Cidr

An address range (RFC 4632 and RFC 4291): its first address as IpAddress writes it, / and the prefix's length, every bit after the prefix zero: 192.0.2.0/24, 2001:db8::/32.

Web and network; not ordered; since Jadpo 0.1.0.

Make one

Build one from its text, Cidr("192.0.2.0/24"), which checks it: text that isn't one breaks format.

text.parse(raw, as: Cidr) reads one from its text; text that isn't one at all fails malformed, such as 192.0.2.1/24, 192.0.2.0/33 or 192.0.2.0.

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 text. 0.0.0.0/0 is stored as '0.0.0.0/0'.

Shown to people

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

With locale: Locale.en_gb:

Operations

• web.cidr_contains(range: Cidr, address: IpAddress) -> Bool: Whether address is inside range. An IPv4 address is never inside an IPv6 range, nor the other way round.

Like every standard type, it also has the contract's own operations: text.parse, text.from, text.format, json.read, json.write and ==. It isn't ordered, so < and sorting don't take it. Every standard type meets one contract says how they work.