Fix Send requirements in WebAssembly builds

debug/src/lib.rs

@@ -413,7 +413,7 @@ mod internal {
     }
 }
 
-#[cfg(feature = "hot")]
+#[cfg(all(feature = "hot", not(target_arch = "wasm32")))]
 mod hot {
     use std::collections::BTreeSet;
     use std::sync::atomic::{self, AtomicBool};
@@ -478,7 +478,7 @@ mod hot {
     }
 }
 
-#[cfg(not(feature = "hot"))]
+#[cfg(any(not(feature = "hot"), target_arch = "wasm32"))]
 mod hot {
     pub fn init() {}
 
@@ -486,7 +486,7 @@ mod hot {
         f()
     }
 
-    pub fn on_hotpatch(_f: impl Fn() + Send + Sync + 'static) {}
+    pub fn on_hotpatch(_f: impl Fn()) {}
 
     pub fn is_stale() -> bool {
         false

program/src/lib.rs

@@ -15,7 +15,7 @@ use crate::core::text;
 use crate::core::theme;
 use crate::core::window;
 use crate::core::{Element, Font, Settings};
-use crate::futures::{Executor, MaybeSend, Subscription};
+use crate::futures::{Executor, Subscription};
 use crate::graphics::compositor;
 use crate::runtime::Task;
 
@@ -29,7 +29,7 @@ pub trait Program: Sized {
     type State;
 
     /// The message of the program.
-    type Message: MaybeSend + 'static;
+    type Message: Send + 'static;
 
     /// The theme of the program.
     type Theme: Default + theme::Base;

src/application.rs

@@ -36,8 +36,7 @@ use crate::shell;
 use crate::theme;
 use crate::window;
 use crate::{
-    Element, Executor, Font, MaybeSend, Preset, Result, Settings, Size,
+    Element, Executor, Font, Preset, Result, Settings, Size, Subscription, Task,
-    Subscription, Task,
 };
 
 use iced_debug as debug;
@@ -83,7 +82,7 @@ pub fn application<State, Message, Theme, Renderer>(
 ) -> Application<impl Program<State = State, Message = Message, Theme = Theme>>
 where
     State: 'static,
-    Message: MaybeSend + 'static,
+    Message: Send + 'static,
     Theme: Default + theme::Base,
     Renderer: program::Renderer,
 {
@@ -102,7 +101,7 @@ where
     impl<State, Message, Theme, Renderer, Boot, Update, View> Program
         for Instance<State, Message, Theme, Renderer, Boot, Update, View>
     where
-        Message: MaybeSend + 'static,
+        Message: Send + 'static,
         Theme: Default + theme::Base,
         Renderer: program::Renderer,
         Boot: self::Boot<State, Message>,
@@ -201,7 +200,7 @@ impl<P: Program> Application<P> {
         #[cfg(all(feature = "debug", not(feature = "tester")))]
         let program = iced_devtools::attach(self);
 
-        #[cfg(any(not(feature = "debug"), target_arch = "wasm32"))]
+        #[cfg(not(any(feature = "tester", feature = "debug")))]
         let program = self;
 
         Ok(shell::run(program)?)

src/daemon.rs

@@ -6,8 +6,7 @@ use crate::shell;
 use crate::theme;
 use crate::window;
 use crate::{
-    Element, Executor, Font, MaybeSend, Preset, Result, Settings, Subscription,
+    Element, Executor, Font, Preset, Result, Settings, Subscription, Task,
-    Task,
 };
 
 use iced_debug as debug;
@@ -31,7 +30,7 @@ pub fn daemon<State, Message, Theme, Renderer>(
 ) -> Daemon<impl Program<State = State, Message = Message, Theme = Theme>>
 where
     State: 'static,
-    Message: MaybeSend + 'static,
+    Message: Send + 'static,
     Theme: Default + theme::Base,
     Renderer: program::Renderer,
 {
@@ -50,7 +49,7 @@ where
     impl<State, Message, Theme, Renderer, Boot, Update, View> Program
         for Instance<State, Message, Theme, Renderer, Boot, Update, View>
     where
-        Message: MaybeSend + 'static,
+        Message: Send + 'static,
         Theme: Default + theme::Base,
         Renderer: program::Renderer,
         Boot: application::Boot<State, Message>,

src/lib.rs

@@ -528,7 +528,6 @@ pub use crate::core::{
 pub use crate::program::Preset;
 pub use crate::program::message;
 pub use crate::runtime::exit;
-pub use crate::runtime::futures::MaybeSend;
 pub use iced_futures::Subscription;
 
 pub use Alignment::Center;
@@ -698,7 +697,7 @@ pub fn run<State, Message, Theme, Renderer>(
 ) -> Result
 where
     State: Default + 'static,
-    Message: MaybeSend + message::MaybeDebug + message::MaybeClone + 'static,
+    Message: Send + message::MaybeDebug + message::MaybeClone + 'static,
     Theme: Default + theme::Base + 'static,
     Renderer: program::Renderer + 'static,
 {

winit/src/proxy.rs

@@ -77,10 +77,7 @@ impl<T: 'static> Proxy<T> {
     ///
     /// Note: This skips the backpressure mechanism with an unbounded
     /// channel. Use sparingly!
-    pub fn send(&self, value: T)
+    pub fn send(&self, value: T) {
-    where
-        T: std::fmt::Debug,
-    {
         self.send_action(Action::Output(value));
     }