Trait SystemBuffer

pub trait SystemBuffer:
    FromWorld
    + Send
    + 'static {
    // Required method
    fn apply(&mut self, system_meta: &SystemMeta, world: &mut World);

    // Provided method
    fn queue(&mut self, _system_meta: &SystemMeta, _world: DeferredWorld<'_>) { ... }
}

Types that can be used with Deferred<T> in systems. This allows storing system-local data which is used to defer World mutations.

Types that implement SystemBuffer should take care to perform as many computations up-front as possible. Buffers cannot be applied in parallel, so you should try to minimize the time spent in SystemBuffer::apply.

Required Methods

fn apply(&mut self, system_meta: &SystemMeta, world: &mut World)

Applies any deferred mutations to the World.

Provided Methods

fn queue(&mut self, _system_meta: &SystemMeta, _world: DeferredWorld<'_>)

Queues any deferred mutations to be applied at the next apply_deferred.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl SystemBuffer for CommandQueue