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Diffstat (limited to 'clang/lib/AST/Decl.cpp')
| -rw-r--r-- | clang/lib/AST/Decl.cpp | 3057 |
1 files changed, 3057 insertions, 0 deletions
diff --git a/clang/lib/AST/Decl.cpp b/clang/lib/AST/Decl.cpp new file mode 100644 index 0000000..53032bc --- /dev/null +++ b/clang/lib/AST/Decl.cpp @@ -0,0 +1,3057 @@ +//===--- Decl.cpp - Declaration AST Node Implementation -------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file implements the Decl subclasses. +// +//===----------------------------------------------------------------------===// + +#include "clang/AST/Decl.h" +#include "clang/AST/DeclCXX.h" +#include "clang/AST/DeclObjC.h" +#include "clang/AST/DeclTemplate.h" +#include "clang/AST/ASTContext.h" +#include "clang/AST/TypeLoc.h" +#include "clang/AST/Stmt.h" +#include "clang/AST/Expr.h" +#include "clang/AST/ExprCXX.h" +#include "clang/AST/PrettyPrinter.h" +#include "clang/AST/ASTMutationListener.h" +#include "clang/Basic/Builtins.h" +#include "clang/Basic/IdentifierTable.h" +#include "clang/Basic/Module.h" +#include "clang/Basic/Specifiers.h" +#include "clang/Basic/TargetInfo.h" +#include "llvm/Support/ErrorHandling.h" + +#include <algorithm> + +using namespace clang; + +//===----------------------------------------------------------------------===// +// NamedDecl Implementation +//===----------------------------------------------------------------------===// + +static llvm::Optional<Visibility> getVisibilityOf(const Decl *D) { + // If this declaration has an explicit visibility attribute, use it. + if (const VisibilityAttr *A = D->getAttr<VisibilityAttr>()) { + switch (A->getVisibility()) { + case VisibilityAttr::Default: + return DefaultVisibility; + case VisibilityAttr::Hidden: + return HiddenVisibility; + case VisibilityAttr::Protected: + return ProtectedVisibility; + } + } + + // If we're on Mac OS X, an 'availability' for Mac OS X attribute + // implies visibility(default). + if (D->getASTContext().getTargetInfo().getTriple().isOSDarwin()) { + for (specific_attr_iterator<AvailabilityAttr> + A = D->specific_attr_begin<AvailabilityAttr>(), + AEnd = D->specific_attr_end<AvailabilityAttr>(); + A != AEnd; ++A) + if ((*A)->getPlatform()->getName().equals("macosx")) + return DefaultVisibility; + } + + return llvm::Optional<Visibility>(); +} + +typedef NamedDecl::LinkageInfo LinkageInfo; + +namespace { +/// Flags controlling the computation of linkage and visibility. +struct LVFlags { + const bool ConsiderGlobalVisibility; + const bool ConsiderVisibilityAttributes; + const bool ConsiderTemplateParameterTypes; + + LVFlags() : ConsiderGlobalVisibility(true), + ConsiderVisibilityAttributes(true), + ConsiderTemplateParameterTypes(true) { + } + + LVFlags(bool Global, bool Attributes, bool Parameters) : + ConsiderGlobalVisibility(Global), + ConsiderVisibilityAttributes(Attributes), + ConsiderTemplateParameterTypes(Parameters) { + } + + /// \brief Returns a set of flags that is only useful for computing the + /// linkage, not the visibility, of a declaration. + static LVFlags CreateOnlyDeclLinkage() { + return LVFlags(false, false, false); + } +}; +} // end anonymous namespace + +static LinkageInfo getLVForType(QualType T) { + std::pair<Linkage,Visibility> P = T->getLinkageAndVisibility(); + return LinkageInfo(P.first, P.second, T->isVisibilityExplicit()); +} + +/// \brief Get the most restrictive linkage for the types in the given +/// template parameter list. +static LinkageInfo +getLVForTemplateParameterList(const TemplateParameterList *Params) { + LinkageInfo LV(ExternalLinkage, DefaultVisibility, false); + for (TemplateParameterList::const_iterator P = Params->begin(), + PEnd = Params->end(); + P != PEnd; ++P) { + if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) { + if (NTTP->isExpandedParameterPack()) { + for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) { + QualType T = NTTP->getExpansionType(I); + if (!T->isDependentType()) + LV.merge(getLVForType(T)); + } + continue; + } + + if (!NTTP->getType()->isDependentType()) { + LV.merge(getLVForType(NTTP->getType())); + continue; + } + } + + if (TemplateTemplateParmDecl *TTP + = dyn_cast<TemplateTemplateParmDecl>(*P)) { + LV.merge(getLVForTemplateParameterList(TTP->getTemplateParameters())); + } + } + + return LV; +} + +/// getLVForDecl - Get the linkage and visibility for the given declaration. +static LinkageInfo getLVForDecl(const NamedDecl *D, LVFlags F); + +/// \brief Get the most restrictive linkage for the types and +/// declarations in the given template argument list. +static LinkageInfo getLVForTemplateArgumentList(const TemplateArgument *Args, + unsigned NumArgs, + LVFlags &F) { + LinkageInfo LV(ExternalLinkage, DefaultVisibility, false); + + for (unsigned I = 0; I != NumArgs; ++I) { + switch (Args[I].getKind()) { + case TemplateArgument::Null: + case TemplateArgument::Integral: + case TemplateArgument::Expression: + break; + + case TemplateArgument::Type: + LV.merge(getLVForType(Args[I].getAsType())); + break; + + case TemplateArgument::Declaration: + // The decl can validly be null as the representation of nullptr + // arguments, valid only in C++0x. + if (Decl *D = Args[I].getAsDecl()) { + if (NamedDecl *ND = dyn_cast<NamedDecl>(D)) + LV = merge(LV, getLVForDecl(ND, F)); + } + break; + + case TemplateArgument::Template: + case TemplateArgument::TemplateExpansion: + if (TemplateDecl *Template + = Args[I].getAsTemplateOrTemplatePattern().getAsTemplateDecl()) + LV.merge(getLVForDecl(Template, F)); + break; + + case TemplateArgument::Pack: + LV.mergeWithMin(getLVForTemplateArgumentList(Args[I].pack_begin(), + Args[I].pack_size(), + F)); + break; + } + } + + return LV; +} + +static LinkageInfo +getLVForTemplateArgumentList(const TemplateArgumentList &TArgs, + LVFlags &F) { + return getLVForTemplateArgumentList(TArgs.data(), TArgs.size(), F); +} + +static bool shouldConsiderTemplateLV(const FunctionDecl *fn, + const FunctionTemplateSpecializationInfo *spec) { + return !(spec->isExplicitSpecialization() && + fn->hasAttr<VisibilityAttr>()); +} + +static bool shouldConsiderTemplateLV(const ClassTemplateSpecializationDecl *d) { + return !(d->isExplicitSpecialization() && d->hasAttr<VisibilityAttr>()); +} + +static LinkageInfo getLVForNamespaceScopeDecl(const NamedDecl *D, LVFlags F) { + assert(D->getDeclContext()->getRedeclContext()->isFileContext() && + "Not a name having namespace scope"); + ASTContext &Context = D->getASTContext(); + + // C++ [basic.link]p3: + // A name having namespace scope (3.3.6) has internal linkage if it + // is the name of + // - an object, reference, function or function template that is + // explicitly declared static; or, + // (This bullet corresponds to C99 6.2.2p3.) + if (const VarDecl *Var = dyn_cast<VarDecl>(D)) { + // Explicitly declared static. + if (Var->getStorageClass() == SC_Static) + return LinkageInfo::internal(); + + // - an object or reference that is explicitly declared const + // and neither explicitly declared extern nor previously + // declared to have external linkage; or + // (there is no equivalent in C99) + if (Context.getLangOpts().CPlusPlus && + Var->getType().isConstant(Context) && + Var->getStorageClass() != SC_Extern && + Var->getStorageClass() != SC_PrivateExtern) { + bool FoundExtern = false; + for (const VarDecl *PrevVar = Var->getPreviousDecl(); + PrevVar && !FoundExtern; + PrevVar = PrevVar->getPreviousDecl()) + if (isExternalLinkage(PrevVar->getLinkage())) + FoundExtern = true; + + if (!FoundExtern) + return LinkageInfo::internal(); + } + if (Var->getStorageClass() == SC_None) { + const VarDecl *PrevVar = Var->getPreviousDecl(); + for (; PrevVar; PrevVar = PrevVar->getPreviousDecl()) + if (PrevVar->getStorageClass() == SC_PrivateExtern) + break; + if (PrevVar) + return PrevVar->getLinkageAndVisibility(); + } + } else if (isa<FunctionDecl>(D) || isa<FunctionTemplateDecl>(D)) { + // C++ [temp]p4: + // A non-member function template can have internal linkage; any + // other template name shall have external linkage. + const FunctionDecl *Function = 0; + if (const FunctionTemplateDecl *FunTmpl + = dyn_cast<FunctionTemplateDecl>(D)) + Function = FunTmpl->getTemplatedDecl(); + else + Function = cast<FunctionDecl>(D); + + // Explicitly declared static. + if (Function->getStorageClass() == SC_Static) + return LinkageInfo(InternalLinkage, DefaultVisibility, false); + } else if (const FieldDecl *Field = dyn_cast<FieldDecl>(D)) { + // - a data member of an anonymous union. + if (cast<RecordDecl>(Field->getDeclContext())->isAnonymousStructOrUnion()) + return LinkageInfo::internal(); + } + + if (D->isInAnonymousNamespace()) { + const VarDecl *Var = dyn_cast<VarDecl>(D); + const FunctionDecl *Func = dyn_cast<FunctionDecl>(D); + if ((!Var || !Var->getDeclContext()->isExternCContext()) && + (!Func || !Func->getDeclContext()->isExternCContext())) + return LinkageInfo::uniqueExternal(); + } + + // Set up the defaults. + + // C99 6.2.2p5: + // If the declaration of an identifier for an object has file + // scope and no storage-class specifier, its linkage is + // external. + LinkageInfo LV; + LV.mergeVisibility(Context.getLangOpts().getVisibilityMode()); + + if (F.ConsiderVisibilityAttributes) { + if (llvm::Optional<Visibility> Vis = D->getExplicitVisibility()) { + LV.setVisibility(*Vis, true); + } else { + // If we're declared in a namespace with a visibility attribute, + // use that namespace's visibility, but don't call it explicit. + for (const DeclContext *DC = D->getDeclContext(); + !isa<TranslationUnitDecl>(DC); + DC = DC->getParent()) { + const NamespaceDecl *ND = dyn_cast<NamespaceDecl>(DC); + if (!ND) continue; + if (llvm::Optional<Visibility> Vis = ND->getExplicitVisibility()) { + LV.setVisibility(*Vis, true); + break; + } + } + } + } + + // C++ [basic.link]p4: + + // A name having namespace scope has external linkage if it is the + // name of + // + // - an object or reference, unless it has internal linkage; or + if (const VarDecl *Var = dyn_cast<VarDecl>(D)) { + // GCC applies the following optimization to variables and static + // data members, but not to functions: + // + // Modify the variable's LV by the LV of its type unless this is + // C or extern "C". This follows from [basic.link]p9: + // A type without linkage shall not be used as the type of a + // variable or function with external linkage unless + // - the entity has C language linkage, or + // - the entity is declared within an unnamed namespace, or + // - the entity is not used or is defined in the same + // translation unit. + // and [basic.link]p10: + // ...the types specified by all declarations referring to a + // given variable or function shall be identical... + // C does not have an equivalent rule. + // + // Ignore this if we've got an explicit attribute; the user + // probably knows what they're doing. + // + // Note that we don't want to make the variable non-external + // because of this, but unique-external linkage suits us. + if (Context.getLangOpts().CPlusPlus && + !Var->getDeclContext()->isExternCContext()) { + LinkageInfo TypeLV = getLVForType(Var->getType()); + if (TypeLV.linkage() != ExternalLinkage) + return LinkageInfo::uniqueExternal(); + LV.mergeVisibilityWithMin(TypeLV); + } + + if (Var->getStorageClass() == SC_PrivateExtern) + LV.setVisibility(HiddenVisibility, true); + + if (!Context.getLangOpts().CPlusPlus && + (Var->getStorageClass() == SC_Extern || + Var->getStorageClass() == SC_PrivateExtern)) { + + // C99 6.2.2p4: + // For an identifier declared with the storage-class specifier + // extern in a scope in which a prior declaration of that + // identifier is visible, if the prior declaration specifies + // internal or external linkage, the linkage of the identifier + // at the later declaration is the same as the linkage + // specified at the prior declaration. If no prior declaration + // is visible, or if the prior declaration specifies no + // linkage, then the identifier has external linkage. + if (const VarDecl *PrevVar = Var->getPreviousDecl()) { + LinkageInfo PrevLV = getLVForDecl(PrevVar, F); + if (PrevLV.linkage()) LV.setLinkage(PrevLV.linkage()); + LV.mergeVisibility(PrevLV); + } + } + + // - a function, unless it has internal linkage; or + } else if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { + // In theory, we can modify the function's LV by the LV of its + // type unless it has C linkage (see comment above about variables + // for justification). In practice, GCC doesn't do this, so it's + // just too painful to make work. + + if (Function->getStorageClass() == SC_PrivateExtern) + LV.setVisibility(HiddenVisibility, true); + + // C99 6.2.2p5: + // If the declaration of an identifier for a function has no + // storage-class specifier, its linkage is determined exactly + // as if it were declared with the storage-class specifier + // extern. + if (!Context.getLangOpts().CPlusPlus && + (Function->getStorageClass() == SC_Extern || + Function->getStorageClass() == SC_PrivateExtern || + Function->getStorageClass() == SC_None)) { + // C99 6.2.2p4: + // For an identifier declared with the storage-class specifier + // extern in a scope in which a prior declaration of that + // identifier is visible, if the prior declaration specifies + // internal or external linkage, the linkage of the identifier + // at the later declaration is the same as the linkage + // specified at the prior declaration. If no prior declaration + // is visible, or if the prior declaration specifies no + // linkage, then the identifier has external linkage. + if (const FunctionDecl *PrevFunc = Function->getPreviousDecl()) { + LinkageInfo PrevLV = getLVForDecl(PrevFunc, F); + if (PrevLV.linkage()) LV.setLinkage(PrevLV.linkage()); + LV.mergeVisibility(PrevLV); + } + } + + // In C++, then if the type of the function uses a type with + // unique-external linkage, it's not legally usable from outside + // this translation unit. However, we should use the C linkage + // rules instead for extern "C" declarations. + if (Context.getLangOpts().CPlusPlus && + !Function->getDeclContext()->isExternCContext() && + Function->getType()->getLinkage() == UniqueExternalLinkage) + return LinkageInfo::uniqueExternal(); + + // Consider LV from the template and the template arguments unless + // this is an explicit specialization with a visibility attribute. + if (FunctionTemplateSpecializationInfo *specInfo + = Function->getTemplateSpecializationInfo()) { + if (shouldConsiderTemplateLV(Function, specInfo)) { + LV.merge(getLVForDecl(specInfo->getTemplate(), + LVFlags::CreateOnlyDeclLinkage())); + const TemplateArgumentList &templateArgs = *specInfo->TemplateArguments; + LV.mergeWithMin(getLVForTemplateArgumentList(templateArgs, F)); + } + } + + // - a named class (Clause 9), or an unnamed class defined in a + // typedef declaration in which the class has the typedef name + // for linkage purposes (7.1.3); or + // - a named enumeration (7.2), or an unnamed enumeration + // defined in a typedef declaration in which the enumeration + // has the typedef name for linkage purposes (7.1.3); or + } else if (const TagDecl *Tag = dyn_cast<TagDecl>(D)) { + // Unnamed tags have no linkage. + if (!Tag->getDeclName() && !Tag->getTypedefNameForAnonDecl()) + return LinkageInfo::none(); + + // If this is a class template specialization, consider the + // linkage of the template and template arguments. + if (const ClassTemplateSpecializationDecl *spec + = dyn_cast<ClassTemplateSpecializationDecl>(Tag)) { + if (shouldConsiderTemplateLV(spec)) { + // From the template. + LV.merge(getLVForDecl(spec->getSpecializedTemplate(), + LVFlags::CreateOnlyDeclLinkage())); + + // The arguments at which the template was instantiated. + const TemplateArgumentList &TemplateArgs = spec->getTemplateArgs(); + LV.mergeWithMin(getLVForTemplateArgumentList(TemplateArgs, F)); + } + } + + // - an enumerator belonging to an enumeration with external linkage; + } else if (isa<EnumConstantDecl>(D)) { + LinkageInfo EnumLV = getLVForDecl(cast<NamedDecl>(D->getDeclContext()), F); + if (!isExternalLinkage(EnumLV.linkage())) + return LinkageInfo::none(); + LV.merge(EnumLV); + + // - a template, unless it is a function template that has + // internal linkage (Clause 14); + } else if (const TemplateDecl *temp = dyn_cast<TemplateDecl>(D)) { + if (F.ConsiderTemplateParameterTypes) + LV.merge(getLVForTemplateParameterList(temp->getTemplateParameters())); + + // - a namespace (7.3), unless it is declared within an unnamed + // namespace. + } else if (isa<NamespaceDecl>(D) && !D->isInAnonymousNamespace()) { + return LV; + + // By extension, we assign external linkage to Objective-C + // interfaces. + } else if (isa<ObjCInterfaceDecl>(D)) { + // fallout + + // Everything not covered here has no linkage. + } else { + return LinkageInfo::none(); + } + + // If we ended up with non-external linkage, visibility should + // always be default. + if (LV.linkage() != ExternalLinkage) + return LinkageInfo(LV.linkage(), DefaultVisibility, false); + + return LV; +} + +static LinkageInfo getLVForClassMember(const NamedDecl *D, LVFlags F) { + // Only certain class members have linkage. Note that fields don't + // really have linkage, but it's convenient to say they do for the + // purposes of calculating linkage of pointer-to-data-member + // template arguments. + if (!(isa<CXXMethodDecl>(D) || + isa<VarDecl>(D) || + isa<FieldDecl>(D) || + (isa<TagDecl>(D) && + (D->getDeclName() || cast<TagDecl>(D)->getTypedefNameForAnonDecl())))) + return LinkageInfo::none(); + + LinkageInfo LV; + LV.mergeVisibility(D->getASTContext().getLangOpts().getVisibilityMode()); + + bool DHasExplicitVisibility = false; + // If we have an explicit visibility attribute, merge that in. + if (F.ConsiderVisibilityAttributes) { + if (llvm::Optional<Visibility> Vis = D->getExplicitVisibility()) { + LV.mergeVisibility(*Vis, true); + + DHasExplicitVisibility = true; + } + } + // Ignore both global visibility and attributes when computing our + // parent's visibility if we already have an explicit one. + LVFlags ClassF = DHasExplicitVisibility ? + LVFlags::CreateOnlyDeclLinkage() : F; + + // If we're paying attention to global visibility, apply + // -finline-visibility-hidden if this is an inline method. + // + // Note that we do this before merging information about + // the class visibility. + if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { + TemplateSpecializationKind TSK = TSK_Undeclared; + if (FunctionTemplateSpecializationInfo *spec + = MD->getTemplateSpecializationInfo()) { + TSK = spec->getTemplateSpecializationKind(); + } else if (MemberSpecializationInfo *MSI = + MD->getMemberSpecializationInfo()) { + TSK = MSI->getTemplateSpecializationKind(); + } + + const FunctionDecl *Def = 0; + // InlineVisibilityHidden only applies to definitions, and + // isInlined() only gives meaningful answers on definitions + // anyway. + if (TSK != TSK_ExplicitInstantiationDeclaration && + TSK != TSK_ExplicitInstantiationDefinition && + F.ConsiderGlobalVisibility && + !LV.visibilityExplicit() && + MD->getASTContext().getLangOpts().InlineVisibilityHidden && + MD->hasBody(Def) && Def->isInlined()) + LV.mergeVisibility(HiddenVisibility, true); + } + + // Class members only have linkage if their class has external + // linkage. + LV.merge(getLVForDecl(cast<RecordDecl>(D->getDeclContext()), ClassF)); + if (!isExternalLinkage(LV.linkage())) + return LinkageInfo::none(); + + // If the class already has unique-external linkage, we can't improve. + if (LV.linkage() == UniqueExternalLinkage) + return LinkageInfo::uniqueExternal(); + + if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { + // If the type of the function uses a type with unique-external + // linkage, it's not legally usable from outside this translation unit. + if (MD->getType()->getLinkage() == UniqueExternalLinkage) + return LinkageInfo::uniqueExternal(); + + // If this is a method template specialization, use the linkage for + // the template parameters and arguments. + if (FunctionTemplateSpecializationInfo *spec + = MD->getTemplateSpecializationInfo()) { + if (shouldConsiderTemplateLV(MD, spec)) { + LV.mergeWithMin(getLVForTemplateArgumentList(*spec->TemplateArguments, + F)); + if (F.ConsiderTemplateParameterTypes) + LV.merge(getLVForTemplateParameterList( + spec->getTemplate()->getTemplateParameters())); + } + } + + // Note that in contrast to basically every other situation, we + // *do* apply -fvisibility to method declarations. + + } else if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D)) { + if (const ClassTemplateSpecializationDecl *spec + = dyn_cast<ClassTemplateSpecializationDecl>(RD)) { + if (shouldConsiderTemplateLV(spec)) { + // Merge template argument/parameter information for member + // class template specializations. + LV.mergeWithMin(getLVForTemplateArgumentList(spec->getTemplateArgs(), + F)); + if (F.ConsiderTemplateParameterTypes) + LV.merge(getLVForTemplateParameterList( + spec->getSpecializedTemplate()->getTemplateParameters())); + } + } + + // Static data members. + } else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { + // Modify the variable's linkage by its type, but ignore the + // type's visibility unless it's a definition. + LinkageInfo TypeLV = getLVForType(VD->getType()); + if (TypeLV.linkage() != ExternalLinkage) + LV.mergeLinkage(UniqueExternalLinkage); + if (!LV.visibilityExplicit()) + LV.mergeVisibility(TypeLV); + } + + return LV; +} + +static void clearLinkageForClass(const CXXRecordDecl *record) { + for (CXXRecordDecl::decl_iterator + i = record->decls_begin(), e = record->decls_end(); i != e; ++i) { + Decl *child = *i; + if (isa<NamedDecl>(child)) + cast<NamedDecl>(child)->ClearLinkageCache(); + } +} + +void NamedDecl::anchor() { } + +void NamedDecl::ClearLinkageCache() { + // Note that we can't skip clearing the linkage of children just + // because the parent doesn't have cached linkage: we don't cache + // when computing linkage for parent contexts. + + HasCachedLinkage = 0; + + // If we're changing the linkage of a class, we need to reset the + // linkage of child declarations, too. + if (const CXXRecordDecl *record = dyn_cast<CXXRecordDecl>(this)) + clearLinkageForClass(record); + + if (ClassTemplateDecl *temp = + dyn_cast<ClassTemplateDecl>(const_cast<NamedDecl*>(this))) { + // Clear linkage for the template pattern. + CXXRecordDecl *record = temp->getTemplatedDecl(); + record->HasCachedLinkage = 0; + clearLinkageForClass(record); + + // We need to clear linkage for specializations, too. + for (ClassTemplateDecl::spec_iterator + i = temp->spec_begin(), e = temp->spec_end(); i != e; ++i) + i->ClearLinkageCache(); + } + + // Clear cached linkage for function template decls, too. + if (FunctionTemplateDecl *temp = + dyn_cast<FunctionTemplateDecl>(const_cast<NamedDecl*>(this))) { + temp->getTemplatedDecl()->ClearLinkageCache(); + for (FunctionTemplateDecl::spec_iterator + i = temp->spec_begin(), e = temp->spec_end(); i != e; ++i) + i->ClearLinkageCache(); + } + +} + +Linkage NamedDecl::getLinkage() const { + if (HasCachedLinkage) { + assert(Linkage(CachedLinkage) == + getLVForDecl(this, LVFlags::CreateOnlyDeclLinkage()).linkage()); + return Linkage(CachedLinkage); + } + + CachedLinkage = getLVForDecl(this, + LVFlags::CreateOnlyDeclLinkage()).linkage(); + HasCachedLinkage = 1; + return Linkage(CachedLinkage); +} + +LinkageInfo NamedDecl::getLinkageAndVisibility() const { + LinkageInfo LI = getLVForDecl(this, LVFlags()); + assert(!HasCachedLinkage || Linkage(CachedLinkage) == LI.linkage()); + HasCachedLinkage = 1; + CachedLinkage = LI.linkage(); + return LI; +} + +llvm::Optional<Visibility> NamedDecl::getExplicitVisibility() const { + // Use the most recent declaration of a variable. + if (const VarDecl *var = dyn_cast<VarDecl>(this)) + return getVisibilityOf(var->getMostRecentDecl()); + + // Use the most recent declaration of a function, and also handle + // function template specializations. + if (const FunctionDecl *fn = dyn_cast<FunctionDecl>(this)) { + if (llvm::Optional<Visibility> V + = getVisibilityOf(fn->getMostRecentDecl())) + return V; + + // If the function is a specialization of a template with an + // explicit visibility attribute, use that. + if (FunctionTemplateSpecializationInfo *templateInfo + = fn->getTemplateSpecializationInfo()) + return getVisibilityOf(templateInfo->getTemplate()->getTemplatedDecl()); + + // If the function is a member of a specialization of a class template + // and the corresponding decl has explicit visibility, use that. + FunctionDecl *InstantiatedFrom = fn->getInstantiatedFromMemberFunction(); + if (InstantiatedFrom) + return getVisibilityOf(InstantiatedFrom); + + return llvm::Optional<Visibility>(); + } + + // Otherwise, just check the declaration itself first. + if (llvm::Optional<Visibility> V = getVisibilityOf(this)) + return V; + + // If there wasn't explicit visibility there, and this is a + // specialization of a class template, check for visibility + // on the pattern. + if (const ClassTemplateSpecializationDecl *spec + = dyn_cast<ClassTemplateSpecializationDecl>(this)) + return getVisibilityOf(spec->getSpecializedTemplate()->getTemplatedDecl()); + + // If this is a member class of a specialization of a class template + // and the corresponding decl has explicit visibility, use that. + if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(this)) { + CXXRecordDecl *InstantiatedFrom = RD->getInstantiatedFromMemberClass(); + if (InstantiatedFrom) + return getVisibilityOf(InstantiatedFrom); + } + + return llvm::Optional<Visibility>(); +} + +static LinkageInfo getLVForDecl(const NamedDecl *D, LVFlags Flags) { + // Objective-C: treat all Objective-C declarations as having external + // linkage. + switch (D->getKind()) { + default: + break; + case Decl::ParmVar: + return LinkageInfo::none(); + case Decl::TemplateTemplateParm: // count these as external + case Decl::NonTypeTemplateParm: + case Decl::ObjCAtDefsField: + case Decl::ObjCCategory: + case Decl::ObjCCategoryImpl: + case Decl::ObjCCompatibleAlias: + case Decl::ObjCImplementation: + case Decl::ObjCMethod: + case Decl::ObjCProperty: + case Decl::ObjCPropertyImpl: + case Decl::ObjCProtocol: + return LinkageInfo::external(); + + case Decl::CXXRecord: { + const CXXRecordDecl *Record = cast<CXXRecordDecl>(D); + if (Record->isLambda()) { + if (!Record->getLambdaManglingNumber()) { + // This lambda has no mangling number, so it's internal. + return LinkageInfo::internal(); + } + + // This lambda has its linkage/visibility determined by its owner. + const DeclContext *DC = D->getDeclContext()->getRedeclContext(); + if (Decl *ContextDecl = Record->getLambdaContextDecl()) { + if (isa<ParmVarDecl>(ContextDecl)) + DC = ContextDecl->getDeclContext()->getRedeclContext(); + else + return getLVForDecl(cast<NamedDecl>(ContextDecl), Flags); + } + + if (const NamedDecl *ND = dyn_cast<NamedDecl>(DC)) + return getLVForDecl(ND, Flags); + + return LinkageInfo::external(); + } + + break; + } + } + + // Handle linkage for namespace-scope names. + if (D->getDeclContext()->getRedeclContext()->isFileContext()) + return getLVForNamespaceScopeDecl(D, Flags); + + // C++ [basic.link]p5: + // In addition, a member function, static data member, a named + // class or enumeration of class scope, or an unnamed class or + // enumeration defined in a class-scope typedef declaration such + // that the class or enumeration has the typedef name for linkage + // purposes (7.1.3), has external linkage if the name of the class + // has external linkage. + if (D->getDeclContext()->isRecord()) + return getLVForClassMember(D, Flags); + + // C++ [basic.link]p6: + // The name of a function declared in block scope and the name of + // an object declared by a block scope extern declaration have + // linkage. If there is a visible declaration of an entity with + // linkage having the same name and type, ignoring entities + // declared outside the innermost enclosing namespace scope, the + // block scope declaration declares that same entity and receives + // the linkage of the previous declaration. If there is more than + // one such matching entity, the program is ill-formed. Otherwise, + // if no matching entity is found, the block scope entity receives + // external linkage. + if (D->getLexicalDeclContext()->isFunctionOrMethod()) { + if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { + if (Function->isInAnonymousNamespace() && + !Function->getDeclContext()->isExternCContext()) + return LinkageInfo::uniqueExternal(); + + LinkageInfo LV; + if (Flags.ConsiderVisibilityAttributes) { + if (llvm::Optional<Visibility> Vis = Function->getExplicitVisibility()) + LV.setVisibility(*Vis, true); + } + + if (const FunctionDecl *Prev = Function->getPreviousDecl()) { + LinkageInfo PrevLV = getLVForDecl(Prev, Flags); + if (PrevLV.linkage()) LV.setLinkage(PrevLV.linkage()); + LV.mergeVisibility(PrevLV); + } + + return LV; + } + + if (const VarDecl *Var = dyn_cast<VarDecl>(D)) + if (Var->getStorageClass() == SC_Extern || + Var->getStorageClass() == SC_PrivateExtern) { + if (Var->isInAnonymousNamespace() && + !Var->getDeclContext()->isExternCContext()) + return LinkageInfo::uniqueExternal(); + + LinkageInfo LV; + if (Var->getStorageClass() == SC_PrivateExtern) + LV.setVisibility(HiddenVisibility, true); + else if (Flags.ConsiderVisibilityAttributes) { + if (llvm::Optional<Visibility> Vis = Var->getExplicitVisibility()) + LV.setVisibility(*Vis, true); + } + + if (const VarDecl *Prev = Var->getPreviousDecl()) { + LinkageInfo PrevLV = getLVForDecl(Prev, Flags); + if (PrevLV.linkage()) LV.setLinkage(PrevLV.linkage()); + LV.mergeVisibility(PrevLV); + } + + return LV; + } + } + + // C++ [basic.link]p6: + // Names not covered by these rules have no linkage. + return LinkageInfo::none(); +} + +std::string NamedDecl::getQualifiedNameAsString() const { + return getQualifiedNameAsString(getASTContext().getPrintingPolicy()); +} + +std::string NamedDecl::getQualifiedNameAsString(const PrintingPolicy &P) const { + const DeclContext *Ctx = getDeclContext(); + + if (Ctx->isFunctionOrMethod()) + return getNameAsString(); + + typedef SmallVector<const DeclContext *, 8> ContextsTy; + ContextsTy Contexts; + + // Collect contexts. + while (Ctx && isa<NamedDecl>(Ctx)) { + Contexts.push_back(Ctx); + Ctx = Ctx->getParent(); + }; + + std::string QualName; + llvm::raw_string_ostream OS(QualName); + + for (ContextsTy::reverse_iterator I = Contexts.rbegin(), E = Contexts.rend(); + I != E; ++I) { + if (const ClassTemplateSpecializationDecl *Spec + = dyn_cast<ClassTemplateSpecializationDecl>(*I)) { + const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); + std::string TemplateArgsStr + = TemplateSpecializationType::PrintTemplateArgumentList( + TemplateArgs.data(), + TemplateArgs.size(), + P); + OS << Spec->getName() << TemplateArgsStr; + } else if (const NamespaceDecl *ND = dyn_cast<NamespaceDecl>(*I)) { + if (ND->isAnonymousNamespace()) + OS << "<anonymous namespace>"; + else + OS << *ND; + } else if (const RecordDecl *RD = dyn_cast<RecordDecl>(*I)) { + if (!RD->getIdentifier()) + OS << "<anonymous " << RD->getKindName() << '>'; + else + OS << *RD; + } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(*I)) { + const FunctionProtoType *FT = 0; + if (FD->hasWrittenPrototype()) + FT = dyn_cast<FunctionProtoType>(FD->getType()->getAs<FunctionType>()); + + OS << *FD << '('; + if (FT) { + unsigned NumParams = FD->getNumParams(); + for (unsigned i = 0; i < NumParams; ++i) { + if (i) + OS << ", "; + std::string Param; + FD->getParamDecl(i)->getType().getAsStringInternal(Param, P); + OS << Param; + } + + if (FT->isVariadic()) { + if (NumParams > 0) + OS << ", "; + OS << "..."; + } + } + OS << ')'; + } else { + OS << *cast<NamedDecl>(*I); + } + OS << "::"; + } + + if (getDeclName()) + OS << *this; + else + OS << "<anonymous>"; + + return OS.str(); +} + +bool NamedDecl::declarationReplaces(NamedDecl *OldD) const { + assert(getDeclName() == OldD->getDeclName() && "Declaration name mismatch"); + + // UsingDirectiveDecl's are not really NamedDecl's, and all have same name. + // We want to keep it, unless it nominates same namespace. + if (getKind() == Decl::UsingDirective) { + return cast<UsingDirectiveDecl>(this)->getNominatedNamespace() + ->getOriginalNamespace() == + cast<UsingDirectiveDecl>(OldD)->getNominatedNamespace() + ->getOriginalNamespace(); + } + + if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(this)) + // For function declarations, we keep track of redeclarations. + return FD->getPreviousDecl() == OldD; + + // For function templates, the underlying function declarations are linked. + if (const FunctionTemplateDecl *FunctionTemplate + = dyn_cast<FunctionTemplateDecl>(this)) + if (const FunctionTemplateDecl *OldFunctionTemplate + = dyn_cast<FunctionTemplateDecl>(OldD)) + return FunctionTemplate->getTemplatedDecl() + ->declarationReplaces(OldFunctionTemplate->getTemplatedDecl()); + + // For method declarations, we keep track of redeclarations. + if (isa<ObjCMethodDecl>(this)) + return false; + + if (isa<ObjCInterfaceDecl>(this) && isa<ObjCCompatibleAliasDecl>(OldD)) + return true; + + if (isa<UsingShadowDecl>(this) && isa<UsingShadowDecl>(OldD)) + return cast<UsingShadowDecl>(this)->getTargetDecl() == + cast<UsingShadowDecl>(OldD)->getTargetDecl(); + + if (isa<UsingDecl>(this) && isa<UsingDecl>(OldD)) { + ASTContext &Context = getASTContext(); + return Context.getCanonicalNestedNameSpecifier( + cast<UsingDecl>(this)->getQualifier()) == + Context.getCanonicalNestedNameSpecifier( + cast<UsingDecl>(OldD)->getQualifier()); + } + + // A typedef of an Objective-C class type can replace an Objective-C class + // declaration or definition, and vice versa. + if ((isa<TypedefNameDecl>(this) && isa<ObjCInterfaceDecl>(OldD)) || + (isa<ObjCInterfaceDecl>(this) && isa<TypedefNameDecl>(OldD))) + return true; + + // For non-function declarations, if the declarations are of the + // same kind then this must be a redeclaration, or semantic analysis + // would not have given us the new declaration. + return this->getKind() == OldD->getKind(); +} + +bool NamedDecl::hasLinkage() const { + return getLinkage() != NoLinkage; +} + +NamedDecl *NamedDecl::getUnderlyingDeclImpl() { + NamedDecl *ND = this; + while (UsingShadowDecl *UD = dyn_cast<UsingShadowDecl>(ND)) + ND = UD->getTargetDecl(); + + if (ObjCCompatibleAliasDecl *AD = dyn_cast<ObjCCompatibleAliasDecl>(ND)) + return AD->getClassInterface(); + + return ND; +} + +bool NamedDecl::isCXXInstanceMember() const { + if (!isCXXClassMember()) + return false; + + const NamedDecl *D = this; + if (isa<UsingShadowDecl>(D)) + D = cast<UsingShadowDecl>(D)->getTargetDecl(); + + if (isa<FieldDecl>(D) || isa<IndirectFieldDecl>(D)) + return true; + if (isa<CXXMethodDecl>(D)) + return cast<CXXMethodDecl>(D)->isInstance(); + if (isa<FunctionTemplateDecl>(D)) + return cast<CXXMethodDecl>(cast<FunctionTemplateDecl>(D) + ->getTemplatedDecl())->isInstance(); + return false; +} + +//===----------------------------------------------------------------------===// +// DeclaratorDecl Implementation +//===----------------------------------------------------------------------===// + +template <typename DeclT> +static SourceLocation getTemplateOrInnerLocStart(const DeclT *decl) { + if (decl->getNumTemplateParameterLists() > 0) + return decl->getTemplateParameterList(0)->getTemplateLoc(); + else + return decl->getInnerLocStart(); +} + +SourceLocation DeclaratorDecl::getTypeSpecStartLoc() const { + TypeSourceInfo *TSI = getTypeSourceInfo(); + if (TSI) return TSI->getTypeLoc().getBeginLoc(); + return SourceLocation(); +} + +void DeclaratorDecl::setQualifierInfo(NestedNameSpecifierLoc QualifierLoc) { + if (QualifierLoc) { + // Make sure the extended decl info is allocated. + if (!hasExtInfo()) { + // Save (non-extended) type source info pointer. + TypeSourceInfo *savedTInfo = DeclInfo.get<TypeSourceInfo*>(); + // Allocate external info struct. + DeclInfo = new (getASTContext()) ExtInfo; + // Restore savedTInfo into (extended) decl info. + getExtInfo()->TInfo = savedTInfo; + } + // Set qualifier info. + getExtInfo()->QualifierLoc = QualifierLoc; + } else { + // Here Qualifier == 0, i.e., we are removing the qualifier (if any). + if (hasExtInfo()) { + if (getExtInfo()->NumTemplParamLists == 0) { + // Save type source info pointer. + TypeSourceInfo *savedTInfo = getExtInfo()->TInfo; + // Deallocate the extended decl info. + getASTContext().Deallocate(getExtInfo()); + // Restore savedTInfo into (non-extended) decl info. + DeclInfo = savedTInfo; + } + else + getExtInfo()->QualifierLoc = QualifierLoc; + } + } +} + +void +DeclaratorDecl::setTemplateParameterListsInfo(ASTContext &Context, + unsigned NumTPLists, + TemplateParameterList **TPLists) { + assert(NumTPLists > 0); + // Make sure the extended decl info is allocated. + if (!hasExtInfo()) { + // Save (non-extended) type source info pointer. + TypeSourceInfo *savedTInfo = DeclInfo.get<TypeSourceInfo*>(); + // Allocate external info struct. + DeclInfo = new (getASTContext()) ExtInfo; + // Restore savedTInfo into (extended) decl info. + getExtInfo()->TInfo = savedTInfo; + } + // Set the template parameter lists info. + getExtInfo()->setTemplateParameterListsInfo(Context, NumTPLists, TPLists); +} + +SourceLocation DeclaratorDecl::getOuterLocStart() const { + return getTemplateOrInnerLocStart(this); +} + +namespace { + +// Helper function: returns true if QT is or contains a type +// having a postfix component. +bool typeIsPostfix(clang::QualType QT) { + while (true) { + const Type* T = QT.getTypePtr(); + switch (T->getTypeClass()) { + default: + return false; + case Type::Pointer: + QT = cast<PointerType>(T)->getPointeeType(); + break; + case Type::BlockPointer: + QT = cast<BlockPointerType>(T)->getPointeeType(); + break; + case Type::MemberPointer: + QT = cast<MemberPointerType>(T)->getPointeeType(); + break; + case Type::LValueReference: + case Type::RValueReference: + QT = cast<ReferenceType>(T)->getPointeeType(); + break; + case Type::PackExpansion: + QT = cast<PackExpansionType>(T)->getPattern(); + break; + case Type::Paren: + case Type::ConstantArray: + case Type::DependentSizedArray: + case Type::IncompleteArray: + case Type::VariableArray: + case Type::FunctionProto: + case Type::FunctionNoProto: + return true; + } + } +} + +} // namespace + +SourceRange DeclaratorDecl::getSourceRange() const { + SourceLocation RangeEnd = getLocation(); + if (TypeSourceInfo *TInfo = getTypeSourceInfo()) { + if (typeIsPostfix(TInfo->getType())) + RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd(); + } + return SourceRange(getOuterLocStart(), RangeEnd); +} + +void +QualifierInfo::setTemplateParameterListsInfo(ASTContext &Context, + unsigned NumTPLists, + TemplateParameterList **TPLists) { + assert((NumTPLists == 0 || TPLists != 0) && + "Empty array of template parameters with positive size!"); + + // Free previous template parameters (if any). + if (NumTemplParamLists > 0) { + Context.Deallocate(TemplParamLists); + TemplParamLists = 0; + NumTemplParamLists = 0; + } + // Set info on matched template parameter lists (if any). + if (NumTPLists > 0) { + TemplParamLists = new (Context) TemplateParameterList*[NumTPLists]; + NumTemplParamLists = NumTPLists; + for (unsigned i = NumTPLists; i-- > 0; ) + TemplParamLists[i] = TPLists[i]; + } +} + +//===----------------------------------------------------------------------===// +// VarDecl Implementation +//===----------------------------------------------------------------------===// + +const char *VarDecl::getStorageClassSpecifierString(StorageClass SC) { + switch (SC) { + case SC_None: break; + case SC_Auto: return "auto"; + case SC_Extern: return "extern"; + case SC_OpenCLWorkGroupLocal: return "<<work-group-local>>"; + case SC_PrivateExtern: return "__private_extern__"; + case SC_Register: return "register"; + case SC_Static: return "static"; + } + + llvm_unreachable("Invalid storage class"); +} + +VarDecl *VarDecl::Create(ASTContext &C, DeclContext *DC, + SourceLocation StartL, SourceLocation IdL, + IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, + StorageClass S, StorageClass SCAsWritten) { + return new (C) VarDecl(Var, DC, StartL, IdL, Id, T, TInfo, S, SCAsWritten); +} + +VarDecl *VarDecl::CreateDeserialized(ASTContext &C, unsigned ID) { + void *Mem = AllocateDeserializedDecl(C, ID, sizeof(VarDecl)); + return new (Mem) VarDecl(Var, 0, SourceLocation(), SourceLocation(), 0, + QualType(), 0, SC_None, SC_None); +} + +void VarDecl::setStorageClass(StorageClass SC) { + assert(isLegalForVariable(SC)); + if (getStorageClass() != SC) + ClearLinkageCache(); + + VarDeclBits.SClass = SC; +} + +SourceRange VarDecl::getSourceRange() const { + if (getInit()) + return SourceRange(getOuterLocStart(), getInit()->getLocEnd()); + return DeclaratorDecl::getSourceRange(); +} + +bool VarDecl::isExternC() const { + if (getLinkage() != ExternalLinkage) + return false; + + const DeclContext *DC = getDeclContext(); + if (DC->isRecord()) + return false; + + ASTContext &Context = getASTContext(); + if (!Context.getLangOpts().CPlusPlus) + return true; + return DC->isExternCContext(); +} + +VarDecl *VarDecl::getCanonicalDecl() { + return getFirstDeclaration(); +} + +VarDecl::DefinitionKind VarDecl::isThisDeclarationADefinition( + ASTContext &C) const +{ + // C++ [basic.def]p2: + // A declaration is a definition unless [...] it contains the 'extern' + // specifier or a linkage-specification and neither an initializer [...], + // it declares a static data member in a class declaration [...]. + // C++ [temp.expl.spec]p15: + // An explicit specialization of a static data member of a template is a + // definition if the declaration includes an initializer; otherwise, it is + // a declaration. + if (isStaticDataMember()) { + if (isOutOfLine() && (hasInit() || + getTemplateSpecializationKind() != TSK_ExplicitSpecialization)) + return Definition; + else + return DeclarationOnly; + } + // C99 6.7p5: + // A definition of an identifier is a declaration for that identifier that + // [...] causes storage to be reserved for that object. + // Note: that applies for all non-file-scope objects. + // C99 6.9.2p1: + // If the declaration of an identifier for an object has file scope and an + // initializer, the declaration is an external definition for the identifier + if (hasInit()) + return Definition; + // AST for 'extern "C" int foo;' is annotated with 'extern'. + if (hasExternalStorage()) + return DeclarationOnly; + + if (getStorageClassAsWritten() == SC_Extern || + getStorageClassAsWritten() == SC_PrivateExtern) { + for (const VarDecl *PrevVar = getPreviousDecl(); + PrevVar; PrevVar = PrevVar->getPreviousDecl()) { + if (PrevVar->getLinkage() == InternalLinkage && PrevVar->hasInit()) + return DeclarationOnly; + } + } + // C99 6.9.2p2: + // A declaration of an object that has file scope without an initializer, + // and without a storage class specifier or the scs 'static', constitutes + // a tentative definition. + // No such thing in C++. + if (!C.getLangOpts().CPlusPlus && isFileVarDecl()) + return TentativeDefinition; + + // What's left is (in C, block-scope) declarations without initializers or + // external storage. These are definitions. + return Definition; +} + +VarDecl *VarDecl::getActingDefinition() { + DefinitionKind Kind = isThisDeclarationADefinition(); + if (Kind != TentativeDefinition) + return 0; + + VarDecl *LastTentative = 0; + VarDecl *First = getFirstDeclaration(); + for (redecl_iterator I = First->redecls_begin(), E = First->redecls_end(); + I != E; ++I) { + Kind = (*I)->isThisDeclarationADefinition(); + if (Kind == Definition) + return 0; + else if (Kind == TentativeDefinition) + LastTentative = *I; + } + return LastTentative; +} + +bool VarDecl::isTentativeDefinitionNow() const { + DefinitionKind Kind = isThisDeclarationADefinition(); + if (Kind != TentativeDefinition) + return false; + + for (redecl_iterator I = redecls_begin(), E = redecls_end(); I != E; ++I) { + if ((*I)->isThisDeclarationADefinition() == Definition) + return false; + } + return true; +} + +VarDecl *VarDecl::getDefinition(ASTContext &C) { + VarDecl *First = getFirstDeclaration(); + for (redecl_iterator I = First->redecls_begin(), E = First->redecls_end(); + I != E; ++I) { + if ((*I)->isThisDeclarationADefinition(C) == Definition) + return *I; + } + return 0; +} + +VarDecl::DefinitionKind VarDecl::hasDefinition(ASTContext &C) const { + DefinitionKind Kind = DeclarationOnly; + + const VarDecl *First = getFirstDeclaration(); + for (redecl_iterator I = First->redecls_begin(), E = First->redecls_end(); + I != E; ++I) { + Kind = std::max(Kind, (*I)->isThisDeclarationADefinition(C)); + if (Kind == Definition) + break; + } + + return Kind; +} + +const Expr *VarDecl::getAnyInitializer(const VarDecl *&D) const { + redecl_iterator I = redecls_begin(), E = redecls_end(); + while (I != E && !I->getInit()) + ++I; + + if (I != E) { + D = *I; + return I->getInit(); + } + return 0; +} + +bool VarDecl::isOutOfLine() const { + if (Decl::isOutOfLine()) + return true; + + if (!isStaticDataMember()) + return false; + + // If this static data member was instantiated from a static data member of + // a class template, check whether that static data member was defined + // out-of-line. + if (VarDecl *VD = getInstantiatedFromStaticDataMember()) + return VD->isOutOfLine(); + + return false; +} + +VarDecl *VarDecl::getOutOfLineDefinition() { + if (!isStaticDataMember()) + return 0; + + for (VarDecl::redecl_iterator RD = redecls_begin(), RDEnd = redecls_end(); + RD != RDEnd; ++RD) { + if (RD->getLexicalDeclContext()->isFileContext()) + return *RD; + } + + return 0; +} + +void VarDecl::setInit(Expr *I) { + if (EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>()) { + Eval->~EvaluatedStmt(); + getASTContext().Deallocate(Eval); + } + + Init = I; +} + +bool VarDecl::isUsableInConstantExpressions(ASTContext &C) const { + const LangOptions &Lang = C.getLangOpts(); + + if (!Lang.CPlusPlus) + return false; + + // In C++11, any variable of reference type can be used in a constant + // expression if it is initialized by a constant expression. + if (Lang.CPlusPlus0x && getType()->isReferenceType()) + return true; + + // Only const objects can be used in constant expressions in C++. C++98 does + // not require the variable to be non-volatile, but we consider this to be a + // defect. + if (!getType().isConstQualified() || getType().isVolatileQualified()) + return false; + + // In C++, const, non-volatile variables of integral or enumeration types + // can be used in constant expressions. + if (getType()->isIntegralOrEnumerationType()) + return true; + + // Additionally, in C++11, non-volatile constexpr variables can be used in + // constant expressions. + return Lang.CPlusPlus0x && isConstexpr(); +} + +/// Convert the initializer for this declaration to the elaborated EvaluatedStmt +/// form, which contains extra information on the evaluated value of the +/// initializer. +EvaluatedStmt *VarDecl::ensureEvaluatedStmt() const { + EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>(); + if (!Eval) { + Stmt *S = Init.get<Stmt *>(); + Eval = new (getASTContext()) EvaluatedStmt; + Eval->Value = S; + Init = Eval; + } + return Eval; +} + +APValue *VarDecl::evaluateValue() const { + llvm::SmallVector<PartialDiagnosticAt, 8> Notes; + return evaluateValue(Notes); +} + +APValue *VarDecl::evaluateValue( + llvm::SmallVectorImpl<PartialDiagnosticAt> &Notes) const { + EvaluatedStmt *Eval = ensureEvaluatedStmt(); + + // We only produce notes indicating why an initializer is non-constant the + // first time it is evaluated. FIXME: The notes won't always be emitted the + // first time we try evaluation, so might not be produced at all. + if (Eval->WasEvaluated) + return Eval->Evaluated.isUninit() ? 0 : &Eval->Evaluated; + + const Expr *Init = cast<Expr>(Eval->Value); + assert(!Init->isValueDependent()); + + if (Eval->IsEvaluating) { + // FIXME: Produce a diagnostic for self-initialization. + Eval->CheckedICE = true; + Eval->IsICE = false; + return 0; + } + + Eval->IsEvaluating = true; + + bool Result = Init->EvaluateAsInitializer(Eval->Evaluated, getASTContext(), + this, Notes); + + // Ensure the result is an uninitialized APValue if evaluation fails. + if (!Result) + Eval->Evaluated = APValue(); + + Eval->IsEvaluating = false; + Eval->WasEvaluated = true; + + // In C++11, we have determined whether the initializer was a constant + // expression as a side-effect. + if (getASTContext().getLangOpts().CPlusPlus0x && !Eval->CheckedICE) { + Eval->CheckedICE = true; + Eval->IsICE = Result && Notes.empty(); + } + + return Result ? &Eval->Evaluated : 0; +} + +bool VarDecl::checkInitIsICE() const { + // Initializers of weak variables are never ICEs. + if (isWeak()) + return false; + + EvaluatedStmt *Eval = ensureEvaluatedStmt(); + if (Eval->CheckedICE) + // We have already checked whether this subexpression is an + // integral constant expression. + return Eval->IsICE; + + const Expr *Init = cast<Expr>(Eval->Value); + assert(!Init->isValueDependent()); + + // In C++11, evaluate the initializer to check whether it's a constant + // expression. + if (getASTContext().getLangOpts().CPlusPlus0x) { + llvm::SmallVector<PartialDiagnosticAt, 8> Notes; + evaluateValue(Notes); + return Eval->IsICE; + } + + // It's an ICE whether or not the definition we found is + // out-of-line. See DR 721 and the discussion in Clang PR + // 6206 for details. + + if (Eval->CheckingICE) + return false; + Eval->CheckingICE = true; + + Eval->IsICE = Init->isIntegerConstantExpr(getASTContext()); + Eval->CheckingICE = false; + Eval->CheckedICE = true; + return Eval->IsICE; +} + +bool VarDecl::extendsLifetimeOfTemporary() const { + assert(getType()->isReferenceType() &&"Non-references never extend lifetime"); + + const Expr *E = getInit(); + if (!E) + return false; + + if (const ExprWithCleanups *Cleanups = dyn_cast<ExprWithCleanups>(E)) + E = Cleanups->getSubExpr(); + + return isa<MaterializeTemporaryExpr>(E); +} + +VarDecl *VarDecl::getInstantiatedFromStaticDataMember() const { + if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) + return cast<VarDecl>(MSI->getInstantiatedFrom()); + + return 0; +} + +TemplateSpecializationKind VarDecl::getTemplateSpecializationKind() const { + if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) + return MSI->getTemplateSpecializationKind(); + + return TSK_Undeclared; +} + +MemberSpecializationInfo *VarDecl::getMemberSpecializationInfo() const { + return getASTContext().getInstantiatedFromStaticDataMember(this); +} + +void VarDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK, + SourceLocation PointOfInstantiation) { + MemberSpecializationInfo *MSI = getMemberSpecializationInfo(); + assert(MSI && "Not an instantiated static data member?"); + MSI->setTemplateSpecializationKind(TSK); + if (TSK != TSK_ExplicitSpecialization && + PointOfInstantiation.isValid() && + MSI->getPointOfInstantiation().isInvalid()) + MSI->setPointOfInstantiation(PointOfInstantiation); +} + +//===----------------------------------------------------------------------===// +// ParmVarDecl Implementation +//===----------------------------------------------------------------------===// + +ParmVarDecl *ParmVarDecl::Create(ASTContext &C, DeclContext *DC, + SourceLocation StartLoc, + SourceLocation IdLoc, IdentifierInfo *Id, + QualType T, TypeSourceInfo *TInfo, + StorageClass S, StorageClass SCAsWritten, + Expr *DefArg) { + return new (C) ParmVarDecl(ParmVar, DC, StartLoc, IdLoc, Id, T, TInfo, + S, SCAsWritten, DefArg); +} + +ParmVarDecl *ParmVarDecl::CreateDeserialized(ASTContext &C, unsigned ID) { + void *Mem = AllocateDeserializedDecl(C, ID, sizeof(ParmVarDecl)); + return new (Mem) ParmVarDecl(ParmVar, 0, SourceLocation(), SourceLocation(), + 0, QualType(), 0, SC_None, SC_None, 0); +} + +SourceRange ParmVarDecl::getSourceRange() const { + if (!hasInheritedDefaultArg()) { + SourceRange ArgRange = getDefaultArgRange(); + if (ArgRange.isValid()) + return SourceRange(getOuterLocStart(), ArgRange.getEnd()); + } + + return DeclaratorDecl::getSourceRange(); +} + +Expr *ParmVarDecl::getDefaultArg() { + assert(!hasUnparsedDefaultArg() && "Default argument is not yet parsed!"); + assert(!hasUninstantiatedDefaultArg() && + "Default argument is not yet instantiated!"); + + Expr *Arg = getInit(); + if (ExprWithCleanups *E = dyn_cast_or_null<ExprWithCleanups>(Arg)) + return E->getSubExpr(); + + return Arg; +} + +SourceRange ParmVarDecl::getDefaultArgRange() const { + if (const Expr *E = getInit()) + return E->getSourceRange(); + + if (hasUninstantiatedDefaultArg()) + return getUninstantiatedDefaultArg()->getSourceRange(); + + return SourceRange(); +} + +bool ParmVarDecl::isParameterPack() const { + return isa<PackExpansionType>(getType()); +} + +void ParmVarDecl::setParameterIndexLarge(unsigned parameterIndex) { + getASTContext().setParameterIndex(this, parameterIndex); + ParmVarDeclBits.ParameterIndex = ParameterIndexSentinel; +} + +unsigned ParmVarDecl::getParameterIndexLarge() const { + return getASTContext().getParameterIndex(this); +} + +//===----------------------------------------------------------------------===// +// FunctionDecl Implementation +//===----------------------------------------------------------------------===// + +void FunctionDecl::getNameForDiagnostic(std::string &S, + const PrintingPolicy &Policy, + bool Qualified) const { + NamedDecl::getNameForDiagnostic(S, Policy, Qualified); + const TemplateArgumentList *TemplateArgs = getTemplateSpecializationArgs(); + if (TemplateArgs) + S += TemplateSpecializationType::PrintTemplateArgumentList( + TemplateArgs->data(), + TemplateArgs->size(), + Policy); + +} + +bool FunctionDecl::isVariadic() const { + if (const FunctionProtoType *FT = getType()->getAs<FunctionProtoType>()) + return FT->isVariadic(); + return false; +} + +bool FunctionDecl::hasBody(const FunctionDecl *&Definition) const { + for (redecl_iterator I = redecls_begin(), E = redecls_end(); I != E; ++I) { + if (I->Body || I->IsLateTemplateParsed) { + Definition = *I; + return true; + } + } + + return false; +} + +bool FunctionDecl::hasTrivialBody() const +{ + Stmt *S = getBody(); + if (!S) { + // Since we don't have a body for this function, we don't know if it's + // trivial or not. + return false; + } + + if (isa<CompoundStmt>(S) && cast<CompoundStmt>(S)->body_empty()) + return true; + return false; +} + +bool FunctionDecl::isDefined(const FunctionDecl *&Definition) const { + for (redecl_iterator I = redecls_begin(), E = redecls_end(); I != E; ++I) { + if (I->IsDeleted || I->IsDefaulted || I->Body || I->IsLateTemplateParsed) { + Definition = I->IsDeleted ? I->getCanonicalDecl() : *I; + return true; + } + } + + return false; +} + +Stmt *FunctionDecl::getBody(const FunctionDecl *&Definition) const { + for (redecl_iterator I = redecls_begin(), E = redecls_end(); I != E; ++I) { + if (I->Body) { + Definition = *I; + return I->Body.get(getASTContext().getExternalSource()); + } else if (I->IsLateTemplateParsed) { + Definition = *I; + return 0; + } + } + + return 0; +} + +void FunctionDecl::setBody(Stmt *B) { + Body = B; + if (B) + EndRangeLoc = B->getLocEnd(); +} + +void FunctionDecl::setPure(bool P) { + IsPure = P; + if (P) + if (CXXRecordDecl *Parent = dyn_cast<CXXRecordDecl>(getDeclContext())) + Parent->markedVirtualFunctionPure(); +} + +bool FunctionDecl::isMain() const { + const TranslationUnitDecl *tunit = + dyn_cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext()); + return tunit && + !tunit->getASTContext().getLangOpts().Freestanding && + getIdentifier() && + getIdentifier()->isStr("main"); +} + +bool FunctionDecl::isReservedGlobalPlacementOperator() const { + assert(getDeclName().getNameKind() == DeclarationName::CXXOperatorName); + assert(getDeclName().getCXXOverloadedOperator() == OO_New || + getDeclName().getCXXOverloadedOperator() == OO_Delete || + getDeclName().getCXXOverloadedOperator() == OO_Array_New || + getDeclName().getCXXOverloadedOperator() == OO_Array_Delete); + + if (isa<CXXRecordDecl>(getDeclContext())) return false; + assert(getDeclContext()->getRedeclContext()->isTranslationUnit()); + + const FunctionProtoType *proto = getType()->castAs<FunctionProtoType>(); + if (proto->getNumArgs() != 2 || proto->isVariadic()) return false; + + ASTContext &Context = + cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext()) + ->getASTContext(); + + // The result type and first argument type are constant across all + // these operators. The second argument must be exactly void*. + return (proto->getArgType(1).getCanonicalType() == Context.VoidPtrTy); +} + +bool FunctionDecl::isExternC() const { + if (getLinkage() != ExternalLinkage) + return false; + + if (getAttr<OverloadableAttr>()) + return false; + + const DeclContext *DC = getDeclContext(); + if (DC->isRecord()) + return false; + + ASTContext &Context = getASTContext(); + if (!Context.getLangOpts().CPlusPlus) + return true; + + return isMain() || DC->isExternCContext(); +} + +bool FunctionDecl::isGlobal() const { + if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(this)) + return Method->isStatic(); + + if (getStorageClass() == SC_Static) + return false; + + for (const DeclContext *DC = getDeclContext(); + DC->isNamespace(); + DC = DC->getParent()) { + if (const NamespaceDecl *Namespace = cast<NamespaceDecl>(DC)) { + if (!Namespace->getDeclName()) + return false; + break; + } + } + + return true; +} + +void +FunctionDecl::setPreviousDeclaration(FunctionDecl *PrevDecl) { + redeclarable_base::setPreviousDeclaration(PrevDecl); + + if (FunctionTemplateDecl *FunTmpl = getDescribedFunctionTemplate()) { + FunctionTemplateDecl *PrevFunTmpl + = PrevDecl? PrevDecl->getDescribedFunctionTemplate() : 0; + assert((!PrevDecl || PrevFunTmpl) && "Function/function template mismatch"); + FunTmpl->setPreviousDeclaration(PrevFunTmpl); + } + + if (PrevDecl && PrevDecl->IsInline) + IsInline = true; +} + +const FunctionDecl *FunctionDecl::getCanonicalDecl() const { + return getFirstDeclaration(); +} + +FunctionDecl *FunctionDecl::getCanonicalDecl() { + return getFirstDeclaration(); +} + +void FunctionDecl::setStorageClass(StorageClass SC) { + assert(isLegalForFunction(SC)); + if (getStorageClass() != SC) + ClearLinkageCache(); + + SClass = SC; +} + +/// \brief Returns a value indicating whether this function +/// corresponds to a builtin function. +/// +/// The function corresponds to a built-in function if it is +/// declared at translation scope or within an extern "C" block and +/// its name matches with the name of a builtin. The returned value +/// will be 0 for functions that do not correspond to a builtin, a +/// value of type \c Builtin::ID if in the target-independent range +/// \c [1,Builtin::First), or a target-specific builtin value. +unsigned FunctionDecl::getBuiltinID() const { + if (!getIdentifier()) + return 0; + + unsigned BuiltinID = getIdentifier()->getBuiltinID(); + if (!BuiltinID) + return 0; + + ASTContext &Context = getASTContext(); + if (!Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) + return BuiltinID; + + // This function has the name of a known C library + // function. Determine whether it actually refers to the C library + // function or whether it just has the same name. + + // If this is a static function, it's not a builtin. + if (getStorageClass() == SC_Static) + return 0; + + // If this function is at translation-unit scope and we're not in + // C++, it refers to the C library function. + if (!Context.getLangOpts().CPlusPlus && + getDeclContext()->isTranslationUnit()) + return BuiltinID; + + // If the function is in an extern "C" linkage specification and is + // not marked "overloadable", it's the real function. + if (isa<LinkageSpecDecl>(getDeclContext()) && + cast<LinkageSpecDecl>(getDeclContext())->getLanguage() + == LinkageSpecDecl::lang_c && + !getAttr<OverloadableAttr>()) + return BuiltinID; + + // Not a builtin + return 0; +} + + +/// getNumParams - Return the number of parameters this function must have +/// based on its FunctionType. This is the length of the ParamInfo array +/// after it has been created. +unsigned FunctionDecl::getNumParams() const { + const FunctionType *FT = getType()->getAs<FunctionType>(); + if (isa<FunctionNoProtoType>(FT)) + return 0; + return cast<FunctionProtoType>(FT)->getNumArgs(); + +} + +void FunctionDecl::setParams(ASTContext &C, + llvm::ArrayRef<ParmVarDecl *> NewParamInfo) { + assert(ParamInfo == 0 && "Already has param info!"); + assert(NewParamInfo.size() == getNumParams() && "Parameter count mismatch!"); + + // Zero params -> null pointer. + if (!NewParamInfo.empty()) { + ParamInfo = new (C) ParmVarDecl*[NewParamInfo.size()]; + std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo); + } +} + +void FunctionDecl::setDeclsInPrototypeScope(llvm::ArrayRef<NamedDecl *> NewDecls) { + assert(DeclsInPrototypeScope.empty() && "Already has prototype decls!"); + + if (!NewDecls.empty()) { + NamedDecl **A = new (getASTContext()) NamedDecl*[NewDecls.size()]; + std::copy(NewDecls.begin(), NewDecls.end(), A); + DeclsInPrototypeScope = llvm::ArrayRef<NamedDecl*>(A, NewDecls.size()); + } +} + +/// getMinRequiredArguments - Returns the minimum number of arguments +/// needed to call this function. This may be fewer than the number of +/// function parameters, if some of the parameters have default +/// arguments (in C++) or the last parameter is a parameter pack. +unsigned FunctionDecl::getMinRequiredArguments() const { + if (!getASTContext().getLangOpts().CPlusPlus) + return getNumParams(); + + unsigned NumRequiredArgs = getNumParams(); + + // If the last parameter is a parameter pack, we don't need an argument for + // it. + if (NumRequiredArgs > 0 && + getParamDecl(NumRequiredArgs - 1)->isParameterPack()) + --NumRequiredArgs; + + // If this parameter has a default argument, we don't need an argument for + // it. + while (NumRequiredArgs > 0 && + getParamDecl(NumRequiredArgs-1)->hasDefaultArg()) + --NumRequiredArgs; + + // We might have parameter packs before the end. These can't be deduced, + // but they can still handle multiple arguments. + unsigned ArgIdx = NumRequiredArgs; + while (ArgIdx > 0) { + if (getParamDecl(ArgIdx - 1)->isParameterPack()) + NumRequiredArgs = ArgIdx; + + --ArgIdx; + } + + return NumRequiredArgs; +} + +bool FunctionDecl::isInlined() const { + if (IsInline) + return true; + + if (isa<CXXMethodDecl>(this)) { + if (!isOutOfLine() || getCanonicalDecl()->isInlineSpecified()) + return true; + } + + switch (getTemplateSpecializationKind()) { + case TSK_Undeclared: + case TSK_ExplicitSpecialization: + return false; + + case TSK_ImplicitInstantiation: + case TSK_ExplicitInstantiationDeclaration: + case TSK_ExplicitInstantiationDefinition: + // Handle below. + break; + } + + const FunctionDecl *PatternDecl = getTemplateInstantiationPattern(); + bool HasPattern = false; + if (PatternDecl) + HasPattern = PatternDecl->hasBody(PatternDecl); + + if (HasPattern && PatternDecl) + return PatternDecl->isInlined(); + + return false; +} + +static bool RedeclForcesDefC99(const FunctionDecl *Redecl) { + // Only consider file-scope declarations in this test. + if (!Redecl->getLexicalDeclContext()->isTranslationUnit()) + return false; + + // Only consider explicit declarations; the presence of a builtin for a + // libcall shouldn't affect whether a definition is externally visible. + if (Redecl->isImplicit()) + return false; + + if (!Redecl->isInlineSpecified() || Redecl->getStorageClass() == SC_Extern) + return true; // Not an inline definition + + return false; +} + +/// \brief For a function declaration in C or C++, determine whether this +/// declaration causes the definition to be externally visible. +/// +/// Specifically, this determines if adding the current declaration to the set +/// of redeclarations of the given functions causes +/// isInlineDefinitionExternallyVisible to change from false to true. +bool FunctionDecl::doesDeclarationForceExternallyVisibleDefinition() const { + assert(!doesThisDeclarationHaveABody() && + "Must have a declaration without a body."); + + ASTContext &Context = getASTContext(); + + if (Context.getLangOpts().GNUInline || hasAttr<GNUInlineAttr>()) { + // With GNU inlining, a declaration with 'inline' but not 'extern', forces + // an externally visible definition. + // + // FIXME: What happens if gnu_inline gets added on after the first + // declaration? + if (!isInlineSpecified() || getStorageClassAsWritten() == SC_Extern) + return false; + + const FunctionDecl *Prev = this; + bool FoundBody = false; + while ((Prev = Prev->getPreviousDecl())) { + FoundBody |= Prev->Body; + + if (Prev->Body) { + // If it's not the case that both 'inline' and 'extern' are + // specified on the definition, then it is always externally visible. + if (!Prev->isInlineSpecified() || + Prev->getStorageClassAsWritten() != SC_Extern) + return false; + } else if (Prev->isInlineSpecified() && + Prev->getStorageClassAsWritten() != SC_Extern) { + return false; + } + } + return FoundBody; + } + + if (Context.getLangOpts().CPlusPlus) + return false; + + // C99 6.7.4p6: + // [...] If all of the file scope declarations for a function in a + // translation unit include the inline function specifier without extern, + // then the definition in that translation unit is an inline definition. + if (isInlineSpecified() && getStorageClass() != SC_Extern) + return false; + const FunctionDecl *Prev = this; + bool FoundBody = false; + while ((Prev = Prev->getPreviousDecl())) { + FoundBody |= Prev->Body; + if (RedeclForcesDefC99(Prev)) + return false; + } + return FoundBody; +} + +/// \brief For an inline function definition in C or C++, determine whether the +/// definition will be externally visible. +/// +/// Inline function definitions are always available for inlining optimizations. +/// However, depending on the language dialect, declaration specifiers, and +/// attributes, the definition of an inline function may or may not be +/// "externally" visible to other translation units in the program. +/// +/// In C99, inline definitions are not externally visible by default. However, +/// if even one of the global-scope declarations is marked "extern inline", the +/// inline definition becomes externally visible (C99 6.7.4p6). +/// +/// In GNU89 mode, or if the gnu_inline attribute is attached to the function +/// definition, we use the GNU semantics for inline, which are nearly the +/// opposite of C99 semantics. In particular, "inline" by itself will create +/// an externally visible symbol, but "extern inline" will not create an +/// externally visible symbol. +bool FunctionDecl::isInlineDefinitionExternallyVisible() const { + assert(doesThisDeclarationHaveABody() && "Must have the function definition"); + assert(isInlined() && "Function must be inline"); + ASTContext &Context = getASTContext(); + + if (Context.getLangOpts().GNUInline || hasAttr<GNUInlineAttr>()) { + // Note: If you change the logic here, please change + // doesDeclarationForceExternallyVisibleDefinition as well. + // + // If it's not the case that both 'inline' and 'extern' are + // specified on the definition, then this inline definition is + // externally visible. + if (!(isInlineSpecified() && getStorageClassAsWritten() == SC_Extern)) + return true; + + // If any declaration is 'inline' but not 'extern', then this definition + // is externally visible. + for (redecl_iterator Redecl = redecls_begin(), RedeclEnd = redecls_end(); + Redecl != RedeclEnd; + ++Redecl) { + if (Redecl->isInlineSpecified() && + Redecl->getStorageClassAsWritten() != SC_Extern) + return true; + } + + return false; + } + + // C99 6.7.4p6: + // [...] If all of the file scope declarations for a function in a + // translation unit include the inline function specifier without extern, + // then the definition in that translation unit is an inline definition. + for (redecl_iterator Redecl = redecls_begin(), RedeclEnd = redecls_end(); + Redecl != RedeclEnd; + ++Redecl) { + if (RedeclForcesDefC99(*Redecl)) + return true; + } + + // C99 6.7.4p6: + // An inline definition does not provide an external definition for the + // function, and does not forbid an external definition in another + // translation unit. + return false; +} + +/// getOverloadedOperator - Which C++ overloaded operator this +/// function represents, if any. +OverloadedOperatorKind FunctionDecl::getOverloadedOperator() const { + if (getDeclName().getNameKind() == DeclarationName::CXXOperatorName) + return getDeclName().getCXXOverloadedOperator(); + else + return OO_None; +} + +/// getLiteralIdentifier - The literal suffix identifier this function +/// represents, if any. +const IdentifierInfo *FunctionDecl::getLiteralIdentifier() const { + if (getDeclName().getNameKind() == DeclarationName::CXXLiteralOperatorName) + return getDeclName().getCXXLiteralIdentifier(); + else + return 0; +} + +FunctionDecl::TemplatedKind FunctionDecl::getTemplatedKind() const { + if (TemplateOrSpecialization.isNull()) + return TK_NonTemplate; + if (TemplateOrSpecialization.is<FunctionTemplateDecl *>()) + return TK_FunctionTemplate; + if (TemplateOrSpecialization.is<MemberSpecializationInfo *>()) + return TK_MemberSpecialization; + if (TemplateOrSpecialization.is<FunctionTemplateSpecializationInfo *>()) + return TK_FunctionTemplateSpecialization; + if (TemplateOrSpecialization.is + <DependentFunctionTemplateSpecializationInfo*>()) + return TK_DependentFunctionTemplateSpecialization; + + llvm_unreachable("Did we miss a TemplateOrSpecialization type?"); +} + +FunctionDecl *FunctionDecl::getInstantiatedFromMemberFunction() const { + if (MemberSpecializationInfo *Info = getMemberSpecializationInfo()) + return cast<FunctionDecl>(Info->getInstantiatedFrom()); + + return 0; +} + +MemberSpecializationInfo *FunctionDecl::getMemberSpecializationInfo() const { + return TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>(); +} + +void +FunctionDecl::setInstantiationOfMemberFunction(ASTContext &C, + FunctionDecl *FD, + TemplateSpecializationKind TSK) { + assert(TemplateOrSpecialization.isNull() && + "Member function is already a specialization"); + MemberSpecializationInfo *Info + = new (C) MemberSpecializationInfo(FD, TSK); + TemplateOrSpecialization = Info; +} + +bool FunctionDecl::isImplicitlyInstantiable() const { + // If the function is invalid, it can't be implicitly instantiated. + if (isInvalidDecl()) + return false; + + switch (getTemplateSpecializationKind()) { + case TSK_Undeclared: + case TSK_ExplicitInstantiationDefinition: + return false; + + case TSK_ImplicitInstantiation: + return true; + + // It is possible to instantiate TSK_ExplicitSpecialization kind + // if the FunctionDecl has a class scope specialization pattern. + case TSK_ExplicitSpecialization: + return getClassScopeSpecializationPattern() != 0; + + case TSK_ExplicitInstantiationDeclaration: + // Handled below. + break; + } + + // Find the actual template from which we will instantiate. + const FunctionDecl *PatternDecl = getTemplateInstantiationPattern(); + bool HasPattern = false; + if (PatternDecl) + HasPattern = PatternDecl->hasBody(PatternDecl); + + // C++0x [temp.explicit]p9: + // Except for inline functions, other explicit instantiation declarations + // have the effect of suppressing the implicit instantiation of the entity + // to which they refer. + if (!HasPattern || !PatternDecl) + return true; + + return PatternDecl->isInlined(); +} + +bool FunctionDecl::isTemplateInstantiation() const { + switch (getTemplateSpecializationKind()) { + case TSK_Undeclared: + case TSK_ExplicitSpecialization: + return false; + case TSK_ImplicitInstantiation: + case TSK_ExplicitInstantiationDeclaration: + case TSK_ExplicitInstantiationDefinition: + return true; + } + llvm_unreachable("All TSK values handled."); +} + +FunctionDecl *FunctionDecl::getTemplateInstantiationPattern() const { + // Handle class scope explicit specialization special case. + if (getTemplateSpecializationKind() == TSK_ExplicitSpecialization) + return getClassScopeSpecializationPattern(); + + if (FunctionTemplateDecl *Primary = getPrimaryTemplate()) { + while (Primary->getInstantiatedFromMemberTemplate()) { + // If we have hit a point where the user provided a specialization of + // this template, we're done looking. + if (Primary->isMemberSpecialization()) + break; + + Primary = Primary->getInstantiatedFromMemberTemplate(); + } + + return Primary->getTemplatedDecl(); + } + + return getInstantiatedFromMemberFunction(); +} + +FunctionTemplateDecl *FunctionDecl::getPrimaryTemplate() const { + if (FunctionTemplateSpecializationInfo *Info + = TemplateOrSpecialization + .dyn_cast<FunctionTemplateSpecializationInfo*>()) { + return Info->Template.getPointer(); + } + return 0; +} + +FunctionDecl *FunctionDecl::getClassScopeSpecializationPattern() const { + return getASTContext().getClassScopeSpecializationPattern(this); +} + +const TemplateArgumentList * +FunctionDecl::getTemplateSpecializationArgs() const { + if (FunctionTemplateSpecializationInfo *Info + = TemplateOrSpecialization + .dyn_cast<FunctionTemplateSpecializationInfo*>()) { + return Info->TemplateArguments; + } + return 0; +} + +const ASTTemplateArgumentListInfo * +FunctionDecl::getTemplateSpecializationArgsAsWritten() const { + if (FunctionTemplateSpecializationInfo *Info + = TemplateOrSpecialization + .dyn_cast<FunctionTemplateSpecializationInfo*>()) { + return Info->TemplateArgumentsAsWritten; + } + return 0; +} + +void +FunctionDecl::setFunctionTemplateSpecialization(ASTContext &C, + FunctionTemplateDecl *Template, + const TemplateArgumentList *TemplateArgs, + void *InsertPos, + TemplateSpecializationKind TSK, + const TemplateArgumentListInfo *TemplateArgsAsWritten, + SourceLocation PointOfInstantiation) { + assert(TSK != TSK_Undeclared && + "Must specify the type of function template specialization"); + FunctionTemplateSpecializationInfo *Info + = TemplateOrSpecialization.dyn_cast<FunctionTemplateSpecializationInfo*>(); + if (!Info) + Info = FunctionTemplateSpecializationInfo::Create(C, this, Template, TSK, + TemplateArgs, + TemplateArgsAsWritten, + PointOfInstantiation); + TemplateOrSpecialization = Info; + Template->addSpecialization(Info, InsertPos); +} + +void +FunctionDecl::setDependentTemplateSpecialization(ASTContext &Context, + const UnresolvedSetImpl &Templates, + const TemplateArgumentListInfo &TemplateArgs) { + assert(TemplateOrSpecialization.isNull()); + size_t Size = sizeof(DependentFunctionTemplateSpecializationInfo); + Size += Templates.size() * sizeof(FunctionTemplateDecl*); + Size += TemplateArgs.size() * sizeof(TemplateArgumentLoc); + void *Buffer = Context.Allocate(Size); + DependentFunctionTemplateSpecializationInfo *Info = + new (Buffer) DependentFunctionTemplateSpecializationInfo(Templates, + TemplateArgs); + TemplateOrSpecialization = Info; +} + +DependentFunctionTemplateSpecializationInfo:: +DependentFunctionTemplateSpecializationInfo(const UnresolvedSetImpl &Ts, + const TemplateArgumentListInfo &TArgs) + : AngleLocs(TArgs.getLAngleLoc(), TArgs.getRAngleLoc()) { + + d.NumTemplates = Ts.size(); + d.NumArgs = TArgs.size(); + + FunctionTemplateDecl **TsArray = + const_cast<FunctionTemplateDecl**>(getTemplates()); + for (unsigned I = 0, E = Ts.size(); I != E; ++I) + TsArray[I] = cast<FunctionTemplateDecl>(Ts[I]->getUnderlyingDecl()); + + TemplateArgumentLoc *ArgsArray = + const_cast<TemplateArgumentLoc*>(getTemplateArgs()); + for (unsigned I = 0, E = TArgs.size(); I != E; ++I) + new (&ArgsArray[I]) TemplateArgumentLoc(TArgs[I]); +} + +TemplateSpecializationKind FunctionDecl::getTemplateSpecializationKind() const { + // For a function template specialization, query the specialization + // information object. + FunctionTemplateSpecializationInfo *FTSInfo + = TemplateOrSpecialization.dyn_cast<FunctionTemplateSpecializationInfo*>(); + if (FTSInfo) + return FTSInfo->getTemplateSpecializationKind(); + + MemberSpecializationInfo *MSInfo + = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>(); + if (MSInfo) + return MSInfo->getTemplateSpecializationKind(); + + return TSK_Undeclared; +} + +void +FunctionDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK, + SourceLocation PointOfInstantiation) { + if (FunctionTemplateSpecializationInfo *FTSInfo + = TemplateOrSpecialization.dyn_cast< + FunctionTemplateSpecializationInfo*>()) { + FTSInfo->setTemplateSpecializationKind(TSK); + if (TSK != TSK_ExplicitSpecialization && + PointOfInstantiation.isValid() && + FTSInfo->getPointOfInstantiation().isInvalid()) + FTSInfo->setPointOfInstantiation(PointOfInstantiation); + } else if (MemberSpecializationInfo *MSInfo + = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>()) { + MSInfo->setTemplateSpecializationKind(TSK); + if (TSK != TSK_ExplicitSpecialization && + PointOfInstantiation.isValid() && + MSInfo->getPointOfInstantiation().isInvalid()) + MSInfo->setPointOfInstantiation(PointOfInstantiation); + } else + llvm_unreachable("Function cannot have a template specialization kind"); +} + +SourceLocation FunctionDecl::getPointOfInstantiation() const { + if (FunctionTemplateSpecializationInfo *FTSInfo + = TemplateOrSpecialization.dyn_cast< + FunctionTemplateSpecializationInfo*>()) + return FTSInfo->getPointOfInstantiation(); + else if (MemberSpecializationInfo *MSInfo + = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>()) + return MSInfo->getPointOfInstantiation(); + + return SourceLocation(); +} + +bool FunctionDecl::isOutOfLine() const { + if (Decl::isOutOfLine()) + return true; + + // If this function was instantiated from a member function of a + // class template, check whether that member function was defined out-of-line. + if (FunctionDecl *FD = getInstantiatedFromMemberFunction()) { + const FunctionDecl *Definition; + if (FD->hasBody(Definition)) + return Definition->isOutOfLine(); + } + + // If this function was instantiated from a function template, + // check whether that function template was defined out-of-line. + if (FunctionTemplateDecl *FunTmpl = getPrimaryTemplate()) { + const FunctionDecl *Definition; + if (FunTmpl->getTemplatedDecl()->hasBody(Definition)) + return Definition->isOutOfLine(); + } + + return false; +} + +SourceRange FunctionDecl::getSourceRange() const { + return SourceRange(getOuterLocStart(), EndRangeLoc); +} + +unsigned FunctionDecl::getMemoryFunctionKind() const { + IdentifierInfo *FnInfo = getIdentifier(); + + if (!FnInfo) + return 0; + + // Builtin handling. + switch (getBuiltinID()) { + case Builtin::BI__builtin_memset: + case Builtin::BI__builtin___memset_chk: + case Builtin::BImemset: + return Builtin::BImemset; + + case Builtin::BI__builtin_memcpy: + case Builtin::BI__builtin___memcpy_chk: + case Builtin::BImemcpy: + return Builtin::BImemcpy; + + case Builtin::BI__builtin_memmove: + case Builtin::BI__builtin___memmove_chk: + case Builtin::BImemmove: + return Builtin::BImemmove; + + case Builtin::BIstrlcpy: + return Builtin::BIstrlcpy; + case Builtin::BIstrlcat: + return Builtin::BIstrlcat; + + case Builtin::BI__builtin_memcmp: + case Builtin::BImemcmp: + return Builtin::BImemcmp; + + case Builtin::BI__builtin_strncpy: + case Builtin::BI__builtin___strncpy_chk: + case Builtin::BIstrncpy: + return Builtin::BIstrncpy; + + case Builtin::BI__builtin_strncmp: + case Builtin::BIstrncmp: + return Builtin::BIstrncmp; + + case Builtin::BI__builtin_strncasecmp: + case Builtin::BIstrncasecmp: + return Builtin::BIstrncasecmp; + + case Builtin::BI__builtin_strncat: + case Builtin::BI__builtin___strncat_chk: + case Builtin::BIstrncat: + return Builtin::BIstrncat; + + case Builtin::BI__builtin_strndup: + case Builtin::BIstrndup: + return Builtin::BIstrndup; + + case Builtin::BI__builtin_strlen: + case Builtin::BIstrlen: + return Builtin::BIstrlen; + + default: + if (isExternC()) { + if (FnInfo->isStr("memset")) + return Builtin::BImemset; + else if (FnInfo->isStr("memcpy")) + return Builtin::BImemcpy; + else if (FnInfo->isStr("memmove")) + return Builtin::BImemmove; + else if (FnInfo->isStr("memcmp")) + return Builtin::BImemcmp; + else if (FnInfo->isStr("strncpy")) + return Builtin::BIstrncpy; + else if (FnInfo->isStr("strncmp")) + return Builtin::BIstrncmp; + else if (FnInfo->isStr("strncasecmp")) + return Builtin::BIstrncasecmp; + else if (FnInfo->isStr("strncat")) + return Builtin::BIstrncat; + else if (FnInfo->isStr("strndup")) + return Builtin::BIstrndup; + else if (FnInfo->isStr("strlen")) + return Builtin::BIstrlen; + } + break; + } + return 0; +} + +//===----------------------------------------------------------------------===// +// FieldDecl Implementation +//===----------------------------------------------------------------------===// + +FieldDecl *FieldDecl::Create(const ASTContext &C, DeclContext *DC, + SourceLocation StartLoc, SourceLocation IdLoc, + IdentifierInfo *Id, QualType T, + TypeSourceInfo *TInfo, Expr *BW, bool Mutable, + bool HasInit) { + return new (C) FieldDecl(Decl::Field, DC, StartLoc, IdLoc, Id, T, TInfo, + BW, Mutable, HasInit); +} + +FieldDecl *FieldDecl::CreateDeserialized(ASTContext &C, unsigned ID) { + void *Mem = AllocateDeserializedDecl(C, ID, sizeof(FieldDecl)); + return new (Mem) FieldDecl(Field, 0, SourceLocation(), SourceLocation(), + 0, QualType(), 0, 0, false, false); +} + +bool FieldDecl::isAnonymousStructOrUnion() const { + if (!isImplicit() || getDeclName()) + return false; + + if (const RecordType *Record = getType()->getAs<RecordType>()) + return Record->getDecl()->isAnonymousStructOrUnion(); + + return false; +} + +unsigned FieldDecl::getBitWidthValue(const ASTContext &Ctx) const { + assert(isBitField() && "not a bitfield"); + Expr *BitWidth = InitializerOrBitWidth.getPointer(); + return BitWidth->EvaluateKnownConstInt(Ctx).getZExtValue(); +} + +unsigned FieldDecl::getFieldIndex() const { + if (CachedFieldIndex) return CachedFieldIndex - 1; + + unsigned Index = 0; + const RecordDecl *RD = getParent(); + const FieldDecl *LastFD = 0; + bool IsMsStruct = RD->hasAttr<MsStructAttr>(); + + for (RecordDecl::field_iterator I = RD->field_begin(), E = RD->field_end(); + I != E; ++I, ++Index) { + (*I)->CachedFieldIndex = Index + 1; + + if (IsMsStruct) { + // Zero-length bitfields following non-bitfield members are ignored. + if (getASTContext().ZeroBitfieldFollowsNonBitfield((*I), LastFD)) { + --Index; + continue; + } + LastFD = (*I); + } + } + + assert(CachedFieldIndex && "failed to find field in parent"); + return CachedFieldIndex - 1; +} + +SourceRange FieldDecl::getSourceRange() const { + if (const Expr *E = InitializerOrBitWidth.getPointer()) + return SourceRange(getInnerLocStart(), E->getLocEnd()); + return DeclaratorDecl::getSourceRange(); +} + +void FieldDecl::setInClassInitializer(Expr *Init) { + assert(!InitializerOrBitWidth.getPointer() && + "bit width or initializer already set"); + InitializerOrBitWidth.setPointer(Init); + InitializerOrBitWidth.setInt(0); +} + +//===----------------------------------------------------------------------===// +// TagDecl Implementation +//===----------------------------------------------------------------------===// + +SourceLocation TagDecl::getOuterLocStart() const { + return getTemplateOrInnerLocStart(this); +} + +SourceRange TagDecl::getSourceRange() const { + SourceLocation E = RBraceLoc.isValid() ? RBraceLoc : getLocation(); + return SourceRange(getOuterLocStart(), E); +} + +TagDecl* TagDecl::getCanonicalDecl() { + return getFirstDeclaration(); +} + +void TagDecl::setTypedefNameForAnonDecl(TypedefNameDecl *TDD) { + TypedefNameDeclOrQualifier = TDD; + if (TypeForDecl) + const_cast<Type*>(TypeForDecl)->ClearLinkageCache(); + ClearLinkageCache(); +} + +void TagDecl::startDefinition() { + IsBeingDefined = true; + + if (isa<CXXRecordDecl>(this)) { + CXXRecordDecl *D = cast<CXXRecordDecl>(this); + struct CXXRecordDecl::DefinitionData *Data = + new (getASTContext()) struct CXXRecordDecl::DefinitionData(D); + for (redecl_iterator I = redecls_begin(), E = redecls_end(); I != E; ++I) + cast<CXXRecordDecl>(*I)->DefinitionData = Data; + } +} + +void TagDecl::completeDefinition() { + assert((!isa<CXXRecordDecl>(this) || + cast<CXXRecordDecl>(this)->hasDefinition()) && + "definition completed but not started"); + + IsCompleteDefinition = true; + IsBeingDefined = false; + + if (ASTMutationListener *L = getASTMutationListener()) + L->CompletedTagDefinition(this); +} + +TagDecl *TagDecl::getDefinition() const { + if (isCompleteDefinition()) + return const_cast<TagDecl *>(this); + if (const CXXRecordDecl *CXXRD = dyn_cast<CXXRecordDecl>(this)) + return CXXRD->getDefinition(); + + for (redecl_iterator R = redecls_begin(), REnd = redecls_end(); + R != REnd; ++R) + if (R->isCompleteDefinition()) + return *R; + + return 0; +} + +void TagDecl::setQualifierInfo(NestedNameSpecifierLoc QualifierLoc) { + if (QualifierLoc) { + // Make sure the extended qualifier info is allocated. + if (!hasExtInfo()) + TypedefNameDeclOrQualifier = new (getASTContext()) ExtInfo; + // Set qualifier info. + getExtInfo()->QualifierLoc = QualifierLoc; + } else { + // Here Qualifier == 0, i.e., we are removing the qualifier (if any). + if (hasExtInfo()) { + if (getExtInfo()->NumTemplParamLists == 0) { + getASTContext().Deallocate(getExtInfo()); + TypedefNameDeclOrQualifier = (TypedefNameDecl*) 0; + } + else + getExtInfo()->QualifierLoc = QualifierLoc; + } + } +} + +void TagDecl::setTemplateParameterListsInfo(ASTContext &Context, + unsigned NumTPLists, + TemplateParameterList **TPLists) { + assert(NumTPLists > 0); + // Make sure the extended decl info is allocated. + if (!hasExtInfo()) + // Allocate external info struct. + TypedefNameDeclOrQualifier = new (getASTContext()) ExtInfo; + // Set the template parameter lists info. + getExtInfo()->setTemplateParameterListsInfo(Context, NumTPLists, TPLists); +} + +//===----------------------------------------------------------------------===// +// EnumDecl Implementation +//===----------------------------------------------------------------------===// + +void EnumDecl::anchor() { } + +EnumDecl *EnumDecl::Create(ASTContext &C, DeclContext *DC, + SourceLocation StartLoc, SourceLocation IdLoc, + IdentifierInfo *Id, + EnumDecl *PrevDecl, bool IsScoped, + bool IsScopedUsingClassTag, bool IsFixed) { + EnumDecl *Enum = new (C) EnumDecl(DC, StartLoc, IdLoc, Id, PrevDecl, + IsScoped, IsScopedUsingClassTag, IsFixed); + C.getTypeDeclType(Enum, PrevDecl); + return Enum; +} + +EnumDecl *EnumDecl::CreateDeserialized(ASTContext &C, unsigned ID) { + void *Mem = AllocateDeserializedDecl(C, ID, sizeof(EnumDecl)); + return new (Mem) EnumDecl(0, SourceLocation(), SourceLocation(), 0, 0, + false, false, false); +} + +void EnumDecl::completeDefinition(QualType NewType, + QualType NewPromotionType, + unsigned NumPositiveBits, + unsigned NumNegativeBits) { + assert(!isCompleteDefinition() && "Cannot redefine enums!"); + if (!IntegerType) + IntegerType = NewType.getTypePtr(); + PromotionType = NewPromotionType; + setNumPositiveBits(NumPositiveBits); + setNumNegativeBits(NumNegativeBits); + TagDecl::completeDefinition(); +} + +TemplateSpecializationKind EnumDecl::getTemplateSpecializationKind() const { + if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) + return MSI->getTemplateSpecializationKind(); + + return TSK_Undeclared; +} + +void EnumDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK, + SourceLocation PointOfInstantiation) { + MemberSpecializationInfo *MSI = getMemberSpecializationInfo(); + assert(MSI && "Not an instantiated member enumeration?"); + MSI->setTemplateSpecializationKind(TSK); + if (TSK != TSK_ExplicitSpecialization && + PointOfInstantiation.isValid() && + MSI->getPointOfInstantiation().isInvalid()) + MSI->setPointOfInstantiation(PointOfInstantiation); +} + +EnumDecl *EnumDecl::getInstantiatedFromMemberEnum() const { + if (SpecializationInfo) + return cast<EnumDecl>(SpecializationInfo->getInstantiatedFrom()); + + return 0; +} + +void EnumDecl::setInstantiationOfMemberEnum(ASTContext &C, EnumDecl *ED, + TemplateSpecializationKind TSK) { + assert(!SpecializationInfo && "Member enum is already a specialization"); + SpecializationInfo = new (C) MemberSpecializationInfo(ED, TSK); +} + +//===----------------------------------------------------------------------===// +// RecordDecl Implementation +//===----------------------------------------------------------------------===// + +RecordDecl::RecordDecl(Kind DK, TagKind TK, DeclContext *DC, + SourceLocation StartLoc, SourceLocation IdLoc, + IdentifierInfo *Id, RecordDecl *PrevDecl) + : TagDecl(DK, TK, DC, IdLoc, Id, PrevDecl, StartLoc) { + HasFlexibleArrayMember = false; + AnonymousStructOrUnion = false; + HasObjectMember = false; + LoadedFieldsFromExternalStorage = false; + assert(classof(static_cast<Decl*>(this)) && "Invalid Kind!"); +} + +RecordDecl *RecordDecl::Create(const ASTContext &C, TagKind TK, DeclContext *DC, + SourceLocation StartLoc, SourceLocation IdLoc, + IdentifierInfo *Id, RecordDecl* PrevDecl) { + RecordDecl* R = new (C) RecordDecl(Record, TK, DC, StartLoc, IdLoc, Id, + PrevDecl); + C.getTypeDeclType(R, PrevDecl); + return R; +} + +RecordDecl *RecordDecl::CreateDeserialized(const ASTContext &C, unsigned ID) { + void *Mem = AllocateDeserializedDecl(C, ID, sizeof(RecordDecl)); + return new (Mem) RecordDecl(Record, TTK_Struct, 0, SourceLocation(), + SourceLocation(), 0, 0); +} + +bool RecordDecl::isInjectedClassName() const { + return isImplicit() && getDeclName() && getDeclContext()->isRecord() && + cast<RecordDecl>(getDeclContext())->getDeclName() == getDeclName(); +} + +RecordDecl::field_iterator RecordDecl::field_begin() const { + if (hasExternalLexicalStorage() && !LoadedFieldsFromExternalStorage) + LoadFieldsFromExternalStorage(); + + return field_iterator(decl_iterator(FirstDecl)); +} + +/// completeDefinition - Notes that the definition of this type is now +/// complete. +void RecordDecl::completeDefinition() { + assert(!isCompleteDefinition() && "Cannot redefine record!"); + TagDecl::completeDefinition(); +} + +void RecordDecl::LoadFieldsFromExternalStorage() const { + ExternalASTSource *Source = getASTContext().getExternalSource(); + assert(hasExternalLexicalStorage() && Source && "No external storage?"); + + // Notify that we have a RecordDecl doing some initialization. + ExternalASTSource::Deserializing TheFields(Source); + + SmallVector<Decl*, 64> Decls; + LoadedFieldsFromExternalStorage = true; + switch (Source->FindExternalLexicalDeclsBy<FieldDecl>(this, Decls)) { + case ELR_Success: + break; + + case ELR_AlreadyLoaded: + case ELR_Failure: + return; + } + +#ifndef NDEBUG + // Check that all decls we got were FieldDecls. + for (unsigned i=0, e=Decls.size(); i != e; ++i) + assert(isa<FieldDecl>(Decls[i])); +#endif + + if (Decls.empty()) + return; + + llvm::tie(FirstDecl, LastDecl) = BuildDeclChain(Decls, + /*FieldsAlreadyLoaded=*/false); +} + +//===----------------------------------------------------------------------===// +// BlockDecl Implementation +//===----------------------------------------------------------------------===// + +void BlockDecl::setParams(llvm::ArrayRef<ParmVarDecl *> NewParamInfo) { + assert(ParamInfo == 0 && "Already has param info!"); + + // Zero params -> null pointer. + if (!NewParamInfo.empty()) { + NumParams = NewParamInfo.size(); + ParamInfo = new (getASTContext()) ParmVarDecl*[NewParamInfo.size()]; + std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo); + } +} + +void BlockDecl::setCaptures(ASTContext &Context, + const Capture *begin, + const Capture *end, + bool capturesCXXThis) { + CapturesCXXThis = capturesCXXThis; + + if (begin == end) { + NumCaptures = 0; + Captures = 0; + return; + } + + NumCaptures = end - begin; + + // Avoid new Capture[] because we don't want to provide a default + // constructor. + size_t allocationSize = NumCaptures * sizeof(Capture); + void *buffer = Context.Allocate(allocationSize, /*alignment*/sizeof(void*)); + memcpy(buffer, begin, allocationSize); + Captures = static_cast<Capture*>(buffer); +} + +bool BlockDecl::capturesVariable(const VarDecl *variable) const { + for (capture_const_iterator + i = capture_begin(), e = capture_end(); i != e; ++i) + // Only auto vars can be captured, so no redeclaration worries. + if (i->getVariable() == variable) + return true; + + return false; +} + +SourceRange BlockDecl::getSourceRange() const { + return SourceRange(getLocation(), Body? Body->getLocEnd() : getLocation()); +} + +//===----------------------------------------------------------------------===// +// Other Decl Allocation/Deallocation Method Implementations +//===----------------------------------------------------------------------===// + +void TranslationUnitDecl::anchor() { } + +TranslationUnitDecl *TranslationUnitDecl::Create(ASTContext &C) { + return new (C) TranslationUnitDecl(C); +} + +void LabelDecl::anchor() { } + +LabelDecl *LabelDecl::Create(ASTContext &C, DeclContext *DC, + SourceLocation IdentL, IdentifierInfo *II) { + return new (C) LabelDecl(DC, IdentL, II, 0, IdentL); +} + +LabelDecl *LabelDecl::Create(ASTContext &C, DeclContext *DC, + SourceLocation IdentL, IdentifierInfo *II, + SourceLocation GnuLabelL) { + assert(GnuLabelL != IdentL && "Use this only for GNU local labels"); + return new (C) LabelDecl(DC, IdentL, II, 0, GnuLabelL); +} + +LabelDecl *LabelDecl::CreateDeserialized(ASTContext &C, unsigned ID) { + void *Mem = AllocateDeserializedDecl(C, ID, sizeof(LabelDecl)); + return new (Mem) LabelDecl(0, SourceLocation(), 0, 0, SourceLocation()); +} + +void ValueDecl::anchor() { } + +void ImplicitParamDecl::anchor() { } + +ImplicitParamDecl *ImplicitParamDecl::Create(ASTContext &C, DeclContext *DC, + SourceLocation IdLoc, + IdentifierInfo *Id, + QualType Type) { + return new (C) ImplicitParamDecl(DC, IdLoc, Id, Type); +} + +ImplicitParamDecl *ImplicitParamDecl::CreateDeserialized(ASTContext &C, + unsigned ID) { + void *Mem = AllocateDeserializedDecl(C, ID, sizeof(ImplicitParamDecl)); + return new (Mem) ImplicitParamDecl(0, SourceLocation(), 0, QualType()); +} + +FunctionDecl *FunctionDecl::Create(ASTContext &C, DeclContext *DC, + SourceLocation StartLoc, + const DeclarationNameInfo &NameInfo, + QualType T, TypeSourceInfo *TInfo, + StorageClass SC, StorageClass SCAsWritten, + bool isInlineSpecified, + bool hasWrittenPrototype, + bool isConstexprSpecified) { + FunctionDecl *New = new (C) FunctionDecl(Function, DC, StartLoc, NameInfo, + T, TInfo, SC, SCAsWritten, + isInlineSpecified, + isConstexprSpecified); + New->HasWrittenPrototype = hasWrittenPrototype; + return New; +} + +FunctionDecl *FunctionDecl::CreateDeserialized(ASTContext &C, unsigned ID) { + void *Mem = AllocateDeserializedDecl(C, ID, sizeof(FunctionDecl)); + return new (Mem) FunctionDecl(Function, 0, SourceLocation(), + DeclarationNameInfo(), QualType(), 0, + SC_None, SC_None, false, false); +} + +BlockDecl *BlockDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L) { + return new (C) BlockDecl(DC, L); +} + +BlockDecl *BlockDecl::CreateDeserialized(ASTContext &C, unsigned ID) { + void *Mem = AllocateDeserializedDecl(C, ID, sizeof(BlockDecl)); + return new (Mem) BlockDecl(0, SourceLocation()); +} + +EnumConstantDecl *EnumConstantDecl::Create(ASTContext &C, EnumDecl *CD, + SourceLocation L, + IdentifierInfo *Id, QualType T, + Expr *E, const llvm::APSInt &V) { + return new (C) EnumConstantDecl(CD, L, Id, T, E, V); +} + +EnumConstantDecl * +EnumConstantDecl::CreateDeserialized(ASTContext &C, unsigned ID) { + void *Mem = AllocateDeserializedDecl(C, ID, sizeof(EnumConstantDecl)); + return new (Mem) EnumConstantDecl(0, SourceLocation(), 0, QualType(), 0, + llvm::APSInt()); +} + +void IndirectFieldDecl::anchor() { } + +IndirectFieldDecl * +IndirectFieldDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L, + IdentifierInfo *Id, QualType T, NamedDecl **CH, + unsigned CHS) { + return new (C) IndirectFieldDecl(DC, L, Id, T, CH, CHS); +} + +IndirectFieldDecl *IndirectFieldDecl::CreateDeserialized(ASTContext &C, + unsigned ID) { + void *Mem = AllocateDeserializedDecl(C, ID, sizeof(IndirectFieldDecl)); + return new (Mem) IndirectFieldDecl(0, SourceLocation(), DeclarationName(), + QualType(), 0, 0); +} + +SourceRange EnumConstantDecl::getSourceRange() const { + SourceLocation End = getLocation(); + if (Init) + End = Init->getLocEnd(); + return SourceRange(getLocation(), End); +} + +void TypeDecl::anchor() { } + +TypedefDecl *TypedefDecl::Create(ASTContext &C, DeclContext *DC, + SourceLocation StartLoc, SourceLocation IdLoc, + IdentifierInfo *Id, TypeSourceInfo *TInfo) { + return new (C) TypedefDecl(DC, StartLoc, IdLoc, Id, TInfo); +} + +void TypedefNameDecl::anchor() { } + +TypedefDecl *TypedefDecl::CreateDeserialized(ASTContext &C, unsigned ID) { + void *Mem = AllocateDeserializedDecl(C, ID, sizeof(TypedefDecl)); + return new (Mem) TypedefDecl(0, SourceLocation(), SourceLocation(), 0, 0); +} + +TypeAliasDecl *TypeAliasDecl::Create(ASTContext &C, DeclContext *DC, + SourceLocation StartLoc, + SourceLocation IdLoc, IdentifierInfo *Id, + TypeSourceInfo *TInfo) { + return new (C) TypeAliasDecl(DC, StartLoc, IdLoc, Id, TInfo); +} + +TypeAliasDecl *TypeAliasDecl::CreateDeserialized(ASTContext &C, unsigned ID) { + void *Mem = AllocateDeserializedDecl(C, ID, sizeof(TypeAliasDecl)); + return new (Mem) TypeAliasDecl(0, SourceLocation(), SourceLocation(), 0, 0); +} + +SourceRange TypedefDecl::getSourceRange() const { + SourceLocation RangeEnd = getLocation(); + if (TypeSourceInfo *TInfo = getTypeSourceInfo()) { + if (typeIsPostfix(TInfo->getType())) + RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd(); + } + return SourceRange(getLocStart(), RangeEnd); +} + +SourceRange TypeAliasDecl::getSourceRange() const { + SourceLocation RangeEnd = getLocStart(); + if (TypeSourceInfo *TInfo = getTypeSourceInfo()) + RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd(); + return SourceRange(getLocStart(), RangeEnd); +} + +void FileScopeAsmDecl::anchor() { } + +FileScopeAsmDecl *FileScopeAsmDecl::Create(ASTContext &C, DeclContext *DC, + StringLiteral *Str, + SourceLocation AsmLoc, + SourceLocation RParenLoc) { + return new (C) FileScopeAsmDecl(DC, Str, AsmLoc, RParenLoc); +} + +FileScopeAsmDecl *FileScopeAsmDecl::CreateDeserialized(ASTContext &C, + unsigned ID) { + void *Mem = AllocateDeserializedDecl(C, ID, sizeof(FileScopeAsmDecl)); + return new (Mem) FileScopeAsmDecl(0, 0, SourceLocation(), SourceLocation()); +} + +//===----------------------------------------------------------------------===// +// ImportDecl Implementation +//===----------------------------------------------------------------------===// + +/// \brief Retrieve the number of module identifiers needed to name the given +/// module. +static unsigned getNumModuleIdentifiers(Module *Mod) { + unsigned Result = 1; + while (Mod->Parent) { + Mod = Mod->Parent; + ++Result; + } + return Result; +} + +ImportDecl::ImportDecl(DeclContext *DC, SourceLocation StartLoc, + Module *Imported, + ArrayRef<SourceLocation> IdentifierLocs) + : Decl(Import, DC, StartLoc), ImportedAndComplete(Imported, true), + NextLocalImport() +{ + assert(getNumModuleIdentifiers(Imported) == IdentifierLocs.size()); + SourceLocation *StoredLocs = reinterpret_cast<SourceLocation *>(this + 1); + memcpy(StoredLocs, IdentifierLocs.data(), + IdentifierLocs.size() * sizeof(SourceLocation)); +} + +ImportDecl::ImportDecl(DeclContext *DC, SourceLocation StartLoc, + Module *Imported, SourceLocation EndLoc) + : Decl(Import, DC, StartLoc), ImportedAndComplete(Imported, false), + NextLocalImport() +{ + *reinterpret_cast<SourceLocation *>(this + 1) = EndLoc; +} + +ImportDecl *ImportDecl::Create(ASTContext &C, DeclContext *DC, + SourceLocation StartLoc, Module *Imported, + ArrayRef<SourceLocation> IdentifierLocs) { + void *Mem = C.Allocate(sizeof(ImportDecl) + + IdentifierLocs.size() * sizeof(SourceLocation)); + return new (Mem) ImportDecl(DC, StartLoc, Imported, IdentifierLocs); +} + +ImportDecl *ImportDecl::CreateImplicit(ASTContext &C, DeclContext *DC, + SourceLocation StartLoc, + Module *Imported, + SourceLocation EndLoc) { + void *Mem = C.Allocate(sizeof(ImportDecl) + sizeof(SourceLocation)); + ImportDecl *Import = new (Mem) ImportDecl(DC, StartLoc, Imported, EndLoc); + Import->setImplicit(); + return Import; +} + +ImportDecl *ImportDecl::CreateDeserialized(ASTContext &C, unsigned ID, + unsigned NumLocations) { + void *Mem = AllocateDeserializedDecl(C, ID, + (sizeof(ImportDecl) + + NumLocations * sizeof(SourceLocation))); + return new (Mem) ImportDecl(EmptyShell()); +} + +ArrayRef<SourceLocation> ImportDecl::getIdentifierLocs() const { + if (!ImportedAndComplete.getInt()) + return ArrayRef<SourceLocation>(); + + const SourceLocation *StoredLocs + = reinterpret_cast<const SourceLocation *>(this + 1); + return ArrayRef<SourceLocation>(StoredLocs, + getNumModuleIdentifiers(getImportedModule())); +} + +SourceRange ImportDecl::getSourceRange() const { + if (!ImportedAndComplete.getInt()) + return SourceRange(getLocation(), + *reinterpret_cast<const SourceLocation *>(this + 1)); + + return SourceRange(getLocation(), getIdentifierLocs().back()); +} |