1 // revisions: base extended
3 #![cfg_attr(extended, feature(generic_associated_types_extended))]
4 #![cfg_attr(extended, allow(incomplete_features))]
6 trait StreamingIterator {
7 type Item<'a> where Self: 'a;
8 fn size_hint(&self) -> (usize, Option<usize>);
9 // Uncommenting makes `StreamingIterator` not object safe
10 // fn next(&mut self) -> Self::Item<'_>;
13 fn min_size(x: &mut dyn for<'a> StreamingIterator<Item<'a> = &'a i32>) -> usize {
14 //[base]~^ the trait `StreamingIterator` cannot be made into an object
16 //[extended]~^ borrowed data escapes