mirror of
https://github.com/bevyengine/bevy
synced 2024-11-26 06:30:19 +00:00
ddbfa48711
# Objective
The `QueryParIter::for_each_mut` function is required when doing
parallel iteration with mutable queries.
This results in an unfortunate stutter:
`query.par_iter_mut().par_for_each_mut()` ('mut' is repeated).
## Solution
- Make `for_each` compatible with mutable queries, and deprecate
`for_each_mut`. In order to prevent `for_each` from being called
multiple times in parallel, we take ownership of the QueryParIter.
---
## Changelog
- `QueryParIter::for_each` is now compatible with mutable queries.
`for_each_mut` has been deprecated as it is now redundant.
## Migration Guide
The method `QueryParIter::for_each_mut` has been deprecated and is no
longer functional. Use `for_each` instead, which now supports mutable
queries.
```rust
// Before:
query.par_iter_mut().for_each_mut(|x| ...);
// After:
query.par_iter_mut().for_each(|x| ...);
```
The method `QueryParIter::for_each` now takes ownership of the
`QueryParIter`, rather than taking a shared reference.
```rust
// Before:
let par_iter = my_query.par_iter().batching_strategy(my_batching_strategy);
par_iter.for_each(|x| {
// ...Do stuff with x...
par_iter.for_each(|y| {
// ...Do nested stuff with y...
});
});
// After:
my_query.par_iter().batching_strategy(my_batching_strategy).for_each(|x| {
// ...Do stuff with x...
my_query.par_iter().batching_strategy(my_batching_strategy).for_each(|y| {
// ...Do nested stuff with y...
});
});
```
|
||
|---|---|---|
| .. | ||
| apply_deferred.rs | ||
| component_change_detection.rs | ||
| custom_query_param.rs | ||
| ecs_guide.rs | ||
| event.rs | ||
| fixed_timestep.rs | ||
| generic_system.rs | ||
| hierarchy.rs | ||
| iter_combinations.rs | ||
| nondeterministic_system_order.rs | ||
| parallel_query.rs | ||
| removal_detection.rs | ||
| run_conditions.rs | ||
| startup_system.rs | ||
| state.rs | ||
| system_closure.rs | ||
| system_param.rs | ||
| system_piping.rs | ||
| timers.rs | ||