From 318958085761d4699d2e19e17a70647902857553 Mon Sep 17 00:00:00 2001
From: Kohei Takahashi <flast@flast.jp>
Date: Wed, 16 Mar 2016 20:25:59 +0900
Subject: [PATCH] Added workaround for GCC 3.4 due to ambiguous.

NOTE: GCC 3.3 and earlier are not supported officially by Boost community.
---
 include/boost/fusion/sequence/convert.hpp | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/include/boost/fusion/sequence/convert.hpp b/include/boost/fusion/sequence/convert.hpp
index b367714c..534d991a 100644
--- a/include/boost/fusion/sequence/convert.hpp
+++ b/include/boost/fusion/sequence/convert.hpp
@@ -8,6 +8,14 @@
 #define FUSION_CONVERT_10022005_1442
 
 #include <boost/fusion/support/config.hpp>
+#if BOOST_WORKAROUND(BOOST_GCC, < 30500)
+#include <boost/core/enable_if.hpp>
+#include <boost/type_traits/is_const.hpp>
+#define BOOST_FUSION_WA_GCC34(type1, type2) \
+    boost::lazy_disable_if<boost::is_const<Sequence>, type1, type2>
+#else
+#define BOOST_FUSION_WA_GCC34(type1, type2) type1, type2
+#endif
 
 namespace boost { namespace fusion
 {
@@ -32,7 +40,7 @@ namespace boost { namespace fusion
 
     template <typename Tag, typename Sequence>
     BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
-    inline typename result_of::convert<Tag, Sequence>::type
+    inline typename BOOST_FUSION_WA_GCC34(result_of::convert<Tag, Sequence>)::type
     convert(Sequence& seq)
     {
         typedef typename result_of::convert<Tag, Sequence>::gen gen;
@@ -49,4 +57,5 @@ namespace boost { namespace fusion
     }
 }}
 
+#undef BOOST_FUSION_WA_GCC34
 #endif