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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#ifndef CPLUSPLUS_PREPROCESSOR_H
#define CPLUSPLUS_PREPROCESSOR_H
#include <CPlusPlusForwardDeclarations.h>
#include <iosfwd>
#include <vector>
#include <map>
#include <cstring>
namespace CPlusPlus {
class Lexer;
class Token;
class CPLUSPLUS_EXPORT StringRef
{
const char *_text;
unsigned _size;
public:
typedef const char *iterator;
typedef const char *const_iterator;
StringRef()
: _text(0), _size(0) {}
StringRef(const char *text, unsigned size)
: _text(text), _size(size) {}
StringRef(const char *text)
: _text(text), _size(std::strlen(text)) {}
inline const char *text() const { return _text; }
inline unsigned size() const { return _size; }
inline const_iterator begin() const { return _text; }
inline const_iterator end() const { return _text + _size; }
bool operator == (const StringRef &other) const
{
if (_size == other._size)
return _text == other._text || ! std::strncmp(_text, other._text, _size);
return false;
}
bool operator != (const StringRef &other) const
{ return ! operator == (other); }
bool operator < (const StringRef &other) const
{ return std::lexicographical_compare(begin(), end(), other.begin(), other.end()); }
};
class CPLUSPLUS_EXPORT Preprocessor
{
public:
Preprocessor(std::ostream &out);
void operator()(const char *source, unsigned size, const StringRef ¤tFileName);
private:
struct Macro
{
Macro(): isFunctionLike(false), isVariadic(false) {}
std::vector<StringRef> formals;
std::vector<Token> body;
bool isFunctionLike: 1;
bool isVariadic: 1;
};
void run(const char *source, unsigned size);
Lexer *switchLexer(Lexer *lex);
StringRef switchSource(const StringRef &source);
const Macro *resolveMacro(const StringRef &name) const;
StringRef asStringRef(const Token &tk) const;
void lex(Token *tk);
bool isValidToken(const Token &tk) const;
void handlePreprocessorDirective(Token *tk);
void handleDefineDirective(Token *tk);
void skipPreprocesorDirective(Token *tk);
void collectActualArguments(Token *tk, std::vector<std::vector<Token> > *actuals);
void scanActualArgument(Token *tk, std::vector<Token> *tokens);
private:
struct TokenBuffer;
std::ostream &out;
StringRef _currentFileName;
Lexer *_lexer;
StringRef _source;
TokenBuffer *_tokenBuffer;
bool inPreprocessorDirective: 1;
std::map<StringRef, Macro> macros;
};
} // end of namespace CPlusPlus
CPLUSPLUS_EXPORT std::ostream &operator << (std::ostream &out, const CPlusPlus::StringRef &s);
#endif // CPLUSPLUS_PREPROCESSOR_H
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