rust/tests/ui/impl-trait/bounds_regression.rs

25 lines
432 B
Rust

// run-pass
pub trait FakeCoroutine {
type Yield;
type Return;
}
pub trait FakeFuture {
type Output;
}
pub fn future_from_coroutine<
T: FakeCoroutine<Yield = ()>
>(x: T) -> impl FakeFuture<Output = T::Return> {
GenFuture(x)
}
struct GenFuture<T: FakeCoroutine<Yield = ()>>(#[allow(dead_code)] T);
impl<T: FakeCoroutine<Yield = ()>> FakeFuture for GenFuture<T> {
type Output = T::Return;
}
fn main() {}