[rustc.git] / src / test / ui / traits / object / bounds-cycle-2.rs

// Check that we don't have a cycle when we try to normalize `Self::V` in the
// bound below.

// check-pass

trait Is {
    type T;
}

impl<U> Is for U {
    type T = U;
}

trait Super {
    type V;
}

trait Obj: Super {
    type U: Is<T = Self::V>;
}

fn is_obj<T: ?Sized + Obj>(_: &T) {}

fn f(x: &dyn Obj<U = i32, V = i32>) {
    is_obj(x)
}

fn main() {}
Commit	Line	Data
29967ef6 XL	1	// Check that we don't have a cycle when we try to normalize `Self::V` in the
	2	// bound below.
	3
	4	// check-pass
	5
	6	trait Is {
	7	type T;
	8	}
	9
	10	impl<U> Is for U {
	11	type T = U;
	12	}
	13
	14	trait Super {
	15	type V;
	16	}
	17
	18	trait Obj: Super {
	19	type U: Is<T = Self::V>;
	20	}
	21
	22	fn is_obj<T: ?Sized + Obj>(_: &T) {}
	23
	24	fn f(x: &dyn Obj<U = i32, V = i32>) {
	25	is_obj(x)
	26	}
	27
	28	fn main() {}