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 "llvm/ADT/DenseMap.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cstdio>
#include <vector>
using namespace clang;

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

#define DECL(Derived, Base) static int n##Derived##s = 0;
#include "clang/AST/DeclNodes.def"

static bool StatSwitch = false;

const char *Decl::getDeclKindName() const {
  switch (DeclKind) {
  default: assert(0 && "Declaration not in DeclNodes.def!");
#define DECL(Derived, Base) case Derived: return #Derived;
#include "clang/AST/DeclNodes.def"
  }
}

void Decl::setInvalidDecl(bool Invalid) {
  InvalidDecl = Invalid;
  if (Invalid) {
    // Defensive maneuver for ill-formed code: we're likely not to make it to
    // a point where we set the access specifier, so default it to "public"
    // to avoid triggering asserts elsewhere in the front end. 
    setAccess(AS_public);
  }
}

const char *DeclContext::getDeclKindName() const {
  switch (DeclKind) {
  default: assert(0 && "Declaration context not in DeclNodes.def!");
#define DECL(Derived, Base) case Decl::Derived: return #Derived;
#include "clang/AST/DeclNodes.def"
  }
}

bool Decl::CollectingStats(bool Enable) {
  if (Enable) StatSwitch = true;
  return StatSwitch;
}

void Decl::PrintStats() {
  fprintf(stderr, "*** Decl Stats:\n");

  int totalDecls = 0;
#define DECL(Derived, Base) totalDecls += n##Derived##s;
#include "clang/AST/DeclNodes.def"
  fprintf(stderr, "  %d decls total.\n", totalDecls);

  int totalBytes = 0;
#define DECL(Derived, Base)                                             \
  if (n##Derived##s > 0) {                                              \
    totalBytes += (int)(n##Derived##s * sizeof(Derived##Decl));         \
    fprintf(stderr, "    %d " #Derived " decls, %d each (%d bytes)\n",  \
            n##Derived##s, (int)sizeof(Derived##Decl),                  \
            (int)(n##Derived##s * sizeof(Derived##Decl)));              \
  }
#include "clang/AST/DeclNodes.def"

  fprintf(stderr, "Total bytes = %d\n", totalBytes);
}

void Decl::addDeclKind(Kind k) {
  switch (k) {
  default: assert(0 && "Declaration not in DeclNodes.def!");
#define DECL(Derived, Base) case Derived: ++n##Derived##s; break;
#include "clang/AST/DeclNodes.def"
  }
}

bool Decl::isTemplateParameterPack() const {
  if (const TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(this))
    return TTP->isParameterPack();

  return false;
}

bool Decl::isFunctionOrFunctionTemplate() const {
  if (const UsingShadowDecl *UD = dyn_cast<UsingShadowDecl>(this))
    return UD->getTargetDecl()->isFunctionOrFunctionTemplate();

  return isa<FunctionDecl>(this) || isa<FunctionTemplateDecl>(this);
}

bool Decl::isDefinedOutsideFunctionOrMethod() const {
  for (const DeclContext *DC = getDeclContext(); 
       DC && !DC->isTranslationUnit(); 
       DC = DC->getParent())
    if (DC->isFunctionOrMethod())
      return false;

  return true;
}


//===----------------------------------------------------------------------===//
// PrettyStackTraceDecl Implementation
//===----------------------------------------------------------------------===//

void PrettyStackTraceDecl::print(llvm::raw_ostream &OS) const {
  SourceLocation TheLoc = Loc;
  if (TheLoc.isInvalid() && TheDecl)
    TheLoc = TheDecl->getLocation();

  if (TheLoc.isValid()) {
    TheLoc.print(OS, SM);
    OS << ": ";
  }

  OS << Message;

  if (const NamedDecl *DN = dyn_cast_or_null<NamedDecl>(TheDecl))
    OS << " '" << DN->getQualifiedNameAsString() << '\'';
  OS << '\n';
}

//===----------------------------------------------------------------------===//
// Decl Implementation
//===----------------------------------------------------------------------===//

// Out-of-line virtual method providing a home for Decl.
Decl::~Decl() {
  assert(!HasAttrs && "attributes should have been freed by Destroy");
}

void Decl::setDeclContext(DeclContext *DC) {
  if (isOutOfSemaDC())
    delete getMultipleDC();

  DeclCtx = DC;
}

void Decl::setLexicalDeclContext(DeclContext *DC) {
  if (DC == getLexicalDeclContext())
    return;

  if (