|
1 /**************************************************************************** |
|
2 ** |
|
3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
|
4 ** All rights reserved. |
|
5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
|
6 ** |
|
7 ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
|
8 ** |
|
9 ** $QT_BEGIN_LICENSE:LGPL$ |
|
10 ** No Commercial Usage |
|
11 ** This file contains pre-release code and may not be distributed. |
|
12 ** You may use this file in accordance with the terms and conditions |
|
13 ** contained in the Technology Preview License Agreement accompanying |
|
14 ** this package. |
|
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 ** If you have questions regarding the use of this file, please contact |
|
29 ** Nokia at qt-info@nokia.com. |
|
30 ** |
|
31 ** |
|
32 ** |
|
33 ** |
|
34 ** |
|
35 ** |
|
36 ** |
|
37 ** |
|
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_ComparingAggregator_H |
|
53 #define Patternist_ComparingAggregator_H |
|
54 |
|
55 /** |
|
56 * @file qcomparingaggregator_p.h |
|
57 * @short Contains the implementations for the functions <tt>fn:max()</tt>, MaxFN, |
|
58 * and <tt>fn:min()</tt>, MinFN, and the class ComparingAggregator. |
|
59 */ |
|
60 |
|
61 #include "qabstractfloat_p.h" |
|
62 #include "qdecimal_p.h" |
|
63 #include "qcastingplatform_p.h" |
|
64 #include "qcomparisonplatform_p.h" |
|
65 #include "qliteral_p.h" |
|
66 #include "qaggregator_p.h" |
|
67 #include "quntypedatomicconverter_p.h" |
|
68 #include "qpatternistlocale_p.h" |
|
69 |
|
70 QT_BEGIN_HEADER |
|
71 |
|
72 QT_BEGIN_NAMESPACE |
|
73 |
|
74 namespace QPatternist |
|
75 { |
|
76 /** |
|
77 * @short Base class for the implementations of the <tt>fn:min()</tt> and <tt>fn:max()</tt> function. |
|
78 * |
|
79 * What function that more specifically is |
|
80 * followed, depends on how the constructor is called. |
|
81 * |
|
82 * @see MaxFN |
|
83 * @see MinFN |
|
84 * @ingroup Patternist_functions |
|
85 * @author Frans Englich <frans.englich@nokia.com> |
|
86 */ |
|
87 template <AtomicComparator::Operator oper, AtomicComparator::ComparisonResult result> |
|
88 class ComparingAggregator : public Aggregator, |
|
89 public ComparisonPlatform<ComparingAggregator<oper, result>, |
|
90 true, AtomicComparator::AsValueComparison, |
|
91 ReportContext::FORG0006>, |
|
92 public CastingPlatform<ComparingAggregator<oper, result>, true> |
|
93 { |
|
94 public: |
|
95 virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; |
|
96 virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context, |
|
97 const SequenceType::Ptr &reqType); |
|
98 |
|
99 inline AtomicComparator::Operator operatorID() const |
|
100 { |
|
101 return oper; |
|
102 } |
|
103 |
|
104 inline ItemType::Ptr targetType() const |
|
105 { |
|
106 return BuiltinTypes::xsDouble; |
|
107 } |
|
108 |
|
109 private: |
|
110 inline Item applyNumericPromotion(const Item &old, |
|
111 const Item &nev, |
|
112 const Item &newVal) const; |
|
113 |
|
114 using ComparisonPlatform<ComparingAggregator<oper, result>, |
|
115 true, |
|
116 AtomicComparator::AsValueComparison, |
|
117 ReportContext::FORG0006>::comparator; |
|
118 using ComparisonPlatform<ComparingAggregator<oper, result>, |
|
119 true, |
|
120 AtomicComparator::AsValueComparison, |
|
121 ReportContext::FORG0006>::fetchComparator; |
|
122 using CastingPlatform<ComparingAggregator<oper, result>, true>::cast; |
|
123 }; |
|
124 |
|
125 #include "qcomparingaggregator.cpp" |
|
126 |
|
127 /** |
|
128 * @short An instantiation of ComparingAggregator suitable for <tt>fn:max()</tt>. |
|
129 * |
|
130 * @ingroup Patternist_functions |
|
131 */ |
|
132 typedef ComparingAggregator<AtomicComparator::OperatorGreaterThan, AtomicComparator::GreaterThan> MaxFN; |
|
133 |
|
134 /** |
|
135 * @short An instantiation of ComparingAggregator suitable for <tt>fn:max()</tt>. |
|
136 * |
|
137 * @ingroup Patternist_functions |
|
138 */ |
|
139 typedef ComparingAggregator<AtomicComparator::OperatorLessThan, AtomicComparator::LessThan> MinFN; |
|
140 } |
|
141 |
|
142 QT_END_NAMESPACE |
|
143 |
|
144 QT_END_HEADER |
|
145 |
|
146 #endif |