qt5base-lts/util/lexgen/nfa.h
Axel Waggershauser b11317a643 Whitespace cleanup: remove trailing whitespace
Remove all trailing whitespace from the following list of files:
*.cpp *.h *.conf *.qdoc *.pro *.pri *.mm *.rc *.pl *.qps *.xpm *.txt *README
excluding 3rdparty, test-data and auto generated code.

Note A): the only non 3rdparty c++-files that still
have trailing whitespace after this change are:
* src/corelib/codecs/cp949codetbl_p.h
* src/corelib/codecs/qjpunicode.cpp
* src/corelib/codecs/qbig5codec.cpp
* src/corelib/xml/qxmlstream_p.h
* src/tools/qdoc/qmlparser/qqmljsgrammar.cpp
* src/tools/uic/ui4.cpp
* tests/auto/other/qtokenautomaton/tokenizers/*
* tests/benchmarks/corelib/tools/qstring/data.cpp
* util/lexgen/tokenizer.cpp

Note B): in about 30 files some overlapping 'leading tab' and
'TAB character in non-leading whitespace' issues have been fixed
to make the sanity bot happy. Plus some general ws-fixes here
and there as asked for during review.

Change-Id: Ia713113c34d82442d6ce4d93d8b1cf545075d11d
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
2013-03-16 20:22:50 +01:00

128 lines
4.0 KiB
C++

/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the utils of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
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** accordance with the commercial license agreement provided with the
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** 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.
**
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** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, 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
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****************************************************************************/
#ifndef NFA_H
#define NFA_H
#include <QMap>
#include <QHash>
#include <QString>
#include <QVector>
#include <QDebug>
#include <QStack>
#include <QByteArray>
#include "global.h"
typedef QHash<InputType, int> TransitionMap;
struct State
{
QString symbol;
TransitionMap transitions;
};
inline QDataStream &operator<<(QDataStream &stream, const State &state)
{
return stream << state.symbol << state.transitions;
}
inline QDataStream &operator>>(QDataStream &stream, State &state)
{
return stream >> state.symbol >> state.transitions;
}
struct DFA : public QVector<State>
{
void debug() const;
DFA minimize() const;
};
class NFA
{
public:
static NFA createSingleInputNFA(InputType input);
static NFA createSymbolNFA(const QString &symbol);
static NFA createAlternatingNFA(const NFA &a, const NFA &b);
static NFA createConcatenatingNFA(const NFA &a, const NFA &b);
static NFA createOptionalNFA(const NFA &a);
// convenience
static NFA createStringNFA(const QByteArray &str);
static NFA createSetNFA(const QSet<InputType> &set);
static NFA createZeroOrOneNFA(const NFA &a);
static NFA applyQuantity(const NFA &a, int minOccurrences, int maxOccurrences);
void setTerminationSymbol(const QString &symbol);
DFA toDFA() const;
inline bool isEmpty() const { return states.isEmpty(); }
inline int stateCount() const { return states.count(); }
void debug();
private:
void initialize(int size);
void addTransition(int from, InputType input, int to);
void copyFrom(const NFA &other, int baseState);
void initializeFromPair(const NFA &a, const NFA &b,
int *initialA, int *finalA,
int *initialB, int *finalB);
QSet<int> epsilonClosure(const QSet<int> &initialClosure) const;
inline void assertValidState(int state)
{ Q_UNUSED(state); Q_ASSERT(state >= 0); Q_ASSERT(state < states.count()); }
#if defined(AUTOTEST)
public:
#endif
int initialState;
int finalState;
QVector<State> states;
};
#endif // NFA_H