# Function nom::number::streaming::f32

source · [−]

    pub fn f32<I, E: ParseError<I>>(
        endian: Endianness
    ) -> fn(_: I) -> IResult<I, f32, E> where
        I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength,

Expand description

Recognizes a 4 byte floating point number

If the parameter is `nom::number::Endianness::Big`, parse a big endian f32 float, otherwise if `nom::number::Endianness::Little` parse a little endian f32 float. Streaming version: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data.

    use nom::number::streaming::f32;

    let be_f32 = |s| {
      f32::<_, (_, ErrorKind)>(nom::number::Endianness::Big)(s)
    };

    assert_eq!(be_f32(&[0x41, 0x48, 0x00, 0x00][..]), Ok((&b""[..], 12.5)));
    assert_eq!(be_f32(&b"abc"[..]), Err(Err::Incomplete(Needed::new(1))));

    let le_f32 = |s| {
      f32::<_, (_, ErrorKind)>(nom::number::Endianness::Little)(s)
    };

    assert_eq!(le_f32(&[0x00, 0x00, 0x48, 0x41][..]), Ok((&b""[..], 12.5)));
    assert_eq!(le_f32(&b"abc"[..]), Err(Err::Incomplete(Needed::new(1))));