Function nom::number::streaming::be_u24

pub fn be_u24<'a, E: ParseError<&'a [u8]>>(
    i: &'a [u8]
) -> IResult<&'a [u8], u32, E>

Recognizes a big endian unsigned 3 byte integer

streaming version: will return Err(nom::Err::Incomplete(_)) if there is not enough data

use nom::number::streaming::be_u24;

let parser = |s| {
  be_u24::<(_, ErrorKind)>(s)
};

assert_eq!(parser(b"\x00\x01\x02abcd"), Ok((&b"abcd"[..], 0x000102)));
assert_eq!(parser(b"\x01"), Err(Err::Incomplete(Needed::Size(3))));