Macro nom::u16

macro_rules! u16 {
    ($i : expr, $e : expr) => { ... };
}

if the parameter is nom::Endianness::Big, parse a big endian u16 integer, otherwise a little endian u16 integer

use nom::number::Endianness;

named!(be<u16>, u16!(Endianness::Big));

assert_eq!(be(b"\x00\x01abcd"), Ok((&b"abcd"[..], 0x0001)));
assert_eq!(be(b"\x01"), Err(Err::Incomplete(Needed::Size(2))));

named!(le<u16>, u16!(Endianness::Little));

assert_eq!(le(b"\x00\x01abcd"), Ok((&b"abcd"[..], 0x0100)));
assert_eq!(le(b"\x01"), Err(Err::Incomplete(Needed::Size(2))));