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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.
52 #ifndef Patternist_PositionVariableReference_H
53 #define Patternist_PositionVariableReference_H
55 #include <private/qvariablereference_p.h>
64 * @short A reference to an @c at variable, declared with the
65 * <tt>for</tt>-part in XQuery's FLWOR expression.
67 * @author Frans Englich <frans.englich@nokia.com>
68 * @ingroup Patternist_expressions
70 class PositionalVariableReference : public VariableReference
73 typedef QExplicitlySharedDataPointer<PositionalVariableReference> Ptr;
74 PositionalVariableReference(const VariableSlotID slot);
76 virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
79 * Returns always @c true, since a positional variable is always one or more, and the
80 * Effective %Boolean Value for that range is always @c true.
82 * @returns always @c true
84 virtual bool evaluateEBV(const DynamicContext::Ptr &context) const;
87 * @returns always CommonSequenceTypes::ExactlyOneInteger
89 virtual SequenceType::Ptr staticType() const;
91 virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;
92 virtual Properties properties() const;