rust/tests/ui/coroutine/clone-rpit.rs

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// revisions: current next
//[next] compile-flags: -Ztrait-solver=next
// check-pass
#![feature(coroutines, coroutine_trait, coroutine_clone)]
// This stalls the goal `{coroutine} <: impl Clone`, since that has a nested goal
// of `{coroutine}: Clone`. That is only known if we can compute the generator
// witness types, which we don't know until after borrowck. When we later check
// the goal for correctness, we want to be able to bind the `impl Clone` opaque.
pub fn foo<'a, 'b>() -> impl Clone {
move |_: ()| {
let () = yield ();
}
}
fn main() {}