# Function nom::number::streaming::recognize_float

source · [−]

    pub fn recognize_float<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> where
        T: Slice<RangeFrom<usize>> + Slice<RangeTo<usize>>,
        T: Clone + Offset,
        T: InputIter,
        <T as InputIter>::Item: AsChar,
        T: InputTakeAtPosition + InputLength,
        <T as InputTakeAtPosition>::Item: AsChar,

Expand description

Recognizes a floating point number in text format and returns the corresponding part of the input.

Streaming version: Will return `Err(nom::Err::Incomplete(_))` if it reaches the end of input.

    use nom::number::streaming::recognize_float;

    let parser = |s| {
      recognize_float(s)
    };

    assert_eq!(parser("11e-1;"), Ok((";", "11e-1")));
    assert_eq!(parser("123E-02;"), Ok((";", "123E-02")));
    assert_eq!(parser("123K-01"), Ok(("K-01", "123")));
    assert_eq!(parser("abc"), Err(Err::Error(("abc", ErrorKind::Char))));