From b6ab4f2485c5e4bc6c18868c4e4c522404f77b20 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Le=CC=81o=20Testard?= <leo.testard@gmail.com>
Date: Mon, 25 Nov 2013 19:35:03 +0100
Subject: [PATCH] Add an implementation of Encodable and Decodable for Rc. This
 will be needed to use Rc in place of @ in libsyntax.

---
 src/libextra/serialize.rs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/libextra/serialize.rs b/src/libextra/serialize.rs
index 8e75be651cf..9b0e00a41e5 100644
--- a/src/libextra/serialize.rs
+++ b/src/libextra/serialize.rs
@@ -20,6 +20,7 @@ Core encoding and decoding interfaces.
 
 use std::at_vec;
 use std::hashmap::{HashMap, HashSet};
+use std::rc::Rc;
 use std::trie::{TrieMap, TrieSet};
 use std::vec;
 use ringbuf::RingBuf;
@@ -405,6 +406,20 @@ impl<S:Encoder,T:Encodable<S>> Encodable<S> for @T {
     }
 }
 
+impl<S:Encoder,T:Encodable<S> + Freeze> Encodable<S> for Rc<T> {
+    #[inline]
+    fn encode(&self, s: &mut S) {
+        self.borrow().encode(s)
+    }
+}
+
+impl<D:Decoder,T:Decodable<D> + Freeze> Decodable<D> for Rc<T> {
+    #[inline]
+    fn decode(d: &mut D) -> Rc<T> {
+        Rc::new(Decodable::decode(d))
+    }
+}
+
 impl<D:Decoder,T:Decodable<D> + 'static> Decodable<D> for @T {
     fn decode(d: &mut D) -> @T {
         @Decodable::decode(d)