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https://github.com/bevyengine/bevy
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# Objective - Fixes #13844 - Warn user when initializing state multiple times ## Solution - `insert_state` will overwrite previously initialized state value, reset transition events and re-insert it's own transition event. - `init_state`, `add_sub_state`, `add_computed_state` are idempotent, so calling them multiple times will emit a warning. ## Testing - 2 tests confirming overwrite works. - Given the example from #13844 ```rs use bevy::prelude::*; fn main() { App::new() .add_plugins(DefaultPlugins) .insert_state(AppState::A) .insert_state(AppState::B) .add_systems(OnEnter(AppState::A), setup_a) .add_systems(OnEnter(AppState::B), setup_b) .add_systems(OnExit(AppState::A), cleanup_a) .add_systems(OnExit(AppState::B), cleanup_b) .run(); } #[derive(States, Debug, Clone, PartialEq, Eq, Hash)] enum AppState { A, B, } fn setup_a() { info!("setting up A"); } fn setup_b() { info!("setting up B"); } fn cleanup_a() { info!("cleaning up A"); } fn cleanup_b() { info!("cleaning up B"); } ``` We get the following result: ``` INFO states: setting up B ``` which matches our expectations. |
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