boost/type_traits/is_stateless.hpp

0001
0002 //  (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000.
0003 //  Use, modification and distribution are subject to the Boost Software License,
0004 //  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
0005 //  http://www.boost.org/LICENSE_1_0.txt).
0006 //
0007 //  See http://www.boost.org/libs/type_traits for most recent version including documentation.
0008
0009 #ifndef BOOST_TT_IS_STATELESS_HPP_INCLUDED
0010 #define BOOST_TT_IS_STATELESS_HPP_INCLUDED
0011
0012 #include <boost/type_traits/has_trivial_constructor.hpp>
0013 #include <boost/type_traits/has_trivial_copy.hpp>
0014 #include <boost/type_traits/has_trivial_destructor.hpp>
0015 #include <boost/type_traits/is_class.hpp>
0016 #include <boost/type_traits/is_empty.hpp>
0017 #include <boost/config.hpp>
0018
0019 namespace boost {
0020
0021 template <typename T>
0022 struct is_stateless
0023  : public integral_constant<bool,
0024       (::boost::has_trivial_constructor<T>::value
0025       && ::boost::has_trivial_copy<T>::value
0026       && ::boost::has_trivial_destructor<T>::value
0027       && ::boost::is_class<T>::value
0028       && ::boost::is_empty<T>::value)>
0029 {};
0030
0031 } // namespace boost
0032
0033 #endif // BOOST_TT_IS_STATELESS_HPP_INCLUDED