1 | #ifndef BOOST_SYSTEM_DETAIL_STD_CATEGORY_HPP_INCLUDED |
2 | #define BOOST_SYSTEM_DETAIL_STD_CATEGORY_HPP_INCLUDED |
3 | |
4 | // Support for interoperability between Boost.System and <system_error> |
5 | // |
6 | // Copyright 2018, 2021 Peter Dimov |
7 | // |
8 | // Distributed under the Boost Software License, Version 1.0. (See accompanying |
9 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
10 | // |
11 | // See library home page at http://www.boost.org/libs/system |
12 | |
13 | #include <boost/system/detail/error_category.hpp> |
14 | #include <boost/config.hpp> |
15 | #include <system_error> |
16 | |
17 | // |
18 | |
19 | namespace boost |
20 | { |
21 | |
22 | namespace system |
23 | { |
24 | |
25 | namespace detail |
26 | { |
27 | |
28 | template<unsigned Id> struct id_wrapper {}; |
29 | |
30 | class BOOST_SYMBOL_VISIBLE std_category: public std::error_category |
31 | { |
32 | private: |
33 | |
34 | boost::system::error_category const * pc_; |
35 | |
36 | public: |
37 | |
38 | boost::system::error_category const & original_category() const noexcept |
39 | { |
40 | return *pc_; |
41 | } |
42 | |
43 | public: |
44 | |
45 | template<unsigned Id> |
46 | explicit std_category( boost::system::error_category const * pc, id_wrapper<Id> ): pc_( pc ) |
47 | { |
48 | #if defined(_MSC_VER) && defined(_CPPLIB_VER) && _MSC_VER >= 1900 && _MSC_VER < 2000 |
49 | |
50 | // We used to assign to the protected _Addr member of std::error_category |
51 | // here when Id != 0, but this should never happen now because this code |
52 | // path is no longer used |
53 | |
54 | static_assert( Id == 0, "This constructor should only be called with Id == 0 under MS STL 14.0+" ); |
55 | |
56 | #endif |
57 | } |
58 | |
59 | const char * name() const noexcept BOOST_OVERRIDE |
60 | { |
61 | return pc_->name(); |
62 | } |
63 | |
64 | std::string message( int ev ) const BOOST_OVERRIDE |
65 | { |
66 | return pc_->message( ev ); |
67 | } |
68 | |
69 | std::error_condition default_error_condition( int ev ) const noexcept BOOST_OVERRIDE |
70 | { |
71 | return pc_->default_error_condition( ev ); |
72 | } |
73 | |
74 | inline bool equivalent( int code, const std::error_condition & condition ) const noexcept BOOST_OVERRIDE; |
75 | inline bool equivalent( const std::error_code & code, int condition ) const noexcept BOOST_OVERRIDE; |
76 | }; |
77 | |
78 | } // namespace detail |
79 | |
80 | } // namespace system |
81 | |
82 | } // namespace boost |
83 | |
84 | #endif // #ifndef BOOST_SYSTEM_DETAIL_STD_CATEGORY_HPP_INCLUDED |
85 | |