Please add support for smol async runtime

[VerdeQuar]

would be awesome to have methods in egui_inbox and egui_suspense that work with smol runtime, also does this:

hello_egui/crates/hello_egui_utils/src/lib.rs

Line 46 in b541697

compile_error!("You need to enable the `tokio` feature to use this crate on native. If you need a different async runtime, please open an issue (should be easy to add).");

need to be a compile error? it requires me to have that feature, despite me currently not using any method that actually requires tokio (im using the blocking variants)

[lucasmerlin]

You should only get that error if the async feature gets enabled in some way, so if you remove the async feature it should compile without the error.

And yeah it needs to be an error (I guess I could panic in the spawn function, but I prefer a compile error).

[VerdeQuar]

right, to be exact, it triggers when i disable tokio feature in egui_inbox
in which i'm only using TypeInbox, when i enable the feature, everything compiles and works, despite me not having any tokio runtime

[VerdeQuar]

ok nvm, egui_suspense still needs a tokio runtime for some reason
the feature just looks if it is at all turned on and not which crate actually needs it, so it gave me that error when i disabled it from both egui_suspense and egui_inbox which confused me and was looking if egui_inbox works and didn't test egui_suspense

[VerdeQuar]

ok so turns out another library still forces me to use tokio, egui_suspense is working fine, sorry for a false alarm
still would be cool to have smol supported here so i can use it in another project

[lucasmerlin]

It'd be great if you could open a PR, it should be easy to add!
I think we just need a new spawn definition here:

hello_egui/crates/hello_egui_utils/src/lib.rs

Lines 32 to 37 in d040a69

	/// Spawns a tokio task
	#[cfg(all(feature = "tokio", not(target_arch = "wasm32")))]
	pub fn spawn(future: impl std::future::Future<Output = ()> + Send + 'static) {
	tokio::task::spawn(future);
	}

And of course the feature definitions in the relevant crates.

Just not sure what to do if both tokio and smol are enabled 🤔 compile_error or should we default to tokio?

[VerdeQuar]

sure, i'll look into it when i have some time, and i think a compile error would be fine