1 files changed, 60 insertions, 0 deletions
diff --git a/boost/type_erasure/detail/null.hpp b/boost/type_erasure/detail/null.hpp
new file mode 100644
index 0000000000..ef977f4254
--- /dev/null
+++ b/boost/type_erasure/detail/null.hpp
@@ -0,0 +1,60 @@
+// Boost.TypeErasure library
+//
+// Copyright 2012 Steven Watanabe
+//
+// 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)
+//
+// $Id$
+
+#if !defined(BOOST_PP_IS_ITERATING)
+
+#ifndef BOOST_TYPE_ERASURE_DETAIL_NULL_HPP_INCLUDED
+#define BOOST_TYPE_ERASURE_DETAIL_NULL_HPP_INCLUDED
+
+#include <boost/throw_exception.hpp>
+#include <boost/type_traits/remove_pointer.hpp>
+#include <boost/preprocessor/iteration/iterate.hpp>
+#include <boost/preprocessor/repetition/enum_params.hpp>
+#include <boost/preprocessor/repetition/enum_trailing_params.hpp>
+#include <boost/type_erasure/config.hpp>
+#include <boost/type_erasure/exception.hpp>
+
+namespace boost {
+namespace type_erasure {
+namespace detail {
+
+template<class Sig>
+struct null_throw;
+
+template<class Concept>
+struct get_null_vtable_entry {
+    typedef ::boost::type_erasure::detail::null_throw<
+        typename ::boost::remove_pointer<typename Concept::type>::type> type;
+};
+
+#define BOOST_PP_FILENAME_1 <boost/type_erasure/detail/null.hpp>
+#define BOOST_PP_ITERATION_LIMITS (0, BOOST_TYPE_ERASURE_MAX_ARITY)
+#include BOOST_PP_ITERATE()
+
+}
+}
+}
+
+#endif
+
+#else
+
+#define N BOOST_PP_ITERATION()
+
+template<class R BOOST_PP_ENUM_TRAILING_PARAMS(N, class T)>
+struct null_throw<R(BOOST_PP_ENUM_PARAMS(N, T))> {
+    static R value(BOOST_PP_ENUM_PARAMS(N, T)) { 
+        BOOST_THROW_EXCEPTION(::boost::type_erasure::bad_function_call());
+    }
+};
+
+#undef N
+
+#endif