source: trunk/src/xmlpatterns/data/qatomiccomparator_p.h@ 1036

Last change on this file since 1036 was 846, checked in by Dmitry A. Kuminov, 14 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.

File size: 7.6 KB
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1/****************************************************************************
2**
3** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation ([email protected])
6**
7** This file is part of the QtXmlPatterns module of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
10** Commercial Usage
11** Licensees holding valid Qt Commercial licenses may use this file in
12** accordance with the Qt Commercial License Agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and Nokia.
15**
16** GNU Lesser General Public License Usage
17** Alternatively, this file may be used under the terms of the GNU Lesser
18** General Public License version 2.1 as published by the Free Software
19** Foundation and appearing in the file LICENSE.LGPL included in the
20** packaging of this file. Please review the following information to
21** ensure the GNU Lesser General Public License version 2.1 requirements
22** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
23**
24** In addition, as a special exception, Nokia gives you certain additional
25** rights. These rights are described in the Nokia Qt LGPL Exception
26** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you have questions regarding the use of this file, please contact
37** Nokia at [email protected].
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42//
43// W A R N I N G
44// -------------
45//
46// This file is not part of the Qt API. It exists purely as an
47// implementation detail. This header file may change from version to
48// version without notice, or even be removed.
49//
50// We mean it.
51
52#ifndef Patternist_AtomicComparator_H
53#define Patternist_AtomicComparator_H
54
55#include <QFlags>
56
57#include "qitem_p.h"
58#include "qatomictypedispatch_p.h"
59
60QT_BEGIN_HEADER
61
62QT_BEGIN_NAMESPACE
63
64class QString;
65
66namespace QPatternist
67{
68
69 /**
70 * @short Base class for classes responsible of comparing two atomic values.
71 *
72 * This class is also known as the AtomicParrot.
73 *
74 * @ingroup Patternist_xdm
75 * @author Frans Englich <[email protected]>
76 */
77 class Q_AUTOTEST_EXPORT AtomicComparator : public AtomicTypeVisitorResult
78 {
79 public:
80 AtomicComparator();
81 virtual ~AtomicComparator();
82
83 typedef QExplicitlySharedDataPointer<AtomicComparator> Ptr;
84
85 /**
86 * Identifies operators used in value comparisons.
87 *
88 * The enum values are bit-significant.
89 *
90 * @see <a href="http://www.w3.org/TR/xpath20/#id-value-comparisons">W3C XML Path
91 * Language (XPath) 2.0, 3.5.1 Value Comparisons</a>
92 */
93 enum Operator
94 {
95 /**
96 * Operator <tt>eq</tt> and <tt>=</tt>.
97 */
98 OperatorEqual = 1,
99
100 /**
101 * Operator <tt>ne</tt> and <tt>!=</tt>.
102 */
103 OperatorNotEqual = 1 << 1,
104
105 /**
106 * Operator <tt>gt</tt> and <tt>\></tt>.
107 */
108 OperatorGreaterThan = 1 << 2,
109
110 /**
111 * Operator <tt>lt</tt> and <tt>\<</tt>.
112 */
113 OperatorLessThan = 1 << 3,
114
115 /**
116 * One of the operators we use for sorting. The only difference from
117 * OperatorLessThan is that it sees NaN as ordered and smaller than
118 * other numbers.
119 */
120 OperatorLessThanNaNLeast = 1 << 4,
121
122 /**
123 * One of the operators we use for sorting. The only difference from
124 * OperatorLessThanLeast is that it sees NaN as ordered and larger than
125 * other numbers.