1 use std::convert::TryFrom; 2 3 use crate::packets::{hci, lmp}; 4 5 pub enum Either<L, R> { 6 Left(L), 7 Right(R), 8 } 9 10 macro_rules! impl_try_from { 11 ($T: path) => { 12 impl<L, R> TryFrom<$T> for Either<L, R> 13 where 14 L: TryFrom<$T>, 15 R: TryFrom<$T>, 16 { 17 type Error = (); 18 19 fn try_from(value: $T) -> Result<Self, Self::Error> { 20 let left = L::try_from(value.clone()); 21 if let Ok(left) = left { 22 return Ok(Either::Left(left)); 23 } 24 let right = R::try_from(value); 25 if let Ok(right) = right { 26 return Ok(Either::Right(right)); 27 } 28 Err(()) 29 } 30 } 31 }; 32 } 33 34 impl_try_from!(lmp::PacketPacket); 35 impl_try_from!(hci::CommandPacket); 36