No way to implement GetRuntimeClassName

[Alovchin91]

Motivation

ActivationFactory documentation states that GetRuntimeClassName should return “ the runtime class name of the object that the current ActivationFactory instantiates.”

Currently, this is not possible to do using windows-rs crate.

Drawbacks

None

Rationale and alternatives

This makes authoring WinRT components incomplete and potentially error-prone.

Additional context

No response

[kennykerr]

Yes, this is on my radar for the revamped implement macro.

[kennykerr]

The trait-based implement macro (#1345) will now implement GetRuntimeClassName automatically (here's an example).

Note that this is currently limited to interfaces. Classes (and exclusive interfaces) are on the way (#1094).

[Alovchin91]

Thanks! 🙂 I guess it's still impossible to implement it for IActivationFactory, right? Would it be useful to have an ability to override a default implementation?

[kennykerr]

For most scenarios that shouldn't matter, but yes I plan to support activation factories directly, so you won't have to think about implementing that. I also considered providing an option to override the default implementation using a trait if needed, but I'm not there yet.