[perl #63894] A returned () is a Nil but doesn't smartmatch against one

[Patrick R. Michaud via RT]

On Sun Mar 15 08:36:42 2009, masak wrote:
> <masak> rakudo: sub foo { return }; say foo.WHAT; say ?(foo ~~ Nil)
> <p6eval> rakudo 5b1ff9: OUTPUT«Nil␤0␤»
> * masak submits
> 
> Expected behavior: a "Nil" and a 1. Or an explanation about why a
> value shouldn't smartmatch successfully against its own type.

Note that "foo ~~ Nil" is the same as "foo(~~Nil)" which is the same as
"foo(~(~Nil))".  In other words, it's not a smartmatch operator here,
it's two prefix:<~>s.

Rejecting ticket.

Pm