From 8a4bd8427cb4d4334e649772b2b8fc8857fd0289 Mon Sep 17 00:00:00 2001
From: Colin Sherratt <colin.sherratt@gmail.com>
Date: Sat, 25 Oct 2014 23:38:27 -0400
Subject: [PATCH] Added Encodable and Decodable for Arc<T>.

---
 src/libserialize/serialize.rs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/libserialize/serialize.rs b/src/libserialize/serialize.rs
index 3bed4e4040b3a..0a040fff40d6a 100644
--- a/src/libserialize/serialize.rs
+++ b/src/libserialize/serialize.rs
@@ -17,6 +17,7 @@ Core encoding and decoding interfaces.
 use std::path;
 use std::rc::Rc;
 use std::cell::{Cell, RefCell};
+use std::sync::Arc;
 
 pub trait Encoder<E> {
     // Primitive types:
@@ -556,6 +557,18 @@ impl<E, D: Decoder<E>, T: Decodable<D, E>> Decodable<D, E> for RefCell<T> {
     }
 }
 
+impl<E, S:Encoder<E>, T:Encodable<S, E>+Send+Sync> Encodable<S, E> for Arc<T> {
+    fn encode(&self, s: &mut S) -> Result<(), E> {
+        (**self).encode(s)
+    }
+}
+
+impl<E, D:Decoder<E>,T:Decodable<D, E>+Send+Sync> Decodable<D, E> for Arc<T> {
+    fn decode(d: &mut D) -> Result<Arc<T>, E> {
+        Ok(Arc::new(try!(Decodable::decode(d))))
+    }
+}
+
 // ___________________________________________________________________________
 // Helper routines