TaxRate

A rate of tax, a percentage never below 0%: 20%.

Money and banking; ordered; since Jadpo 0.1.0.

Make one

It is a Percentage with bounds of its own: build one as you build a Percentage, and a value outside its bounds breaks min or max.

text.parse(raw, as: TaxRate) reads one from its text; text that isn't one at all fails malformed, such as 20, 0.2 or twenty percent.

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 one column named for the field, of type numeric. 5% is stored as 0.05.

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.