Course of Raku / Regexes and grammars / Grammars / Action classes / Exercises
Humanise a date
Problem
Write a grammar that parses an ISO date such as
'2026-07-05' into three tokens: year,
month, and day. Write an action
class in which each token method makes a value:
year and day make their number as an integer,
while month makes the English month name
(1 → January, …, 12 →
December). The TOP method then reads those
three values with .made and makes a human-readable string
like '5 July 2026'. Parse '2026-07-05' with
the action class and print .made.
Example
The program prints:
5 July 2026Solution
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