Course of Raku / Addendum 🆕 / Types and text machines / Regexes and grammars / Exercises / Parse a date with named captures

Solution: Parse a date with named captures

Here is a possible solution to the task.

Code

my $date = '2026-07-03';

if $date ~~ / $<year>=(\d ** 4) '-' $<month>=(\d\d) '-' $<day>=(\d\d) / {
    say "year: $<year>, month: $<month>, day: $<day>";
}

🦋 You can find the source code in the file parse-date.raku.

Output

year: 2026, month: 07, day: 03

Comments

1. $<year>=( ... ) gives a capture a name. After a successful match, $<year>, $<month>, and $<day> hold the captured pieces.

2. \d ** 4 means exactly four digits, so the pattern only matches a properly shaped date.

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