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//===--- DeclCXX.cpp - C++ 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.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/DeclCXX.h"
#include "clang/AST/ASTContext.h"
using namespace clang;
//===----------------------------------------------------------------------===//
// Decl Allocation/Deallocation Method Implementations
//===----------------------------------------------------------------------===//
CXXFieldDecl *CXXFieldDecl::Create(ASTContext &C, CXXRecordDecl *RD,
SourceLocation L, IdentifierInfo *Id,
QualType T, Expr *BW) {
void *Mem = C.getAllocator().Allocate<CXXFieldDecl>();
return new (Mem) CXXFieldDecl(RD, L, Id, T, BW);
}
CXXRecordDecl *CXXRecordDecl::Create(ASTContext &C, TagKind TK, DeclContext *DC,
SourceLocation L, IdentifierInfo *Id,
CXXRecordDecl* PrevDecl) {
void *Mem = C.getAllocator().Allocate<CXXRecordDecl>();
CXXRecordDecl* R = new (Mem) CXXRecordDecl(TK, DC, L, Id);
C.getTypeDeclType(R, PrevDecl);
return R;
}
CXXRecordDecl::~CXXRecordDecl() {
delete [] Bases;
}
void CXXRecordDecl::Destroy(ASTContext &C) {
for (OverloadedFunctionDecl::function_iterator func
= Constructors.function_begin();
func != Constructors.function_end(); ++func)
(*func)->Destroy(C);
RecordDecl::Destroy(C);
}
void
CXXRecordDecl::setBases(CXXBaseSpecifier const * const *Bases,
unsigned NumBases) {
if (this->Bases)
delete [] this->Bases;
this->Bases = new CXXBaseSpecifier[NumBases];
this->NumBases = NumBases;
for (unsigned i = 0; i < NumBases; ++i)
this->Bases[i] = *Bases[i];
}
bool CXXRecordDecl::hasConstCopyConstructor(ASTContext &Context) const {
for (OverloadedFunctionDecl::function_const_iterator Con
= Constructors.function_begin();
Con != Constructors.function_end(); ++Con) {
unsigned TypeQuals;
if (cast<CXXConstructorDecl>(*Con)->isCopyConstructor(Context, TypeQuals) &&
(TypeQuals & QualType::Const != 0))
return true;
}
return false;
}
void
CXXRecordDecl::addConstructor(ASTContext &Context,
CXXConstructorDecl *ConDecl) {
if (!ConDecl->isImplicitlyDeclared()) {
// Note that we have a user-declared constructor.
UserDeclaredConstructor = true;
// Note when we have a user-declared copy constructor, which will
// suppress the implicit declaration of a copy constructor.
if (ConDecl->isCopyConstructor(Context))
UserDeclaredCopyConstructor = true;
}
Constructors.addOverload(ConDecl);
}
CXXMethodDecl *
CXXMethodDecl::Create(ASTContext &C, CXXRecordDecl *RD,
SourceLocation L, IdentifierInfo *Id,
QualType T, bool isStatic, bool isInline,
ScopedDecl *PrevDecl) {
void *Mem = C.getAllocator().Allocate<CXXMethodDecl>();
return new (Mem) CXXMethodDecl(RD, L, Id, T, isStatic, isInline, PrevDecl);
}
QualType CXXMethodDecl::getThisType(ASTContext &C) const {
// C++ 9.3.2p1: The type of this in a member function of a class X is X*.
// If the member function is declared const, the type of this is const X*,
// if the member function is declared volatile, the type of this is
// volatile X*, and if the member function is declared const volatile,
// the type of this is const volatile X*.
assert(isInstance() && "No 'this' for static methods!");
QualType ClassTy = C.getTagDeclType(const_cast<CXXRecordDecl*>(getParent()));
ClassTy = ClassTy.getWithAdditionalQualifiers(getTypeQualifiers());
return C.getPointerType(ClassTy).withConst();
}
CXXConstructorDecl *
CXXConstructorDecl::Create(ASTContext &C, CXXRecordDecl *RD,
SourceLocation L, IdentifierInfo *Id,
QualType T, bool isExplicit,
bool isInline, bool isImplicitlyDeclared) {
void *Mem = C.getAllocator().Allocate<CXXConstructorDecl>();
return new (Mem) CXXConstructorDecl(RD, L, Id, T, isExplicit, isInline,
isImplicitlyDeclared);
}
bool CXXConstructorDecl::isDefaultConstructor() const {
// C++ [class.ctor]p5:
//
// A default constructor for a class X is a constructor of class
// X that can be called without an argument.
return (getNumParams() == 0) ||
(getNumParams() > 0 & getParamDecl(1)->getDefaultArg() != 0);
}
bool
CXXConstructorDecl::isCopyConstructor(ASTContext &Context,
unsigned &TypeQuals) const {
// C++ [class.copy]p2:
// A non-template constructor for class X is a copy constructor
// if its first parameter is of type X&, const X&, volatile X& or
// const volatile X&, and either there are no other parameters
// or else all other parameters have default arguments (8.3.6).
if ((getNumParams() < 1) ||
(getNumParams() > 1 && getParamDecl(1)->getDefaultArg() == 0))
return false;
const ParmVarDecl *Param = getParamDecl(0);
// Do we have a reference type?
const ReferenceType *ParamRefType = Param->getType()->getAsReferenceType();
if (!ParamRefType)
return false;
// Is it a reference to our class type?
QualType PointeeType
= Context.getCanonicalType(ParamRefType->getPointeeType());
QualType ClassTy
= Context.getTagDeclType(const_cast<CXXRecordDecl*>(getParent()));
if (PointeeType.getUnqualifiedType() != ClassTy)
return false;
// We have a copy constructor.
TypeQuals = PointeeType.getCVRQualifiers();
return true;
}
bool CXXConstructorDecl::isConvertingConstructor() const {
// C++ [class.conv.ctor]p1:
// A constructor declared without the function-specifier explicit
// that can be called with a single parameter specifies a
// conversion from the type of its first parameter to the type of
// its class. Such a constructor is called a converting
// constructor.
if (isExplicit())
return false;
return (getNumParams() == 0 &&
getType()->getAsFunctionTypeProto()->isVariadic()) ||
(getNumParams() == 1) ||
(getNumParams() > 1 && getParamDecl(1)->getDefaultArg() != 0);
}
CXXClassVarDecl *CXXClassVarDecl::Create(ASTContext &C, CXXRecordDecl *RD,
SourceLocation L, IdentifierInfo *Id,
QualType T, ScopedDecl *PrevDecl) {
void *Mem = C.getAllocator().Allocate<CXXClassVarDecl>();
return new (Mem) CXXClassVarDecl(RD, L, Id, T, PrevDecl);
}
OverloadedFunctionDecl *
OverloadedFunctionDecl::Create(ASTContext &C, DeclContext *DC,
IdentifierInfo *Id) {
void *Mem = C.getAllocator().Allocate<OverloadedFunctionDecl>();
return new (Mem) OverloadedFunctionDecl(DC, Id);
}
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