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diff --git a/src/third_party/boost-1.56.0/boost/type_traits/is_same.hpp b/src/third_party/boost-1.56.0/boost/type_traits/is_same.hpp
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+++ b/src/third_party/boost-1.56.0/boost/type_traits/is_same.hpp
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+
+//  (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, 
+//      Howard Hinnant and John Maddock 2000. 
+//  (C) Copyright Mat Marcus, Jesse Jones and Adobe Systems Inc 2001
+
+//  Use, modification and distribution are subject to the Boost Software License,
+//  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt).
+//
+//  See http://www.boost.org/libs/type_traits for most recent version including documentation.
+
+//    Fixed is_pointer, is_reference, is_const, is_volatile, is_same, 
+//    is_member_pointer based on the Simulated Partial Specialization work 
+//    of Mat Marcus and Jesse Jones. See  http://opensource.adobe.com or 
+//    http://groups.yahoo.com/group/boost/message/5441 
+//    Some workarounds in here use ideas suggested from "Generic<Programming>: 
+//    Mappings between Types and Values" 
+//    by Andrei Alexandrescu (see http://www.cuj.com/experts/1810/alexandr.html).
+
+
+#ifndef BOOST_TT_IS_SAME_HPP_INCLUDED
+#define BOOST_TT_IS_SAME_HPP_INCLUDED
+
+#include <boost/type_traits/config.hpp>
+// should be the last #include
+#include <boost/type_traits/detail/bool_trait_def.hpp>
+
+namespace boost {
+
+
+BOOST_TT_AUX_BOOL_TRAIT_DEF2(is_same,T,U,false)
+BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_1(typename T,is_same,T,T,true)
+#if BOOST_WORKAROUND(__BORLANDC__, < 0x600)
+// without this, Borland's compiler gives the wrong answer for
+// references to arrays:
+BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_1(typename T,is_same,T&,T&,true)
+#endif
+
+
+} // namespace boost
+
+#include <boost/type_traits/detail/bool_trait_undef.hpp>
+
+#endif  // BOOST_TT_IS_SAME_HPP_INCLUDED
+