split -server and -tls msrv and raise to 1.52 (#398)

actix-service/examples/clone.rs

@@ -0,0 +1,33 @@
+use std::{future::Future, sync::mpsc, time::Duration};
+
+async fn oracle<F, Fut>(f: F) -> (u32, u32)
+where
+    F: FnOnce() -> Fut + Clone + Send + 'static,
+    Fut: Future<Output = u32> + 'static,
+{
+    let f1 = actix_rt::spawn(f.clone()());
+    let f2 = actix_rt::spawn(f());
+
+    (f1.await.unwrap(), f2.await.unwrap())
+}
+
+#[actix_rt::main]
+async fn main() {
+    let (tx, rx) = mpsc::channel();
+
+    let (r1, r2) = oracle({
+        let tx = tx.clone();
+
+        || async move {
+            tx.send(()).unwrap();
+            4 * 4
+        }
+    })
+    .await;
+    assert_eq!(r1, r2);
+
+    tx.send(()).unwrap();
+
+    rx.recv_timeout(Duration::from_millis(100)).unwrap();
+    rx.recv_timeout(Duration::from_millis(100)).unwrap();
+}