453c0167b2
10 Commits
| Author | SHA1 | Message | Date | |
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Gino Valente
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397f20e835
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bevy_reflect: Generic parameter info (#15475)
# Objective Currently, reflecting a generic type provides no information about the generic parameters. This means that you can't get access to the type of `T` in `Foo<T>` without creating custom type data (we do this for [`ReflectHandle`](https://docs.rs/bevy/0.14.2/bevy/asset/struct.ReflectHandle.html#method.asset_type_id)). ## Solution This PR makes it so that generic type parameters and generic const parameters are tracked in a `Generics` struct stored on the `TypeInfo` for a type. For example, `struct Foo<T, const N: usize>` will store `T` and `N` as a `TypeParamInfo` and `ConstParamInfo`, respectively. The stored information includes: - The name of the generic parameter (i.e. `T`, `N`, etc.) - The type of the generic parameter (remember that we're dealing with monomorphized types, so this will actually be a concrete type) - The default type/value, if any (e.g. `f32` in `T = f32` or `10` in `const N: usize = 10`) ### Caveats The only requirement for this to work is that the user does not opt-out of the automatic `TypePath` derive with `#[reflect(type_path = false)]`. Doing so prevents the macro code from 100% knowing that the generic type implements `TypePath`. This in turn means the generated `Typed` impl can't add generics to the type. There are two solutions for this—both of which I think we should explore in a future PR: 1. We could just not use `TypePath`. This would mean that we can't store the `Type` of the generic, but we can at least store the `TypeId`. 2. We could provide a way to opt out of the automatic `Typed` derive with a `#[reflect(typed = false)]` attribute. This would allow users to manually implement `Typed` to add whatever generic information they need (e.g. skipping a parameter that can't implement `TypePath` while the rest can). I originally thought about making `Generics` an enum with `Generic`, `NonGeneric`, and `Unavailable` variants to signify whether there are generics, no generics, or generics that cannot be added due to opting out of `TypePath`. I ultimately decided against this as I think it adds a bit too much complexity for such an uncommon problem. Additionally, user's don't necessarily _have_ to know the generics of a type, so just skipping them should generally be fine for now. ## Testing You can test locally by running: ``` cargo test --package bevy_reflect ``` --- ## Showcase You can now access generic parameters via `TypeInfo`! ```rust #[derive(Reflect)] struct MyStruct<T, const N: usize>([T; N]); let generics = MyStruct::<f32, 10>::type_info().generics(); // Get by index: let t = generics.get(0).unwrap(); assert_eq!(t.name(), "T"); assert!(t.ty().is::<f32>()); assert!(!t.is_const()); // Or by name: let n = generics.get_named("N").unwrap(); assert_eq!(n.name(), "N"); assert!(n.ty().is::<usize>()); assert!(n.is_const()); ``` You can even access parameter defaults: ```rust #[derive(Reflect)] struct MyStruct<T = String, const N: usize = 10>([T; N]); let generics = MyStruct::<f32, 5>::type_info().generics(); let GenericInfo::Type(info) = generics.get_named("T").unwrap() else { panic!("expected a type parameter"); }; let default = info.default().unwrap(); assert!(default.is::<String>()); let GenericInfo::Const(info) = generics.get_named("N").unwrap() else { panic!("expected a const parameter"); }; let default = info.default().unwrap(); assert_eq!(default.downcast_ref::<usize>().unwrap(), &10); ``` |
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andriyDev
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04d5685889
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Make drain take a mutable borrow instead of Box<Self> for reflected Map, List, and Set. (#15406)
# Objective Fixes #15185. # Solution Change `drain` to take a `&mut self` for most reflected types. Some notable exceptions to this change are `Array` and `Tuple`. These types don't make sense with `drain` taking a mutable borrow since they can't get "smaller". Also `BTreeMap` doesn't have a `drain` function, so we have to pop elements off one at a time. ## Testing - The existing tests are sufficient. --- ## Migration Guide - `reflect::Map`, `reflect::List`, and `reflect::Set` all now take a `&mut self` instead of a `Box<Self>`. Callers of these traits should add `&mut` before their boxes, and implementers of these traits should update to match. |
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Giacomo Stevanato
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0d751e8809
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Use HashTable in DynamicMap and fix bug in remove (#15158)
# Objective - `DynamicMap` currently uses an `HashMap` from a `u64` hash to the entry index in a `Vec`. This is incorrect in the presence of hash collisions, so let's fix it; - `DynamicMap::remove` was also buggy, as it didn't fix up the indexes of the other elements after removal. Fix that up as well and add a regression test. ## Solution - Use `HashTable` in `DynamicMap` to distinguish entries that have the same hash by using `reflect_partial_eq`, bringing it more in line with what `DynamicSet` does; - Reimplement `DynamicMap::remove` to properly fix up the index of moved elements after the removal. ## Testing - A regression test was added for the `DynamicMap::remove` issue. --- Some kinda related considerations: the use of a separate `Vec` for storing the entries adds some complications that I'm not sure are worth. This is mainly used to implement an efficient `get_at`, which is relied upon by `MapIter`. However both `HashMap` and `BTreeMap` implement `get_at` inefficiently (and cannot do so efficiently), leading to a `O(N^2)` complexity for iterating them. This could be removed in favor of a `Box<dyn Iterator>` like it's done in `DynamicSet`. |
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Zachary Harrold
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d70595b667
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Add core and alloc over std Lints (#15281)
# Objective - Fixes #6370 - Closes #6581 ## Solution - Added the following lints to the workspace: - `std_instead_of_core` - `std_instead_of_alloc` - `alloc_instead_of_core` - Used `cargo +nightly fmt` with [item level use formatting](https://rust-lang.github.io/rustfmt/?version=v1.6.0&search=#Item%5C%3A) to split all `use` statements into single items. - Used `cargo clippy --workspace --all-targets --all-features --fix --allow-dirty` to _attempt_ to resolve the new linting issues, and intervened where the lint was unable to resolve the issue automatically (usually due to needing an `extern crate alloc;` statement in a crate root). - Manually removed certain uses of `std` where negative feature gating prevented `--all-features` from finding the offending uses. - Used `cargo +nightly fmt` with [crate level use formatting](https://rust-lang.github.io/rustfmt/?version=v1.6.0&search=#Crate%5C%3A) to re-merge all `use` statements matching Bevy's previous styling. - Manually fixed cases where the `fmt` tool could not re-merge `use` statements due to conditional compilation attributes. ## Testing - Ran CI locally ## Migration Guide The MSRV is now 1.81. Please update to this version or higher. ## Notes - This is a _massive_ change to try and push through, which is why I've outlined the semi-automatic steps I used to create this PR, in case this fails and someone else tries again in the future. - Making this change has no impact on user code, but does mean Bevy contributors will be warned to use `core` and `alloc` instead of `std` where possible. - This lint is a critical first step towards investigating `no_std` options for Bevy. --------- Co-authored-by: François Mockers <francois.mockers@vleue.com> |
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Clar Fon
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efda7f3f9c
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Simpler lint fixes: makes ci lints work but disables a lint for now (#15376)
Takes the first two commits from #15375 and adds suggestions from this comment: https://github.com/bevyengine/bevy/pull/15375#issuecomment-2366968300 See #15375 for more reasoning/motivation. ## Rebasing (rerunning) ```rust git switch simpler-lint-fixes git reset --hard main cargo fmt --all -- --unstable-features --config normalize_comments=true,imports_granularity=Crate cargo fmt --all git add --update git commit --message "rustfmt" cargo clippy --workspace --all-targets --all-features --fix cargo fmt --all -- --unstable-features --config normalize_comments=true,imports_granularity=Crate cargo fmt --all git add --update git commit --message "clippy" git cherry-pick e6c0b94f6795222310fb812fa5c4512661fc7887 ``` |
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Gino Valente
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4d0961cc8a
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bevy_reflect: Add ReflectRef/ReflectMut/ReflectOwned convenience casting methods (#15235)
# Objective #13320 added convenience methods for casting a `TypeInfo` into its respective variant: ```rust let info: &TypeInfo = <Vec<i32> as Typed>::type_info(); // We know `info` contains a `ListInfo`, so we can simply cast it: let list_info: &ListInfo = info.as_list().unwrap(); ``` This is especially helpful when you have already verified a type is a certain kind via `ReflectRef`, `ReflectMut`, `ReflectOwned`, or `ReflectKind`. As mentioned in that PR, though, it would be useful to add similar convenience methods to those types as well. ## Solution Added convenience casting methods to `ReflectRef`, `ReflectMut`, and `ReflectOwned`. With these methods, I was able to reduce our nesting in certain places throughout the crate. Additionally, I took this opportunity to move these types (and `ReflectKind`) to their own module to help clean up the `reflect` module. ## Testing You can test locally by running: ``` cargo test --package bevy_reflect --all-features ``` --- ## Showcase Convenience methods for casting `ReflectRef`, `ReflectMut`, and `ReflectOwned` into their respective variants has been added! This allows you to write cleaner code if you already know the kind of your reflected data: ```rust // BEFORE let ReflectRef::List(list) = list.reflect_ref() else { panic!("expected list"); }; // AFTER let list = list.reflect_ref().as_list().unwrap(); ``` --------- Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com> Co-authored-by: Pablo Reinhardt <126117294+pablo-lua@users.noreply.github.com> |
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Gino Valente
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3892adcb47
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bevy_reflect: Add Type type (#14838)
# Objective Closes #7622. I was working on adding support for reflecting generic functions and found that I wanted to use an argument's `TypeId` for hashing and comparison, but its `TypePath` for debugging and error messaging. While I could just keep them separate, place them in a tuple or a local struct or something, I think I see an opportunity to make a dedicate type for this. Additionally, we can use this type to clean up some duplication amongst the type info structs in a manner similar to #7622. ## Solution Added the `Type` type. This should be seen as the most basic representation of a type apart from `TypeId`. It stores both the `TypeId` of the type as well as its `TypePathTable`. The `Hash` and `PartialEq` implementations rely on the `TypeId`, while the `Debug` implementation relies on the `TypePath`. This makes it especially useful as a key in a `HashMap` since we get the speed of the `TypeId` hashing/comparisons with the readability of `TypePath`. With this type, we're able to reduce the duplication across the type info structs by removing individual fields for `TypeId` and `TypePathTable`, replacing them with a single `Type` field. Similarly, we can remove many duplicate methods and replace it with a macro that delegates to the stored `Type`. ### Caveats It should be noted that this type is currently 3x larger than `TypeId`. On my machine, it's 48 bytes compared to `TypeId`'s 16. While this doesn't matter for `TypeInfo` since it would contain that data regardless, it is something to keep in mind when using elsewhere. ## Testing All tests should pass as normal: ``` cargo test --package bevy_reflect ``` --- ## Showcase `bevy_reflect` now exports a `Type` struct. This type contains both the `TypeId` and the `TypePathTable` of the given type, allowing it to be used like `TypeId` but have the debuggability of `TypePath`. ```rust // We can create this for any type implementing `TypePath`: let ty = Type::of::<String>(); // It has `Hash` and `Eq` impls powered by `TypeId`, making it useful for maps: let mut map = HashMap::<Type, i32>::new(); map.insert(ty, 25); // And it has a human-readable `Debug` representation: let debug = format!("{:?}", map); assert_eq!(debug, "{alloc::string::String: 25}"); ``` ## Migration Guide Certain type info structs now only return their item types as `Type` instead of exposing direct methods on them. The following methods have been removed: - `ArrayInfo::item_type_path_table` - `ArrayInfo::item_type_id` - `ArrayInfo::item_is` - `ListInfo::item_type_path_table` - `ListInfo::item_type_id` - `ListInfo::item_is` - `SetInfo::value_type_path_table` - `SetInfo::value_type_id` - `SetInfo::value_is` - `MapInfo::key_type_path_table` - `MapInfo::key_type_id` - `MapInfo::key_is` - `MapInfo::value_type_path_table` - `MapInfo::value_type_id` - `MapInfo::value_is` Instead, access the `Type` directly using one of the new methods: - `ArrayInfo::item_ty` - `ListInfo::item_ty` - `SetInfo::value_ty` - `MapInfo::key_ty` - `MapInfo::value_ty` For example: ```rust // BEFORE let type_id = array_info.item_type_id(); // AFTER let type_id = array_info.item_ty().id(); ``` |
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radiish
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6ab8767d3b
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reflect: implement the unique reflect rfc (#7207)
# Objective
- Implements the [Unique Reflect
RFC](https://github.com/nicopap/rfcs/blob/bevy-reflect-api/rfcs/56-better-reflect.md).
## Solution
- Implements the RFC.
- This implementation differs in some ways from the RFC:
- In the RFC, it was suggested `Reflect: Any` but `PartialReflect:
?Any`. During initial implementation I tried this, but we assume the
`PartialReflect: 'static` in a lot of places and the changes required
crept out of the scope of this PR.
- `PartialReflect::try_into_reflect` originally returned `Option<Box<dyn
Reflect>>` but i changed this to `Result<Box<dyn Reflect>, Box<dyn
PartialReflect>>` since the method takes by value and otherwise there
would be no way to recover the type. `as_full` and `as_full_mut` both
still return `Option<&(mut) dyn Reflect>`.
---
## Changelog
- Added `PartialReflect`.
- `Reflect` is now a subtrait of `PartialReflect`.
- Moved most methods on `Reflect` to the new `PartialReflect`.
- Added `PartialReflect::{as_partial_reflect, as_partial_reflect_mut,
into_partial_reflect}`.
- Added `PartialReflect::{try_as_reflect, try_as_reflect_mut,
try_into_reflect}`.
- Added `<dyn PartialReflect>::{try_downcast_ref, try_downcast_mut,
try_downcast, try_take}` supplementing the methods on `dyn Reflect`.
## Migration Guide
- Most instances of `dyn Reflect` should be changed to `dyn
PartialReflect` which is less restrictive, however trait bounds should
generally stay as `T: Reflect`.
- The new `PartialReflect::{as_partial_reflect, as_partial_reflect_mut,
into_partial_reflect, try_as_reflect, try_as_reflect_mut,
try_into_reflect}` methods as well as `Reflect::{as_reflect,
as_reflect_mut, into_reflect}` will need to be implemented for manual
implementors of `Reflect`.
## Future Work
- This PR is designed to be followed up by another "Unique Reflect Phase
2" that addresses the following points:
- Investigate making serialization revolve around `Reflect` instead of
`PartialReflect`.
- [Remove the `try_*` methods on `dyn PartialReflect` since they are
stop
gaps](https://github.com/bevyengine/bevy/pull/7207#discussion_r1083476050).
- Investigate usages like `ReflectComponent`. In the places they
currently use `PartialReflect`, should they be changed to use `Reflect`?
- Merging this opens the door to lots of reflection features we haven't
been able to implement.
- We could re-add [the `Reflectable`
trait](
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Gino Valente
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297c0a3954
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bevy_reflect: Add DynamicSet to dynamic_types example (#14665)
# Objective The `dynamic_types` example was missing a reference to the newly added `DynamicSet` type. ## Solution Add `DynamicSet` to the `dynamic_types` example. For parity with the other dynamic types, I also implemented `FromIterator<T: Reflect>`, `FromIterator<Box<dyn Reflect>>`, and `IntoIterator for &DynamicSet`. ## Testing You can run the example locally: ``` cargo run --example dynamic_types ``` |
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Robert Walter
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52a2a3b146
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Dedicated Reflect implementation for Set-like things (#13014)
# Objective I just wanted to inspect `HashSet`s in `bevy-inspector-egui` but I noticed that it didn't work for some reason. A few minutes later I found myself looking into the bevy reflect impls noticing that `HashSet`s have been covered only rudimentary up until now. ## Solution I'm not sure if this is overkill (especially the first bullet), but here's a list of the changes: - created a whole new trait and enum variants for `ReflectRef` and the like called `Set` - mostly oriented myself at the `Map` trait and made the necessary changes until RA was happy - create macro `impl_reflect_for_hashset!` and call it on `std::HashSet` and `hashbrown::HashSet` Extra notes: - no `get_mut` or `get_mut_at` mirroring the `std::HashSet` - `insert[_boxed]` and `remove` return `bool` mirroring `std::HashSet`, additionally that bool is reflect as I thought that would be how we handle things in bevy reflect, but I'm not sure on this - ser/de are handled via `SeqAccess` - I'm not sure about the general deduplication property of this impl of `Set` that is generally expected? I'm also not sure yet if `Map` does provide this. This mainly refers to the `Dynamic[...]` structs - I'm not sure if there are other methods missing from the `trait`, I felt like `contains` or the set-operations (union/diff/...) could've been helpful, but I wanted to get out the bare minimum for feedback first --- ## Changelog ### Added - `Set` trait for `bevy_reflect` ### Changed - `std::collections::HashSet` and `bevy_utils::hashbrown::HashSet` now implement a more complete set of reflect functionalities instead of "just" `reflect_value` - `TypeInfo` contains a new variant `Set` that contains `SetInfo` - `ReflectKind` contains a new variant `Set` - `ReflectRef` contains a new variant `Set` - `ReflectMut` contains a new variant `Set` - `ReflectOwned` contains a new variant `Set` ## Migration Guide - The new `Set` variants on the enums listed in the change section should probably be considered by people working with this level of the lib ### Help wanted! I'm not sure if this change is able to break code. From my understanding it shouldn't since we just add functionality but I'm not sure yet if theres anything missing from my impl that would be normally provided by `impl_reflect_value!` |