Add tests

1 files changed, 15 insertions, 0 deletions

diff --git a/tests/ui/async-await/async-fn/impl-trait.rs b/tests/ui/async-await/async-fn/impl-trait.rs
new file mode 100644
index 00000000000..97f6696fe14
--- /dev/null
+++ b/tests/ui/async-await/async-fn/impl-trait.rs
@@ -0,0 +1,15 @@
+// edition:2018
+// check-pass
+
+#![feature(async_closure, type_alias_impl_trait)]
+
+type Tait = impl async Fn();
+fn tait() -> Tait {
+    || async {}
+}
+
+fn foo(x: impl async Fn()) -> impl async Fn() { x }
+
+fn param<T: async Fn()>() {}
+
+fn main() {}