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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_BooleanFNs_H
51#define Patternist_BooleanFNs_H
52
53#include <private/qfunctioncall_p.h>
54
55/**
56 * @file
57 * @short Contains classes implementing the functions found in
58 * <a href="http://www.w3.org/TR/xpath-functions/#boolean-functions">XQuery 1.0 and
59 * XPath 2.0 Functions and Operators, 9 Functions and Operators on Boolean Values</a>.
60 *
61 * @ingroup Patternist_functions
62 */
63
64QT_BEGIN_NAMESPACE
65
66namespace QPatternist
67{
68
69 /**
70 * @short Implements the function <tt>fn:true()</tt>.
71 *
72 * The implementation always rewrites itself to a boolean value at compile time.
73 *
74 * @ingroup Patternist_functions
75 * @author Frans Englich <frans.englich@nokia.com>
76 */
77 class TrueFN : public FunctionCall
78 {
79 public:
80 virtual bool evaluateEBV(const DynamicContext::Ptr &context) const;
81 };
82
83 /**
84 * @short Implements the function <tt>fn:false()</tt>.
85 *
86 * The implementation always rewrites itself to a boolean value at compile time.
87 *
88 * @ingroup Patternist_functions
89 * @author Frans Englich <frans.englich@nokia.com>
90 */
91 class FalseFN : public FunctionCall
92 {
93 public:
94 virtual bool evaluateEBV(const DynamicContext::Ptr &context) const;
95 };
96
97 /**
98 * @short Implements the function <tt>fn:not()</tt>.
99 *
100 * @ingroup Patternist_functions
101 * @author Frans Englich <frans.englich@nokia.com>
102 */
103 class NotFN : public FunctionCall
104 {
105 public:
106 virtual bool evaluateEBV(const DynamicContext::Ptr &context) const;
107 virtual QList<QExplicitlySharedDataPointer<OptimizationPass> > optimizationPasses() const;
108 };
109}
110
111QT_END_NAMESPACE
112
113#endif
114

source code of qtxmlpatterns/src/xmlpatterns/functions/qbooleanfns_p.h