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# Objective - While developing a debug tool I saw the gap where it was not possible to get all existing states from a World using reflection. - This PR allows to iterate over all `States` types that exist in a world, and modify them in case they implement `FreelyMutableState`. - Two new methods are available on `App` and `SubApp` as helper to register the data types: - `register_state_reflect` and `register_mutable_state_reflect` ## Solution - Two new data types are added: - `ReflectState`: Allows to extract the current value of a state from the World. - `ReflectFreelyMutableState`: Allows to set the next state in a world, similar to call `NextState::set`. - There is no distinction between `States`, `SubStates` and `ComputedStates`: - `States` can register both `ReflectState` and `ReflectFreelyMutableState`. - `SubStates` can register both `ReflectState` and `ReflectFreelyMutableState`. - `ComputedStates` can register only `ReflectState` . ## Testing - Added tests inside the `bevy_state` crate. --------- Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com> Co-authored-by: Gino Valente <49806985+MrGVSV@users.noreply.github.com> Co-authored-by: Jan Hohenheim <jan@hohenheim.ch> |
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