# be_u32 in nom::number::complete - Rust
Recognizes a big endian unsigned 4 bytes integer.
Keywords: rust, rustlang, rust-lang, be_u32

# Function nom::number::complete::be_u32

source · [−]

    pub fn be_u32<I, E: ParseError<I>>(input: I) -> IResult<I, u32, E> where
        I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength,

Expand description

Recognizes a big endian unsigned 4 bytes integer.

Complete version: Returns an error if there is not enough input data.

    use nom::number::complete::be_u32;

    let parser = |s| {
      be_u32(s)
    };

    assert_eq!(parser(&b"\x00\x03\x05\x07abcefg"[..]), Ok((&b"abcefg"[..], 0x00030507)));
    assert_eq!(parser(&b"\x01"[..]), Err(Err::Error((&[0x01][..], ErrorKind::Eof))));