//===--- DeclTemplate.cpp - Template Declaration AST Node Implementation --===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the C++ related Decl classes for templates.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/ASTMutationListener.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/Expr.h"
#include "clang/AST/ExprCXX.h"
#include "clang/AST/TypeLoc.h"
#include "clang/Basic/IdentifierTable.h"
#include "llvm/ADT/STLExtras.h"
#include <memory>
using namespace clang;
//===----------------------------------------------------------------------===//
// TemplateParameterList Implementation
//===----------------------------------------------------------------------===//
TemplateParameterList::TemplateParameterList(SourceLocation TemplateLoc,
SourceLocation LAngleLoc,
NamedDecl **Params, unsigned NumParams,
SourceLocation RAngleLoc)
: TemplateLoc(TemplateLoc), LAngleLoc(LAngleLoc), RAngleLoc(RAngleLoc),
NumParams(NumParams), ContainsUnexpandedParameterPack(false) {
assert(this->NumParams == NumParams && "Too many template parameters");
for (unsigned Idx = 0; Idx < NumParams; ++Idx) {
NamedDecl *P = Params[Idx];
begin()[Idx] = P;
if (!P->isTemplateParameterPack()) {
if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(P))
if (NTTP->getType()->containsUnexpandedParameterPack())
ContainsUnexpandedParameterPack = true;
if (TemplateTemplateParmDecl *TTP = dyn_cast<TemplateTemplateParmDecl>(P))
if (TTP->getTemplateParameters()->containsUnexpandedParameterPack())
ContainsUnexpandedParameterPack = true;
// FIXME: If a default argument contains an unexpanded parameter pack, the
// template parameter list does too.
}
}
}
TemplateParameterList *
TemplateParameterList::Create(const ASTContext &C, SourceLocation TemplateLoc,
SourceLocation LAngleLoc, NamedDecl **Params,
unsigned NumParams, SourceLocation RAngleLoc) {
unsigned Size = sizeof(TemplateParameterList)
+ sizeof(NamedDecl *) * NumParams;
unsigned Align = std::max(llvm::alignOf<TemplateParameterList>(),
llvm::alignOf<NamedDecl*>());
void *Mem = C.Allocate(Size, Align);
return new (Mem) TemplateParameterList(TemplateLoc, LAngleLoc, Params,
NumParams, RAngleLoc);
}
unsigned TemplateParameterList::getMinRequiredArguments() const {
unsigned NumRequiredArgs = 0;
for (iterator P = const_cast<TemplateParameterList *>(this)->begin(),
PEnd = const_cast<TemplateParameterList *>(this)->end();
P != PEnd; ++P) {
if ((*P)->isTemplateParameterPack()) {
if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P))
if (NTTP->isExpandedParameterPack()) {
NumRequiredArgs += NTTP->getNumExpansionTypes();
continue;
}
break;
}
if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) {
if (TTP->hasDefaultArgument())
break;
} else if (NonTypeTemplateParmDecl *NTTP
= dyn_cast<NonTypeTemplateParmDecl>(*P)) {
if (NTTP->hasDefaultArgument())
break;
} else if (cast<TemplateTemplateParmDecl>(*P)->hasDefaultArgument())
break;
++NumRequiredArgs;
}
return NumRequiredArgs;
}
unsigned TemplateParameterList::getDepth() const {
if (size() == 0)
return 0;
const NamedDecl *FirstParm = getParam(0);
if (const TemplateTypeParmDecl *TTP
= dyn_cast<TemplateTypeParmDecl>(FirstParm))
return TTP->getDepth();
else if (const NonTypeTemplateParmDecl *NTTP
= dyn_cast<NonTypeTemplateParmDecl>(FirstParm))
return NTTP->getDepth();
else
return cast<TemplateTemplateParmDecl>(FirstParm)->getDepth();
}
static void AdoptTemplateParameterList(TemplateParameterList *Params,
DeclContext *Owner) {
for (TemplateParameterList::iterator P = Params->begin(),
PEnd = Params->end();
P != PEnd; ++P) {
(*P)->setDeclContext(Owner);
if (TemplateTemplateParmDecl *TTP = dyn_cast<TemplateTemplateParmDecl>(*P))
AdoptTemplateParameterList(TTP->getTemplateParameters(), Owner);
}
}
//===----------------------------------------------------------------------===//
// RedeclarableTemplateDecl Implementation
//===----------------------------------------------------------------------===//
RedeclarableTemplateDecl::CommonBase *RedeclarableTemplateDecl::getCommonPtr() const {
if (Common)
return Common;
// Walk the previous-declaration chain until we either find a declaration
// with a common pointer or we run out of previous declarations.
SmallVector<const RedeclarableTemplateDecl *, 2> PrevDecls;
for (const RedeclarableTemplateDecl *Prev = getPreviousDecl(); Prev;
Prev = Prev->getPreviousDecl()) {
if (Prev->Common) {
Common = Prev->Common;
break;
}
PrevDecls.push_back(Prev);
}
// If we never found a common pointer, allocate one now.
if (!Common) {
// FIXME: If any of the declarations is from an AST file, we probably
// need an update record to add the common data.
Common = newCommon(getASTContext());
}
// Update any previous declarations we saw with the common pointer.
for (unsigned I = 0, N = PrevDecls.size(); I != N; ++I)
PrevDecls[I]->Common = Common;
return Common;
}
template <class EntryType>
typename RedeclarableTemplateDecl::SpecEntryTraits<EntryType>::DeclType*
RedeclarableTemplateDecl::findSpecializationImpl(
llvm::FoldingSetVector<EntryType> &Specs,
ArrayRef<TemplateArgument> Args,
void *&InsertPos) {
typedef SpecEntryTraits<EntryType> SETraits;
llvm::FoldingSetNodeID ID;
EntryType::Profile(ID,Args, getASTContext());
EntryType *Entry = Specs.FindNodeOrInsertPos(ID, InsertPos);
return Entry ? SETraits::getMostRecentDecl(Entry) : nullptr;
}
/// \brief Generate the injected template arguments for the given template
/// parameter list, e.g., for the injected-class-name of a class template.
static void GenerateInjectedTemplateArgs(ASTContext &Context,
TemplateParameterList *Params,
TemplateArgument *Args) {
for (TemplateParameterList::iterator Param = Params->begin(),
ParamEnd = Params->end();
Param != ParamEnd; ++Param) {
TemplateArgument Arg;
if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*Param)) {
QualType ArgType = Context.getTypeDeclType(TTP);
if (TTP->isParameterPack())
ArgType = Context.getPackExpansionType(ArgType, None);
Arg = TemplateArgument(ArgType);
} else if (NonTypeTemplateParmDecl *NTTP =
dyn_cast<NonTypeTemplateParmDecl>(*Param)) {
Expr *E = new (Context) DeclRefExpr(NTTP, /*enclosing*/ false,
NTTP->getType().getNonLValueExprType(Context),
Expr::getValueKindForType(NTTP->getType()),
NTTP->getLocation());
if (NTTP->isParameterPack())
E = new (Context) PackExpansionExpr(Context.DependentTy, E,
NTTP->getLocation(), None);
Arg = TemplateArgument(E);
} else {
TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*Param);
if (TTP->isParameterPack())
Arg = TemplateArgument(TemplateName(TTP), Optional<unsigned>());
else
Arg = TemplateArgument(TemplateName(TTP));
}
if ((*Param)->isTemplateParameterPack())
Arg = TemplateArgument::CreatePackCopy(Context, &Arg, 1);
*Args++ = Arg;
}
}
//===----------------------------------------------------------------------===//
// FunctionTemplateDecl Implementation
//===----------------------------------------------------------------------===//
void FunctionTemplateDecl::DeallocateCommon(void *Ptr) {
static_cast<Common *>(Ptr)->~Common();
}
FunctionTemplateDecl *FunctionTemplateDecl::Create(ASTContext &C,
DeclContext *DC,
SourceLocation L,
DeclarationName Name,
TemplateParameterList *Params,
NamedDecl *Decl) {
AdoptTemplateParameterList(Params, cast<DeclContext>(Decl));
return new (C, DC) FunctionTemplateDecl(C, DC, L, Name, Params, Decl);
}
FunctionTemplateDecl *FunctionTemplateDecl::CreateDeserialized(ASTContext &C,
unsigned ID) {
return new (C, ID) FunctionTemplateDecl(C, nullptr, SourceLocation(),
DeclarationName(), nullptr, nullptr);
}
RedeclarableTemplateDecl::CommonBase *
FunctionTemplateDecl::newCommon(ASTContext &C) const {
Common *CommonPtr = new (C) Common;
C.AddDeallocation(DeallocateCommon, CommonPtr);
return CommonPtr;
}
void FunctionTemplateDecl::LoadLazySpecializations() const {
Common *CommonPtr = getCommonPtr();
if (CommonPtr->LazySpecializations) {
ASTContext &Context = getASTContext();
uint32_t *Specs = CommonPtr->LazySpecializations;
CommonPtr->LazySpecializations = nullptr;
for (uint32_t I = 0, N = *Specs++; I != N; ++I)
(void)Context.getExternalSource()->GetExternalDecl(Specs[I]);
}
}
llvm::FoldingSetVector<FunctionTemplateSpecializationInfo> &
FunctionTemplateDecl::getSpecializations() const {
LoadLazySpecializations();
return getCommonPtr()->Specializations;
}
FunctionDecl *
FunctionTemplateDecl::findSpecialization(ArrayRef<TemplateArgument> Args,
void *&InsertPos) {
return findSpecializationImpl(getSpecializations(), Args, InsertPos);
}
void FunctionTemplateDecl::addSpecialization(
FunctionTemplateSpecializationInfo *Info, void *InsertPos) {
if (InsertPos)
getSpecializations().InsertNode(Info, InsertPos);
else
getSpecializations().GetOrInsertNode(Info);
if (ASTMutationListener *L = getASTMutationListener())
L->AddedCXXTemplateSpecialization(this, Info->Function);
}
ArrayRef<TemplateArgument> FunctionTemplateDecl::getInjectedTemplateArgs() {
TemplateParameterList *Params = getTemplateParameters();
Common *CommonPtr = getCommonPtr();
if (!CommonPtr->InjectedArgs) {
CommonPtr->InjectedArgs
= new (getASTContext()) TemplateArgument[Params->size()];
GenerateInjectedTemplateArgs(getASTContext(), Params,
CommonPtr->InjectedArgs);
}
return llvm::makeArrayRef(CommonPtr->InjectedArgs, Params->size());
}
//===----------------------------------------------------------------------===//
// ClassTemplateDecl Implementation
//===----------------------------------------------------------------------===//
void ClassTemplateDecl::DeallocateCommon(void *Ptr) {
static_cast<Common *>(Ptr)->~Common();
}
ClassTemplateDecl *ClassTemplateDecl::Create(ASTContext &C,
DeclContext *DC,
SourceLocation L,
DeclarationName Name,
TemplateParameterList *Params,
NamedDecl *Decl,
ClassTemplateDecl *PrevDecl) {
AdoptTemplateParameterList(Params, cast<DeclContext>(Decl));
ClassTemplateDecl *New = new (C, DC) ClassTemplateDecl(C, DC, L, Name,
Params, Decl);
New->setPreviousDecl(PrevDecl);
return New;
}
ClassTemplateDecl *ClassTemplateDecl::CreateDeserialized(ASTContext &C,
unsigned ID) {
return new (C, ID) ClassTemplateDecl(C, nullptr, SourceLocation(),
DeclarationName(), nullptr, nullptr);
}
void ClassTemplateDecl::LoadLazySpecializations() const {
Common *CommonPtr = getCommonPtr();
if (CommonPtr->LazySpecializations) {
ASTContext &Context = getASTContext();
uint32_t *Specs = CommonPtr->LazySpecializations;
CommonPtr->LazySpecializations = nullptr;
for (uint32_t I = 0, N = *Specs++; I != N; ++I)
(void)Context.getExternalSource()->GetExternalDecl(Specs[I]);
}
}
llvm::FoldingSetVector<ClassTemplateSpecializationDecl> &
ClassTemplateDecl::getSpecializations() const {
LoadLazySpecializations();
return getCommonPtr()->Specializations;
}
llvm::FoldingSetVector<ClassTemplatePartialSpecializationDecl> &
ClassTemplateDecl::getPartialSpecializations() {
LoadLazySpecializations();
return getCommonPtr()->PartialSpecializations;
}
RedeclarableTemplateDecl::CommonBase *
ClassTemplateDecl::newCommon(ASTContext &C) const {
Common *CommonPtr = new (C) Common;
C.AddDeallocation(DeallocateCommon, CommonPtr);
return CommonPtr;
}
ClassTemplateSpecializationDecl *
ClassTemplateDecl::findSpecialization(ArrayRef<TemplateArgument> Args,
void *&InsertPos) {
return findSpecializationImpl(getSpecializations(), Args, InsertPos);
}
void ClassTemplateDecl::AddSpecialization(ClassTemplateSpecializationDecl *D,
void *InsertPos) {
if (InsertPos)
getSpecializations().InsertNode(D, InsertPos);
else {
ClassTemplateSpecializationDecl *Existing
= getSpecializations().GetOrInsertNode(D);
(void)Existing;
assert(Existing->isCanonicalDecl() && "Non-canonical specialization?");
}
if (ASTMutationListener *L = getASTMutationListener())
L->AddedCXXTemplateSpecialization(this, D);
}
ClassTemplatePartialSpecializationDecl *
ClassTemplateDecl::findPartialSpecialization(ArrayRef<TemplateArgument> Args,
void *&InsertPos) {
return findSpecializationImpl(getPartialSpecializations(), Args, InsertPos);
}
void ClassTemplateDecl::AddPartialSpecialization(
ClassTemplatePartialSpecializationDecl *D,
void *InsertPos) {
if (InsertPos)
getPartialSpecializations().InsertNode(D, InsertPos);
else {
ClassTemplatePartialSpecializationDecl *Existing
= getPartialSpecializations().GetOrInsertNode(D);
(void)Existing;
assert(Existing->isCanonicalDecl() && "Non-canonical specialization?");
}
if (ASTMutationListener *L = getASTMutationListener())
L->AddedCXXTemplateSpecialization(this, D);
}
void ClassTemplateDecl::getPartialSpecializations(
SmallVectorImpl<ClassTemplatePartialSpecializationDecl *> &PS) {
llvm::FoldingSetVector<ClassTemplatePartialSpecializationDecl> &PartialSpecs
= getPartialSpecializations();
PS.clear();
PS.reserve(PartialSpecs.size());
for (llvm::FoldingSetVector<ClassTemplatePartialSpecializationDecl>::iterator
P = PartialSpecs.begin(), PEnd = PartialSpecs.end();
P != PEnd; ++P)
PS.push_back(P->getMostRecentDecl());
}
ClassTemplatePartialSpecializationDecl *
ClassTemplateDecl::findPartialSpecialization(QualType T) {
ASTContext &Context = getASTContext();
using llvm::FoldingSetVector;
typedef FoldingSetVector<ClassTemplatePartialSpecializationDecl>::iterator
partial_spec_iterator;
for (partial_spec_iterator P = getPartialSpecializations().begin(),
PEnd = getPartialSpecializations().end();
P != PEnd; ++P) {
if (Context.hasSameType(P->getInjectedSpecializationType(), T))
return P->getMostRecentDecl();
}
return nullptr;
}
ClassTemplatePartialSpecializationDecl *
ClassTemplateDecl::findPartialSpecInstantiatedFromMember(
ClassTemplatePartialSpecializationDecl *D) {
Decl *DCanon = D->getCanonicalDecl();
for (llvm::FoldingSetVector<ClassTemplatePartialSpecializationDecl>::iterator
P = getPartialSpecializations().begin(),
PEnd = getPartialSpecializations().end();
P != PEnd; ++P) {
if (P->getInstantiatedFromMember()->getCanonicalDecl() == DCanon)
return P->getMostRecentDecl();
}
return nullptr;
}
QualType
ClassTemplateDecl::getInjectedClassNameSpecialization() {
Common *CommonPtr = getCommonPtr();
if (!CommonPtr->InjectedClassNameType.isNull())
return CommonPtr->InjectedClassNameType;
// C++0x [temp.dep.type]p2:
// The template argument list of a primary template is a template argument
// list in which the nth template argument has the value of the nth template
// parameter of the class template. If the nth template parameter is a
// template parameter pack (14.5.3), the nth template argument is a pack
// expansion (14.5.3) whose pattern is the name of the template parameter
// pack.
ASTContext &Context = getASTContext();
TemplateParameterList *Params = getTemplateParameters();
SmallVector<TemplateArgument, 16> TemplateArgs;
TemplateArgs.resize(Params->size());
GenerateInjectedTemplateArgs(getASTContext(), Params, TemplateArgs.data());
CommonPtr->InjectedClassNameType
= Context.getTemplateSpecializationType(TemplateName(this),
&TemplateArgs[0],
TemplateArgs.size());
return CommonPtr->InjectedClassNameType;
}
//===----------------------------------------------------------------------===//
// TemplateTypeParm Allocation/Deallocation Method Implementations
//===----------------------------------------------------------------------===//
TemplateTypeParmDecl *
TemplateTypeParmDecl::Create(const ASTContext &C, DeclContext *DC,
SourceLocation KeyLoc, SourceLocation NameLoc,
unsigned D, unsigned P, IdentifierInfo *Id,
bool Typename, bool ParameterPack) {
TemplateTypeParmDecl *TTPDecl =
new (C, DC) TemplateTypeParmDecl(DC, KeyLoc, NameLoc, Id, Typename);
QualType TTPType = C.getTemplateTypeParmType(D, P, ParameterPack, TTPDecl);
TTPDecl->setTypeForDecl(TTPType.getTypePtr());
return TTPDecl;
}
TemplateTypeParmDecl *
TemplateTypeParmDecl::CreateDeserialized(const ASTContext &C, unsigned ID) {
return new (C, ID) TemplateTypeParmDecl(nullptr, SourceLocation(),
SourceLocation(), nullptr, false);
}
SourceLocation TemplateTypeParmDecl::getDefaultArgumentLoc() const {
return hasDefaultArgument()
? DefaultArgument->getTypeLoc().getBeginLoc()
: SourceLocation();
}
SourceRange TemplateTypeParmDecl::getSourceRange() const {
if (hasDefaultArgument() && !defaultArgumentWasInherited())
return SourceRange(getLocStart(),
DefaultArgument->getTypeLoc().getEndLoc());
else
return TypeDecl::getSourceRange();
}
unsigned TemplateTypeParmDecl::getDepth() const {
return getTypeForDecl()->getAs<TemplateTypeParmType>()->getDepth();
}
unsigned TemplateTypeParmDecl::getIndex() const {
return getTypeForDecl()->getAs<TemplateTypeParmType>()->getIndex();
}
bool TemplateTypeParmDecl::isParameterPack() const {
return getTypeForDecl()->getAs<TemplateTypeParmType>()->isParameterPack();
}
//===----------------------------------------------------------------------===//
// NonTypeTemplateParmDecl Method Implementations
//===----------------------------------------------------------------------===//
NonTypeTemplateParmDecl::NonTypeTemplateParmDecl(DeclContext *DC,
SourceLocation StartLoc,
SourceLocation IdLoc,
unsigned D, unsigned P,
IdentifierInfo *Id,
QualType T,
TypeSourceInfo *TInfo,
const QualType *ExpandedTypes,
unsigned NumExpandedTypes,
TypeSourceInfo **ExpandedTInfos)
: DeclaratorDecl(NonTypeTemplateParm, DC, IdLoc, Id, T, TInfo, StartLoc),
TemplateParmPosition(D, P), DefaultArgumentAndInherited(nullptr, false),
ParameterPack(true), ExpandedParameterPack(true),
NumExpandedTypes(NumExpandedTypes)
{
if (ExpandedTypes && ExpandedTInfos) {
void **TypesAndInfos = reinterpret_cast<void **>(this + 1);
for (unsigned I = 0; I != NumExpandedTypes; ++I) {
TypesAndInfos[2*I] = ExpandedTypes[I].getAsOpaquePtr();
TypesAndInfos[2*I + 1] = ExpandedTInfos[I];
}
}
}
NonTypeTemplateParmDecl *
NonTypeTemplateParmDecl::Create(const ASTContext &C, DeclContext *DC,
SourceLocation StartLoc, SourceLocation IdLoc,
unsigned D, unsigned P, IdentifierInfo *Id,
QualType T, bool ParameterPack,
TypeSourceInfo *TInfo) {
return new (C, DC) NonTypeTemplateParmDecl(DC, StartLoc, IdLoc, D, P, Id,
T, ParameterPack, TInfo);
}
NonTypeTemplateParmDecl *
NonTypeTemplateParmDecl::Create(const ASTContext &C, DeclContext *DC,
SourceLocation StartLoc, SourceLocation IdLoc,
unsigned D, unsigned P,
IdentifierInfo *Id, QualType T,
TypeSourceInfo *TInfo,
const QualType *ExpandedTypes,
unsigned NumExpandedTypes,
TypeSourceInfo **ExpandedTInfos) {
unsigned Extra = NumExpandedTypes * 2 * sizeof(void*);
return new (C, DC, Extra) NonTypeTemplateParmDecl(
DC, StartLoc, IdLoc, D, P, Id, T, TInfo,
ExpandedTypes, NumExpandedTypes, ExpandedTInfos);
}
NonTypeTemplateParmDecl *
NonTypeTemplateParmDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) NonTypeTemplateParmDecl(nullptr, SourceLocation(),
SourceLocation(), 0, 0, nullptr,
QualType(), false, nullptr);
}
NonTypeTemplateParmDecl *
NonTypeTemplateParmDecl::CreateDeserialized(ASTContext &C, unsigned ID,
unsigned NumExpandedTypes) {
unsigned Extra = NumExpandedTypes * 2 * sizeof(void*);
return new (C, ID, Extra) NonTypeTemplateParmDecl(
nullptr, SourceLocation(), SourceLocation(), 0, 0, nullptr, QualType(),
nullptr, nullptr, NumExpandedTypes, nullptr);
}
SourceRange NonTypeTemplateParmDecl::getSourceRange() const {
if (hasDefaultArgument() && !defaultArgumentWasInherited())
return SourceRange(getOuterLocStart(),
getDefaultArgument()->getSourceRange().getEnd());
return DeclaratorDecl::getSourceRange();
}
SourceLocation NonTypeTemplateParmDecl::getDefaultArgumentLoc() const {
return hasDefaultArgument()
? getDefaultArgument()->getSourceRange().getBegin()
: SourceLocation();
}
//===----------------------------------------------------------------------===//
// TemplateTemplateParmDecl Method Implementations
//===----------------------------------------------------------------------===//
void TemplateTemplateParmDecl::anchor() { }
TemplateTemplateParmDecl::TemplateTemplateParmDecl(
DeclContext *DC, SourceLocation L, unsigned D, unsigned P,
IdentifierInfo *Id, TemplateParameterList *Params,
unsigned NumExpansions, TemplateParameterList * const *Expansions)
: TemplateDecl(TemplateTemplateParm, DC, L, Id, Params),
TemplateParmPosition(D, P), DefaultArgument(),
DefaultArgumentWasInherited(false), ParameterPack(true),
ExpandedParameterPack(true), NumExpandedParams(NumExpansions) {
if (Expansions)
std::memcpy(reinterpret_cast<void*>(this + 1), Expansions,
sizeof(TemplateParameterList*) * NumExpandedParams);
}
TemplateTemplateParmDecl *
TemplateTemplateParmDecl::Create(const ASTContext &C, DeclContext *DC,
SourceLocation L, unsigned D, unsigned P,
bool ParameterPack, IdentifierInfo *Id,
TemplateParameterList *Params) {
return new (C, DC) TemplateTemplateParmDecl(DC, L, D, P, ParameterPack, Id,
Params);
}
TemplateTemplateParmDecl *
TemplateTemplateParmDecl::Create(const ASTContext &C, DeclContext *DC,
SourceLocation L, unsigned D, unsigned P,
IdentifierInfo *Id,
TemplateParameterList *Params,
ArrayRef<TemplateParameterList *> Expansions) {
return new (C, DC, sizeof(TemplateParameterList*) * Expansions.size())
TemplateTemplateParmDecl(DC, L, D, P, Id, Params,
Expansions.size(), Expansions.data());
}
TemplateTemplateParmDecl *
TemplateTemplateParmDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) TemplateTemplateParmDecl(nullptr, SourceLocation(), 0, 0,
false, nullptr, nullptr);
}
TemplateTemplateParmDecl *
TemplateTemplateParmDecl::CreateDeserialized(ASTContext &C, unsigned ID,
unsigned NumExpansions) {
return new (C, ID, sizeof(TemplateParameterList*) * NumExpansions)
TemplateTemplateParmDecl(nullptr, SourceLocation(), 0, 0, nullptr,
nullptr, NumExpansions, nullptr);
}
//===----------------------------------------------------------------------===//
// TemplateArgumentList Implementation
//===----------------------------------------------------------------------===//
TemplateArgumentList *
TemplateArgumentList::CreateCopy(ASTContext &Context,
const TemplateArgument *Args,
unsigned NumArgs) {
std::size_t Size = sizeof(TemplateArgumentList)
+ NumArgs * sizeof(TemplateArgument);
void *Mem = Context.Allocate(Size);
TemplateArgument *StoredArgs
= reinterpret_cast<TemplateArgument *>(
static_cast<TemplateArgumentList *>(Mem) + 1);
std::uninitialized_copy(Args, Args + NumArgs, StoredArgs);
return new (Mem) TemplateArgumentList(StoredArgs, NumArgs, true);
}
FunctionTemplateSpecializationInfo *
FunctionTemplateSpecializationInfo::Create(ASTContext &C, FunctionDecl *FD,
FunctionTemplateDecl *Template,
TemplateSpecializationKind TSK,
const TemplateArgumentList *TemplateArgs,
const TemplateArgumentListInfo *TemplateArgsAsWritten,
SourceLocation POI) {
const ASTTemplateArgumentListInfo *ArgsAsWritten = nullptr;
if (TemplateArgsAsWritten)
ArgsAsWritten = ASTTemplateArgumentListInfo::Create(C,
*TemplateArgsAsWritten);
return new (C) FunctionTemplateSpecializationInfo(FD, Template, TSK,
TemplateArgs,
ArgsAsWritten,
POI);
}
//===----------------------------------------------------------------------===//
// TemplateDecl Implementation
//===----------------------------------------------------------------------===//
void TemplateDecl::anchor() { }
//===----------------------------------------------------------------------===//
// ClassTemplateSpecializationDecl Implementation
//===----------------------------------------------------------------------===//
ClassTemplateSpecializationDecl::
ClassTemplateSpecializationDecl(ASTContext &Context, Kind DK, TagKind TK,
DeclContext *DC, SourceLocation StartLoc,
SourceLocation IdLoc,
ClassTemplateDecl *SpecializedTemplate,
const TemplateArgument *Args,
unsigned NumArgs,
ClassTemplateSpecializationDecl *PrevDecl)
: CXXRecordDecl(DK, TK, Context, DC, StartLoc, IdLoc,
SpecializedTemplate->getIdentifier(),
PrevDecl),
SpecializedTemplate(SpecializedTemplate),
ExplicitInfo(nullptr),
TemplateArgs(TemplateArgumentList::CreateCopy(Context, Args, NumArgs)),
SpecializationKind(TSK_Undeclared) {
}
ClassTemplateSpecializationDecl::ClassTemplateSpecializationDecl(ASTContext &C,
Kind DK)
: CXXRecordDecl(DK, TTK_Struct, C, nullptr, SourceLocation(),
SourceLocation(), nullptr, nullptr),
ExplicitInfo(nullptr), SpecializationKind(TSK_Undeclared) {}
ClassTemplateSpecializationDecl *
ClassTemplateSpecializationDecl::Create(ASTContext &Context, TagKind TK,
DeclContext *DC,
SourceLocation StartLoc,
SourceLocation IdLoc,
ClassTemplateDecl *SpecializedTemplate,
const TemplateArgument *Args,
unsigned NumArgs,
ClassTemplateSpecializationDecl *PrevDecl) {
ClassTemplateSpecializationDecl *Result =
new (Context, DC) ClassTemplateSpecializationDecl(
Context, ClassTemplateSpecialization, TK, DC, StartLoc, IdLoc,
SpecializedTemplate, Args, NumArgs, PrevDecl);
Result->MayHaveOutOfDateDef = false;
Context.getTypeDeclType(Result, PrevDecl);
return Result;
}
ClassTemplateSpecializationDecl *
ClassTemplateSpecializationDecl::CreateDeserialized(ASTContext &C,
unsigned ID) {
ClassTemplateSpecializationDecl *Result =
new (C, ID) ClassTemplateSpecializationDecl(C, ClassTemplateSpecialization);
Result->MayHaveOutOfDateDef = false;
return Result;
}
void ClassTemplateSpecializationDecl::getNameForDiagnostic(
raw_ostream &OS, const PrintingPolicy &Policy, bool Qualified) const {
NamedDecl::getNameForDiagnostic(OS, Policy, Qualified);
const TemplateArgumentList &TemplateArgs = getTemplateArgs();
TemplateSpecializationType::PrintTemplateArgumentList(
OS, TemplateArgs.data(), TemplateArgs.size(), Policy);
}
ClassTemplateDecl *
ClassTemplateSpecializationDecl::getSpecializedTemplate() const {
if (SpecializedPartialSpecialization *PartialSpec
= SpecializedTemplate.dyn_cast<SpecializedPartialSpecialization*>())
return PartialSpec->PartialSpecialization->getSpecializedTemplate();
return SpecializedTemplate.get<ClassTemplateDecl*>();
}
SourceRange
ClassTemplateSpecializationDecl::getSourceRange() const {
if (ExplicitInfo) {
SourceLocation Begin = getTemplateKeywordLoc();
if (Begin.isValid()) {
// Here we have an explicit (partial) specialization or instantiation.
assert(getSpecializationKind() == TSK_ExplicitSpecialization ||
getSpecializationKind() == TSK_ExplicitInstantiationDeclaration ||
getSpecializationKind() == TSK_ExplicitInstantiationDefinition);
if (getExternLoc().isValid())
Begin = getExternLoc();
SourceLocation End = getRBraceLoc();
if (End.isInvalid())
End = getTypeAsWritten()->getTypeLoc().getEndLoc();
return SourceRange(Begin, End);
}
// An implicit instantiation of a class template partial specialization
// uses ExplicitInfo to record the TypeAsWritten, but the source
// locations should be retrieved from the instantiation pattern.
typedef ClassTemplatePartialSpecializationDecl CTPSDecl;
CTPSDecl *ctpsd = const_cast<CTPSDecl*>(cast<CTPSDecl>(this));
CTPSDecl *inst_from = ctpsd->getInstantiatedFromMember();
assert(inst_from != nullptr);
return inst_from->getSourceRange();
}
else {
// No explicit info available.
llvm::PointerUnion<ClassTemplateDecl *,
ClassTemplatePartialSpecializationDecl *>
inst_from = getInstantiatedFrom();
if (inst_from.isNull())
return getSpecializedTemplate()->getSourceRange();
if (ClassTemplateDecl *ctd = inst_from.dyn_cast<ClassTemplateDecl*>())
return ctd->getSourceRange();
return inst_from.get<ClassTemplatePartialSpecializationDecl*>()
->getSourceRange();
}
}
//===----------------------------------------------------------------------===//
// ClassTemplatePartialSpecializationDecl Implementation
//===----------------------------------------------------------------------===//
void ClassTemplatePartialSpecializationDecl::anchor() { }
ClassTemplatePartialSpecializationDecl::
ClassTemplatePartialSpecializationDecl(ASTContext &Context, TagKind TK,
DeclContext *DC,
SourceLocation StartLoc,
SourceLocation IdLoc,
TemplateParameterList *Params,
ClassTemplateDecl *SpecializedTemplate,
const TemplateArgument *Args,
unsigned NumArgs,
const ASTTemplateArgumentListInfo *ArgInfos,
ClassTemplatePartialSpecializationDecl *PrevDecl)
: ClassTemplateSpecializationDecl(Context,
ClassTemplatePartialSpecialization,
TK, DC, StartLoc, IdLoc,
SpecializedTemplate,
Args, NumArgs, PrevDecl),
TemplateParams(Params), ArgsAsWritten(ArgInfos),
InstantiatedFromMember(nullptr, false)
{
AdoptTemplateParameterList(Params, this);
}
ClassTemplatePartialSpecializationDecl *
ClassTemplatePartialSpecializationDecl::
Create(ASTContext &Context, TagKind TK,DeclContext *DC,
SourceLocation StartLoc, SourceLocation IdLoc,
TemplateParameterList *Params,
ClassTemplateDecl *SpecializedTemplate,
const TemplateArgument *Args,
unsigned NumArgs,
const TemplateArgumentListInfo &ArgInfos,
QualType CanonInjectedType,
ClassTemplatePartialSpecializationDecl *PrevDecl) {
const ASTTemplateArgumentListInfo *ASTArgInfos =
ASTTemplateArgumentListInfo::Create(Context, ArgInfos);
ClassTemplatePartialSpecializationDecl *Result = new (Context, DC)
ClassTemplatePartialSpecializationDecl(Context, TK, DC, StartLoc, IdLoc,
Params, SpecializedTemplate, Args,
NumArgs, ASTArgInfos, PrevDecl);
Result->setSpecializationKind(TSK_ExplicitSpecialization);
Result->MayHaveOutOfDateDef = false;
Context.getInjectedClassNameType(Result, CanonInjectedType);
return Result;
}
ClassTemplatePartialSpecializationDecl *
ClassTemplatePartialSpecializationDecl::CreateDeserialized(ASTContext &C,
unsigned ID) {
ClassTemplatePartialSpecializationDecl *Result =
new (C, ID) ClassTemplatePartialSpecializationDecl(C);
Result->MayHaveOutOfDateDef = false;
return Result;
}
//===----------------------------------------------------------------------===//
// FriendTemplateDecl Implementation
//===----------------------------------------------------------------------===//
void FriendTemplateDecl::anchor() { }
FriendTemplateDecl *FriendTemplateDecl::Create(ASTContext &Context,
DeclContext *DC,
SourceLocation L,
unsigned NParams,
TemplateParameterList **Params,
FriendUnion Friend,
SourceLocation FLoc) {
return new (Context, DC) FriendTemplateDecl(DC, L, NParams, Params,
Friend, FLoc);
}
FriendTemplateDecl *FriendTemplateDecl::CreateDeserialized(ASTContext &C,
unsigned ID) {
return new (C, ID) FriendTemplateDecl(EmptyShell());
}
//===----------------------------------------------------------------------===//
// TypeAliasTemplateDecl Implementation
//===----------------------------------------------------------------------===//
TypeAliasTemplateDecl *TypeAliasTemplateDecl::Create(ASTContext &C,
DeclContext *DC,
SourceLocation L,
DeclarationName Name,
TemplateParameterList *Params,
NamedDecl *Decl) {
AdoptTemplateParameterList(Params, DC);
return new (C, DC) TypeAliasTemplateDecl(C, DC, L, Name, Params, Decl);
}
TypeAliasTemplateDecl *TypeAliasTemplateDecl::CreateDeserialized(ASTContext &C,
unsigned ID) {
return new (C, ID) TypeAliasTemplateDecl(C, nullptr, SourceLocation(),
DeclarationName(), nullptr, nullptr);
}
void TypeAliasTemplateDecl::DeallocateCommon(void *Ptr) {
static_cast<Common *>(Ptr)->~Common();
}
RedeclarableTemplateDecl::CommonBase *
TypeAliasTemplateDecl::newCommon(ASTContext &C) const {
Common *CommonPtr = new (C) Common;
C.AddDeallocation(DeallocateCommon, CommonPtr);
return CommonPtr;
}
//===----------------------------------------------------------------------===//
// ClassScopeFunctionSpecializationDecl Implementation
//===----------------------------------------------------------------------===//
void ClassScopeFunctionSpecializationDecl::anchor() { }
ClassScopeFunctionSpecializationDecl *
ClassScopeFunctionSpecializationDecl::CreateDeserialized(ASTContext &C,
unsigned ID) {
return new (C, ID) ClassScopeFunctionSpecializationDecl(
nullptr, SourceLocation(), nullptr, false, TemplateArgumentListInfo());
}
//===----------------------------------------------------------------------===//
// VarTemplateDecl Implementation
//===----------------------------------------------------------------------===//
void VarTemplateDecl::DeallocateCommon(void *Ptr) {
static_cast<Common *>(Ptr)->~Common();
}
VarTemplateDecl *VarTemplateDecl::getDefinition() {
VarTemplateDecl *CurD = this;
while (CurD) {
if (CurD->isThisDeclarationADefinition())
return CurD;
CurD = CurD->getPreviousDecl();
}
return nullptr;
}
VarTemplateDecl *VarTemplateDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L, DeclarationName Name,
TemplateParameterList *Params,
VarDecl *Decl) {
return new (C, DC) VarTemplateDecl(C, DC, L, Name, Params, Decl);
}
VarTemplateDecl *VarTemplateDecl::CreateDeserialized(ASTContext &C,
unsigned ID) {
return new (C, ID) VarTemplateDecl(C, nullptr, SourceLocation(),
DeclarationName(), nullptr, nullptr);
}
// TODO: Unify across class, function and variable templates?
// May require moving this and Common to RedeclarableTemplateDecl.
void VarTemplateDecl::LoadLazySpecializations() const {
Common *CommonPtr = getCommonPtr();
if (CommonPtr->LazySpecializations) {
ASTContext &Context = getASTContext();
uint32_t *Specs = CommonPtr->LazySpecializations;
CommonPtr->LazySpecializations = nullptr;
for (uint32_t I = 0, N = *Specs++; I != N; ++I)
(void)Context.getExternalSource()->GetExternalDecl(Specs[I]);
}
}
llvm::FoldingSetVector<VarTemplateSpecializationDecl> &
VarTemplateDecl::getSpecializations() const {
LoadLazySpecializations();
return getCommonPtr()->Specializations;
}
llvm::FoldingSetVector<VarTemplatePartialSpecializationDecl> &
VarTemplateDecl::getPartialSpecializations() {
LoadLazySpecializations();
return getCommonPtr()->PartialSpecializations;
}
RedeclarableTemplateDecl::CommonBase *
VarTemplateDecl::newCommon(ASTContext &C) const {
Common *CommonPtr = new (C) Common;
C.AddDeallocation(DeallocateCommon, CommonPtr);
return CommonPtr;
}
VarTemplateSpecializationDecl *
VarTemplateDecl::findSpecialization(ArrayRef<TemplateArgument> Args,
void *&InsertPos) {
return findSpecializationImpl(getSpecializations(), Args, InsertPos);
}
void VarTemplateDecl::AddSpecialization(VarTemplateSpecializationDecl *D,
void *InsertPos) {
if (InsertPos)
getSpecializations().InsertNode(D, InsertPos);
else {
VarTemplateSpecializationDecl *Existing =
getSpecializations().GetOrInsertNode(D);
(void)Existing;
assert(Existing->isCanonicalDecl() && "Non-canonical specialization?");
}
if (ASTMutationListener *L = getASTMutationListener())
L->AddedCXXTemplateSpecialization(this, D);
}
VarTemplatePartialSpecializationDecl *
VarTemplateDecl::findPartialSpecialization(ArrayRef<TemplateArgument> Args,
void *&InsertPos) {
return findSpecializationImpl(getPartialSpecializations(), Args, InsertPos);
}
void VarTemplateDecl::AddPartialSpecialization(
VarTemplatePartialSpecializationDecl *D, void *InsertPos) {
if (InsertPos)
getPartialSpecializations().InsertNode(D, InsertPos);
else {
VarTemplatePartialSpecializationDecl *Existing =
getPartialSpecializations().GetOrInsertNode(D);
(void)Existing;
assert(Existing->isCanonicalDecl() && "Non-canonical specialization?");
}
if (ASTMutationListener *L = getASTMutationListener())
L->AddedCXXTemplateSpecialization(this, D);
}
void VarTemplateDecl::getPartialSpecializations(
SmallVectorImpl<VarTemplatePartialSpecializationDecl *> &PS) {
llvm::FoldingSetVector<VarTemplatePartialSpecializationDecl> &PartialSpecs =
getPartialSpecializations();
PS.clear();
PS.reserve(PartialSpecs.size());
for (llvm::FoldingSetVector<VarTemplatePartialSpecializationDecl>::iterator
P = PartialSpecs.begin(),
PEnd = PartialSpecs.end();
P != PEnd; ++P)
PS.push_back(P->getMostRecentDecl());
}
VarTemplatePartialSpecializationDecl *
VarTemplateDecl::findPartialSpecInstantiatedFromMember(
VarTemplatePartialSpecializationDecl *D) {
Decl *DCanon = D->getCanonicalDecl();
for (llvm::FoldingSetVector<VarTemplatePartialSpecializationDecl>::iterator
P = getPartialSpecializations().begin(),
PEnd = getPartialSpecializations().end();
P != PEnd; ++P) {
if (P->getInstantiatedFromMember()->getCanonicalDecl() == DCanon)
return P->getMostRecentDecl();
}
return nullptr;
}
//===----------------------------------------------------------------------===//
// VarTemplateSpecializationDecl Implementation
//===----------------------------------------------------------------------===//
VarTemplateSpecializationDecl::VarTemplateSpecializationDecl(
Kind DK, ASTContext &Context, DeclContext *DC, SourceLocation StartLoc,
SourceLocation IdLoc, VarTemplateDecl *SpecializedTemplate, QualType T,
TypeSourceInfo *TInfo, StorageClass S, const TemplateArgument *Args,
unsigned NumArgs)
: VarDecl(DK, Context, DC, StartLoc, IdLoc,
SpecializedTemplate->getIdentifier(), T, TInfo, S),
SpecializedTemplate(SpecializedTemplate), ExplicitInfo(nullptr),
TemplateArgs(TemplateArgumentList::CreateCopy(Context, Args, NumArgs)),
SpecializationKind(TSK_Undeclared) {}
VarTemplateSpecializationDecl::VarTemplateSpecializationDecl(Kind DK,
ASTContext &C)
: VarDecl(DK, C, nullptr, SourceLocation(), SourceLocation(), nullptr,
QualType(), nullptr, SC_None),
ExplicitInfo(nullptr), SpecializationKind(TSK_Undeclared) {}
VarTemplateSpecializationDecl *VarTemplateSpecializationDecl::Create(
ASTContext &Context, DeclContext *DC, SourceLocation StartLoc,
SourceLocation IdLoc, VarTemplateDecl *SpecializedTemplate, QualType T,
TypeSourceInfo *TInfo, StorageClass S, const TemplateArgument *Args,
unsigned NumArgs) {
return new (Context, DC) VarTemplateSpecializationDecl(
VarTemplateSpecialization, Context, DC, StartLoc, IdLoc,
SpecializedTemplate, T, TInfo, S, Args, NumArgs);
}
VarTemplateSpecializationDecl *
VarTemplateSpecializationDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID)
VarTemplateSpecializationDecl(VarTemplateSpecialization, C);
}
void VarTemplateSpecializationDecl::getNameForDiagnostic(
raw_ostream &OS, const PrintingPolicy &Policy, bool Qualified) const {
NamedDecl::getNameForDiagnostic(OS, Policy, Qualified);
const TemplateArgumentList &TemplateArgs = getTemplateArgs();
TemplateSpecializationType::PrintTemplateArgumentList(
OS, TemplateArgs.data(), TemplateArgs.size(), Policy);
}
VarTemplateDecl *VarTemplateSpecializationDecl::getSpecializedTemplate() const {
if (SpecializedPartialSpecialization *PartialSpec =
SpecializedTemplate.dyn_cast<SpecializedPartialSpecialization *>())
return PartialSpec->PartialSpecialization->getSpecializedTemplate();
return SpecializedTemplate.get<VarTemplateDecl *>();
}
void VarTemplateSpecializationDecl::setTemplateArgsInfo(
const TemplateArgumentListInfo &ArgsInfo) {
unsigned N = ArgsInfo.size();
TemplateArgsInfo.setLAngleLoc(ArgsInfo.getLAngleLoc());
TemplateArgsInfo.setRAngleLoc(ArgsInfo.getRAngleLoc());
for (unsigned I = 0; I != N; ++I)
TemplateArgsInfo.addArgument(ArgsInfo[I]);
}
//===----------------------------------------------------------------------===//
// VarTemplatePartialSpecializationDecl Implementation
//===----------------------------------------------------------------------===//
void VarTemplatePartialSpecializationDecl::anchor() {}
VarTemplatePartialSpecializationDecl::VarTemplatePartialSpecializationDecl(
ASTContext &Context, DeclContext *DC, SourceLocation StartLoc,
SourceLocation IdLoc, TemplateParameterList *Params,
VarTemplateDecl *SpecializedTemplate, QualType T, TypeSourceInfo *TInfo,
StorageClass S, const TemplateArgument *Args, unsigned NumArgs,
const ASTTemplateArgumentListInfo *ArgInfos)
: VarTemplateSpecializationDecl(VarTemplatePartialSpecialization, Context,
DC, StartLoc, IdLoc, SpecializedTemplate, T,
TInfo, S, Args, NumArgs),
TemplateParams(Params), ArgsAsWritten(ArgInfos),
InstantiatedFromMember(nullptr, false) {
// TODO: The template parameters should be in DC by now. Verify.
// AdoptTemplateParameterList(Params, DC);
}
VarTemplatePartialSpecializationDecl *
VarTemplatePartialSpecializationDecl::Create(
ASTContext &Context, DeclContext *DC, SourceLocation StartLoc,
SourceLocation IdLoc, TemplateParameterList *Params,
VarTemplateDecl *SpecializedTemplate, QualType T, TypeSourceInfo *TInfo,
StorageClass S, const TemplateArgument *Args, unsigned NumArgs,
const TemplateArgumentListInfo &ArgInfos) {
const ASTTemplateArgumentListInfo *ASTArgInfos
= ASTTemplateArgumentListInfo::Create(Context, ArgInfos);
VarTemplatePartialSpecializationDecl *Result =
new (Context, DC) VarTemplatePartialSpecializationDecl(
Context, DC, StartLoc, IdLoc, Params, SpecializedTemplate, T, TInfo,
S, Args, NumArgs, ASTArgInfos);
Result->setSpecializationKind(TSK_ExplicitSpecialization);
return Result;
}
VarTemplatePartialSpecializationDecl *
VarTemplatePartialSpecializationDecl::CreateDeserialized(ASTContext &C,
unsigned ID) {
return new (C, ID) VarTemplatePartialSpecializationDecl(C);
}