[rustc.git] / src / test / ui / impl-trait / issues / issue-67830.rs

trait MyFn<Arg> {
    type Output;
    fn call(&self, arg: Arg) -> Self::Output;
}

struct Wrap<F>(F);

impl<A, B, F> MyFn<A> for Wrap<F>
where
    F: Fn(A) -> B
{
    type Output = B;

    fn call(&self, arg: A) -> Self::Output {
        (self.0)(arg)
    }
}


struct A;
fn test() -> impl for<'a> MyFn<&'a A, Output=impl Iterator + 'a> {
    //~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet
    Wrap(|a| Some(a).into_iter())
}

fn main() {}
Commit	Line	Data
ee023bcb FG	1	trait MyFn<Arg> {
	2	type Output;
	3	fn call(&self, arg: Arg) -> Self::Output;
	4	}
	5
	6	struct Wrap<F>(F);
	7
	8	impl<A, B, F> MyFn<A> for Wrap<F>
	9	where
	10	F: Fn(A) -> B
	11	{
	12	type Output = B;
	13
	14	fn call(&self, arg: A) -> Self::Output {
	15	(self.0)(arg)
	16	}
	17	}
	18
	19
	20	struct A;
	21	fn test() -> impl for<'a> MyFn<&'a A, Output=impl Iterator + 'a> {
	22	//~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet
	23	Wrap(\|a\| Some(a).into_iter())
	24	}
	25
	26	fn main() {}