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39
40#include "qcommonsequencetypes_p.h"
41#include "qgenericsequencetype_p.h"
42#include "qitemmappingiterator_p.h"
43
44#include "qquantifiedexpression_p.h"
45
46QT_BEGIN_NAMESPACE
47
48using namespace QPatternist;
49
50QuantifiedExpression::QuantifiedExpression(const VariableSlotID varSlot,
51 const Operator quantifier,
52 const Expression::Ptr &inClause,
53 const Expression::Ptr &testExpression)
54 : PairContainer(inClause, testExpression),
55 m_varSlot(varSlot),
56 m_quantifier(quantifier)
57{
58 Q_ASSERT(quantifier == Some || quantifier == Every);
59}
60
61Item QuantifiedExpression::mapToItem(const Item &item,
62 const DynamicContext::Ptr &context) const
63{
64 context->setRangeVariable(slot: m_varSlot, newValue: item);
65 return item;
66}
67
68bool QuantifiedExpression::evaluateEBV(const DynamicContext::Ptr &context) const
69{
70 const Item::Iterator::Ptr it(makeItemMappingIterator<Item>(mapper: ConstPtr(this),
71 source: m_operand1->evaluateSequence(context),
72 context));
73
74 Item item(it->next());
75
76 if(m_quantifier == Some)
77 {
78 while(item)
79 {
80 if(m_operand2->evaluateEBV(context))
81 return true;
82 else
83 item = it->next();
84 };
85
86 return false;
87 }
88 else
89 {
90 Q_ASSERT(m_quantifier == Every);
91
92 while(item)
93 {
94 if(m_operand2->evaluateEBV(context))
95 item = it->next();
96 else
97 return false;
98 }
99
100 return true;
101 }
102}
103
104QString QuantifiedExpression::displayName(const Operator quantifier)
105{
106 if(quantifier == Some)
107 return QLatin1String("some");
108 else
109 {
110 Q_ASSERT(quantifier == Every);
111 return QLatin1String("every");
112 }
113}
114
115SequenceType::Ptr QuantifiedExpression::staticType() const
116{
117 return CommonSequenceTypes::ExactlyOneBoolean;
118}
119
120SequenceType::List QuantifiedExpression::expectedOperandTypes() const
121{
122 SequenceType::List result;
123 result.append(t: CommonSequenceTypes::ZeroOrMoreItems);
124 result.append(t: CommonSequenceTypes::EBV);
125 return result;
126}
127
128QuantifiedExpression::Operator QuantifiedExpression::operatorID() const
129{
130 return m_quantifier;
131}
132
133ExpressionVisitorResult::Ptr QuantifiedExpression::accept(const ExpressionVisitor::Ptr &visitor) const
134{
135 return visitor->visit(this);
136}
137
138QT_END_NAMESPACE
139

source code of qtxmlpatterns/src/xmlpatterns/expr/qquantifiedexpression.cpp