Function cron_clock::double

pub fn double<T>(input: T) -> Result<(T, f64), Err<T, u32>> where
    T: Slice<Range<usize>> + Slice<RangeFrom<usize>> + Slice<RangeTo<usize>> + Clone + Offset + InputIter + InputLength + ParseTo<f64> + AtEof + InputTakeAtPosition,
    <T as InputIter>::Item: AsChar,
    <T as InputTakeAtPosition>::Item: AsChar, 

Recognizes floating point number in a byte string and returns a f64