c7e28852cb
# Objective
Most of the impls derived for `#[derive(Reflect)]` have one set of type
bounds per field, like so:
```
f32: ::bevy::reflect::FromReflect
+ ::bevy::reflect::TypePath
+ ::bevy::reflect::MaybeTyped
+ ::bevy::reflect::__macro_exports::RegisterForReflection,
```
If multiple fields have the same type, the bounds are repeated
uselessly. This can only hurt compile time and clogs up the `cargo
expand` output.
Avoiding this will help with
https://github.com/bevyengine/bevy/issues/19873.
## Solution
Use a hashset when collecting the bounds to eliminate duplicates.
## Testing
I used cargo expand to confirm the duplicate bounds are no longer
produced.
`-Zmacro-stats` outputs tells me this reduces the size of the `Reflect`
code produced for `bevy_ui` from 1_544_696 bytes to 1_467_967 bytes, a
5% drop.
39 lines
1.1 KiB
TOML
39 lines
1.1 KiB
TOML
[package]
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name = "bevy_reflect_derive"
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version = "0.17.0-dev"
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edition = "2024"
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description = "Derive implementations for bevy_reflect"
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homepage = "https://bevy.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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[lib]
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proc-macro = true
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[features]
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default = []
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# When enabled, allows documentation comments to be processed by the reflection macros
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documentation = []
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# Enables macro logic related to function reflection
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functions = []
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[dependencies]
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bevy_macro_utils = { path = "../../bevy_macro_utils", version = "0.17.0-dev" }
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indexmap = "2.0"
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proc-macro2 = "1.0"
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quote = "1.0"
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syn = { version = "2.0", features = ["full", "extra-traits"] }
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uuid = { version = "1.13.1", features = ["v4"] }
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[target.'cfg(target_arch = "wasm32")'.dependencies]
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# TODO: Assuming all wasm builds are for the browser. Require `no_std` support to break assumption.
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uuid = { version = "1.13.1", default-features = false, features = ["js"] }
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[lints]
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workspace = true
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[package.metadata.docs.rs]
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rustdoc-args = ["-Zunstable-options", "--generate-link-to-definition"]
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all-features = true
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