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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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