# Function nom::number::streaming::be_u64

source · [−]

    pub fn be_u64<I, E: ParseError<I>>(input: I) -> IResult<I, u64, E> where
        I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength,

Expand description

Recognizes a big endian unsigned 8 bytes integer.

Streaming version: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data.

    use nom::number::streaming::be_u64;

    let parser = |s| {
      be_u64::<_, (_, ErrorKind)>(s)
    };

    assert_eq!(parser(&b"\x00\x01\x02\x03\x04\x05\x06\x07abcd"[..]), Ok((&b"abcd"[..], 0x0001020304050607)));
    assert_eq!(parser(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(7))));