internal override bool TrySetValue(CodeContext context, object instance, PythonType owner, object value) {
IWeakReferenceable reference;
if (context.GetPythonContext().TryConvertToWeakReferenceable(instance, out reference)) {
return reference.SetWeakRef(new WeakRefTracker(value, instance));
}
return false;
}
internal override bool TryGetValue(CodeContext context, object instance, PythonType owner, out object value) {
if (instance == null) {
value = this;
return true;
}
IWeakReferenceable reference;
if (context.GetPythonContext().TryConvertToWeakReferenceable(instance, out reference)) {
WeakRefTracker tracker = reference.GetWeakRef();
if (tracker == null || tracker.HandlerCount == 0) {
value = null;
} else {
value = tracker.GetHandlerCallback(0);
}
return true;
}
value = null;
return false;
}
