C++ Ptr::compatModeEnabled方法代码示例

Expression::Ptr ArithmeticExpression::typeCheck(const StaticContext::Ptr &context,
        const SequenceType::Ptr &reqType)
{
    m_isCompat = context->compatModeEnabled();

    const Expression::Ptr me(PairContainer::typeCheck(context, reqType));
    const ItemType::Ptr t1(m_operand1->staticType()->itemType());
    const ItemType::Ptr t2(m_operand2->staticType()->itemType());

    if(*CommonSequenceTypes::Empty == *t1 ||
            *CommonSequenceTypes::Empty == *t2)
    {
        return EmptySequence::create(this, context);
    }

    if(*BuiltinTypes::xsAnyAtomicType == *t1    ||
            *BuiltinTypes::xsAnyAtomicType == *t2    ||
            *BuiltinTypes::numeric == *t1            ||
            *BuiltinTypes::numeric == *t2)
    {
        /* The static type of (at least) one of the operands could not
         * be narrowed further than xs:anyAtomicType, so we do the operator
         * lookup at runtime. */
        return me;
    }

    m_mather = fetchMathematician(m_operand1, m_operand2, m_op, true, context, this,
                                  ReportContext::XPTY0004, m_isCompat);

    return me;
}

Expression::Ptr CardinalityVerifier::verifyCardinality(const Expression::Ptr &operand,
                                                       const Cardinality &requiredCard,
                                                       const StaticContext::Ptr &context,
                                                       const ReportContext::ErrorCode code)
{
    const Cardinality opCard(operand->staticType()->cardinality());

    if(requiredCard.isMatch(opCard))
        return operand;
    else if(requiredCard.canMatch(opCard))
        return Expression::Ptr(new CardinalityVerifier(operand, requiredCard, code));
    else if(context->compatModeEnabled() &&
            !opCard.isEmpty())
    {
        return GenericPredicate::createFirstItem(operand);
    }
    else
    {
        /* Sequences within this cardinality can never match. */
        context->error(wrongCardinality(requiredCard, opCard), code, operand.data());
        return operand;
    }
}

Expression::Ptr TypeChecker::verifyType(const Expression::Ptr &operand,
                                        const SequenceType::Ptr &reqSeqType,
                                        const StaticContext::Ptr &context,
                                        const ReportContext::ErrorCode code,
                                        const Options options)
{
    const ItemType::Ptr reqType(reqSeqType->itemType());
    const Expression::Properties props(operand->properties());

    /* If operand requires a focus, do the necessary type checking for that. */
    if(props.testFlag(Expression::RequiresFocus) && options.testFlag(CheckFocus))
    {
        const ItemType::Ptr contextType(context->contextItemType());
        if(contextType)
        {
            if(props.testFlag(Expression::RequiresContextItem))
            {
                Q_ASSERT_X(operand->expectedContextItemType(), Q_FUNC_INFO,
                           "When the Expression sets the RequiresContextItem property, it must "
                           "return a type in expectedContextItemType()");
                const ItemType::Ptr expectedContextType(operand->expectedContextItemType());

                /* Allow the empty sequence. We don't want to trigger XPTY0020 on ()/... . */
                if(!expectedContextType->xdtTypeMatches(contextType) && contextType != CommonSequenceTypes::Empty)
                {
                    context->error(wrongType(context->namePool(), operand->expectedContextItemType(), contextType),
                                   ReportContext::XPTY0020, operand.data());
                    return operand;
                }
            }
        }
        else
        {
            context->error(QtXmlPatterns::tr("The focus is undefined."), ReportContext::XPDY0002, operand.data());
            return operand;
        }
    }

    SequenceType::Ptr operandSeqType(operand->staticType());
    ItemType::Ptr operandType(operandSeqType->itemType());

    /* This returns the operand if the types are identical or if operandType
     * is a subtype of reqType. */
    if(reqType->xdtTypeMatches(operandType) || *operandType == *CommonSequenceTypes::Empty)
        return operand;

    /* Since we haven't exited yet, it means that the operandType is a super type
     * of reqType, and that there hence is a path down to it through the
     * type hierachy -- but that doesn't necessarily mean that a up-cast(down the
     * hierarchy) would succeed. */

    Expression::Ptr result(operand);

    if(reqType->isAtomicType())
    {
        const Expression::ID opID = operand->id();
        if((opID == Expression::IDArgumentReference ||
                (opID == Expression::IDCardinalityVerifier && operand->operands().first()->is(Expression::IDArgumentReference)))
                && *BuiltinTypes::item == *operandType)
            return Expression::Ptr(new ArgumentConverter(result, reqType));

        if(!operandType->isAtomicType())
        {
            result = Expression::Ptr(new Atomizer(result));
            /* The atomizer might know more about the type. */
            operandType = result->staticType()->itemType();
        }

        if(reqType->xdtTypeMatches(operandType))
        {
            /* Atomization was sufficient. Either the expected type is xs:anyAtomicType
             * or the type the Atomizer knows it returns, matches the required type. */
            return result;
        }

        const bool compatModeEnabled = context->compatModeEnabled();

        if((options.testFlag(AutomaticallyConvert) && BuiltinTypes::xsUntypedAtomic->xdtTypeMatches(operandType)) ||
                (compatModeEnabled && BuiltinTypes::xsString->xdtTypeMatches(reqType)))
        {
            if(*reqType == *BuiltinTypes::numeric)
            {
                result = typeCheck(new UntypedAtomicConverter(result, BuiltinTypes::xsDouble, code),
                                   context, reqSeqType);
            }
            else
                result = typeCheck(new UntypedAtomicConverter(result, reqType, code), context, reqSeqType);

            /* The UntypedAtomicConverter might know more about the type, so reload. */
            operandType = result->staticType()->itemType();
        }
        else if(compatModeEnabled && *reqType == *BuiltinTypes::xsDouble)
        {
            const FunctionFactory::Ptr functions(context->functionSignatures());
            Expression::List numberArgs;
            numberArgs.append(operand);

            result = functions->createFunctionCall(QXmlName(StandardNamespaces::fn, StandardLocalNames::number),
                                                   numberArgs,
                                                   context,
//.........这里部分代码省略.........