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https://github.com/bevyengine/bevy
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# Objective
Support the following syntax for adding systems:
```rust
App::new()
.add_system(setup.on_startup())
.add_systems((
show_menu.in_schedule(OnEnter(GameState::Paused)),
menu_ssytem.in_set(OnUpdate(GameState::Paused)),
hide_menu.in_schedule(OnExit(GameState::Paused)),
))
```
## Solution
Add the traits `IntoSystemAppConfig{s}`, which provide the extension methods necessary for configuring which schedule a system belongs to. These extension methods return `IntoSystemAppConfig{s}`, which `App::add_system{s}` uses to choose which schedule to add systems to.
---
## Changelog
+ Added the extension methods `in_schedule(label)` and `on_startup()` for configuring the schedule a system belongs to.
## Future Work
* Replace all uses of `add_startup_system` in the engine.
* Deprecate this method
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|---|---|---|
| .. | ||
| 2d_shapes.rs | ||
| mesh2d.rs | ||
| mesh2d_manual.rs | ||
| mesh2d_vertex_color_texture.rs | ||
| move_sprite.rs | ||
| pixel_perfect.rs | ||
| rotation.rs | ||
| sprite.rs | ||
| sprite_flipping.rs | ||
| sprite_sheet.rs | ||
| text2d.rs | ||
| texture_atlas.rs | ||
| transparency_2d.rs | ||