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Diffstat (limited to 'src/3rdparty/angle/src/compiler/preprocessor/MacroExpander.h')
-rw-r--r-- | src/3rdparty/angle/src/compiler/preprocessor/MacroExpander.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/compiler/preprocessor/MacroExpander.h b/src/3rdparty/angle/src/compiler/preprocessor/MacroExpander.h new file mode 100644 index 0000000000..21b67571f1 --- /dev/null +++ b/src/3rdparty/angle/src/compiler/preprocessor/MacroExpander.h @@ -0,0 +1,75 @@ +// +// 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_MACRO_EXPANDER_H_ +#define COMPILER_PREPROCESSOR_MACRO_EXPANDER_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_MACRO_EXPANDER_H_ + |