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//===-- DeclarationName.cpp - Declaration names implementation --*- C++ -*-===//
//
// 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 DeclarationName and DeclarationNameTable
// classes.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/DeclarationName.h"
#include "clang/Basic/IdentifierTable.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/Bitcode/Serialize.h"
#include "llvm/Bitcode/Deserialize.h"
using namespace clang;
namespace clang {
/// CXXSpecialName - Records the type associated with one of the
/// "special" kinds of declaration names in C++, e.g., constructors,
/// destructors, and conversion functions.
class CXXSpecialName
: public DeclarationNameExtra, public llvm::FoldingSetNode {
public:
QualType Type;
void Profile(llvm::FoldingSetNodeID &ID) {
ID.AddInteger(ExtraKindOrNumArgs);
ID.AddPointer(Type.getAsOpaquePtr());
}
};
bool operator<(DeclarationName LHS, DeclarationName RHS) {
if (IdentifierInfo *LhsId = LHS.getAsIdentifierInfo())
if (IdentifierInfo *RhsId = RHS.getAsIdentifierInfo())
return strcmp(LhsId->getName(), RhsId->getName()) < 0;
return LHS.getAsOpaqueInteger() < RHS.getAsOpaqueInteger();
}
} // end namespace clang
DeclarationName::DeclarationName(Selector Sel) {
switch (Sel.getNumArgs()) {
case 0:
Ptr = reinterpret_cast<uintptr_t>(Sel.getAsIdentifierInfo());
Ptr |= StoredObjCZeroArgSelector;
break;
case 1:
Ptr = reinterpret_cast<uintptr_t>(Sel.getAsIdentifierInfo());
Ptr |= StoredObjCOneArgSelector;
break;
default:
Ptr = Sel.InfoPtr & ~Selector::ArgFlags;
Ptr |= StoredObjCMultiArgSelectorOrCXXName;
break;
}
}
DeclarationName::NameKind DeclarationName::getNameKind() const {
switch (getStoredNameKind()) {
case StoredIdentifier: return Identifier;
case StoredObjCZeroArgSelector: return ObjCZeroArgSelector;
case StoredObjCOneArgSelector: return ObjCOneArgSelector;
case StoredObjCMultiArgSelectorOrCXXName:
switch (getExtra()->ExtraKindOrNumArgs) {
case DeclarationNameExtra::CXXConstructor:
return CXXConstructorName;
case DeclarationNameExtra::CXXDestructor:
return CXXDestructorName;
case DeclarationNameExtra::CXXConversionFunction:
return CXXConversionFunctionName;
default:
return ObjCMultiArgSelector;
}
break;
}
// Can't actually get here.
return Identifier;
}
QualType DeclarationName::getCXXNameType() const {
if (CXXSpecialName *CXXName = getAsCXXSpecialName())
return CXXName->Type;
else
return QualType();
}
Selector DeclarationName::getObjCSelector() const {
switch (getNameKind()) {
case ObjCZeroArgSelector:
return Selector(reinterpret_cast<IdentifierInfo *>(Ptr & ~PtrMask), 0);
case ObjCOneArgSelector:
return Selector(reinterpret_cast<IdentifierInfo *>(Ptr & ~PtrMask), 1);
case ObjCMultiArgSelector:
return Selector(reinterpret_cast<MultiKeywordSelector *>(Ptr & ~PtrMask));
default:
break;
}
return Selector();
}
DeclarationNameTable::DeclarationNameTable() {
CXXSpecialNamesImpl = new llvm::FoldingSet<CXXSpecialName>;
}
DeclarationNameTable::~DeclarationNameTable() {
delete static_cast<llvm::FoldingSet<CXXSpecialName>*>(CXXSpecialNamesImpl);
}
DeclarationName
DeclarationNameTable::getCXXSpecialName(DeclarationName::NameKind Kind,
QualType Ty) {
assert(Kind >= DeclarationName::CXXConstructorName &&
Kind <= DeclarationName::CXXConversionFunctionName &&
"Kind must be a C++ special name kind");
llvm::FoldingSet<CXXSpecialName> *SpecialNames
= static_cast<llvm::FoldingSet<CXXSpecialName>*>(CXXSpecialNamesImpl);
DeclarationNameExtra::ExtraKind EKind;
switch (Kind) {
case DeclarationName::CXXConstructorName:
EKind = DeclarationNameExtra::CXXConstructor;
break;
case DeclarationName::CXXDestructorName:
EKind = DeclarationNameExtra::CXXDestructor;
break;
case DeclarationName::CXXConversionFunctionName:
EKind = DeclarationNameExtra::CXXConversionFunction;
break;
default:
return DeclarationName();
}
// Unique selector, to guarantee there is one per name.
llvm::FoldingSetNodeID ID;
ID.AddInteger(EKind);
ID.AddPointer(Ty.getAsOpaquePtr());
void *InsertPos = 0;
if (CXXSpecialName *Name = SpecialNames->FindNodeOrInsertPos(ID, InsertPos))
return DeclarationName(Name);
CXXSpecialName *SpecialName = new CXXSpecialName;
SpecialName->ExtraKindOrNumArgs = EKind;
SpecialName->Type = Ty;
SpecialNames->InsertNode(SpecialName, InsertPos);
return DeclarationName(SpecialName);
}
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