v0.6.0

• Removed Send + Sync requirements from all data in the World, including components, handlers, and events. World is now !Send + !Sync.
• Added Deref and DerefMut impls for Single, TrySingle, Has<Q>.
• Allow sending events with borrowed data in World::send.
• Removed 'static bound from Event.
• Event is now split into separate GlobalEvent and TargetedEvent traits (which inherit from the base Event trait). Use the derive macros to safely implement them.
• Redesigned how targeted events are represented and sent. Use World::send_to and Sender::send_to.
• Event::IS_IMMUTABLE and Component::IS_IMMUTABLE have been replaced with marker types for use in where clauses. See evenio::mutability.
• Removed World::send_many.
• Fixed bug where entities could spawn with identical entity IDs.
• Set MSRV to 1.78.0
• Improved diagnostics for add_handler compiler errors.
• Added Fetcher::get_unchecked.
• Changed some unit structs into uninhabited enums.

v0.5.0

• Redesign component access checking. Complex queries will now pass the component access checker in more cases.
• Improve diagnostics for component access errors.
• Redesign Config interface to hide implementation details. (Now named HandlerConfig).
• Removed bit_set and sparse modules from public API.
• Added Fetcher::get_many_mut.
• Removed AliasedMutability variant from GetError and added GetManyMutError.

v0.4.2

• Fixed bug in entity despawning.

v0.4.1

• Impl Send and Sync for UnsafeWorldCell and Fetcher.
• Removed dependency on memoffset.

v0.4.0

• Renamed "system" to "handler" to avoid confusion with other ECS libraries.
• Removed Column::component_index. To obtain the component index of a column, use Archetype::component_indices.
• Fixed bug related to handler ordering. Handlers with the same priority always run in the order they were added to the world.
• Changed alignment of identifier types to match u64.
• Renamed Priority::{Before, Normal, After} to Priority::{High, Medium, Low}.
• Renamed World::{get_component, get_component_mut} to World::{get, get_mut}.
• Fixed empty fetcher iteration bug.

v0.3.0

• Fixed bug that occurs when changing event target archetype while broadcasting.
• Changed behavior of event queue. The next event in the queue is handled only once the current event has finished broadcasting.
• Changed EventPtr interface and relaxed Send and Sync bounds for EventMut.
• Fixed buggy behavior when mutating the target of a broadcasting event.

v0.2.2

• Update documentation

v0.2.1

• Added Rayon parallel iterator for Fetcher, available behind the rayon feature flag.
• Fixed archetype refresh bugs and changed semantics of refresh_archetype.
• Fixed potential "cannot shadow tuple struct with let binding" errors in derived Query and SystemParam impls.
• Added #[must_use] attribute to iterators.
• Relaxed auto trait impls for various types.
• Minor performance improvements.