Trait Component 

pub trait Component: Sized + 'static {
    type Tracking: Tracking;
}

Available on crate feature thread_local only.

Indicates that a struct or enum can be store in the World.

Required Associated Types

type Tracking: Tracking

Kind of event to track for this component.

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