Qt 4.8
qcurrentitemstore.cpp
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41 
42 #include "qbuiltintypes_p.h"
43 #include "qcommonsequencetypes_p.h"
44 #include "qcurrentitemcontext_p.h"
46 
47 #include "qcurrentitemstore_p.h"
48 
50 
51 using namespace QPatternist;
52 
54 {
55 }
56 
58 {
59  return DynamicContext::Ptr(new CurrentItemContext(old->contextItem(), old));
60 }
61 
63 {
64  return m_operand->evaluateEBV(createContext(context));
65 }
66 
68 {
69  return m_operand->evaluateSequence(createContext(context));
70 }
71 
73 {
74  return m_operand->evaluateSingleton(createContext(context));
75 }
76 
78 {
79  return m_operand->staticType();
80 }
81 
83 {
84  SequenceType::List result;
86  return result;
87 }
88 
90 {
91  /* It might be we are generated despite there is no focus. In that case
92  * an error will reported in case current() is used, but in any case we cannot
93  * crash, so use item() in case we have no focus.
94  *
95  * Such a case is when we're inside a named template, and it's invoked
96  * without focus. */
97  const ItemType::Ptr t(context->contextItemType());
98  return StaticContext::Ptr(new StaticCurrentContext(t ? t : BuiltinTypes::item, context));
99 }
100 
102 {
104 
105  if(me != this)
106  return me;
107  else
108  {
109  /* If fn:current() isn't called, there's no point in us sticking
110  * around. */
112  return me;
113  else
114  return m_operand;
115  }
116 }
117 
119  const SequenceType::Ptr &reqType)
120 {
121  return SingleContainer::typeCheck(newStaticContext(context), reqType);
122 }
123 
125 {
126  return visitor->visit(this);
127 }
128 
130 {
131  return m_operand->actualReflection();
132 }
133 
135 {
137 }
138 
virtual bool evaluateEBV(const DynamicContext::Ptr &) const
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
CurrentItemStore(const Expression::Ptr &operand)
static const SequenceType::Ptr ZeroOrMoreItems
static StaticContext::Ptr newStaticContext(const StaticContext::Ptr &context)
virtual bool evaluateEBV(const DynamicContext::Ptr &context) const
virtual const SourceLocationReflection * actualReflection() const
Returns this.
virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context, const SequenceType::Ptr &reqType)
Definition: qexpression.cpp:70
bool testFlag(Enum f) const
Returns true if the flag is set, otherwise false.
Definition: qglobal.h:2345
virtual SequenceType::Ptr staticType() const
virtual Expression::Ptr compress(const StaticContext::Ptr &context)
virtual const SourceLocationReflection * actualReflection() const
Returns this.
virtual Item contextItem() const =0
void append(const T &t)
Inserts value at the end of the list.
Definition: qlist.h:507
DynamicContext::Ptr createContext(const DynamicContext::Ptr &old) const
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context, const SequenceType::Ptr &reqType)
static const ItemType::Ptr item
The namespace for the internal API of QtXmlPatterns.
A StaticContext that carries a specified static type for the current item, as returned by fn:current(...
A DynamicContext that maintains the focus, a sequence of items.
virtual SequenceType::Ptr staticType() const =0
virtual SequenceType::List expectedOperandTypes() const
Represents an item in the XPath 2.0 Data Model.
Definition: qitem_p.h:182
virtual Properties properties() const
virtual Item evaluateSingleton(const DynamicContext::Ptr &) const
Properties deepProperties() const
Computes the union of properties for this Expression and all its descending children.
virtual Properties properties() const
virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const
QExplicitlySharedDataPointer< DynamicContext > Ptr
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
QExplicitlySharedDataPointer< StaticContext > Ptr
virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const
The QList class is a template class that provides lists.
Definition: qdatastream.h:62
Base class for all instances that represents something at a certain location.
virtual Expression::Ptr compress(const StaticContext::Ptr &context)
virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &context) const
Base class for expressions that has exactly one operand.
virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &) const