3 trait Itble<'r, T, I: Iterator<Item=T>> { fn iter(&'r self) -> I; }
5 impl<'r> Itble<'r, usize, Range<usize>> for (usize, usize) {
6 fn iter(&'r self) -> Range<usize> {
7 let &(min, max) = self;
12 fn check<'r, I: Iterator<Item=usize>, T: Itble<'r, usize, I>>(cont: &T) -> bool
14 let cont_iter = cont.iter();
15 //~^ ERROR explicit lifetime required in the type of `cont` [E0621]
16 let result = cont_iter.fold(Some(0), |state, val| {
17 state.map_or(None, |mask| {
19 if mask & bit == 0 {Some(mask|bit)} else {None}