Luke Palmer wrote:
> http://repetae.net/john/recent/out/supertyping.html
> This was a passing proposal to allow supertype declarations in
> Haskell.  I'm referencing it here because it's something that I've had
> in the back of my mind for a while for Perl 6.  I'm glad somebody else
> has thought of it.
>     role Complex
>         does Object
>         contains Num
>     {...}

I've probably misunderstood you, but...:

    role Complex does Object {...}
    Num does Complex;
    # That should work and DWYM, right?


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