Do not require T: Clone for EventLoopProxy<T>: Clone (#1086)

* Do not require `T: Clone` for `EventLoopProxy<T>: Clone`

* Update `CHANGELOG.md`

* Remove the conflicting `Clone` impl

* Fix match statement

src/platform_impl/linux/mod.rs

@@ -479,12 +479,20 @@ pub enum EventLoop<T: 'static> {
     X(x11::EventLoop<T>),
 }
 
-#[derive(Clone)]
 pub enum EventLoopProxy<T: 'static> {
     X(x11::EventLoopProxy<T>),
     Wayland(wayland::EventLoopProxy<T>),
 }
 
+impl<T: 'static> Clone for EventLoopProxy<T> {
+    fn clone(&self) -> Self {
+        match self {
+            EventLoopProxy::X(proxy) => EventLoopProxy::X(proxy.clone()),
+            EventLoopProxy::Wayland(proxy) => EventLoopProxy::Wayland(proxy.clone()),
+        }
+    }
+}
+
 impl<T: 'static> EventLoop<T> {
     pub fn new() -> EventLoop<T> {
         if let Ok(env_var) = env::var(BACKEND_PREFERENCE_ENV_VAR) {

src/platform_impl/linux/wayland/event_loop.rs

@@ -90,7 +90,6 @@ pub struct EventLoop<T: 'static> {
 // A handle that can be sent across threads and used to wake up the `EventLoop`.
 //
 // We should only try and wake up the `EventLoop` if it still exists, so we hold Weak ptrs.
-#[derive(Clone)]
 pub struct EventLoopProxy<T: 'static> {
     user_sender: ::calloop::channel::Sender<T>,
 }
@@ -111,6 +110,14 @@ pub struct EventLoopWindowTarget<T> {
     _marker: ::std::marker::PhantomData<T>,
 }
 
+impl<T: 'static> Clone for EventLoopProxy<T> {
+    fn clone(&self) -> Self {
+        EventLoopProxy {
+            user_sender: self.user_sender.clone(),
+        }
+    }
+}
+
 impl<T: 'static> EventLoopProxy<T> {
     pub fn send_event(&self, event: T) -> Result<(), EventLoopClosed> {
         self.user_sender.send(event).map_err(|_| EventLoopClosed)

src/platform_impl/linux/x11/mod.rs

@@ -66,11 +66,18 @@ pub struct EventLoop<T: 'static> {
     target: Rc<RootELW<T>>,
 }
 
-#[derive(Clone)]
 pub struct EventLoopProxy<T: 'static> {
     user_sender: ::calloop::channel::Sender<T>,
 }
 
+impl<T: 'static> Clone for EventLoopProxy<T> {
+    fn clone(&self) -> Self {
+        EventLoopProxy {
+            user_sender: self.user_sender.clone(),
+        }
+    }
+}
+
 impl<T: 'static> EventLoop<T> {
     pub fn new(xconn: Arc<XConnection>) -> EventLoop<T> {
         let root = unsafe { (xconn.xlib.XDefaultRootWindow)(xconn.display) };