Trait bevy_ecs::system::ReadOnlySystem

pub unsafe trait ReadOnlySystem: System { }

System types that do not modify the World when run. This is implemented for any systems whose parameters all implement ReadOnlySystemParam.

Safety

This must only be implemented for system types which do not mutate the World.

Implementors

impl<A, B, Func> ReadOnlySystem for CombinatorSystem<Func, A, B>where Func: Combine<A, B> + 'static, A: ReadOnlySystem, B: ReadOnlySystem,

SAFETY: Both systems are read-only, so any system created by combining them will only read from the world.

impl<Marker, F> ReadOnlySystem for FunctionSystem<Marker, F>where Marker: 'static, F: SystemParamFunction<Marker>, F::Param: ReadOnlySystemParam,

SAFETY: F’s param is ReadOnlySystemParam, so this system will only read from the world.