Function f64

fn f64<I, E: ParseError<I>>(endian: crate::number::Endianness) -> fn(_: I) -> IResult<I, f64, E>
where
    I: Input<Item = u8>

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. complete version: returns an error if there is not enough input data

# use nom::{Err, error::ErrorKind, Needed};
# use nom::Needed::Size;
use nom::number::complete::f64;

let be_f64 = |s| {
  f64(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::Error((&b"abc"[..], ErrorKind::Eof))));

let le_f64 = |s| {
  f64(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::Error((&b"abc"[..], ErrorKind::Eof))));