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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#ifndef RECOGNIZER_H
#define RECOGNIZER_H
#include "grammar_p.h"
#include "lalr.h"
#include <QtCore/qdebug.h>
#include <QtCore/qstring.h>
#include <QtCore/qfile.h>
#include <QtCore/qtextstream.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 == u'\n')
++_M_line;
}
else
ch = QChar();
}
QString expand (const QString &text) const;
protected:
// recognizer
int tos;
int stack_size;
QList<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;
};
#endif // RECOGNIZER_H
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