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comparison: gfx/angle/src/compiler/preprocessor/MacroExpander.h
gfx/angle/src/compiler/preprocessor/MacroExpander.h
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| 1 // | |
| 2 // Copyright (c) 2012 The ANGLE Project Authors. All rights reserved. | |
| 3 // Use of this source code is governed by a BSD-style license that can be | |
| 4 // found in the LICENSE file. | |
| 5 // | |
| 6 | |
| 7 #ifndef COMPILER_PREPROCESSOR_MACRO_EXPANDER_H_ | |
| 8 #define COMPILER_PREPROCESSOR_MACRO_EXPANDER_H_ | |
| 9 | |
| 10 #include <cassert> | |
| 11 #include <memory> | |
| 12 #include <vector> | |
| 13 | |
| 14 #include "Lexer.h" | |
| 15 #include "Macro.h" | |
| 16 #include "pp_utils.h" | |
| 17 | |
| 18 namespace pp | |
| 19 { | |
| 20 | |
| 21 class Diagnostics; | |
| 22 | |
| 23 class MacroExpander : public Lexer | |
| 24 { | |
| 25 public: | |
| 26 MacroExpander(Lexer* lexer, MacroSet* macroSet, Diagnostics* diagnostics); | |
| 27 virtual ~MacroExpander(); | |
| 28 | |
| 29 virtual void lex(Token* token); | |
| 30 | |
| 31 private: | |
| 32 PP_DISALLOW_COPY_AND_ASSIGN(MacroExpander); | |
| 33 | |
| 34 void getToken(Token* token); | |
| 35 void ungetToken(const Token& token); | |
| 36 bool isNextTokenLeftParen(); | |
| 37 | |
| 38 bool pushMacro(const Macro& macro, const Token& identifier); | |
| 39 void popMacro(); | |
| 40 | |
| 41 bool expandMacro(const Macro& macro, | |
| 42 const Token& identifier, | |
| 43 std::vector<Token>* replacements); | |
| 44 | |
| 45 typedef std::vector<Token> MacroArg; | |
| 46 bool collectMacroArgs(const Macro& macro, | |
| 47 const Token& identifier, | |
| 48 std::vector<MacroArg>* args); | |
| 49 void replaceMacroParams(const Macro& macro, | |
| 50 const std::vector<MacroArg>& args, | |
| 51 std::vector<Token>* replacements); | |
| 52 | |
| 53 struct MacroContext | |
| 54 { | |
| 55 const Macro* macro; | |
| 56 std::size_t index; | |
| 57 std::vector<Token> replacements; | |
| 58 | |
| 59 MacroContext() : macro(0), index(0) { } | |
| 60 bool empty() const { return index == replacements.size(); } | |
| 61 const Token& get() { return replacements[index++]; } | |
| 62 void unget() { assert(index > 0); --index; } | |
| 63 }; | |
| 64 | |
| 65 Lexer* mLexer; | |
| 66 MacroSet* mMacroSet; | |
| 67 Diagnostics* mDiagnostics; | |
| 68 | |
| 69 std::auto_ptr<Token> mReserveToken; | |
| 70 std::vector<MacroContext*> mContextStack; | |
| 71 }; | |
| 72 | |
| 73 } // namespace pp | |
| 74 #endif // COMPILER_PREPROCESSOR_MACRO_EXPANDER_H_ | |
| 75 |
