include/system_error - chromium/llvm-project/libcxx - Git at Google

 // -*- C++ -*-
 //===---------------------------- system_error ----------------------------===//
 //
 // The LLVM Compiler Infrastructure
 //
 // This file is dual licensed under the MIT and the University of Illinois Open
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//

 #ifndef _LIBCPP_SYSTEM_ERROR
 #define _LIBCPP_SYSTEM_ERROR

 /*
  system_error synopsis

 namespace std
 {

 class error_category
 {
 public:
  virtual ~error_category() noexcept;

  constexpr error_category();
  error_category(const error_category&) = delete;
  error_category& operator=(const error_category&) = delete;

  virtual const char* name() const noexcept = 0;
  virtual error_condition default_error_condition(int ev) const noexcept;
  virtual bool equivalent(int code, const error_condition& condition) const noexcept;
  virtual bool equivalent(const error_code& code, int condition) const noexcept;
  virtual string message(int ev) const = 0;

  bool operator==(const error_category& rhs) const noexcept;
  bool operator!=(const error_category& rhs) const noexcept;
  bool operator<(const error_category& rhs) const noexcept;
 };

 const error_category& generic_category() noexcept;
 const error_category& system_category() noexcept;

 template <class T> struct is_error_code_enum
  : public false_type {};

 template <class T> struct is_error_condition_enum
  : public false_type {};

 class error_code
 {
 public:
  // constructors:
  error_code() noexcept;
  error_code(int val, const error_category& cat) noexcept;
  template <class ErrorCodeEnum>
  error_code(ErrorCodeEnum e) noexcept;

  // modifiers:
  void assign(int val, const error_category& cat) noexcept;
  template <class ErrorCodeEnum>
  error_code& operator=(ErrorCodeEnum e) noexcept;
  void clear() noexcept;

  // observers:
  int value() const noexcept;
  const error_category& category() const noexcept;
  error_condition default_error_condition() const noexcept;
  string message() const;
  explicit operator bool() const noexcept;
 };

 // non-member functions:
 bool operator<(const error_code& lhs, const error_code& rhs) noexcept;
 template <class charT, class traits>
  basic_ostream<charT,traits>&
  operator<<(basic_ostream<charT,traits>& os, const error_code& ec);

 class error_condition
 {
 public:
  // constructors:
  error_condition() noexcept;
  error_condition(int val, const error_category& cat) noexcept;
  template <class ErrorConditionEnum>
  error_condition(ErrorConditionEnum e) noexcept;

  // modifiers:
  void assign(int val, const error_category& cat) noexcept;
  template <class ErrorConditionEnum>
  error_condition& operator=(ErrorConditionEnum e) noexcept;
  void clear() noexcept;

  // observers:
  int value() const noexcept;
  const error_category& category() const noexcept;
  string message() const noexcept;
  explicit operator bool() const noexcept;
 };

 bool operator<(const error_condition& lhs, const error_condition& rhs) noexcept;

 class system_error
  : public runtime_error
 {
 public:
  system_error(error_code ec, const string& what_arg);
  system_error(error_code ec, const char* what_arg);
  system_error(error_code ec);
  system_error(int ev, const error_category& ecat, const string& what_arg);
  system_error(int ev, const error_category& ecat, const char* what_arg);
  system_error(int ev, const error_category& ecat);

  const error_code& code() const noexcept;
  const char* what() const noexcept;
 };

 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;

 template <> struct hash<std::error_code>;

 } // std

 */

 #include <__config>
 #include <cerrno>
 #include <type_traits>
 #include <stdexcept>
 #include <__functional_base>

 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #pragma GCC system_header
 #endif

 _LIBCPP_BEGIN_NAMESPACE_STD

 // is_error_code_enum

 template <class _Tp>
 struct _LIBCPP_TYPE_VIS_ONLY is_error_code_enum
  : public false_type {};

 // is_error_condition_enum

 template <class _Tp>
 struct _LIBCPP_TYPE_VIS_ONLY is_error_condition_enum
  : public false_type {};

 // Some error codes are not present on all platforms, so we provide equivalents
 // for them:

 //enum class errc
 _LIBCPP_DECLARE_STRONG_ENUM(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,
 #ifdef ENODATA
  no_message_available = ENODATA,
 #else
  no_message_available = ENOMSG,
 #endif
  no_message = ENOMSG,
  no_protocol_option = ENOPROTOOPT,
  no_space_on_device = ENOSPC,
 #ifdef ENOSR
  no_stream_resources = ENOSR,
 #else
  no_stream_resources = ENOMEM,
 #endif
  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,
 #ifdef ENOSTR
  not_a_stream = ENOSTR,
 #else
  not_a_stream = EINVAL,
 #endif
  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,
 #ifdef ETIME
  stream_timeout = ETIME,
 #else
  stream_timeout = ETIMEDOUT,
 #endif
  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
 };
 _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(errc)

 template <>
 struct _LIBCPP_TYPE_VIS_ONLY is_error_condition_enum<errc>
  : true_type { };

 #ifdef _LIBCPP_HAS_NO_STRONG_ENUMS
 template <>
 struct _LIBCPP_TYPE_VIS_ONLY is_error_condition_enum<errc::__lx>
  : true_type { };
 #endif

 class _LIBCPP_TYPE_VIS error_condition;
 class _LIBCPP_TYPE_VIS error_code;

 // class error_category

 class _LIBCPP_HIDDEN __do_message;

 class _LIBCPP_TYPE_VIS error_category
 {
 public:
  virtual ~error_category() _NOEXCEPT;

 #ifdef _LIBCPP_BUILDING_SYSTEM_ERROR
  error_category() _NOEXCEPT;
 #else
  _LIBCPP_ALWAYS_INLINE
  _LIBCPP_CONSTEXPR_AFTER_CXX11 error_category() _NOEXCEPT _LIBCPP_DEFAULT;
 #endif
 private:
  error_category(const error_category&);// = delete;
  error_category& operator=(const error_category&);// = delete;

 public:
  virtual const char* name() const _NOEXCEPT = 0;
  virtual error_condition default_error_condition(int __ev) const _NOEXCEPT;
  virtual bool equivalent(int __code, const error_condition& __condition) const _NOEXCEPT;
  virtual bool equivalent(const error_code& __code, int __condition) const _NOEXCEPT;
  virtual string message(int __ev) const = 0;

  _LIBCPP_ALWAYS_INLINE
  bool operator==(const error_category& __rhs) const _NOEXCEPT {return this == &__rhs;}

  _LIBCPP_ALWAYS_INLINE
  bool operator!=(const error_category& __rhs) const _NOEXCEPT {return !(*this == __rhs);}

  _LIBCPP_ALWAYS_INLINE
  bool operator< (const error_category& __rhs) const _NOEXCEPT {return this < &__rhs;}

  friend class _LIBCPP_HIDDEN __do_message;
 };

 class _LIBCPP_HIDDEN __do_message
  : public error_category
 {
 public:
  virtual string message(int ev) const;
 };

 _LIBCPP_FUNC_VIS const error_category& generic_category() _NOEXCEPT;
 _LIBCPP_FUNC_VIS const error_category& system_category() _NOEXCEPT;

 class _LIBCPP_TYPE_VIS error_condition
 {
  int __val_;
  const error_category* __cat_;
 public:
  _LIBCPP_ALWAYS_INLINE
  error_condition() _NOEXCEPT : __val_(0), __cat_(&generic_category()) {}

  _LIBCPP_ALWAYS_INLINE
  error_condition(int __val, const error_category& __cat) _NOEXCEPT
  : __val_(__val), __cat_(&__cat) {}

  template <class _Ep>
  _LIBCPP_ALWAYS_INLINE
  error_condition(_Ep __e,
  typename enable_if<is_error_condition_enum<_Ep>::value>::type* = 0
  ) _NOEXCEPT
  {*this = make_error_condition(__e);}

  _LIBCPP_ALWAYS_INLINE
  void assign(int __val, const error_category& __cat) _NOEXCEPT
  {
  __val_ = __val;
  __cat_ = &__cat;
  }

  template <class _Ep>
  _LIBCPP_ALWAYS_INLINE
  typename enable_if
  <
  is_error_condition_enum<_Ep>::value,
  error_condition&
  >::type
  operator=(_Ep __e) _NOEXCEPT
  {*this = make_error_condition(__e); return *this;}

  _LIBCPP_ALWAYS_INLINE
  void clear() _NOEXCEPT
  {
  __val_ = 0;
  __cat_ = &generic_category();
  }

  _LIBCPP_ALWAYS_INLINE
  int value() const _NOEXCEPT {return __val_;}

  _LIBCPP_ALWAYS_INLINE
  const error_category& category() const _NOEXCEPT {return *__cat_;}
  string message() const;

  _LIBCPP_ALWAYS_INLINE
  _LIBCPP_EXPLICIT
  operator bool() const _NOEXCEPT {return __val_ != 0;}
 };

 inline _LIBCPP_INLINE_VISIBILITY
 error_condition
 make_error_condition(errc __e) _NOEXCEPT
 {
  return error_condition(static_cast<int>(__e), generic_category());
 }

 inline _LIBCPP_INLINE_VISIBILITY
 bool
 operator<(const error_condition& __x, const error_condition& __y) _NOEXCEPT
 {
  return __x.category() < __y.category()
  || (__x.category() == __y.category() && __x.value() < __y.value());
 }

 // error_code

 class _LIBCPP_TYPE_VIS error_code
 {
  int __val_;
  const error_category* __cat_;
 public:
  _LIBCPP_ALWAYS_INLINE
  error_code() _NOEXCEPT : __val_(0), __cat_(&system_category()) {}

  _LIBCPP_ALWAYS_INLINE
  error_code(int __val, const error_category& __cat) _NOEXCEPT
  : __val_(__val), __cat_(&__cat) {}

  template <class _Ep>
  _LIBCPP_ALWAYS_INLINE
  error_code(_Ep __e,
  typename enable_if<is_error_code_enum<_Ep>::value>::type* = 0
  ) _NOEXCEPT
  {*this = make_error_code(__e);}

  _LIBCPP_ALWAYS_INLINE
  void assign(int __val, const error_category& __cat) _NOEXCEPT
  {
  __val_ = __val;
  __cat_ = &__cat;
  }

  template <class _Ep>
  _LIBCPP_ALWAYS_INLINE
  typename enable_if
  <
  is_error_code_enum<_Ep>::value,
  error_code&
  >::type
  operator=(_Ep __e) _NOEXCEPT
  {*this = make_error_code(__e); return *this;}

  _LIBCPP_ALWAYS_INLINE
  void clear() _NOEXCEPT
  {
  __val_ = 0;
  __cat_ = &system_category();
  }

  _LIBCPP_ALWAYS_INLINE
  int value() const _NOEXCEPT {return __val_;}

  _LIBCPP_ALWAYS_INLINE
  const error_category& category() const _NOEXCEPT {return *__cat_;}

  _LIBCPP_ALWAYS_INLINE
  error_condition default_error_condition() const _NOEXCEPT
  {return __cat_->default_error_condition(__val_);}

  string message() const;

  _LIBCPP_ALWAYS_INLINE
  _LIBCPP_EXPLICIT
  operator bool() const _NOEXCEPT {return __val_ != 0;}
 };

 inline _LIBCPP_INLINE_VISIBILITY
 error_code
 make_error_code(errc __e) _NOEXCEPT
 {
  return error_code(static_cast<int>(__e), generic_category());
 }

 inline _LIBCPP_INLINE_VISIBILITY
 bool
 operator<(const error_code& __x, const error_code& __y) _NOEXCEPT
 {
  return __x.category() < __y.category()
  || (__x.category() == __y.category() && __x.value() < __y.value());
 }

 inline _LIBCPP_INLINE_VISIBILITY
 bool
 operator==(const error_code& __x, const error_code& __y) _NOEXCEPT
 {
  return __x.category() == __y.category() && __x.value() == __y.value();
 }

 inline _LIBCPP_INLINE_VISIBILITY
 bool
 operator==(const error_code& __x, const error_condition& __y) _NOEXCEPT
 {
  return __x.category().equivalent(__x.value(), __y)
  || __y.category().equivalent(__x, __y.value());
 }

 inline _LIBCPP_INLINE_VISIBILITY
 bool
 operator==(const error_condition& __x, const error_code& __y) _NOEXCEPT
 {
  return __y == __x;
 }

 inline _LIBCPP_INLINE_VISIBILITY
 bool
 operator==(const error_condition& __x, const error_condition& __y) _NOEXCEPT
 {
  return __x.category() == __y.category() && __x.value() == __y.value();
 }

 inline _LIBCPP_INLINE_VISIBILITY
 bool
 operator!=(const error_code& __x, const error_code& __y) _NOEXCEPT
 {return !(__x == __y);}

 inline _LIBCPP_INLINE_VISIBILITY
 bool
 operator!=(const error_code& __x, const error_condition& __y) _NOEXCEPT
 {return !(__x == __y);}

 inline _LIBCPP_INLINE_VISIBILITY
 bool
 operator!=(const error_condition& __x, const error_code& __y) _NOEXCEPT
 {return !(__x == __y);}

 inline _LIBCPP_INLINE_VISIBILITY
 bool
 operator!=(const error_condition& __x, const error_condition& __y) _NOEXCEPT
 {return !(__x == __y);}

 template <>
 struct _LIBCPP_TYPE_VIS_ONLY hash<error_code>
  : public unary_function<error_code, size_t>
 {
  _LIBCPP_INLINE_VISIBILITY
  size_t operator()(const error_code& __ec) const _NOEXCEPT
  {
  return static_cast<size_t>(__ec.value());
  }
 };

 // system_error

 class _LIBCPP_TYPE_VIS system_error
  : public runtime_error
 {
  error_code __ec_;
 public:
  system_error(error_code __ec, const string& __what_arg);
  system_error(error_code __ec, const char* __what_arg);
  system_error(error_code __ec);
  system_error(int __ev, const error_category& __ecat, const string& __what_arg);
  system_error(int __ev, const error_category& __ecat, const char* __what_arg);
  system_error(int __ev, const error_category& __ecat);
  ~system_error() _NOEXCEPT;

  _LIBCPP_ALWAYS_INLINE
  const error_code& code() const _NOEXCEPT {return __ec_;}

 private:
  static string __init(const error_code&, string);
 };

 _LIBCPP_FUNC_VIS void __throw_system_error(int ev, const char* what_arg);

 _LIBCPP_END_NAMESPACE_STD

 #endif // _LIBCPP_SYSTEM_ERROR
	// -- C++ --
	//===---------------------------- system_error ----------------------------===//
	//
	// The LLVM Compiler Infrastructure
	//
	// This file is dual licensed under the MIT and the University of Illinois Open
	// Source Licenses. See LICENSE.TXT for details.
	//
	//===----------------------------------------------------------------------===//

	#ifndef _LIBCPP_SYSTEM_ERROR
	#define _LIBCPP_SYSTEM_ERROR

	/*
	system_error synopsis

	namespace std
	{

	class error_category
	{
	public:
	virtual ~error_category() noexcept;

	constexpr error_category();
	error_category(const error_category&) = delete;
	error_category& operator=(const error_category&) = delete;

	virtual const char* name() const noexcept = 0;
	virtual error_condition default_error_condition(int ev) const noexcept;
	virtual bool equivalent(int code, const error_condition& condition) const noexcept;
	virtual bool equivalent(const error_code& code, int condition) const noexcept;
	virtual string message(int ev) const = 0;

	bool operator==(const error_category& rhs) const noexcept;
	bool operator!=(const error_category& rhs) const noexcept;
	bool operator<(const error_category& rhs) const noexcept;
	};

	const error_category& generic_category() noexcept;
	const error_category& system_category() noexcept;

	template <class T> struct is_error_code_enum
	: public false_type {};

	template <class T> struct is_error_condition_enum
	: public false_type {};

	class error_code
	{
	public:
	// constructors:
	error_code() noexcept;
	error_code(int val, const error_category& cat) noexcept;
	template <class ErrorCodeEnum>
	error_code(ErrorCodeEnum e) noexcept;

	// modifiers:
	void assign(int val, const error_category& cat) noexcept;
	template <class ErrorCodeEnum>
	error_code& operator=(ErrorCodeEnum e) noexcept;
	void clear() noexcept;

	// observers:
	int value() const noexcept;
	const error_category& category() const noexcept;
	error_condition default_error_condition() const noexcept;
	string message() const;
	explicit operator bool() const noexcept;
	};

	// non-member functions:
	bool operator<(const error_code& lhs, const error_code& rhs) noexcept;
	template <class charT, class traits>
	basic_ostream<charT,traits>&
	operator<<(basic_ostream<charT,traits>& os, const error_code& ec);

	class error_condition
	{
	public:
	// constructors:
	error_condition() noexcept;
	error_condition(int val, const error_category& cat) noexcept;
	template <class ErrorConditionEnum>
	error_condition(ErrorConditionEnum e) noexcept;

	// modifiers:
	void assign(int val, const error_category& cat) noexcept;
	template <class ErrorConditionEnum>
	error_condition& operator=(ErrorConditionEnum e) noexcept;
	void clear() noexcept;

	// observers:
	int value() const noexcept;
	const error_category& category() const noexcept;
	string message() const noexcept;
	explicit operator bool() const noexcept;
	};

	bool operator<(const error_condition& lhs, const error_condition& rhs) noexcept;

	class system_error
	: public runtime_error
	{
	public:
	system_error(error_code ec, const string& what_arg);
	system_error(error_code ec, const char* what_arg);
	system_error(error_code ec);
	system_error(int ev, const error_category& ecat, const string& what_arg);
	system_error(int ev, const error_category& ecat, const char* what_arg);
	system_error(int ev, const error_category& ecat);

	const error_code& code() const noexcept;
	const char* what() const noexcept;
	};

	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;

	template <> struct hash<std::error_code>;

	} // std

	*/

	#include <__config>
	#include <cerrno>
	#include <type_traits>
	#include <stdexcept>
	#include <__functional_base>

	#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
	#pragma GCC system_header
	#endif

	_LIBCPP_BEGIN_NAMESPACE_STD

	// is_error_code_enum

	template <class _Tp>
	struct _LIBCPP_TYPE_VIS_ONLY is_error_code_enum
	: public false_type {};

	// is_error_condition_enum

	template <class _Tp>
	struct _LIBCPP_TYPE_VIS_ONLY is_error_condition_enum
	: public false_type {};

	// Some error codes are not present on all platforms, so we provide equivalents
	// for them:

	//enum class errc
	_LIBCPP_DECLARE_STRONG_ENUM(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,
	#ifdef ENODATA
	no_message_available = ENODATA,
	#else
	no_message_available = ENOMSG,
	#endif
	no_message = ENOMSG,
	no_protocol_option = ENOPROTOOPT,
	no_space_on_device = ENOSPC,
	#ifdef ENOSR
	no_stream_resources = ENOSR,
	#else
	no_stream_resources = ENOMEM,
	#endif
	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,
	#ifdef ENOSTR
	not_a_stream = ENOSTR,
	#else
	not_a_stream = EINVAL,
	#endif
	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,
	#ifdef ETIME
	stream_timeout = ETIME,
	#else
	stream_timeout = ETIMEDOUT,
	#endif
	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
	};
	_LIBCPP_DECLARE_STRONG_ENUM_EPILOG(errc)

	template <>
	struct _LIBCPP_TYPE_VIS_ONLY is_error_condition_enum<errc>
	: true_type { };

	#ifdef _LIBCPP_HAS_NO_STRONG_ENUMS
	template <>
	struct _LIBCPP_TYPE_VIS_ONLY is_error_condition_enum<errc::__lx>
	: true_type { };
	#endif

	class _LIBCPP_TYPE_VIS error_condition;
	class _LIBCPP_TYPE_VIS error_code;

	// class error_category

	class _LIBCPP_HIDDEN __do_message;

	class _LIBCPP_TYPE_VIS error_category
	{
	public:
	virtual ~error_category() _NOEXCEPT;

	#ifdef _LIBCPP_BUILDING_SYSTEM_ERROR
	error_category() _NOEXCEPT;
	#else
	_LIBCPP_ALWAYS_INLINE
	_LIBCPP_CONSTEXPR_AFTER_CXX11 error_category() _NOEXCEPT _LIBCPP_DEFAULT;
	#endif
	private:
	error_category(const error_category&);// = delete;
	error_category& operator=(const error_category&);// = delete;

	public:
	virtual const char* name() const _NOEXCEPT = 0;
	virtual error_condition default_error_condition(int __ev) const _NOEXCEPT;
	virtual bool equivalent(int __code, const error_condition& __condition) const _NOEXCEPT;
	virtual bool equivalent(const error_code& __code, int __condition) const _NOEXCEPT;
	virtual string message(int __ev) const = 0;

	_LIBCPP_ALWAYS_INLINE
	bool operator==(const error_category& __rhs) const _NOEXCEPT {return this == &__rhs;}

	_LIBCPP_ALWAYS_INLINE
	bool operator!=(const error_category& __rhs) const _NOEXCEPT {return !(*this == __rhs);}

	_LIBCPP_ALWAYS_INLINE
	bool operator< (const error_category& __rhs) const _NOEXCEPT {return this < &__rhs;}

	friend class _LIBCPP_HIDDEN __do_message;
	};

	class _LIBCPP_HIDDEN __do_message
	: public error_category
	{
	public:
	virtual string message(int ev) const;
	};

	_LIBCPP_FUNC_VIS const error_category& generic_category() _NOEXCEPT;
	_LIBCPP_FUNC_VIS const error_category& system_category() _NOEXCEPT;

	class _LIBCPP_TYPE_VIS error_condition
	{
	int __val_;
	const error_category* __cat_;
	public:
	_LIBCPP_ALWAYS_INLINE
	error_condition() _NOEXCEPT : __val_(0), __cat_(&generic_category()) {}

	_LIBCPP_ALWAYS_INLINE
	error_condition(int __val, const error_category& __cat) _NOEXCEPT
	: __val_(__val), __cat_(&__cat) {}

	template <class _Ep>
	_LIBCPP_ALWAYS_INLINE
	error_condition(_Ep __e,
	typename enable_if<is_error_condition_enum<_Ep>::value>::type* = 0
	) _NOEXCEPT
	{*this = make_error_condition(__e);}

	_LIBCPP_ALWAYS_INLINE
	void assign(int __val, const error_category& __cat) _NOEXCEPT
	{
	__val_ = __val;
	__cat_ = &__cat;
	}

	template <class _Ep>
	_LIBCPP_ALWAYS_INLINE
	typename enable_if
	<
	is_error_condition_enum<_Ep>::value,
	error_condition&
	>::type
	operator=(_Ep __e) _NOEXCEPT
	{this = make_error_condition(__e); return this;}

	_LIBCPP_ALWAYS_INLINE
	void clear() _NOEXCEPT
	{
	__val_ = 0;
	__cat_ = &generic_category();
	}

	_LIBCPP_ALWAYS_INLINE
	int value() const _NOEXCEPT {return __val_;}

	_LIBCPP_ALWAYS_INLINE
	const error_category& category() const _NOEXCEPT {return *__cat_;}
	string message() const;

	_LIBCPP_ALWAYS_INLINE
	_LIBCPP_EXPLICIT
	operator bool() const _NOEXCEPT {return __val_ != 0;}
	};

	inline _LIBCPP_INLINE_VISIBILITY
	error_condition
	make_error_condition(errc __e) _NOEXCEPT
	{
	return error_condition(static_cast<int>(__e), generic_category());
	}

	inline _LIBCPP_INLINE_VISIBILITY
	bool
	operator<(const error_condition& __x, const error_condition& __y) _NOEXCEPT
	{
	return __x.category() < __y.category()
	\|\| (__x.category() == __y.category() && __x.value() < __y.value());
	}

	// error_code

	class _LIBCPP_TYPE_VIS error_code
	{
	int __val_;
	const error_category* __cat_;
	public:
	_LIBCPP_ALWAYS_INLINE
	error_code() _NOEXCEPT : __val_(0), __cat_(&system_category()) {}

	_LIBCPP_ALWAYS_INLINE
	error_code(int __val, const error_category& __cat) _NOEXCEPT
	: __val_(__val), __cat_(&__cat) {}

	template <class _Ep>
	_LIBCPP_ALWAYS_INLINE
	error_code(_Ep __e,
	typename enable_if<is_error_code_enum<_Ep>::value>::type* = 0
	) _NOEXCEPT
	{*this = make_error_code(__e);}

	_LIBCPP_ALWAYS_INLINE
	void assign(int __val, const error_category& __cat) _NOEXCEPT
	{
	__val_ = __val;
	__cat_ = &__cat;
	}

	template <class _Ep>
	_LIBCPP_ALWAYS_INLINE
	typename enable_if
	<
	is_error_code_enum<_Ep>::value,
	error_code&
	>::type
	operator=(_Ep __e) _NOEXCEPT
	{this = make_error_code(__e); return this;}

	_LIBCPP_ALWAYS_INLINE
	void clear() _NOEXCEPT
	{
	__val_ = 0;
	__cat_ = &system_category();
	}

	_LIBCPP_ALWAYS_INLINE
	int value() const _NOEXCEPT {return __val_;}

	_LIBCPP_ALWAYS_INLINE
	const error_category& category() const _NOEXCEPT {return *__cat_;}

	_LIBCPP_ALWAYS_INLINE
	error_condition default_error_condition() const _NOEXCEPT
	{return __cat_->default_error_condition(__val_);}

	string message() const;

	_LIBCPP_ALWAYS_INLINE
	_LIBCPP_EXPLICIT
	operator bool() const _NOEXCEPT {return __val_ != 0;}
	};

	inline _LIBCPP_INLINE_VISIBILITY
	error_code
	make_error_code(errc __e) _NOEXCEPT
	{
	return error_code(static_cast<int>(__e), generic_category());
	}

	inline _LIBCPP_INLINE_VISIBILITY
	bool
	operator<(const error_code& __x, const error_code& __y) _NOEXCEPT
	{
	return __x.category() < __y.category()
	\|\| (__x.category() == __y.category() && __x.value() < __y.value());
	}

	inline _LIBCPP_INLINE_VISIBILITY
	bool
	operator==(const error_code& __x, const error_code& __y) _NOEXCEPT
	{
	return __x.category() == __y.category() && __x.value() == __y.value();
	}

	inline _LIBCPP_INLINE_VISIBILITY
	bool
	operator==(const error_code& __x, const error_condition& __y) _NOEXCEPT
	{
	return __x.category().equivalent(__x.value(), __y)
	\|\| __y.category().equivalent(__x, __y.value());
	}

	inline _LIBCPP_INLINE_VISIBILITY
	bool
	operator==(const error_condition& __x, const error_code& __y) _NOEXCEPT
	{
	return __y == __x;
	}

	inline _LIBCPP_INLINE_VISIBILITY
	bool
	operator==(const error_condition& __x, const error_condition& __y) _NOEXCEPT
	{
	return __x.category() == __y.category() && __x.value() == __y.value();
	}

	inline _LIBCPP_INLINE_VISIBILITY
	bool
	operator!=(const error_code& __x, const error_code& __y) _NOEXCEPT
	{return !(__x == __y);}

	inline _LIBCPP_INLINE_VISIBILITY
	bool
	operator!=(const error_code& __x, const error_condition& __y) _NOEXCEPT
	{return !(__x == __y);}

	inline _LIBCPP_INLINE_VISIBILITY
	bool
	operator!=(const error_condition& __x, const error_code& __y) _NOEXCEPT
	{return !(__x == __y);}

	inline _LIBCPP_INLINE_VISIBILITY
	bool
	operator!=(const error_condition& __x, const error_condition& __y) _NOEXCEPT
	{return !(__x == __y);}

	template <>
	struct _LIBCPP_TYPE_VIS_ONLY hash<error_code>
	: public unary_function<error_code, size_t>
	{
	_LIBCPP_INLINE_VISIBILITY
	size_t operator()(const error_code& __ec) const _NOEXCEPT
	{
	return static_cast<size_t>(__ec.value());
	}
	};

	// system_error

	class _LIBCPP_TYPE_VIS system_error
	: public runtime_error
	{
	error_code __ec_;
	public:
	system_error(error_code __ec, const string& __what_arg);
	system_error(error_code __ec, const char* __what_arg);
	system_error(error_code __ec);
	system_error(int __ev, const error_category& __ecat, const string& __what_arg);
	system_error(int __ev, const error_category& __ecat, const char* __what_arg);
	system_error(int __ev, const error_category& __ecat);
	~system_error() _NOEXCEPT;

	_LIBCPP_ALWAYS_INLINE
	const error_code& code() const _NOEXCEPT {return __ec_;}

	private:
	static string __init(const error_code&, string);
	};

	_LIBCPP_FUNC_VIS void __throw_system_error(int ev, const char* what_arg);

	_LIBCPP_END_NAMESPACE_STD

	#endif // _LIBCPP_SYSTEM_ERROR