3 #![feature(unboxed_closures)]
5 fn is_fn<T: for<'a> Fn<(&'a (),)>>() {}
6 fn is_fn2<T: for<'a, 'b> Fn<(&'a &'b (),)>>() {}
8 struct Outlives<'a, 'b>(std::marker::PhantomData<&'a &'b ()>);
11 is_fn::<for<'a> fn(&'a ()) -> &'a ()>();
12 is_fn::<for<'a> fn(&'a ()) -> &'a dyn std::fmt::Debug>();
13 is_fn2::<for<'a, 'b> fn(&'a &'b ()) -> Outlives<'a, 'b>>();
14 is_fn2::<for<'a, 'b> fn(&'a &'b ()) -> (&'a (), &'a ())>();