Hello,

I would like to provide some helper functions that work on pointer types 
and having trouble getting it to work with ~ type constraints.

Here is the problem in code: https://go.dev/play/p/z0sKEsUaL_d

I have types Foo and Bar. Bar's underlying type is Foo. I want a function 
that takes in pointers to types whose underlying type is Foo, but I get a 
compile error when trying to call this function:

    *Bar does not implement ~*Foo (*Bar missing in ~*main.Foo)

Should this work?

My real use case is around a hash map library. It's implementation is a 
copy of Go's built-in map, but allows the user to control the equal and 
hash function, thus allowing keys of any type rather than just comparable 
types. github.com/aristanetworks/gomap

I would like to provide helper functions 
<https://github.com/aristanetworks/gomap/blob/main/funcs.go> for gomap.Map 
similar to those provided by golang.org/x/exp/maps and for those helpers to 
work on pointers to types whose underlying type is gomap.Map.

Thanks,
Aaron


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