| // |
| // 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, |
| int allowedMacroExpansionDepth); |
| ~MacroExpander() override; |
| |
| void lex(Token *token) override; |
| |
| private: |
| void getToken(Token *token); |
| void ungetToken(const Token &token); |
| bool isNextTokenLeftParen(); |
| |
| bool pushMacro(std::shared_ptr<Macro> macro, const Token &identifier); |
| void popMacro(); |
| |
| bool expandMacro(const Macro ¯o, const Token &identifier, std::vector<Token> *replacements); |
| |
| typedef std::vector<Token> MacroArg; |
| bool collectMacroArgs(const Macro ¯o, |
| const Token &identifier, |
| std::vector<MacroArg> *args, |
| SourceLocation *closingParenthesisLocation); |
| void replaceMacroParams(const Macro ¯o, |
| const std::vector<MacroArg> &args, |
| std::vector<Token> *replacements); |
| |
| struct MacroContext |
| { |
| MacroContext(); |
| bool empty() const; |
| const Token &get(); |
| void unget(); |
| |
| std::shared_ptr<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; |
| |
| int mAllowedMacroExpansionDepth; |
| |
| bool mDeferReenablingMacros; |
| std::vector<std::shared_ptr<Macro>> mMacrosToReenable; |
| |
| class ScopedMacroReenabler; |
| }; |
| |
| } // namespace pp |
| |
| #endif // COMPILER_PREPROCESSOR_MACROEXPANDER_H_ |