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use core::fmt;
use core::marker::PhantomData;
use serde::de::{Deserialize, Deserializer, MapAccess, Visitor};
use serde::ser::{Serialize, SerializeMap, Serializer};
use super::{builder::Builder, Slab};
impl<T> Serialize for Slab<T>
where
T: Serialize,
{
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
let mut map_serializer = serializer.serialize_map(Some(self.len()))?;
for (key, value) in self {
map_serializer.serialize_key(&key)?;
map_serializer.serialize_value(value)?;
}
map_serializer.end()
}
}
struct SlabVisitor<T>(PhantomData<T>);
impl<'de, T> Visitor<'de> for SlabVisitor<T>
where
T: Deserialize<'de>,
{
type Value = Slab<T>;
fn expecting(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(fmt, "a map")
}
fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
where
A: MapAccess<'de>,
{
let mut builder = Builder::with_capacity(map.size_hint().unwrap_or(0));
while let Some((key, value)) = map.next_entry()? {
builder.pair(key, value)
}
Ok(builder.build())
}
}
impl<'de, T> Deserialize<'de> for Slab<T>
where
T: Deserialize<'de>,
{
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
deserializer.deserialize_map(SlabVisitor(PhantomData))
}
}
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