blob: 30f225b3dbce1a37d27ce6f8e79eb7f512301b91 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/****************************************************************************
**
** 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// 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_EmptySequence_H
#define Patternist_EmptySequence_H
#include "qemptycontainer_p.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
namespace QPatternist
{
/**
* @short Implements the value instance of empty sequence: <tt>()</tt>.
*
* @author Frans Englich <frans.englich@nokia.com>
* @ingroup Patternist_xdm
*/
class EmptySequence : public EmptyContainer
{
public:
/**
* @short Creates an EmptySequence that is a replacement for @p
* replacementFor.
*
* @see EmptySequence()
*/
static Expression::Ptr create(const Expression *const replacementFor,
const StaticContext::Ptr &context);
/**
* @short Creates an instance of EmptySequence.
*
* @note In most cases create() should be used, since it takes care of
* adjusting source location annotations.
*
* @see create()
*/
inline EmptySequence()
{
}
virtual QString stringValue() const;
/**
* @returns always an empty iterator, an instance of EmptyIterator.
*/
virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &) const;
/**
* @returns always @c null.
*/
virtual Item evaluateSingleton(const DynamicContext::Ptr &) const;
/**
* Does nothing.
*/
virtual void evaluateToSequenceReceiver(const DynamicContext::Ptr &) const;
/**
* @returns always @c false.
*/
virtual bool evaluateEBV(const DynamicContext::Ptr &context) const;
/**
* @returns always CommonSequenceTypes::Empty
*/
virtual ItemType::Ptr type() const;
/**
* @returns always CommonSequenceTypes::Empty
*/
virtual SequenceType::Ptr staticType() const;
virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;
virtual ID id() const;
virtual Properties properties() const;
};
}
QT_END_NAMESPACE
QT_END_HEADER
#endif
|
