From 4534f1e5acb1deaf1efccc0f91a8e0c09c163259 Mon Sep 17 00:00:00 2001
From: John Hodge <tpg@mutabah.net>
Date: Sat, 13 Aug 2016 19:39:10 +0800
Subject: Derive PartialEq - Add default arm for enums

---
 src/expand/derive.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'src')

diff --git a/src/expand/derive.cpp b/src/expand/derive.cpp
index 8bd73295..3b20607b 100644
--- a/src/expand/derive.cpp
+++ b/src/expand/derive.cpp
@@ -481,6 +481,15 @@ public:
                 mv$(code)
                 ));
         }
+        
+        // Default arm
+        {
+            arms.push_back(AST::ExprNode_Match_Arm(
+                ::make_vec1( AST::Pattern() ),
+                nullptr,
+                NEWNODE(Block, {}, nullptr)
+                ));
+        }
 
         ::std::vector<AST::ExprNodeP>   vals;
         vals.push_back( NEWNODE(NamedValue, AST::Path("self")) );
-- 
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