Could we generate Borrow implementations to super classes?

[madsmtm]

Summary

Borrow acts similarly to AsRef, with a slight difference being that the former also requires PartialEq, Eq and Hash to work the same for the borrowed type.

This seems to be upheld by JS classes -> superclasses, and as such I'm wondering why this trait isn't implemented for those?

Is it just because most of them don't implement Hash? If that were to change, would it make sense to implement Borrow?

Additional Details

I'm taking inspiration from this crate for a few design decisions for objc2, and would like to know your thoughts on this.

[daxpedda]

This seems to be upheld by JS classes -> superclasses, and as such I'm wondering why this trait isn't implemented for those?

I unfortunately don't know the historical context here, but I don't really see a reason why Borrow shouldn't be implemented.

Is it just because most of them don't implement Hash? If that were to change, would it make sense to implement Borrow?

I believe this isn't relevant. Borrow doesn't require Hash, it just requires Hash implementations to have the same output, which is irrelevant in our case as long as we don't implement Hash.