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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 | |
46 | QT_BEGIN_NAMESPACE |
47 | |
48 | using namespace QPatternist; |
49 | |
50 | QuantifiedExpression::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 | |
61 | Item 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 | |
68 | bool 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 | |
104 | QString 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 | |
115 | SequenceType::Ptr QuantifiedExpression::staticType() const |
116 | { |
117 | return CommonSequenceTypes::ExactlyOneBoolean; |
118 | } |
119 | |
120 | SequenceType::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 | |
128 | QuantifiedExpression::Operator QuantifiedExpression::operatorID() const |
129 | { |
130 | return m_quantifier; |
131 | } |
132 | |
133 | ExpressionVisitorResult::Ptr QuantifiedExpression::accept(const ExpressionVisitor::Ptr &visitor) const |
134 | { |
135 | return visitor->visit(this); |
136 | } |
137 | |
138 | QT_END_NAMESPACE |
139 | |