ceph/src/boost/boost/type_erasure/detail/null.hpp

   1 // Boost.TypeErasure library
   2 //
   3 // Copyright 2012 Steven Watanabe
   4 //
   5 // Distributed under the Boost Software License Version 1.0. (See
   6 // accompanying file LICENSE_1_0.txt or copy at
   7 // http://www.boost.org/LICENSE_1_0.txt)
   8 //
   9 // $Id$
  10
  11 #if !defined(BOOST_PP_IS_ITERATING)
  12
  13 #ifndef BOOST_TYPE_ERASURE_DETAIL_NULL_HPP_INCLUDED
  14 #define BOOST_TYPE_ERASURE_DETAIL_NULL_HPP_INCLUDED
  15
  16 #include <boost/throw_exception.hpp>
  17 #include <boost/type_traits/remove_pointer.hpp>
  18 #include <boost/preprocessor/iteration/iterate.hpp>
  19 #include <boost/preprocessor/repetition/enum_params.hpp>
  20 #include <boost/preprocessor/repetition/enum_trailing_params.hpp>
  21 #include <boost/type_erasure/config.hpp>
  22 #include <boost/type_erasure/exception.hpp>
  23
  24 namespace boost {
  25 namespace type_erasure {
  26 namespace detail {
  27
  28 template<class Sig>
  29 struct null_throw;
  30
  31 template<class Concept>
  32 struct get_null_vtable_entry {
  33     typedef ::boost::type_erasure::detail::null_throw<
  34         typename ::boost::remove_pointer<typename Concept::type>::type> type;
  35 };
  36
  37 #define BOOST_PP_FILENAME_1 <boost/type_erasure/detail/null.hpp>
  38 #define BOOST_PP_ITERATION_LIMITS (0, BOOST_TYPE_ERASURE_MAX_ARITY)
  39 #include BOOST_PP_ITERATE()
  40
  41 }
  42 }
  43 }
  44
  45 #endif
  46
  47 #else
  48
  49 #define N BOOST_PP_ITERATION()
  50
  51 template<class R BOOST_PP_ENUM_TRAILING_PARAMS(N, class T)>
  52 struct null_throw<R(BOOST_PP_ENUM_PARAMS(N, T))> {
  53     static R value(BOOST_PP_ENUM_PARAMS(N, T)) {
  54         BOOST_THROW_EXCEPTION(::boost::type_erasure::bad_function_call());
  55     }
  56 };
  57
  58 #undef N
  59
  60 #endif