Add feature rkyv that derives the traits from the rkyv crate for …

…`Primes<N>` (#66)

* Add feature `rklyv` that derives the traits from the `rkyv` crate for `Primes`. Removes the impl of the comparison and ordering traits, as all instances of the type are the same.

* cargo fmt

* Add `rkyv` feature docs

* cargo fmt

* Add test of zerocopy::AsBytes impl

CHANGELOG.md

@@ -11,13 +11,21 @@ This file contains the changes to the crate since version 0.4.8.
  from `core`. The crate is thus always `no_std` compatible.
  If the `serde` feature is enabled the crate uses the [`serde_arrays`](https://crates.io/crates/serde_arrays)
  crate to serialize the type, and that crate in turn uses the standard library.
+- Removed the implementations of `PartialEq`, `Eq`, `PartialOrd`, and `Ord` from
+ `Primes`. To perform comparisons of the numbers in the struct with arrays or
+ slices you can call `as_array` or `as_slice`. The reson for the removal is that
+ every instance of `Primes<N>` for a given `N` is the same, which means that
+ comparisons and orderings are pointless, since `N` is part of the type signature.
 
 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.
+- Added the `rkyv` feature that derives the `Serialize`, `Deserialize`, and `Archive`
+ traits from the [`rkyv`](https://crates.io/crates/rkyv) crate for the `Primes<N>`
+ struct.
 
 ## 0.8.7
 

Cargo.toml

@@ -13,19 +13,23 @@ repository = "https://github.com/JSorngard/const-primes/"
 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 }
+rkyv = { version = "0.8.1", default-features = false, optional = true }
 
 [dev-dependencies]
 criterion = { version = "0.5", features = ["html_reports"] }
 rand = { version = "0.8", default-features = false, features = ["small_rng"] }
 
 [features]
-# Derives the `Serialize` and `Deserialize` traits from [`serde`](https://crates.io/crates/serde) for the `Primes` struct, as well as a few others.
+# Derives the `Serialize` and `Deserialize` traits from the [`serde`](https://crates.io/crates/serde) crate 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.
 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"]
 
+# Derives the `Serialize`, `Deserialize`, and `Archive` traits from the [`rkyv`](https://crates.io/crates/rkyv) crate for the `Primes` struct.
+rkyv = ["dep:rkyv"]
+
 [package.metadata.docs.rs]
 # Document all features.
 all-features = true

README.md

@@ -125,6 +125,9 @@ 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.
 
+`rkyv`: derives the `Serialize`, `Deserialize`, and `Archive` traits from the
+[`rkyv`](https://crates.io/crates/rkyv) crate for the [`Primes`] struct.
+
 ## License
 
 Licensed under either of