pub fn f64<I, E: ParseError<I>>(
endian: Endianness
) -> fn(_: I) -> IResult<I, f64, E> where
I: Slice<RangeFrom<usize>> + InputIter<Item = u8> + InputLength,
Expand description
Recognizes an 8 byte floating point number
If the parameter is nom::number::Endianness::Big
, parse a big endian f64 float,
otherwise if nom::number::Endianness::Little
parse a little endian f64 float.
Streaming version: Will return Err(nom::Err::Incomplete(_))
if there is not enough data.
use nom::number::streaming::f64;
let be_f64 = |s| {
f64::<_, (_, ErrorKind)>(nom::number::Endianness::Big)(s)
};
assert_eq!(be_f64(&[0x40, 0x29, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00][..]), Ok((&b""[..], 12.5)));
assert_eq!(be_f64(&b"abc"[..]), Err(Err::Incomplete(Needed::new(5))));
let le_f64 = |s| {
f64::<_, (_, ErrorKind)>(nom::number::Endianness::Little)(s)
};
assert_eq!(le_f64(&[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x29, 0x40][..]), Ok((&b""[..], 12.5)));
assert_eq!(le_f64(&b"abc"[..]), Err(Err::Incomplete(Needed::new(5))));