Function nom::number::complete::double

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]>, 

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))));