1 files changed, 41 insertions, 0 deletions
diff --git a/boost/parameter/aux_/pack/unmatched_argument.hpp b/boost/parameter/aux_/pack/unmatched_argument.hpp
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+++ b/boost/parameter/aux_/pack/unmatched_argument.hpp
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+// Copyright David Abrahams, Daniel Wallin 2003.
+// 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_PARAMETER_AUX_PACK_UNMATCHED_ARGUMENT_HPP
+#define BOOST_PARAMETER_AUX_PACK_UNMATCHED_ARGUMENT_HPP
+
+#include <boost/parameter/config.hpp>
+
+#if defined(BOOST_PARAMETER_CAN_USE_MP11)
+#include <type_traits>
+#else
+#include <boost/mpl/bool.hpp>
+#include <boost/mpl/if.hpp>
+#include <boost/mpl/assert.hpp>
+#include <boost/type_traits/is_same.hpp>
+#endif
+
+namespace boost { namespace parameter { namespace aux {
+
+    template <typename T>
+    struct unmatched_argument
+    {
+#if defined(BOOST_PARAMETER_CAN_USE_MP11)
+        static_assert(::std::is_same<T,void>::value, "T == void");
+#else
+        BOOST_MPL_ASSERT((
+            typename ::boost::mpl::if_<
+                ::boost::is_same<T,void>
+              , ::boost::mpl::true_
+              , ::boost::mpl::false_
+            >::type
+        ));
+#endif
+        typedef int type;
+    }; 
+}}} // namespace boost::parameter::aux
+
+#endif  // include guard
+