123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110 |
- #ifndef BOOST_SYSTEM_DETAIL_SYSTEM_CATEGORY_HPP_INCLUDED
- #define BOOST_SYSTEM_DETAIL_SYSTEM_CATEGORY_HPP_INCLUDED
- // Copyright Beman Dawes 2006, 2007
- // Copyright Christoper Kohlhoff 2007
- // Copyright Peter Dimov 2017, 2018
- //
- // Distributed under the Boost Software License, Version 1.0. (See accompanying
- // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- //
- // See library home page at http://www.boost.org/libs/system
- #include <boost/system/detail/error_category.hpp>
- #include <boost/system/detail/config.hpp>
- #include <boost/config.hpp>
- namespace boost
- {
- namespace system
- {
- namespace detail
- {
- // system_error_category
- #if ( defined( BOOST_GCC ) && BOOST_GCC >= 40600 ) || defined( BOOST_CLANG )
- #pragma GCC diagnostic push
- #pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
- #endif
- class BOOST_SYMBOL_VISIBLE system_error_category: public error_category
- {
- public:
- BOOST_SYSTEM_CONSTEXPR system_error_category() noexcept:
- error_category( detail::system_category_id )
- {
- }
- const char * name() const noexcept BOOST_OVERRIDE
- {
- return "system";
- }
- error_condition default_error_condition( int ev ) const noexcept BOOST_OVERRIDE;
- std::string message( int ev ) const BOOST_OVERRIDE;
- char const * message( int ev, char * buffer, std::size_t len ) const noexcept BOOST_OVERRIDE;
- };
- #if ( defined( BOOST_GCC ) && BOOST_GCC >= 40600 ) || defined( BOOST_CLANG )
- #pragma GCC diagnostic pop
- #endif
- } // namespace detail
- // system_category()
- #if defined(BOOST_SYSTEM_HAS_CONSTEXPR)
- namespace detail
- {
- template<class T> struct BOOST_SYMBOL_VISIBLE system_cat_holder
- {
- static constexpr system_error_category instance{};
- };
- // Before C++17 it was mandatory to redeclare all static constexpr
- #if defined(BOOST_NO_CXX17_INLINE_VARIABLES)
- template<class T> constexpr system_error_category system_cat_holder<T>::instance;
- #endif
- } // namespace detail
- constexpr error_category const & system_category() noexcept
- {
- return detail::system_cat_holder<void>::instance;
- }
- #else // #if defined(BOOST_SYSTEM_HAS_CONSTEXPR)
- #if !defined(__SUNPRO_CC) // trailing __global is not supported
- inline error_category const & system_category() noexcept BOOST_SYMBOL_VISIBLE;
- #endif
- inline error_category const & system_category() noexcept
- {
- static const detail::system_error_category instance;
- return instance;
- }
- #endif // #if defined(BOOST_SYSTEM_HAS_CONSTEXPR)
- // deprecated synonyms
- #ifdef BOOST_SYSTEM_ENABLE_DEPRECATED
- BOOST_SYSTEM_DEPRECATED("please use system_category()") inline const error_category & get_system_category() { return system_category(); }
- BOOST_SYSTEM_DEPRECATED("please use system_category()") static const error_category & native_ecat BOOST_ATTRIBUTE_UNUSED = system_category();
- #endif
- } // namespace system
- } // namespace boost
- #endif // #ifndef BOOST_SYSTEM_DETAIL_SYSTEM_CATEGORY_HPP_INCLUDED
|