1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/angle/src/compiler/preprocessor/MacroExpander.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,75 @@
1.4 +//
1.5 +// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
1.6 +// Use of this source code is governed by a BSD-style license that can be
1.7 +// found in the LICENSE file.
1.8 +//
1.9 +
1.10 +#ifndef COMPILER_PREPROCESSOR_MACRO_EXPANDER_H_
1.11 +#define COMPILER_PREPROCESSOR_MACRO_EXPANDER_H_
1.12 +
1.13 +#include <cassert>
1.14 +#include <memory>
1.15 +#include <vector>
1.16 +
1.17 +#include "Lexer.h"
1.18 +#include "Macro.h"
1.19 +#include "pp_utils.h"
1.20 +
1.21 +namespace pp
1.22 +{
1.23 +
1.24 +class Diagnostics;
1.25 +
1.26 +class MacroExpander : public Lexer
1.27 +{
1.28 + public:
1.29 + MacroExpander(Lexer* lexer, MacroSet* macroSet, Diagnostics* diagnostics);
1.30 + virtual ~MacroExpander();
1.31 +
1.32 + virtual void lex(Token* token);
1.33 +
1.34 + private:
1.35 + PP_DISALLOW_COPY_AND_ASSIGN(MacroExpander);
1.36 +
1.37 + void getToken(Token* token);
1.38 + void ungetToken(const Token& token);
1.39 + bool isNextTokenLeftParen();
1.40 +
1.41 + bool pushMacro(const Macro& macro, const Token& identifier);
1.42 + void popMacro();
1.43 +
1.44 + bool expandMacro(const Macro& macro,
1.45 + const Token& identifier,
1.46 + std::vector<Token>* replacements);
1.47 +
1.48 + typedef std::vector<Token> MacroArg;
1.49 + bool collectMacroArgs(const Macro& macro,
1.50 + const Token& identifier,
1.51 + std::vector<MacroArg>* args);
1.52 + void replaceMacroParams(const Macro& macro,
1.53 + const std::vector<MacroArg>& args,
1.54 + std::vector<Token>* replacements);
1.55 +
1.56 + struct MacroContext
1.57 + {
1.58 + const Macro* macro;
1.59 + std::size_t index;
1.60 + std::vector<Token> replacements;
1.61 +
1.62 + MacroContext() : macro(0), index(0) { }
1.63 + bool empty() const { return index == replacements.size(); }
1.64 + const Token& get() { return replacements[index++]; }
1.65 + void unget() { assert(index > 0); --index; }
1.66 + };
1.67 +
1.68 + Lexer* mLexer;
1.69 + MacroSet* mMacroSet;
1.70 + Diagnostics* mDiagnostics;
1.71 +
1.72 + std::auto_ptr<Token> mReserveToken;
1.73 + std::vector<MacroContext*> mContextStack;
1.74 +};
1.75 +
1.76 +} // namespace pp
1.77 +#endif // COMPILER_PREPROCESSOR_MACRO_EXPANDER_H_
1.78 +
