use core::fmt;

use never::Never;

use super::coding::Coding;
use crate::helpers::enc_vec;

pub trait Request: fmt::Debug + Sized + 'static {
	type Response: fmt::Debug + Coding + 'static;
}

pub fn respond<R: Request>(_: &R, rep: R::Response) -> Vec<u8> { enc_vec(&rep) }

pub trait Channel: 'static {
	type Req: Coding + Sized + 'static;
	type Notif: Coding + Sized + 'static;
}
impl Channel for Never {
	type Notif = Never;
	type Req = Never;
}

pub trait MsgSet: Sync + 'static {
	type In: Channel;
	type Out: Channel;
}
impl MsgSet for Never {
	type In = Never;
	type Out = Never;
}