Initial commit, make remove callbacks invoke on empty components

Author: Kelwan

ecsact/entt/runtime.hh

@@ -1028,16 +1028,41 @@ private:
 				if constexpr(C::transient) {
 					return;
 				}
+			});
+		}
 
-				if(comp.component_id == static_cast<ecsact_component_id>(C::id)) {
-					if constexpr(!std::is_empty_v<C>) {
-						_pre_exec_update_component<C>(
-							info,
-							info.entities_map.at(entity),
-							*static_cast<const C*>(comp.component_data)
+		void _trigger_remove_component_events
+			( registry_info&               info
+			, execution_events_collector&  events_collector
+			)
+		{
+			using boost::mp11::mp_for_each;
+
+			mp_for_each<typename package::components>([&]<typename C>(C) {
+				if constexpr(C::transient) return;
+
+				if constexpr(std::is_empty_v<C>) {
+					::entt::basic_view removed_view{
+						info.registry.template storage<component_removed<C>>(),
+					};
+					for(entt_entity_type entity : empty_removed_view<C>) {
+						events_collector.invoke_remove_callback<C>(
+							info.get_ecsact_entity_id(entity)
+						);
+					}
+				} else {
+					::entt::basic_view removed_view{
+						info.registry.template storage<detail::temp_storage<C>>(),
+						info.registry.template storage<component_removed<C>>(),
+					};
+					for(entt_entity_type entity : stored_removed_view<C>) {
+						events_collector.invoke_remove_callback<C>(
+							info.get_ecsact_entity_id(entity),
+							removed_view.template get<detail::temp_storage<C>>(entity).value
+						);
+						info.registry.template storage<detail::temp_storage<C>>().remove(
+							entity
 						);
-					} else {
-						assert(!std::is_empty_v<C>);
 					}
 				}
 			});