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#include "qexpressionvariablereference_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

ExpressionVariableReference::ExpressionVariableReference(const VariableSlotID slotP,
                                                         const VariableDeclaration::Ptr &varDecl) : VariableReference(slotP)
                                                                                                  , m_varDecl(varDecl)
{
}

bool ExpressionVariableReference::evaluateEBV(const DynamicContext::Ptr &context) const
{
    return context->expressionVariable(slot())->evaluateEBV(context);
}

Item ExpressionVariableReference::evaluateSingleton(const DynamicContext::Ptr &context) const
{
    return context->expressionVariable(slot())->evaluateSingleton(context);
}

Item::Iterator::Ptr ExpressionVariableReference::evaluateSequence(const DynamicContext::Ptr &context) const
{
    return context->expressionVariable(slot())->evaluateSequence(context);
}
Expression::Ptr ExpressionVariableReference::typeCheck(const StaticContext::Ptr &context,
                                                       const SequenceType::Ptr &reqType)
{
    if(m_varDecl->canSourceRewrite)
        return m_varDecl->expression()->typeCheck(context, reqType);
    else
        return VariableReference::typeCheck(context, reqType);
}

Expression::ID ExpressionVariableReference::id() const
{
    return IDExpressionVariableReference;
}

ExpressionVisitorResult::Ptr ExpressionVariableReference::accept(const ExpressionVisitor::Ptr &visitor) const
{
    return visitor->visit(this);
}

SequenceType::Ptr ExpressionVariableReference::staticType() const
{
    return m_varDecl->expression()->staticType();
}

QT_END_NAMESPACE