 4716 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4717 | if (Previous.empty()) { |
Douglas Gregor | 9edad9b | 2010-01-14 17:47:39 +0000 | [diff] [blame] | 4718 | // Name lookup did not find anything. However, if the |
| 4719 | // nested-name-specifier refers to the current instantiation, |
| 4720 | // and that current instantiation has any dependent base |
| 4721 | // classes, we might find something at instantiation time: treat |
| 4722 | // this as a dependent elaborated-type-specifier. |
Douglas Gregor | 7d3f576 | 2010-01-15 01:44:47 +0000 | [diff] [blame] | 4723 | if (Previous.wasNotFoundInCurrentInstantiation()) { |
Douglas Gregor | 9edad9b | 2010-01-14 17:47:39 +0000 | [diff] [blame] | 4724 | IsDependent = true; |
| 4725 | return DeclPtrTy(); |
| 4726 | } |
| 4727 | |
| 4728 | // A tag 'foo::bar' must already exist. |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 4729 | Diag(NameLoc, diag::err_not_tag_in_scope) << Name << SS.getRange(); |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 4730 | Name = 0; |
Douglas Gregor | d0c8737 | 2009-05-27 17:30:49 +0000 | [diff] [blame] | 4731 | Invalid = true; |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 4732 | goto CreateNewDecl; |
| 4733 | } |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 4734 | } else if (Name) { |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 4735 | // If this is a named struct, check to see if there was a previous forward |
| 4736 | // declaration or definition. |
Douglas Gregor | 2a3009a | 2009-02-03 19:21:40 +0000 | [diff] [blame] | 4737 | // FIXME: We're looking into outer scopes here, even when we |
| 4738 | // shouldn't be. Doing so can result in ambiguities that we |
| 4739 | // shouldn't be diagnosing. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4740 | LookupName(Previous, S); |
| 4741 | |
| 4742 | // Note: there used to be some attempt at recovery here. |
| 4743 | if (Previous.isAmbiguous()) |
| 4744 | return DeclPtrTy(); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 4745 | |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 4746 | if (!getLangOptions().CPlusPlus && TUK != TUK_Reference) { |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 4747 | // FIXME: This makes sure that we ignore the contexts associated |
| 4748 | // with C structs, unions, and enums when looking for a matching |
| 4749 | // tag declaration or definition. See the similar lookup tweak |
Douglas Gregor | 4c921ae | 2009-01-30 01:04:22 +0000 | [diff] [blame] | 4750 | // in Sema::LookupName; is there a better way to deal with this? |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 4751 | while (isa<RecordDecl>(SearchDC) || isa<EnumDecl>(SearchDC)) |
| 4752 | SearchDC = SearchDC->getParent(); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 4753 | } |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 4754 | } |
| 4755 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4756 | if (Previous.isSingleResult() && |
| 4757 | Previous.getFoundDecl()->isTemplateParameter()) { |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 4758 | // Maybe we will complain about the shadowed template parameter. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4759 | DiagnoseTemplateParameterShadow(NameLoc, Previous.getFoundDecl()); |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 4760 | // Just pretend that we didn't see the previous declaration. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4761 | Previous.clear(); |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 4762 | } |
| 4763 | |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 4764 | if (getLangOptions().CPlusPlus && Name && DC && StdNamespace && |
| 4765 | DC->Equals(StdNamespace) && Name->isStr("bad_alloc")) { |
| 4766 | // This is a declaration of or a reference to "std::bad_alloc". |
| 4767 | isStdBadAlloc = true; |
| 4768 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4769 | if (Previous.empty() && StdBadAlloc) { |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 4770 | // std::bad_alloc has been implicitly declared (but made invisible to |
| 4771 | // name lookup). Fill in this implicit declaration as the previous |
| 4772 | // declaration, so that the declarations get chained appropriately. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4773 | Previous.addDecl(StdBadAlloc); |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 4774 | } |
| 4775 | } |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4776 | |
John McCall | 9c86b51 | 2010-03-25 21:28:06 +0000 | [diff] [blame^] | 4777 | // If we didn't find a previous declaration, and this is a reference |
| 4778 | // (or friend reference), move to the correct scope. In C++, we |
| 4779 | // also need to do a redeclaration lookup there, just in case |
| 4780 | // there's a shadow friend decl. |
| 4781 | if (Name && Previous.empty() && |
| 4782 | (TUK == TUK_Reference || TUK == TUK_Friend)) { |
| 4783 | if (Invalid) goto CreateNewDecl; |
| 4784 | assert(SS.isEmpty()); |
| 4785 | |
| 4786 | if (TUK == TUK_Reference) { |
| 4787 | // C++ [basic.scope.pdecl]p5: |
| 4788 | // -- for an elaborated-type-specifier of the form |
| 4789 | // |
| 4790 | // class-key identifier |
| 4791 | // |
| 4792 | // if the elaborated-type-specifier is used in the |
| 4793 | // decl-specifier-seq or parameter-declaration-clause of a |
| 4794 | // function defined in namespace scope, the identifier is |
| 4795 | // declared as a class-name in the namespace that contains |
| 4796 | // the declaration; otherwise, except as a friend |
| 4797 | // declaration, the identifier is declared in the smallest |
| 4798 | // non-class, non-function-prototype scope that contains the |
| 4799 | // declaration. |
| 4800 | // |
| 4801 | // C99 6.7.2.3p8 has a similar (but not identical!) provision for |
| 4802 | // C structs and unions. |
| 4803 | // |
| 4804 | // It is an error in C++ to declare (rather than define) an enum |
| 4805 | // type, including via an elaborated type specifier. We'll |
| 4806 | // diagnose that later; for now, declare the enum in the same |
| 4807 | // scope as we would have picked for any other tag type. |
| 4808 | // |
| 4809 | // GNU C also supports this behavior as part of its incomplete |
| 4810 | // enum types extension, while GNU C++ does not. |
| 4811 | // |
| 4812 | // Find the context where we'll be declaring the tag. |
| 4813 | // FIXME: We would like to maintain the current DeclContext as the |
| 4814 | // lexical context, |
| 4815 | while (SearchDC->isRecord()) |
| 4816 | SearchDC = SearchDC->getParent(); |
| 4817 | |
| 4818 | // Find the scope where we'll be declaring the tag. |
| 4819 | while (S->isClassScope() || |
| 4820 | (getLangOptions().CPlusPlus && |
| 4821 | S->isFunctionPrototypeScope()) || |
| 4822 | ((S->getFlags() & Scope::DeclScope) == 0) || |
| 4823 | (S->getEntity() && |
| 4824 | ((DeclContext *)S->getEntity())->isTransparentContext())) |
| 4825 | S = S->getParent(); |
| 4826 | } else { |
| 4827 | assert(TUK == TUK_Friend); |
| 4828 | // C++ [namespace.memdef]p3: |
| 4829 | // If a friend declaration in a non-local class first declares a |
| 4830 | // class or function, the friend class or function is a member of |
| 4831 | // the innermost enclosing namespace. |
| 4832 | SearchDC = SearchDC->getEnclosingNamespaceContext(); |
| 4833 | |
| 4834 | // Look up through our scopes until we find one with an entity which |
| 4835 | // matches our declaration context. |
| 4836 | while (S->getEntity() && |
| 4837 | ((DeclContext *)S->getEntity())->getPrimaryContext() != SearchDC) { |
| 4838 | S = S->getParent(); |
| 4839 | assert(S && "No enclosing scope matching the enclosing namespace."); |
| 4840 | } |
| 4841 | } |
| 4842 | |
| 4843 | // In C++, look for a shadow friend decl. |
| 4844 | if (getLangOptions().CPlusPlus) { |
| 4845 | Previous.setRedeclarationKind(ForRedeclaration); |
| 4846 | LookupQualifiedName(Previous, SearchDC); |
| 4847 | } |
| 4848 | } |
| 4849 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4850 | if (!Previous.empty()) { |
| 4851 | assert(Previous.isSingleResult()); |
| 4852 | NamedDecl *PrevDecl = Previous.getFoundDecl(); |
Argyrios Kyrtzidis | 2d1c5d3 | 2008-04-27 13:50:30 +0000 | [diff] [blame] | 4853 | if (TagDecl *PrevTagDecl = dyn_cast<TagDecl>(PrevDecl)) { |
Chris Lattner | 14943b9 | 2008-07-03 03:30:58 +0000 | [diff] [blame] | 4854 | // If this is a use of a previous tag, or if the tag is already declared |
| 4855 | // in the same scope (so that the definition/declaration completes or |
Argyrios Kyrtzidis | 2d1c5d3 | 2008-04-27 13:50:30 +0000 | [diff] [blame] | 4856 | // rementions the tag), reuse the decl. |
John McCall | 67d1a67 | 2009-08-06 02:15:43 +0000 | [diff] [blame] | 4857 | if (TUK == TUK_Reference || TUK == TUK_Friend || |
| 4858 | isDeclInScope(PrevDecl, SearchDC, S)) { |
Chris Lattner | 14943b9 | 2008-07-03 03:30:58 +0000 | [diff] [blame] | 4859 | // Make sure that this wasn't declared as an enum and now used as a |
| 4860 | // struct or something similar. |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 4861 | if (!isAcceptableTagRedeclaration(PrevTagDecl, Kind, KWLoc, *Name)) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4862 | bool SafeToContinue |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 4863 | = (PrevTagDecl->getTagKind() != TagDecl::TK_enum && |
| 4864 | Kind != TagDecl::TK_enum); |
| 4865 | if (SafeToContinue) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4866 | Diag(KWLoc, diag::err_use_with_wrong_tag) |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 4867 | << Name |
| 4868 | << CodeModificationHint::CreateReplacement(SourceRange(KWLoc), |
| 4869 | PrevTagDecl->getKindName()); |
| 4870 | else |
| 4871 | Diag(KWLoc, diag::err_use_with_wrong_tag) << Name; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4872 | Diag(PrevTagDecl->getLocation(), diag::note_previous_use); |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 4873 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4874 | if (SafeToContinue) |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 4875 | Kind = PrevTagDecl->getTagKind(); |
| 4876 | else { |
| 4877 | // Recover by making this an anonymous redefinition. |
| 4878 | Name = 0; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4879 | Previous.clear(); |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 4880 | Invalid = true; |
| 4881 | } |
| 4882 | } |
| 4883 | |
| 4884 | if (!Invalid) { |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4885 | // If this is a use, just return the declaration we found. |
Chris Lattner | 14943b9 | 2008-07-03 03:30:58 +0000 | [diff] [blame] | 4886 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4887 | // FIXME: In the future, return a variant or some other clue |
| 4888 | // for the consumer of this Decl to know it doesn't own it. |
| 4889 | // For our current ASTs this shouldn't be a problem, but will |
| 4890 | // need to be changed with DeclGroups. |
John McCall | e3af023 | 2009-10-07 23:34:25 +0000 | [diff] [blame] | 4891 | if (TUK == TUK_Reference || TUK == TUK_Friend) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4892 | return DeclPtrTy::make(PrevTagDecl); |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 4893 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4894 | // Diagnose attempts to redefine a tag. |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 4895 | if (TUK == TUK_Definition) { |
Douglas Gregor | 952b017 | 2010-02-11 01:04:33 +0000 | [diff] [blame] | 4896 | if (TagDecl *Def = PrevTagDecl->getDefinition()) { |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 4897 | // If we're defining a specialization and the previous definition |
| 4898 | // is from an implicit instantiation, don't emit an error |
| 4899 | // here; we'll catch this in the general case below. |
| 4900 | if (!isExplicitSpecialization || |
| 4901 | !isa<CXXRecordDecl>(Def) || |
| 4902 | cast<CXXRecordDecl>(Def)->getTemplateSpecializationKind() |
| 4903 | == TSK_ExplicitSpecialization) { |
| 4904 | Diag(NameLoc, diag::err_redefinition) << Name; |
| 4905 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 4906 | // If this is a redefinition, recover by making this |
| 4907 | // struct be anonymous, which will make any later |
| 4908 | // references get the previous definition. |
| 4909 | Name = 0; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4910 | Previous.clear(); |
Douglas Gregor | b3ae4fc | 2009-10-12 20:18:28 +0000 | [diff] [blame] | 4911 | Invalid = true; |
| 4912 | } |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 4913 | } else { |
| 4914 | // If the type is currently being defined, complain |
| 4915 | // about a nested redefinition. |
| 4916 | TagType *Tag = cast<TagType>(Context.getTagDeclType(PrevTagDecl)); |
| 4917 | if (Tag->isBeingDefined()) { |
| 4918 | Diag(NameLoc, diag::err_nested_redefinition) << Name; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4919 | Diag(PrevTagDecl->getLocation(), |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 4920 | diag::note_previous_definition); |
| 4921 | Name = 0; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4922 | Previous.clear(); |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 4923 | Invalid = true; |
| 4924 | } |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4925 | } |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 4926 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4927 | // Okay, this is definition of a previously declared or referenced |
| 4928 | // tag PrevDecl. We're going to create a new Decl for it. |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 4929 | } |
Argyrios Kyrtzidis | 2d1c5d3 | 2008-04-27 13:50:30 +0000 | [diff] [blame] | 4930 | } |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4931 | // If we get here we have (another) forward declaration or we |
John McCall | 67d1a67 | 2009-08-06 02:15:43 +0000 | [diff] [blame] | 4932 | // have a definition. Just create a new decl. |
| 4933 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4934 | } else { |
| 4935 | // 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] | 4936 | // scope, e.g. "struct foo; void bar() { struct foo; }", just create a |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4937 | // new decl/type. We set PrevDecl to NULL so that the entities |
| 4938 | // have distinct types. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4939 | Previous.clear(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4940 | } |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4941 | // If we get here, we're going to create a new Decl. If PrevDecl |
| 4942 | // is non-NULL, it's a definition of the tag declared by |
| 4943 | // PrevDecl. If it's NULL, we have a new definition. |
Argyrios Kyrtzidis | 2d1c5d3 | 2008-04-27 13:50:30 +0000 | [diff] [blame] | 4944 | } else { |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 4945 | // PrevDecl is a namespace, template, or anything else |
| 4946 | // that lives in the IDNS_Tag identifier namespace. |
John McCall | 9c86b51 | 2010-03-25 21:28:06 +0000 | [diff] [blame^] | 4947 | if (TUK == TUK_Reference || TUK == TUK_Friend || |
| 4948 | isDeclInScope(PrevDecl, SearchDC, S)) { |
Ted Kremenek | a89d197 | 2008-09-03 18:03:35 +0000 | [diff] [blame] | 4949 | // The tag name clashes with a namespace name, issue an error and |
| 4950 | // recover by making this tag be anonymous. |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 4951 | Diag(NameLoc, diag::err_redefinition_different_kind) << Name; |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 4952 | Diag(PrevDecl->getLocation(), diag::note_previous_definition); |
Argyrios Kyrtzidis | b02ef24 | 2008-07-16 07:45:46 +0000 | [diff] [blame] | 4953 | Name = 0; |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4954 | Previous.clear(); |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 4955 | Invalid = true; |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4956 | } else { |
| 4957 | // The existing declaration isn't relevant to us; we're in a |
| 4958 | // new scope, so clear out the previous declaration. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4959 | Previous.clear(); |
Argyrios Kyrtzidis | b02ef24 | 2008-07-16 07:45:46 +0000 | [diff] [blame] | 4960 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4961 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4962 | } |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 4963 | |
Chris Lattner | cc98eac | 2008-12-17 07:13:27 +0000 | [diff] [blame] | 4964 | CreateNewDecl: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4965 | |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 4966 | TagDecl *PrevDecl = 0; |
| 4967 | if (Previous.isSingleResult()) |
| 4968 | PrevDecl = cast<TagDecl>(Previous.getFoundDecl()); |
| 4969 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4970 | // If there is an identifier, use the location of the identifier as the |
| 4971 | // location of the decl, otherwise use the location of the struct/union |
| 4972 | // keyword. |
| 4973 | SourceLocation Loc = NameLoc.isValid() ? NameLoc : KWLoc; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 4974 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4975 | // Otherwise, create a new declaration. If there is a previous |
| 4976 | // declaration of the same entity, the two will be linked via |
| 4977 | // PrevDecl. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4978 | TagDecl *New; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 4979 | |
Argyrios Kyrtzidis | 39ba4ae | 2008-06-09 23:19:58 +0000 | [diff] [blame] | 4980 | if (Kind == TagDecl::TK_enum) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4981 | // FIXME: Tag decls should be chained to any simultaneous vardecls, e.g.: |
| 4982 | // enum X { A, B, C } D; D should chain to X. |
Douglas Gregor | 741dd9a | 2009-07-21 14:46:17 +0000 | [diff] [blame] | 4983 | New = EnumDecl::Create(Context, SearchDC, Loc, Name, KWLoc, |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4984 | cast_or_null<EnumDecl>(PrevDecl)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4985 | // If this is an undefined enum, warn. |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 4986 | if (TUK != TUK_Definition && !Invalid) { |
Douglas Gregor | 80711a2 | 2009-03-06 18:34:03 +0000 | [diff] [blame] | 4987 | unsigned DK = getLangOptions().CPlusPlus? diag::err_forward_ref_enum |
| 4988 | : diag::ext_forward_ref_enum; |
| 4989 | Diag(Loc, DK); |
| 4990 | } |
Argyrios Kyrtzidis | 39ba4ae | 2008-06-09 23:19:58 +0000 | [diff] [blame] | 4991 | } else { |
| 4992 | // struct/union/class |
| 4993 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4994 | // FIXME: Tag decls should be chained to any simultaneous vardecls, e.g.: |
| 4995 | // struct X { int A; } D; D should chain to X. |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 4996 | if (getLangOptions().CPlusPlus) { |
Ted Kremenek | 2b345eb | 2008-09-05 17:39:33 +0000 | [diff] [blame] | 4997 | // FIXME: Look for a way to use RecordDecl for simple structs. |
Douglas Gregor | 741dd9a | 2009-07-21 14:46:17 +0000 | [diff] [blame] | 4998 | New = CXXRecordDecl::Create(Context, Kind, SearchDC, Loc, Name, KWLoc, |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4999 | cast_or_null<CXXRecordDecl>(PrevDecl)); |
Douglas Gregor | 7adb10f | 2009-09-15 22:30:29 +0000 | [diff] [blame] | 5000 | |
| 5001 | if (isStdBadAlloc && (!StdBadAlloc || StdBadAlloc->isImplicit())) |
| 5002 | StdBadAlloc = cast<CXXRecordDecl>(New); |
| 5003 | } else |
Douglas Gregor | 741dd9a | 2009-07-21 14:46:17 +0000 | [diff] [blame] | 5004 | New = RecordDecl::Create(Context, Kind, SearchDC, Loc, Name, KWLoc, |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 5005 | cast_or_null<RecordDecl>(PrevDecl)); |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 5006 | } |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 5007 | |
John McCall | b621766 | 2010-03-15 10:12:16 +0000 | [diff] [blame] | 5008 | // Maybe add qualifier info. |
| 5009 | if (SS.isNotEmpty()) { |
| 5010 | NestedNameSpecifier *NNS |
| 5011 | = static_cast<NestedNameSpecifier*>(SS.getScopeRep()); |
| 5012 | New->setQualifierInfo(NNS, SS.getRange()); |
| 5013 | } |
| 5014 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 5015 | if (Kind != TagDecl::TK_enum) { |
| 5016 | // Handle #pragma pack: if the #pragma pack stack has non-default |
| 5017 | // alignment, make up a packed attribute for this decl. These |
| 5018 | // attributes are checked when the ASTContext lays out the |
| 5019 | // structure. |
| 5020 | // |
| 5021 | // It is important for implementing the correct semantics that this |
| 5022 | // happen here (in act on tag decl). The #pragma pack stack is |
| 5023 | // maintained as a result of parser callbacks which can occur at |
| 5024 | // many points during the parsing of a struct declaration (because |
| 5025 | // the #pragma tokens are effectively skipped over during the |
| 5026 | // parsing of the struct). |
Chris Lattner | 574aa40 | 2009-02-17 01:09:29 +0000 | [diff] [blame] | 5027 | if (unsigned Alignment = getPragmaPackAlignment()) |
Anders Carlsson | a860e75 | 2009-08-08 18:23:56 +0000 | [diff] [blame] | 5028 | New->addAttr(::new (Context) PragmaPackAttr(Alignment * 8)); |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 5029 | } |
| 5030 | |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 5031 | if (getLangOptions().CPlusPlus && SS.isEmpty() && Name && !Invalid) { |
| 5032 | // C++ [dcl.typedef]p3: |
| 5033 | // [...] Similarly, in a given scope, a class or enumeration |
| 5034 | // shall not be declared with the same name as a typedef-name |
| 5035 | // that is declared in that scope and refers to a type other |
| 5036 | // than the class or enumeration itself. |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 5037 | LookupResult Lookup(*this, Name, NameLoc, LookupOrdinaryName, |
John McCall | 7d384dd | 2009-11-18 07:57:50 +0000 | [diff] [blame] | 5038 | ForRedeclaration); |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 5039 | LookupName(Lookup, S); |
John McCall | 1bcee0a | 2009-12-02 08:25:40 +0000 | [diff] [blame] | 5040 | TypedefDecl *PrevTypedef = Lookup.getAsSingle<TypedefDecl>(); |
Douglas Gregor | 2531c2d | 2009-09-28 00:47:05 +0000 | [diff] [blame] | 5041 | NamedDecl *PrevTypedefNamed = PrevTypedef; |
| 5042 | if (PrevTypedef && isDeclInScope(PrevTypedefNamed, SearchDC, S) && |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 5043 | Context.getCanonicalType(Context.getTypeDeclType(PrevTypedef)) != |
| 5044 | Context.getCanonicalType(Context.getTypeDeclType(New))) { |
| 5045 | Diag(Loc, diag::err_tag_definition_of_typedef) |
| 5046 | << Context.getTypeDeclType(New) |
| 5047 | << PrevTypedef->getUnderlyingType(); |
| 5048 | Diag(PrevTypedef->getLocation(), diag::note_previous_definition); |
| 5049 | Invalid = true; |
| 5050 | } |
| 5051 | } |
| 5052 | |
Douglas Gregor | f6b1185 | 2009-10-08 15:14:33 +0000 | [diff] [blame] | 5053 | // If this is a specialization of a member class (of a class template), |
| 5054 | // check the specialization. |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 5055 | if (isExplicitSpecialization && CheckMemberSpecialization(New, Previous)) |
Douglas Gregor | f6b1185 | 2009-10-08 15:14:33 +0000 | [diff] [blame] | 5056 | Invalid = true; |
| 5057 | |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 5058 | if (Invalid) |
| 5059 | New->setInvalidDecl(); |
| 5060 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 5061 | if (Attr) |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 5062 | ProcessDeclAttributeList(S, New, Attr); |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 5063 | |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 5064 | // If we're declaring or defining a tag in function prototype scope |
| 5065 | // 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] | 5066 | if (Name && S->isFunctionPrototypeScope() && !getLangOptions().CPlusPlus) |
| 5067 | Diag(Loc, diag::warn_decl_in_param_list) << Context.getTagDeclType(New); |
| 5068 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 5069 | // Set the lexical context. If the tag has a C++ scope specifier, the |
| 5070 | // lexical context will be different from the semantic context. |
Douglas Gregor | 1931b44 | 2009-02-03 00:34:39 +0000 | [diff] [blame] | 5071 | New->setLexicalDeclContext(CurContext); |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 5072 | |
John McCall | 02cace7 | 2009-08-28 07:59:38 +0000 | [diff] [blame] | 5073 | // Mark this as a friend decl if applicable. |
| 5074 | if (TUK == TUK_Friend) |
John McCall | 6826314 | 2009-11-18 22:49:29 +0000 | [diff] [blame] | 5075 | New->setObjectOfFriendDecl(/* PreviouslyDeclared = */ !Previous.empty()); |
John McCall | 02cace7 | 2009-08-28 07:59:38 +0000 | [diff] [blame] | 5076 | |
Anders Carlsson | 0cf8830 | 2009-03-26 01:19:02 +0000 | [diff] [blame] | 5077 | // Set the access specifier. |
John McCall | 9c86b51 | 2010-03-25 21:28:06 +0000 | [diff] [blame^] | 5078 | if (!Invalid && SearchDC->isRecord()) |
Douglas Gregor | d0c8737 | 2009-05-27 17:30:49 +0000 | [diff] [blame] | 5079 | SetMemberAccessSpecifier(New, PrevDecl, AS); |
Douglas Gregor | 06c0fec | 2009-03-25 22:00:53 +0000 | [diff] [blame] | 5080 | |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 5081 | if (TUK == TUK_Definition) |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 5082 | New->startDefinition(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5083 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5084 | // If this has an identifier, add it to the scope stack. |
John McCall | d7eff68 | 2009-09-02 00:55:30 +0000 | [diff] [blame] | 5085 | if (TUK == TUK_Friend) { |
John McCall | 82b9fb8 | 2009-09-02 19:32:14 +0000 | [diff] [blame] | 5086 | // We might be replacing an existing declaration in the lookup tables; |
| 5087 | // if so, borrow its access specifier. |
| 5088 | if (PrevDecl) |
| 5089 | New->setAccess(PrevDecl->getAccess()); |
| 5090 | |
John McCall | 9c86b51 | 2010-03-25 21:28:06 +0000 | [diff] [blame^] | 5091 | DeclContext *DC = New->getDeclContext()->getLookupContext(); |
| 5092 | DC->makeDeclVisibleInContext(New, /* Recoverable = */ false); |
| 5093 | if (Name) // can be null along some error paths |
John McCall | d7eff68 | 2009-09-02 00:55:30 +0000 | [diff] [blame] | 5094 | if (Scope *EnclosingScope = getScopeForDeclContext(S, DC)) |
| 5095 | PushOnScopeChains(New, EnclosingScope, /* AddToContext = */ false); |
John McCall | d7eff68 | 2009-09-02 00:55:30 +0000 | [diff] [blame] | 5096 | } else if (Name) { |
Douglas Gregor | 1a0d31a | 2009-01-12 18:45:55 +0000 | [diff] [blame] | 5097 | S = getNonFieldDeclScope(S); |
Douglas Gregor | 1931b44 | 2009-02-03 00:34:39 +0000 | [diff] [blame] | 5098 | PushOnScopeChains(New, S); |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 5099 | } else { |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 5100 | CurContext->addDecl(New); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5101 | } |
Argyrios Kyrtzidis | 5239304 | 2008-11-09 23:41:00 +0000 | [diff] [blame] | 5102 | |
Douglas Gregor | c29f77b | 2009-07-07 16:35:42 +0000 | [diff] [blame] | 5103 | // If this is the C FILE type, notify the AST context. |
| 5104 | if (IdentifierInfo *II = New->getIdentifier()) |
| 5105 | if (!New->isInvalidDecl() && |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 5106 | New->getDeclContext()->getLookupContext()->isTranslationUnit() && |
Douglas Gregor | c29f77b | 2009-07-07 16:35:42 +0000 | [diff] [blame] | 5107 | II->isStr("FILE")) |
| 5108 | Context.setFILEDecl(New); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5109 | |
Douglas Gregor | 402abb5 | 2009-05-28 23:31:59 +0000 | [diff] [blame] | 5110 | OwnedDecl = true; |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 5111 | return DeclPtrTy::make(New); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5112 | } |
| 5113 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 5114 | void Sema::ActOnTagStartDefinition(Scope *S, DeclPtrTy TagD) { |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 5115 | AdjustDeclIfTemplate(TagD); |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 5116 | TagDecl *Tag = cast<TagDecl>(TagD.getAs<Decl>()); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 5117 | |
| 5118 | // Enter the tag context. |
| 5119 | PushDeclContext(S, Tag); |
John McCall | f936815 | 2009-12-20 07:58:13 +0000 | [diff] [blame] | 5120 | } |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 5121 | |
John McCall | f936815 | 2009-12-20 07:58:13 +0000 | [diff] [blame] | 5122 | void Sema::ActOnStartCXXMemberDeclarations(Scope *S, DeclPtrTy TagD, |
| 5123 | SourceLocation LBraceLoc) { |
| 5124 | AdjustDeclIfTemplate(TagD); |
| 5125 | CXXRecordDecl *Record = cast<CXXRecordDecl>(TagD.getAs<Decl>()); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 5126 | |
John McCall | f936815 | 2009-12-20 07:58:13 +0000 | [diff] [blame] | 5127 | FieldCollector->StartClass(); |
| 5128 | |
| 5129 | if (!Record->getIdentifier()) |
| 5130 | return; |
| 5131 | |
| 5132 | // C++ [class]p2: |
| 5133 | // [...] The class-name is also inserted into the scope of the |
| 5134 | // class itself; this is known as the injected-class-name. For |
| 5135 | // purposes of access checking, the injected-class-name is treated |
| 5136 | // as if it were a public member name. |
| 5137 | CXXRecordDecl *InjectedClassName |
| 5138 | = CXXRecordDecl::Create(Context, Record->getTagKind(), |
| 5139 | CurContext, Record->getLocation(), |
| 5140 | Record->getIdentifier(), |
| 5141 | Record->getTagKeywordLoc(), |
| 5142 | Record); |
| 5143 | InjectedClassName->setImplicit(); |
| 5144 | InjectedClassName->setAccess(AS_public); |
| 5145 | if (ClassTemplateDecl *Template = Record->getDescribedClassTemplate()) |
| 5146 | InjectedClassName->setDescribedClassTemplate(Template); |
| 5147 | PushOnScopeChains(InjectedClassName, S); |
| 5148 | assert(InjectedClassName->isInjectedClassName() && |
| 5149 | "Broken injected-class-name"); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 5150 | } |
| 5151 | |
Douglas Gregor | adda846 | 2010-01-06 17:00:51 +0000 | [diff] [blame] | 5152 | // Traverses the class and any nested classes, making a note of any |
| 5153 | // dynamic classes that have no key function so that we can mark all of |
| 5154 | // their virtual member functions as "used" at the end of the translation |
| 5155 | // unit. This ensures that all functions needed by the vtable will get |
| 5156 | // instantiated/synthesized. |
| 5157 | static void |
| 5158 | RecordDynamicClassesWithNoKeyFunction(Sema &S, CXXRecordDecl *Record, |
| 5159 | SourceLocation Loc) { |
| 5160 | // We don't look at dependent or undefined classes. |
| 5161 | if (Record->isDependentContext() || !Record->isDefinition()) |
| 5162 | return; |
| 5163 | |
Anders Carlsson | 1610b81 | 2010-02-06 02:27:10 +0000 | [diff] [blame] | 5164 | if (Record->isDynamicClass()) { |
| 5165 | const CXXMethodDecl *KeyFunction = S.Context.getKeyFunction(Record); |
Douglas Gregor | adda846 | 2010-01-06 17:00:51 +0000 | [diff] [blame] | 5166 | |
Anders Carlsson | 1610b81 | 2010-02-06 02:27:10 +0000 | [diff] [blame] | 5167 | if (!KeyFunction) |
Benjamin Kramer | b372f51 | 2010-02-06 09:59:24 +0000 | [diff] [blame] | 5168 | S.ClassesWithUnmarkedVirtualMembers.push_back(std::make_pair(Record, |
| 5169 | Loc)); |
| 5170 | |
| 5171 | if ((!KeyFunction || (KeyFunction->getBody() && KeyFunction->isInlined())) |
| 5172 | && Record->getLinkage() == ExternalLinkage) |
Anders Carlsson | 1610b81 | 2010-02-06 02:27:10 +0000 | [diff] [blame] | 5173 | S.Diag(Record->getLocation(), diag::warn_weak_vtable) << Record; |
| 5174 | } |
Douglas Gregor | adda846 | 2010-01-06 17:00:51 +0000 | [diff] [blame] | 5175 | for (DeclContext::decl_iterator D = Record->decls_begin(), |
| 5176 | DEnd = Record->decls_end(); |
| 5177 | D != DEnd; ++D) { |
| 5178 | if (CXXRecordDecl *Nested = dyn_cast<CXXRecordDecl>(*D)) |
| 5179 | RecordDynamicClassesWithNoKeyFunction(S, Nested, Loc); |
| 5180 | } |
| 5181 | } |
| 5182 | |
Argyrios Kyrtzidis | 07a5b28 | 2009-07-14 03:17:52 +0000 | [diff] [blame] | 5183 | void Sema::ActOnTagFinishDefinition(Scope *S, DeclPtrTy TagD, |
| 5184 | SourceLocation RBraceLoc) { |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 5185 | AdjustDeclIfTemplate(TagD); |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 5186 | TagDecl *Tag = cast<TagDecl>(TagD.getAs<Decl>()); |
Argyrios Kyrtzidis | 07a5b28 | 2009-07-14 03:17:52 +0000 | [diff] [blame] | 5187 | Tag->setRBraceLoc(RBraceLoc); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 5188 | |
| 5189 | if (isa<CXXRecordDecl>(Tag)) |
| 5190 | FieldCollector->FinishClass(); |
| 5191 | |
| 5192 | // Exit this scope of this tag's definition. |
| 5193 | PopDeclContext(); |
| 5194 | |
Eli Friedman | d6a9324 | 2010-03-07 05:49:51 +0000 | [diff] [blame] | 5195 | if (isa<CXXRecordDecl>(Tag) && !Tag->getLexicalDeclContext()->isRecord()) |
Douglas Gregor | adda846 | 2010-01-06 17:00:51 +0000 | [diff] [blame] | 5196 | RecordDynamicClassesWithNoKeyFunction(*this, cast<CXXRecordDecl>(Tag), |
| 5197 | RBraceLoc); |
| 5198 | |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 5199 | // Notify the consumer that we've defined a tag. |
| 5200 | Consumer.HandleTagDeclDefinition(Tag); |
| 5201 | } |
Chris Lattner | 5a6ddbf | 2008-06-21 19:39:06 +0000 | [diff] [blame] | 5202 | |
John McCall | db7bb4a | 2010-03-17 00:38:33 +0000 | [diff] [blame] | 5203 | void Sema::ActOnTagDefinitionError(Scope *S, DeclPtrTy TagD) { |
| 5204 | AdjustDeclIfTemplate(TagD); |
| 5205 | TagDecl *Tag = cast<TagDecl>(TagD.getAs<Decl>()); |
John McCall | db7bb4a | 2010-03-17 00:38:33 +0000 | [diff] [blame] | 5206 | Tag->setInvalidDecl(); |
| 5207 | |
John McCall | a8cab01 | 2010-03-17 19:25:57 +0000 | [diff] [blame] | 5208 | // We're undoing ActOnTagStartDefinition here, not |
| 5209 | // ActOnStartCXXMemberDeclarations, so we don't have to mess with |
| 5210 | // the FieldCollector. |
John McCall | db7bb4a | 2010-03-17 00:38:33 +0000 | [diff] [blame] | 5211 | |
| 5212 | PopDeclContext(); |
| 5213 | } |
| 5214 | |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 5215 | // Note that FieldName may be null for anonymous bitfields. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5216 | bool Sema::VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 5217 | QualType FieldTy, const Expr *BitWidth, |
| 5218 | bool *ZeroWidth) { |
| 5219 | // Default to true; that shouldn't confuse checks for emptiness |
| 5220 | if (ZeroWidth) |
| 5221 | *ZeroWidth = true; |
| 5222 | |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 5223 | // C99 6.7.2.1p4 - verify the field type. |
Chris Lattner | 8b963ef | 2009-03-05 23:01:03 +0000 | [diff] [blame] | 5224 | // C++ 9.6p3: A bit-field shall have integral or enumeration type. |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 5225 | if (!FieldTy->isDependentType() && !FieldTy->isIntegralType()) { |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 5226 | // Handle incomplete types with specific error. |
Douglas Gregor | a03aca8 | 2009-03-10 21:58:27 +0000 | [diff] [blame] | 5227 | if (RequireCompleteType(FieldLoc, FieldTy, diag::err_field_incomplete)) |
| 5228 | return true; |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 5229 | if (FieldName) |
| 5230 | return Diag(FieldLoc, diag::err_not_integral_type_bitfield) |
| 5231 | << FieldName << FieldTy << BitWidth->getSourceRange(); |
| 5232 | return Diag(FieldLoc, diag::err_not_integral_type_anon_bitfield) |
| 5233 | << FieldTy << BitWidth->getSourceRange(); |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 5234 | } |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 5235 | |
| 5236 | // If the bit-width is type- or value-dependent, don't try to check |
| 5237 | // it now. |
| 5238 | if (BitWidth->isValueDependent() || BitWidth->isTypeDependent()) |
| 5239 | return false; |
| 5240 | |
Anders Carlsson | 9f1e572 | 2008-12-06 20:33:04 +0000 | [diff] [blame] | 5241 | llvm::APSInt Value; |
| 5242 | if (VerifyIntegerConstantExpression(BitWidth, &Value)) |
| 5243 | return true; |
| 5244 | |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 5245 | if (Value != 0 && ZeroWidth) |
| 5246 | *ZeroWidth = false; |
| 5247 | |
Chris Lattner | cd08707 | 2008-12-12 04:56:04 +0000 | [diff] [blame] | 5248 | // Zero-width bitfield is ok for anonymous field. |
| 5249 | if (Value == 0 && FieldName) |
| 5250 | return Diag(FieldLoc, diag::err_bitfield_has_zero_width) << FieldName; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5251 | |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 5252 | if (Value.isSigned() && Value.isNegative()) { |
| 5253 | if (FieldName) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5254 | return Diag(FieldLoc, diag::err_bitfield_has_negative_width) |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 5255 | << FieldName << Value.toString(10); |
| 5256 | return Diag(FieldLoc, diag::err_anon_bitfield_has_negative_width) |
| 5257 | << Value.toString(10); |
| 5258 | } |
Anders Carlsson | 9f1e572 | 2008-12-06 20:33:04 +0000 | [diff] [blame] | 5259 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 5260 | if (!FieldTy->isDependentType()) { |
| 5261 | uint64_t TypeSize = Context.getTypeSize(FieldTy); |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 5262 | if (Value.getZExtValue() > TypeSize) { |
| 5263 | if (FieldName) |
| 5264 | return Diag(FieldLoc, diag::err_bitfield_width_exceeds_type_size) |
| 5265 | << FieldName << (unsigned)TypeSize; |
| 5266 | return Diag(FieldLoc, diag::err_anon_bitfield_width_exceeds_type_size) |
| 5267 | << (unsigned)TypeSize; |
| 5268 | } |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 5269 | } |
Anders Carlsson | 9f1e572 | 2008-12-06 20:33:04 +0000 | [diff] [blame] | 5270 | |
| 5271 | return false; |
| 5272 | } |
| 5273 | |
Steve Naroff | 08d92e4 | 2007-09-15 18:49:24 +0000 | [diff] [blame] | 5274 | /// 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] | 5275 | /// to create a FieldDecl object for it. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 5276 | Sema::DeclPtrTy Sema::ActOnField(Scope *S, DeclPtrTy TagD, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5277 | SourceLocation DeclStart, |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 5278 | Declarator &D, ExprTy *BitfieldWidth) { |
| 5279 | FieldDecl *Res = HandleField(S, cast_or_null<RecordDecl>(TagD.getAs<Decl>()), |
| 5280 | DeclStart, D, static_cast<Expr*>(BitfieldWidth), |
| 5281 | AS_public); |
| 5282 | return DeclPtrTy::make(Res); |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 5283 | } |
| 5284 | |
| 5285 | /// HandleField - Analyze a field of a C struct or a C++ data member. |
| 5286 | /// |
| 5287 | FieldDecl *Sema::HandleField(Scope *S, RecordDecl *Record, |
| 5288 | SourceLocation DeclStart, |
Douglas Gregor | 4dd55f5 | 2009-03-11 20:50:30 +0000 | [diff] [blame] | 5289 | Declarator &D, Expr *BitWidth, |
| 5290 | AccessSpecifier AS) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5291 | IdentifierInfo *II = D.getIdentifier(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5292 | SourceLocation Loc = DeclStart; |
| 5293 | if (II) Loc = D.getIdentifierLoc(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5294 | |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 5295 | TypeSourceInfo *TInfo = 0; |
| 5296 | QualType T = GetTypeForDeclarator(D, S, &TInfo); |
Chris Lattner | 6491f47 | 2009-04-12 22:15:02 +0000 | [diff] [blame] | 5297 | if (getLangOptions().CPlusPlus) |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 5298 | CheckExtraCXXDefaultArguments(D); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 5299 | |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 5300 | DiagnoseFunctionSpecifiers(D); |
| 5301 | |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 5302 | if (D.getDeclSpec().isThreadSpecified()) |
| 5303 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_invalid_thread); |
| 5304 | |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 5305 | NamedDecl *PrevDecl = LookupSingleName(S, II, LookupMemberName, |
John McCall | 7d384dd | 2009-11-18 07:57:50 +0000 | [diff] [blame] | 5306 | ForRedeclaration); |
Douglas Gregor | c19ee3e | 2009-06-17 23:37:01 +0000 | [diff] [blame] | 5307 | |
| 5308 | if (PrevDecl && PrevDecl->isTemplateParameter()) { |
| 5309 | // Maybe we will complain about the shadowed template parameter. |
| 5310 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl); |
| 5311 | // Just pretend that we didn't see the previous declaration. |
| 5312 | PrevDecl = 0; |
| 5313 | } |
| 5314 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 5315 | if (PrevDecl && !isDeclInScope(PrevDecl, Record, S)) |
| 5316 | PrevDecl = 0; |
| 5317 | |
Steve Naroff | ea218b8 | 2009-07-14 14:58:18 +0000 | [diff] [blame] | 5318 | bool Mutable |
| 5319 | = (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_mutable); |
| 5320 | SourceLocation TSSL = D.getSourceRange().getBegin(); |
| 5321 | FieldDecl *NewFD |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 5322 | = CheckFieldDecl(II, T, TInfo, Record, Loc, Mutable, BitWidth, TSSL, |
Steve Naroff | ea218b8 | 2009-07-14 14:58:18 +0000 | [diff] [blame] | 5323 | AS, PrevDecl, &D); |
Rafael Espindola | 0162070 | 2010-03-21 22:56:43 +0000 | [diff] [blame] | 5324 | |
| 5325 | if (NewFD->isInvalidDecl()) |
| 5326 | Record->setInvalidDecl(); |
| 5327 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 5328 | if (NewFD->isInvalidDecl() && PrevDecl) { |
| 5329 | // Don't introduce NewFD into scope; there's already something |
| 5330 | // with the same name in the same scope. |
| 5331 | } else if (II) { |
| 5332 | PushOnScopeChains(NewFD, S); |
| 5333 | } else |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 5334 | Record->addDecl(NewFD); |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 5335 | |
| 5336 | return NewFD; |
| 5337 | } |
| 5338 | |
| 5339 | /// \brief Build a new FieldDecl and check its well-formedness. |
| 5340 | /// |
| 5341 | /// This routine builds a new FieldDecl given the fields name, type, |
| 5342 | /// record, etc. \p PrevDecl should refer to any previous declaration |
| 5343 | /// with the same name and in the same scope as the field to be |
| 5344 | /// created. |
| 5345 | /// |
| 5346 | /// \returns a new FieldDecl. |
| 5347 | /// |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5348 | /// \todo The Declarator argument is a hack. It will be removed once |
Argyrios Kyrtzidis | a1d5662 | 2009-08-19 01:27:57 +0000 | [diff] [blame] | 5349 | FieldDecl *Sema::CheckFieldDecl(DeclarationName Name, QualType T, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 5350 | TypeSourceInfo *TInfo, |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 5351 | RecordDecl *Record, SourceLocation Loc, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5352 | bool Mutable, Expr *BitWidth, |
Steve Naroff | ea218b8 | 2009-07-14 14:58:18 +0000 | [diff] [blame] | 5353 | SourceLocation TSSL, |
Douglas Gregor | 4dd55f5 | 2009-03-11 20:50:30 +0000 | [diff] [blame] | 5354 | AccessSpecifier AS, NamedDecl *PrevDecl, |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 5355 | Declarator *D) { |
| 5356 | IdentifierInfo *II = Name.getAsIdentifierInfo(); |
Steve Naroff | 5912a35 | 2007-08-28 20:14:24 +0000 | [diff] [blame] | 5357 | bool InvalidDecl = false; |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 5358 | if (D) InvalidDecl = D->isInvalidType(); |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 5359 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 5360 | // If we receive a broken type, recover by assuming 'int' and |
| 5361 | // marking this declaration as invalid. |
| 5362 | if (T.isNull()) { |
| 5363 | InvalidDecl = true; |
| 5364 | T = Context.IntTy; |
| 5365 | } |
| 5366 | |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 5367 | QualType EltTy = Context.getBaseElementType(T); |
| 5368 | if (!EltTy->isDependentType() && |
| 5369 | RequireCompleteType(Loc, EltTy, diag::err_field_incomplete)) |
| 5370 | InvalidDecl = true; |
| 5371 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5372 | // C99 6.7.2.1p8: A member of a structure or union may have any type other |
| 5373 | // than a variably modified type. |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 5374 | if (!InvalidDecl && T->isVariablyModifiedType()) { |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 5375 | bool SizeIsNegative; |
| 5376 | QualType FixedTy = TryToFixInvalidVariablyModifiedType(T, Context, |
| 5377 | SizeIsNegative); |
| 5378 | if (!FixedTy.isNull()) { |
| 5379 | Diag(Loc, diag::warn_illegal_constant_array_size); |
| 5380 | T = FixedTy; |
| 5381 | } else { |
| 5382 | if (SizeIsNegative) |
| 5383 | Diag(Loc, diag::err_typecheck_negative_array_size); |
| 5384 | else |
| 5385 | Diag(Loc, diag::err_typecheck_field_variable_size); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 5386 | InvalidDecl = true; |
| 5387 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5388 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5389 | |
Anders Carlsson | 4681ebd | 2009-03-22 20:18:17 +0000 | [diff] [blame] | 5390 | // Fields can not have abstract class types |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 5391 | if (!InvalidDecl && RequireNonAbstractType(Loc, T, |
| 5392 | diag::err_abstract_type_in_decl, |
| 5393 | AbstractFieldType)) |
Anders Carlsson | 4681ebd | 2009-03-22 20:18:17 +0000 | [diff] [blame] | 5394 | InvalidDecl = true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5395 | |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 5396 | bool ZeroWidth = false; |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 5397 | // If this is declared as a bit-field, check the bit-field. |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 5398 | if (!InvalidDecl && BitWidth && |
| 5399 | VerifyBitField(Loc, II, T, BitWidth, &ZeroWidth)) { |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 5400 | InvalidDecl = true; |
| 5401 | DeleteExpr(BitWidth); |
| 5402 | BitWidth = 0; |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 5403 | ZeroWidth = false; |
Anders Carlsson | 9f1e572 | 2008-12-06 20:33:04 +0000 | [diff] [blame] | 5404 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5405 | |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 5406 | FieldDecl *NewFD = FieldDecl::Create(Context, Record, Loc, II, T, TInfo, |
Argyrios Kyrtzidis | a5d8200 | 2009-08-21 00:31:54 +0000 | [diff] [blame] | 5407 | BitWidth, Mutable); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 5408 | if (InvalidDecl) |
| 5409 | NewFD->setInvalidDecl(); |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 5410 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 5411 | if (PrevDecl && !isa<TagDecl>(PrevDecl)) { |
| 5412 | Diag(Loc, diag::err_duplicate_member) << II; |
| 5413 | Diag(PrevDecl->getLocation(), diag::note_previous_declaration); |
| 5414 | NewFD->setInvalidDecl(); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 5415 | } |
| 5416 | |
John McCall | 86ff308 | 2010-02-04 22:26:26 +0000 | [diff] [blame] | 5417 | if (!InvalidDecl && getLangOptions().CPlusPlus) { |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 5418 | CXXRecordDecl* CXXRecord = cast<CXXRecordDecl>(Record); |
| 5419 | |
| 5420 | if (!T->isPODType()) |
| 5421 | CXXRecord->setPOD(false); |
| 5422 | if (!ZeroWidth) |
| 5423 | CXXRecord->setEmpty(false); |
| 5424 | |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 5425 | if (const RecordType *RT = EltTy->getAs<RecordType>()) { |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 5426 | CXXRecordDecl* RDecl = cast<CXXRecordDecl>(RT->getDecl()); |
| 5427 | |
| 5428 | if (!RDecl->hasTrivialConstructor()) |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 5429 | CXXRecord->setHasTrivialConstructor(false); |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 5430 | if (!RDecl->hasTrivialCopyConstructor()) |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 5431 | CXXRecord->setHasTrivialCopyConstructor(false); |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 5432 | if (!RDecl->hasTrivialCopyAssignment()) |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 5433 | CXXRecord->setHasTrivialCopyAssignment(false); |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 5434 | if (!RDecl->hasTrivialDestructor()) |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 5435 | CXXRecord->setHasTrivialDestructor(false); |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 5436 | |
| 5437 | // C++ 9.5p1: An object of a class with a non-trivial |
| 5438 | // constructor, a non-trivial copy constructor, a non-trivial |
| 5439 | // destructor, or a non-trivial copy assignment operator |
| 5440 | // cannot be a member of a union, nor can an array of such |
| 5441 | // objects. |
| 5442 | // TODO: C++0x alters this restriction significantly. |
| 5443 | if (Record->isUnion()) { |
| 5444 | // We check for copy constructors before constructors |
| 5445 | // because otherwise we'll never get complaints about |
| 5446 | // copy constructors. |
| 5447 | |
| 5448 | const CXXSpecialMember invalid = (CXXSpecialMember) -1; |
| 5449 | |
| 5450 | CXXSpecialMember member; |
| 5451 | if (!RDecl->hasTrivialCopyConstructor()) |
| 5452 | member = CXXCopyConstructor; |
| 5453 | else if (!RDecl->hasTrivialConstructor()) |
| 5454 | member = CXXDefaultConstructor; |
| 5455 | else if (!RDecl->hasTrivialCopyAssignment()) |
| 5456 | member = CXXCopyAssignment; |
| 5457 | else if (!RDecl->hasTrivialDestructor()) |
| 5458 | member = CXXDestructor; |
| 5459 | else |
| 5460 | member = invalid; |
| 5461 | |
| 5462 | if (member != invalid) { |
| 5463 | Diag(Loc, diag::err_illegal_union_member) << Name << member; |
| 5464 | DiagnoseNontrivial(RT, member); |
| 5465 | NewFD->setInvalidDecl(); |
| 5466 | } |
| 5467 | } |
| 5468 | } |
| 5469 | } |
| 5470 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 5471 | // FIXME: We need to pass in the attributes given an AST |
| 5472 | // representation, not a parser representation. |
| 5473 | if (D) |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 5474 | // FIXME: What to pass instead of TUScope? |
| 5475 | ProcessDeclAttributes(TUScope, NewFD, *D); |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 5476 | |
Fariborz Jahanian | f6123ca | 2009-02-19 00:22:47 +0000 | [diff] [blame] | 5477 | if (T.isObjCGCWeak()) |
Fariborz Jahanian | ed7e9ef | 2009-02-18 18:14:41 +0000 | [diff] [blame] | 5478 | Diag(Loc, diag::warn_attribute_weak_on_field); |
Anders Carlsson | ad14806 | 2008-02-16 00:29:18 +0000 | [diff] [blame] | 5479 | |
Douglas Gregor | 4dd55f5 | 2009-03-11 20:50:30 +0000 | [diff] [blame] | 5480 | NewFD->setAccess(AS); |
| 5481 | |
| 5482 | // C++ [dcl.init.aggr]p1: |
| 5483 | // An aggregate is an array or a class (clause 9) with [...] no |
| 5484 | // private or protected non-static data members (clause 11). |
| 5485 | // A POD must be an aggregate. |
| 5486 | if (getLangOptions().CPlusPlus && |
| 5487 | (AS == AS_private || AS == AS_protected)) { |
| 5488 | CXXRecordDecl *CXXRecord = cast<CXXRecordDecl>(Record); |
| 5489 | CXXRecord->setAggregate(false); |
| 5490 | CXXRecord->setPOD(false); |
| 5491 | } |
| 5492 | |
Steve Naroff | 5912a35 | 2007-08-28 20:14:24 +0000 | [diff] [blame] | 5493 | return NewFD; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5494 | } |
| 5495 | |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 5496 | /// DiagnoseNontrivial - Given that a class has a non-trivial |
| 5497 | /// special member, figure out why. |
| 5498 | void Sema::DiagnoseNontrivial(const RecordType* T, CXXSpecialMember member) { |
| 5499 | QualType QT(T, 0U); |
| 5500 | CXXRecordDecl* RD = cast<CXXRecordDecl>(T->getDecl()); |
| 5501 | |
| 5502 | // Check whether the member was user-declared. |
| 5503 | switch (member) { |
| 5504 | case CXXDefaultConstructor: |
| 5505 | if (RD->hasUserDeclaredConstructor()) { |
| 5506 | typedef CXXRecordDecl::ctor_iterator ctor_iter; |
Sebastian Redl | 38fd4d0 | 2009-10-25 22:31:45 +0000 | [diff] [blame] | 5507 | for (ctor_iter ci = RD->ctor_begin(), ce = RD->ctor_end(); ci != ce;++ci){ |
| 5508 | const FunctionDecl *body = 0; |
| 5509 | ci->getBody(body); |
| 5510 | if (!body || |
| 5511 | !cast<CXXConstructorDecl>(body)->isImplicitlyDefined(Context)) { |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 5512 | SourceLocation CtorLoc = ci->getLocation(); |
| 5513 | Diag(CtorLoc, diag::note_nontrivial_user_defined) << QT << member; |
| 5514 | return; |
| 5515 | } |
Sebastian Redl | 38fd4d0 | 2009-10-25 22:31:45 +0000 | [diff] [blame] | 5516 | } |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 5517 | |
| 5518 | assert(0 && "found no user-declared constructors"); |
| 5519 | return; |
| 5520 | } |
| 5521 | break; |
| 5522 | |
| 5523 | case CXXCopyConstructor: |
| 5524 | if (RD->hasUserDeclaredCopyConstructor()) { |
| 5525 | SourceLocation CtorLoc = |
| 5526 | RD->getCopyConstructor(Context, 0)->getLocation(); |
| 5527 | Diag(CtorLoc, diag::note_nontrivial_user_defined) << QT << member; |
| 5528 | return; |
| 5529 | } |
| 5530 | break; |
| 5531 | |
| 5532 | case CXXCopyAssignment: |
| 5533 | if (RD->hasUserDeclaredCopyAssignment()) { |
| 5534 | // FIXME: this should use the location of the copy |
| 5535 | // assignment, not the type. |
| 5536 | SourceLocation TyLoc = RD->getSourceRange().getBegin(); |
| 5537 | Diag(TyLoc, diag::note_nontrivial_user_defined) << QT << member; |
| 5538 | return; |
| 5539 | } |
| 5540 | break; |
| 5541 | |
| 5542 | case CXXDestructor: |
| 5543 | if (RD->hasUserDeclaredDestructor()) { |
| 5544 | SourceLocation DtorLoc = RD->getDestructor(Context)->getLocation(); |
| 5545 | Diag(DtorLoc, diag::note_nontrivial_user_defined) << QT << member; |
| 5546 | return; |
| 5547 | } |
| 5548 | break; |
| 5549 | } |
| 5550 | |
| 5551 | typedef CXXRecordDecl::base_class_iterator base_iter; |
| 5552 | |
| 5553 | // Virtual bases and members inhibit trivial copying/construction, |
| 5554 | // but not trivial destruction. |
| 5555 | if (member != CXXDestructor) { |
| 5556 | // Check for virtual bases. vbases includes indirect virtual bases, |
| 5557 | // so we just iterate through the direct bases. |
| 5558 | for (base_iter bi = RD->bases_begin(), be = RD->bases_end(); bi != be; ++bi) |
| 5559 | if (bi->isVirtual()) { |
| 5560 | SourceLocation BaseLoc = bi->getSourceRange().getBegin(); |
| 5561 | Diag(BaseLoc, diag::note_nontrivial_has_virtual) << QT << 1; |
| 5562 | return; |
| 5563 | } |
| 5564 | |
| 5565 | // Check for virtual methods. |
| 5566 | typedef CXXRecordDecl::method_iterator meth_iter; |
| 5567 | for (meth_iter mi = RD->method_begin(), me = RD->method_end(); mi != me; |
| 5568 | ++mi) { |
| 5569 | if (mi->isVirtual()) { |
| 5570 | SourceLocation MLoc = mi->getSourceRange().getBegin(); |
| 5571 | Diag(MLoc, diag::note_nontrivial_has_virtual) << QT << 0; |
| 5572 | return; |
| 5573 | } |
| 5574 | } |
| 5575 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5576 | |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 5577 | bool (CXXRecordDecl::*hasTrivial)() const; |
| 5578 | switch (member) { |
| 5579 | case CXXDefaultConstructor: |
| 5580 | hasTrivial = &CXXRecordDecl::hasTrivialConstructor; break; |
| 5581 | case CXXCopyConstructor: |
| 5582 | hasTrivial = &CXXRecordDecl::hasTrivialCopyConstructor; break; |
| 5583 | case CXXCopyAssignment: |
| 5584 | hasTrivial = &CXXRecordDecl::hasTrivialCopyAssignment; break; |
| 5585 | case CXXDestructor: |
| 5586 | hasTrivial = &CXXRecordDecl::hasTrivialDestructor; break; |
| 5587 | default: |
| 5588 | assert(0 && "unexpected special member"); return; |
| 5589 | } |
| 5590 | |
| 5591 | // Check for nontrivial bases (and recurse). |
| 5592 | 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] | 5593 | const RecordType *BaseRT = bi->getType()->getAs<RecordType>(); |
Sebastian Redl | 9994a34 | 2009-10-25 17:03:50 +0000 | [diff] [blame] | 5594 | assert(BaseRT && "Don't know how to handle dependent bases"); |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 5595 | CXXRecordDecl *BaseRecTy = cast<CXXRecordDecl>(BaseRT->getDecl()); |
| 5596 | if (!(BaseRecTy->*hasTrivial)()) { |
| 5597 | SourceLocation BaseLoc = bi->getSourceRange().getBegin(); |
| 5598 | Diag(BaseLoc, diag::note_nontrivial_has_nontrivial) << QT << 1 << member; |
| 5599 | DiagnoseNontrivial(BaseRT, member); |
| 5600 | return; |
| 5601 | } |
| 5602 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5603 | |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 5604 | // Check for nontrivial members (and recurse). |
| 5605 | typedef RecordDecl::field_iterator field_iter; |
| 5606 | for (field_iter fi = RD->field_begin(), fe = RD->field_end(); fi != fe; |
| 5607 | ++fi) { |
Douglas Gregor | 5e03f9e | 2009-07-23 23:49:00 +0000 | [diff] [blame] | 5608 | QualType EltTy = Context.getBaseElementType((*fi)->getType()); |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 5609 | if (const RecordType *EltRT = EltTy->getAs<RecordType>()) { |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 5610 | CXXRecordDecl* EltRD = cast<CXXRecordDecl>(EltRT->getDecl()); |
| 5611 | |
| 5612 | if (!(EltRD->*hasTrivial)()) { |
| 5613 | SourceLocation FLoc = (*fi)->getLocation(); |
| 5614 | Diag(FLoc, diag::note_nontrivial_has_nontrivial) << QT << 0 << member; |
| 5615 | DiagnoseNontrivial(EltRT, member); |
| 5616 | return; |
| 5617 | } |
| 5618 | } |
| 5619 | } |
| 5620 | |
| 5621 | assert(0 && "found no explanation for non-trivial member"); |
| 5622 | } |
| 5623 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5624 | /// TranslateIvarVisibility - Translate visibility from a token ID to an |
Fariborz Jahanian | 89204a1 | 2007-10-01 16:53:59 +0000 | [diff] [blame] | 5625 | /// AST enum value. |
Ted Kremenek | a526c5c | 2008-01-07 19:49:32 +0000 | [diff] [blame] | 5626 | static ObjCIvarDecl::AccessControl |
Fariborz Jahanian | 89204a1 | 2007-10-01 16:53:59 +0000 | [diff] [blame] | 5627 | TranslateIvarVisibility(tok::ObjCKeywordKind ivarVisibility) { |
Steve Naroff | f13271f | 2007-09-14 23:09:53 +0000 | [diff] [blame] | 5628 | switch (ivarVisibility) { |
Chris Lattner | 33d34a6 | 2008-10-12 00:28:42 +0000 | [diff] [blame] | 5629 | default: assert(0 && "Unknown visitibility kind"); |
| 5630 | case tok::objc_private: return ObjCIvarDecl::Private; |
| 5631 | case tok::objc_public: return ObjCIvarDecl::Public; |
| 5632 | case tok::objc_protected: return ObjCIvarDecl::Protected; |
| 5633 | case tok::objc_package: return ObjCIvarDecl::Package; |
Steve Naroff | f13271f | 2007-09-14 23:09:53 +0000 | [diff] [blame] | 5634 | } |
| 5635 | } |
| 5636 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5637 | /// 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] | 5638 | /// in order to create an IvarDecl object for it. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 5639 | Sema::DeclPtrTy Sema::ActOnIvar(Scope *S, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5640 | SourceLocation DeclStart, |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 5641 | DeclPtrTy IntfDecl, |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 5642 | Declarator &D, ExprTy *BitfieldWidth, |
| 5643 | tok::ObjCKeywordKind Visibility) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5644 | |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 5645 | IdentifierInfo *II = D.getIdentifier(); |
| 5646 | Expr *BitWidth = (Expr*)BitfieldWidth; |
| 5647 | SourceLocation Loc = DeclStart; |
| 5648 | if (II) Loc = D.getIdentifierLoc(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5649 | |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 5650 | // FIXME: Unnamed fields can be handled in various different ways, for |
| 5651 | // example, unnamed unions inject all members into the struct namespace! |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5652 | |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 5653 | TypeSourceInfo *TInfo = 0; |
| 5654 | QualType T = GetTypeForDeclarator(D, S, &TInfo); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5655 | |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 5656 | if (BitWidth) { |
Steve Naroff | 63359c8 | 2009-02-20 17:57:11 +0000 | [diff] [blame] | 5657 | // 6.7.2.1p3, 6.7.2.1p4 |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 5658 | if (VerifyBitField(Loc, II, T, BitWidth)) { |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 5659 | D.setInvalidType(); |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 5660 | DeleteExpr(BitWidth); |
| 5661 | BitWidth = 0; |
| 5662 | } |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 5663 | } else { |
| 5664 | // Not a bitfield. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5665 | |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 5666 | // validate II. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5667 | |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 5668 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5669 | |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 5670 | // C99 6.7.2.1p8: A member of a structure or union may have any type other |
| 5671 | // than a variably modified type. |
| 5672 | if (T->isVariablyModifiedType()) { |
Anders Carlsson | 96e05bc | 2008-12-07 00:20:55 +0000 | [diff] [blame] | 5673 | Diag(Loc, diag::err_typecheck_ivar_variable_size); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 5674 | D.setInvalidType(); |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 5675 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5676 | |
Ted Kremenek | b8db21d | 2008-07-23 18:04:17 +0000 | [diff] [blame] | 5677 | // Get the visibility (access control) for this ivar. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5678 | ObjCIvarDecl::AccessControl ac = |
Ted Kremenek | b8db21d | 2008-07-23 18:04:17 +0000 | [diff] [blame] | 5679 | Visibility != tok::objc_not_keyword ? TranslateIvarVisibility(Visibility) |
| 5680 | : ObjCIvarDecl::None; |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 5681 | // Must set ivar's DeclContext to its enclosing interface. |
| 5682 | Decl *EnclosingDecl = IntfDecl.getAs<Decl>(); |
| 5683 | DeclContext *EnclosingContext; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5684 | if (ObjCImplementationDecl *IMPDecl = |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 5685 | dyn_cast<ObjCImplementationDecl>(EnclosingDecl)) { |
| 5686 | // Case of ivar declared in an implementation. Context is that of its class. |
| 5687 | ObjCInterfaceDecl* IDecl = IMPDecl->getClassInterface(); |
| 5688 | assert(IDecl && "No class- ActOnIvar"); |
| 5689 | EnclosingContext = cast_or_null<DeclContext>(IDecl); |
Mike Stump | ac5fc7c | 2009-08-04 21:02:39 +0000 | [diff] [blame] | 5690 | } else |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 5691 | EnclosingContext = dyn_cast<DeclContext>(EnclosingDecl); |
| 5692 | assert(EnclosingContext && "null DeclContext for ivar - ActOnIvar"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5693 | |
Ted Kremenek | b8db21d | 2008-07-23 18:04:17 +0000 | [diff] [blame] | 5694 | // Construct the decl. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5695 | ObjCIvarDecl *NewID = ObjCIvarDecl::Create(Context, |
Argyrios Kyrtzidis | a1d5662 | 2009-08-19 01:27:57 +0000 | [diff] [blame] | 5696 | EnclosingContext, Loc, II, T, |
John McCall | a93c934 | 2009-12-07 02:54:59 +0000 | [diff] [blame] | 5697 | TInfo, ac, (Expr *)BitfieldWidth); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5698 | |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 5699 | if (II) { |
John McCall | a24dc2e | 2009-11-17 02:14:36 +0000 | [diff] [blame] | 5700 | NamedDecl *PrevDecl = LookupSingleName(S, II, LookupMemberName, |
John McCall | 7d384dd | 2009-11-18 07:57:50 +0000 | [diff] [blame] | 5701 | ForRedeclaration); |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 5702 | if (PrevDecl && isDeclInScope(PrevDecl, EnclosingContext, S) |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 5703 | && !isa<TagDecl>(PrevDecl)) { |
| 5704 | Diag(Loc, diag::err_duplicate_member) << II; |
| 5705 | Diag(PrevDecl->getLocation(), diag::note_previous_declaration); |
| 5706 | NewID->setInvalidDecl(); |
| 5707 | } |
| 5708 | } |
| 5709 | |
Ted Kremenek | b8db21d | 2008-07-23 18:04:17 +0000 | [diff] [blame] | 5710 | // Process attributes attached to the ivar. |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 5711 | ProcessDeclAttributes(S, NewID, D); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5712 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 5713 | if (D.isInvalidType()) |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 5714 | NewID->setInvalidDecl(); |
Ted Kremenek | b8db21d | 2008-07-23 18:04:17 +0000 | [diff] [blame] | 5715 | |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 5716 | if (II) { |
| 5717 | // FIXME: When interfaces are DeclContexts, we'll need to add |
| 5718 | // these to the interface. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 5719 | S->AddDecl(DeclPtrTy::make(NewID)); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 5720 | IdResolver.AddDecl(NewID); |
| 5721 | } |
| 5722 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 5723 | return DeclPtrTy::make(NewID); |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 5724 | } |
| 5725 | |
Fariborz Jahanian | 9d048ff | 2007-09-29 00:54:24 +0000 | [diff] [blame] | 5726 | void Sema::ActOnFields(Scope* S, |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 5727 | SourceLocation RecLoc, DeclPtrTy RecDecl, |
| 5728 | DeclPtrTy *Fields, unsigned NumFields, |
Daniel Dunbar | 1bfe1c2 | 2008-10-03 02:03:53 +0000 | [diff] [blame] | 5729 | SourceLocation LBrac, SourceLocation RBrac, |
Daniel Dunbar | 7d07664 | 2008-10-03 17:33:35 +0000 | [diff] [blame] | 5730 | AttributeList *Attr) { |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 5731 | Decl *EnclosingDecl = RecDecl.getAs<Decl>(); |
Steve Naroff | 7421664 | 2007-09-14 22:20:54 +0000 | [diff] [blame] | 5732 | assert(EnclosingDecl && "missing record or interface decl"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5733 | |
Chris Lattner | 1829a6d | 2009-02-23 22:00:08 +0000 | [diff] [blame] | 5734 | // If the decl this is being inserted into is invalid, then it may be a |
| 5735 | // redeclaration or some other bogus case. Don't try to add fields to it. |
| 5736 | if (EnclosingDecl->isInvalidDecl()) { |
| 5737 | // FIXME: Deallocate fields? |
| 5738 | return; |
| 5739 | } |
| 5740 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5741 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5742 | // Verify that all the fields are okay. |
| 5743 | unsigned NumNamedMembers = 0; |
| 5744 | llvm::SmallVector<FieldDecl*, 32> RecFields; |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 5745 | |
Chris Lattner | 1829a6d | 2009-02-23 22:00:08 +0000 | [diff] [blame] | 5746 | RecordDecl *Record = dyn_cast<RecordDecl>(EnclosingDecl); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5747 | for (unsigned i = 0; i != NumFields; ++i) { |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 5748 | FieldDecl *FD = cast<FieldDecl>(Fields[i].getAs<Decl>()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5749 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5750 | // Get the type for the field. |
Chris Lattner | 02c642e | 2007-07-31 21:33:24 +0000 | [diff] [blame] | 5751 | Type *FDTy = FD->getType().getTypePtr(); |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 5752 | |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 5753 | if (!FD->isAnonymousStructOrUnion()) { |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 5754 | // Remember all fields written by the user. |
| 5755 | RecFields.push_back(FD); |
| 5756 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5757 | |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 5758 | // If the field is already invalid for some reason, don't emit more |
| 5759 | // diagnostics about it. |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 5760 | if (FD->isInvalidDecl()) { |
| 5761 | EnclosingDecl->setInvalidDecl(); |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 5762 | continue; |
Eli Friedman | 721e77d | 2009-12-07 00:22:08 +0000 | [diff] [blame] | 5763 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5764 | |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 5765 | // C99 6.7.2.1p2: |
| 5766 | // A structure or union shall not contain a member with |
| 5767 | // incomplete or function type (hence, a structure shall not |
| 5768 | // contain an instance of itself, but may contain a pointer to |
| 5769 | // an instance of itself), except that the last member of a |
| 5770 | // structure with more than one named member may have incomplete |
| 5771 | // array type; such a structure (and any union containing, |
| 5772 | // possibly recursively, a member that is such a structure) |
| 5773 | // shall not be a member of a structure or an element of an |
| 5774 | // array. |
Chris Lattner | 02c642e | 2007-07-31 21:33:24 +0000 | [diff] [blame] | 5775 | if (FDTy->isFunctionType()) { |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 5776 | // Field declared as a function. |
Chris Lattner | f3a41af | 2008-11-20 06:38:18 +0000 | [diff] [blame] | 5777 | Diag(FD->getLocation(), diag::err_field_declared_as_function) |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 5778 | << FD->getDeclName(); |
Steve Naroff | 7421664 | 2007-09-14 22:20:54 +0000 | [diff] [blame] | 5779 | FD->setInvalidDecl(); |
| 5780 | EnclosingDecl->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5781 | continue; |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 5782 | } else if (FDTy->isIncompleteArrayType() && i == NumFields - 1 && |
| 5783 | Record && Record->isStruct()) { |
| 5784 | // Flexible array member. |
| 5785 | if (NumNamedMembers < 1) { |
Chris Lattner | f3a41af | 2008-11-20 06:38:18 +0000 | [diff] [blame] | 5786 | Diag(FD->getLocation(), diag::err_flexible_array_empty_struct) |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 5787 | << FD->getDeclName(); |
Steve Naroff | 7421664 | 2007-09-14 22:20:54 +0000 | [diff] [blame] | 5788 | FD->setInvalidDecl(); |
| 5789 | EnclosingDecl->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5790 | continue; |
| 5791 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5792 | // 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] | 5793 | if (Record) |
| 5794 | Record->setHasFlexibleArrayMember(true); |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 5795 | } else if (!FDTy->isDependentType() && |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5796 | RequireCompleteType(FD->getLocation(), FD->getType(), |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 5797 | diag::err_field_incomplete)) { |
| 5798 | // Incomplete type |
| 5799 | FD->setInvalidDecl(); |
| 5800 | EnclosingDecl->setInvalidDecl(); |
| 5801 | continue; |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 5802 | } else if (const RecordType *FDTTy = FDTy->getAs<RecordType>()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5803 | if (FDTTy->getDecl()->hasFlexibleArrayMember()) { |
| 5804 | // 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] | 5805 | if (Record && Record->isUnion()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5806 | Record->setHasFlexibleArrayMember(true); |
| 5807 | } else { |
| 5808 | // If this is a struct/class and this is not the last element, reject |
| 5809 | // it. Note that GCC supports variable sized arrays in the middle of |
| 5810 | // structures. |
Douglas Gregor | e4f3e06 | 2009-03-06 23:41:27 +0000 | [diff] [blame] | 5811 | if (i != NumFields-1) |
| 5812 | Diag(FD->getLocation(), diag::ext_variable_sized_type_in_struct) |
Chris Lattner | 740782a | 2009-04-25 18:52:45 +0000 | [diff] [blame] | 5813 | << FD->getDeclName() << FD->getType(); |
Douglas Gregor | e4f3e06 | 2009-03-06 23:41:27 +0000 | [diff] [blame] | 5814 | else { |
| 5815 | // We support flexible arrays at the end of structs in |
| 5816 | // other structs as an extension. |
| 5817 | Diag(FD->getLocation(), diag::ext_flexible_array_in_struct) |
| 5818 | << FD->getDeclName(); |
| 5819 | if (Record) |
| 5820 | Record->setHasFlexibleArrayMember(true); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5821 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5822 | } |
| 5823 | } |
Fariborz Jahanian | 082b02e | 2009-07-08 01:18:33 +0000 | [diff] [blame] | 5824 | if (Record && FDTTy->getDecl()->hasObjectMember()) |
| 5825 | Record->setHasObjectMember(true); |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 5826 | } else if (FDTy->isObjCInterfaceType()) { |
| 5827 | /// A field cannot be an Objective-c object |
Steve Naroff | ccef371 | 2009-02-20 22:59:16 +0000 | [diff] [blame] | 5828 | Diag(FD->getLocation(), diag::err_statically_allocated_object); |
Fariborz Jahanian | e7f64cc | 2007-10-12 22:10:42 +0000 | [diff] [blame] | 5829 | FD->setInvalidDecl(); |
| 5830 | EnclosingDecl->setInvalidDecl(); |
| 5831 | continue; |
Mike Stump | ac5fc7c | 2009-08-04 21:02:39 +0000 | [diff] [blame] | 5832 | } else if (getLangOptions().ObjC1 && |
| 5833 | getLangOptions().getGCMode() != LangOptions::NonGC && |
| 5834 | Record && |
| 5835 | (FD->getType()->isObjCObjectPointerType() || |
| 5836 | FD->getType().isObjCGCStrong())) |
Fariborz Jahanian | 082b02e | 2009-07-08 01:18:33 +0000 | [diff] [blame] | 5837 | Record->setHasObjectMember(true); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5838 | // Keep track of the number of named members. |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 5839 | if (FD->getIdentifier()) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5840 | ++NumNamedMembers; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5841 | } |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 5842 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5843 | // Okay, we successfully defined 'Record'. |
Chris Lattner | e1e7985 | 2008-02-06 00:51:33 +0000 | [diff] [blame] | 5844 | if (Record) { |
Douglas Gregor | 838db38 | 2010-02-11 01:19:42 +0000 | [diff] [blame] | 5845 | Record->completeDefinition(); |
Chris Lattner | e1e7985 | 2008-02-06 00:51:33 +0000 | [diff] [blame] | 5846 | } else { |
Jay Foad | beaaccd | 2009-05-21 09:52:38 +0000 | [diff] [blame] | 5847 | ObjCIvarDecl **ClsFields = |
| 5848 | reinterpret_cast<ObjCIvarDecl**>(RecFields.data()); |
Fariborz Jahanian | 60f8c86 | 2008-12-13 20:28:25 +0000 | [diff] [blame] | 5849 | if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(EnclosingDecl)) { |
Chris Lattner | 38af2de | 2009-02-20 21:35:13 +0000 | [diff] [blame] | 5850 | ID->setLocEnd(RBrac); |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 5851 | // Add ivar's to class's DeclContext. |
| 5852 | for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { |
| 5853 | ClsFields[i]->setLexicalDeclContext(ID); |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 5854 | ID->addDecl(ClsFields[i]); |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 5855 | } |
Fariborz Jahanian | 3281eff | 2008-12-16 01:08:35 +0000 | [diff] [blame] | 5856 | // Must enforce the rule that ivars in the base classes may not be |
| 5857 | // duplicates. |
Fariborz Jahanian | f914b97 | 2010-02-23 23:41:11 +0000 | [diff] [blame] | 5858 | if (ID->getSuperClass()) |
| 5859 | DiagnoseDuplicateIvars(ID, ID->getSuperClass()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5860 | } else if (ObjCImplementationDecl *IMPDecl = |
Chris Lattner | 1829a6d | 2009-02-23 22:00:08 +0000 | [diff] [blame] | 5861 | dyn_cast<ObjCImplementationDecl>(EnclosingDecl)) { |
Ted Kremenek | a526c5c | 2008-01-07 19:49:32 +0000 | [diff] [blame] | 5862 | assert(IMPDecl && "ActOnFields - missing ObjCImplementationDecl"); |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 5863 | for (unsigned I = 0, N = RecFields.size(); I != N; ++I) |
| 5864 | // Ivar declared in @implementation never belongs to the implementation. |
| 5865 | // Only it is in implementation's lexical context. |
Douglas Gregor | 8f36aba | 2009-04-23 03:23:08 +0000 | [diff] [blame] | 5866 | ClsFields[I]->setLexicalDeclContext(IMPDecl); |
Fariborz Jahanian | 3a3ca1b | 2007-10-31 18:48:14 +0000 | [diff] [blame] | 5867 | CheckImplementationIvars(IMPDecl, ClsFields, RecFields.size(), RBrac); |
Fariborz Jahanian | 83c481a | 2010-02-22 23:04:20 +0000 | [diff] [blame] | 5868 | } else if (ObjCCategoryDecl *CDecl = |
| 5869 | dyn_cast<ObjCCategoryDecl>(EnclosingDecl)) { |
| 5870 | if (!LangOpts.ObjCNonFragileABI2 || !CDecl->IsClassExtension()) |
Fariborz Jahanian | f3c0bd5 | 2010-03-24 18:08:23 +0000 | [diff] [blame] | 5871 | Diag(LBrac, diag::err_misplaced_ivar) << CDecl->IsClassExtension(); |
Fariborz Jahanian | 83c481a | 2010-02-22 23:04:20 +0000 | [diff] [blame] | 5872 | else { |
| 5873 | // FIXME. Class extension does not have a LocEnd field. |
| 5874 | // CDecl->setLocEnd(RBrac); |
| 5875 | // Add ivar's to class extension's DeclContext. |
| 5876 | for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { |
| 5877 | ClsFields[i]->setLexicalDeclContext(CDecl); |
| 5878 | CDecl->addDecl(ClsFields[i]); |
| 5879 | } |
| 5880 | } |
Fariborz Jahanian | d0b90bf | 2007-09-26 18:27:25 +0000 | [diff] [blame] | 5881 | } |
Fariborz Jahanian | b04a021 | 2007-09-14 21:08:27 +0000 | [diff] [blame] | 5882 | } |
Daniel Dunbar | 7d07664 | 2008-10-03 17:33:35 +0000 | [diff] [blame] | 5883 | |
| 5884 | if (Attr) |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 5885 | ProcessDeclAttributeList(S, Record, Attr); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5886 | } |
| 5887 | |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 5888 | /// \brief Determine whether the given integral value is representable within |
| 5889 | /// the given type T. |
| 5890 | static bool isRepresentableIntegerValue(ASTContext &Context, |
| 5891 | llvm::APSInt &Value, |
| 5892 | QualType T) { |
| 5893 | assert(T->isIntegralType() && "Integral type required!"); |
| 5894 | unsigned BitWidth = Context.getTypeSize(T); |
| 5895 | |
| 5896 | if (Value.isUnsigned() || Value.isNonNegative()) |
| 5897 | return Value.getActiveBits() < BitWidth; |
| 5898 | |
| 5899 | return Value.getMinSignedBits() <= BitWidth; |
| 5900 | } |
| 5901 | |
| 5902 | // \brief Given an integral type, return the next larger integral type |
| 5903 | // (or a NULL type of no such type exists). |
| 5904 | static QualType getNextLargerIntegralType(ASTContext &Context, QualType T) { |
| 5905 | // FIXME: Int128/UInt128 support, which also needs to be introduced into |
| 5906 | // enum checking below. |
| 5907 | assert(T->isIntegralType() && "Integral type required!"); |
| 5908 | const unsigned NumTypes = 4; |
| 5909 | QualType SignedIntegralTypes[NumTypes] = { |
| 5910 | Context.ShortTy, Context.IntTy, Context.LongTy, Context.LongLongTy |
| 5911 | }; |
| 5912 | QualType UnsignedIntegralTypes[NumTypes] = { |
| 5913 | Context.UnsignedShortTy, Context.UnsignedIntTy, Context.UnsignedLongTy, |
| 5914 | Context.UnsignedLongLongTy |
| 5915 | }; |
| 5916 | |
| 5917 | unsigned BitWidth = Context.getTypeSize(T); |
| 5918 | QualType *Types = T->isSignedIntegerType()? SignedIntegralTypes |
| 5919 | : UnsignedIntegralTypes; |
| 5920 | for (unsigned I = 0; I != NumTypes; ++I) |
| 5921 | if (Context.getTypeSize(Types[I]) > BitWidth) |
| 5922 | return Types[I]; |
| 5923 | |
| 5924 | return QualType(); |
| 5925 | } |
| 5926 | |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 5927 | EnumConstantDecl *Sema::CheckEnumConstant(EnumDecl *Enum, |
| 5928 | EnumConstantDecl *LastEnumConst, |
| 5929 | SourceLocation IdLoc, |
| 5930 | IdentifierInfo *Id, |
| 5931 | ExprArg val) { |
| 5932 | Expr *Val = (Expr *)val.get(); |
| 5933 | |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 5934 | unsigned IntWidth = Context.Target.getIntWidth(); |
| 5935 | llvm::APSInt EnumVal(IntWidth); |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 5936 | QualType EltTy; |
Douglas Gregor | 4912c34 | 2009-11-06 00:03:12 +0000 | [diff] [blame] | 5937 | if (Val) { |
Douglas Gregor | 9b9edd6 | 2010-03-02 17:53:14 +0000 | [diff] [blame] | 5938 | if (Enum->isDependentType() || Val->isTypeDependent()) |
Douglas Gregor | 4912c34 | 2009-11-06 00:03:12 +0000 | [diff] [blame] | 5939 | EltTy = Context.DependentTy; |
| 5940 | else { |
Douglas Gregor | 4912c34 | 2009-11-06 00:03:12 +0000 | [diff] [blame] | 5941 | // C99 6.7.2.2p2: Make sure we have an integer constant expression. |
| 5942 | SourceLocation ExpLoc; |
Douglas Gregor | 9b9edd6 | 2010-03-02 17:53:14 +0000 | [diff] [blame] | 5943 | if (!Val->isValueDependent() && |
| 5944 | VerifyIntegerConstantExpression(Val, &EnumVal)) { |
Douglas Gregor | 4912c34 | 2009-11-06 00:03:12 +0000 | [diff] [blame] | 5945 | Val = 0; |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 5946 | } else { |
| 5947 | if (!getLangOptions().CPlusPlus) { |
| 5948 | // C99 6.7.2.2p2: |
| 5949 | // The expression that defines the value of an enumeration constant |
| 5950 | // shall be an integer constant expression that has a value |
| 5951 | // representable as an int. |
| 5952 | |
| 5953 | // Complain if the value is not representable in an int. |
| 5954 | if (!isRepresentableIntegerValue(Context, EnumVal, Context.IntTy)) |
| 5955 | Diag(IdLoc, diag::ext_enum_value_not_int) |
| 5956 | << EnumVal.toString(10) << Val->getSourceRange() |
Douglas Gregor | 19c1525 | 2010-02-17 22:40:11 +0000 | [diff] [blame] | 5957 | << (EnumVal.isUnsigned() || EnumVal.isNonNegative()); |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 5958 | else if (!Context.hasSameType(Val->getType(), Context.IntTy)) { |
| 5959 | // Force the type of the expression to 'int'. |
| 5960 | ImpCastExprToType(Val, Context.IntTy, CastExpr::CK_IntegralCast); |
| 5961 | |
| 5962 | if (Val != val.get()) { |
| 5963 | val.release(); |
| 5964 | val = Val; |
| 5965 | } |
| 5966 | } |
| 5967 | } |
| 5968 | |
| 5969 | // C++0x [dcl.enum]p5: |
| 5970 | // If the underlying type is not fixed, the type of each enumerator |
| 5971 | // is the type of its initializing value: |
| 5972 | // - If an initializer is specified for an enumerator, the |
| 5973 | // initializing value has the same type as the expression. |
Douglas Gregor | 4912c34 | 2009-11-06 00:03:12 +0000 | [diff] [blame] | 5974 | EltTy = Val->getType(); |
| 5975 | } |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 5976 | } |
| 5977 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 5978 | |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 5979 | if (!Val) { |
Eli Friedman | ed0716b | 2009-12-11 01:34:50 +0000 | [diff] [blame] | 5980 | if (Enum->isDependentType()) |
| 5981 | EltTy = Context.DependentTy; |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 5982 | else if (!LastEnumConst) { |
| 5983 | // C++0x [dcl.enum]p5: |
| 5984 | // If the underlying type is not fixed, the type of each enumerator |
| 5985 | // is the type of its initializing value: |
| 5986 | // - If no initializer is specified for the first enumerator, the |
| 5987 | // initializing value has an unspecified integral type. |
| 5988 | // |
| 5989 | // GCC uses 'int' for its unspecified integral type, as does |
| 5990 | // C99 6.7.2.2p3. |
| 5991 | EltTy = Context.IntTy; |
| 5992 | } else { |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 5993 | // Assign the last value + 1. |
| 5994 | EnumVal = LastEnumConst->getInitVal(); |
| 5995 | ++EnumVal; |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 5996 | EltTy = LastEnumConst->getType(); |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 5997 | |
| 5998 | // Check for overflow on increment. |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 5999 | if (EnumVal < LastEnumConst->getInitVal()) { |
| 6000 | // C++0x [dcl.enum]p5: |
| 6001 | // If the underlying type is not fixed, the type of each enumerator |
| 6002 | // is the type of its initializing value: |
| 6003 | // |
| 6004 | // - Otherwise the type of the initializing value is the same as |
| 6005 | // the type of the initializing value of the preceding enumerator |
| 6006 | // unless the incremented value is not representable in that type, |
| 6007 | // in which case the type is an unspecified integral type |
| 6008 | // sufficient to contain the incremented value. If no such type |
| 6009 | // exists, the program is ill-formed. |
| 6010 | QualType T = getNextLargerIntegralType(Context, EltTy); |
| 6011 | if (T.isNull()) { |
| 6012 | // There is no integral type larger enough to represent this |
| 6013 | // value. Complain, then allow the value to wrap around. |
| 6014 | EnumVal = LastEnumConst->getInitVal(); |
| 6015 | EnumVal.zext(EnumVal.getBitWidth() * 2); |
| 6016 | Diag(IdLoc, diag::warn_enumerator_too_large) |
| 6017 | << EnumVal.toString(10); |
| 6018 | } else { |
| 6019 | EltTy = T; |
| 6020 | } |
| 6021 | |
| 6022 | // Retrieve the last enumerator's value, extent that type to the |
| 6023 | // type that is supposed to be large enough to represent the incremented |
| 6024 | // value, then increment. |
| 6025 | EnumVal = LastEnumConst->getInitVal(); |
| 6026 | EnumVal.setIsSigned(EltTy->isSignedIntegerType()); |
| 6027 | EnumVal.zextOrTrunc(Context.getTypeSize(EltTy)); |
| 6028 | ++EnumVal; |
| 6029 | |
| 6030 | // If we're not in C++, diagnose the overflow of enumerator values, |
| 6031 | // which in C99 means that the enumerator value is not representable in |
| 6032 | // an int (C99 6.7.2.2p2). However, we support GCC's extension that |
| 6033 | // permits enumerator values that are representable in some larger |
| 6034 | // integral type. |
| 6035 | if (!getLangOptions().CPlusPlus && !T.isNull()) |
| 6036 | Diag(IdLoc, diag::warn_enum_value_overflow); |
| 6037 | } else if (!getLangOptions().CPlusPlus && |
| 6038 | !isRepresentableIntegerValue(Context, EnumVal, EltTy)) { |
| 6039 | // Enforce C99 6.7.2.2p2 even when we compute the next value. |
| 6040 | Diag(IdLoc, diag::ext_enum_value_not_int) |
| 6041 | << EnumVal.toString(10) << 1; |
| 6042 | } |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 6043 | } |
| 6044 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6045 | |
Douglas Gregor | 9b9edd6 | 2010-03-02 17:53:14 +0000 | [diff] [blame] | 6046 | if (!EltTy->isDependentType()) { |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 6047 | // Make the enumerator value match the signedness and size of the |
| 6048 | // enumerator's type. |
| 6049 | EnumVal.zextOrTrunc(Context.getTypeSize(EltTy)); |
| 6050 | EnumVal.setIsSigned(EltTy->isSignedIntegerType()); |
| 6051 | } |
Douglas Gregor | 4912c34 | 2009-11-06 00:03:12 +0000 | [diff] [blame] | 6052 | |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 6053 | val.release(); |
| 6054 | return EnumConstantDecl::Create(Context, Enum, IdLoc, Id, EltTy, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6055 | Val, EnumVal); |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 6056 | } |
| 6057 | |
| 6058 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 6059 | Sema::DeclPtrTy Sema::ActOnEnumConstant(Scope *S, DeclPtrTy theEnumDecl, |
| 6060 | DeclPtrTy lastEnumConst, |
| 6061 | SourceLocation IdLoc, |
| 6062 | IdentifierInfo *Id, |
| 6063 | SourceLocation EqualLoc, ExprTy *val) { |
| 6064 | EnumDecl *TheEnumDecl = cast<EnumDecl>(theEnumDecl.getAs<Decl>()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6065 | EnumConstantDecl *LastEnumConst = |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 6066 | cast_or_null<EnumConstantDecl>(lastEnumConst.getAs<Decl>()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6067 | Expr *Val = static_cast<Expr*>(val); |
| 6068 | |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 6069 | // The scope passed in may not be a decl scope. Zip up the scope tree until |
| 6070 | // we find one that is. |
Douglas Gregor | 1a0d31a | 2009-01-12 18:45:55 +0000 | [diff] [blame] | 6071 | S = getNonFieldDeclScope(S); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6072 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6073 | // Verify that there isn't already something declared with this name in this |
| 6074 | // scope. |
Douglas Gregor | e39fe72 | 2010-01-19 06:06:57 +0000 | [diff] [blame] | 6075 | NamedDecl *PrevDecl = LookupSingleName(S, Id, LookupOrdinaryName, |
| 6076 | ForRedeclaration); |
Douglas Gregor | f57172b | 2008-12-08 18:40:42 +0000 | [diff] [blame] | 6077 | if (PrevDecl && PrevDecl->isTemplateParameter()) { |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 6078 | // Maybe we will complain about the shadowed template parameter. |
| 6079 | DiagnoseTemplateParameterShadow(IdLoc, PrevDecl); |
| 6080 | // Just pretend that we didn't see the previous declaration. |
| 6081 | PrevDecl = 0; |
| 6082 | } |
| 6083 | |
| 6084 | if (PrevDecl) { |
Argyrios Kyrtzidis | 0ff12f0 | 2008-07-16 21:01:53 +0000 | [diff] [blame] | 6085 | // When in C++, we may get a TagDecl with the same name; in this case the |
| 6086 | // enum constant will 'hide' the tag. |
| 6087 | assert((getLangOptions().CPlusPlus || !isa<TagDecl>(PrevDecl)) && |
| 6088 | "Received TagDecl when not in C++!"); |
Argyrios Kyrtzidis | 15a12d0 | 2008-09-09 21:18:04 +0000 | [diff] [blame] | 6089 | if (!isa<TagDecl>(PrevDecl) && isDeclInScope(PrevDecl, CurContext, S)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6090 | if (isa<EnumConstantDecl>(PrevDecl)) |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 6091 | Diag(IdLoc, diag::err_redefinition_of_enumerator) << Id; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6092 | else |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 6093 | Diag(IdLoc, diag::err_redefinition) << Id; |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 6094 | Diag(PrevDecl->getLocation(), diag::note_previous_definition); |
Chris Lattner | f306f86 | 2009-02-28 19:37:57 +0000 | [diff] [blame] | 6095 | if (Val) Val->Destroy(Context); |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 6096 | return DeclPtrTy(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6097 | } |
| 6098 | } |
| 6099 | |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 6100 | EnumConstantDecl *New = CheckEnumConstant(TheEnumDecl, LastEnumConst, |
| 6101 | IdLoc, Id, Owned(Val)); |
Chris Lattner | 421a23d | 2007-08-27 21:16:18 +0000 | [diff] [blame] | 6102 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6103 | // Register this decl in the current scope stack. |
John McCall | 92f8831 | 2010-01-23 00:46:32 +0000 | [diff] [blame] | 6104 | if (New) { |
| 6105 | New->setAccess(TheEnumDecl->getAccess()); |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 6106 | PushOnScopeChains(New, S); |
John McCall | 92f8831 | 2010-01-23 00:46:32 +0000 | [diff] [blame] | 6107 | } |
Douglas Gregor | 45579f5 | 2008-12-17 02:04:30 +0000 | [diff] [blame] | 6108 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 6109 | return DeclPtrTy::make(New); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6110 | } |
| 6111 | |
Mike Stump | c6e35aa | 2009-05-16 07:06:02 +0000 | [diff] [blame] | 6112 | void Sema::ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, |
| 6113 | SourceLocation RBraceLoc, DeclPtrTy EnumDeclX, |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 6114 | DeclPtrTy *Elements, unsigned NumElements, |
| 6115 | Scope *S, AttributeList *Attr) { |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 6116 | EnumDecl *Enum = cast<EnumDecl>(EnumDeclX.getAs<Decl>()); |
Douglas Gregor | 074149e | 2009-01-05 19:45:36 +0000 | [diff] [blame] | 6117 | QualType EnumType = Context.getTypeDeclType(Enum); |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 6118 | |
| 6119 | if (Attr) |
| 6120 | ProcessDeclAttributeList(S, Enum, Attr); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6121 | |
Eli Friedman | ed0716b | 2009-12-11 01:34:50 +0000 | [diff] [blame] | 6122 | if (Enum->isDependentType()) { |
| 6123 | for (unsigned i = 0; i != NumElements; ++i) { |
| 6124 | EnumConstantDecl *ECD = |
| 6125 | cast_or_null<EnumConstantDecl>(Elements[i].getAs<Decl>()); |
| 6126 | if (!ECD) continue; |
| 6127 | |
| 6128 | ECD->setType(EnumType); |
| 6129 | } |
| 6130 | |
Douglas Gregor | 838db38 | 2010-02-11 01:19:42 +0000 | [diff] [blame] | 6131 | Enum->completeDefinition(Context.DependentTy, Context.DependentTy); |
Eli Friedman | ed0716b | 2009-12-11 01:34:50 +0000 | [diff] [blame] | 6132 | return; |
| 6133 | } |
| 6134 | |
Chris Lattner | e37f0be | 2007-08-28 05:10:31 +0000 | [diff] [blame] | 6135 | // TODO: If the result value doesn't fit in an int, it must be a long or long |
| 6136 | // long value. ISO C does not support this, but GCC does as an extension, |
| 6137 | // emit a warning. |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 6138 | unsigned IntWidth = Context.Target.getIntWidth(); |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 6139 | unsigned CharWidth = Context.Target.getCharWidth(); |
| 6140 | unsigned ShortWidth = Context.Target.getShortWidth(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6141 | |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 6142 | // Verify that all the values are okay, compute the size of the values, and |
| 6143 | // reverse the list. |
| 6144 | unsigned NumNegativeBits = 0; |
| 6145 | unsigned NumPositiveBits = 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6146 | |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 6147 | // Keep track of whether all elements have type int. |
| 6148 | bool AllElementsInt = true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6149 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6150 | for (unsigned i = 0; i != NumElements; ++i) { |
| 6151 | EnumConstantDecl *ECD = |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 6152 | cast_or_null<EnumConstantDecl>(Elements[i].getAs<Decl>()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6153 | if (!ECD) continue; // Already issued a diagnostic. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6154 | |
Chris Lattner | 211a30e | 2007-08-28 05:27:00 +0000 | [diff] [blame] | 6155 | const llvm::APSInt &InitVal = ECD->getInitVal(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6156 | |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 6157 | // Keep track of the size of positive and negative values. |
Chris Lattner | a73349d | 2008-02-26 00:33:57 +0000 | [diff] [blame] | 6158 | if (InitVal.isUnsigned() || InitVal.isNonNegative()) |
Chris Lattner | 21dd821 | 2008-01-14 21:47:29 +0000 | [diff] [blame] | 6159 | NumPositiveBits = std::max(NumPositiveBits, |
| 6160 | (unsigned)InitVal.getActiveBits()); |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 6161 | else |
Chris Lattner | 21dd821 | 2008-01-14 21:47:29 +0000 | [diff] [blame] | 6162 | NumNegativeBits = std::max(NumNegativeBits, |
| 6163 | (unsigned)InitVal.getMinSignedBits()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6164 | |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 6165 | // Keep track of whether every enum element has type int (very commmon). |
| 6166 | if (AllElementsInt) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6167 | AllElementsInt = ECD->getType() == Context.IntTy; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6168 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6169 | |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 6170 | // Figure out the type that should be used for this enum. |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 6171 | // FIXME: Support -fshort-enums. |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 6172 | QualType BestType; |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 6173 | unsigned BestWidth; |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 6174 | |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 6175 | // C++0x N3000 [conv.prom]p3: |
| 6176 | // An rvalue of an unscoped enumeration type whose underlying |
| 6177 | // type is not fixed can be converted to an rvalue of the first |
| 6178 | // of the following types that can represent all the values of |
| 6179 | // the enumeration: int, unsigned int, long int, unsigned long |
| 6180 | // int, long long int, or unsigned long long int. |
| 6181 | // C99 6.4.4.3p2: |
| 6182 | // An identifier declared as an enumeration constant has type int. |
| 6183 | // The C99 rule is modified by a gcc extension |
| 6184 | QualType BestPromotionType; |
| 6185 | |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 6186 | bool Packed = Enum->getAttr<PackedAttr>() ? true : false; |
| 6187 | |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 6188 | if (NumNegativeBits) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6189 | // 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] | 6190 | // int/long/longlong) that fits. |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 6191 | // If it's packed, check also if it fits a char or a short. |
| 6192 | if (Packed && NumNegativeBits <= CharWidth && NumPositiveBits < CharWidth) { |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 6193 | BestType = Context.SignedCharTy; |
| 6194 | BestWidth = CharWidth; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6195 | } else if (Packed && NumNegativeBits <= ShortWidth && |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 6196 | NumPositiveBits < ShortWidth) { |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 6197 | BestType = Context.ShortTy; |
| 6198 | BestWidth = ShortWidth; |
| 6199 | } else if (NumNegativeBits <= IntWidth && NumPositiveBits < IntWidth) { |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 6200 | BestType = Context.IntTy; |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 6201 | BestWidth = IntWidth; |
| 6202 | } else { |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 6203 | BestWidth = Context.Target.getLongWidth(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6204 | |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 6205 | if (NumNegativeBits <= BestWidth && NumPositiveBits < BestWidth) { |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 6206 | BestType = Context.LongTy; |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 6207 | } else { |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 6208 | BestWidth = Context.Target.getLongLongWidth(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6209 | |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 6210 | if (NumNegativeBits > BestWidth || NumPositiveBits >= BestWidth) |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 6211 | Diag(Enum->getLocation(), diag::warn_enum_too_large); |
| 6212 | BestType = Context.LongLongTy; |
| 6213 | } |
| 6214 | } |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 6215 | BestPromotionType = (BestWidth <= IntWidth ? Context.IntTy : BestType); |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 6216 | } else { |
Douglas Gregor | aa74a1e | 2010-02-02 20:10:50 +0000 | [diff] [blame] | 6217 | // If there is no negative value, figure out the smallest type that fits |
| 6218 | // all of the enumerator values. |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 6219 | // If it's packed, check also if it fits a char or a short. |
| 6220 | if (Packed && NumPositiveBits <= CharWidth) { |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 6221 | BestType = Context.UnsignedCharTy; |
| 6222 | BestPromotionType = Context.IntTy; |
| 6223 | BestWidth = CharWidth; |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 6224 | } else if (Packed && NumPositiveBits <= ShortWidth) { |
John McCall | 842aef8 | 2009-12-09 09:09:27 +0000 | [diff] [blame] | 6225 | BestType = Context.UnsignedShortTy; |
| 6226 | BestPromotionType = Context.IntTy; |
| 6227 | BestWidth = ShortWidth; |
| 6228 | } else if (NumPositiveBits <= IntWidth) { |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 6229 | BestType = Context.UnsignedIntTy; |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 6230 | BestWidth = IntWidth; |
Douglas Gregor | aa74a1e | 2010-02-02 20:10:50 +0000 | [diff] [blame] | 6231 | BestPromotionType |
| 6232 | = (NumPositiveBits == BestWidth || !getLangOptions().CPlusPlus) |
| 6233 | ? Context.UnsignedIntTy : Context.IntTy; |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 6234 | } else if (NumPositiveBits <= |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 6235 | (BestWidth = Context.Target.getLongWidth())) { |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 6236 | BestType = Context.UnsignedLongTy; |
Douglas Gregor | aa74a1e | 2010-02-02 20:10:50 +0000 | [diff] [blame] | 6237 | BestPromotionType |
| 6238 | = (NumPositiveBits == BestWidth || !getLangOptions().CPlusPlus) |
| 6239 | ? Context.UnsignedLongTy : Context.LongTy; |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 6240 | } else { |
| 6241 | BestWidth = Context.Target.getLongLongWidth(); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 6242 | assert(NumPositiveBits <= BestWidth && |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 6243 | "How could an initializer get larger than ULL?"); |
| 6244 | BestType = Context.UnsignedLongLongTy; |
Douglas Gregor | aa74a1e | 2010-02-02 20:10:50 +0000 | [diff] [blame] | 6245 | BestPromotionType |
| 6246 | = (NumPositiveBits == BestWidth || !getLangOptions().CPlusPlus) |
| 6247 | ? Context.UnsignedLongLongTy : Context.LongLongTy; |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 6248 | } |
| 6249 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6250 | |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 6251 | // Loop over all of the enumerator constants, changing their types to match |
| 6252 | // the type of the enum if needed. |
| 6253 | for (unsigned i = 0; i != NumElements; ++i) { |
| 6254 | EnumConstantDecl *ECD = |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 6255 | cast_or_null<EnumConstantDecl>(Elements[i].getAs<Decl>()); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 6256 | if (!ECD) continue; // Already issued a diagnostic. |
| 6257 | |
| 6258 | // Standard C says the enumerators have int type, but we allow, as an |
| 6259 | // extension, the enumerators to be larger than int size. If each |
| 6260 | // enumerator value fits in an int, type it as an int, otherwise type it the |
| 6261 | // same as the enumerator decl itself. This means that in "enum { X = 1U }" |
| 6262 | // that X has type 'int', not 'unsigned'. |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 6263 | |
| 6264 | // Determine whether the value fits into an int. |
| 6265 | llvm::APSInt InitVal = ECD->getInitVal(); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 6266 | |
| 6267 | // If it fits into an integer type, force it. Otherwise force it to match |
| 6268 | // the enum decl type. |
| 6269 | QualType NewTy; |
| 6270 | unsigned NewWidth; |
| 6271 | bool NewSign; |
Douglas Gregor | 677e4fe | 2010-02-01 23:36:03 +0000 | [diff] [blame] | 6272 | if (!getLangOptions().CPlusPlus && |
| 6273 | isRepresentableIntegerValue(Context, InitVal, Context.IntTy)) { |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 6274 | NewTy = Context.IntTy; |
| 6275 | NewWidth = IntWidth; |
| 6276 | NewSign = true; |
| 6277 | } else if (ECD->getType() == BestType) { |
| 6278 | // Already the right type! |
Douglas Gregor | c9467cf | 2008-12-12 02:00:36 +0000 | [diff] [blame] | 6279 | if (getLangOptions().CPlusPlus) |
| 6280 | // C++ [dcl.enum]p4: Following the closing brace of an |
| 6281 | // enum-specifier, each enumerator has the type of its |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6282 | // enumeration. |
Douglas Gregor | c9467cf | 2008-12-12 02:00:36 +0000 | [diff] [blame] | 6283 | ECD->setType(EnumType); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 6284 | continue; |
| 6285 | } else { |
| 6286 | NewTy = BestType; |
| 6287 | NewWidth = BestWidth; |
| 6288 | NewSign = BestType->isSignedIntegerType(); |
| 6289 | } |
| 6290 | |
| 6291 | // Adjust the APSInt value. |
| 6292 | InitVal.extOrTrunc(NewWidth); |
| 6293 | InitVal.setIsSigned(NewSign); |
| 6294 | ECD->setInitVal(InitVal); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6295 | |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 6296 | // Adjust the Expr initializer and type. |
Chris Lattner | 13fd416 | 2009-01-15 19:19:42 +0000 | [diff] [blame] | 6297 | if (ECD->getInitExpr()) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6298 | ECD->setInitExpr(new (Context) ImplicitCastExpr(NewTy, |
Eli Friedman | 73c39ab | 2009-10-20 08:27:19 +0000 | [diff] [blame] | 6299 | CastExpr::CK_IntegralCast, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6300 | ECD->getInitExpr(), |
Ted Kremenek | 8189cde | 2009-02-07 01:47:29 +0000 | [diff] [blame] | 6301 | /*isLvalue=*/false)); |
Douglas Gregor | c9467cf | 2008-12-12 02:00:36 +0000 | [diff] [blame] | 6302 | if (getLangOptions().CPlusPlus) |
| 6303 | // C++ [dcl.enum]p4: Following the closing brace of an |
| 6304 | // enum-specifier, each enumerator has the type of its |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6305 | // enumeration. |
Douglas Gregor | c9467cf | 2008-12-12 02:00:36 +0000 | [diff] [blame] | 6306 | ECD->setType(EnumType); |
| 6307 | else |
| 6308 | ECD->setType(NewTy); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 6309 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 6310 | |
Douglas Gregor | 838db38 | 2010-02-11 01:19:42 +0000 | [diff] [blame] | 6311 | Enum->completeDefinition(BestType, BestPromotionType); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 6312 | } |
| 6313 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 6314 | Sema::DeclPtrTy Sema::ActOnFileScopeAsmDecl(SourceLocation Loc, |
| 6315 | ExprArg expr) { |
Anders Carlsson | f1b1d59 | 2009-05-01 19:30:39 +0000 | [diff] [blame] | 6316 | StringLiteral *AsmString = cast<StringLiteral>(expr.takeAs<Expr>()); |
Sebastian Redl | 798d119 | 2008-12-13 16:23:55 +0000 | [diff] [blame] | 6317 | |
Douglas Gregor | 4fe0c8e | 2009-05-30 00:08:05 +0000 | [diff] [blame] | 6318 | FileScopeAsmDecl *New = FileScopeAsmDecl::Create(Context, CurContext, |
| 6319 | Loc, AsmString); |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 6320 | CurContext->addDecl(New); |
Douglas Gregor | 4fe0c8e | 2009-05-30 00:08:05 +0000 | [diff] [blame] | 6321 | return DeclPtrTy::make(New); |
Anders Carlsson | dfab6cb | 2008-02-08 00:33:21 +0000 | [diff] [blame] | 6322 | } |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 6323 | |
| 6324 | void Sema::ActOnPragmaWeakID(IdentifierInfo* Name, |
| 6325 | SourceLocation PragmaLoc, |
| 6326 | SourceLocation NameLoc) { |
John McCall | f36e02d | 2009-10-09 21:13:30 +0000 | [diff] [blame] | 6327 | Decl *PrevDecl = LookupSingleName(TUScope, Name, LookupOrdinaryName); |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 6328 | |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 6329 | if (PrevDecl) { |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 6330 | PrevDecl->addAttr(::new (Context) WeakAttr()); |
Ryan Flynn | e25ff83 | 2009-07-30 03:15:39 +0000 | [diff] [blame] | 6331 | } else { |
| 6332 | (void)WeakUndeclaredIdentifiers.insert( |
| 6333 | std::pair<IdentifierInfo*,WeakInfo> |
| 6334 | (Name, WeakInfo((IdentifierInfo*)0, NameLoc))); |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 6335 | } |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 6336 | } |
| 6337 | |
| 6338 | void Sema::ActOnPragmaWeakAlias(IdentifierInfo* Name, |
| 6339 | IdentifierInfo* AliasName, |
| 6340 | SourceLocation PragmaLoc, |
| 6341 | SourceLocation NameLoc, |
| 6342 | SourceLocation AliasNameLoc) { |
John McCall | f36e02d | 2009-10-09 21:13:30 +0000 | [diff] [blame] | 6343 | Decl *PrevDecl = LookupSingleName(TUScope, AliasName, LookupOrdinaryName); |
Ryan Flynn | e25ff83 | 2009-07-30 03:15:39 +0000 | [diff] [blame] | 6344 | WeakInfo W = WeakInfo(Name, NameLoc); |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 6345 | |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 6346 | if (PrevDecl) { |
Ryan Flynn | e25ff83 | 2009-07-30 03:15:39 +0000 | [diff] [blame] | 6347 | if (!PrevDecl->hasAttr<AliasAttr>()) |
| 6348 | if (NamedDecl *ND = dyn_cast<NamedDecl>(PrevDecl)) |
Ryan Flynn | 7b1fdbd | 2009-07-31 02:52:19 +0000 | [diff] [blame] | 6349 | DeclApplyPragmaWeak(TUScope, ND, W); |
Ryan Flynn | e25ff83 | 2009-07-30 03:15:39 +0000 | [diff] [blame] | 6350 | } else { |
| 6351 | (void)WeakUndeclaredIdentifiers.insert( |
| 6352 | std::pair<IdentifierInfo*,WeakInfo>(AliasName, W)); |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 6353 | } |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 6354 | } |