Patrick (>), Carl (>>):
>> r30590:
>> $ ./perl6 -e 'regex a { b }; "b" ~~ a'
>> too few arguments passed (0) - 2 params expected
>> [...]
>>
>> I've also added tests for this in t/spec/S05-metasyntax/regex.t.
>>
>> (S05 is not entirely clear as to whether this should actually work.
>> IMHO, there's noreason for it not to. Storing anonymous regexes in
>> scalar variables already works.)
>>
>> $ ./perl6 -e 'my $a = regex { b }; say "b" ~~ $a'
>> b
>
> For now I'm going to claim that Rakudo has this one correct. The
> difference between the first and second examples above is that in
> the scalar variable example, the $a variable passed to infix:<~~>
> contains the regex sub itself, whereas in the first example the
> a regex is being invoked as a 0-argument listop prior to calling
> the smart match.
>
> In other words, the correct syntax is to use &a, as in:
>
> $ ./parrot perl6.pbc -e 'regex a { b }; say "b" ~~ &a;'
> b
>
> By way of analogy:
>
> sub foo($x) { $x eq 'b' }
>
> say "b" ~~ foo; # wrong, sub foo called as 0-arg listop
> say "b" ~~ &foo; # right, sub foo passed to infix:<~~>
That does make sense. Thank you.
// Carl
