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# Objective Closes #13017. ## Solution - Make `AppExit` a enum with a `Success` and `Error` variant. - Make `App::run()` return a `AppExit` if it ever returns. - Make app runners return a `AppExit` to signal if they encountered a error. --- ## Changelog ### Added - [`App::should_exit`](https://example.org/) - [`AppExit`](https://docs.rs/bevy/latest/bevy/app/struct.AppExit.html) to the `bevy` and `bevy_app` preludes, ### Changed - [`AppExit`](https://docs.rs/bevy/latest/bevy/app/struct.AppExit.html) is now a enum with 2 variants (`Success` and `Error`). - The app's [runner function](https://docs.rs/bevy/latest/bevy/app/struct.App.html#method.set_runner) now has to return a `AppExit`. - [`App::run()`](https://docs.rs/bevy/latest/bevy/app/struct.App.html#method.run) now also returns the `AppExit` produced by the runner function. ## Migration Guide - Replace all usages of [`AppExit`](https://docs.rs/bevy/latest/bevy/app/struct.AppExit.html) with `AppExit::Success` or `AppExit::Failure`. - Any custom app runners now need to return a `AppExit`. We suggest you return a `AppExit::Error` if any `AppExit` raised was a Error. You can use the new [`App::should_exit`](https://example.org/) method. - If not exiting from `main` any other way. You should return the `AppExit` from `App::run()` so the app correctly returns a error code if anything fails e.g. ```rust fn main() -> AppExit { App::new() //Your setup here... .run() } ``` --------- Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com> |
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