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

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• Author : Corentin Wallez
  Date : 2016-09-20 17:15:59
  Hash : 054f7ed0
  Message : preprocessor: Miscellaneous cleanups - Use full header paths in includes - Use ASSERT instead of assert - Use angle::NonCopyable instead of PP_DISALLOW_COPY_AND_ASSIGN - Use range-for in a couple places - Remove pp_utils.h BUG=angleproject:1522 Change-Id: If107fef89e8465bca65cf664926d1051c5d1e232 Reviewed-on: https://chromium-review.googlesource.com/387212 Commit-Queue: Corentin Wallez <cwallez@chromium.org> Reviewed-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 <memory>
  #include <vector>
  
  #include "compiler/preprocessor/Lexer.h"
  #include "compiler/preprocessor/Macro.h"
  
  namespace pp
  {
  
  class Diagnostics;
  struct SourceLocation;
  
  class MacroExpander : public Lexer
  {
    public:
      MacroExpander(Lexer *lexer, MacroSet *macroSet, Diagnostics *diagnostics);
      ~MacroExpander() override;
  
      void lex(Token *token) override;
  
    private:
      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,
                            SourceLocation *closingParenthesisLocation);
      void replaceMacroParams(const Macro &macro,
                              const std::vector<MacroArg> &args,
                              std::vector<Token> *replacements);
  
      struct MacroContext
      {
          MacroContext();
          bool empty() const;
          const Token &get();
          void unget();
  
          const Macro *macro;
          std::size_t index;
          std::vector<Token> replacements;
      };
  
      Lexer *mLexer;
      MacroSet *mMacroSet;
      Diagnostics *mDiagnostics;
  
      std::unique_ptr<Token> mReserveToken;
      std::vector<MacroContext *> mContextStack;
      size_t mTotalTokensInContexts;
  };
  
  }  // namespace pp
  
  #endif  // COMPILER_PREPROCESSOR_MACROEXPANDER_H_