Add serde support for OrderSet

src/serde.rs

@@ -1,8 +1,8 @@
 
 extern crate serde;
 
-use self::serde::ser::{Serialize, Serializer, SerializeMap};
-use self::serde::de::{Deserialize, Deserializer, MapAccess, Visitor};
+use self::serde::ser::{Serialize, Serializer, SerializeMap, SerializeSeq};
+use self::serde::de::{Deserialize, Deserializer, MapAccess, SeqAccess, Visitor};
 
 use std::fmt::{self, Formatter};
 use std::hash::{BuildHasher, Hash};
@@ -65,3 +65,59 @@ impl<'de, K, V, S> Deserialize<'de> for OrderMap<K, V, S>
         deserializer.deserialize_map(OrderMapVisitor(PhantomData))
     }
 }
+
+
+use OrderSet;
+
+/// Requires crate feature `"serde-1"`
+impl<T, S> Serialize for OrderSet<T, S>
+    where T: Serialize + Hash + Eq,
+          S: BuildHasher
+{
+    fn serialize<Se>(&self, serializer: Se) -> Result<Se::Ok, Se::Error>
+        where Se: Serializer
+    {
+        let mut set_serializer = try!(serializer.serialize_seq(Some(self.len())));
+        for value in self {
+            try!(set_serializer.serialize_element(value));
+        }
+        set_serializer.end()
+    }
+}
+
+struct OrderSetVisitor<T, S>(PhantomData<(T, S)>);
+
+impl<'de, T, S> Visitor<'de> for OrderSetVisitor<T, S>
+    where T: Deserialize<'de> + Eq + Hash,
+          S: Default + BuildHasher
+{
+    type Value = OrderSet<T, S>;
+
+    fn expecting(&self, formatter: &mut Formatter) -> fmt::Result {
+        write!(formatter, "a set")
+    }
+
+    fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error>
+        where A: SeqAccess<'de>
+    {
+        let mut values = OrderSet::with_capacity_and_hasher(seq.size_hint().unwrap_or(0), Default::default());
+
+        while let Some(value) = try!(seq.next_element()) {
+            values.insert(value);
+        }
+
+        Ok(values)
+    }
+}
+
+/// Requires crate feature `"serde-1"`
+impl<'de, T, S> Deserialize<'de> for OrderSet<T, S>
+    where T: Deserialize<'de> + Eq + Hash,
+          S: Default + BuildHasher
+{
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+        where D: Deserializer<'de>
+    {
+        deserializer.deserialize_seq(OrderSetVisitor(PhantomData))
+    }
+}