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diff --git a/boost/concept/detail/general.hpp b/boost/concept/detail/general.hpp
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+// Copyright David Abrahams 2006. Distributed under 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)
+#ifndef BOOST_CONCEPT_DETAIL_GENERAL_DWA2006429_HPP
+# define BOOST_CONCEPT_DETAIL_GENERAL_DWA2006429_HPP
+
+# include <boost/preprocessor/cat.hpp>
+# include <boost/concept/detail/backward_compatibility.hpp>
+
+# ifdef BOOST_OLD_CONCEPT_SUPPORT
+#  include <boost/concept/detail/has_constraints.hpp>
+#  include <boost/mpl/if.hpp>
+# endif
+
+// This implementation works on Comeau and GCC, all the way back to
+// 2.95
+namespace boost { namespace concepts {
+
+template <class ModelFn>
+struct requirement_;
+
+namespace detail
+{
+  template <void(*)()> struct instantiate {};
+}
+
+template <class Model>
+struct requirement
+{
+    static void failed() { ((Model*)0)->~Model(); }
+};
+
+struct failed {};
+
+template <class Model>
+struct requirement<failed ************ Model::************>
+{
+    static void failed() { ((Model*)0)->~Model(); }
+};
+
+# ifdef BOOST_OLD_CONCEPT_SUPPORT
+
+template <class Model>
+struct constraint
+{
+    static void failed() { ((Model*)0)->constraints(); }
+};
+  
+template <class Model>
+struct requirement_<void(*)(Model)>
+  : mpl::if_<
+        concepts::not_satisfied<Model>
+      , constraint<Model>
+      , requirement<failed ************ Model::************>
+    >::type
+{};
+  
+# else
+
+// For GCC-2.x, these can't have exactly the same name
+template <class Model>
+struct requirement_<void(*)(Model)>
+    : requirement<failed ************ Model::************>
+{};
+  
+# endif
+
+#  define BOOST_CONCEPT_ASSERT_FN( ModelFnPtr )             \
+    typedef ::boost::concepts::detail::instantiate<          \
+    &::boost::concepts::requirement_<ModelFnPtr>::failed>    \
+      BOOST_PP_CAT(boost_concept_check,__LINE__)
+
+}}
+
+#endif // BOOST_CONCEPT_DETAIL_GENERAL_DWA2006429_HPP