One body shared by multiple signatures (Tentative proposal for 6.d)

gistfile1.txt

This is one of several gists I've written that relate to several distinct tentative proposals for 6.d that make sense both independently and together.

This gist discusses a long conjectured feature that would work nicely with the other proposals:

Others include:

* [Implicit/explicit mutation in 6.c]().

----

In 6.c one can write two methods thus:

    multi method m (... --> self) {
        ...
    }
    multi method m (... --> SELF) {
        ... # body is identical to body of the `--> self` method above.
    }
    
This proposal is to support:

    multi method m (... --> self),
    multi method m (... --> SELF) {
        ... # body is identical for both method signatures.
    }
    
or something similar.