From e93b2abf37e594110ef15049d957a8dcac9bc977 Mon Sep 17 00:00:00 2001
From: Brian Leibig <brian@brianleibig.com>
Date: Sat, 28 Feb 2015 18:10:41 -0800
Subject: [PATCH] Bison grammar: support parsing default trait impls

---
 src/grammar/parser-lalr.y | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/grammar/parser-lalr.y b/src/grammar/parser-lalr.y
index 6a6f7e0e9f9..9cff58cf89a 100644
--- a/src/grammar/parser-lalr.y
+++ b/src/grammar/parser-lalr.y
@@ -582,6 +582,14 @@ item_impl
 {
   $$ = mk_node("ItemImplNeg", 7, $1, $3, $5, $7, $8, $10, $11);
 }
+| maybe_unsafe IMPL generic_params trait_ref FOR DOTDOT '{' '}'
+{
+  $$ = mk_node("ItemImplDefault", 3, $1, $3, $4);
+}
+| maybe_unsafe IMPL generic_params '!' trait_ref FOR DOTDOT '{' '}'
+{
+  $$ = mk_node("ItemImplDefaultNeg", 3, $1, $3, $4);
+}
 ;
 
 maybe_impl_items