# New Ticket Created by Aleks-Daniel Jakimenko-Aleksejev
# Please include the string: [perl #130217]
# in the subject line of all future correspondence about this issue.
# <URL: https://rt.perl.org/Ticket/Display.html?id=130217 >
Code:
say ‘25_8thelloworld_234aeou’ ~~ / <+ident +[∞]> /
Result:
｢_8thelloworld_234aeou｣
Code:
say ‘25∞_8thelloworld_234aeou’ ~~ / <+ident +[∞]> /
Result:
∞
Obviously, <ident> is not a character class, but you can still use like if it
was.
More generally, you can use *any* rule exactly the same way, as long as it is
in the grammar:
Code:
grammar Blah {
rule TOP { <+foo -bar> };
rule foo { .+ };
rule bar { <[def]>+ }
};
say Blah.parse(‘abcdefgh’)'
Result
｢abcdefgh｣
Obviously, the code above does not make any sense, which is why I think Perl 6
should be smart enough to give a warning in this case.
Could be something like “attempt to use a complex rule as a character class” or
something along the lines.
Related doc ticket: https://github.com/perl6/doc/issues/973
Related IRC discussion: https://irclog.perlgeek.de/perl6/2016-11-29#i_13650256
