Add discard methods for optimisation

rt/task.hpp

@@ -74,12 +74,34 @@ namespace typon
       return awaitable { _coroutine };
     }
 
+    auto discard() && noexcept
+    {
+      struct awaitable : suspend_always
+      {
+        coroutine_handle<promise_type> _coroutine;
+
+        coroutine_handle<> await_suspend(coroutine_handle<> awaiting_coroutine) noexcept
+        {
+          _coroutine.promise()._continuation = awaiting_coroutine;
+          return _coroutine;
+        }
+      };
+
+      return awaitable { {}, _coroutine };
+    }
+
     decltype(auto) call() &&
     {
       _coroutine.promise()._continuation = noop_coroutine();
       _coroutine.resume();
       return _coroutine.promise().get();
     }
+
+    void call_discard() &&
+    {
+      _coroutine.promise()._continuation = noop_coroutine();
+      _coroutine.resume();
+    }
   };
   
 }