void NestedNameSpecifierLocBuilder::MakeTrivial(ASTContext &Context,
NestedNameSpecifier *Qualifier,
SourceRange R) {
Representation = Qualifier;
// Construct bogus (but well-formed) source information for the
// nested-name-specifier.
BufferSize = 0;
SmallVector<NestedNameSpecifier *, 4> Stack;
for (NestedNameSpecifier *NNS = Qualifier; NNS; NNS = NNS->getPrefix())
Stack.push_back(NNS);
while (!Stack.empty()) {
NestedNameSpecifier *NNS = Stack.back();
Stack.pop_back();
switch (NNS->getKind()) {
case NestedNameSpecifier::Identifier:
case NestedNameSpecifier::Namespace:
case NestedNameSpecifier::NamespaceAlias:
SaveSourceLocation(R.getBegin(), Buffer, BufferSize, BufferCapacity);
break;
case NestedNameSpecifier::TypeSpec:
case NestedNameSpecifier::TypeSpecWithTemplate: {
TypeSourceInfo *TSInfo
= Context.getTrivialTypeSourceInfo(QualType(NNS->getAsType(), 0),
R.getBegin());
SavePointer(TSInfo->getTypeLoc().getOpaqueData(), Buffer, BufferSize,
BufferCapacity);
break;
}
case NestedNameSpecifier::Global:
break;
}
// Save the location of the '::'.
SaveSourceLocation(Stack.empty()? R.getEnd() : R.getBegin(),
Buffer, BufferSize, BufferCapacity);
}
}
/// \brief Compute the DeclContext that is associated with the given
/// scope specifier.
///
/// \param SS the C++ scope specifier as it appears in the source
///
/// \param EnteringContext when true, we will be entering the context of
/// this scope specifier, so we can retrieve the declaration context of a
/// class template or class template partial specialization even if it is
/// not the current instantiation.
///
/// \returns the declaration context represented by the scope specifier @p SS,
/// or NULL if the declaration context cannot be computed (e.g., because it is
/// dependent and not the current instantiation).
DeclContext *Sema::computeDeclContext(const CXXScopeSpec &SS,
bool EnteringContext) {
if (!SS.isSet() || SS.isInvalid())
return 0;
NestedNameSpecifier *NNS
= static_cast<NestedNameSpecifier *>(SS.getScopeRep());
if (NNS->isDependent()) {
// If this nested-name-specifier refers to the current
// instantiation, return its DeclContext.
if (CXXRecordDecl *Record = getCurrentInstantiationOf(NNS))
return Record;
if (EnteringContext) {
const Type *NNSType = NNS->getAsType();
if (!NNSType) {
return 0;
}
// Look through type alias templates, per C++0x [temp.dep.type]p1.
NNSType = Context.getCanonicalType(NNSType);
if (const TemplateSpecializationType *SpecType
= NNSType->getAs<TemplateSpecializationType>()) {
// We are entering the context of the nested name specifier, so try to
// match the nested name specifier to either a primary class template
// or a class template partial specialization.
if (ClassTemplateDecl *ClassTemplate
= dyn_cast_or_null<ClassTemplateDecl>(
SpecType->getTemplateName().getAsTemplateDecl())) {
QualType ContextType
= Context.getCanonicalType(QualType(SpecType, 0));
// If the type of the nested name specifier is the same as the
// injected class name of the named class template, we're entering
// into that class template definition.
QualType Injected
= ClassTemplate->getInjectedClassNameSpecialization();
if (Context.hasSameType(Injected, ContextType))
return ClassTemplate->getTemplatedDecl();
// If the type of the nested name specifier is the same as the
// type of one of the class template's class template partial
// specializations, we're entering into the definition of that
// class template partial specialization.
if (ClassTemplatePartialSpecializationDecl *PartialSpec
= ClassTemplate->findPartialSpecialization(ContextType))
return PartialSpec;
}
} else if (const RecordType *RecordT = NNSType->getAs<RecordType>()) {
// The nested name specifier refers to a member of a class template.
return RecordT->getDecl();
}
}
return 0;
}
switch (NNS->getKind()) {
case NestedNameSpecifier::Identifier:
llvm_unreachable("Dependent nested-name-specifier has no DeclContext");
case NestedNameSpecifier::Namespace:
return NNS->getAsNamespace();
case NestedNameSpecifier::NamespaceAlias:
return NNS->getAsNamespaceAlias()->getNamespace();
case NestedNameSpecifier::TypeSpec:
case NestedNameSpecifier::TypeSpecWithTemplate: {
const TagType *Tag = NNS->getAsType()->getAs<TagType>();
assert(Tag && "Non-tag type in nested-name-specifier");
return Tag->getDecl();
} break;
case NestedNameSpecifier::Global:
return Context.getTranslationUnitDecl();
}
// Required to silence a GCC warning.
return 0;
}
/// Compute the DeclContext that is associated with the given
/// scope specifier.
///
/// \param SS the C++ scope specifier as it appears in the source
///
/// \param EnteringContext when true, we will be entering the context of
/// this scope specifier, so we can retrieve the declaration context of a
/// class template or class template partial specialization even if it is
/// not the current instantiation.
///
/// \returns the declaration context represented by the scope specifier @p SS,
/// or NULL if the declaration context cannot be computed (e.g., because it is
/// dependent and not the current instantiation).
DeclContext *Sema::computeDeclContext(const CXXScopeSpec &SS,
bool EnteringContext) {
if (!SS.isSet() || SS.isInvalid())
return nullptr;
NestedNameSpecifier *NNS = SS.getScopeRep();
if (NNS->isDependent()) {
// If this nested-name-specifier refers to the current
// instantiation, return its DeclContext.
if (CXXRecordDecl *Record = getCurrentInstantiationOf(NNS))
return Record;
if (EnteringContext) {
const Type *NNSType = NNS->getAsType();
if (!NNSType) {
return nullptr;
}
// Look through type alias templates, per C++0x [temp.dep.type]p1.
NNSType = Context.getCanonicalType(NNSType);
if (const TemplateSpecializationType *SpecType
= NNSType->getAs<TemplateSpecializationType>()) {
// We are entering the context of the nested name specifier, so try to
// match the nested name specifier to either a primary class template
// or a class template partial specialization.
if (ClassTemplateDecl *ClassTemplate
= dyn_cast_or_null<ClassTemplateDecl>(
SpecType->getTemplateName().getAsTemplateDecl())) {
QualType ContextType
= Context.getCanonicalType(QualType(SpecType, 0));
// If the type of the nested name specifier is the same as the
// injected class name of the named class template, we're entering
// into that class template definition.
QualType Injected
= ClassTemplate->getInjectedClassNameSpecialization();
if (Context.hasSameType(Injected, ContextType))
return ClassTemplate->getTemplatedDecl();
// If the type of the nested name specifier is the same as the
// type of one of the class template's class template partial
// specializations, we're entering into the definition of that
// class template partial specialization.
if (ClassTemplatePartialSpecializationDecl *PartialSpec
= ClassTemplate->findPartialSpecialization(ContextType)) {
// A declaration of the partial specialization must be visible.
// We can always recover here, because this only happens when we're
// entering the context, and that can't happen in a SFINAE context.
assert(!isSFINAEContext() &&
"partial specialization scope specifier in SFINAE context?");
if (!hasVisibleDeclaration(PartialSpec))
diagnoseMissingImport(SS.getLastQualifierNameLoc(), PartialSpec,
MissingImportKind::PartialSpecialization,
/*Recover*/true);
return PartialSpec;
}
}
} else if (const RecordType *RecordT = NNSType->getAs<RecordType>()) {
// The nested name specifier refers to a member of a class template.
return RecordT->getDecl();
}
}
return nullptr;
}
switch (NNS->getKind()) {
case NestedNameSpecifier::Identifier:
llvm_unreachable("Dependent nested-name-specifier has no DeclContext");
case NestedNameSpecifier::Namespace:
return NNS->getAsNamespace();
case NestedNameSpecifier::NamespaceAlias:
return NNS->getAsNamespaceAlias()->getNamespace();
case NestedNameSpecifier::TypeSpec:
case NestedNameSpecifier::TypeSpecWithTemplate: {
const TagType *Tag = NNS->getAsType()->getAs<TagType>();
assert(Tag && "Non-tag type in nested-name-specifier");
return Tag->getDecl();
}
case NestedNameSpecifier::Global:
return Context.getTranslationUnitDecl();
case NestedNameSpecifier::Super:
return NNS->getAsRecordDecl();
}
llvm_unreachable("Invalid NestedNameSpecifier::Kind!");
}