Return to just `TaskId`, still polling

examples/compose.rs

@@ -19,8 +19,7 @@ fn app(cx: Scope) -> Element {
                 emails_sent.write().push(message);
             }
         }
-    })
-    .unwrap();
+    });
 
     cx.render(rsx! {
         div {

packages/core/src/scheduler/task.rs

@@ -33,11 +33,7 @@ impl Scheduler {
     ///
     /// Spawning a future onto the root scope will cause it to be dropped when the root component is dropped - which
     /// will only occur when the VirtuaalDom itself has been dropped.
-    pub fn spawn(
-        &self,
-        scope: ScopeId,
-        task: impl Future<Output = ()> + 'static,
-    ) -> Option<TaskId> {
+    pub fn spawn(&self, scope: ScopeId, task: impl Future<Output = ()> + 'static) -> TaskId {
         let mut tasks = self.tasks.borrow_mut();
 
         let entry = tasks.vacant_entry();
@@ -53,9 +49,7 @@ impl Scheduler {
         };
 
         let mut cx = std::task::Context::from_waker(&task.waker);
-        if task.task.borrow_mut().as_mut().poll(&mut cx).is_ready() {
-            return None;
-        }
+        let _ = task.task.borrow_mut().as_mut().poll(&mut cx);
 
         entry.insert(task);
 
@@ -63,7 +57,7 @@ impl Scheduler {
             .unbounded_send(SchedulerMsg::TaskNotified(task_id))
             .expect("Scheduler should exist");
 
-        Some(task_id)
+        task_id
     }
 
     /// Drop the future with the given TaskId

packages/core/src/scope_context.rs

@@ -214,10 +214,10 @@ impl ScopeContext {
     }
 
     /// Pushes the future onto the poll queue to be polled after the component renders.
-    pub fn push_future(&self, fut: impl Future<Output = ()> + 'static) -> Option<TaskId> {
-        let id = self.tasks.spawn(self.id, fut)?;
+    pub fn push_future(&self, fut: impl Future<Output = ()> + 'static) -> TaskId {
+        let id = self.tasks.spawn(self.id, fut);
         self.spawned_tasks.borrow_mut().insert(id);
-        Some(id)
+        id
     }
 
     /// Spawns the future but does not return the [`TaskId`]
@@ -228,9 +228,9 @@ impl ScopeContext {
     /// Spawn a future that Dioxus won't clean up when this component is unmounted
     ///
     /// This is good for tasks that need to be run after the component has been dropped.
-    pub fn spawn_forever(&self, fut: impl Future<Output = ()> + 'static) -> Option<TaskId> {
+    pub fn spawn_forever(&self, fut: impl Future<Output = ()> + 'static) -> TaskId {
         // The root scope will never be unmounted so we can just add the task at the top of the app
-        let id = self.tasks.spawn(ScopeId::ROOT, fut)?;
+        let id = self.tasks.spawn(ScopeId::ROOT, fut);
 
         // wake up the scheduler if it is sleeping
         self.tasks
@@ -240,7 +240,7 @@ impl ScopeContext {
 
         self.spawned_tasks.borrow_mut().insert(id);
 
-        Some(id)
+        id
     }
 
     /// Informs the scheduler that this task is no longer needed and should be removed.
@@ -339,7 +339,7 @@ pub fn throw(error: impl Debug + 'static) -> Option<()> {
 
 /// Pushes the future onto the poll queue to be polled after the component renders.
 pub fn push_future(fut: impl Future<Output = ()> + 'static) -> Option<TaskId> {
-    with_current_scope(|cx| cx.push_future(fut)).flatten()
+    with_current_scope(|cx| cx.push_future(fut))
 }
 
 /// Spawns the future but does not return the [`TaskId`]
@@ -351,7 +351,7 @@ pub fn spawn(fut: impl Future<Output = ()> + 'static) {
 ///
 /// This is good for tasks that need to be run after the component has been dropped.
 pub fn spawn_forever(fut: impl Future<Output = ()> + 'static) -> Option<TaskId> {
-    with_current_scope(|cx| cx.spawn_forever(fut)).flatten()
+    with_current_scope(|cx| cx.spawn_forever(fut))
 }
 
 /// Informs the scheduler that this task is no longer needed and should be removed.

packages/core/src/scopes.rs

@@ -309,7 +309,7 @@ impl<'src> ScopeState {
     }
 
     /// Pushes the future onto the poll queue to be polled after the component renders.
-    pub fn push_future(&self, fut: impl Future<Output = ()> + 'static) -> Option<TaskId> {
+    pub fn push_future(&self, fut: impl Future<Output = ()> + 'static) -> TaskId {
         self.context().push_future(fut)
     }
 
@@ -321,7 +321,7 @@ impl<'src> ScopeState {
     /// Spawn a future that Dioxus won't clean up when this component is unmounted
     ///
     /// This is good for tasks that need to be run after the component has been dropped.
-    pub fn spawn_forever(&self, fut: impl Future<Output = ()> + 'static) -> Option<TaskId> {
+    pub fn spawn_forever(&self, fut: impl Future<Output = ()> + 'static) -> TaskId {
         self.context().spawn_forever(fut)
     }
 

packages/fullstack/src/hooks/server_future.rs

@@ -76,7 +76,7 @@ where
             cx.remove_future(current);
         }
 
-        state.task.set(cx.push_future(async move {
+        state.task.set(Some(cx.push_future(async move {
             let data;
             #[cfg(feature = "ssr")]
             {
@@ -94,7 +94,7 @@ where
             *value.borrow_mut() = Some(Box::new(data));
 
             schedule_update();
-        }));
+        })));
     }
 
     if first_run {

packages/hooks/src/use_coroutine.rs

@@ -63,15 +63,15 @@ use std::future::Future;
 ///     }
 /// })
 /// ```
-pub fn use_coroutine<M, G, F>(cx: &ScopeState, init: G) -> Option<&Coroutine<M>>
+pub fn use_coroutine<M, G, F>(cx: &ScopeState, init: G) -> &Coroutine<M>
 where
     M: 'static,
     G: FnOnce(UnboundedReceiver<M>) -> F,
     F: Future<Output = ()> + 'static,
 {
     let (tx, rx) = futures_channel::mpsc::unbounded();
-    let task = cx.push_future(init(rx))?;
-    Some(cx.use_hook(|| cx.provide_context(Coroutine { tx, task })))
+    let task = cx.push_future(init(rx));
+    cx.use_hook(|| cx.provide_context(Coroutine { tx, task }))
 }
 
 /// Get a handle to a coroutine higher in the tree

packages/hooks/src/use_effect.rs

@@ -99,9 +99,8 @@ where
         // Create the new future
         let return_value = future(dependencies.out());
 
-        if let Some(task) = return_value.apply(state.cleanup.clone(), cx) {
-            state.task.set(Some(task));
-        }
+        let task = return_value.apply(state.cleanup.clone(), cx);
+        state.task.set(Some(task));
     }
 }
 
@@ -109,14 +108,14 @@ type UseEffectCleanup = Rc<RefCell<Option<Box<dyn FnOnce()>>>>;
 
 /// Something that can be returned from a `use_effect` hook.
 pub trait UseEffectReturn<T> {
-    fn apply(self, oncleanup: UseEffectCleanup, cx: &ScopeState) -> Option<TaskId>;
+    fn apply(self, oncleanup: UseEffectCleanup, cx: &ScopeState) -> TaskId;
 }
 
 impl<T> UseEffectReturn<()> for T
 where
     T: Future<Output = ()> + 'static,
 {
-    fn apply(self, _: UseEffectCleanup, cx: &ScopeState) -> Option<TaskId> {
+    fn apply(self, _: UseEffectCleanup, cx: &ScopeState) -> TaskId {
         cx.push_future(self)
     }
 }
@@ -128,7 +127,7 @@ where
     T: Future<Output = F> + 'static,
     F: FnOnce() + 'static,
 {
-    fn apply(self, oncleanup: UseEffectCleanup, cx: &ScopeState) -> Option<TaskId> {
+    fn apply(self, oncleanup: UseEffectCleanup, cx: &ScopeState) -> TaskId {
         cx.push_future(async move {
             let cleanup = self.await;
             *oncleanup.borrow_mut() = Some(Box::new(cleanup) as Box<dyn FnOnce()>);

packages/hooks/src/use_future.rs

@@ -49,10 +49,10 @@ where
         let val = val.clone();
         let task = state.task.clone();
 
-        state.task.set(cx.push_future(async move {
+        state.task.set(Some(cx.push_future(async move {
             val.set(Some(fut.await));
             task.take();
-        }));
+        })));
 
         // Mark that we don't need to regenerate
         state.needs_regen.set(false);