# Function nom::number::complete::be_f64

source · [−]

    pub fn be_f64<I, E: ParseError<I>>(input: I) -> IResult<I, f64, E> where
        I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength,

Expand description

Recognizes a big endian 8 bytes floating point number.

Complete version: Returns an error if there is not enough input data.

    use nom::number::complete::be_f64;

    let parser = |s| {
      be_f64(s)
    };

    assert_eq!(parser(&[0x40, 0x29, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), Ok((&b""[..], 12.5)));
    assert_eq!(parser(&b"abc"[..]), Err(Err::Error((&b"abc"[..], ErrorKind::Eof))));