"protected" prevents creation by Converter::null_owned()

[ssenffses]

Hello - I'm trying to initialize a yet-unassigned Subscriber member variable in a class constructor, for which the only way I've found so far is to add

_mysubscriber(interop::detail::null<zenoh::Subscriber<void>>())

to the class initializer list. But this fails during compilation because Converter::null_owned() cannot access the protected constructors of SubscriberBase.

It seems to work fine like this with Publisher, though of course it doesn't look like the ideal way.

[DenisBiryukov91]

Hello, subscriber does not have an empty constructor by design (since non-initialized subscriber does not make much sense), you can either store it in a pointer or in std::optional if you absolutely can not initialize it in the class initializer list.

[ssenffses]

Ok thx, I will find a way.