Inline namespace test version.

include/boost/type_traits/add_const.hpp

@@ -10,10 +10,12 @@
 #ifndef BOOST_TT_ADD_CONST_HPP_INCLUDED
 #define BOOST_TT_ADD_CONST_HPP_INCLUDED
 
-#include <boost/config.hpp>
+#include <boost/type_traits/detail/config.hpp>
 
 namespace boost {
 
+BOOST_TT_INLINE_NS
+
 // * convert a type T to const type - add_const<T>
 // this is not required since the result is always
 // the same as "T const", but it does suppress warnings
@@ -41,6 +43,7 @@ namespace boost {
       typedef T& type;
    };
 
+BOOST_TT_INLINE_NS_END
 } // namespace boost
 
 #endif // BOOST_TT_ADD_CONST_HPP_INCLUDED

include/boost/type_traits/detail/config.hpp

@@ -12,7 +12,7 @@
 #ifndef BOOST_CONFIG_HPP
 #include <boost/config.hpp>
 #endif
-
+#include <boost/version.hpp>
 #include <boost/detail/workaround.hpp>
 
 //
@@ -67,6 +67,18 @@
 #define BOOST_BROKEN_COMPILER_TYPE_TRAITS_SPECIALIZATION(x)
 #define BOOST_TT_BROKEN_COMPILER_SPEC(x)
 
+#ifdef BOOST_NO_CXX11_INLINE_NAMESPACES
+
+#define BOOST_TT_INLINE_NS
+#define BOOST_TT_INLINE_NS_END
+
+#else
+
+#define BOOST_TT_INLINE_NS  inline namespace BOOST_JOIN(tt, BOOST_VERSION) {
+#define BOOST_TT_INLINE_NS_END }
+
+#endif
+
 #endif // BOOST_TT_CONFIG_HPP_INCLUDED