mirror of
https://github.com/bevyengine/bevy
synced 2024-12-21 02:23:08 +00:00
c7ec456e50
# Objective - Fixes #14924 - Closes #9584 ## Solution - We introduce a new trait, `SystemInput`, that serves as a type function from the `'static` form of the input, to its lifetime'd version, similarly to `SystemParam` or `WorldQuery`. - System functions now take the lifetime'd wrapped version, `SystemInput::Param<'_>`, which prevents the issue presented in #14924 (i.e. `InRef<T>`). - Functions for running systems now take the lifetime'd unwrapped version, `SystemInput::Inner<'_>` (i.e. `&T`). - Due to the above change, system piping had to be re-implemented as a standalone type, rather than `CombinatorSystem` as it was previously. - Removes the `Trigger<'static, E, B>` transmute in observer runner code. ## Testing - All current tests pass. - Added additional tests and doc-tests. --- ## Showcase ```rust let mut world = World::new(); let mut value = 2; // Currently possible: fn square(In(input): In<usize>) -> usize { input * input } value = world.run_system_once_with(value, square); // Now possible: fn square_mut(InMut(input): InMut<usize>) { *input *= *input; } world.run_system_once_with(&mut value, square_mut); // Or: fn square_ref(InRef(input): InRef<usize>) -> usize { *input * *input } value = world.run_system_once_with(&value, square_ref); ``` ## Migration Guide - All current explicit usages of the following types must be changed in the way specified: - `SystemId<I, O>` to `SystemId<In<I>, O>` - `System<In = T>` to `System<In = In<T>>` - `IntoSystem<I, O, M>` to `IntoSystem<In<I>, O, M>` - `Condition<M, T>` to `Condition<M, In<T>>` - `In<Trigger<E, B>>` is no longer a valid input parameter type. Use `Trigger<E, B>` directly, instead. --------- Co-authored-by: Giacomo Stevanato <giaco.stevanato@gmail.com> |
||
|---|---|---|
| .. | ||
| entity | ||
| event | ||
| identifier | ||
| observer | ||
| query | ||
| reflect | ||
| schedule | ||
| storage | ||
| system | ||
| world | ||
| archetype.rs | ||
| batching.rs | ||
| bundle.rs | ||
| change_detection.rs | ||
| component.rs | ||
| intern.rs | ||
| label.rs | ||
| lib.rs | ||
| removal_detection.rs | ||
| traversal.rs | ||