Cedric Venet | 3d65864 | 2009-02-14 20:20:19 +0000 | [diff] [blame] | 1 | //===--- SemaCXXScopeSpec.cpp - Semantic Analysis for C++ scope specifiers-===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file implements C++ semantic analysis for scope specifiers. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "Sema.h" |
| 15 | #include "clang/AST/ASTContext.h" |
Douglas Gregor | 42af25f | 2009-05-11 19:58:34 +0000 | [diff] [blame] | 16 | #include "clang/AST/DeclTemplate.h" |
Douglas Gregor | fe85ced | 2009-08-06 03:17:00 +0000 | [diff] [blame] | 17 | #include "clang/AST/ExprCXX.h" |
Douglas Gregor | e4e5b05 | 2009-03-19 00:18:19 +0000 | [diff] [blame] | 18 | #include "clang/AST/NestedNameSpecifier.h" |
Anders Carlsson | b790661 | 2009-08-26 23:45:07 +0000 | [diff] [blame^] | 19 | #include "clang/Basic/PartialDiagnostic.h" |
Cedric Venet | 3d65864 | 2009-02-14 20:20:19 +0000 | [diff] [blame] | 20 | #include "clang/Parse/DeclSpec.h" |
| 21 | #include "llvm/ADT/STLExtras.h" |
Douglas Gregor | 7551c18 | 2009-07-22 00:28:09 +0000 | [diff] [blame] | 22 | #include "llvm/Support/raw_ostream.h" |
Cedric Venet | 3d65864 | 2009-02-14 20:20:19 +0000 | [diff] [blame] | 23 | using namespace clang; |
| 24 | |
Douglas Gregor | e4e5b05 | 2009-03-19 00:18:19 +0000 | [diff] [blame] | 25 | /// \brief Compute the DeclContext that is associated with the given |
| 26 | /// scope specifier. |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 27 | /// |
| 28 | /// \param SS the C++ scope specifier as it appears in the source |
| 29 | /// |
| 30 | /// \param EnteringContext when true, we will be entering the context of |
| 31 | /// this scope specifier, so we can retrieve the declaration context of a |
| 32 | /// class template or class template partial specialization even if it is |
| 33 | /// not the current instantiation. |
| 34 | /// |
| 35 | /// \returns the declaration context represented by the scope specifier @p SS, |
| 36 | /// or NULL if the declaration context cannot be computed (e.g., because it is |
| 37 | /// dependent and not the current instantiation). |
| 38 | DeclContext *Sema::computeDeclContext(const CXXScopeSpec &SS, |
| 39 | bool EnteringContext) { |
Douglas Gregor | e4e5b05 | 2009-03-19 00:18:19 +0000 | [diff] [blame] | 40 | if (!SS.isSet() || SS.isInvalid()) |
Douglas Gregor | ca5e77f | 2009-03-18 00:36:05 +0000 | [diff] [blame] | 41 | return 0; |
Douglas Gregor | ca5e77f | 2009-03-18 00:36:05 +0000 | [diff] [blame] | 42 | |
Douglas Gregor | ab452ba | 2009-03-26 23:50:42 +0000 | [diff] [blame] | 43 | NestedNameSpecifier *NNS |
Douglas Gregor | 3507369 | 2009-03-26 23:56:24 +0000 | [diff] [blame] | 44 | = static_cast<NestedNameSpecifier *>(SS.getScopeRep()); |
Douglas Gregor | 42af25f | 2009-05-11 19:58:34 +0000 | [diff] [blame] | 45 | if (NNS->isDependent()) { |
| 46 | // If this nested-name-specifier refers to the current |
| 47 | // instantiation, return its DeclContext. |
| 48 | if (CXXRecordDecl *Record = getCurrentInstantiationOf(NNS)) |
| 49 | return Record; |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 50 | |
| 51 | if (EnteringContext) { |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 52 | if (const TemplateSpecializationType *SpecType |
| 53 | = dyn_cast_or_null<TemplateSpecializationType>(NNS->getAsType())) { |
Douglas Gregor | 495c35d | 2009-08-25 22:51:20 +0000 | [diff] [blame] | 54 | // We are entering the context of the nested name specifier, so try to |
| 55 | // match the nested name specifier to either a primary class template |
| 56 | // or a class template partial specialization. |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 57 | if (ClassTemplateDecl *ClassTemplate |
| 58 | = dyn_cast_or_null<ClassTemplateDecl>( |
| 59 | SpecType->getTemplateName().getAsTemplateDecl())) { |
Douglas Gregor | b88e888 | 2009-07-30 17:40:51 +0000 | [diff] [blame] | 60 | QualType ContextType |
| 61 | = Context.getCanonicalType(QualType(SpecType, 0)); |
| 62 | |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 63 | // If the type of the nested name specifier is the same as the |
| 64 | // injected class name of the named class template, we're entering |
| 65 | // into that class template definition. |
| 66 | QualType Injected = ClassTemplate->getInjectedClassNameType(Context); |
Douglas Gregor | b88e888 | 2009-07-30 17:40:51 +0000 | [diff] [blame] | 67 | if (Context.hasSameType(Injected, ContextType)) |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 68 | return ClassTemplate->getTemplatedDecl(); |
| 69 | |
Douglas Gregor | b88e888 | 2009-07-30 17:40:51 +0000 | [diff] [blame] | 70 | // If the type of the nested name specifier is the same as the |
| 71 | // type of one of the class template's class template partial |
| 72 | // specializations, we're entering into the definition of that |
| 73 | // class template partial specialization. |
| 74 | if (ClassTemplatePartialSpecializationDecl *PartialSpec |
| 75 | = ClassTemplate->findPartialSpecialization(ContextType)) |
| 76 | return PartialSpec; |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 77 | } |
Douglas Gregor | 495c35d | 2009-08-25 22:51:20 +0000 | [diff] [blame] | 78 | } else if (const RecordType *RecordT |
| 79 | = dyn_cast_or_null<RecordType>(NNS->getAsType())) { |
| 80 | // The nested name specifier refers to a member of a class template. |
| 81 | return RecordT->getDecl(); |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 82 | } |
| 83 | } |
| 84 | |
| 85 | return 0; |
Douglas Gregor | 42af25f | 2009-05-11 19:58:34 +0000 | [diff] [blame] | 86 | } |
Douglas Gregor | ab452ba | 2009-03-26 23:50:42 +0000 | [diff] [blame] | 87 | |
| 88 | switch (NNS->getKind()) { |
| 89 | case NestedNameSpecifier::Identifier: |
| 90 | assert(false && "Dependent nested-name-specifier has no DeclContext"); |
| 91 | break; |
| 92 | |
| 93 | case NestedNameSpecifier::Namespace: |
| 94 | return NNS->getAsNamespace(); |
| 95 | |
| 96 | case NestedNameSpecifier::TypeSpec: |
| 97 | case NestedNameSpecifier::TypeSpecWithTemplate: { |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 98 | const TagType *Tag = NNS->getAsType()->getAs<TagType>(); |
Douglas Gregor | ab452ba | 2009-03-26 23:50:42 +0000 | [diff] [blame] | 99 | assert(Tag && "Non-tag type in nested-name-specifier"); |
| 100 | return Tag->getDecl(); |
| 101 | } break; |
| 102 | |
| 103 | case NestedNameSpecifier::Global: |
| 104 | return Context.getTranslationUnitDecl(); |
| 105 | } |
| 106 | |
| 107 | // Required to silence a GCC warning. |
| 108 | return 0; |
Douglas Gregor | ca5e77f | 2009-03-18 00:36:05 +0000 | [diff] [blame] | 109 | } |
| 110 | |
Douglas Gregor | 5953d8b | 2009-03-19 17:26:29 +0000 | [diff] [blame] | 111 | bool Sema::isDependentScopeSpecifier(const CXXScopeSpec &SS) { |
| 112 | if (!SS.isSet() || SS.isInvalid()) |
| 113 | return false; |
| 114 | |
Douglas Gregor | ab452ba | 2009-03-26 23:50:42 +0000 | [diff] [blame] | 115 | NestedNameSpecifier *NNS |
Douglas Gregor | 3507369 | 2009-03-26 23:56:24 +0000 | [diff] [blame] | 116 | = static_cast<NestedNameSpecifier *>(SS.getScopeRep()); |
Douglas Gregor | ab452ba | 2009-03-26 23:50:42 +0000 | [diff] [blame] | 117 | return NNS->isDependent(); |
Douglas Gregor | 5953d8b | 2009-03-19 17:26:29 +0000 | [diff] [blame] | 118 | } |
| 119 | |
Douglas Gregor | 42af25f | 2009-05-11 19:58:34 +0000 | [diff] [blame] | 120 | // \brief Determine whether this C++ scope specifier refers to an |
| 121 | // unknown specialization, i.e., a dependent type that is not the |
| 122 | // current instantiation. |
| 123 | bool Sema::isUnknownSpecialization(const CXXScopeSpec &SS) { |
| 124 | if (!isDependentScopeSpecifier(SS)) |
| 125 | return false; |
| 126 | |
| 127 | NestedNameSpecifier *NNS |
| 128 | = static_cast<NestedNameSpecifier *>(SS.getScopeRep()); |
| 129 | return getCurrentInstantiationOf(NNS) == 0; |
| 130 | } |
| 131 | |
| 132 | /// \brief If the given nested name specifier refers to the current |
| 133 | /// instantiation, return the declaration that corresponds to that |
| 134 | /// current instantiation (C++0x [temp.dep.type]p1). |
| 135 | /// |
| 136 | /// \param NNS a dependent nested name specifier. |
| 137 | CXXRecordDecl *Sema::getCurrentInstantiationOf(NestedNameSpecifier *NNS) { |
| 138 | assert(getLangOptions().CPlusPlus && "Only callable in C++"); |
| 139 | assert(NNS->isDependent() && "Only dependent nested-name-specifier allowed"); |
| 140 | |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 141 | if (!NNS->getAsType()) |
| 142 | return 0; |
| 143 | |
Douglas Gregor | 1560def | 2009-07-31 18:32:42 +0000 | [diff] [blame] | 144 | QualType T = QualType(NNS->getAsType(), 0); |
Douglas Gregor | 42af25f | 2009-05-11 19:58:34 +0000 | [diff] [blame] | 145 | // If the nested name specifier does not refer to a type, then it |
| 146 | // does not refer to the current instantiation. |
| 147 | if (T.isNull()) |
| 148 | return 0; |
| 149 | |
| 150 | T = Context.getCanonicalType(T); |
| 151 | |
| 152 | for (DeclContext *Ctx = CurContext; Ctx; Ctx = Ctx->getParent()) { |
| 153 | // If we've hit a namespace or the global scope, then the |
| 154 | // nested-name-specifier can't refer to the current instantiation. |
| 155 | if (Ctx->isFileContext()) |
| 156 | return 0; |
| 157 | |
| 158 | // Skip non-class contexts. |
| 159 | CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(Ctx); |
| 160 | if (!Record) |
| 161 | continue; |
| 162 | |
| 163 | // If this record type is not dependent, |
| 164 | if (!Record->isDependentType()) |
| 165 | return 0; |
| 166 | |
| 167 | // C++ [temp.dep.type]p1: |
| 168 | // |
| 169 | // In the definition of a class template, a nested class of a |
| 170 | // class template, a member of a class template, or a member of a |
| 171 | // nested class of a class template, a name refers to the current |
| 172 | // instantiation if it is |
| 173 | // -- the injected-class-name (9) of the class template or |
| 174 | // nested class, |
| 175 | // -- in the definition of a primary class template, the name |
| 176 | // of the class template followed by the template argument |
| 177 | // list of the primary template (as described below) |
| 178 | // enclosed in <>, |
| 179 | // -- in the definition of a nested class of a class template, |
| 180 | // the name of the nested class referenced as a member of |
| 181 | // the current instantiation, or |
| 182 | // -- in the definition of a partial specialization, the name |
| 183 | // of the class template followed by the template argument |
| 184 | // list of the partial specialization enclosed in <>. If |
| 185 | // the nth template parameter is a parameter pack, the nth |
| 186 | // template argument is a pack expansion (14.6.3) whose |
Douglas Gregor | c5b8c9b | 2009-07-30 17:50:56 +0000 | [diff] [blame] | 187 | // pattern is the name of the parameter pack. |
| 188 | // (FIXME: parameter packs) |
Douglas Gregor | 42af25f | 2009-05-11 19:58:34 +0000 | [diff] [blame] | 189 | // |
| 190 | // All of these options come down to having the |
| 191 | // nested-name-specifier type that is equivalent to the |
| 192 | // injected-class-name of one of the types that is currently in |
| 193 | // our context. |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 194 | if (Context.getCanonicalType(Context.getTypeDeclType(Record)) == T) |
Douglas Gregor | 42af25f | 2009-05-11 19:58:34 +0000 | [diff] [blame] | 195 | return Record; |
| 196 | |
| 197 | if (ClassTemplateDecl *Template = Record->getDescribedClassTemplate()) { |
| 198 | QualType InjectedClassName |
| 199 | = Template->getInjectedClassNameType(Context); |
| 200 | if (T == Context.getCanonicalType(InjectedClassName)) |
| 201 | return Template->getTemplatedDecl(); |
| 202 | } |
Douglas Gregor | b88e888 | 2009-07-30 17:40:51 +0000 | [diff] [blame] | 203 | // FIXME: check for class template partial specializations |
Douglas Gregor | 42af25f | 2009-05-11 19:58:34 +0000 | [diff] [blame] | 204 | } |
| 205 | |
| 206 | return 0; |
| 207 | } |
| 208 | |
Douglas Gregor | 4fdf1fa | 2009-03-11 16:48:53 +0000 | [diff] [blame] | 209 | /// \brief Require that the context specified by SS be complete. |
| 210 | /// |
| 211 | /// If SS refers to a type, this routine checks whether the type is |
| 212 | /// complete enough (or can be made complete enough) for name lookup |
| 213 | /// into the DeclContext. A type that is not yet completed can be |
| 214 | /// considered "complete enough" if it is a class/struct/union/enum |
| 215 | /// that is currently being defined. Or, if we have a type that names |
| 216 | /// a class template specialization that is not a complete type, we |
| 217 | /// will attempt to instantiate that class template. |
| 218 | bool Sema::RequireCompleteDeclContext(const CXXScopeSpec &SS) { |
| 219 | if (!SS.isSet() || SS.isInvalid()) |
| 220 | return false; |
| 221 | |
Douglas Gregor | 7cdbc58 | 2009-07-22 23:48:44 +0000 | [diff] [blame] | 222 | DeclContext *DC = computeDeclContext(SS, true); |
Douglas Gregor | 4fdf1fa | 2009-03-11 16:48:53 +0000 | [diff] [blame] | 223 | if (TagDecl *Tag = dyn_cast<TagDecl>(DC)) { |
| 224 | // If we're currently defining this type, then lookup into the |
| 225 | // type is okay: don't complain that it isn't complete yet. |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 226 | const TagType *TagT = Context.getTypeDeclType(Tag)->getAs<TagType>(); |
Douglas Gregor | 4fdf1fa | 2009-03-11 16:48:53 +0000 | [diff] [blame] | 227 | if (TagT->isBeingDefined()) |
| 228 | return false; |
| 229 | |
| 230 | // The type must be complete. |
| 231 | return RequireCompleteType(SS.getRange().getBegin(), |
| 232 | Context.getTypeDeclType(Tag), |
Anders Carlsson | b790661 | 2009-08-26 23:45:07 +0000 | [diff] [blame^] | 233 | PDiag(diag::err_incomplete_nested_name_spec) |
| 234 | << SS.getRange()); |
Douglas Gregor | 4fdf1fa | 2009-03-11 16:48:53 +0000 | [diff] [blame] | 235 | } |
| 236 | |
| 237 | return false; |
| 238 | } |
Cedric Venet | 3d65864 | 2009-02-14 20:20:19 +0000 | [diff] [blame] | 239 | |
| 240 | /// ActOnCXXGlobalScopeSpecifier - Return the object that represents the |
| 241 | /// global scope ('::'). |
| 242 | Sema::CXXScopeTy *Sema::ActOnCXXGlobalScopeSpecifier(Scope *S, |
| 243 | SourceLocation CCLoc) { |
Douglas Gregor | ab452ba | 2009-03-26 23:50:42 +0000 | [diff] [blame] | 244 | return NestedNameSpecifier::GlobalSpecifier(Context); |
Cedric Venet | 3d65864 | 2009-02-14 20:20:19 +0000 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | /// ActOnCXXNestedNameSpecifier - Called during parsing of a |
| 248 | /// nested-name-specifier. e.g. for "foo::bar::" we parsed "foo::" and now |
| 249 | /// we want to resolve "bar::". 'SS' is empty or the previously parsed |
| 250 | /// nested-name part ("foo::"), 'IdLoc' is the source location of 'bar', |
| 251 | /// 'CCLoc' is the location of '::' and 'II' is the identifier for 'bar'. |
| 252 | /// Returns a CXXScopeTy* object representing the C++ scope. |
| 253 | Sema::CXXScopeTy *Sema::ActOnCXXNestedNameSpecifier(Scope *S, |
| 254 | const CXXScopeSpec &SS, |
| 255 | SourceLocation IdLoc, |
| 256 | SourceLocation CCLoc, |
Douglas Gregor | 495c35d | 2009-08-25 22:51:20 +0000 | [diff] [blame] | 257 | IdentifierInfo &II, |
| 258 | bool EnteringContext) { |
Douglas Gregor | ab452ba | 2009-03-26 23:50:42 +0000 | [diff] [blame] | 259 | NestedNameSpecifier *Prefix |
Douglas Gregor | 3507369 | 2009-03-26 23:56:24 +0000 | [diff] [blame] | 260 | = static_cast<NestedNameSpecifier *>(SS.getScopeRep()); |
Douglas Gregor | ab452ba | 2009-03-26 23:50:42 +0000 | [diff] [blame] | 261 | |
Douglas Gregor | 495c35d | 2009-08-25 22:51:20 +0000 | [diff] [blame] | 262 | NamedDecl *SD = LookupParsedName(S, &SS, &II, LookupNestedNameSpecifierName, |
| 263 | false, false, SourceLocation(), |
| 264 | EnteringContext); |
Cedric Venet | 3d65864 | 2009-02-14 20:20:19 +0000 | [diff] [blame] | 265 | |
| 266 | if (SD) { |
Douglas Gregor | ab452ba | 2009-03-26 23:50:42 +0000 | [diff] [blame] | 267 | if (NamespaceDecl *Namespace = dyn_cast<NamespaceDecl>(SD)) |
| 268 | return NestedNameSpecifier::Create(Context, Prefix, Namespace); |
Cedric Venet | 3d65864 | 2009-02-14 20:20:19 +0000 | [diff] [blame] | 269 | |
Douglas Gregor | ab452ba | 2009-03-26 23:50:42 +0000 | [diff] [blame] | 270 | if (TypeDecl *Type = dyn_cast<TypeDecl>(SD)) { |
| 271 | // Determine whether we have a class (or, in C++0x, an enum) or |
| 272 | // a typedef thereof. If so, build the nested-name-specifier. |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 273 | QualType T = Context.getTypeDeclType(Type); |
| 274 | bool AcceptableType = false; |
| 275 | if (T->isDependentType()) |
| 276 | AcceptableType = true; |
| 277 | else if (TypedefDecl *TD = dyn_cast<TypedefDecl>(SD)) { |
Douglas Gregor | ab452ba | 2009-03-26 23:50:42 +0000 | [diff] [blame] | 278 | if (TD->getUnderlyingType()->isRecordType() || |
| 279 | (getLangOptions().CPlusPlus0x && |
| 280 | TD->getUnderlyingType()->isEnumeralType())) |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 281 | AcceptableType = true; |
Douglas Gregor | ab452ba | 2009-03-26 23:50:42 +0000 | [diff] [blame] | 282 | } else if (isa<RecordDecl>(Type) || |
| 283 | (getLangOptions().CPlusPlus0x && isa<EnumDecl>(Type))) |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 284 | AcceptableType = true; |
Douglas Gregor | ab452ba | 2009-03-26 23:50:42 +0000 | [diff] [blame] | 285 | |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 286 | if (AcceptableType) |
Douglas Gregor | ab452ba | 2009-03-26 23:50:42 +0000 | [diff] [blame] | 287 | return NestedNameSpecifier::Create(Context, Prefix, false, |
| 288 | T.getTypePtr()); |
| 289 | } |
Anders Carlsson | 81c85c4 | 2009-03-28 23:53:49 +0000 | [diff] [blame] | 290 | |
Douglas Gregor | dacd434 | 2009-08-26 00:04:55 +0000 | [diff] [blame] | 291 | // FIXME: It would be nice to maintain the namespace alias name, then |
| 292 | // see through that alias when resolving the nested-name-specifier down to |
| 293 | // a declaration context. |
Anders Carlsson | 81c85c4 | 2009-03-28 23:53:49 +0000 | [diff] [blame] | 294 | if (NamespaceAliasDecl *Alias = dyn_cast<NamespaceAliasDecl>(SD)) |
| 295 | return NestedNameSpecifier::Create(Context, Prefix, |
| 296 | Alias->getNamespace()); |
Cedric Venet | 3d65864 | 2009-02-14 20:20:19 +0000 | [diff] [blame] | 297 | |
| 298 | // Fall through to produce an error: we found something that isn't |
| 299 | // a class or a namespace. |
Douglas Gregor | 495c35d | 2009-08-25 22:51:20 +0000 | [diff] [blame] | 300 | } else if (SS.isSet() && isDependentScopeSpecifier(SS)) |
| 301 | return NestedNameSpecifier::Create(Context, Prefix, &II); |
Cedric Venet | 3d65864 | 2009-02-14 20:20:19 +0000 | [diff] [blame] | 302 | |
| 303 | // If we didn't find anything during our lookup, try again with |
| 304 | // ordinary name lookup, which can help us produce better error |
| 305 | // messages. |
| 306 | if (!SD) |
Douglas Gregor | 495c35d | 2009-08-25 22:51:20 +0000 | [diff] [blame] | 307 | SD = LookupParsedName(S, &SS, &II, LookupOrdinaryName, |
| 308 | false, false, SourceLocation(), |
| 309 | EnteringContext); |
Cedric Venet | 3d65864 | 2009-02-14 20:20:19 +0000 | [diff] [blame] | 310 | unsigned DiagID; |
| 311 | if (SD) |
| 312 | DiagID = diag::err_expected_class_or_namespace; |
| 313 | else if (SS.isSet()) |
| 314 | DiagID = diag::err_typecheck_no_member; |
| 315 | else |
| 316 | DiagID = diag::err_undeclared_var_use; |
| 317 | |
| 318 | if (SS.isSet()) |
| 319 | Diag(IdLoc, DiagID) << &II << SS.getRange(); |
| 320 | else |
| 321 | Diag(IdLoc, DiagID) << &II; |
| 322 | |
| 323 | return 0; |
| 324 | } |
| 325 | |
Douglas Gregor | 39a8de1 | 2009-02-25 19:37:18 +0000 | [diff] [blame] | 326 | Sema::CXXScopeTy *Sema::ActOnCXXNestedNameSpecifier(Scope *S, |
| 327 | const CXXScopeSpec &SS, |
| 328 | TypeTy *Ty, |
| 329 | SourceRange TypeRange, |
| 330 | SourceLocation CCLoc) { |
Douglas Gregor | ab452ba | 2009-03-26 23:50:42 +0000 | [diff] [blame] | 331 | NestedNameSpecifier *Prefix |
Douglas Gregor | 3507369 | 2009-03-26 23:56:24 +0000 | [diff] [blame] | 332 | = static_cast<NestedNameSpecifier *>(SS.getScopeRep()); |
Argyrios Kyrtzidis | e866190 | 2009-08-19 01:28:28 +0000 | [diff] [blame] | 333 | QualType T = GetTypeFromParser(Ty); |
Douglas Gregor | ab452ba | 2009-03-26 23:50:42 +0000 | [diff] [blame] | 334 | return NestedNameSpecifier::Create(Context, Prefix, /*FIXME:*/false, |
Douglas Gregor | 3f5b61c | 2009-05-14 00:28:11 +0000 | [diff] [blame] | 335 | T.getTypePtr()); |
Douglas Gregor | 39a8de1 | 2009-02-25 19:37:18 +0000 | [diff] [blame] | 336 | } |
| 337 | |
Douglas Gregor | fe85ced | 2009-08-06 03:17:00 +0000 | [diff] [blame] | 338 | Action::OwningExprResult |
| 339 | Sema::ActOnCXXEnterMemberScope(Scope *S, CXXScopeSpec &SS, ExprArg Base, |
| 340 | tok::TokenKind OpKind) { |
Nate Begeman | 2ef13e5 | 2009-08-10 23:49:36 +0000 | [diff] [blame] | 341 | // Since this might be a postfix expression, get rid of ParenListExprs. |
| 342 | Base = MaybeConvertParenListExprToParenExpr(S, move(Base)); |
| 343 | |
Douglas Gregor | fe85ced | 2009-08-06 03:17:00 +0000 | [diff] [blame] | 344 | Expr *BaseExpr = (Expr*)Base.get(); |
| 345 | assert(BaseExpr && "no record expansion"); |
| 346 | |
| 347 | QualType BaseType = BaseExpr->getType(); |
| 348 | // FIXME: handle dependent types |
| 349 | if (BaseType->isDependentType()) |
| 350 | return move(Base); |
| 351 | |
| 352 | // C++ [over.match.oper]p8: |
| 353 | // [...] When operator->returns, the operator-> is applied to the value |
| 354 | // returned, with the original second operand. |
| 355 | if (OpKind == tok::arrow) { |
| 356 | while (BaseType->isRecordType()) { |
| 357 | Base = BuildOverloadedArrowExpr(S, move(Base), BaseExpr->getExprLoc()); |
| 358 | BaseExpr = (Expr*)Base.get(); |
| 359 | if (BaseExpr == NULL) |
| 360 | return ExprError(); |
| 361 | BaseType = BaseExpr->getType(); |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | if (BaseType->isPointerType()) |
| 366 | BaseType = BaseType->getPointeeType(); |
| 367 | |
| 368 | // We could end up with various non-record types here, such as extended |
| 369 | // vector types or Objective-C interfaces. Just return early and let |
| 370 | // ActOnMemberReferenceExpr do the work. |
| 371 | if (!BaseType->isRecordType()) |
| 372 | return move(Base); |
| 373 | |
| 374 | SS.setRange(BaseExpr->getSourceRange()); |
| 375 | SS.setScopeRep( |
| 376 | NestedNameSpecifier::Create(Context, 0, false, BaseType.getTypePtr()) |
| 377 | ); |
| 378 | |
| 379 | if (S) |
| 380 | ActOnCXXEnterDeclaratorScope(S,SS); |
| 381 | return move(Base); |
| 382 | } |
| 383 | |
| 384 | void Sema::ActOnCXXExitMemberScope(Scope *S, const CXXScopeSpec &SS) { |
| 385 | if (S && SS.isSet()) |
| 386 | ActOnCXXExitDeclaratorScope(S,SS); |
| 387 | } |
| 388 | |
| 389 | |
Cedric Venet | 3d65864 | 2009-02-14 20:20:19 +0000 | [diff] [blame] | 390 | /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global |
| 391 | /// scope or nested-name-specifier) is parsed, part of a declarator-id. |
| 392 | /// After this method is called, according to [C++ 3.4.3p3], names should be |
| 393 | /// looked up in the declarator-id's scope, until the declarator is parsed and |
| 394 | /// ActOnCXXExitDeclaratorScope is called. |
| 395 | /// The 'SS' should be a non-empty valid CXXScopeSpec. |
| 396 | void Sema::ActOnCXXEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS) { |
| 397 | assert(SS.isSet() && "Parser passed invalid CXXScopeSpec."); |
Douglas Gregor | f59a56e | 2009-07-21 23:53:31 +0000 | [diff] [blame] | 398 | if (DeclContext *DC = computeDeclContext(SS, true)) |
Douglas Gregor | 3fdbed5 | 2009-07-21 18:59:28 +0000 | [diff] [blame] | 399 | EnterDeclaratorContext(S, DC); |
Cedric Venet | 3d65864 | 2009-02-14 20:20:19 +0000 | [diff] [blame] | 400 | } |
| 401 | |
| 402 | /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously |
| 403 | /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same |
| 404 | /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. |
| 405 | /// Used to indicate that names should revert to being looked up in the |
| 406 | /// defining scope. |
| 407 | void Sema::ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS) { |
| 408 | assert(SS.isSet() && "Parser passed invalid CXXScopeSpec."); |
Douglas Gregor | dacd434 | 2009-08-26 00:04:55 +0000 | [diff] [blame] | 409 | if (SS.isInvalid()) |
| 410 | return; |
| 411 | if (computeDeclContext(SS, true)) |
Douglas Gregor | 3fdbed5 | 2009-07-21 18:59:28 +0000 | [diff] [blame] | 412 | ExitDeclaratorContext(S); |
Cedric Venet | 3d65864 | 2009-02-14 20:20:19 +0000 | [diff] [blame] | 413 | } |