Improve rkyv support

Cargo.toml

@@ -44,7 +44,7 @@ quickcheck = { optional = true, version = "1.0", default-features = false }
 worker = { optional = true, version = "0.0.18" }
 js-sys = { optional = true, version = "0.3" }
 ramhorns = { optional = true, version = "0.14" }
-rkyv = { optional = true, version = "0.7" }
+rkyv = { optional = true, version = "0.7", default-features = false, features = ["validation"] }
 
 [dev-dependencies]
 time = { version = "0.3", features = ["macros", "parsing", "formatting"] }
@@ -53,7 +53,7 @@ chrono = "0.4"
 iso8601 = "0.6"
 ciborium = "0.2"
 serde = { version = "1", features = ["derive"] }
-rkyv = { version = "0.7", features = ["validation"] }
+rkyv = { version = "0.7", default-features = true }
 
 [[bench]]
 name = "timestamp"

src/lib.rs

@@ -836,7 +836,16 @@ pub struct ArchivedTimestamp(pub i64);
 mod rkyv_impl {
     use super::{ArchivedTimestamp, Duration, Timestamp};
 
-    use rkyv::{Archive, Archived, Deserialize, Fallible, Serialize};
+    use rkyv::{Archive, Archived, CheckBytes, Deserialize, Fallible, Serialize};
+
+    impl<C: ?Sized> CheckBytes<C> for ArchivedTimestamp {
+        type Error = <i64 as CheckBytes<C>>::Error;
+
+        #[inline]
+        unsafe fn check_bytes<'a>(value: *const Self, _context: &mut C) -> Result<&'a Self, Self::Error> {
+            Ok(&*value)
+        }
+    }
 
     impl Archive for Timestamp {
         type Archived = ArchivedTimestamp;

tests/rkyv.rs

@@ -20,7 +20,7 @@ fn test_rkyv() {
     let buf = ser.into_serializer().into_inner();
     let archived_value = check_archived_root::<Timestamp>(&buf).unwrap();
 
-    println!("{}", archived_value);
+    println!("{:?}", archived_value);
 
     let de = archived_value.deserialize(&mut Infallible).unwrap();