mirrors/llvm-project
0
0
Fork 0
mirror of https://github.com/llvm/llvm-project.git synced 2025-04-28 14:56:07 +00:00
Code Issues Projects Releases Wiki Activity
llvm-project/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
Richard Smith 169f219001 Add a special-case diagnostic for one of the more obnoxious special cases of 
unscoped enumeration members: an enumerator name which is visible in the
out-of-class definition of a member of a templated class might not actually
exist in the instantiation of that class, if the enumeration is also lexically
defined outside the class definition and is explicitly specialized.

Depending on the result of a CWG discussion, we may have a different resolution
for a class of problems in this area, but this fixes the immediate issue of a
crash-on-invalid / accepts-invalid (depending on +Asserts). Thanks to Johannes
Schaub for digging into the standard wording to find how this case is currently
specified to behave.

llvm-svn: 153461
2012-03-26 20:28:16 +00:00

3401 lines
130 KiB
C++
Raw Blame History

//===--- SemaTemplateInstantiateDecl.cpp - C++ Template Decl Instantiation ===/
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//===----------------------------------------------------------------------===/
//
// This file implements C++ template instantiation for declarations.
//
//===----------------------------------------------------------------------===/
#include "clang/Sema/SemaInternal.h"
#include "clang/Sema/Lookup.h"
#include "clang/Sema/PrettyDeclStackTrace.h"
#include "clang/Sema/Template.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/DeclVisitor.h"
#include "clang/AST/DependentDiagnostic.h"
#include "clang/AST/Expr.h"
#include "clang/AST/ExprCXX.h"
#include "clang/AST/TypeLoc.h"
#include "clang/Lex/Preprocessor.h"
using namespace clang;
bool TemplateDeclInstantiator::SubstQualifier(const DeclaratorDecl *OldDecl,
DeclaratorDecl *NewDecl) {
if (!OldDecl->getQualifierLoc())
return false;
NestedNameSpecifierLoc NewQualifierLoc
= SemaRef.SubstNestedNameSpecifierLoc(OldDecl->getQualifierLoc(),
TemplateArgs);
if (!NewQualifierLoc)
return true;
NewDecl->setQualifierInfo(NewQualifierLoc);
return false;
}
bool TemplateDeclInstantiator::SubstQualifier(const TagDecl *OldDecl,
TagDecl *NewDecl) {
if (!OldDecl->getQualifierLoc())
return false;
NestedNameSpecifierLoc NewQualifierLoc
= SemaRef.SubstNestedNameSpecifierLoc(OldDecl->getQualifierLoc(),
TemplateArgs);
if (!NewQualifierLoc)
return true;
NewDecl->setQualifierInfo(NewQualifierLoc);
return false;
}
// Include attribute instantiation code.
#include "clang/Sema/AttrTemplateInstantiate.inc"
void Sema::InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs,
const Decl *Tmpl, Decl *New,
LateInstantiatedAttrVec *LateAttrs,
LocalInstantiationScope *OuterMostScope) {
for (AttrVec::const_iterator i = Tmpl->attr_begin(), e = Tmpl->attr_end();
i != e; ++i) {
const Attr *TmplAttr = *i;
// FIXME: This should be generalized to more than just the AlignedAttr.
if (const AlignedAttr *Aligned = dyn_cast<AlignedAttr>(TmplAttr)) {
if (Aligned->isAlignmentDependent()) {
if (Aligned->isAlignmentExpr()) {
// The alignment expression is a constant expression.
EnterExpressionEvaluationContext Unevaluated(*this,
Sema::ConstantEvaluated);
ExprResult Result = SubstExpr(Aligned->getAlignmentExpr(),
TemplateArgs);
if (!Result.isInvalid())
AddAlignedAttr(Aligned->getLocation(), New, Result.takeAs<Expr>());
} else {
TypeSourceInfo *Result = SubstType(Aligned->getAlignmentType(),
TemplateArgs,
Aligned->getLocation(),
DeclarationName());
if (Result)
AddAlignedAttr(Aligned->getLocation(), New, Result);
}
continue;
}
}
if (TmplAttr->isLateParsed() && LateAttrs) {
// Late parsed attributes must be instantiated and attached after the
// enclosing class has been instantiated. See Sema::InstantiateClass.
LocalInstantiationScope *Saved = 0;
if (CurrentInstantiationScope)
Saved = CurrentInstantiationScope->cloneScopes(OuterMostScope);
LateAttrs->push_back(LateInstantiatedAttribute(TmplAttr, Saved, New));
} else {
Attr *NewAttr = sema::instantiateTemplateAttribute(TmplAttr, Context,
*this, TemplateArgs);
New->addAttr(NewAttr);
}
}
}
Decl *
TemplateDeclInstantiator::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
llvm_unreachable("Translation units cannot be instantiated");
}
Decl *
TemplateDeclInstantiator::VisitLabelDecl(LabelDecl *D) {
LabelDecl *Inst = LabelDecl::Create(SemaRef.Context, Owner, D->getLocation(),
D->getIdentifier());
Owner->addDecl(Inst);
return Inst;
}
Decl *
TemplateDeclInstantiator::VisitNamespaceDecl(NamespaceDecl *D) {
llvm_unreachable("Namespaces cannot be instantiated");
}
Decl *
TemplateDeclInstantiator::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
NamespaceAliasDecl *Inst
= NamespaceAliasDecl::Create(SemaRef.Context, Owner,
D->getNamespaceLoc(),
D->getAliasLoc(),
D->getIdentifier(),
D->getQualifierLoc(),
D->getTargetNameLoc(),
D->getNamespace());
Owner->addDecl(Inst);
return Inst;
}
Decl *TemplateDeclInstantiator::InstantiateTypedefNameDecl(TypedefNameDecl *D,
bool IsTypeAlias) {
bool Invalid = false;
TypeSourceInfo *DI = D->getTypeSourceInfo();
if (DI->getType()->isInstantiationDependentType() ||
DI->getType()->isVariablyModifiedType()) {
DI = SemaRef.SubstType(DI, TemplateArgs,
D->getLocation(), D->getDeclName());
if (!DI) {
Invalid = true;
DI = SemaRef.Context.getTrivialTypeSourceInfo(SemaRef.Context.IntTy);
}
} else {
SemaRef.MarkDeclarationsReferencedInType(D->getLocation(), DI->getType());
}
// Create the new typedef
TypedefNameDecl *Typedef;
if (IsTypeAlias)
Typedef = TypeAliasDecl::Create(SemaRef.Context, Owner, D->getLocStart(),
D->getLocation(), D->getIdentifier(), DI);
else
Typedef = TypedefDecl::Create(SemaRef.Context, Owner, D->getLocStart(),
D->getLocation(), D->getIdentifier(), DI);
if (Invalid)
Typedef->setInvalidDecl();
// If the old typedef was the name for linkage purposes of an anonymous
// tag decl, re-establish that relationship for the new typedef.
if (const TagType *oldTagType = D->getUnderlyingType()->getAs<TagType>()) {
TagDecl *oldTag = oldTagType->getDecl();
if (oldTag->getTypedefNameForAnonDecl() == D) {
TagDecl *newTag = DI->getType()->castAs<TagType>()->getDecl();
assert(!newTag->getIdentifier() && !newTag->getTypedefNameForAnonDecl());
newTag->setTypedefNameForAnonDecl(Typedef);
}
}
if (TypedefNameDecl *Prev = D->getPreviousDecl()) {
NamedDecl *InstPrev = SemaRef.FindInstantiatedDecl(D->getLocation(), Prev,
TemplateArgs);
if (!InstPrev)
return 0;
TypedefNameDecl *InstPrevTypedef = cast<TypedefNameDecl>(InstPrev);
// If the typedef types are not identical, reject them.
SemaRef.isIncompatibleTypedef(InstPrevTypedef, Typedef);
Typedef->setPreviousDeclaration(InstPrevTypedef);
}
SemaRef.InstantiateAttrs(TemplateArgs, D, Typedef);
Typedef->setAccess(D->getAccess());
return Typedef;
}
Decl *TemplateDeclInstantiator::VisitTypedefDecl(TypedefDecl *D) {
Decl *Typedef = InstantiateTypedefNameDecl(D, /*IsTypeAlias=*/false);
Owner->addDecl(Typedef);
return Typedef;
}
Decl *TemplateDeclInstantiator::VisitTypeAliasDecl(TypeAliasDecl *D) {
Decl *Typedef = InstantiateTypedefNameDecl(D, /*IsTypeAlias=*/true);
Owner->addDecl(Typedef);
return Typedef;
}
Decl *
TemplateDeclInstantiator::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
// Create a local instantiation scope for this type alias template, which
// will contain the instantiations of the template parameters.
LocalInstantiationScope Scope(SemaRef);
TemplateParameterList *TempParams = D->getTemplateParameters();
TemplateParameterList *InstParams = SubstTemplateParams(TempParams);
if (!InstParams)
return 0;
TypeAliasDecl *Pattern = D->getTemplatedDecl();
TypeAliasTemplateDecl *PrevAliasTemplate = 0;
if (Pattern->getPreviousDecl()) {
DeclContext::lookup_result Found = Owner->lookup(Pattern->getDeclName());
if (Found.first != Found.second) {
PrevAliasTemplate = dyn_cast<TypeAliasTemplateDecl>(*Found.first);
}
}
TypeAliasDecl *AliasInst = cast_or_null<TypeAliasDecl>(
InstantiateTypedefNameDecl(Pattern, /*IsTypeAlias=*/true));
if (!AliasInst)
return 0;
TypeAliasTemplateDecl *Inst
= TypeAliasTemplateDecl::Create(SemaRef.Context, Owner, D->getLocation(),
D->getDeclName(), InstParams, AliasInst);
if (PrevAliasTemplate)
Inst->setPreviousDeclaration(PrevAliasTemplate);
Inst->setAccess(D->getAccess());
if (!PrevAliasTemplate)
Inst->setInstantiatedFromMemberTemplate(D);
Owner->addDecl(Inst);
return Inst;
}
Decl *TemplateDeclInstantiator::VisitVarDecl(VarDecl *D) {
// If this is the variable for an anonymous struct or union,
// instantiate the anonymous struct/union type first.
if (const RecordType *RecordTy = D->getType()->getAs<RecordType>())
if (RecordTy->getDecl()->isAnonymousStructOrUnion())
if (!VisitCXXRecordDecl(cast<CXXRecordDecl>(RecordTy->getDecl())))
return 0;
// Do substitution on the type of the declaration
TypeSourceInfo *DI = SemaRef.SubstType(D->getTypeSourceInfo(),
TemplateArgs,
D->getTypeSpecStartLoc(),
D->getDeclName());
if (!DI)
return 0;
if (DI->getType()->isFunctionType()) {
SemaRef.Diag(D->getLocation(), diag::err_variable_instantiates_to_function)
<< D->isStaticDataMember() << DI->getType();
return 0;
}
// Build the instantiated declaration
VarDecl *Var = VarDecl::Create(SemaRef.Context, Owner,
D->getInnerLocStart(),
D->getLocation(), D->getIdentifier(),
DI->getType(), DI,
D->getStorageClass(),
D->getStorageClassAsWritten());
Var->setThreadSpecified(D->isThreadSpecified());
Var->setInitStyle(D->getInitStyle());
Var->setCXXForRangeDecl(D->isCXXForRangeDecl());
Var->setConstexpr(D->isConstexpr());
// Substitute the nested name specifier, if any.
if (SubstQualifier(D, Var))
return 0;
// If we are instantiating a static data member defined
// out-of-line, the instantiation will have the same lexical
// context (which will be a namespace scope) as the template.
if (D->isOutOfLine())
Var->setLexicalDeclContext(D->getLexicalDeclContext());
Var->setAccess(D->getAccess());
if (!D->isStaticDataMember()) {
Var->setUsed(D->isUsed(false));
Var->setReferenced(D->isReferenced());
}
// FIXME: In theory, we could have a previous declaration for variables that
// are not static data members.
// FIXME: having to fake up a LookupResult is dumb.
LookupResult Previous(SemaRef, Var->getDeclName(), Var->getLocation(),
Sema::LookupOrdinaryName, Sema::ForRedeclaration);
if (D->isStaticDataMember())
SemaRef.LookupQualifiedName(Previous, Owner, false);
// In ARC, infer 'retaining' for variables of retainable type.
if (SemaRef.getLangOpts().ObjCAutoRefCount &&
SemaRef.inferObjCARCLifetime(Var))
Var->setInvalidDecl();
SemaRef.CheckVariableDeclaration(Var, Previous);
if (D->isOutOfLine()) {
D->getLexicalDeclContext()->addDecl(Var);
Owner->makeDeclVisibleInContext(Var);
} else {
Owner->addDecl(Var);
if (Owner->isFunctionOrMethod())
SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Var);
}
SemaRef.InstantiateAttrs(TemplateArgs, D, Var, LateAttrs, StartingScope);
// Link instantiations of static data members back to the template from
// which they were instantiated.
if (Var->isStaticDataMember())
SemaRef.Context.setInstantiatedFromStaticDataMember(Var, D,
TSK_ImplicitInstantiation);
if (Var->getAnyInitializer()) {
// We already have an initializer in the class.
} else if (D->getInit()) {
if (Var->isStaticDataMember() && !D->isOutOfLine())
SemaRef.PushExpressionEvaluationContext(Sema::ConstantEvaluated);
else
SemaRef.PushExpressionEvaluationContext(Sema::PotentiallyEvaluated);
// Instantiate the initializer.
ExprResult Init = SemaRef.SubstInitializer(D->getInit(), TemplateArgs,
D->getInitStyle() == VarDecl::CallInit);
if (!Init.isInvalid()) {
bool TypeMayContainAuto = true;
if (Init.get()) {
bool DirectInit = D->isDirectInit();
SemaRef.AddInitializerToDecl(Var, Init.take(), DirectInit,
TypeMayContainAuto);
} else
SemaRef.ActOnUninitializedDecl(Var, TypeMayContainAuto);
} else {
// FIXME: Not too happy about invalidating the declaration
// because of a bogus initializer.
Var->setInvalidDecl();
}
SemaRef.PopExpressionEvaluationContext();
} else if ((!Var->isStaticDataMember() || Var->isOutOfLine()) &&
!Var->isCXXForRangeDecl())
SemaRef.ActOnUninitializedDecl(Var, false);
// Diagnose unused local variables with dependent types, where the diagnostic
// will have been deferred.
if (!Var->isInvalidDecl() && Owner->isFunctionOrMethod() && !Var->isUsed() &&
D->getType()->isDependentType())
SemaRef.DiagnoseUnusedDecl(Var);
return Var;
}
Decl *TemplateDeclInstantiator::VisitAccessSpecDecl(AccessSpecDecl *D) {
AccessSpecDecl* AD
= AccessSpecDecl::Create(SemaRef.Context, D->getAccess(), Owner,
D->getAccessSpecifierLoc(), D->getColonLoc());
Owner->addHiddenDecl(AD);
return AD;
}
Decl *TemplateDeclInstantiator::VisitFieldDecl(FieldDecl *D) {
bool Invalid = false;
TypeSourceInfo *DI = D->getTypeSourceInfo();
if (DI->getType()->isInstantiationDependentType() ||
DI->getType()->isVariablyModifiedType()) {
DI = SemaRef.SubstType(DI, TemplateArgs,
D->getLocation(), D->getDeclName());
if (!DI) {
DI = D->getTypeSourceInfo();
Invalid = true;
} else if (DI->getType()->isFunctionType()) {
// C++ [temp.arg.type]p3:
// If a declaration acquires a function type through a type
// dependent on a template-parameter and this causes a
// declaration that does not use the syntactic form of a
// function declarator to have function type, the program is
// ill-formed.
SemaRef.Diag(D->getLocation(), diag::err_field_instantiates_to_function)
<< DI->getType();
Invalid = true;
}
} else {
SemaRef.MarkDeclarationsReferencedInType(D->getLocation(), DI->getType());
}
Expr *BitWidth = D->getBitWidth();
if (Invalid)
BitWidth = 0;
else if (BitWidth) {
// The bit-width expression is a constant expression.
EnterExpressionEvaluationContext Unevaluated(SemaRef,
Sema::ConstantEvaluated);
ExprResult InstantiatedBitWidth
= SemaRef.SubstExpr(BitWidth, TemplateArgs);
if (InstantiatedBitWidth.isInvalid()) {
Invalid = true;
BitWidth = 0;
} else
BitWidth = InstantiatedBitWidth.takeAs<Expr>();
}
FieldDecl *Field = SemaRef.CheckFieldDecl(D->getDeclName(),
DI->getType(), DI,
cast<RecordDecl>(Owner),
D->getLocation(),
D->isMutable(),
BitWidth,
D->hasInClassInitializer(),
D->getTypeSpecStartLoc(),
D->getAccess(),
0);
if (!Field) {
cast<Decl>(Owner)->setInvalidDecl();
return 0;
}
SemaRef.InstantiateAttrs(TemplateArgs, D, Field, LateAttrs, StartingScope);
if (Invalid)
Field->setInvalidDecl();
if (!Field->getDeclName()) {
// Keep track of where this decl came from.
SemaRef.Context.setInstantiatedFromUnnamedFieldDecl(Field, D);
}
if (CXXRecordDecl *Parent= dyn_cast<CXXRecordDecl>(Field->getDeclContext())) {
if (Parent->isAnonymousStructOrUnion() &&
Parent->getRedeclContext()->isFunctionOrMethod())
SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Field);
}
Field->setImplicit(D->isImplicit());
Field->setAccess(D->getAccess());
Owner->addDecl(Field);
return Field;
}
Decl *TemplateDeclInstantiator::VisitIndirectFieldDecl(IndirectFieldDecl *D) {
NamedDecl **NamedChain =
new (SemaRef.Context)NamedDecl*[D->getChainingSize()];
int i = 0;
for (IndirectFieldDecl::chain_iterator PI =
D->chain_begin(), PE = D->chain_end();
PI != PE; ++PI) {
NamedDecl *Next = SemaRef.FindInstantiatedDecl(D->getLocation(), *PI,
TemplateArgs);
if (!Next)
return 0;
NamedChain[i++] = Next;
}
QualType T = cast<FieldDecl>(NamedChain[i-1])->getType();
IndirectFieldDecl* IndirectField
= IndirectFieldDecl::Create(SemaRef.Context, Owner, D->getLocation(),
D->getIdentifier(), T,
NamedChain, D->getChainingSize());
IndirectField->setImplicit(D->isImplicit());
IndirectField->setAccess(D->getAccess());
Owner->addDecl(IndirectField);
return IndirectField;
}
Decl *TemplateDeclInstantiator::VisitFriendDecl(FriendDecl *D) {
// Handle friend type expressions by simply substituting template
// parameters into the pattern type and checking the result.
if (TypeSourceInfo *Ty = D->getFriendType()) {
TypeSourceInfo *InstTy;
// If this is an unsupported friend, don't bother substituting template
// arguments into it. The actual type referred to won't be used by any
// parts of Clang, and may not be valid for instantiating. Just use the
// same info for the instantiated friend.
if (D->isUnsupportedFriend()) {
InstTy = Ty;
} else {
InstTy = SemaRef.SubstType(Ty, TemplateArgs,
D->getLocation(), DeclarationName());
}
if (!InstTy)
return 0;
FriendDecl *FD = SemaRef.CheckFriendTypeDecl(D->getLocation(),
D->getFriendLoc(), InstTy);
if (!FD)
return 0;
FD->setAccess(AS_public);
FD->setUnsupportedFriend(D->isUnsupportedFriend());
Owner->addDecl(FD);
return FD;
}
NamedDecl *ND = D->getFriendDecl();
assert(ND && "friend decl must be a decl or a type!");
// All of the Visit implementations for the various potential friend
// declarations have to be carefully written to work for friend
// objects, with the most important detail being that the target
// decl should almost certainly not be placed in Owner.
Decl *NewND = Visit(ND);
if (!NewND) return 0;
FriendDecl *FD =
FriendDecl::Create(SemaRef.Context, Owner, D->getLocation(),
cast<NamedDecl>(NewND), D->getFriendLoc());
FD->setAccess(AS_public);
FD->setUnsupportedFriend(D->isUnsupportedFriend());
Owner->addDecl(FD);
return FD;
}
Decl *TemplateDeclInstantiator::VisitStaticAssertDecl(StaticAssertDecl *D) {
Expr *AssertExpr = D->getAssertExpr();
// The expression in a static assertion is a constant expression.
EnterExpressionEvaluationContext Unevaluated(SemaRef,
Sema::ConstantEvaluated);
ExprResult InstantiatedAssertExpr
= SemaRef.SubstExpr(AssertExpr, TemplateArgs);
if (InstantiatedAssertExpr.isInvalid())
return 0;
ExprResult Message(D->getMessage());
D->getMessage();
return SemaRef.ActOnStaticAssertDeclaration(D->getLocation(),
InstantiatedAssertExpr.get(),
Message.get(),
D->getRParenLoc());
}
Decl *TemplateDeclInstantiator::VisitEnumDecl(EnumDecl *D) {
EnumDecl *PrevDecl = 0;
if (D->getPreviousDecl()) {
NamedDecl *Prev = SemaRef.FindInstantiatedDecl(D->getLocation(),
D->getPreviousDecl(),
TemplateArgs);
if (!Prev) return 0;
PrevDecl = cast<EnumDecl>(Prev);
}
EnumDecl *Enum = EnumDecl::Create(SemaRef.Context, Owner, D->getLocStart(),
D->getLocation(), D->getIdentifier(),
PrevDecl, D->isScoped(),
D->isScopedUsingClassTag(), D->isFixed());
if (D->isFixed()) {
if (TypeSourceInfo *TI = D->getIntegerTypeSourceInfo()) {
// If we have type source information for the underlying type, it means it
// has been explicitly set by the user. Perform substitution on it before
// moving on.
SourceLocation UnderlyingLoc = TI->getTypeLoc().getBeginLoc();
TypeSourceInfo *NewTI = SemaRef.SubstType(TI, TemplateArgs, UnderlyingLoc,
DeclarationName());
if (!NewTI || SemaRef.CheckEnumUnderlyingType(NewTI))
Enum->setIntegerType(SemaRef.Context.IntTy);
else
Enum->setIntegerTypeSourceInfo(NewTI);
} else {
assert(!D->getIntegerType()->isDependentType()
&& "Dependent type without type source info");
Enum->setIntegerType(D->getIntegerType());
}
}
SemaRef.InstantiateAttrs(TemplateArgs, D, Enum);
Enum->setInstantiationOfMemberEnum(D, TSK_ImplicitInstantiation);
Enum->setAccess(D->getAccess());
if (SubstQualifier(D, Enum)) return 0;
Owner->addDecl(Enum);
EnumDecl *Def = D->getDefinition();
if (Def && Def != D) {
// If this is an out-of-line definition of an enum member template, check
// that the underlying types match in the instantiation of both
// declarations.
if (TypeSourceInfo *TI = Def->getIntegerTypeSourceInfo()) {
SourceLocation UnderlyingLoc = TI->getTypeLoc().getBeginLoc();
QualType DefnUnderlying =
SemaRef.SubstType(TI->getType(), TemplateArgs,
UnderlyingLoc, DeclarationName());
SemaRef.CheckEnumRedeclaration(Def->getLocation(), Def->isScoped(),
DefnUnderlying, Enum);
}
}
if (D->getDeclContext()->isFunctionOrMethod())
SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Enum);
// C++11 [temp.inst]p1: The implicit instantiation of a class template
// specialization causes the implicit instantiation of the declarations, but
// not the definitions of scoped member enumerations.
// FIXME: There appears to be no wording for what happens for an enum defined
// within a block scope, but we treat that much like a member template. Only
// instantiate the definition when visiting the definition in that case, since
// we will visit all redeclarations.
if (!Enum->isScoped() && Def &&
(!D->getDeclContext()->isFunctionOrMethod() || D->isCompleteDefinition()))
InstantiateEnumDefinition(Enum, Def);
return Enum;
}
void TemplateDeclInstantiator::InstantiateEnumDefinition(
EnumDecl *Enum, EnumDecl *Pattern) {
Enum->startDefinition();
// Update the location to refer to the definition.
Enum->setLocation(Pattern->getLocation());
SmallVector<Decl*, 4> Enumerators;
EnumConstantDecl *LastEnumConst = 0;
for (EnumDecl::enumerator_iterator EC = Pattern->enumerator_begin(),
ECEnd = Pattern->enumerator_end();
EC != ECEnd; ++EC) {
// The specified value for the enumerator.
ExprResult Value = SemaRef.Owned((Expr *)0);
if (Expr *UninstValue = EC->getInitExpr()) {
// The enumerator's value expression is a constant expression.
EnterExpressionEvaluationContext Unevaluated(SemaRef,
Sema::ConstantEvaluated);
Value = SemaRef.SubstExpr(UninstValue, TemplateArgs);
}
// Drop the initial value and continue.
bool isInvalid = false;
if (Value.isInvalid()) {
Value = SemaRef.Owned((Expr *)0);
isInvalid = true;
}
EnumConstantDecl *EnumConst
= SemaRef.CheckEnumConstant(Enum, LastEnumConst,
EC->getLocation(), EC->getIdentifier(),
Value.get());
if (isInvalid) {
if (EnumConst)
EnumConst->setInvalidDecl();
Enum->setInvalidDecl();
}
if (EnumConst) {
SemaRef.InstantiateAttrs(TemplateArgs, *EC, EnumConst);
EnumConst->setAccess(Enum->getAccess());
Enum->addDecl(EnumConst);
Enumerators.push_back(EnumConst);
LastEnumConst = EnumConst;
if (Pattern->getDeclContext()->isFunctionOrMethod() &&
!Enum->isScoped()) {
// If the enumeration is within a function or method, record the enum
// constant as a local.
SemaRef.CurrentInstantiationScope->InstantiatedLocal(*EC, EnumConst);
}
}
}
// FIXME: Fixup LBraceLoc
SemaRef.ActOnEnumBody(Enum->getLocation(), SourceLocation(),
Enum->getRBraceLoc(), Enum,
Enumerators.data(), Enumerators.size(),
0, 0);
}
Decl *TemplateDeclInstantiator::VisitEnumConstantDecl(EnumConstantDecl *D) {
llvm_unreachable("EnumConstantDecls can only occur within EnumDecls.");
}
Decl *TemplateDeclInstantiator::VisitClassTemplateDecl(ClassTemplateDecl *D) {
bool isFriend = (D->getFriendObjectKind() != Decl::FOK_None);
// Create a local instantiation scope for this class template, which
// will contain the instantiations of the template parameters.
LocalInstantiationScope Scope(SemaRef);
TemplateParameterList *TempParams = D->getTemplateParameters();
TemplateParameterList *InstParams = SubstTemplateParams(TempParams);
if (!InstParams)
return NULL;
CXXRecordDecl *Pattern = D->getTemplatedDecl();
// Instantiate the qualifier. We have to do this first in case
// we're a friend declaration, because if we are then we need to put
// the new declaration in the appropriate context.
NestedNameSpecifierLoc QualifierLoc = Pattern->getQualifierLoc();
if (QualifierLoc) {
QualifierLoc = SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc,
TemplateArgs);
if (!QualifierLoc)
return 0;
}
CXXRecordDecl *PrevDecl = 0;
ClassTemplateDecl *PrevClassTemplate = 0;
if (!isFriend && Pattern->getPreviousDecl()) {
DeclContext::lookup_result Found = Owner->lookup(Pattern->getDeclName());
if (Found.first != Found.second) {
PrevClassTemplate = dyn_cast<ClassTemplateDecl>(*Found.first);
if (PrevClassTemplate)
PrevDecl = PrevClassTemplate->getTemplatedDecl();
}
}
// If this isn't a friend, then it's a member template, in which
// case we just want to build the instantiation in the
// specialization. If it is a friend, we want to build it in
// the appropriate context.
DeclContext *DC = Owner;
if (isFriend) {
if (QualifierLoc) {
CXXScopeSpec SS;
SS.Adopt(QualifierLoc);
DC = SemaRef.computeDeclContext(SS);
if (!DC) return 0;
} else {
DC = SemaRef.FindInstantiatedContext(Pattern->getLocation(),
Pattern->getDeclContext(),
TemplateArgs);
}
// Look for a previous declaration of the template in the owning
// context.
LookupResult R(SemaRef, Pattern->getDeclName(), Pattern->getLocation(),
Sema::LookupOrdinaryName, Sema::ForRedeclaration);
SemaRef.LookupQualifiedName(R, DC);
if (R.isSingleResult()) {
PrevClassTemplate = R.getAsSingle<ClassTemplateDecl>();
if (PrevClassTemplate)
PrevDecl = PrevClassTemplate->getTemplatedDecl();
}
if (!PrevClassTemplate && QualifierLoc) {
SemaRef.Diag(Pattern->getLocation(), diag::err_not_tag_in_scope)
<< D->getTemplatedDecl()->getTagKind() << Pattern->getDeclName() << DC
<< QualifierLoc.getSourceRange();
return 0;
}
bool AdoptedPreviousTemplateParams = false;
if (PrevClassTemplate) {
bool Complain = true;
// HACK: libstdc++ 4.2.1 contains an ill-formed friend class
// template for struct std::tr1::__detail::_Map_base, where the
// template parameters of the friend declaration don't match the
// template parameters of the original declaration. In this one
// case, we don't complain about the ill-formed friend
// declaration.
if (isFriend && Pattern->getIdentifier() &&
Pattern->getIdentifier()->isStr("_Map_base") &&
DC->isNamespace() &&
cast<NamespaceDecl>(DC)->getIdentifier() &&
cast<NamespaceDecl>(DC)->getIdentifier()->isStr("__detail")) {
DeclContext *DCParent = DC->getParent();
if (DCParent->isNamespace() &&
cast<NamespaceDecl>(DCParent)->getIdentifier() &&
cast<NamespaceDecl>(DCParent)->getIdentifier()->isStr("tr1")) {
DeclContext *DCParent2 = DCParent->getParent();
if (DCParent2->isNamespace() &&
cast<NamespaceDecl>(DCParent2)->getIdentifier() &&
cast<NamespaceDecl>(DCParent2)->getIdentifier()->isStr("std") &&
DCParent2->getParent()->isTranslationUnit())
Complain = false;
}
}
TemplateParameterList *PrevParams
= PrevClassTemplate->getTemplateParameters();
// Make sure the parameter lists match.
if (!SemaRef.TemplateParameterListsAreEqual(InstParams, PrevParams,
Complain,
Sema::TPL_TemplateMatch)) {
if (Complain)
return 0;
AdoptedPreviousTemplateParams = true;
InstParams = PrevParams;
}
// Do some additional validation, then merge default arguments
// from the existing declarations.
if (!AdoptedPreviousTemplateParams &&
SemaRef.CheckTemplateParameterList(InstParams, PrevParams,
Sema::TPC_ClassTemplate))
return 0;
}
}
CXXRecordDecl *RecordInst
= CXXRecordDecl::Create(SemaRef.Context, Pattern->getTagKind(), DC,
Pattern->getLocStart(), Pattern->getLocation(),
Pattern->getIdentifier(), PrevDecl,
/*DelayTypeCreation=*/true);
if (QualifierLoc)
RecordInst->setQualifierInfo(QualifierLoc);
ClassTemplateDecl *Inst
= ClassTemplateDecl::Create(SemaRef.Context, DC, D->getLocation(),
D->getIdentifier(), InstParams, RecordInst,
PrevClassTemplate);
RecordInst->setDescribedClassTemplate(Inst);
if (isFriend) {
if (PrevClassTemplate)
Inst->setAccess(PrevClassTemplate->getAccess());
else
Inst->setAccess(D->getAccess());
Inst->setObjectOfFriendDecl(PrevClassTemplate != 0);
// TODO: do we want to track the instantiation progeny of this
// friend target decl?
} else {
Inst->setAccess(D->getAccess());
if (!PrevClassTemplate)
Inst->setInstantiatedFromMemberTemplate(D);
}
// Trigger creation of the type for the instantiation.
SemaRef.Context.getInjectedClassNameType(RecordInst,
Inst->getInjectedClassNameSpecialization());
// Finish handling of friends.
if (isFriend) {
DC->makeDeclVisibleInContext(Inst);
Inst->setLexicalDeclContext(Owner);
RecordInst->setLexicalDeclContext(Owner);
return Inst;
}
if (D->isOutOfLine()) {
Inst->setLexicalDeclContext(D->getLexicalDeclContext());
RecordInst->setLexicalDeclContext(D->getLexicalDeclContext());
}
Owner->addDecl(Inst);
if (!PrevClassTemplate) {
// Queue up any out-of-line partial specializations of this member
// class template; the client will force their instantiation once
// the enclosing class has been instantiated.
SmallVector<ClassTemplatePartialSpecializationDecl *, 4> PartialSpecs;
D->getPartialSpecializations(PartialSpecs);
for (unsigned I = 0, N = PartialSpecs.size(); I != N; ++I)
if (PartialSpecs[I]->isOutOfLine())
OutOfLinePartialSpecs.push_back(std::make_pair(Inst, PartialSpecs[I]));
}
return Inst;
}
Decl *
TemplateDeclInstantiator::VisitClassTemplatePartialSpecializationDecl(
ClassTemplatePartialSpecializationDecl *D) {
ClassTemplateDecl *ClassTemplate = D->getSpecializedTemplate();
// Lookup the already-instantiated declaration in the instantiation
// of the class template and return that.
DeclContext::lookup_result Found
= Owner->lookup(ClassTemplate->getDeclName());
if (Found.first == Found.second)
return 0;
ClassTemplateDecl *InstClassTemplate
= dyn_cast<ClassTemplateDecl>(*Found.first);
if (!InstClassTemplate)
return 0;
if (ClassTemplatePartialSpecializationDecl *Result
= InstClassTemplate->findPartialSpecInstantiatedFromMember(D))
return Result;
return InstantiateClassTemplatePartialSpecialization(InstClassTemplate, D);
}
Decl *
TemplateDeclInstantiator::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
// Create a local instantiation scope for this function template, which
// will contain the instantiations of the template parameters and then get
// merged with the local instantiation scope for the function template
// itself.
LocalInstantiationScope Scope(SemaRef);
TemplateParameterList *TempParams = D->getTemplateParameters();
TemplateParameterList *InstParams = SubstTemplateParams(TempParams);
if (!InstParams)
return NULL;
FunctionDecl *Instantiated = 0;
if (CXXMethodDecl *DMethod = dyn_cast<CXXMethodDecl>(D->getTemplatedDecl()))
Instantiated = cast_or_null<FunctionDecl>(VisitCXXMethodDecl(DMethod,
InstParams));
else
Instantiated = cast_or_null<FunctionDecl>(VisitFunctionDecl(
D->getTemplatedDecl(),
InstParams));
if (!Instantiated)
return 0;
Instantiated->setAccess(D->getAccess());
// Link the instantiated function template declaration to the function
// template from which it was instantiated.
FunctionTemplateDecl *InstTemplate
= Instantiated->getDescribedFunctionTemplate();
InstTemplate->setAccess(D->getAccess());
assert(InstTemplate &&
"VisitFunctionDecl/CXXMethodDecl didn't create a template!");
bool isFriend = (InstTemplate->getFriendObjectKind() != Decl::FOK_None);
// Link the instantiation back to the pattern *unless* this is a
// non-definition friend declaration.
if (!InstTemplate->getInstantiatedFromMemberTemplate() &&
!(isFriend && !D->getTemplatedDecl()->isThisDeclarationADefinition()))
InstTemplate->setInstantiatedFromMemberTemplate(D);
// Make declarations visible in the appropriate context.
if (!isFriend)
Owner->addDecl(InstTemplate);
return InstTemplate;
}
Decl *TemplateDeclInstantiator::VisitCXXRecordDecl(CXXRecordDecl *D) {
CXXRecordDecl *PrevDecl = 0;
if (D->isInjectedClassName())
PrevDecl = cast<CXXRecordDecl>(Owner);
else if (D->getPreviousDecl()) {
NamedDecl *Prev = SemaRef.FindInstantiatedDecl(D->getLocation(),
D->getPreviousDecl(),
TemplateArgs);
if (!Prev) return 0;
PrevDecl = cast<CXXRecordDecl>(Prev);
}
CXXRecordDecl *Record
= CXXRecordDecl::Create(SemaRef.Context, D->getTagKind(), Owner,
D->getLocStart(), D->getLocation(),
D->getIdentifier(), PrevDecl);
// Substitute the nested name specifier, if any.
if (SubstQualifier(D, Record))
return 0;
Record->setImplicit(D->isImplicit());
// FIXME: Check against AS_none is an ugly hack to work around the issue that
// the tag decls introduced by friend class declarations don't have an access
// specifier. Remove once this area of the code gets sorted out.
if (D->getAccess() != AS_none)
Record->setAccess(D->getAccess());
if (!D->isInjectedClassName())
Record->setInstantiationOfMemberClass(D, TSK_ImplicitInstantiation);
// If the original function was part of a friend declaration,
// inherit its namespace state.
if (Decl::FriendObjectKind FOK = D->getFriendObjectKind())
Record->setObjectOfFriendDecl(FOK == Decl::FOK_Declared);
// Make sure that anonymous structs and unions are recorded.
if (D->isAnonymousStructOrUnion()) {
Record->setAnonymousStructOrUnion(true);
if (Record->getDeclContext()->getRedeclContext()->isFunctionOrMethod())
SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Record);
}
Owner->addDecl(Record);
return Record;
}
/// Normal class members are of more specific types and therefore
/// don't make it here. This function serves two purposes:
/// 1) instantiating function templates
/// 2) substituting friend declarations
/// FIXME: preserve function definitions in case #2
Decl *TemplateDeclInstantiator::VisitFunctionDecl(FunctionDecl *D,
TemplateParameterList *TemplateParams) {
// Check whether there is already a function template specialization for
// this declaration.
FunctionTemplateDecl *FunctionTemplate = D->getDescribedFunctionTemplate();
void *InsertPos = 0;
if (FunctionTemplate && !TemplateParams) {
std::pair<const TemplateArgument *, unsigned> Innermost
= TemplateArgs.getInnermost();
FunctionDecl *SpecFunc
= FunctionTemplate->findSpecialization(Innermost.first, Innermost.second,
InsertPos);
// If we already have a function template specialization, return it.
if (SpecFunc)
return SpecFunc;
}
bool isFriend;
if (FunctionTemplate)
isFriend = (FunctionTemplate->getFriendObjectKind() != Decl::FOK_None);
else
isFriend = (D->getFriendObjectKind() != Decl::FOK_None);
bool MergeWithParentScope = (TemplateParams != 0) ||
Owner->isFunctionOrMethod() ||
!(isa<Decl>(Owner) &&
cast<Decl>(Owner)->isDefinedOutsideFunctionOrMethod());
LocalInstantiationScope Scope(SemaRef, MergeWithParentScope);
SmallVector<ParmVarDecl *, 4> Params;
TypeSourceInfo *TInfo = SubstFunctionType(D, Params);
if (!TInfo)
return 0;
QualType T = TInfo->getType();
NestedNameSpecifierLoc QualifierLoc = D->getQualifierLoc();
if (QualifierLoc) {
QualifierLoc = SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc,
TemplateArgs);
if (!QualifierLoc)
return 0;
}
// If we're instantiating a local function declaration, put the result
// in the owner; otherwise we need to find the instantiated context.
DeclContext *DC;
if (D->getDeclContext()->isFunctionOrMethod())
DC = Owner;
else if (isFriend && QualifierLoc) {
CXXScopeSpec SS;
SS.Adopt(QualifierLoc);
DC = SemaRef.computeDeclContext(SS);
if (!DC) return 0;
} else {
DC = SemaRef.FindInstantiatedContext(D->getLocation(), D->getDeclContext(),
TemplateArgs);
}
FunctionDecl *Function =
FunctionDecl::Create(SemaRef.Context, DC, D->getInnerLocStart(),
D->getLocation(), D->getDeclName(), T, TInfo,
D->getStorageClass(), D->getStorageClassAsWritten(),
D->isInlineSpecified(), D->hasWrittenPrototype(),
D->isConstexpr());
if (QualifierLoc)
Function->setQualifierInfo(QualifierLoc);
DeclContext *LexicalDC = Owner;
if (!isFriend && D->isOutOfLine()) {
assert(D->getDeclContext()->isFileContext());
LexicalDC = D->getDeclContext();
}
Function->setLexicalDeclContext(LexicalDC);
// Attach the parameters
if (isa<FunctionProtoType>(Function->getType().IgnoreParens())) {
// Adopt the already-instantiated parameters into our own context.
for (unsigned P = 0; P < Params.size(); ++P)
if (Params[P])
Params[P]->setOwningFunction(Function);
} else {
// Since we were instantiated via a typedef of a function type, create
// new parameters.
const FunctionProtoType *Proto
= Function->getType()->getAs<FunctionProtoType>();
assert(Proto && "No function prototype in template instantiation?");
for (FunctionProtoType::arg_type_iterator AI = Proto->arg_type_begin(),
AE = Proto->arg_type_end(); AI != AE; ++AI) {
ParmVarDecl *Param
= SemaRef.BuildParmVarDeclForTypedef(Function, Function->getLocation(),
*AI);
Param->setScopeInfo(0, Params.size());
Params.push_back(Param);
}
}
Function->setParams(Params);
SourceLocation InstantiateAtPOI;
if (TemplateParams) {
// Our resulting instantiation is actually a function template, since we
// are substituting only the outer template parameters. For example, given
//
// template<typename T>
// struct X {
// template<typename U> friend void f(T, U);
// };
//
// X<int> x;
//
// We are instantiating the friend function template "f" within X<int>,
// which means substituting int for T, but leaving "f" as a friend function
// template.
// Build the function template itself.
FunctionTemplate = FunctionTemplateDecl::Create(SemaRef.Context, DC,
Function->getLocation(),
Function->getDeclName(),
TemplateParams, Function);
Function->setDescribedFunctionTemplate(FunctionTemplate);
FunctionTemplate->setLexicalDeclContext(LexicalDC);
if (isFriend && D->isThisDeclarationADefinition()) {
// TODO: should we remember this connection regardless of whether
// the friend declaration provided a body?
FunctionTemplate->setInstantiatedFromMemberTemplate(
D->getDescribedFunctionTemplate());
}
} else if (FunctionTemplate) {
// Record this function template specialization.
std::pair<const TemplateArgument *, unsigned> Innermost
= TemplateArgs.getInnermost();
Function->setFunctionTemplateSpecialization(FunctionTemplate,
TemplateArgumentList::CreateCopy(SemaRef.Context,
Innermost.first,
Innermost.second),
InsertPos);
} else if (isFriend) {
// Note, we need this connection even if the friend doesn't have a body.
// Its body may exist but not have been attached yet due to deferred
// parsing.
// FIXME: It might be cleaner to set this when attaching the body to the
// friend function declaration, however that would require finding all the
// instantiations and modifying them.
Function->setInstantiationOfMemberFunction(D, TSK_ImplicitInstantiation);
}
if (InitFunctionInstantiation(Function, D))
Function->setInvalidDecl();
bool isExplicitSpecialization = false;
LookupResult Previous(SemaRef, Function->getDeclName(), SourceLocation(),
Sema::LookupOrdinaryName, Sema::ForRedeclaration);
if (DependentFunctionTemplateSpecializationInfo *Info
= D->getDependentSpecializationInfo()) {
assert(isFriend && "non-friend has dependent specialization info?");
// This needs to be set now for future sanity.
Function->setObjectOfFriendDecl(/*HasPrevious*/ true);
// Instantiate the explicit template arguments.
TemplateArgumentListInfo ExplicitArgs(Info->getLAngleLoc(),
Info->getRAngleLoc());
if (SemaRef.Subst(Info->getTemplateArgs(), Info->getNumTemplateArgs(),
ExplicitArgs, TemplateArgs))
return 0;
// Map the candidate templates to their instantiations.
for (unsigned I = 0, E = Info->getNumTemplates(); I != E; ++I) {
Decl *Temp = SemaRef.FindInstantiatedDecl(D->getLocation(),
Info->getTemplate(I),
TemplateArgs);
if (!Temp) return 0;
Previous.addDecl(cast<FunctionTemplateDecl>(Temp));
}
if (SemaRef.CheckFunctionTemplateSpecialization(Function,
&ExplicitArgs,
Previous))
Function->setInvalidDecl();
isExplicitSpecialization = true;
} else if (TemplateParams || !FunctionTemplate) {
// Look only into the namespace where the friend would be declared to
// find a previous declaration. This is the innermost enclosing namespace,
// as described in ActOnFriendFunctionDecl.
SemaRef.LookupQualifiedName(Previous, DC);
// In C++, the previous declaration we find might be a tag type
// (class or enum). In this case, the new declaration will hide the
// tag type. Note that this does does not apply if we're declaring a
// typedef (C++ [dcl.typedef]p4).
if (Previous.isSingleTagDecl())
Previous.clear();
}
SemaRef.CheckFunctionDeclaration(/*Scope*/ 0, Function, Previous,
isExplicitSpecialization);
NamedDecl *PrincipalDecl = (TemplateParams
? cast<NamedDecl>(FunctionTemplate)
: Function);
// If the original function was part of a friend declaration,
// inherit its namespace state and add it to the owner.
if (isFriend) {
NamedDecl *PrevDecl;
if (TemplateParams)
PrevDecl = FunctionTemplate->getPreviousDecl();
else
PrevDecl = Function->getPreviousDecl();
PrincipalDecl->setObjectOfFriendDecl(PrevDecl != 0);
DC->makeDeclVisibleInContext(PrincipalDecl);
bool queuedInstantiation = false;
// C++98 [temp.friend]p5: When a function is defined in a friend function
// declaration in a class template, the function is defined at each
// instantiation of the class template. The function is defined even if it
// is never used.
// C++11 [temp.friend]p4: When a function is defined in a friend function
// declaration in a class template, the function is instantiated when the
// function is odr-used.
//
// If -Wc++98-compat is enabled, we go through the motions of checking for a
// redefinition, but don't instantiate the function.
if ((!SemaRef.getLangOpts().CPlusPlus0x ||
SemaRef.Diags.getDiagnosticLevel(
diag::warn_cxx98_compat_friend_redefinition,
Function->getLocation())
!= DiagnosticsEngine::Ignored) &&
D->isThisDeclarationADefinition()) {
// Check for a function body.
const FunctionDecl *Definition = 0;
if (Function->isDefined(Definition) &&
Definition->getTemplateSpecializationKind() == TSK_Undeclared) {
SemaRef.Diag(Function->getLocation(),
SemaRef.getLangOpts().CPlusPlus0x ?
diag::warn_cxx98_compat_friend_redefinition :
diag::err_redefinition) << Function->getDeclName();
SemaRef.Diag(Definition->getLocation(), diag::note_previous_definition);
if (!SemaRef.getLangOpts().CPlusPlus0x)
Function->setInvalidDecl();
}
// Check for redefinitions due to other instantiations of this or
// a similar friend function.
else for (FunctionDecl::redecl_iterator R = Function->redecls_begin(),
REnd = Function->redecls_end();
R != REnd; ++R) {
if (*R == Function)
continue;
switch (R->getFriendObjectKind()) {
case Decl::FOK_None:
if (!SemaRef.getLangOpts().CPlusPlus0x &&
!queuedInstantiation && R->isUsed(false)) {
if (MemberSpecializationInfo *MSInfo
= Function->getMemberSpecializationInfo()) {
if (MSInfo->getPointOfInstantiation().isInvalid()) {
SourceLocation Loc = R->getLocation(); // FIXME
MSInfo->setPointOfInstantiation(Loc);
SemaRef.PendingLocalImplicitInstantiations.push_back(
std::make_pair(Function, Loc));
queuedInstantiation = true;
}
}
}
break;
default:
if (const FunctionDecl *RPattern
= R->getTemplateInstantiationPattern())
if (RPattern->isDefined(RPattern)) {
SemaRef.Diag(Function->getLocation(),
SemaRef.getLangOpts().CPlusPlus0x ?
diag::warn_cxx98_compat_friend_redefinition :
diag::err_redefinition)
<< Function->getDeclName();
SemaRef.Diag(R->getLocation(), diag::note_previous_definition);
if (!SemaRef.getLangOpts().CPlusPlus0x)
Function->setInvalidDecl();
break;
}
}
}
}
}
if (Function->isOverloadedOperator() && !DC->isRecord() &&
PrincipalDecl->isInIdentifierNamespace(Decl::IDNS_Ordinary))
PrincipalDecl->setNonMemberOperator();
assert(!D->isDefaulted() && "only methods should be defaulted");
return Function;
}
Decl *
TemplateDeclInstantiator::VisitCXXMethodDecl(CXXMethodDecl *D,
TemplateParameterList *TemplateParams,
bool IsClassScopeSpecialization) {
FunctionTemplateDecl *FunctionTemplate = D->getDescribedFunctionTemplate();
void *InsertPos = 0;
if (FunctionTemplate && !TemplateParams) {
// We are creating a function template specialization from a function
// template. Check whether there is already a function template
// specialization for this particular set of template arguments.
std::pair<const TemplateArgument *, unsigned> Innermost
= TemplateArgs.getInnermost();
FunctionDecl *SpecFunc
= FunctionTemplate->findSpecialization(Innermost.first, Innermost.second,
InsertPos);
// If we already have a function template specialization, return it.
if (SpecFunc)
return SpecFunc;
}
bool isFriend;
if (FunctionTemplate)
isFriend = (FunctionTemplate->getFriendObjectKind() != Decl::FOK_None);
else
isFriend = (D->getFriendObjectKind() != Decl::FOK_None);
bool MergeWithParentScope = (TemplateParams != 0) ||
!(isa<Decl>(Owner) &&
cast<Decl>(Owner)->isDefinedOutsideFunctionOrMethod());
LocalInstantiationScope Scope(SemaRef, MergeWithParentScope);
// Instantiate enclosing template arguments for friends.
SmallVector<TemplateParameterList *, 4> TempParamLists;
unsigned NumTempParamLists = 0;
if (isFriend && (NumTempParamLists = D->getNumTemplateParameterLists())) {
TempParamLists.set_size(NumTempParamLists);
for (unsigned I = 0; I != NumTempParamLists; ++I) {
TemplateParameterList *TempParams = D->getTemplateParameterList(I);
TemplateParameterList *InstParams = SubstTemplateParams(TempParams);
if (!InstParams)
return NULL;
TempParamLists[I] = InstParams;
}
}
SmallVector<ParmVarDecl *, 4> Params;
TypeSourceInfo *TInfo = SubstFunctionType(D, Params);
if (!TInfo)
return 0;
QualType T = TInfo->getType();
// \brief If the type of this function, after ignoring parentheses,
// is not *directly* a function type, then we're instantiating a function
// that was declared via a typedef, e.g.,
//
// typedef int functype(int, int);
// functype func;
//
// In this case, we'll just go instantiate the ParmVarDecls that we
// synthesized in the method declaration.
if (!isa<FunctionProtoType>(T.IgnoreParens())) {
assert(!Params.size() && "Instantiating type could not yield parameters");
SmallVector<QualType, 4> ParamTypes;
if (SemaRef.SubstParmTypes(D->getLocation(), D->param_begin(),
D->getNumParams(), TemplateArgs, ParamTypes,
&Params))
return 0;
}
NestedNameSpecifierLoc QualifierLoc = D->getQualifierLoc();
if (QualifierLoc) {
QualifierLoc = SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc,
TemplateArgs);
if (!QualifierLoc)
return 0;
}
DeclContext *DC = Owner;
if (isFriend) {
if (QualifierLoc) {
CXXScopeSpec SS;
SS.Adopt(QualifierLoc);
DC = SemaRef.computeDeclContext(SS);
if (DC && SemaRef.RequireCompleteDeclContext(SS, DC))
return 0;
} else {
DC = SemaRef.FindInstantiatedContext(D->getLocation(),
D->getDeclContext(),
TemplateArgs);
}
if (!DC) return 0;
}
// Build the instantiated method declaration.
CXXRecordDecl *Record = cast<CXXRecordDecl>(DC);
CXXMethodDecl *Method = 0;
SourceLocation StartLoc = D->getInnerLocStart();
DeclarationNameInfo NameInfo
= SemaRef.SubstDeclarationNameInfo(D->getNameInfo(), TemplateArgs);
if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
Method = CXXConstructorDecl::Create(SemaRef.Context, Record,
StartLoc, NameInfo, T, TInfo,
Constructor->isExplicit(),
Constructor->isInlineSpecified(),
false, Constructor->isConstexpr());
} else if (CXXDestructorDecl *Destructor = dyn_cast<CXXDestructorDecl>(D)) {
Method = CXXDestructorDecl::Create(SemaRef.Context, Record,
StartLoc, NameInfo, T, TInfo,
Destructor->isInlineSpecified(),
false);
} else if (CXXConversionDecl *Conversion = dyn_cast<CXXConversionDecl>(D)) {
Method = CXXConversionDecl::Create(SemaRef.Context, Record,
StartLoc, NameInfo, T, TInfo,
Conversion->isInlineSpecified(),
Conversion->isExplicit(),
Conversion->isConstexpr(),
Conversion->getLocEnd());
} else {
Method = CXXMethodDecl::Create(SemaRef.Context, Record,
StartLoc, NameInfo, T, TInfo,
D->isStatic(),
D->getStorageClassAsWritten(),
D->isInlineSpecified(),
D->isConstexpr(), D->getLocEnd());
}
if (QualifierLoc)
Method->setQualifierInfo(QualifierLoc);
if (TemplateParams) {
// Our resulting instantiation is actually a function template, since we
// are substituting only the outer template parameters. For example, given
//
// template<typename T>
// struct X {
// template<typename U> void f(T, U);
// };
//
// X<int> x;
//
// We are instantiating the member template "f" within X<int>, which means
// substituting int for T, but leaving "f" as a member function template.
// Build the function template itself.
FunctionTemplate = FunctionTemplateDecl::Create(SemaRef.Context, Record,
Method->getLocation(),
Method->getDeclName(),
TemplateParams, Method);
if (isFriend) {
FunctionTemplate->setLexicalDeclContext(Owner);
FunctionTemplate->setObjectOfFriendDecl(true);
} else if (D->isOutOfLine())
FunctionTemplate->setLexicalDeclContext(D->getLexicalDeclContext());
Method->setDescribedFunctionTemplate(FunctionTemplate);
} else if (FunctionTemplate) {
// Record this function template specialization.
std::pair<const TemplateArgument *, unsigned> Innermost
= TemplateArgs.getInnermost();
Method->setFunctionTemplateSpecialization(FunctionTemplate,
TemplateArgumentList::CreateCopy(SemaRef.Context,
Innermost.first,
Innermost.second),
InsertPos);
} else if (!isFriend) {
// Record that this is an instantiation of a member function.
Method->setInstantiationOfMemberFunction(D, TSK_ImplicitInstantiation);
}
// If we are instantiating a member function defined
// out-of-line, the instantiation will have the same lexical
// context (which will be a namespace scope) as the template.
if (isFriend) {
if (NumTempParamLists)
Method->setTemplateParameterListsInfo(SemaRef.Context,
NumTempParamLists,
TempParamLists.data());
Method->setLexicalDeclContext(Owner);
Method->setObjectOfFriendDecl(true);
} else if (D->isOutOfLine())
Method->setLexicalDeclContext(D->getLexicalDeclContext());
// Attach the parameters
for (unsigned P = 0; P < Params.size(); ++P)
Params[P]->setOwningFunction(Method);
Method->setParams(Params);
if (InitMethodInstantiation(Method, D))
Method->setInvalidDecl();
LookupResult Previous(SemaRef, NameInfo, Sema::LookupOrdinaryName,
Sema::ForRedeclaration);
if (!FunctionTemplate || TemplateParams || isFriend) {
SemaRef.LookupQualifiedName(Previous, Record);
// In C++, the previous declaration we find might be a tag type
// (class or enum). In this case, the new declaration will hide the
// tag type. Note that this does does not apply if we're declaring a
// typedef (C++ [dcl.typedef]p4).
if (Previous.isSingleTagDecl())
Previous.clear();
}
if (!IsClassScopeSpecialization)
SemaRef.CheckFunctionDeclaration(0, Method, Previous, false);
if (D->isPure())
SemaRef.CheckPureMethod(Method, SourceRange());
Method->setAccess(D->getAccess());
SemaRef.CheckOverrideControl(Method);
// If a function is defined as defaulted or deleted, mark it as such now.
if (D->isDefaulted())
Method->setDefaulted();
if (D->isDeletedAsWritten())
Method->setDeletedAsWritten();
if (FunctionTemplate) {
// If there's a function template, let our caller handle it.
} else if (Method->isInvalidDecl() && !Previous.empty()) {
// Don't hide a (potentially) valid declaration with an invalid one.
} else {
NamedDecl *DeclToAdd = (TemplateParams
? cast<NamedDecl>(FunctionTemplate)
: Method);
if (isFriend)
Record->makeDeclVisibleInContext(DeclToAdd);
else if (!IsClassScopeSpecialization)
Owner->addDecl(DeclToAdd);
}
if (D->isExplicitlyDefaulted()) {
SemaRef.SetDeclDefaulted(Method, Method->getLocation());
} else {
assert(!D->isDefaulted() &&
"should not implicitly default uninstantiated function");
}
return Method;
}
Decl *TemplateDeclInstantiator::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
return VisitCXXMethodDecl(D);
}
Decl *TemplateDeclInstantiator::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
return VisitCXXMethodDecl(D);
}
Decl *TemplateDeclInstantiator::VisitCXXConversionDecl(CXXConversionDecl *D) {
return VisitCXXMethodDecl(D);
}
ParmVarDecl *TemplateDeclInstantiator::VisitParmVarDecl(ParmVarDecl *D) {
return SemaRef.SubstParmVarDecl(D, TemplateArgs, /*indexAdjustment*/ 0,
llvm::Optional<unsigned>(),
/*ExpectParameterPack=*/false);
}
Decl *TemplateDeclInstantiator::VisitTemplateTypeParmDecl(
TemplateTypeParmDecl *D) {
// TODO: don't always clone when decls are refcounted.
assert(D->getTypeForDecl()->isTemplateTypeParmType());
TemplateTypeParmDecl *Inst =
TemplateTypeParmDecl::Create(SemaRef.Context, Owner,
D->getLocStart(), D->getLocation(),
D->getDepth() - TemplateArgs.getNumLevels(),
D->getIndex(), D->getIdentifier(),
D->wasDeclaredWithTypename(),
D->isParameterPack());
Inst->setAccess(AS_public);
if (D->hasDefaultArgument())
Inst->setDefaultArgument(D->getDefaultArgumentInfo(), false);
// Introduce this template parameter's instantiation into the instantiation
// scope.
SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Inst);
return Inst;
}
Decl *TemplateDeclInstantiator::VisitNonTypeTemplateParmDecl(
NonTypeTemplateParmDecl *D) {
// Substitute into the type of the non-type template parameter.
TypeLoc TL = D->getTypeSourceInfo()->getTypeLoc();
SmallVector<TypeSourceInfo *, 4> ExpandedParameterPackTypesAsWritten;
SmallVector<QualType, 4> ExpandedParameterPackTypes;
bool IsExpandedParameterPack = false;
TypeSourceInfo *DI;
QualType T;
bool Invalid = false;
if (D->isExpandedParameterPack()) {
// The non-type template parameter pack is an already-expanded pack
// expansion of types. Substitute into each of the expanded types.
ExpandedParameterPackTypes.reserve(D->getNumExpansionTypes());
ExpandedParameterPackTypesAsWritten.reserve(D->getNumExpansionTypes());
for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
TypeSourceInfo *NewDI =SemaRef.SubstType(D->getExpansionTypeSourceInfo(I),
TemplateArgs,
D->getLocation(),
D->getDeclName());
if (!NewDI)
return 0;
ExpandedParameterPackTypesAsWritten.push_back(NewDI);
QualType NewT =SemaRef.CheckNonTypeTemplateParameterType(NewDI->getType(),
D->getLocation());
if (NewT.isNull())
return 0;
ExpandedParameterPackTypes.push_back(NewT);
}
IsExpandedParameterPack = true;
DI = D->getTypeSourceInfo();
T = DI->getType();
} else if (isa<PackExpansionTypeLoc>(TL)) {
// The non-type template parameter pack's type is a pack expansion of types.
// Determine whether we need to expand this parameter pack into separate
// types.
PackExpansionTypeLoc Expansion = cast<PackExpansionTypeLoc>(TL);
TypeLoc Pattern = Expansion.getPatternLoc();
SmallVector<UnexpandedParameterPack, 2> Unexpanded;
SemaRef.collectUnexpandedParameterPacks(Pattern, Unexpanded);
// Determine whether the set of unexpanded parameter packs can and should
// be expanded.
bool Expand = true;
bool RetainExpansion = false;
llvm::Optional<unsigned> OrigNumExpansions
= Expansion.getTypePtr()->getNumExpansions();
llvm::Optional<unsigned> NumExpansions = OrigNumExpansions;
if (SemaRef.CheckParameterPacksForExpansion(Expansion.getEllipsisLoc(),
Pattern.getSourceRange(),
Unexpanded,
TemplateArgs,
Expand, RetainExpansion,
NumExpansions))
return 0;
if (Expand) {
for (unsigned I = 0; I != *NumExpansions; ++I) {
Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, I);
TypeSourceInfo *NewDI = SemaRef.SubstType(Pattern, TemplateArgs,
D->getLocation(),
D->getDeclName());
if (!NewDI)
return 0;
ExpandedParameterPackTypesAsWritten.push_back(NewDI);
QualType NewT = SemaRef.CheckNonTypeTemplateParameterType(
NewDI->getType(),
D->getLocation());
if (NewT.isNull())
return 0;
ExpandedParameterPackTypes.push_back(NewT);
}
// Note that we have an expanded parameter pack. The "type" of this
// expanded parameter pack is the original expansion type, but callers
// will end up using the expanded parameter pack types for type-checking.
IsExpandedParameterPack = true;
DI = D->getTypeSourceInfo();
T = DI->getType();
} else {
// We cannot fully expand the pack expansion now, so substitute into the
// pattern and create a new pack expansion type.
Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, -1);
TypeSourceInfo *NewPattern = SemaRef.SubstType(Pattern, TemplateArgs,
D->getLocation(),
D->getDeclName());
if (!NewPattern)
return 0;
DI = SemaRef.CheckPackExpansion(NewPattern, Expansion.getEllipsisLoc(),
NumExpansions);
if (!DI)
return 0;
T = DI->getType();
}
} else {
// Simple case: substitution into a parameter that is not a parameter pack.
DI = SemaRef.SubstType(D->getTypeSourceInfo(), TemplateArgs,
D->getLocation(), D->getDeclName());
if (!DI)
return 0;
// Check that this type is acceptable for a non-type template parameter.
T = SemaRef.CheckNonTypeTemplateParameterType(DI->getType(),
D->getLocation());
if (T.isNull()) {
T = SemaRef.Context.IntTy;
Invalid = true;
}
}
NonTypeTemplateParmDecl *Param;
if (IsExpandedParameterPack)
Param = NonTypeTemplateParmDecl::Create(SemaRef.Context, Owner,
D->getInnerLocStart(),
D->getLocation(),
D->getDepth() - TemplateArgs.getNumLevels(),
D->getPosition(),
D->getIdentifier(), T,
DI,
ExpandedParameterPackTypes.data(),
ExpandedParameterPackTypes.size(),
ExpandedParameterPackTypesAsWritten.data());
else
Param = NonTypeTemplateParmDecl::Create(SemaRef.Context, Owner,
D->getInnerLocStart(),
D->getLocation(),
D->getDepth() - TemplateArgs.getNumLevels(),
D->getPosition(),
D->getIdentifier(), T,
D->isParameterPack(), DI);
Param->setAccess(AS_public);
if (Invalid)
Param->setInvalidDecl();
Param->setDefaultArgument(D->getDefaultArgument(), false);
// Introduce this template parameter's instantiation into the instantiation
// scope.
SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Param);
return Param;
}
Decl *
TemplateDeclInstantiator::VisitTemplateTemplateParmDecl(
TemplateTemplateParmDecl *D) {
// Instantiate the template parameter list of the template template parameter.
TemplateParameterList *TempParams = D->getTemplateParameters();
TemplateParameterList *InstParams;
{
// Perform the actual substitution of template parameters within a new,
// local instantiation scope.
LocalInstantiationScope Scope(SemaRef);
InstParams = SubstTemplateParams(TempParams);
if (!InstParams)
return NULL;
}
// Build the template template parameter.
TemplateTemplateParmDecl *Param
= TemplateTemplateParmDecl::Create(SemaRef.Context, Owner, D->getLocation(),
D->getDepth() - TemplateArgs.getNumLevels(),
D->getPosition(), D->isParameterPack(),
D->getIdentifier(), InstParams);
Param->setDefaultArgument(D->getDefaultArgument(), false);
Param->setAccess(AS_public);
// Introduce this template parameter's instantiation into the instantiation
// scope.
SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Param);
return Param;
}
Decl *TemplateDeclInstantiator::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
// Using directives are never dependent (and never contain any types or
// expressions), so they require no explicit instantiation work.
UsingDirectiveDecl *Inst
= UsingDirectiveDecl::Create(SemaRef.Context, Owner, D->getLocation(),
D->getNamespaceKeyLocation(),
D->getQualifierLoc(),
D->getIdentLocation(),
D->getNominatedNamespace(),
D->getCommonAncestor());
Owner->addDecl(Inst);
return Inst;
}
Decl *TemplateDeclInstantiator::VisitUsingDecl(UsingDecl *D) {
// The nested name specifier may be dependent, for example
// template <typename T> struct t {
// struct s1 { T f1(); };
// struct s2 : s1 { using s1::f1; };
// };
// template struct t<int>;
// Here, in using s1::f1, s1 refers to t<T>::s1;
// we need to substitute for t<int>::s1.
NestedNameSpecifierLoc QualifierLoc
= SemaRef.SubstNestedNameSpecifierLoc(D->getQualifierLoc(),
TemplateArgs);
if (!QualifierLoc)
return 0;
// The name info is non-dependent, so no transformation
// is required.
DeclarationNameInfo NameInfo = D->getNameInfo();
// We only need to do redeclaration lookups if we're in a class
// scope (in fact, it's not really even possible in non-class
// scopes).
bool CheckRedeclaration = Owner->isRecord();
LookupResult Prev(SemaRef, NameInfo, Sema::LookupUsingDeclName,
Sema::ForRedeclaration);
UsingDecl *NewUD = UsingDecl::Create(SemaRef.Context, Owner,
D->getUsingLocation(),
QualifierLoc,
NameInfo,
D->isTypeName());
CXXScopeSpec SS;
SS.Adopt(QualifierLoc);
if (CheckRedeclaration) {
Prev.setHideTags(false);
SemaRef.LookupQualifiedName(Prev, Owner);
// Check for invalid redeclarations.
if (SemaRef.CheckUsingDeclRedeclaration(D->getUsingLocation(),
D->isTypeName(), SS,
D->getLocation(), Prev))
NewUD->setInvalidDecl();
}
if (!NewUD->isInvalidDecl() &&
SemaRef.CheckUsingDeclQualifier(D->getUsingLocation(), SS,
D->getLocation()))
NewUD->setInvalidDecl();
SemaRef.Context.setInstantiatedFromUsingDecl(NewUD, D);
NewUD->setAccess(D->getAccess());
Owner->addDecl(NewUD);
// Don't process the shadow decls for an invalid decl.
if (NewUD->isInvalidDecl())
return NewUD;
bool isFunctionScope = Owner->isFunctionOrMethod();
// Process the shadow decls.
for (UsingDecl::shadow_iterator I = D->shadow_begin(), E = D->shadow_end();
I != E; ++I) {
UsingShadowDecl *Shadow = *I;
NamedDecl *InstTarget =
cast_or_null<NamedDecl>(SemaRef.FindInstantiatedDecl(
Shadow->getLocation(),
Shadow->getTargetDecl(),
TemplateArgs));
if (!InstTarget)
return 0;
if (CheckRedeclaration &&
SemaRef.CheckUsingShadowDecl(NewUD, InstTarget, Prev))
continue;
UsingShadowDecl *InstShadow
= SemaRef.BuildUsingShadowDecl(/*Scope*/ 0, NewUD, InstTarget);
SemaRef.Context.setInstantiatedFromUsingShadowDecl(InstShadow, Shadow);
if (isFunctionScope)
SemaRef.CurrentInstantiationScope->InstantiatedLocal(Shadow, InstShadow);
}
return NewUD;
}
Decl *TemplateDeclInstantiator::VisitUsingShadowDecl(UsingShadowDecl *D) {
// Ignore these; we handle them in bulk when processing the UsingDecl.
return 0;
}
Decl * TemplateDeclInstantiator
::VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D) {
NestedNameSpecifierLoc QualifierLoc
= SemaRef.SubstNestedNameSpecifierLoc(D->getQualifierLoc(),
TemplateArgs);
if (!QualifierLoc)
return 0;
CXXScopeSpec SS;
SS.Adopt(QualifierLoc);
// Since NameInfo refers to a typename, it cannot be a C++ special name.
// Hence, no tranformation is required for it.
DeclarationNameInfo NameInfo(D->getDeclName(), D->getLocation());
NamedDecl *UD =
SemaRef.BuildUsingDeclaration(/*Scope*/ 0, D->getAccess(),
D->getUsingLoc(), SS, NameInfo, 0,
/*instantiation*/ true,
/*typename*/ true, D->getTypenameLoc());
if (UD)
SemaRef.Context.setInstantiatedFromUsingDecl(cast<UsingDecl>(UD), D);
return UD;
}
Decl * TemplateDeclInstantiator
::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
NestedNameSpecifierLoc QualifierLoc
= SemaRef.SubstNestedNameSpecifierLoc(D->getQualifierLoc(), TemplateArgs);
if (!QualifierLoc)
return 0;
CXXScopeSpec SS;
SS.Adopt(QualifierLoc);
DeclarationNameInfo NameInfo
= SemaRef.SubstDeclarationNameInfo(D->getNameInfo(), TemplateArgs);
NamedDecl *UD =
SemaRef.BuildUsingDeclaration(/*Scope*/ 0, D->getAccess(),
D->getUsingLoc(), SS, NameInfo, 0,
/*instantiation*/ true,
/*typename*/ false, SourceLocation());
if (UD)
SemaRef.Context.setInstantiatedFromUsingDecl(cast<UsingDecl>(UD), D);
return UD;
}
Decl *TemplateDeclInstantiator::VisitClassScopeFunctionSpecializationDecl(
ClassScopeFunctionSpecializationDecl *Decl) {
CXXMethodDecl *OldFD = Decl->getSpecialization();
CXXMethodDecl *NewFD = cast<CXXMethodDecl>(VisitCXXMethodDecl(OldFD, 0, true));
LookupResult Previous(SemaRef, NewFD->getNameInfo(), Sema::LookupOrdinaryName,
Sema::ForRedeclaration);
SemaRef.LookupQualifiedName(Previous, SemaRef.CurContext);
if (SemaRef.CheckFunctionTemplateSpecialization(NewFD, 0, Previous)) {
NewFD->setInvalidDecl();
return NewFD;
}
// Associate the specialization with the pattern.
FunctionDecl *Specialization = cast<FunctionDecl>(Previous.getFoundDecl());
assert(Specialization && "Class scope Specialization is null");
SemaRef.Context.setClassScopeSpecializationPattern(Specialization, OldFD);
return NewFD;
}
Decl *Sema::SubstDecl(Decl *D, DeclContext *Owner,
const MultiLevelTemplateArgumentList &TemplateArgs) {
TemplateDeclInstantiator Instantiator(*this, Owner, TemplateArgs);
if (D->isInvalidDecl())
return 0;
return Instantiator.Visit(D);
}
/// \brief Instantiates a nested template parameter list in the current
/// instantiation context.
///
/// \param L The parameter list to instantiate
///
/// \returns NULL if there was an error
TemplateParameterList *
TemplateDeclInstantiator::SubstTemplateParams(TemplateParameterList *L) {
// Get errors for all the parameters before bailing out.
bool Invalid = false;
unsigned N = L->size();
typedef SmallVector<NamedDecl *, 8> ParamVector;
ParamVector Params;
Params.reserve(N);
for (TemplateParameterList::iterator PI = L->begin(), PE = L->end();
PI != PE; ++PI) {
NamedDecl *D = cast_or_null<NamedDecl>(Visit(*PI));
Params.push_back(D);
Invalid = Invalid || !D || D->isInvalidDecl();
}
// Clean up if we had an error.
if (Invalid)
return NULL;
TemplateParameterList *InstL
= TemplateParameterList::Create(SemaRef.Context, L->getTemplateLoc(),
L->getLAngleLoc(), &Params.front(), N,
L->getRAngleLoc());
return InstL;
}
/// \brief Instantiate the declaration of a class template partial
/// specialization.
///
/// \param ClassTemplate the (instantiated) class template that is partially
// specialized by the instantiation of \p PartialSpec.
///
/// \param PartialSpec the (uninstantiated) class template partial
/// specialization that we are instantiating.
///
/// \returns The instantiated partial specialization, if successful; otherwise,
/// NULL to indicate an error.
ClassTemplatePartialSpecializationDecl *
TemplateDeclInstantiator::InstantiateClassTemplatePartialSpecialization(
ClassTemplateDecl *ClassTemplate,
ClassTemplatePartialSpecializationDecl *PartialSpec) {
// Create a local instantiation scope for this class template partial
// specialization, which will contain the instantiations of the template
// parameters.
LocalInstantiationScope Scope(SemaRef);
// Substitute into the template parameters of the class template partial
// specialization.
TemplateParameterList *TempParams = PartialSpec->getTemplateParameters();
TemplateParameterList *InstParams = SubstTemplateParams(TempParams);
if (!InstParams)
return 0;
// Substitute into the template arguments of the class template partial
// specialization.
TemplateArgumentListInfo InstTemplateArgs; // no angle locations
if (SemaRef.Subst(PartialSpec->getTemplateArgsAsWritten(),
PartialSpec->getNumTemplateArgsAsWritten(),
InstTemplateArgs, TemplateArgs))
return 0;
// Check that the template argument list is well-formed for this
// class template.
SmallVector<TemplateArgument, 4> Converted;
if (SemaRef.CheckTemplateArgumentList(ClassTemplate,
PartialSpec->getLocation(),
InstTemplateArgs,
false,
Converted))
return 0;
// Figure out where to insert this class template partial specialization
// in the member template's set of class template partial specializations.
void *InsertPos = 0;
ClassTemplateSpecializationDecl *PrevDecl
= ClassTemplate->findPartialSpecialization(Converted.data(),
Converted.size(), InsertPos);
// Build the canonical type that describes the converted template
// arguments of the class template partial specialization.
QualType CanonType
= SemaRef.Context.getTemplateSpecializationType(TemplateName(ClassTemplate),
Converted.data(),
Converted.size());
// Build the fully-sugared type for this class template
// specialization as the user wrote in the specialization
// itself. This means that we'll pretty-print the type retrieved
// from the specialization's declaration the way that the user
// actually wrote the specialization, rather than formatting the
// name based on the "canonical" representation used to store the
// template arguments in the specialization.
TypeSourceInfo *WrittenTy
= SemaRef.Context.getTemplateSpecializationTypeInfo(
TemplateName(ClassTemplate),
PartialSpec->getLocation(),
InstTemplateArgs,
CanonType);
if (PrevDecl) {
// We've already seen a partial specialization with the same template
// parameters and template arguments. This can happen, for example, when
// substituting the outer template arguments ends up causing two
// class template partial specializations of a member class template
// to have identical forms, e.g.,
//
// template<typename T, typename U>
// struct Outer {
// template<typename X, typename Y> struct Inner;
// template<typename Y> struct Inner<T, Y>;
// template<typename Y> struct Inner<U, Y>;
// };
//
// Outer<int, int> outer; // error: the partial specializations of Inner
// // have the same signature.
SemaRef.Diag(PartialSpec->getLocation(), diag::err_partial_spec_redeclared)
<< WrittenTy->getType();
SemaRef.Diag(PrevDecl->getLocation(), diag::note_prev_partial_spec_here)
<< SemaRef.Context.getTypeDeclType(PrevDecl);
return 0;
}
// Create the class template partial specialization declaration.
ClassTemplatePartialSpecializationDecl *InstPartialSpec
= ClassTemplatePartialSpecializationDecl::Create(SemaRef.Context,
PartialSpec->getTagKind(),
Owner,
PartialSpec->getLocStart(),
PartialSpec->getLocation(),
InstParams,
ClassTemplate,
Converted.data(),
Converted.size(),
InstTemplateArgs,
CanonType,
0,
ClassTemplate->getNextPartialSpecSequenceNumber());
// Substitute the nested name specifier, if any.
if (SubstQualifier(PartialSpec, InstPartialSpec))
return 0;
InstPartialSpec->setInstantiatedFromMember(PartialSpec);
InstPartialSpec->setTypeAsWritten(WrittenTy);
// Add this partial specialization to the set of class template partial
// specializations.
ClassTemplate->AddPartialSpecialization(InstPartialSpec, InsertPos);
return InstPartialSpec;
}
TypeSourceInfo*
TemplateDeclInstantiator::SubstFunctionType(FunctionDecl *D,
SmallVectorImpl<ParmVarDecl *> &Params) {
TypeSourceInfo *OldTInfo = D->getTypeSourceInfo();
assert(OldTInfo && "substituting function without type source info");
assert(Params.empty() && "parameter vector is non-empty at start");
TypeSourceInfo *NewTInfo
= SemaRef.SubstFunctionDeclType(OldTInfo, TemplateArgs,
D->getTypeSpecStartLoc(),
D->getDeclName());
if (!NewTInfo)
return 0;
if (NewTInfo != OldTInfo) {
// Get parameters from the new type info.
TypeLoc OldTL = OldTInfo->getTypeLoc().IgnoreParens();
if (FunctionProtoTypeLoc *OldProtoLoc
= dyn_cast<FunctionProtoTypeLoc>(&OldTL)) {
TypeLoc NewTL = NewTInfo->getTypeLoc().IgnoreParens();
FunctionProtoTypeLoc *NewProtoLoc = cast<FunctionProtoTypeLoc>(&NewTL);
assert(NewProtoLoc && "Missing prototype?");
unsigned NewIdx = 0, NumNewParams = NewProtoLoc->getNumArgs();
for (unsigned OldIdx = 0, NumOldParams = OldProtoLoc->getNumArgs();
OldIdx != NumOldParams; ++OldIdx) {
ParmVarDecl *OldParam = OldProtoLoc->getArg(OldIdx);
if (!OldParam->isParameterPack() ||
// FIXME: Is this right? OldParam could expand to an empty parameter
// pack and the next parameter could be an unexpanded parameter pack
(NewIdx < NumNewParams &&
NewProtoLoc->getArg(NewIdx)->isParameterPack())) {
// Simple case: normal parameter, or a parameter pack that's
// instantiated to a (still-dependent) parameter pack.
ParmVarDecl *NewParam = NewProtoLoc->getArg(NewIdx++);
Params.push_back(NewParam);
SemaRef.CurrentInstantiationScope->InstantiatedLocal(OldParam,
NewParam);
continue;
}
// Parameter pack: make the instantiation an argument pack.
SemaRef.CurrentInstantiationScope->MakeInstantiatedLocalArgPack(
OldParam);
unsigned NumArgumentsInExpansion
= SemaRef.getNumArgumentsInExpansion(OldParam->getType(),
TemplateArgs);
while (NumArgumentsInExpansion--) {
ParmVarDecl *NewParam = NewProtoLoc->getArg(NewIdx++);
Params.push_back(NewParam);
SemaRef.CurrentInstantiationScope->InstantiatedLocalPackArg(OldParam,
NewParam);
}
}
}
} else {
// The function type itself was not dependent and therefore no
// substitution occurred. However, we still need to instantiate
// the function parameters themselves.
TypeLoc OldTL = OldTInfo->getTypeLoc().IgnoreParens();
if (FunctionProtoTypeLoc *OldProtoLoc
= dyn_cast<FunctionProtoTypeLoc>(&OldTL)) {
for (unsigned i = 0, i_end = OldProtoLoc->getNumArgs(); i != i_end; ++i) {
ParmVarDecl *Parm = VisitParmVarDecl(OldProtoLoc->getArg(i));
if (!Parm)
return 0;
Params.push_back(Parm);
}
}
}
return NewTInfo;
}
/// \brief Initializes the common fields of an instantiation function
/// declaration (New) from the corresponding fields of its template (Tmpl).
///
/// \returns true if there was an error
bool
TemplateDeclInstantiator::InitFunctionInstantiation(FunctionDecl *New,
FunctionDecl *Tmpl) {
if (Tmpl->isDeletedAsWritten())
New->setDeletedAsWritten();
// If we are performing substituting explicitly-specified template arguments
// or deduced template arguments into a function template and we reach this
// point, we are now past the point where SFINAE applies and have committed
// to keeping the new function template specialization. We therefore
// convert the active template instantiation for the function template
// into a template instantiation for this specific function template
// specialization, which is not a SFINAE context, so that we diagnose any
// further errors in the declaration itself.
typedef Sema::ActiveTemplateInstantiation ActiveInstType;
ActiveInstType &ActiveInst = SemaRef.ActiveTemplateInstantiations.back();
if (ActiveInst.Kind == ActiveInstType::ExplicitTemplateArgumentSubstitution ||
ActiveInst.Kind == ActiveInstType::DeducedTemplateArgumentSubstitution) {
if (FunctionTemplateDecl *FunTmpl
= dyn_cast<FunctionTemplateDecl>((Decl *)ActiveInst.Entity)) {
assert(FunTmpl->getTemplatedDecl() == Tmpl &&
"Deduction from the wrong function template?");
(void) FunTmpl;
ActiveInst.Kind = ActiveInstType::TemplateInstantiation;
ActiveInst.Entity = reinterpret_cast<uintptr_t>(New);
--SemaRef.NonInstantiationEntries;
}
}
const FunctionProtoType *Proto = Tmpl->getType()->getAs<FunctionProtoType>();
assert(Proto && "Function template without prototype?");
if (Proto->hasExceptionSpec() || Proto->getNoReturnAttr()) {
// The function has an exception specification or a "noreturn"
// attribute. Substitute into each of the exception types.
SmallVector<QualType, 4> Exceptions;
for (unsigned I = 0, N = Proto->getNumExceptions(); I != N; ++I) {
// FIXME: Poor location information!
if (const PackExpansionType *PackExpansion
= Proto->getExceptionType(I)->getAs<PackExpansionType>()) {
// We have a pack expansion. Instantiate it.
SmallVector<UnexpandedParameterPack, 2> Unexpanded;
SemaRef.collectUnexpandedParameterPacks(PackExpansion->getPattern(),
Unexpanded);
assert(!Unexpanded.empty() &&
"Pack expansion without parameter packs?");
bool Expand = false;
bool RetainExpansion = false;
llvm::Optional<unsigned> NumExpansions
= PackExpansion->getNumExpansions();
if (SemaRef.CheckParameterPacksForExpansion(New->getLocation(),
SourceRange(),
Unexpanded,
TemplateArgs,
Expand,
RetainExpansion,
NumExpansions))
break;
if (!Expand) {
// We can't expand this pack expansion into separate arguments yet;
// just substitute into the pattern and create a new pack expansion
// type.
Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, -1);
QualType T = SemaRef.SubstType(PackExpansion->getPattern(),
TemplateArgs,
New->getLocation(), New->getDeclName());
if (T.isNull())
break;
T = SemaRef.Context.getPackExpansionType(T, NumExpansions);
Exceptions.push_back(T);
continue;
}
// Substitute into the pack expansion pattern for each template
bool Invalid = false;
for (unsigned ArgIdx = 0; ArgIdx != *NumExpansions; ++ArgIdx) {
Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(SemaRef, ArgIdx);
QualType T = SemaRef.SubstType(PackExpansion->getPattern(),
TemplateArgs,
New->getLocation(), New->getDeclName());
if (T.isNull()) {
Invalid = true;
break;
}
Exceptions.push_back(T);
}
if (Invalid)
break;
continue;
}
QualType T
= SemaRef.SubstType(Proto->getExceptionType(I), TemplateArgs,
New->getLocation(), New->getDeclName());
if (T.isNull() ||
SemaRef.CheckSpecifiedExceptionType(T, New->getLocation()))
continue;
Exceptions.push_back(T);
}
Expr *NoexceptExpr = 0;
if (Expr *OldNoexceptExpr = Proto->getNoexceptExpr()) {
EnterExpressionEvaluationContext Unevaluated(SemaRef,
Sema::ConstantEvaluated);
ExprResult E = SemaRef.SubstExpr(OldNoexceptExpr, TemplateArgs);
if (E.isUsable())
E = SemaRef.CheckBooleanCondition(E.get(), E.get()->getLocStart());
if (E.isUsable()) {
NoexceptExpr = E.take();
if (!NoexceptExpr->isTypeDependent() &&
!NoexceptExpr->isValueDependent())
NoexceptExpr = SemaRef.VerifyIntegerConstantExpression(NoexceptExpr,
0, SemaRef.PDiag(diag::err_noexcept_needs_constant_expression),
/*AllowFold*/ false).take();
}
}
// Rebuild the function type
FunctionProtoType::ExtProtoInfo EPI = Proto->getExtProtoInfo();
EPI.ExceptionSpecType = Proto->getExceptionSpecType();
EPI.NumExceptions = Exceptions.size();
EPI.Exceptions = Exceptions.data();
EPI.NoexceptExpr = NoexceptExpr;
EPI.ExtInfo = Proto->getExtInfo();
const FunctionProtoType *NewProto
= New->getType()->getAs<FunctionProtoType>();
assert(NewProto && "Template instantiation without function prototype?");
New->setType(SemaRef.Context.getFunctionType(NewProto->getResultType(),
NewProto->arg_type_begin(),
NewProto->getNumArgs(),
EPI));
}
const FunctionDecl* Definition = Tmpl;
// Get the definition. Leaves the variable unchanged if undefined.
Tmpl->isDefined(Definition);
SemaRef.InstantiateAttrs(TemplateArgs, Definition, New,
LateAttrs, StartingScope);
return false;
}
/// \brief Initializes common fields of an instantiated method
/// declaration (New) from the corresponding fields of its template
/// (Tmpl).
///
/// \returns true if there was an error
bool
TemplateDeclInstantiator::InitMethodInstantiation(CXXMethodDecl *New,
CXXMethodDecl *Tmpl) {
if (InitFunctionInstantiation(New, Tmpl))
return true;
New->setAccess(Tmpl->getAccess());
if (Tmpl->isVirtualAsWritten())
New->setVirtualAsWritten(true);
// FIXME: attributes
// FIXME: New needs a pointer to Tmpl
return false;
}
/// \brief Instantiate the definition of the given function from its
/// template.
///
/// \param PointOfInstantiation the point at which the instantiation was
/// required. Note that this is not precisely a "point of instantiation"
/// for the function, but it's close.
///
/// \param Function the already-instantiated declaration of a
/// function template specialization or member function of a class template
/// specialization.
///
/// \param Recursive if true, recursively instantiates any functions that
/// are required by this instantiation.
///
/// \param DefinitionRequired if true, then we are performing an explicit
/// instantiation where the body of the function is required. Complain if
/// there is no such body.
void Sema::InstantiateFunctionDefinition(SourceLocation PointOfInstantiation,
FunctionDecl *Function,
bool Recursive,
bool DefinitionRequired) {
if (Function->isInvalidDecl() || Function->isDefined())
return;
// Never instantiate an explicit specialization except if it is a class scope
// explicit specialization.
if (Function->getTemplateSpecializationKind() == TSK_ExplicitSpecialization &&
!Function->getClassScopeSpecializationPattern())
return;
// Find the function body that we'll be substituting.
const FunctionDecl *PatternDecl = Function->getTemplateInstantiationPattern();
assert(PatternDecl && "instantiating a non-template");
Stmt *Pattern = PatternDecl->getBody(PatternDecl);
assert(PatternDecl && "template definition is not a template");
if (!Pattern) {
// Try to find a defaulted definition
PatternDecl->isDefined(PatternDecl);
}
assert(PatternDecl && "template definition is not a template");
// Postpone late parsed template instantiations.
if (PatternDecl->isLateTemplateParsed() &&
!LateTemplateParser) {
PendingInstantiations.push_back(
std::make_pair(Function, PointOfInstantiation));
return;
}
// Call the LateTemplateParser callback if there a need to late parse
// a templated function definition.
if (!Pattern && PatternDecl->isLateTemplateParsed() &&
LateTemplateParser) {
LateTemplateParser(OpaqueParser, PatternDecl);
Pattern = PatternDecl->getBody(PatternDecl);
}
if (!Pattern && !PatternDecl->isDefaulted()) {
if (DefinitionRequired) {
if (Function->getPrimaryTemplate())
Diag(PointOfInstantiation,
diag::err_explicit_instantiation_undefined_func_template)
<< Function->getPrimaryTemplate();
else
Diag(PointOfInstantiation,
diag::err_explicit_instantiation_undefined_member)
<< 1 << Function->getDeclName() << Function->getDeclContext();
if (PatternDecl)
Diag(PatternDecl->getLocation(),
diag::note_explicit_instantiation_here);
Function->setInvalidDecl();
} else if (Function->getTemplateSpecializationKind()
== TSK_ExplicitInstantiationDefinition) {
PendingInstantiations.push_back(
std::make_pair(Function, PointOfInstantiation));
}
return;
}
// 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 (Function->getTemplateSpecializationKind()
== TSK_ExplicitInstantiationDeclaration &&
!PatternDecl->isInlined())
return;
InstantiatingTemplate Inst(*this, PointOfInstantiation, Function);
if (Inst)
return;
// Copy the inner loc start from the pattern.
Function->setInnerLocStart(PatternDecl->getInnerLocStart());
// If we're performing recursive template instantiation, create our own
// queue of pending implicit instantiations that we will instantiate later,
// while we're still within our own instantiation context.
SmallVector<VTableUse, 16> SavedVTableUses;
std::deque<PendingImplicitInstantiation> SavedPendingInstantiations;
if (Recursive) {
VTableUses.swap(SavedVTableUses);
PendingInstantiations.swap(SavedPendingInstantiations);
}
EnterExpressionEvaluationContext EvalContext(*this,
Sema::PotentiallyEvaluated);
ActOnStartOfFunctionDef(0, Function);
// Introduce a new scope where local variable instantiations will be
// recorded, unless we're actually a member function within a local
// class, in which case we need to merge our results with the parent
// scope (of the enclosing function).
bool MergeWithParentScope = false;
if (CXXRecordDecl *Rec = dyn_cast<CXXRecordDecl>(Function->getDeclContext()))
MergeWithParentScope = Rec->isLocalClass();
LocalInstantiationScope Scope(*this, MergeWithParentScope);
// Enter the scope of this instantiation. We don't use
// PushDeclContext because we don't have a scope.
Sema::ContextRAII savedContext(*this, Function);
MultiLevelTemplateArgumentList TemplateArgs =
getTemplateInstantiationArgs(Function, 0, false, PatternDecl);
// Introduce the instantiated function parameters into the local
// instantiation scope, and set the parameter names to those used
// in the template.
unsigned FParamIdx = 0;
for (unsigned I = 0, N = PatternDecl->getNumParams(); I != N; ++I) {
const ParmVarDecl *PatternParam = PatternDecl->getParamDecl(I);
if (!PatternParam->isParameterPack()) {
// Simple case: not a parameter pack.
assert(FParamIdx < Function->getNumParams());
ParmVarDecl *FunctionParam = Function->getParamDecl(FParamIdx);
FunctionParam->setDeclName(PatternParam->getDeclName());
Scope.InstantiatedLocal(PatternParam, FunctionParam);
++FParamIdx;
continue;
}
// Expand the parameter pack.
Scope.MakeInstantiatedLocalArgPack(PatternParam);
unsigned NumArgumentsInExpansion
= getNumArgumentsInExpansion(PatternParam->getType(), TemplateArgs);
for (unsigned Arg = 0; Arg < NumArgumentsInExpansion; ++Arg) {
ParmVarDecl *FunctionParam = Function->getParamDecl(FParamIdx);
FunctionParam->setDeclName(PatternParam->getDeclName());
Scope.InstantiatedLocalPackArg(PatternParam, FunctionParam);
++FParamIdx;
}
}
if (PatternDecl->isDefaulted()) {
ActOnFinishFunctionBody(Function, 0, /*IsInstantiation=*/true);
SetDeclDefaulted(Function, PatternDecl->getLocation());
} else {
// If this is a constructor, instantiate the member initializers.
if (const CXXConstructorDecl *Ctor =
dyn_cast<CXXConstructorDecl>(PatternDecl)) {
InstantiateMemInitializers(cast<CXXConstructorDecl>(Function), Ctor,
TemplateArgs);
}
// Instantiate the function body.
StmtResult Body = SubstStmt(Pattern, TemplateArgs);
if (Body.isInvalid())
Function->setInvalidDecl();
ActOnFinishFunctionBody(Function, Body.get(),
/*IsInstantiation=*/true);
}
PerformDependentDiagnostics(PatternDecl, TemplateArgs);
savedContext.pop();
DeclGroupRef DG(Function);
Consumer.HandleTopLevelDecl(DG);
// This class may have local implicit instantiations that need to be
// instantiation within this scope.
PerformPendingInstantiations(/*LocalOnly=*/true);
Scope.Exit();
if (Recursive) {
// Define any pending vtables.
DefineUsedVTables();
// Instantiate any pending implicit instantiations found during the
// instantiation of this template.
PerformPendingInstantiations();
// Restore the set of pending vtables.
assert(VTableUses.empty() &&
"VTableUses should be empty before it is discarded.");
VTableUses.swap(SavedVTableUses);
// Restore the set of pending implicit instantiations.
assert(PendingInstantiations.empty() &&
"PendingInstantiations should be empty before it is discarded.");
PendingInstantiations.swap(SavedPendingInstantiations);
}
}
/// \brief Instantiate the definition of the given variable from its
/// template.
///
/// \param PointOfInstantiation the point at which the instantiation was
/// required. Note that this is not precisely a "point of instantiation"
/// for the function, but it's close.
///
/// \param Var the already-instantiated declaration of a static member
/// variable of a class template specialization.
///
/// \param Recursive if true, recursively instantiates any functions that
/// are required by this instantiation.
///
/// \param DefinitionRequired if true, then we are performing an explicit
/// instantiation where an out-of-line definition of the member variable
/// is required. Complain if there is no such definition.
void Sema::InstantiateStaticDataMemberDefinition(
SourceLocation PointOfInstantiation,
VarDecl *Var,
bool Recursive,
bool DefinitionRequired) {
if (Var->isInvalidDecl())
return;
// Find the out-of-line definition of this static data member.
VarDecl *Def = Var->getInstantiatedFromStaticDataMember();
assert(Def && "This data member was not instantiated from a template?");
assert(Def->isStaticDataMember() && "Not a static data member?");
Def = Def->getOutOfLineDefinition();
if (!Def) {
// We did not find an out-of-line definition of this static data member,
// so we won't perform any instantiation. Rather, we rely on the user to
// instantiate this definition (or provide a specialization for it) in
// another translation unit.
if (DefinitionRequired) {
Def = Var->getInstantiatedFromStaticDataMember();
Diag(PointOfInstantiation,
diag::err_explicit_instantiation_undefined_member)
<< 2 << Var->getDeclName() << Var->getDeclContext();
Diag(Def->getLocation(), diag::note_explicit_instantiation_here);
} else if (Var->getTemplateSpecializationKind()
== TSK_ExplicitInstantiationDefinition) {
PendingInstantiations.push_back(
std::make_pair(Var, PointOfInstantiation));
}
return;
}
TemplateSpecializationKind TSK = Var->getTemplateSpecializationKind();
// Never instantiate an explicit specialization.
if (TSK == TSK_ExplicitSpecialization)
return;
// 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 (TSK == TSK_ExplicitInstantiationDeclaration)
return;
Consumer.HandleCXXStaticMemberVarInstantiation(Var);
// If we already have a definition, we're done.
if (Var->getDefinition())
return;
InstantiatingTemplate Inst(*this, PointOfInstantiation, Var);
if (Inst)
return;
// If we're performing recursive template instantiation, create our own
// queue of pending implicit instantiations that we will instantiate later,
// while we're still within our own instantiation context.
SmallVector<VTableUse, 16> SavedVTableUses;
std::deque<PendingImplicitInstantiation> SavedPendingInstantiations;
if (Recursive) {
VTableUses.swap(SavedVTableUses);
PendingInstantiations.swap(SavedPendingInstantiations);
}
// Enter the scope of this instantiation. We don't use
// PushDeclContext because we don't have a scope.
ContextRAII previousContext(*this, Var->getDeclContext());
LocalInstantiationScope Local(*this);
VarDecl *OldVar = Var;
Var = cast_or_null<VarDecl>(SubstDecl(Def, Var->getDeclContext(),
getTemplateInstantiationArgs(Var)));
previousContext.pop();
if (Var) {
MemberSpecializationInfo *MSInfo = OldVar->getMemberSpecializationInfo();
assert(MSInfo && "Missing member specialization information?");
Var->setTemplateSpecializationKind(MSInfo->getTemplateSpecializationKind(),
MSInfo->getPointOfInstantiation());
DeclGroupRef DG(Var);
Consumer.HandleTopLevelDecl(DG);
}
Local.Exit();
if (Recursive) {
// Define any newly required vtables.
DefineUsedVTables();
// Instantiate any pending implicit instantiations found during the
// instantiation of this template.
PerformPendingInstantiations();
// Restore the set of pending vtables.
assert(VTableUses.empty() &&
"VTableUses should be empty before it is discarded, "
"while instantiating static data member.");
VTableUses.swap(SavedVTableUses);
// Restore the set of pending implicit instantiations.
assert(PendingInstantiations.empty() &&
"PendingInstantiations should be empty before it is discarded, "
"while instantiating static data member.");
PendingInstantiations.swap(SavedPendingInstantiations);
}
}
void
Sema::InstantiateMemInitializers(CXXConstructorDecl *New,
const CXXConstructorDecl *Tmpl,
const MultiLevelTemplateArgumentList &TemplateArgs) {
SmallVector<CXXCtorInitializer*, 4> NewInits;
bool AnyErrors = false;
// Instantiate all the initializers.
for (CXXConstructorDecl::init_const_iterator Inits = Tmpl->init_begin(),
InitsEnd = Tmpl->init_end();
Inits != InitsEnd; ++Inits) {
CXXCtorInitializer *Init = *Inits;
// Only instantiate written initializers, let Sema re-construct implicit
// ones.
if (!Init->isWritten())
continue;
SourceLocation EllipsisLoc;
if (Init->isPackExpansion()) {
// This is a pack expansion. We should expand it now.
TypeLoc BaseTL = Init->getTypeSourceInfo()->getTypeLoc();
SmallVector<UnexpandedParameterPack, 2> Unexpanded;
collectUnexpandedParameterPacks(BaseTL, Unexpanded);
bool ShouldExpand = false;
bool RetainExpansion = false;
llvm::Optional<unsigned> NumExpansions;
if (CheckParameterPacksForExpansion(Init->getEllipsisLoc(),
BaseTL.getSourceRange(),
Unexpanded,
TemplateArgs, ShouldExpand,
RetainExpansion,
NumExpansions)) {
AnyErrors = true;
New->setInvalidDecl();
continue;
}
assert(ShouldExpand && "Partial instantiation of base initializer?");
// Loop over all of the arguments in the argument pack(s),
for (unsigned I = 0; I != *NumExpansions; ++I) {
Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(*this, I);
// Instantiate the initializer.
ExprResult TempInit = SubstInitializer(Init->getInit(), TemplateArgs,
/*CXXDirectInit=*/true);
if (TempInit.isInvalid()) {
AnyErrors = true;
break;
}
// Instantiate the base type.
TypeSourceInfo *BaseTInfo = SubstType(Init->getTypeSourceInfo(),
TemplateArgs,
Init->getSourceLocation(),
New->getDeclName());
if (!BaseTInfo) {
AnyErrors = true;
break;
}
// Build the initializer.
MemInitResult NewInit = BuildBaseInitializer(BaseTInfo->getType(),
BaseTInfo, TempInit.take(),
New->getParent(),
SourceLocation());
if (NewInit.isInvalid()) {
AnyErrors = true;
break;
}
NewInits.push_back(NewInit.get());
}
continue;
}
// Instantiate the initializer.
ExprResult TempInit = SubstInitializer(Init->getInit(), TemplateArgs,
/*CXXDirectInit=*/true);
if (TempInit.isInvalid()) {
AnyErrors = true;
continue;
}
MemInitResult NewInit;
if (Init->isDelegatingInitializer() || Init->isBaseInitializer()) {
TypeSourceInfo *TInfo = SubstType(Init->getTypeSourceInfo(),
TemplateArgs,
Init->getSourceLocation(),
New->getDeclName());
if (!TInfo) {
AnyErrors = true;
New->setInvalidDecl();
continue;
}
if (Init->isBaseInitializer())
NewInit = BuildBaseInitializer(TInfo->getType(), TInfo, TempInit.take(),
New->getParent(), EllipsisLoc);
else
NewInit = BuildDelegatingInitializer(TInfo, TempInit.take(),
cast<CXXRecordDecl>(CurContext->getParent()));
} else if (Init->isMemberInitializer()) {
FieldDecl *Member = cast_or_null<FieldDecl>(FindInstantiatedDecl(
Init->getMemberLocation(),
Init->getMember(),
TemplateArgs));
if (!Member) {
AnyErrors = true;
New->setInvalidDecl();
continue;
}
NewInit = BuildMemberInitializer(Member, TempInit.take(),
Init->getSourceLocation());
} else if (Init->isIndirectMemberInitializer()) {
IndirectFieldDecl *IndirectMember =
cast_or_null<IndirectFieldDecl>(FindInstantiatedDecl(
Init->getMemberLocation(),
Init->getIndirectMember(), TemplateArgs));
if (!IndirectMember) {
AnyErrors = true;
New->setInvalidDecl();
continue;
}
NewInit = BuildMemberInitializer(IndirectMember, TempInit.take(),
Init->getSourceLocation());
}
if (NewInit.isInvalid()) {
AnyErrors = true;
New->setInvalidDecl();
} else {
NewInits.push_back(NewInit.get());
}
}
// Assign all the initializers to the new constructor.
ActOnMemInitializers(New,
/*FIXME: ColonLoc */
SourceLocation(),
NewInits.data(), NewInits.size(),
AnyErrors);
}
ExprResult Sema::SubstInitializer(Expr *Init,
const MultiLevelTemplateArgumentList &TemplateArgs,
bool CXXDirectInit) {
// Initializers are instantiated like expressions, except that various outer
// layers are stripped.
if (!Init)
return Owned(Init);
if (ExprWithCleanups *ExprTemp = dyn_cast<ExprWithCleanups>(Init))
Init = ExprTemp->getSubExpr();
while (CXXBindTemporaryExpr *Binder = dyn_cast<CXXBindTemporaryExpr>(Init))
Init = Binder->getSubExpr();
if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(Init))
Init = ICE->getSubExprAsWritten();
// If this is a direct-initializer, we take apart CXXConstructExprs.
// Everything else is passed through.
CXXConstructExpr *Construct;
if (!CXXDirectInit || !(Construct = dyn_cast<CXXConstructExpr>(Init)) ||
isa<CXXTemporaryObjectExpr>(Construct))
return SubstExpr(Init, TemplateArgs);
ASTOwningVector<Expr*> NewArgs(*this);
if (SubstExprs(Construct->getArgs(), Construct->getNumArgs(), true,
TemplateArgs, NewArgs))
return ExprError();
// Treat an empty initializer like none.
if (NewArgs.empty())
return Owned((Expr*)0);
// Build a ParenListExpr to represent anything else.
// FIXME: Fake locations!
SourceLocation Loc = PP.getLocForEndOfToken(Init->getLocStart());
return ActOnParenListExpr(Loc, Loc, move_arg(NewArgs));
}
// TODO: this could be templated if the various decl types used the
// same method name.
static bool isInstantiationOf(ClassTemplateDecl *Pattern,
ClassTemplateDecl *Instance) {
Pattern = Pattern->getCanonicalDecl();
do {
Instance = Instance->getCanonicalDecl();
if (Pattern == Instance) return true;
Instance = Instance->getInstantiatedFromMemberTemplate();
} while (Instance);
return false;
}
static bool isInstantiationOf(FunctionTemplateDecl *Pattern,
FunctionTemplateDecl *Instance) {
Pattern = Pattern->getCanonicalDecl();
do {
Instance = Instance->getCanonicalDecl();
if (Pattern == Instance) return true;
Instance = Instance->getInstantiatedFromMemberTemplate();
} while (Instance);
return false;
}
static bool
isInstantiationOf(ClassTemplatePartialSpecializationDecl *Pattern,
ClassTemplatePartialSpecializationDecl *Instance) {
Pattern
= cast<ClassTemplatePartialSpecializationDecl>(Pattern->getCanonicalDecl());
do {
Instance = cast<ClassTemplatePartialSpecializationDecl>(
Instance->getCanonicalDecl());
if (Pattern == Instance)
return true;
Instance = Instance->getInstantiatedFromMember();
} while (Instance);
return false;
}
static bool isInstantiationOf(CXXRecordDecl *Pattern,
CXXRecordDecl *Instance) {
Pattern = Pattern->getCanonicalDecl();
do {
Instance = Instance->getCanonicalDecl();
if (Pattern == Instance) return true;
Instance = Instance->getInstantiatedFromMemberClass();
} while (Instance);
return false;
}
static bool isInstantiationOf(FunctionDecl *Pattern,
FunctionDecl *Instance) {
Pattern = Pattern->getCanonicalDecl();
do {
Instance = Instance->getCanonicalDecl();
if (Pattern == Instance) return true;
Instance = Instance->getInstantiatedFromMemberFunction();
} while (Instance);
return false;
}
static bool isInstantiationOf(EnumDecl *Pattern,
EnumDecl *Instance) {
Pattern = Pattern->getCanonicalDecl();
do {
Instance = Instance->getCanonicalDecl();
if (Pattern == Instance) return true;
Instance = Instance->getInstantiatedFromMemberEnum();
} while (Instance);
return false;
}
static bool isInstantiationOf(UsingShadowDecl *Pattern,
UsingShadowDecl *Instance,
ASTContext &C) {
return C.getInstantiatedFromUsingShadowDecl(Instance) == Pattern;
}
static bool isInstantiationOf(UsingDecl *Pattern,
UsingDecl *Instance,
ASTContext &C) {
return C.getInstantiatedFromUsingDecl(Instance) == Pattern;
}
static bool isInstantiationOf(UnresolvedUsingValueDecl *Pattern,
UsingDecl *Instance,
ASTContext &C) {
return C.getInstantiatedFromUsingDecl(Instance) == Pattern;
}
static bool isInstantiationOf(UnresolvedUsingTypenameDecl *Pattern,
UsingDecl *Instance,
ASTContext &C) {
return C.getInstantiatedFromUsingDecl(Instance) == Pattern;
}
static bool isInstantiationOfStaticDataMember(VarDecl *Pattern,
VarDecl *Instance) {
assert(Instance->isStaticDataMember());
Pattern = Pattern->getCanonicalDecl();
do {
Instance = Instance->getCanonicalDecl();
if (Pattern == Instance) return true;
Instance = Instance->getInstantiatedFromStaticDataMember();
} while (Instance);
return false;
}
// Other is the prospective instantiation
// D is the prospective pattern
static bool isInstantiationOf(ASTContext &Ctx, NamedDecl *D, Decl *Other) {
if (D->getKind() != Other->getKind()) {
if (UnresolvedUsingTypenameDecl *UUD
= dyn_cast<UnresolvedUsingTypenameDecl>(D)) {
if (UsingDecl *UD = dyn_cast<UsingDecl>(Other)) {
return isInstantiationOf(UUD, UD, Ctx);
}
}
if (UnresolvedUsingValueDecl *UUD
= dyn_cast<UnresolvedUsingValueDecl>(D)) {
if (UsingDecl *UD = dyn_cast<UsingDecl>(Other)) {
return isInstantiationOf(UUD, UD, Ctx);
}
}
return false;
}
if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(Other))
return isInstantiationOf(cast<CXXRecordDecl>(D), Record);
if (FunctionDecl *Function = dyn_cast<FunctionDecl>(Other))
return isInstantiationOf(cast<FunctionDecl>(D), Function);
if (EnumDecl *Enum = dyn_cast<EnumDecl>(Other))
return isInstantiationOf(cast<EnumDecl>(D), Enum);
if (VarDecl *Var = dyn_cast<VarDecl>(Other))
if (Var->isStaticDataMember())
return isInstantiationOfStaticDataMember(cast<VarDecl>(D), Var);
if (ClassTemplateDecl *Temp = dyn_cast<ClassTemplateDecl>(Other))
return isInstantiationOf(cast<ClassTemplateDecl>(D), Temp);
if (FunctionTemplateDecl *Temp = dyn_cast<FunctionTemplateDecl>(Other))
return isInstantiationOf(cast<FunctionTemplateDecl>(D), Temp);
if (ClassTemplatePartialSpecializationDecl *PartialSpec
= dyn_cast<ClassTemplatePartialSpecializationDecl>(Other))
return isInstantiationOf(cast<ClassTemplatePartialSpecializationDecl>(D),
PartialSpec);
if (FieldDecl *Field = dyn_cast<FieldDecl>(Other)) {
if (!Field->getDeclName()) {
// This is an unnamed field.
return Ctx.getInstantiatedFromUnnamedFieldDecl(Field) ==
cast<FieldDecl>(D);
}
}
if (UsingDecl *Using = dyn_cast<UsingDecl>(Other))
return isInstantiationOf(cast<UsingDecl>(D), Using, Ctx);
if (UsingShadowDecl *Shadow = dyn_cast<UsingShadowDecl>(Other))
return isInstantiationOf(cast<UsingShadowDecl>(D), Shadow, Ctx);
return D->getDeclName() && isa<NamedDecl>(Other) &&
D->getDeclName() == cast<NamedDecl>(Other)->getDeclName();
}
template<typename ForwardIterator>
static NamedDecl *findInstantiationOf(ASTContext &Ctx,
NamedDecl *D,
ForwardIterator first,
ForwardIterator last) {
for (; first != last; ++first)
if (isInstantiationOf(Ctx, D, *first))
return cast<NamedDecl>(*first);
return 0;
}
/// \brief Finds the instantiation of the given declaration context
/// within the current instantiation.
///
/// \returns NULL if there was an error
DeclContext *Sema::FindInstantiatedContext(SourceLocation Loc, DeclContext* DC,
const MultiLevelTemplateArgumentList &TemplateArgs) {
if (NamedDecl *D = dyn_cast<NamedDecl>(DC)) {
Decl* ID = FindInstantiatedDecl(Loc, D, TemplateArgs);
return cast_or_null<DeclContext>(ID);
} else return DC;
}
/// \brief Find the instantiation of the given declaration within the
/// current instantiation.
///
/// This routine is intended to be used when \p D is a declaration
/// referenced from within a template, that needs to mapped into the
/// corresponding declaration within an instantiation. For example,
/// given:
///
/// \code
/// template<typename T>
/// struct X {
/// enum Kind {
/// KnownValue = sizeof(T)
/// };
///
/// bool getKind() const { return KnownValue; }
/// };
///
/// template struct X<int>;
/// \endcode
///
/// In the instantiation of X<int>::getKind(), we need to map the
/// EnumConstantDecl for KnownValue (which refers to
/// X<T>::<Kind>::KnownValue) to its instantiation
/// (X<int>::<Kind>::KnownValue). InstantiateCurrentDeclRef() performs
/// this mapping from within the instantiation of X<int>.
NamedDecl *Sema::FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D,
const MultiLevelTemplateArgumentList &TemplateArgs) {
DeclContext *ParentDC = D->getDeclContext();
if (isa<ParmVarDecl>(D) || isa<NonTypeTemplateParmDecl>(D) ||
isa<TemplateTypeParmDecl>(D) || isa<TemplateTemplateParmDecl>(D) ||
(ParentDC->isFunctionOrMethod() && ParentDC->isDependentContext()) ||
(isa<CXXRecordDecl>(D) && cast<CXXRecordDecl>(D)->isLambda())) {
// D is a local of some kind. Look into the map of local
// declarations to their instantiations.
typedef LocalInstantiationScope::DeclArgumentPack DeclArgumentPack;
llvm::PointerUnion<Decl *, DeclArgumentPack *> *Found
= CurrentInstantiationScope->findInstantiationOf(D);
if (Found) {
if (Decl *FD = Found->dyn_cast<Decl *>())
return cast<NamedDecl>(FD);
unsigned PackIdx = ArgumentPackSubstitutionIndex;
return cast<NamedDecl>((*Found->get<DeclArgumentPack *>())[PackIdx]);
}
// If we didn't find the decl, then we must have a label decl that hasn't
// been found yet. Lazily instantiate it and return it now.
assert(isa<LabelDecl>(D));
Decl *Inst = SubstDecl(D, CurContext, TemplateArgs);
assert(Inst && "Failed to instantiate label??");
CurrentInstantiationScope->InstantiatedLocal(D, Inst);
return cast<LabelDecl>(Inst);
}
if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(D)) {
if (!Record->isDependentContext())
return D;
// Determine whether this record is the "templated" declaration describing
// a class template or class template partial specialization.
ClassTemplateDecl *ClassTemplate = Record->getDescribedClassTemplate();
if (ClassTemplate)
ClassTemplate = ClassTemplate->getCanonicalDecl();
else if (ClassTemplatePartialSpecializationDecl *PartialSpec
= dyn_cast<ClassTemplatePartialSpecializationDecl>(Record))
ClassTemplate = PartialSpec->getSpecializedTemplate()->getCanonicalDecl();
// Walk the current context to find either the record or an instantiation of
// it.
DeclContext *DC = CurContext;
while (!DC->isFileContext()) {
// If we're performing substitution while we're inside the template
// definition, we'll find our own context. We're done.
if (DC->Equals(Record))
return Record;
if (CXXRecordDecl *InstRecord = dyn_cast<CXXRecordDecl>(DC)) {
// Check whether we're in the process of instantiating a class template
// specialization of the template we're mapping.
if (ClassTemplateSpecializationDecl *InstSpec
= dyn_cast<ClassTemplateSpecializationDecl>(InstRecord)){
ClassTemplateDecl *SpecTemplate = InstSpec->getSpecializedTemplate();
if (ClassTemplate && isInstantiationOf(ClassTemplate, SpecTemplate))
return InstRecord;
}
// Check whether we're in the process of instantiating a member class.
if (isInstantiationOf(Record, InstRecord))
return InstRecord;
}
// Move to the outer template scope.
if (FunctionDecl *FD = dyn_cast<FunctionDecl>(DC)) {
if (FD->getFriendObjectKind() && FD->getDeclContext()->isFileContext()){
DC = FD->getLexicalDeclContext();
continue;
}
}
DC = DC->getParent();
}
// Fall through to deal with other dependent record types (e.g.,
// anonymous unions in class templates).
}
if (!ParentDC->isDependentContext())
return D;
ParentDC = FindInstantiatedContext(Loc, ParentDC, TemplateArgs);
if (!ParentDC)
return 0;
if (ParentDC != D->getDeclContext()) {
// We performed some kind of instantiation in the parent context,
// so now we need to look into the instantiated parent context to
// find the instantiation of the declaration D.
// If our context used to be dependent, we may need to instantiate
// it before performing lookup into that context.
bool IsBeingInstantiated = false;
if (CXXRecordDecl *Spec = dyn_cast<CXXRecordDecl>(ParentDC)) {
if (!Spec->isDependentContext()) {
QualType T = Context.getTypeDeclType(Spec);
const RecordType *Tag = T->getAs<RecordType>();
assert(Tag && "type of non-dependent record is not a RecordType");
if (Tag->isBeingDefined())
IsBeingInstantiated = true;
if (!Tag->isBeingDefined() &&
RequireCompleteType(Loc, T, diag::err_incomplete_type))
return 0;
ParentDC = Tag->getDecl();
}
}
NamedDecl *Result = 0;
if (D->getDeclName()) {
DeclContext::lookup_result Found = ParentDC->lookup(D->getDeclName());
Result = findInstantiationOf(Context, D, Found.first, Found.second);
} else {
// Since we don't have a name for the entity we're looking for,
// our only option is to walk through all of the declarations to
// find that name. This will occur in a few cases:
//
// - anonymous struct/union within a template
// - unnamed class/struct/union/enum within a template
//
// FIXME: Find a better way to find these instantiations!
Result = findInstantiationOf(Context, D,
ParentDC->decls_begin(),
ParentDC->decls_end());
}
if (!Result) {
if (isa<UsingShadowDecl>(D)) {
// UsingShadowDecls can instantiate to nothing because of using hiding.
} else if (Diags.hasErrorOccurred()) {
// We've already complained about something, so most likely this
// declaration failed to instantiate. There's no point in complaining
// further, since this is normal in invalid code.
} else if (IsBeingInstantiated) {
// The class in which this member exists is currently being
// instantiated, and we haven't gotten around to instantiating this
// member yet. This can happen when the code uses forward declarations
// of member classes, and introduces ordering dependencies via
// template instantiation.
Diag(Loc, diag::err_member_not_yet_instantiated)
<< D->getDeclName()
<< Context.getTypeDeclType(cast<CXXRecordDecl>(ParentDC));
Diag(D->getLocation(), diag::note_non_instantiated_member_here);
} else if (EnumConstantDecl *ED = dyn_cast<EnumConstantDecl>(D)) {
// This enumeration constant was found when the template was defined,
// but can't be found in the instantiation. This can happen if an
// unscoped enumeration member is explicitly specialized.
EnumDecl *Enum = cast<EnumDecl>(ED->getLexicalDeclContext());
EnumDecl *Spec = cast<EnumDecl>(FindInstantiatedDecl(Loc, Enum,
TemplateArgs));
assert(Spec->getTemplateSpecializationKind() ==
TSK_ExplicitSpecialization);
Diag(Loc, diag::err_enumerator_does_not_exist)
<< D->getDeclName()
<< Context.getTypeDeclType(cast<TypeDecl>(Spec->getDeclContext()));
Diag(Spec->getLocation(), diag::note_enum_specialized_here)
<< Context.getTypeDeclType(Spec);
} else {
// We should have found something, but didn't.
llvm_unreachable("Unable to find instantiation of declaration!");
}
}
D = Result;
}
return D;
}
/// \brief Performs template instantiation for all implicit template
/// instantiations we have seen until this point.
void Sema::PerformPendingInstantiations(bool LocalOnly) {
// Load pending instantiations from the external source.
if (!LocalOnly && ExternalSource) {
SmallVector<std::pair<ValueDecl *, SourceLocation>, 4> Pending;
ExternalSource->ReadPendingInstantiations(Pending);
PendingInstantiations.insert(PendingInstantiations.begin(),
Pending.begin(), Pending.end());
}
while (!PendingLocalImplicitInstantiations.empty() ||
(!LocalOnly && !PendingInstantiations.empty())) {
PendingImplicitInstantiation Inst;
if (PendingLocalImplicitInstantiations.empty()) {
Inst = PendingInstantiations.front();
PendingInstantiations.pop_front();
} else {
Inst = PendingLocalImplicitInstantiations.front();
PendingLocalImplicitInstantiations.pop_front();
}
// Instantiate function definitions
if (FunctionDecl *Function = dyn_cast<FunctionDecl>(Inst.first)) {
PrettyDeclStackTraceEntry CrashInfo(*this, Function, SourceLocation(),
"instantiating function definition");
bool DefinitionRequired = Function->getTemplateSpecializationKind() ==
TSK_ExplicitInstantiationDefinition;
InstantiateFunctionDefinition(/*FIXME:*/Inst.second, Function, true,
DefinitionRequired);
continue;
}
// Instantiate static data member definitions.
VarDecl *Var = cast<VarDecl>(Inst.first);
assert(Var->isStaticDataMember() && "Not a static data member?");
// Don't try to instantiate declarations if the most recent redeclaration
// is invalid.
if (Var->getMostRecentDecl()->isInvalidDecl())
continue;
// Check if the most recent declaration has changed the specialization kind
// and removed the need for implicit instantiation.
switch (Var->getMostRecentDecl()->getTemplateSpecializationKind()) {
case TSK_Undeclared:
llvm_unreachable("Cannot instantitiate an undeclared specialization.");
case TSK_ExplicitInstantiationDeclaration:
case TSK_ExplicitSpecialization:
continue; // No longer need to instantiate this type.
case TSK_ExplicitInstantiationDefinition:
// We only need an instantiation if the pending instantiation *is* the
// explicit instantiation.
if (Var != Var->getMostRecentDecl()) continue;
case TSK_ImplicitInstantiation:
break;
}
PrettyDeclStackTraceEntry CrashInfo(*this, Var, Var->getLocation(),
"instantiating static data member "
"definition");
bool DefinitionRequired = Var->getTemplateSpecializationKind() ==
TSK_ExplicitInstantiationDefinition;
InstantiateStaticDataMemberDefinition(/*FIXME:*/Inst.second, Var, true,
DefinitionRequired);
}
}
void Sema::PerformDependentDiagnostics(const DeclContext *Pattern,
const MultiLevelTemplateArgumentList &TemplateArgs) {
for (DeclContext::ddiag_iterator I = Pattern->ddiag_begin(),
E = Pattern->ddiag_end(); I != E; ++I) {
DependentDiagnostic *DD = *I;
switch (DD->getKind()) {
case DependentDiagnostic::Access:
HandleDependentAccessCheck(*DD, TemplateArgs);
break;
}
}
}
Reference in New Issue View Git Blame Copy Permalink