ceph/src/boost/boost/system/detail/system_category.hpp

   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() BOOST_NOEXCEPT:
  38         error_category( detail::system_category_id )
  39     {
  40     }
  41
  42     const char * name() const BOOST_NOEXCEPT BOOST_OVERRIDE
  43     {
  44         return "system";
  45     }
  46
  47     error_condition default_error_condition( int ev ) const BOOST_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 BOOST_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() BOOST_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() BOOST_NOEXCEPT BOOST_SYMBOL_VISIBLE;
  87 #endif
  88
  89 inline error_category const & system_category() BOOST_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