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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
#ifndef Patternist_SourceLocationReflection_H
#define Patternist_SourceLocationReflection_H
QT_BEGIN_NAMESPACE
class QString;
namespace QPatternist
{
/**
* @short Base class for all instances that represents something
* at a certain location.
*
* SourceLocationReflection does not provide the source location itself,
* the address to an instance is the mark for it, that in turn can be used
* for looking up the source location where that mapping is provided.
*
* However, this SourceLocationReflection is not itself the mark. The real
* mark is retrieved by calling actualReflection(). This mechanism
* allows a SourceLocationReflection sub-class to delegate, or be an alias,
* for another source location mark.
*
* If sourceLocation() returns a non-null object, it will be used instead
* of looking up via actualReflection().
*
* @author Frans Englich <frans.englich@nokia.com>
* @ingroup Patternist_expressions
*/
class Q_AUTOTEST_EXPORT SourceLocationReflection
{
public:
inline SourceLocationReflection()
{
}
virtual ~SourceLocationReflection()
{
}
virtual const SourceLocationReflection *actualReflection() const = 0;
/**
* A description of what represents the source code location, for
* human consumption. Must be translated, as appropriate.
*/
virtual QString description() const
{
return QString();
}
virtual QSourceLocation sourceLocation() const;
private:
Q_DISABLE_COPY(SourceLocationReflection)
};
class DelegatingSourceLocationReflection : public SourceLocationReflection
{
public:
inline DelegatingSourceLocationReflection(const SourceLocationReflection *const r) : m_r(r)
{
Q_ASSERT(r);
}
virtual const SourceLocationReflection *actualReflection() const;
virtual QString description() const;
private:
const SourceLocationReflection *const m_r;
};
}
QT_END_NAMESPACE
#endif
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