...trying out boost with luabind

luabind/luabind/detail/calc_arity.hpp

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+// Copyright (c) 2003 Daniel Wallin and Arvid Norberg
+
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+// ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
+// OR OTHER DEALINGS IN THE SOFTWARE.
+
+#if !BOOST_PP_IS_ITERATING
+
+# include <luabind/detail/signature_match.hpp>
+
+#ifndef LUABIND_CALC_ARITY_HPP_INCLUDED
+#define LUABIND_CALC_ARITY_HPP_INCLUDED
+
+#define LUABIND_FIND_CONV(z,n,text) typedef typename find_conversion_policy<n + 1, Policies>::type p##n;
+#define LUABIND_CALC_ARITY(z,n,text) + BOOST_PP_CAT(p,n)::has_arg
+
+namespace luabind { namespace detail
+{
+	template<int N> struct calc_arity;
+
+	#define BOOST_PP_ITERATION_PARAMS_1 (4, (0, LUABIND_MAX_ARITY, <luabind/detail/calc_arity.hpp>, 1))
+	#include BOOST_PP_ITERATE()
+}}
+
+#undef LUABIND_CALC_ARITY
+#undef LUABIND_FIND_CONV
+
+
+#endif // LUABIND_CALC_ARITY_HPP_INCLUDED
+
+#else // BOOST_PP_ITERATE
+
+	template<>
+	struct calc_arity<BOOST_PP_ITERATION()>
+	{
+		template<BOOST_PP_ENUM_PARAMS(LUABIND_MAX_ARITY, class A), class Policies>
+		static int apply(constructor<BOOST_PP_ENUM_PARAMS(LUABIND_MAX_ARITY, A)>, Policies*)
+		{
+			BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_FIND_CONV, _)
+			return 0 BOOST_PP_REPEAT(BOOST_PP_ITERATION(), LUABIND_CALC_ARITY, _);
+		}
+	};
+
+#endif
+