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| ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
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| |
| #include "qcommonsequencetypes_p.h" |
| #include "qgenericsequencetype_p.h" |
| #include "qitemmappingiterator_p.h" |
| |
| #include "qquantifiedexpression_p.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| using namespace QPatternist; |
| |
| QuantifiedExpression::QuantifiedExpression(const VariableSlotID varSlot, |
| const Operator quantifier, |
| const Expression::Ptr &inClause, |
| const Expression::Ptr &testExpression) |
| : PairContainer(inClause, testExpression), |
| m_varSlot(varSlot), |
| m_quantifier(quantifier) |
| { |
| Q_ASSERT(quantifier == Some || quantifier == Every); |
| } |
| |
| Item QuantifiedExpression::mapToItem(const Item &item, |
| const DynamicContext::Ptr &context) const |
| { |
| context->setRangeVariable(m_varSlot, item); |
| return item; |
| } |
| |
| bool QuantifiedExpression::evaluateEBV(const DynamicContext::Ptr &context) const |
| { |
| const Item::Iterator::Ptr it(makeItemMappingIterator<Item>(ConstPtr(this), |
| m_operand1->evaluateSequence(context), |
| context)); |
| |
| Item item(it->next()); |
| |
| if(m_quantifier == Some) |
| { |
| while(item) |
| { |
| if(m_operand2->evaluateEBV(context)) |
| return true; |
| else |
| item = it->next(); |
| }; |
| |
| return false; |
| } |
| else |
| { |
| Q_ASSERT(m_quantifier == Every); |
| |
| while(item) |
| { |
| if(m_operand2->evaluateEBV(context)) |
| item = it->next(); |
| else |
| return false; |
| } |
| |
| return true; |
| } |
| } |
| |
| QString QuantifiedExpression::displayName(const Operator quantifier) |
| { |
| if(quantifier == Some) |
| return QLatin1String("some"); |
| else |
| { |
| Q_ASSERT(quantifier == Every); |
| return QLatin1String("every"); |
| } |
| } |
| |
| SequenceType::Ptr QuantifiedExpression::staticType() const |
| { |
| return CommonSequenceTypes::ExactlyOneBoolean; |
| } |
| |
| SequenceType::List QuantifiedExpression::expectedOperandTypes() const |
| { |
| SequenceType::List result; |
| result.append(CommonSequenceTypes::ZeroOrMoreItems); |
| result.append(CommonSequenceTypes::EBV); |
| return result; |
| } |
| |
| QuantifiedExpression::Operator QuantifiedExpression::operatorID() const |
| { |
| return m_quantifier; |
| } |
| |
| ExpressionVisitorResult::Ptr QuantifiedExpression::accept(const ExpressionVisitor::Ptr &visitor) const |
| { |
| return visitor->visit(this); |
| } |
| |
| QT_END_NAMESPACE |