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) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/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 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, Digia gives you certain additional
** rights. These rights are described in the Digia 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// 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_GeneralComparison_H
#define Patternist_GeneralComparison_H
#include "qatomiccomparator_p.h"
#include "qpaircontainer_p.h"
#include "qcomparisonplatform_p.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
namespace QPatternist
{
/**
* @short Implements XPath 2.0's general comparions, such as the <tt>=</tt> operator.
*
* ComparisonPlatform is inherited with @c protected scope because ComparisonPlatform
* must access members of GeneralComparison.
*
* @see <a href="http://www.w3.org/TR/xpath20/#id-general-comparisons">XML Path Language
* (XPath) 2.0, 3.5.2 General Comparisons</a>
* @author Frans Englich <frans.englich@nokia.com>
* @ingroup Patternist_expressions
*/
class GeneralComparison : public PairContainer,
public ComparisonPlatform<GeneralComparison,
true /* We want to report errors. */,
AtomicComparator::AsGeneralComparison>
{
public:
GeneralComparison(const Expression::Ptr &op1,
const AtomicComparator::Operator op,
const Expression::Ptr &op2,
const bool isBackwardsCompat = false);
virtual bool evaluateEBV(const DynamicContext::Ptr &) const;
virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context,
const SequenceType::Ptr &reqType);
virtual SequenceType::List expectedOperandTypes() const;
virtual SequenceType::Ptr staticType() const;
virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;
/**
* @returns always IDGeneralComparison
*/
virtual ID id() const;
virtual QList<QExplicitlySharedDataPointer<OptimizationPass> > optimizationPasses() const;
/**
* @returns the operator that this GeneralComparison is using.
*/
inline AtomicComparator::Operator operatorID() const
{
return m_operator;
}
/**
* Overridden to optimize case-insensitive compares.
*/
virtual Expression::Ptr compress(const StaticContext::Ptr &context);
private:
static inline void updateType(ItemType::Ptr &type,
const Expression::Ptr &source);
AtomicComparator::Ptr fetchGeneralComparator(Expression::Ptr &op1,
Expression::Ptr &op2,
const ReportContext::Ptr &context) const;
bool generalCompare(const Item &op1,
const Item &op2,
const DynamicContext::Ptr &context) const;
const AtomicComparator::Operator m_operator;
const bool m_isBackwardsCompat;
};
}
QT_END_NAMESPACE
QT_END_HEADER
#endif
|
