| 1 | #ifndef BOOST_TYPE_TRAITS_COPY_CV_HPP_INCLUDED |
|---|---|
| 2 | #define BOOST_TYPE_TRAITS_COPY_CV_HPP_INCLUDED |
| 3 | |
| 4 | // |
| 5 | // Copyright 2015 Peter Dimov |
| 6 | // |
| 7 | // Distributed under the Boost Software License, Version 1.0. |
| 8 | // See accompanying file LICENSE_1_0.txt or copy at |
| 9 | // http://www.boost.org/LICENSE_1_0.txt |
| 10 | // |
| 11 | |
| 12 | #include <boost/type_traits/is_const.hpp> |
| 13 | #include <boost/type_traits/is_volatile.hpp> |
| 14 | #include <boost/type_traits/add_const.hpp> |
| 15 | #include <boost/type_traits/add_volatile.hpp> |
| 16 | #include <boost/type_traits/conditional.hpp> |
| 17 | |
| 18 | namespace boost |
| 19 | { |
| 20 | |
| 21 | template<class T, class U> struct copy_cv |
| 22 | { |
| 23 | private: |
| 24 | |
| 25 | typedef typename boost::conditional<boost::is_const<U>::value, typename boost::add_const<T>::type, T>::type CT; |
| 26 | |
| 27 | public: |
| 28 | |
| 29 | typedef typename boost::conditional<boost::is_volatile<U>::value, typename boost::add_volatile<CT>::type, CT>::type type; |
| 30 | }; |
| 31 | |
| 32 | #if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES) |
| 33 | |
| 34 | template <class T, class U> using copy_cv_t = typename copy_cv<T, U>::type; |
| 35 | |
| 36 | #endif |
| 37 | |
| 38 | } // namespace boost |
| 39 | |
| 40 | #endif // #ifndef BOOST_TYPE_TRAITS_COPY_CV_HPP_INCLUDED |
| 41 |