diff options
Diffstat (limited to 'engine-ecs/src/sole.rs')
| -rw-r--r-- | engine-ecs/src/sole.rs | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/engine-ecs/src/sole.rs b/engine-ecs/src/sole.rs index 9168414..cf5283b 100644 --- a/engine-ecs/src/sole.rs +++ b/engine-ecs/src/sole.rs @@ -7,7 +7,7 @@ use crate::component::{ WithAssociatedId as ComponentWithAssociatedId, }; use crate::system::{Metadata as SystemMetadata, Param as SystemParam}; -use crate::World; +use crate::{Component, World}; /// A component which has a single instance in the [`World`]. pub trait Sole: Any + IntoComponentParts + ComponentWithAssociatedId @@ -20,6 +20,11 @@ pub trait Sole: Any + IntoComponentParts + ComponentWithAssociatedId fn name(&self) -> &'static str; } +/// Marker component for the entities of soles. +#[derive(Debug, Component)] +#[non_exhaustive] +pub struct Is; + /// Holds a reference to a singleton component. #[derive(Debug)] pub struct Single<'world, SoleT: Sole> |