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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_NodeSortExpression_H
51#define Patternist_NodeSortExpression_H
52
53#include <private/qsinglecontainer_p.h>
54
55QT_BEGIN_NAMESPACE
56
57namespace QPatternist
58{
59 /**
60 * @short De-duplicates and sorts in document order the content that its
61 * operand returns.
62 *
63 * @author Frans Englich <frans.englich@nokia.com>
64 * @ingroup Patternist_expressions
65 */
66 class NodeSortExpression : public SingleContainer
67 {
68 public:
69 NodeSortExpression(const Expression::Ptr &operand);
70
71 virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &context) const;
72 virtual SequenceType::Ptr staticType() const;
73 virtual SequenceType::List expectedOperandTypes() const;
74 virtual Expression::Ptr compress(const StaticContext::Ptr &context);
75 virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;
76 virtual Properties properties() const;
77
78 /**
79 * Ensures that result delivered from @p operand, is in document order.
80 */
81 static Expression::Ptr wrapAround(const Expression::Ptr &operand,
82 const StaticContext::Ptr &context);
83
84 private:
85 static inline bool lessThanUsingNodeModel(const Item &n1,
86 const Item &n2);
87 };
88}
89
90QT_END_NAMESPACE
91
92#endif
93

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