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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_VariableReference_H
51#define Patternist_VariableReference_H
52
53#include <private/qemptycontainer_p.h>
54
55QT_BEGIN_NAMESPACE
56
57template<typename T> class QList;
58
59namespace QPatternist
60{
61 /**
62 * @short Baseclass for classes being references to variables.
63 *
64 * @author Frans Englich <frans.englich@nokia.com>
65 * @ingroup Patternist_expressions
66 */
67 class Q_AUTOTEST_EXPORT VariableReference : public EmptyContainer
68 {
69 public:
70 typedef QExplicitlySharedDataPointer<VariableReference> Ptr;
71 typedef QList<VariableReference::Ptr> List;
72
73 /**
74 * Creates a VariableReference.
75 *
76 * @param slot must be a valid slot. That is, zero or larger.
77 */
78 VariableReference(const VariableSlotID slot);
79 ~VariableReference();
80
81 /**
82 * @returns the slot that this reference communicates through.
83 *
84 * This is a slot in the DynamicContext. Which one, depends on the
85 * type, which this VariableReference does not have information about.
86 * For instance, it could DynamicContext::expressionVariable() or
87 * DynamicContext::rangeVariable().
88 */
89 inline VariableSlotID slot() const;
90
91 /**
92 * @returns DisableElimination
93 */
94 virtual Properties properties() const;
95
96 private:
97 /**
98 * The slot. Same as returned by slot().
99 *
100 * This variable is not called m_slot, because that creates a weird
101 * compiler error on hpuxi-acc. See the preprocessor output. EvaluationCache::m_varSlot
102 * is a similar workaround.
103 */
104 const VariableSlotID m_varSlot;
105 };
106
107 inline VariableSlotID VariableReference::slot() const
108 {
109 return m_varSlot;
110 }
111
112}
113
114QT_END_NAMESPACE
115
116#endif
117

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