85448b767e
# Objective
Let `bevy_utils` build with no default features.
`cargo build -p bevy_utils --no-default-features` currently fails with
```
error[E0433]: failed to resolve: use of unresolved module or unlinked crate `alloc`
--> crates\bevy_utils\src\debug_info.rs:1:5
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1 | use alloc::{borrow::Cow, fmt, string::String};
| ^^^^^ use of unresolved module or unlinked crate `alloc`
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= help: add `extern crate alloc` to use the `alloc` crate
error[E0432]: unresolved import `alloc`
--> crates\bevy_utils\src\debug_info.rs:1:5
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1 | use alloc::{borrow::Cow, fmt, string::String};
| ^^^^^ help: a similar path exists: `core::alloc`
```
I would have expected CI to catch this earlier, but I have not
investigated why it did not.
## Solution
Wrap the parts of `DebugName` that use `Cow` and `String` in
`cfg::alloc!`.
If the `debug` feature is enabled, then `DebugName` itself stores a
`Cow`, so make the `debug` feature require `bevy_platform/alloc`.
That is, you can use `DebugName` in no-std contexts when it's just a
ZST! (I bet it's even possible to support no-std `debug` by storing
`&'static str` instead of `Cow<'static, str>`, but that seemed like too
much complexity for now.)
41 lines
1.0 KiB
TOML
41 lines
1.0 KiB
TOML
[package]
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name = "bevy_utils"
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version = "0.17.0-dev"
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edition = "2024"
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description = "A collection of utils for Bevy Engine"
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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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[features]
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default = ["parallel"]
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wgpu_wrapper = ["dep:send_wrapper"]
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# Provides access to the `Parallel` type.
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parallel = ["bevy_platform/std", "dep:thread_local"]
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std = ["disqualified/alloc"]
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debug = ["bevy_platform/alloc"]
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[dependencies]
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bevy_platform = { path = "../bevy_platform", version = "0.17.0-dev", default-features = false }
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disqualified = { version = "1.0", default-features = false }
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thread_local = { version = "1.0", optional = true }
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[target.'cfg(all(target_arch = "wasm32", target_feature = "atomics"))'.dependencies]
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send_wrapper = { version = "0.6.0", optional = true }
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[dev-dependencies]
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static_assertions = "1.1.0"
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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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