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https://github.com/bevyengine/bevy
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c43295af80
# 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.
20 lines
660 B
TOML
20 lines
660 B
TOML
[package]
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name = "bevy_utils"
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version = "0.8.0-dev"
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edition = "2021"
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description = "A collection of utils for Bevy Engine"
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homepage = "https://bevyengine.org"
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repository = "https://github.com/bevyengine/bevy"
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license = "MIT OR Apache-2.0"
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keywords = ["bevy"]
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[dependencies]
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ahash = "0.7.0"
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tracing = { version = "0.1", default-features = false, features = ["std"] }
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instant = { version = "0.1", features = ["wasm-bindgen"] }
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uuid = { version = "1.1", features = ["v4", "serde"] }
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hashbrown = { version = "0.12", features = ["serde"] }
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concat-idents = "1"
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[target.'cfg(target_arch = "wasm32")'.dependencies]
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getrandom = {version = "0.2.0", features = ["js"]}
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