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_ComparingAggregator_H |
51 | #define Patternist_ComparingAggregator_H |
52 | |
53 | /** |
54 | * @file qcomparingaggregator_p.h |
55 | * @short Contains the implementations for the functions <tt>fn:max()</tt>, MaxFN, |
56 | * and <tt>fn:min()</tt>, MinFN, and the class ComparingAggregator. |
57 | */ |
58 | |
59 | #include <private/qabstractfloat_p.h> |
60 | #include <private/qdecimal_p.h> |
61 | #include <private/qcastingplatform_p.h> |
62 | #include <private/qcomparisonplatform_p.h> |
63 | #include <private/qliteral_p.h> |
64 | #include <private/qaggregator_p.h> |
65 | #include <private/quntypedatomicconverter_p.h> |
66 | #include <private/qpatternistlocale_p.h> |
67 | |
68 | QT_BEGIN_NAMESPACE |
69 | |
70 | namespace QPatternist |
71 | { |
72 | /** |
73 | * @short Base class for the implementations of the <tt>fn:min()</tt> and <tt>fn:max()</tt> function. |
74 | * |
75 | * What function that more specifically is |
76 | * followed, depends on how the constructor is called. |
77 | * |
78 | * @see MaxFN |
79 | * @see MinFN |
80 | * @ingroup Patternist_functions |
81 | * @author Frans Englich <frans.englich@nokia.com> |
82 | */ |
83 | template <AtomicComparator::Operator oper, AtomicComparator::ComparisonResult result> |
84 | class ComparingAggregator : public Aggregator, |
85 | public ComparisonPlatform<ComparingAggregator<oper, result>, |
86 | true, AtomicComparator::AsValueComparison, |
87 | ReportContext::FORG0006>, |
88 | public CastingPlatform<ComparingAggregator<oper, result>, true> |
89 | { |
90 | public: |
91 | virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; |
92 | virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context, |
93 | const SequenceType::Ptr &reqType); |
94 | |
95 | inline AtomicComparator::Operator operatorID() const |
96 | { |
97 | return oper; |
98 | } |
99 | |
100 | inline ItemType::Ptr targetType() const |
101 | { |
102 | return BuiltinTypes::xsDouble; |
103 | } |
104 | |
105 | private: |
106 | inline Item applyNumericPromotion(const Item &old, |
107 | const Item &nev, |
108 | const Item &newVal) const; |
109 | |
110 | using ComparisonPlatform<ComparingAggregator<oper, result>, |
111 | true, |
112 | AtomicComparator::AsValueComparison, |
113 | ReportContext::FORG0006>::comparator; |
114 | using ComparisonPlatform<ComparingAggregator<oper, result>, |
115 | true, |
116 | AtomicComparator::AsValueComparison, |
117 | ReportContext::FORG0006>::fetchComparator; |
118 | using CastingPlatform<ComparingAggregator<oper, result>, true>::cast; |
119 | }; |
120 | |
121 | #include "qcomparingaggregator_tpl_p.h" |
122 | |
123 | /** |
124 | * @short An instantiation of ComparingAggregator suitable for <tt>fn:max()</tt>. |
125 | * |
126 | * @ingroup Patternist_functions |
127 | */ |
128 | typedef ComparingAggregator<AtomicComparator::OperatorGreaterThan, AtomicComparator::GreaterThan> MaxFN; |
129 | |
130 | /** |
131 | * @short An instantiation of ComparingAggregator suitable for <tt>fn:max()</tt>. |
132 | * |
133 | * @ingroup Patternist_functions |
134 | */ |
135 | typedef ComparingAggregator<AtomicComparator::OperatorLessThan, AtomicComparator::LessThan> MinFN; |
136 | } |
137 | |
138 | QT_END_NAMESPACE |
139 | |
140 | #endif |
141 | |