From dba1c428264a75ef8511ab1e6c4c1b3c4d7ef93d Mon Sep 17 00:00:00 2001
From: yhirose <yuji.hirose.bug@gmail.com>
Date: Thu, 30 Jul 2015 18:47:13 -0400
Subject: [PATCH] Fixed a warning message.

---
 example/pl0.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/example/pl0.cc b/example/pl0.cc
index e94ae21..3b7b7ff 100644
--- a/example/pl0.cc
+++ b/example/pl0.cc
@@ -244,6 +244,7 @@ private:
             case "<"_:  return lval < rval;
             case ">="_: return lval >= rval;
             case ">"_:  return lval > rval;
+            default:    throw logic_error("invalid operator");
         }
     }