Course of Raku / Regexes and grammars / Grammars / What is a grammar / Named regexes
Quiz — Named regexes
What does the following program print?
my regex letter { <[a..z]> }
'a1' ~~ / <letter> /;
say $<letter>;| 1 | ｢a｣ |
| 0 | ｢1｣ |
| 0 | ｢a1｣ |
| 0 | ｢letter｣ |
Calling a named regex as <letter> both matches it
and captures the result under that name. The pattern finds the first
lowercase letter, a, so $<letter> is
｢a｣.