104 lines
2.9 KiB
C++
104 lines
2.9 KiB
C++
/****************************************************************************
|
|
**
|
|
** Copyright (C) 2016 The Qt Company Ltd.
|
|
** Contact: https://www.qt.io/licensing/
|
|
**
|
|
** This file is part of the utils of the Qt Toolkit.
|
|
**
|
|
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
|
|
** 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 The Qt Company. For licensing terms
|
|
** and conditions see https://www.qt.io/terms-conditions. For further
|
|
** information use the contact form at https://www.qt.io/contact-us.
|
|
**
|
|
** GNU General Public License Usage
|
|
** Alternatively, this file may be used under the terms of the GNU
|
|
** General Public License version 3 as published by the Free Software
|
|
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
|
|
** included in the packaging of this file. Please review the following
|
|
** information to ensure the GNU General Public License requirements will
|
|
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
|
|
**
|
|
** $QT_END_LICENSE$
|
|
**
|
|
****************************************************************************/
|
|
|
|
#ifndef RE2NFA_H
|
|
#define RE2NFA_H
|
|
|
|
#include "nfa.h"
|
|
#include <QSet>
|
|
|
|
class RE2NFA
|
|
{
|
|
public:
|
|
RE2NFA(const QMap<QString, NFA> ¯os, const QSet<InputType> &maxInputSet, Qt::CaseSensitivity cs);
|
|
|
|
NFA parse(const QString &expression, int *errorColumn = 0);
|
|
|
|
private:
|
|
NFA parseExpr();
|
|
NFA parseBranch();
|
|
NFA parsePiece();
|
|
NFA parseAtom();
|
|
NFA parseMaybeQuantifier(const NFA &nfa);
|
|
NFA parseSet();
|
|
NFA parseSet2();
|
|
|
|
NFA createCharNFA();
|
|
|
|
private:
|
|
friend class RegExpTokenizer;
|
|
|
|
enum Token {
|
|
TOK_INVALID,
|
|
TOK_STRING,
|
|
TOK_LBRACE, // {
|
|
TOK_RBRACE, // }
|
|
TOK_LBRACKET, // [
|
|
TOK_RBRACKET, // ]
|
|
TOK_LPAREN, // (
|
|
TOK_RPAREN, // )
|
|
TOK_COMMA,
|
|
TOK_STAR,
|
|
TOK_OR,
|
|
TOK_QUESTION,
|
|
TOK_DOT,
|
|
TOK_PLUS,
|
|
TOK_SEQUENCE,
|
|
TOK_QUOTED_STRING
|
|
};
|
|
|
|
struct Symbol
|
|
{
|
|
inline Symbol() : token(TOK_INVALID), column(-1) {}
|
|
inline Symbol(Token t, const QString &l = QString()) : token(t), lexem(l), column(-1) {}
|
|
Token token;
|
|
QString lexem;
|
|
int column;
|
|
};
|
|
|
|
inline bool hasNext() const { return index < symbols.count(); }
|
|
inline Token next() { return symbols.at(index++).token; }
|
|
bool next(Token t);
|
|
bool test(Token t);
|
|
inline void prev() { index--; }
|
|
inline const Symbol &symbol() const { return symbols.at(index - 1); }
|
|
QString lexemUntil(Token t);
|
|
|
|
void tokenize(const QString &input);
|
|
|
|
QMap<QString, NFA> macros;
|
|
QVector<Symbol> symbols;
|
|
int index;
|
|
int errorColumn;
|
|
const QSet<InputType> maxInputSet;
|
|
Qt::CaseSensitivity caseSensitivity;
|
|
};
|
|
|
|
#endif // RE2NFA_H
|
|
|