Add zerocopy feature that derives zerocopy::AsBytes for Primes<N>.

CHANGELOG.md

@@ -14,6 +14,11 @@ This file contains the changes to the crate since version 0.4.8.
 
 These changes mean that the MSRV of the crate is increased from 1.67.1 to 1.81.0.
 
+### Other changes
+
+- Added the `zerocopy` feature that derives the `AsBytes` trait from the [`zerocopy`](https://crates.io/crates/zerocopy)
+ crate for the `Primes<N>` struct.
+
 ## 0.8.7
 
 - Sped up `is_prime` by checking fewer witnesses in the Miller-Rabin test.

Cargo.toml

@@ -12,6 +12,7 @@ repository = "https://github.com/JSorngard/const-primes/"
 [dependencies]
 serde = { version = "1.0", default-features = false, features = ["derive"], optional = true }
 serde_arrays = { version = "0.1.0", optional = true }
+zerocopy = { version = "0.7", default-features = false, features = ["derive"], optional = true }
 
 [dev-dependencies]
 criterion = { version = "0.5", features = ["html_reports"] }
@@ -22,6 +23,9 @@ rand = { version = "0.8", default-features = false, features = ["small_rng"] }
 # Uses the [`serde_arrays`](https://crates.io/crates/serde_arrays) crate to do this, and that crate uses the standard library.
 serde = ["dep:serde", "dep:serde_arrays"]
 
+# Derives the `AsBytes` trait from the [`zerocopy`](https://crates.io/crates/zerocopy) crate for the `Primes` struct.
+zerocopy = ["dep:zerocopy"]
+
 [package.metadata.docs.rs]
 # Document all features.
 all-features = true

README.md

@@ -122,6 +122,9 @@ for the `Primes` struct, as well as a few others.
 Uses the [`serde_arrays`](https://crates.io/crates/serde_arrays)
 crate to do this, and that crate uses the standard library.
 
+`zerocopy`: derives the `AsBytes` trait from [`zerocopy`](https://crates.io/crates/zerocopy)
+for the `Primes` struct.
+
 ## License
 
 Licensed under either of

src/cache/mod.rs

@@ -45,6 +45,8 @@ use serde::{Deserialize, Serialize};
 /// ```
 #[derive(Debug, Clone, Copy, Eq, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "zerocopy", derive(zerocopy::AsBytes))]
+#[repr(transparent)]
 pub struct Primes<const N: usize>(
     #[cfg_attr(feature = "serde", serde(with = "serde_arrays"))] [Underlying; N],
 );

src/lib.rs

@@ -105,8 +105,10 @@
 //!
 //! # Features
 //!
-//! `serde`: derives the [`Serialize`](serde::Serialize) and [`Deserialize`](serde::Deserialize) traits from [`serde`](https://docs.rs/serde/latest/serde/) for the [`Primes`] struct, as well as a few others.
+//! `serde`: derives the [`Serialize`](serde::Serialize) and [`Deserialize`](serde::Deserialize) traits from [`serde`] for the [`Primes`] struct, as well as a few others.
 //! Uses the [`serde_arrays`](https://docs.rs/serde_arrays/0.1.0) crate to do this, and that crate uses the standard library.
+//! 
+//! `zerocopy`: derives the [`AsBytes`](zerocopy::AsBytes) trait from [`zerocopy`] for the [`Primes`] struct.
 
 #![forbid(unsafe_code)]
 #![no_std]