kc3-lang/angle/src/compiler/preprocessor/MacroExpander.h

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• Author : Geoff Lang
  Date : 2014-11-19 16:18:08
  Hash : 0a73dd85
  Message : Fix include guards. BUG=angle:733 Change-Id: I08b2c11c4831f1161c178c1842b10e807185aced Reviewed-on: https://chromium-review.googlesource.com/230831 Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>

• src/compiler/preprocessor/MacroExpander.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_MACROEXPANDER_H_
  #define COMPILER_PREPROCESSOR_MACROEXPANDER_H_
  
  #include <cassert>
  #include <memory>
  #include <vector>
  
  #include "Lexer.h"
  #include "Macro.h"
  #include "pp_utils.h"
  
  namespace pp
  {
  
  class Diagnostics;
  
  class MacroExpander : public Lexer
  {
    public:
      MacroExpander(Lexer *lexer, MacroSet *macroSet, Diagnostics *diagnostics);
      virtual ~MacroExpander();
  
      virtual void lex(Token *token);
  
    private:
      PP_DISALLOW_COPY_AND_ASSIGN(MacroExpander);
  
      void getToken(Token *token);
      void ungetToken(const Token &token);
      bool isNextTokenLeftParen();
  
      bool pushMacro(const Macro &macro, const Token &identifier);
      void popMacro();
  
      bool expandMacro(const Macro &macro,
                       const Token &identifier,
                       std::vector<Token> *replacements);
  
      typedef std::vector<Token> MacroArg;
      bool collectMacroArgs(const Macro &macro,
                            const Token &identifier,
                            std::vector<MacroArg> *args);
      void replaceMacroParams(const Macro &macro,
                              const std::vector<MacroArg> &args,
                              std::vector<Token> *replacements);
  
      struct MacroContext
      {
          const Macro *macro;
          std::size_t index;
          std::vector<Token> replacements;
  
          MacroContext()
              : macro(0),
                index(0)
          {
          }
          bool empty() const
          {
              return index == replacements.size();
          }
          const Token &get()
          {
              return replacements[index++];
          }
          void unget()
          {
              assert(index > 0);
              --index;
          }
      };
  
      Lexer *mLexer;
      MacroSet *mMacroSet;
      Diagnostics *mDiagnostics;
  
      std::auto_ptr<Token> mReserveToken;
      std::vector<MacroContext *> mContextStack;
  };
  
  }  // namespace pp
  
  #endif  // COMPILER_PREPROCESSOR_MACROEXPANDER_H_