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/config.hpp> 18 19 namespace boost { 20 21 template <typename T> 22 struct is_stateless 23 : public integral_constant<bool, 24 (::boost::has_trivial_constructor<T>::value 25 && ::boost::has_trivial_copy<T>::value 26 && ::boost::has_trivial_destructor<T>::value 27 && ::boost::is_class<T>::value 28 && ::boost::is_empty<T>::value)> 29 {}; 30 31 } // namespace boost 32 33 #endif // BOOST_TT_IS_STATELESS_HPP_INCLUDED 34