Function smtp_codec::parse::address::IPv6_comp

pub fn IPv6_comp(input: &[u8]) -> IResult<&[u8], &[u8]>

The "::" represents at least 2 16-bit groups of zeros. No more than 6 groups in addition to the "::" may be present.

IPv6-comp = [IPv6-hex *5(":" IPv6-hex)] "::" [IPv6-hex *5(":" IPv6-hex)]