Trait System 

pub trait System: 'static {
    // Required method
    fn run(&mut self, world: &World, resources: &Resources);

    // Provided method
    fn requires(&self) -> Vec<RequiredResource> { ... }
}

A type-erased, executable system.

Required Methods

fn run(&mut self, world: &World, resources: &Resources)

Provided Methods

fn requires(&self) -> Vec<RequiredResource>

Resource types this system needs present, derived automatically from its bare Res/ResMut parameters. App checks these before running a non-convergent stage’s systems and panics with a clear message naming the missing resource(s) rather than letting a param fetch panic deep inside whichever system happens to run first.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl<S: System, C: RunCondition> System for Conditional<S, C>

impl<T, A, B, C, D, E, F, G, H, I, J, K, L> System for FunctionSystem<T, (A, B, C, D, E, F, G, H, I, J, K, L), (A::State, B::State, C::State, D::State, E::State, F::State, G::State, H::State, I::State, J::State, K::State, L::State)>

where T: for<'a> FnMut(A::Item<'a>, B::Item<'a>, C::Item<'a>, D::Item<'a>, E::Item<'a>, F::Item<'a>, G::Item<'a>, H::Item<'a>, I::Item<'a>, J::Item<'a>, K::Item<'a>, L::Item<'a>) + 'static, A: SystemParam + 'static, B: SystemParam + 'static, C: SystemParam + 'static, D: SystemParam + 'static, E: SystemParam + 'static, F: SystemParam + 'static, G: SystemParam + 'static, H: SystemParam + 'static, I: SystemParam + 'static, J: SystemParam + 'static, K: SystemParam + 'static, L: SystemParam + 'static,

impl<T, A, B, C, D, E, F, G, H, I, J, K> System for FunctionSystem<T, (A, B, C, D, E, F, G, H, I, J, K), (A::State, B::State, C::State, D::State, E::State, F::State, G::State, H::State, I::State, J::State, K::State)>

where T: for<'a> FnMut(A::Item<'a>, B::Item<'a>, C::Item<'a>, D::Item<'a>, E::Item<'a>, F::Item<'a>, G::Item<'a>, H::Item<'a>, I::Item<'a>, J::Item<'a>, K::Item<'a>) + 'static, A: SystemParam + 'static, B: SystemParam + 'static, C: SystemParam + 'static, D: SystemParam + 'static, E: SystemParam + 'static, F: SystemParam + 'static, G: SystemParam + 'static, H: SystemParam + 'static, I: SystemParam + 'static, J: SystemParam + 'static, K: SystemParam + 'static,

impl<T, A, B, C, D, E, F, G, H, I, J> System for FunctionSystem<T, (A, B, C, D, E, F, G, H, I, J), (A::State, B::State, C::State, D::State, E::State, F::State, G::State, H::State, I::State, J::State)>

where T: for<'a> FnMut(A::Item<'a>, B::Item<'a>, C::Item<'a>, D::Item<'a>, E::Item<'a>, F::Item<'a>, G::Item<'a>, H::Item<'a>, I::Item<'a>, J::Item<'a>) + 'static, A: SystemParam + 'static, B: SystemParam + 'static, C: SystemParam + 'static, D: SystemParam + 'static, E: SystemParam + 'static, F: SystemParam + 'static, G: SystemParam + 'static, H: SystemParam + 'static, I: SystemParam + 'static, J: SystemParam + 'static,

impl<T, A, B, C, D, E, F, G, H, I> System for FunctionSystem<T, (A, B, C, D, E, F, G, H, I), (A::State, B::State, C::State, D::State, E::State, F::State, G::State, H::State, I::State)>

where T: for<'a> FnMut(A::Item<'a>, B::Item<'a>, C::Item<'a>, D::Item<'a>, E::Item<'a>, F::Item<'a>, G::Item<'a>, H::Item<'a>, I::Item<'a>) + 'static, A: SystemParam + 'static, B: SystemParam + 'static, C: SystemParam + 'static, D: SystemParam + 'static, E: SystemParam + 'static, F: SystemParam + 'static, G: SystemParam + 'static, H: SystemParam + 'static, I: SystemParam + 'static,

impl<T, A, B, C, D, E, F, G, H> System for FunctionSystem<T, (A, B, C, D, E, F, G, H), (A::State, B::State, C::State, D::State, E::State, F::State, G::State, H::State)>

where T: for<'a> FnMut(A::Item<'a>, B::Item<'a>, C::Item<'a>, D::Item<'a>, E::Item<'a>, F::Item<'a>, G::Item<'a>, H::Item<'a>) + 'static, A: SystemParam + 'static, B: SystemParam + 'static, C: SystemParam + 'static, D: SystemParam + 'static, E: SystemParam + 'static, F: SystemParam + 'static, G: SystemParam + 'static, H: SystemParam + 'static,

impl<T, A, B, C, D, E, F, G> System for FunctionSystem<T, (A, B, C, D, E, F, G), (A::State, B::State, C::State, D::State, E::State, F::State, G::State)>

where T: for<'a> FnMut(A::Item<'a>, B::Item<'a>, C::Item<'a>, D::Item<'a>, E::Item<'a>, F::Item<'a>, G::Item<'a>) + 'static, A: SystemParam + 'static, B: SystemParam + 'static, C: SystemParam + 'static, D: SystemParam + 'static, E: SystemParam + 'static, F: SystemParam + 'static, G: SystemParam + 'static,

impl<T, A, B, C, D, E, F> System for FunctionSystem<T, (A, B, C, D, E, F), (A::State, B::State, C::State, D::State, E::State, F::State)>

where T: for<'a> FnMut(A::Item<'a>, B::Item<'a>, C::Item<'a>, D::Item<'a>, E::Item<'a>, F::Item<'a>) + 'static, A: SystemParam + 'static, B: SystemParam + 'static, C: SystemParam + 'static, D: SystemParam + 'static, E: SystemParam + 'static, F: SystemParam + 'static,

impl<T, A, B, C, D, E> System for FunctionSystem<T, (A, B, C, D, E), (A::State, B::State, C::State, D::State, E::State)>

where T: for<'a> FnMut(A::Item<'a>, B::Item<'a>, C::Item<'a>, D::Item<'a>, E::Item<'a>) + 'static, A: SystemParam + 'static, B: SystemParam + 'static, C: SystemParam + 'static, D: SystemParam + 'static, E: SystemParam + 'static,

impl<T, A, B, C, D> System for FunctionSystem<T, (A, B, C, D), (A::State, B::State, C::State, D::State)>

where T: for<'a> FnMut(A::Item<'a>, B::Item<'a>, C::Item<'a>, D::Item<'a>) + 'static, A: SystemParam + 'static, B: SystemParam + 'static, C: SystemParam + 'static, D: SystemParam + 'static,

impl<T, A, B, C> System for FunctionSystem<T, (A, B, C), (A::State, B::State, C::State)>

where T: for<'a> FnMut(A::Item<'a>, B::Item<'a>, C::Item<'a>) + 'static, A: SystemParam + 'static, B: SystemParam + 'static, C: SystemParam + 'static,

impl<T, A, B> System for FunctionSystem<T, (A, B), (A::State, B::State)>

where T: for<'a> FnMut(A::Item<'a>, B::Item<'a>) + 'static, A: SystemParam + 'static, B: SystemParam + 'static,

impl<T, A> System for FunctionSystem<T, (A,), (A::State,)>

where T: for<'a> FnMut(A::Item<'a>) + 'static, A: SystemParam + 'static,

impl<T> System for FunctionSystem<T, (), ()>

where T: for<'a> FnMut() + 'static,