1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the QtXmlPatterns module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
39
40//
41// W A R N I N G
42// -------------
43//
44// This file is not part of the Qt API. It exists purely as an
45// implementation detail. This header file may change from version to
46// version without notice, or even be removed.
47//
48// We mean it.
49
50#ifndef Patternist_ExpressionVariableReference_H
51#define Patternist_ExpressionVariableReference_H
52
53#include <private/qvariabledeclaration_p.h>
54#include <private/qvariablereference_p.h>
55
56QT_BEGIN_NAMESPACE
57
58namespace QPatternist
59{
60 /**
61 * @short A reference to a variable declared with <tt>declare variable</tt> or @c let.
62 *
63 * It's also used by variable bindings in @c case branches of the @c typeswitch
64 * expression.
65 *
66 * This AST node is only used up until the typeCheck() stage. Therefore it
67 * has no functions for evaluation, such as evaluateSequence().
68 *
69 * @author Frans Englich <frans.englich@nokia.com>
70 * @ingroup Patternist_expressions
71 */
72 class ExpressionVariableReference : public VariableReference
73 {
74 public:
75 ExpressionVariableReference(const VariableSlotID slot,
76 const VariableDeclaration *varDecl);
77
78 virtual bool evaluateEBV(const DynamicContext::Ptr &context) const;
79 virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
80 virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &context) const;
81
82 virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context,
83 const SequenceType::Ptr &reqType);
84 virtual SequenceType::Ptr staticType() const;
85 virtual ID id() const;
86 virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;
87
88 inline const Expression::Ptr &sourceExpression() const;
89 inline const VariableDeclaration *variableDeclaration() const;
90 private:
91 const VariableDeclaration *m_varDecl;
92 };
93
94 inline const Expression::Ptr &ExpressionVariableReference::sourceExpression() const
95 {
96 return m_varDecl->expression();
97 }
98
99 inline const VariableDeclaration *ExpressionVariableReference::variableDeclaration() const
100 {
101 return m_varDecl;
102 }
103
104}
105
106QT_END_NAMESPACE
107
108#endif
109

source code of qtxmlpatterns/src/xmlpatterns/expr/qexpressionvariablereference_p.h