simplify

src/main.rs

@@ -1,37 +1,37 @@
 use std::marker::PhantomData;
 
-use futures::{stream, StreamExt, Future};
+use futures::{stream, Future, StreamExt};
 
 pub struct JoinHandle<T> {
-    raw: Option<()>,
-    id: u64,
     _p: PhantomData<T>,
 }
 
 impl<T> Future for JoinHandle<T> {
     type Output = Result<T, ()>;
 
-    fn poll(self: std::pin::Pin<&mut Self>, cx: &mut std::task::Context<'_>) -> std::task::Poll<Self::Output> {
+    fn poll(
+        self: std::pin::Pin<&mut Self>,
+        cx: &mut std::task::Context<'_>,
+    ) -> std::task::Poll<Self::Output> {
         loop {}
     }
 }
 
 pub fn spawn<T>(future: T) -> JoinHandle<T::Output>
 where
-    T: Future + Send + 'static,
+    T: Future,
-    T::Output: Send + 'static,
 {
     loop {}
 }
 
 fn main() {
     let bodies = stream::iter([])
-        .map(|url: String| spawn(async move { Result::Ok((url, "A".to_owned())) }))
+        .map(|url: String| spawn(async { Result::Ok(url) }))
         .buffer_unordered(0);
 
     bodies.for_each(|b| async {
         match b {
-            Ok(Ok((url, b))) => {}
+            Ok(Ok(url)) => {}
             Err(e) => {}
             Ok(Err(e)) => {}
         }