diff options
Diffstat (limited to 'src/test/ui/generic-associated-types/issue-76826.rs')
-rw-r--r-- | src/test/ui/generic-associated-types/issue-76826.rs | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/test/ui/generic-associated-types/issue-76826.rs b/src/test/ui/generic-associated-types/issue-76826.rs new file mode 100644 index 000000000..28eb3b0e7 --- /dev/null +++ b/src/test/ui/generic-associated-types/issue-76826.rs @@ -0,0 +1,44 @@ +// run-pass + +#![feature(generic_associated_types)] + +pub trait Iter { + type Item<'a> where Self: 'a; + + fn next<'a>(&'a mut self) -> Option<Self::Item<'a>>; + + fn for_each<F>(mut self, mut f: F) + where Self: Sized, F: for<'a> FnMut(Self::Item<'a>) + { + while let Some(item) = self.next() { + f(item); + } + } +} + +pub struct Windows<T> { + items: Vec<T>, + start: usize, + len: usize, +} + +impl<T> Windows<T> { + pub fn new(items: Vec<T>, len: usize) -> Self { + Self { items, start: 0, len } + } +} + +impl<T> Iter for Windows<T> { + type Item<'a> = &'a mut [T] where T: 'a; + + fn next<'a>(&'a mut self) -> Option<Self::Item<'a>> { + let slice = self.items.get_mut(self.start..self.start + self.len)?; + self.start += 1; + Some(slice) + } +} + +fn main() { + Windows::new(vec![1, 2, 3, 4, 5], 3) + .for_each(|slice| println!("{:?}", slice)); +} |