#ifndef _LIBCPP___SYSTEM_ERROR_ERROR_CATEGORY_H
#define _LIBCPP___SYSTEM_ERROR_ERROR_CATEGORY_H
#include <__compare/ordering.h>
#include <__config>
#include <string>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
class _LIBCPP_EXPORTED_FROM_ABI error_condition;
class _LIBCPP_EXPORTED_FROM_ABI error_code;
class _LIBCPP_HIDDEN __do_message;
class _LIBCPP_EXPORTED_FROM_ABI error_category { … };
class _LIBCPP_HIDDEN __do_message : public error_category { … };
__attribute__((__const__)) _LIBCPP_EXPORTED_FROM_ABI const error_category& generic_category() _NOEXCEPT;
__attribute__((__const__)) _LIBCPP_EXPORTED_FROM_ABI const error_category& system_category() _NOEXCEPT;
_LIBCPP_END_NAMESPACE_STD
#endif