# New Ticket Created by Filip Stedronsky
# Please include the string: [perl #130400]
# in the subject line of all future correspondence about this issue.
# <URL: https://rt.perl.org/Ticket/Display.html?id=130400 >
The <.rule> non-capturing subrule match does not work outside grammars
even though one would expect it to. Compare:
> my regex a { a };
regex a { a }
> "aaa" ~~ /<a>/
｢a｣
a => ｢a｣
> "aaa" ~~ /<.a>/
No such method 'a' for invocant of type 'Cursor'
in block <unit> at <unknown file> line 1
In a grammar, this works as expected:
> grammar G { regex a { a }; regex TOP { <.a> }; }
(G)
> G.parse("a")
｢a｣
> "a" ~~ /<G::TOP>/
｢a｣
G::TOP => ｢a｣
The difference is really the grammar, not the fact that the referring
regex is also named. Because this does not work:
> my regex a { a };
regex a { a }
> my regex as { <.a> };
regex as { <.a> }
> "a" ~~ /<as>/
No such method 'a' for invocant of type 'Cursor'
in regex as at <unknown file> line 1
in block <unit> at <unknown file> line 1
Also, surprisingly enough, no problems arise with non-capturing calls
to built-in rules:
> " " ~~ /<.ws>/
｢ ｣
I might try to fix this if someone confirms this is indeed a bug.
Tested with current released Rakudo version:
This is Rakudo version 2016.11 built on MoarVM version 2016.11
implementing Perl 6.c.
