feat(core): re-export bytemuck::{Zeroable, ZeroableInOption} in r3[_core]::utils

Author: yvt

Cargo.lock

@@ -62,7 +62,7 @@ pub use r3_core::{bag, hunk, kernel, time};
 ///
 /// [1]: r3_core#stability
 pub mod utils {
-    pub use r3_core::utils::{Init, ZeroInit};
+    pub use r3_core::utils::{Init, ZeroInit, Zeroable, ZeroableInOption};
 }
 
 /// The prelude module.

src/r3/src/lib.rs

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+### Added
+
+- `r3_core::utils::{Zeroable,ZeroableInOption}` (re-exported from `bytemuck ^1`)
+
 ## [0.1.4] - 2022-11-16
 
 ### Changed

src/r3_core/CHANGELOG.md

@@ -28,6 +28,7 @@ seq-macro = { version = "0.3.0" }
 svgbobdoc = { version = "0.3.0" }
 tokenlock = { version = "0.3.4", default-features = false }
 arrayvec = { version = "0.7.1", default-features = false }
+bytemuck = { version = "1.12.3", features = ["derive"] }
 bitflags = { version = "1.2.1" }
 macropol = { version = "0.1.2" }
 either = { version = "1.6.1", default-features = false }

src/r3_core/Cargo.toml

@@ -3,7 +3,16 @@
 //! **This module is exempt from [the API stability guarantee][1]** unless
 //! specified otherwise. It's exposed mostly because it's needed by macros.
 //!
+//! # Re-exports
+//!
+//! - [`Zeroable`], [`ZeroableInOption`]: Re-exported from [`bytemuck`]` ^1`.
+//!   `Zeroable` is a marker trait used in [`HunkDefiner::zeroed`][2] and
+//!   suchlike. It can be derived for struct types.
+//!   These re-exports are subject to the application-side API stability
+//!   guarantee.
+//!
 //! [1]: crate#stability
+//! [2]: crate::hunk::HunkDefiner::zeroed
 use core::marker::PhantomData;
 
 /// Conditional type
@@ -71,6 +80,8 @@ pub use init::*;
 pub use rawcell::*;
 pub use zeroinit::*;
 
+pub use bytemuck::{Zeroable, ZeroableInOption};
+
 /// A phantom type that is invariant over `T`.
 pub type PhantomInvariant<T> = core::marker::PhantomData<fn(T) -> T>;