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use crate::{ collections::btree_map::{ArchivedBTreeMap, BTreeMapResolver}, ser::Serializer, Archive, Deserialize, Fallible, Serialize, }; #[cfg(all(feature = "alloc", not(feature = "std")))] use alloc::collections::BTreeMap; #[cfg(feature = "std")] use std::collections::BTreeMap; impl<K: Archive + Ord, V: Archive> Archive for BTreeMap<K, V> where K::Archived: Ord, { type Archived = ArchivedBTreeMap<K::Archived, V::Archived>; type Resolver = BTreeMapResolver; #[inline] unsafe fn resolve(&self, pos: usize, resolver: Self::Resolver, out: *mut Self::Archived) { ArchivedBTreeMap::resolve_from_len(self.len(), pos, resolver, out); } } impl<K: Serialize<S> + Ord, V: Serialize<S>, S: Serializer + ?Sized> Serialize<S> for BTreeMap<K, V> where K::Archived: Ord, { #[inline] fn serialize(&self, serializer: &mut S) -> Result<Self::Resolver, S::Error> { unsafe { ArchivedBTreeMap::serialize_from_reverse_iter(self.iter().rev(), serializer) } } } impl<K: Archive + Ord, V: Archive, D: Fallible + ?Sized> Deserialize<BTreeMap<K, V>, D> for ArchivedBTreeMap<K::Archived, V::Archived> where K::Archived: Deserialize<K, D> + Ord, V::Archived: Deserialize<V, D>, { #[inline] fn deserialize(&self, deserializer: &mut D) -> Result<BTreeMap<K, V>, D::Error> { let mut result = BTreeMap::new(); for (key, value) in self.iter() { result.insert( key.deserialize(deserializer)?, value.deserialize(deserializer)?, ); } Ok(result) } } impl<K, V, AK: PartialEq<K>, AV: PartialEq<V>> PartialEq<BTreeMap<K, V>> for ArchivedBTreeMap<AK, AV> { #[inline] fn eq(&self, other: &BTreeMap<K, V>) -> bool { if self.len() != other.len() { false } else { self.iter() .zip(other.iter()) .all(|(a, b)| a.0.eq(b.0) && a.1.eq(b.1)) } } } impl<K, V, AK: PartialEq<K>, AV: PartialEq<V>> PartialEq<ArchivedBTreeMap<AK, AV>> for BTreeMap<K, V> { #[inline] fn eq(&self, other: &ArchivedBTreeMap<AK, AV>) -> bool { other.eq(self) } }