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" |
Anders Carlsson | d7ba27d | 2009-05-14 01:09:04 +0000 | [diff] [blame] | 15 | #include "SemaInherit.h" |
Anders Carlsson | c44eec6 | 2008-07-03 04:20:39 +0000 | [diff] [blame] | 16 | #include "clang/AST/APValue.h" |
Chris Lattner | e1e7985 | 2008-02-06 00:51:33 +0000 | [diff] [blame] | 17 | #include "clang/AST/ASTConsumer.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 18 | #include "clang/AST/ASTContext.h" |
Mike Stump | b1682c5 | 2009-07-22 23:56:57 +0000 | [diff] [blame] | 19 | #include "clang/Analysis/CFG.h" |
Daniel Dunbar | c4a1dea | 2008-08-11 05:35:13 +0000 | [diff] [blame] | 20 | #include "clang/AST/DeclObjC.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" |
Mike Stump | 10e975c | 2009-07-23 00:20:25 +0000 | [diff] [blame] | 24 | #include "clang/AST/StmtObjC.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 25 | #include "clang/Parse/DeclSpec.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 26 | #include "clang/Basic/TargetInfo.h" |
Steve Naroff | 4c49a6c | 2008-01-30 23:46:05 +0000 | [diff] [blame] | 27 | #include "clang/Basic/SourceManager.h" |
| 28 | // FIXME: layering (ideally, Sema shouldn't be dependent on Lex API's) |
Chris Lattner | e1e7985 | 2008-02-06 00:51:33 +0000 | [diff] [blame] | 29 | #include "clang/Lex/Preprocessor.h" |
Steve Naroff | 4c49a6c | 2008-01-30 23:46:05 +0000 | [diff] [blame] | 30 | #include "clang/Lex/HeaderSearch.h" |
Daniel Dunbar | 1f15e76 | 2009-07-23 05:01:54 +0000 | [diff] [blame] | 31 | #include "llvm/ADT/BitVector.h" |
Douglas Gregor | e267ff3 | 2008-12-11 20:41:00 +0000 | [diff] [blame] | 32 | #include "llvm/ADT/STLExtras.h" |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 33 | #include <algorithm> |
| 34 | #include <functional> |
Mike Stump | b1682c5 | 2009-07-22 23:56:57 +0000 | [diff] [blame] | 35 | #include <queue> |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 36 | using namespace clang; |
| 37 | |
Chris Lattner | 21ff9c9 | 2009-03-05 01:25:28 +0000 | [diff] [blame] | 38 | /// getDeclName - Return a pretty name for the specified decl if possible, or |
| 39 | /// an empty string if not. This is used for pretty crash reporting. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 40 | std::string Sema::getDeclName(DeclPtrTy d) { |
| 41 | Decl *D = d.getAs<Decl>(); |
Chris Lattner | 21ff9c9 | 2009-03-05 01:25:28 +0000 | [diff] [blame] | 42 | if (NamedDecl *DN = dyn_cast_or_null<NamedDecl>(D)) |
| 43 | return DN->getQualifiedNameAsString(); |
| 44 | return ""; |
| 45 | } |
| 46 | |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 47 | Sema::DeclGroupPtrTy Sema::ConvertDeclToDeclGroup(DeclPtrTy Ptr) { |
| 48 | return DeclGroupPtrTy::make(DeclGroupRef(Ptr.getAs<Decl>())); |
| 49 | } |
| 50 | |
Douglas Gregor | d6efafa | 2009-02-04 19:16:12 +0000 | [diff] [blame] | 51 | /// \brief If the identifier refers to a type name within this scope, |
| 52 | /// return the declaration of that type. |
| 53 | /// |
| 54 | /// This routine performs ordinary name lookup of the identifier II |
| 55 | /// within the given scope, with optional C++ scope specifier SS, to |
Douglas Gregor | 1a51b4a | 2009-02-09 15:09:02 +0000 | [diff] [blame] | 56 | /// determine whether the name refers to a type. If so, returns an |
| 57 | /// opaque pointer (actually a QualType) corresponding to that |
| 58 | /// type. Otherwise, returns NULL. |
Douglas Gregor | d6efafa | 2009-02-04 19:16:12 +0000 | [diff] [blame] | 59 | /// |
| 60 | /// If name lookup results in an ambiguity, this routine will complain |
| 61 | /// and then return NULL. |
Douglas Gregor | 1a51b4a | 2009-02-09 15:09:02 +0000 | [diff] [blame] | 62 | Sema::TypeTy *Sema::getTypeName(IdentifierInfo &II, SourceLocation NameLoc, |
Douglas Gregor | b696ea3 | 2009-02-04 17:00:24 +0000 | [diff] [blame] | 63 | Scope *S, const CXXScopeSpec *SS) { |
Douglas Gregor | 5953d8b | 2009-03-19 17:26:29 +0000 | [diff] [blame] | 64 | // C++ [temp.res]p3: |
| 65 | // A qualified-id that refers to a type and in which the |
| 66 | // nested-name-specifier depends on a template-parameter (14.6.2) |
| 67 | // shall be prefixed by the keyword typename to indicate that the |
| 68 | // qualified-id denotes a type, forming an |
| 69 | // elaborated-type-specifier (7.1.5.3). |
| 70 | // |
Douglas Gregor | 42af25f | 2009-05-11 19:58:34 +0000 | [diff] [blame] | 71 | // We therefore do not perform any name lookup if the result would |
| 72 | // refer to a member of an unknown specialization. |
| 73 | if (SS && isUnknownSpecialization(*SS)) |
Douglas Gregor | 5953d8b | 2009-03-19 17:26:29 +0000 | [diff] [blame] | 74 | return 0; |
| 75 | |
Douglas Gregor | 42af25f | 2009-05-11 19:58:34 +0000 | [diff] [blame] | 76 | LookupResult Result |
| 77 | = LookupParsedName(S, SS, &II, LookupOrdinaryName, false, false); |
| 78 | |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 79 | NamedDecl *IIDecl = 0; |
Douglas Gregor | 7176fff | 2009-01-15 00:26:24 +0000 | [diff] [blame] | 80 | switch (Result.getKind()) { |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 81 | case LookupResult::NotFound: |
| 82 | case LookupResult::FoundOverloaded: |
| 83 | return 0; |
Douglas Gregor | b696ea3 | 2009-02-04 17:00:24 +0000 | [diff] [blame] | 84 | |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 85 | case LookupResult::AmbiguousBaseSubobjectTypes: |
| 86 | case LookupResult::AmbiguousBaseSubobjects: |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 87 | case LookupResult::AmbiguousReference: { |
| 88 | // Look to see if we have a type anywhere in the list of results. |
| 89 | for (LookupResult::iterator Res = Result.begin(), ResEnd = Result.end(); |
| 90 | Res != ResEnd; ++Res) { |
| 91 | if (isa<TypeDecl>(*Res) || isa<ObjCInterfaceDecl>(*Res)) { |
Douglas Gregor | 841b53c | 2009-04-13 15:14:38 +0000 | [diff] [blame] | 92 | if (!IIDecl || |
| 93 | (*Res)->getLocation().getRawEncoding() < |
| 94 | IIDecl->getLocation().getRawEncoding()) |
| 95 | IIDecl = *Res; |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 96 | } |
| 97 | } |
| 98 | |
| 99 | if (!IIDecl) { |
| 100 | // None of the entities we found is a type, so there is no way |
| 101 | // to even assume that the result is a type. In this case, don't |
| 102 | // complain about the ambiguity. The parser will either try to |
| 103 | // perform this lookup again (e.g., as an object name), which |
| 104 | // will produce the ambiguity, or will complain that it expected |
| 105 | // a type name. |
| 106 | Result.Destroy(); |
| 107 | return 0; |
| 108 | } |
| 109 | |
| 110 | // We found a type within the ambiguous lookup; diagnose the |
| 111 | // ambiguity and then return that type. This might be the right |
| 112 | // answer, or it might not be, but it suppresses any attempt to |
| 113 | // perform the name lookup again. |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 114 | DiagnoseAmbiguousLookup(Result, DeclarationName(&II), NameLoc); |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 115 | break; |
| 116 | } |
Douglas Gregor | b696ea3 | 2009-02-04 17:00:24 +0000 | [diff] [blame] | 117 | |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 118 | case LookupResult::Found: |
| 119 | IIDecl = Result.getAsDecl(); |
| 120 | break; |
Douglas Gregor | 7176fff | 2009-01-15 00:26:24 +0000 | [diff] [blame] | 121 | } |
| 122 | |
Steve Naroff | a518903 | 2009-01-29 18:09:31 +0000 | [diff] [blame] | 123 | if (IIDecl) { |
Douglas Gregor | e4e5b05 | 2009-03-19 00:18:19 +0000 | [diff] [blame] | 124 | QualType T; |
| 125 | |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 126 | if (TypeDecl *TD = dyn_cast<TypeDecl>(IIDecl)) { |
Douglas Gregor | 48f3bb9 | 2009-02-18 21:56:37 +0000 | [diff] [blame] | 127 | // Check whether we can use this type |
| 128 | (void)DiagnoseUseOfDecl(IIDecl, NameLoc); |
Douglas Gregor | 7da97d0 | 2009-05-10 22:57:19 +0000 | [diff] [blame] | 129 | |
| 130 | if (getLangOptions().CPlusPlus) { |
| 131 | // C++ [temp.local]p2: |
| 132 | // Within the scope of a class template specialization or |
| 133 | // partial specialization, when the injected-class-name is |
| 134 | // not followed by a <, it is equivalent to the |
| 135 | // injected-class-name followed by the template-argument s |
| 136 | // of the class template specialization or partial |
| 137 | // specialization enclosed in <>. |
| 138 | if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(TD)) |
| 139 | if (RD->isInjectedClassName()) |
| 140 | if (ClassTemplateDecl *Template = RD->getDescribedClassTemplate()) |
| 141 | T = Template->getInjectedClassNameType(Context); |
| 142 | } |
| 143 | |
| 144 | if (T.isNull()) |
| 145 | T = Context.getTypeDeclType(TD); |
Douglas Gregor | e4e5b05 | 2009-03-19 00:18:19 +0000 | [diff] [blame] | 146 | } else if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(IIDecl)) { |
Douglas Gregor | 48f3bb9 | 2009-02-18 21:56:37 +0000 | [diff] [blame] | 147 | // Check whether we can use this interface. |
| 148 | (void)DiagnoseUseOfDecl(IIDecl, NameLoc); |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 149 | |
Douglas Gregor | e4e5b05 | 2009-03-19 00:18:19 +0000 | [diff] [blame] | 150 | T = Context.getObjCInterfaceType(IDecl); |
| 151 | } else |
| 152 | return 0; |
| 153 | |
Douglas Gregor | e625893 | 2009-03-19 00:39:20 +0000 | [diff] [blame] | 154 | if (SS) |
| 155 | T = getQualifiedNameType(*SS, T); |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 156 | |
Douglas Gregor | e4e5b05 | 2009-03-19 00:18:19 +0000 | [diff] [blame] | 157 | return T.getAsOpaquePtr(); |
Steve Naroff | a518903 | 2009-01-29 18:09:31 +0000 | [diff] [blame] | 158 | } |
Douglas Gregor | e4e5b05 | 2009-03-19 00:18:19 +0000 | [diff] [blame] | 159 | |
Steve Naroff | 3536b44 | 2007-09-06 21:24:23 +0000 | [diff] [blame] | 160 | return 0; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 161 | } |
| 162 | |
Chris Lattner | 4c97d76 | 2009-04-12 21:49:30 +0000 | [diff] [blame] | 163 | /// isTagName() - This method is called *for error recovery purposes only* |
| 164 | /// to determine if the specified name is a valid tag name ("struct foo"). If |
| 165 | /// so, this returns the TST for the tag corresponding to it (TST_enum, |
| 166 | /// TST_union, TST_struct, TST_class). This is used to diagnose cases in C |
| 167 | /// where the user forgot to specify the tag. |
| 168 | DeclSpec::TST Sema::isTagName(IdentifierInfo &II, Scope *S) { |
| 169 | // Do a tag name lookup in this scope. |
| 170 | LookupResult R = LookupName(S, &II, LookupTagName, false, false); |
| 171 | if (R.getKind() == LookupResult::Found) |
| 172 | if (const TagDecl *TD = dyn_cast<TagDecl>(R.getAsDecl())) { |
| 173 | switch (TD->getTagKind()) { |
| 174 | case TagDecl::TK_struct: return DeclSpec::TST_struct; |
| 175 | case TagDecl::TK_union: return DeclSpec::TST_union; |
| 176 | case TagDecl::TK_class: return DeclSpec::TST_class; |
| 177 | case TagDecl::TK_enum: return DeclSpec::TST_enum; |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | return DeclSpec::TST_unspecified; |
| 182 | } |
| 183 | |
| 184 | |
| 185 | |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 186 | DeclContext *Sema::getContainingDC(DeclContext *DC) { |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 187 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(DC)) { |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 188 | // A C++ out-of-line method will return to the file declaration context. |
Argyrios Kyrtzidis | f5cecfb | 2009-06-17 22:49:50 +0000 | [diff] [blame] | 189 | if (MD->isOutOfLine()) |
Argyrios Kyrtzidis | 5239304 | 2008-11-09 23:41:00 +0000 | [diff] [blame] | 190 | return MD->getLexicalDeclContext(); |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 191 | |
Chris Lattner | 76a642f | 2009-02-15 22:43:40 +0000 | [diff] [blame] | 192 | // A C++ inline method is parsed *after* the topmost class it was declared |
| 193 | // in is fully parsed (it's "complete"). |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 194 | // The parsing of a C++ inline method happens at the declaration context of |
Argyrios Kyrtzidis | 77407b8 | 2008-11-19 18:01:13 +0000 | [diff] [blame] | 195 | // the topmost (non-nested) class it is lexically declared in. |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 196 | assert(isa<CXXRecordDecl>(MD->getParent()) && "C++ method not in Record."); |
| 197 | DC = MD->getParent(); |
Argyrios Kyrtzidis | 77407b8 | 2008-11-19 18:01:13 +0000 | [diff] [blame] | 198 | while (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(DC->getLexicalParent())) |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 199 | DC = RD; |
| 200 | |
| 201 | // Return the declaration context of the topmost class the inline method is |
| 202 | // declared in. |
| 203 | return DC; |
| 204 | } |
| 205 | |
Argyrios Kyrtzidis | 5239304 | 2008-11-09 23:41:00 +0000 | [diff] [blame] | 206 | if (isa<ObjCMethodDecl>(DC)) |
| 207 | return Context.getTranslationUnitDecl(); |
| 208 | |
Argyrios Kyrtzidis | 77407b8 | 2008-11-19 18:01:13 +0000 | [diff] [blame] | 209 | return DC->getLexicalParent(); |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 210 | } |
| 211 | |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 212 | void Sema::PushDeclContext(Scope *S, DeclContext *DC) { |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 213 | assert(getContainingDC(DC) == CurContext && |
Zhongxing Xu | e50897a | 2008-12-08 07:14:51 +0000 | [diff] [blame] | 214 | "The next DeclContext should be lexically contained in the current one."); |
Chris Lattner | 9fdf9c6 | 2008-04-22 18:39:57 +0000 | [diff] [blame] | 215 | CurContext = DC; |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 216 | S->setEntity(DC); |
Chris Lattner | 0ed844b | 2008-04-04 06:12:32 +0000 | [diff] [blame] | 217 | } |
| 218 | |
Chris Lattner | b048c98 | 2008-04-06 04:47:34 +0000 | [diff] [blame] | 219 | void Sema::PopDeclContext() { |
| 220 | assert(CurContext && "DeclContext imbalance!"); |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 221 | |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 222 | CurContext = getContainingDC(CurContext); |
Chris Lattner | 0ed844b | 2008-04-04 06:12:32 +0000 | [diff] [blame] | 223 | } |
| 224 | |
Argyrios Kyrtzidis | 179fe1a | 2009-06-17 23:19:02 +0000 | [diff] [blame] | 225 | /// EnterDeclaratorContext - Used when we must lookup names in the context |
| 226 | /// of a declarator's nested name specifier. |
Argyrios Kyrtzidis | 1d17553 | 2009-06-17 23:15:40 +0000 | [diff] [blame] | 227 | void Sema::EnterDeclaratorContext(Scope *S, DeclContext *DC) { |
| 228 | assert(PreDeclaratorDC == 0 && "Previous declarator context not popped?"); |
| 229 | PreDeclaratorDC = static_cast<DeclContext*>(S->getEntity()); |
| 230 | CurContext = DC; |
| 231 | assert(CurContext && "No context?"); |
| 232 | S->setEntity(CurContext); |
| 233 | } |
| 234 | |
Argyrios Kyrtzidis | 1d17553 | 2009-06-17 23:15:40 +0000 | [diff] [blame] | 235 | void Sema::ExitDeclaratorContext(Scope *S) { |
| 236 | S->setEntity(PreDeclaratorDC); |
| 237 | PreDeclaratorDC = 0; |
| 238 | |
| 239 | // Reset CurContext to the nearest enclosing context. |
| 240 | while (!S->getEntity() && S->getParent()) |
| 241 | S = S->getParent(); |
| 242 | CurContext = static_cast<DeclContext*>(S->getEntity()); |
| 243 | assert(CurContext && "No context?"); |
| 244 | } |
| 245 | |
Douglas Gregor | f9201e0 | 2009-02-11 23:02:49 +0000 | [diff] [blame] | 246 | /// \brief Determine whether we allow overloading of the function |
| 247 | /// PrevDecl with another declaration. |
| 248 | /// |
| 249 | /// This routine determines whether overloading is possible, not |
| 250 | /// whether some new function is actually an overload. It will return |
| 251 | /// true in C++ (where we can always provide overloads) or, as an |
| 252 | /// extension, in C when the previous function is already an |
| 253 | /// overloaded function declaration or has the "overloadable" |
| 254 | /// attribute. |
| 255 | static bool AllowOverloadingOfFunction(Decl *PrevDecl, ASTContext &Context) { |
| 256 | if (Context.getLangOptions().CPlusPlus) |
| 257 | return true; |
| 258 | |
| 259 | if (isa<OverloadedFunctionDecl>(PrevDecl)) |
| 260 | return true; |
| 261 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 262 | return PrevDecl->getAttr<OverloadableAttr>() != 0; |
Douglas Gregor | f9201e0 | 2009-02-11 23:02:49 +0000 | [diff] [blame] | 263 | } |
| 264 | |
Argyrios Kyrtzidis | 87f3ff0 | 2008-04-12 00:47:19 +0000 | [diff] [blame] | 265 | /// Add this decl to the scope shadowed decl chains. |
| 266 | void Sema::PushOnScopeChains(NamedDecl *D, Scope *S) { |
Douglas Gregor | 074149e | 2009-01-05 19:45:36 +0000 | [diff] [blame] | 267 | // Move up the scope chain until we find the nearest enclosing |
| 268 | // non-transparent context. The declaration will be introduced into this |
| 269 | // scope. |
| 270 | while (S->getEntity() && |
| 271 | ((DeclContext *)S->getEntity())->isTransparentContext()) |
| 272 | S = S->getParent(); |
| 273 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 274 | S->AddDecl(DeclPtrTy::make(D)); |
Argyrios Kyrtzidis | 00bc645 | 2008-05-09 23:39:43 +0000 | [diff] [blame] | 275 | |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 276 | // Add scoped declarations into their context, so that they can be |
| 277 | // found later. Declarations without a context won't be inserted |
| 278 | // into any context. |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 279 | CurContext->addDecl(D); |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 280 | |
Argyrios Kyrtzidis | 00bc645 | 2008-05-09 23:39:43 +0000 | [diff] [blame] | 281 | // C++ [basic.scope]p4: |
| 282 | // -- exactly one declaration shall declare a class name or |
| 283 | // enumeration name that is not a typedef name and the other |
| 284 | // declarations shall all refer to the same object or |
| 285 | // enumerator, or all refer to functions and function templates; |
| 286 | // in this case the class name or enumeration name is hidden. |
| 287 | if (TagDecl *TD = dyn_cast<TagDecl>(D)) { |
| 288 | // We are pushing the name of a tag (enum or class). |
Douglas Gregor | e21b994 | 2009-01-07 16:34:42 +0000 | [diff] [blame] | 289 | if (CurContext->getLookupContext() |
| 290 | == TD->getDeclContext()->getLookupContext()) { |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 291 | // We're pushing the tag into the current context, which might |
| 292 | // require some reshuffling in the identifier resolver. |
| 293 | IdentifierResolver::iterator |
Douglas Gregor | 4c921ae | 2009-01-30 01:04:22 +0000 | [diff] [blame] | 294 | I = IdResolver.begin(TD->getDeclName()), |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 295 | IEnd = IdResolver.end(); |
| 296 | if (I != IEnd && isDeclInScope(*I, CurContext, S)) { |
| 297 | NamedDecl *PrevDecl = *I; |
| 298 | for (; I != IEnd && isDeclInScope(*I, CurContext, S); |
| 299 | PrevDecl = *I, ++I) { |
| 300 | if (TD->declarationReplaces(*I)) { |
| 301 | // This is a redeclaration. Remove it from the chain and |
| 302 | // break out, so that we'll add in the shadowed |
| 303 | // declaration. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 304 | S->RemoveDecl(DeclPtrTy::make(*I)); |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 305 | if (PrevDecl == *I) { |
| 306 | IdResolver.RemoveDecl(*I); |
| 307 | IdResolver.AddDecl(TD); |
| 308 | return; |
| 309 | } else { |
| 310 | IdResolver.RemoveDecl(*I); |
| 311 | break; |
| 312 | } |
| 313 | } |
| 314 | } |
Argyrios Kyrtzidis | 00bc645 | 2008-05-09 23:39:43 +0000 | [diff] [blame] | 315 | |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 316 | // There is already a declaration with the same name in the same |
| 317 | // scope, which is not a tag declaration. It must be found |
| 318 | // before we find the new declaration, so insert the new |
| 319 | // declaration at the end of the chain. |
| 320 | IdResolver.AddShadowedDecl(TD, PrevDecl); |
| 321 | |
| 322 | return; |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 323 | } |
Argyrios Kyrtzidis | 00bc645 | 2008-05-09 23:39:43 +0000 | [diff] [blame] | 324 | } |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 325 | } else if ((isa<FunctionDecl>(D) && |
| 326 | AllowOverloadingOfFunction(D, Context)) || |
| 327 | isa<FunctionTemplateDecl>(D)) { |
| 328 | // We are pushing the name of a function or function template, |
| 329 | // which might be an overloaded name. |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 330 | IdentifierResolver::iterator Redecl |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 331 | = std::find_if(IdResolver.begin(D->getDeclName()), |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 332 | IdResolver.end(), |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 333 | std::bind1st(std::mem_fun(&NamedDecl::declarationReplaces), |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 334 | D)); |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 335 | if (Redecl != IdResolver.end() && |
| 336 | S->isDeclScope(DeclPtrTy::make(*Redecl))) { |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 337 | // There is already a declaration of a function on our |
| 338 | // IdResolver chain. Replace it with this declaration. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 339 | S->RemoveDecl(DeclPtrTy::make(*Redecl)); |
Douglas Gregor | 6ed40e3 | 2008-12-23 21:05:05 +0000 | [diff] [blame] | 340 | IdResolver.RemoveDecl(*Redecl); |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 341 | } |
Douglas Gregor | 516ff43 | 2009-04-24 02:57:34 +0000 | [diff] [blame] | 342 | } else if (isa<ObjCInterfaceDecl>(D)) { |
| 343 | // We're pushing an Objective-C interface into the current |
| 344 | // context. If there is already an alias declaration, remove it first. |
| 345 | for (IdentifierResolver::iterator |
| 346 | I = IdResolver.begin(D->getDeclName()), IEnd = IdResolver.end(); |
| 347 | I != IEnd; ++I) { |
| 348 | if (isa<ObjCCompatibleAliasDecl>(*I)) { |
| 349 | S->RemoveDecl(DeclPtrTy::make(*I)); |
| 350 | IdResolver.RemoveDecl(*I); |
| 351 | break; |
| 352 | } |
| 353 | } |
Argyrios Kyrtzidis | 00bc645 | 2008-05-09 23:39:43 +0000 | [diff] [blame] | 354 | } |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 355 | |
Argyrios Kyrtzidis | 00bc645 | 2008-05-09 23:39:43 +0000 | [diff] [blame] | 356 | IdResolver.AddDecl(D); |
Argyrios Kyrtzidis | 87f3ff0 | 2008-04-12 00:47:19 +0000 | [diff] [blame] | 357 | } |
| 358 | |
Steve Naroff | b216c88 | 2007-10-09 22:01:59 +0000 | [diff] [blame] | 359 | void Sema::ActOnPopScope(SourceLocation Loc, Scope *S) { |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 360 | if (S->decl_empty()) return; |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 361 | assert((S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope)) && |
| 362 | "Scope shouldn't contain decls!"); |
Argyrios Kyrtzidis | 00bc645 | 2008-05-09 23:39:43 +0000 | [diff] [blame] | 363 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 364 | for (Scope::decl_iterator I = S->decl_begin(), E = S->decl_end(); |
| 365 | I != E; ++I) { |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 366 | Decl *TmpD = (*I).getAs<Decl>(); |
Steve Naroff | c752d04 | 2007-09-13 18:10:37 +0000 | [diff] [blame] | 367 | assert(TmpD && "This decl didn't get pushed??"); |
Argyrios Kyrtzidis | 7643536 | 2008-06-10 01:32:09 +0000 | [diff] [blame] | 368 | |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 369 | assert(isa<NamedDecl>(TmpD) && "Decl isn't NamedDecl?"); |
| 370 | NamedDecl *D = cast<NamedDecl>(TmpD); |
Argyrios Kyrtzidis | 7643536 | 2008-06-10 01:32:09 +0000 | [diff] [blame] | 371 | |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 372 | if (!D->getDeclName()) continue; |
Chris Lattner | 7f925cc | 2008-04-11 07:00:53 +0000 | [diff] [blame] | 373 | |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 374 | // Remove this name from our lexical scope. |
| 375 | IdResolver.RemoveDecl(D); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 376 | } |
| 377 | } |
| 378 | |
Steve Naroff | e8043c3 | 2008-04-01 23:04:06 +0000 | [diff] [blame] | 379 | /// getObjCInterfaceDecl - Look up a for a class declaration in the scope. |
| 380 | /// return 0 if one not found. |
Steve Naroff | e8043c3 | 2008-04-01 23:04:06 +0000 | [diff] [blame] | 381 | ObjCInterfaceDecl *Sema::getObjCInterfaceDecl(IdentifierInfo *Id) { |
Steve Naroff | 3110251 | 2008-04-02 18:30:49 +0000 | [diff] [blame] | 382 | // The third "scope" argument is 0 since we aren't enabling lazy built-in |
| 383 | // creation from this context. |
Douglas Gregor | 47b9a1c | 2009-02-04 17:27:36 +0000 | [diff] [blame] | 384 | NamedDecl *IDecl = LookupName(TUScope, Id, LookupOrdinaryName); |
Fariborz Jahanian | 4cabdfc | 2007-10-12 19:38:20 +0000 | [diff] [blame] | 385 | |
Steve Naroff | b327ce0 | 2008-04-02 14:35:35 +0000 | [diff] [blame] | 386 | return dyn_cast_or_null<ObjCInterfaceDecl>(IDecl); |
Fariborz Jahanian | 4cabdfc | 2007-10-12 19:38:20 +0000 | [diff] [blame] | 387 | } |
| 388 | |
Douglas Gregor | 1a0d31a | 2009-01-12 18:45:55 +0000 | [diff] [blame] | 389 | /// getNonFieldDeclScope - Retrieves the innermost scope, starting |
| 390 | /// from S, where a non-field would be declared. This routine copes |
| 391 | /// with the difference between C and C++ scoping rules in structs and |
| 392 | /// unions. For example, the following code is well-formed in C but |
| 393 | /// ill-formed in C++: |
| 394 | /// @code |
| 395 | /// struct S6 { |
| 396 | /// enum { BAR } e; |
| 397 | /// }; |
| 398 | /// |
| 399 | /// void test_S6() { |
| 400 | /// struct S6 a; |
| 401 | /// a.e = BAR; |
| 402 | /// } |
| 403 | /// @endcode |
| 404 | /// For the declaration of BAR, this routine will return a different |
| 405 | /// scope. The scope S will be the scope of the unnamed enumeration |
| 406 | /// within S6. In C++, this routine will return the scope associated |
| 407 | /// with S6, because the enumeration's scope is a transparent |
| 408 | /// context but structures can contain non-field names. In C, this |
| 409 | /// routine will return the translation unit scope, since the |
| 410 | /// enumeration's scope is a transparent context and structures cannot |
| 411 | /// contain non-field names. |
| 412 | Scope *Sema::getNonFieldDeclScope(Scope *S) { |
| 413 | while (((S->getFlags() & Scope::DeclScope) == 0) || |
| 414 | (S->getEntity() && |
| 415 | ((DeclContext *)S->getEntity())->isTransparentContext()) || |
| 416 | (S->isClassScope() && !getLangOptions().CPlusPlus)) |
| 417 | S = S->getParent(); |
| 418 | return S; |
| 419 | } |
| 420 | |
Chris Lattner | 95e2c71 | 2008-05-05 22:18:14 +0000 | [diff] [blame] | 421 | void Sema::InitBuiltinVaListType() { |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 422 | if (!Context.getBuiltinVaListType().isNull()) |
| 423 | return; |
| 424 | |
| 425 | IdentifierInfo *VaIdent = &Context.Idents.get("__builtin_va_list"); |
Douglas Gregor | 47b9a1c | 2009-02-04 17:27:36 +0000 | [diff] [blame] | 426 | NamedDecl *VaDecl = LookupName(TUScope, VaIdent, LookupOrdinaryName); |
Steve Naroff | 733002f | 2007-10-18 22:17:45 +0000 | [diff] [blame] | 427 | TypedefDecl *VaTypedef = cast<TypedefDecl>(VaDecl); |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 428 | Context.setBuiltinVaListType(Context.getTypedefType(VaTypedef)); |
| 429 | } |
| 430 | |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 431 | /// LazilyCreateBuiltin - The specified Builtin-ID was first used at |
| 432 | /// file scope. lazily create a decl for it. ForRedeclaration is true |
| 433 | /// if we're creating this built-in in anticipation of redeclaring the |
| 434 | /// built-in. |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 435 | NamedDecl *Sema::LazilyCreateBuiltin(IdentifierInfo *II, unsigned bid, |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 436 | Scope *S, bool ForRedeclaration, |
| 437 | SourceLocation Loc) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 438 | Builtin::ID BID = (Builtin::ID)bid; |
| 439 | |
Chris Lattner | bd7eb1c | 2008-09-28 05:54:29 +0000 | [diff] [blame] | 440 | if (Context.BuiltinInfo.hasVAListUse(BID)) |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 441 | InitBuiltinVaListType(); |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 442 | |
Chris Lattner | 86df27b | 2009-06-14 00:45:47 +0000 | [diff] [blame] | 443 | ASTContext::GetBuiltinTypeError Error; |
| 444 | QualType R = Context.GetBuiltinType(BID, Error); |
Douglas Gregor | 370ab3f | 2009-02-14 01:52:53 +0000 | [diff] [blame] | 445 | switch (Error) { |
Chris Lattner | 86df27b | 2009-06-14 00:45:47 +0000 | [diff] [blame] | 446 | case ASTContext::GE_None: |
Douglas Gregor | 370ab3f | 2009-02-14 01:52:53 +0000 | [diff] [blame] | 447 | // Okay |
| 448 | break; |
| 449 | |
Mike Stump | f711c41 | 2009-07-28 23:57:15 +0000 | [diff] [blame] | 450 | case ASTContext::GE_Missing_stdio: |
Douglas Gregor | 370ab3f | 2009-02-14 01:52:53 +0000 | [diff] [blame] | 451 | if (ForRedeclaration) |
| 452 | Diag(Loc, diag::err_implicit_decl_requires_stdio) |
| 453 | << Context.BuiltinInfo.GetName(BID); |
| 454 | return 0; |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 455 | |
Mike Stump | f711c41 | 2009-07-28 23:57:15 +0000 | [diff] [blame] | 456 | case ASTContext::GE_Missing_setjmp: |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 457 | if (ForRedeclaration) |
| 458 | Diag(Loc, diag::err_implicit_decl_requires_setjmp) |
| 459 | << Context.BuiltinInfo.GetName(BID); |
| 460 | return 0; |
Douglas Gregor | 370ab3f | 2009-02-14 01:52:53 +0000 | [diff] [blame] | 461 | } |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 462 | |
| 463 | if (!ForRedeclaration && Context.BuiltinInfo.isPredefinedLibFunction(BID)) { |
| 464 | Diag(Loc, diag::ext_implicit_lib_function_decl) |
| 465 | << Context.BuiltinInfo.GetName(BID) |
| 466 | << R; |
Douglas Gregor | b1152d8 | 2009-02-16 21:58:21 +0000 | [diff] [blame] | 467 | if (Context.BuiltinInfo.getHeaderName(BID) && |
Chris Lattner | 6a7334d | 2009-04-16 03:59:32 +0000 | [diff] [blame] | 468 | Diags.getDiagnosticLevel(diag::ext_implicit_lib_function_decl) |
| 469 | != Diagnostic::Ignored) |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 470 | Diag(Loc, diag::note_please_include_header) |
| 471 | << Context.BuiltinInfo.getHeaderName(BID) |
| 472 | << Context.BuiltinInfo.GetName(BID); |
| 473 | } |
| 474 | |
Argyrios Kyrtzidis | ff898cd | 2008-04-17 14:47:13 +0000 | [diff] [blame] | 475 | FunctionDecl *New = FunctionDecl::Create(Context, |
| 476 | Context.getTranslationUnitDecl(), |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 477 | Loc, II, R, |
Douglas Gregor | 2224f84 | 2009-02-25 16:33:18 +0000 | [diff] [blame] | 478 | FunctionDecl::Extern, false, |
| 479 | /*hasPrototype=*/true); |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 480 | New->setImplicit(); |
| 481 | |
Chris Lattner | 95e2c71 | 2008-05-05 22:18:14 +0000 | [diff] [blame] | 482 | // Create Decl objects for each parameter, adding them to the |
| 483 | // FunctionDecl. |
Douglas Gregor | 72564e7 | 2009-02-26 23:50:07 +0000 | [diff] [blame] | 484 | if (FunctionProtoType *FT = dyn_cast<FunctionProtoType>(R)) { |
Chris Lattner | 95e2c71 | 2008-05-05 22:18:14 +0000 | [diff] [blame] | 485 | llvm::SmallVector<ParmVarDecl*, 16> Params; |
| 486 | for (unsigned i = 0, e = FT->getNumArgs(); i != e; ++i) |
| 487 | Params.push_back(ParmVarDecl::Create(Context, New, SourceLocation(), 0, |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 488 | FT->getArgType(i), VarDecl::None, 0)); |
Jay Foad | beaaccd | 2009-05-21 09:52:38 +0000 | [diff] [blame] | 489 | New->setParams(Context, Params.data(), Params.size()); |
Chris Lattner | 95e2c71 | 2008-05-05 22:18:14 +0000 | [diff] [blame] | 490 | } |
| 491 | |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 492 | AddKnownFunctionAttributes(New); |
Chris Lattner | 95e2c71 | 2008-05-05 22:18:14 +0000 | [diff] [blame] | 493 | |
Chris Lattner | 7f925cc | 2008-04-11 07:00:53 +0000 | [diff] [blame] | 494 | // TUScope is the translation-unit scope to insert this function into. |
Douglas Gregor | a8cc8ce | 2009-01-09 18:51:29 +0000 | [diff] [blame] | 495 | // FIXME: This is hideous. We need to teach PushOnScopeChains to |
| 496 | // relate Scopes to DeclContexts, and probably eliminate CurContext |
| 497 | // entirely, but we're not there yet. |
| 498 | DeclContext *SavedContext = CurContext; |
| 499 | CurContext = Context.getTranslationUnitDecl(); |
Argyrios Kyrtzidis | 00bc645 | 2008-05-09 23:39:43 +0000 | [diff] [blame] | 500 | PushOnScopeChains(New, TUScope); |
Douglas Gregor | a8cc8ce | 2009-01-09 18:51:29 +0000 | [diff] [blame] | 501 | CurContext = SavedContext; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 502 | return New; |
| 503 | } |
| 504 | |
Sebastian Redl | c42e118 | 2008-11-11 11:37:55 +0000 | [diff] [blame] | 505 | /// GetStdNamespace - This method gets the C++ "std" namespace. This is where |
| 506 | /// everything from the standard library is defined. |
| 507 | NamespaceDecl *Sema::GetStdNamespace() { |
| 508 | if (!StdNamespace) { |
Chris Lattner | 8edea83 | 2008-11-20 05:45:14 +0000 | [diff] [blame] | 509 | IdentifierInfo *StdIdent = &PP.getIdentifierTable().get("std"); |
Sebastian Redl | c42e118 | 2008-11-11 11:37:55 +0000 | [diff] [blame] | 510 | DeclContext *Global = Context.getTranslationUnitDecl(); |
Douglas Gregor | 4c921ae | 2009-01-30 01:04:22 +0000 | [diff] [blame] | 511 | Decl *Std = LookupQualifiedName(Global, StdIdent, LookupNamespaceName); |
Sebastian Redl | c42e118 | 2008-11-11 11:37:55 +0000 | [diff] [blame] | 512 | StdNamespace = dyn_cast_or_null<NamespaceDecl>(Std); |
| 513 | } |
| 514 | return StdNamespace; |
| 515 | } |
| 516 | |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 517 | /// MergeTypeDefDecl - We just parsed a typedef 'New' which has the |
| 518 | /// same name and scope as a previous declaration 'Old'. Figure out |
| 519 | /// how to resolve this situation, merging decls or emitting |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 520 | /// 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] | 521 | /// |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 522 | void Sema::MergeTypeDefDecl(TypedefDecl *New, Decl *OldD) { |
| 523 | // If either decl is known invalid already, set the new one to be invalid and |
| 524 | // don't bother doing any merging checks. |
| 525 | if (New->isInvalidDecl() || OldD->isInvalidDecl()) |
| 526 | return New->setInvalidDecl(); |
| 527 | |
Steve Naroff | 2b255c4 | 2008-09-09 14:32:20 +0000 | [diff] [blame] | 528 | // Allow multiple definitions for ObjC built-in typedefs. |
| 529 | // FIXME: Verify the underlying types are equivalent! |
| 530 | if (getLangOptions().ObjC1) { |
Chris Lattner | 2bac0f6 | 2008-11-20 05:41:43 +0000 | [diff] [blame] | 531 | const IdentifierInfo *TypeID = New->getIdentifier(); |
| 532 | switch (TypeID->getLength()) { |
| 533 | default: break; |
| 534 | case 2: |
| 535 | if (!TypeID->isStr("id")) |
| 536 | break; |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 537 | // Install the built-in type for 'id', ignoring the current definition. |
| 538 | New->setTypeForDecl(Context.getObjCIdType().getTypePtr()); |
| 539 | return; |
Chris Lattner | 2bac0f6 | 2008-11-20 05:41:43 +0000 | [diff] [blame] | 540 | case 5: |
| 541 | if (!TypeID->isStr("Class")) |
| 542 | break; |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 543 | // Install the built-in type for 'Class', ignoring the current definition. |
| 544 | New->setTypeForDecl(Context.getObjCClassType().getTypePtr()); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 545 | return; |
Chris Lattner | 2bac0f6 | 2008-11-20 05:41:43 +0000 | [diff] [blame] | 546 | case 3: |
| 547 | if (!TypeID->isStr("SEL")) |
| 548 | break; |
Douglas Gregor | 319ac89 | 2009-04-23 22:29:11 +0000 | [diff] [blame] | 549 | Context.setObjCSelType(Context.getTypeDeclType(New)); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 550 | return; |
Chris Lattner | 2bac0f6 | 2008-11-20 05:41:43 +0000 | [diff] [blame] | 551 | case 8: |
| 552 | if (!TypeID->isStr("Protocol")) |
| 553 | break; |
Steve Naroff | 2b255c4 | 2008-09-09 14:32:20 +0000 | [diff] [blame] | 554 | Context.setObjCProtoType(New->getUnderlyingType()); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 555 | return; |
Steve Naroff | 2b255c4 | 2008-09-09 14:32:20 +0000 | [diff] [blame] | 556 | } |
| 557 | // Fall through - the typedef name was not a builtin type. |
| 558 | } |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 559 | // Verify the old decl was also a type. |
| 560 | TypeDecl *Old = dyn_cast<TypeDecl>(OldD); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 561 | if (!Old) { |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 562 | Diag(New->getLocation(), diag::err_redefinition_different_kind) |
Chris Lattner | 08631c5 | 2008-11-23 21:45:46 +0000 | [diff] [blame] | 563 | << New->getDeclName(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 564 | if (OldD->getLocation().isValid()) |
Fariborz Jahanian | c55a240 | 2009-01-16 19:58:32 +0000 | [diff] [blame] | 565 | Diag(OldD->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 566 | return New->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 567 | } |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 568 | |
| 569 | // Determine the "old" type we'll use for checking and diagnostics. |
| 570 | QualType OldType; |
| 571 | if (TypedefDecl *OldTypedef = dyn_cast<TypedefDecl>(Old)) |
| 572 | OldType = OldTypedef->getUnderlyingType(); |
| 573 | else |
| 574 | OldType = Context.getTypeDeclType(Old); |
| 575 | |
Chris Lattner | 99cb997 | 2008-07-25 18:44:27 +0000 | [diff] [blame] | 576 | // If the typedef types are not identical, reject them in all languages and |
| 577 | // with any extensions enabled. |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 578 | |
| 579 | if (OldType != New->getUnderlyingType() && |
| 580 | Context.getCanonicalType(OldType) != |
Chris Lattner | 99cb997 | 2008-07-25 18:44:27 +0000 | [diff] [blame] | 581 | Context.getCanonicalType(New->getUnderlyingType())) { |
Chris Lattner | 5dc266a | 2008-11-20 06:13:02 +0000 | [diff] [blame] | 582 | Diag(New->getLocation(), diag::err_redefinition_different_typedef) |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 583 | << New->getUnderlyingType() << OldType; |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 584 | if (Old->getLocation().isValid()) |
Fariborz Jahanian | c55a240 | 2009-01-16 19:58:32 +0000 | [diff] [blame] | 585 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 586 | return New->setInvalidDecl(); |
Chris Lattner | 99cb997 | 2008-07-25 18:44:27 +0000 | [diff] [blame] | 587 | } |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 588 | |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 589 | if (getLangOptions().Microsoft) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 590 | return; |
Eli Friedman | 54ecfce | 2008-06-11 06:20:39 +0000 | [diff] [blame] | 591 | |
Douglas Gregor | bbe2743 | 2008-11-21 16:29:06 +0000 | [diff] [blame] | 592 | // C++ [dcl.typedef]p2: |
| 593 | // In a given non-class scope, a typedef specifier can be used to |
| 594 | // redefine the name of any type declared in that scope to refer |
| 595 | // to the type to which it already refers. |
Chris Lattner | 32b0675 | 2009-04-17 22:04:20 +0000 | [diff] [blame] | 596 | if (getLangOptions().CPlusPlus) { |
| 597 | if (!isa<CXXRecordDecl>(CurContext)) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 598 | return; |
Chris Lattner | 32b0675 | 2009-04-17 22:04:20 +0000 | [diff] [blame] | 599 | Diag(New->getLocation(), diag::err_redefinition) |
| 600 | << New->getDeclName(); |
| 601 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 602 | return New->setInvalidDecl(); |
Daniel Dunbar | 2fe0997 | 2008-09-12 18:10:20 +0000 | [diff] [blame] | 603 | } |
Eli Friedman | 54ecfce | 2008-06-11 06:20:39 +0000 | [diff] [blame] | 604 | |
Chris Lattner | 32b0675 | 2009-04-17 22:04:20 +0000 | [diff] [blame] | 605 | // If we have a redefinition of a typedef in C, emit a warning. This warning |
| 606 | // is normally mapped to an error, but can be controlled with |
Eli Friedman | 340a4e5 | 2009-06-04 23:03:07 +0000 | [diff] [blame] | 607 | // -Wtypedef-redefinition. If either the original or the redefinition is |
| 608 | // in a system header, don't emit this for compatibility with GCC. |
Chris Lattner | d0359af | 2009-04-27 01:46:12 +0000 | [diff] [blame] | 609 | if (PP.getDiagnostics().getSuppressSystemWarnings() && |
Eli Friedman | 340a4e5 | 2009-06-04 23:03:07 +0000 | [diff] [blame] | 610 | (Context.getSourceManager().isInSystemHeader(Old->getLocation()) || |
| 611 | Context.getSourceManager().isInSystemHeader(New->getLocation()))) |
Chris Lattner | d0359af | 2009-04-27 01:46:12 +0000 | [diff] [blame] | 612 | return; |
| 613 | |
Chris Lattner | 32b0675 | 2009-04-17 22:04:20 +0000 | [diff] [blame] | 614 | Diag(New->getLocation(), diag::warn_redefinition_of_typedef) |
| 615 | << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 616 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 617 | return; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 618 | } |
| 619 | |
Chris Lattner | 6b6b537 | 2008-06-26 18:38:35 +0000 | [diff] [blame] | 620 | /// DeclhasAttr - returns true if decl Declaration already has the target |
| 621 | /// attribute. |
Douglas Gregor | 68584ed | 2009-06-18 16:11:24 +0000 | [diff] [blame] | 622 | static bool |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 623 | DeclHasAttr(const Decl *decl, const Attr *target) { |
| 624 | for (const Attr *attr = decl->getAttrs(); attr; attr = attr->getNext()) |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 625 | if (attr->getKind() == target->getKind()) |
| 626 | return true; |
| 627 | |
| 628 | return false; |
| 629 | } |
| 630 | |
| 631 | /// MergeAttributes - append attributes from the Old decl to the New one. |
Chris Lattner | cc58147 | 2009-03-04 06:05:19 +0000 | [diff] [blame] | 632 | static void MergeAttributes(Decl *New, Decl *Old, ASTContext &C) { |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 633 | for (const Attr *attr = Old->getAttrs(); attr; attr = attr->getNext()) { |
| 634 | if (!DeclHasAttr(New, attr) && attr->isMerged()) { |
Douglas Gregor | 9f9bf25 | 2009-04-28 06:37:30 +0000 | [diff] [blame] | 635 | Attr *NewAttr = attr->clone(C); |
| 636 | NewAttr->setInherited(true); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 637 | New->addAttr(NewAttr); |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 638 | } |
| 639 | } |
| 640 | } |
| 641 | |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 642 | /// Used in MergeFunctionDecl to keep track of function parameters in |
| 643 | /// C. |
| 644 | struct GNUCompatibleParamWarning { |
| 645 | ParmVarDecl *OldParm; |
| 646 | ParmVarDecl *NewParm; |
| 647 | QualType PromotedType; |
| 648 | }; |
| 649 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 650 | /// MergeFunctionDecl - We just parsed a function 'New' from |
| 651 | /// declarator D which has the same name and scope as a previous |
| 652 | /// declaration 'Old'. Figure out how to resolve this situation, |
| 653 | /// merging decls or emitting diagnostics as appropriate. |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 654 | /// |
| 655 | /// In C++, New and Old must be declarations that are not |
| 656 | /// overloaded. Use IsOverload to determine whether New and Old are |
| 657 | /// overloaded, and to select the Old declaration that New should be |
| 658 | /// merged with. |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 659 | /// |
| 660 | /// Returns true if there was an error, false otherwise. |
| 661 | bool Sema::MergeFunctionDecl(FunctionDecl *New, Decl *OldD) { |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 662 | assert(!isa<OverloadedFunctionDecl>(OldD) && |
| 663 | "Cannot merge with an overloaded function declaration"); |
| 664 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 665 | // Verify the old decl was also a function. |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 666 | FunctionDecl *Old = 0; |
| 667 | if (FunctionTemplateDecl *OldFunctionTemplate |
| 668 | = dyn_cast<FunctionTemplateDecl>(OldD)) |
| 669 | Old = OldFunctionTemplate->getTemplatedDecl(); |
| 670 | else |
| 671 | Old = dyn_cast<FunctionDecl>(OldD); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 672 | if (!Old) { |
Chris Lattner | 5dc266a | 2008-11-20 06:13:02 +0000 | [diff] [blame] | 673 | Diag(New->getLocation(), diag::err_redefinition_different_kind) |
Chris Lattner | 08631c5 | 2008-11-23 21:45:46 +0000 | [diff] [blame] | 674 | << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 675 | Diag(OldD->getLocation(), diag::note_previous_definition); |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 676 | return true; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 677 | } |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 678 | |
| 679 | // Determine whether the previous declaration was a definition, |
| 680 | // implicit declaration, or a declaration. |
| 681 | diag::kind PrevDiag; |
| 682 | if (Old->isThisDeclarationADefinition()) |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 683 | PrevDiag = diag::note_previous_definition; |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 684 | else if (Old->isImplicit()) |
| 685 | PrevDiag = diag::note_previous_implicit_declaration; |
| 686 | else |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 687 | PrevDiag = diag::note_previous_declaration; |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 688 | |
Chris Lattner | 8bcfc5b | 2008-04-06 23:10:54 +0000 | [diff] [blame] | 689 | QualType OldQType = Context.getCanonicalType(Old->getType()); |
| 690 | QualType NewQType = Context.getCanonicalType(New->getType()); |
Chris Lattner | 5519644 | 2007-11-20 19:04:50 +0000 | [diff] [blame] | 691 | |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 692 | if (!isa<CXXMethodDecl>(New) && !isa<CXXMethodDecl>(Old) && |
| 693 | New->getStorageClass() == FunctionDecl::Static && |
| 694 | Old->getStorageClass() != FunctionDecl::Static) { |
| 695 | Diag(New->getLocation(), diag::err_static_non_static) |
| 696 | << New; |
| 697 | Diag(Old->getLocation(), PrevDiag); |
| 698 | return true; |
| 699 | } |
| 700 | |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 701 | if (getLangOptions().CPlusPlus) { |
| 702 | // (C++98 13.1p2): |
| 703 | // Certain function declarations cannot be overloaded: |
| 704 | // -- Function declarations that differ only in the return type |
| 705 | // cannot be overloaded. |
| 706 | QualType OldReturnType |
| 707 | = cast<FunctionType>(OldQType.getTypePtr())->getResultType(); |
| 708 | QualType NewReturnType |
| 709 | = cast<FunctionType>(NewQType.getTypePtr())->getResultType(); |
| 710 | if (OldReturnType != NewReturnType) { |
| 711 | Diag(New->getLocation(), diag::err_ovl_diff_return_type); |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 712 | Diag(Old->getLocation(), PrevDiag) << Old << Old->getType(); |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 713 | return true; |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 714 | } |
| 715 | |
| 716 | const CXXMethodDecl* OldMethod = dyn_cast<CXXMethodDecl>(Old); |
| 717 | const CXXMethodDecl* NewMethod = dyn_cast<CXXMethodDecl>(New); |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 718 | if (OldMethod && NewMethod && |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 719 | NewMethod->getLexicalDeclContext()->isRecord()) { |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 720 | // -- Member function declarations with the same name and the |
| 721 | // same parameter types cannot be overloaded if any of them |
| 722 | // is a static member function declaration. |
| 723 | if (OldMethod->isStatic() || NewMethod->isStatic()) { |
| 724 | Diag(New->getLocation(), diag::err_ovl_static_nonstatic_member); |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 725 | Diag(Old->getLocation(), PrevDiag) << Old << Old->getType(); |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 726 | return true; |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 727 | } |
Douglas Gregor | 9e7d9de | 2008-12-15 21:24:18 +0000 | [diff] [blame] | 728 | |
| 729 | // C++ [class.mem]p1: |
| 730 | // [...] A member shall not be declared twice in the |
| 731 | // member-specification, except that a nested class or member |
| 732 | // class template can be declared and then later defined. |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 733 | unsigned NewDiag; |
| 734 | if (isa<CXXConstructorDecl>(OldMethod)) |
| 735 | NewDiag = diag::err_constructor_redeclared; |
| 736 | else if (isa<CXXDestructorDecl>(NewMethod)) |
| 737 | NewDiag = diag::err_destructor_redeclared; |
| 738 | else if (isa<CXXConversionDecl>(NewMethod)) |
| 739 | NewDiag = diag::err_conv_function_redeclared; |
| 740 | else |
| 741 | NewDiag = diag::err_member_redeclared; |
| 742 | |
| 743 | Diag(New->getLocation(), NewDiag); |
| 744 | Diag(Old->getLocation(), PrevDiag) << Old << Old->getType(); |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 745 | } |
| 746 | |
| 747 | // (C++98 8.3.5p3): |
| 748 | // All declarations for a function shall agree exactly in both the |
| 749 | // return type and the parameter-type-list. |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 750 | if (OldQType == NewQType) |
| 751 | return MergeCompatibleFunctionDecls(New, Old); |
Douglas Gregor | 8e9bebd | 2008-10-21 16:13:35 +0000 | [diff] [blame] | 752 | |
| 753 | // Fall through for conflicting redeclarations and redefinitions. |
Douglas Gregor | f009795 | 2008-04-21 02:02:58 +0000 | [diff] [blame] | 754 | } |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 755 | |
| 756 | // C: Function types need to be compatible, not identical. This handles |
Steve Naroff | adbbd0c | 2008-01-14 20:51:29 +0000 | [diff] [blame] | 757 | // duplicate function decls like "void f(int); void f(enum X);" properly. |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 758 | if (!getLangOptions().CPlusPlus && |
Eli Friedman | 3d815e7 | 2008-08-22 00:56:42 +0000 | [diff] [blame] | 759 | Context.typesAreCompatible(OldQType, NewQType)) { |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 760 | const FunctionType *OldFuncType = OldQType->getAsFunctionType(); |
Douglas Gregor | 6871981 | 2009-02-16 18:20:44 +0000 | [diff] [blame] | 761 | const FunctionType *NewFuncType = NewQType->getAsFunctionType(); |
Douglas Gregor | 72564e7 | 2009-02-26 23:50:07 +0000 | [diff] [blame] | 762 | const FunctionProtoType *OldProto = 0; |
| 763 | if (isa<FunctionNoProtoType>(NewFuncType) && |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 764 | (OldProto = dyn_cast<FunctionProtoType>(OldFuncType))) { |
Douglas Gregor | 6871981 | 2009-02-16 18:20:44 +0000 | [diff] [blame] | 765 | // The old declaration provided a function prototype, but the |
| 766 | // new declaration does not. Merge in the prototype. |
Sebastian Redl | 465226e | 2009-05-27 22:11:52 +0000 | [diff] [blame] | 767 | assert(!OldProto->hasExceptionSpec() && "Exception spec in C"); |
Douglas Gregor | 6871981 | 2009-02-16 18:20:44 +0000 | [diff] [blame] | 768 | llvm::SmallVector<QualType, 16> ParamTypes(OldProto->arg_type_begin(), |
| 769 | OldProto->arg_type_end()); |
| 770 | NewQType = Context.getFunctionType(NewFuncType->getResultType(), |
Jay Foad | beaaccd | 2009-05-21 09:52:38 +0000 | [diff] [blame] | 771 | ParamTypes.data(), ParamTypes.size(), |
Douglas Gregor | 6871981 | 2009-02-16 18:20:44 +0000 | [diff] [blame] | 772 | OldProto->isVariadic(), |
| 773 | OldProto->getTypeQuals()); |
| 774 | New->setType(NewQType); |
Anders Carlsson | a75e853 | 2009-05-14 21:46:00 +0000 | [diff] [blame] | 775 | New->setHasInheritedPrototype(); |
Douglas Gregor | 450da98 | 2009-02-16 20:58:07 +0000 | [diff] [blame] | 776 | |
| 777 | // Synthesize a parameter for each argument type. |
| 778 | llvm::SmallVector<ParmVarDecl*, 16> Params; |
Douglas Gregor | 72564e7 | 2009-02-26 23:50:07 +0000 | [diff] [blame] | 779 | for (FunctionProtoType::arg_type_iterator |
Douglas Gregor | 450da98 | 2009-02-16 20:58:07 +0000 | [diff] [blame] | 780 | ParamType = OldProto->arg_type_begin(), |
| 781 | ParamEnd = OldProto->arg_type_end(); |
| 782 | ParamType != ParamEnd; ++ParamType) { |
| 783 | ParmVarDecl *Param = ParmVarDecl::Create(Context, New, |
| 784 | SourceLocation(), 0, |
| 785 | *ParamType, VarDecl::None, |
| 786 | 0); |
| 787 | Param->setImplicit(); |
| 788 | Params.push_back(Param); |
| 789 | } |
| 790 | |
Jay Foad | beaaccd | 2009-05-21 09:52:38 +0000 | [diff] [blame] | 791 | New->setParams(Context, Params.data(), Params.size()); |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 792 | } |
Douglas Gregor | 6871981 | 2009-02-16 18:20:44 +0000 | [diff] [blame] | 793 | |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 794 | return MergeCompatibleFunctionDecls(New, Old); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 795 | } |
Chris Lattner | e3995fe | 2007-11-06 06:07:26 +0000 | [diff] [blame] | 796 | |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 797 | // GNU C permits a K&R definition to follow a prototype declaration |
| 798 | // if the declared types of the parameters in the K&R definition |
| 799 | // match the types in the prototype declaration, even when the |
| 800 | // promoted types of the parameters from the K&R definition differ |
| 801 | // from the types in the prototype. GCC then keeps the types from |
| 802 | // the prototype. |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 803 | // |
| 804 | // If a variadic prototype is followed by a non-variadic K&R definition, |
| 805 | // the K&R definition becomes variadic. This is sort of an edge case, but |
| 806 | // it's legal per the standard depending on how you read C99 6.7.5.3p15 and |
| 807 | // C99 6.9.1p8. |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 808 | if (!getLangOptions().CPlusPlus && |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 809 | Old->hasPrototype() && !New->hasPrototype() && |
| 810 | New->getType()->getAsFunctionProtoType() && |
| 811 | Old->getNumParams() == New->getNumParams()) { |
| 812 | llvm::SmallVector<QualType, 16> ArgTypes; |
| 813 | llvm::SmallVector<GNUCompatibleParamWarning, 16> Warnings; |
| 814 | const FunctionProtoType *OldProto |
| 815 | = Old->getType()->getAsFunctionProtoType(); |
| 816 | const FunctionProtoType *NewProto |
| 817 | = New->getType()->getAsFunctionProtoType(); |
| 818 | |
| 819 | // Determine whether this is the GNU C extension. |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 820 | QualType MergedReturn = Context.mergeTypes(OldProto->getResultType(), |
| 821 | NewProto->getResultType()); |
| 822 | bool LooseCompatible = !MergedReturn.isNull(); |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 823 | for (unsigned Idx = 0, End = Old->getNumParams(); |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 824 | LooseCompatible && Idx != End; ++Idx) { |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 825 | ParmVarDecl *OldParm = Old->getParamDecl(Idx); |
| 826 | ParmVarDecl *NewParm = New->getParamDecl(Idx); |
| 827 | if (Context.typesAreCompatible(OldParm->getType(), |
| 828 | NewProto->getArgType(Idx))) { |
| 829 | ArgTypes.push_back(NewParm->getType()); |
| 830 | } else if (Context.typesAreCompatible(OldParm->getType(), |
| 831 | NewParm->getType())) { |
| 832 | GNUCompatibleParamWarning Warn |
| 833 | = { OldParm, NewParm, NewProto->getArgType(Idx) }; |
| 834 | Warnings.push_back(Warn); |
| 835 | ArgTypes.push_back(NewParm->getType()); |
| 836 | } else |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 837 | LooseCompatible = false; |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 838 | } |
| 839 | |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 840 | if (LooseCompatible) { |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 841 | for (unsigned Warn = 0; Warn < Warnings.size(); ++Warn) { |
| 842 | Diag(Warnings[Warn].NewParm->getLocation(), |
| 843 | diag::ext_param_promoted_not_compatible_with_prototype) |
| 844 | << Warnings[Warn].PromotedType |
| 845 | << Warnings[Warn].OldParm->getType(); |
| 846 | Diag(Warnings[Warn].OldParm->getLocation(), |
| 847 | diag::note_previous_declaration); |
| 848 | } |
| 849 | |
Eli Friedman | bc4e29f | 2009-06-01 09:24:59 +0000 | [diff] [blame] | 850 | New->setType(Context.getFunctionType(MergedReturn, &ArgTypes[0], |
| 851 | ArgTypes.size(), |
| 852 | OldProto->isVariadic(), 0)); |
Douglas Gregor | c837656 | 2009-03-06 22:43:54 +0000 | [diff] [blame] | 853 | return MergeCompatibleFunctionDecls(New, Old); |
| 854 | } |
| 855 | |
| 856 | // Fall through to diagnose conflicting types. |
| 857 | } |
| 858 | |
Steve Naroff | 837618c | 2008-01-16 15:01:34 +0000 | [diff] [blame] | 859 | // A function that has already been declared has been redeclared or defined |
| 860 | // with a different type- show appropriate diagnostic |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 861 | if (unsigned BuiltinID = Old->getBuiltinID(Context)) { |
| 862 | // The user has declared a builtin function with an incompatible |
| 863 | // signature. |
| 864 | if (Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) { |
| 865 | // The function the user is redeclaring is a library-defined |
| 866 | // function like 'malloc' or 'printf'. Warn about the |
Douglas Gregor | 374e156 | 2009-03-23 17:47:24 +0000 | [diff] [blame] | 867 | // redeclaration, then pretend that we don't know about this |
| 868 | // library built-in. |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 869 | Diag(New->getLocation(), diag::warn_redecl_library_builtin) << New; |
| 870 | Diag(Old->getLocation(), diag::note_previous_builtin_declaration) |
| 871 | << Old << Old->getType(); |
Douglas Gregor | 374e156 | 2009-03-23 17:47:24 +0000 | [diff] [blame] | 872 | New->getIdentifier()->setBuiltinID(Builtin::NotBuiltin); |
| 873 | Old->setInvalidDecl(); |
| 874 | return false; |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 875 | } |
Steve Naroff | 837618c | 2008-01-16 15:01:34 +0000 | [diff] [blame] | 876 | |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 877 | PrevDiag = diag::note_previous_builtin_declaration; |
| 878 | } |
| 879 | |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 880 | Diag(New->getLocation(), diag::err_conflicting_types) << New->getDeclName(); |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 881 | Diag(Old->getLocation(), PrevDiag) << Old << Old->getType(); |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 882 | return true; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 883 | } |
| 884 | |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 885 | /// \brief Completes the merge of two function declarations that are |
| 886 | /// known to be compatible. |
| 887 | /// |
| 888 | /// This routine handles the merging of attributes and other |
| 889 | /// properties of function declarations form the old declaration to |
| 890 | /// the new declaration, once we know that New is in fact a |
| 891 | /// redeclaration of Old. |
| 892 | /// |
| 893 | /// \returns false |
| 894 | bool Sema::MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old) { |
| 895 | // Merge the attributes |
Chris Lattner | cc58147 | 2009-03-04 06:05:19 +0000 | [diff] [blame] | 896 | MergeAttributes(New, Old, Context); |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 897 | |
| 898 | // Merge the storage class. |
Douglas Gregor | 9f9bf25 | 2009-04-28 06:37:30 +0000 | [diff] [blame] | 899 | if (Old->getStorageClass() != FunctionDecl::Extern) |
| 900 | New->setStorageClass(Old->getStorageClass()); |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 901 | |
Douglas Gregor | b3efa98 | 2009-04-23 18:22:55 +0000 | [diff] [blame] | 902 | // Merge "inline" |
| 903 | if (Old->isInline()) |
| 904 | New->setInline(true); |
| 905 | |
| 906 | // If this function declaration by itself qualifies as a C99 inline |
| 907 | // definition (C99 6.7.4p6), but the previous definition did not, |
| 908 | // then the function is not a C99 inline definition. |
| 909 | if (New->isC99InlineDefinition() && !Old->isC99InlineDefinition()) |
| 910 | New->setC99InlineDefinition(false); |
| 911 | else if (Old->isC99InlineDefinition() && !New->isC99InlineDefinition()) { |
| 912 | // Mark all preceding definitions as not being C99 inline definitions. |
| 913 | for (const FunctionDecl *Prev = Old; Prev; |
| 914 | Prev = Prev->getPreviousDeclaration()) |
| 915 | const_cast<FunctionDecl *>(Prev)->setC99InlineDefinition(false); |
| 916 | } |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 917 | |
| 918 | // Merge "pure" flag. |
| 919 | if (Old->isPure()) |
| 920 | New->setPure(); |
| 921 | |
| 922 | // Merge the "deleted" flag. |
| 923 | if (Old->isDeleted()) |
| 924 | New->setDeleted(); |
| 925 | |
| 926 | if (getLangOptions().CPlusPlus) |
| 927 | return MergeCXXFunctionDecl(New, Old); |
| 928 | |
| 929 | return false; |
| 930 | } |
| 931 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 932 | /// MergeVarDecl - We just parsed a variable 'New' which has the same name |
| 933 | /// and scope as a previous declaration 'Old'. Figure out how to resolve this |
| 934 | /// situation, merging decls or emitting diagnostics as appropriate. |
| 935 | /// |
Steve Naroff | ff9eb1f | 2008-08-08 17:50:35 +0000 | [diff] [blame] | 936 | /// Tentative definition rules (C99 6.9.2p2) are checked by |
| 937 | /// FinalizeDeclaratorGroup. Unfortunately, we can't analyze tentative |
| 938 | /// definitions here, since the initializer hasn't been attached. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 939 | /// |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 940 | void Sema::MergeVarDecl(VarDecl *New, Decl *OldD) { |
| 941 | // If either decl is invalid, make sure the new one is marked invalid and |
| 942 | // don't do any other checking. |
| 943 | if (New->isInvalidDecl() || OldD->isInvalidDecl()) |
| 944 | return New->setInvalidDecl(); |
| 945 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 946 | // Verify the old decl was also a variable. |
| 947 | VarDecl *Old = dyn_cast<VarDecl>(OldD); |
| 948 | if (!Old) { |
Chris Lattner | f3a41af | 2008-11-20 06:38:18 +0000 | [diff] [blame] | 949 | Diag(New->getLocation(), diag::err_redefinition_different_kind) |
Chris Lattner | 08631c5 | 2008-11-23 21:45:46 +0000 | [diff] [blame] | 950 | << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 951 | Diag(OldD->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 952 | return New->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 953 | } |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 954 | |
Chris Lattner | cc58147 | 2009-03-04 06:05:19 +0000 | [diff] [blame] | 955 | MergeAttributes(New, Old, Context); |
Chris Lattner | ddee423 | 2008-03-03 03:28:21 +0000 | [diff] [blame] | 956 | |
Eli Friedman | 13ca96a | 2009-01-24 23:49:55 +0000 | [diff] [blame] | 957 | // Merge the types |
Eli Friedman | 88d936b | 2009-05-16 13:54:38 +0000 | [diff] [blame] | 958 | QualType MergedT; |
| 959 | if (getLangOptions().CPlusPlus) { |
| 960 | if (Context.hasSameType(New->getType(), Old->getType())) |
| 961 | MergedT = New->getType(); |
| 962 | } else { |
| 963 | MergedT = Context.mergeTypes(New->getType(), Old->getType()); |
| 964 | } |
Eli Friedman | 13ca96a | 2009-01-24 23:49:55 +0000 | [diff] [blame] | 965 | if (MergedT.isNull()) { |
Douglas Gregor | 6037fcb | 2009-01-09 19:42:16 +0000 | [diff] [blame] | 966 | Diag(New->getLocation(), diag::err_redefinition_different_type) |
| 967 | << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 968 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 969 | return New->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 970 | } |
Eli Friedman | 13ca96a | 2009-01-24 23:49:55 +0000 | [diff] [blame] | 971 | New->setType(MergedT); |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 972 | |
Steve Naroff | b7b032e | 2008-01-30 00:44:01 +0000 | [diff] [blame] | 973 | // C99 6.2.2p4: Check if we have a static decl followed by a non-static. |
| 974 | if (New->getStorageClass() == VarDecl::Static && |
Daniel Dunbar | 5466c7b | 2009-04-14 02:25:56 +0000 | [diff] [blame] | 975 | (Old->getStorageClass() == VarDecl::None || Old->hasExternalStorage())) { |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 976 | Diag(New->getLocation(), diag::err_static_non_static) << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 977 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 978 | return New->setInvalidDecl(); |
Steve Naroff | b7b032e | 2008-01-30 00:44:01 +0000 | [diff] [blame] | 979 | } |
Douglas Gregor | 5ef122e | 2009-03-19 22:01:50 +0000 | [diff] [blame] | 980 | // C99 6.2.2p4: |
| 981 | // For an identifier declared with the storage-class specifier |
| 982 | // extern in a scope in which a prior declaration of that |
| 983 | // identifier is visible,23) if the prior declaration specifies |
| 984 | // internal or external linkage, the linkage of the identifier at |
| 985 | // the later declaration is the same as the linkage specified at |
| 986 | // the prior declaration. If no prior declaration is visible, or |
| 987 | // if the prior declaration specifies no linkage, then the |
| 988 | // identifier has external linkage. |
Douglas Gregor | 38179b2 | 2009-03-23 16:17:01 +0000 | [diff] [blame] | 989 | if (New->hasExternalStorage() && Old->hasLinkage()) |
Douglas Gregor | 5ef122e | 2009-03-19 22:01:50 +0000 | [diff] [blame] | 990 | /* Okay */; |
| 991 | else if (New->getStorageClass() != VarDecl::Static && |
| 992 | Old->getStorageClass() == VarDecl::Static) { |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 993 | Diag(New->getLocation(), diag::err_non_static_static) << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 994 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 995 | return New->setInvalidDecl(); |
Steve Naroff | b7b032e | 2008-01-30 00:44:01 +0000 | [diff] [blame] | 996 | } |
Daniel Dunbar | 5466c7b | 2009-04-14 02:25:56 +0000 | [diff] [blame] | 997 | |
Steve Naroff | 094cefb | 2008-09-17 14:05:40 +0000 | [diff] [blame] | 998 | // Variables with external linkage are analyzed in FinalizeDeclaratorGroup. |
Daniel Dunbar | 5466c7b | 2009-04-14 02:25:56 +0000 | [diff] [blame] | 999 | |
| 1000 | // FIXME: The test for external storage here seems wrong? We still |
| 1001 | // need to check for mismatches. |
| 1002 | if (!New->hasExternalStorage() && !New->isFileVarDecl() && |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 1003 | // Don't complain about out-of-line definitions of static members. |
| 1004 | !(Old->getLexicalDeclContext()->isRecord() && |
| 1005 | !New->getLexicalDeclContext()->isRecord())) { |
Chris Lattner | 08631c5 | 2008-11-23 21:45:46 +0000 | [diff] [blame] | 1006 | Diag(New->getLocation(), diag::err_redefinition) << New->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 1007 | Diag(Old->getLocation(), diag::note_previous_definition); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1008 | return New->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1009 | } |
Douglas Gregor | 275a369 | 2009-03-10 23:43:53 +0000 | [diff] [blame] | 1010 | |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 1011 | if (New->isThreadSpecified() && !Old->isThreadSpecified()) { |
| 1012 | Diag(New->getLocation(), diag::err_thread_non_thread) << New->getDeclName(); |
| 1013 | Diag(Old->getLocation(), diag::note_previous_definition); |
| 1014 | } else if (!New->isThreadSpecified() && Old->isThreadSpecified()) { |
| 1015 | Diag(New->getLocation(), diag::err_non_thread_thread) << New->getDeclName(); |
| 1016 | Diag(Old->getLocation(), diag::note_previous_definition); |
| 1017 | } |
| 1018 | |
Douglas Gregor | 275a369 | 2009-03-10 23:43:53 +0000 | [diff] [blame] | 1019 | // Keep a chain of previous declarations. |
| 1020 | New->setPreviousDeclaration(Old); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1021 | } |
| 1022 | |
Mike Stump | 5f28a1e | 2009-07-24 02:49:01 +0000 | [diff] [blame] | 1023 | /// CheckFallThrough - Check that we don't fall off the end of a |
| 1024 | /// Statement that should return a value. |
| 1025 | /// |
| 1026 | /// \returns AlwaysFallThrough iff we always fall off the end of the statement, |
| 1027 | /// MaybeFallThrough iff we might or might not fall off the end and |
| 1028 | /// NeverFallThrough iff we never fall off the end of the statement. We assume |
| 1029 | /// that functions not marked noreturn will return. |
Mike Stump | b1682c5 | 2009-07-22 23:56:57 +0000 | [diff] [blame] | 1030 | Sema::ControlFlowKind Sema::CheckFallThrough(Stmt *Root) { |
| 1031 | llvm::OwningPtr<CFG> cfg (CFG::buildCFG(Root, &Context)); |
| 1032 | |
| 1033 | // FIXME: They should never return 0, fix that, delete this code. |
| 1034 | if (cfg == 0) |
| 1035 | return NeverFallThrough; |
Mike Stump | 79a1411 | 2009-07-23 22:40:11 +0000 | [diff] [blame] | 1036 | // The CFG leaves in dead things, and we don't want to dead code paths to |
| 1037 | // confuse us, so we mark all live things first. |
Mike Stump | b1682c5 | 2009-07-22 23:56:57 +0000 | [diff] [blame] | 1038 | std::queue<CFGBlock*> workq; |
Daniel Dunbar | 1f15e76 | 2009-07-23 05:01:54 +0000 | [diff] [blame] | 1039 | llvm::BitVector live(cfg->getNumBlockIDs()); |
Mike Stump | b1682c5 | 2009-07-22 23:56:57 +0000 | [diff] [blame] | 1040 | // Prep work queue |
| 1041 | workq.push(&cfg->getEntry()); |
| 1042 | // Solve |
| 1043 | while (!workq.empty()) { |
| 1044 | CFGBlock *item = workq.front(); |
| 1045 | workq.pop(); |
Daniel Dunbar | 1f15e76 | 2009-07-23 05:01:54 +0000 | [diff] [blame] | 1046 | live.set(item->getBlockID()); |
Mike Stump | 79a1411 | 2009-07-23 22:40:11 +0000 | [diff] [blame] | 1047 | for (CFGBlock::succ_iterator I=item->succ_begin(), |
| 1048 | E=item->succ_end(); |
| 1049 | I != E; |
| 1050 | ++I) { |
| 1051 | if ((*I) && !live[(*I)->getBlockID()]) { |
| 1052 | live.set((*I)->getBlockID()); |
| 1053 | workq.push(*I); |
Mike Stump | b1682c5 | 2009-07-22 23:56:57 +0000 | [diff] [blame] | 1054 | } |
| 1055 | } |
| 1056 | } |
| 1057 | |
Mike Stump | 79a1411 | 2009-07-23 22:40:11 +0000 | [diff] [blame] | 1058 | // Now we know what is live, we check the live precessors of the exit block |
| 1059 | // and look for fall through paths, being careful to ignore normal returns, |
| 1060 | // and exceptional paths. |
Mike Stump | b1682c5 | 2009-07-22 23:56:57 +0000 | [diff] [blame] | 1061 | bool HasLiveReturn = false; |
| 1062 | bool HasFakeEdge = false; |
| 1063 | bool HasPlainEdge = false; |
Mike Stump | 79a1411 | 2009-07-23 22:40:11 +0000 | [diff] [blame] | 1064 | for (CFGBlock::succ_iterator I=cfg->getExit().pred_begin(), |
| 1065 | E = cfg->getExit().pred_end(); |
| 1066 | I != E; |
| 1067 | ++I) { |
| 1068 | CFGBlock& B = **I; |
| 1069 | if (!live[B.getBlockID()]) |
Mike Stump | b1682c5 | 2009-07-22 23:56:57 +0000 | [diff] [blame] | 1070 | continue; |
Mike Stump | 79a1411 | 2009-07-23 22:40:11 +0000 | [diff] [blame] | 1071 | if (B.size() == 0) { |
Mike Stump | b1682c5 | 2009-07-22 23:56:57 +0000 | [diff] [blame] | 1072 | // A labeled empty statement, or the entry block... |
| 1073 | HasPlainEdge = true; |
| 1074 | continue; |
| 1075 | } |
Mike Stump | 79a1411 | 2009-07-23 22:40:11 +0000 | [diff] [blame] | 1076 | Stmt *S = B[B.size()-1]; |
Mike Stump | b1682c5 | 2009-07-22 23:56:57 +0000 | [diff] [blame] | 1077 | if (isa<ReturnStmt>(S)) { |
| 1078 | HasLiveReturn = true; |
| 1079 | continue; |
| 1080 | } |
| 1081 | if (isa<ObjCAtThrowStmt>(S)) { |
| 1082 | HasFakeEdge = true; |
| 1083 | continue; |
| 1084 | } |
| 1085 | if (isa<CXXThrowExpr>(S)) { |
| 1086 | HasFakeEdge = true; |
| 1087 | continue; |
| 1088 | } |
| 1089 | bool NoReturnEdge = false; |
Mike Stump | 79a1411 | 2009-07-23 22:40:11 +0000 | [diff] [blame] | 1090 | if (CallExpr *C = dyn_cast<CallExpr>(S)) { |
| 1091 | Expr *CEE = C->getCallee()->IgnoreParenCasts(); |
Mike Stump | 2455636 | 2009-07-25 21:26:53 +0000 | [diff] [blame] | 1092 | if (CEE->getType().getNoReturnAttr()) { |
| 1093 | NoReturnEdge = true; |
| 1094 | HasFakeEdge = true; |
| 1095 | } else if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE)) { |
Mike Stump | 79a1411 | 2009-07-23 22:40:11 +0000 | [diff] [blame] | 1096 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(DRE->getDecl())) { |
| 1097 | if (FD->hasAttr<NoReturnAttr>()) { |
| 1098 | NoReturnEdge = true; |
| 1099 | HasFakeEdge = true; |
Mike Stump | b1682c5 | 2009-07-22 23:56:57 +0000 | [diff] [blame] | 1100 | } |
| 1101 | } |
| 1102 | } |
Mike Stump | 79a1411 | 2009-07-23 22:40:11 +0000 | [diff] [blame] | 1103 | } |
| 1104 | // FIXME: Add noreturn message sends. |
Mike Stump | b1682c5 | 2009-07-22 23:56:57 +0000 | [diff] [blame] | 1105 | if (NoReturnEdge == false) |
| 1106 | HasPlainEdge = true; |
| 1107 | } |
Mike Stump | 79a1411 | 2009-07-23 22:40:11 +0000 | [diff] [blame] | 1108 | if (!HasPlainEdge) |
| 1109 | return NeverFallThrough; |
| 1110 | if (HasFakeEdge || HasLiveReturn) |
| 1111 | return MaybeFallThrough; |
| 1112 | // This says AlwaysFallThrough for calls to functions that are not marked |
| 1113 | // noreturn, that don't return. If people would like this warning to be more |
| 1114 | // accurate, such functions should be marked as noreturn. |
| 1115 | return AlwaysFallThrough; |
Mike Stump | b1682c5 | 2009-07-22 23:56:57 +0000 | [diff] [blame] | 1116 | } |
| 1117 | |
| 1118 | /// CheckFallThroughForFunctionDef - Check that we don't fall off the end of a |
Mike Stump | 5f28a1e | 2009-07-24 02:49:01 +0000 | [diff] [blame] | 1119 | /// function that should return a value. Check that we don't fall off the end |
Mike Stump | 5692586 | 2009-07-28 22:04:01 +0000 | [diff] [blame] | 1120 | /// of a noreturn function. We assume that functions and blocks not marked |
| 1121 | /// noreturn will return. |
Mike Stump | b1682c5 | 2009-07-22 23:56:57 +0000 | [diff] [blame] | 1122 | void Sema::CheckFallThroughForFunctionDef(Decl *D, Stmt *Body) { |
Mike Stump | 79a1411 | 2009-07-23 22:40:11 +0000 | [diff] [blame] | 1123 | // FIXME: Would be nice if we had a better way to control cascading errors, |
| 1124 | // but for now, avoid them. The problem is that when Parse sees: |
| 1125 | // int foo() { return a; } |
| 1126 | // The return is eaten and the Sema code sees just: |
| 1127 | // int foo() { } |
| 1128 | // which this code would then warn about. |
Mike Stump | b1682c5 | 2009-07-22 23:56:57 +0000 | [diff] [blame] | 1129 | if (getDiagnostics().hasErrorOccurred()) |
| 1130 | return; |
Mike Stump | 5f28a1e | 2009-07-24 02:49:01 +0000 | [diff] [blame] | 1131 | bool ReturnsVoid = false; |
| 1132 | bool HasNoReturn = false; |
| 1133 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { |
| 1134 | if (FD->getResultType()->isVoidType()) |
| 1135 | ReturnsVoid = true; |
| 1136 | if (FD->hasAttr<NoReturnAttr>()) |
| 1137 | HasNoReturn = true; |
| 1138 | } else if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) { |
| 1139 | if (MD->getResultType()->isVoidType()) |
| 1140 | ReturnsVoid = true; |
| 1141 | if (MD->hasAttr<NoReturnAttr>()) |
| 1142 | HasNoReturn = true; |
| 1143 | } |
| 1144 | |
Mike Stump | 4d9d51a | 2009-07-28 23:11:12 +0000 | [diff] [blame] | 1145 | // Short circuit for compilation speed. |
Mike Stump | 5f28a1e | 2009-07-24 02:49:01 +0000 | [diff] [blame] | 1146 | if ((Diags.getDiagnosticLevel(diag::warn_maybe_falloff_nonvoid_function) |
| 1147 | == Diagnostic::Ignored || ReturnsVoid) |
| 1148 | && (Diags.getDiagnosticLevel(diag::warn_noreturn_function_has_return_expr) |
Mike Stump | 4d9d51a | 2009-07-28 23:11:12 +0000 | [diff] [blame] | 1149 | == Diagnostic::Ignored || !HasNoReturn) |
| 1150 | && (Diags.getDiagnosticLevel(diag::warn_suggest_noreturn_block) |
| 1151 | == Diagnostic::Ignored || !ReturnsVoid)) |
Mike Stump | b1682c5 | 2009-07-22 23:56:57 +0000 | [diff] [blame] | 1152 | return; |
| 1153 | // FIXME: Funtion try block |
| 1154 | if (CompoundStmt *Compound = dyn_cast<CompoundStmt>(Body)) { |
| 1155 | switch (CheckFallThrough(Body)) { |
| 1156 | case MaybeFallThrough: |
Mike Stump | 5f28a1e | 2009-07-24 02:49:01 +0000 | [diff] [blame] | 1157 | if (HasNoReturn) |
| 1158 | Diag(Compound->getRBracLoc(), diag::warn_falloff_noreturn_function); |
| 1159 | else if (!ReturnsVoid) |
| 1160 | Diag(Compound->getRBracLoc(),diag::warn_maybe_falloff_nonvoid_function); |
Mike Stump | b1682c5 | 2009-07-22 23:56:57 +0000 | [diff] [blame] | 1161 | break; |
| 1162 | case AlwaysFallThrough: |
Mike Stump | 5f28a1e | 2009-07-24 02:49:01 +0000 | [diff] [blame] | 1163 | if (HasNoReturn) |
| 1164 | Diag(Compound->getRBracLoc(), diag::warn_falloff_noreturn_function); |
| 1165 | else if (!ReturnsVoid) |
| 1166 | Diag(Compound->getRBracLoc(), diag::warn_falloff_nonvoid_function); |
Mike Stump | b1682c5 | 2009-07-22 23:56:57 +0000 | [diff] [blame] | 1167 | break; |
| 1168 | case NeverFallThrough: |
Mike Stump | 4d9d51a | 2009-07-28 23:11:12 +0000 | [diff] [blame] | 1169 | if (ReturnsVoid) |
| 1170 | Diag(Compound->getLBracLoc(), diag::warn_suggest_noreturn_function); |
Mike Stump | b1682c5 | 2009-07-22 23:56:57 +0000 | [diff] [blame] | 1171 | break; |
| 1172 | } |
| 1173 | } |
| 1174 | } |
| 1175 | |
Mike Stump | 5692586 | 2009-07-28 22:04:01 +0000 | [diff] [blame] | 1176 | /// CheckFallThroughForBlock - Check that we don't fall off the end of a block |
| 1177 | /// that should return a value. Check that we don't fall off the end of a |
| 1178 | /// noreturn block. We assume that functions and blocks not marked noreturn |
| 1179 | /// will return. |
| 1180 | void Sema::CheckFallThroughForBlock(QualType BlockTy, Stmt *Body) { |
| 1181 | // FIXME: Would be nice if we had a better way to control cascading errors, |
| 1182 | // but for now, avoid them. The problem is that when Parse sees: |
| 1183 | // int foo() { return a; } |
| 1184 | // The return is eaten and the Sema code sees just: |
| 1185 | // int foo() { } |
| 1186 | // which this code would then warn about. |
| 1187 | if (getDiagnostics().hasErrorOccurred()) |
| 1188 | return; |
| 1189 | bool ReturnsVoid = false; |
| 1190 | bool HasNoReturn = false; |
| 1191 | if (const FunctionType *FT = BlockTy->getPointeeType()->getAsFunctionType()) { |
| 1192 | if (FT->getResultType()->isVoidType()) |
| 1193 | ReturnsVoid = true; |
| 1194 | if (FT->getNoReturnAttr()) |
| 1195 | HasNoReturn = true; |
| 1196 | } |
| 1197 | |
Mike Stump | 4d9d51a | 2009-07-28 23:11:12 +0000 | [diff] [blame] | 1198 | // Short circuit for compilation speed. |
| 1199 | if (ReturnsVoid |
| 1200 | && !HasNoReturn |
| 1201 | && (Diags.getDiagnosticLevel(diag::warn_suggest_noreturn_block) |
| 1202 | == Diagnostic::Ignored || !ReturnsVoid)) |
Mike Stump | 5692586 | 2009-07-28 22:04:01 +0000 | [diff] [blame] | 1203 | return; |
| 1204 | // FIXME: Funtion try block |
| 1205 | if (CompoundStmt *Compound = dyn_cast<CompoundStmt>(Body)) { |
| 1206 | switch (CheckFallThrough(Body)) { |
| 1207 | case MaybeFallThrough: |
| 1208 | if (HasNoReturn) |
| 1209 | Diag(Compound->getRBracLoc(), diag::err_noreturn_block_has_return_expr); |
| 1210 | else if (!ReturnsVoid) |
| 1211 | Diag(Compound->getRBracLoc(), diag::err_maybe_falloff_nonvoid_block); |
| 1212 | break; |
| 1213 | case AlwaysFallThrough: |
| 1214 | if (HasNoReturn) |
| 1215 | Diag(Compound->getRBracLoc(), diag::err_noreturn_block_has_return_expr); |
| 1216 | else if (!ReturnsVoid) |
| 1217 | Diag(Compound->getRBracLoc(), diag::err_falloff_nonvoid_block); |
| 1218 | break; |
| 1219 | case NeverFallThrough: |
Mike Stump | 4d9d51a | 2009-07-28 23:11:12 +0000 | [diff] [blame] | 1220 | if (ReturnsVoid) |
| 1221 | Diag(Compound->getLBracLoc(), diag::warn_suggest_noreturn_block); |
Mike Stump | 5692586 | 2009-07-28 22:04:01 +0000 | [diff] [blame] | 1222 | break; |
| 1223 | } |
| 1224 | } |
| 1225 | } |
| 1226 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 1227 | /// CheckParmsForFunctionDef - Check that the parameters of the given |
| 1228 | /// function are appropriate for the definition of a function. This |
| 1229 | /// takes care of any checks that cannot be performed on the |
| 1230 | /// declaration itself, e.g., that the types of each of the function |
| 1231 | /// parameters are complete. |
| 1232 | bool Sema::CheckParmsForFunctionDef(FunctionDecl *FD) { |
| 1233 | bool HasInvalidParm = false; |
| 1234 | for (unsigned p = 0, NumParams = FD->getNumParams(); p < NumParams; ++p) { |
| 1235 | ParmVarDecl *Param = FD->getParamDecl(p); |
| 1236 | |
| 1237 | // C99 6.7.5.3p4: the parameters in a parameter type list in a |
| 1238 | // function declarator that is part of a function definition of |
| 1239 | // that function shall not have incomplete type. |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 1240 | // |
| 1241 | // This is also C++ [dcl.fct]p6. |
Douglas Gregor | 4ec339f | 2009-01-19 19:26:10 +0000 | [diff] [blame] | 1242 | if (!Param->isInvalidDecl() && |
Douglas Gregor | 86447ec | 2009-03-09 16:13:40 +0000 | [diff] [blame] | 1243 | RequireCompleteType(Param->getLocation(), Param->getType(), |
Douglas Gregor | 4ec339f | 2009-01-19 19:26:10 +0000 | [diff] [blame] | 1244 | diag::err_typecheck_decl_incomplete_type)) { |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 1245 | Param->setInvalidDecl(); |
| 1246 | HasInvalidParm = true; |
| 1247 | } |
Chris Lattner | 777f07b | 2008-12-17 07:32:46 +0000 | [diff] [blame] | 1248 | |
| 1249 | // C99 6.9.1p5: If the declarator includes a parameter type list, the |
| 1250 | // declaration of each parameter shall include an identifier. |
Douglas Gregor | 450da98 | 2009-02-16 20:58:07 +0000 | [diff] [blame] | 1251 | if (Param->getIdentifier() == 0 && |
| 1252 | !Param->isImplicit() && |
| 1253 | !getLangOptions().CPlusPlus) |
Chris Lattner | 777f07b | 2008-12-17 07:32:46 +0000 | [diff] [blame] | 1254 | Diag(Param->getLocation(), diag::err_parameter_name_omitted); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 1255 | } |
| 1256 | |
| 1257 | return HasInvalidParm; |
| 1258 | } |
| 1259 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1260 | /// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with |
| 1261 | /// no declarator (e.g. "struct foo;") is parsed. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1262 | Sema::DeclPtrTy Sema::ParsedFreeStandingDeclSpec(Scope *S, DeclSpec &DS) { |
Eli Friedman | d296836 | 2009-04-09 21:26:42 +0000 | [diff] [blame] | 1263 | // FIXME: Error on auto/register at file scope |
| 1264 | // FIXME: Error on inline/virtual/explicit |
| 1265 | // FIXME: Error on invalid restrict |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 1266 | // FIXME: Warn on useless __thread |
Eli Friedman | d296836 | 2009-04-09 21:26:42 +0000 | [diff] [blame] | 1267 | // FIXME: Warn on useless const/volatile |
| 1268 | // FIXME: Warn on useless static/extern/typedef/private_extern/mutable |
| 1269 | // FIXME: Warn on useless attributes |
Douglas Gregor | 1a51b4a | 2009-02-09 15:09:02 +0000 | [diff] [blame] | 1270 | TagDecl *Tag = 0; |
| 1271 | if (DS.getTypeSpecType() == DeclSpec::TST_class || |
| 1272 | DS.getTypeSpecType() == DeclSpec::TST_struct || |
| 1273 | DS.getTypeSpecType() == DeclSpec::TST_union || |
Douglas Gregor | 4d9a16f | 2009-05-12 23:25:50 +0000 | [diff] [blame] | 1274 | DS.getTypeSpecType() == DeclSpec::TST_enum) { |
| 1275 | if (!DS.getTypeRep()) // We probably had an error |
| 1276 | return DeclPtrTy(); |
| 1277 | |
John McCall | 67d1a67 | 2009-08-06 02:15:43 +0000 | [diff] [blame] | 1278 | // Note that the above type specs guarantee that the |
| 1279 | // type rep is a Decl, whereas in many of the others |
| 1280 | // it's a Type. |
Douglas Gregor | 1a51b4a | 2009-02-09 15:09:02 +0000 | [diff] [blame] | 1281 | Tag = dyn_cast<TagDecl>(static_cast<Decl *>(DS.getTypeRep())); |
Douglas Gregor | 4d9a16f | 2009-05-12 23:25:50 +0000 | [diff] [blame] | 1282 | } |
Douglas Gregor | 1a51b4a | 2009-02-09 15:09:02 +0000 | [diff] [blame] | 1283 | |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 1284 | if (RecordDecl *Record = dyn_cast_or_null<RecordDecl>(Tag)) { |
| 1285 | if (!Record->getDeclName() && Record->isDefinition() && |
Douglas Gregor | a71c129 | 2009-03-06 23:06:59 +0000 | [diff] [blame] | 1286 | DS.getStorageClassSpec() != DeclSpec::SCS_typedef) { |
| 1287 | if (getLangOptions().CPlusPlus || |
| 1288 | Record->getDeclContext()->isRecord()) |
| 1289 | return BuildAnonymousStructOrUnion(S, DS, Record); |
| 1290 | |
| 1291 | Diag(DS.getSourceRange().getBegin(), diag::err_no_declarators) |
| 1292 | << DS.getSourceRange(); |
| 1293 | } |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 1294 | |
| 1295 | // Microsoft allows unnamed struct/union fields. Don't complain |
| 1296 | // about them. |
| 1297 | // FIXME: Should we support Microsoft's extensions in this area? |
| 1298 | if (Record->getDeclName() && getLangOptions().Microsoft) |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1299 | return DeclPtrTy::make(Tag); |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 1300 | } |
| 1301 | |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 1302 | if (!DS.isMissingDeclaratorOk() && |
| 1303 | DS.getTypeSpecType() != DeclSpec::TST_error) { |
Douglas Gregor | 21282df | 2009-01-22 16:23:54 +0000 | [diff] [blame] | 1304 | // Warn about typedefs of enums without names, since this is an |
| 1305 | // extension in both Microsoft an GNU. |
Douglas Gregor | 8158f69 | 2009-01-17 02:55:50 +0000 | [diff] [blame] | 1306 | if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef && |
| 1307 | Tag && isa<EnumDecl>(Tag)) { |
Douglas Gregor | 21282df | 2009-01-22 16:23:54 +0000 | [diff] [blame] | 1308 | Diag(DS.getSourceRange().getBegin(), diag::ext_typedef_without_a_name) |
Douglas Gregor | ee159c1 | 2009-01-13 23:10:51 +0000 | [diff] [blame] | 1309 | << DS.getSourceRange(); |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1310 | return DeclPtrTy::make(Tag); |
Douglas Gregor | ee159c1 | 2009-01-13 23:10:51 +0000 | [diff] [blame] | 1311 | } |
| 1312 | |
Sebastian Redl | a4ed0d8 | 2008-12-28 15:28:59 +0000 | [diff] [blame] | 1313 | Diag(DS.getSourceRange().getBegin(), diag::err_no_declarators) |
| 1314 | << DS.getSourceRange(); |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1315 | return DeclPtrTy(); |
Sebastian Redl | a4ed0d8 | 2008-12-28 15:28:59 +0000 | [diff] [blame] | 1316 | } |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1317 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1318 | return DeclPtrTy::make(Tag); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1319 | } |
| 1320 | |
| 1321 | /// InjectAnonymousStructOrUnionMembers - Inject the members of the |
| 1322 | /// anonymous struct or union AnonRecord into the owning context Owner |
| 1323 | /// and scope S. This routine will be invoked just after we realize |
| 1324 | /// that an unnamed union or struct is actually an anonymous union or |
| 1325 | /// struct, e.g., |
| 1326 | /// |
| 1327 | /// @code |
| 1328 | /// union { |
| 1329 | /// int i; |
| 1330 | /// float f; |
| 1331 | /// }; // InjectAnonymousStructOrUnionMembers called here to inject i and |
| 1332 | /// // f into the surrounding scope.x |
| 1333 | /// @endcode |
| 1334 | /// |
| 1335 | /// This routine is recursive, injecting the names of nested anonymous |
| 1336 | /// structs/unions into the owning context and scope as well. |
| 1337 | bool Sema::InjectAnonymousStructOrUnionMembers(Scope *S, DeclContext *Owner, |
| 1338 | RecordDecl *AnonRecord) { |
| 1339 | bool Invalid = false; |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1340 | for (RecordDecl::field_iterator F = AnonRecord->field_begin(), |
| 1341 | FEnd = AnonRecord->field_end(); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1342 | F != FEnd; ++F) { |
| 1343 | if ((*F)->getDeclName()) { |
Douglas Gregor | 47b9a1c | 2009-02-04 17:27:36 +0000 | [diff] [blame] | 1344 | NamedDecl *PrevDecl = LookupQualifiedName(Owner, (*F)->getDeclName(), |
| 1345 | LookupOrdinaryName, true); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1346 | if (PrevDecl && !isa<TagDecl>(PrevDecl)) { |
| 1347 | // C++ [class.union]p2: |
| 1348 | // The names of the members of an anonymous union shall be |
| 1349 | // distinct from the names of any other entity in the |
| 1350 | // scope in which the anonymous union is declared. |
| 1351 | unsigned diagKind |
| 1352 | = AnonRecord->isUnion()? diag::err_anonymous_union_member_redecl |
| 1353 | : diag::err_anonymous_struct_member_redecl; |
| 1354 | Diag((*F)->getLocation(), diagKind) |
| 1355 | << (*F)->getDeclName(); |
| 1356 | Diag(PrevDecl->getLocation(), diag::note_previous_declaration); |
| 1357 | Invalid = true; |
| 1358 | } else { |
| 1359 | // C++ [class.union]p2: |
| 1360 | // For the purpose of name lookup, after the anonymous union |
| 1361 | // definition, the members of the anonymous union are |
| 1362 | // considered to have been defined in the scope in which the |
| 1363 | // anonymous union is declared. |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1364 | Owner->makeDeclVisibleInContext(*F); |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1365 | S->AddDecl(DeclPtrTy::make(*F)); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1366 | IdResolver.AddDecl(*F); |
| 1367 | } |
| 1368 | } else if (const RecordType *InnerRecordType |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 1369 | = (*F)->getType()->getAs<RecordType>()) { |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1370 | RecordDecl *InnerRecord = InnerRecordType->getDecl(); |
| 1371 | if (InnerRecord->isAnonymousStructOrUnion()) |
| 1372 | Invalid = Invalid || |
| 1373 | InjectAnonymousStructOrUnionMembers(S, Owner, InnerRecord); |
| 1374 | } |
| 1375 | } |
| 1376 | |
| 1377 | return Invalid; |
| 1378 | } |
| 1379 | |
| 1380 | /// ActOnAnonymousStructOrUnion - Handle the declaration of an |
| 1381 | /// anonymous structure or union. Anonymous unions are a C++ feature |
| 1382 | /// (C++ [class.union]) and a GNU C extension; anonymous structures |
| 1383 | /// are a GNU C and GNU C++ extension. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1384 | Sema::DeclPtrTy Sema::BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, |
| 1385 | RecordDecl *Record) { |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1386 | DeclContext *Owner = Record->getDeclContext(); |
| 1387 | |
| 1388 | // Diagnose whether this anonymous struct/union is an extension. |
| 1389 | if (Record->isUnion() && !getLangOptions().CPlusPlus) |
| 1390 | Diag(Record->getLocation(), diag::ext_anonymous_union); |
| 1391 | else if (!Record->isUnion()) |
| 1392 | Diag(Record->getLocation(), diag::ext_anonymous_struct); |
| 1393 | |
| 1394 | // C and C++ require different kinds of checks for anonymous |
| 1395 | // structs/unions. |
| 1396 | bool Invalid = false; |
| 1397 | if (getLangOptions().CPlusPlus) { |
| 1398 | const char* PrevSpec = 0; |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 1399 | unsigned DiagID; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1400 | // C++ [class.union]p3: |
| 1401 | // Anonymous unions declared in a named namespace or in the |
| 1402 | // global namespace shall be declared static. |
| 1403 | if (DS.getStorageClassSpec() != DeclSpec::SCS_static && |
| 1404 | (isa<TranslationUnitDecl>(Owner) || |
| 1405 | (isa<NamespaceDecl>(Owner) && |
| 1406 | cast<NamespaceDecl>(Owner)->getDeclName()))) { |
| 1407 | Diag(Record->getLocation(), diag::err_anonymous_union_not_static); |
| 1408 | Invalid = true; |
| 1409 | |
| 1410 | // Recover by adding 'static'. |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 1411 | DS.SetStorageClassSpec(DeclSpec::SCS_static, SourceLocation(), |
| 1412 | PrevSpec, DiagID); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1413 | } |
| 1414 | // C++ [class.union]p3: |
| 1415 | // A storage class is not allowed in a declaration of an |
| 1416 | // anonymous union in a class scope. |
| 1417 | else if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified && |
| 1418 | isa<RecordDecl>(Owner)) { |
| 1419 | Diag(DS.getStorageClassSpecLoc(), |
| 1420 | diag::err_anonymous_union_with_storage_spec); |
| 1421 | Invalid = true; |
| 1422 | |
| 1423 | // Recover by removing the storage specifier. |
| 1424 | DS.SetStorageClassSpec(DeclSpec::SCS_unspecified, SourceLocation(), |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 1425 | PrevSpec, DiagID); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1426 | } |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 1427 | |
| 1428 | // C++ [class.union]p2: |
| 1429 | // The member-specification of an anonymous union shall only |
| 1430 | // define non-static data members. [Note: nested types and |
| 1431 | // functions cannot be declared within an anonymous union. ] |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1432 | for (DeclContext::decl_iterator Mem = Record->decls_begin(), |
| 1433 | MemEnd = Record->decls_end(); |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 1434 | Mem != MemEnd; ++Mem) { |
| 1435 | if (FieldDecl *FD = dyn_cast<FieldDecl>(*Mem)) { |
| 1436 | // C++ [class.union]p3: |
| 1437 | // An anonymous union shall not have private or protected |
| 1438 | // members (clause 11). |
| 1439 | if (FD->getAccess() == AS_protected || FD->getAccess() == AS_private) { |
| 1440 | Diag(FD->getLocation(), diag::err_anonymous_record_nonpublic_member) |
| 1441 | << (int)Record->isUnion() << (int)(FD->getAccess() == AS_protected); |
| 1442 | Invalid = true; |
| 1443 | } |
| 1444 | } else if ((*Mem)->isImplicit()) { |
| 1445 | // Any implicit members are fine. |
Douglas Gregor | 1931b44 | 2009-02-03 00:34:39 +0000 | [diff] [blame] | 1446 | } else if (isa<TagDecl>(*Mem) && (*Mem)->getDeclContext() != Record) { |
| 1447 | // This is a type that showed up in an |
| 1448 | // elaborated-type-specifier inside the anonymous struct or |
| 1449 | // union, but which actually declares a type outside of the |
| 1450 | // anonymous struct or union. It's okay. |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 1451 | } else if (RecordDecl *MemRecord = dyn_cast<RecordDecl>(*Mem)) { |
| 1452 | if (!MemRecord->isAnonymousStructOrUnion() && |
| 1453 | MemRecord->getDeclName()) { |
| 1454 | // This is a nested type declaration. |
| 1455 | Diag(MemRecord->getLocation(), diag::err_anonymous_record_with_type) |
| 1456 | << (int)Record->isUnion(); |
| 1457 | Invalid = true; |
| 1458 | } |
| 1459 | } else { |
| 1460 | // We have something that isn't a non-static data |
| 1461 | // member. Complain about it. |
| 1462 | unsigned DK = diag::err_anonymous_record_bad_member; |
| 1463 | if (isa<TypeDecl>(*Mem)) |
| 1464 | DK = diag::err_anonymous_record_with_type; |
| 1465 | else if (isa<FunctionDecl>(*Mem)) |
| 1466 | DK = diag::err_anonymous_record_with_function; |
| 1467 | else if (isa<VarDecl>(*Mem)) |
| 1468 | DK = diag::err_anonymous_record_with_static; |
| 1469 | Diag((*Mem)->getLocation(), DK) |
| 1470 | << (int)Record->isUnion(); |
| 1471 | Invalid = true; |
| 1472 | } |
| 1473 | } |
Douglas Gregor | a71c129 | 2009-03-06 23:06:59 +0000 | [diff] [blame] | 1474 | } |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1475 | |
| 1476 | if (!Record->isUnion() && !Owner->isRecord()) { |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 1477 | Diag(Record->getLocation(), diag::err_anonymous_struct_not_member) |
| 1478 | << (int)getLangOptions().CPlusPlus; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1479 | Invalid = true; |
| 1480 | } |
| 1481 | |
| 1482 | // Create a declaration for this anonymous struct/union. |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 1483 | NamedDecl *Anon = 0; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1484 | if (RecordDecl *OwningClass = dyn_cast<RecordDecl>(Owner)) { |
| 1485 | Anon = FieldDecl::Create(Context, OwningClass, Record->getLocation(), |
| 1486 | /*IdentifierInfo=*/0, |
| 1487 | Context.getTypeDeclType(Record), |
Steve Naroff | ea218b8 | 2009-07-14 14:58:18 +0000 | [diff] [blame] | 1488 | /*BitWidth=*/0, /*Mutable=*/false, |
| 1489 | DS.getSourceRange().getBegin()); |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 1490 | Anon->setAccess(AS_public); |
| 1491 | if (getLangOptions().CPlusPlus) |
| 1492 | FieldCollector->Add(cast<FieldDecl>(Anon)); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1493 | } else { |
| 1494 | VarDecl::StorageClass SC; |
| 1495 | switch (DS.getStorageClassSpec()) { |
| 1496 | default: assert(0 && "Unknown storage class!"); |
| 1497 | case DeclSpec::SCS_unspecified: SC = VarDecl::None; break; |
| 1498 | case DeclSpec::SCS_extern: SC = VarDecl::Extern; break; |
| 1499 | case DeclSpec::SCS_static: SC = VarDecl::Static; break; |
| 1500 | case DeclSpec::SCS_auto: SC = VarDecl::Auto; break; |
| 1501 | case DeclSpec::SCS_register: SC = VarDecl::Register; break; |
| 1502 | case DeclSpec::SCS_private_extern: SC = VarDecl::PrivateExtern; break; |
| 1503 | case DeclSpec::SCS_mutable: |
| 1504 | // mutable can only appear on non-static class members, so it's always |
| 1505 | // an error here |
| 1506 | Diag(Record->getLocation(), diag::err_mutable_nonmember); |
| 1507 | Invalid = true; |
| 1508 | SC = VarDecl::None; |
| 1509 | break; |
| 1510 | } |
| 1511 | |
| 1512 | Anon = VarDecl::Create(Context, Owner, Record->getLocation(), |
| 1513 | /*IdentifierInfo=*/0, |
| 1514 | Context.getTypeDeclType(Record), |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 1515 | SC, DS.getSourceRange().getBegin()); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1516 | } |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 1517 | Anon->setImplicit(); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1518 | |
| 1519 | // Add the anonymous struct/union object to the current |
| 1520 | // context. We'll be referencing this object when we refer to one of |
| 1521 | // its members. |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 1522 | Owner->addDecl(Anon); |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1523 | |
| 1524 | // Inject the members of the anonymous struct/union into the owning |
| 1525 | // context and into the identifier resolver chain for name lookup |
| 1526 | // purposes. |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 1527 | if (InjectAnonymousStructOrUnionMembers(S, Owner, Record)) |
| 1528 | Invalid = true; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 1529 | |
| 1530 | // Mark this as an anonymous struct/union type. Note that we do not |
| 1531 | // do this until after we have already checked and injected the |
| 1532 | // members of this anonymous struct/union type, because otherwise |
| 1533 | // the members could be injected twice: once by DeclContext when it |
| 1534 | // builds its lookup table, and once by |
| 1535 | // InjectAnonymousStructOrUnionMembers. |
| 1536 | Record->setAnonymousStructOrUnion(true); |
| 1537 | |
| 1538 | if (Invalid) |
| 1539 | Anon->setInvalidDecl(); |
| 1540 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1541 | return DeclPtrTy::make(Anon); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1542 | } |
| 1543 | |
Steve Naroff | f009063 | 2007-09-02 02:04:30 +0000 | [diff] [blame] | 1544 | |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 1545 | /// GetNameForDeclarator - Determine the full declaration name for the |
| 1546 | /// given Declarator. |
| 1547 | DeclarationName Sema::GetNameForDeclarator(Declarator &D) { |
| 1548 | switch (D.getKind()) { |
| 1549 | case Declarator::DK_Abstract: |
| 1550 | assert(D.getIdentifier() == 0 && "abstract declarators have no name"); |
| 1551 | return DeclarationName(); |
| 1552 | |
| 1553 | case Declarator::DK_Normal: |
| 1554 | assert (D.getIdentifier() != 0 && "normal declarators have an identifier"); |
| 1555 | return DeclarationName(D.getIdentifier()); |
| 1556 | |
| 1557 | case Declarator::DK_Constructor: { |
Douglas Gregor | 1a51b4a | 2009-02-09 15:09:02 +0000 | [diff] [blame] | 1558 | QualType Ty = QualType::getFromOpaquePtr(D.getDeclaratorIdType()); |
Douglas Gregor | 50d62d1 | 2009-08-05 05:36:45 +0000 | [diff] [blame] | 1559 | return Context.DeclarationNames.getCXXConstructorName( |
| 1560 | Context.getCanonicalType(Ty)); |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 1561 | } |
| 1562 | |
| 1563 | case Declarator::DK_Destructor: { |
Douglas Gregor | 1a51b4a | 2009-02-09 15:09:02 +0000 | [diff] [blame] | 1564 | QualType Ty = QualType::getFromOpaquePtr(D.getDeclaratorIdType()); |
Douglas Gregor | 50d62d1 | 2009-08-05 05:36:45 +0000 | [diff] [blame] | 1565 | return Context.DeclarationNames.getCXXDestructorName( |
| 1566 | Context.getCanonicalType(Ty)); |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 1567 | } |
| 1568 | |
| 1569 | case Declarator::DK_Conversion: { |
Douglas Gregor | 1a51b4a | 2009-02-09 15:09:02 +0000 | [diff] [blame] | 1570 | // FIXME: We'd like to keep the non-canonical type for diagnostics! |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 1571 | QualType Ty = QualType::getFromOpaquePtr(D.getDeclaratorIdType()); |
Douglas Gregor | 50d62d1 | 2009-08-05 05:36:45 +0000 | [diff] [blame] | 1572 | return Context.DeclarationNames.getCXXConversionFunctionName( |
| 1573 | Context.getCanonicalType(Ty)); |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 1574 | } |
Douglas Gregor | e94ca9e4 | 2008-11-18 14:39:36 +0000 | [diff] [blame] | 1575 | |
| 1576 | case Declarator::DK_Operator: |
| 1577 | assert(D.getIdentifier() == 0 && "operator names have no identifier"); |
| 1578 | return Context.DeclarationNames.getCXXOperatorName( |
| 1579 | D.getOverloadedOperator()); |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 1580 | } |
| 1581 | |
| 1582 | assert(false && "Unknown name kind"); |
| 1583 | return DeclarationName(); |
| 1584 | } |
| 1585 | |
Douglas Gregor | 4ce205f | 2009-02-06 17:46:57 +0000 | [diff] [blame] | 1586 | /// isNearlyMatchingFunction - Determine whether the C++ functions |
| 1587 | /// Declaration and Definition are "nearly" matching. This heuristic |
| 1588 | /// is used to improve diagnostics in the case where an out-of-line |
| 1589 | /// function definition doesn't match any declaration within |
| 1590 | /// the class or namespace. |
| 1591 | static bool isNearlyMatchingFunction(ASTContext &Context, |
| 1592 | FunctionDecl *Declaration, |
| 1593 | FunctionDecl *Definition) { |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 1594 | if (Declaration->param_size() != Definition->param_size()) |
| 1595 | return false; |
| 1596 | for (unsigned Idx = 0; Idx < Declaration->param_size(); ++Idx) { |
| 1597 | QualType DeclParamTy = Declaration->getParamDecl(Idx)->getType(); |
| 1598 | QualType DefParamTy = Definition->getParamDecl(Idx)->getType(); |
| 1599 | |
| 1600 | DeclParamTy = Context.getCanonicalType(DeclParamTy.getNonReferenceType()); |
| 1601 | DefParamTy = Context.getCanonicalType(DefParamTy.getNonReferenceType()); |
| 1602 | if (DeclParamTy.getUnqualifiedType() != DefParamTy.getUnqualifiedType()) |
| 1603 | return false; |
| 1604 | } |
| 1605 | |
| 1606 | return true; |
| 1607 | } |
| 1608 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1609 | Sema::DeclPtrTy |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 1610 | Sema::HandleDeclarator(Scope *S, Declarator &D, |
| 1611 | MultiTemplateParamsArg TemplateParamLists, |
| 1612 | bool IsFunctionDefinition) { |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 1613 | DeclarationName Name = GetNameForDeclarator(D); |
| 1614 | |
Chris Lattner | e80a59c | 2007-07-25 00:24:17 +0000 | [diff] [blame] | 1615 | // All of these full declarators require an identifier. If it doesn't have |
| 1616 | // one, the ParsedFreeStandingDeclSpec action should be used. |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 1617 | if (!Name) { |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1618 | if (!D.isInvalidType()) // Reject this if we think it is valid. |
Chris Lattner | 1f6f54b | 2008-11-11 06:13:16 +0000 | [diff] [blame] | 1619 | Diag(D.getDeclSpec().getSourceRange().getBegin(), |
Chris Lattner | fa25bbb | 2008-11-19 05:08:23 +0000 | [diff] [blame] | 1620 | diag::err_declarator_need_ident) |
| 1621 | << D.getDeclSpec().getSourceRange() << D.getSourceRange(); |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1622 | return DeclPtrTy(); |
Chris Lattner | e80a59c | 2007-07-25 00:24:17 +0000 | [diff] [blame] | 1623 | } |
| 1624 | |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 1625 | // The scope passed in may not be a decl scope. Zip up the scope tree until |
| 1626 | // we find one that is. |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 1627 | while ((S->getFlags() & Scope::DeclScope) == 0 || |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 1628 | (S->getFlags() & Scope::TemplateParamScope) != 0) |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 1629 | S = S->getParent(); |
| 1630 | |
Douglas Gregor | 4a959d8 | 2009-08-06 16:20:37 +0000 | [diff] [blame] | 1631 | // If this is an out-of-line definition of a member of a class template |
| 1632 | // or class template partial specialization, we may need to rebuild the |
| 1633 | // type specifier in the declarator. See RebuildTypeInCurrentInstantiation() |
| 1634 | // for more information. |
| 1635 | // FIXME: cope with decltype(expr) and typeof(expr) once the rebuilder can |
| 1636 | // handle expressions properly. |
| 1637 | DeclSpec &DS = const_cast<DeclSpec&>(D.getDeclSpec()); |
| 1638 | if (D.getCXXScopeSpec().isSet() && !D.getCXXScopeSpec().isInvalid() && |
| 1639 | isDependentScopeSpecifier(D.getCXXScopeSpec()) && |
| 1640 | (DS.getTypeSpecType() == DeclSpec::TST_typename || |
| 1641 | DS.getTypeSpecType() == DeclSpec::TST_typeofType || |
| 1642 | DS.getTypeSpecType() == DeclSpec::TST_typeofExpr || |
| 1643 | DS.getTypeSpecType() == DeclSpec::TST_decltype)) { |
| 1644 | if (DeclContext *DC = computeDeclContext(D.getCXXScopeSpec(), true)) { |
| 1645 | QualType T = QualType::getFromOpaquePtr(DS.getTypeRep()); |
| 1646 | EnterDeclaratorContext(S, DC); |
| 1647 | T = RebuildTypeInCurrentInstantiation(T, D.getIdentifierLoc(), Name); |
| 1648 | ExitDeclaratorContext(S); |
| 1649 | if (T.isNull()) |
| 1650 | return DeclPtrTy(); |
| 1651 | DS.UpdateTypeRep(T.getAsOpaquePtr()); |
| 1652 | } |
| 1653 | } |
| 1654 | |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 1655 | DeclContext *DC; |
Douglas Gregor | 47b9a1c | 2009-02-04 17:27:36 +0000 | [diff] [blame] | 1656 | NamedDecl *PrevDecl; |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 1657 | NamedDecl *New; |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1658 | |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 1659 | QualType R = GetTypeForDeclarator(D, S); |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 1660 | |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 1661 | // 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] | 1662 | if (D.getCXXScopeSpec().isInvalid()) { |
| 1663 | DC = CurContext; |
| 1664 | PrevDecl = 0; |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1665 | D.setInvalidType(); |
Douglas Gregor | 9fa14a5 | 2009-03-06 19:06:37 +0000 | [diff] [blame] | 1666 | } else if (!D.getCXXScopeSpec().isSet()) { |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 1667 | LookupNameKind NameKind = LookupOrdinaryName; |
| 1668 | |
| 1669 | // If the declaration we're planning to build will be a function |
| 1670 | // or object with linkage, then look for another declaration with |
| 1671 | // linkage (C99 6.2.2p4-5 and C++ [basic.link]p6). |
| 1672 | if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) |
| 1673 | /* Do nothing*/; |
| 1674 | else if (R->isFunctionType()) { |
Douglas Gregor | 6bec78d | 2009-07-07 17:00:05 +0000 | [diff] [blame] | 1675 | if (CurContext->isFunctionOrMethod() || |
| 1676 | D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_static) |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 1677 | NameKind = LookupRedeclarationWithLinkage; |
| 1678 | } else if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_extern) |
| 1679 | NameKind = LookupRedeclarationWithLinkage; |
Douglas Gregor | 6bec78d | 2009-07-07 17:00:05 +0000 | [diff] [blame] | 1680 | else if (CurContext->getLookupContext()->isTranslationUnit() && |
| 1681 | D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_static) |
| 1682 | NameKind = LookupRedeclarationWithLinkage; |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 1683 | |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 1684 | DC = CurContext; |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 1685 | PrevDecl = LookupName(S, Name, NameKind, true, |
Douglas Gregor | 6bec78d | 2009-07-07 17:00:05 +0000 | [diff] [blame] | 1686 | NameKind == LookupRedeclarationWithLinkage, |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1687 | D.getIdentifierLoc()); |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 1688 | } else { // Something like "int foo::x;" |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 1689 | DC = computeDeclContext(D.getCXXScopeSpec(), true); |
Douglas Gregor | 4fdf1fa | 2009-03-11 16:48:53 +0000 | [diff] [blame] | 1690 | // FIXME: RequireCompleteDeclContext(D.getCXXScopeSpec()); ? |
Douglas Gregor | 3e41d60 | 2009-02-13 23:20:09 +0000 | [diff] [blame] | 1691 | PrevDecl = LookupQualifiedName(DC, Name, LookupOrdinaryName, true); |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 1692 | |
| 1693 | // C++ 7.3.1.2p2: |
| 1694 | // Members (including explicit specializations of templates) of a named |
| 1695 | // namespace can also be defined outside that namespace by explicit |
| 1696 | // qualification of the name being defined, provided that the entity being |
| 1697 | // defined was already declared in the namespace and the definition appears |
| 1698 | // after the point of declaration in a namespace that encloses the |
| 1699 | // declarations namespace. |
| 1700 | // |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 1701 | // Note that we only check the context at this point. We don't yet |
| 1702 | // have enough information to make sure that PrevDecl is actually |
| 1703 | // the declaration we want to match. For example, given: |
| 1704 | // |
Douglas Gregor | 9d35097 | 2008-12-12 08:25:50 +0000 | [diff] [blame] | 1705 | // class X { |
| 1706 | // void f(); |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 1707 | // void f(float); |
Douglas Gregor | 9d35097 | 2008-12-12 08:25:50 +0000 | [diff] [blame] | 1708 | // }; |
| 1709 | // |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 1710 | // void X::f(int) { } // ill-formed |
| 1711 | // |
| 1712 | // In this case, PrevDecl will point to the overload set |
| 1713 | // containing the two f's declared in X, but neither of them |
| 1714 | // matches. |
Douglas Gregor | 4ce205f | 2009-02-06 17:46:57 +0000 | [diff] [blame] | 1715 | |
| 1716 | // First check whether we named the global scope. |
| 1717 | if (isa<TranslationUnitDecl>(DC)) { |
| 1718 | Diag(D.getIdentifierLoc(), diag::err_invalid_declarator_global_scope) |
| 1719 | << Name << D.getCXXScopeSpec().getRange(); |
| 1720 | } else if (!CurContext->Encloses(DC)) { |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 1721 | // The qualifying scope doesn't enclose the original declaration. |
| 1722 | // Emit diagnostic based on current scope. |
| 1723 | SourceLocation L = D.getIdentifierLoc(); |
| 1724 | SourceRange R = D.getCXXScopeSpec().getRange(); |
Douglas Gregor | 4ce205f | 2009-02-06 17:46:57 +0000 | [diff] [blame] | 1725 | if (isa<FunctionDecl>(CurContext)) |
Chris Lattner | 011bb4e | 2008-11-23 20:28:15 +0000 | [diff] [blame] | 1726 | Diag(L, diag::err_invalid_declarator_in_function) << Name << R; |
Douglas Gregor | 4ce205f | 2009-02-06 17:46:57 +0000 | [diff] [blame] | 1727 | else |
Chris Lattner | 011bb4e | 2008-11-23 20:28:15 +0000 | [diff] [blame] | 1728 | Diag(L, diag::err_invalid_declarator_scope) |
Douglas Gregor | 4ce205f | 2009-02-06 17:46:57 +0000 | [diff] [blame] | 1729 | << Name << cast<NamedDecl>(DC) << R; |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1730 | D.setInvalidType(); |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 1731 | } |
| 1732 | } |
| 1733 | |
Douglas Gregor | f57172b | 2008-12-08 18:40:42 +0000 | [diff] [blame] | 1734 | if (PrevDecl && PrevDecl->isTemplateParameter()) { |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 1735 | // Maybe we will complain about the shadowed template parameter. |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1736 | if (!D.isInvalidType()) |
| 1737 | if (DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl)) |
| 1738 | D.setInvalidType(); |
| 1739 | |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 1740 | // Just pretend that we didn't see the previous declaration. |
| 1741 | PrevDecl = 0; |
| 1742 | } |
| 1743 | |
Douglas Gregor | 2ce52f3 | 2008-04-13 21:07:44 +0000 | [diff] [blame] | 1744 | // In C++, the previous declaration we find might be a tag type |
| 1745 | // (class or enum). In this case, the new declaration will hide the |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 1746 | // tag type. Note that this does does not apply if we're declaring a |
| 1747 | // typedef (C++ [dcl.typedef]p4). |
| 1748 | if (PrevDecl && PrevDecl->getIdentifierNamespace() == Decl::IDNS_Tag && |
| 1749 | D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef) |
Douglas Gregor | 2ce52f3 | 2008-04-13 21:07:44 +0000 | [diff] [blame] | 1750 | PrevDecl = 0; |
| 1751 | |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1752 | bool Redeclaration = false; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1753 | if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) { |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 1754 | if (TemplateParamLists.size()) { |
| 1755 | Diag(D.getIdentifierLoc(), diag::err_template_typedef); |
| 1756 | return DeclPtrTy(); |
| 1757 | } |
| 1758 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1759 | New = ActOnTypedefDeclarator(S, D, DC, R, PrevDecl, Redeclaration); |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 1760 | } else if (R->isFunctionType()) { |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 1761 | New = ActOnFunctionDeclarator(S, D, DC, R, PrevDecl, |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 1762 | move(TemplateParamLists), |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1763 | IsFunctionDefinition, Redeclaration); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1764 | } else { |
Douglas Gregor | dfe3f2d | 2009-07-22 17:18:37 +0000 | [diff] [blame] | 1765 | New = ActOnVariableDeclarator(S, D, DC, R, PrevDecl, |
| 1766 | move(TemplateParamLists), |
| 1767 | Redeclaration); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1768 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 1769 | |
| 1770 | if (New == 0) |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1771 | return DeclPtrTy(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1772 | |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1773 | // If this has an identifier and is not an invalid redeclaration, |
| 1774 | // add it to the scope stack. |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1775 | if (Name && !(Redeclaration && New->isInvalidDecl())) |
Argyrios Kyrtzidis | 87f3ff0 | 2008-04-12 00:47:19 +0000 | [diff] [blame] | 1776 | PushOnScopeChains(New, S); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1777 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1778 | return DeclPtrTy::make(New); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1779 | } |
| 1780 | |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 1781 | /// TryToFixInvalidVariablyModifiedType - Helper method to turn variable array |
| 1782 | /// types into constant array types in certain situations which would otherwise |
| 1783 | /// be errors (for GCC compatibility). |
| 1784 | static QualType TryToFixInvalidVariablyModifiedType(QualType T, |
| 1785 | ASTContext &Context, |
| 1786 | bool &SizeIsNegative) { |
| 1787 | // This method tries to turn a variable array into a constant |
| 1788 | // array even when the size isn't an ICE. This is necessary |
| 1789 | // for compatibility with code that depends on gcc's buggy |
| 1790 | // constant expression folding, like struct {char x[(int)(char*)2];} |
| 1791 | SizeIsNegative = false; |
| 1792 | |
| 1793 | if (const PointerType* PTy = dyn_cast<PointerType>(T)) { |
| 1794 | QualType Pointee = PTy->getPointeeType(); |
| 1795 | QualType FixedType = |
| 1796 | TryToFixInvalidVariablyModifiedType(Pointee, Context, SizeIsNegative); |
| 1797 | if (FixedType.isNull()) return FixedType; |
Eli Friedman | 61125c8 | 2009-02-21 00:58:02 +0000 | [diff] [blame] | 1798 | FixedType = Context.getPointerType(FixedType); |
| 1799 | FixedType.setCVRQualifiers(T.getCVRQualifiers()); |
| 1800 | return FixedType; |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 1801 | } |
| 1802 | |
| 1803 | const VariableArrayType* VLATy = dyn_cast<VariableArrayType>(T); |
Eli Friedman | bc592e6 | 2009-02-26 03:58:54 +0000 | [diff] [blame] | 1804 | if (!VLATy) |
| 1805 | return QualType(); |
| 1806 | // FIXME: We should probably handle this case |
| 1807 | if (VLATy->getElementType()->isVariablyModifiedType()) |
| 1808 | return QualType(); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 1809 | |
| 1810 | Expr::EvalResult EvalResult; |
| 1811 | if (!VLATy->getSizeExpr() || |
Eli Friedman | bc592e6 | 2009-02-26 03:58:54 +0000 | [diff] [blame] | 1812 | !VLATy->getSizeExpr()->Evaluate(EvalResult, Context) || |
| 1813 | !EvalResult.Val.isInt()) |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 1814 | return QualType(); |
Eli Friedman | bc592e6 | 2009-02-26 03:58:54 +0000 | [diff] [blame] | 1815 | |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 1816 | llvm::APSInt &Res = EvalResult.Val.getInt(); |
Douglas Gregor | 7e7eb3d | 2009-07-06 15:59:29 +0000 | [diff] [blame] | 1817 | if (Res >= llvm::APSInt(Res.getBitWidth(), Res.isUnsigned())) { |
| 1818 | Expr* ArySizeExpr = VLATy->getSizeExpr(); |
| 1819 | // FIXME: here we could "steal" (how?) ArySizeExpr from the VLA, |
| 1820 | // so as to transfer ownership to the ConstantArrayWithExpr. |
| 1821 | // Alternatively, we could "clone" it (how?). |
| 1822 | // Since we don't know how to do things above, we just use the |
| 1823 | // very same Expr*. |
| 1824 | return Context.getConstantArrayWithExprType(VLATy->getElementType(), |
| 1825 | Res, ArySizeExpr, |
| 1826 | ArrayType::Normal, 0, |
| 1827 | VLATy->getBracketsRange()); |
| 1828 | } |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 1829 | |
| 1830 | SizeIsNegative = true; |
| 1831 | return QualType(); |
| 1832 | } |
| 1833 | |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 1834 | /// \brief Register the given locally-scoped external C declaration so |
| 1835 | /// that it can be found later for redeclarations |
| 1836 | void |
| 1837 | Sema::RegisterLocallyScopedExternCDecl(NamedDecl *ND, NamedDecl *PrevDecl, |
| 1838 | Scope *S) { |
| 1839 | assert(ND->getLexicalDeclContext()->isFunctionOrMethod() && |
| 1840 | "Decl is not a locally-scoped decl!"); |
| 1841 | // Note that we have a locally-scoped external with this name. |
| 1842 | LocallyScopedExternalDecls[ND->getDeclName()] = ND; |
| 1843 | |
| 1844 | if (!PrevDecl) |
| 1845 | return; |
| 1846 | |
| 1847 | // If there was a previous declaration of this variable, it may be |
| 1848 | // in our identifier chain. Update the identifier chain with the new |
| 1849 | // declaration. |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 1850 | if (S && IdResolver.ReplaceDecl(PrevDecl, ND)) { |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 1851 | // The previous declaration was found on the identifer resolver |
| 1852 | // chain, so remove it from its scope. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1853 | while (S && !S->isDeclScope(DeclPtrTy::make(PrevDecl))) |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 1854 | S = S->getParent(); |
| 1855 | |
| 1856 | if (S) |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 1857 | S->RemoveDecl(DeclPtrTy::make(PrevDecl)); |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 1858 | } |
| 1859 | } |
| 1860 | |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 1861 | /// \brief Diagnose function specifiers on a declaration of an identifier that |
| 1862 | /// does not identify a function. |
| 1863 | void Sema::DiagnoseFunctionSpecifiers(Declarator& D) { |
| 1864 | // FIXME: We should probably indicate the identifier in question to avoid |
| 1865 | // confusion for constructs like "inline int a(), b;" |
| 1866 | if (D.getDeclSpec().isInlineSpecified()) |
| 1867 | Diag(D.getDeclSpec().getInlineSpecLoc(), |
| 1868 | diag::err_inline_non_function); |
| 1869 | |
| 1870 | if (D.getDeclSpec().isVirtualSpecified()) |
| 1871 | Diag(D.getDeclSpec().getVirtualSpecLoc(), |
| 1872 | diag::err_virtual_non_function); |
| 1873 | |
| 1874 | if (D.getDeclSpec().isExplicitSpecified()) |
| 1875 | Diag(D.getDeclSpec().getExplicitSpecLoc(), |
| 1876 | diag::err_explicit_non_function); |
| 1877 | } |
| 1878 | |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 1879 | NamedDecl* |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 1880 | Sema::ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1881 | QualType R, Decl* PrevDecl, bool &Redeclaration) { |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 1882 | // Typedef declarators cannot be qualified (C++ [dcl.meaning]p1). |
| 1883 | if (D.getCXXScopeSpec().isSet()) { |
| 1884 | Diag(D.getIdentifierLoc(), diag::err_qualified_typedef_declarator) |
| 1885 | << D.getCXXScopeSpec().getRange(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1886 | D.setInvalidType(); |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 1887 | // Pretend we didn't see the scope specifier. |
| 1888 | DC = 0; |
| 1889 | } |
| 1890 | |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 1891 | if (getLangOptions().CPlusPlus) { |
| 1892 | // Check that there are no default arguments (C++ only). |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 1893 | CheckExtraCXXDefaultArguments(D); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 1894 | } |
| 1895 | |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 1896 | DiagnoseFunctionSpecifiers(D); |
| 1897 | |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 1898 | if (D.getDeclSpec().isThreadSpecified()) |
| 1899 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_invalid_thread); |
| 1900 | |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 1901 | TypedefDecl *NewTD = ParseTypedefDecl(S, D, R); |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 1902 | if (!NewTD) return 0; |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1903 | |
| 1904 | if (D.isInvalidType()) |
| 1905 | NewTD->setInvalidDecl(); |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 1906 | |
| 1907 | // Handle attributes prior to checking for duplicates in MergeVarDecl |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 1908 | ProcessDeclAttributes(S, NewTD, D); |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 1909 | // Merge the decl with the existing one if appropriate. If the decl is |
| 1910 | // in an outer scope, it isn't the same thing. |
| 1911 | if (PrevDecl && isDeclInScope(PrevDecl, DC, S)) { |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 1912 | Redeclaration = true; |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1913 | MergeTypeDefDecl(NewTD, PrevDecl); |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 1914 | } |
| 1915 | |
Chris Lattner | 38c5ebd | 2009-04-19 05:21:20 +0000 | [diff] [blame] | 1916 | // C99 6.7.7p2: If a typedef name specifies a variably modified type |
| 1917 | // then it shall have block scope. |
| 1918 | QualType T = NewTD->getUnderlyingType(); |
| 1919 | if (T->isVariablyModifiedType()) { |
| 1920 | CurFunctionNeedsScopeChecking = true; |
| 1921 | |
| 1922 | if (S->getFnParent() == 0) { |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 1923 | bool SizeIsNegative; |
| 1924 | QualType FixedTy = |
| 1925 | TryToFixInvalidVariablyModifiedType(T, Context, SizeIsNegative); |
| 1926 | if (!FixedTy.isNull()) { |
| 1927 | Diag(D.getIdentifierLoc(), diag::warn_illegal_constant_array_size); |
| 1928 | NewTD->setUnderlyingType(FixedTy); |
| 1929 | } else { |
| 1930 | if (SizeIsNegative) |
| 1931 | Diag(D.getIdentifierLoc(), diag::err_typecheck_negative_array_size); |
| 1932 | else if (T->isVariableArrayType()) |
| 1933 | Diag(D.getIdentifierLoc(), diag::err_vla_decl_in_file_scope); |
| 1934 | else |
| 1935 | Diag(D.getIdentifierLoc(), diag::err_vm_decl_in_file_scope); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1936 | NewTD->setInvalidDecl(); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 1937 | } |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 1938 | } |
| 1939 | } |
Douglas Gregor | c29f77b | 2009-07-07 16:35:42 +0000 | [diff] [blame] | 1940 | |
| 1941 | // If this is the C FILE type, notify the AST context. |
| 1942 | if (IdentifierInfo *II = NewTD->getIdentifier()) |
| 1943 | if (!NewTD->isInvalidDecl() && |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 1944 | NewTD->getDeclContext()->getLookupContext()->isTranslationUnit()) { |
| 1945 | if (II->isStr("FILE")) |
| 1946 | Context.setFILEDecl(NewTD); |
| 1947 | else if (II->isStr("jmp_buf")) |
| 1948 | Context.setjmp_bufDecl(NewTD); |
| 1949 | else if (II->isStr("sigjmp_buf")) |
| 1950 | Context.setsigjmp_bufDecl(NewTD); |
| 1951 | } |
| 1952 | |
Zhongxing Xu | d5ed8c3 | 2009-01-16 03:34:13 +0000 | [diff] [blame] | 1953 | return NewTD; |
| 1954 | } |
| 1955 | |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 1956 | /// \brief Determines whether the given declaration is an out-of-scope |
| 1957 | /// previous declaration. |
| 1958 | /// |
| 1959 | /// This routine should be invoked when name lookup has found a |
| 1960 | /// previous declaration (PrevDecl) that is not in the scope where a |
| 1961 | /// new declaration by the same name is being introduced. If the new |
| 1962 | /// declaration occurs in a local scope, previous declarations with |
| 1963 | /// linkage may still be considered previous declarations (C99 |
| 1964 | /// 6.2.2p4-5, C++ [basic.link]p6). |
| 1965 | /// |
| 1966 | /// \param PrevDecl the previous declaration found by name |
| 1967 | /// lookup |
| 1968 | /// |
| 1969 | /// \param DC the context in which the new declaration is being |
| 1970 | /// declared. |
| 1971 | /// |
| 1972 | /// \returns true if PrevDecl is an out-of-scope previous declaration |
| 1973 | /// for a new delcaration with the same name. |
| 1974 | static bool |
| 1975 | isOutOfScopePreviousDeclaration(NamedDecl *PrevDecl, DeclContext *DC, |
| 1976 | ASTContext &Context) { |
| 1977 | if (!PrevDecl) |
| 1978 | return 0; |
| 1979 | |
| 1980 | // FIXME: PrevDecl could be an OverloadedFunctionDecl, in which |
| 1981 | // case we need to check each of the overloaded functions. |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 1982 | if (!PrevDecl->hasLinkage()) |
| 1983 | return false; |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 1984 | |
| 1985 | if (Context.getLangOptions().CPlusPlus) { |
| 1986 | // C++ [basic.link]p6: |
| 1987 | // If there is a visible declaration of an entity with linkage |
| 1988 | // having the same name and type, ignoring entities declared |
| 1989 | // outside the innermost enclosing namespace scope, the block |
| 1990 | // scope declaration declares that same entity and receives the |
| 1991 | // linkage of the previous declaration. |
| 1992 | DeclContext *OuterContext = DC->getLookupContext(); |
| 1993 | if (!OuterContext->isFunctionOrMethod()) |
| 1994 | // This rule only applies to block-scope declarations. |
| 1995 | return false; |
| 1996 | else { |
| 1997 | DeclContext *PrevOuterContext = PrevDecl->getDeclContext(); |
| 1998 | if (PrevOuterContext->isRecord()) |
| 1999 | // We found a member function: ignore it. |
| 2000 | return false; |
| 2001 | else { |
| 2002 | // Find the innermost enclosing namespace for the new and |
| 2003 | // previous declarations. |
| 2004 | while (!OuterContext->isFileContext()) |
| 2005 | OuterContext = OuterContext->getParent(); |
| 2006 | while (!PrevOuterContext->isFileContext()) |
| 2007 | PrevOuterContext = PrevOuterContext->getParent(); |
| 2008 | |
| 2009 | // The previous declaration is in a different namespace, so it |
| 2010 | // isn't the same function. |
| 2011 | if (OuterContext->getPrimaryContext() != |
| 2012 | PrevOuterContext->getPrimaryContext()) |
| 2013 | return false; |
| 2014 | } |
| 2015 | } |
| 2016 | } |
| 2017 | |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 2018 | return true; |
| 2019 | } |
| 2020 | |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 2021 | NamedDecl* |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2022 | Sema::ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2023 | QualType R,NamedDecl* PrevDecl, |
Douglas Gregor | dfe3f2d | 2009-07-22 17:18:37 +0000 | [diff] [blame] | 2024 | MultiTemplateParamsArg TemplateParamLists, |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 2025 | bool &Redeclaration) { |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2026 | DeclarationName Name = GetNameForDeclarator(D); |
| 2027 | |
| 2028 | // Check that there are no default arguments (C++ only). |
| 2029 | if (getLangOptions().CPlusPlus) |
| 2030 | CheckExtraCXXDefaultArguments(D); |
| 2031 | |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2032 | VarDecl *NewVD; |
| 2033 | VarDecl::StorageClass SC; |
| 2034 | switch (D.getDeclSpec().getStorageClassSpec()) { |
| 2035 | default: assert(0 && "Unknown storage class!"); |
| 2036 | case DeclSpec::SCS_unspecified: SC = VarDecl::None; break; |
| 2037 | case DeclSpec::SCS_extern: SC = VarDecl::Extern; break; |
| 2038 | case DeclSpec::SCS_static: SC = VarDecl::Static; break; |
| 2039 | case DeclSpec::SCS_auto: SC = VarDecl::Auto; break; |
| 2040 | case DeclSpec::SCS_register: SC = VarDecl::Register; break; |
| 2041 | case DeclSpec::SCS_private_extern: SC = VarDecl::PrivateExtern; break; |
| 2042 | case DeclSpec::SCS_mutable: |
| 2043 | // mutable can only appear on non-static class members, so it's always |
| 2044 | // an error here |
| 2045 | Diag(D.getIdentifierLoc(), diag::err_mutable_nonmember); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2046 | D.setInvalidType(); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2047 | SC = VarDecl::None; |
| 2048 | break; |
| 2049 | } |
| 2050 | |
| 2051 | IdentifierInfo *II = Name.getAsIdentifierInfo(); |
| 2052 | if (!II) { |
| 2053 | Diag(D.getIdentifierLoc(), diag::err_bad_variable_name) |
| 2054 | << Name.getAsString(); |
| 2055 | return 0; |
| 2056 | } |
| 2057 | |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 2058 | DiagnoseFunctionSpecifiers(D); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2059 | |
Douglas Gregor | 2d2e9cf | 2009-03-11 20:22:50 +0000 | [diff] [blame] | 2060 | if (!DC->isRecord() && S->getFnParent() == 0) { |
| 2061 | // C99 6.9p2: The storage-class specifiers auto and register shall not |
| 2062 | // appear in the declaration specifiers in an external declaration. |
| 2063 | if (SC == VarDecl::Auto || SC == VarDecl::Register) { |
Chris Lattner | d4b19d5 | 2009-05-12 21:44:00 +0000 | [diff] [blame] | 2064 | |
| 2065 | // If this is a register variable with an asm label specified, then this |
| 2066 | // is a GNU extension. |
| 2067 | if (SC == VarDecl::Register && D.getAsmLabel()) |
| 2068 | Diag(D.getIdentifierLoc(), diag::err_unsupported_global_register); |
| 2069 | else |
| 2070 | Diag(D.getIdentifierLoc(), diag::err_typecheck_sclass_fscope); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2071 | D.setInvalidType(); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2072 | } |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2073 | } |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 2074 | if (DC->isRecord() && !CurContext->isRecord()) { |
| 2075 | // This is an out-of-line definition of a static data member. |
| 2076 | if (SC == VarDecl::Static) { |
| 2077 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), |
| 2078 | diag::err_static_out_of_line) |
| 2079 | << CodeModificationHint::CreateRemoval( |
| 2080 | SourceRange(D.getDeclSpec().getStorageClassSpecLoc())); |
| 2081 | } else if (SC == VarDecl::None) |
| 2082 | SC = VarDecl::Static; |
| 2083 | } |
Anders Carlsson | e98da2e | 2009-06-24 00:28:53 +0000 | [diff] [blame] | 2084 | if (SC == VarDecl::Static) { |
| 2085 | if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(DC)) { |
| 2086 | if (RD->isLocalClass()) |
| 2087 | Diag(D.getIdentifierLoc(), |
| 2088 | diag::err_static_data_member_not_allowed_in_local_class) |
| 2089 | << Name << RD->getDeclName(); |
| 2090 | } |
| 2091 | } |
| 2092 | |
Douglas Gregor | dfe3f2d | 2009-07-22 17:18:37 +0000 | [diff] [blame] | 2093 | // Check that we can declare a template here. |
| 2094 | if (TemplateParamLists.size() && |
| 2095 | CheckTemplateDeclScope(S, TemplateParamLists)) |
| 2096 | return 0; |
| 2097 | |
| 2098 | // Match up the template parameter lists with the scope specifier, then |
| 2099 | // determine whether we have a template or a template specialization. |
| 2100 | if (TemplateParameterList *TemplateParams |
| 2101 | = MatchTemplateParametersToScopeSpecifier( |
| 2102 | D.getDeclSpec().getSourceRange().getBegin(), |
| 2103 | D.getCXXScopeSpec(), |
Douglas Gregor | 27eeb5e | 2009-07-22 22:05:02 +0000 | [diff] [blame] | 2104 | (TemplateParameterList**)TemplateParamLists.get(), |
Douglas Gregor | dfe3f2d | 2009-07-22 17:18:37 +0000 | [diff] [blame] | 2105 | TemplateParamLists.size())) { |
| 2106 | if (TemplateParams->size() > 0) { |
| 2107 | // There is no such thing as a variable template. |
| 2108 | Diag(D.getIdentifierLoc(), diag::err_template_variable) |
| 2109 | << II |
| 2110 | << SourceRange(TemplateParams->getTemplateLoc(), |
| 2111 | TemplateParams->getRAngleLoc()); |
| 2112 | return 0; |
| 2113 | } else { |
| 2114 | // There is an extraneous 'template<>' for this variable. Complain |
| 2115 | // about it, but allow the declaration of the variable. |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 2116 | Diag(TemplateParams->getTemplateLoc(), |
| 2117 | diag::err_template_variable_noparams) |
Douglas Gregor | dfe3f2d | 2009-07-22 17:18:37 +0000 | [diff] [blame] | 2118 | << II |
| 2119 | << SourceRange(TemplateParams->getTemplateLoc(), |
| 2120 | TemplateParams->getRAngleLoc()); |
| 2121 | } |
| 2122 | } |
| 2123 | |
Douglas Gregor | 2d2e9cf | 2009-03-11 20:22:50 +0000 | [diff] [blame] | 2124 | NewVD = VarDecl::Create(Context, DC, D.getIdentifierLoc(), |
| 2125 | II, R, SC, |
| 2126 | // FIXME: Move to DeclGroup... |
| 2127 | D.getDeclSpec().getSourceRange().getBegin()); |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 2128 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2129 | if (D.isInvalidType()) |
| 2130 | NewVD->setInvalidDecl(); |
| 2131 | |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 2132 | if (D.getDeclSpec().isThreadSpecified()) { |
| 2133 | if (NewVD->hasLocalStorage()) |
| 2134 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_thread_non_global); |
Eli Friedman | 4fb71b0 | 2009-04-19 21:48:33 +0000 | [diff] [blame] | 2135 | else if (!Context.Target.isTLSSupported()) |
| 2136 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_thread_unsupported); |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 2137 | else |
| 2138 | NewVD->setThreadSpecified(true); |
| 2139 | } |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 2140 | |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 2141 | // Set the lexical context. If the declarator has a C++ scope specifier, the |
| 2142 | // lexical context will be different from the semantic context. |
| 2143 | NewVD->setLexicalDeclContext(CurContext); |
| 2144 | |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2145 | // Handle attributes prior to checking for duplicates in MergeVarDecl |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 2146 | ProcessDeclAttributes(S, NewVD, D); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2147 | |
| 2148 | // Handle GNU asm-label extension (encoded as an attribute). |
| 2149 | if (Expr *E = (Expr*) D.getAsmLabel()) { |
| 2150 | // The parser guarantees this is a string. |
| 2151 | StringLiteral *SE = cast<StringLiteral>(E); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 2152 | NewVD->addAttr(::new (Context) AsmLabelAttr(std::string(SE->getStrData(), |
Chris Lattner | 0b2b6e1 | 2009-03-04 06:34:08 +0000 | [diff] [blame] | 2153 | SE->getByteLength()))); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2154 | } |
| 2155 | |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2156 | // If name lookup finds a previous declaration that is not in the |
| 2157 | // same scope as the new declaration, this may still be an |
| 2158 | // acceptable redeclaration. |
| 2159 | if (PrevDecl && !isDeclInScope(PrevDecl, DC, S) && |
| 2160 | !(NewVD->hasLinkage() && |
| 2161 | isOutOfScopePreviousDeclaration(PrevDecl, DC, Context))) |
| 2162 | PrevDecl = 0; |
| 2163 | |
| 2164 | // Merge the decl with the existing one if appropriate. |
| 2165 | if (PrevDecl) { |
| 2166 | if (isa<FieldDecl>(PrevDecl) && D.getCXXScopeSpec().isSet()) { |
| 2167 | // The user tried to define a non-static data member |
| 2168 | // out-of-line (C++ [dcl.meaning]p1). |
| 2169 | Diag(NewVD->getLocation(), diag::err_nonstatic_member_out_of_line) |
| 2170 | << D.getCXXScopeSpec().getRange(); |
| 2171 | PrevDecl = 0; |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2172 | NewVD->setInvalidDecl(); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2173 | } |
| 2174 | } else if (D.getCXXScopeSpec().isSet()) { |
| 2175 | // No previous declaration in the qualifying scope. |
| 2176 | Diag(D.getIdentifierLoc(), diag::err_typecheck_no_member) |
| 2177 | << Name << D.getCXXScopeSpec().getRange(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2178 | NewVD->setInvalidDecl(); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2179 | } |
| 2180 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2181 | CheckVariableDeclaration(NewVD, PrevDecl, Redeclaration); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2182 | |
Ryan Flynn | 478fbc6 | 2009-07-25 22:29:44 +0000 | [diff] [blame] | 2183 | // attributes declared post-definition are currently ignored |
| 2184 | if (PrevDecl) { |
| 2185 | const VarDecl *Def = 0, *PrevVD = dyn_cast<VarDecl>(PrevDecl); |
| 2186 | if (PrevVD->getDefinition(Def) && D.hasAttributes()) { |
| 2187 | Diag(NewVD->getLocation(), diag::warn_attribute_precede_definition); |
| 2188 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 2189 | } |
| 2190 | } |
| 2191 | |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2192 | // If this is a locally-scoped extern C variable, update the map of |
| 2193 | // such variables. |
| 2194 | if (CurContext->isFunctionOrMethod() && NewVD->isExternC(Context) && |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2195 | !NewVD->isInvalidDecl()) |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2196 | RegisterLocallyScopedExternCDecl(NewVD, PrevDecl, S); |
| 2197 | |
| 2198 | return NewVD; |
| 2199 | } |
| 2200 | |
| 2201 | /// \brief Perform semantic checking on a newly-created variable |
| 2202 | /// declaration. |
| 2203 | /// |
| 2204 | /// This routine performs all of the type-checking required for a |
Douglas Gregor | 180bb63 | 2009-05-01 15:47:09 +0000 | [diff] [blame] | 2205 | /// variable declaration once it has been built. It is used both to |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2206 | /// check variables after they have been parsed and their declarators |
Douglas Gregor | 180bb63 | 2009-05-01 15:47:09 +0000 | [diff] [blame] | 2207 | /// have been translated into a declaration, and to check variables |
| 2208 | /// that have been instantiated from a template. |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2209 | /// |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2210 | /// Sets NewVD->isInvalidDecl() if an error was encountered. |
| 2211 | void Sema::CheckVariableDeclaration(VarDecl *NewVD, NamedDecl *PrevDecl, |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2212 | bool &Redeclaration) { |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2213 | // If the decl is already known invalid, don't check it. |
| 2214 | if (NewVD->isInvalidDecl()) |
| 2215 | return; |
| 2216 | |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2217 | QualType T = NewVD->getType(); |
| 2218 | |
| 2219 | if (T->isObjCInterfaceType()) { |
| 2220 | Diag(NewVD->getLocation(), diag::err_statically_allocated_object); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2221 | return NewVD->setInvalidDecl(); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2222 | } |
| 2223 | |
| 2224 | // The variable can not have an abstract class type. |
| 2225 | if (RequireNonAbstractType(NewVD->getLocation(), T, |
| 2226 | diag::err_abstract_type_in_decl, |
| 2227 | AbstractVariableType)) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2228 | return NewVD->setInvalidDecl(); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2229 | |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2230 | // Emit an error if an address space was applied to decl with local storage. |
| 2231 | // This includes arrays of objects with address space qualifiers, but not |
| 2232 | // automatic variables that point to other address spaces. |
| 2233 | // ISO/IEC TR 18037 S5.1.2 |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2234 | if (NewVD->hasLocalStorage() && (T.getAddressSpace() != 0)) { |
| 2235 | Diag(NewVD->getLocation(), diag::err_as_qualified_auto_decl); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2236 | return NewVD->setInvalidDecl(); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2237 | } |
Fariborz Jahanian | 7b5b317 | 2009-02-21 19:44:02 +0000 | [diff] [blame] | 2238 | |
Mike Stump | f33651c | 2009-04-14 00:57:29 +0000 | [diff] [blame] | 2239 | if (NewVD->hasLocalStorage() && T.isObjCGCWeak() |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 2240 | && !NewVD->hasAttr<BlocksAttr>()) |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2241 | Diag(NewVD->getLocation(), diag::warn_attribute_weak_on_local); |
Fariborz Jahanian | 7b5b317 | 2009-02-21 19:44:02 +0000 | [diff] [blame] | 2242 | |
Chris Lattner | 38c5ebd | 2009-04-19 05:21:20 +0000 | [diff] [blame] | 2243 | bool isVM = T->isVariablyModifiedType(); |
Chris Lattner | be6d259 | 2009-07-19 20:17:11 +0000 | [diff] [blame] | 2244 | if (isVM || NewVD->hasAttr<CleanupAttr>() || |
| 2245 | NewVD->hasAttr<BlocksAttr>()) |
Chris Lattner | 38c5ebd | 2009-04-19 05:21:20 +0000 | [diff] [blame] | 2246 | CurFunctionNeedsScopeChecking = true; |
| 2247 | |
| 2248 | if ((isVM && NewVD->hasLinkage()) || |
| 2249 | (T->isVariableArrayType() && NewVD->hasGlobalStorage())) { |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 2250 | bool SizeIsNegative; |
| 2251 | QualType FixedTy = |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2252 | TryToFixInvalidVariablyModifiedType(T, Context, SizeIsNegative); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2253 | |
| 2254 | if (FixedTy.isNull() && T->isVariableArrayType()) { |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2255 | const VariableArrayType *VAT = Context.getAsVariableArrayType(T); |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 2256 | // FIXME: This won't give the correct result for |
| 2257 | // int a[10][n]; |
| 2258 | SourceRange SizeRange = VAT->getSizeExpr()->getSourceRange(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2259 | |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 2260 | if (NewVD->isFileVarDecl()) |
| 2261 | Diag(NewVD->getLocation(), diag::err_vla_decl_in_file_scope) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2262 | << SizeRange; |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 2263 | else if (NewVD->getStorageClass() == VarDecl::Static) |
| 2264 | Diag(NewVD->getLocation(), diag::err_vla_decl_has_static_storage) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2265 | << SizeRange; |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 2266 | else |
| 2267 | Diag(NewVD->getLocation(), diag::err_vla_decl_has_extern_linkage) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2268 | << SizeRange; |
| 2269 | return NewVD->setInvalidDecl(); |
| 2270 | } |
| 2271 | |
| 2272 | if (FixedTy.isNull()) { |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 2273 | if (NewVD->isFileVarDecl()) |
| 2274 | Diag(NewVD->getLocation(), diag::err_vm_decl_in_file_scope); |
| 2275 | else |
| 2276 | Diag(NewVD->getLocation(), diag::err_vm_decl_has_extern_linkage); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2277 | return NewVD->setInvalidDecl(); |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 2278 | } |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2279 | |
| 2280 | Diag(NewVD->getLocation(), diag::warn_illegal_constant_array_size); |
| 2281 | NewVD->setType(FixedTy); |
Anders Carlsson | 1a7acfa | 2009-02-28 21:56:50 +0000 | [diff] [blame] | 2282 | } |
| 2283 | |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 2284 | if (!PrevDecl && NewVD->isExternC(Context)) { |
| 2285 | // Since we did not find anything by this name and we're declaring |
| 2286 | // an extern "C" variable, look for a non-visible extern "C" |
| 2287 | // declaration with the same name. |
| 2288 | llvm::DenseMap<DeclarationName, NamedDecl *>::iterator Pos |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2289 | = LocallyScopedExternalDecls.find(NewVD->getDeclName()); |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 2290 | if (Pos != LocallyScopedExternalDecls.end()) |
| 2291 | PrevDecl = Pos->second; |
| 2292 | } |
| 2293 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2294 | if (T->isVoidType() && !NewVD->hasExternalStorage()) { |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2295 | Diag(NewVD->getLocation(), diag::err_typecheck_decl_incomplete_type) |
| 2296 | << T; |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2297 | return NewVD->setInvalidDecl(); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2298 | } |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2299 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 2300 | if (!NewVD->hasLocalStorage() && NewVD->hasAttr<BlocksAttr>()) { |
Mike Stump | ea000bf | 2009-04-30 00:19:40 +0000 | [diff] [blame] | 2301 | Diag(NewVD->getLocation(), diag::err_block_on_nonlocal); |
| 2302 | return NewVD->setInvalidDecl(); |
| 2303 | } |
| 2304 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 2305 | if (isVM && NewVD->hasAttr<BlocksAttr>()) { |
Mike Stump | c975bb0 | 2009-05-01 23:41:47 +0000 | [diff] [blame] | 2306 | Diag(NewVD->getLocation(), diag::err_block_on_vm); |
| 2307 | return NewVD->setInvalidDecl(); |
| 2308 | } |
| 2309 | |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 2310 | if (PrevDecl) { |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 2311 | Redeclaration = true; |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2312 | MergeVarDecl(NewVD, PrevDecl); |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2313 | } |
Zhongxing Xu | cb8f4f1 | 2009-01-16 02:36:34 +0000 | [diff] [blame] | 2314 | } |
| 2315 | |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 2316 | NamedDecl* |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2317 | Sema::ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 2318 | QualType R, NamedDecl* PrevDecl, |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 2319 | MultiTemplateParamsArg TemplateParamLists, |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2320 | bool IsFunctionDefinition, bool &Redeclaration) { |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2321 | assert(R.getTypePtr()->isFunctionType()); |
| 2322 | |
| 2323 | DeclarationName Name = GetNameForDeclarator(D); |
| 2324 | FunctionDecl::StorageClass SC = FunctionDecl::None; |
| 2325 | switch (D.getDeclSpec().getStorageClassSpec()) { |
| 2326 | default: assert(0 && "Unknown storage class!"); |
| 2327 | case DeclSpec::SCS_auto: |
| 2328 | case DeclSpec::SCS_register: |
| 2329 | case DeclSpec::SCS_mutable: |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 2330 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), |
| 2331 | diag::err_typecheck_sclass_func); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2332 | D.setInvalidType(); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2333 | break; |
| 2334 | case DeclSpec::SCS_unspecified: SC = FunctionDecl::None; break; |
| 2335 | case DeclSpec::SCS_extern: SC = FunctionDecl::Extern; break; |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 2336 | case DeclSpec::SCS_static: { |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 2337 | if (CurContext->getLookupContext()->isFunctionOrMethod()) { |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 2338 | // C99 6.7.1p5: |
| 2339 | // The declaration of an identifier for a function that has |
| 2340 | // block scope shall have no explicit storage-class specifier |
| 2341 | // other than extern |
| 2342 | // See also (C++ [dcl.stc]p4). |
| 2343 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), |
| 2344 | diag::err_static_block_func); |
| 2345 | SC = FunctionDecl::None; |
| 2346 | } else |
| 2347 | SC = FunctionDecl::Static; |
| 2348 | break; |
| 2349 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2350 | case DeclSpec::SCS_private_extern: SC = FunctionDecl::PrivateExtern;break; |
| 2351 | } |
| 2352 | |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 2353 | if (D.getDeclSpec().isThreadSpecified()) |
| 2354 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_invalid_thread); |
| 2355 | |
John McCall | 3f9a8a6 | 2009-08-11 06:59:38 +0000 | [diff] [blame] | 2356 | bool isFriend = D.getDeclSpec().isFriendSpecified(); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2357 | bool isInline = D.getDeclSpec().isInlineSpecified(); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2358 | bool isVirtual = D.getDeclSpec().isVirtualSpecified(); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2359 | bool isExplicit = D.getDeclSpec().isExplicitSpecified(); |
| 2360 | |
Anders Carlsson | 4681ebd | 2009-03-22 20:18:17 +0000 | [diff] [blame] | 2361 | // Check that the return type is not an abstract class type. |
Anders Carlsson | 8211eff | 2009-03-24 01:19:16 +0000 | [diff] [blame] | 2362 | // For record types, this is done by the AbstractClassUsageDiagnoser once |
| 2363 | // the class has been completely parsed. |
| 2364 | if (!DC->isRecord() && |
| 2365 | RequireNonAbstractType(D.getIdentifierLoc(), |
Anders Carlsson | 4681ebd | 2009-03-22 20:18:17 +0000 | [diff] [blame] | 2366 | R->getAsFunctionType()->getResultType(), |
Anders Carlsson | b9bbe49 | 2009-03-23 17:49:10 +0000 | [diff] [blame] | 2367 | diag::err_abstract_type_in_decl, |
Anders Carlsson | 8211eff | 2009-03-24 01:19:16 +0000 | [diff] [blame] | 2368 | AbstractReturnType)) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2369 | D.setInvalidType(); |
Chris Lattner | bb74982 | 2009-04-11 19:17:25 +0000 | [diff] [blame] | 2370 | |
| 2371 | // Do not allow returning a objc interface by-value. |
| 2372 | if (R->getAsFunctionType()->getResultType()->isObjCInterfaceType()) { |
| 2373 | Diag(D.getIdentifierLoc(), |
| 2374 | diag::err_object_cannot_be_passed_returned_by_value) << 0 |
| 2375 | << R->getAsFunctionType()->getResultType(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2376 | D.setInvalidType(); |
Chris Lattner | bb74982 | 2009-04-11 19:17:25 +0000 | [diff] [blame] | 2377 | } |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 2378 | |
| 2379 | // Check that we can declare a template here. |
| 2380 | if (TemplateParamLists.size() && |
| 2381 | CheckTemplateDeclScope(S, TemplateParamLists)) |
| 2382 | return 0; |
Anders Carlsson | 4681ebd | 2009-03-22 20:18:17 +0000 | [diff] [blame] | 2383 | |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2384 | bool isVirtualOkay = false; |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2385 | FunctionDecl *NewFD; |
John McCall | 3f9a8a6 | 2009-08-11 06:59:38 +0000 | [diff] [blame] | 2386 | if (isFriend) { |
| 2387 | // DC is the namespace in which the function is being declared. |
| 2388 | assert(DC->isFileContext() || PrevDecl); |
| 2389 | |
| 2390 | // C++ [class.friend]p5 |
| 2391 | // A function can be defined in a friend declaration of a |
| 2392 | // class . . . . Such a function is implicitly inline. |
| 2393 | isInline |= IsFunctionDefinition; |
| 2394 | |
| 2395 | NewFD = FriendFunctionDecl::Create(Context, DC, |
| 2396 | D.getIdentifierLoc(), Name, R, |
| 2397 | isInline, |
| 2398 | D.getDeclSpec().getFriendSpecLoc()); |
| 2399 | } else if (D.getKind() == Declarator::DK_Constructor) { |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2400 | // This is a C++ constructor declaration. |
| 2401 | assert(DC->isRecord() && |
| 2402 | "Constructors can only be declared in a member context"); |
| 2403 | |
Chris Lattner | 6540180 | 2009-04-25 08:28:21 +0000 | [diff] [blame] | 2404 | R = CheckConstructorDeclarator(D, R, SC); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2405 | |
| 2406 | // Create the new declaration |
| 2407 | NewFD = CXXConstructorDecl::Create(Context, |
| 2408 | cast<CXXRecordDecl>(DC), |
| 2409 | D.getIdentifierLoc(), Name, R, |
| 2410 | isExplicit, isInline, |
| 2411 | /*isImplicitlyDeclared=*/false); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2412 | } else if (D.getKind() == Declarator::DK_Destructor) { |
| 2413 | // This is a C++ destructor declaration. |
| 2414 | if (DC->isRecord()) { |
Chris Lattner | 6540180 | 2009-04-25 08:28:21 +0000 | [diff] [blame] | 2415 | R = CheckDestructorDeclarator(D, SC); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2416 | |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2417 | NewFD = CXXDestructorDecl::Create(Context, |
| 2418 | cast<CXXRecordDecl>(DC), |
| 2419 | D.getIdentifierLoc(), Name, R, |
| 2420 | isInline, |
| 2421 | /*isImplicitlyDeclared=*/false); |
| 2422 | |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2423 | isVirtualOkay = true; |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2424 | } else { |
| 2425 | Diag(D.getIdentifierLoc(), diag::err_destructor_not_member); |
| 2426 | |
| 2427 | // Create a FunctionDecl to satisfy the function definition parsing |
| 2428 | // code path. |
| 2429 | NewFD = FunctionDecl::Create(Context, DC, D.getIdentifierLoc(), |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 2430 | Name, R, SC, isInline, |
Douglas Gregor | 2224f84 | 2009-02-25 16:33:18 +0000 | [diff] [blame] | 2431 | /*hasPrototype=*/true, |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2432 | // FIXME: Move to DeclGroup... |
| 2433 | D.getDeclSpec().getSourceRange().getBegin()); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2434 | D.setInvalidType(); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2435 | } |
| 2436 | } else if (D.getKind() == Declarator::DK_Conversion) { |
| 2437 | if (!DC->isRecord()) { |
| 2438 | Diag(D.getIdentifierLoc(), |
| 2439 | diag::err_conv_function_not_member); |
| 2440 | return 0; |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2441 | } |
Chris Lattner | 6e47501 | 2009-04-25 08:35:12 +0000 | [diff] [blame] | 2442 | |
| 2443 | CheckConversionDeclarator(D, R, SC); |
| 2444 | NewFD = CXXConversionDecl::Create(Context, cast<CXXRecordDecl>(DC), |
| 2445 | D.getIdentifierLoc(), Name, R, |
| 2446 | isInline, isExplicit); |
| 2447 | |
| 2448 | isVirtualOkay = true; |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2449 | } else if (DC->isRecord()) { |
Anders Carlsson | 4649cac | 2009-04-30 22:41:11 +0000 | [diff] [blame] | 2450 | // If the of the function is the same as the name of the record, then this |
| 2451 | // must be an invalid constructor that has a return type. |
| 2452 | // (The parser checks for a return type and makes the declarator a |
| 2453 | // constructor if it has no return type). |
| 2454 | // must have an invalid constructor that has a return type |
| 2455 | if (Name.getAsIdentifierInfo() == cast<CXXRecordDecl>(DC)->getIdentifier()){ |
| 2456 | Diag(D.getIdentifierLoc(), diag::err_constructor_return_type) |
| 2457 | << SourceRange(D.getDeclSpec().getTypeSpecTypeLoc()) |
| 2458 | << SourceRange(D.getIdentifierLoc()); |
| 2459 | return 0; |
| 2460 | } |
| 2461 | |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2462 | // This is a C++ method declaration. |
| 2463 | NewFD = CXXMethodDecl::Create(Context, cast<CXXRecordDecl>(DC), |
| 2464 | D.getIdentifierLoc(), Name, R, |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 2465 | (SC == FunctionDecl::Static), isInline); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2466 | |
| 2467 | isVirtualOkay = (SC != FunctionDecl::Static); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2468 | } else { |
Douglas Gregor | d874def | 2009-03-19 18:33:54 +0000 | [diff] [blame] | 2469 | // Determine whether the function was written with a |
| 2470 | // prototype. This true when: |
| 2471 | // - we're in C++ (where every function has a prototype), |
| 2472 | // - there is a prototype in the declarator, or |
| 2473 | // - the type R of the function is some kind of typedef or other reference |
| 2474 | // to a type name (which eventually refers to a function type). |
Douglas Gregor | 13d7a32 | 2009-03-19 18:14:46 +0000 | [diff] [blame] | 2475 | bool HasPrototype = |
Chris Lattner | 0d48bf9 | 2009-03-17 23:17:04 +0000 | [diff] [blame] | 2476 | getLangOptions().CPlusPlus || |
Douglas Gregor | 13d7a32 | 2009-03-19 18:14:46 +0000 | [diff] [blame] | 2477 | (D.getNumTypeObjects() && D.getTypeObject(0).Fun.hasPrototype) || |
Douglas Gregor | d1659a6 | 2009-03-23 16:26:51 +0000 | [diff] [blame] | 2478 | (!isa<FunctionType>(R.getTypePtr()) && R->isFunctionProtoType()); |
Chris Lattner | 0d48bf9 | 2009-03-17 23:17:04 +0000 | [diff] [blame] | 2479 | |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2480 | NewFD = FunctionDecl::Create(Context, DC, |
| 2481 | D.getIdentifierLoc(), |
Chris Lattner | 0d48bf9 | 2009-03-17 23:17:04 +0000 | [diff] [blame] | 2482 | Name, R, SC, isInline, HasPrototype, |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2483 | // FIXME: Move to DeclGroup... |
| 2484 | D.getDeclSpec().getSourceRange().getBegin()); |
| 2485 | } |
| 2486 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2487 | if (D.isInvalidType()) |
Chris Lattner | 584be45 | 2009-04-25 05:44:12 +0000 | [diff] [blame] | 2488 | NewFD->setInvalidDecl(); |
| 2489 | |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2490 | // Set the lexical context. If the declarator has a C++ |
| 2491 | // scope specifier, the lexical context will be different |
| 2492 | // from the semantic context. |
| 2493 | NewFD->setLexicalDeclContext(CurContext); |
| 2494 | |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 2495 | // Match up the template parameter lists with the scope specifier, then |
| 2496 | // determine whether we have a template or a template specialization. |
Douglas Gregor | c5c903a | 2009-06-24 00:23:40 +0000 | [diff] [blame] | 2497 | FunctionTemplateDecl *FunctionTemplate = 0; |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 2498 | if (TemplateParameterList *TemplateParams |
| 2499 | = MatchTemplateParametersToScopeSpecifier( |
| 2500 | D.getDeclSpec().getSourceRange().getBegin(), |
| 2501 | D.getCXXScopeSpec(), |
Douglas Gregor | 27eeb5e | 2009-07-22 22:05:02 +0000 | [diff] [blame] | 2502 | (TemplateParameterList**)TemplateParamLists.get(), |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 2503 | TemplateParamLists.size())) { |
Douglas Gregor | c5c903a | 2009-06-24 00:23:40 +0000 | [diff] [blame] | 2504 | if (TemplateParams->size() > 0) { |
| 2505 | // This is a function template |
| 2506 | FunctionTemplate = FunctionTemplateDecl::Create(Context, CurContext, |
| 2507 | NewFD->getLocation(), |
| 2508 | Name, TemplateParams, |
| 2509 | NewFD); |
| 2510 | NewFD->setDescribedFunctionTemplate(FunctionTemplate); |
| 2511 | } else { |
| 2512 | // FIXME: Handle function template specializations |
| 2513 | } |
Douglas Gregor | 27eeb5e | 2009-07-22 22:05:02 +0000 | [diff] [blame] | 2514 | |
| 2515 | // FIXME: Free this memory properly. |
| 2516 | TemplateParamLists.release(); |
Douglas Gregor | dfe3f2d | 2009-07-22 17:18:37 +0000 | [diff] [blame] | 2517 | } |
Douglas Gregor | c5c903a | 2009-06-24 00:23:40 +0000 | [diff] [blame] | 2518 | |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2519 | // C++ [dcl.fct.spec]p5: |
| 2520 | // The virtual specifier shall only be used in declarations of |
| 2521 | // nonstatic class member functions that appear within a |
| 2522 | // member-specification of a class declaration; see 10.3. |
| 2523 | // |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2524 | if (isVirtual && !NewFD->isInvalidDecl()) { |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2525 | if (!isVirtualOkay) { |
| 2526 | Diag(D.getDeclSpec().getVirtualSpecLoc(), |
| 2527 | diag::err_virtual_non_function); |
| 2528 | } else if (!CurContext->isRecord()) { |
| 2529 | // 'virtual' was specified outside of the class. |
| 2530 | Diag(D.getDeclSpec().getVirtualSpecLoc(), diag::err_virtual_out_of_class) |
| 2531 | << CodeModificationHint::CreateRemoval( |
| 2532 | SourceRange(D.getDeclSpec().getVirtualSpecLoc())); |
| 2533 | } else { |
| 2534 | // Okay: Add virtual to the method. |
Anders Carlsson | 77b7f1d | 2009-05-14 22:15:41 +0000 | [diff] [blame] | 2535 | cast<CXXMethodDecl>(NewFD)->setVirtualAsWritten(true); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2536 | CXXRecordDecl *CurClass = cast<CXXRecordDecl>(DC); |
| 2537 | CurClass->setAggregate(false); |
| 2538 | CurClass->setPOD(false); |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 2539 | CurClass->setEmpty(false); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2540 | CurClass->setPolymorphic(true); |
Anders Carlsson | 347ba89 | 2009-04-16 00:08:20 +0000 | [diff] [blame] | 2541 | CurClass->setHasTrivialConstructor(false); |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 2542 | CurClass->setHasTrivialCopyConstructor(false); |
| 2543 | CurClass->setHasTrivialCopyAssignment(false); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 2544 | } |
| 2545 | } |
| 2546 | |
Anders Carlsson | d7ba27d | 2009-05-14 01:09:04 +0000 | [diff] [blame] | 2547 | if (CXXMethodDecl *NewMD = dyn_cast<CXXMethodDecl>(NewFD)) { |
| 2548 | // Look for virtual methods in base classes that this method might override. |
| 2549 | |
| 2550 | BasePaths Paths; |
Anders Carlsson | d7ba27d | 2009-05-14 01:09:04 +0000 | [diff] [blame] | 2551 | if (LookupInBases(cast<CXXRecordDecl>(DC), |
Anders Carlsson | d12ef8d | 2009-05-30 00:52:53 +0000 | [diff] [blame] | 2552 | MemberLookupCriteria(NewMD), Paths)) { |
Anders Carlsson | d7ba27d | 2009-05-14 01:09:04 +0000 | [diff] [blame] | 2553 | for (BasePaths::decl_iterator I = Paths.found_decls_begin(), |
| 2554 | E = Paths.found_decls_end(); I != E; ++I) { |
| 2555 | if (CXXMethodDecl *OldMD = dyn_cast<CXXMethodDecl>(*I)) { |
Sebastian Redl | 23c7d06 | 2009-07-07 20:29:57 +0000 | [diff] [blame] | 2556 | if (!CheckOverridingFunctionReturnType(NewMD, OldMD) && |
| 2557 | !CheckOverridingFunctionExceptionSpec(NewMD, OldMD)) |
Anders Carlsson | 758a422 | 2009-05-16 23:59:08 +0000 | [diff] [blame] | 2558 | NewMD->addOverriddenMethod(OldMD); |
Anders Carlsson | d7ba27d | 2009-05-14 01:09:04 +0000 | [diff] [blame] | 2559 | } |
| 2560 | } |
Anders Carlsson | d7ba27d | 2009-05-14 01:09:04 +0000 | [diff] [blame] | 2561 | } |
Anders Carlsson | d7ba27d | 2009-05-14 01:09:04 +0000 | [diff] [blame] | 2562 | } |
| 2563 | |
Douglas Gregor | 656de63 | 2009-03-11 23:52:16 +0000 | [diff] [blame] | 2564 | if (SC == FunctionDecl::Static && isa<CXXMethodDecl>(NewFD) && |
| 2565 | !CurContext->isRecord()) { |
| 2566 | // C++ [class.static]p1: |
| 2567 | // A data or function member of a class may be declared static |
| 2568 | // in a class definition, in which case it is a static member of |
| 2569 | // the class. |
| 2570 | |
| 2571 | // Complain about the 'static' specifier if it's on an out-of-line |
| 2572 | // member function definition. |
| 2573 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), |
| 2574 | diag::err_static_out_of_line) |
| 2575 | << CodeModificationHint::CreateRemoval( |
| 2576 | SourceRange(D.getDeclSpec().getStorageClassSpecLoc())); |
| 2577 | } |
| 2578 | |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2579 | // Handle GNU asm-label extension (encoded as an attribute). |
| 2580 | if (Expr *E = (Expr*) D.getAsmLabel()) { |
| 2581 | // The parser guarantees this is a string. |
| 2582 | StringLiteral *SE = cast<StringLiteral>(E); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 2583 | NewFD->addAttr(::new (Context) AsmLabelAttr(std::string(SE->getStrData(), |
Chris Lattner | 0b2b6e1 | 2009-03-04 06:34:08 +0000 | [diff] [blame] | 2584 | SE->getByteLength()))); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2585 | } |
| 2586 | |
Chris Lattner | 2dbd285 | 2009-04-25 06:12:16 +0000 | [diff] [blame] | 2587 | // Copy the parameter declarations from the declarator D to the function |
| 2588 | // declaration NewFD, if they are available. First scavenge them into Params. |
| 2589 | llvm::SmallVector<ParmVarDecl*, 16> Params; |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2590 | if (D.getNumTypeObjects() > 0) { |
| 2591 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(0).Fun; |
| 2592 | |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2593 | // Check for C99 6.7.5.3p10 - foo(void) is a non-varargs |
| 2594 | // function that takes no arguments, not a function that takes a |
| 2595 | // single void argument. |
| 2596 | // We let through "const void" here because Sema::GetTypeForDeclarator |
| 2597 | // already checks for that case. |
| 2598 | if (FTI.NumArgs == 1 && !FTI.isVariadic && FTI.ArgInfo[0].Ident == 0 && |
| 2599 | FTI.ArgInfo[0].Param && |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 2600 | FTI.ArgInfo[0].Param.getAs<ParmVarDecl>()->getType()->isVoidType()) { |
Chris Lattner | 2dbd285 | 2009-04-25 06:12:16 +0000 | [diff] [blame] | 2601 | // Empty arg list, don't push any params. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 2602 | ParmVarDecl *Param = FTI.ArgInfo[0].Param.getAs<ParmVarDecl>(); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2603 | |
| 2604 | // In C++, the empty parameter-type-list must be spelled "void"; a |
| 2605 | // typedef of void is not permitted. |
| 2606 | if (getLangOptions().CPlusPlus && |
Chris Lattner | 584be45 | 2009-04-25 05:44:12 +0000 | [diff] [blame] | 2607 | Param->getType().getUnqualifiedType() != Context.VoidTy) |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 2608 | Diag(Param->getLocation(), diag::err_param_typedef_of_void); |
Chris Lattner | 2dbd285 | 2009-04-25 06:12:16 +0000 | [diff] [blame] | 2609 | // FIXME: Leaks decl? |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2610 | } else if (FTI.NumArgs > 0 && FTI.ArgInfo[0].Param != 0) { |
Argyrios Kyrtzidis | 9bedef6 | 2009-07-14 03:18:53 +0000 | [diff] [blame] | 2611 | for (unsigned i = 0, e = FTI.NumArgs; i != e; ++i) { |
| 2612 | ParmVarDecl *Param = FTI.ArgInfo[i].Param.getAs<ParmVarDecl>(); |
| 2613 | assert(Param->getDeclContext() != NewFD && "Was set before ?"); |
| 2614 | Param->setDeclContext(NewFD); |
| 2615 | Params.push_back(Param); |
| 2616 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2617 | } |
| 2618 | |
Chris Lattner | 1ad9b28 | 2009-04-25 06:03:53 +0000 | [diff] [blame] | 2619 | } else if (const FunctionProtoType *FT = R->getAsFunctionProtoType()) { |
| 2620 | // 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] | 2621 | // following example, we'll need to synthesize (unnamed) |
| 2622 | // parameters for use in the declaration. |
| 2623 | // |
| 2624 | // @code |
| 2625 | // typedef void fn(int); |
| 2626 | // fn f; |
| 2627 | // @endcode |
Chris Lattner | 1ad9b28 | 2009-04-25 06:03:53 +0000 | [diff] [blame] | 2628 | |
| 2629 | // Synthesize a parameter for each argument type. |
Chris Lattner | 1ad9b28 | 2009-04-25 06:03:53 +0000 | [diff] [blame] | 2630 | for (FunctionProtoType::arg_type_iterator AI = FT->arg_type_begin(), |
| 2631 | AE = FT->arg_type_end(); AI != AE; ++AI) { |
| 2632 | ParmVarDecl *Param = ParmVarDecl::Create(Context, DC, |
| 2633 | SourceLocation(), 0, |
| 2634 | *AI, VarDecl::None, 0); |
| 2635 | Param->setImplicit(); |
| 2636 | Params.push_back(Param); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2637 | } |
Chris Lattner | 84bb944 | 2009-04-25 18:38:18 +0000 | [diff] [blame] | 2638 | } else { |
| 2639 | assert(R->isFunctionNoProtoType() && NewFD->getNumParams() == 0 && |
| 2640 | "Should not need args for typedef of non-prototype fn"); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2641 | } |
Chris Lattner | 2dbd285 | 2009-04-25 06:12:16 +0000 | [diff] [blame] | 2642 | // Finally, we know we have the right number of parameters, install them. |
Jay Foad | beaaccd | 2009-05-21 09:52:38 +0000 | [diff] [blame] | 2643 | NewFD->setParams(Context, Params.data(), Params.size()); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2644 | |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 2645 | // If name lookup finds a previous declaration that is not in the |
| 2646 | // same scope as the new declaration, this may still be an |
| 2647 | // acceptable redeclaration. |
| 2648 | if (PrevDecl && !isDeclInScope(PrevDecl, DC, S) && |
Douglas Gregor | d6f7e9d | 2009-02-24 20:03:32 +0000 | [diff] [blame] | 2649 | !(NewFD->hasLinkage() && |
| 2650 | isOutOfScopePreviousDeclaration(PrevDecl, DC, Context))) |
Douglas Gregor | 8f30105 | 2009-02-24 19:23:27 +0000 | [diff] [blame] | 2651 | PrevDecl = 0; |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 2652 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2653 | // Perform semantic checking on the function declaration. |
| 2654 | bool OverloadableAttrRequired = false; // FIXME: HACK! |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2655 | CheckFunctionDeclaration(NewFD, PrevDecl, Redeclaration, |
| 2656 | /*FIXME:*/OverloadableAttrRequired); |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2657 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2658 | if (D.getCXXScopeSpec().isSet() && !NewFD->isInvalidDecl()) { |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2659 | // An out-of-line member function declaration must also be a |
| 2660 | // definition (C++ [dcl.meaning]p1). |
John McCall | 3f9a8a6 | 2009-08-11 06:59:38 +0000 | [diff] [blame] | 2661 | if (!IsFunctionDefinition && !isFriend) { |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2662 | Diag(NewFD->getLocation(), diag::err_out_of_line_declaration) |
| 2663 | << D.getCXXScopeSpec().getRange(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2664 | NewFD->setInvalidDecl(); |
Douglas Gregor | 9cfbe48 | 2009-06-20 00:51:54 +0000 | [diff] [blame] | 2665 | } else if (!Redeclaration && (!PrevDecl || !isa<UsingDecl>(PrevDecl))) { |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2666 | // The user tried to provide an out-of-line definition for a |
| 2667 | // function that is a member of a class or namespace, but there |
| 2668 | // was no such member function declared (C++ [class.mfct]p2, |
| 2669 | // C++ [namespace.memdef]p2). For example: |
| 2670 | // |
| 2671 | // class X { |
| 2672 | // void f() const; |
| 2673 | // }; |
| 2674 | // |
| 2675 | // void X::f() { } // ill-formed |
| 2676 | // |
| 2677 | // Complain about this problem, and attempt to suggest close |
| 2678 | // matches (e.g., those that differ only in cv-qualifiers and |
| 2679 | // whether the parameter types are references). |
| 2680 | Diag(D.getIdentifierLoc(), diag::err_member_def_does_not_match) |
| 2681 | << cast<NamedDecl>(DC) << D.getCXXScopeSpec().getRange(); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2682 | NewFD->setInvalidDecl(); |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2683 | |
| 2684 | LookupResult Prev = LookupQualifiedName(DC, Name, LookupOrdinaryName, |
| 2685 | true); |
| 2686 | assert(!Prev.isAmbiguous() && |
| 2687 | "Cannot have an ambiguity in previous-declaration lookup"); |
| 2688 | for (LookupResult::iterator Func = Prev.begin(), FuncEnd = Prev.end(); |
| 2689 | Func != FuncEnd; ++Func) { |
| 2690 | if (isa<FunctionDecl>(*Func) && |
| 2691 | isNearlyMatchingFunction(Context, cast<FunctionDecl>(*Func), NewFD)) |
| 2692 | Diag((*Func)->getLocation(), diag::note_member_def_close_match); |
| 2693 | } |
| 2694 | |
| 2695 | PrevDecl = 0; |
| 2696 | } |
| 2697 | } |
| 2698 | |
| 2699 | // Handle attributes. We need to have merged decls when handling attributes |
| 2700 | // (for example to check for conflicts, etc). |
| 2701 | // FIXME: This needs to happen before we merge declarations. Then, |
| 2702 | // let attribute merging cope with attribute conflicts. |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 2703 | ProcessDeclAttributes(S, NewFD, D); |
Ryan Flynn | 478fbc6 | 2009-07-25 22:29:44 +0000 | [diff] [blame] | 2704 | |
| 2705 | // attributes declared post-definition are currently ignored |
| 2706 | if (PrevDecl) { |
| 2707 | const FunctionDecl *Def, *PrevFD = dyn_cast<FunctionDecl>(PrevDecl); |
| 2708 | if (PrevFD && PrevFD->getBody(Def) && D.hasAttributes()) { |
| 2709 | Diag(NewFD->getLocation(), diag::warn_attribute_precede_definition); |
| 2710 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 2711 | } |
| 2712 | } |
| 2713 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2714 | AddKnownFunctionAttributes(NewFD); |
| 2715 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 2716 | if (OverloadableAttrRequired && !NewFD->getAttr<OverloadableAttr>()) { |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2717 | // If a function name is overloadable in C, then every function |
| 2718 | // with that name must be marked "overloadable". |
| 2719 | Diag(NewFD->getLocation(), diag::err_attribute_overloadable_missing) |
| 2720 | << Redeclaration << NewFD; |
| 2721 | if (PrevDecl) |
| 2722 | Diag(PrevDecl->getLocation(), |
| 2723 | diag::note_attribute_overloadable_prev_overload); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 2724 | NewFD->addAttr(::new (Context) OverloadableAttr()); |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2725 | } |
| 2726 | |
| 2727 | // If this is a locally-scoped extern C function, update the |
| 2728 | // map of such names. |
| 2729 | if (CurContext->isFunctionOrMethod() && NewFD->isExternC(Context) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2730 | && !NewFD->isInvalidDecl()) |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2731 | RegisterLocallyScopedExternCDecl(NewFD, PrevDecl, S); |
| 2732 | |
Argyrios Kyrtzidis | 16f1930 | 2009-06-25 18:22:24 +0000 | [diff] [blame] | 2733 | // Set this FunctionDecl's range up to the right paren. |
| 2734 | NewFD->setLocEnd(D.getSourceRange().getEnd()); |
| 2735 | |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 2736 | if (FunctionTemplate && NewFD->isInvalidDecl()) |
| 2737 | FunctionTemplate->setInvalidDecl(); |
| 2738 | |
| 2739 | if (FunctionTemplate) |
| 2740 | return FunctionTemplate; |
| 2741 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2742 | return NewFD; |
| 2743 | } |
| 2744 | |
| 2745 | /// \brief Perform semantic checking of a new function declaration. |
| 2746 | /// |
| 2747 | /// Performs semantic analysis of the new function declaration |
| 2748 | /// NewFD. This routine performs all semantic checking that does not |
| 2749 | /// require the actual declarator involved in the declaration, and is |
| 2750 | /// used both for the declaration of functions as they are parsed |
| 2751 | /// (called via ActOnDeclarator) and for the declaration of functions |
| 2752 | /// that have been instantiated via C++ template instantiation (called |
| 2753 | /// via InstantiateDecl). |
| 2754 | /// |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2755 | /// This sets NewFD->isInvalidDecl() to true if there was an error. |
| 2756 | void Sema::CheckFunctionDeclaration(FunctionDecl *NewFD, NamedDecl *&PrevDecl, |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2757 | bool &Redeclaration, |
| 2758 | bool &OverloadableAttrRequired) { |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2759 | // If NewFD is already known erroneous, don't do any of this checking. |
| 2760 | if (NewFD->isInvalidDecl()) |
| 2761 | return; |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2762 | |
Eli Friedman | 88f7b57 | 2009-05-16 12:15:55 +0000 | [diff] [blame] | 2763 | if (NewFD->getResultType()->isVariablyModifiedType()) { |
| 2764 | // Functions returning a variably modified type violate C99 6.7.5.2p2 |
| 2765 | // because all functions have linkage. |
| 2766 | Diag(NewFD->getLocation(), diag::err_vm_func_decl); |
| 2767 | return NewFD->setInvalidDecl(); |
| 2768 | } |
| 2769 | |
John McCall | 07a5c22 | 2009-08-15 02:09:25 +0000 | [diff] [blame] | 2770 | if (NewFD->isMain(Context)) CheckMain(NewFD); |
John McCall | 8c4859a | 2009-07-24 03:03:21 +0000 | [diff] [blame] | 2771 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2772 | // Semantic checking for this function declaration (in isolation). |
| 2773 | if (getLangOptions().CPlusPlus) { |
| 2774 | // C++-specific checks. |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2775 | if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(NewFD)) { |
Chris Lattner | 6e47501 | 2009-04-25 08:35:12 +0000 | [diff] [blame] | 2776 | CheckConstructor(Constructor); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2777 | } else if (isa<CXXDestructorDecl>(NewFD)) { |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2778 | CXXRecordDecl *Record = cast<CXXRecordDecl>(NewFD->getParent()); |
Fariborz Jahanian | c19f959 | 2009-07-21 15:28:50 +0000 | [diff] [blame] | 2779 | QualType ClassType = Context.getTypeDeclType(Record); |
| 2780 | if (!ClassType->isDependentType()) { |
Fariborz Jahanian | c19f959 | 2009-07-21 15:28:50 +0000 | [diff] [blame] | 2781 | DeclarationName Name |
Douglas Gregor | 50d62d1 | 2009-08-05 05:36:45 +0000 | [diff] [blame] | 2782 | = Context.DeclarationNames.getCXXDestructorName( |
| 2783 | Context.getCanonicalType(ClassType)); |
Fariborz Jahanian | c19f959 | 2009-07-21 15:28:50 +0000 | [diff] [blame] | 2784 | if (NewFD->getDeclName() != Name) { |
| 2785 | Diag(NewFD->getLocation(), diag::err_destructor_name); |
| 2786 | return NewFD->setInvalidDecl(); |
| 2787 | } |
| 2788 | } |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2789 | Record->setUserDeclaredDestructor(true); |
| 2790 | // C++ [class]p4: A POD-struct is an aggregate class that has [...] no |
| 2791 | // user-defined destructor. |
| 2792 | Record->setPOD(false); |
Anders Carlsson | 072abef | 2009-04-17 02:34:54 +0000 | [diff] [blame] | 2793 | |
| 2794 | // C++ [class.dtor]p3: A destructor is trivial if it is an implicitly- |
| 2795 | // declared destructor. |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 2796 | // FIXME: C++0x: don't do this for "= default" destructors |
Anders Carlsson | 072abef | 2009-04-17 02:34:54 +0000 | [diff] [blame] | 2797 | Record->setHasTrivialDestructor(false); |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2798 | } else if (CXXConversionDecl *Conversion |
| 2799 | = dyn_cast<CXXConversionDecl>(NewFD)) |
| 2800 | ActOnConversionDeclarator(Conversion); |
| 2801 | |
| 2802 | // Extra checking for C++ overloaded operators (C++ [over.oper]). |
| 2803 | if (NewFD->isOverloadedOperator() && |
| 2804 | CheckOverloadedOperatorDeclaration(NewFD)) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2805 | return NewFD->setInvalidDecl(); |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2806 | } |
| 2807 | |
Douglas Gregor | b3efa98 | 2009-04-23 18:22:55 +0000 | [diff] [blame] | 2808 | // C99 6.7.4p6: |
| 2809 | // [... ] For a function with external linkage, the following |
| 2810 | // restrictions apply: [...] If all of the file scope declarations |
| 2811 | // for a function in a translation unit include the inline |
| 2812 | // function specifier without extern, then the definition in that |
| 2813 | // translation unit is an inline definition. An inline definition |
| 2814 | // does not provide an external definition for the function, and |
| 2815 | // does not forbid an external definition in another translation |
| 2816 | // unit. |
| 2817 | // |
| 2818 | // Here we determine whether this function, in isolation, would be a |
| 2819 | // C99 inline definition. MergeCompatibleFunctionDecls looks at |
| 2820 | // previous declarations. |
Douglas Gregor | 9f9bf25 | 2009-04-28 06:37:30 +0000 | [diff] [blame] | 2821 | if (NewFD->isInline() && getLangOptions().C99 && |
| 2822 | NewFD->getStorageClass() == FunctionDecl::None && |
| 2823 | NewFD->getDeclContext()->getLookupContext()->isTranslationUnit()) |
| 2824 | NewFD->setC99InlineDefinition(true); |
Douglas Gregor | b3efa98 | 2009-04-23 18:22:55 +0000 | [diff] [blame] | 2825 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2826 | // Check for a previous declaration of this name. |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 2827 | if (!PrevDecl && NewFD->isExternC(Context)) { |
| 2828 | // Since we did not find anything by this name and we're declaring |
| 2829 | // an extern "C" function, look for a non-visible extern "C" |
| 2830 | // declaration with the same name. |
| 2831 | llvm::DenseMap<DeclarationName, NamedDecl *>::iterator Pos |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2832 | = LocallyScopedExternalDecls.find(NewFD->getDeclName()); |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 2833 | if (Pos != LocallyScopedExternalDecls.end()) |
| 2834 | PrevDecl = Pos->second; |
| 2835 | } |
| 2836 | |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 2837 | // Merge or overload the declaration with an existing declaration of |
| 2838 | // the same name, if appropriate. |
Douglas Gregor | 04495c8 | 2009-02-24 01:23:02 +0000 | [diff] [blame] | 2839 | if (PrevDecl) { |
Douglas Gregor | f9201e0 | 2009-02-11 23:02:49 +0000 | [diff] [blame] | 2840 | // Determine whether NewFD is an overload of PrevDecl or |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2841 | // a declaration that requires merging. If it's an overload, |
| 2842 | // there's no more work to do here; we'll just add the new |
| 2843 | // function to the scope. |
| 2844 | OverloadedFunctionDecl::function_iterator MatchedDecl; |
Douglas Gregor | ae17094 | 2009-02-13 00:26:38 +0000 | [diff] [blame] | 2845 | |
| 2846 | if (!getLangOptions().CPlusPlus && |
Douglas Gregor | c6666f8 | 2009-02-18 06:34:51 +0000 | [diff] [blame] | 2847 | AllowOverloadingOfFunction(PrevDecl, Context)) { |
Douglas Gregor | ae17094 | 2009-02-13 00:26:38 +0000 | [diff] [blame] | 2848 | OverloadableAttrRequired = true; |
| 2849 | |
Douglas Gregor | c6666f8 | 2009-02-18 06:34:51 +0000 | [diff] [blame] | 2850 | // Functions marked "overloadable" must have a prototype (that |
| 2851 | // we can't get through declaration merging). |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2852 | if (!NewFD->getType()->getAsFunctionProtoType()) { |
Douglas Gregor | c6666f8 | 2009-02-18 06:34:51 +0000 | [diff] [blame] | 2853 | Diag(NewFD->getLocation(), diag::err_attribute_overloadable_no_prototype) |
| 2854 | << NewFD; |
Douglas Gregor | c6666f8 | 2009-02-18 06:34:51 +0000 | [diff] [blame] | 2855 | Redeclaration = true; |
| 2856 | |
| 2857 | // Turn this into a variadic function with no parameters. |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2858 | QualType R = Context.getFunctionType( |
| 2859 | NewFD->getType()->getAsFunctionType()->getResultType(), |
| 2860 | 0, 0, true, 0); |
Douglas Gregor | c6666f8 | 2009-02-18 06:34:51 +0000 | [diff] [blame] | 2861 | NewFD->setType(R); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2862 | return NewFD->setInvalidDecl(); |
Douglas Gregor | c6666f8 | 2009-02-18 06:34:51 +0000 | [diff] [blame] | 2863 | } |
| 2864 | } |
| 2865 | |
| 2866 | if (PrevDecl && |
| 2867 | (!AllowOverloadingOfFunction(PrevDecl, Context) || |
Douglas Gregor | 9cfbe48 | 2009-06-20 00:51:54 +0000 | [diff] [blame] | 2868 | !IsOverload(NewFD, PrevDecl, MatchedDecl)) && |
| 2869 | !isa<UsingDecl>(PrevDecl)) { |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 2870 | Redeclaration = true; |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2871 | Decl *OldDecl = PrevDecl; |
| 2872 | |
| 2873 | // If PrevDecl was an overloaded function, extract the |
| 2874 | // FunctionDecl that matched. |
| 2875 | if (isa<OverloadedFunctionDecl>(PrevDecl)) |
| 2876 | OldDecl = *MatchedDecl; |
| 2877 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2878 | // NewFD and OldDecl represent declarations that need to be |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2879 | // merged. |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 2880 | if (MergeFunctionDecl(NewFD, OldDecl)) |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2881 | return NewFD->setInvalidDecl(); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2882 | |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 2883 | if (FunctionTemplateDecl *OldTemplateDecl |
| 2884 | = dyn_cast<FunctionTemplateDecl>(OldDecl)) |
| 2885 | NewFD->setPreviousDeclaration(OldTemplateDecl->getTemplatedDecl()); |
Argyrios Kyrtzidis | 9bedef6 | 2009-07-14 03:18:53 +0000 | [diff] [blame] | 2886 | else { |
| 2887 | if (isa<CXXMethodDecl>(NewFD)) // Set access for out-of-line definitions |
| 2888 | NewFD->setAccess(OldDecl->getAccess()); |
Douglas Gregor | e53060f | 2009-06-25 22:08:12 +0000 | [diff] [blame] | 2889 | NewFD->setPreviousDeclaration(cast<FunctionDecl>(OldDecl)); |
Argyrios Kyrtzidis | 9bedef6 | 2009-07-14 03:18:53 +0000 | [diff] [blame] | 2890 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2891 | } |
Douglas Gregor | 4ce205f | 2009-02-06 17:46:57 +0000 | [diff] [blame] | 2892 | } |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2893 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 2894 | // In C++, check default arguments now that we have merged decls. Unless |
| 2895 | // the lexical context is the class, because in this case this is done |
| 2896 | // during delayed parsing anyway. |
| 2897 | if (getLangOptions().CPlusPlus && !CurContext->isRecord()) |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 2898 | CheckCXXDefaultArguments(NewFD); |
Zhongxing Xu | 416fcaf | 2009-01-16 01:13:29 +0000 | [diff] [blame] | 2899 | } |
| 2900 | |
John McCall | 8c4859a | 2009-07-24 03:03:21 +0000 | [diff] [blame] | 2901 | void Sema::CheckMain(FunctionDecl* FD) { |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 2902 | // C++ [basic.start.main]p3: A program that declares main to be inline |
| 2903 | // or static is ill-formed. |
| 2904 | // C99 6.7.4p4: In a hosted environment, the inline function specifier |
| 2905 | // shall not appear in a declaration of main. |
| 2906 | // static main is not an error under C99, but we should warn about it. |
| 2907 | bool isInline = FD->isInline(); |
| 2908 | bool isStatic = FD->getStorageClass() == FunctionDecl::Static; |
| 2909 | if (isInline || isStatic) { |
| 2910 | unsigned diagID = diag::warn_unusual_main_decl; |
| 2911 | if (isInline || getLangOptions().CPlusPlus) |
| 2912 | diagID = diag::err_unusual_main_decl; |
| 2913 | |
| 2914 | int which = isStatic + (isInline << 1) - 1; |
| 2915 | Diag(FD->getLocation(), diagID) << which; |
| 2916 | } |
| 2917 | |
| 2918 | QualType T = FD->getType(); |
| 2919 | assert(T->isFunctionType() && "function decl is not of function type"); |
| 2920 | const FunctionType* FT = T->getAsFunctionType(); |
| 2921 | |
| 2922 | if (!Context.hasSameUnqualifiedType(FT->getResultType(), Context.IntTy)) { |
| 2923 | // TODO: add a replacement fixit to turn the return type into 'int'. |
| 2924 | Diag(FD->getTypeSpecStartLoc(), diag::err_main_returns_nonint); |
| 2925 | FD->setInvalidDecl(true); |
| 2926 | } |
| 2927 | |
| 2928 | // Treat protoless main() as nullary. |
| 2929 | if (isa<FunctionNoProtoType>(FT)) return; |
| 2930 | |
| 2931 | const FunctionProtoType* FTP = cast<const FunctionProtoType>(FT); |
| 2932 | unsigned nparams = FTP->getNumArgs(); |
| 2933 | assert(FD->getNumParams() == nparams); |
| 2934 | |
| 2935 | if (nparams > 3) { |
| 2936 | Diag(FD->getLocation(), diag::err_main_surplus_args) << nparams; |
| 2937 | FD->setInvalidDecl(true); |
| 2938 | nparams = 3; |
| 2939 | } |
| 2940 | |
| 2941 | // FIXME: a lot of the following diagnostics would be improved |
| 2942 | // if we had some location information about types. |
| 2943 | |
| 2944 | QualType CharPP = |
| 2945 | Context.getPointerType(Context.getPointerType(Context.CharTy)); |
| 2946 | QualType Expected[] = { Context.IntTy, CharPP, CharPP }; |
| 2947 | |
| 2948 | for (unsigned i = 0; i < nparams; ++i) { |
| 2949 | QualType AT = FTP->getArgType(i); |
| 2950 | |
| 2951 | bool mismatch = true; |
| 2952 | |
| 2953 | if (Context.hasSameUnqualifiedType(AT, Expected[i])) |
| 2954 | mismatch = false; |
| 2955 | else if (Expected[i] == CharPP) { |
| 2956 | // As an extension, the following forms are okay: |
| 2957 | // char const ** |
| 2958 | // char const * const * |
| 2959 | // char * const * |
| 2960 | |
| 2961 | QualifierSet qs; |
| 2962 | const PointerType* PT; |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 2963 | if ((PT = qs.strip(AT)->getAs<PointerType>()) && |
| 2964 | (PT = qs.strip(PT->getPointeeType())->getAs<PointerType>()) && |
John McCall | 13591ed | 2009-07-25 04:36:53 +0000 | [diff] [blame] | 2965 | (QualType(qs.strip(PT->getPointeeType()), 0) == Context.CharTy)) { |
| 2966 | qs.removeConst(); |
| 2967 | mismatch = !qs.empty(); |
| 2968 | } |
| 2969 | } |
| 2970 | |
| 2971 | if (mismatch) { |
| 2972 | Diag(FD->getLocation(), diag::err_main_arg_wrong) << i << Expected[i]; |
| 2973 | // TODO: suggest replacing given type with expected type |
| 2974 | FD->setInvalidDecl(true); |
| 2975 | } |
| 2976 | } |
| 2977 | |
| 2978 | if (nparams == 1 && !FD->isInvalidDecl()) { |
| 2979 | Diag(FD->getLocation(), diag::warn_main_one_arg); |
| 2980 | } |
John McCall | 8c4859a | 2009-07-24 03:03:21 +0000 | [diff] [blame] | 2981 | } |
| 2982 | |
Eli Friedman | c594b32 | 2008-05-20 13:48:25 +0000 | [diff] [blame] | 2983 | bool Sema::CheckForConstantInitializer(Expr *Init, QualType DclT) { |
Eli Friedman | 3b8a36a | 2009-02-27 04:17:12 +0000 | [diff] [blame] | 2984 | // FIXME: Need strict checking. In C89, we need to check for |
| 2985 | // any assignment, increment, decrement, function-calls, or |
| 2986 | // commas outside of a sizeof. In C99, it's the same list, |
| 2987 | // except that the aforementioned are allowed in unevaluated |
| 2988 | // expressions. Everything else falls under the |
| 2989 | // "may accept other forms of constant expressions" exception. |
| 2990 | // (We never end up here for C++, so the constant expression |
| 2991 | // rules there don't matter.) |
Chris Lattner | 111c2ee | 2009-02-24 21:54:33 +0000 | [diff] [blame] | 2992 | if (Init->isConstantInitializer(Context)) |
Eli Friedman | 578a972 | 2009-02-22 06:45:27 +0000 | [diff] [blame] | 2993 | return false; |
Eli Friedman | 2129828 | 2009-02-26 04:47:58 +0000 | [diff] [blame] | 2994 | Diag(Init->getExprLoc(), diag::err_init_element_not_constant) |
| 2995 | << Init->getSourceRange(); |
Eli Friedman | c594b32 | 2008-05-20 13:48:25 +0000 | [diff] [blame] | 2996 | return true; |
Steve Naroff | d0091aa | 2008-01-10 22:15:12 +0000 | [diff] [blame] | 2997 | } |
| 2998 | |
Anders Carlsson | 9abf2ae | 2009-08-16 05:13:48 +0000 | [diff] [blame^] | 2999 | void Sema::AddInitializerToDecl(DeclPtrTy dcl, ExprArg init) { |
| 3000 | AddInitializerToDecl(dcl, move(init), /*DirectInit=*/false); |
Douglas Gregor | 09f41cf | 2009-01-14 15:45:31 +0000 | [diff] [blame] | 3001 | } |
| 3002 | |
| 3003 | /// AddInitializerToDecl - Adds the initializer Init to the |
| 3004 | /// declaration dcl. If DirectInit is true, this is C++ direct |
| 3005 | /// initialization rather than copy initialization. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 3006 | void Sema::AddInitializerToDecl(DeclPtrTy dcl, ExprArg init, bool DirectInit) { |
| 3007 | Decl *RealDecl = dcl.getAs<Decl>(); |
Chris Lattner | 9a11b9a | 2007-10-19 20:10:30 +0000 | [diff] [blame] | 3008 | // If there is no declaration, there was an error parsing it. Just ignore |
| 3009 | // the initializer. |
Eli Friedman | 3b8a36a | 2009-02-27 04:17:12 +0000 | [diff] [blame] | 3010 | if (RealDecl == 0) |
Chris Lattner | 9a11b9a | 2007-10-19 20:10:30 +0000 | [diff] [blame] | 3011 | return; |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 3012 | |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 3013 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(RealDecl)) { |
| 3014 | // With declarators parsed the way they are, the parser cannot |
| 3015 | // distinguish between a normal initializer and a pure-specifier. |
| 3016 | // Thus this grotesque test. |
| 3017 | IntegerLiteral *IL; |
| 3018 | Expr *Init = static_cast<Expr *>(init.get()); |
| 3019 | if ((IL = dyn_cast<IntegerLiteral>(Init)) && IL->getValue() == 0 && |
| 3020 | Context.getCanonicalType(IL->getType()) == Context.IntTy) { |
Anders Carlsson | 77b7f1d | 2009-05-14 22:15:41 +0000 | [diff] [blame] | 3021 | if (Method->isVirtualAsWritten()) { |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 3022 | Method->setPure(); |
Anders Carlsson | 67e4dd2 | 2009-03-22 01:52:17 +0000 | [diff] [blame] | 3023 | |
| 3024 | // A class is abstract if at least one function is pure virtual. |
| 3025 | cast<CXXRecordDecl>(CurContext)->setAbstract(true); |
Douglas Gregor | 3329756 | 2009-03-27 04:38:56 +0000 | [diff] [blame] | 3026 | } else if (!Method->isInvalidDecl()) { |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 3027 | Diag(Method->getLocation(), diag::err_non_virtual_pure) |
| 3028 | << Method->getDeclName() << Init->getSourceRange(); |
| 3029 | Method->setInvalidDecl(); |
| 3030 | } |
| 3031 | } else { |
| 3032 | Diag(Method->getLocation(), diag::err_member_function_initialization) |
| 3033 | << Method->getDeclName() << Init->getSourceRange(); |
| 3034 | Method->setInvalidDecl(); |
| 3035 | } |
| 3036 | return; |
| 3037 | } |
| 3038 | |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 3039 | VarDecl *VDecl = dyn_cast<VarDecl>(RealDecl); |
| 3040 | if (!VDecl) { |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 3041 | if (getLangOptions().CPlusPlus && |
| 3042 | RealDecl->getLexicalDeclContext()->isRecord() && |
| 3043 | isa<NamedDecl>(RealDecl)) |
| 3044 | Diag(RealDecl->getLocation(), diag::err_member_initialization) |
| 3045 | << cast<NamedDecl>(RealDecl)->getDeclName(); |
| 3046 | else |
| 3047 | Diag(RealDecl->getLocation(), diag::err_illegal_initializer); |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 3048 | RealDecl->setInvalidDecl(); |
| 3049 | return; |
Eli Friedman | 3b8a36a | 2009-02-27 04:17:12 +0000 | [diff] [blame] | 3050 | } |
| 3051 | |
Eli Friedman | a31feca | 2009-04-13 21:28:54 +0000 | [diff] [blame] | 3052 | if (!VDecl->getType()->isArrayType() && |
| 3053 | RequireCompleteType(VDecl->getLocation(), VDecl->getType(), |
| 3054 | diag::err_typecheck_decl_incomplete_type)) { |
| 3055 | RealDecl->setInvalidDecl(); |
| 3056 | return; |
| 3057 | } |
| 3058 | |
Douglas Gregor | 275a369 | 2009-03-10 23:43:53 +0000 | [diff] [blame] | 3059 | const VarDecl *Def = 0; |
| 3060 | if (VDecl->getDefinition(Def)) { |
| 3061 | Diag(VDecl->getLocation(), diag::err_redefinition) |
| 3062 | << VDecl->getDeclName(); |
| 3063 | Diag(Def->getLocation(), diag::note_previous_definition); |
| 3064 | VDecl->setInvalidDecl(); |
| 3065 | return; |
| 3066 | } |
| 3067 | |
Eli Friedman | 3b8a36a | 2009-02-27 04:17:12 +0000 | [diff] [blame] | 3068 | // Take ownership of the expression, now that we're sure we have somewhere |
| 3069 | // to put it. |
Anders Carlsson | f1b1d59 | 2009-05-01 19:30:39 +0000 | [diff] [blame] | 3070 | Expr *Init = init.takeAs<Expr>(); |
Eli Friedman | 3b8a36a | 2009-02-27 04:17:12 +0000 | [diff] [blame] | 3071 | assert(Init && "missing initializer"); |
| 3072 | |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 3073 | // Get the decls type and save a reference for later, since |
Steve Naroff | d0091aa | 2008-01-10 22:15:12 +0000 | [diff] [blame] | 3074 | // CheckInitializerTypes may change it. |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 3075 | QualType DclT = VDecl->getType(), SavT = DclT; |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 3076 | if (VDecl->isBlockVarDecl()) { |
Daniel Dunbar | 5466c7b | 2009-04-14 02:25:56 +0000 | [diff] [blame] | 3077 | if (VDecl->hasExternalStorage()) { // C99 6.7.8p5 |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 3078 | Diag(VDecl->getLocation(), diag::err_block_extern_cant_init); |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 3079 | VDecl->setInvalidDecl(); |
| 3080 | } else if (!VDecl->isInvalidDecl()) { |
Douglas Gregor | f03d7c7 | 2008-11-05 15:29:30 +0000 | [diff] [blame] | 3081 | if (CheckInitializerTypes(Init, DclT, VDecl->getLocation(), |
Anders Carlsson | 0f5f2c6 | 2009-05-30 20:41:30 +0000 | [diff] [blame] | 3082 | VDecl->getDeclName(), DirectInit)) |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 3083 | VDecl->setInvalidDecl(); |
Anders Carlsson | c5eb731 | 2008-08-22 05:00:02 +0000 | [diff] [blame] | 3084 | |
| 3085 | // C++ 3.6.2p2, allow dynamic initialization of static initializers. |
Eli Friedman | da15323 | 2009-02-20 01:34:21 +0000 | [diff] [blame] | 3086 | // Don't check invalid declarations to avoid emitting useless diagnostics. |
| 3087 | if (!getLangOptions().CPlusPlus && !VDecl->isInvalidDecl()) { |
Daniel Dunbar | 5466c7b | 2009-04-14 02:25:56 +0000 | [diff] [blame] | 3088 | if (VDecl->getStorageClass() == VarDecl::Static) // C99 6.7.8p4. |
Anders Carlsson | c5eb731 | 2008-08-22 05:00:02 +0000 | [diff] [blame] | 3089 | CheckForConstantInitializer(Init, DclT); |
| 3090 | } |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 3091 | } |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 3092 | } else if (VDecl->isStaticDataMember() && |
| 3093 | VDecl->getLexicalDeclContext()->isRecord()) { |
| 3094 | // This is an in-class initialization for a static data member, e.g., |
| 3095 | // |
| 3096 | // struct S { |
| 3097 | // static const int value = 17; |
| 3098 | // }; |
| 3099 | |
| 3100 | // Attach the initializer |
Douglas Gregor | 78d1583 | 2009-05-26 18:54:04 +0000 | [diff] [blame] | 3101 | VDecl->setInit(Context, Init); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 3102 | |
| 3103 | // C++ [class.mem]p4: |
| 3104 | // A member-declarator can contain a constant-initializer only |
| 3105 | // if it declares a static member (9.4) of const integral or |
| 3106 | // const enumeration type, see 9.4.2. |
| 3107 | QualType T = VDecl->getType(); |
| 3108 | if (!T->isDependentType() && |
| 3109 | (!Context.getCanonicalType(T).isConstQualified() || |
| 3110 | !T->isIntegralType())) { |
| 3111 | Diag(VDecl->getLocation(), diag::err_member_initialization) |
| 3112 | << VDecl->getDeclName() << Init->getSourceRange(); |
| 3113 | VDecl->setInvalidDecl(); |
| 3114 | } else { |
| 3115 | // C++ [class.static.data]p4: |
| 3116 | // If a static data member is of const integral or const |
| 3117 | // enumeration type, its declaration in the class definition |
| 3118 | // can specify a constant-initializer which shall be an |
| 3119 | // integral constant expression (5.19). |
| 3120 | if (!Init->isTypeDependent() && |
| 3121 | !Init->getType()->isIntegralType()) { |
| 3122 | // We have a non-dependent, non-integral or enumeration type. |
| 3123 | Diag(Init->getSourceRange().getBegin(), |
| 3124 | diag::err_in_class_initializer_non_integral_type) |
| 3125 | << Init->getType() << Init->getSourceRange(); |
| 3126 | VDecl->setInvalidDecl(); |
| 3127 | } else if (!Init->isTypeDependent() && !Init->isValueDependent()) { |
| 3128 | // Check whether the expression is a constant expression. |
| 3129 | llvm::APSInt Value; |
| 3130 | SourceLocation Loc; |
| 3131 | if (!Init->isIntegerConstantExpr(Value, Context, &Loc)) { |
| 3132 | Diag(Loc, diag::err_in_class_initializer_non_constant) |
| 3133 | << Init->getSourceRange(); |
| 3134 | VDecl->setInvalidDecl(); |
Douglas Gregor | 3d7a12a | 2009-03-25 23:32:15 +0000 | [diff] [blame] | 3135 | } else if (!VDecl->getType()->isDependentType()) |
| 3136 | ImpCastExprToType(Init, VDecl->getType()); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 3137 | } |
| 3138 | } |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 3139 | } else if (VDecl->isFileVarDecl()) { |
Steve Naroff | ee3899e | 2009-04-15 15:20:03 +0000 | [diff] [blame] | 3140 | if (VDecl->getStorageClass() == VarDecl::Extern) |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 3141 | Diag(VDecl->getLocation(), diag::warn_extern_init); |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 3142 | if (!VDecl->isInvalidDecl()) |
Douglas Gregor | f03d7c7 | 2008-11-05 15:29:30 +0000 | [diff] [blame] | 3143 | if (CheckInitializerTypes(Init, DclT, VDecl->getLocation(), |
Douglas Gregor | 09f41cf | 2009-01-14 15:45:31 +0000 | [diff] [blame] | 3144 | VDecl->getDeclName(), DirectInit)) |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 3145 | VDecl->setInvalidDecl(); |
Steve Naroff | d0091aa | 2008-01-10 22:15:12 +0000 | [diff] [blame] | 3146 | |
Anders Carlsson | c5eb731 | 2008-08-22 05:00:02 +0000 | [diff] [blame] | 3147 | // C++ 3.6.2p2, allow dynamic initialization of static initializers. |
Eli Friedman | da15323 | 2009-02-20 01:34:21 +0000 | [diff] [blame] | 3148 | // Don't check invalid declarations to avoid emitting useless diagnostics. |
| 3149 | if (!getLangOptions().CPlusPlus && !VDecl->isInvalidDecl()) { |
Anders Carlsson | c5eb731 | 2008-08-22 05:00:02 +0000 | [diff] [blame] | 3150 | // C99 6.7.8p4. All file scoped initializers need to be constant. |
| 3151 | CheckForConstantInitializer(Init, DclT); |
| 3152 | } |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 3153 | } |
| 3154 | // If the type changed, it means we had an incomplete type that was |
| 3155 | // completed by the initializer. For example: |
| 3156 | // int ary[] = { 1, 3, 5 }; |
| 3157 | // "ary" transitions from a VariableArrayType to a ConstantArrayType. |
Christopher Lamb | 48b1239 | 2007-11-29 19:09:19 +0000 | [diff] [blame] | 3158 | if (!VDecl->isInvalidDecl() && (DclT != SavT)) { |
Steve Naroff | 410e3e2 | 2007-09-12 20:13:48 +0000 | [diff] [blame] | 3159 | VDecl->setType(DclT); |
Christopher Lamb | 48b1239 | 2007-11-29 19:09:19 +0000 | [diff] [blame] | 3160 | Init->setType(DclT); |
| 3161 | } |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 3162 | |
Anders Carlsson | 9abf2ae | 2009-08-16 05:13:48 +0000 | [diff] [blame^] | 3163 | Init = MaybeCreateCXXExprWithTemporaries(Init, |
| 3164 | /*ShouldDestroyTemporaries=*/true); |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 3165 | // Attach the initializer to the decl. |
Douglas Gregor | 78d1583 | 2009-05-26 18:54:04 +0000 | [diff] [blame] | 3166 | VDecl->setInit(Context, Init); |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 3167 | |
| 3168 | // If the previous declaration of VDecl was a tentative definition, |
| 3169 | // remove it from the set of tentative definitions. |
| 3170 | if (VDecl->getPreviousDeclaration() && |
| 3171 | VDecl->getPreviousDeclaration()->isTentativeDefinition(Context)) { |
| 3172 | llvm::DenseMap<DeclarationName, VarDecl *>::iterator Pos |
| 3173 | = TentativeDefinitions.find(VDecl->getDeclName()); |
| 3174 | assert(Pos != TentativeDefinitions.end() && |
| 3175 | "Unrecorded tentative definition?"); |
| 3176 | TentativeDefinitions.erase(Pos); |
| 3177 | } |
| 3178 | |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 3179 | return; |
| 3180 | } |
| 3181 | |
Anders Carlsson | 6a75cd9 | 2009-07-11 00:34:39 +0000 | [diff] [blame] | 3182 | void Sema::ActOnUninitializedDecl(DeclPtrTy dcl, |
| 3183 | bool TypeContainsUndeducedAuto) { |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 3184 | Decl *RealDecl = dcl.getAs<Decl>(); |
Douglas Gregor | 27c8dc0 | 2008-10-29 00:13:59 +0000 | [diff] [blame] | 3185 | |
Argyrios Kyrtzidis | 48c2e90 | 2008-11-07 13:01:22 +0000 | [diff] [blame] | 3186 | // If there is no declaration, there was an error parsing it. Just ignore it. |
| 3187 | if (RealDecl == 0) |
| 3188 | return; |
| 3189 | |
Douglas Gregor | 27c8dc0 | 2008-10-29 00:13:59 +0000 | [diff] [blame] | 3190 | if (VarDecl *Var = dyn_cast<VarDecl>(RealDecl)) { |
| 3191 | QualType Type = Var->getType(); |
Douglas Gregor | b6c8c8b | 2009-04-21 17:11:58 +0000 | [diff] [blame] | 3192 | |
| 3193 | // Record tentative definitions. |
| 3194 | if (Var->isTentativeDefinition(Context)) |
| 3195 | TentativeDefinitions[Var->getDeclName()] = Var; |
| 3196 | |
Douglas Gregor | 27c8dc0 | 2008-10-29 00:13:59 +0000 | [diff] [blame] | 3197 | // C++ [dcl.init.ref]p3: |
| 3198 | // The initializer can be omitted for a reference only in a |
| 3199 | // parameter declaration (8.3.5), in the declaration of a |
| 3200 | // function return type, in the declaration of a class member |
| 3201 | // within its class declaration (9.2), and where the extern |
| 3202 | // specifier is explicitly used. |
Daniel Dunbar | 5466c7b | 2009-04-14 02:25:56 +0000 | [diff] [blame] | 3203 | if (Type->isReferenceType() && !Var->hasExternalStorage()) { |
Chris Lattner | d3a94e2 | 2008-11-20 06:06:08 +0000 | [diff] [blame] | 3204 | Diag(Var->getLocation(), diag::err_reference_var_requires_init) |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 3205 | << Var->getDeclName() |
| 3206 | << SourceRange(Var->getLocation(), Var->getLocation()); |
Douglas Gregor | 18fe568 | 2008-11-03 20:45:27 +0000 | [diff] [blame] | 3207 | Var->setInvalidDecl(); |
| 3208 | return; |
| 3209 | } |
| 3210 | |
Anders Carlsson | 6a75cd9 | 2009-07-11 00:34:39 +0000 | [diff] [blame] | 3211 | // C++0x [dcl.spec.auto]p3 |
| 3212 | if (TypeContainsUndeducedAuto) { |
| 3213 | Diag(Var->getLocation(), diag::err_auto_var_requires_init) |
| 3214 | << Var->getDeclName() << Type; |
| 3215 | Var->setInvalidDecl(); |
| 3216 | return; |
| 3217 | } |
| 3218 | |
Douglas Gregor | 18fe568 | 2008-11-03 20:45:27 +0000 | [diff] [blame] | 3219 | // C++ [dcl.init]p9: |
| 3220 | // |
| 3221 | // If no initializer is specified for an object, and the object |
| 3222 | // is of (possibly cv-qualified) non-POD class type (or array |
| 3223 | // thereof), the object shall be default-initialized; if the |
| 3224 | // object is of const-qualified type, the underlying class type |
| 3225 | // shall have a user-declared default constructor. |
| 3226 | if (getLangOptions().CPlusPlus) { |
| 3227 | QualType InitType = Type; |
| 3228 | if (const ArrayType *Array = Context.getAsArrayType(Type)) |
| 3229 | InitType = Array->getElementType(); |
Anders Carlsson | 425bfde | 2009-05-16 22:05:23 +0000 | [diff] [blame] | 3230 | if ((!Var->hasExternalStorage() && !Var->isExternC(Context)) && |
Douglas Gregor | 8e92bf3 | 2009-05-29 14:25:00 +0000 | [diff] [blame] | 3231 | InitType->isRecordType() && !InitType->isDependentType()) { |
Anders Carlsson | 930e8d0 | 2009-04-16 23:50:50 +0000 | [diff] [blame] | 3232 | CXXRecordDecl *RD = |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 3233 | cast<CXXRecordDecl>(InitType->getAs<RecordType>()->getDecl()); |
Anders Carlsson | 930e8d0 | 2009-04-16 23:50:50 +0000 | [diff] [blame] | 3234 | CXXConstructorDecl *Constructor = 0; |
Douglas Gregor | 86447ec | 2009-03-09 16:13:40 +0000 | [diff] [blame] | 3235 | if (!RequireCompleteType(Var->getLocation(), InitType, |
Douglas Gregor | 2943aed | 2009-03-03 04:44:36 +0000 | [diff] [blame] | 3236 | diag::err_invalid_incomplete_type_use)) |
| 3237 | Constructor |
| 3238 | = PerformInitializationByConstructor(InitType, 0, 0, |
| 3239 | Var->getLocation(), |
Douglas Gregor | f03d7c7 | 2008-11-05 15:29:30 +0000 | [diff] [blame] | 3240 | SourceRange(Var->getLocation(), |
| 3241 | Var->getLocation()), |
Douglas Gregor | 2943aed | 2009-03-03 04:44:36 +0000 | [diff] [blame] | 3242 | Var->getDeclName(), |
| 3243 | IK_Default); |
Douglas Gregor | 18fe568 | 2008-11-03 20:45:27 +0000 | [diff] [blame] | 3244 | if (!Constructor) |
| 3245 | Var->setInvalidDecl(); |
Fariborz Jahanian | 8d2b356 | 2009-06-26 23:49:16 +0000 | [diff] [blame] | 3246 | else { |
Anders Carlsson | 3b2e16b | 2009-08-08 21:45:14 +0000 | [diff] [blame] | 3247 | if (!RD->hasTrivialConstructor() || !RD->hasTrivialDestructor()) |
Fariborz Jahanian | f8dcb86 | 2009-06-19 19:55:27 +0000 | [diff] [blame] | 3248 | InitializeVarWithConstructor(Var, Constructor, InitType, 0, 0); |
Fariborz Jahanian | a83f7ed | 2009-08-03 19:13:25 +0000 | [diff] [blame] | 3249 | FinalizeVarWithDestructor(Var, InitType); |
Fariborz Jahanian | 8d2b356 | 2009-06-26 23:49:16 +0000 | [diff] [blame] | 3250 | } |
Douglas Gregor | 18fe568 | 2008-11-03 20:45:27 +0000 | [diff] [blame] | 3251 | } |
| 3252 | } |
Douglas Gregor | 27c8dc0 | 2008-10-29 00:13:59 +0000 | [diff] [blame] | 3253 | |
Douglas Gregor | 818ce48 | 2008-10-29 13:50:18 +0000 | [diff] [blame] | 3254 | #if 0 |
| 3255 | // FIXME: Temporarily disabled because we are not properly parsing |
| 3256 | // linkage specifications on declarations, e.g., |
| 3257 | // |
| 3258 | // extern "C" const CGPoint CGPointerZero; |
| 3259 | // |
Douglas Gregor | 27c8dc0 | 2008-10-29 00:13:59 +0000 | [diff] [blame] | 3260 | // C++ [dcl.init]p9: |
| 3261 | // |
| 3262 | // If no initializer is specified for an object, and the |
| 3263 | // object is of (possibly cv-qualified) non-POD class type (or |
| 3264 | // array thereof), the object shall be default-initialized; if |
| 3265 | // the object is of const-qualified type, the underlying class |
| 3266 | // type shall have a user-declared default |
| 3267 | // constructor. Otherwise, if no initializer is specified for |
| 3268 | // an object, the object and its subobjects, if any, have an |
| 3269 | // indeterminate initial value; if the object or any of its |
| 3270 | // subobjects are of const-qualified type, the program is |
| 3271 | // ill-formed. |
| 3272 | // |
| 3273 | // This isn't technically an error in C, so we don't diagnose it. |
| 3274 | // |
| 3275 | // FIXME: Actually perform the POD/user-defined default |
| 3276 | // constructor check. |
| 3277 | if (getLangOptions().CPlusPlus && |
Douglas Gregor | 818ce48 | 2008-10-29 13:50:18 +0000 | [diff] [blame] | 3278 | Context.getCanonicalType(Type).isConstQualified() && |
Daniel Dunbar | 5466c7b | 2009-04-14 02:25:56 +0000 | [diff] [blame] | 3279 | !Var->hasExternalStorage()) |
Chris Lattner | f3a41af | 2008-11-20 06:38:18 +0000 | [diff] [blame] | 3280 | Diag(Var->getLocation(), diag::err_const_var_requires_init) |
| 3281 | << Var->getName() |
| 3282 | << SourceRange(Var->getLocation(), Var->getLocation()); |
Douglas Gregor | 818ce48 | 2008-10-29 13:50:18 +0000 | [diff] [blame] | 3283 | #endif |
Douglas Gregor | 27c8dc0 | 2008-10-29 00:13:59 +0000 | [diff] [blame] | 3284 | } |
| 3285 | } |
| 3286 | |
Eli Friedman | c1dc653 | 2009-05-29 01:49:24 +0000 | [diff] [blame] | 3287 | Sema::DeclGroupPtrTy Sema::FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, |
| 3288 | DeclPtrTy *Group, |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 3289 | unsigned NumDecls) { |
| 3290 | llvm::SmallVector<Decl*, 8> Decls; |
Eli Friedman | c1dc653 | 2009-05-29 01:49:24 +0000 | [diff] [blame] | 3291 | |
| 3292 | if (DS.isTypeSpecOwned()) |
| 3293 | Decls.push_back((Decl*)DS.getTypeRep()); |
| 3294 | |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 3295 | for (unsigned i = 0; i != NumDecls; ++i) |
| 3296 | if (Decl *D = Group[i].getAs<Decl>()) |
| 3297 | Decls.push_back(D); |
| 3298 | |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 3299 | // Perform semantic analysis that depends on having fully processed both |
| 3300 | // the declarator and initializer. |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 3301 | for (unsigned i = 0, e = Decls.size(); i != e; ++i) { |
| 3302 | VarDecl *IDecl = dyn_cast<VarDecl>(Decls[i]); |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 3303 | if (!IDecl) |
| 3304 | continue; |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 3305 | QualType T = IDecl->getType(); |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 3306 | |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 3307 | // Block scope. C99 6.7p7: If an identifier for an object is declared with |
| 3308 | // no linkage (C99 6.2.2p6), the type for the object shall be complete... |
Daniel Dunbar | 5466c7b | 2009-04-14 02:25:56 +0000 | [diff] [blame] | 3309 | if (IDecl->isBlockVarDecl() && !IDecl->hasExternalStorage()) { |
Douglas Gregor | 4ec339f | 2009-01-19 19:26:10 +0000 | [diff] [blame] | 3310 | if (!IDecl->isInvalidDecl() && |
Douglas Gregor | 86447ec | 2009-03-09 16:13:40 +0000 | [diff] [blame] | 3311 | RequireCompleteType(IDecl->getLocation(), T, |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 3312 | diag::err_typecheck_decl_incomplete_type)) |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 3313 | IDecl->setInvalidDecl(); |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 3314 | } |
Douglas Gregor | ec8b59f | 2009-07-20 18:46:59 +0000 | [diff] [blame] | 3315 | // File scope. C99 6.9.2p2: A declaration of an identifier for an |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 3316 | // object that has file scope without an initializer, and without a |
| 3317 | // storage-class specifier or with the storage-class specifier "static", |
| 3318 | // constitutes a tentative definition. Note: A tentative definition with |
| 3319 | // external linkage is valid (C99 6.2.2p5). |
Douglas Gregor | ec8b59f | 2009-07-20 18:46:59 +0000 | [diff] [blame] | 3320 | if (IDecl->isTentativeDefinition(Context) && !IDecl->isInvalidDecl()) { |
| 3321 | if (const IncompleteArrayType *ArrayT |
| 3322 | = Context.getAsIncompleteArrayType(T)) { |
| 3323 | if (RequireCompleteType(IDecl->getLocation(), |
| 3324 | ArrayT->getElementType(), |
| 3325 | diag::err_illegal_decl_array_incomplete_type)) |
| 3326 | IDecl->setInvalidDecl(); |
Mike Stump | ac5fc7c | 2009-08-04 21:02:39 +0000 | [diff] [blame] | 3327 | } else if (IDecl->getStorageClass() == VarDecl::Static) { |
Steve Naroff | 9a75f8a | 2008-01-18 20:40:52 +0000 | [diff] [blame] | 3328 | // C99 6.9.2p3: If the declaration of an identifier for an object is |
Douglas Gregor | ec8b59f | 2009-07-20 18:46:59 +0000 | [diff] [blame] | 3329 | // a tentative definition and has internal linkage (C99 6.2.2p3), the |
Steve Naroff | 9a75f8a | 2008-01-18 20:40:52 +0000 | [diff] [blame] | 3330 | // declared type shall not be an incomplete type. |
Douglas Gregor | ec8b59f | 2009-07-20 18:46:59 +0000 | [diff] [blame] | 3331 | // NOTE: code such as the following |
| 3332 | // static struct s; |
| 3333 | // struct s { int a; }; |
| 3334 | // is accepted by gcc. Hence here we issue a warning instead of |
| 3335 | // an error and we do not invalidate the static declaration. |
| 3336 | // NOTE: to avoid multiple warnings, only check the first declaration. |
| 3337 | if (IDecl->getPreviousDeclaration() == 0) |
| 3338 | RequireCompleteType(IDecl->getLocation(), T, |
| 3339 | diag::ext_typecheck_decl_incomplete_type); |
Douglas Gregor | a03aca8 | 2009-03-10 21:58:27 +0000 | [diff] [blame] | 3340 | } |
Steve Naroff | bb20469 | 2007-09-12 14:07:44 +0000 | [diff] [blame] | 3341 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3342 | } |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 3343 | return DeclGroupPtrTy::make(DeclGroupRef::Create(Context, |
Jay Foad | beaaccd | 2009-05-21 09:52:38 +0000 | [diff] [blame] | 3344 | Decls.data(), Decls.size())); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3345 | } |
Steve Naroff | e1223f7 | 2007-08-28 03:03:08 +0000 | [diff] [blame] | 3346 | |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 3347 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3348 | /// ActOnParamDeclarator - Called from Parser::ParseFunctionDeclarator() |
| 3349 | /// to introduce parameters into function prototype scope. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 3350 | Sema::DeclPtrTy |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3351 | Sema::ActOnParamDeclarator(Scope *S, Declarator &D) { |
Chris Lattner | 985abd9 | 2008-06-26 06:49:43 +0000 | [diff] [blame] | 3352 | const DeclSpec &DS = D.getDeclSpec(); |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 3353 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3354 | // Verify C99 6.7.5.3p2: The only SCS allowed is 'register'. |
Daniel Dunbar | 33ad012 | 2008-09-03 21:54:21 +0000 | [diff] [blame] | 3355 | VarDecl::StorageClass StorageClass = VarDecl::None; |
| 3356 | if (DS.getStorageClassSpec() == DeclSpec::SCS_register) { |
| 3357 | StorageClass = VarDecl::Register; |
| 3358 | } else if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified) { |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3359 | Diag(DS.getStorageClassSpecLoc(), |
| 3360 | diag::err_invalid_storage_class_in_func_decl); |
Chris Lattner | 985abd9 | 2008-06-26 06:49:43 +0000 | [diff] [blame] | 3361 | D.getMutableDeclSpec().ClearStorageClassSpecs(); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3362 | } |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 3363 | |
| 3364 | if (D.getDeclSpec().isThreadSpecified()) |
| 3365 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_invalid_thread); |
| 3366 | |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 3367 | DiagnoseFunctionSpecifiers(D); |
| 3368 | |
Douglas Gregor | 6d6eb57 | 2008-05-07 04:49:29 +0000 | [diff] [blame] | 3369 | // Check that there are no default arguments inside the type of this |
| 3370 | // parameter (C++ only). |
| 3371 | if (getLangOptions().CPlusPlus) |
| 3372 | CheckExtraCXXDefaultArguments(D); |
| 3373 | |
Douglas Gregor | 402abb5 | 2009-05-28 23:31:59 +0000 | [diff] [blame] | 3374 | TagDecl *OwnedDecl = 0; |
| 3375 | QualType parmDeclType = GetTypeForDeclarator(D, S, /*Skip=*/0, &OwnedDecl); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3376 | |
Douglas Gregor | 402abb5 | 2009-05-28 23:31:59 +0000 | [diff] [blame] | 3377 | if (getLangOptions().CPlusPlus && OwnedDecl && OwnedDecl->isDefinition()) { |
| 3378 | // C++ [dcl.fct]p6: |
| 3379 | // Types shall not be defined in return or parameter types. |
| 3380 | Diag(OwnedDecl->getLocation(), diag::err_type_defined_in_param_type) |
| 3381 | << Context.getTypeDeclType(OwnedDecl); |
| 3382 | } |
| 3383 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3384 | // TODO: CHECK FOR CONFLICTS, multiple decls with same name in one scope. |
| 3385 | // Can this happen for params? We already checked that they don't conflict |
| 3386 | // among each other. Here they can only shadow globals, which is ok. |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3387 | IdentifierInfo *II = D.getIdentifier(); |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 3388 | if (II) { |
Douglas Gregor | 47b9a1c | 2009-02-04 17:27:36 +0000 | [diff] [blame] | 3389 | if (NamedDecl *PrevDecl = LookupName(S, II, LookupOrdinaryName)) { |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 3390 | if (PrevDecl->isTemplateParameter()) { |
| 3391 | // Maybe we will complain about the shadowed template parameter. |
| 3392 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl); |
| 3393 | // Just pretend that we didn't see the previous declaration. |
| 3394 | PrevDecl = 0; |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 3395 | } else if (S->isDeclScope(DeclPtrTy::make(PrevDecl))) { |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 3396 | Diag(D.getIdentifierLoc(), diag::err_param_redefinition) << II; |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3397 | |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 3398 | // Recover by removing the name |
| 3399 | II = 0; |
| 3400 | D.SetIdentifier(0, D.getIdentifierLoc()); |
| 3401 | } |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3402 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3403 | } |
Steve Naroff | 6a9f3e3 | 2007-08-07 22:44:21 +0000 | [diff] [blame] | 3404 | |
Anders Carlsson | 11f21a0 | 2009-03-23 19:10:31 +0000 | [diff] [blame] | 3405 | // Parameters can not be abstract class types. |
Anders Carlsson | 8211eff | 2009-03-24 01:19:16 +0000 | [diff] [blame] | 3406 | // For record types, this is done by the AbstractClassUsageDiagnoser once |
| 3407 | // the class has been completely parsed. |
| 3408 | if (!CurContext->isRecord() && |
| 3409 | RequireNonAbstractType(D.getIdentifierLoc(), parmDeclType, |
Anders Carlsson | 11f21a0 | 2009-03-23 19:10:31 +0000 | [diff] [blame] | 3410 | diag::err_abstract_type_in_decl, |
Anders Carlsson | 8211eff | 2009-03-24 01:19:16 +0000 | [diff] [blame] | 3411 | AbstractParamType)) |
Anders Carlsson | 11f21a0 | 2009-03-23 19:10:31 +0000 | [diff] [blame] | 3412 | D.setInvalidType(true); |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 3413 | |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3414 | QualType T = adjustParameterType(parmDeclType); |
| 3415 | |
| 3416 | ParmVarDecl *New; |
| 3417 | if (T == parmDeclType) // parameter type did not need adjustment |
| 3418 | New = ParmVarDecl::Create(Context, CurContext, |
| 3419 | D.getIdentifierLoc(), II, |
| 3420 | parmDeclType, StorageClass, |
| 3421 | 0); |
| 3422 | else // keep track of both the adjusted and unadjusted types |
| 3423 | New = OriginalParmVarDecl::Create(Context, CurContext, |
| 3424 | D.getIdentifierLoc(), II, T, |
| 3425 | parmDeclType, StorageClass, 0); |
Anders Carlsson | f78915f | 2008-02-15 07:04:12 +0000 | [diff] [blame] | 3426 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3427 | if (D.isInvalidType()) |
Steve Naroff | 53a3234 | 2007-08-28 18:45:29 +0000 | [diff] [blame] | 3428 | New->setInvalidDecl(); |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 3429 | |
Steve Naroff | ccef371 | 2009-02-20 22:59:16 +0000 | [diff] [blame] | 3430 | // Parameter declarators cannot be interface types. All ObjC objects are |
| 3431 | // passed by reference. |
Douglas Gregor | 2dc0e64 | 2009-03-23 23:06:20 +0000 | [diff] [blame] | 3432 | if (T->isObjCInterfaceType()) { |
Chris Lattner | 2dd979f | 2009-04-11 19:08:56 +0000 | [diff] [blame] | 3433 | Diag(D.getIdentifierLoc(), |
| 3434 | diag::err_object_cannot_be_passed_returned_by_value) << 1 << T; |
Steve Naroff | ccef371 | 2009-02-20 22:59:16 +0000 | [diff] [blame] | 3435 | New->setInvalidDecl(); |
| 3436 | } |
Chris Lattner | f97e8fa | 2009-04-11 19:34:56 +0000 | [diff] [blame] | 3437 | |
| 3438 | // Parameter declarators cannot be qualified (C++ [dcl.meaning]p1). |
| 3439 | if (D.getCXXScopeSpec().isSet()) { |
| 3440 | Diag(D.getIdentifierLoc(), diag::err_qualified_param_declarator) |
| 3441 | << D.getCXXScopeSpec().getRange(); |
| 3442 | New->setInvalidDecl(); |
| 3443 | } |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 3444 | |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 3445 | // Add the parameter declaration into this scope. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 3446 | S->AddDecl(DeclPtrTy::make(New)); |
Argyrios Kyrtzidis | 87f3ff0 | 2008-04-12 00:47:19 +0000 | [diff] [blame] | 3447 | if (II) |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 3448 | IdResolver.AddDecl(New); |
Nate Begeman | b7894b5 | 2008-02-17 21:20:31 +0000 | [diff] [blame] | 3449 | |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 3450 | ProcessDeclAttributes(S, New, D); |
Mike Stump | ea000bf | 2009-04-30 00:19:40 +0000 | [diff] [blame] | 3451 | |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 3452 | if (New->hasAttr<BlocksAttr>()) { |
Mike Stump | ea000bf | 2009-04-30 00:19:40 +0000 | [diff] [blame] | 3453 | Diag(New->getLocation(), diag::err_block_on_nonlocal); |
| 3454 | } |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 3455 | return DeclPtrTy::make(New); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3456 | } |
Fariborz Jahanian | 306d68f | 2007-11-08 23:49:49 +0000 | [diff] [blame] | 3457 | |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 3458 | void Sema::ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, |
| 3459 | SourceLocation LocAfterDecls) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3460 | assert(D.getTypeObject(0).Kind == DeclaratorChunk::Function && |
| 3461 | "Not a function declarator!"); |
| 3462 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(0).Fun; |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3463 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3464 | // Verify 6.9.1p6: 'every identifier in the identifier list shall be declared' |
| 3465 | // for a K&R function. |
| 3466 | if (!FTI.hasPrototype) { |
Douglas Gregor | 2610348 | 2009-04-02 03:14:12 +0000 | [diff] [blame] | 3467 | for (int i = FTI.NumArgs; i != 0; /* decrement in loop */) { |
| 3468 | --i; |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3469 | if (FTI.ArgInfo[i].Param == 0) { |
Douglas Gregor | 2610348 | 2009-04-02 03:14:12 +0000 | [diff] [blame] | 3470 | std::string Code = " int "; |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 3471 | Code += FTI.ArgInfo[i].Ident->getName(); |
Douglas Gregor | 2610348 | 2009-04-02 03:14:12 +0000 | [diff] [blame] | 3472 | Code += ";\n"; |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 3473 | Diag(FTI.ArgInfo[i].IdentLoc, diag::ext_param_not_declared) |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 3474 | << FTI.ArgInfo[i].Ident |
| 3475 | << CodeModificationHint::CreateInsertion(LocAfterDecls, Code); |
| 3476 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3477 | // Implicitly declare the argument as type 'int' for lack of a better |
| 3478 | // type. |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3479 | DeclSpec DS; |
| 3480 | const char* PrevSpec; // unused |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 3481 | unsigned DiagID; // unused |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3482 | DS.SetTypeSpecType(DeclSpec::TST_int, FTI.ArgInfo[i].IdentLoc, |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 3483 | PrevSpec, DiagID); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3484 | Declarator ParamD(DS, Declarator::KNRTypeListContext); |
| 3485 | ParamD.SetIdentifier(FTI.ArgInfo[i].Ident, FTI.ArgInfo[i].IdentLoc); |
Douglas Gregor | be109b3 | 2009-01-23 16:23:13 +0000 | [diff] [blame] | 3486 | FTI.ArgInfo[i].Param = ActOnParamDeclarator(S, ParamD); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3487 | } |
| 3488 | } |
Douglas Gregor | be109b3 | 2009-01-23 16:23:13 +0000 | [diff] [blame] | 3489 | } |
| 3490 | } |
| 3491 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 3492 | Sema::DeclPtrTy Sema::ActOnStartOfFunctionDef(Scope *FnBodyScope, |
| 3493 | Declarator &D) { |
Douglas Gregor | be109b3 | 2009-01-23 16:23:13 +0000 | [diff] [blame] | 3494 | assert(getCurFunctionDecl() == 0 && "Function parsing confused"); |
| 3495 | assert(D.getTypeObject(0).Kind == DeclaratorChunk::Function && |
| 3496 | "Not a function declarator!"); |
| 3497 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(0).Fun; |
| 3498 | |
| 3499 | if (FTI.hasPrototype) { |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3500 | // FIXME: Diagnose arguments without names in C. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3501 | } |
| 3502 | |
Douglas Gregor | 584049d | 2008-12-15 23:53:10 +0000 | [diff] [blame] | 3503 | Scope *ParentScope = FnBodyScope->getParent(); |
Steve Naroff | adbbd0c | 2008-01-14 20:51:29 +0000 | [diff] [blame] | 3504 | |
Douglas Gregor | e542c86 | 2009-06-23 23:11:28 +0000 | [diff] [blame] | 3505 | DeclPtrTy DP = HandleDeclarator(ParentScope, D, |
| 3506 | MultiTemplateParamsArg(*this), |
| 3507 | /*IsFunctionDefinition=*/true); |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 3508 | return ActOnStartOfFunctionDef(FnBodyScope, DP); |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 3509 | } |
| 3510 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 3511 | Sema::DeclPtrTy Sema::ActOnStartOfFunctionDef(Scope *FnBodyScope, DeclPtrTy D) { |
Douglas Gregor | 52591bf | 2009-06-24 00:54:41 +0000 | [diff] [blame] | 3512 | if (!D) |
| 3513 | return D; |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 3514 | FunctionDecl *FD = cast<FunctionDecl>(D.getAs<Decl>()); |
Douglas Gregor | 6fc17ff | 2008-10-29 15:10:40 +0000 | [diff] [blame] | 3515 | |
Chris Lattner | 38c5ebd | 2009-04-19 05:21:20 +0000 | [diff] [blame] | 3516 | CurFunctionNeedsScopeChecking = false; |
| 3517 | |
Douglas Gregor | 6fc17ff | 2008-10-29 15:10:40 +0000 | [diff] [blame] | 3518 | // See if this is a redefinition. |
| 3519 | const FunctionDecl *Definition; |
Argyrios Kyrtzidis | 6fb0aee | 2009-06-30 02:35:26 +0000 | [diff] [blame] | 3520 | if (FD->getBody(Definition)) { |
Chris Lattner | 08631c5 | 2008-11-23 21:45:46 +0000 | [diff] [blame] | 3521 | Diag(FD->getLocation(), diag::err_redefinition) << FD->getDeclName(); |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 3522 | Diag(Definition->getLocation(), diag::note_previous_definition); |
Douglas Gregor | 6fc17ff | 2008-10-29 15:10:40 +0000 | [diff] [blame] | 3523 | } |
| 3524 | |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 3525 | // Builtin functions cannot be defined. |
| 3526 | if (unsigned BuiltinID = FD->getBuiltinID(Context)) { |
Douglas Gregor | 655753a | 2009-02-17 16:03:01 +0000 | [diff] [blame] | 3527 | if (!Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) { |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 3528 | Diag(FD->getLocation(), diag::err_builtin_definition) << FD; |
Douglas Gregor | 655753a | 2009-02-17 16:03:01 +0000 | [diff] [blame] | 3529 | FD->setInvalidDecl(); |
| 3530 | } |
Douglas Gregor | cda9c67 | 2009-02-16 17:45:42 +0000 | [diff] [blame] | 3531 | } |
| 3532 | |
Eli Friedman | 7f0f5dc | 2009-03-04 07:30:59 +0000 | [diff] [blame] | 3533 | // The return type of a function definition must be complete |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 3534 | // (C99 6.9.1p3, C++ [dcl.fct]p6). |
| 3535 | QualType ResultType = FD->getResultType(); |
| 3536 | if (!ResultType->isDependentType() && !ResultType->isVoidType() && |
Chris Lattner | 65e6a09 | 2009-04-29 05:12:23 +0000 | [diff] [blame] | 3537 | !FD->isInvalidDecl() && |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 3538 | RequireCompleteType(FD->getLocation(), ResultType, |
| 3539 | diag::err_func_def_incomplete_result)) |
Eli Friedman | 7f0f5dc | 2009-03-04 07:30:59 +0000 | [diff] [blame] | 3540 | FD->setInvalidDecl(); |
Eli Friedman | 7f0f5dc | 2009-03-04 07:30:59 +0000 | [diff] [blame] | 3541 | |
Douglas Gregor | 8499f3f | 2009-03-31 16:35:03 +0000 | [diff] [blame] | 3542 | // GNU warning -Wmissing-prototypes: |
| 3543 | // Warn if a global function is defined without a previous |
| 3544 | // prototype declaration. This warning is issued even if the |
| 3545 | // definition itself provides a prototype. The aim is to detect |
| 3546 | // global functions that fail to be declared in header files. |
Douglas Gregor | 2c2d9dc | 2009-04-08 15:21:36 +0000 | [diff] [blame] | 3547 | if (!FD->isInvalidDecl() && FD->isGlobal() && !isa<CXXMethodDecl>(FD) && |
John McCall | 07a5c22 | 2009-08-15 02:09:25 +0000 | [diff] [blame] | 3548 | !FD->isMain(Context)) { |
Douglas Gregor | 8499f3f | 2009-03-31 16:35:03 +0000 | [diff] [blame] | 3549 | bool MissingPrototype = true; |
| 3550 | for (const FunctionDecl *Prev = FD->getPreviousDeclaration(); |
| 3551 | Prev; Prev = Prev->getPreviousDeclaration()) { |
| 3552 | // Ignore any declarations that occur in function or method |
| 3553 | // scope, because they aren't visible from the header. |
| 3554 | if (Prev->getDeclContext()->isFunctionOrMethod()) |
| 3555 | continue; |
| 3556 | |
| 3557 | MissingPrototype = !Prev->getType()->isFunctionProtoType(); |
| 3558 | break; |
| 3559 | } |
| 3560 | |
| 3561 | if (MissingPrototype) |
| 3562 | Diag(FD->getLocation(), diag::warn_missing_prototype) << FD; |
| 3563 | } |
| 3564 | |
Douglas Gregor | e2c31ff | 2009-05-15 17:59:04 +0000 | [diff] [blame] | 3565 | if (FnBodyScope) |
| 3566 | PushDeclContext(FnBodyScope, FD); |
Anton Korobeynikov | 2f40270 | 2008-12-26 00:52:02 +0000 | [diff] [blame] | 3567 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3568 | // Check the validity of our function parameters |
| 3569 | CheckParmsForFunctionDef(FD); |
| 3570 | |
| 3571 | // Introduce our parameters into the function scope |
| 3572 | for (unsigned p = 0, NumParams = FD->getNumParams(); p < NumParams; ++p) { |
| 3573 | ParmVarDecl *Param = FD->getParamDecl(p); |
Douglas Gregor | a8cc8ce | 2009-01-09 18:51:29 +0000 | [diff] [blame] | 3574 | Param->setOwningFunction(FD); |
| 3575 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3576 | // If this has an identifier, add it to the scope stack. |
Douglas Gregor | e2c31ff | 2009-05-15 17:59:04 +0000 | [diff] [blame] | 3577 | if (Param->getIdentifier() && FnBodyScope) |
Argyrios Kyrtzidis | 87f3ff0 | 2008-04-12 00:47:19 +0000 | [diff] [blame] | 3578 | PushOnScopeChains(Param, FnBodyScope); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3579 | } |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 3580 | |
Anton Korobeynikov | 2f40270 | 2008-12-26 00:52:02 +0000 | [diff] [blame] | 3581 | // Checking attributes of current function definition |
| 3582 | // dllimport attribute. |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 3583 | if (FD->getAttr<DLLImportAttr>() && |
| 3584 | (!FD->getAttr<DLLExportAttr>())) { |
Anton Korobeynikov | 2f40270 | 2008-12-26 00:52:02 +0000 | [diff] [blame] | 3585 | // dllimport attribute cannot be applied to definition. |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 3586 | if (!(FD->getAttr<DLLImportAttr>())->isInherited()) { |
Anton Korobeynikov | 2f40270 | 2008-12-26 00:52:02 +0000 | [diff] [blame] | 3587 | Diag(FD->getLocation(), |
| 3588 | diag::err_attribute_can_be_applied_only_to_symbol_declaration) |
| 3589 | << "dllimport"; |
| 3590 | FD->setInvalidDecl(); |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 3591 | return DeclPtrTy::make(FD); |
Anton Korobeynikov | 2f40270 | 2008-12-26 00:52:02 +0000 | [diff] [blame] | 3592 | } else { |
| 3593 | // If a symbol previously declared dllimport is later defined, the |
| 3594 | // attribute is ignored in subsequent references, and a warning is |
| 3595 | // emitted. |
| 3596 | Diag(FD->getLocation(), |
| 3597 | diag::warn_redeclaration_without_attribute_prev_attribute_ignored) |
| 3598 | << FD->getNameAsCString() << "dllimport"; |
| 3599 | } |
| 3600 | } |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 3601 | return DeclPtrTy::make(FD); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3602 | } |
| 3603 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 3604 | Sema::DeclPtrTy Sema::ActOnFinishFunctionBody(DeclPtrTy D, StmtArg BodyArg) { |
Douglas Gregor | e2c31ff | 2009-05-15 17:59:04 +0000 | [diff] [blame] | 3605 | return ActOnFinishFunctionBody(D, move(BodyArg), false); |
| 3606 | } |
| 3607 | |
| 3608 | Sema::DeclPtrTy Sema::ActOnFinishFunctionBody(DeclPtrTy D, StmtArg BodyArg, |
| 3609 | bool IsInstantiation) { |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 3610 | Decl *dcl = D.getAs<Decl>(); |
Sebastian Redl | d3a413d | 2009-04-26 20:35:05 +0000 | [diff] [blame] | 3611 | Stmt *Body = BodyArg.takeAs<Stmt>(); |
Steve Naroff | 394f3f4 | 2008-07-25 17:57:26 +0000 | [diff] [blame] | 3612 | if (FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(dcl)) { |
Chris Lattner | a5251fc | 2009-04-18 09:36:27 +0000 | [diff] [blame] | 3613 | FD->setBody(Body); |
John McCall | 07a5c22 | 2009-08-15 02:09:25 +0000 | [diff] [blame] | 3614 | if (FD->isMain(Context)) |
Mike Stump | 5f28a1e | 2009-07-24 02:49:01 +0000 | [diff] [blame] | 3615 | // C and C++ allow for main to automagically return 0. |
John McCall | 0cfeb63 | 2009-07-28 01:00:58 +0000 | [diff] [blame] | 3616 | // Implements C++ [basic.start.main]p5 and C99 5.1.2.2.3. |
| 3617 | FD->setHasImplicitReturnZero(true); |
| 3618 | else |
Mike Stump | b1682c5 | 2009-07-22 23:56:57 +0000 | [diff] [blame] | 3619 | CheckFallThroughForFunctionDef(FD, Body); |
Douglas Gregor | e0762c9 | 2009-06-19 23:52:42 +0000 | [diff] [blame] | 3620 | |
| 3621 | if (!FD->isInvalidDecl()) |
| 3622 | DiagnoseUnusedParameters(FD->param_begin(), FD->param_end()); |
| 3623 | |
| 3624 | // C++ [basic.def.odr]p2: |
| 3625 | // [...] A virtual member function is used if it is not pure. [...] |
| 3626 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(FD)) |
| 3627 | if (Method->isVirtual() && !Method->isPure()) |
| 3628 | MarkDeclarationReferenced(Method->getLocation(), Method); |
| 3629 | |
Argyrios Kyrtzidis | 53d0ea5 | 2008-06-28 06:07:14 +0000 | [diff] [blame] | 3630 | assert(FD == getCurFunctionDecl() && "Function parsing confused"); |
Steve Naroff | 394f3f4 | 2008-07-25 17:57:26 +0000 | [diff] [blame] | 3631 | } else if (ObjCMethodDecl *MD = dyn_cast_or_null<ObjCMethodDecl>(dcl)) { |
Chris Lattner | ffed163 | 2009-02-16 19:27:54 +0000 | [diff] [blame] | 3632 | assert(MD == getCurMethodDecl() && "Method parsing confused"); |
Chris Lattner | a5251fc | 2009-04-18 09:36:27 +0000 | [diff] [blame] | 3633 | MD->setBody(Body); |
Mike Stump | 5f28a1e | 2009-07-24 02:49:01 +0000 | [diff] [blame] | 3634 | CheckFallThroughForFunctionDef(MD, Body); |
Argyrios Kyrtzidis | a2e85ad | 2009-07-18 00:33:33 +0000 | [diff] [blame] | 3635 | MD->setEndLoc(Body->getLocEnd()); |
Douglas Gregor | e0762c9 | 2009-06-19 23:52:42 +0000 | [diff] [blame] | 3636 | |
| 3637 | if (!MD->isInvalidDecl()) |
| 3638 | DiagnoseUnusedParameters(MD->param_begin(), MD->param_end()); |
Ted Kremenek | 8189cde | 2009-02-07 01:47:29 +0000 | [diff] [blame] | 3639 | } else { |
| 3640 | Body->Destroy(Context); |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 3641 | return DeclPtrTy(); |
Ted Kremenek | 8189cde | 2009-02-07 01:47:29 +0000 | [diff] [blame] | 3642 | } |
Douglas Gregor | e2c31ff | 2009-05-15 17:59:04 +0000 | [diff] [blame] | 3643 | if (!IsInstantiation) |
| 3644 | PopDeclContext(); |
| 3645 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3646 | // Verify and clean out per-function state. |
Eli Friedman | 8f17b66 | 2009-02-28 05:41:13 +0000 | [diff] [blame] | 3647 | |
Chris Lattner | 4f2aac3 | 2009-04-18 20:05:34 +0000 | [diff] [blame] | 3648 | assert(&getLabelMap() == &FunctionLabelMap && "Didn't pop block right?"); |
Chris Lattner | ea29a3a | 2009-04-18 20:01:55 +0000 | [diff] [blame] | 3649 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3650 | // Check goto/label use. |
Steve Naroff | caaacec | 2009-03-13 15:38:40 +0000 | [diff] [blame] | 3651 | for (llvm::DenseMap<IdentifierInfo*, LabelStmt*>::iterator |
Chris Lattner | ea29a3a | 2009-04-18 20:01:55 +0000 | [diff] [blame] | 3652 | I = FunctionLabelMap.begin(), E = FunctionLabelMap.end(); I != E; ++I) { |
Chris Lattner | e32f74c | 2009-04-18 19:30:02 +0000 | [diff] [blame] | 3653 | LabelStmt *L = I->second; |
| 3654 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3655 | // Verify that we have no forward references left. If so, there was a goto |
| 3656 | // or address of a label taken, but no definition of it. Label fwd |
| 3657 | // definitions are indicated with a null substmt. |
Chris Lattner | e32f74c | 2009-04-18 19:30:02 +0000 | [diff] [blame] | 3658 | if (L->getSubStmt() != 0) |
| 3659 | continue; |
| 3660 | |
| 3661 | // Emit error. |
| 3662 | Diag(L->getIdentLoc(), diag::err_undeclared_label_use) << L->getName(); |
| 3663 | |
| 3664 | // At this point, we have gotos that use the bogus label. Stitch it into |
| 3665 | // the function body so that they aren't leaked and that the AST is well |
| 3666 | // formed. |
| 3667 | if (Body == 0) { |
| 3668 | // The whole function wasn't parsed correctly, just delete this. |
| 3669 | L->Destroy(Context); |
| 3670 | continue; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3671 | } |
Chris Lattner | e32f74c | 2009-04-18 19:30:02 +0000 | [diff] [blame] | 3672 | |
| 3673 | // Otherwise, the body is valid: we want to stitch the label decl into the |
| 3674 | // function somewhere so that it is properly owned and so that the goto |
| 3675 | // has a valid target. Do this by creating a new compound stmt with the |
| 3676 | // label in it. |
Sebastian Redl | d3a413d | 2009-04-26 20:35:05 +0000 | [diff] [blame] | 3677 | |
Chris Lattner | e32f74c | 2009-04-18 19:30:02 +0000 | [diff] [blame] | 3678 | // Give the label a sub-statement. |
| 3679 | L->setSubStmt(new (Context) NullStmt(L->getIdentLoc())); |
Sebastian Redl | d3a413d | 2009-04-26 20:35:05 +0000 | [diff] [blame] | 3680 | |
| 3681 | CompoundStmt *Compound = isa<CXXTryStmt>(Body) ? |
| 3682 | cast<CXXTryStmt>(Body)->getTryBlock() : |
| 3683 | cast<CompoundStmt>(Body); |
| 3684 | std::vector<Stmt*> Elements(Compound->body_begin(), Compound->body_end()); |
Chris Lattner | e32f74c | 2009-04-18 19:30:02 +0000 | [diff] [blame] | 3685 | Elements.push_back(L); |
Sebastian Redl | d3a413d | 2009-04-26 20:35:05 +0000 | [diff] [blame] | 3686 | Compound->setStmts(Context, &Elements[0], Elements.size()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3687 | } |
Chris Lattner | ea29a3a | 2009-04-18 20:01:55 +0000 | [diff] [blame] | 3688 | FunctionLabelMap.clear(); |
Eli Friedman | 8f17b66 | 2009-02-28 05:41:13 +0000 | [diff] [blame] | 3689 | |
| 3690 | if (!Body) return D; |
| 3691 | |
Chris Lattner | b565937 | 2009-04-18 21:00:42 +0000 | [diff] [blame] | 3692 | // Verify that that gotos and switch cases don't jump into scopes illegally. |
Chris Lattner | 38c5ebd | 2009-04-19 05:21:20 +0000 | [diff] [blame] | 3693 | if (CurFunctionNeedsScopeChecking) |
| 3694 | DiagnoseInvalidJumps(Body); |
Fariborz Jahanian | 393612e | 2009-07-21 22:36:06 +0000 | [diff] [blame] | 3695 | |
| 3696 | // C++ constructors that have function-try-blocks can't have return |
| 3697 | // statements in the handlers of that block. (C++ [except.handle]p14) |
| 3698 | // Verify this. |
Sebastian Redl | 13e8854 | 2009-04-27 21:33:24 +0000 | [diff] [blame] | 3699 | if (isa<CXXConstructorDecl>(dcl) && isa<CXXTryStmt>(Body)) |
| 3700 | DiagnoseReturnInConstructorExceptionHandler(cast<CXXTryStmt>(Body)); |
Fariborz Jahanian | 393612e | 2009-07-21 22:36:06 +0000 | [diff] [blame] | 3701 | |
| 3702 | if (CXXDestructorDecl *Destructor = dyn_cast<CXXDestructorDecl>(dcl)) |
| 3703 | Destructor->computeBaseOrMembersToDestroy(Context); |
Steve Naroff | d6d054d | 2007-11-11 23:20:51 +0000 | [diff] [blame] | 3704 | return D; |
Fariborz Jahanian | 60fbca0 | 2007-11-10 16:31:34 +0000 | [diff] [blame] | 3705 | } |
| 3706 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3707 | /// ImplicitlyDefineFunction - An undeclared identifier was used in a function |
| 3708 | /// call, forming a call to an implicitly defined function (per C99 6.5.1p2). |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 3709 | NamedDecl *Sema::ImplicitlyDefineFunction(SourceLocation Loc, |
| 3710 | IdentifierInfo &II, Scope *S) { |
Douglas Gregor | 6393519 | 2009-03-02 00:19:53 +0000 | [diff] [blame] | 3711 | // Before we produce a declaration for an implicitly defined |
| 3712 | // function, see whether there was a locally-scoped declaration of |
| 3713 | // this name as a function or variable. If so, use that |
| 3714 | // (non-visible) declaration, and complain about it. |
| 3715 | llvm::DenseMap<DeclarationName, NamedDecl *>::iterator Pos |
| 3716 | = LocallyScopedExternalDecls.find(&II); |
| 3717 | if (Pos != LocallyScopedExternalDecls.end()) { |
| 3718 | Diag(Loc, diag::warn_use_out_of_scope_declaration) << Pos->second; |
| 3719 | Diag(Pos->second->getLocation(), diag::note_previous_declaration); |
| 3720 | return Pos->second; |
| 3721 | } |
| 3722 | |
Chris Lattner | 37d1084 | 2008-05-05 21:18:06 +0000 | [diff] [blame] | 3723 | // Extension in C99. Legal in C90, but warn about it. |
| 3724 | if (getLangOptions().C99) |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 3725 | Diag(Loc, diag::ext_implicit_function_decl) << &II; |
Chris Lattner | 37d1084 | 2008-05-05 21:18:06 +0000 | [diff] [blame] | 3726 | else |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 3727 | Diag(Loc, diag::warn_implicit_function_decl) << &II; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3728 | |
| 3729 | // FIXME: handle stuff like: |
| 3730 | // void foo() { extern float X(); } |
| 3731 | // void bar() { X(); } <-- implicit decl for X in another scope. |
| 3732 | |
| 3733 | // Set a Declarator for the implicit definition: int foo(); |
| 3734 | const char *Dummy; |
| 3735 | DeclSpec DS; |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 3736 | unsigned DiagID; |
| 3737 | bool Error = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, Dummy, DiagID); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3738 | Error = Error; // Silence warning. |
| 3739 | assert(!Error && "Error setting up implicit decl!"); |
| 3740 | Declarator D(DS, Declarator::BlockContext); |
Sebastian Redl | 7dc8134 | 2009-04-29 17:30:04 +0000 | [diff] [blame] | 3741 | D.AddTypeInfo(DeclaratorChunk::getFunction(false, false, SourceLocation(), 0, |
Sebastian Redl | 3cc9726 | 2009-05-31 11:47:27 +0000 | [diff] [blame] | 3742 | 0, 0, false, SourceLocation(), |
| 3743 | false, 0,0,0, Loc, D), |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 3744 | SourceLocation()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3745 | D.SetIdentifier(&II, Loc); |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 3746 | |
Argyrios Kyrtzidis | 93213bb | 2008-05-01 21:04:16 +0000 | [diff] [blame] | 3747 | // Insert this function into translation-unit scope. |
| 3748 | |
| 3749 | DeclContext *PrevDC = CurContext; |
| 3750 | CurContext = Context.getTranslationUnitDecl(); |
| 3751 | |
Steve Naroff | e2ef815 | 2008-04-04 14:32:09 +0000 | [diff] [blame] | 3752 | FunctionDecl *FD = |
Douglas Gregor | 2e01cda | 2009-06-23 21:43:56 +0000 | [diff] [blame] | 3753 | dyn_cast<FunctionDecl>(ActOnDeclarator(TUScope, D).getAs<Decl>()); |
Steve Naroff | e2ef815 | 2008-04-04 14:32:09 +0000 | [diff] [blame] | 3754 | FD->setImplicit(); |
Argyrios Kyrtzidis | 93213bb | 2008-05-01 21:04:16 +0000 | [diff] [blame] | 3755 | |
| 3756 | CurContext = PrevDC; |
| 3757 | |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 3758 | AddKnownFunctionAttributes(FD); |
| 3759 | |
Steve Naroff | e2ef815 | 2008-04-04 14:32:09 +0000 | [diff] [blame] | 3760 | return FD; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3761 | } |
| 3762 | |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 3763 | /// \brief Adds any function attributes that we know a priori based on |
| 3764 | /// the declaration of this function. |
| 3765 | /// |
| 3766 | /// These attributes can apply both to implicitly-declared builtins |
| 3767 | /// (like __builtin___printf_chk) or to library-declared functions |
| 3768 | /// like NSLog or printf. |
| 3769 | void Sema::AddKnownFunctionAttributes(FunctionDecl *FD) { |
| 3770 | if (FD->isInvalidDecl()) |
| 3771 | return; |
| 3772 | |
| 3773 | // If this is a built-in function, map its builtin attributes to |
| 3774 | // actual attributes. |
| 3775 | if (unsigned BuiltinID = FD->getBuiltinID(Context)) { |
| 3776 | // Handle printf-formatting attributes. |
| 3777 | unsigned FormatIdx; |
| 3778 | bool HasVAListArg; |
| 3779 | if (Context.BuiltinInfo.isPrintfLike(BuiltinID, FormatIdx, HasVAListArg)) { |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 3780 | if (!FD->getAttr<FormatAttr>()) |
| 3781 | FD->addAttr(::new (Context) FormatAttr("printf", FormatIdx + 1, |
Eli Friedman | d7dad72 | 2009-06-10 04:01:38 +0000 | [diff] [blame] | 3782 | HasVAListArg ? 0 : FormatIdx + 2)); |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 3783 | } |
Daniel Dunbar | ef2abfe | 2009-02-16 22:43:43 +0000 | [diff] [blame] | 3784 | |
| 3785 | // Mark const if we don't care about errno and that is the only |
| 3786 | // thing preventing the function from being const. This allows |
| 3787 | // IRgen to use LLVM intrinsics for such functions. |
| 3788 | if (!getLangOptions().MathErrno && |
| 3789 | Context.BuiltinInfo.isConstWithoutErrno(BuiltinID)) { |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 3790 | if (!FD->getAttr<ConstAttr>()) |
| 3791 | FD->addAttr(::new (Context) ConstAttr()); |
Daniel Dunbar | ef2abfe | 2009-02-16 22:43:43 +0000 | [diff] [blame] | 3792 | } |
Mike Stump | 0feecbb | 2009-07-27 19:14:18 +0000 | [diff] [blame] | 3793 | |
| 3794 | if (Context.BuiltinInfo.isNoReturn(BuiltinID)) |
| 3795 | FD->addAttr(::new (Context) NoReturnAttr()); |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 3796 | } |
| 3797 | |
| 3798 | IdentifierInfo *Name = FD->getIdentifier(); |
| 3799 | if (!Name) |
| 3800 | return; |
| 3801 | if ((!getLangOptions().CPlusPlus && |
| 3802 | FD->getDeclContext()->isTranslationUnit()) || |
| 3803 | (isa<LinkageSpecDecl>(FD->getDeclContext()) && |
| 3804 | cast<LinkageSpecDecl>(FD->getDeclContext())->getLanguage() == |
| 3805 | LinkageSpecDecl::lang_c)) { |
| 3806 | // Okay: this could be a libc/libm/Objective-C function we know |
| 3807 | // about. |
| 3808 | } else |
| 3809 | return; |
| 3810 | |
Douglas Gregor | 21e072b | 2009-04-22 20:56:09 +0000 | [diff] [blame] | 3811 | if (Name->isStr("NSLog") || Name->isStr("NSLogv")) { |
Mike Stump | 523a8fd | 2009-07-28 00:07:08 +0000 | [diff] [blame] | 3812 | // FIXME: NSLog and NSLogv should be target specific |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 3813 | if (const FormatAttr *Format = FD->getAttr<FormatAttr>()) { |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 3814 | // FIXME: We known better than our headers. |
| 3815 | const_cast<FormatAttr *>(Format)->setType("printf"); |
| 3816 | } else |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 3817 | FD->addAttr(::new (Context) FormatAttr("printf", 1, |
Eli Friedman | d7dad72 | 2009-06-10 04:01:38 +0000 | [diff] [blame] | 3818 | Name->isStr("NSLogv") ? 0 : 2)); |
Douglas Gregor | 21e072b | 2009-04-22 20:56:09 +0000 | [diff] [blame] | 3819 | } else if (Name->isStr("asprintf") || Name->isStr("vasprintf")) { |
Mike Stump | 523a8fd | 2009-07-28 00:07:08 +0000 | [diff] [blame] | 3820 | // FIXME: asprintf and vasprintf aren't C99 functions. Should they be |
| 3821 | // target-specific builtins, perhaps? |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 3822 | if (!FD->getAttr<FormatAttr>()) |
| 3823 | FD->addAttr(::new (Context) FormatAttr("printf", 2, |
Eli Friedman | d7dad72 | 2009-06-10 04:01:38 +0000 | [diff] [blame] | 3824 | Name->isStr("vasprintf") ? 0 : 3)); |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 3825 | } |
Douglas Gregor | 3c385e5 | 2009-02-14 18:57:46 +0000 | [diff] [blame] | 3826 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3827 | |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 3828 | TypedefDecl *Sema::ParseTypedefDecl(Scope *S, Declarator &D, QualType T) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3829 | assert(D.getIdentifier() && "Wrong callback for declspec without declarator"); |
Steve Naroff | 5912a35 | 2007-08-28 20:14:24 +0000 | [diff] [blame] | 3830 | assert(!T.isNull() && "GetTypeForDeclarator() returned null type"); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3831 | |
| 3832 | // Scope manipulation handled by caller. |
Chris Lattner | 0ed844b | 2008-04-04 06:12:32 +0000 | [diff] [blame] | 3833 | TypedefDecl *NewTD = TypedefDecl::Create(Context, CurContext, |
| 3834 | D.getIdentifierLoc(), |
Chris Lattner | 6c2b6eb | 2008-03-15 06:12:44 +0000 | [diff] [blame] | 3835 | D.getIdentifier(), |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 3836 | T); |
Anders Carlsson | 4843e58 | 2009-03-10 17:07:44 +0000 | [diff] [blame] | 3837 | |
| 3838 | if (TagType *TT = dyn_cast<TagType>(T)) { |
| 3839 | TagDecl *TD = TT->getDecl(); |
| 3840 | |
| 3841 | // If the TagDecl that the TypedefDecl points to is an anonymous decl |
| 3842 | // keep track of the TypedefDecl. |
| 3843 | if (!TD->getIdentifier() && !TD->getTypedefForAnonDecl()) |
| 3844 | TD->setTypedefForAnonDecl(NewTD); |
| 3845 | } |
| 3846 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 3847 | if (D.isInvalidType()) |
Steve Naroff | 5912a35 | 2007-08-28 20:14:24 +0000 | [diff] [blame] | 3848 | NewTD->setInvalidDecl(); |
| 3849 | return NewTD; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3850 | } |
| 3851 | |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 3852 | |
| 3853 | /// \brief Determine whether a tag with a given kind is acceptable |
| 3854 | /// as a redeclaration of the given tag declaration. |
| 3855 | /// |
| 3856 | /// \returns true if the new tag kind is acceptable, false otherwise. |
| 3857 | bool Sema::isAcceptableTagRedeclaration(const TagDecl *Previous, |
| 3858 | TagDecl::TagKind NewTag, |
| 3859 | SourceLocation NewTagLoc, |
| 3860 | const IdentifierInfo &Name) { |
| 3861 | // C++ [dcl.type.elab]p3: |
| 3862 | // The class-key or enum keyword present in the |
| 3863 | // elaborated-type-specifier shall agree in kind with the |
| 3864 | // declaration to which the name in theelaborated-type-specifier |
| 3865 | // refers. This rule also applies to the form of |
| 3866 | // elaborated-type-specifier that declares a class-name or |
| 3867 | // friend class since it can be construed as referring to the |
| 3868 | // definition of the class. Thus, in any |
| 3869 | // elaborated-type-specifier, the enum keyword shall be used to |
| 3870 | // refer to an enumeration (7.2), the union class-keyshall be |
| 3871 | // used to refer to a union (clause 9), and either the class or |
| 3872 | // struct class-key shall be used to refer to a class (clause 9) |
| 3873 | // declared using the class or struct class-key. |
| 3874 | TagDecl::TagKind OldTag = Previous->getTagKind(); |
| 3875 | if (OldTag == NewTag) |
| 3876 | return true; |
| 3877 | |
| 3878 | if ((OldTag == TagDecl::TK_struct || OldTag == TagDecl::TK_class) && |
| 3879 | (NewTag == TagDecl::TK_struct || NewTag == TagDecl::TK_class)) { |
| 3880 | // Warn about the struct/class tag mismatch. |
| 3881 | bool isTemplate = false; |
| 3882 | if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(Previous)) |
| 3883 | isTemplate = Record->getDescribedClassTemplate(); |
| 3884 | |
| 3885 | Diag(NewTagLoc, diag::warn_struct_class_tag_mismatch) |
| 3886 | << (NewTag == TagDecl::TK_class) |
| 3887 | << isTemplate << &Name |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 3888 | << CodeModificationHint::CreateReplacement(SourceRange(NewTagLoc), |
| 3889 | OldTag == TagDecl::TK_class? "class" : "struct"); |
| 3890 | Diag(Previous->getLocation(), diag::note_previous_use); |
| 3891 | return true; |
| 3892 | } |
| 3893 | return false; |
| 3894 | } |
| 3895 | |
Steve Naroff | 08d92e4 | 2007-09-15 18:49:24 +0000 | [diff] [blame] | 3896 | /// 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] | 3897 | /// 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] | 3898 | /// 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] | 3899 | /// reference/declaration/definition of a tag. |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 3900 | Sema::DeclPtrTy Sema::ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 3901 | SourceLocation KWLoc, const CXXScopeSpec &SS, |
| 3902 | IdentifierInfo *Name, SourceLocation NameLoc, |
Douglas Gregor | 402abb5 | 2009-05-28 23:31:59 +0000 | [diff] [blame] | 3903 | AttributeList *Attr, AccessSpecifier AS, |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 3904 | MultiTemplateParamsArg TemplateParameterLists, |
Douglas Gregor | 402abb5 | 2009-05-28 23:31:59 +0000 | [diff] [blame] | 3905 | bool &OwnedDecl) { |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 3906 | // If this is not a definition, it must have a name. |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 3907 | assert((Name != 0 || TUK == TUK_Definition) && |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3908 | "Nameless record must be a definition!"); |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 3909 | |
Douglas Gregor | 402abb5 | 2009-05-28 23:31:59 +0000 | [diff] [blame] | 3910 | OwnedDecl = false; |
Argyrios Kyrtzidis | 39ba4ae | 2008-06-09 23:19:58 +0000 | [diff] [blame] | 3911 | TagDecl::TagKind Kind; |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 3912 | switch (TagSpec) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3913 | default: assert(0 && "Unknown tag type!"); |
Argyrios Kyrtzidis | 39ba4ae | 2008-06-09 23:19:58 +0000 | [diff] [blame] | 3914 | case DeclSpec::TST_struct: Kind = TagDecl::TK_struct; break; |
| 3915 | case DeclSpec::TST_union: Kind = TagDecl::TK_union; break; |
| 3916 | case DeclSpec::TST_class: Kind = TagDecl::TK_class; break; |
| 3917 | case DeclSpec::TST_enum: Kind = TagDecl::TK_enum; break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 3918 | } |
| 3919 | |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 3920 | if (TUK != TUK_Reference) { |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 3921 | if (TemplateParameterList *TemplateParams |
| 3922 | = MatchTemplateParametersToScopeSpecifier(KWLoc, SS, |
| 3923 | (TemplateParameterList**)TemplateParameterLists.get(), |
| 3924 | TemplateParameterLists.size())) { |
| 3925 | if (TemplateParams->size() > 0) { |
| 3926 | // This is a declaration or definition of a class template (which may |
| 3927 | // be a member of another template). |
| 3928 | OwnedDecl = false; |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 3929 | DeclResult Result = CheckClassTemplate(S, TagSpec, TUK, KWLoc, |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 3930 | SS, Name, NameLoc, Attr, |
| 3931 | move(TemplateParameterLists), |
| 3932 | AS); |
| 3933 | return Result.get(); |
| 3934 | } else { |
| 3935 | // FIXME: diagnose the extraneous 'template<>', once we recover |
| 3936 | // slightly better in ParseTemplate.cpp from bogus template |
| 3937 | // parameters. |
| 3938 | } |
| 3939 | } |
| 3940 | } |
| 3941 | |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 3942 | DeclContext *SearchDC = CurContext; |
Argyrios Kyrtzidis | 0f84a23 | 2008-11-09 22:53:32 +0000 | [diff] [blame] | 3943 | DeclContext *DC = CurContext; |
Douglas Gregor | 47b9a1c | 2009-02-04 17:27:36 +0000 | [diff] [blame] | 3944 | NamedDecl *PrevDecl = 0; |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 3945 | |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 3946 | bool Invalid = false; |
| 3947 | |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 3948 | if (Name && SS.isNotEmpty()) { |
| 3949 | // We have a nested-name tag ('struct foo::bar'). |
| 3950 | |
| 3951 | // Check for invalid 'foo::'. |
Argyrios Kyrtzidis | 0f84a23 | 2008-11-09 22:53:32 +0000 | [diff] [blame] | 3952 | if (SS.isInvalid()) { |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 3953 | Name = 0; |
| 3954 | goto CreateNewDecl; |
| 3955 | } |
| 3956 | |
Douglas Gregor | 3f5b61c | 2009-05-14 00:28:11 +0000 | [diff] [blame] | 3957 | if (RequireCompleteDeclContext(SS)) |
| 3958 | return DeclPtrTy::make((Decl *)0); |
| 3959 | |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 3960 | DC = computeDeclContext(SS, true); |
Douglas Gregor | 1931b44 | 2009-02-03 00:34:39 +0000 | [diff] [blame] | 3961 | SearchDC = DC; |
Argyrios Kyrtzidis | 0f84a23 | 2008-11-09 22:53:32 +0000 | [diff] [blame] | 3962 | // Look-up name inside 'foo::'. |
Douglas Gregor | 3f5b61c | 2009-05-14 00:28:11 +0000 | [diff] [blame] | 3963 | PrevDecl |
| 3964 | = dyn_cast_or_null<TagDecl>( |
| 3965 | LookupQualifiedName(DC, Name, LookupTagName, true).getAsDecl()); |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 3966 | |
| 3967 | // A tag 'foo::bar' must already exist. |
| 3968 | if (PrevDecl == 0) { |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 3969 | Diag(NameLoc, diag::err_not_tag_in_scope) << Name << SS.getRange(); |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 3970 | Name = 0; |
Douglas Gregor | d0c8737 | 2009-05-27 17:30:49 +0000 | [diff] [blame] | 3971 | Invalid = true; |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 3972 | goto CreateNewDecl; |
| 3973 | } |
Chris Lattner | cf79b01 | 2009-01-21 02:38:50 +0000 | [diff] [blame] | 3974 | } else if (Name) { |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 3975 | // If this is a named struct, check to see if there was a previous forward |
| 3976 | // declaration or definition. |
Douglas Gregor | 2a3009a | 2009-02-03 19:21:40 +0000 | [diff] [blame] | 3977 | // FIXME: We're looking into outer scopes here, even when we |
| 3978 | // shouldn't be. Doing so can result in ambiguities that we |
| 3979 | // shouldn't be diagnosing. |
Douglas Gregor | e2c565d | 2009-02-03 19:26:08 +0000 | [diff] [blame] | 3980 | LookupResult R = LookupName(S, Name, LookupTagName, |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 3981 | /*RedeclarationOnly=*/(TUK != TUK_Reference)); |
Douglas Gregor | 2a3009a | 2009-02-03 19:21:40 +0000 | [diff] [blame] | 3982 | if (R.isAmbiguous()) { |
| 3983 | DiagnoseAmbiguousLookup(R, Name, NameLoc); |
| 3984 | // FIXME: This is not best way to recover from case like: |
| 3985 | // |
| 3986 | // struct S s; |
| 3987 | // |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 3988 | // causes needless "incomplete type" error later. |
Douglas Gregor | 2a3009a | 2009-02-03 19:21:40 +0000 | [diff] [blame] | 3989 | Name = 0; |
| 3990 | PrevDecl = 0; |
| 3991 | Invalid = true; |
Mike Stump | ac5fc7c | 2009-08-04 21:02:39 +0000 | [diff] [blame] | 3992 | } else |
Douglas Gregor | 47b9a1c | 2009-02-04 17:27:36 +0000 | [diff] [blame] | 3993 | PrevDecl = R; |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 3994 | |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 3995 | if (!getLangOptions().CPlusPlus && TUK != TUK_Reference) { |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 3996 | // FIXME: This makes sure that we ignore the contexts associated |
| 3997 | // with C structs, unions, and enums when looking for a matching |
| 3998 | // tag declaration or definition. See the similar lookup tweak |
Douglas Gregor | 4c921ae | 2009-01-30 01:04:22 +0000 | [diff] [blame] | 3999 | // in Sema::LookupName; is there a better way to deal with this? |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 4000 | while (isa<RecordDecl>(SearchDC) || isa<EnumDecl>(SearchDC)) |
| 4001 | SearchDC = SearchDC->getParent(); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 4002 | } |
Argyrios Kyrtzidis | 630c81b | 2008-11-09 22:09:58 +0000 | [diff] [blame] | 4003 | } |
| 4004 | |
Douglas Gregor | f57172b | 2008-12-08 18:40:42 +0000 | [diff] [blame] | 4005 | if (PrevDecl && PrevDecl->isTemplateParameter()) { |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 4006 | // Maybe we will complain about the shadowed template parameter. |
| 4007 | DiagnoseTemplateParameterShadow(NameLoc, PrevDecl); |
| 4008 | // Just pretend that we didn't see the previous declaration. |
| 4009 | PrevDecl = 0; |
| 4010 | } |
| 4011 | |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 4012 | if (PrevDecl) { |
Douglas Gregor | 48f3bb9 | 2009-02-18 21:56:37 +0000 | [diff] [blame] | 4013 | // Check whether the previous declaration is usable. |
| 4014 | (void)DiagnoseUseOfDecl(PrevDecl, NameLoc); |
Chris Lattner | 22bd905 | 2009-02-16 22:07:16 +0000 | [diff] [blame] | 4015 | |
Argyrios Kyrtzidis | 2d1c5d3 | 2008-04-27 13:50:30 +0000 | [diff] [blame] | 4016 | if (TagDecl *PrevTagDecl = dyn_cast<TagDecl>(PrevDecl)) { |
Chris Lattner | 14943b9 | 2008-07-03 03:30:58 +0000 | [diff] [blame] | 4017 | // If this is a use of a previous tag, or if the tag is already declared |
| 4018 | // in the same scope (so that the definition/declaration completes or |
Argyrios Kyrtzidis | 2d1c5d3 | 2008-04-27 13:50:30 +0000 | [diff] [blame] | 4019 | // rementions the tag), reuse the decl. |
John McCall | 67d1a67 | 2009-08-06 02:15:43 +0000 | [diff] [blame] | 4020 | if (TUK == TUK_Reference || TUK == TUK_Friend || |
| 4021 | isDeclInScope(PrevDecl, SearchDC, S)) { |
Chris Lattner | 14943b9 | 2008-07-03 03:30:58 +0000 | [diff] [blame] | 4022 | // Make sure that this wasn't declared as an enum and now used as a |
| 4023 | // struct or something similar. |
Douglas Gregor | 501c5ce | 2009-05-14 16:41:31 +0000 | [diff] [blame] | 4024 | if (!isAcceptableTagRedeclaration(PrevTagDecl, Kind, KWLoc, *Name)) { |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 4025 | bool SafeToContinue |
| 4026 | = (PrevTagDecl->getTagKind() != TagDecl::TK_enum && |
| 4027 | Kind != TagDecl::TK_enum); |
| 4028 | if (SafeToContinue) |
| 4029 | Diag(KWLoc, diag::err_use_with_wrong_tag) |
| 4030 | << Name |
| 4031 | << CodeModificationHint::CreateReplacement(SourceRange(KWLoc), |
| 4032 | PrevTagDecl->getKindName()); |
| 4033 | else |
| 4034 | Diag(KWLoc, diag::err_use_with_wrong_tag) << Name; |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 4035 | Diag(PrevDecl->getLocation(), diag::note_previous_use); |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 4036 | |
| 4037 | if (SafeToContinue) |
| 4038 | Kind = PrevTagDecl->getTagKind(); |
| 4039 | else { |
| 4040 | // Recover by making this an anonymous redefinition. |
| 4041 | Name = 0; |
| 4042 | PrevDecl = 0; |
| 4043 | Invalid = true; |
| 4044 | } |
| 4045 | } |
| 4046 | |
| 4047 | if (!Invalid) { |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4048 | // If this is a use, just return the declaration we found. |
Chris Lattner | 14943b9 | 2008-07-03 03:30:58 +0000 | [diff] [blame] | 4049 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4050 | // FIXME: In the future, return a variant or some other clue |
| 4051 | // for the consumer of this Decl to know it doesn't own it. |
| 4052 | // For our current ASTs this shouldn't be a problem, but will |
| 4053 | // need to be changed with DeclGroups. |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 4054 | if (TUK == TUK_Reference) |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4055 | return DeclPtrTy::make(PrevDecl); |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 4056 | |
John McCall | 67d1a67 | 2009-08-06 02:15:43 +0000 | [diff] [blame] | 4057 | // If this is a friend, make sure we create the new |
| 4058 | // declaration in the appropriate semantic context. |
| 4059 | if (TUK == TUK_Friend) |
| 4060 | SearchDC = PrevDecl->getDeclContext(); |
| 4061 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4062 | // Diagnose attempts to redefine a tag. |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 4063 | if (TUK == TUK_Definition) { |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4064 | if (TagDecl *Def = PrevTagDecl->getDefinition(Context)) { |
| 4065 | Diag(NameLoc, diag::err_redefinition) << Name; |
| 4066 | Diag(Def->getLocation(), diag::note_previous_definition); |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 4067 | // If this is a redefinition, recover by making this |
| 4068 | // struct be anonymous, which will make any later |
| 4069 | // references get the previous definition. |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4070 | Name = 0; |
| 4071 | PrevDecl = 0; |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 4072 | Invalid = true; |
| 4073 | } else { |
| 4074 | // If the type is currently being defined, complain |
| 4075 | // about a nested redefinition. |
| 4076 | TagType *Tag = cast<TagType>(Context.getTagDeclType(PrevTagDecl)); |
| 4077 | if (Tag->isBeingDefined()) { |
| 4078 | Diag(NameLoc, diag::err_nested_redefinition) << Name; |
| 4079 | Diag(PrevTagDecl->getLocation(), |
| 4080 | diag::note_previous_definition); |
| 4081 | Name = 0; |
| 4082 | PrevDecl = 0; |
| 4083 | Invalid = true; |
| 4084 | } |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4085 | } |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 4086 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4087 | // Okay, this is definition of a previously declared or referenced |
| 4088 | // tag PrevDecl. We're going to create a new Decl for it. |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 4089 | } |
Argyrios Kyrtzidis | 2d1c5d3 | 2008-04-27 13:50:30 +0000 | [diff] [blame] | 4090 | } |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4091 | // If we get here we have (another) forward declaration or we |
John McCall | 67d1a67 | 2009-08-06 02:15:43 +0000 | [diff] [blame] | 4092 | // have a definition. Just create a new decl. |
| 4093 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4094 | } else { |
| 4095 | // If we get here, this is a definition of a new tag type in a nested |
| 4096 | // scope, e.g. "struct foo; void bar() { struct foo; }", just create a |
| 4097 | // new decl/type. We set PrevDecl to NULL so that the entities |
| 4098 | // have distinct types. |
| 4099 | PrevDecl = 0; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4100 | } |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4101 | // If we get here, we're going to create a new Decl. If PrevDecl |
| 4102 | // is non-NULL, it's a definition of the tag declared by |
| 4103 | // PrevDecl. If it's NULL, we have a new definition. |
Argyrios Kyrtzidis | 2d1c5d3 | 2008-04-27 13:50:30 +0000 | [diff] [blame] | 4104 | } else { |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 4105 | // PrevDecl is a namespace, template, or anything else |
| 4106 | // that lives in the IDNS_Tag identifier namespace. |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 4107 | if (isDeclInScope(PrevDecl, SearchDC, S)) { |
Ted Kremenek | a89d197 | 2008-09-03 18:03:35 +0000 | [diff] [blame] | 4108 | // The tag name clashes with a namespace name, issue an error and |
| 4109 | // recover by making this tag be anonymous. |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 4110 | Diag(NameLoc, diag::err_redefinition_different_kind) << Name; |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 4111 | Diag(PrevDecl->getLocation(), diag::note_previous_definition); |
Argyrios Kyrtzidis | b02ef24 | 2008-07-16 07:45:46 +0000 | [diff] [blame] | 4112 | Name = 0; |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4113 | PrevDecl = 0; |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 4114 | Invalid = true; |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4115 | } else { |
| 4116 | // The existing declaration isn't relevant to us; we're in a |
| 4117 | // new scope, so clear out the previous declaration. |
| 4118 | PrevDecl = 0; |
Argyrios Kyrtzidis | b02ef24 | 2008-07-16 07:45:46 +0000 | [diff] [blame] | 4119 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4120 | } |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 4121 | } else if (TUK == TUK_Reference && SS.isEmpty() && Name && |
Douglas Gregor | 80711a2 | 2009-03-06 18:34:03 +0000 | [diff] [blame] | 4122 | (Kind != TagDecl::TK_enum || !getLangOptions().CPlusPlus)) { |
Douglas Gregor | 42af25f | 2009-05-11 19:58:34 +0000 | [diff] [blame] | 4123 | // C++ [basic.scope.pdecl]p5: |
Douglas Gregor | 3218c4b | 2009-01-09 22:42:13 +0000 | [diff] [blame] | 4124 | // -- for an elaborated-type-specifier of the form |
| 4125 | // |
| 4126 | // class-key identifier |
| 4127 | // |
| 4128 | // if the elaborated-type-specifier is used in the |
| 4129 | // decl-specifier-seq or parameter-declaration-clause of a |
| 4130 | // function defined in namespace scope, the identifier is |
| 4131 | // declared as a class-name in the namespace that contains |
| 4132 | // the declaration; otherwise, except as a friend |
| 4133 | // declaration, the identifier is declared in the smallest |
| 4134 | // non-class, non-function-prototype scope that contains the |
| 4135 | // declaration. |
| 4136 | // |
| 4137 | // C99 6.7.2.3p8 has a similar (but not identical!) provision for |
| 4138 | // C structs and unions. |
Douglas Gregor | 80711a2 | 2009-03-06 18:34:03 +0000 | [diff] [blame] | 4139 | // |
| 4140 | // GNU C also supports this behavior as part of its incomplete |
| 4141 | // enum types extension, while GNU C++ does not. |
| 4142 | // |
Douglas Gregor | 3218c4b | 2009-01-09 22:42:13 +0000 | [diff] [blame] | 4143 | // Find the context where we'll be declaring the tag. |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 4144 | // FIXME: We would like to maintain the current DeclContext as the |
| 4145 | // lexical context, |
Douglas Gregor | 1931b44 | 2009-02-03 00:34:39 +0000 | [diff] [blame] | 4146 | while (SearchDC->isRecord()) |
| 4147 | SearchDC = SearchDC->getParent(); |
Douglas Gregor | 3218c4b | 2009-01-09 22:42:13 +0000 | [diff] [blame] | 4148 | |
| 4149 | // Find the scope where we'll be declaring the tag. |
| 4150 | while (S->isClassScope() || |
| 4151 | (getLangOptions().CPlusPlus && S->isFunctionPrototypeScope()) || |
Douglas Gregor | 1a0d31a | 2009-01-12 18:45:55 +0000 | [diff] [blame] | 4152 | ((S->getFlags() & Scope::DeclScope) == 0) || |
| 4153 | (S->getEntity() && |
| 4154 | ((DeclContext *)S->getEntity())->isTransparentContext())) |
Douglas Gregor | 3218c4b | 2009-01-09 22:42:13 +0000 | [diff] [blame] | 4155 | S = S->getParent(); |
John McCall | 67d1a67 | 2009-08-06 02:15:43 +0000 | [diff] [blame] | 4156 | |
| 4157 | } else if (TUK == TUK_Friend && SS.isEmpty() && Name) { |
| 4158 | // C++ [namespace.memdef]p3: |
| 4159 | // If a friend declaration in a non-local class first declares a |
| 4160 | // class or function, the friend class or function is a member of |
| 4161 | // the innermost enclosing namespace. |
John McCall | 3f9a8a6 | 2009-08-11 06:59:38 +0000 | [diff] [blame] | 4162 | while (!SearchDC->isFileContext()) |
John McCall | 67d1a67 | 2009-08-06 02:15:43 +0000 | [diff] [blame] | 4163 | SearchDC = SearchDC->getParent(); |
| 4164 | |
| 4165 | // The entity of a decl scope is a DeclContext; see PushDeclContext. |
| 4166 | while (S->getEntity() != SearchDC) |
| 4167 | S = S->getParent(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4168 | } |
Argyrios Kyrtzidis | ef6e647 | 2008-11-08 17:17:31 +0000 | [diff] [blame] | 4169 | |
Chris Lattner | cc98eac | 2008-12-17 07:13:27 +0000 | [diff] [blame] | 4170 | CreateNewDecl: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4171 | |
| 4172 | // If there is an identifier, use the location of the identifier as the |
| 4173 | // location of the decl, otherwise use the location of the struct/union |
| 4174 | // keyword. |
| 4175 | SourceLocation Loc = NameLoc.isValid() ? NameLoc : KWLoc; |
| 4176 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4177 | // Otherwise, create a new declaration. If there is a previous |
| 4178 | // declaration of the same entity, the two will be linked via |
| 4179 | // PrevDecl. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4180 | TagDecl *New; |
Douglas Gregor | bcbffc4 | 2009-01-07 00:43:41 +0000 | [diff] [blame] | 4181 | |
Argyrios Kyrtzidis | 39ba4ae | 2008-06-09 23:19:58 +0000 | [diff] [blame] | 4182 | if (Kind == TagDecl::TK_enum) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4183 | // FIXME: Tag decls should be chained to any simultaneous vardecls, e.g.: |
| 4184 | // enum X { A, B, C } D; D should chain to X. |
Douglas Gregor | 741dd9a | 2009-07-21 14:46:17 +0000 | [diff] [blame] | 4185 | New = EnumDecl::Create(Context, SearchDC, Loc, Name, KWLoc, |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4186 | cast_or_null<EnumDecl>(PrevDecl)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4187 | // If this is an undefined enum, warn. |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 4188 | if (TUK != TUK_Definition && !Invalid) { |
Douglas Gregor | 80711a2 | 2009-03-06 18:34:03 +0000 | [diff] [blame] | 4189 | unsigned DK = getLangOptions().CPlusPlus? diag::err_forward_ref_enum |
| 4190 | : diag::ext_forward_ref_enum; |
| 4191 | Diag(Loc, DK); |
| 4192 | } |
Argyrios Kyrtzidis | 39ba4ae | 2008-06-09 23:19:58 +0000 | [diff] [blame] | 4193 | } else { |
| 4194 | // struct/union/class |
| 4195 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4196 | // FIXME: Tag decls should be chained to any simultaneous vardecls, e.g.: |
| 4197 | // struct X { int A; } D; D should chain to X. |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 4198 | if (getLangOptions().CPlusPlus) |
Ted Kremenek | 2b345eb | 2008-09-05 17:39:33 +0000 | [diff] [blame] | 4199 | // FIXME: Look for a way to use RecordDecl for simple structs. |
Douglas Gregor | 741dd9a | 2009-07-21 14:46:17 +0000 | [diff] [blame] | 4200 | New = CXXRecordDecl::Create(Context, Kind, SearchDC, Loc, Name, KWLoc, |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4201 | cast_or_null<CXXRecordDecl>(PrevDecl)); |
Douglas Gregor | ddc29e1 | 2009-02-06 22:42:48 +0000 | [diff] [blame] | 4202 | else |
Douglas Gregor | 741dd9a | 2009-07-21 14:46:17 +0000 | [diff] [blame] | 4203 | New = RecordDecl::Create(Context, Kind, SearchDC, Loc, Name, KWLoc, |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4204 | cast_or_null<RecordDecl>(PrevDecl)); |
Argyrios Kyrtzidis | 0795232 | 2008-07-01 10:37:29 +0000 | [diff] [blame] | 4205 | } |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4206 | |
| 4207 | if (Kind != TagDecl::TK_enum) { |
| 4208 | // Handle #pragma pack: if the #pragma pack stack has non-default |
| 4209 | // alignment, make up a packed attribute for this decl. These |
| 4210 | // attributes are checked when the ASTContext lays out the |
| 4211 | // structure. |
| 4212 | // |
| 4213 | // It is important for implementing the correct semantics that this |
| 4214 | // happen here (in act on tag decl). The #pragma pack stack is |
| 4215 | // maintained as a result of parser callbacks which can occur at |
| 4216 | // many points during the parsing of a struct declaration (because |
| 4217 | // the #pragma tokens are effectively skipped over during the |
| 4218 | // parsing of the struct). |
Chris Lattner | 574aa40 | 2009-02-17 01:09:29 +0000 | [diff] [blame] | 4219 | if (unsigned Alignment = getPragmaPackAlignment()) |
Anders Carlsson | a860e75 | 2009-08-08 18:23:56 +0000 | [diff] [blame] | 4220 | New->addAttr(::new (Context) PragmaPackAttr(Alignment * 8)); |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4221 | } |
| 4222 | |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 4223 | if (getLangOptions().CPlusPlus && SS.isEmpty() && Name && !Invalid) { |
| 4224 | // C++ [dcl.typedef]p3: |
| 4225 | // [...] Similarly, in a given scope, a class or enumeration |
| 4226 | // shall not be declared with the same name as a typedef-name |
| 4227 | // that is declared in that scope and refers to a type other |
| 4228 | // than the class or enumeration itself. |
Douglas Gregor | 4c921ae | 2009-01-30 01:04:22 +0000 | [diff] [blame] | 4229 | LookupResult Lookup = LookupName(S, Name, LookupOrdinaryName, true); |
Douglas Gregor | 6697312 | 2009-01-28 17:15:10 +0000 | [diff] [blame] | 4230 | TypedefDecl *PrevTypedef = 0; |
| 4231 | if (Lookup.getKind() == LookupResult::Found) |
| 4232 | PrevTypedef = dyn_cast<TypedefDecl>(Lookup.getAsDecl()); |
| 4233 | |
| 4234 | if (PrevTypedef && isDeclInScope(PrevTypedef, SearchDC, S) && |
| 4235 | Context.getCanonicalType(Context.getTypeDeclType(PrevTypedef)) != |
| 4236 | Context.getCanonicalType(Context.getTypeDeclType(New))) { |
| 4237 | Diag(Loc, diag::err_tag_definition_of_typedef) |
| 4238 | << Context.getTypeDeclType(New) |
| 4239 | << PrevTypedef->getUnderlyingType(); |
| 4240 | Diag(PrevTypedef->getLocation(), diag::note_previous_definition); |
| 4241 | Invalid = true; |
| 4242 | } |
| 4243 | } |
| 4244 | |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 4245 | if (Invalid) |
| 4246 | New->setInvalidDecl(); |
| 4247 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4248 | if (Attr) |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 4249 | ProcessDeclAttributeList(S, New, Attr); |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4250 | |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 4251 | // If we're declaring or defining a tag in function prototype scope |
| 4252 | // 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] | 4253 | if (Name && S->isFunctionPrototypeScope() && !getLangOptions().CPlusPlus) |
| 4254 | Diag(Loc, diag::warn_decl_in_param_list) << Context.getTagDeclType(New); |
| 4255 | |
Douglas Gregor | 7df7b6b | 2008-12-15 16:32:14 +0000 | [diff] [blame] | 4256 | // Set the lexical context. If the tag has a C++ scope specifier, the |
| 4257 | // lexical context will be different from the semantic context. |
Douglas Gregor | 1931b44 | 2009-02-03 00:34:39 +0000 | [diff] [blame] | 4258 | New->setLexicalDeclContext(CurContext); |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 4259 | |
Anders Carlsson | 0cf8830 | 2009-03-26 01:19:02 +0000 | [diff] [blame] | 4260 | // Set the access specifier. |
John McCall | 67d1a67 | 2009-08-06 02:15:43 +0000 | [diff] [blame] | 4261 | if (!Invalid && TUK != TUK_Friend) |
Douglas Gregor | d0c8737 | 2009-05-27 17:30:49 +0000 | [diff] [blame] | 4262 | SetMemberAccessSpecifier(New, PrevDecl, AS); |
Douglas Gregor | 06c0fec | 2009-03-25 22:00:53 +0000 | [diff] [blame] | 4263 | |
John McCall | 0f434ec | 2009-07-31 02:45:11 +0000 | [diff] [blame] | 4264 | if (TUK == TUK_Definition) |
Douglas Gregor | 0b7a158 | 2009-01-17 00:42:38 +0000 | [diff] [blame] | 4265 | New->startDefinition(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4266 | |
| 4267 | // If this has an identifier, add it to the scope stack. |
John McCall | 67d1a67 | 2009-08-06 02:15:43 +0000 | [diff] [blame] | 4268 | if (Name && TUK != TUK_Friend) { |
Douglas Gregor | 1a0d31a | 2009-01-12 18:45:55 +0000 | [diff] [blame] | 4269 | S = getNonFieldDeclScope(S); |
Douglas Gregor | 1931b44 | 2009-02-03 00:34:39 +0000 | [diff] [blame] | 4270 | PushOnScopeChains(New, S); |
Douglas Gregor | 4920f1f | 2009-01-12 22:49:06 +0000 | [diff] [blame] | 4271 | } else { |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 4272 | CurContext->addDecl(New); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4273 | } |
Argyrios Kyrtzidis | 5239304 | 2008-11-09 23:41:00 +0000 | [diff] [blame] | 4274 | |
Douglas Gregor | c29f77b | 2009-07-07 16:35:42 +0000 | [diff] [blame] | 4275 | // If this is the C FILE type, notify the AST context. |
| 4276 | if (IdentifierInfo *II = New->getIdentifier()) |
| 4277 | if (!New->isInvalidDecl() && |
Mike Stump | 782fa30 | 2009-07-28 02:25:19 +0000 | [diff] [blame] | 4278 | New->getDeclContext()->getLookupContext()->isTranslationUnit() && |
Douglas Gregor | c29f77b | 2009-07-07 16:35:42 +0000 | [diff] [blame] | 4279 | II->isStr("FILE")) |
| 4280 | Context.setFILEDecl(New); |
| 4281 | |
Douglas Gregor | 402abb5 | 2009-05-28 23:31:59 +0000 | [diff] [blame] | 4282 | OwnedDecl = true; |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4283 | return DeclPtrTy::make(New); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4284 | } |
| 4285 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4286 | void Sema::ActOnTagStartDefinition(Scope *S, DeclPtrTy TagD) { |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 4287 | AdjustDeclIfTemplate(TagD); |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4288 | TagDecl *Tag = cast<TagDecl>(TagD.getAs<Decl>()); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 4289 | |
| 4290 | // Enter the tag context. |
| 4291 | PushDeclContext(S, Tag); |
| 4292 | |
| 4293 | if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(Tag)) { |
| 4294 | FieldCollector->StartClass(); |
| 4295 | |
| 4296 | if (Record->getIdentifier()) { |
| 4297 | // C++ [class]p2: |
| 4298 | // [...] The class-name is also inserted into the scope of the |
| 4299 | // class itself; this is known as the injected-class-name. For |
| 4300 | // purposes of access checking, the injected-class-name is treated |
| 4301 | // as if it were a public member name. |
Douglas Gregor | d475b8d | 2009-03-25 21:17:03 +0000 | [diff] [blame] | 4302 | CXXRecordDecl *InjectedClassName |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 4303 | = CXXRecordDecl::Create(Context, Record->getTagKind(), |
| 4304 | CurContext, Record->getLocation(), |
Douglas Gregor | 741dd9a | 2009-07-21 14:46:17 +0000 | [diff] [blame] | 4305 | Record->getIdentifier(), |
| 4306 | Record->getTagKeywordLoc(), |
| 4307 | Record); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 4308 | InjectedClassName->setImplicit(); |
Douglas Gregor | d475b8d | 2009-03-25 21:17:03 +0000 | [diff] [blame] | 4309 | InjectedClassName->setAccess(AS_public); |
Douglas Gregor | befc20e | 2009-03-26 00:10:35 +0000 | [diff] [blame] | 4310 | if (ClassTemplateDecl *Template = Record->getDescribedClassTemplate()) |
| 4311 | InjectedClassName->setDescribedClassTemplate(Template); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 4312 | PushOnScopeChains(InjectedClassName, S); |
Douglas Gregor | c9b5b40 | 2009-03-25 15:59:44 +0000 | [diff] [blame] | 4313 | assert(InjectedClassName->isInjectedClassName() && |
| 4314 | "Broken injected-class-name"); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 4315 | } |
| 4316 | } |
| 4317 | } |
| 4318 | |
Argyrios Kyrtzidis | 07a5b28 | 2009-07-14 03:17:52 +0000 | [diff] [blame] | 4319 | void Sema::ActOnTagFinishDefinition(Scope *S, DeclPtrTy TagD, |
| 4320 | SourceLocation RBraceLoc) { |
Douglas Gregor | aaba5e3 | 2009-02-04 19:02:06 +0000 | [diff] [blame] | 4321 | AdjustDeclIfTemplate(TagD); |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4322 | TagDecl *Tag = cast<TagDecl>(TagD.getAs<Decl>()); |
Argyrios Kyrtzidis | 07a5b28 | 2009-07-14 03:17:52 +0000 | [diff] [blame] | 4323 | Tag->setRBraceLoc(RBraceLoc); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 4324 | |
| 4325 | if (isa<CXXRecordDecl>(Tag)) |
| 4326 | FieldCollector->FinishClass(); |
| 4327 | |
| 4328 | // Exit this scope of this tag's definition. |
| 4329 | PopDeclContext(); |
| 4330 | |
| 4331 | // Notify the consumer that we've defined a tag. |
| 4332 | Consumer.HandleTagDeclDefinition(Tag); |
| 4333 | } |
Chris Lattner | 5a6ddbf | 2008-06-21 19:39:06 +0000 | [diff] [blame] | 4334 | |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 4335 | // Note that FieldName may be null for anonymous bitfields. |
Anders Carlsson | 9f1e572 | 2008-12-06 20:33:04 +0000 | [diff] [blame] | 4336 | bool Sema::VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 4337 | QualType FieldTy, const Expr *BitWidth, |
| 4338 | bool *ZeroWidth) { |
| 4339 | // Default to true; that shouldn't confuse checks for emptiness |
| 4340 | if (ZeroWidth) |
| 4341 | *ZeroWidth = true; |
| 4342 | |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 4343 | // C99 6.7.2.1p4 - verify the field type. |
Chris Lattner | 8b963ef | 2009-03-05 23:01:03 +0000 | [diff] [blame] | 4344 | // C++ 9.6p3: A bit-field shall have integral or enumeration type. |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 4345 | if (!FieldTy->isDependentType() && !FieldTy->isIntegralType()) { |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 4346 | // Handle incomplete types with specific error. |
Douglas Gregor | a03aca8 | 2009-03-10 21:58:27 +0000 | [diff] [blame] | 4347 | if (RequireCompleteType(FieldLoc, FieldTy, diag::err_field_incomplete)) |
| 4348 | return true; |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 4349 | if (FieldName) |
| 4350 | return Diag(FieldLoc, diag::err_not_integral_type_bitfield) |
| 4351 | << FieldName << FieldTy << BitWidth->getSourceRange(); |
| 4352 | return Diag(FieldLoc, diag::err_not_integral_type_anon_bitfield) |
| 4353 | << FieldTy << BitWidth->getSourceRange(); |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 4354 | } |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 4355 | |
| 4356 | // If the bit-width is type- or value-dependent, don't try to check |
| 4357 | // it now. |
| 4358 | if (BitWidth->isValueDependent() || BitWidth->isTypeDependent()) |
| 4359 | return false; |
| 4360 | |
Anders Carlsson | 9f1e572 | 2008-12-06 20:33:04 +0000 | [diff] [blame] | 4361 | llvm::APSInt Value; |
| 4362 | if (VerifyIntegerConstantExpression(BitWidth, &Value)) |
| 4363 | return true; |
| 4364 | |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 4365 | if (Value != 0 && ZeroWidth) |
| 4366 | *ZeroWidth = false; |
| 4367 | |
Chris Lattner | cd08707 | 2008-12-12 04:56:04 +0000 | [diff] [blame] | 4368 | // Zero-width bitfield is ok for anonymous field. |
| 4369 | if (Value == 0 && FieldName) |
| 4370 | return Diag(FieldLoc, diag::err_bitfield_has_zero_width) << FieldName; |
| 4371 | |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 4372 | if (Value.isSigned() && Value.isNegative()) { |
| 4373 | if (FieldName) |
| 4374 | return Diag(FieldLoc, diag::err_bitfield_has_negative_width) |
| 4375 | << FieldName << Value.toString(10); |
| 4376 | return Diag(FieldLoc, diag::err_anon_bitfield_has_negative_width) |
| 4377 | << Value.toString(10); |
| 4378 | } |
Anders Carlsson | 9f1e572 | 2008-12-06 20:33:04 +0000 | [diff] [blame] | 4379 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 4380 | if (!FieldTy->isDependentType()) { |
| 4381 | uint64_t TypeSize = Context.getTypeSize(FieldTy); |
Chris Lattner | df9bcd5 | 2009-04-20 17:29:38 +0000 | [diff] [blame] | 4382 | if (Value.getZExtValue() > TypeSize) { |
| 4383 | if (FieldName) |
| 4384 | return Diag(FieldLoc, diag::err_bitfield_width_exceeds_type_size) |
| 4385 | << FieldName << (unsigned)TypeSize; |
| 4386 | return Diag(FieldLoc, diag::err_anon_bitfield_width_exceeds_type_size) |
| 4387 | << (unsigned)TypeSize; |
| 4388 | } |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 4389 | } |
Anders Carlsson | 9f1e572 | 2008-12-06 20:33:04 +0000 | [diff] [blame] | 4390 | |
| 4391 | return false; |
| 4392 | } |
| 4393 | |
Steve Naroff | 08d92e4 | 2007-09-15 18:49:24 +0000 | [diff] [blame] | 4394 | /// 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] | 4395 | /// to create a FieldDecl object for it. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4396 | Sema::DeclPtrTy Sema::ActOnField(Scope *S, DeclPtrTy TagD, |
| 4397 | SourceLocation DeclStart, |
| 4398 | Declarator &D, ExprTy *BitfieldWidth) { |
| 4399 | FieldDecl *Res = HandleField(S, cast_or_null<RecordDecl>(TagD.getAs<Decl>()), |
| 4400 | DeclStart, D, static_cast<Expr*>(BitfieldWidth), |
| 4401 | AS_public); |
| 4402 | return DeclPtrTy::make(Res); |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 4403 | } |
| 4404 | |
| 4405 | /// HandleField - Analyze a field of a C struct or a C++ data member. |
| 4406 | /// |
| 4407 | FieldDecl *Sema::HandleField(Scope *S, RecordDecl *Record, |
| 4408 | SourceLocation DeclStart, |
Douglas Gregor | 4dd55f5 | 2009-03-11 20:50:30 +0000 | [diff] [blame] | 4409 | Declarator &D, Expr *BitWidth, |
| 4410 | AccessSpecifier AS) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4411 | IdentifierInfo *II = D.getIdentifier(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4412 | SourceLocation Loc = DeclStart; |
| 4413 | if (II) Loc = D.getIdentifierLoc(); |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 4414 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4415 | QualType T = GetTypeForDeclarator(D, S); |
Chris Lattner | 6491f47 | 2009-04-12 22:15:02 +0000 | [diff] [blame] | 4416 | if (getLangOptions().CPlusPlus) |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 4417 | CheckExtraCXXDefaultArguments(D); |
Douglas Gregor | 021c3b3 | 2009-03-11 23:00:04 +0000 | [diff] [blame] | 4418 | |
Eli Friedman | 85a5319 | 2009-04-07 19:37:57 +0000 | [diff] [blame] | 4419 | DiagnoseFunctionSpecifiers(D); |
| 4420 | |
Eli Friedman | 63054b3 | 2009-04-19 20:27:55 +0000 | [diff] [blame] | 4421 | if (D.getDeclSpec().isThreadSpecified()) |
| 4422 | Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_invalid_thread); |
| 4423 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 4424 | NamedDecl *PrevDecl = LookupName(S, II, LookupMemberName, true); |
Douglas Gregor | c19ee3e | 2009-06-17 23:37:01 +0000 | [diff] [blame] | 4425 | |
| 4426 | if (PrevDecl && PrevDecl->isTemplateParameter()) { |
| 4427 | // Maybe we will complain about the shadowed template parameter. |
| 4428 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl); |
| 4429 | // Just pretend that we didn't see the previous declaration. |
| 4430 | PrevDecl = 0; |
| 4431 | } |
| 4432 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 4433 | if (PrevDecl && !isDeclInScope(PrevDecl, Record, S)) |
| 4434 | PrevDecl = 0; |
| 4435 | |
Steve Naroff | ea218b8 | 2009-07-14 14:58:18 +0000 | [diff] [blame] | 4436 | bool Mutable |
| 4437 | = (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_mutable); |
| 4438 | SourceLocation TSSL = D.getSourceRange().getBegin(); |
| 4439 | FieldDecl *NewFD |
| 4440 | = CheckFieldDecl(II, T, Record, Loc, Mutable, BitWidth, TSSL, |
| 4441 | AS, PrevDecl, &D); |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 4442 | if (NewFD->isInvalidDecl() && PrevDecl) { |
| 4443 | // Don't introduce NewFD into scope; there's already something |
| 4444 | // with the same name in the same scope. |
| 4445 | } else if (II) { |
| 4446 | PushOnScopeChains(NewFD, S); |
| 4447 | } else |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 4448 | Record->addDecl(NewFD); |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 4449 | |
| 4450 | return NewFD; |
| 4451 | } |
| 4452 | |
| 4453 | /// \brief Build a new FieldDecl and check its well-formedness. |
| 4454 | /// |
| 4455 | /// This routine builds a new FieldDecl given the fields name, type, |
| 4456 | /// record, etc. \p PrevDecl should refer to any previous declaration |
| 4457 | /// with the same name and in the same scope as the field to be |
| 4458 | /// created. |
| 4459 | /// |
| 4460 | /// \returns a new FieldDecl. |
| 4461 | /// |
| 4462 | /// \todo The Declarator argument is a hack. It will be removed once |
| 4463 | FieldDecl *Sema::CheckFieldDecl(DeclarationName Name, QualType T, |
| 4464 | RecordDecl *Record, SourceLocation Loc, |
| 4465 | bool Mutable, Expr *BitWidth, |
Steve Naroff | ea218b8 | 2009-07-14 14:58:18 +0000 | [diff] [blame] | 4466 | SourceLocation TSSL, |
Douglas Gregor | 4dd55f5 | 2009-03-11 20:50:30 +0000 | [diff] [blame] | 4467 | AccessSpecifier AS, NamedDecl *PrevDecl, |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 4468 | Declarator *D) { |
| 4469 | IdentifierInfo *II = Name.getAsIdentifierInfo(); |
Steve Naroff | 5912a35 | 2007-08-28 20:14:24 +0000 | [diff] [blame] | 4470 | bool InvalidDecl = false; |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 4471 | if (D) InvalidDecl = D->isInvalidType(); |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 4472 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 4473 | // If we receive a broken type, recover by assuming 'int' and |
| 4474 | // marking this declaration as invalid. |
| 4475 | if (T.isNull()) { |
| 4476 | InvalidDecl = true; |
| 4477 | T = Context.IntTy; |
| 4478 | } |
| 4479 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4480 | // C99 6.7.2.1p8: A member of a structure or union may have any type other |
| 4481 | // than a variably modified type. |
Eli Friedman | 9db1397 | 2008-02-15 12:53:51 +0000 | [diff] [blame] | 4482 | if (T->isVariablyModifiedType()) { |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 4483 | bool SizeIsNegative; |
| 4484 | QualType FixedTy = TryToFixInvalidVariablyModifiedType(T, Context, |
| 4485 | SizeIsNegative); |
| 4486 | if (!FixedTy.isNull()) { |
| 4487 | Diag(Loc, diag::warn_illegal_constant_array_size); |
| 4488 | T = FixedTy; |
| 4489 | } else { |
| 4490 | if (SizeIsNegative) |
| 4491 | Diag(Loc, diag::err_typecheck_negative_array_size); |
| 4492 | else |
| 4493 | Diag(Loc, diag::err_typecheck_field_variable_size); |
Eli Friedman | 1ca4813 | 2009-02-21 00:44:51 +0000 | [diff] [blame] | 4494 | InvalidDecl = true; |
| 4495 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4496 | } |
Anders Carlsson | 9f1e572 | 2008-12-06 20:33:04 +0000 | [diff] [blame] | 4497 | |
Anders Carlsson | 4681ebd | 2009-03-22 20:18:17 +0000 | [diff] [blame] | 4498 | // Fields can not have abstract class types |
Anders Carlsson | b9bbe49 | 2009-03-23 17:49:10 +0000 | [diff] [blame] | 4499 | if (RequireNonAbstractType(Loc, T, diag::err_abstract_type_in_decl, |
Anders Carlsson | 8211eff | 2009-03-24 01:19:16 +0000 | [diff] [blame] | 4500 | AbstractFieldType)) |
Anders Carlsson | 4681ebd | 2009-03-22 20:18:17 +0000 | [diff] [blame] | 4501 | InvalidDecl = true; |
| 4502 | |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 4503 | bool ZeroWidth = false; |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 4504 | // If this is declared as a bit-field, check the bit-field. |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 4505 | if (BitWidth && VerifyBitField(Loc, II, T, BitWidth, &ZeroWidth)) { |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 4506 | InvalidDecl = true; |
| 4507 | DeleteExpr(BitWidth); |
| 4508 | BitWidth = 0; |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 4509 | ZeroWidth = false; |
Anders Carlsson | 9f1e572 | 2008-12-06 20:33:04 +0000 | [diff] [blame] | 4510 | } |
| 4511 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 4512 | FieldDecl *NewFD = FieldDecl::Create(Context, Record, Loc, II, T, BitWidth, |
Steve Naroff | ea218b8 | 2009-07-14 14:58:18 +0000 | [diff] [blame] | 4513 | Mutable, TSSL); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 4514 | if (InvalidDecl) |
| 4515 | NewFD->setInvalidDecl(); |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 4516 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 4517 | if (PrevDecl && !isa<TagDecl>(PrevDecl)) { |
| 4518 | Diag(Loc, diag::err_duplicate_member) << II; |
| 4519 | Diag(PrevDecl->getLocation(), diag::note_previous_declaration); |
| 4520 | NewFD->setInvalidDecl(); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 4521 | } |
| 4522 | |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 4523 | if (getLangOptions().CPlusPlus) { |
Douglas Gregor | 5e03f9e | 2009-07-23 23:49:00 +0000 | [diff] [blame] | 4524 | QualType EltTy = Context.getBaseElementType(T); |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 4525 | |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 4526 | CXXRecordDecl* CXXRecord = cast<CXXRecordDecl>(Record); |
| 4527 | |
| 4528 | if (!T->isPODType()) |
| 4529 | CXXRecord->setPOD(false); |
| 4530 | if (!ZeroWidth) |
| 4531 | CXXRecord->setEmpty(false); |
| 4532 | |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 4533 | if (const RecordType *RT = EltTy->getAs<RecordType>()) { |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 4534 | CXXRecordDecl* RDecl = cast<CXXRecordDecl>(RT->getDecl()); |
| 4535 | |
| 4536 | if (!RDecl->hasTrivialConstructor()) |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 4537 | CXXRecord->setHasTrivialConstructor(false); |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 4538 | if (!RDecl->hasTrivialCopyConstructor()) |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 4539 | CXXRecord->setHasTrivialCopyConstructor(false); |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 4540 | if (!RDecl->hasTrivialCopyAssignment()) |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 4541 | CXXRecord->setHasTrivialCopyAssignment(false); |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 4542 | if (!RDecl->hasTrivialDestructor()) |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 4543 | CXXRecord->setHasTrivialDestructor(false); |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 4544 | |
| 4545 | // C++ 9.5p1: An object of a class with a non-trivial |
| 4546 | // constructor, a non-trivial copy constructor, a non-trivial |
| 4547 | // destructor, or a non-trivial copy assignment operator |
| 4548 | // cannot be a member of a union, nor can an array of such |
| 4549 | // objects. |
| 4550 | // TODO: C++0x alters this restriction significantly. |
| 4551 | if (Record->isUnion()) { |
| 4552 | // We check for copy constructors before constructors |
| 4553 | // because otherwise we'll never get complaints about |
| 4554 | // copy constructors. |
| 4555 | |
| 4556 | const CXXSpecialMember invalid = (CXXSpecialMember) -1; |
| 4557 | |
| 4558 | CXXSpecialMember member; |
| 4559 | if (!RDecl->hasTrivialCopyConstructor()) |
| 4560 | member = CXXCopyConstructor; |
| 4561 | else if (!RDecl->hasTrivialConstructor()) |
| 4562 | member = CXXDefaultConstructor; |
| 4563 | else if (!RDecl->hasTrivialCopyAssignment()) |
| 4564 | member = CXXCopyAssignment; |
| 4565 | else if (!RDecl->hasTrivialDestructor()) |
| 4566 | member = CXXDestructor; |
| 4567 | else |
| 4568 | member = invalid; |
| 4569 | |
| 4570 | if (member != invalid) { |
| 4571 | Diag(Loc, diag::err_illegal_union_member) << Name << member; |
| 4572 | DiagnoseNontrivial(RT, member); |
| 4573 | NewFD->setInvalidDecl(); |
| 4574 | } |
| 4575 | } |
| 4576 | } |
| 4577 | } |
| 4578 | |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 4579 | // FIXME: We need to pass in the attributes given an AST |
| 4580 | // representation, not a parser representation. |
| 4581 | if (D) |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 4582 | // FIXME: What to pass instead of TUScope? |
| 4583 | ProcessDeclAttributes(TUScope, NewFD, *D); |
Douglas Gregor | 3cf538d | 2009-03-11 18:59:21 +0000 | [diff] [blame] | 4584 | |
Fariborz Jahanian | f6123ca | 2009-02-19 00:22:47 +0000 | [diff] [blame] | 4585 | if (T.isObjCGCWeak()) |
Fariborz Jahanian | ed7e9ef | 2009-02-18 18:14:41 +0000 | [diff] [blame] | 4586 | Diag(Loc, diag::warn_attribute_weak_on_field); |
Anders Carlsson | ad14806 | 2008-02-16 00:29:18 +0000 | [diff] [blame] | 4587 | |
Douglas Gregor | 4dd55f5 | 2009-03-11 20:50:30 +0000 | [diff] [blame] | 4588 | NewFD->setAccess(AS); |
| 4589 | |
| 4590 | // C++ [dcl.init.aggr]p1: |
| 4591 | // An aggregate is an array or a class (clause 9) with [...] no |
| 4592 | // private or protected non-static data members (clause 11). |
| 4593 | // A POD must be an aggregate. |
| 4594 | if (getLangOptions().CPlusPlus && |
| 4595 | (AS == AS_private || AS == AS_protected)) { |
| 4596 | CXXRecordDecl *CXXRecord = cast<CXXRecordDecl>(Record); |
| 4597 | CXXRecord->setAggregate(false); |
| 4598 | CXXRecord->setPOD(false); |
| 4599 | } |
| 4600 | |
Steve Naroff | 5912a35 | 2007-08-28 20:14:24 +0000 | [diff] [blame] | 4601 | return NewFD; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4602 | } |
| 4603 | |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 4604 | /// DiagnoseNontrivial - Given that a class has a non-trivial |
| 4605 | /// special member, figure out why. |
| 4606 | void Sema::DiagnoseNontrivial(const RecordType* T, CXXSpecialMember member) { |
| 4607 | QualType QT(T, 0U); |
| 4608 | CXXRecordDecl* RD = cast<CXXRecordDecl>(T->getDecl()); |
| 4609 | |
| 4610 | // Check whether the member was user-declared. |
| 4611 | switch (member) { |
| 4612 | case CXXDefaultConstructor: |
| 4613 | if (RD->hasUserDeclaredConstructor()) { |
| 4614 | typedef CXXRecordDecl::ctor_iterator ctor_iter; |
| 4615 | for (ctor_iter ci = RD->ctor_begin(), ce = RD->ctor_end(); ci != ce; ++ci) |
| 4616 | if (!ci->isImplicitlyDefined(Context)) { |
| 4617 | SourceLocation CtorLoc = ci->getLocation(); |
| 4618 | Diag(CtorLoc, diag::note_nontrivial_user_defined) << QT << member; |
| 4619 | return; |
| 4620 | } |
| 4621 | |
| 4622 | assert(0 && "found no user-declared constructors"); |
| 4623 | return; |
| 4624 | } |
| 4625 | break; |
| 4626 | |
| 4627 | case CXXCopyConstructor: |
| 4628 | if (RD->hasUserDeclaredCopyConstructor()) { |
| 4629 | SourceLocation CtorLoc = |
| 4630 | RD->getCopyConstructor(Context, 0)->getLocation(); |
| 4631 | Diag(CtorLoc, diag::note_nontrivial_user_defined) << QT << member; |
| 4632 | return; |
| 4633 | } |
| 4634 | break; |
| 4635 | |
| 4636 | case CXXCopyAssignment: |
| 4637 | if (RD->hasUserDeclaredCopyAssignment()) { |
| 4638 | // FIXME: this should use the location of the copy |
| 4639 | // assignment, not the type. |
| 4640 | SourceLocation TyLoc = RD->getSourceRange().getBegin(); |
| 4641 | Diag(TyLoc, diag::note_nontrivial_user_defined) << QT << member; |
| 4642 | return; |
| 4643 | } |
| 4644 | break; |
| 4645 | |
| 4646 | case CXXDestructor: |
| 4647 | if (RD->hasUserDeclaredDestructor()) { |
| 4648 | SourceLocation DtorLoc = RD->getDestructor(Context)->getLocation(); |
| 4649 | Diag(DtorLoc, diag::note_nontrivial_user_defined) << QT << member; |
| 4650 | return; |
| 4651 | } |
| 4652 | break; |
| 4653 | } |
| 4654 | |
| 4655 | typedef CXXRecordDecl::base_class_iterator base_iter; |
| 4656 | |
| 4657 | // Virtual bases and members inhibit trivial copying/construction, |
| 4658 | // but not trivial destruction. |
| 4659 | if (member != CXXDestructor) { |
| 4660 | // Check for virtual bases. vbases includes indirect virtual bases, |
| 4661 | // so we just iterate through the direct bases. |
| 4662 | for (base_iter bi = RD->bases_begin(), be = RD->bases_end(); bi != be; ++bi) |
| 4663 | if (bi->isVirtual()) { |
| 4664 | SourceLocation BaseLoc = bi->getSourceRange().getBegin(); |
| 4665 | Diag(BaseLoc, diag::note_nontrivial_has_virtual) << QT << 1; |
| 4666 | return; |
| 4667 | } |
| 4668 | |
| 4669 | // Check for virtual methods. |
| 4670 | typedef CXXRecordDecl::method_iterator meth_iter; |
| 4671 | for (meth_iter mi = RD->method_begin(), me = RD->method_end(); mi != me; |
| 4672 | ++mi) { |
| 4673 | if (mi->isVirtual()) { |
| 4674 | SourceLocation MLoc = mi->getSourceRange().getBegin(); |
| 4675 | Diag(MLoc, diag::note_nontrivial_has_virtual) << QT << 0; |
| 4676 | return; |
| 4677 | } |
| 4678 | } |
| 4679 | } |
| 4680 | |
| 4681 | bool (CXXRecordDecl::*hasTrivial)() const; |
| 4682 | switch (member) { |
| 4683 | case CXXDefaultConstructor: |
| 4684 | hasTrivial = &CXXRecordDecl::hasTrivialConstructor; break; |
| 4685 | case CXXCopyConstructor: |
| 4686 | hasTrivial = &CXXRecordDecl::hasTrivialCopyConstructor; break; |
| 4687 | case CXXCopyAssignment: |
| 4688 | hasTrivial = &CXXRecordDecl::hasTrivialCopyAssignment; break; |
| 4689 | case CXXDestructor: |
| 4690 | hasTrivial = &CXXRecordDecl::hasTrivialDestructor; break; |
| 4691 | default: |
| 4692 | assert(0 && "unexpected special member"); return; |
| 4693 | } |
| 4694 | |
| 4695 | // Check for nontrivial bases (and recurse). |
| 4696 | 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] | 4697 | const RecordType *BaseRT = bi->getType()->getAs<RecordType>(); |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 4698 | assert(BaseRT); |
| 4699 | CXXRecordDecl *BaseRecTy = cast<CXXRecordDecl>(BaseRT->getDecl()); |
| 4700 | if (!(BaseRecTy->*hasTrivial)()) { |
| 4701 | SourceLocation BaseLoc = bi->getSourceRange().getBegin(); |
| 4702 | Diag(BaseLoc, diag::note_nontrivial_has_nontrivial) << QT << 1 << member; |
| 4703 | DiagnoseNontrivial(BaseRT, member); |
| 4704 | return; |
| 4705 | } |
| 4706 | } |
| 4707 | |
| 4708 | // Check for nontrivial members (and recurse). |
| 4709 | typedef RecordDecl::field_iterator field_iter; |
| 4710 | for (field_iter fi = RD->field_begin(), fe = RD->field_end(); fi != fe; |
| 4711 | ++fi) { |
Douglas Gregor | 5e03f9e | 2009-07-23 23:49:00 +0000 | [diff] [blame] | 4712 | QualType EltTy = Context.getBaseElementType((*fi)->getType()); |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 4713 | if (const RecordType *EltRT = EltTy->getAs<RecordType>()) { |
Douglas Gregor | 1f2023a | 2009-07-22 18:25:24 +0000 | [diff] [blame] | 4714 | CXXRecordDecl* EltRD = cast<CXXRecordDecl>(EltRT->getDecl()); |
| 4715 | |
| 4716 | if (!(EltRD->*hasTrivial)()) { |
| 4717 | SourceLocation FLoc = (*fi)->getLocation(); |
| 4718 | Diag(FLoc, diag::note_nontrivial_has_nontrivial) << QT << 0 << member; |
| 4719 | DiagnoseNontrivial(EltRT, member); |
| 4720 | return; |
| 4721 | } |
| 4722 | } |
| 4723 | } |
| 4724 | |
| 4725 | assert(0 && "found no explanation for non-trivial member"); |
| 4726 | } |
| 4727 | |
Fariborz Jahanian | 89204a1 | 2007-10-01 16:53:59 +0000 | [diff] [blame] | 4728 | /// TranslateIvarVisibility - Translate visibility from a token ID to an |
| 4729 | /// AST enum value. |
Ted Kremenek | a526c5c | 2008-01-07 19:49:32 +0000 | [diff] [blame] | 4730 | static ObjCIvarDecl::AccessControl |
Fariborz Jahanian | 89204a1 | 2007-10-01 16:53:59 +0000 | [diff] [blame] | 4731 | TranslateIvarVisibility(tok::ObjCKeywordKind ivarVisibility) { |
Steve Naroff | f13271f | 2007-09-14 23:09:53 +0000 | [diff] [blame] | 4732 | switch (ivarVisibility) { |
Chris Lattner | 33d34a6 | 2008-10-12 00:28:42 +0000 | [diff] [blame] | 4733 | default: assert(0 && "Unknown visitibility kind"); |
| 4734 | case tok::objc_private: return ObjCIvarDecl::Private; |
| 4735 | case tok::objc_public: return ObjCIvarDecl::Public; |
| 4736 | case tok::objc_protected: return ObjCIvarDecl::Protected; |
| 4737 | case tok::objc_package: return ObjCIvarDecl::Package; |
Steve Naroff | f13271f | 2007-09-14 23:09:53 +0000 | [diff] [blame] | 4738 | } |
| 4739 | } |
| 4740 | |
Fariborz Jahanian | 45bc03f | 2008-04-11 16:55:42 +0000 | [diff] [blame] | 4741 | /// ActOnIvar - Each ivar field of an objective-c class is passed into this |
| 4742 | /// in order to create an IvarDecl object for it. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4743 | Sema::DeclPtrTy Sema::ActOnIvar(Scope *S, |
| 4744 | SourceLocation DeclStart, |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 4745 | DeclPtrTy IntfDecl, |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4746 | Declarator &D, ExprTy *BitfieldWidth, |
| 4747 | tok::ObjCKeywordKind Visibility) { |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 4748 | |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 4749 | IdentifierInfo *II = D.getIdentifier(); |
| 4750 | Expr *BitWidth = (Expr*)BitfieldWidth; |
| 4751 | SourceLocation Loc = DeclStart; |
| 4752 | if (II) Loc = D.getIdentifierLoc(); |
| 4753 | |
| 4754 | // FIXME: Unnamed fields can be handled in various different ways, for |
| 4755 | // example, unnamed unions inject all members into the struct namespace! |
| 4756 | |
Anders Carlsson | 9f1e572 | 2008-12-06 20:33:04 +0000 | [diff] [blame] | 4757 | QualType T = GetTypeForDeclarator(D, S); |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 4758 | |
| 4759 | if (BitWidth) { |
Steve Naroff | 63359c8 | 2009-02-20 17:57:11 +0000 | [diff] [blame] | 4760 | // 6.7.2.1p3, 6.7.2.1p4 |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 4761 | if (VerifyBitField(Loc, II, T, BitWidth)) { |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 4762 | D.setInvalidType(); |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 4763 | DeleteExpr(BitWidth); |
| 4764 | BitWidth = 0; |
| 4765 | } |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 4766 | } else { |
| 4767 | // Not a bitfield. |
| 4768 | |
| 4769 | // validate II. |
| 4770 | |
| 4771 | } |
| 4772 | |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 4773 | // C99 6.7.2.1p8: A member of a structure or union may have any type other |
| 4774 | // than a variably modified type. |
| 4775 | if (T->isVariablyModifiedType()) { |
Anders Carlsson | 96e05bc | 2008-12-07 00:20:55 +0000 | [diff] [blame] | 4776 | Diag(Loc, diag::err_typecheck_ivar_variable_size); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 4777 | D.setInvalidType(); |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 4778 | } |
| 4779 | |
Ted Kremenek | b8db21d | 2008-07-23 18:04:17 +0000 | [diff] [blame] | 4780 | // Get the visibility (access control) for this ivar. |
| 4781 | ObjCIvarDecl::AccessControl ac = |
| 4782 | Visibility != tok::objc_not_keyword ? TranslateIvarVisibility(Visibility) |
| 4783 | : ObjCIvarDecl::None; |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 4784 | // Must set ivar's DeclContext to its enclosing interface. |
| 4785 | Decl *EnclosingDecl = IntfDecl.getAs<Decl>(); |
| 4786 | DeclContext *EnclosingContext; |
| 4787 | if (ObjCImplementationDecl *IMPDecl = |
| 4788 | dyn_cast<ObjCImplementationDecl>(EnclosingDecl)) { |
| 4789 | // Case of ivar declared in an implementation. Context is that of its class. |
| 4790 | ObjCInterfaceDecl* IDecl = IMPDecl->getClassInterface(); |
| 4791 | assert(IDecl && "No class- ActOnIvar"); |
| 4792 | EnclosingContext = cast_or_null<DeclContext>(IDecl); |
Mike Stump | ac5fc7c | 2009-08-04 21:02:39 +0000 | [diff] [blame] | 4793 | } else |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 4794 | EnclosingContext = dyn_cast<DeclContext>(EnclosingDecl); |
| 4795 | assert(EnclosingContext && "null DeclContext for ivar - ActOnIvar"); |
| 4796 | |
Ted Kremenek | b8db21d | 2008-07-23 18:04:17 +0000 | [diff] [blame] | 4797 | // Construct the decl. |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 4798 | ObjCIvarDecl *NewID = ObjCIvarDecl::Create(Context, |
| 4799 | EnclosingContext, Loc, II, T,ac, |
Steve Naroff | 8f3b265 | 2008-07-16 18:22:22 +0000 | [diff] [blame] | 4800 | (Expr *)BitfieldWidth); |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 4801 | |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 4802 | if (II) { |
Douglas Gregor | 47b9a1c | 2009-02-04 17:27:36 +0000 | [diff] [blame] | 4803 | NamedDecl *PrevDecl = LookupName(S, II, LookupMemberName, true); |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 4804 | if (PrevDecl && isDeclInScope(PrevDecl, EnclosingContext, S) |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 4805 | && !isa<TagDecl>(PrevDecl)) { |
| 4806 | Diag(Loc, diag::err_duplicate_member) << II; |
| 4807 | Diag(PrevDecl->getLocation(), diag::note_previous_declaration); |
| 4808 | NewID->setInvalidDecl(); |
| 4809 | } |
| 4810 | } |
| 4811 | |
Ted Kremenek | b8db21d | 2008-07-23 18:04:17 +0000 | [diff] [blame] | 4812 | // Process attributes attached to the ivar. |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 4813 | ProcessDeclAttributes(S, NewID, D); |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 4814 | |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 4815 | if (D.isInvalidType()) |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 4816 | NewID->setInvalidDecl(); |
Ted Kremenek | b8db21d | 2008-07-23 18:04:17 +0000 | [diff] [blame] | 4817 | |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 4818 | if (II) { |
| 4819 | // FIXME: When interfaces are DeclContexts, we'll need to add |
| 4820 | // these to the interface. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4821 | S->AddDecl(DeclPtrTy::make(NewID)); |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 4822 | IdResolver.AddDecl(NewID); |
| 4823 | } |
| 4824 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4825 | return DeclPtrTy::make(NewID); |
Fariborz Jahanian | 1d78cc4 | 2008-04-10 23:32:45 +0000 | [diff] [blame] | 4826 | } |
| 4827 | |
Fariborz Jahanian | 9d048ff | 2007-09-29 00:54:24 +0000 | [diff] [blame] | 4828 | void Sema::ActOnFields(Scope* S, |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4829 | SourceLocation RecLoc, DeclPtrTy RecDecl, |
| 4830 | DeclPtrTy *Fields, unsigned NumFields, |
Daniel Dunbar | 1bfe1c2 | 2008-10-03 02:03:53 +0000 | [diff] [blame] | 4831 | SourceLocation LBrac, SourceLocation RBrac, |
Daniel Dunbar | 7d07664 | 2008-10-03 17:33:35 +0000 | [diff] [blame] | 4832 | AttributeList *Attr) { |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4833 | Decl *EnclosingDecl = RecDecl.getAs<Decl>(); |
Steve Naroff | 7421664 | 2007-09-14 22:20:54 +0000 | [diff] [blame] | 4834 | assert(EnclosingDecl && "missing record or interface decl"); |
Chris Lattner | 1829a6d | 2009-02-23 22:00:08 +0000 | [diff] [blame] | 4835 | |
| 4836 | // If the decl this is being inserted into is invalid, then it may be a |
| 4837 | // redeclaration or some other bogus case. Don't try to add fields to it. |
| 4838 | if (EnclosingDecl->isInvalidDecl()) { |
| 4839 | // FIXME: Deallocate fields? |
| 4840 | return; |
| 4841 | } |
| 4842 | |
Steve Naroff | 7421664 | 2007-09-14 22:20:54 +0000 | [diff] [blame] | 4843 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4844 | // Verify that all the fields are okay. |
| 4845 | unsigned NumNamedMembers = 0; |
| 4846 | llvm::SmallVector<FieldDecl*, 32> RecFields; |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 4847 | |
Chris Lattner | 1829a6d | 2009-02-23 22:00:08 +0000 | [diff] [blame] | 4848 | RecordDecl *Record = dyn_cast<RecordDecl>(EnclosingDecl); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4849 | for (unsigned i = 0; i != NumFields; ++i) { |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 4850 | FieldDecl *FD = cast<FieldDecl>(Fields[i].getAs<Decl>()); |
Steve Naroff | 7421664 | 2007-09-14 22:20:54 +0000 | [diff] [blame] | 4851 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4852 | // Get the type for the field. |
Chris Lattner | 02c642e | 2007-07-31 21:33:24 +0000 | [diff] [blame] | 4853 | Type *FDTy = FD->getType().getTypePtr(); |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 4854 | |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 4855 | if (!FD->isAnonymousStructOrUnion()) { |
Douglas Gregor | 6b3945f | 2009-01-07 19:46:03 +0000 | [diff] [blame] | 4856 | // Remember all fields written by the user. |
| 4857 | RecFields.push_back(FD); |
| 4858 | } |
Chris Lattner | 2479366 | 2009-03-05 22:45:59 +0000 | [diff] [blame] | 4859 | |
| 4860 | // If the field is already invalid for some reason, don't emit more |
| 4861 | // diagnostics about it. |
| 4862 | if (FD->isInvalidDecl()) |
| 4863 | continue; |
Steve Naroff | f13271f | 2007-09-14 23:09:53 +0000 | [diff] [blame] | 4864 | |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 4865 | // C99 6.7.2.1p2: |
| 4866 | // A structure or union shall not contain a member with |
| 4867 | // incomplete or function type (hence, a structure shall not |
| 4868 | // contain an instance of itself, but may contain a pointer to |
| 4869 | // an instance of itself), except that the last member of a |
| 4870 | // structure with more than one named member may have incomplete |
| 4871 | // array type; such a structure (and any union containing, |
| 4872 | // possibly recursively, a member that is such a structure) |
| 4873 | // shall not be a member of a structure or an element of an |
| 4874 | // array. |
Chris Lattner | 02c642e | 2007-07-31 21:33:24 +0000 | [diff] [blame] | 4875 | if (FDTy->isFunctionType()) { |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 4876 | // Field declared as a function. |
Chris Lattner | f3a41af | 2008-11-20 06:38:18 +0000 | [diff] [blame] | 4877 | Diag(FD->getLocation(), diag::err_field_declared_as_function) |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 4878 | << FD->getDeclName(); |
Steve Naroff | 7421664 | 2007-09-14 22:20:54 +0000 | [diff] [blame] | 4879 | FD->setInvalidDecl(); |
| 4880 | EnclosingDecl->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4881 | continue; |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 4882 | } else if (FDTy->isIncompleteArrayType() && i == NumFields - 1 && |
| 4883 | Record && Record->isStruct()) { |
| 4884 | // Flexible array member. |
| 4885 | if (NumNamedMembers < 1) { |
Chris Lattner | f3a41af | 2008-11-20 06:38:18 +0000 | [diff] [blame] | 4886 | Diag(FD->getLocation(), diag::err_flexible_array_empty_struct) |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 4887 | << FD->getDeclName(); |
Steve Naroff | 7421664 | 2007-09-14 22:20:54 +0000 | [diff] [blame] | 4888 | FD->setInvalidDecl(); |
| 4889 | EnclosingDecl->setInvalidDecl(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4890 | continue; |
| 4891 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4892 | // 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] | 4893 | if (Record) |
| 4894 | Record->setHasFlexibleArrayMember(true); |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 4895 | } else if (!FDTy->isDependentType() && |
| 4896 | RequireCompleteType(FD->getLocation(), FD->getType(), |
| 4897 | diag::err_field_incomplete)) { |
| 4898 | // Incomplete type |
| 4899 | FD->setInvalidDecl(); |
| 4900 | EnclosingDecl->setInvalidDecl(); |
| 4901 | continue; |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 4902 | } else if (const RecordType *FDTTy = FDTy->getAs<RecordType>()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4903 | if (FDTTy->getDecl()->hasFlexibleArrayMember()) { |
| 4904 | // 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] | 4905 | if (Record && Record->isUnion()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4906 | Record->setHasFlexibleArrayMember(true); |
| 4907 | } else { |
| 4908 | // If this is a struct/class and this is not the last element, reject |
| 4909 | // it. Note that GCC supports variable sized arrays in the middle of |
| 4910 | // structures. |
Douglas Gregor | e4f3e06 | 2009-03-06 23:41:27 +0000 | [diff] [blame] | 4911 | if (i != NumFields-1) |
| 4912 | Diag(FD->getLocation(), diag::ext_variable_sized_type_in_struct) |
Chris Lattner | 740782a | 2009-04-25 18:52:45 +0000 | [diff] [blame] | 4913 | << FD->getDeclName() << FD->getType(); |
Douglas Gregor | e4f3e06 | 2009-03-06 23:41:27 +0000 | [diff] [blame] | 4914 | else { |
| 4915 | // We support flexible arrays at the end of structs in |
| 4916 | // other structs as an extension. |
| 4917 | Diag(FD->getLocation(), diag::ext_flexible_array_in_struct) |
| 4918 | << FD->getDeclName(); |
| 4919 | if (Record) |
| 4920 | Record->setHasFlexibleArrayMember(true); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4921 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4922 | } |
| 4923 | } |
Fariborz Jahanian | 082b02e | 2009-07-08 01:18:33 +0000 | [diff] [blame] | 4924 | if (Record && FDTTy->getDecl()->hasObjectMember()) |
| 4925 | Record->setHasObjectMember(true); |
Douglas Gregor | e7450f5 | 2009-03-24 19:52:54 +0000 | [diff] [blame] | 4926 | } else if (FDTy->isObjCInterfaceType()) { |
| 4927 | /// A field cannot be an Objective-c object |
Steve Naroff | ccef371 | 2009-02-20 22:59:16 +0000 | [diff] [blame] | 4928 | Diag(FD->getLocation(), diag::err_statically_allocated_object); |
Fariborz Jahanian | e7f64cc | 2007-10-12 22:10:42 +0000 | [diff] [blame] | 4929 | FD->setInvalidDecl(); |
| 4930 | EnclosingDecl->setInvalidDecl(); |
| 4931 | continue; |
Mike Stump | ac5fc7c | 2009-08-04 21:02:39 +0000 | [diff] [blame] | 4932 | } else if (getLangOptions().ObjC1 && |
| 4933 | getLangOptions().getGCMode() != LangOptions::NonGC && |
| 4934 | Record && |
| 4935 | (FD->getType()->isObjCObjectPointerType() || |
| 4936 | FD->getType().isObjCGCStrong())) |
Fariborz Jahanian | 082b02e | 2009-07-08 01:18:33 +0000 | [diff] [blame] | 4937 | Record->setHasObjectMember(true); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4938 | // Keep track of the number of named members. |
Douglas Gregor | 72de667 | 2009-01-08 20:45:30 +0000 | [diff] [blame] | 4939 | if (FD->getIdentifier()) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4940 | ++NumNamedMembers; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4941 | } |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 4942 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4943 | // Okay, we successfully defined 'Record'. |
Chris Lattner | e1e7985 | 2008-02-06 00:51:33 +0000 | [diff] [blame] | 4944 | if (Record) { |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 4945 | Record->completeDefinition(Context); |
Chris Lattner | e1e7985 | 2008-02-06 00:51:33 +0000 | [diff] [blame] | 4946 | } else { |
Jay Foad | beaaccd | 2009-05-21 09:52:38 +0000 | [diff] [blame] | 4947 | ObjCIvarDecl **ClsFields = |
| 4948 | reinterpret_cast<ObjCIvarDecl**>(RecFields.data()); |
Fariborz Jahanian | 60f8c86 | 2008-12-13 20:28:25 +0000 | [diff] [blame] | 4949 | if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(EnclosingDecl)) { |
Chris Lattner | 38af2de | 2009-02-20 21:35:13 +0000 | [diff] [blame] | 4950 | ID->setIVarList(ClsFields, RecFields.size(), Context); |
| 4951 | ID->setLocEnd(RBrac); |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 4952 | // Add ivar's to class's DeclContext. |
| 4953 | for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { |
| 4954 | ClsFields[i]->setLexicalDeclContext(ID); |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 4955 | ID->addDecl(ClsFields[i]); |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 4956 | } |
Fariborz Jahanian | 3281eff | 2008-12-16 01:08:35 +0000 | [diff] [blame] | 4957 | // Must enforce the rule that ivars in the base classes may not be |
| 4958 | // duplicates. |
Fariborz Jahanian | 375d37c | 2008-12-17 22:21:44 +0000 | [diff] [blame] | 4959 | if (ID->getSuperClass()) { |
| 4960 | for (ObjCInterfaceDecl::ivar_iterator IVI = ID->ivar_begin(), |
| 4961 | IVE = ID->ivar_end(); IVI != IVE; ++IVI) { |
| 4962 | ObjCIvarDecl* Ivar = (*IVI); |
Daniel Dunbar | ad04e67 | 2009-05-03 01:08:28 +0000 | [diff] [blame] | 4963 | |
| 4964 | if (IdentifierInfo *II = Ivar->getIdentifier()) { |
| 4965 | ObjCIvarDecl* prevIvar = |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 4966 | ID->getSuperClass()->lookupInstanceVariable(II); |
Daniel Dunbar | ad04e67 | 2009-05-03 01:08:28 +0000 | [diff] [blame] | 4967 | if (prevIvar) { |
| 4968 | Diag(Ivar->getLocation(), diag::err_duplicate_member) << II; |
| 4969 | Diag(prevIvar->getLocation(), diag::note_previous_declaration); |
| 4970 | } |
Fariborz Jahanian | 3281eff | 2008-12-16 01:08:35 +0000 | [diff] [blame] | 4971 | } |
Fariborz Jahanian | 375d37c | 2008-12-17 22:21:44 +0000 | [diff] [blame] | 4972 | } |
Fariborz Jahanian | 3281eff | 2008-12-16 01:08:35 +0000 | [diff] [blame] | 4973 | } |
Chris Lattner | 1829a6d | 2009-02-23 22:00:08 +0000 | [diff] [blame] | 4974 | } else if (ObjCImplementationDecl *IMPDecl = |
| 4975 | dyn_cast<ObjCImplementationDecl>(EnclosingDecl)) { |
Ted Kremenek | a526c5c | 2008-01-07 19:49:32 +0000 | [diff] [blame] | 4976 | assert(IMPDecl && "ActOnFields - missing ObjCImplementationDecl"); |
Fariborz Jahanian | 496b5a8 | 2009-06-05 18:16:35 +0000 | [diff] [blame] | 4977 | for (unsigned I = 0, N = RecFields.size(); I != N; ++I) |
| 4978 | // Ivar declared in @implementation never belongs to the implementation. |
| 4979 | // Only it is in implementation's lexical context. |
Douglas Gregor | 8f36aba | 2009-04-23 03:23:08 +0000 | [diff] [blame] | 4980 | ClsFields[I]->setLexicalDeclContext(IMPDecl); |
Fariborz Jahanian | 3a3ca1b | 2007-10-31 18:48:14 +0000 | [diff] [blame] | 4981 | CheckImplementationIvars(IMPDecl, ClsFields, RecFields.size(), RBrac); |
Fariborz Jahanian | d0b90bf | 2007-09-26 18:27:25 +0000 | [diff] [blame] | 4982 | } |
Fariborz Jahanian | b04a021 | 2007-09-14 21:08:27 +0000 | [diff] [blame] | 4983 | } |
Daniel Dunbar | 7d07664 | 2008-10-03 17:33:35 +0000 | [diff] [blame] | 4984 | |
| 4985 | if (Attr) |
Douglas Gregor | 9cdda0c | 2009-06-17 21:51:59 +0000 | [diff] [blame] | 4986 | ProcessDeclAttributeList(S, Record, Attr); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 4987 | } |
| 4988 | |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 4989 | EnumConstantDecl *Sema::CheckEnumConstant(EnumDecl *Enum, |
| 4990 | EnumConstantDecl *LastEnumConst, |
| 4991 | SourceLocation IdLoc, |
| 4992 | IdentifierInfo *Id, |
| 4993 | ExprArg val) { |
| 4994 | Expr *Val = (Expr *)val.get(); |
| 4995 | |
| 4996 | llvm::APSInt EnumVal(32); |
| 4997 | QualType EltTy; |
| 4998 | if (Val && !Val->isTypeDependent()) { |
| 4999 | // Make sure to promote the operand type to int. |
| 5000 | UsualUnaryConversions(Val); |
| 5001 | if (Val != val.get()) { |
| 5002 | val.release(); |
| 5003 | val = Val; |
| 5004 | } |
| 5005 | |
| 5006 | // C99 6.7.2.2p2: Make sure we have an integer constant expression. |
| 5007 | SourceLocation ExpLoc; |
| 5008 | if (!Val->isValueDependent() && |
| 5009 | VerifyIntegerConstantExpression(Val, &EnumVal)) { |
| 5010 | Val = 0; |
| 5011 | } else { |
| 5012 | EltTy = Val->getType(); |
| 5013 | } |
| 5014 | } |
| 5015 | |
| 5016 | if (!Val) { |
| 5017 | if (LastEnumConst) { |
| 5018 | // Assign the last value + 1. |
| 5019 | EnumVal = LastEnumConst->getInitVal(); |
| 5020 | ++EnumVal; |
| 5021 | |
| 5022 | // Check for overflow on increment. |
| 5023 | if (EnumVal < LastEnumConst->getInitVal()) |
| 5024 | Diag(IdLoc, diag::warn_enum_value_overflow); |
| 5025 | |
| 5026 | EltTy = LastEnumConst->getType(); |
| 5027 | } else { |
| 5028 | // First value, set to zero. |
| 5029 | EltTy = Context.IntTy; |
| 5030 | EnumVal.zextOrTrunc(static_cast<uint32_t>(Context.getTypeSize(EltTy))); |
| 5031 | } |
| 5032 | } |
| 5033 | |
| 5034 | val.release(); |
| 5035 | return EnumConstantDecl::Create(Context, Enum, IdLoc, Id, EltTy, |
| 5036 | Val, EnumVal); |
| 5037 | } |
| 5038 | |
| 5039 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 5040 | Sema::DeclPtrTy Sema::ActOnEnumConstant(Scope *S, DeclPtrTy theEnumDecl, |
| 5041 | DeclPtrTy lastEnumConst, |
| 5042 | SourceLocation IdLoc, |
| 5043 | IdentifierInfo *Id, |
| 5044 | SourceLocation EqualLoc, ExprTy *val) { |
| 5045 | EnumDecl *TheEnumDecl = cast<EnumDecl>(theEnumDecl.getAs<Decl>()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5046 | EnumConstantDecl *LastEnumConst = |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 5047 | cast_or_null<EnumConstantDecl>(lastEnumConst.getAs<Decl>()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5048 | Expr *Val = static_cast<Expr*>(val); |
| 5049 | |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 5050 | // The scope passed in may not be a decl scope. Zip up the scope tree until |
| 5051 | // we find one that is. |
Douglas Gregor | 1a0d31a | 2009-01-12 18:45:55 +0000 | [diff] [blame] | 5052 | S = getNonFieldDeclScope(S); |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 5053 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5054 | // Verify that there isn't already something declared with this name in this |
| 5055 | // scope. |
Douglas Gregor | 47b9a1c | 2009-02-04 17:27:36 +0000 | [diff] [blame] | 5056 | NamedDecl *PrevDecl = LookupName(S, Id, LookupOrdinaryName); |
Douglas Gregor | f57172b | 2008-12-08 18:40:42 +0000 | [diff] [blame] | 5057 | if (PrevDecl && PrevDecl->isTemplateParameter()) { |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 5058 | // Maybe we will complain about the shadowed template parameter. |
| 5059 | DiagnoseTemplateParameterShadow(IdLoc, PrevDecl); |
| 5060 | // Just pretend that we didn't see the previous declaration. |
| 5061 | PrevDecl = 0; |
| 5062 | } |
| 5063 | |
| 5064 | if (PrevDecl) { |
Argyrios Kyrtzidis | 0ff12f0 | 2008-07-16 21:01:53 +0000 | [diff] [blame] | 5065 | // When in C++, we may get a TagDecl with the same name; in this case the |
| 5066 | // enum constant will 'hide' the tag. |
| 5067 | assert((getLangOptions().CPlusPlus || !isa<TagDecl>(PrevDecl)) && |
| 5068 | "Received TagDecl when not in C++!"); |
Argyrios Kyrtzidis | 15a12d0 | 2008-09-09 21:18:04 +0000 | [diff] [blame] | 5069 | if (!isa<TagDecl>(PrevDecl) && isDeclInScope(PrevDecl, CurContext, S)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5070 | if (isa<EnumConstantDecl>(PrevDecl)) |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 5071 | Diag(IdLoc, diag::err_redefinition_of_enumerator) << Id; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5072 | else |
Chris Lattner | 3c73c41 | 2008-11-19 08:23:25 +0000 | [diff] [blame] | 5073 | Diag(IdLoc, diag::err_redefinition) << Id; |
Chris Lattner | 5f4a682 | 2008-11-23 23:12:31 +0000 | [diff] [blame] | 5074 | Diag(PrevDecl->getLocation(), diag::note_previous_definition); |
Chris Lattner | f306f86 | 2009-02-28 19:37:57 +0000 | [diff] [blame] | 5075 | if (Val) Val->Destroy(Context); |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 5076 | return DeclPtrTy(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5077 | } |
| 5078 | } |
| 5079 | |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 5080 | EnumConstantDecl *New = CheckEnumConstant(TheEnumDecl, LastEnumConst, |
| 5081 | IdLoc, Id, Owned(Val)); |
Chris Lattner | 421a23d | 2007-08-27 21:16:18 +0000 | [diff] [blame] | 5082 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5083 | // Register this decl in the current scope stack. |
Douglas Gregor | 879fd49 | 2009-03-17 19:05:46 +0000 | [diff] [blame] | 5084 | if (New) |
| 5085 | PushOnScopeChains(New, S); |
Douglas Gregor | 45579f5 | 2008-12-17 02:04:30 +0000 | [diff] [blame] | 5086 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 5087 | return DeclPtrTy::make(New); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5088 | } |
| 5089 | |
Mike Stump | c6e35aa | 2009-05-16 07:06:02 +0000 | [diff] [blame] | 5090 | void Sema::ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, |
| 5091 | SourceLocation RBraceLoc, DeclPtrTy EnumDeclX, |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 5092 | DeclPtrTy *Elements, unsigned NumElements, |
| 5093 | Scope *S, AttributeList *Attr) { |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 5094 | EnumDecl *Enum = cast<EnumDecl>(EnumDeclX.getAs<Decl>()); |
Douglas Gregor | 074149e | 2009-01-05 19:45:36 +0000 | [diff] [blame] | 5095 | QualType EnumType = Context.getTypeDeclType(Enum); |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 5096 | |
| 5097 | if (Attr) |
| 5098 | ProcessDeclAttributeList(S, Enum, Attr); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5099 | |
Chris Lattner | e37f0be | 2007-08-28 05:10:31 +0000 | [diff] [blame] | 5100 | // TODO: If the result value doesn't fit in an int, it must be a long or long |
| 5101 | // long value. ISO C does not support this, but GCC does as an extension, |
| 5102 | // emit a warning. |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 5103 | unsigned IntWidth = Context.Target.getIntWidth(); |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 5104 | unsigned CharWidth = Context.Target.getCharWidth(); |
| 5105 | unsigned ShortWidth = Context.Target.getShortWidth(); |
Chris Lattner | e37f0be | 2007-08-28 05:10:31 +0000 | [diff] [blame] | 5106 | |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 5107 | // Verify that all the values are okay, compute the size of the values, and |
| 5108 | // reverse the list. |
| 5109 | unsigned NumNegativeBits = 0; |
| 5110 | unsigned NumPositiveBits = 0; |
| 5111 | |
| 5112 | // Keep track of whether all elements have type int. |
| 5113 | bool AllElementsInt = true; |
| 5114 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5115 | for (unsigned i = 0; i != NumElements; ++i) { |
| 5116 | EnumConstantDecl *ECD = |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 5117 | cast_or_null<EnumConstantDecl>(Elements[i].getAs<Decl>()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5118 | if (!ECD) continue; // Already issued a diagnostic. |
Chris Lattner | 211a30e | 2007-08-28 05:27:00 +0000 | [diff] [blame] | 5119 | |
| 5120 | // If the enum value doesn't fit in an int, emit an extension warning. |
Chris Lattner | 211a30e | 2007-08-28 05:27:00 +0000 | [diff] [blame] | 5121 | const llvm::APSInt &InitVal = ECD->getInitVal(); |
Chris Lattner | a73349d | 2008-02-26 00:33:57 +0000 | [diff] [blame] | 5122 | assert(InitVal.getBitWidth() >= IntWidth && |
| 5123 | "Should have promoted value to int"); |
Chris Lattner | 211a30e | 2007-08-28 05:27:00 +0000 | [diff] [blame] | 5124 | if (InitVal.getBitWidth() > IntWidth) { |
| 5125 | llvm::APSInt V(InitVal); |
| 5126 | V.trunc(IntWidth); |
| 5127 | V.extend(InitVal.getBitWidth()); |
| 5128 | if (V != InitVal) |
Chris Lattner | f3a41af | 2008-11-20 06:38:18 +0000 | [diff] [blame] | 5129 | Diag(ECD->getLocation(), diag::ext_enum_value_not_int) |
| 5130 | << InitVal.toString(10); |
Chris Lattner | 211a30e | 2007-08-28 05:27:00 +0000 | [diff] [blame] | 5131 | } |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 5132 | |
| 5133 | // Keep track of the size of positive and negative values. |
Chris Lattner | a73349d | 2008-02-26 00:33:57 +0000 | [diff] [blame] | 5134 | if (InitVal.isUnsigned() || InitVal.isNonNegative()) |
Chris Lattner | 21dd821 | 2008-01-14 21:47:29 +0000 | [diff] [blame] | 5135 | NumPositiveBits = std::max(NumPositiveBits, |
| 5136 | (unsigned)InitVal.getActiveBits()); |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 5137 | else |
Chris Lattner | 21dd821 | 2008-01-14 21:47:29 +0000 | [diff] [blame] | 5138 | NumNegativeBits = std::max(NumNegativeBits, |
| 5139 | (unsigned)InitVal.getMinSignedBits()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5140 | |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 5141 | // Keep track of whether every enum element has type int (very commmon). |
| 5142 | if (AllElementsInt) |
| 5143 | AllElementsInt = ECD->getType() == Context.IntTy; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5144 | } |
| 5145 | |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 5146 | // Figure out the type that should be used for this enum. |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 5147 | // FIXME: Support -fshort-enums. |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 5148 | QualType BestType; |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 5149 | unsigned BestWidth; |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 5150 | |
| 5151 | bool Packed = Enum->getAttr<PackedAttr>() ? true : false; |
| 5152 | |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 5153 | if (NumNegativeBits) { |
| 5154 | // If there is a negative value, figure out the smallest integer type (of |
| 5155 | // int/long/longlong) that fits. |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 5156 | // If it's packed, check also if it fits a char or a short. |
| 5157 | if (Packed && NumNegativeBits <= CharWidth && NumPositiveBits < CharWidth) { |
| 5158 | BestType = Context.SignedCharTy; |
| 5159 | BestWidth = CharWidth; |
| 5160 | } else if (Packed && NumNegativeBits <= ShortWidth && |
| 5161 | NumPositiveBits < ShortWidth) { |
| 5162 | BestType = Context.ShortTy; |
| 5163 | BestWidth = ShortWidth; |
| 5164 | } |
| 5165 | else if (NumNegativeBits <= IntWidth && NumPositiveBits < IntWidth) { |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 5166 | BestType = Context.IntTy; |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 5167 | BestWidth = IntWidth; |
| 5168 | } else { |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 5169 | BestWidth = Context.Target.getLongWidth(); |
Ted Kremenek | 9c728dc | 2007-12-12 22:39:36 +0000 | [diff] [blame] | 5170 | |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 5171 | if (NumNegativeBits <= BestWidth && NumPositiveBits < BestWidth) |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 5172 | BestType = Context.LongTy; |
| 5173 | else { |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 5174 | BestWidth = Context.Target.getLongLongWidth(); |
Ted Kremenek | 9c728dc | 2007-12-12 22:39:36 +0000 | [diff] [blame] | 5175 | |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 5176 | if (NumNegativeBits > BestWidth || NumPositiveBits >= BestWidth) |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 5177 | Diag(Enum->getLocation(), diag::warn_enum_too_large); |
| 5178 | BestType = Context.LongLongTy; |
| 5179 | } |
| 5180 | } |
| 5181 | } else { |
| 5182 | // If there is no negative value, figure out which of uint, ulong, ulonglong |
| 5183 | // fits. |
Edward O'Callaghan | fee1381 | 2009-08-08 14:36:57 +0000 | [diff] [blame] | 5184 | // If it's packed, check also if it fits a char or a short. |
| 5185 | if (Packed && NumPositiveBits <= CharWidth) { |
| 5186 | BestType = Context.UnsignedCharTy; |
| 5187 | BestWidth = CharWidth; |
| 5188 | } else if (Packed && NumPositiveBits <= ShortWidth) { |
| 5189 | BestType = Context.UnsignedShortTy; |
| 5190 | BestWidth = ShortWidth; |
| 5191 | } |
| 5192 | else if (NumPositiveBits <= IntWidth) { |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 5193 | BestType = Context.UnsignedIntTy; |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 5194 | BestWidth = IntWidth; |
| 5195 | } else if (NumPositiveBits <= |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 5196 | (BestWidth = Context.Target.getLongWidth())) { |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 5197 | BestType = Context.UnsignedLongTy; |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 5198 | } else { |
| 5199 | BestWidth = Context.Target.getLongLongWidth(); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 5200 | assert(NumPositiveBits <= BestWidth && |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 5201 | "How could an initializer get larger than ULL?"); |
| 5202 | BestType = Context.UnsignedLongLongTy; |
| 5203 | } |
| 5204 | } |
| 5205 | |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 5206 | // Loop over all of the enumerator constants, changing their types to match |
| 5207 | // the type of the enum if needed. |
| 5208 | for (unsigned i = 0; i != NumElements; ++i) { |
| 5209 | EnumConstantDecl *ECD = |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 5210 | cast_or_null<EnumConstantDecl>(Elements[i].getAs<Decl>()); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 5211 | if (!ECD) continue; // Already issued a diagnostic. |
| 5212 | |
| 5213 | // Standard C says the enumerators have int type, but we allow, as an |
| 5214 | // extension, the enumerators to be larger than int size. If each |
| 5215 | // enumerator value fits in an int, type it as an int, otherwise type it the |
| 5216 | // same as the enumerator decl itself. This means that in "enum { X = 1U }" |
| 5217 | // that X has type 'int', not 'unsigned'. |
Chris Lattner | a73349d | 2008-02-26 00:33:57 +0000 | [diff] [blame] | 5218 | if (ECD->getType() == Context.IntTy) { |
| 5219 | // Make sure the init value is signed. |
| 5220 | llvm::APSInt IV = ECD->getInitVal(); |
| 5221 | IV.setIsSigned(true); |
| 5222 | ECD->setInitVal(IV); |
Douglas Gregor | c9467cf | 2008-12-12 02:00:36 +0000 | [diff] [blame] | 5223 | |
| 5224 | if (getLangOptions().CPlusPlus) |
| 5225 | // C++ [dcl.enum]p4: Following the closing brace of an |
| 5226 | // enum-specifier, each enumerator has the type of its |
| 5227 | // enumeration. |
| 5228 | ECD->setType(EnumType); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 5229 | continue; // Already int type. |
Chris Lattner | a73349d | 2008-02-26 00:33:57 +0000 | [diff] [blame] | 5230 | } |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 5231 | |
| 5232 | // Determine whether the value fits into an int. |
| 5233 | llvm::APSInt InitVal = ECD->getInitVal(); |
| 5234 | bool FitsInInt; |
| 5235 | if (InitVal.isUnsigned() || !InitVal.isNegative()) |
| 5236 | FitsInInt = InitVal.getActiveBits() < IntWidth; |
| 5237 | else |
| 5238 | FitsInInt = InitVal.getMinSignedBits() <= IntWidth; |
| 5239 | |
| 5240 | // If it fits into an integer type, force it. Otherwise force it to match |
| 5241 | // the enum decl type. |
| 5242 | QualType NewTy; |
| 5243 | unsigned NewWidth; |
| 5244 | bool NewSign; |
| 5245 | if (FitsInInt) { |
| 5246 | NewTy = Context.IntTy; |
| 5247 | NewWidth = IntWidth; |
| 5248 | NewSign = true; |
| 5249 | } else if (ECD->getType() == BestType) { |
| 5250 | // Already the right type! |
Douglas Gregor | c9467cf | 2008-12-12 02:00:36 +0000 | [diff] [blame] | 5251 | if (getLangOptions().CPlusPlus) |
| 5252 | // C++ [dcl.enum]p4: Following the closing brace of an |
| 5253 | // enum-specifier, each enumerator has the type of its |
| 5254 | // enumeration. |
| 5255 | ECD->setType(EnumType); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 5256 | continue; |
| 5257 | } else { |
| 5258 | NewTy = BestType; |
| 5259 | NewWidth = BestWidth; |
| 5260 | NewSign = BestType->isSignedIntegerType(); |
| 5261 | } |
| 5262 | |
| 5263 | // Adjust the APSInt value. |
| 5264 | InitVal.extOrTrunc(NewWidth); |
| 5265 | InitVal.setIsSigned(NewSign); |
| 5266 | ECD->setInitVal(InitVal); |
| 5267 | |
| 5268 | // Adjust the Expr initializer and type. |
Chris Lattner | 13fd416 | 2009-01-15 19:19:42 +0000 | [diff] [blame] | 5269 | if (ECD->getInitExpr()) |
Anders Carlsson | cdef2b7 | 2009-07-31 00:48:10 +0000 | [diff] [blame] | 5270 | ECD->setInitExpr(new (Context) ImplicitCastExpr(NewTy, |
| 5271 | CastExpr::CK_Unknown, |
| 5272 | ECD->getInitExpr(), |
Ted Kremenek | 8189cde | 2009-02-07 01:47:29 +0000 | [diff] [blame] | 5273 | /*isLvalue=*/false)); |
Douglas Gregor | c9467cf | 2008-12-12 02:00:36 +0000 | [diff] [blame] | 5274 | if (getLangOptions().CPlusPlus) |
| 5275 | // C++ [dcl.enum]p4: Following the closing brace of an |
| 5276 | // enum-specifier, each enumerator has the type of its |
| 5277 | // enumeration. |
| 5278 | ECD->setType(EnumType); |
| 5279 | else |
| 5280 | ECD->setType(NewTy); |
Chris Lattner | b7f6e08 | 2007-08-29 17:31:48 +0000 | [diff] [blame] | 5281 | } |
Chris Lattner | ac60968 | 2007-08-28 06:15:15 +0000 | [diff] [blame] | 5282 | |
Douglas Gregor | 44b4321 | 2008-12-11 16:49:14 +0000 | [diff] [blame] | 5283 | Enum->completeDefinition(Context, BestType); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 5284 | } |
| 5285 | |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 5286 | Sema::DeclPtrTy Sema::ActOnFileScopeAsmDecl(SourceLocation Loc, |
| 5287 | ExprArg expr) { |
Anders Carlsson | f1b1d59 | 2009-05-01 19:30:39 +0000 | [diff] [blame] | 5288 | StringLiteral *AsmString = cast<StringLiteral>(expr.takeAs<Expr>()); |
Sebastian Redl | 798d119 | 2008-12-13 16:23:55 +0000 | [diff] [blame] | 5289 | |
Douglas Gregor | 4fe0c8e | 2009-05-30 00:08:05 +0000 | [diff] [blame] | 5290 | FileScopeAsmDecl *New = FileScopeAsmDecl::Create(Context, CurContext, |
| 5291 | Loc, AsmString); |
Argyrios Kyrtzidis | 17945a0 | 2009-06-30 02:36:12 +0000 | [diff] [blame] | 5292 | CurContext->addDecl(New); |
Douglas Gregor | 4fe0c8e | 2009-05-30 00:08:05 +0000 | [diff] [blame] | 5293 | return DeclPtrTy::make(New); |
Anders Carlsson | dfab6cb | 2008-02-08 00:33:21 +0000 | [diff] [blame] | 5294 | } |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 5295 | |
| 5296 | void Sema::ActOnPragmaWeakID(IdentifierInfo* Name, |
| 5297 | SourceLocation PragmaLoc, |
| 5298 | SourceLocation NameLoc) { |
| 5299 | Decl *PrevDecl = LookupName(TUScope, Name, LookupOrdinaryName); |
| 5300 | |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 5301 | if (PrevDecl) { |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 5302 | PrevDecl->addAttr(::new (Context) WeakAttr()); |
Ryan Flynn | e25ff83 | 2009-07-30 03:15:39 +0000 | [diff] [blame] | 5303 | } else { |
| 5304 | (void)WeakUndeclaredIdentifiers.insert( |
| 5305 | std::pair<IdentifierInfo*,WeakInfo> |
| 5306 | (Name, WeakInfo((IdentifierInfo*)0, NameLoc))); |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 5307 | } |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 5308 | } |
| 5309 | |
| 5310 | void Sema::ActOnPragmaWeakAlias(IdentifierInfo* Name, |
| 5311 | IdentifierInfo* AliasName, |
| 5312 | SourceLocation PragmaLoc, |
| 5313 | SourceLocation NameLoc, |
| 5314 | SourceLocation AliasNameLoc) { |
Ryan Flynn | e25ff83 | 2009-07-30 03:15:39 +0000 | [diff] [blame] | 5315 | Decl *PrevDecl = LookupName(TUScope, AliasName, LookupOrdinaryName); |
| 5316 | WeakInfo W = WeakInfo(Name, NameLoc); |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 5317 | |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 5318 | if (PrevDecl) { |
Ryan Flynn | e25ff83 | 2009-07-30 03:15:39 +0000 | [diff] [blame] | 5319 | if (!PrevDecl->hasAttr<AliasAttr>()) |
| 5320 | if (NamedDecl *ND = dyn_cast<NamedDecl>(PrevDecl)) |
Ryan Flynn | 7b1fdbd | 2009-07-31 02:52:19 +0000 | [diff] [blame] | 5321 | DeclApplyPragmaWeak(TUScope, ND, W); |
Ryan Flynn | e25ff83 | 2009-07-30 03:15:39 +0000 | [diff] [blame] | 5322 | } else { |
| 5323 | (void)WeakUndeclaredIdentifiers.insert( |
| 5324 | std::pair<IdentifierInfo*,WeakInfo>(AliasName, W)); |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 5325 | } |
Eli Friedman | c49f19b | 2009-06-05 02:44:36 +0000 | [diff] [blame] | 5326 | } |