1 files changed, 5 insertions, 2 deletions
diff --git a/engine/src/lib.rs b/engine/src/lib.rs
index 9400e56..6d7c213 100644
--- a/engine/src/lib.rs
+++ b/engine/src/lib.rs
@@ -3,10 +3,12 @@
 
 use ecs::component::Sequence as ComponentSequence;
 use ecs::entity::Uid as EntityUid;
-use ecs::event::Event;
+use ecs::event::component::ComponentToAddedEvent;
+use ecs::event::{Event, Sequence as EventSequence};
 use ecs::extension::Extension;
 use ecs::sole::Sole;
 use ecs::system::{Into, System};
+use ecs::tuple::Reduce as TupleReduce;
 use ecs::{SoleAlreadyExistsError, World};
 
 use crate::delta_time::{update as update_delta_time, DeltaTime, LastUpdate};
@@ -75,7 +77,8 @@ impl Engine
 
     pub fn spawn<Comps>(&mut self, components: Comps) -> EntityUid
     where
-        Comps: ComponentSequence,
+        Comps: ComponentSequence + TupleReduce<ComponentToAddedEvent>,
+        Comps::Out: EventSequence,
     {
         self.world.create_entity(components)
     }