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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 | ||
b32b8144 FG |
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 | ||
7c673cae FG |
38 | } // namespace boost |
39 | ||
40 | #endif // #ifndef BOOST_TYPE_TRAITS_COPY_CV_HPP_INCLUDED |