Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 19 insertions, 0 deletions

diff --git a/src/test/ui/associated-types/associated-types-doubleendediterator-object.rs b/src/test/ui/associated-types/associated-types-doubleendediterator-object.rs
new file mode 100644
index 000000000..05498ba63
--- /dev/null
+++ b/src/test/ui/associated-types/associated-types-doubleendediterator-object.rs
@@ -0,0 +1,19 @@
+// run-pass
+
+fn pairwise_sub(mut t: Box<dyn DoubleEndedIterator<Item=isize>>) -> isize {
+    let mut result = 0;
+    loop {
+        let front = t.next();
+        let back = t.next_back();
+        match (front, back) {
+            (Some(f), Some(b)) => { result += b - f; }
+            _ => { return result; }
+        }
+    }
+}
+
+fn main() {
+    let v = vec![1, 2, 3, 4, 5, 6];
+    let r = pairwise_sub(Box::new(v.into_iter()));
+    assert_eq!(r, 9);
+}