There were two different problems here:
1) It was not possible to flatten an array within \(...).
This has been fixed:
$ perl6 -e 'my @t = 1, 2; say \(|@t)'
\(1, 2)
[BTW: It was possible to do 'Capture(|@t)' before, only with the unary
backslash operator it didn't work.]
The smartmatch from the OP also works with |@t (but it fails as expected
without flattening the array).
$ perl6 -e 'class A { method foo (Int) {} }; my @t = 1; say \(A, |@t) ~~
A.^find_method("foo").signature;'
True
$ perl6 -e 'class A { method foo (Int) {} }; my @t = 1; say \(A, @t) ~~
A.^find_method("foo").signature;'
False
I added a test to S02-types/capture.t with commit
https://github.com/perl6/roast/commit/7c4672ced8
2) Capture.perl flattens elements.
This is still an issue, but there is a separate ticket:
https://rt.perl.org/Ticket/Display.html?id=114100. I'll link to that ticket,
but since the main issue 1) is solved, I'm going to close this ticket as
'resolved'.
