Re: A common and useful thing that doesn't appear to be easy in Perl 6

[Martin D Kealey]

On Wed, 7 Apr 2010, yary wrote:
> 2010/4/6 Larry Wall <la...@wall.org>:
> >    Set(Read | Write)   # bogus, R|W is really 3 sets, R, W, and RW!
> >    Set(Read & Write)   # okay, can only represent RW
>
> Set(A | B) doesn't seem so bogus to me, if what you want is the power
> set

Hmm, surely a power-set would be written as

        Set(Set(X,Y,...))

or perhaps more mathematically as

        2 ** Set(X,Y,...)

-Martin