From 064dbedaa53547142f358a769a51d41efc19210d Mon Sep 17 00:00:00 2001
From: Joel de Guzman <djowel@gmail.com>
Date: Tue, 17 Feb 2009 11:18:20 +0000
Subject: [PATCH] #define to allow testing if unused_type has IO

[SVN r51286]
---
 include/boost/fusion/support/unused.hpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/boost/fusion/support/unused.hpp b/include/boost/fusion/support/unused.hpp
index 644f9823..a919e6bf 100644
--- a/include/boost/fusion/support/unused.hpp
+++ b/include/boost/fusion/support/unused.hpp
@@ -13,6 +13,8 @@
 # pragma warning(disable: 4522) // multiple assignment operators specified warning
 #endif
 
+#define BOOST_FUSION_UNUSED_HAS_IO
+
 namespace boost { namespace fusion
 {
     struct unused_type