Function be_u32

pub fn be_u32<I, E: ParseError<I>>() -> impl Parser<I, Output = u32, Error = E>
where
    I: Input<Item = u8>,

Recognizes a big endian unsigned 4 bytes integer.

use nom::number::be_u32;

let parser = |s| {
  be_u32::<_, (_, ErrorKind)>().parse(s)
};

assert_eq!(parser(&b"\x00\x01\x02\x03abcd"[..]), Ok((&b"abcd"[..], 0x00010203)));
assert_eq!(parser(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(3))));