sendable Weak Reference

[gftea]

Hi,

it seems there is no sendable Weak reference?

[hniksic]

There isn't (they weren't needed for the use case this crate was developed for), but I believe one could be added in a straightforward way.

[gftea]

When we have a cyclic data structure, which T has a field with weak reference to itself, then we need a SendWeak to make SendRc sendable

[hniksic]

That makes sense. Do you use SendRc in production, or plan to do so? Do you find it useful?

I could look into adding support for weak references, but would only do that if it will be of practical use.