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# Objective - Use `AppTypeRegistry` on API defined in `bevy_ecs` (https://github.com/bevyengine/bevy/pull/8895#discussion_r1234748418) A lot of the API on `Reflect` depends on a registry. When it comes to the ECS. We should use `AppTypeRegistry` in the general case. This is however impossible in `bevy_ecs`, since `AppTypeRegistry` is defined in `bevy_app`. ## Solution - Move `AppTypeRegistry` resource definition from `bevy_app` to `bevy_ecs` - Still add the resource in the `App` plugin, since bevy_ecs itself doesn't know of plugins Note that `bevy_ecs` is a dependency of `bevy_app`, so nothing revolutionary happens. ## Alternative - Define the API as a trait in `bevy_app` over `bevy_ecs`. (though this prevents us from using bevy_ecs internals) - Do not rely on `AppTypeRegistry` for the API in question, requring users to extract themselves the resource and pass it to the API methods. --- ## Changelog - Moved `AppTypeRegistry` resource definition from `bevy_app` to `bevy_ecs` ## Migration Guide - If you were **not** using a `prelude::*` to import `AppTypeRegistry`, you should update your imports: ```diff - use bevy::app::AppTypeRegistry; + use bevy::ecs::reflect::AppTypeRegistry ``` |
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| .. | ||
| bevy_a11y | ||
| bevy_animation | ||
| bevy_app | ||
| bevy_asset | ||
| bevy_audio | ||
| bevy_core | ||
| bevy_core_pipeline | ||
| bevy_derive | ||
| bevy_diagnostic | ||
| bevy_dylib | ||
| bevy_dynamic_plugin | ||
| bevy_ecs | ||
| bevy_ecs_compile_fail_tests | ||
| bevy_encase_derive | ||
| bevy_gilrs | ||
| bevy_gizmos | ||
| bevy_gltf | ||
| bevy_hierarchy | ||
| bevy_input | ||
| bevy_internal | ||
| bevy_log | ||
| bevy_macro_utils | ||
| bevy_macros_compile_fail_tests | ||
| bevy_math | ||
| bevy_mikktspace | ||
| bevy_pbr | ||
| bevy_ptr | ||
| bevy_reflect | ||
| bevy_reflect_compile_fail_tests | ||
| bevy_render | ||
| bevy_scene | ||
| bevy_sprite | ||
| bevy_tasks | ||
| bevy_text | ||
| bevy_time | ||
| bevy_transform | ||
| bevy_ui | ||
| bevy_utils | ||
| bevy_window | ||
| bevy_winit | ||