Qt 4.8
qcontextitem.cpp
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41 
42 #include "qbuiltintypes_p.h"
43 #include "qcommonsequencetypes_p.h"
44 #include "qgenericsequencetype_p.h"
45 
46 #include "qcontextitem_p.h"
47 
49 
50 using namespace QPatternist;
51 
53 {
54  return context->contextItem();
55 }
56 
58 {
59  m_itemType = context->contextItemType();
60  return EmptyContainer::compress(context);
61 }
62 
64  const SequenceType::Ptr &reqType)
65 {
66  m_itemType = context->contextItemType();
67  return EmptyContainer::typeCheck(context, reqType);
68 }
69 
71 {
72  /* We test m_itemType here because Patternist View calls staticType() before the typeCheck()
73  * stage. */
74  if(m_itemType)
75  return makeGenericSequenceType(m_itemType, Cardinality::exactlyOne());
76  else
78 }
79 
81 {
83 }
84 
86 {
87  return visitor->visit(this);
88 }
89 
91 {
92  return IDContextItem;
93 }
94 
96 {
97  return BuiltinTypes::item;
98 }
99 
101 {
102  if(m_expr)
103  return m_expr.data();
104  else
105  return this;
106 }
107 
109 {
110  Q_ASSERT(type);
111  m_itemType = type;
112 }
113 
int type
Definition: qmetatype.cpp:239
const Expression::Ptr m_expr
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
virtual Expression::Properties properties() const
virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context, const SequenceType::Ptr &reqType)
Definition: qexpression.cpp:70
#define Q_ASSERT(cond)
Definition: qglobal.h:1823
virtual void announceFocusType(const ItemType::Ptr &type)
virtual Expression::Ptr compress(const StaticContext::Ptr &context)
virtual ID id() const
virtual Item contextItem() const =0
T * data() const
Returns a pointer to the shared data object.
Definition: qshareddata.h:145
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
virtual ItemType::Ptr expectedContextItemType() const
virtual Expression::Ptr compress(const StaticContext::Ptr &context)
static const ItemType::Ptr item
The namespace for the internal API of QtXmlPatterns.
virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context, const SequenceType::Ptr &reqType)
Represents an item in the XPath 2.0 Data Model.
Definition: qitem_p.h:182
virtual SequenceType::Ptr staticType() const
static const SequenceType::Ptr ExactlyOneItem
virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const
static Cardinality exactlyOne()
virtual ItemType::Ptr contextItemType() const =0
The static type of the context item.
The QFlags class provides a type-safe way of storing OR-combinations of enum values.
Definition: qglobal.h:2313
virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const
virtual const SourceLocationReflection * actualReflection() const
Returns this.
Base class for all instances that represents something at a certain location.