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// Copyright (C) 2016 Jochen Becher
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0 WITH Qt-GPL-exception-1.0
#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 = nullptr);
~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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