Add compatibility shim for asyncio.Future creation.

Should provide better support for uvloop.

discord/client.py

@@ -678,7 +678,7 @@ class Client:
 
             return result
 
-        future = asyncio.Future(loop=self.loop)
+        future = compat.create_future(self.loop)
         self._listeners.append((predicate, future, WaitForType.message))
         try:
             message = yield from asyncio.wait_for(future, timeout, loop=self.loop)
@@ -788,7 +788,7 @@ class Client:
 
             return result
 
-        future = asyncio.Future(loop=self.loop)
+        future = compat.create_future(self.loop)
         self._listeners.append((predicate, future, WaitForType.reaction))
         try:
             return (yield from asyncio.wait_for(future, timeout, loop=self.loop))

discord/compat.py

@@ -31,6 +31,15 @@ try:
 except AttributeError:
     create_task = asyncio.async
 
+try:
+    _create_future = asyncio.AbstractEventLoop.create_future
+except AttributeError:
+    def create_future(loop):
+        return asyncio.Future(loop=loop)
+else:
+    def create_future(loop):
+        return loop.create_future()
+
 try:
     run_coroutine_threadsafe = asyncio.run_coroutine_threadsafe
 except AttributeError:

discord/gateway.py

@@ -234,7 +234,7 @@ class DiscordWebSocket(websockets.client.WebSocketClientProtocol):
             A future to wait for.
         """
 
-        future = asyncio.Future(loop=self.loop)
+        future = compat.create_future(self.loop)
         entry = EventListener(event=event, predicate=predicate, result=result, future=future)
         self._dispatch_listeners.append(entry)
         return future

discord/state.py

@@ -739,7 +739,7 @@ class ConnectionState:
         return Message(state=self, channel=channel, data=data)
 
     def receive_chunk(self, guild_id):
-        future = asyncio.Future(loop=self.loop)
+        future = compat.create_future(self.loop)
         listener = Listener(ListenerType.chunk, future, lambda s: s.id == guild_id)
         self._listeners.append(listener)
         return future