wip: slowly putting it back together

crates/tek_core/src/exit.rs

@@ -1,3 +1,5 @@
+use crate::*;
+
 pub trait Exit: Send {
     fn exited (&self) -> bool;
     fn exit (&mut self);
@@ -18,3 +20,11 @@ pub trait Exit: Send {
         }
     }
 }
+
+/// Marker trait for [Component]s that can [Exit]
+pub trait ExitableComponent<E>: Exit + Component<E> where E: Engine {
+    /// Perform type erasure for collecting heterogeneous components.
+    fn boxed (self) -> Box<dyn ExitableComponent<E>> where Self: Sized + 'static {
+        Box::new(self)
+    }
+}