pub fn double<T, E: ParseError<T>>(input: T) -> IResult<T, f64, E> where
T: Slice<RangeFrom<usize>> + Slice<RangeTo<usize>> + Slice<Range<usize>>,
T: Clone + Offset + ParseTo<f64> + Compare<&'static str>,
T: InputIter + InputLength + InputTake,
<T as InputIter>::Item: AsChar + Copy,
<T as InputIter>::IterElem: Clone,
T: InputTakeAtPosition,
<T as InputTakeAtPosition>::Item: AsChar,
T: AsBytes,
T: for<'a> Compare<&'a [u8]>, Expand description
Recognizes floating point number in text format and returns a f64.
Complete version: Can parse until the end of input.
use nom::number::complete::double;
let parser = |s| {
double(s)
};
assert_eq!(parser("11e-1"), Ok(("", 1.1)));
assert_eq!(parser("123E-02"), Ok(("", 1.23)));
assert_eq!(parser("123K-01"), Ok(("K-01", 123.0)));
assert_eq!(parser("abc"), Err(Err::Error(("abc", ErrorKind::Float))));