1 files changed, 72 insertions, 0 deletions
diff --git a/tests/rustdoc/issue-43869.rs b/tests/rustdoc/issue-43869.rs
new file mode 100644
index 000000000..767d09d85
--- /dev/null
+++ b/tests/rustdoc/issue-43869.rs
@@ -0,0 +1,72 @@
+pub fn g() -> impl Iterator<Item=u8> {
+    Some(1u8).into_iter()
+}
+
+#[allow(unused_parens)]
+pub fn h() -> (impl Iterator<Item=u8>) {
+    Some(1u8).into_iter()
+}
+
+pub fn i() -> impl Iterator<Item=u8> + 'static {
+    Some(1u8).into_iter()
+}
+
+pub fn j() -> impl Iterator<Item=u8> + Clone {
+    Some(1u8).into_iter()
+}
+
+pub fn k() -> [impl Clone; 2] {
+    [123u32, 456u32]
+}
+
+pub fn l() -> (impl Clone, impl Default) {
+    (789u32, -123i32)
+}
+
+pub fn m() -> &'static impl Clone {
+    &1u8
+}
+
+pub fn n() -> *const impl Clone {
+    &1u8
+}
+
+pub fn o() -> &'static [impl Clone] {
+    b":)"
+}
+
+// issue #44731
+pub fn test_44731_0() -> Box<impl Iterator<Item=u8>> {
+    Box::new(g())
+}
+
+pub fn test_44731_1() -> Result<Box<impl Clone>, ()> {
+    Ok(Box::new(j()))
+}
+
+// NOTE these involve Fn sugar, where impl Trait is disallowed for now, see issue #45994
+//
+//pub fn test_44731_2() -> Box<Fn(impl Clone)> {
+//    Box::new(|_: u32| {})
+//}
+//
+//pub fn test_44731_3() -> Box<Fn() -> impl Clone> {
+//    Box::new(|| 0u32)
+//}
+
+pub fn test_44731_4() -> Box<Iterator<Item=impl Clone>> {
+    Box::new(g())
+}
+
+// @has issue_43869/fn.g.html
+// @has issue_43869/fn.h.html
+// @has issue_43869/fn.i.html
+// @has issue_43869/fn.j.html
+// @has issue_43869/fn.k.html
+// @has issue_43869/fn.l.html
+// @has issue_43869/fn.m.html
+// @has issue_43869/fn.n.html
+// @has issue_43869/fn.o.html
+// @has issue_43869/fn.test_44731_0.html
+// @has issue_43869/fn.test_44731_1.html
+// @has issue_43869/fn.test_44731_4.html