path: root/lib/AST/DeclBase.cpp

//===--- DeclBase.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 and DeclContext classes.
//
//===----------------------------------------------------------------------===//

#include "clang/AST/DeclBase.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclContextInternals.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclFriend.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/DependentDiagnostic.h"
#include "clang/AST/ExternalASTSource.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Type.h"
#include "clang/AST/Stmt.h"
#include "clang/AST/StmtCXX.h"
#include "clang/AST/ASTMutationListener.h"
#include "clang/Basic/TargetInfo.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
using namespace clang;

//===----------------------------------------------------------------------===//
//  Statistics
//===----------------------------------------------------------------------===//

#define DECL(DERIVED, BASE) static int n##DERIVED##s = 0;
#define ABSTRACT_DECL(DECL)
#include "clang/AST/DeclNodes.inc"

void *Decl::AllocateDeserializedDecl(const ASTContext &Context, 
                                     unsigned ID,
                                     unsigned Size) {
  // Allocate an extra 8 bytes worth of storage, which ensures that the
  // resulting pointer will still be 8-byte aligned. 
  void *Start = Context.Allocate(Size + 8);
  void *Result = (char*)Start + 8;
  
  unsigned *PrefixPtr = (unsigned *)Result - 2;
  
  // Zero out the first 4 bytes; this is used to store the owning module ID.
  PrefixPtr[0] = 0;
  
  // Store the global declaration ID in the second 4 bytes.
  PrefixPtr[1] = ID;
  
  return Result;
}

const char *Decl::getDeclKindName() const {
  switch (DeclKind) {
  default: llvm_unreachable("Declaration not in DeclNodes.inc!");
#define DECL(DERIVED, BASE) case DERIVED: return #DERIVED;
#define ABSTRACT_DECL(DECL)
#include "clang/AST/DeclNodes.inc"
  }
}

void Decl::setInvalidDecl(bool Invalid) {
  InvalidDecl = Invalid;
  if (Invalid && !isa<ParmVarDecl>(this)) {
    // Defensive maneuver for ill-formed code: we're likely not to make it to
    // a point where