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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QLALR project on Qt Labs.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtCore/QtDebug>
#include <QtCore/QString>
#include <QtCore/QFile>
#include <QtCore/QTextStream>
#include "grammar_p.h"
#include "lalr.h"
#include <cstdlib>
class Recognizer: protected grammar
{
public:
Recognizer (Grammar *grammar, bool no_lines);
~Recognizer();
bool parse (const QString &input_file = QString ());
inline QString decls () const { return _M_decls; }
inline QString impls () const { return _M_impls; }
protected:
inline void reallocateStack ();
inline QString &sym (int index)
{ return sym_stack [tos + index - 1]; }
protected: // scanner
int nextToken();
inline void inp ()
{
if (_M_currentChar != _M_lastChar)
{
ch = *_M_currentChar++;
if (ch == QLatin1Char('\n'))
++_M_line;
}
else
ch = QChar();
}
QString expand (const QString &text) const;
protected:
// recognizer
int tos;
int stack_size;
QVector<QString> sym_stack;
int *state_stack;
QString _M_contents;
QString::const_iterator _M_firstChar;
QString::const_iterator _M_lastChar;
QString::const_iterator _M_currentChar;
// scanner
QChar ch;
int _M_line;
int _M_action_line;
Grammar *_M_grammar;
RulePointer _M_current_rule;
QString _M_input_file;
QString _M_decls;
QString _M_impls;
QString _M_current_value;
bool _M_no_lines;
};
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