CardExpiry

The month a payment card runs to, to its end, written 2028-12 and shown as the card prints it, 12/28: year from 2000 to 2099, month from 1 to 12. Personal data.

Money and banking; ordered; since Jadpo 0.1.0.

Make one

Build one from its fields, CardExpiry { year: ... month: ... }.

text.parse(raw, as: CardExpiry) reads one from its text; text that isn't one at all fails malformed, such as 12/28, 2028-13 or 2028-00.

Fields

Text, JSON and storage

text.from writes its canonical text, the one form text.parse reads back. JSON sends its canonical text as a string.

It is stored in 2 columns, each named for the field, _ and its suffix. This is 2028-01:

Shown to people

text.format(value, locale:) shows it to people in their locale.

With locale: Locale.en_gb:

Operations

It has the contract's own operations: text.parse, text.from, text.format, json.read, json.write and ==. It is ordered, so < and sorting take it. Every standard type meets one contract says how they work.