Function be_uint

fn be_uint<Input, Uint, Error>(
    input: &mut Input,
    bound: usize,
) -> PResult<Uint, Error>
where
    Input: StreamIsPartial + Stream<Token = u8>,
    Uint: Default + Shl<u8, Output = Uint> + Add<Uint, Output = Uint> + From<u8>,
    Error: ParserError<Input>,