1 //===--- Decl.cpp - Declaration AST Node Implementation -------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the Decl subclasses.
12 //===----------------------------------------------------------------------===//
14 #include "clang/AST/Decl.h"
15 #include "clang/AST/DeclCXX.h"
16 #include "clang/AST/DeclObjC.h"
17 #include "clang/AST/DeclTemplate.h"
18 #include "clang/AST/ASTContext.h"
19 #include "clang/AST/TypeLoc.h"
20 #include "clang/AST/Stmt.h"
21 #include "clang/AST/Expr.h"
22 #include "clang/AST/ExprCXX.h"
23 #include "clang/AST/PrettyPrinter.h"
24 #include "clang/AST/ASTMutationListener.h"
25 #include "clang/Basic/Builtins.h"
26 #include "clang/Basic/IdentifierTable.h"
27 #include "clang/Basic/Module.h"
28 #include "clang/Basic/Specifiers.h"
29 #include "clang/Basic/TargetInfo.h"
30 #include "llvm/Support/ErrorHandling.h"
34 using namespace clang;
36 //===----------------------------------------------------------------------===//
37 // NamedDecl Implementation
38 //===----------------------------------------------------------------------===//
40 static llvm::Optional<Visibility> getVisibilityOf(const Decl *D) {
41 // If this declaration has an explicit visibility attribute, use it.
42 if (const VisibilityAttr *A = D->getAttr<VisibilityAttr>()) {
43 switch (A->getVisibility()) {
44 case VisibilityAttr::Default:
45 return DefaultVisibility;
46 case VisibilityAttr::Hidden:
47 return HiddenVisibility;
48 case VisibilityAttr::Protected:
49 return ProtectedVisibility;
53 // If we're on Mac OS X, an 'availability' for Mac OS X attribute
54 // implies visibility(default).
55 if (D->getASTContext().getTargetInfo().getTriple().isOSDarwin()) {
56 for (specific_attr_iterator<AvailabilityAttr>
57 A = D->specific_attr_begin<AvailabilityAttr>(),
58 AEnd = D->specific_attr_end<AvailabilityAttr>();
60 if ((*A)->getPlatform()->getName().equals("macosx"))
61 return DefaultVisibility;
64 return llvm::Optional<Visibility>();
67 typedef NamedDecl::LinkageInfo LinkageInfo;
69 static LinkageInfo getLVForType(QualType T) {
70 std::pair<Linkage,Visibility> P = T->getLinkageAndVisibility();
71 return LinkageInfo(P.first, P.second, T->isVisibilityExplicit());
74 /// \brief Get the most restrictive linkage for the types in the given
75 /// template parameter list.
77 getLVForTemplateParameterList(const TemplateParameterList *Params) {
78 LinkageInfo LV(ExternalLinkage, DefaultVisibility, false);
79 for (TemplateParameterList::const_iterator P = Params->begin(),
82 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) {
83 if (NTTP->isExpandedParameterPack()) {
84 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) {
85 QualType T = NTTP->getExpansionType(I);
86 if (!T->isDependentType())
87 LV.merge(getLVForType(T));
92 if (!NTTP->getType()->isDependentType()) {
93 LV.merge(getLVForType(NTTP->getType()));
98 if (TemplateTemplateParmDecl *TTP
99 = dyn_cast<TemplateTemplateParmDecl>(*P)) {
100 LV.merge(getLVForTemplateParameterList(TTP->getTemplateParameters()));
107 /// getLVForDecl - Get the linkage and visibility for the given declaration.
108 static LinkageInfo getLVForDecl(const NamedDecl *D, bool OnlyTemplate);
110 /// \brief Get the most restrictive linkage for the types and
111 /// declarations in the given template argument list.
112 static LinkageInfo getLVForTemplateArgumentList(const TemplateArgument *Args,
115 LinkageInfo LV(ExternalLinkage, DefaultVisibility, false);
117 for (unsigned I = 0; I != NumArgs; ++I) {
118 switch (Args[I].getKind()) {
119 case TemplateArgument::Null:
120 case TemplateArgument::Integral:
121 case TemplateArgument::Expression:
124 case TemplateArgument::Type:
125 LV.mergeWithMin(getLVForType(Args[I].getAsType()));
128 case TemplateArgument::Declaration:
129 if (NamedDecl *ND = dyn_cast<NamedDecl>(Args[I].getAsDecl()))
130 LV.mergeWithMin(getLVForDecl(ND, OnlyTemplate));
133 case TemplateArgument::NullPtr:
134 LV.mergeWithMin(getLVForType(Args[I].getNullPtrType()));
137 case TemplateArgument::Template:
138 case TemplateArgument::TemplateExpansion:
139 if (TemplateDecl *Template
140 = Args[I].getAsTemplateOrTemplatePattern().getAsTemplateDecl())
141 LV.mergeWithMin(getLVForDecl(Template, OnlyTemplate));
144 case TemplateArgument::Pack:
145 LV.mergeWithMin(getLVForTemplateArgumentList(Args[I].pack_begin(),
156 getLVForTemplateArgumentList(const TemplateArgumentList &TArgs,
158 return getLVForTemplateArgumentList(TArgs.data(), TArgs.size(), OnlyTemplate);
161 static bool shouldConsiderTemplateVis(const FunctionDecl *fn,
162 const FunctionTemplateSpecializationInfo *spec) {
163 return !fn->hasAttr<VisibilityAttr>() || spec->isExplicitSpecialization();
167 shouldConsiderTemplateVis(const ClassTemplateSpecializationDecl *d) {
168 return !d->hasAttr<VisibilityAttr>() || d->isExplicitSpecialization();
171 static bool useInlineVisibilityHidden(const NamedDecl *D) {
172 // FIXME: we should warn if -fvisibility-inlines-hidden is used with c.
173 const LangOptions &Opts = D->getASTContext().getLangOpts();
174 if (!Opts.CPlusPlus || !Opts.InlineVisibilityHidden)
177 const FunctionDecl *FD = dyn_cast<FunctionDecl>(D);
181 TemplateSpecializationKind TSK = TSK_Undeclared;
182 if (FunctionTemplateSpecializationInfo *spec
183 = FD->getTemplateSpecializationInfo()) {
184 TSK = spec->getTemplateSpecializationKind();
185 } else if (MemberSpecializationInfo *MSI =
186 FD->getMemberSpecializationInfo()) {
187 TSK = MSI->getTemplateSpecializationKind();
190 const FunctionDecl *Def = 0;
191 // InlineVisibilityHidden only applies to definitions, and
192 // isInlined() only gives meaningful answers on definitions
194 return TSK != TSK_ExplicitInstantiationDeclaration &&
195 TSK != TSK_ExplicitInstantiationDefinition &&
196 FD->hasBody(Def) && Def->isInlined() && !Def->hasAttr<GNUInlineAttr>();
199 static LinkageInfo getLVForNamespaceScopeDecl(const NamedDecl *D,
201 assert(D->getDeclContext()->getRedeclContext()->isFileContext() &&
202 "Not a name having namespace scope");
203 ASTContext &Context = D->getASTContext();
205 // C++ [basic.link]p3:
206 // A name having namespace scope (3.3.6) has internal linkage if it
208 // - an object, reference, function or function template that is
209 // explicitly declared static; or,
210 // (This bullet corresponds to C99 6.2.2p3.)
211 if (const VarDecl *Var = dyn_cast<VarDecl>(D)) {
212 // Explicitly declared static.
213 if (Var->getStorageClass() == SC_Static)
214 return LinkageInfo::internal();
216 // - a non-volatile object or reference that is explicitly declared const
217 // or constexpr and neither explicitly declared extern nor previously
218 // declared to have external linkage; or (there is no equivalent in C99)
219 if (Context.getLangOpts().CPlusPlus &&
220 Var->getType().isConstQualified() &&
221 !Var->getType().isVolatileQualified() &&
222 Var->getStorageClass() != SC_Extern &&
223 Var->getStorageClass() != SC_PrivateExtern) {
224 bool FoundExtern = false;
225 for (const VarDecl *PrevVar = Var->getPreviousDecl();
226 PrevVar && !FoundExtern;
227 PrevVar = PrevVar->getPreviousDecl())
228 if (isExternalLinkage(PrevVar->getLinkage()))
232 return LinkageInfo::internal();
234 if (Var->getStorageClass() == SC_None) {
235 const VarDecl *PrevVar = Var->getPreviousDecl();
236 for (; PrevVar; PrevVar = PrevVar->getPreviousDecl())
237 if (PrevVar->getStorageClass() == SC_PrivateExtern)
240 return PrevVar->getLinkageAndVisibility();
242 } else if (isa<FunctionDecl>(D) || isa<FunctionTemplateDecl>(D)) {
244 // A non-member function template can have internal linkage; any
245 // other template name shall have external linkage.
246 const FunctionDecl *Function = 0;
247 if (const FunctionTemplateDecl *FunTmpl
248 = dyn_cast<FunctionTemplateDecl>(D))
249 Function = FunTmpl->getTemplatedDecl();
251 Function = cast<FunctionDecl>(D);
253 // Explicitly declared static.
254 if (Function->getStorageClass() == SC_Static)
255 return LinkageInfo(InternalLinkage, DefaultVisibility, false);
256 } else if (const FieldDecl *Field = dyn_cast<FieldDecl>(D)) {
257 // - a data member of an anonymous union.
258 if (cast<RecordDecl>(Field->getDeclContext())->isAnonymousStructOrUnion())
259 return LinkageInfo::internal();
262 if (D->isInAnonymousNamespace()) {
263 const VarDecl *Var = dyn_cast<VarDecl>(D);
264 const FunctionDecl *Func = dyn_cast<FunctionDecl>(D);
265 if ((!Var || !Var->getDeclContext()->isExternCContext()) &&
266 (!Func || !Func->getDeclContext()->isExternCContext()))
267 return LinkageInfo::uniqueExternal();
270 // Set up the defaults.
273 // If the declaration of an identifier for an object has file
274 // scope and no storage-class specifier, its linkage is
279 if (llvm::Optional<Visibility> Vis = D->getExplicitVisibility()) {
280 LV.mergeVisibility(*Vis, true);
282 // If we're declared in a namespace with a visibility attribute,
283 // use that namespace's visibility, but don't call it explicit.
284 for (const DeclContext *DC = D->getDeclContext();
285 !isa<TranslationUnitDecl>(DC);
286 DC = DC->getParent()) {
287 const NamespaceDecl *ND = dyn_cast<NamespaceDecl>(DC);
289 if (llvm::Optional<Visibility> Vis = ND->getExplicitVisibility()) {
290 LV.mergeVisibility(*Vis, true);
298 LV.mergeVisibility(Context.getLangOpts().getVisibilityMode());
299 // If we're paying attention to global visibility, apply
300 // -finline-visibility-hidden if this is an inline method.
301 if (!LV.visibilityExplicit() && useInlineVisibilityHidden(D))
302 LV.mergeVisibility(HiddenVisibility, true);
305 // C++ [basic.link]p4:
307 // A name having namespace scope has external linkage if it is the
310 // - an object or reference, unless it has internal linkage; or
311 if (const VarDecl *Var = dyn_cast<VarDecl>(D)) {
312 // GCC applies the following optimization to variables and static
313 // data members, but not to functions:
315 // Modify the variable's LV by the LV of its type unless this is
316 // C or extern "C". This follows from [basic.link]p9:
317 // A type without linkage shall not be used as the type of a
318 // variable or function with external linkage unless
319 // - the entity has C language linkage, or
320 // - the entity is declared within an unnamed namespace, or
321 // - the entity is not used or is defined in the same
323 // and [basic.link]p10:
324 // ...the types specified by all declarations referring to a
325 // given variable or function shall be identical...
326 // C does not have an equivalent rule.
328 // Ignore this if we've got an explicit attribute; the user
329 // probably knows what they're doing.
331 // Note that we don't want to make the variable non-external
332 // because of this, but unique-external linkage suits us.
333 if (Context.getLangOpts().CPlusPlus &&
334 !Var->getDeclContext()->isExternCContext()) {
335 LinkageInfo TypeLV = getLVForType(Var->getType());
336 if (TypeLV.linkage() != ExternalLinkage)
337 return LinkageInfo::uniqueExternal();
338 LV.mergeVisibility(TypeLV);
341 if (Var->getStorageClass() == SC_PrivateExtern)
342 LV.mergeVisibility(HiddenVisibility, true);
344 // Note that Sema::MergeVarDecl already takes care of implementing
345 // C99 6.2.2p4 and propagating the visibility attribute, so we don't have
348 // - a function, unless it has internal linkage; or
349 } else if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) {
350 // In theory, we can modify the function's LV by the LV of its
351 // type unless it has C linkage (see comment above about variables
352 // for justification). In practice, GCC doesn't do this, so it's
353 // just too painful to make work.
355 if (Function->getStorageClass() == SC_PrivateExtern)
356 LV.mergeVisibility(HiddenVisibility, true);
359 // If the declaration of an identifier for a function has no
360 // storage-class specifier, its linkage is determined exactly
361 // as if it were declared with the storage-class specifier
363 if (!Context.getLangOpts().CPlusPlus &&
364 (Function->getStorageClass() == SC_Extern ||
365 Function->getStorageClass() == SC_PrivateExtern ||
366 Function->getStorageClass() == SC_None)) {
368 // For an identifier declared with the storage-class specifier
369 // extern in a scope in which a prior declaration of that
370 // identifier is visible, if the prior declaration specifies
371 // internal or external linkage, the linkage of the identifier
372 // at the later declaration is the same as the linkage
373 // specified at the prior declaration. If no prior declaration
374 // is visible, or if the prior declaration specifies no
375 // linkage, then the identifier has external linkage.
376 if (const FunctionDecl *PrevFunc = Function->getPreviousDecl()) {
377 LinkageInfo PrevLV = getLVForDecl(PrevFunc, OnlyTemplate);
378 if (PrevLV.linkage()) LV.setLinkage(PrevLV.linkage());
379 LV.mergeVisibility(PrevLV);
383 // In C++, then if the type of the function uses a type with
384 // unique-external linkage, it's not legally usable from outside
385 // this translation unit. However, we should use the C linkage
386 // rules instead for extern "C" declarations.
387 if (Context.getLangOpts().CPlusPlus &&
388 !Function->getDeclContext()->isExternCContext() &&
389 Function->getType()->getLinkage() == UniqueExternalLinkage)
390 return LinkageInfo::uniqueExternal();
392 // Consider LV from the template and the template arguments unless
393 // this is an explicit specialization with a visibility attribute.
394 if (FunctionTemplateSpecializationInfo *specInfo
395 = Function->getTemplateSpecializationInfo()) {
396 LinkageInfo TempLV = getLVForDecl(specInfo->getTemplate(), true);
397 const TemplateArgumentList &templateArgs = *specInfo->TemplateArguments;
398 LinkageInfo ArgsLV = getLVForTemplateArgumentList(templateArgs,
400 if (shouldConsiderTemplateVis(Function, specInfo)) {
401 LV.mergeWithMin(TempLV);
402 LV.mergeWithMin(ArgsLV);
404 LV.mergeLinkage(TempLV);
405 LV.mergeLinkage(ArgsLV);
409 // - a named class (Clause 9), or an unnamed class defined in a
410 // typedef declaration in which the class has the typedef name
411 // for linkage purposes (7.1.3); or
412 // - a named enumeration (7.2), or an unnamed enumeration
413 // defined in a typedef declaration in which the enumeration
414 // has the typedef name for linkage purposes (7.1.3); or
415 } else if (const TagDecl *Tag = dyn_cast<TagDecl>(D)) {
416 // Unnamed tags have no linkage.
417 if (!Tag->getDeclName() && !Tag->getTypedefNameForAnonDecl())
418 return LinkageInfo::none();
420 // If this is a class template specialization, consider the
421 // linkage of the template and template arguments.
422 if (const ClassTemplateSpecializationDecl *spec
423 = dyn_cast<ClassTemplateSpecializationDecl>(Tag)) {
424 // From the template.
425 LinkageInfo TempLV = getLVForDecl(spec->getSpecializedTemplate(), true);
427 // The arguments at which the template was instantiated.
428 const TemplateArgumentList &TemplateArgs = spec->getTemplateArgs();
429 LinkageInfo ArgsLV = getLVForTemplateArgumentList(TemplateArgs,
431 if (shouldConsiderTemplateVis(spec)) {
432 LV.mergeWithMin(TempLV);
433 LV.mergeWithMin(ArgsLV);
435 LV.mergeLinkage(TempLV);
436 LV.mergeLinkage(ArgsLV);
440 // - an enumerator belonging to an enumeration with external linkage;
441 } else if (isa<EnumConstantDecl>(D)) {
442 LinkageInfo EnumLV = getLVForDecl(cast<NamedDecl>(D->getDeclContext()),
444 if (!isExternalLinkage(EnumLV.linkage()))
445 return LinkageInfo::none();
448 // - a template, unless it is a function template that has
449 // internal linkage (Clause 14);
450 } else if (const TemplateDecl *temp = dyn_cast<TemplateDecl>(D)) {
451 LV.merge(getLVForTemplateParameterList(temp->getTemplateParameters()));
452 // - a namespace (7.3), unless it is declared within an unnamed
454 } else if (isa<NamespaceDecl>(D) && !D->isInAnonymousNamespace()) {
457 // By extension, we assign external linkage to Objective-C
459 } else if (isa<ObjCInterfaceDecl>(D)) {
462 // Everything not covered here has no linkage.
464 return LinkageInfo::none();
467 // If we ended up with non-external linkage, visibility should
468 // always be default.
469 if (LV.linkage() != ExternalLinkage)
470 return LinkageInfo(LV.linkage(), DefaultVisibility, false);
475 static LinkageInfo getLVForClassMember(const NamedDecl *D, bool OnlyTemplate) {
476 // Only certain class members have linkage. Note that fields don't
477 // really have linkage, but it's convenient to say they do for the
478 // purposes of calculating linkage of pointer-to-data-member
479 // template arguments.
480 if (!(isa<CXXMethodDecl>(D) ||
484 (D->getDeclName() || cast<TagDecl>(D)->getTypedefNameForAnonDecl()))))
485 return LinkageInfo::none();
489 // If we have an explicit visibility attribute, merge that in.
491 if (llvm::Optional<Visibility> Vis = D->getExplicitVisibility())
492 LV.mergeVisibility(*Vis, true);
493 // If we're paying attention to global visibility, apply
494 // -finline-visibility-hidden if this is an inline method.
496 // Note that we do this before merging information about
497 // the class visibility.
498 if (!LV.visibilityExplicit() && useInlineVisibilityHidden(D))
499 LV.mergeVisibility(HiddenVisibility, true);
502 // If this class member has an explicit visibility attribute, the only
503 // thing that can change its visibility is the template arguments, so
504 // only look for them when processing the class.
505 bool ClassOnlyTemplate = LV.visibilityExplicit() ? true : OnlyTemplate;
507 // If this member has an visibility attribute, ClassF will exclude
508 // attributes on the class or command line options, keeping only information
509 // about the template instantiation. If the member has no visibility
510 // attributes, mergeWithMin behaves like merge, so in both cases mergeWithMin
511 // produces the desired result.
512 LV.mergeWithMin(getLVForDecl(cast<RecordDecl>(D->getDeclContext()),
514 if (!isExternalLinkage(LV.linkage()))
515 return LinkageInfo::none();
517 // If the class already has unique-external linkage, we can't improve.
518 if (LV.linkage() == UniqueExternalLinkage)
519 return LinkageInfo::uniqueExternal();
522 LV.mergeVisibility(D->getASTContext().getLangOpts().getVisibilityMode());
524 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) {
525 // If the type of the function uses a type with unique-external
526 // linkage, it's not legally usable from outside this translation unit.
527 if (MD->getType()->getLinkage() == UniqueExternalLinkage)
528 return LinkageInfo::uniqueExternal();
530 // If this is a method template specialization, use the linkage for
531 // the template parameters and arguments.
532 if (FunctionTemplateSpecializationInfo *spec
533 = MD->getTemplateSpecializationInfo()) {
534 const TemplateArgumentList &TemplateArgs = *spec->TemplateArguments;
535 LinkageInfo ArgsLV = getLVForTemplateArgumentList(TemplateArgs,
537 TemplateParameterList *TemplateParams =
538 spec->getTemplate()->getTemplateParameters();
539 LinkageInfo ParamsLV = getLVForTemplateParameterList(TemplateParams);
540 if (shouldConsiderTemplateVis(MD, spec)) {
541 LV.mergeWithMin(ArgsLV);
543 LV.mergeWithMin(ParamsLV);
545 LV.mergeLinkage(ArgsLV);
547 LV.mergeLinkage(ParamsLV);
551 // Note that in contrast to basically every other situation, we
552 // *do* apply -fvisibility to method declarations.
554 } else if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D)) {
555 if (const ClassTemplateSpecializationDecl *spec
556 = dyn_cast<ClassTemplateSpecializationDecl>(RD)) {
557 // Merge template argument/parameter information for member
558 // class template specializations.
559 const TemplateArgumentList &TemplateArgs = spec->getTemplateArgs();
560 LinkageInfo ArgsLV = getLVForTemplateArgumentList(TemplateArgs,
562 TemplateParameterList *TemplateParams =
563 spec->getSpecializedTemplate()->getTemplateParameters();
564 LinkageInfo ParamsLV = getLVForTemplateParameterList(TemplateParams);
565 if (shouldConsiderTemplateVis(spec)) {
566 LV.mergeWithMin(ArgsLV);
568 LV.mergeWithMin(ParamsLV);
570 LV.mergeLinkage(ArgsLV);
572 LV.mergeLinkage(ParamsLV);
576 // Static data members.
577 } else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
578 // Modify the variable's linkage by its type, but ignore the
579 // type's visibility unless it's a definition.
580 LinkageInfo TypeLV = getLVForType(VD->getType());
581 if (TypeLV.linkage() != ExternalLinkage)
582 LV.mergeLinkage(UniqueExternalLinkage);
583 LV.mergeVisibility(TypeLV);
589 static void clearLinkageForClass(const CXXRecordDecl *record) {
590 for (CXXRecordDecl::decl_iterator
591 i = record->decls_begin(), e = record->decls_end(); i != e; ++i) {
593 if (isa<NamedDecl>(child))
594 cast<NamedDecl>(child)->ClearLinkageCache();
598 void NamedDecl::anchor() { }
600 void NamedDecl::ClearLinkageCache() {
601 // Note that we can't skip clearing the linkage of children just
602 // because the parent doesn't have cached linkage: we don't cache
603 // when computing linkage for parent contexts.
605 HasCachedLinkage = 0;
607 // If we're changing the linkage of a class, we need to reset the
608 // linkage of child declarations, too.
609 if (const CXXRecordDecl *record = dyn_cast<CXXRecordDecl>(this))
610 clearLinkageForClass(record);
612 if (ClassTemplateDecl *temp =
613 dyn_cast<ClassTemplateDecl>(const_cast<NamedDecl*>(this))) {
614 // Clear linkage for the template pattern.
615 CXXRecordDecl *record = temp->getTemplatedDecl();
616 record->HasCachedLinkage = 0;
617 clearLinkageForClass(record);
619 // We need to clear linkage for specializations, too.
620 for (ClassTemplateDecl::spec_iterator
621 i = temp->spec_begin(), e = temp->spec_end(); i != e; ++i)
622 i->ClearLinkageCache();
625 // Clear cached linkage for function template decls, too.
626 if (FunctionTemplateDecl *temp =
627 dyn_cast<FunctionTemplateDecl>(const_cast<NamedDecl*>(this))) {
628 temp->getTemplatedDecl()->ClearLinkageCache();
629 for (FunctionTemplateDecl::spec_iterator
630 i = temp->spec_begin(), e = temp->spec_end(); i != e; ++i)
631 i->ClearLinkageCache();
636 Linkage NamedDecl::getLinkage() const {
637 if (HasCachedLinkage) {
638 assert(Linkage(CachedLinkage) ==
639 getLVForDecl(this, true).linkage());
640 return Linkage(CachedLinkage);
643 CachedLinkage = getLVForDecl(this, true).linkage();
644 HasCachedLinkage = 1;
645 return Linkage(CachedLinkage);
648 LinkageInfo NamedDecl::getLinkageAndVisibility() const {
649 LinkageInfo LI = getLVForDecl(this, false);
650 assert(!HasCachedLinkage || Linkage(CachedLinkage) == LI.linkage());
651 HasCachedLinkage = 1;
652 CachedLinkage = LI.linkage();
656 llvm::Optional<Visibility> NamedDecl::getExplicitVisibility() const {
657 // Use the most recent declaration of a variable.
658 if (const VarDecl *Var = dyn_cast<VarDecl>(this)) {
659 if (llvm::Optional<Visibility> V =
660 getVisibilityOf(Var->getMostRecentDecl()))
663 if (Var->isStaticDataMember()) {
664 VarDecl *InstantiatedFrom = Var->getInstantiatedFromStaticDataMember();
665 if (InstantiatedFrom)
666 return getVisibilityOf(InstantiatedFrom);
669 return llvm::Optional<Visibility>();
671 // Use the most recent declaration of a function, and also handle
672 // function template specializations.
673 if (const FunctionDecl *fn = dyn_cast<FunctionDecl>(this)) {
674 if (llvm::Optional<Visibility> V
675 = getVisibilityOf(fn->getMostRecentDecl()))
678 // If the function is a specialization of a template with an
679 // explicit visibility attribute, use that.
680 if (FunctionTemplateSpecializationInfo *templateInfo
681 = fn->getTemplateSpecializationInfo())
682 return getVisibilityOf(templateInfo->getTemplate()->getTemplatedDecl());
684 // If the function is a member of a specialization of a class template
685 // and the corresponding decl has explicit visibility, use that.
686 FunctionDecl *InstantiatedFrom = fn->getInstantiatedFromMemberFunction();
687 if (InstantiatedFrom)
688 return getVisibilityOf(InstantiatedFrom);
690 return llvm::Optional<Visibility>();
693 // Otherwise, just check the declaration itself first.
694 if (llvm::Optional<Visibility> V = getVisibilityOf(this))
697 // The visibility of a template is stored in the templated decl.
698 if (const TemplateDecl *TD = dyn_cast<TemplateDecl>(this))
699 return getVisibilityOf(TD->getTemplatedDecl());
701 // If there wasn't explicit visibility there, and this is a
702 // specialization of a class template, check for visibility
704 if (const ClassTemplateSpecializationDecl *spec
705 = dyn_cast<ClassTemplateSpecializationDecl>(this))
706 return getVisibilityOf(spec->getSpecializedTemplate()->getTemplatedDecl());
708 // If this is a member class of a specialization of a class template
709 // and the corresponding decl has explicit visibility, use that.
710 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(this)) {
711 CXXRecordDecl *InstantiatedFrom = RD->getInstantiatedFromMemberClass();
712 if (InstantiatedFrom)
713 return getVisibilityOf(InstantiatedFrom);
716 return llvm::Optional<Visibility>();
719 static LinkageInfo getLVForDecl(const NamedDecl *D, bool OnlyTemplate) {
720 // Objective-C: treat all Objective-C declarations as having external
722 switch (D->getKind()) {
726 return LinkageInfo::none();
727 case Decl::TemplateTemplateParm: // count these as external
728 case Decl::NonTypeTemplateParm:
729 case Decl::ObjCAtDefsField:
730 case Decl::ObjCCategory:
731 case Decl::ObjCCategoryImpl:
732 case Decl::ObjCCompatibleAlias:
733 case Decl::ObjCImplementation:
734 case Decl::ObjCMethod:
735 case Decl::ObjCProperty:
736 case Decl::ObjCPropertyImpl:
737 case Decl::ObjCProtocol:
738 return LinkageInfo::external();
740 case Decl::CXXRecord: {
741 const CXXRecordDecl *Record = cast<CXXRecordDecl>(D);
742 if (Record->isLambda()) {
743 if (!Record->getLambdaManglingNumber()) {
744 // This lambda has no mangling number, so it's internal.
745 return LinkageInfo::internal();
748 // This lambda has its linkage/visibility determined by its owner.
749 const DeclContext *DC = D->getDeclContext()->getRedeclContext();
750 if (Decl *ContextDecl = Record->getLambdaContextDecl()) {
751 if (isa<ParmVarDecl>(ContextDecl))
752 DC = ContextDecl->getDeclContext()->getRedeclContext();
754 return getLVForDecl(cast<NamedDecl>(ContextDecl),
758 if (const NamedDecl *ND = dyn_cast<NamedDecl>(DC))
759 return getLVForDecl(ND, OnlyTemplate);
761 return LinkageInfo::external();
768 // Handle linkage for namespace-scope names.
769 if (D->getDeclContext()->getRedeclContext()->isFileContext())
770 return getLVForNamespaceScopeDecl(D, OnlyTemplate);
772 // C++ [basic.link]p5:
773 // In addition, a member function, static data member, a named
774 // class or enumeration of class scope, or an unnamed class or
775 // enumeration defined in a class-scope typedef declaration such
776 // that the class or enumeration has the typedef name for linkage
777 // purposes (7.1.3), has external linkage if the name of the class
778 // has external linkage.
779 if (D->getDeclContext()->isRecord())
780 return getLVForClassMember(D, OnlyTemplate);
782 // C++ [basic.link]p6:
783 // The name of a function declared in block scope and the name of
784 // an object declared by a block scope extern declaration have
785 // linkage. If there is a visible declaration of an entity with
786 // linkage having the same name and type, ignoring entities
787 // declared outside the innermost enclosing namespace scope, the
788 // block scope declaration declares that same entity and receives
789 // the linkage of the previous declaration. If there is more than
790 // one such matching entity, the program is ill-formed. Otherwise,
791 // if no matching entity is found, the block scope entity receives
793 if (D->getLexicalDeclContext()->isFunctionOrMethod()) {
794 if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) {
795 if (Function->isInAnonymousNamespace() &&
796 !Function->getDeclContext()->isExternCContext())
797 return LinkageInfo::uniqueExternal();
801 if (llvm::Optional<Visibility> Vis = Function->getExplicitVisibility())
802 LV.mergeVisibility(*Vis, true);
805 if (const FunctionDecl *Prev = Function->getPreviousDecl()) {
806 LinkageInfo PrevLV = getLVForDecl(Prev, OnlyTemplate);
807 if (PrevLV.linkage()) LV.setLinkage(PrevLV.linkage());
808 LV.mergeVisibility(PrevLV);
814 if (const VarDecl *Var = dyn_cast<VarDecl>(D))
815 if (Var->getStorageClass() == SC_Extern ||
816 Var->getStorageClass() == SC_PrivateExtern) {
817 if (Var->isInAnonymousNamespace() &&
818 !Var->getDeclContext()->isExternCContext())
819 return LinkageInfo::uniqueExternal();
822 if (Var->getStorageClass() == SC_PrivateExtern)
823 LV.mergeVisibility(HiddenVisibility, true);
824 else if (!OnlyTemplate) {
825 if (llvm::Optional<Visibility> Vis = Var->getExplicitVisibility())
826 LV.mergeVisibility(*Vis, true);
829 // Note that Sema::MergeVarDecl already takes care of implementing
830 // C99 6.2.2p4 and propagating the visibility attribute, so we don't
831 // have to do it here.
836 // C++ [basic.link]p6:
837 // Names not covered by these rules have no linkage.
838 return LinkageInfo::none();
841 std::string NamedDecl::getQualifiedNameAsString() const {
842 return getQualifiedNameAsString(getASTContext().getPrintingPolicy());
845 std::string NamedDecl::getQualifiedNameAsString(const PrintingPolicy &P) const {
846 const DeclContext *Ctx = getDeclContext();
848 if (Ctx->isFunctionOrMethod())
849 return getNameAsString();
851 typedef SmallVector<const DeclContext *, 8> ContextsTy;
855 while (Ctx && isa<NamedDecl>(Ctx)) {
856 Contexts.push_back(Ctx);
857 Ctx = Ctx->getParent();
860 std::string QualName;
861 llvm::raw_string_ostream OS(QualName);
863 for (ContextsTy::reverse_iterator I = Contexts.rbegin(), E = Contexts.rend();
865 if (const ClassTemplateSpecializationDecl *Spec
866 = dyn_cast<ClassTemplateSpecializationDecl>(*I)) {
867 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs();
868 std::string TemplateArgsStr
869 = TemplateSpecializationType::PrintTemplateArgumentList(
873 OS << Spec->getName() << TemplateArgsStr;
874 } else if (const NamespaceDecl *ND = dyn_cast<NamespaceDecl>(*I)) {
875 if (ND->isAnonymousNamespace())
876 OS << "<anonymous namespace>";
879 } else if (const RecordDecl *RD = dyn_cast<RecordDecl>(*I)) {
880 if (!RD->getIdentifier())
881 OS << "<anonymous " << RD->getKindName() << '>';
884 } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(*I)) {
885 const FunctionProtoType *FT = 0;
886 if (FD->hasWrittenPrototype())
887 FT = dyn_cast<FunctionProtoType>(FD->getType()->castAs<FunctionType>());
891 unsigned NumParams = FD->getNumParams();
892 for (unsigned i = 0; i < NumParams; ++i) {
895 OS << FD->getParamDecl(i)->getType().stream(P);
898 if (FT->isVariadic()) {
906 OS << *cast<NamedDecl>(*I);
919 bool NamedDecl::declarationReplaces(NamedDecl *OldD) const {
920 assert(getDeclName() == OldD->getDeclName() && "Declaration name mismatch");
922 // UsingDirectiveDecl's are not really NamedDecl's, and all have same name.
923 // We want to keep it, unless it nominates same namespace.
924 if (getKind() == Decl::UsingDirective) {
925 return cast<UsingDirectiveDecl>(this)->getNominatedNamespace()
926 ->getOriginalNamespace() ==
927 cast<UsingDirectiveDecl>(OldD)->getNominatedNamespace()
928 ->getOriginalNamespace();
931 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(this))
932 // For function declarations, we keep track of redeclarations.
933 return FD->getPreviousDecl() == OldD;
935 // For function templates, the underlying function declarations are linked.
936 if (const FunctionTemplateDecl *FunctionTemplate
937 = dyn_cast<FunctionTemplateDecl>(this))
938 if (const FunctionTemplateDecl *OldFunctionTemplate
939 = dyn_cast<FunctionTemplateDecl>(OldD))
940 return FunctionTemplate->getTemplatedDecl()
941 ->declarationReplaces(OldFunctionTemplate->getTemplatedDecl());
943 // For method declarations, we keep track of redeclarations.
944 if (isa<ObjCMethodDecl>(this))
947 if (isa<ObjCInterfaceDecl>(this) && isa<ObjCCompatibleAliasDecl>(OldD))
950 if (isa<UsingShadowDecl>(this) && isa<UsingShadowDecl>(OldD))
951 return cast<UsingShadowDecl>(this)->getTargetDecl() ==
952 cast<UsingShadowDecl>(OldD)->getTargetDecl();
954 if (isa<UsingDecl>(this) && isa<UsingDecl>(OldD)) {
955 ASTContext &Context = getASTContext();
956 return Context.getCanonicalNestedNameSpecifier(
957 cast<UsingDecl>(this)->getQualifier()) ==
958 Context.getCanonicalNestedNameSpecifier(
959 cast<UsingDecl>(OldD)->getQualifier());
962 // A typedef of an Objective-C class type can replace an Objective-C class
963 // declaration or definition, and vice versa.
964 if ((isa<TypedefNameDecl>(this) && isa<ObjCInterfaceDecl>(OldD)) ||
965 (isa<ObjCInterfaceDecl>(this) && isa<TypedefNameDecl>(OldD)))
968 // For non-function declarations, if the declarations are of the
969 // same kind then this must be a redeclaration, or semantic analysis
970 // would not have given us the new declaration.
971 return this->getKind() == OldD->getKind();
974 bool NamedDecl::hasLinkage() const {
975 return getLinkage() != NoLinkage;
978 NamedDecl *NamedDecl::getUnderlyingDeclImpl() {
979 NamedDecl *ND = this;
980 while (UsingShadowDecl *UD = dyn_cast<UsingShadowDecl>(ND))
981 ND = UD->getTargetDecl();
983 if (ObjCCompatibleAliasDecl *AD = dyn_cast<ObjCCompatibleAliasDecl>(ND))
984 return AD->getClassInterface();
989 bool NamedDecl::isCXXInstanceMember() const {
990 if (!isCXXClassMember())
993 const NamedDecl *D = this;
994 if (isa<UsingShadowDecl>(D))
995 D = cast<UsingShadowDecl>(D)->getTargetDecl();
997 if (isa<FieldDecl>(D) || isa<IndirectFieldDecl>(D))
999 if (isa<CXXMethodDecl>(D))
1000 return cast<CXXMethodDecl>(D)->isInstance();
1001 if (isa<FunctionTemplateDecl>(D))
1002 return cast<CXXMethodDecl>(cast<FunctionTemplateDecl>(D)
1003 ->getTemplatedDecl())->isInstance();
1007 //===----------------------------------------------------------------------===//
1008 // DeclaratorDecl Implementation
1009 //===----------------------------------------------------------------------===//
1011 template <typename DeclT>
1012 static SourceLocation getTemplateOrInnerLocStart(const DeclT *decl) {
1013 if (decl->getNumTemplateParameterLists() > 0)
1014 return decl->getTemplateParameterList(0)->getTemplateLoc();
1016 return decl->getInnerLocStart();
1019 SourceLocation DeclaratorDecl::getTypeSpecStartLoc() const {
1020 TypeSourceInfo *TSI = getTypeSourceInfo();
1021 if (TSI) return TSI->getTypeLoc().getBeginLoc();
1022 return SourceLocation();
1025 void DeclaratorDecl::setQualifierInfo(NestedNameSpecifierLoc QualifierLoc) {
1027 // Make sure the extended decl info is allocated.
1028 if (!hasExtInfo()) {
1029 // Save (non-extended) type source info pointer.
1030 TypeSourceInfo *savedTInfo = DeclInfo.get<TypeSourceInfo*>();
1031 // Allocate external info struct.
1032 DeclInfo = new (getASTContext()) ExtInfo;
1033 // Restore savedTInfo into (extended) decl info.
1034 getExtInfo()->TInfo = savedTInfo;
1036 // Set qualifier info.
1037 getExtInfo()->QualifierLoc = QualifierLoc;
1039 // Here Qualifier == 0, i.e., we are removing the qualifier (if any).
1041 if (getExtInfo()->NumTemplParamLists == 0) {
1042 // Save type source info pointer.
1043 TypeSourceInfo *savedTInfo = getExtInfo()->TInfo;
1044 // Deallocate the extended decl info.
1045 getASTContext().Deallocate(getExtInfo());
1046 // Restore savedTInfo into (non-extended) decl info.
1047 DeclInfo = savedTInfo;
1050 getExtInfo()->QualifierLoc = QualifierLoc;
1056 DeclaratorDecl::setTemplateParameterListsInfo(ASTContext &Context,
1057 unsigned NumTPLists,
1058 TemplateParameterList **TPLists) {
1059 assert(NumTPLists > 0);
1060 // Make sure the extended decl info is allocated.
1061 if (!hasExtInfo()) {
1062 // Save (non-extended) type source info pointer.
1063 TypeSourceInfo *savedTInfo = DeclInfo.get<TypeSourceInfo*>();
1064 // Allocate external info struct.
1065 DeclInfo = new (getASTContext()) ExtInfo;
1066 // Restore savedTInfo into (extended) decl info.
1067 getExtInfo()->TInfo = savedTInfo;
1069 // Set the template parameter lists info.
1070 getExtInfo()->setTemplateParameterListsInfo(Context, NumTPLists, TPLists);
1073 SourceLocation DeclaratorDecl::getOuterLocStart() const {
1074 return getTemplateOrInnerLocStart(this);
1079 // Helper function: returns true if QT is or contains a type
1080 // having a postfix component.
1081 bool typeIsPostfix(clang::QualType QT) {
1083 const Type* T = QT.getTypePtr();
1084 switch (T->getTypeClass()) {
1088 QT = cast<PointerType>(T)->getPointeeType();
1090 case Type::BlockPointer:
1091 QT = cast<BlockPointerType>(T)->getPointeeType();
1093 case Type::MemberPointer:
1094 QT = cast<MemberPointerType>(T)->getPointeeType();
1096 case Type::LValueReference:
1097 case Type::RValueReference:
1098 QT = cast<ReferenceType>(T)->getPointeeType();
1100 case Type::PackExpansion:
1101 QT = cast<PackExpansionType>(T)->getPattern();
1104 case Type::ConstantArray:
1105 case Type::DependentSizedArray:
1106 case Type::IncompleteArray:
1107 case Type::VariableArray:
1108 case Type::FunctionProto:
1109 case Type::FunctionNoProto:
1117 SourceRange DeclaratorDecl::getSourceRange() const {
1118 SourceLocation RangeEnd = getLocation();
1119 if (TypeSourceInfo *TInfo = getTypeSourceInfo()) {
1120 if (typeIsPostfix(TInfo->getType()))
1121 RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd();
1123 return SourceRange(getOuterLocStart(), RangeEnd);
1127 QualifierInfo::setTemplateParameterListsInfo(ASTContext &Context,
1128 unsigned NumTPLists,
1129 TemplateParameterList **TPLists) {
1130 assert((NumTPLists == 0 || TPLists != 0) &&
1131 "Empty array of template parameters with positive size!");
1133 // Free previous template parameters (if any).
1134 if (NumTemplParamLists > 0) {
1135 Context.Deallocate(TemplParamLists);
1136 TemplParamLists = 0;
1137 NumTemplParamLists = 0;
1139 // Set info on matched template parameter lists (if any).
1140 if (NumTPLists > 0) {
1141 TemplParamLists = new (Context) TemplateParameterList*[NumTPLists];
1142 NumTemplParamLists = NumTPLists;
1143 for (unsigned i = NumTPLists; i-- > 0; )
1144 TemplParamLists[i] = TPLists[i];
1148 //===----------------------------------------------------------------------===//
1149 // VarDecl Implementation
1150 //===----------------------------------------------------------------------===//
1152 const char *VarDecl::getStorageClassSpecifierString(StorageClass SC) {
1154 case SC_None: break;
1155 case SC_Auto: return "auto";
1156 case SC_Extern: return "extern";
1157 case SC_OpenCLWorkGroupLocal: return "<<work-group-local>>";
1158 case SC_PrivateExtern: return "__private_extern__";
1159 case SC_Register: return "register";
1160 case SC_Static: return "static";
1163 llvm_unreachable("Invalid storage class");
1166 VarDecl *VarDecl::Create(ASTContext &C, DeclContext *DC,
1167 SourceLocation StartL, SourceLocation IdL,
1168 IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo,
1169 StorageClass S, StorageClass SCAsWritten) {
1170 return new (C) VarDecl(Var, DC, StartL, IdL, Id, T, TInfo, S, SCAsWritten);
1173 VarDecl *VarDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
1174 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(VarDecl));
1175 return new (Mem) VarDecl(Var, 0, SourceLocation(), SourceLocation(), 0,
1176 QualType(), 0, SC_None, SC_None);
1179 void VarDecl::setStorageClass(StorageClass SC) {
1180 assert(isLegalForVariable(SC));
1181 if (getStorageClass() != SC)
1182 ClearLinkageCache();
1184 VarDeclBits.SClass = SC;
1187 SourceRange VarDecl::getSourceRange() const {
1188 if (const Expr *Init = getInit()) {
1189 SourceLocation InitEnd = Init->getLocEnd();
1190 if (InitEnd.isValid())
1191 return SourceRange(getOuterLocStart(), InitEnd);
1193 return DeclaratorDecl::getSourceRange();
1196 bool VarDecl::isExternC() const {
1197 if (getLinkage() != ExternalLinkage)
1200 const DeclContext *DC = getDeclContext();
1204 ASTContext &Context = getASTContext();
1205 if (!Context.getLangOpts().CPlusPlus)
1207 return DC->isExternCContext();
1210 VarDecl *VarDecl::getCanonicalDecl() {
1211 return getFirstDeclaration();
1214 VarDecl::DefinitionKind VarDecl::isThisDeclarationADefinition(
1215 ASTContext &C) const
1217 // C++ [basic.def]p2:
1218 // A declaration is a definition unless [...] it contains the 'extern'
1219 // specifier or a linkage-specification and neither an initializer [...],
1220 // it declares a static data member in a class declaration [...].
1221 // C++ [temp.expl.spec]p15:
1222 // An explicit specialization of a static data member of a template is a
1223 // definition if the declaration includes an initializer; otherwise, it is
1225 if (isStaticDataMember()) {
1226 if (isOutOfLine() && (hasInit() ||
1227 getTemplateSpecializationKind() != TSK_ExplicitSpecialization))
1230 return DeclarationOnly;
1233 // A definition of an identifier is a declaration for that identifier that
1234 // [...] causes storage to be reserved for that object.
1235 // Note: that applies for all non-file-scope objects.
1237 // If the declaration of an identifier for an object has file scope and an
1238 // initializer, the declaration is an external definition for the identifier
1241 // AST for 'extern "C" int foo;' is annotated with 'extern'.
1242 if (hasExternalStorage())
1243 return DeclarationOnly;
1245 if (getStorageClassAsWritten() == SC_Extern ||
1246 getStorageClassAsWritten() == SC_PrivateExtern) {
1247 for (const VarDecl *PrevVar = getPreviousDecl();
1248 PrevVar; PrevVar = PrevVar->getPreviousDecl()) {
1249 if (PrevVar->getLinkage() == InternalLinkage && PrevVar->hasInit())
1250 return DeclarationOnly;
1254 // A declaration of an object that has file scope without an initializer,
1255 // and without a storage class specifier or the scs 'static', constitutes
1256 // a tentative definition.
1257 // No such thing in C++.
1258 if (!C.getLangOpts().CPlusPlus && isFileVarDecl())
1259 return TentativeDefinition;
1261 // What's left is (in C, block-scope) declarations without initializers or
1262 // external storage. These are definitions.
1266 VarDecl *VarDecl::getActingDefinition() {
1267 DefinitionKind Kind = isThisDeclarationADefinition();
1268 if (Kind != TentativeDefinition)
1271 VarDecl *LastTentative = 0;
1272 VarDecl *First = getFirstDeclaration();
1273 for (redecl_iterator I = First->redecls_begin(), E = First->redecls_end();
1275 Kind = (*I)->isThisDeclarationADefinition();
1276 if (Kind == Definition)
1278 else if (Kind == TentativeDefinition)
1281 return LastTentative;
1284 bool VarDecl::isTentativeDefinitionNow() const {
1285 DefinitionKind Kind = isThisDeclarationADefinition();
1286 if (Kind != TentativeDefinition)
1289 for (redecl_iterator I = redecls_begin(), E = redecls_end(); I != E; ++I) {
1290 if ((*I)->isThisDeclarationADefinition() == Definition)
1296 VarDecl *VarDecl::getDefinition(ASTContext &C) {
1297 VarDecl *First = getFirstDeclaration();
1298 for (redecl_iterator I = First->redecls_begin(), E = First->redecls_end();
1300 if ((*I)->isThisDeclarationADefinition(C) == Definition)
1306 VarDecl::DefinitionKind VarDecl::hasDefinition(ASTContext &C) const {
1307 DefinitionKind Kind = DeclarationOnly;
1309 const VarDecl *First = getFirstDeclaration();
1310 for (redecl_iterator I = First->redecls_begin(), E = First->redecls_end();
1312 Kind = std::max(Kind, (*I)->isThisDeclarationADefinition(C));
1313 if (Kind == Definition)
1320 const Expr *VarDecl::getAnyInitializer(const VarDecl *&D) const {
1321 redecl_iterator I = redecls_begin(), E = redecls_end();
1322 while (I != E && !I->getInit())
1327 return I->getInit();
1332 bool VarDecl::isOutOfLine() const {
1333 if (Decl::isOutOfLine())
1336 if (!isStaticDataMember())
1339 // If this static data member was instantiated from a static data member of
1340 // a class template, check whether that static data member was defined
1342 if (VarDecl *VD = getInstantiatedFromStaticDataMember())
1343 return VD->isOutOfLine();
1348 VarDecl *VarDecl::getOutOfLineDefinition() {
1349 if (!isStaticDataMember())
1352 for (VarDecl::redecl_iterator RD = redecls_begin(), RDEnd = redecls_end();
1353 RD != RDEnd; ++RD) {
1354 if (RD->getLexicalDeclContext()->isFileContext())
1361 void VarDecl::setInit(Expr *I) {
1362 if (EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>()) {
1363 Eval->~EvaluatedStmt();
1364 getASTContext().Deallocate(Eval);
1370 bool VarDecl::isUsableInConstantExpressions(ASTContext &C) const {
1371 const LangOptions &Lang = C.getLangOpts();
1373 if (!Lang.CPlusPlus)
1376 // In C++11, any variable of reference type can be used in a constant
1377 // expression if it is initialized by a constant expression.
1378 if (Lang.CPlusPlus0x && getType()->isReferenceType())
1381 // Only const objects can be used in constant expressions in C++. C++98 does
1382 // not require the variable to be non-volatile, but we consider this to be a
1384 if (!getType().isConstQualified() || getType().isVolatileQualified())
1387 // In C++, const, non-volatile variables of integral or enumeration types
1388 // can be used in constant expressions.
1389 if (getType()->isIntegralOrEnumerationType())
1392 // Additionally, in C++11, non-volatile constexpr variables can be used in
1393 // constant expressions.
1394 return Lang.CPlusPlus0x && isConstexpr();
1397 /// Convert the initializer for this declaration to the elaborated EvaluatedStmt
1398 /// form, which contains extra information on the evaluated value of the
1400 EvaluatedStmt *VarDecl::ensureEvaluatedStmt() const {
1401 EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>();
1403 Stmt *S = Init.get<Stmt *>();
1404 Eval = new (getASTContext()) EvaluatedStmt;
1411 APValue *VarDecl::evaluateValue() const {
1412 llvm::SmallVector<PartialDiagnosticAt, 8> Notes;
1413 return evaluateValue(Notes);
1416 APValue *VarDecl::evaluateValue(
1417 llvm::SmallVectorImpl<PartialDiagnosticAt> &Notes) const {
1418 EvaluatedStmt *Eval = ensureEvaluatedStmt();
1420 // We only produce notes indicating why an initializer is non-constant the
1421 // first time it is evaluated. FIXME: The notes won't always be emitted the
1422 // first time we try evaluation, so might not be produced at all.
1423 if (Eval->WasEvaluated)
1424 return Eval->Evaluated.isUninit() ? 0 : &Eval->Evaluated;
1426 const Expr *Init = cast<Expr>(Eval->Value);
1427 assert(!Init->isValueDependent());
1429 if (Eval->IsEvaluating) {
1430 // FIXME: Produce a diagnostic for self-initialization.
1431 Eval->CheckedICE = true;
1432 Eval->IsICE = false;
1436 Eval->IsEvaluating = true;
1438 bool Result = Init->EvaluateAsInitializer(Eval->Evaluated, getASTContext(),
1441 // Ensure the result is an uninitialized APValue if evaluation fails.
1443 Eval->Evaluated = APValue();
1445 Eval->IsEvaluating = false;
1446 Eval->WasEvaluated = true;
1448 // In C++11, we have determined whether the initializer was a constant
1449 // expression as a side-effect.
1450 if (getASTContext().getLangOpts().CPlusPlus0x && !Eval->CheckedICE) {
1451 Eval->CheckedICE = true;
1452 Eval->IsICE = Result && Notes.empty();
1455 return Result ? &Eval->Evaluated : 0;
1458 bool VarDecl::checkInitIsICE() const {
1459 // Initializers of weak variables are never ICEs.
1463 EvaluatedStmt *Eval = ensureEvaluatedStmt();
1464 if (Eval->CheckedICE)
1465 // We have already checked whether this subexpression is an
1466 // integral constant expression.
1469 const Expr *Init = cast<Expr>(Eval->Value);
1470 assert(!Init->isValueDependent());
1472 // In C++11, evaluate the initializer to check whether it's a constant
1474 if (getASTContext().getLangOpts().CPlusPlus0x) {
1475 llvm::SmallVector<PartialDiagnosticAt, 8> Notes;
1476 evaluateValue(Notes);
1480 // It's an ICE whether or not the definition we found is
1481 // out-of-line. See DR 721 and the discussion in Clang PR
1482 // 6206 for details.
1484 if (Eval->CheckingICE)
1486 Eval->CheckingICE = true;
1488 Eval->IsICE = Init->isIntegerConstantExpr(getASTContext());
1489 Eval->CheckingICE = false;
1490 Eval->CheckedICE = true;
1494 bool VarDecl::extendsLifetimeOfTemporary() const {
1495 assert(getType()->isReferenceType() &&"Non-references never extend lifetime");
1497 const Expr *E = getInit();
1501 if (const ExprWithCleanups *Cleanups = dyn_cast<ExprWithCleanups>(E))
1502 E = Cleanups->getSubExpr();
1504 return isa<MaterializeTemporaryExpr>(E);
1507 VarDecl *VarDecl::getInstantiatedFromStaticDataMember() const {
1508 if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
1509 return cast<VarDecl>(MSI->getInstantiatedFrom());
1514 TemplateSpecializationKind VarDecl::getTemplateSpecializationKind() const {
1515 if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
1516 return MSI->getTemplateSpecializationKind();
1518 return TSK_Undeclared;
1521 MemberSpecializationInfo *VarDecl::getMemberSpecializationInfo() const {
1522 return getASTContext().getInstantiatedFromStaticDataMember(this);
1525 void VarDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK,
1526 SourceLocation PointOfInstantiation) {
1527 MemberSpecializationInfo *MSI = getMemberSpecializationInfo();
1528 assert(MSI && "Not an instantiated static data member?");
1529 MSI->setTemplateSpecializationKind(TSK);
1530 if (TSK != TSK_ExplicitSpecialization &&
1531 PointOfInstantiation.isValid() &&
1532 MSI->getPointOfInstantiation().isInvalid())
1533 MSI->setPointOfInstantiation(PointOfInstantiation);
1536 //===----------------------------------------------------------------------===//
1537 // ParmVarDecl Implementation
1538 //===----------------------------------------------------------------------===//
1540 ParmVarDecl *ParmVarDecl::Create(ASTContext &C, DeclContext *DC,
1541 SourceLocation StartLoc,
1542 SourceLocation IdLoc, IdentifierInfo *Id,
1543 QualType T, TypeSourceInfo *TInfo,
1544 StorageClass S, StorageClass SCAsWritten,
1546 return new (C) ParmVarDecl(ParmVar, DC, StartLoc, IdLoc, Id, T, TInfo,
1547 S, SCAsWritten, DefArg);
1550 ParmVarDecl *ParmVarDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
1551 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(ParmVarDecl));
1552 return new (Mem) ParmVarDecl(ParmVar, 0, SourceLocation(), SourceLocation(),
1553 0, QualType(), 0, SC_None, SC_None, 0);
1556 SourceRange ParmVarDecl::getSourceRange() const {
1557 if (!hasInheritedDefaultArg()) {
1558 SourceRange ArgRange = getDefaultArgRange();
1559 if (ArgRange.isValid())
1560 return SourceRange(getOuterLocStart(), ArgRange.getEnd());
1563 return DeclaratorDecl::getSourceRange();
1566 Expr *ParmVarDecl::getDefaultArg() {
1567 assert(!hasUnparsedDefaultArg() && "Default argument is not yet parsed!");
1568 assert(!hasUninstantiatedDefaultArg() &&
1569 "Default argument is not yet instantiated!");
1571 Expr *Arg = getInit();
1572 if (ExprWithCleanups *E = dyn_cast_or_null<ExprWithCleanups>(Arg))
1573 return E->getSubExpr();
1578 SourceRange ParmVarDecl::getDefaultArgRange() const {
1579 if (const Expr *E = getInit())
1580 return E->getSourceRange();
1582 if (hasUninstantiatedDefaultArg())
1583 return getUninstantiatedDefaultArg()->getSourceRange();
1585 return SourceRange();
1588 bool ParmVarDecl::isParameterPack() const {
1589 return isa<PackExpansionType>(getType());
1592 void ParmVarDecl::setParameterIndexLarge(unsigned parameterIndex) {
1593 getASTContext().setParameterIndex(this, parameterIndex);
1594 ParmVarDeclBits.ParameterIndex = ParameterIndexSentinel;
1597 unsigned ParmVarDecl::getParameterIndexLarge() const {
1598 return getASTContext().getParameterIndex(this);
1601 //===----------------------------------------------------------------------===//
1602 // FunctionDecl Implementation
1603 //===----------------------------------------------------------------------===//
1605 void FunctionDecl::getNameForDiagnostic(std::string &S,
1606 const PrintingPolicy &Policy,
1607 bool Qualified) const {
1608 NamedDecl::getNameForDiagnostic(S, Policy, Qualified);
1609 const TemplateArgumentList *TemplateArgs = getTemplateSpecializationArgs();
1611 S += TemplateSpecializationType::PrintTemplateArgumentList(
1612 TemplateArgs->data(),
1613 TemplateArgs->size(),
1618 bool FunctionDecl::isVariadic() const {
1619 if (const FunctionProtoType *FT = getType()->getAs<FunctionProtoType>())
1620 return FT->isVariadic();
1624 bool FunctionDecl::hasBody(const FunctionDecl *&Definition) const {
1625 for (redecl_iterator I = redecls_begin(), E = redecls_end(); I != E; ++I) {
1626 if (I->Body || I->IsLateTemplateParsed) {
1635 bool FunctionDecl::hasTrivialBody() const
1637 Stmt *S = getBody();
1639 // Since we don't have a body for this function, we don't know if it's
1644 if (isa<CompoundStmt>(S) && cast<CompoundStmt>(S)->body_empty())
1649 bool FunctionDecl::isDefined(const FunctionDecl *&Definition) const {
1650 for (redecl_iterator I = redecls_begin(), E = redecls_end(); I != E; ++I) {
1651 if (I->IsDeleted || I->IsDefaulted || I->Body || I->IsLateTemplateParsed) {
1652 Definition = I->IsDeleted ? I->getCanonicalDecl() : *I;
1660 Stmt *FunctionDecl::getBody(const FunctionDecl *&Definition) const {
1661 for (redecl_iterator I = redecls_begin(), E = redecls_end(); I != E; ++I) {
1664 return I->Body.get(getASTContext().getExternalSource());
1665 } else if (I->IsLateTemplateParsed) {
1674 void FunctionDecl::setBody(Stmt *B) {
1677 EndRangeLoc = B->getLocEnd();
1680 void FunctionDecl::setPure(bool P) {
1683 if (CXXRecordDecl *Parent = dyn_cast<CXXRecordDecl>(getDeclContext()))
1684 Parent->markedVirtualFunctionPure();
1687 void FunctionDecl::setConstexpr(bool IC) {
1689 CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(this);
1691 CD->getParent()->markedConstructorConstexpr(CD);
1694 bool FunctionDecl::isMain() const {
1695 const TranslationUnitDecl *tunit =
1696 dyn_cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext());
1698 !tunit->getASTContext().getLangOpts().Freestanding &&
1700 getIdentifier()->isStr("main");
1703 bool FunctionDecl::isReservedGlobalPlacementOperator() const {
1704 assert(getDeclName().getNameKind() == DeclarationName::CXXOperatorName);
1705 assert(getDeclName().getCXXOverloadedOperator() == OO_New ||
1706 getDeclName().getCXXOverloadedOperator() == OO_Delete ||
1707 getDeclName().getCXXOverloadedOperator() == OO_Array_New ||
1708 getDeclName().getCXXOverloadedOperator() == OO_Array_Delete);
1710 if (isa<CXXRecordDecl>(getDeclContext())) return false;
1711 assert(getDeclContext()->getRedeclContext()->isTranslationUnit());
1713 const FunctionProtoType *proto = getType()->castAs<FunctionProtoType>();
1714 if (proto->getNumArgs() != 2 || proto->isVariadic()) return false;
1716 ASTContext &Context =
1717 cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext())
1720 // The result type and first argument type are constant across all
1721 // these operators. The second argument must be exactly void*.
1722 return (proto->getArgType(1).getCanonicalType() == Context.VoidPtrTy);
1725 bool FunctionDecl::isExternC() const {
1726 if (getLinkage() != ExternalLinkage)
1729 if (getAttr<OverloadableAttr>())
1732 const DeclContext *DC = getDeclContext();
1736 ASTContext &Context = getASTContext();
1737 if (!Context.getLangOpts().CPlusPlus)
1740 return isMain() || DC->isExternCContext();
1743 bool FunctionDecl::isGlobal() const {
1744 if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(this))
1745 return Method->isStatic();
1747 if (getStorageClass() == SC_Static)
1750 for (const DeclContext *DC = getDeclContext();
1752 DC = DC->getParent()) {
1753 if (const NamespaceDecl *Namespace = cast<NamespaceDecl>(DC)) {
1754 if (!Namespace->getDeclName())
1764 FunctionDecl::setPreviousDeclaration(FunctionDecl *PrevDecl) {
1765 redeclarable_base::setPreviousDeclaration(PrevDecl);
1767 if (FunctionTemplateDecl *FunTmpl = getDescribedFunctionTemplate()) {
1768 FunctionTemplateDecl *PrevFunTmpl
1769 = PrevDecl? PrevDecl->getDescribedFunctionTemplate() : 0;
1770 assert((!PrevDecl || PrevFunTmpl) && "Function/function template mismatch");
1771 FunTmpl->setPreviousDeclaration(PrevFunTmpl);
1774 if (PrevDecl && PrevDecl->IsInline)
1778 const FunctionDecl *FunctionDecl::getCanonicalDecl() const {
1779 return getFirstDeclaration();
1782 FunctionDecl *FunctionDecl::getCanonicalDecl() {
1783 return getFirstDeclaration();
1786 void FunctionDecl::setStorageClass(StorageClass SC) {
1787 assert(isLegalForFunction(SC));
1788 if (getStorageClass() != SC)
1789 ClearLinkageCache();
1794 /// \brief Returns a value indicating whether this function
1795 /// corresponds to a builtin function.
1797 /// The function corresponds to a built-in function if it is
1798 /// declared at translation scope or within an extern "C" block and
1799 /// its name matches with the name of a builtin. The returned value
1800 /// will be 0 for functions that do not correspond to a builtin, a
1801 /// value of type \c Builtin::ID if in the target-independent range
1802 /// \c [1,Builtin::First), or a target-specific builtin value.
1803 unsigned FunctionDecl::getBuiltinID() const {
1804 if (!getIdentifier())
1807 unsigned BuiltinID = getIdentifier()->getBuiltinID();
1811 ASTContext &Context = getASTContext();
1812 if (!Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID))
1815 // This function has the name of a known C library
1816 // function. Determine whether it actually refers to the C library
1817 // function or whether it just has the same name.
1819 // If this is a static function, it's not a builtin.
1820 if (getStorageClass() == SC_Static)
1823 // If this function is at translation-unit scope and we're not in
1824 // C++, it refers to the C library function.
1825 if (!Context.getLangOpts().CPlusPlus &&
1826 getDeclContext()->isTranslationUnit())
1829 // If the function is in an extern "C" linkage specification and is
1830 // not marked "overloadable", it's the real function.
1831 if (isa<LinkageSpecDecl>(getDeclContext()) &&
1832 cast<LinkageSpecDecl>(getDeclContext())->getLanguage()
1833 == LinkageSpecDecl::lang_c &&
1834 !getAttr<OverloadableAttr>())
1842 /// getNumParams - Return the number of parameters this function must have
1843 /// based on its FunctionType. This is the length of the ParamInfo array
1844 /// after it has been created.
1845 unsigned FunctionDecl::getNumParams() const {
1846 const FunctionType *FT = getType()->castAs<FunctionType>();
1847 if (isa<FunctionNoProtoType>(FT))
1849 return cast<FunctionProtoType>(FT)->getNumArgs();
1853 void FunctionDecl::setParams(ASTContext &C,
1854 llvm::ArrayRef<ParmVarDecl *> NewParamInfo) {
1855 assert(ParamInfo == 0 && "Already has param info!");
1856 assert(NewParamInfo.size() == getNumParams() && "Parameter count mismatch!");
1858 // Zero params -> null pointer.
1859 if (!NewParamInfo.empty()) {
1860 ParamInfo = new (C) ParmVarDecl*[NewParamInfo.size()];
1861 std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo);
1865 void FunctionDecl::setDeclsInPrototypeScope(llvm::ArrayRef<NamedDecl *> NewDecls) {
1866 assert(DeclsInPrototypeScope.empty() && "Already has prototype decls!");
1868 if (!NewDecls.empty()) {
1869 NamedDecl **A = new (getASTContext()) NamedDecl*[NewDecls.size()];
1870 std::copy(NewDecls.begin(), NewDecls.end(), A);
1871 DeclsInPrototypeScope = llvm::ArrayRef<NamedDecl*>(A, NewDecls.size());
1875 /// getMinRequiredArguments - Returns the minimum number of arguments
1876 /// needed to call this function. This may be fewer than the number of
1877 /// function parameters, if some of the parameters have default
1878 /// arguments (in C++) or the last parameter is a parameter pack.
1879 unsigned FunctionDecl::getMinRequiredArguments() const {
1880 if (!getASTContext().getLangOpts().CPlusPlus)
1881 return getNumParams();
1883 unsigned NumRequiredArgs = getNumParams();
1885 // If the last parameter is a parameter pack, we don't need an argument for
1887 if (NumRequiredArgs > 0 &&
1888 getParamDecl(NumRequiredArgs - 1)->isParameterPack())
1891 // If this parameter has a default argument, we don't need an argument for
1893 while (NumRequiredArgs > 0 &&
1894 getParamDecl(NumRequiredArgs-1)->hasDefaultArg())
1897 // We might have parameter packs before the end. These can't be deduced,
1898 // but they can still handle multiple arguments.
1899 unsigned ArgIdx = NumRequiredArgs;
1900 while (ArgIdx > 0) {
1901 if (getParamDecl(ArgIdx - 1)->isParameterPack())
1902 NumRequiredArgs = ArgIdx;
1907 return NumRequiredArgs;
1910 bool FunctionDecl::isInlined() const {
1914 if (isa<CXXMethodDecl>(this)) {
1915 if (!isOutOfLine() || getCanonicalDecl()->isInlineSpecified())
1919 switch (getTemplateSpecializationKind()) {
1920 case TSK_Undeclared:
1921 case TSK_ExplicitSpecialization:
1924 case TSK_ImplicitInstantiation:
1925 case TSK_ExplicitInstantiationDeclaration:
1926 case TSK_ExplicitInstantiationDefinition:
1931 const FunctionDecl *PatternDecl = getTemplateInstantiationPattern();
1932 bool HasPattern = false;
1934 HasPattern = PatternDecl->hasBody(PatternDecl);
1936 if (HasPattern && PatternDecl)
1937 return PatternDecl->isInlined();
1942 static bool RedeclForcesDefC99(const FunctionDecl *Redecl) {
1943 // Only consider file-scope declarations in this test.
1944 if (!Redecl->getLexicalDeclContext()->isTranslationUnit())
1947 // Only consider explicit declarations; the presence of a builtin for a
1948 // libcall shouldn't affect whether a definition is externally visible.
1949 if (Redecl->isImplicit())
1952 if (!Redecl->isInlineSpecified() || Redecl->getStorageClass() == SC_Extern)
1953 return true; // Not an inline definition
1958 /// \brief For a function declaration in C or C++, determine whether this
1959 /// declaration causes the definition to be externally visible.
1961 /// Specifically, this determines if adding the current declaration to the set
1962 /// of redeclarations of the given functions causes
1963 /// isInlineDefinitionExternallyVisible to change from false to true.
1964 bool FunctionDecl::doesDeclarationForceExternallyVisibleDefinition() const {
1965 assert(!doesThisDeclarationHaveABody() &&
1966 "Must have a declaration without a body.");
1968 ASTContext &Context = getASTContext();
1970 if (Context.getLangOpts().GNUInline || hasAttr<GNUInlineAttr>()) {
1971 // With GNU inlining, a declaration with 'inline' but not 'extern', forces
1972 // an externally visible definition.
1974 // FIXME: What happens if gnu_inline gets added on after the first
1976 if (!isInlineSpecified() || getStorageClassAsWritten() == SC_Extern)
1979 const FunctionDecl *Prev = this;
1980 bool FoundBody = false;
1981 while ((Prev = Prev->getPreviousDecl())) {
1982 FoundBody |= Prev->Body;
1985 // If it's not the case that both 'inline' and 'extern' are
1986 // specified on the definition, then it is always externally visible.
1987 if (!Prev->isInlineSpecified() ||
1988 Prev->getStorageClassAsWritten() != SC_Extern)
1990 } else if (Prev->isInlineSpecified() &&
1991 Prev->getStorageClassAsWritten() != SC_Extern) {
1998 if (Context.getLangOpts().CPlusPlus)
2002 // [...] If all of the file scope declarations for a function in a
2003 // translation unit include the inline function specifier without extern,
2004 // then the definition in that translation unit is an inline definition.
2005 if (isInlineSpecified() && getStorageClass() != SC_Extern)
2007 const FunctionDecl *Prev = this;
2008 bool FoundBody = false;
2009 while ((Prev = Prev->getPreviousDecl())) {
2010 FoundBody |= Prev->Body;
2011 if (RedeclForcesDefC99(Prev))
2017 /// \brief For an inline function definition in C or C++, determine whether the
2018 /// definition will be externally visible.
2020 /// Inline function definitions are always available for inlining optimizations.
2021 /// However, depending on the language dialect, declaration specifiers, and
2022 /// attributes, the definition of an inline function may or may not be
2023 /// "externally" visible to other translation units in the program.
2025 /// In C99, inline definitions are not externally visible by default. However,
2026 /// if even one of the global-scope declarations is marked "extern inline", the
2027 /// inline definition becomes externally visible (C99 6.7.4p6).
2029 /// In GNU89 mode, or if the gnu_inline attribute is attached to the function
2030 /// definition, we use the GNU semantics for inline, which are nearly the
2031 /// opposite of C99 semantics. In particular, "inline" by itself will create
2032 /// an externally visible symbol, but "extern inline" will not create an
2033 /// externally visible symbol.
2034 bool FunctionDecl::isInlineDefinitionExternallyVisible() const {
2035 assert(doesThisDeclarationHaveABody() && "Must have the function definition");
2036 assert(isInlined() && "Function must be inline");
2037 ASTContext &Context = getASTContext();
2039 if (Context.getLangOpts().GNUInline || hasAttr<GNUInlineAttr>()) {
2040 // Note: If you change the logic here, please change
2041 // doesDeclarationForceExternallyVisibleDefinition as well.
2043 // If it's not the case that both 'inline' and 'extern' are
2044 // specified on the definition, then this inline definition is
2045 // externally visible.
2046 if (!(isInlineSpecified() && getStorageClassAsWritten() == SC_Extern))
2049 // If any declaration is 'inline' but not 'extern', then this definition
2050 // is externally visible.
2051 for (redecl_iterator Redecl = redecls_begin(), RedeclEnd = redecls_end();
2052 Redecl != RedeclEnd;
2054 if (Redecl->isInlineSpecified() &&
2055 Redecl->getStorageClassAsWritten() != SC_Extern)
2063 // [...] If all of the file scope declarations for a function in a
2064 // translation unit include the inline function specifier without extern,
2065 // then the definition in that translation unit is an inline definition.
2066 for (redecl_iterator Redecl = redecls_begin(), RedeclEnd = redecls_end();
2067 Redecl != RedeclEnd;
2069 if (RedeclForcesDefC99(*Redecl))
2074 // An inline definition does not provide an external definition for the
2075 // function, and does not forbid an external definition in another
2076 // translation unit.
2080 /// getOverloadedOperator - Which C++ overloaded operator this
2081 /// function represents, if any.
2082 OverloadedOperatorKind FunctionDecl::getOverloadedOperator() const {
2083 if (getDeclName().getNameKind() == DeclarationName::CXXOperatorName)
2084 return getDeclName().getCXXOverloadedOperator();
2089 /// getLiteralIdentifier - The literal suffix identifier this function
2090 /// represents, if any.
2091 const IdentifierInfo *FunctionDecl::getLiteralIdentifier() const {
2092 if (getDeclName().getNameKind() == DeclarationName::CXXLiteralOperatorName)
2093 return getDeclName().getCXXLiteralIdentifier();
2098 FunctionDecl::TemplatedKind FunctionDecl::getTemplatedKind() const {
2099 if (TemplateOrSpecialization.isNull())
2100 return TK_NonTemplate;
2101 if (TemplateOrSpecialization.is<FunctionTemplateDecl *>())
2102 return TK_FunctionTemplate;
2103 if (TemplateOrSpecialization.is<MemberSpecializationInfo *>())
2104 return TK_MemberSpecialization;
2105 if (TemplateOrSpecialization.is<FunctionTemplateSpecializationInfo *>())
2106 return TK_FunctionTemplateSpecialization;
2107 if (TemplateOrSpecialization.is
2108 <DependentFunctionTemplateSpecializationInfo*>())
2109 return TK_DependentFunctionTemplateSpecialization;
2111 llvm_unreachable("Did we miss a TemplateOrSpecialization type?");
2114 FunctionDecl *FunctionDecl::getInstantiatedFromMemberFunction() const {
2115 if (MemberSpecializationInfo *Info = getMemberSpecializationInfo())
2116 return cast<FunctionDecl>(Info->getInstantiatedFrom());
2121 MemberSpecializationInfo *FunctionDecl::getMemberSpecializationInfo() const {
2122 return TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>();
2126 FunctionDecl::setInstantiationOfMemberFunction(ASTContext &C,
2128 TemplateSpecializationKind TSK) {
2129 assert(TemplateOrSpecialization.isNull() &&
2130 "Member function is already a specialization");
2131 MemberSpecializationInfo *Info
2132 = new (C) MemberSpecializationInfo(FD, TSK);
2133 TemplateOrSpecialization = Info;
2136 bool FunctionDecl::isImplicitlyInstantiable() const {
2137 // If the function is invalid, it can't be implicitly instantiated.
2138 if (isInvalidDecl())
2141 switch (getTemplateSpecializationKind()) {
2142 case TSK_Undeclared:
2143 case TSK_ExplicitInstantiationDefinition:
2146 case TSK_ImplicitInstantiation:
2149 // It is possible to instantiate TSK_ExplicitSpecialization kind
2150 // if the FunctionDecl has a class scope specialization pattern.
2151 case TSK_ExplicitSpecialization:
2152 return getClassScopeSpecializationPattern() != 0;
2154 case TSK_ExplicitInstantiationDeclaration:
2159 // Find the actual template from which we will instantiate.
2160 const FunctionDecl *PatternDecl = getTemplateInstantiationPattern();
2161 bool HasPattern = false;
2163 HasPattern = PatternDecl->hasBody(PatternDecl);
2165 // C++0x [temp.explicit]p9:
2166 // Except for inline functions, other explicit instantiation declarations
2167 // have the effect of suppressing the implicit instantiation of the entity
2168 // to which they refer.
2169 if (!HasPattern || !PatternDecl)
2172 return PatternDecl->isInlined();
2175 bool FunctionDecl::isTemplateInstantiation() const {
2176 switch (getTemplateSpecializationKind()) {
2177 case TSK_Undeclared:
2178 case TSK_ExplicitSpecialization:
2180 case TSK_ImplicitInstantiation:
2181 case TSK_ExplicitInstantiationDeclaration:
2182 case TSK_ExplicitInstantiationDefinition:
2185 llvm_unreachable("All TSK values handled.");
2188 FunctionDecl *FunctionDecl::getTemplateInstantiationPattern() const {
2189 // Handle class scope explicit specialization special case.
2190 if (getTemplateSpecializationKind() == TSK_ExplicitSpecialization)
2191 return getClassScopeSpecializationPattern();
2193 if (FunctionTemplateDecl *Primary = getPrimaryTemplate()) {
2194 while (Primary->getInstantiatedFromMemberTemplate()) {
2195 // If we have hit a point where the user provided a specialization of
2196 // this template, we're done looking.
2197 if (Primary->isMemberSpecialization())
2200 Primary = Primary->getInstantiatedFromMemberTemplate();
2203 return Primary->getTemplatedDecl();
2206 return getInstantiatedFromMemberFunction();
2209 FunctionTemplateDecl *FunctionDecl::getPrimaryTemplate() const {
2210 if (FunctionTemplateSpecializationInfo *Info
2211 = TemplateOrSpecialization
2212 .dyn_cast<FunctionTemplateSpecializationInfo*>()) {
2213 return Info->Template.getPointer();
2218 FunctionDecl *FunctionDecl::getClassScopeSpecializationPattern() const {
2219 return getASTContext().getClassScopeSpecializationPattern(this);
2222 const TemplateArgumentList *
2223 FunctionDecl::getTemplateSpecializationArgs() const {
2224 if (FunctionTemplateSpecializationInfo *Info
2225 = TemplateOrSpecialization
2226 .dyn_cast<FunctionTemplateSpecializationInfo*>()) {
2227 return Info->TemplateArguments;
2232 const ASTTemplateArgumentListInfo *
2233 FunctionDecl::getTemplateSpecializationArgsAsWritten() const {
2234 if (FunctionTemplateSpecializationInfo *Info
2235 = TemplateOrSpecialization
2236 .dyn_cast<FunctionTemplateSpecializationInfo*>()) {
2237 return Info->TemplateArgumentsAsWritten;
2243 FunctionDecl::setFunctionTemplateSpecialization(ASTContext &C,
2244 FunctionTemplateDecl *Template,
2245 const TemplateArgumentList *TemplateArgs,
2247 TemplateSpecializationKind TSK,
2248 const TemplateArgumentListInfo *TemplateArgsAsWritten,
2249 SourceLocation PointOfInstantiation) {
2250 assert(TSK != TSK_Undeclared &&
2251 "Must specify the type of function template specialization");
2252 FunctionTemplateSpecializationInfo *Info
2253 = TemplateOrSpecialization.dyn_cast<FunctionTemplateSpecializationInfo*>();
2255 Info = FunctionTemplateSpecializationInfo::Create(C, this, Template, TSK,
2257 TemplateArgsAsWritten,
2258 PointOfInstantiation);
2259 TemplateOrSpecialization = Info;
2260 Template->addSpecialization(Info, InsertPos);
2264 FunctionDecl::setDependentTemplateSpecialization(ASTContext &Context,
2265 const UnresolvedSetImpl &Templates,
2266 const TemplateArgumentListInfo &TemplateArgs) {
2267 assert(TemplateOrSpecialization.isNull());
2268 size_t Size = sizeof(DependentFunctionTemplateSpecializationInfo);
2269 Size += Templates.size() * sizeof(FunctionTemplateDecl*);
2270 Size += TemplateArgs.size() * sizeof(TemplateArgumentLoc);
2271 void *Buffer = Context.Allocate(Size);
2272 DependentFunctionTemplateSpecializationInfo *Info =
2273 new (Buffer) DependentFunctionTemplateSpecializationInfo(Templates,
2275 TemplateOrSpecialization = Info;
2278 DependentFunctionTemplateSpecializationInfo::
2279 DependentFunctionTemplateSpecializationInfo(const UnresolvedSetImpl &Ts,
2280 const TemplateArgumentListInfo &TArgs)
2281 : AngleLocs(TArgs.getLAngleLoc(), TArgs.getRAngleLoc()) {
2283 d.NumTemplates = Ts.size();
2284 d.NumArgs = TArgs.size();
2286 FunctionTemplateDecl **TsArray =
2287 const_cast<FunctionTemplateDecl**>(getTemplates());
2288 for (unsigned I = 0, E = Ts.size(); I != E; ++I)
2289 TsArray[I] = cast<FunctionTemplateDecl>(Ts[I]->getUnderlyingDecl());
2291 TemplateArgumentLoc *ArgsArray =
2292 const_cast<TemplateArgumentLoc*>(getTemplateArgs());
2293 for (unsigned I = 0, E = TArgs.size(); I != E; ++I)
2294 new (&ArgsArray[I]) TemplateArgumentLoc(TArgs[I]);
2297 TemplateSpecializationKind FunctionDecl::getTemplateSpecializationKind() const {
2298 // For a function template specialization, query the specialization
2299 // information object.
2300 FunctionTemplateSpecializationInfo *FTSInfo
2301 = TemplateOrSpecialization.dyn_cast<FunctionTemplateSpecializationInfo*>();
2303 return FTSInfo->getTemplateSpecializationKind();
2305 MemberSpecializationInfo *MSInfo
2306 = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>();
2308 return MSInfo->getTemplateSpecializationKind();
2310 return TSK_Undeclared;
2314 FunctionDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK,
2315 SourceLocation PointOfInstantiation) {
2316 if (FunctionTemplateSpecializationInfo *FTSInfo
2317 = TemplateOrSpecialization.dyn_cast<
2318 FunctionTemplateSpecializationInfo*>()) {
2319 FTSInfo->setTemplateSpecializationKind(TSK);
2320 if (TSK != TSK_ExplicitSpecialization &&
2321 PointOfInstantiation.isValid() &&
2322 FTSInfo->getPointOfInstantiation().isInvalid())
2323 FTSInfo->setPointOfInstantiation(PointOfInstantiation);
2324 } else if (MemberSpecializationInfo *MSInfo
2325 = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>()) {
2326 MSInfo->setTemplateSpecializationKind(TSK);
2327 if (TSK != TSK_ExplicitSpecialization &&
2328 PointOfInstantiation.isValid() &&
2329 MSInfo->getPointOfInstantiation().isInvalid())
2330 MSInfo->setPointOfInstantiation(PointOfInstantiation);
2332 llvm_unreachable("Function cannot have a template specialization kind");
2335 SourceLocation FunctionDecl::getPointOfInstantiation() const {
2336 if (FunctionTemplateSpecializationInfo *FTSInfo
2337 = TemplateOrSpecialization.dyn_cast<
2338 FunctionTemplateSpecializationInfo*>())
2339 return FTSInfo->getPointOfInstantiation();
2340 else if (MemberSpecializationInfo *MSInfo
2341 = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>())
2342 return MSInfo->getPointOfInstantiation();
2344 return SourceLocation();
2347 bool FunctionDecl::isOutOfLine() const {
2348 if (Decl::isOutOfLine())
2351 // If this function was instantiated from a member function of a
2352 // class template, check whether that member function was defined out-of-line.
2353 if (FunctionDecl *FD = getInstantiatedFromMemberFunction()) {
2354 const FunctionDecl *Definition;
2355 if (FD->hasBody(Definition))
2356 return Definition->isOutOfLine();
2359 // If this function was instantiated from a function template,
2360 // check whether that function template was defined out-of-line.
2361 if (FunctionTemplateDecl *FunTmpl = getPrimaryTemplate()) {
2362 const FunctionDecl *Definition;
2363 if (FunTmpl->getTemplatedDecl()->hasBody(Definition))
2364 return Definition->isOutOfLine();
2370 SourceRange FunctionDecl::getSourceRange() const {
2371 return SourceRange(getOuterLocStart(), EndRangeLoc);
2374 unsigned FunctionDecl::getMemoryFunctionKind() const {
2375 IdentifierInfo *FnInfo = getIdentifier();
2380 // Builtin handling.
2381 switch (getBuiltinID()) {
2382 case Builtin::BI__builtin_memset:
2383 case Builtin::BI__builtin___memset_chk:
2384 case Builtin::BImemset:
2385 return Builtin::BImemset;
2387 case Builtin::BI__builtin_memcpy:
2388 case Builtin::BI__builtin___memcpy_chk:
2389 case Builtin::BImemcpy:
2390 return Builtin::BImemcpy;
2392 case Builtin::BI__builtin_memmove:
2393 case Builtin::BI__builtin___memmove_chk:
2394 case Builtin::BImemmove:
2395 return Builtin::BImemmove;
2397 case Builtin::BIstrlcpy:
2398 return Builtin::BIstrlcpy;
2399 case Builtin::BIstrlcat:
2400 return Builtin::BIstrlcat;
2402 case Builtin::BI__builtin_memcmp:
2403 case Builtin::BImemcmp:
2404 return Builtin::BImemcmp;
2406 case Builtin::BI__builtin_strncpy:
2407 case Builtin::BI__builtin___strncpy_chk:
2408 case Builtin::BIstrncpy:
2409 return Builtin::BIstrncpy;
2411 case Builtin::BI__builtin_strncmp:
2412 case Builtin::BIstrncmp:
2413 return Builtin::BIstrncmp;
2415 case Builtin::BI__builtin_strncasecmp:
2416 case Builtin::BIstrncasecmp:
2417 return Builtin::BIstrncasecmp;
2419 case Builtin::BI__builtin_strncat:
2420 case Builtin::BI__builtin___strncat_chk:
2421 case Builtin::BIstrncat:
2422 return Builtin::BIstrncat;
2424 case Builtin::BI__builtin_strndup:
2425 case Builtin::BIstrndup:
2426 return Builtin::BIstrndup;
2428 case Builtin::BI__builtin_strlen:
2429 case Builtin::BIstrlen:
2430 return Builtin::BIstrlen;
2434 if (FnInfo->isStr("memset"))
2435 return Builtin::BImemset;
2436 else if (FnInfo->isStr("memcpy"))
2437 return Builtin::BImemcpy;
2438 else if (FnInfo->isStr("memmove"))
2439 return Builtin::BImemmove;
2440 else if (FnInfo->isStr("memcmp"))
2441 return Builtin::BImemcmp;
2442 else if (FnInfo->isStr("strncpy"))
2443 return Builtin::BIstrncpy;
2444 else if (FnInfo->isStr("strncmp"))
2445 return Builtin::BIstrncmp;
2446 else if (FnInfo->isStr("strncasecmp"))
2447 return Builtin::BIstrncasecmp;
2448 else if (FnInfo->isStr("strncat"))
2449 return Builtin::BIstrncat;
2450 else if (FnInfo->isStr("strndup"))
2451 return Builtin::BIstrndup;
2452 else if (FnInfo->isStr("strlen"))
2453 return Builtin::BIstrlen;
2460 //===----------------------------------------------------------------------===//
2461 // FieldDecl Implementation
2462 //===----------------------------------------------------------------------===//
2464 FieldDecl *FieldDecl::Create(const ASTContext &C, DeclContext *DC,
2465 SourceLocation StartLoc, SourceLocation IdLoc,
2466 IdentifierInfo *Id, QualType T,
2467 TypeSourceInfo *TInfo, Expr *BW, bool Mutable,
2468 InClassInitStyle InitStyle) {
2469 return new (C) FieldDecl(Decl::Field, DC, StartLoc, IdLoc, Id, T, TInfo,
2470 BW, Mutable, InitStyle);
2473 FieldDecl *FieldDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2474 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(FieldDecl));
2475 return new (Mem) FieldDecl(Field, 0, SourceLocation(), SourceLocation(),
2476 0, QualType(), 0, 0, false, ICIS_NoInit);
2479 bool FieldDecl::isAnonymousStructOrUnion() const {
2480 if (!isImplicit() || getDeclName())
2483 if (const RecordType *Record = getType()->getAs<RecordType>())
2484 return Record->getDecl()->isAnonymousStructOrUnion();
2489 unsigned FieldDecl::getBitWidthValue(const ASTContext &Ctx) const {
2490 assert(isBitField() && "not a bitfield");
2491 Expr *BitWidth = InitializerOrBitWidth.getPointer();
2492 return BitWidth->EvaluateKnownConstInt(Ctx).getZExtValue();
2495 unsigned FieldDecl::getFieldIndex() const {
2496 if (CachedFieldIndex) return CachedFieldIndex - 1;
2499 const RecordDecl *RD = getParent();
2500 const FieldDecl *LastFD = 0;
2501 bool IsMsStruct = RD->isMsStruct(getASTContext());
2503 for (RecordDecl::field_iterator I = RD->field_begin(), E = RD->field_end();
2504 I != E; ++I, ++Index) {
2505 I->CachedFieldIndex = Index + 1;
2508 // Zero-length bitfields following non-bitfield members are ignored.
2509 if (getASTContext().ZeroBitfieldFollowsNonBitfield(*I, LastFD)) {
2517 assert(CachedFieldIndex && "failed to find field in parent");
2518 return CachedFieldIndex - 1;
2521 SourceRange FieldDecl::getSourceRange() const {
2522 if (const Expr *E = InitializerOrBitWidth.getPointer())
2523 return SourceRange(getInnerLocStart(), E->getLocEnd());
2524 return DeclaratorDecl::getSourceRange();
2527 void FieldDecl::setBitWidth(Expr *Width) {
2528 assert(!InitializerOrBitWidth.getPointer() && !hasInClassInitializer() &&
2529 "bit width or initializer already set");
2530 InitializerOrBitWidth.setPointer(Width);
2533 void FieldDecl::setInClassInitializer(Expr *Init) {
2534 assert(!InitializerOrBitWidth.getPointer() && hasInClassInitializer() &&
2535 "bit width or initializer already set");
2536 InitializerOrBitWidth.setPointer(Init);
2539 //===----------------------------------------------------------------------===//
2540 // TagDecl Implementation
2541 //===----------------------------------------------------------------------===//
2543 SourceLocation TagDecl::getOuterLocStart() const {
2544 return getTemplateOrInnerLocStart(this);
2547 SourceRange TagDecl::getSourceRange() const {
2548 SourceLocation E = RBraceLoc.isValid() ? RBraceLoc : getLocation();
2549 return SourceRange(getOuterLocStart(), E);
2552 TagDecl* TagDecl::getCanonicalDecl() {
2553 return getFirstDeclaration();
2556 void TagDecl::setTypedefNameForAnonDecl(TypedefNameDecl *TDD) {
2557 TypedefNameDeclOrQualifier = TDD;
2559 const_cast<Type*>(TypeForDecl)->ClearLinkageCache();
2560 ClearLinkageCache();
2563 void TagDecl::startDefinition() {
2564 IsBeingDefined = true;
2566 if (isa<CXXRecordDecl>(this)) {
2567 CXXRecordDecl *D = cast<CXXRecordDecl>(this);
2568 struct CXXRecordDecl::DefinitionData *Data =
2569 new (getASTContext()) struct CXXRecordDecl::DefinitionData(D);
2570 for (redecl_iterator I = redecls_begin(), E = redecls_end(); I != E; ++I)
2571 cast<CXXRecordDecl>(*I)->DefinitionData = Data;
2575 void TagDecl::completeDefinition() {
2576 assert((!isa<CXXRecordDecl>(this) ||
2577 cast<CXXRecordDecl>(this)->hasDefinition()) &&
2578 "definition completed but not started");
2580 IsCompleteDefinition = true;
2581 IsBeingDefined = false;
2583 if (ASTMutationListener *L = getASTMutationListener())
2584 L->CompletedTagDefinition(this);
2587 TagDecl *TagDecl::getDefinition() const {
2588 if (isCompleteDefinition())
2589 return const_cast<TagDecl *>(this);
2590 if (const CXXRecordDecl *CXXRD = dyn_cast<CXXRecordDecl>(this))
2591 return CXXRD->getDefinition();
2593 for (redecl_iterator R = redecls_begin(), REnd = redecls_end();
2595 if (R->isCompleteDefinition())
2601 void TagDecl::setQualifierInfo(NestedNameSpecifierLoc QualifierLoc) {
2603 // Make sure the extended qualifier info is allocated.
2605 TypedefNameDeclOrQualifier = new (getASTContext()) ExtInfo;
2606 // Set qualifier info.
2607 getExtInfo()->QualifierLoc = QualifierLoc;
2609 // Here Qualifier == 0, i.e., we are removing the qualifier (if any).
2611 if (getExtInfo()->NumTemplParamLists == 0) {
2612 getASTContext().Deallocate(getExtInfo());
2613 TypedefNameDeclOrQualifier = (TypedefNameDecl*) 0;
2616 getExtInfo()->QualifierLoc = QualifierLoc;
2621 void TagDecl::setTemplateParameterListsInfo(ASTContext &Context,
2622 unsigned NumTPLists,
2623 TemplateParameterList **TPLists) {
2624 assert(NumTPLists > 0);
2625 // Make sure the extended decl info is allocated.
2627 // Allocate external info struct.
2628 TypedefNameDeclOrQualifier = new (getASTContext()) ExtInfo;
2629 // Set the template parameter lists info.
2630 getExtInfo()->setTemplateParameterListsInfo(Context, NumTPLists, TPLists);
2633 //===----------------------------------------------------------------------===//
2634 // EnumDecl Implementation
2635 //===----------------------------------------------------------------------===//
2637 void EnumDecl::anchor() { }
2639 EnumDecl *EnumDecl::Create(ASTContext &C, DeclContext *DC,
2640 SourceLocation StartLoc, SourceLocation IdLoc,
2642 EnumDecl *PrevDecl, bool IsScoped,
2643 bool IsScopedUsingClassTag, bool IsFixed) {
2644 EnumDecl *Enum = new (C) EnumDecl(DC, StartLoc, IdLoc, Id, PrevDecl,
2645 IsScoped, IsScopedUsingClassTag, IsFixed);
2646 C.getTypeDeclType(Enum, PrevDecl);
2650 EnumDecl *EnumDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2651 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(EnumDecl));
2652 return new (Mem) EnumDecl(0, SourceLocation(), SourceLocation(), 0, 0,
2653 false, false, false);
2656 void EnumDecl::completeDefinition(QualType NewType,
2657 QualType NewPromotionType,
2658 unsigned NumPositiveBits,
2659 unsigned NumNegativeBits) {
2660 assert(!isCompleteDefinition() && "Cannot redefine enums!");
2662 IntegerType = NewType.getTypePtr();
2663 PromotionType = NewPromotionType;
2664 setNumPositiveBits(NumPositiveBits);
2665 setNumNegativeBits(NumNegativeBits);
2666 TagDecl::completeDefinition();
2669 TemplateSpecializationKind EnumDecl::getTemplateSpecializationKind() const {
2670 if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
2671 return MSI->getTemplateSpecializationKind();
2673 return TSK_Undeclared;
2676 void EnumDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK,
2677 SourceLocation PointOfInstantiation) {
2678 MemberSpecializationInfo *MSI = getMemberSpecializationInfo();
2679 assert(MSI && "Not an instantiated member enumeration?");
2680 MSI->setTemplateSpecializationKind(TSK);
2681 if (TSK != TSK_ExplicitSpecialization &&
2682 PointOfInstantiation.isValid() &&
2683 MSI->getPointOfInstantiation().isInvalid())
2684 MSI->setPointOfInstantiation(PointOfInstantiation);
2687 EnumDecl *EnumDecl::getInstantiatedFromMemberEnum() const {
2688 if (SpecializationInfo)
2689 return cast<EnumDecl>(SpecializationInfo->getInstantiatedFrom());
2694 void EnumDecl::setInstantiationOfMemberEnum(ASTContext &C, EnumDecl *ED,
2695 TemplateSpecializationKind TSK) {
2696 assert(!SpecializationInfo && "Member enum is already a specialization");
2697 SpecializationInfo = new (C) MemberSpecializationInfo(ED, TSK);
2700 //===----------------------------------------------------------------------===//
2701 // RecordDecl Implementation
2702 //===----------------------------------------------------------------------===//
2704 RecordDecl::RecordDecl(Kind DK, TagKind TK, DeclContext *DC,
2705 SourceLocation StartLoc, SourceLocation IdLoc,
2706 IdentifierInfo *Id, RecordDecl *PrevDecl)
2707 : TagDecl(DK, TK, DC, IdLoc, Id, PrevDecl, StartLoc) {
2708 HasFlexibleArrayMember = false;
2709 AnonymousStructOrUnion = false;
2710 HasObjectMember = false;
2711 LoadedFieldsFromExternalStorage = false;
2712 assert(classof(static_cast<Decl*>(this)) && "Invalid Kind!");
2715 RecordDecl *RecordDecl::Create(const ASTContext &C, TagKind TK, DeclContext *DC,
2716 SourceLocation StartLoc, SourceLocation IdLoc,
2717 IdentifierInfo *Id, RecordDecl* PrevDecl) {
2718 RecordDecl* R = new (C) RecordDecl(Record, TK, DC, StartLoc, IdLoc, Id,
2720 C.getTypeDeclType(R, PrevDecl);
2724 RecordDecl *RecordDecl::CreateDeserialized(const ASTContext &C, unsigned ID) {
2725 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(RecordDecl));
2726 return new (Mem) RecordDecl(Record, TTK_Struct, 0, SourceLocation(),
2727 SourceLocation(), 0, 0);
2730 bool RecordDecl::isInjectedClassName() const {
2731 return isImplicit() && getDeclName() && getDeclContext()->isRecord() &&
2732 cast<RecordDecl>(getDeclContext())->getDeclName() == getDeclName();
2735 RecordDecl::field_iterator RecordDecl::field_begin() const {
2736 if (hasExternalLexicalStorage() && !LoadedFieldsFromExternalStorage)
2737 LoadFieldsFromExternalStorage();
2739 return field_iterator(decl_iterator(FirstDecl));
2742 /// completeDefinition - Notes that the definition of this type is now
2744 void RecordDecl::completeDefinition() {
2745 assert(!isCompleteDefinition() && "Cannot redefine record!");
2746 TagDecl::completeDefinition();
2749 /// isMsStruct - Get whether or not this record uses ms_struct layout.
2750 /// This which can be turned on with an attribute, pragma, or the
2751 /// -mms-bitfields command-line option.
2752 bool RecordDecl::isMsStruct(const ASTContext &C) const {
2753 return hasAttr<MsStructAttr>() || C.getLangOpts().MSBitfields == 1;
2756 static bool isFieldOrIndirectField(Decl::Kind K) {
2757 return FieldDecl::classofKind(K) || IndirectFieldDecl::classofKind(K);
2760 void RecordDecl::LoadFieldsFromExternalStorage() const {
2761 ExternalASTSource *Source = getASTContext().getExternalSource();
2762 assert(hasExternalLexicalStorage() && Source && "No external storage?");
2764 // Notify that we have a RecordDecl doing some initialization.
2765 ExternalASTSource::Deserializing TheFields(Source);
2767 SmallVector<Decl*, 64> Decls;
2768 LoadedFieldsFromExternalStorage = true;
2769 switch (Source->FindExternalLexicalDecls(this, isFieldOrIndirectField,
2774 case ELR_AlreadyLoaded:
2780 // Check that all decls we got were FieldDecls.
2781 for (unsigned i=0, e=Decls.size(); i != e; ++i)
2782 assert(isa<FieldDecl>(Decls[i]) || isa<IndirectFieldDecl>(Decls[i]));
2788 llvm::tie(FirstDecl, LastDecl) = BuildDeclChain(Decls,
2789 /*FieldsAlreadyLoaded=*/false);
2792 //===----------------------------------------------------------------------===//
2793 // BlockDecl Implementation
2794 //===----------------------------------------------------------------------===//
2796 void BlockDecl::setParams(llvm::ArrayRef<ParmVarDecl *> NewParamInfo) {
2797 assert(ParamInfo == 0 && "Already has param info!");
2799 // Zero params -> null pointer.
2800 if (!NewParamInfo.empty()) {
2801 NumParams = NewParamInfo.size();
2802 ParamInfo = new (getASTContext()) ParmVarDecl*[NewParamInfo.size()];
2803 std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo);
2807 void BlockDecl::setCaptures(ASTContext &Context,
2808 const Capture *begin,
2810 bool capturesCXXThis) {
2811 CapturesCXXThis = capturesCXXThis;
2819 NumCaptures = end - begin;
2821 // Avoid new Capture[] because we don't want to provide a default
2823 size_t allocationSize = NumCaptures * sizeof(Capture);
2824 void *buffer = Context.Allocate(allocationSize, /*alignment*/sizeof(void*));
2825 memcpy(buffer, begin, allocationSize);
2826 Captures = static_cast<Capture*>(buffer);
2829 bool BlockDecl::capturesVariable(const VarDecl *variable) const {
2830 for (capture_const_iterator
2831 i = capture_begin(), e = capture_end(); i != e; ++i)
2832 // Only auto vars can be captured, so no redeclaration worries.
2833 if (i->getVariable() == variable)
2839 SourceRange BlockDecl::getSourceRange() const {
2840 return SourceRange(getLocation(), Body? Body->getLocEnd() : getLocation());
2843 //===----------------------------------------------------------------------===//
2844 // Other Decl Allocation/Deallocation Method Implementations
2845 //===----------------------------------------------------------------------===//
2847 void TranslationUnitDecl::anchor() { }
2849 TranslationUnitDecl *TranslationUnitDecl::Create(ASTContext &C) {
2850 return new (C) TranslationUnitDecl(C);
2853 void LabelDecl::anchor() { }
2855 LabelDecl *LabelDecl::Create(ASTContext &C, DeclContext *DC,
2856 SourceLocation IdentL, IdentifierInfo *II) {
2857 return new (C) LabelDecl(DC, IdentL, II, 0, IdentL);
2860 LabelDecl *LabelDecl::Create(ASTContext &C, DeclContext *DC,
2861 SourceLocation IdentL, IdentifierInfo *II,
2862 SourceLocation GnuLabelL) {
2863 assert(GnuLabelL != IdentL && "Use this only for GNU local labels");
2864 return new (C) LabelDecl(DC, IdentL, II, 0, GnuLabelL);
2867 LabelDecl *LabelDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2868 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(LabelDecl));
2869 return new (Mem) LabelDecl(0, SourceLocation(), 0, 0, SourceLocation());
2872 void ValueDecl::anchor() { }
2874 void ImplicitParamDecl::anchor() { }
2876 ImplicitParamDecl *ImplicitParamDecl::Create(ASTContext &C, DeclContext *DC,
2877 SourceLocation IdLoc,
2880 return new (C) ImplicitParamDecl(DC, IdLoc, Id, Type);
2883 ImplicitParamDecl *ImplicitParamDecl::CreateDeserialized(ASTContext &C,
2885 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(ImplicitParamDecl));
2886 return new (Mem) ImplicitParamDecl(0, SourceLocation(), 0, QualType());
2889 FunctionDecl *FunctionDecl::Create(ASTContext &C, DeclContext *DC,
2890 SourceLocation StartLoc,
2891 const DeclarationNameInfo &NameInfo,
2892 QualType T, TypeSourceInfo *TInfo,
2893 StorageClass SC, StorageClass SCAsWritten,
2894 bool isInlineSpecified,
2895 bool hasWrittenPrototype,
2896 bool isConstexprSpecified) {
2897 FunctionDecl *New = new (C) FunctionDecl(Function, DC, StartLoc, NameInfo,
2898 T, TInfo, SC, SCAsWritten,
2900 isConstexprSpecified);
2901 New->HasWrittenPrototype = hasWrittenPrototype;
2905 FunctionDecl *FunctionDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2906 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(FunctionDecl));
2907 return new (Mem) FunctionDecl(Function, 0, SourceLocation(),
2908 DeclarationNameInfo(), QualType(), 0,
2909 SC_None, SC_None, false, false);
2912 BlockDecl *BlockDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L) {
2913 return new (C) BlockDecl(DC, L);
2916 BlockDecl *BlockDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2917 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(BlockDecl));
2918 return new (Mem) BlockDecl(0, SourceLocation());
2921 EnumConstantDecl *EnumConstantDecl::Create(ASTContext &C, EnumDecl *CD,
2923 IdentifierInfo *Id, QualType T,
2924 Expr *E, const llvm::APSInt &V) {
2925 return new (C) EnumConstantDecl(CD, L, Id, T, E, V);
2929 EnumConstantDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2930 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(EnumConstantDecl));
2931 return new (Mem) EnumConstantDecl(0, SourceLocation(), 0, QualType(), 0,
2935 void IndirectFieldDecl::anchor() { }
2938 IndirectFieldDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L,
2939 IdentifierInfo *Id, QualType T, NamedDecl **CH,
2941 return new (C) IndirectFieldDecl(DC, L, Id, T, CH, CHS);
2944 IndirectFieldDecl *IndirectFieldDecl::CreateDeserialized(ASTContext &C,
2946 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(IndirectFieldDecl));
2947 return new (Mem) IndirectFieldDecl(0, SourceLocation(), DeclarationName(),
2951 SourceRange EnumConstantDecl::getSourceRange() const {
2952 SourceLocation End = getLocation();
2954 End = Init->getLocEnd();
2955 return SourceRange(getLocation(), End);
2958 void TypeDecl::anchor() { }
2960 TypedefDecl *TypedefDecl::Create(ASTContext &C, DeclContext *DC,
2961 SourceLocation StartLoc, SourceLocation IdLoc,
2962 IdentifierInfo *Id, TypeSourceInfo *TInfo) {
2963 return new (C) TypedefDecl(DC, StartLoc, IdLoc, Id, TInfo);
2966 void TypedefNameDecl::anchor() { }
2968 TypedefDecl *TypedefDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2969 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(TypedefDecl));
2970 return new (Mem) TypedefDecl(0, SourceLocation(), SourceLocation(), 0, 0);
2973 TypeAliasDecl *TypeAliasDecl::Create(ASTContext &C, DeclContext *DC,
2974 SourceLocation StartLoc,
2975 SourceLocation IdLoc, IdentifierInfo *Id,
2976 TypeSourceInfo *TInfo) {
2977 return new (C) TypeAliasDecl(DC, StartLoc, IdLoc, Id, TInfo);
2980 TypeAliasDecl *TypeAliasDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2981 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(TypeAliasDecl));
2982 return new (Mem) TypeAliasDecl(0, SourceLocation(), SourceLocation(), 0, 0);
2985 SourceRange TypedefDecl::getSourceRange() const {
2986 SourceLocation RangeEnd = getLocation();
2987 if (TypeSourceInfo *TInfo = getTypeSourceInfo()) {
2988 if (typeIsPostfix(TInfo->getType()))
2989 RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd();
2991 return SourceRange(getLocStart(), RangeEnd);
2994 SourceRange TypeAliasDecl::getSourceRange() const {
2995 SourceLocation RangeEnd = getLocStart();
2996 if (TypeSourceInfo *TInfo = getTypeSourceInfo())
2997 RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd();
2998 return SourceRange(getLocStart(), RangeEnd);
3001 void FileScopeAsmDecl::anchor() { }
3003 FileScopeAsmDecl *FileScopeAsmDecl::Create(ASTContext &C, DeclContext *DC,
3005 SourceLocation AsmLoc,
3006 SourceLocation RParenLoc) {
3007 return new (C) FileScopeAsmDecl(DC, Str, AsmLoc, RParenLoc);
3010 FileScopeAsmDecl *FileScopeAsmDecl::CreateDeserialized(ASTContext &C,
3012 void *Mem = AllocateDeserializedDecl(C, ID, sizeof(FileScopeAsmDecl));
3013 return new (Mem) FileScopeAsmDecl(0, 0, SourceLocation(), SourceLocation());
3016 //===----------------------------------------------------------------------===//
3017 // ImportDecl Implementation
3018 //===----------------------------------------------------------------------===//
3020 /// \brief Retrieve the number of module identifiers needed to name the given
3022 static unsigned getNumModuleIdentifiers(Module *Mod) {
3023 unsigned Result = 1;
3024 while (Mod->Parent) {
3031 ImportDecl::ImportDecl(DeclContext *DC, SourceLocation StartLoc,
3033 ArrayRef<SourceLocation> IdentifierLocs)
3034 : Decl(Import, DC, StartLoc), ImportedAndComplete(Imported, true),
3037 assert(getNumModuleIdentifiers(Imported) == IdentifierLocs.size());
3038 SourceLocation *StoredLocs = reinterpret_cast<SourceLocation *>(this + 1);
3039 memcpy(StoredLocs, IdentifierLocs.data(),
3040 IdentifierLocs.size() * sizeof(SourceLocation));
3043 ImportDecl::ImportDecl(DeclContext *DC, SourceLocation StartLoc,
3044 Module *Imported, SourceLocation EndLoc)
3045 : Decl(Import, DC, StartLoc), ImportedAndComplete(Imported, false),
3048 *reinterpret_cast<SourceLocation *>(this + 1) = EndLoc;
3051 ImportDecl *ImportDecl::Create(ASTContext &C, DeclContext *DC,
3052 SourceLocation StartLoc, Module *Imported,
3053 ArrayRef<SourceLocation> IdentifierLocs) {
3054 void *Mem = C.Allocate(sizeof(ImportDecl) +
3055 IdentifierLocs.size() * sizeof(SourceLocation));
3056 return new (Mem) ImportDecl(DC, StartLoc, Imported, IdentifierLocs);
3059 ImportDecl *ImportDecl::CreateImplicit(ASTContext &C, DeclContext *DC,
3060 SourceLocation StartLoc,
3062 SourceLocation EndLoc) {
3063 void *Mem = C.Allocate(sizeof(ImportDecl) + sizeof(SourceLocation));
3064 ImportDecl *Import = new (Mem) ImportDecl(DC, StartLoc, Imported, EndLoc);
3065 Import->setImplicit();
3069 ImportDecl *ImportDecl::CreateDeserialized(ASTContext &C, unsigned ID,
3070 unsigned NumLocations) {
3071 void *Mem = AllocateDeserializedDecl(C, ID,
3072 (sizeof(ImportDecl) +
3073 NumLocations * sizeof(SourceLocation)));
3074 return new (Mem) ImportDecl(EmptyShell());
3077 ArrayRef<SourceLocation> ImportDecl::getIdentifierLocs() const {
3078 if (!ImportedAndComplete.getInt())
3079 return ArrayRef<SourceLocation>();
3081 const SourceLocation *StoredLocs
3082 = reinterpret_cast<const SourceLocation *>(this + 1);
3083 return ArrayRef<SourceLocation>(StoredLocs,
3084 getNumModuleIdentifiers(getImportedModule()));
3087 SourceRange ImportDecl::getSourceRange() const {
3088 if (!ImportedAndComplete.getInt())
3089 return SourceRange(getLocation(),
3090 *reinterpret_cast<const SourceLocation *>(this + 1));
3092 return SourceRange(getLocation(), getIdentifierLocs().back());