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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia 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
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
//
// 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_Aggregator_H
#define Patternist_Aggregator_H
#include "qfunctioncall_p.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
namespace QPatternist
{
/**
* @short Carries a staticType() implementation appropriate
* for functions which returns a singleton value derived from its first argument.
*
* One example of such a function is FloorFN, implementing <tt>fn:floor()</tt>,
* which returns a single value of the same type as the first argument, or the empty
* sequence if the first argument evaluates to the empty sequence.
*
* Aggregator is abstract, and exists for saving code. It is inherited
* by classes which needs the staticType() implementation this class provides.
*
* @see Piper
* @ingroup Patternist_functions
* @author Frans Englich <frans.englich@nokia.com>
*/
class Aggregator : public FunctionCall
{
public:
/**
* @returns a static type where the ItemType is the same as this FunctionCall's first
* argument, and the Cardinality is as return from Cardinality::toWithoutMany().
*/
virtual SequenceType::Ptr staticType() const;
};
}
QT_END_NAMESPACE
QT_END_HEADER
#endif
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