Cannot register type for structures with Boxed values in bevy_reflect

[Escapingbug]

When dering Reflect for type like:

#[derive(Reflect)]
struct MyTest(Box<String>);

The deriving part seems to be Ok, but when later register the type by:

let mut reg = TypeRegistry::default();
reg.register::<MyTest>();

It reported:

the trait `FromReflect` is not implemented for `Box<std::string::String>`

Is this expected result? Is there any workaround to bypass this limitation?

[MrGVSV]

This is because Box<T> does not implement any reflection trait, including FromReflect. There are some related issues and PRs:

• Implement Reflect for Box<dyn Reflect> #3392
• Implement Reflect for Box<dyn Reflect> #3400
• implement Reflect for Box<T> where T: Reflect #6098

I'm a bit surprised you were able to derive it. Did you not get a compile error from that?

[Escapingbug]

Plain derive does not give any error.
The error only comes when I'm trying to register that type.

So if I'm right about this, by implementing #6098, I will be able to deal with this issue?
I'm currently on a project which must have this feature. If it was so, I think I may help finish that.

[MrGVSV]

Plain derive does not give any error.
The error only comes when I'm trying to register that type.

I just tested the same code and the derive does fail for me. What version are you on?

So if I'm right about this, by implementing #6098, I will be able to deal with this issue?
I'm currently on a project which must have this feature. If it was so, I think I may help finish that.

Yeah I think so. If you want to adopt the PR, just be sure to reach out to the author on it and see if they'd be okay with that. I would also link back to this discussion and share your use case as well.

[Escapingbug]

Should be 0.11.2 bevy reflect.