void FunctionClassData::mark(const QScriptValueImpl &object, int generation)
{
    if (object.classInfo() != classInfo())
        return;
    QScriptFunction *fun = object.toFunction();
    QScriptEnginePrivate *eng = QScriptEnginePrivate::get(object.engine());
    fun->mark(eng, generation);
}
void Math::addFunction(QScriptValueImpl &object, const QString &name,
                       QScriptInternalFunctionSignature fun, int length,
                       const QScriptValue::PropertyFlags flags)
{
    QScriptEnginePrivate *eng_p = QScriptEnginePrivate::get(object.engine());
    QScriptValueImpl val = eng_p->createFunction(fun, length, object.classInfo(), name);
    object.setProperty(name, val, flags);
}
void EnumerationClassData::mark(const QScriptValueImpl &object, int generation)
{
    Q_ASSERT(object.isValid());

    QScriptEnginePrivate *eng = object.engine();

    if (Enumeration::Instance *instance = Enumeration::Instance::get(object, classInfo())) {
        eng->markObject(instance->object, generation);
        if (instance->it)
            eng->markObject(instance->it->object(), generation);
    }
}
bool FunctionClassData::get(const QScriptValueImpl &object, const Member &member,
                            QScriptValueImpl *result)
{
    if (object.classInfo() != classInfo())
        return false;

    QScriptEnginePrivate *eng = QScriptEnginePrivate::get(object.engine());
    if (! member.isNativeProperty())
        return false;

    if (member.nameId() == eng->idTable()->id_length) {
        eng->newNumber(result, object.toFunction()->length);
        return true;
    } else if (member.nameId() == eng->idTable()->id_arguments) {
        eng->newNull(result);
        return true;
    }

    return false;
}
bool FunctionClassData::resolve(const QScriptValueImpl &object,
                                QScriptNameIdImpl *nameId,
                                QScript::Member *member, QScriptValueImpl *base)
{
    if (object.classInfo() != classInfo())
        return false;

    QScriptEnginePrivate *eng = QScriptEnginePrivate::get(object.engine());

    if ((nameId == eng->idTable()->id_length)
        || (nameId == eng->idTable()->id_arguments)) {
        member->native(nameId, /*id=*/ 0,
                       QScriptValue::Undeletable
                       | QScriptValue::ReadOnly
                       | QScriptValue::SkipInEnumeration);
        *base = object;
        return true;
    }

    return false;
}