# be_f64 in nom::number::streaming - Rust
Recognizes a big endian 8 bytes floating point number.
Keywords: rust, rustlang, rust-lang, be_f64

# Function nom::number::streaming::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.

Streaming version: Will return `Err(nom::Err::Incomplete(_))` if there is not enough data.

    use nom::number::streaming::be_f64;

    let parser = |s| {
      be_f64::<_, (_, ErrorKind)>(s)
    };

    assert_eq!(parser(&[0x40, 0x29, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), Ok((&b""[..], 12.5)));
    assert_eq!(parser(&[0x01][..]), Err(Err::Incomplete(Needed::new(7))));