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42 #include "qboolean_p.h"
43 #include "qcommonsequencetypes_p.h"
44 #include "qcommonvalues_p.h"
45 #include "qliteral_p.h"
47 #include "qandexpression_p.h"
51 using namespace QPatternist;
53 AndExpression::AndExpression(const Expression::Ptr &operand1,
54 const Expression::Ptr &operand2) : PairContainer(operand1, operand2)
58 bool AndExpression::evaluateEBV(const DynamicContext::Ptr &context) const
60 return m_operand1->evaluateEBV(context) && m_operand2->evaluateEBV(context);
63 Expression::Ptr AndExpression::compress(const StaticContext::Ptr &context)
65 const Expression::Ptr newMe(PairContainer::compress(context));
70 /* Both operands mustn't be evaluated in order to be able to compress. */
71 if(m_operand1->isEvaluated() && !m_operand1->evaluateEBV(context->dynamicContext()))
72 return wrapLiteral(CommonValues::BooleanFalse, context, this);
73 else if(m_operand2->isEvaluated() && !m_operand2->evaluateEBV(context->dynamicContext()))
74 return wrapLiteral(CommonValues::BooleanFalse, context, this);
76 return Expression::Ptr(this);
79 SequenceType::List AndExpression::expectedOperandTypes() const
81 SequenceType::List result;
82 result.append(CommonSequenceTypes::EBV);
83 result.append(CommonSequenceTypes::EBV);
87 SequenceType::Ptr AndExpression::staticType() const
89 return CommonSequenceTypes::ExactlyOneBoolean;
92 ExpressionVisitorResult::Ptr AndExpression::accept(const ExpressionVisitor::Ptr &visitor) const
94 return visitor->visit(this);