1 files changed, 46 insertions, 0 deletions
diff --git a/src/test/ui/generic-associated-types/iterable.rs b/src/test/ui/generic-associated-types/iterable.rs
new file mode 100644
index 000000000..af0049891
--- /dev/null
+++ b/src/test/ui/generic-associated-types/iterable.rs
@@ -0,0 +1,46 @@
+#![feature(generic_associated_types)]
+
+// run-pass
+
+trait Iterable {
+    type Item<'a> where Self: 'a;
+    type Iter<'a>: Iterator<Item = Self::Item<'a>> where Self: 'a;
+
+    fn iter<'a>(&'a self) -> Self::Iter<'a>;
+}
+
+// Impl for struct type
+impl<T> Iterable for Vec<T> {
+    type Item<'a> = <std::slice::Iter<'a, T> as Iterator>::Item where T: 'a;
+    type Iter<'a> = std::slice::Iter<'a, T> where T: 'a;
+
+    fn iter<'a>(&'a self) -> Self::Iter<'a> {
+        self[..].iter()
+    }
+}
+
+// Impl for a primitive type
+impl<T> Iterable for [T] {
+    type Item<'a> = <std::slice::Iter<'a, T> as Iterator>::Item where T: 'a;
+    type Iter<'a> = std::slice::Iter<'a, T> where T: 'a;
+
+    fn iter<'a>(&'a self) -> Self::Iter<'a> {
+        self.iter()
+    }
+}
+
+fn make_iter<'a, I: Iterable + ?Sized>(it: &'a I) -> I::Iter<'a> {
+    it.iter()
+}
+
+fn get_first<'a, I: Iterable + ?Sized>(it: &'a I) -> Option<I::Item<'a>> {
+    it.iter().next()
+}
+
+fn main() {
+    let v = vec![1, 2, 3];
+    assert_eq!(v, make_iter(&v).copied().collect::<Vec<_>>());
+    assert_eq!(v, make_iter(&*v).copied().collect::<Vec<_>>());
+    assert_eq!(Some(&1), get_first(&v));
+    assert_eq!(Some(&1), get_first(&*v));
+}