boost/type_traits/is_stateless.hpp

   1
   2 //  (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000.
   3 //  Use, modification and distribution are subject to the Boost Software License,
   4 //  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   5 //  http://www.boost.org/LICENSE_1_0.txt).
   6 //
   7 //  See http://www.boost.org/libs/type_traits for most recent version including documentation.
   8
   9 #ifndef BOOST_TT_IS_STATELESS_HPP_INCLUDED
  10 #define BOOST_TT_IS_STATELESS_HPP_INCLUDED
  11
  12 #include <boost/type_traits/has_trivial_constructor.hpp>
  13 #include <boost/type_traits/has_trivial_copy.hpp>
  14 #include <boost/type_traits/has_trivial_destructor.hpp>
  15 #include <boost/type_traits/is_class.hpp>
  16 #include <boost/type_traits/is_empty.hpp>
  17 #include <boost/type_traits/detail/ice_and.hpp>
  18 #include <boost/config.hpp>
  19
  20 // should be the last #include
  21 #include <boost/type_traits/detail/bool_trait_def.hpp>
  22
  23 namespace boost {
  24
  25 namespace detail {
  26
  27 template <typename T>
  28 struct is_stateless_impl
  29 {
  30   BOOST_STATIC_CONSTANT(bool, value =
  31     (::boost::type_traits::ice_and<
  32        ::boost::has_trivial_constructor<T>::value,
  33        ::boost::has_trivial_copy<T>::value,
  34        ::boost::has_trivial_destructor<T>::value,
  35        ::boost::is_class<T>::value,
  36        ::boost::is_empty<T>::value
  37      >::value));
  38 };
  39
  40 } // namespace detail
  41
  42 BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_stateless,T,::boost::detail::is_stateless_impl<T>::value)
  43
  44 } // namespace boost
  45
  46 #include <boost/type_traits/detail/bool_trait_undef.hpp>
  47
  48 #endif // BOOST_TT_IS_STATELESS_HPP_INCLUDED