From f1374a7044d844fb1f89b651bf4c628ac32ed48a Mon Sep 17 00:00:00 2001
From: Erick Tryzelaar <erick.tryzelaar@gmail.com>
Date: Mon, 9 Sep 2013 19:29:31 -0700
Subject: [PATCH] libsyntax: add Default implementation to OptVec

---
 src/libsyntax/opt_vec.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/libsyntax/opt_vec.rs b/src/libsyntax/opt_vec.rs
index 2d7801a22ded..46940d2d4dae 100644
--- a/src/libsyntax/opt_vec.rs
+++ b/src/libsyntax/opt_vec.rs
@@ -140,6 +140,10 @@ impl<A:Eq> Eq for OptVec<A> {
     }
 }
 
+impl<T> Default for OptVec<T> {
+    fn default() -> OptVec<T> { Empty }
+}
+
 pub struct OptVecIterator<'self, T> {
     priv iter: Option<VecIterator<'self, T>>
 }