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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_ExpressionVariableReference_H
#define Patternist_ExpressionVariableReference_H
#include <private/qvariabledeclaration_p.h>
#include <private/qvariablereference_p.h>
QT_BEGIN_NAMESPACE
namespace QPatternist
{
/**
* @short A reference to a variable declared with <tt>declare variable</tt> or @c let.
*
* It's also used by variable bindings in @c case branches of the @c typeswitch
* expression.
*
* This AST node is only used up until the typeCheck() stage. Therefore it
* has no functions for evaluation, such as evaluateSequence().
*
* @author Frans Englich <frans.englich@nokia.com>
* @ingroup Patternist_expressions
*/
class ExpressionVariableReference : public VariableReference
{
public:
ExpressionVariableReference(const VariableSlotID slot,
const VariableDeclaration *varDecl);
bool evaluateEBV(const DynamicContext::Ptr &context) const override;
Item evaluateSingleton(const DynamicContext::Ptr &context) const override;
Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &context) const override;
Expression::Ptr typeCheck(const StaticContext::Ptr &context,
const SequenceType::Ptr &reqType) override;
SequenceType::Ptr staticType() const override;
ID id() const override;
ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const override;
inline const Expression::Ptr &sourceExpression() const;
inline const VariableDeclaration *variableDeclaration() const;
private:
const VariableDeclaration *m_varDecl;
};
inline const Expression::Ptr &ExpressionVariableReference::sourceExpression() const
{
return m_varDecl->expression();
}
inline const VariableDeclaration *ExpressionVariableReference::variableDeclaration() const
{
return m_varDecl;
}
}
QT_END_NAMESPACE
#endif
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