kc3-lang/angle/src/compiler/preprocessor/new/DirectiveParser.h

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• Author : alokp@chromium.org
  Date : 2012-07-03 16:06:40
  Hash : d0d9f87a
  Message : Make sure that #version occurs before anything else, except for comments and white space. Review URL: https://codereview.appspot.com/6348056 git-svn-id: https://angleproject.googlecode.com/svn/trunk@1184 736b8ea6-26fd-11df-bfd4-992fa37f6226

• src/compiler/preprocessor/new/DirectiveParser.h

• //
  // Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  #ifndef COMPILER_PREPROCESSOR_DIRECTIVE_PARSER_H_
  #define COMPILER_PREPROCESSOR_DIRECTIVE_PARSER_H_
  
  #include "Lexer.h"
  #include "Macro.h"
  #include "pp_utils.h"
  #include "SourceLocation.h"
  
  namespace pp
  {
  
  class Diagnostics;
  class DirectiveHandler;
  class Tokenizer;
  
  class DirectiveParser : public Lexer
  {
    public:
      DirectiveParser(Tokenizer* tokenizer,
                      MacroSet* macroSet,
                      Diagnostics* diagnostics,
                      DirectiveHandler* directiveHandler);
  
      virtual void lex(Token* token);
  
    private:
      PP_DISALLOW_COPY_AND_ASSIGN(DirectiveParser);
  
      void parseDirective(Token* token);
      void parseDefine(Token* token);
      void parseUndef(Token* token);
      void parseIf(Token* token);
      void parseIfdef(Token* token);
      void parseIfndef(Token* token);
      void parseElse(Token* token);
      void parseElif(Token* token);
      void parseEndif(Token* token);
      void parseError(Token* token);
      void parsePragma(Token* token);
      void parseExtension(Token* token);
      void parseVersion(Token* token);
      void parseLine(Token* token);
  
      bool skipping() const;
      void parseConditionalIf(Token* token);
      int parseExpressionIf(Token* token);
      int parseExpressionIfdef(Token* token);
  
      struct ConditionalBlock
      {
          std::string type;
          SourceLocation location;
          bool skipBlock;
          bool skipGroup;
          bool foundValidGroup;
          bool foundElseGroup;
  
          ConditionalBlock() :
              skipBlock(false),
              skipGroup(false),
              foundValidGroup(false),
              foundElseGroup(false)
          {
          }
      };
      bool mPastFirstStatement;
      std::vector<ConditionalBlock> mConditionalStack;
      Tokenizer* mTokenizer;
      MacroSet* mMacroSet;
      Diagnostics* mDiagnostics;
      DirectiveHandler* mDirectiveHandler;
  };
  
  }  // namespace pp
  #endif  // COMPILER_PREPROCESSOR_DIRECTIVE_PARSER_H_