forked from qt-creator/qt-creator
140 lines
4.0 KiB
C++
140 lines
4.0 KiB
C++
/**************************************************************************
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**
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** This file is part of Qt Creator
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**
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** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** No Commercial Usage
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**
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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**
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**************************************************************************/
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#ifndef CPLUSPLUS_PREPROCESSOR_H
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#define CPLUSPLUS_PREPROCESSOR_H
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#include <CPlusPlusForwardDeclarations.h>
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#include <iosfwd>
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#include <vector>
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#include <map>
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#include <cstring>
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namespace CPlusPlus {
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class Lexer;
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class Token;
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class CPLUSPLUS_EXPORT StringRef
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{
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const char *_text;
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unsigned _size;
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public:
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typedef const char *iterator;
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typedef const char *const_iterator;
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StringRef()
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: _text(0), _size(0) {}
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StringRef(const char *text, unsigned size)
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: _text(text), _size(size) {}
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StringRef(const char *text)
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: _text(text), _size(std::strlen(text)) {}
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inline const char *text() const { return _text; }
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inline unsigned size() const { return _size; }
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inline const_iterator begin() const { return _text; }
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inline const_iterator end() const { return _text + _size; }
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bool operator == (const StringRef &other) const
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{
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if (_size == other._size)
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return _text == other._text || ! std::strncmp(_text, other._text, _size);
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return false;
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}
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bool operator != (const StringRef &other) const
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{ return ! operator == (other); }
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bool operator < (const StringRef &other) const
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{ return std::lexicographical_compare(begin(), end(), other.begin(), other.end()); }
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};
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class CPLUSPLUS_EXPORT Preprocessor
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{
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public:
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Preprocessor(std::ostream &out);
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void operator()(const char *source, unsigned size, const StringRef ¤tFileName);
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private:
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struct Macro
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{
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Macro(): isFunctionLike(false), isVariadic(false) {}
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std::vector<StringRef> formals;
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std::vector<Token> body;
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bool isFunctionLike: 1;
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bool isVariadic: 1;
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};
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void run(const char *source, unsigned size);
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Lexer *switchLexer(Lexer *lex);
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StringRef switchSource(const StringRef &source);
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const Macro *resolveMacro(const StringRef &name) const;
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StringRef asStringRef(const Token &tk) const;
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void lex(Token *tk);
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bool isValidToken(const Token &tk) const;
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void handlePreprocessorDirective(Token *tk);
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void handleDefineDirective(Token *tk);
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void skipPreprocesorDirective(Token *tk);
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void collectActualArguments(Token *tk, std::vector<std::vector<Token> > *actuals);
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void scanActualArgument(Token *tk, std::vector<Token> *tokens);
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private:
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struct TokenBuffer;
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std::ostream &out;
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StringRef _currentFileName;
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Lexer *_lexer;
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StringRef _source;
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TokenBuffer *_tokenBuffer;
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bool inPreprocessorDirective: 1;
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std::map<StringRef, Macro> macros;
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};
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} // end of namespace CPlusPlus
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CPLUSPLUS_EXPORT std::ostream &operator << (std::ostream &out, const CPlusPlus::StringRef &s);
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#endif // CPLUSPLUS_PREPROCESSOR_H
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