Stable Rust now that GATs are stable?

[rtfeldman]

Thanks for making this library!

I noticed in the readme that GATs are a reason for depending on nightly Rust instead of stable. Now that GATs have just landed in stable, is it possible for monoio to depend on stable?

[ihciah]

Except for GAT, we rely on type_alias_impl_trait feature, and it's hard to get rid of it...

[jklop123]

With async_fn_in_trait, return_position_impl_trait_in_trait has merged into the stable version (1.75), perhaps a non-GAT implementation based on the stable version will become possible.

[ihciah]

With async_fn_in_trait, return_position_impl_trait_in_trait has merged into the stable version (1.75), perhaps a non-GAT implementation based on the stable version will become possible.

Yes it is. It would become simpler to write trait and impl, but it may causes break changes. Also I don't know if there would be overhead when replace code like this:

type RetFut = impl Future<..>;
fn demo(&self, num: i32) -> Self::RetFut {...}
fn demo2(&self, num: i32) -> Self::RetFut {
    let num = nun + 1;
    self.demo(num)
}

to

async fn demo(&self, num: i32) -> xxx {...}
async fn demo2(&self, num: i32) -> xxx {
    let num = nun + 1;
    self.demo(num).await
}

If no overhead, I think it will be better to use the new style.