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use crate::HashSet;
use core::{
borrow::Borrow,
hash::{BuildHasher, Hash},
};
use rkyv::{
collections::hash_set::{ArchivedHashSet, HashSetResolver},
ser::{ScratchSpace, Serializer},
Archive, Deserialize, Fallible, Serialize,
};
impl<K: Archive + Hash + Eq, S> Archive for HashSet<K, S>
where
K::Archived: Hash + Eq,
{
type Archived = ArchivedHashSet<K::Archived>;
type Resolver = HashSetResolver;
#[inline]
unsafe fn resolve(&self, pos: usize, resolver: Self::Resolver, out: *mut Self::Archived) {
ArchivedHashSet::<K::Archived>::resolve_from_len(self.len(), pos, resolver, out);
}
}
impl<K, S, RS> Serialize<S> for HashSet<K, RS>
where
K::Archived: Hash + Eq,
K: Serialize<S> + Hash + Eq,
S: ScratchSpace + Serializer + ?Sized,
{
#[inline]
fn serialize(&self, serializer: &mut S) -> Result<Self::Resolver, S::Error> {
unsafe { ArchivedHashSet::serialize_from_iter(self.iter(), serializer) }
}
}
impl<K, D, S> Deserialize<HashSet<K, S>, D> for ArchivedHashSet<K::Archived>
where
K: Archive + Hash + Eq,
K::Archived: Deserialize<K, D> + Hash + Eq,
D: Fallible + ?Sized,
S: Default + BuildHasher,
{
#[inline]
fn deserialize(&self, deserializer: &mut D) -> Result<HashSet<K, S>, D::Error> {
let mut result = HashSet::with_hasher(S::default());
for k in self.iter() {
result.insert(k.deserialize(deserializer)?);
}
Ok(result)
}
}
impl<K: Hash + Eq + Borrow<AK>, AK: Hash + Eq, S: BuildHasher> PartialEq<HashSet<K, S>>
for ArchivedHashSet<AK>
{
#[inline]
fn eq(&self, other: &HashSet<K, S>) -> bool {
if self.len() != other.len() {
false
} else {
self.iter().all(|key| other.get(key).is_some())
}
}
}
impl<K: Hash + Eq + Borrow<AK>, AK: Hash + Eq, S: BuildHasher> PartialEq<ArchivedHashSet<AK>>
for HashSet<K, S>
{
#[inline]
fn eq(&self, other: &ArchivedHashSet<AK>) -> bool {
other.eq(self)
}
}
#[cfg(test)]
mod tests {
use crate::HashSet;
use alloc::string::String;
use rkyv::{
archived_root, check_archived_root,
ser::{serializers::AllocSerializer, Serializer},
Deserialize, Infallible,
};
#[test]
fn index_set() {
let mut value = HashSet::new();
value.insert(String::from("foo"));
value.insert(String::from("bar"));
value.insert(String::from("baz"));
value.insert(String::from("bat"));
let mut serializer = AllocSerializer::<4096>::default();
serializer.serialize_value(&value).unwrap();
let result = serializer.into_serializer().into_inner();
let archived = unsafe { archived_root::<HashSet<String>>(result.as_ref()) };
assert_eq!(value.len(), archived.len());
for k in value.iter() {
let ak = archived.get(k.as_str()).unwrap();
assert_eq!(k, ak);
}
let deserialized: HashSet<String> = archived.deserialize(&mut Infallible).unwrap();
assert_eq!(value, deserialized);
}
#[test]
fn validate_index_set() {
let mut value = HashSet::new();
value.insert(String::from("foo"));
value.insert(String::from("bar"));
value.insert(String::from("baz"));
value.insert(String::from("bat"));
let mut serializer = AllocSerializer::<4096>::default();
serializer.serialize_value(&value).unwrap();
let result = serializer.into_serializer().into_inner();
check_archived_root::<HashSet<String>>(result.as_ref())
.expect("failed to validate archived index set");
}
}