1 | #ifndef BOOST_SYSTEM_DETAIL_SYSTEM_CATEGORY_HPP_INCLUDED |
2 | #define BOOST_SYSTEM_DETAIL_SYSTEM_CATEGORY_HPP_INCLUDED |
3 | |
4 | // Copyright Beman Dawes 2006, 2007 |
5 | // Copyright Christoper Kohlhoff 2007 |
6 | // Copyright Peter Dimov 2017, 2018 |
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/system/detail/config.hpp> |
15 | #include <boost/config.hpp> |
16 | |
17 | namespace boost |
18 | { |
19 | |
20 | namespace system |
21 | { |
22 | |
23 | namespace detail |
24 | { |
25 | |
26 | // system_error_category |
27 | |
28 | #if ( defined( BOOST_GCC ) && BOOST_GCC >= 40600 ) || defined( BOOST_CLANG ) |
29 | #pragma GCC diagnostic push |
30 | #pragma GCC diagnostic ignored "-Wnon-virtual-dtor" |
31 | #endif |
32 | |
33 | class BOOST_SYMBOL_VISIBLE system_error_category: public error_category |
34 | { |
35 | public: |
36 | |
37 | BOOST_SYSTEM_CONSTEXPR system_error_category() noexcept: |
38 | error_category( detail::system_category_id ) |
39 | { |
40 | } |
41 | |
42 | const char * name() const noexcept BOOST_OVERRIDE |
43 | { |
44 | return "system" ; |
45 | } |
46 | |
47 | error_condition default_error_condition( int ev ) const noexcept BOOST_OVERRIDE; |
48 | |
49 | std::string message( int ev ) const BOOST_OVERRIDE; |
50 | char const * message( int ev, char * buffer, std::size_t len ) const noexcept BOOST_OVERRIDE; |
51 | }; |
52 | |
53 | #if ( defined( BOOST_GCC ) && BOOST_GCC >= 40600 ) || defined( BOOST_CLANG ) |
54 | #pragma GCC diagnostic pop |
55 | #endif |
56 | |
57 | } // namespace detail |
58 | |
59 | // system_category() |
60 | |
61 | #if defined(BOOST_SYSTEM_HAS_CONSTEXPR) |
62 | |
63 | namespace detail |
64 | { |
65 | |
66 | template<class T> struct BOOST_SYMBOL_VISIBLE system_cat_holder |
67 | { |
68 | static constexpr system_error_category instance{}; |
69 | }; |
70 | |
71 | // Before C++17 it was mandatory to redeclare all static constexpr |
72 | #if defined(BOOST_NO_CXX17_INLINE_VARIABLES) |
73 | template<class T> constexpr system_error_category system_cat_holder<T>::instance; |
74 | #endif |
75 | |
76 | } // namespace detail |
77 | |
78 | constexpr error_category const & system_category() noexcept |
79 | { |
80 | return detail::system_cat_holder<void>::instance; |
81 | } |
82 | |
83 | #else // #if defined(BOOST_SYSTEM_HAS_CONSTEXPR) |
84 | |
85 | #if !defined(__SUNPRO_CC) // trailing __global is not supported |
86 | inline error_category const & system_category() noexcept BOOST_SYMBOL_VISIBLE; |
87 | #endif |
88 | |
89 | inline error_category const & system_category() noexcept |
90 | { |
91 | static const detail::system_error_category instance; |
92 | return instance; |
93 | } |
94 | |
95 | #endif // #if defined(BOOST_SYSTEM_HAS_CONSTEXPR) |
96 | |
97 | // deprecated synonyms |
98 | |
99 | #ifdef BOOST_SYSTEM_ENABLE_DEPRECATED |
100 | |
101 | BOOST_SYSTEM_DEPRECATED("please use system_category()" ) inline const error_category & get_system_category() { return system_category(); } |
102 | BOOST_SYSTEM_DEPRECATED("please use system_category()" ) static const error_category & native_ecat BOOST_ATTRIBUTE_UNUSED = system_category(); |
103 | |
104 | #endif |
105 | |
106 | } // namespace system |
107 | |
108 | } // namespace boost |
109 | |
110 | #endif // #ifndef BOOST_SYSTEM_DETAIL_SYSTEM_CATEGORY_HPP_INCLUDED |
111 | |