Standard library header <system_error>
From cppreference.com
This header is part of the error handling library.
Classes
| (C++11) |
base class for error categories (class) |
| (C++11) |
identifies the generic error category (function) |
| (C++11) |
identifies the operating system error category (function) |
| (C++11) |
holds a portable error code (class) |
| (C++11) |
the std::error_condition enumeration listing all standard <cerrno> macro constants (class) |
| (C++11) |
holds a platform-dependent error code (class) |
| (C++11) |
exception class used to report conditions that have an error_code (class) |
| (C++11) |
identifies a class as an error_code enumeration (class template) |
| (C++11) |
identifies an enumeration as an std::error_condition (class template) |
| (C++11) |
hash support for std::error_code (class template specialization) |
Functions
compares two error_codes (function) | |
| outputs the value and the category name to an output stream (function) | |
| (C++11) |
constructs an std::errc error code (function) |
| compares error_conditions and error_codes (function) | |
| constructs an std::errc error condition (function) |
Synopsis
namespace std { class error_category; class error_code; class error_condition; class system_error; template <class T> struct is_error_code_enum : public false_type {}; template <class T> struct is_error_condition_enum : public false_type {}; enum class errc { address_family_not_supported, // EAFNOSUPPORT address_in_use, // EADDRINUSE address_not_available, // EADDRNOTAVAIL already_connected, // EISCONN argument_list_too_long, // E2BIG argument_out_of_domain, // EDOM bad_address, // EFAULT bad_file_descriptor, // EBADF bad_message, // EBADMSG broken_pipe, // EPIPE connection_aborted, // ECONNABORTED connection_already_in_progress, // EALREADY connection_refused, // ECONNREFUSED connection_reset, // ECONNRESET cross_device_link, // EXDEV destination_address_required, // EDESTADDRREQ device_or_resource_busy, // EBUSY directory_not_empty, // ENOTEMPTY executable_format_error, // ENOEXEC file_exists, // EEXIST file_too_large, // EFBIG filename_too_long, // ENAMETOOLONG function_not_supported, // ENOSYS host_unreachable, // EHOSTUNREACH identifier_removed, // EIDRM illegal_byte_sequence, // EILSEQ inappropriate_io_control_operation, // ENOTTY interrupted, // EINTR invalid_argument, // EINVAL invalid_seek, // ESPIPE io_error, // EIO is_a_directory, // EISDIR message_size, // EMSGSIZE network_down, // ENETDOWN network_reset, // ENETRESET network_unreachable, // ENETUNREACH no_buffer_space, // ENOBUFS no_child_process, // ECHILD no_link, // ENOLINK no_lock_available, // ENOLCK no_message_available, // ENODATA no_message, // ENOMSG no_protocol_option, // ENOPROTOOPT no_space_on_device, // ENOSPC no_stream_resources, // ENOSR no_such_device_or_address, // ENXIO no_such_device, // ENODEV no_such_file_or_directory, // ENOENT no_such_process, // ESRCH not_a_directory, // ENOTDIR not_a_socket, // ENOTSOCK not_a_stream, // ENOSTR not_connected, // ENOTCONN not_enough_memory, // ENOMEM not_supported, // ENOTSUP operation_canceled, // ECANCELED operation_in_progress, // EINPROGRESS operation_not_permitted, // EPERM operation_not_supported, // EOPNOTSUPP operation_would_block, // EWOULDBLOCK owner_dead, // EOWNERDEAD permission_denied, // EACCES protocol_error, // EPROTO protocol_not_supported, // EPROTONOSUPPORT read_only_file_system, // EROFS resource_deadlock_would_occur, // EDEADLK resource_unavailable_try_again, // EAGAIN result_out_of_range, // ERANGE state_not_recoverable, // ENOTRECOVERABLE stream_timeout, // ETIME text_file_busy, // ETXTBSY timed_out, // ETIMEDOUT too_many_files_open_in_system, // ENFILE too_many_files_open, // EMFILE too_many_links, // EMLINK too_many_symbolic_link_levels, // ELOOP value_too_large, // EOVERFLOW wrong_protocol_type, // EPROTOTYPE }; template <> struct is_error_condition_enum<errc> : true_type { } error_code make_error_code(errc e) noexcept; error_condition make_error_condition(errc e) noexcept; // Comparison operators: bool operator==(const error_code& lhs, const error_code& rhs) noexcept; bool operator==(const error_code& lhs, const error_condition& rhs) noexcept; bool operator==(const error_condition& lhs, const error_code& rhs) noexcept; bool operator==(const error_condition& lhs, const error_condition& rhs) noexcept; bool operator!=(const error_code& lhs, const error_code& rhs) noexcept; bool operator!=(const error_code& lhs, const error_condition& rhs) noexcept; bool operator!=(const error_condition& lhs, const error_code& rhs) noexcept; bool operator!=(const error_condition& lhs, const error_condition& rhs) noexcept; // Hash support template <class T> struct hash; template <> struct hash<error_code>; } // namespace std