HaloO,
Larry Wall wrote:
You've got it inside out. Unordered is just "does A | B | C" or
some such, the | there really being coerced to a set construction,
not a junction. In fact, & would work just as well. I only used |
because it's more readable. Autocoercion of junctions to sets is,
of course, conjectural. You really have
does set(A,B,C)
I would like "does A & B & C" mean the intersection type of A, B and C.
That is a supertype of all three roles. In addition we might need
negation to get what Jonathan Lang envisoned for the Complex type that
does Num & !Comparable. IOW, I'm opting for a role combination syntax
by means of logical operators that operate on the intension set of the
involved roles. Could we get that?
BTW, the synopsis reserve Foo[Bar] and Foo{Bar} for type theoretical
operations. The former is used for parametric types. How is the latter
used?
Regards, TSa.
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