(Debug) Description of case paths, e.g. to form expectation error messages?

[DivineDominion]

Given

@CasePathable
enum Foo {
    case bar(Int)
    case baz(Int)  // Same associated value type as `bar`!
}

I'd love to get a string from \Foo.Cases.bar for Error messages for failed expectations that don't render as:

\Case<Foo>.subscript(dynamicMember: <unknown>)

But say something like

Case<Foo>.bar

However, I couldn't see how EnumReflection could be used from client code (mine) to get to a tag and then caseName.

A ...<Foo,Int> (aka getting to the type of the associated value, if any) is not enough, so I wonder what options there might be.

[stephencelis]

@DivineDominion Key path descriptions are generated by Swift itself, and we unfortunately don't really have the ability to override it here. That said, one could potentially modify the @CasePathable macro to generate this information and make it available on a new API. This API surface are would need to be thoughtfully designed and pitched, but if you're willing to do so we can chat about potential implementation, let us know!