path: root/lib/AST/Decl.cpp

//===--- 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/DeclCXX.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/TypeLoc.h"
#include "clang/AST/Stmt.h"
#include "clang/AST/Expr.h"
#include "clang/AST/PrettyPrinter.h"
#include "clang/Basic/Builtins.h"
#include "clang/Basic/IdentifierTable.h"
#include "clang/Parse/DeclSpec.h"
#include "llvm/Support/ErrorHandling.h"
#include <vector>

using namespace clang;

void Attr::Destroy(ASTContext &C) {
  if (Next) {
    Next->Destroy(C);
    Next = 0;
  }
  this->~Attr();
  C.Deallocate((void*)this);
}

/// \brief Return the TypeLoc wrapper for the type source info.
TypeLoc DeclaratorInfo::getTypeLoc() const {
  return TypeLoc(Ty, (void*)(this + 1));
}

//===----------------------------------------------------------------------===//
// Decl Allocation/Deallocation Method Implementations
//===----------------------------------------------------------------------===//


TranslationUnitDecl *TranslationUnitDecl::Create(ASTContext &C) {
  return new (C) TranslationUnitDecl(C);
}

NamespaceDecl *NamespaceDecl::Create(ASTContext &C, DeclContext *DC,
                                     SourceLocation L, IdentifierInfo *Id) {
  return new (C) 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.Deallocate((void *)this);
}


ImplicitParamDecl *ImplicitParamDecl::Create(ASTContext &C, DeclContext *DC,
    SourceLocation L, IdentifierInfo *Id, QualType T) {
  return new (C) ImplicitParamDecl(ImplicitParam, DC, L, Id, T);
}

const char *VarDecl::getStorageClassSpecifierString(StorageClass SC) {
  switch (SC) {
  case VarDecl::None:          break;
  case VarDecl::Auto:          return "auto"; break;
  case VarDecl::Extern:        return "extern"; break;
  case VarDecl::PrivateExtern: return "__private_extern__"; break;
  case VarDecl::Register:      return "register"; break;
  case VarDecl::Static:        return "static"; break;
  }

  assert(0 && "Invalid storage class");
  return 0;
}

ParmVarDecl *ParmVarDecl::Create(ASTContext &C, DeclContext *DC,
                                 SourceLocation L, IdentifierInfo *Id,
                                 QualType T, DeclaratorInfo *DInfo,
                                 StorageClass S, Expr *DefArg) {
  return new (C) ParmVarDecl(ParmVar, DC, L, Id, T, DInfo, S, DefArg);
}

SourceRange ParmVarDecl::getDefaultArgRange() const {
  if (const Expr *E = getInit())
    return E->getSourceRange();
  
  if (const Expr *E = getUninstantiatedDefaultArg())
    return E->getSourceRange();
    
  return SourceRange();
}

void VarDecl::setInit(ASTContext &C, Expr *I) {
  if (EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>()) {
    Eval->~EvaluatedStmt();
    C.Deallocate(Eval);
  }

  Init = I;
}

bool VarDecl::isExternC() const {
  ASTContext &Context = getASTContext();
  if (!Context.getLangOptions().CPlusPlus)
    return (getDeclContext()->isTranslationUnit() &&
            getStorageClass() != Static)