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