source: trunk/src/xmlpatterns/expr/qgeneralcomparison.cpp@ 617

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#include "qbuiltintypes_p.h"
#include "qcommonsequencetypes_p.h"
#include "qcommonvalues_p.h"
#include "qebvextractor_p.h"
#include "qitem_p.h"
#include "qliteral_p.h"
#include "qoptimizationpasses_p.h"
#include "quntypedatomicconverter_p.h"
#include "qvaluecomparison_p.h"

#include "qgeneralcomparison_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

GeneralComparison::GeneralComparison(const Expression::Ptr &op1,
                                     const AtomicComparator::Operator op,
                                     const Expression::Ptr &op2,
                                     const bool isBackwardsCompat) : PairContainer(op1, op2)
                                                                   , m_operator(op)
                                                                   , m_isBackwardsCompat(isBackwardsCompat)
{
}

bool GeneralComparison::generalCompare(const Item &op1,
                                       const Item &op2,
                                       const DynamicContext::Ptr &context) const
{
    Q_ASSERT(op1);
    Q_ASSERT(op2);

    if(comparator())
        return compare(op1, op2, comparator(), m_operator);

    Expression::Ptr a1(new Literal(op1));
    Expression::Ptr a2(new Literal(op2));

    const AtomicComparator::Ptr comp(fetchGeneralComparator(a1, a2, context));
    /* The fetchGeneralComparator call may rewrite a1 and/or a2. */
    Q_ASSERT(a1);
    Q_ASSERT(a2);
    Q_ASSERT(comp);

    return compare(a1->evaluateSingleton(context),
                   a2->evaluateSingleton(context),
                   comp,
                   m_operator);
}

bool GeneralComparison::evaluateEBV(const DynamicContext::Ptr &context) const
{
    const Item::Iterator::Ptr it1(m_operand1->evaluateSequence(context));
    Item item1(it1->next());

    if(!item1)
        return false;