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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_PositionVariableReference_H
51#define Patternist_PositionVariableReference_H
52
53#include <private/qvariablereference_p.h>
54
55QT_BEGIN_NAMESPACE
56
57namespace QPatternist
58{
59 /**
60 * @short A reference to an @c at variable, declared with the
61 * <tt>for</tt>-part in XQuery's FLWOR expression.
62 *
63 * @author Frans Englich <frans.englich@nokia.com>
64 * @ingroup Patternist_expressions
65 */
66 class PositionalVariableReference : public VariableReference
67 {
68 public:
69 typedef QExplicitlySharedDataPointer<PositionalVariableReference> Ptr;
70 PositionalVariableReference(const VariableSlotID slot);
71
72 virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
73
74 /**
75 * Returns always @c true, since a positional variable is always one or more, and the
76 * Effective %Boolean Value for that range is always @c true.
77 *
78 * @returns always @c true
79 */
80 virtual bool evaluateEBV(const DynamicContext::Ptr &context) const;
81
82 /**
83 * @returns always CommonSequenceTypes::ExactlyOneInteger
84 */
85 virtual SequenceType::Ptr staticType() const;
86
87 virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;
88 virtual Properties properties() const;
89 };
90}
91
92QT_END_NAMESPACE
93
94#endif
95

source code of qtxmlpatterns/src/xmlpatterns/expr/qpositionalvariablereference_p.h