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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** 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-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// 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_ArgumentConverter_H
#define Patternist_ArgumentConverter_H
#include <private/quntypedatomicconverter_p.h>
QT_BEGIN_NAMESPACE
namespace QPatternist
{
/**
* @short UntypedAtomicConverter for ArgumentReference, if needed.
*
* If an argument inside a user function has no type declared, its type
* is @c item(). It's atomized type would be inferred to @c
* xs:anyAtomicType, but that is not necessarily correct, since the actual
* value can be anything, nodes or atomic values.
*
* This extremely dynamic case is handled by ArgumentConverter which is inserted for
* ArgumentReference that has the static type @c item(), when atomic value are asked
* for. At runtime it atomizes/let values through appropriately.
*
* @author Frans Englich <frans.englich@nokia.com>
* @ingroup Patternist_expressions
*/
class ArgumentConverter : public UntypedAtomicConverter
{
public:
ArgumentConverter(const Expression::Ptr &operand,
const ItemType::Ptr &reqType);
virtual Item evaluateSingleton(const DynamicContext::Ptr &) const;
virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &) const;
virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;
inline Item::Iterator::Ptr mapToSequence(const Item &item,
const DynamicContext::Ptr &context) const;
virtual SequenceType::List expectedOperandTypes() const;
virtual SequenceType::Ptr staticType() const;
private:
typedef QExplicitlySharedDataPointer<const ArgumentConverter> ConstPtr;
};
}
QT_END_NAMESPACE
#endif
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