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/****************************************************************************
**
** Copyright (C) 2016 Jochen Becher
** Contact: https://www.qt.io/licensing/
**
** 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 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.
**
****************************************************************************/
#pragma once
#include <QObject>
#include "sourcepos.h"
#include "qmt/infrastructure/exceptions.h"
namespace qmt {
class ITextSource;
class SourceChar;
class Token;
class QMT_EXPORT TextScannerError : public Exception
{
public:
TextScannerError(const QString &errorMsg, const SourcePos &sourcePos);
~TextScannerError() override;
SourcePos sourcePos() const { return m_sourcePos; }
private:
SourcePos m_sourcePos;
};
class QMT_EXPORT TextScanner : public QObject
{
Q_OBJECT
class TextScannerPrivate;
public:
explicit TextScanner(QObject *parent = 0);
~TextScanner() override;
void setKeywords(const QList<QPair<QString, int> > &keywords);
void setOperators(const QList<QPair<QString, int> > &operators);
void setSource(ITextSource *textSource);
SourcePos sourcePos() const;
Token read();
void unread(const Token &token);
private:
SourceChar readChar();
void unreadChar(const SourceChar &sourceChar);
void skipWhitespaces();
Token scanString(const SourceChar &delimiterChar);
Token scanNumber(const SourceChar &firstDigit);
Token scanIdentifier(const SourceChar &firstChar);
Token scanColorIdentifier(const SourceChar &firstChar);
Token scanOperator(const SourceChar &firstChar);
TextScannerPrivate *d;
};
} // namespace qmt
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