// Boost.TypeErasure library
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//
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// Copyright 2012 Steven Watanabe
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//
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// Distributed under the Boost Software License Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// $Id$
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#if !defined(BOOST_PP_IS_ITERATING)
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#ifndef BOOST_TYPE_ERASURE_DETAIL_NULL_HPP_INCLUDED
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#define BOOST_TYPE_ERASURE_DETAIL_NULL_HPP_INCLUDED
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#include <boost/config.hpp>
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#include <boost/throw_exception.hpp>
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#include <boost/type_traits/remove_pointer.hpp>
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#include <boost/preprocessor/iteration/iterate.hpp>
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#include <boost/preprocessor/repetition/enum_params.hpp>
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#include <boost/preprocessor/repetition/enum_trailing_params.hpp>
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#include <boost/type_erasure/config.hpp>
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#include <boost/type_erasure/exception.hpp>
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namespace boost {
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namespace type_erasure {
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namespace detail {
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template<class Sig>
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struct null_throw;
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template<class Concept>
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struct get_null_vtable_entry {
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typedef ::boost::type_erasure::detail::null_throw<
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typename ::boost::remove_pointer<typename Concept::type>::type> type;
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};
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#ifdef BOOST_NO_CXX11_VARIADIC_TEMPLATES
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#define BOOST_PP_FILENAME_1 <boost/type_erasure/detail/null.hpp>
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#define BOOST_PP_ITERATION_LIMITS (0, BOOST_TYPE_ERASURE_MAX_ARITY)
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#include BOOST_PP_ITERATE()
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#else
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template<class R, class... T>
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struct null_throw<R(T...)> {
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static R value(T...) {
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BOOST_THROW_EXCEPTION(::boost::type_erasure::bad_function_call());
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}
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};
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#endif
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}
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}
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}
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#endif
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#else
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#define N BOOST_PP_ITERATION()
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template<class R BOOST_PP_ENUM_TRAILING_PARAMS(N, class T)>
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struct null_throw<R(BOOST_PP_ENUM_PARAMS(N, T))> {
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static R value(BOOST_PP_ENUM_PARAMS(N, T)) {
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BOOST_THROW_EXCEPTION(::boost::type_erasure::bad_function_call());
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}
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};
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#undef N
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#endif
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