pub fn i32<T, E>(input: T) -> Result<(T, i32), Err<E>>where E: ParseError<T>, T: InputIter + Slice<RangeFrom<usize>> + InputLength + InputTake + Clone + for<'a> Compare<&'a [u8]>, <T as InputIter>::Item: AsChar,
mtls
will parse a number in text form to a number
Complete version: can parse until the end of input.