add rkyv support

Author: zyansheep

.github/workflows/ci.yaml

@@ -15,6 +15,7 @@ jobs:
         rust: [
           1.31.0, # 2018!
           1.36.0, # rand
+          1.54.0, # rkyv
           stable,
           beta,
           nightly

Cargo.toml

@@ -14,7 +14,7 @@ exclude = ["/bors.toml", "/ci/*", "/.github/*"]
 edition = "2018"
 
 [package.metadata.docs.rs]
-features = ["bytemuck", "std", "serde", "rand"]
+features = ["bytemuck", "std", "serde", "rkyv", "bytecheck", "rand"]
 
 [dependencies]
 
@@ -32,6 +32,15 @@ optional = true
 version = "1.0"
 default-features = false
 
+[dependencies.rkyv]
+optional = true
+version = "0.7"
+default-features = false
+
+[dependencies.bytecheck]
+optional = true
+version = "0.6"
+
 [dependencies.rand]
 optional = true
 version = "0.8"
@@ -41,3 +50,6 @@ default-features = false
 default = ["std"]
 std = ["num-traits/std"]
 libm = ["num-traits/libm"]
+
+[dev-dependencies]
+rkyv = { version = "0.7", default-features = false, features = ["size_64"] }

ci/rustup.sh

@@ -5,6 +5,6 @@
 set -ex
 
 ci=$(dirname $0)
-for version in 1.31.0 1.36.0 stable beta nightly; do
+for version in 1.31.0 1.36.0 1.54.0 stable beta nightly; do
     rustup run "$version" "$ci/test_full.sh"
 done

ci/test_full.sh

@@ -30,6 +30,7 @@ fi
 FEATURES=(libm serde)
 check_version 1.34 && FEATURES+=(bytemuck)
 check_version 1.36 && FEATURES+=(rand)
+check_version 1.54 && FEATURES+=(rkyv)
 echo "Testing supported features: ${FEATURES[*]}"
 
 set -x

src/lib.rs

@@ -79,6 +79,12 @@ pub use crate::crand::ComplexDistribution;
 /// ```
 #[derive(PartialEq, Eq, Copy, Clone, Hash, Debug, Default)]
 #[repr(C)]
+#[cfg_attr(
+    feature = "rkyv",
+    derive(rkyv::Archive, rkyv::Serialize, rkyv::Deserialize,),
+    archive(as = "Complex<T::Archived>", bound(archive = "T: rkyv::Archive"))
+)]
+#[cfg_attr(feature = "bytecheck", derive(bytecheck::CheckBytes))]
 pub struct Complex<T> {
     /// Real portion of the complex number
     pub re: T,