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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_TraceFN_H
51#define Patternist_TraceFN_H
52
53#include <private/qfunctioncall_p.h>
54
55QT_BEGIN_NAMESPACE
56
57namespace QPatternist
58{
59 /**
60 * @short Implements the function <tt>fn:trace()</tt>.
61 * @ingroup Patternist_functions
62 * @author Frans Englich <frans.englich@nokia.com>
63 */
64 class TraceFN : public FunctionCall
65 {
66 public:
67 virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
68 virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &context) const;
69
70 /**
71 * Formally speaking, the type inference is:
72 *
73@verbatim
74statEnv |- (FN-URI,"trace")(Type) : prime(Type) * quantifier(Type)
75@endverbatim
76 *
77 * @see <a href="http://www.w3.org/TR/xquery-semantics/#sec_fn_reverse">XQuery 1.0
78 * and XPath 2.0 Formal Semantics, 7.2.12 The fn:reverse function</a>, for
79 * an example of where the type inference is used
80 * @returns the static type of the function's first argument.
81 */
82 virtual SequenceType::Ptr staticType() const;
83 };
84}
85
86QT_END_NAMESPACE
87
88#endif
89

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