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-rw-r--r--clang/lib/AST/Decl.cpp3057
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diff --git a/clang/lib/AST/Decl.cpp b/clang/lib/AST/Decl.cpp
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+//===--- 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());
+}