Derive zerocopy traits on Archivedf16 and Archivedbf16 via rkyv passthrough

Requires rkyv 0.8.X (the version that ships rkyv/rkyv#677, the
`rkyv/zerocopy` feature passthrough to `rend/zerocopy-0_8`).

Author: AlJohri

Cargo.toml

@@ -21,6 +21,7 @@ alloc = []
 rand_distr = ["dep:rand", "dep:rand_distr"]
 zerocopy = []                               # Deprecated
 nightly = []
+rkyv = ["dep:rkyv", "rkyv/zerocopy"]
 
 [dependencies]
 cfg-if = "1.0.0"
@@ -61,3 +62,4 @@ harness = false
 [package.metadata.docs.rs]
 rustdoc-args = ["--cfg", "docsrs"]
 all-features = true
+

src/bfloat.rs

@@ -39,7 +39,14 @@ pub(crate) mod convert;
     feature = "rkyv",
     derive(rkyv::Archive, rkyv::Serialize, rkyv::Deserialize)
 )]
-#[cfg_attr(feature = "rkyv", rkyv(resolver = Bf16Resolver))]
+#[cfg_attr(
+    feature = "rkyv",
+    rkyv(
+        resolver = Bf16Resolver,
+        derive(zerocopy::FromBytes, zerocopy::IntoBytes,
+               zerocopy::Immutable, zerocopy::KnownLayout),
+    )
+)]
 #[cfg_attr(feature = "bytemuck", derive(Zeroable, Pod))]
 #[cfg_attr(kani, derive(kani::Arbitrary))]
 #[derive(FromBytes, Immutable, IntoBytes, KnownLayout)]

src/binary16.rs

@@ -38,7 +38,14 @@ pub(crate) mod arch;
     feature = "rkyv",
     derive(rkyv::Archive, rkyv::Serialize, rkyv::Deserialize)
 )]
-#[cfg_attr(feature = "rkyv", rkyv(resolver = F16Resolver))]
+#[cfg_attr(
+    feature = "rkyv",
+    rkyv(
+        resolver = F16Resolver,
+        derive(zerocopy::FromBytes, zerocopy::IntoBytes,
+               zerocopy::Immutable, zerocopy::KnownLayout),
+    )
+)]
 #[cfg_attr(feature = "bytemuck", derive(Zeroable, Pod))]
 #[cfg_attr(kani, derive(kani::Arbitrary))]
 #[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]