Commit graph

549 commits

Author SHA1 Message Date
Aceeri
f0c512731b SystemParam for the name of the system you are currently in (#5731)
# Objective
- Similar to `SystemChangeTick`, probably somewhat useful for debugging messages.

---

## Changelog

- Added `SystemName` which copies the `SystemMeta::name` field so it can be accessed within a system.
2022-08-18 18:31:12 +00:00
JoJoJet
3221e569e0 Remove an outdated workaround for impl Trait (#5659)
# Objective

Rust 1.63 resolved [an issue](https://github.com/rust-lang/rust/issues/83701) that prevents you from combining explicit generic arguments with `impl Trait` arguments.

Now, we no longer need to use dynamic dispatch to work around this.

## Migration Guide

The methods `Schedule::get_stage` and `get_stage_mut` now accept `impl StageLabel` instead of `&dyn StageLabel`.

### Before
```rust
let stage = schedule.get_stage_mut::<SystemStage>(&MyLabel)?;
```

### After
```rust
let stage = schedule.get_stage_mut::<SystemStage>(MyLabel)?;
```
2022-08-16 23:40:24 +00:00
Boutillier
de6bef72a1 Fix for bevy CI on main - clippy safety comments on trait. (#5665)
# Objective

Make CI pass on bevy main.

Update to rust-1.63, updated clippy to 1.63 which introduced the following enhancements:
- [undocumented_unsafe_blocks](https://rust-lang.github.io/rust-clippy/master/index.html#undocumented_unsafe_blocks): Now also lints on unsafe trait implementations

This caught two incorrectly written ( but existing) safety comments for unsafe  traits.

## Solution

Fix the comment to use `SAFETY:`
2022-08-13 10:51:19 +00:00
Jakob Hellermann
5595733035 drop old value in insert_resource_by_id if exists (#5587)
# Objective

While trying out the lint `unsafe_op_in_unsafe_fn` I noticed that `insert_resource_by_id` didn't drop the old value if it already existed, and reimplemented `Column::replace` manually for no apparent reason.

## Solution

- use `Column::replace` and add a test expecting the correct drop count

---

## Changelog

- `World::insert_resource_by_id` will now correctly drop the old resource value, if one already existed
2022-08-09 18:05:43 +00:00
Alex
fe97b384a5 fix: typo in system params docs (#5624)
# Objective

- Fix a typo on `SystemParam` docs

## Solution
- added 'be'.
- Hurray my first OSS PR! 

---
2022-08-09 16:53:27 +00:00
Jakob Hellermann
fcb77d6988 remove ReflectMut in favor of Mut<dyn Reflect> (#5630)
# Objective

- `ReflectMut` served no purpose that wasn't met by `Mut<dyn Reflect>` which is easier to understand since you have to deal with fewer types
- there is another `ReflectMut` type that could be confused with this one

## Solution/Changelog

- relax `T: ?Sized` bound in `Mut<T>`
- replace all instances of `ReflectMut` with `Mut<dyn Reflect>`
2022-08-09 16:19:34 +00:00
Nicola Papale
397b6df023 Add into_world_mut to EntityMut (#5586)
# Objective

Provide a safe API to access an `EntityMut`'s `World`.

## Solution

* Add `EntityMut::into_world_mut` for safe access to the entity's world.

---

## Changelog

* Add `EntityMut::into_world_mut` for safe access to the entity's world.
2022-08-08 22:59:18 +00:00
ira
992681b59b Make Resource trait opt-in, requiring #[derive(Resource)] V2 (#5577)
*This PR description is an edited copy of #5007, written by @alice-i-cecile.*
# Objective
Follow-up to https://github.com/bevyengine/bevy/pull/2254. The `Resource` trait currently has a blanket implementation for all types that meet its bounds.

While ergonomic, this results in several drawbacks:

* it is possible to make confusing, silent mistakes such as inserting a function pointer (Foo) rather than a value (Foo::Bar) as a resource
* it is challenging to discover if a type is intended to be used as a resource
* we cannot later add customization options (see the [RFC](https://github.com/bevyengine/rfcs/blob/main/rfcs/27-derive-component.md) for the equivalent choice for Component).
* dependencies can use the same Rust type as a resource in invisibly conflicting ways
* raw Rust types used as resources cannot preserve privacy appropriately, as anyone able to access that type can read and write to internal values
* we cannot capture a definitive list of possible resources to display to users in an editor
## Notes to reviewers
 * Review this commit-by-commit; there's effectively no back-tracking and there's a lot of churn in some of these commits.
   *ira: My commits are not as well organized :')*
 * I've relaxed the bound on Local to Send + Sync + 'static: I don't think these concerns apply there, so this can keep things simple. Storing e.g. a u32 in a Local is fine, because there's a variable name attached explaining what it does.
 * I think this is a bad place for the Resource trait to live, but I've left it in place to make reviewing easier. IMO that's best tackled with https://github.com/bevyengine/bevy/issues/4981.

## Changelog
`Resource` is no longer automatically implemented for all matching types. Instead, use the new `#[derive(Resource)]` macro.

## Migration Guide
Add `#[derive(Resource)]` to all types you are using as a resource.

If you are using a third party type as a resource, wrap it in a tuple struct to bypass orphan rules. Consider deriving `Deref` and `DerefMut` to improve ergonomics.

`ClearColor` no longer implements `Component`. Using `ClearColor` as a component in 0.8 did nothing.
Use the `ClearColorConfig` in the `Camera3d` and `Camera2d` components instead.


Co-authored-by: Alice <alice.i.cecile@gmail.com>
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
Co-authored-by: devil-ira <justthecooldude@gmail.com>
Co-authored-by: Carter Anderson <mcanders1@gmail.com>
2022-08-08 21:36:35 +00:00
github-actions[bot]
444150025d Bump Version after Release (#5576)
Bump version after release
This PR has been auto-generated
2022-08-05 02:03:05 +00:00
Marc-Stefan Cassola
765e8d7dca Fix lifetime bound on From impl for NonSendMut -> Mut (#5560)
# Objective

Fixes #5456
2022-08-04 22:09:51 +00:00
Boxy
eabcd27d93 make WorldQuery very flat (#5205)
# Objective

Simplify the worldquery trait hierarchy as much as possible by putting it all in one trait. If/when gats are stabilised this can be trivially migrated over to use them, although that's not why I made this PR, those reasons are:
- Moves all of the conceptually related unsafe code for a worldquery next to eachother
- Removes now unnecessary traits simplifying the "type system magic" in bevy_ecs

---

## Changelog

All methods/functions/types/consts on `FetchState` and `Fetch` traits have been moved to the `WorldQuery` trait and the other traits removed. `WorldQueryGats` now only contains an `Item` and `Fetch` assoc type.

## Migration Guide
Implementors should move items in impls to the `WorldQuery/Gats` traits and remove any `Fetch`/`FetchState` impls
Any use sites of items in the `Fetch`/`FetchState` traits should be updated to use the `WorldQuery` trait items instead


Co-authored-by: Carter Anderson <mcanders1@gmail.com>
2022-08-04 21:51:02 +00:00
PROMETHIA-27
f3b5bf029c Add FromWorld bound to T in Local<T> (#5481)
# Objective

Currently, actually using a `Local` on a system requires that it be `T: FromWorld`, but that requirement is only expressed on the `SystemParam` machinery, which leads to the confusing error message for when the user attempts to add an invalid system. By adding these bounds to `Local` directly, it improves clarity on usage and semantics. 

## Solution

- Add `T: FromWorld` bound to `Local`'s definition

## Migration Guide

- It might be possible for references to `Local`s without `T: FromWorld` to exist, but these should be exceedingly rare and probably dead code. In the event that one of these is encountered, the easiest solutions are to delete the code or wrap the inner `T` in an `Option` to allow it to be default constructed to `None`.
2022-08-01 16:50:11 +00:00
github-actions[bot]
856588ed7c Release 0.8.0 (#5490)
Preparing next release
This PR has been auto-generated
2022-07-30 14:07:30 +00:00
ira
83a9e16158 Replace many_for_each_mut with iter_many_mut. (#5402)
# Objective
Replace `many_for_each_mut` with `iter_many_mut` using the same tricks to avoid aliased mutability that `iter_combinations_mut` uses.

<sub>I tried rebasing the draft PR I made for this before and it died. F</sub>
## Why
`many_for_each_mut` is worse for a few reasons:
1. The closure prevents the use of `continue`, `break`, and `return` behaves like a limited `continue`.
2. rustfmt will crumple it and double the indentation when the line gets too long.
    ```rust
    query.many_for_each_mut(
        &entity_list,
        |(mut transform, velocity, mut component_c)| {
            // Double trouble.
        },
    );
    ```
3. It is more surprising to have `many_for_each_mut` as a mutable counterpart to `iter_many` than `iter_many_mut`.
4. It required a separate unsafe fn; more unsafe code to maintain.
5. The `iter_many_mut` API matches the existing `iter_combinations_mut` API.

Co-authored-by: devil-ira <justthecooldude@gmail.com>
2022-07-30 01:38:13 +00:00
Boxy
be19c696bd Add missing ReadOnly = Self bound (#5462)
# Objective
`ReadOnlyWorldQuery` should have required `Self::ReadOnly = Self` so that calling `.iter()` on a readonly query is equivelent to calling `iter_mut()`.

## Solution

add `ReadOnly = Self` to the definition of `ReadOnlyWorldQuery`

---

## Changelog

ReadOnlyWorldQuery's `ReadOnly` assoc type is now always equal to `Self`

## Migration Guide

Make `Self::ReadOnly = Self` hold
2022-07-27 06:49:36 +00:00
Jerome Humbert
d4787111a3 Conversion of ResMut and NonSendMut to Mut (#5438)
# Objective

Enable treating components and resources equally, which can
simplify the implementation of some systems where only the change
detection feature is relevant and not the kind of object (resource or
component).

## Solution

Implement `From<ResMut<T>>` and `From<NonSendMut<T>>` for
`Mut`. Since the 3 structs are similar, and only differ by their system
param role, the conversion is trivial.

---

## Changelog

Added - `From<ResMut>` and `From<NonSendMut>` for `Mut<T>`.
2022-07-25 16:11:29 +00:00
Rob Parrett
cfee0e882e Fix various typos (#5417)
## Objective

- Fix some typos

## Solution

- Fix em. 
- My favorite was `maxizimed`
2022-07-21 20:46:54 +00:00
JoJoJet
56e9a3de88 improve documentation for macro-generated label types (#5367)
# Objective

I noticed while working on #5366 that the documentation for label types wasn't working correctly. Having experimented with this for a few weeks, I believe that generating docs in macros is more effort than it's worth.

## Solution

Add more boilerplate, copy-paste and edit the docs across types. This also lets us add custom doctests for specific types. Also, we don't need `concat_idents` as a dependency anymore.
2022-07-20 19:39:42 +00:00
harudagondi
959f3b1186 Allows conversion of mutable queries to immutable queries (#5376)
# Objective

- Allows conversion of mutable queries to immutable queries.
- Fixes #4606

## Solution

- Add `to_readonly` method on `Query`, which uses `QueryState::as_readonly`
- `AsRef` is not feasible because creation of new queries is needed.

---

## Changelog

### Added

- Allows conversion of mutable queries to immutable queries using `Query::to_readonly`.
2022-07-20 01:09:45 +00:00
François
0fa499a7d0 rename send_default_event to send_event_default on world (#5383)
after #5355, three methods were added on world:
* `send_event`
* `send_event_batch`
* `send_default_event`

rename `send_default_event` to `send_event_default` for better discoverability
2022-07-19 22:28:05 +00:00
Aevyrie
282f8ed0b9 Add helpers to send Events from World (#5355)
# Objective

- With access to `World`, it's not obvious how to send an event.
- This is especially useful if you are writing a `Command` that needs to send an `Event`.
- `Events` are a first-class construct in bevy, even though they are just `Resources` under the hood. Their methods should be discoverable.

## Solution

- Provide a simple helpers to send events through `Res<Events<T>>`.
---

## Changelog

> `send_event`, `send_default_event`, and `send_event_batch` methods added to `World`.
2022-07-19 20:54:03 +00:00
JoJoJet
44e9cd4bfc Add attribute to ignore fields of derived labels (#5366)
# Objective

Fixes #5362 

## Solution

Add the attribute `#[label(ignore_fields)]` for `*Label` types.

```rust
#[derive(SystemLabel)]
pub enum MyLabel {
    One,

    // Previously this was not allowed since labels cannot contain data.
    #[system_label(ignore_fields)]
    Two(PhantomData<usize>),
}
```

## Notes

This label makes it possible for equality to behave differently depending on whether or not you are treating the type as a label. For example:

```rust
#[derive(SystemLabel, PartialEq, Eq)]
#[system_label(ignore_fields)]
pub struct Foo(usize);
```

If you compare it as a label, it will ignore the wrapped fields as the user requested. But if you compare it as a `Foo`, the derive will incorrectly compare the inner fields. I see a few solutions

1. Do nothing. This is technically intended behavior, but I think we should do our best to prevent footguns.
2. Generate impls of `PartialEq` and `Eq` along with the `#[derive(Label)]` macros. This is a breaking change as it requires all users to remove these derives from their types.
3. Only allow `PhantomData` to be used with `ignore_fields` -- seems needlessly prescriptive.

---

## Changelog

* Added the `ignore_fields` attribute to the derive macros for `*Label` types.
* Added an example showing off different forms of the derive macro.

<!--
## Migration Guide

> This section is optional. If there are no breaking changes, you can delete this section.

- If this PR is a breaking change (relative to the last release of Bevy), describe how a user might need to migrate their code to support these changes
- Simply adding new functionality is not a breaking change.
- Fixing behavior that was definitely a bug, rather than a questionable design choice is not a breaking change.
-->
2022-07-19 05:21:19 +00:00
Boxy
1ac8a476cf remove QF generics from all Query/State methods and types (#5170)
# Objective

remove `QF` generics from a bunch of types and methods on query related items. this has a few benefits:
- simplifies type signatures `fn iter(&self) -> QueryIter<'_, 's, Q::ReadOnly, F::ReadOnly>` is (imo) conceptually simpler than `fn iter(&self) -> QueryIter<'_, 's, Q, ROQueryFetch<'_, Q>, F>`
- `Fetch` is mostly an implementation detail but previously we had to expose it on every `iter` `get` etc method
- Allows us to potentially in the future simplify the `WorldQuery` trait hierarchy by removing the `Fetch` trait

## Solution

remove the `QF` generic and add a way to (unsafely) turn `&QueryState<Q1, F1>` into `&QueryState<Q2, F2>`

---

## Changelog/Migration Guide

The `QF` generic was removed from various `Query` iterator types and some methods, you should update your code to use the type of the corresponding worldquery of the fetch type that was being used, or call `as_readonly`/`as_nop` to convert a querystate to the appropriate type. For example:
`.get_single_unchecked_manual::<ROQueryFetch<Q>>(..)` -> `.as_readonly().get_single_unchecked_manual(..)`
`my_field: QueryIter<'w, 's, Q, ROQueryFetch<'w, Q>, F>` -> `my_field: QueryIter<'w, 's, Q::ReadOnly, F::ReadOnly>`
2022-07-19 00:45:00 +00:00
JoJoJet
c43295af80 Simplify design for *Labels (#4957)
# Objective

- Closes #4954 
- Reduce the complexity of the `{System, App, *}Label` APIs.

## Solution

For the sake of brevity I will only refer to `SystemLabel`, but everything applies to all of the other label types as well.

- Add `SystemLabelId`, a lightweight, `copy` struct.
- Convert custom types into `SystemLabelId` using the trait `SystemLabel`.

## Changelog

- String literals implement `SystemLabel` for now, but this should be changed with #4409 .

## Migration Guide

- Any previous use of `Box<dyn SystemLabel>` should be replaced with `SystemLabelId`.
- `AsSystemLabel` trait has been modified.
    - No more output generics.
    - Method `as_system_label` now returns `SystemLabelId`, removing an unnecessary level of indirection.
- If you *need* a label that is determined at runtime, you can use `Box::leak`. Not recommended.

## Questions for later

* Should we generate a `Debug` impl along with `#[derive(*Label)]`?
* Should we rename `as_str()`?
* Should we remove the extra derives (such as `Hash`) from builtin `*Label` types?
* Should we automatically derive types like `Clone, Copy, PartialEq, Eq`?
* More-ergonomic comparisons between `Label` and `LabelId`.
* Move `Dyn{Eq, Hash,Clone}` somewhere else.
* Some API to make interning dynamic labels easier.
* Optimize string representation
    * Empty string for unit structs -- no debug info but faster comparisons
    * Don't show enum types -- same tradeoffs as asbove.
2022-07-14 18:23:01 +00:00
ira
234e5af882 Implement From<bool> for ShouldRun. (#5306)
Make writing simple yes/no run criteria easier.


Co-authored-by: devil-ira <justthecooldude@gmail.com>
2022-07-14 17:26:40 +00:00
Daniel Liu
fe59fe5860 Add assert_is_exclusive_system function (#5275)
Add compile time check for if a system is an exclusive system. Resolves #4788 

Co-authored-by: Daniel Liu <mr.picklepinosaur@gmail.com>
Co-authored-by: Daniel Liu <danieliu3120@gmail.com>
2022-07-14 01:12:15 +00:00
Nicola Papale
6c06fc5b7c Add ExactSizeIterator implementation for QueryCombinatonIter (#5148)
Following https://github.com/bevyengine/bevy/pull/5124 I decided to add the `ExactSizeIterator` impl for `QueryCombinationIter`.

Also:
- Clean up the tests for `size_hint` and `len` for both the normal `QueryIter` and `QueryCombinationIter`.
- Add tests to `QueryCombinationIter` when it shouldn't be `ExactSizeIterator`

---

## Changelog

- Added `ExactSizeIterator` implementation for `QueryCombinatonIter`
2022-07-13 16:08:48 +00:00
harudagondi
1dbb1f7b20 Allow iter combinations on custom world queries (#5286)
# Objective

- `.iter_combinations_*()` cannot be used on custom derived `WorldQuery`, so this fixes that
- Fixes #5284

## Solution

- `#[derive(Clone)]` on the `Fetch` of the proc macro derive.
- `#[derive(Clone)]` for `AnyOf` to satisfy tests.
2022-07-13 15:37:27 +00:00
JoJoJet
bb9706c96f Document exotic patterns for Commands and Events (#4840)
# Objective

Improve documentation, information users of the limitations in bevy's idiomatic patterns, and suggesting alternatives for when those limitations are encountered.

## Solution

* Add documentation to `Commands` informing the user of the option of writing one-shot commands with closures.
* Add documentation to `EventWriter` regarding the limitations of event types, and suggesting alternatives using commands.
2022-07-13 14:40:52 +00:00
CGMossa
93a131661d Very minor doc formatting changes (#5287)
# Objective

- Added a bunch of backticks to things that should have them, like equations, abstract variable names,
- Changed all small x, y, and z to capitals X, Y, Z.

This might be more annoying than helpful; Feel free to refuse this PR.
2022-07-12 13:06:16 +00:00
ira
4847f7e3ad Update codebase to use IntoIterator where possible. (#5269)
Remove unnecessary calls to `iter()`/`iter_mut()`.
Mainly updates the use of queries in our code, docs, and examples.

```rust
// From
for _ in list.iter() {
for _ in list.iter_mut() {

// To
for _ in &list {
for _ in &mut list {
```

We already enable the pedantic lint [clippy::explicit_iter_loop](https://rust-lang.github.io/rust-clippy/stable/) inside of Bevy. However, this only warns for a few known types from the standard library.

## Note for reviewers
As you can see the additions and deletions are exactly equal.
Maybe give it a quick skim to check I didn't sneak in a crypto miner, but you don't have to torture yourself by reading every line.
I already experienced enough pain making this PR :) 


Co-authored-by: devil-ira <justthecooldude@gmail.com>
2022-07-11 15:28:50 +00:00
Hennadii Chernyshchyk
1da6720132 Add apply_or_insert functions to reflected component and resources (#5201)
# Objective

`ReflectResource` and `ReflectComponent` will panic on `apply` method if there is no such component. It's not very ergonomic. And not very good for performance since I need to check if such component exists first.

## Solution

* Add `ReflectComponent::apply_or_insert` and `ReflectResource::apply_or_insert` functions.
* Rename `ReflectComponent::add` into `ReflectComponent::insert` for consistency.

---

## Changelog

### Added

* `ReflectResource::apply_or_insert` and `ReflectComponent::apply_on_insert`.

### Changed

* Rename `ReflectComponent::add` into `ReflectComponent::insert` for consistency.
* Use `ReflectComponent::apply_on_insert` in `DynamicScene` instead of manual checking.

## Migration Guide

* Rename `ReflectComponent::add` into `ReflectComponent::insert`.
2022-07-11 14:11:24 +00:00
Daniel McNab
7b2cf98896 Make RenderStage::Extract run on the render world (#4402)
# Objective

- Currently, the `Extract` `RenderStage` is executed on the main world, with the render world available as a resource.
- However, when needing access to resources in the render world (e.g. to mutate them), the only way to do so was to get exclusive access to the whole `RenderWorld` resource.
- This meant that effectively only one extract which wrote to resources could run at a time.
- We didn't previously make `Extract`ing writing to the world a non-happy path, even though we want to discourage that.

## Solution

- Move the extract stage to run on the render world.
- Add the main world as a `MainWorld` resource.
- Add an `Extract` `SystemParam` as a convenience to access a (read only) `SystemParam` in the main world during `Extract`.

## Future work

It should be possible to avoid needing to use `get_or_spawn` for the render commands, since now the `Commands`' `Entities` matches up with the world being executed on.
We need to determine how this interacts with https://github.com/bevyengine/bevy/pull/3519
It's theoretically possible to remove the need for the `value` method on `Extract`. However, that requires slightly changing the `SystemParam` interface, which would make it more complicated. That would probably mess up the `SystemState` api too.

## Todo
I still need to add doc comments to `Extract`.

---

## Changelog

### Changed
- The `Extract` `RenderStage` now runs on the render world (instead of the main world as before).
   You must use the `Extract` `SystemParam` to access the main world during the extract phase.
   Resources on the render world can now be accessed using `ResMut` during extract.

### Removed
- `Commands::spawn_and_forget`. Use `Commands::get_or_spawn(e).insert_bundle(bundle)` instead

## Migration Guide

The `Extract` `RenderStage` now runs on the render world (instead of the main world as before).
You must use the `Extract` `SystemParam` to access the main world during the extract phase. `Extract` takes a single type parameter, which is any system parameter (such as `Res`, `Query` etc.). It will extract this from the main world, and returns the result of this extraction when `value` is called on it.

For example, if previously your extract system looked like:
```rust
fn extract_clouds(mut commands: Commands, clouds: Query<Entity, With<Cloud>>) {
    for cloud in clouds.iter() {
        commands.get_or_spawn(cloud).insert(Cloud);
    }
}
```
the new version would be:
```rust
fn extract_clouds(mut commands: Commands, mut clouds: Extract<Query<Entity, With<Cloud>>>) {
    for cloud in clouds.value().iter() {
        commands.get_or_spawn(cloud).insert(Cloud);
    }
}
```
The diff is:
```diff
--- a/src/clouds.rs
+++ b/src/clouds.rs
@@ -1,5 +1,5 @@
-fn extract_clouds(mut commands: Commands, clouds: Query<Entity, With<Cloud>>) {
-    for cloud in clouds.iter() {
+fn extract_clouds(mut commands: Commands, mut clouds: Extract<Query<Entity, With<Cloud>>>) {
+    for cloud in clouds.value().iter() {
         commands.get_or_spawn(cloud).insert(Cloud);
     }
 }
```
You can now also access resources from the render world using the normal system parameters during `Extract`:
```rust
fn extract_assets(mut render_assets: ResMut<MyAssets>, source_assets: Extract<Res<MyAssets>>) {
     *render_assets = source_assets.clone();
}
```
Please note that all existing extract systems need to be updated to match this new style; even if they currently compile they will not run as expected. A warning will be emitted on a best-effort basis if this is not met.

Co-authored-by: Carter Anderson <mcanders1@gmail.com>
2022-07-08 23:56:33 +00:00
Hennadii Chernyshchyk
17e87f116f Improve EntityMap API (#5231)
# Objective

`EntityMap` lacks documentation, don't have `len()` / `is_empty` and `insert` doesn't work as in the regular HashMap`.

## Solution

* Add `len()` method.
* Return previously mapped entity from `insert()` as in the regular `HashMap`.
* Add documentation.

---

## Changelog

* Add `EntityMap::len()`.
* Return previously mapped entity from `EntityMap::insert()` as in the regular `HashMap`.
* Add documentation for `EntityMap` methods.
2022-07-08 01:14:24 +00:00
Obdzen
cf200f09dd Fix typo in Word::get_by_id docs (#5246)
I believe this should read `immutable` not `mutable`



Co-authored-by: Obdzen <108854527+Obdzen@users.noreply.github.com>
2022-07-07 15:25:17 +00:00
Oliver Pauffley
bf1ca81779 remove component and resource suffixes from reflect structs (#5219)
# Objective

Remove suffixes from reflect component and resource methods to closer match bevy norms.

## Solution

removed suffixes and also fixed a spelling error

---
2022-07-06 02:59:51 +00:00
François
f73987ae84 add a more helpful error to help debug panicking command on despawned entity (#5198)
# Objective

- Help users fix issue when their app panic when executing a command on a despawned entity

## Solution

- Add an error code and a page describing how to debug the issue
2022-07-05 18:44:54 +00:00
Thierry Berger
faa40bfc82 Fix markdownlint privileges complaint (#5216)
# Objective

Fixes an annoying error message in CI.

more info at https://github.com/github/super-linter/pull/2464

![image](https://user-images.githubusercontent.com/2290685/177364755-fe607c9c-615e-477c-8e91-d35aae07ab0b.png)
2022-07-05 15:49:11 +00:00
Alice Cecile
2c9bc0b31f Remove dead SystemLabelMarker struct (#5190)
This struct had no internal use, docs, or intuitable external use.

It has been removed.
2022-07-04 15:12:35 +00:00
Jakob Hellermann
d38a8dfdd7 add more SAFETY comments and lint for missing ones in bevy_ecs (#4835)
# Objective

`SAFETY` comments are meant to be placed before `unsafe` blocks and should contain the reasoning of why in this case the usage of unsafe is okay. This is useful when reading the code because it makes it clear which assumptions are required for safety, and makes it easier to spot possible unsoundness holes. It also forces the code writer to think of something to write and maybe look at the safety contracts of any called unsafe methods again to double-check their correct usage.

There's a clippy lint called `undocumented_unsafe_blocks` which warns when using a block without such a comment. 

## Solution

- since clippy expects `SAFETY` instead of `SAFE`, rename those
- add `SAFETY` comments in more places
- for the last remaining 3 places, add an `#[allow()]` and `// TODO` since I wasn't comfortable enough with the code to justify their safety
- add ` #![warn(clippy::undocumented_unsafe_blocks)]` to `bevy_ecs`


### Note for reviewers

The first commit only renames `SAFETY` to `SAFE` so it doesn't need a thorough review.
cb042a416e..55cef2d6fa is the diff for all other changes.

### Safety comments where I'm not too familiar with the code

774012ece5/crates/bevy_ecs/src/entity/mod.rs (L540-L546)

774012ece5/crates/bevy_ecs/src/world/entity_ref.rs (L249-L252)

### Locations left undocumented with a `TODO` comment

5dde944a30/crates/bevy_ecs/src/schedule/executor_parallel.rs (L196-L199)

5dde944a30/crates/bevy_ecs/src/world/entity_ref.rs (L287-L289)

5dde944a30/crates/bevy_ecs/src/world/entity_ref.rs (L413-L415)

Co-authored-by: Jakob Hellermann <hellermann@sipgate.de>
2022-07-04 14:44:24 +00:00
Hennadii Chernyshchyk
534cad611d Add reflection for resources (#5175)
# Objective

We don't have reflection for resources.

## Solution

Introduce reflection for resources.

Continues #3580 (by @Davier), related to #3576.

---

## Changelog

### Added

* Reflection on a resource type (by adding `ReflectResource`):

```rust
#[derive(Reflect)]
#[reflect(Resource)]
struct MyResourse;
```

### Changed

* Rename `ReflectComponent::add_component` into `ReflectComponent::insert_component` for consistency.

## Migration Guide

* Rename `ReflectComponent::add_component` into `ReflectComponent::insert_component`.
2022-07-04 13:04:20 +00:00
Alice Cecile
3a102e7dc2 Add Events to bevy_ecs prelude (#5159)
# Objective

This is a common and useful type. I frequently use this when working with `Events` resource directly, typically when caching the data or manipulating the `World` directly.

This is also useful when manually configuring the cleanup strategy for events.
2022-07-04 13:04:17 +00:00
LoipesMas
de92054bbe Improve Command(s) docs (#4994)
# Objective

- Improve Command(s) docs
- Fixes #4737 

## Solution

- Update and improve documentation.

---
- "list" -> "queue" in `Commands` doc (this better represents reality)
- expand `Command` doc
- update/improve `Commands::add` doc, as specified in linked issue

Let me know if you want any changes!
2022-07-02 09:49:20 +00:00
Boxy
a1a07945d6 fix some memory leaks detected by miri (#4959)
The first leak:
```rust
    #[test]
    fn blob_vec_drop_empty_capacity() {
        let item_layout = Layout:🆕:<Foo>();
        let drop = drop_ptr::<Foo>;
        let _ = unsafe { BlobVec::new(item_layout, Some(drop), 0) };
    }
```
this is because we allocate the swap scratch in blobvec regardless of what the capacity is, but we only deallocate if capacity is > 0

The second leak:
```rust
    #[test]
    fn panic_while_overwriting_component() {
        let helper = DropTestHelper::new();

        let res = panic::catch_unwind(|| {
            let mut world = World::new();
            world
                .spawn()
                .insert(helper.make_component(true, 0))
                .insert(helper.make_component(false, 1));

            println!("Done inserting! Dropping world...");
        });

        let drop_log = helper.finish(res);

        assert_eq!(
            &*drop_log,
            [
                DropLogItem::Create(0),
                DropLogItem::Create(1),
                DropLogItem::Drop(0),
            ]
        );
    }
```
this is caused by us not running the drop impl on the to-be-inserted component if the drop impl of the overwritten component panics

---

managed to figure out where the leaks were by using this 10/10 command
```
cargo --quiet test --lib -- --list | sed 's/: test$//' | MIRIFLAGS="-Zmiri-disable-isolation" xargs -n1 cargo miri test --lib -- --exact
```
which runs every test one by one rather than all at once which let miri actually tell me which test had the leak 🙃
2022-07-01 21:54:28 +00:00
Jakob Hellermann
49ff42cc69 fix new clippy lints (#5160)
# Objective

- Nightly clippy lints should be fixed before they get stable and break CI
  
## Solution

- fix new clippy lints
- ignore `significant_drop_in_scrutinee` since it isn't relevant in our loop https://github.com/rust-lang/rust-clippy/issues/8987
```rust
for line in io::stdin().lines() {
    ...
}
```

Co-authored-by: Jakob Hellermann <hellermann@sipgate.de>
2022-07-01 13:41:23 +00:00
Rob Parrett
5e1756954f Derive default for enums where possible (#5158)
# Objective

Fixes #5153

## Solution

Search for all enums and manually check if they have default impls that can use this new derive.

By my reckoning:

| enum | num |
|-|-|
| total | 159 |
| has default impl | 29 |
| default is unit variant | 23 |
2022-07-01 03:42:15 +00:00
Carter Anderson
96f0ebb9af Fix rust 1.62 changes (#5154)
# Objective

CI is now failing with some changes that landed in 1.62.

## Solution

* Fix an unused lifetime by using it (we double-used the `w` lifetime).
* Update compile_fail error messages
* temporarily disable check-unused-dependencies
2022-06-30 19:24:28 +00:00
harudagondi
b3fa4790b7 Add ability to inspect entity's components (#5136)
# Objective

- Provide a way to see the components of an entity.
- Fixes #1467

## Solution

- Add `World::inspect_entity`. It accepts an `Entity` and returns a vector of `&ComponentInfo` that the entity has.
- Add `EntityCommands::log_components`. It logs the component names of the entity. (info level)

---

## Changelog

### Added
- Ability to inspect components of an entity through `World::inspect_entity` or `EntityCommands::log_components`
2022-06-30 15:23:09 +00:00
Jakob Hellermann
5b5660ea08 remove unnecessary unsafe impl of Send+Sync for ParallelSystemContainer (#5137)
`ParallelSystemContainer` has no `!Send` or `!Sync` fields, so it doesn't need unsafe impls of these traits.
2022-06-29 15:44:33 +00:00
Mike
510ce5e832 fix resource not found error message (#5128)
There are some outdated error messages for when a resource is not found. It references `add_resource` and `add_non_send_resource` which were renamed to `insert_resource` and `insert_non_send_resource`.
2022-06-29 02:29:51 +00:00