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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_NodeSortExpression_H
53 #define Patternist_NodeSortExpression_H
55 #include <private/qsinglecontainer_p.h>
64 * @short De-duplicates and sorts in document order the content that its
67 * @author Frans Englich <frans.englich@nokia.com>
68 * @ingroup Patternist_expressions
70 class NodeSortExpression : public SingleContainer
73 NodeSortExpression(const Expression::Ptr &operand);
75 virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &context) const;
76 virtual SequenceType::Ptr staticType() const;
77 virtual SequenceType::List expectedOperandTypes() const;
78 virtual Expression::Ptr compress(const StaticContext::Ptr &context);
79 virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;
80 virtual Properties properties() const;
83 * Ensures that result delivered from @p operand, is in document order.
85 static Expression::Ptr wrapAround(const Expression::Ptr &operand,
86 const StaticContext::Ptr &context);
89 static inline bool lessThanUsingNodeModel(const Item &n1,