1#ifndef BOOST_SYSTEM_DETAIL_INTEROP_CATEGORY_HPP_INCLUDED
2#define BOOST_SYSTEM_DETAIL_INTEROP_CATEGORY_HPP_INCLUDED
3
4// Copyright Beman Dawes 2006, 2007
5// Copyright Christoper Kohlhoff 2007
6// Copyright Peter Dimov 2017, 2018, 2021
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/snprintf.hpp>
15#include <boost/system/detail/config.hpp>
16#include <boost/config.hpp>
17
18namespace boost
19{
20
21namespace system
22{
23
24namespace detail
25{
26
27// interop_error_category, used for std::error_code
28
29#if ( defined( BOOST_GCC ) && BOOST_GCC >= 40600 ) || defined( BOOST_CLANG )
30#pragma GCC diagnostic push
31#pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
32#endif
33
34class BOOST_SYMBOL_VISIBLE interop_error_category: public error_category
35{
36public:
37
38 BOOST_SYSTEM_CONSTEXPR interop_error_category() noexcept:
39 error_category( detail::interop_category_id )
40 {
41 }
42
43 const char * name() const noexcept BOOST_OVERRIDE
44 {
45 return "std:unknown";
46 }
47
48 std::string message( int ev ) const BOOST_OVERRIDE;
49 char const * message( int ev, char * buffer, std::size_t len ) const noexcept BOOST_OVERRIDE;
50};
51
52#if ( defined( BOOST_GCC ) && BOOST_GCC >= 40600 ) || defined( BOOST_CLANG )
53#pragma GCC diagnostic pop
54#endif
55
56inline char const * interop_error_category::message( int ev, char * buffer, std::size_t len ) const noexcept
57{
58 detail::snprintf( s: buffer, maxlen: len, format: "Unknown interop error %d", ev );
59 return buffer;
60}
61
62inline std::string interop_error_category::message( int ev ) const
63{
64 char buffer[ 48 ];
65 return message( ev, buffer, len: sizeof( buffer ) );
66}
67
68// interop_category()
69
70#if defined(BOOST_SYSTEM_HAS_CONSTEXPR)
71
72template<class T> struct BOOST_SYMBOL_VISIBLE interop_cat_holder
73{
74 static constexpr interop_error_category instance{};
75};
76
77// Before C++17 it was mandatory to redeclare all static constexpr
78#if defined(BOOST_NO_CXX17_INLINE_VARIABLES)
79template<class T> constexpr interop_error_category interop_cat_holder<T>::instance;
80#endif
81
82constexpr error_category const & interop_category() noexcept
83{
84 return interop_cat_holder<void>::instance;
85}
86
87#else // #if defined(BOOST_SYSTEM_HAS_CONSTEXPR)
88
89#if !defined(__SUNPRO_CC) // trailing __global is not supported
90inline error_category const & interop_category() noexcept BOOST_SYMBOL_VISIBLE;
91#endif
92
93inline error_category const & interop_category() noexcept
94{
95 static const detail::interop_error_category instance;
96 return instance;
97}
98
99#endif // #if defined(BOOST_SYSTEM_HAS_CONSTEXPR)
100
101} // namespace detail
102
103} // namespace system
104
105} // namespace boost
106
107#endif // #ifndef BOOST_SYSTEM_DETAIL_INTEROP_CATEGORY_HPP_INCLUDED
108

source code of boost/libs/system/include/boost/system/detail/interop_category.hpp