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- // 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/config.hpp>
- #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;
- };
- #ifdef BOOST_NO_CXX11_VARIADIC_TEMPLATES
- #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()
- #else
- template<class R, class... T>
- struct null_throw<R(T...)> {
- static R value(T...) {
- BOOST_THROW_EXCEPTION(::boost::type_erasure::bad_function_call());
- }
- };
- #endif
- }
- }
- }
- #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
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