clang-1/lib/AST/Decl.cpp

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8.8 KiB
C++

//===--- Decl.cpp - 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 Decl subclasses.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/Decl.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Stmt.h"
#include "clang/Basic/IdentifierTable.h"
using namespace clang;
//===----------------------------------------------------------------------===//
// Decl Allocation/Deallocation Method Implementations
//===----------------------------------------------------------------------===//
TranslationUnitDecl *TranslationUnitDecl::Create(ASTContext &C) {
void *Mem = C.getAllocator().Allocate<TranslationUnitDecl>();
return new (Mem) TranslationUnitDecl();
}
NamespaceDecl *NamespaceDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L, IdentifierInfo *Id) {
void *Mem = C.getAllocator().Allocate<NamespaceDecl>();
return new (Mem) NamespaceDecl(DC, L, Id);
}
void NamespaceDecl::Destroy(ASTContext& C) {
// NamespaceDecl uses "NextDeclarator" to chain namespace declarations
// together. They are all top-level Decls.
this->~NamespaceDecl();
C.getAllocator().Deallocate((void *)this);
}
ImplicitParamDecl *ImplicitParamDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L, IdentifierInfo *Id, QualType T, ScopedDecl *PrevDecl) {
void *Mem = C.getAllocator().Allocate<ImplicitParamDecl>();
return new (Mem) ImplicitParamDecl(ImplicitParam, DC, L, Id, T, PrevDecl);
}
VarDecl *VarDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L,
IdentifierInfo *Id, QualType T,
StorageClass S, ScopedDecl *PrevDecl) {
void *Mem = C.getAllocator().Allocate<VarDecl>();
return new (Mem) VarDecl(Var, DC, L, Id, T, S, PrevDecl);
}
ParmVarDecl *ParmVarDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L, IdentifierInfo *Id,
QualType T, StorageClass S,
Expr *DefArg, ScopedDecl *PrevDecl) {
void *Mem = C.getAllocator().Allocate<ParmVarDecl>();
return new (Mem) ParmVarDecl(DC, L, Id, T, S, DefArg, PrevDecl);
}
FunctionDecl *FunctionDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L,
IdentifierInfo *Id, QualType T,
StorageClass S, bool isInline,
ScopedDecl *PrevDecl) {
void *Mem = C.getAllocator().Allocate<FunctionDecl>();
return new (Mem) FunctionDecl(Function, DC, L, Id, T, S, isInline, PrevDecl);
}
FieldDecl *FieldDecl::Create(ASTContext &C, SourceLocation L,
IdentifierInfo *Id, QualType T, Expr *BW) {
void *Mem = C.getAllocator().Allocate<FieldDecl>();
return new (Mem) FieldDecl(L, Id, T, BW);
}
EnumConstantDecl *EnumConstantDecl::Create(ASTContext &C, EnumDecl *CD,
SourceLocation L,
IdentifierInfo *Id, QualType T,
Expr *E, const llvm::APSInt &V,
ScopedDecl *PrevDecl){
void *Mem = C.getAllocator().Allocate<EnumConstantDecl>();
return new (Mem) EnumConstantDecl(CD, L, Id, T, E, V, PrevDecl);
}
void EnumConstantDecl::Destroy(ASTContext& C) {
if (Init) Init->Destroy(C);
Decl::Destroy(C);
}
TypedefDecl *TypedefDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L,
IdentifierInfo *Id, QualType T,
ScopedDecl *PD) {
void *Mem = C.getAllocator().Allocate<TypedefDecl>();
return new (Mem) TypedefDecl(DC, L, Id, T, PD);
}
EnumDecl *EnumDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L,
IdentifierInfo *Id,
ScopedDecl *PrevDecl) {
void *Mem = C.getAllocator().Allocate<EnumDecl>();
return new (Mem) EnumDecl(DC, L, Id, PrevDecl);
}
RecordDecl *RecordDecl::Create(ASTContext &C, TagKind TK, DeclContext *DC,
SourceLocation L, IdentifierInfo *Id,
ScopedDecl *PrevDecl) {
void *Mem = C.getAllocator().Allocate<RecordDecl>();
Kind DK;
switch (TK) {
default: assert(0 && "Invalid TagKind!");
case TK_enum: assert(0 && "Enum TagKind passed for Record!");
case TK_struct: DK = Struct; break;
case TK_union: DK = Union; break;
case TK_class: DK = Class; break;
}
return new (Mem) RecordDecl(DK, DC, L, Id, PrevDecl);
}
void EnumDecl::Destroy(ASTContext& C) {
if (getEnumConstantList()) getEnumConstantList()->Destroy(C);
Decl::Destroy(C);
}
FileScopeAsmDecl *FileScopeAsmDecl::Create(ASTContext &C,
SourceLocation L,
StringLiteral *Str) {
void *Mem = C.getAllocator().Allocate<FileScopeAsmDecl>();
return new (Mem) FileScopeAsmDecl(L, Str);
}
LinkageSpecDecl *LinkageSpecDecl::Create(ASTContext &C,
SourceLocation L,
LanguageIDs Lang, Decl *D) {
void *Mem = C.getAllocator().Allocate<LinkageSpecDecl>();
return new (Mem) LinkageSpecDecl(L, Lang, D);
}
//===----------------------------------------------------------------------===//
// NamedDecl Implementation
//===----------------------------------------------------------------------===//
const char *NamedDecl::getName() const {
if (const IdentifierInfo *II = getIdentifier())
return II->getName();
return "";
}
//===----------------------------------------------------------------------===//
// FunctionDecl Implementation
//===----------------------------------------------------------------------===//
FunctionDecl::~FunctionDecl() {
delete[] ParamInfo;
}
void FunctionDecl::Destroy(ASTContext& C) {
if (Body)
Body->Destroy(C);
for (param_iterator I=param_begin(), E=param_end(); I!=E; ++I)
(*I)->Destroy(C);
Decl::Destroy(C);
}
Stmt *FunctionDecl::getBody(const FunctionDecl *&Definition) const {
for (const FunctionDecl *FD = this; FD != 0; FD = FD->PreviousDeclaration) {
if (FD->Body) {
Definition = FD;
return FD->Body;
}
}
return 0;
}
unsigned FunctionDecl::getNumParams() const {
const FunctionType *FT = getType()->getAsFunctionType();
if (isa<FunctionTypeNoProto>(FT))
return 0;
return cast<FunctionTypeProto>(FT)->getNumArgs();
}
void FunctionDecl::setParams(ParmVarDecl **NewParamInfo, unsigned NumParams) {
assert(ParamInfo == 0 && "Already has param info!");
assert(NumParams == getNumParams() && "Parameter count mismatch!");
// Zero params -> null pointer.
if (NumParams) {
ParamInfo = new ParmVarDecl*[NumParams];
memcpy(ParamInfo, NewParamInfo, sizeof(ParmVarDecl*)*NumParams);
}
}
/// getMinRequiredArguments - Returns the minimum number of arguments
/// needed to call this function. This may be fewer than the number of
/// function parameters, if some of the parameters have default
/// arguments (in C++).
unsigned FunctionDecl::getMinRequiredArguments() const {
unsigned NumRequiredArgs = getNumParams();
while (NumRequiredArgs > 0
&& getParamDecl(NumRequiredArgs-1)->getDefaultArg())
--NumRequiredArgs;
return NumRequiredArgs;
}
//===----------------------------------------------------------------------===//
// RecordDecl Implementation
//===----------------------------------------------------------------------===//
RecordDecl::~RecordDecl() {
delete[] Members;
}
void RecordDecl::Destroy(ASTContext& C) {
if (isDefinition())
for (field_iterator I=field_begin(), E=field_end(); I!=E; ++I)
(*I)->Destroy(C);
TagDecl::Destroy(C);
}
/// defineBody - When created, RecordDecl's correspond to a forward declared
/// record. This method is used to mark the decl as being defined, with the
/// specified contents.
void RecordDecl::defineBody(FieldDecl **members, unsigned numMembers) {
assert(!isDefinition() && "Cannot redefine record!");
setDefinition(true);
NumMembers = numMembers;
if (numMembers) {
Members = new FieldDecl*[numMembers];
memcpy(Members, members, numMembers*sizeof(Decl*));
}
}
FieldDecl *RecordDecl::getMember(IdentifierInfo *II) {
if (Members == 0 || NumMembers < 0)
return 0;
// Linear search. When C++ classes come along, will likely need to revisit.
for (int i = 0; i != NumMembers; ++i)
if (Members[i]->getIdentifier() == II)
return Members[i];
return 0;
}