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1 | /* |
2 | * Copyright Andrey Semashev 2007 - 2015. | |
3 | * Distributed under the Boost Software License, Version 1.0. | |
4 | * (See accompanying file LICENSE_1_0.txt or copy at | |
5 | * http://www.boost.org/LICENSE_1_0.txt) | |
6 | */ | |
7 | /*! | |
8 | * \file copy_cv.hpp | |
9 | * \author Andrey Semashev | |
10 | * \date 16.03.2014 | |
11 | * | |
12 | * The header defines \c copy_cv type trait which copies const/volatile qualifiers from one type to another | |
13 | */ | |
14 | ||
15 | #ifndef BOOST_LOG_DETAIL_COPY_CV_HPP_INCLUDED_ | |
16 | #define BOOST_LOG_DETAIL_COPY_CV_HPP_INCLUDED_ | |
17 | ||
18 | #include <boost/log/detail/config.hpp> | |
19 | #include <boost/log/detail/header.hpp> | |
20 | ||
21 | #ifdef BOOST_HAS_PRAGMA_ONCE | |
22 | #pragma once | |
23 | #endif | |
24 | ||
25 | namespace boost { | |
26 | ||
27 | BOOST_LOG_OPEN_NAMESPACE | |
28 | ||
29 | namespace aux { | |
30 | ||
31 | //! The type trait copies top level const/volatile qualifiers from \c FromT to \c ToT | |
32 | template< typename FromT, typename ToT > | |
33 | struct copy_cv | |
34 | { | |
35 | typedef ToT type; | |
36 | }; | |
37 | ||
38 | template< typename FromT, typename ToT > | |
39 | struct copy_cv< const FromT, ToT > | |
40 | { | |
41 | typedef const ToT type; | |
42 | }; | |
43 | ||
44 | template< typename FromT, typename ToT > | |
45 | struct copy_cv< volatile FromT, ToT > | |
46 | { | |
47 | typedef volatile ToT type; | |
48 | }; | |
49 | ||
50 | template< typename FromT, typename ToT > | |
51 | struct copy_cv< const volatile FromT, ToT > | |
52 | { | |
53 | typedef const volatile ToT type; | |
54 | }; | |
55 | ||
56 | } // namespace aux | |
57 | ||
58 | BOOST_LOG_CLOSE_NAMESPACE // namespace log | |
59 | ||
60 | } // namespace boost | |
61 | ||
62 | #include <boost/log/detail/footer.hpp> | |
63 | ||
64 | #endif // BOOST_LOG_DETAIL_COPY_CV_HPP_INCLUDED_ |