path: root/lib/Parse/Parser.cpp

//===--- Parser.cpp - C Language Family Parser ----------------------------===//
//
//                     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 Parser interfaces.
//
//===----------------------------------------------------------------------===//

#include "clang/Parse/Parser.h"
#include "clang/Parse/ParseDiagnostic.h"
#include "clang/Sema/DeclSpec.h"
#include "clang/Sema/Scope.h"
#include "clang/Sema/ParsedTemplate.h"
#include "llvm/Support/raw_ostream.h"
#include "RAIIObjectsForParser.h"
#include "ParsePragma.h"
using namespace clang;

Parser::Parser(Preprocessor &pp, Sema &actions)
  : CrashInfo(*this), PP(pp), Actions(actions), Diags(PP.getDiagnostics()),
    GreaterThanIsOperator(true), ColonIsSacred(false), 
    InMessageExpression(false), TemplateParameterDepth(0) {
  Tok.setKind(tok::eof);
  Actions.CurScope = 0;
  NumCachedScopes = 0;
  ParenCount = BracketCount = BraceCount = 0;
  ObjCImpDecl = 0;

  // Add #pragma handlers. These are removed and destroyed in the
  // destructor.
  AlignHandler.reset(new PragmaAlignHandler(actions));
  PP.AddPragmaHandler(AlignHandler.get());

  GCCVisibilityHandler.reset(new PragmaGCCVisibilityHandler(actions));
  PP.AddPragmaHandler("GCC", GCCVisibilityHandler.get());

  OptionsHandler.reset(new PragmaOptionsHandler(actions));
  PP.AddPragmaHandler(OptionsHandler.get());

  PackHandler.reset(new PragmaPackHandler(actions));
  PP.AddPragmaHandler(PackHandler.get());

  UnusedHandler.reset(new PragmaUnusedHandler(actions, *this));
  PP.AddPragmaHandler(UnusedHandler.get());

  WeakHandler.reset(new PragmaWeakHandler(actions));
  PP.AddPragmaHandler(WeakHandler.get());
      
  PP.setCodeCompletionHandler(*this);
}

/// If a crash happens while the parser is active, print out a line indicating
/// what the current token is.
void PrettyStackTraceParserEntry::print(llvm::raw_ostream &OS) const {
  const Token &Tok = P.getCurToken();
  if (Tok.is(tok::eof)) {
    OS << "<eof> parser at end of file\n";
    return;
  }

  if (Tok.getLocation().isInvalid()) {
    OS << "<unknown> parser at unknown location\n";
    return;
  }

  const Preprocessor &PP = P.getPreprocessor();
  Tok.getLocation().print(OS, PP.getSourceManager());
  if (Tok.isAnnotation())
    OS << ": at annotation token \n";
  else
    OS << ": current parser token '" << PP.getSpelling(Tok) << "'\n";
}


DiagnosticBuilder Parser::Diag(SourceLocation Loc, unsigned DiagID) {
  return Diags.Report(FullSourceLoc(Loc, PP.getSourceManager()), DiagID);
}

DiagnosticBuilder Parser::Diag(const Token &Tok, unsigned DiagID) {
  return Diag(Tok.getLocation(),