Switch Sync impl from ArrayParts to ArrayRef

Author: gaumut

src/arraytraits.rs

@@ -433,6 +433,12 @@ where
 {
 }
 
+unsafe impl<A,D> Sync for ArrayRef<A,D>
+where
+    A: Sync,
+{
+}
+
 #[cfg(feature = "serde")]
 #[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
 // Use version number so we can add a packed format later.

src/lib.rs

@@ -1322,8 +1322,6 @@ struct ArrayParts<A, D, T: ?Sized>
     _dst_control: T,
 }
 
-unsafe impl<A, D, T: ?Sized> Sync for ArrayParts<A, D, T> where A: Sync {}
-
 type ArrayPartsSized<A, D> = ArrayParts<A, D, [usize; 0]>;
 type ArrayPartsUnsized<A, D> = ArrayParts<A, D, [usize]>;