1 files changed, 32 insertions, 0 deletions
diff --git a/tests/ui/iterators/into-iter-on-arrays-2021.rs b/tests/ui/iterators/into-iter-on-arrays-2021.rs
new file mode 100644
index 000000000..158317efe
--- /dev/null
+++ b/tests/ui/iterators/into-iter-on-arrays-2021.rs
@@ -0,0 +1,32 @@
+// check-pass
+// edition:2021
+
+use std::array::IntoIter;
+use std::ops::Deref;
+use std::rc::Rc;
+
+fn main() {
+    let array = [0; 10];
+
+    // In 2021, the method dispatches to `IntoIterator for [T; N]`.
+    let _: IntoIter<i32, 10> = array.into_iter();
+    let _: IntoIter<i32, 10> = Box::new(array).into_iter();
+
+    // The `array_into_iter` lint doesn't cover other wrappers that deref to an array.
+    let _: IntoIter<i32, 10> = Rc::new(array).into_iter();
+    let _: IntoIter<i32, 10> = Array(array).into_iter();
+
+    // You can always use the trait method explicitly as an array.
+    let _: IntoIter<i32, 10> = IntoIterator::into_iter(array);
+}
+
+/// User type that dereferences to an array.
+struct Array([i32; 10]);
+
+impl Deref for Array {
+    type Target = [i32; 10];
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}