pub fn float<T, E: ParseError<T>>(input: T) -> IResult<T, f32, E> where
T: Slice<RangeFrom<usize>> + Slice<RangeTo<usize>>,
T: Clone + Offset,
T: InputIter + InputLength + InputTake + ParseTo<f32> + Compare<&'static str>,
<T as InputIter>::Item: AsChar,
<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 f32.
Streaming version: Will return Err(nom::Err::Incomplete(_))
if there is not enough data.
use nom::number::complete::float;
let parser = |s| {
float(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))));