Пример #1
0
// In future we may want to cache this transition.
Structure* Structure::freezeTransition(VM& vm, Structure* structure)
{
    Structure* transition = preventExtensionsTransition(vm, structure);

    if (transition->propertyTable()) {
        PropertyTable::iterator iter = transition->propertyTable()->begin();
        PropertyTable::iterator end = transition->propertyTable()->end();
        if (iter != end)
            transition->setHasReadOnlyOrGetterSetterPropertiesExcludingProto(true);
        for (; iter != end; ++iter)
            iter->attributes |= iter->attributes & Accessor ? DontDelete : (DontDelete | ReadOnly);
    }

    ASSERT(transition->hasReadOnlyOrGetterSetterPropertiesExcludingProto() || !transition->classInfo()->hasStaticSetterOrReadonlyProperties());
    ASSERT(transition->hasGetterSetterProperties() || !transition->classInfo()->hasStaticSetterOrReadonlyProperties());
    transition->checkOffsetConsistency();
    return transition;
}