1 files changed, 125 insertions, 0 deletions
diff --git a/vendor/hashbrown/src/external_trait_impls/rkyv/hash_map.rs b/vendor/hashbrown/src/external_trait_impls/rkyv/hash_map.rs
new file mode 100644
index 000000000..fae7f7676
--- /dev/null
+++ b/vendor/hashbrown/src/external_trait_impls/rkyv/hash_map.rs
@@ -0,0 +1,125 @@
+use crate::HashMap;
+use core::{
+    borrow::Borrow,
+    hash::{BuildHasher, Hash},
+};
+use rkyv::{
+    collections::hash_map::{ArchivedHashMap, HashMapResolver},
+    ser::{ScratchSpace, Serializer},
+    Archive, Deserialize, Fallible, Serialize,
+};
+
+impl<K: Archive + Hash + Eq, V: Archive, S> Archive for HashMap<K, V, S>
+where
+    K::Archived: Hash + Eq,
+{
+    type Archived = ArchivedHashMap<K::Archived, V::Archived>;
+    type Resolver = HashMapResolver;
+
+    #[inline]
+    unsafe fn resolve(&self, pos: usize, resolver: Self::Resolver, out: *mut Self::Archived) {
+        ArchivedHashMap::resolve_from_len(self.len(), pos, resolver, out);
+    }
+}
+
+impl<K, V, S, RandomState> Serialize<S> for HashMap<K, V, RandomState>
+where
+    K: Serialize<S> + Hash + Eq,
+    K::Archived: Hash + Eq,
+    V: Serialize<S>,
+    S: Serializer + ScratchSpace + ?Sized,
+{
+    #[inline]
+    fn serialize(&self, serializer: &mut S) -> Result<Self::Resolver, S::Error> {
+        unsafe { ArchivedHashMap::serialize_from_iter(self.iter(), serializer) }
+    }
+}
+
+impl<K: Archive + Hash + Eq, V: Archive, D: Fallible + ?Sized, S: Default + BuildHasher>
+    Deserialize<HashMap<K, V, S>, D> for ArchivedHashMap<K::Archived, V::Archived>
+where
+    K::Archived: Deserialize<K, D> + Hash + Eq,
+    V::Archived: Deserialize<V, D>,
+{
+    #[inline]
+    fn deserialize(&self, deserializer: &mut D) -> Result<HashMap<K, V, S>, D::Error> {
+        let mut result = HashMap::with_capacity_and_hasher(self.len(), S::default());
+        for (k, v) in self.iter() {
+            result.insert(k.deserialize(deserializer)?, v.deserialize(deserializer)?);
+        }
+        Ok(result)
+    }
+}
+
+impl<K: Hash + Eq + Borrow<AK>, V, AK: Hash + Eq, AV: PartialEq<V>, S: BuildHasher>
+    PartialEq<HashMap<K, V, S>> for ArchivedHashMap<AK, AV>
+{
+    #[inline]
+    fn eq(&self, other: &HashMap<K, V, S>) -> bool {
+        if self.len() != other.len() {
+            false
+        } else {
+            self.iter()
+                .all(|(key, value)| other.get(key).map_or(false, |v| value.eq(v)))
+        }
+    }
+}
+
+impl<K: Hash + Eq + Borrow<AK>, V, AK: Hash + Eq, AV: PartialEq<V>>
+    PartialEq<ArchivedHashMap<AK, AV>> for HashMap<K, V>
+{
+    #[inline]
+    fn eq(&self, other: &ArchivedHashMap<AK, AV>) -> bool {
+        other.eq(self)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::HashMap;
+    use alloc::string::String;
+    use rkyv::{
+        archived_root, check_archived_root,
+        ser::{serializers::AllocSerializer, Serializer},
+        Deserialize, Infallible,
+    };
+
+    #[test]
+    fn index_map() {
+        let mut value = HashMap::new();
+        value.insert(String::from("foo"), 10);
+        value.insert(String::from("bar"), 20);
+        value.insert(String::from("baz"), 40);
+        value.insert(String::from("bat"), 80);
+
+        let mut serializer = AllocSerializer::<4096>::default();
+        serializer.serialize_value(&value).unwrap();
+        let result = serializer.into_serializer().into_inner();
+        let archived = unsafe { archived_root::<HashMap<String, i32>>(result.as_ref()) };
+
+        assert_eq!(value.len(), archived.len());
+        for (k, v) in value.iter() {
+            let (ak, av) = archived.get_key_value(k.as_str()).unwrap();
+            assert_eq!(k, ak);
+            assert_eq!(v, av);
+        }
+
+        let deserialized: HashMap<String, i32> = archived.deserialize(&mut Infallible).unwrap();
+        assert_eq!(value, deserialized);
+    }
+
+    #[test]
+    fn validate_index_map() {
+        let mut value = HashMap::new();
+        value.insert(String::from("foo"), 10);
+        value.insert(String::from("bar"), 20);
+        value.insert(String::from("baz"), 40);
+        value.insert(String::from("bat"), 80);
+
+        let mut serializer = AllocSerializer::<4096>::default();
+        serializer.serialize_value(&value).unwrap();
+        let result = serializer.into_serializer().into_inner();
+        check_archived_root::<HashMap<String, i32>>(result.as_ref())
+            .expect("failed to validate archived index map");
+    }
+}