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use crate::IntMap;
use serde::{
de::{Deserializer, MapAccess, Visitor},
ser::SerializeMap,
Deserialize, Serialize, Serializer,
};
impl<T: Serialize> Serialize for IntMap<T> {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
let mut map = serializer.serialize_map(Some(self.len()))?;
for (k, v) in self.iter() {
map.serialize_entry(k, v)?;
}
map.end()
}
}
impl<'de, T: Deserialize<'de>> Deserialize<'de> for IntMap<T> {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
deserializer.deserialize_map(IntMapVisitor::new())
}
}
struct IntMapVisitor<V> {
marker: std::marker::PhantomData<fn() -> IntMap<V>>,
}
impl<V> IntMapVisitor<V> {
fn new() -> Self {
IntMapVisitor {
marker: std::marker::PhantomData,
}
}
}
impl<'de, V> Visitor<'de> for IntMapVisitor<V>
where
V: Deserialize<'de>,
{
type Value = IntMap<V>;
fn expecting(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "IntMap<{}>", std::any::type_name::<V>())
}
fn visit_map<M>(self, mut access: M) -> Result<Self::Value, M::Error>
where
M: MapAccess<'de>,
{
let mut map = IntMap::with_capacity(access.size_hint().unwrap_or(0));
while let Some((key, value)) = access.next_entry()? {
map.insert(key, value);
}
Ok(map)
}
}