Remove libc++ and libc++abi 8.0.0 now that we switched to version 10.0.1

in the gnu/ directory.

1 files changed, 0 insertions, 2637 deletions

diff --git a/lib/libcxx/include/filesystem b/lib/libcxx/include/filesystem
deleted file mode 100644
index af713a06358..00000000000
--- a/lib/libcxx/include/filesystem
+++ /dev/null
@@ -1,2637 +0,0 @@
-// -*- C++ -*-
-//===--------------------------- filesystem -------------------------------===//
-//
-//                     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_FILESYSTEM
-#define _LIBCPP_FILESYSTEM
-/*
-    filesystem synopsis
-
-    namespace std { namespace filesystem {
-
-    class path;
-
-    void swap(path& lhs, path& rhs) noexcept;
-    size_t hash_value(const path& p) noexcept;
-
-    bool operator==(const path& lhs, const path& rhs) noexcept;
-    bool operator!=(const path& lhs, const path& rhs) noexcept;
-    bool operator< (const path& lhs, const path& rhs) noexcept;
-    bool operator<=(const path& lhs, const path& rhs) noexcept;
-    bool operator> (const path& lhs, const path& rhs) noexcept;
-    bool operator>=(const path& lhs, const path& rhs) noexcept;
-
-    path operator/ (const path& lhs, const path& rhs);
-
-    // fs.path.io operators are friends of path.
-    template <class charT, class traits>
-    friend basic_ostream<charT, traits>&
-    operator<<(basic_ostream<charT, traits>& os, const path& p);
-
-    template <class charT, class traits>
-    friend basic_istream<charT, traits>&
-    operator>>(basic_istream<charT, traits>& is, path& p);
-
-    template <class Source>
-      path u8path(const Source& source);
-    template <class InputIterator>
-      path u8path(InputIterator first, InputIterator last);
-
-    class filesystem_error;
-    class directory_entry;
-
-    class directory_iterator;
-
-    // enable directory_iterator range-based for statements
-    directory_iterator begin(directory_iterator iter) noexcept;
-    directory_iterator end(const directory_iterator&) noexcept;
-
-    class recursive_directory_iterator;
-
-    // enable recursive_directory_iterator range-based for statements
-    recursive_directory_iterator begin(recursive_directory_iterator iter) noexcept;
-    recursive_directory_iterator end(const recursive_directory_iterator&) noexcept;
-
-    class file_status;
-
-    struct space_info
-    {
-      uintmax_t capacity;
-      uintmax_t free;
-      uintmax_t available;
-    };
-
-    enum class file_type;
-    enum class perms;
-    enum class perm_options;
-    enum class copy_options;
-    enum class directory_options;
-
-    typedef chrono::time_point<trivial-clock>  file_time_type;
-
-    // operational functions
-
-    path absolute(const path& p);
-    path absolute(const path& p, error_code &ec);
-
-    path canonical(const path& p);
-    path canonical(const path& p, error_code& ec);
-
-    void copy(const path& from, const path& to);
-    void copy(const path& from, const path& to, error_code& ec);
-    void copy(const path& from, const path& to, copy_options options);
-    void copy(const path& from, const path& to, copy_options options,
-                   error_code& ec);
-
-    bool copy_file(const path& from, const path& to);
-    bool copy_file(const path& from, const path& to, error_code& ec);
-    bool copy_file(const path& from, const path& to, copy_options option);
-    bool copy_file(const path& from, const path& to, copy_options option,
-                           error_code& ec);
-
-    void copy_symlink(const path& existing_symlink, const path& new_symlink);
-    void copy_symlink(const path& existing_symlink, const path& new_symlink,
-                              error_code& ec) noexcept;
-
-    bool create_directories(const path& p);
-    bool create_directories(const path& p, error_code& ec);
-
-    bool create_directory(const path& p);
-    bool create_directory(const path& p, error_code& ec) noexcept;
-
-    bool create_directory(const path& p, const path& attributes);
-    bool create_directory(const path& p, const path& attributes,
-                                  error_code& ec) noexcept;
-
-    void create_directory_symlink(const path& to, const path& new_symlink);
-    void create_directory_symlink(const path& to, const path& new_symlink,
-                                          error_code& ec) noexcept;
-
-    void create_hard_link(const path& to, const path& new_hard_link);
-    void create_hard_link(const path& to, const path& new_hard_link,
-                                  error_code& ec) noexcept;
-
-    void create_symlink(const path& to, const path& new_symlink);
-    void create_symlink(const path& to, const path& new_symlink,
-                                error_code& ec) noexcept;
-
-    path current_path();
-    path current_path(error_code& ec);
-    void current_path(const path& p);
-    void current_path(const path& p, error_code& ec) noexcept;
-
-    bool exists(file_status s) noexcept;
-    bool exists(const path& p);
-    bool exists(const path& p, error_code& ec) noexcept;
-
-    bool equivalent(const path& p1, const path& p2);
-    bool equivalent(const path& p1, const path& p2, error_code& ec) noexcept;
-
-    uintmax_t    file_size(const path& p);
-    uintmax_t    file_size(const path& p, error_code& ec) noexcept;
-
-    uintmax_t    hard_link_count(const path& p);
-    uintmax_t    hard_link_count(const path& p, error_code& ec) noexcept;
-
-    bool is_block_file(file_status s) noexcept;
-    bool is_block_file(const path& p);
-    bool is_block_file(const path& p, error_code& ec) noexcept;
-
-    bool is_character_file(file_status s) noexcept;
-    bool is_character_file(const path& p);
-    bool is_character_file(const path& p, error_code& ec) noexcept;
-
-    bool is_directory(file_status s) noexcept;
-    bool is_directory(const path& p);
-    bool is_directory(const path& p, error_code& ec) noexcept;
-
-    bool is_empty(const path& p);
-    bool is_empty(const path& p, error_code& ec) noexcept;
-
-    bool is_fifo(file_status s) noexcept;
-    bool is_fifo(const path& p);
-    bool is_fifo(const path& p, error_code& ec) noexcept;
-
-    bool is_other(file_status s) noexcept;
-    bool is_other(const path& p);
-    bool is_other(const path& p, error_code& ec) noexcept;
-
-    bool is_regular_file(file_status s) noexcept;
-    bool is_regular_file(const path& p);
-    bool is_regular_file(const path& p, error_code& ec) noexcept;
-
-    bool is_socket(file_status s) noexcept;
-    bool is_socket(const path& p);
-    bool is_socket(const path& p, error_code& ec) noexcept;
-
-    bool is_symlink(file_status s) noexcept;
-    bool is_symlink(const path& p);
-    bool is_symlink(const path& p, error_code& ec) noexcept;
-
-    file_time_type  last_write_time(const path& p);
-    file_time_type  last_write_time(const path& p, error_code& ec) noexcept;
-    void last_write_time(const path& p, file_time_type new_time);
-    void last_write_time(const path& p, file_time_type new_time,
-                                 error_code& ec) noexcept;
-
-    void permissions(const path& p, perms prms,
-                     perm_options opts=perm_options::replace);
-    void permissions(const path& p, perms prms, error_code& ec) noexcept;
-    void permissions(const path& p, perms prms, perm_options opts,
-                     error_code& ec);
-
-    path proximate(const path& p, error_code& ec);
-    path proximate(const path& p, const path& base = current_path());
-    path proximate(const path& p, const path& base, error_code &ec);
-
-    path read_symlink(const path& p);
-    path read_symlink(const path& p, error_code& ec);
-
-    path relative(const path& p, error_code& ec);
-    path relative(const path& p, const path& base=current_path());
-    path relative(const path& p, const path& base, error_code& ec);
-
-    bool remove(const path& p);
-    bool remove(const path& p, error_code& ec) noexcept;
-
-    uintmax_t    remove_all(const path& p);
-    uintmax_t    remove_all(const path& p, error_code& ec);
-
-    void rename(const path& from, const path& to);
-    void rename(const path& from, const path& to, error_code& ec) noexcept;
-
-    void resize_file(const path& p, uintmax_t size);
-    void resize_file(const path& p, uintmax_t size, error_code& ec) noexcept;
-
-    space_info   space(const path& p);
-    space_info   space(const path& p, error_code& ec) noexcept;
-
-    file_status  status(const path& p);
-    file_status  status(const path& p, error_code& ec) noexcept;
-
-    bool status_known(file_status s) noexcept;
-
-    file_status  symlink_status(const path& p);
-    file_status  symlink_status(const path& p, error_code& ec) noexcept;
-
-    path temp_directory_path();
-    path temp_directory_path(error_code& ec);
-
-    path weakly_canonical(path const& p);
-    path weakly_canonical(path const& p, error_code& ec);
-
-
-} }  // namespaces std::filesystem
-
-*/
-
-#include <__config>
-#include <cstddef>
-#include <cstdlib>
-#include <chrono>
-#include <iterator>
-#include <iosfwd>
-#include <locale>
-#include <memory>
-#include <stack>
-#include <string>
-#include <system_error>
-#include <utility>
-#include <iomanip> // for quoted
-#include <string_view>
-#include <version>
-
-#include <__debug>
-
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
-#endif
-
-_LIBCPP_PUSH_MACROS
-#include <__undef_macros>
-
-#ifndef _LIBCPP_CXX03_LANG
-
-_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
-
-typedef chrono::time_point<_FilesystemClock> file_time_type;
-
-struct _LIBCPP_TYPE_VIS space_info {
-  uintmax_t capacity;
-  uintmax_t free;
-  uintmax_t available;
-};
-
-enum class _LIBCPP_ENUM_VIS file_type : signed char {
-  none = 0,
-  not_found = -1,
-  regular = 1,
-  directory = 2,
-  symlink = 3,
-  block = 4,
-  character = 5,
-  fifo = 6,
-  socket = 7,
-  unknown = 8
-};
-
-enum class _LIBCPP_ENUM_VIS perms : unsigned {
-  none = 0,
-
-  owner_read = 0400,
-  owner_write = 0200,
-  owner_exec = 0100,
-  owner_all = 0700,
-
-  group_read = 040,
-  group_write = 020,
-  group_exec = 010,
-  group_all = 070,
-
-  others_read = 04,
-  others_write = 02,
-  others_exec = 01,
-  others_all = 07,
-
-  all = 0777,
-
-  set_uid = 04000,
-  set_gid = 02000,
-  sticky_bit = 01000,
-  mask = 07777,
-  unknown = 0xFFFF,
-};
-
-_LIBCPP_INLINE_VISIBILITY
-inline constexpr perms operator&(perms _LHS, perms _RHS) {
-  return static_cast<perms>(static_cast<unsigned>(_LHS) &
-                            static_cast<unsigned>(_RHS));
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline constexpr perms operator|(perms _LHS, perms _RHS) {
-  return static_cast<perms>(static_cast<unsigned>(_LHS) |
-                            static_cast<unsigned>(_RHS));
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline constexpr perms operator^(perms _LHS, perms _RHS) {
-  return static_cast<perms>(static_cast<unsigned>(_LHS) ^
-                            static_cast<unsigned>(_RHS));
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline constexpr perms operator~(perms _LHS) {
-  return static_cast<perms>(~static_cast<unsigned>(_LHS));
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline perms& operator&=(perms& _LHS, perms _RHS) { return _LHS = _LHS & _RHS; }
-
-_LIBCPP_INLINE_VISIBILITY
-inline perms& operator|=(perms& _LHS, perms _RHS) { return _LHS = _LHS | _RHS; }
-
-_LIBCPP_INLINE_VISIBILITY
-inline perms& operator^=(perms& _LHS, perms _RHS) { return _LHS = _LHS ^ _RHS; }
-
-enum class _LIBCPP_ENUM_VIS perm_options : unsigned char {
-  replace = 1,
-  add = 2,
-  remove = 4,
-  nofollow = 8
-};
-
-_LIBCPP_INLINE_VISIBILITY
-inline constexpr perm_options operator&(perm_options _LHS, perm_options _RHS) {
-  return static_cast<perm_options>(static_cast<unsigned>(_LHS) &
-                                   static_cast<unsigned>(_RHS));
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline constexpr perm_options operator|(perm_options _LHS, perm_options _RHS) {
-  return static_cast<perm_options>(static_cast<unsigned>(_LHS) |
-                                   static_cast<unsigned>(_RHS));
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline constexpr perm_options operator^(perm_options _LHS, perm_options _RHS) {
-  return static_cast<perm_options>(static_cast<unsigned>(_LHS) ^
-                                   static_cast<unsigned>(_RHS));
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline constexpr perm_options operator~(perm_options _LHS) {
-  return static_cast<perm_options>(~static_cast<unsigned>(_LHS));
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline perm_options& operator&=(perm_options& _LHS, perm_options _RHS) {
-  return _LHS = _LHS & _RHS;
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline perm_options& operator|=(perm_options& _LHS, perm_options _RHS) {
-  return _LHS = _LHS | _RHS;
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline perm_options& operator^=(perm_options& _LHS, perm_options _RHS) {
-  return _LHS = _LHS ^ _RHS;
-}
-
-enum class _LIBCPP_ENUM_VIS copy_options : unsigned short {
-  none = 0,
-  skip_existing = 1,
-  overwrite_existing = 2,
-  update_existing = 4,
-  recursive = 8,
-  copy_symlinks = 16,
-  skip_symlinks = 32,
-  directories_only = 64,
-  create_symlinks = 128,
-  create_hard_links = 256,
-  __in_recursive_copy = 512,
-};
-
-_LIBCPP_INLINE_VISIBILITY
-inline constexpr copy_options operator&(copy_options _LHS, copy_options _RHS) {
-  return static_cast<copy_options>(static_cast<unsigned short>(_LHS) &
-                                   static_cast<unsigned short>(_RHS));
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline constexpr copy_options operator|(copy_options _LHS, copy_options _RHS) {
-  return static_cast<copy_options>(static_cast<unsigned short>(_LHS) |
-                                   static_cast<unsigned short>(_RHS));
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline constexpr copy_options operator^(copy_options _LHS, copy_options _RHS) {
-  return static_cast<copy_options>(static_cast<unsigned short>(_LHS) ^
-                                   static_cast<unsigned short>(_RHS));
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline constexpr copy_options operator~(copy_options _LHS) {
-  return static_cast<copy_options>(~static_cast<unsigned short>(_LHS));
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline copy_options& operator&=(copy_options& _LHS, copy_options _RHS) {
-  return _LHS = _LHS & _RHS;
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline copy_options& operator|=(copy_options& _LHS, copy_options _RHS) {
-  return _LHS = _LHS | _RHS;
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline copy_options& operator^=(copy_options& _LHS, copy_options _RHS) {
-  return _LHS = _LHS ^ _RHS;
-}
-
-enum class _LIBCPP_ENUM_VIS directory_options : unsigned char {
-  none = 0,
-  follow_directory_symlink = 1,
-  skip_permission_denied = 2
-};
-
-_LIBCPP_INLINE_VISIBILITY
-inline constexpr directory_options operator&(directory_options _LHS,
-                                             directory_options _RHS) {
-  return static_cast<directory_options>(static_cast<unsigned char>(_LHS) &
-                                        static_cast<unsigned char>(_RHS));
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline constexpr directory_options operator|(directory_options _LHS,
-                                             directory_options _RHS) {
-  return static_cast<directory_options>(static_cast<unsigned char>(_LHS) |
-                                        static_cast<unsigned char>(_RHS));
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline constexpr directory_options operator^(directory_options _LHS,
-                                             directory_options _RHS) {
-  return static_cast<directory_options>(static_cast<unsigned char>(_LHS) ^
-                                        static_cast<unsigned char>(_RHS));
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline constexpr directory_options operator~(directory_options _LHS) {
-  return static_cast<directory_options>(~static_cast<unsigned char>(_LHS));
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline directory_options& operator&=(directory_options& _LHS,
-                                     directory_options _RHS) {
-  return _LHS = _LHS & _RHS;
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline directory_options& operator|=(directory_options& _LHS,
-                                     directory_options _RHS) {
-  return _LHS = _LHS | _RHS;
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline directory_options& operator^=(directory_options& _LHS,
-                                     directory_options _RHS) {
-  return _LHS = _LHS ^ _RHS;
-}
-
-class _LIBCPP_TYPE_VIS file_status {
-public:
-  // constructors
-  _LIBCPP_INLINE_VISIBILITY
-  file_status() noexcept : file_status(file_type::none) {}
-  _LIBCPP_INLINE_VISIBILITY
-  explicit file_status(file_type __ft, perms __prms = perms::unknown) noexcept
-      : __ft_(__ft),
-        __prms_(__prms) {}
-
-  file_status(const file_status&) noexcept = default;
-  file_status(file_status&&) noexcept = default;
-
-  _LIBCPP_INLINE_VISIBILITY
-  ~file_status() {}
-
-  file_status& operator=(const file_status&) noexcept = default;
-  file_status& operator=(file_status&&) noexcept = default;
-
-  // observers
-  _LIBCPP_INLINE_VISIBILITY
-  file_type type() const noexcept { return __ft_; }
-
-  _LIBCPP_INLINE_VISIBILITY
-  perms permissions() const noexcept { return __prms_; }
-
-  // modifiers
-  _LIBCPP_INLINE_VISIBILITY
-  void type(file_type __ft) noexcept { __ft_ = __ft; }
-
-  _LIBCPP_INLINE_VISIBILITY
-  void permissions(perms __p) noexcept { __prms_ = __p; }
-
-private:
-  file_type __ft_;
-  perms __prms_;
-};
-
-class _LIBCPP_TYPE_VIS directory_entry;
-
-template <class _Tp>
-struct __can_convert_char {
-  static const bool value = false;
-};
-template <class _Tp>
-struct __can_convert_char<const _Tp> : public __can_convert_char<_Tp> {};
-template <>
-struct __can_convert_char<char> {
-  static const bool value = true;
-  using __char_type = char;
-};
-template <>
-struct __can_convert_char<wchar_t> {
-  static const bool value = true;
-  using __char_type = wchar_t;
-};
-template <>
-struct __can_convert_char<char16_t> {
-  static const bool value = true;
-  using __char_type = char16_t;
-};
-template <>
-struct __can_convert_char<char32_t> {
-  static const bool value = true;
-  using __char_type = char32_t;
-};
-
-template <class _ECharT>
-typename enable_if<__can_convert_char<_ECharT>::value, bool>::type
-__is_separator(_ECharT __e) {
-  return __e == _ECharT('/');
-}
-
-struct _NullSentinal {};
-
-template <class _Tp>
-using _Void = void;
-
-template <class _Tp, class = void>
-struct __is_pathable_string : public false_type {};
-
-template <class _ECharT, class _Traits, class _Alloc>
-struct __is_pathable_string<
-    basic_string<_ECharT, _Traits, _Alloc>,
-    _Void<typename __can_convert_char<_ECharT>::__char_type> >
-    : public __can_convert_char<_ECharT> {
-  using _Str = basic_string<_ECharT, _Traits, _Alloc>;
-  using _Base = __can_convert_char<_ECharT>;
-  static _ECharT const* __range_begin(_Str const& __s) { return __s.data(); }
-  static _ECharT const* __range_end(_Str const& __s) {
-    return __s.data() + __s.length();
-  }
-  static _ECharT __first_or_null(_Str const& __s) {
-    return __s.empty() ? _ECharT{} : __s[0];
-  }
-};
-
-template <class _ECharT, class _Traits>
-struct __is_pathable_string<
-    basic_string_view<_ECharT, _Traits>,
-    _Void<typename __can_convert_char<_ECharT>::__char_type> >
-    : public __can_convert_char<_ECharT> {
-  using _Str = basic_string_view<_ECharT, _Traits>;
-  using _Base = __can_convert_char<_ECharT>;
-  static _ECharT const* __range_begin(_Str const& __s) { return __s.data(); }
-  static _ECharT const* __range_end(_Str const& __s) {
-    return __s.data() + __s.length();
-  }
-  static _ECharT __first_or_null(_Str const& __s) {
-    return __s.empty() ? _ECharT{} : __s[0];
-  }
-};
-
-template <class _Source, class _DS = typename decay<_Source>::type,
-          class _UnqualPtrType =
-              typename remove_const<typename remove_pointer<_DS>::type>::type,
-          bool _IsCharPtr = is_pointer<_DS>::value&&
-              __can_convert_char<_UnqualPtrType>::value>
-struct __is_pathable_char_array : false_type {};
-
-template <class _Source, class _ECharT, class _UPtr>
-struct __is_pathable_char_array<_Source, _ECharT*, _UPtr, true>
-    : __can_convert_char<typename remove_const<_ECharT>::type> {
-  using _Base = __can_convert_char<typename remove_const<_ECharT>::type>;
-
-  static _ECharT const* __range_begin(const _ECharT* __b) { return __b; }
-  static _ECharT const* __range_end(const _ECharT* __b) {
-    using _Iter = const _ECharT*;
-    const _ECharT __sentinal = _ECharT{};
-    _Iter __e = __b;
-    for (; *__e != __sentinal; ++__e)
-      ;
-    return __e;
-  }
-
-  static _ECharT __first_or_null(const _ECharT* __b) { return *__b; }
-};
-
-template <class _Iter, bool _IsIt = __is_input_iterator<_Iter>::value,
-          class = void>
-struct __is_pathable_iter : false_type {};
-
-template <class _Iter>
-struct __is_pathable_iter<
-    _Iter, true,
-    _Void<typename __can_convert_char<
-        typename iterator_traits<_Iter>::value_type>::__char_type> >
-    : __can_convert_char<typename iterator_traits<_Iter>::value_type> {
-  using _ECharT = typename iterator_traits<_Iter>::value_type;
-  using _Base = __can_convert_char<_ECharT>;
-
-  static _Iter __range_begin(_Iter __b) { return __b; }
-  static _NullSentinal __range_end(_Iter) { return _NullSentinal{}; }
-
-  static _ECharT __first_or_null(_Iter __b) { return *__b; }
-};
-
-template <class _Tp, bool _IsStringT = __is_pathable_string<_Tp>::value,
-          bool _IsCharIterT = __is_pathable_char_array<_Tp>::value,
-          bool _IsIterT = !_IsCharIterT && __is_pathable_iter<_Tp>::value>
-struct __is_pathable : false_type {
-  static_assert(!_IsStringT && !_IsCharIterT && !_IsIterT, "Must all be false");
-};
-
-template <class _Tp>
-struct __is_pathable<_Tp, true, false, false> : __is_pathable_string<_Tp> {};
-
-template <class _Tp>
-struct __is_pathable<_Tp, false, true, false> : __is_pathable_char_array<_Tp> {
-};
-
-template <class _Tp>
-struct __is_pathable<_Tp, false, false, true> : __is_pathable_iter<_Tp> {};
-
-template <class _ECharT>
-struct _PathCVT {
-  static_assert(__can_convert_char<_ECharT>::value,
-                "Char type not convertible");
-
-  typedef __narrow_to_utf8<sizeof(_ECharT) * __CHAR_BIT__> _Narrower;
-
-  static void __append_range(string& __dest, _ECharT const* __b,
-                             _ECharT const* __e) {
-    _Narrower()(back_inserter(__dest), __b, __e);
-  }
-
-  template <class _Iter>
-  static void __append_range(string& __dest, _Iter __b, _Iter __e) {
-    static_assert(!is_same<_Iter, _ECharT*>::value, "Call const overload");
-    if (__b == __e)
-      return;
-    basic_string<_ECharT> __tmp(__b, __e);
-    _Narrower()(back_inserter(__dest), __tmp.data(),
-                __tmp.data() + __tmp.length());
-  }
-
-  template <class _Iter>
-  static void __append_range(string& __dest, _Iter __b, _NullSentinal) {
-    static_assert(!is_same<_Iter, _ECharT*>::value, "Call const overload");
-    const _ECharT __sentinal = _ECharT{};
-    if (*__b == __sentinal)
-      return;
-    basic_string<_ECharT> __tmp;
-    for (; *__b != __sentinal; ++__b)
-      __tmp.push_back(*__b);
-    _Narrower()(back_inserter(__dest), __tmp.data(),
-                __tmp.data() + __tmp.length());
-  }
-
-  template <class _Source>
-  static void __append_source(string& __dest, _Source const& __s) {
-    using _Traits = __is_pathable<_Source>;
-    __append_range(__dest, _Traits::__range_begin(__s),
-                   _Traits::__range_end(__s));
-  }
-};
-
-template <>
-struct _PathCVT<char> {
-
-  template <class _Iter>
-  static typename enable_if<__is_exactly_input_iterator<_Iter>::value>::type
-  __append_range(string& __dest, _Iter __b, _Iter __e) {
-    for (; __b != __e; ++__b)
-      __dest.push_back(*__b);
-  }
-
-  template <class _Iter>
-  static typename enable_if<__is_forward_iterator<_Iter>::value>::type
-  __append_range(string& __dest, _Iter __b, _Iter __e) {
-    __dest.__append_forward_unsafe(__b, __e);
-  }
-
-  template <class _Iter>
-  static void __append_range(string& __dest, _Iter __b, _NullSentinal) {
-    const char __sentinal = char{};
-    for (; *__b != __sentinal; ++__b)
-      __dest.push_back(*__b);
-  }
-
-  template <class _Source>
-  static void __append_source(string& __dest, _Source const& __s) {
-    using _Traits = __is_pathable<_Source>;
-    __append_range(__dest, _Traits::__range_begin(__s),
-                   _Traits::__range_end(__s));
-  }
-};
-
-class _LIBCPP_TYPE_VIS path {
-  template <class _SourceOrIter, class _Tp = path&>
-  using _EnableIfPathable =
-      typename enable_if<__is_pathable<_SourceOrIter>::value, _Tp>::type;
-
-  template <class _Tp>
-  using _SourceChar = typename __is_pathable<_Tp>::__char_type;
-
-  template <class _Tp>
-  using _SourceCVT = _PathCVT<_SourceChar<_Tp> >;
-
-public:
-  typedef char value_type;
-  typedef basic_string<value_type> string_type;
-  typedef _VSTD::string_view __string_view;
-  static constexpr value_type preferred_separator = '/';
-
-  enum class _LIBCPP_ENUM_VIS format : unsigned char {
-    auto_format,
-    native_format,
-    generic_format
-  };
-
-  // constructors and destructor
-  _LIBCPP_INLINE_VISIBILITY path() noexcept {}
-  _LIBCPP_INLINE_VISIBILITY path(const path& __p) : __pn_(__p.__pn_) {}
-  _LIBCPP_INLINE_VISIBILITY path(path&& __p) noexcept
-      : __pn_(_VSTD::move(__p.__pn_)) {}
-
-  _LIBCPP_INLINE_VISIBILITY
-  path(string_type&& __s, format = format::auto_format) noexcept
-      : __pn_(_VSTD::move(__s)) {}
-
-  template <class _Source, class = _EnableIfPathable<_Source, void> >
-  path(const _Source& __src, format = format::auto_format) {
-    _SourceCVT<_Source>::__append_source(__pn_, __src);
-  }
-
-  template <class _InputIt>
-  path(_InputIt __first, _InputIt __last, format = format::auto_format) {
-    typedef typename iterator_traits<_InputIt>::value_type _ItVal;
-    _PathCVT<_ItVal>::__append_range(__pn_, __first, __last);
-  }
-
-  // TODO Implement locale conversions.
-  template <class _Source, class = _EnableIfPathable<_Source, void> >
-  path(const _Source& __src, const locale& __loc, format = format::auto_format);
-  template <class _InputIt>
-  path(_InputIt __first, _InputIt _last, const locale& __loc,
-       format = format::auto_format);
-
-  _LIBCPP_INLINE_VISIBILITY
-  ~path() = default;
-
-  // assignments
-  _LIBCPP_INLINE_VISIBILITY
-  path& operator=(const path& __p) {
-    __pn_ = __p.__pn_;
-    return *this;
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  path& operator=(path&& __p) noexcept {
-    __pn_ = _VSTD::move(__p.__pn_);
-    return *this;
-  }
-
-  template <class = void>
-  _LIBCPP_INLINE_VISIBILITY path& operator=(string_type&& __s) noexcept {
-    __pn_ = _VSTD::move(__s);
-    return *this;
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  path& assign(string_type&& __s) noexcept {
-    __pn_ = _VSTD::move(__s);
-    return *this;
-  }
-
-  template <class _Source>
-  _LIBCPP_INLINE_VISIBILITY _EnableIfPathable<_Source>
-  operator=(const _Source& __src) {
-    return this->assign(__src);
-  }
-
-  template <class _Source>
-  _EnableIfPathable<_Source> assign(const _Source& __src) {
-    __pn_.clear();
-    _SourceCVT<_Source>::__append_source(__pn_, __src);
-    return *this;
-  }
-
-  template <class _InputIt>
-  path& assign(_InputIt __first, _InputIt __last) {
-    typedef typename iterator_traits<_InputIt>::value_type _ItVal;
-    __pn_.clear();
-    _PathCVT<_ItVal>::__append_range(__pn_, __first, __last);
-    return *this;
-  }
-
-private:
-  template <class _ECharT>
-  static bool __source_is_absolute(_ECharT __first_or_null) {
-    return __is_separator(__first_or_null);
-  }
-
-public:
-  // appends
-  path& operator/=(const path& __p) {
-    if (__p.is_absolute()) {
-      __pn_ = __p.__pn_;
-      return *this;
-    }
-    if (has_filename())
-      __pn_ += preferred_separator;
-    __pn_ += __p.native();
-    return *this;
-  }
-
-  // FIXME: Use _LIBCPP_DIAGNOSE_WARNING to produce a diagnostic when __src
-  // is known at compile time to be "/' since the user almost certainly intended
-  // to append a separator instead of overwriting the path with "/"
-  template <class _Source>
-  _LIBCPP_INLINE_VISIBILITY _EnableIfPathable<_Source>
-  operator/=(const _Source& __src) {
-    return this->append(__src);
-  }
-
-  template <class _Source>
-  _EnableIfPathable<_Source> append(const _Source& __src) {
-    using _Traits = __is_pathable<_Source>;
-    using _CVT = _PathCVT<_SourceChar<_Source> >;
-    if (__source_is_absolute(_Traits::__first_or_null(__src)))
-      __pn_.clear();
-    else if (has_filename())
-      __pn_ += preferred_separator;
-    _CVT::__append_source(__pn_, __src);
-    return *this;
-  }
-
-  template <class _InputIt>
-  path& append(_InputIt __first, _InputIt __last) {
-    typedef typename iterator_traits<_InputIt>::value_type _ItVal;
-    static_assert(__can_convert_char<_ItVal>::value, "Must convertible");
-    using _CVT = _PathCVT<_ItVal>;
-    if (__first != __last && __source_is_absolute(*__first))
-      __pn_.clear();
-    else if (has_filename())
-      __pn_ += preferred_separator;
-    _CVT::__append_range(__pn_, __first, __last);
-    return *this;
-  }
-
-  // concatenation
-  _LIBCPP_INLINE_VISIBILITY
-  path& operator+=(const path& __x) {
-    __pn_ += __x.__pn_;
-    return *this;
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  path& operator+=(const string_type& __x) {
-    __pn_ += __x;
-    return *this;
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  path& operator+=(__string_view __x) {
-    __pn_ += __x;
-    return *this;
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  path& operator+=(const value_type* __x) {
-    __pn_ += __x;
-    return *this;
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  path& operator+=(value_type __x) {
-    __pn_ += __x;
-    return *this;
-  }
-
-  template <class _ECharT>
-  typename enable_if<__can_convert_char<_ECharT>::value, path&>::type
-  operator+=(_ECharT __x) {
-    basic_string<_ECharT> __tmp;
-    __tmp += __x;
-    _PathCVT<_ECharT>::__append_source(__pn_, __tmp);
-    return *this;
-  }
-
-  template <class _Source>
-  _EnableIfPathable<_Source> operator+=(const _Source& __x) {
-    return this->concat(__x);
-  }
-
-  template <class _Source>
-  _EnableIfPathable<_Source> concat(const _Source& __x) {
-    _SourceCVT<_Source>::__append_source(__pn_, __x);
-    return *this;
-  }
-
-  template <class _InputIt>
-  path& concat(_InputIt __first, _InputIt __last) {
-    typedef typename iterator_traits<_InputIt>::value_type _ItVal;
-    _PathCVT<_ItVal>::__append_range(__pn_, __first, __last);
-    return *this;
-  }
-
-  // modifiers
-  _LIBCPP_INLINE_VISIBILITY
-  void clear() noexcept { __pn_.clear(); }
-
-  path& make_preferred() { return *this; }
-
-  _LIBCPP_INLINE_VISIBILITY
-  path& remove_filename() {
-    auto __fname = __filename();
-    if (!__fname.empty())
-      __pn_.erase(__fname.data() - __pn_.data());
-    return *this;
-  }
-
-  path& replace_filename(const path& __replacement) {
-    remove_filename();
-    return (*this /= __replacement);
-  }
-
-  path& replace_extension(const path& __replacement = path());
-
-  _LIBCPP_INLINE_VISIBILITY
-  void swap(path& __rhs) noexcept { __pn_.swap(__rhs.__pn_); }
-
-  // private helper to allow reserving memory in the path
-  _LIBCPP_INLINE_VISIBILITY
-  void __reserve(size_t __s) { __pn_.reserve(__s); }
-
-  // native format observers
-  _LIBCPP_INLINE_VISIBILITY
-  const string_type& native() const noexcept { return __pn_; }
-
-  _LIBCPP_INLINE_VISIBILITY
-  const value_type* c_str() const noexcept { return __pn_.c_str(); }
-
-  _LIBCPP_INLINE_VISIBILITY operator string_type() const { return __pn_; }
-
-  template <class _ECharT, class _Traits = char_traits<_ECharT>,
-            class _Allocator = allocator<_ECharT> >
-  basic_string<_ECharT, _Traits, _Allocator>
-  string(const _Allocator& __a = _Allocator()) const {
-    using _CVT = __widen_from_utf8<sizeof(_ECharT) * __CHAR_BIT__>;
-    using _Str = basic_string<_ECharT, _Traits, _Allocator>;
-    _Str __s(__a);
-    __s.reserve(__pn_.size());
-    _CVT()(back_inserter(__s), __pn_.data(), __pn_.data() + __pn_.size());
-    return __s;
-  }
-
-  _LIBCPP_INLINE_VISIBILITY std::string string() const { return __pn_; }
-  _LIBCPP_INLINE_VISIBILITY std::wstring wstring() const {
-    return string<wchar_t>();
-  }
-  _LIBCPP_INLINE_VISIBILITY std::string u8string() const { return __pn_; }
-  _LIBCPP_INLINE_VISIBILITY std::u16string u16string() const {
-    return string<char16_t>();
-  }
-  _LIBCPP_INLINE_VISIBILITY std::u32string u32string() const {
-    return string<char32_t>();
-  }
-
-  // generic format observers
-  template <class _ECharT, class _Traits = char_traits<_ECharT>,
-            class _Allocator = allocator<_ECharT> >
-  basic_string<_ECharT, _Traits, _Allocator>
-  generic_string(const _Allocator& __a = _Allocator()) const {
-    return string<_ECharT, _Traits, _Allocator>(__a);
-  }
-
-  std::string generic_string() const { return __pn_; }
-  std::wstring generic_wstring() const { return string<wchar_t>(); }
-  std::string generic_u8string() const { return __pn_; }
-  std::u16string generic_u16string() const { return string<char16_t>(); }
-  std::u32string generic_u32string() const { return string<char32_t>(); }
-
-private:
-  int __compare(__string_view) const;
-  __string_view __root_name() const;
-  __string_view __root_directory() const;
-  __string_view __root_path_raw() const;
-  __string_view __relative_path() const;
-  __string_view __parent_path() const;
-  __string_view __filename() const;
-  __string_view __stem() const;
-  __string_view __extension() const;
-
-public:
-  // compare
-  _LIBCPP_INLINE_VISIBILITY int compare(const path& __p) const noexcept {
-    return __compare(__p.__pn_);
-  }
-  _LIBCPP_INLINE_VISIBILITY int compare(const string_type& __s) const {
-    return __compare(__s);
-  }
-  _LIBCPP_INLINE_VISIBILITY int compare(__string_view __s) const {
-    return __compare(__s);
-  }
-  _LIBCPP_INLINE_VISIBILITY int compare(const value_type* __s) const {
-    return __compare(__s);
-  }
-
-  // decomposition
-  _LIBCPP_INLINE_VISIBILITY path root_name() const {
-    return string_type(__root_name());
-  }
-  _LIBCPP_INLINE_VISIBILITY path root_directory() const {
-    return string_type(__root_directory());
-  }
-  _LIBCPP_INLINE_VISIBILITY path root_path() const {
-    return root_name().append(string_type(__root_directory()));
-  }
-  _LIBCPP_INLINE_VISIBILITY path relative_path() const {
-    return string_type(__relative_path());
-  }
-  _LIBCPP_INLINE_VISIBILITY path parent_path() const {
-    return string_type(__parent_path());
-  }
-  _LIBCPP_INLINE_VISIBILITY path filename() const {
-    return string_type(__filename());
-  }
-  _LIBCPP_INLINE_VISIBILITY path stem() const { return string_type(__stem()); }
-  _LIBCPP_INLINE_VISIBILITY path extension() const {
-    return string_type(__extension());
-  }
-
-  // query
-  _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY bool
-  empty() const noexcept {
-    return __pn_.empty();
-  }
-
-  _LIBCPP_INLINE_VISIBILITY bool has_root_name() const {
-    return !__root_name().empty();
-  }
-  _LIBCPP_INLINE_VISIBILITY bool has_root_directory() const {
-    return !__root_directory().empty();
-  }
-  _LIBCPP_INLINE_VISIBILITY bool has_root_path() const {
-    return !__root_path_raw().empty();
-  }
-  _LIBCPP_INLINE_VISIBILITY bool has_relative_path() const {
-    return !__relative_path().empty();
-  }
-  _LIBCPP_INLINE_VISIBILITY bool has_parent_path() const {
-    return !__parent_path().empty();
-  }
-  _LIBCPP_INLINE_VISIBILITY bool has_filename() const {
-    return !__filename().empty();
-  }
-  _LIBCPP_INLINE_VISIBILITY bool has_stem() const { return !__stem().empty(); }
-  _LIBCPP_INLINE_VISIBILITY bool has_extension() const {
-    return !__extension().empty();
-  }
-
-  _LIBCPP_INLINE_VISIBILITY bool is_absolute() const {
-    return has_root_directory();
-  }
-  _LIBCPP_INLINE_VISIBILITY bool is_relative() const { return !is_absolute(); }
-
-  // relative paths
-  path lexically_normal() const;
-  path lexically_relative(const path& __base) const;
-
-  _LIBCPP_INLINE_VISIBILITY path lexically_proximate(const path& __base) const {
-    path __result = this->lexically_relative(__base);
-    if (__result.native().empty())
-      return *this;
-    return __result;
-  }
-
-  // iterators
-  class _LIBCPP_TYPE_VIS iterator;
-  typedef iterator const_iterator;
-
-  iterator begin() const;
-  iterator end() const;
-
-  template <class _CharT, class _Traits>
-  _LIBCPP_INLINE_VISIBILITY friend
-      typename enable_if<is_same<_CharT, char>::value &&
-                             is_same<_Traits, char_traits<char> >::value,
-                         basic_ostream<_CharT, _Traits>&>::type
-      operator<<(basic_ostream<_CharT, _Traits>& __os, const path& __p) {
-    __os << std::__quoted(__p.native());
-    return __os;
-  }
-
-  template <class _CharT, class _Traits>
-  _LIBCPP_INLINE_VISIBILITY friend
-      typename enable_if<!is_same<_CharT, char>::value ||
-                             !is_same<_Traits, char_traits<char> >::value,
-                         basic_ostream<_CharT, _Traits>&>::type
-      operator<<(basic_ostream<_CharT, _Traits>& __os, const path& __p) {
-    __os << std::__quoted(__p.string<_CharT, _Traits>());
-    return __os;
-  }
-
-  template <class _CharT, class _Traits>
-  _LIBCPP_INLINE_VISIBILITY friend basic_istream<_CharT, _Traits>&
-  operator>>(basic_istream<_CharT, _Traits>& __is, path& __p) {
-    basic_string<_CharT, _Traits> __tmp;
-    __is >> __quoted(__tmp);
-    __p = __tmp;
-    return __is;
-  }
-
-  friend _LIBCPP_INLINE_VISIBILITY bool operator==(const path& __lhs, const path& __rhs) noexcept {
-    return __lhs.compare(__rhs) == 0;
-  }
-  friend _LIBCPP_INLINE_VISIBILITY bool operator!=(const path& __lhs, const path& __rhs) noexcept {
-    return __lhs.compare(__rhs) != 0;
-  }
-  friend _LIBCPP_INLINE_VISIBILITY bool operator<(const path& __lhs, const path& __rhs) noexcept {
-    return __lhs.compare(__rhs) < 0;
-  }
-  friend _LIBCPP_INLINE_VISIBILITY bool operator<=(const path& __lhs, const path& __rhs) noexcept {
-    return __lhs.compare(__rhs) <= 0;
-  }
-  friend _LIBCPP_INLINE_VISIBILITY bool operator>(const path& __lhs, const path& __rhs) noexcept {
-    return __lhs.compare(__rhs) > 0;
-  }
-  friend _LIBCPP_INLINE_VISIBILITY bool operator>=(const path& __lhs, const path& __rhs) noexcept {
-    return __lhs.compare(__rhs) >= 0;
-  }
-
-  friend _LIBCPP_INLINE_VISIBILITY path operator/(const path& __lhs,
-                                                  const path& __rhs) {
-    path __result(__lhs);
-    __result /= __rhs;
-    return __result;
-  }
-private:
-  inline _LIBCPP_INLINE_VISIBILITY path&
-  __assign_view(__string_view const& __s) noexcept {
-    __pn_ = string_type(__s);
-    return *this;
-  }
-  string_type __pn_;
-};
-
-inline _LIBCPP_INLINE_VISIBILITY void swap(path& __lhs, path& __rhs) noexcept {
-  __lhs.swap(__rhs);
-}
-
-_LIBCPP_FUNC_VIS
-size_t hash_value(const path& __p) noexcept;
-
-template <class _Source>
-_LIBCPP_INLINE_VISIBILITY
-    typename enable_if<__is_pathable<_Source>::value, path>::type
-    u8path(const _Source& __s) {
-  static_assert(
-      is_same<typename __is_pathable<_Source>::__char_type, char>::value,
-      "u8path(Source const&) requires Source have a character type of type "
-      "'char'");
-  return path(__s);
-}
-
-template <class _InputIt>
-_LIBCPP_INLINE_VISIBILITY
-    typename enable_if<__is_pathable<_InputIt>::value, path>::type
-    u8path(_InputIt __f, _InputIt __l) {
-  static_assert(
-      is_same<typename __is_pathable<_InputIt>::__char_type, char>::value,
-      "u8path(Iter, Iter) requires Iter have a value_type of type 'char'");
-  return path(__f, __l);
-}
-
-class _LIBCPP_TYPE_VIS path::iterator {
-public:
-  enum _ParserState : unsigned char {
-    _Singular,
-    _BeforeBegin,
-    _InRootName,
-    _InRootDir,
-    _InFilenames,
-    _InTrailingSep,
-    _AtEnd
-  };
-
-public:
-  typedef bidirectional_iterator_tag iterator_category;
-
-  typedef path value_type;
-  typedef std::ptrdiff_t difference_type;
-  typedef const path* pointer;
-  typedef const path& reference;
-
-  typedef void
-      __stashing_iterator_tag; // See reverse_iterator and __is_stashing_iterator
-
-public:
-  _LIBCPP_INLINE_VISIBILITY
-  iterator()
-      : __stashed_elem_(), __path_ptr_(nullptr), __entry_(),
-        __state_(_Singular) {}
-
-  iterator(const iterator&) = default;
-  ~iterator() = default;
-
-  iterator& operator=(const iterator&) = default;
-
-  _LIBCPP_INLINE_VISIBILITY
-  reference operator*() const { return __stashed_elem_; }
-
-  _LIBCPP_INLINE_VISIBILITY
-  pointer operator->() const { return &__stashed_elem_; }
-
-  _LIBCPP_INLINE_VISIBILITY
-  iterator& operator++() {
-    _LIBCPP_ASSERT(__state_ != _Singular,
-                   "attempting to increment a singular iterator");
-    _LIBCPP_ASSERT(__state_ != _AtEnd,
-                   "attempting to increment the end iterator");
-    return __increment();
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  iterator operator++(int) {
-    iterator __it(*this);
-    this->operator++();
-    return __it;
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  iterator& operator--() {
-    _LIBCPP_ASSERT(__state_ != _Singular,
-                   "attempting to decrement a singular iterator");
-    _LIBCPP_ASSERT(__entry_.data() != __path_ptr_->native().data(),
-                   "attempting to decrement the begin iterator");
-    return __decrement();
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  iterator operator--(int) {
-    iterator __it(*this);
-    this->operator--();
-    return __it;
-  }
-
-private:
-  friend class path;
-
-  inline _LIBCPP_INLINE_VISIBILITY friend bool operator==(const iterator&,
-                                                          const iterator&);
-
-  iterator& __increment();
-  iterator& __decrement();
-
-  path __stashed_elem_;
-  const path* __path_ptr_;
-  path::__string_view __entry_;
-  _ParserState __state_;
-};
-
-inline _LIBCPP_INLINE_VISIBILITY bool operator==(const path::iterator& __lhs,
-                                                 const path::iterator& __rhs) {
-  return __lhs.__path_ptr_ == __rhs.__path_ptr_ &&
-         __lhs.__entry_.data() == __rhs.__entry_.data();
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool operator!=(const path::iterator& __lhs,
-                                                 const path::iterator& __rhs) {
-  return !(__lhs == __rhs);
-}
-
-class _LIBCPP_EXCEPTION_ABI filesystem_error : public system_error {
-public:
-  _LIBCPP_INLINE_VISIBILITY
-  filesystem_error(const string& __what, error_code __ec)
-      : system_error(__ec, __what),
-        __storage_(make_shared<_Storage>(path(), path())) {
-    __create_what(0);
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  filesystem_error(const string& __what, const path& __p1, error_code __ec)
-      : system_error(__ec, __what),
-        __storage_(make_shared<_Storage>(__p1, path())) {
-    __create_what(1);
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  filesystem_error(const string& __what, const path& __p1, const path& __p2,
-                   error_code __ec)
-      : system_error(__ec, __what),
-        __storage_(make_shared<_Storage>(__p1, __p2)) {
-    __create_what(2);
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  const path& path1() const noexcept { return __storage_->__p1_; }
-
-  _LIBCPP_INLINE_VISIBILITY
-  const path& path2() const noexcept { return __storage_->__p2_; }
-
-  ~filesystem_error() override; // key function
-
-  _LIBCPP_INLINE_VISIBILITY
-  const char* what() const noexcept override {
-    return __storage_->__what_.c_str();
-  }
-
-  _LIBCPP_FUNC_VIS
-  void __create_what(int __num_paths);
-
-private:
-  struct _Storage {
-    _LIBCPP_INLINE_VISIBILITY
-    _Storage(const path& __p1, const path& __p2) : __p1_(__p1), __p2_(__p2) {}
-
-    path __p1_;
-    path __p2_;
-    string __what_;
-  };
-  shared_ptr<_Storage> __storage_;
-};
-
-template <class... _Args>
-_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
-#ifndef _LIBCPP_NO_EXCEPTIONS
-    void
-    __throw_filesystem_error(_Args&&... __args) {
-  throw filesystem_error(std::forward<_Args>(__args)...);
-}
-#else
-    void
-    __throw_filesystem_error(_Args&&...) {
-  _VSTD::abort();
-}
-#endif
-
-// operational functions
-
-_LIBCPP_FUNC_VIS
-path __absolute(const path&, error_code* __ec = nullptr);
-_LIBCPP_FUNC_VIS
-path __canonical(const path&, error_code* __ec = nullptr);
-_LIBCPP_FUNC_VIS
-void __copy(const path& __from, const path& __to, copy_options __opt,
-            error_code* __ec = nullptr);
-_LIBCPP_FUNC_VIS
-bool __copy_file(const path& __from, const path& __to, copy_options __opt,
-                 error_code* __ec = nullptr);
-_LIBCPP_FUNC_VIS
-void __copy_symlink(const path& __existing_symlink, const path& __new_symlink,
-                    error_code* __ec = nullptr);
-_LIBCPP_FUNC_VIS
-bool __create_directories(const path& p, error_code* ec = nullptr);
-_LIBCPP_FUNC_VIS
-bool __create_directory(const path& p, error_code* ec = nullptr);
-_LIBCPP_FUNC_VIS
-bool __create_directory(const path& p, const path& attributes,
-                        error_code* ec = nullptr);
-_LIBCPP_FUNC_VIS
-void __create_directory_symlink(const path& __to, const path& __new_symlink,
-                                error_code* __ec = nullptr);
-_LIBCPP_FUNC_VIS
-void __create_hard_link(const path& __to, const path& __new_hard_link,
-                        error_code* __ec = nullptr);
-_LIBCPP_FUNC_VIS
-void __create_symlink(const path& __to, const path& __new_symlink,
-                      error_code* __ec = nullptr);
-_LIBCPP_FUNC_VIS
-path __current_path(error_code* __ec = nullptr);
-_LIBCPP_FUNC_VIS
-void __current_path(const path&, error_code* __ec = nullptr);
-_LIBCPP_FUNC_VIS
-bool __equivalent(const path&, const path&, error_code* __ec = nullptr);
-_LIBCPP_FUNC_VIS
-uintmax_t __file_size(const path&, error_code* __ec = nullptr);
-_LIBCPP_FUNC_VIS
-uintmax_t __hard_link_count(const path&, error_code* __ec = nullptr);
-_LIBCPP_FUNC_VIS
-bool __fs_is_empty(const path& p, error_code* ec = nullptr);
-_LIBCPP_FUNC_VIS
-file_time_type __last_write_time(const path& p, error_code* ec = nullptr);
-_LIBCPP_FUNC_VIS
-void __last_write_time(const path& p, file_time_type new_time,
-                       error_code* ec = nullptr);
-_LIBCPP_FUNC_VIS
-void __permissions(const path&, perms, perm_options, error_code* = nullptr);
-_LIBCPP_FUNC_VIS
-path __read_symlink(const path& p, error_code* ec = nullptr);
-_LIBCPP_FUNC_VIS
-bool __remove(const path& p, error_code* ec = nullptr);
-_LIBCPP_FUNC_VIS
-uintmax_t __remove_all(const path& p, error_code* ec = nullptr);
-_LIBCPP_FUNC_VIS
-void __rename(const path& from, const path& to, error_code* ec = nullptr);
-_LIBCPP_FUNC_VIS
-void __resize_file(const path& p, uintmax_t size, error_code* ec = nullptr);
-_LIBCPP_FUNC_VIS
-space_info __space(const path&, error_code* __ec = nullptr);
-_LIBCPP_FUNC_VIS
-file_status __status(const path&, error_code* __ec = nullptr);
-_LIBCPP_FUNC_VIS
-file_status __symlink_status(const path&, error_code* __ec = nullptr);
-_LIBCPP_FUNC_VIS
-path __system_complete(const path&, error_code* __ec = nullptr);
-_LIBCPP_FUNC_VIS
-path __temp_directory_path(error_code* __ec = nullptr);
-_LIBCPP_FUNC_VIS
-path __weakly_canonical(path const& __p, error_code* __ec = nullptr);
-
-inline _LIBCPP_INLINE_VISIBILITY path current_path() {
-  return __current_path();
-}
-
-inline _LIBCPP_INLINE_VISIBILITY path current_path(error_code& __ec) {
-  return __current_path(&__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void current_path(const path& __p) {
-  __current_path(__p);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void current_path(const path& __p,
-                                                   error_code& __ec) noexcept {
-  __current_path(__p, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY path absolute(const path& __p) {
-  return __absolute(__p);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY path absolute(const path& __p,
-                                               error_code& __ec) {
-  return __absolute(__p, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY path canonical(const path& __p) {
-  return __canonical(__p);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY path canonical(const path& __p,
-                                                error_code& __ec) {
-  return __canonical(__p, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void copy(const path& __from,
-                                           const path& __to) {
-  __copy(__from, __to, copy_options::none);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void copy(const path& __from, const path& __to,
-                                           error_code& __ec) {
-  __copy(__from, __to, copy_options::none, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void copy(const path& __from, const path& __to,
-                                           copy_options __opt) {
-  __copy(__from, __to, __opt);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void copy(const path& __from, const path& __to,
-                                           copy_options __opt,
-                                           error_code& __ec) {
-  __copy(__from, __to, __opt, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool copy_file(const path& __from,
-                                                const path& __to) {
-  return __copy_file(__from, __to, copy_options::none);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool
-copy_file(const path& __from, const path& __to, error_code& __ec) {
-  return __copy_file(__from, __to, copy_options::none, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool
-copy_file(const path& __from, const path& __to, copy_options __opt) {
-  return __copy_file(__from, __to, __opt);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool copy_file(const path& __from,
-                                                const path& __to,
-                                                copy_options __opt,
-                                                error_code& __ec) {
-  return __copy_file(__from, __to, __opt, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void copy_symlink(const path& __existing,
-                                                   const path& __new) {
-  __copy_symlink(__existing, __new);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void
-copy_symlink(const path& __ext, const path& __new, error_code& __ec) noexcept {
-  __copy_symlink(__ext, __new, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool create_directories(const path& __p) {
-  return __create_directories(__p);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool create_directories(const path& __p,
-                                                         error_code& __ec) {
-  return __create_directories(__p, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool create_directory(const path& __p) {
-  return __create_directory(__p);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool
-create_directory(const path& __p, error_code& __ec) noexcept {
-  return __create_directory(__p, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool create_directory(const path& __p,
-                                                       const path& __attrs) {
-  return __create_directory(__p, __attrs);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool
-create_directory(const path& __p, const path& __attrs,
-                 error_code& __ec) noexcept {
-  return __create_directory(__p, __attrs, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void
-create_directory_symlink(const path& __to, const path& __new) {
-  __create_directory_symlink(__to, __new);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void
-create_directory_symlink(const path& __to, const path& __new,
-                         error_code& __ec) noexcept {
-  __create_directory_symlink(__to, __new, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void create_hard_link(const path& __to,
-                                                       const path& __new) {
-  __create_hard_link(__to, __new);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void
-create_hard_link(const path& __to, const path& __new,
-                 error_code& __ec) noexcept {
-  __create_hard_link(__to, __new, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void create_symlink(const path& __to,
-                                                     const path& __new) {
-  __create_symlink(__to, __new);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void
-create_symlink(const path& __to, const path& __new, error_code& __ec) noexcept {
-  return __create_symlink(__to, __new, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool status_known(file_status __s) noexcept {
-  return __s.type() != file_type::none;
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool exists(file_status __s) noexcept {
-  return status_known(__s) && __s.type() != file_type::not_found;
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool exists(const path& __p) {
-  return exists(__status(__p));
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool exists(const path& __p,
-                                             error_code& __ec) noexcept {
-  auto __s = __status(__p, &__ec);
-  if (status_known(__s))
-    __ec.clear();
-  return exists(__s);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool equivalent(const path& __p1,
-                                                 const path& __p2) {
-  return __equivalent(__p1, __p2);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool
-equivalent(const path& __p1, const path& __p2, error_code& __ec) noexcept {
-  return __equivalent(__p1, __p2, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY uintmax_t file_size(const path& __p) {
-  return __file_size(__p);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY uintmax_t
-file_size(const path& __p, error_code& __ec) noexcept {
-  return __file_size(__p, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY uintmax_t hard_link_count(const path& __p) {
-  return __hard_link_count(__p);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY uintmax_t
-hard_link_count(const path& __p, error_code& __ec) noexcept {
-  return __hard_link_count(__p, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool is_block_file(file_status __s) noexcept {
-  return __s.type() == file_type::block;
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool is_block_file(const path& __p) {
-  return is_block_file(__status(__p));
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool is_block_file(const path& __p,
-                                                    error_code& __ec) noexcept {
-  return is_block_file(__status(__p, &__ec));
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool
-is_character_file(file_status __s) noexcept {
-  return __s.type() == file_type::character;
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool is_character_file(const path& __p) {
-  return is_character_file(__status(__p));
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool
-is_character_file(const path& __p, error_code& __ec) noexcept {
-  return is_character_file(__status(__p, &__ec));
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool is_directory(file_status __s) noexcept {
-  return __s.type() == file_type::directory;
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool is_directory(const path& __p) {
-  return is_directory(__status(__p));
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool is_directory(const path& __p,
-                                                   error_code& __ec) noexcept {
-  return is_directory(__status(__p, &__ec));
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool is_empty(const path& __p) {
-  return __fs_is_empty(__p);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool is_empty(const path& __p,
-                                               error_code& __ec) {
-  return __fs_is_empty(__p, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool is_fifo(file_status __s) noexcept {
-  return __s.type() == file_type::fifo;
-}
-inline _LIBCPP_INLINE_VISIBILITY bool is_fifo(const path& __p) {
-  return is_fifo(__status(__p));
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool is_fifo(const path& __p,
-                                              error_code& __ec) noexcept {
-  return is_fifo(__status(__p, &__ec));
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool
-is_regular_file(file_status __s) noexcept {
-  return __s.type() == file_type::regular;
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool is_regular_file(const path& __p) {
-  return is_regular_file(__status(__p));
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool
-is_regular_file(const path& __p, error_code& __ec) noexcept {
-  return is_regular_file(__status(__p, &__ec));
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool is_socket(file_status __s) noexcept {
-  return __s.type() == file_type::socket;
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool is_socket(const path& __p) {
-  return is_socket(__status(__p));
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool is_socket(const path& __p,
-                                                error_code& __ec) noexcept {
-  return is_socket(__status(__p, &__ec));
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool is_symlink(file_status __s) noexcept {
-  return __s.type() == file_type::symlink;
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool is_symlink(const path& __p) {
-  return is_symlink(__symlink_status(__p));
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool is_symlink(const path& __p,
-                                                 error_code& __ec) noexcept {
-  return is_symlink(__symlink_status(__p, &__ec));
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool is_other(file_status __s) noexcept {
-  return exists(__s) && !is_regular_file(__s) && !is_directory(__s) &&
-         !is_symlink(__s);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool is_other(const path& __p) {
-  return is_other(__status(__p));
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool is_other(const path& __p,
-                                               error_code& __ec) noexcept {
-  return is_other(__status(__p, &__ec));
-}
-
-inline _LIBCPP_INLINE_VISIBILITY file_time_type
-last_write_time(const path& __p) {
-  return __last_write_time(__p);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY file_time_type
-last_write_time(const path& __p, error_code& __ec) noexcept {
-  return __last_write_time(__p, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void last_write_time(const path& __p,
-                                                      file_time_type __t) {
-  __last_write_time(__p, __t);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void
-last_write_time(const path& __p, file_time_type __t,
-                error_code& __ec) noexcept {
-  __last_write_time(__p, __t, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void
-permissions(const path& __p, perms __prms,
-            perm_options __opts = perm_options::replace) {
-  __permissions(__p, __prms, __opts);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void permissions(const path& __p, perms __prms,
-                                                  error_code& __ec) noexcept {
-  __permissions(__p, __prms, perm_options::replace, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void permissions(const path& __p, perms __prms,
-                                                  perm_options __opts,
-                                                  error_code& __ec) {
-  __permissions(__p, __prms, __opts, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY path proximate(const path& __p,
-                                                const path& __base,
-                                                error_code& __ec) {
-  path __tmp = __weakly_canonical(__p, &__ec);
-  if (__ec)
-    return {};
-  path __tmp_base = __weakly_canonical(__base, &__ec);
-  if (__ec)
-    return {};
-  return __tmp.lexically_proximate(__tmp_base);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY path proximate(const path& __p,
-                                                error_code& __ec) {
-  return proximate(__p, current_path(), __ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY path
-proximate(const path& __p, const path& __base = current_path()) {
-  return __weakly_canonical(__p).lexically_proximate(
-      __weakly_canonical(__base));
-}
-
-inline _LIBCPP_INLINE_VISIBILITY path read_symlink(const path& __p) {
-  return __read_symlink(__p);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY path read_symlink(const path& __p,
-                                                   error_code& __ec) {
-  return __read_symlink(__p, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY path relative(const path& __p,
-                                               const path& __base,
-                                               error_code& __ec) {
-  path __tmp = __weakly_canonical(__p, &__ec);
-  if (__ec)
-    return path();
-  path __tmpbase = __weakly_canonical(__base, &__ec);
-  if (__ec)
-    return path();
-  return __tmp.lexically_relative(__tmpbase);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY path relative(const path& __p,
-                                               error_code& __ec) {
-  return relative(__p, current_path(), __ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY path
-relative(const path& __p, const path& __base = current_path()) {
-  return __weakly_canonical(__p).lexically_relative(__weakly_canonical(__base));
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool remove(const path& __p) {
-  return __remove(__p);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool remove(const path& __p,
-                                             error_code& __ec) noexcept {
-  return __remove(__p, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY uintmax_t remove_all(const path& __p) {
-  return __remove_all(__p);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY uintmax_t remove_all(const path& __p,
-                                                      error_code& __ec) {
-  return __remove_all(__p, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void rename(const path& __from,
-                                             const path& __to) {
-  return __rename(__from, __to);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void
-rename(const path& __from, const path& __to, error_code& __ec) noexcept {
-  return __rename(__from, __to, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void resize_file(const path& __p,
-                                                  uintmax_t __ns) {
-  return __resize_file(__p, __ns);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY void
-resize_file(const path& __p, uintmax_t __ns, error_code& __ec) noexcept {
-  return __resize_file(__p, __ns, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY space_info space(const path& __p) {
-  return __space(__p);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY space_info space(const path& __p,
-                                                  error_code& __ec) noexcept {
-  return __space(__p, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY file_status status(const path& __p) {
-  return __status(__p);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY file_status status(const path& __p,
-                                                    error_code& __ec) noexcept {
-  return __status(__p, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY file_status symlink_status(const path& __p) {
-  return __symlink_status(__p);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY file_status
-symlink_status(const path& __p, error_code& __ec) noexcept {
-  return __symlink_status(__p, &__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY path temp_directory_path() {
-  return __temp_directory_path();
-}
-
-inline _LIBCPP_INLINE_VISIBILITY path temp_directory_path(error_code& __ec) {
-  return __temp_directory_path(&__ec);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY path weakly_canonical(path const& __p) {
-  return __weakly_canonical(__p);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY path weakly_canonical(path const& __p,
-                                                       error_code& __ec) {
-  return __weakly_canonical(__p, &__ec);
-}
-
-class directory_iterator;
-class recursive_directory_iterator;
-class __dir_stream;
-
-class directory_entry {
-  typedef _VSTD_FS::path _Path;
-
-public:
-  // constructors and destructors
-  directory_entry() noexcept = default;
-  directory_entry(directory_entry const&) = default;
-  directory_entry(directory_entry&&) noexcept = default;
-
-  _LIBCPP_INLINE_VISIBILITY
-  explicit directory_entry(_Path const& __p) : __p_(__p) {
-    error_code __ec;
-    __refresh(&__ec);
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  directory_entry(_Path const& __p, error_code& __ec) : __p_(__p) {
-    __refresh(&__ec);
-  }
-
-  ~directory_entry() {}
-
-  directory_entry& operator=(directory_entry const&) = default;
-  directory_entry& operator=(directory_entry&&) noexcept = default;
-
-  _LIBCPP_INLINE_VISIBILITY
-  void assign(_Path const& __p) {
-    __p_ = __p;
-    error_code __ec;
-    __refresh(&__ec);
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  void assign(_Path const& __p, error_code& __ec) {
-    __p_ = __p;
-    __refresh(&__ec);
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  void replace_filename(_Path const& __p) {
-    __p_.replace_filename(__p);
-    error_code __ec;
-    __refresh(&__ec);
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  void replace_filename(_Path const& __p, error_code& __ec) {
-    __p_ = __p_.parent_path() / __p;
-    __refresh(&__ec);
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  void refresh() { __refresh(); }
-
-  _LIBCPP_INLINE_VISIBILITY
-  void refresh(error_code& __ec) noexcept { __refresh(&__ec); }
-
-  _LIBCPP_INLINE_VISIBILITY
-  _Path const& path() const noexcept { return __p_; }
-
-  _LIBCPP_INLINE_VISIBILITY
-  operator const _Path&() const noexcept { return __p_; }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool exists() const { return _VSTD_FS::exists(file_status{__get_ft()}); }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool exists(error_code& __ec) const noexcept {
-    return _VSTD_FS::exists(file_status{__get_ft(&__ec)});
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool is_block_file() const { return __get_ft() == file_type::block; }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool is_block_file(error_code& __ec) const noexcept {
-    return __get_ft(&__ec) == file_type::block;
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool is_character_file() const { return __get_ft() == file_type::character; }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool is_character_file(error_code& __ec) const noexcept {
-    return __get_ft(&__ec) == file_type::character;
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool is_directory() const { return __get_ft() == file_type::directory; }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool is_directory(error_code& __ec) const noexcept {
-    return __get_ft(&__ec) == file_type::directory;
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool is_fifo() const { return __get_ft() == file_type::fifo; }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool is_fifo(error_code& __ec) const noexcept {
-    return __get_ft(&__ec) == file_type::fifo;
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool is_other() const { return _VSTD_FS::is_other(file_status{__get_ft()}); }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool is_other(error_code& __ec) const noexcept {
-    return _VSTD_FS::is_other(file_status{__get_ft(&__ec)});
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool is_regular_file() const { return __get_ft() == file_type::regular; }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool is_regular_file(error_code& __ec) const noexcept {
-    return __get_ft(&__ec) == file_type::regular;
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool is_socket() const { return __get_ft() == file_type::socket; }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool is_socket(error_code& __ec) const noexcept {
-    return __get_ft(&__ec) == file_type::socket;
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool is_symlink() const { return __get_sym_ft() == file_type::symlink; }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool is_symlink(error_code& __ec) const noexcept {
-    return __get_sym_ft(&__ec) == file_type::symlink;
-  }
-  _LIBCPP_INLINE_VISIBILITY
-  uintmax_t file_size() const { return __get_size(); }
-
-  _LIBCPP_INLINE_VISIBILITY
-  uintmax_t file_size(error_code& __ec) const noexcept {
-    return __get_size(&__ec);
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  uintmax_t hard_link_count() const { return __get_nlink(); }
-
-  _LIBCPP_INLINE_VISIBILITY
-  uintmax_t hard_link_count(error_code& __ec) const noexcept {
-    return __get_nlink(&__ec);
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  file_time_type last_write_time() const { return __get_write_time(); }
-
-  _LIBCPP_INLINE_VISIBILITY
-  file_time_type last_write_time(error_code& __ec) const noexcept {
-    return __get_write_time(&__ec);
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  file_status status() const { return __get_status(); }
-
-  _LIBCPP_INLINE_VISIBILITY
-  file_status status(error_code& __ec) const noexcept {
-    return __get_status(&__ec);
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  file_status symlink_status() const { return __get_symlink_status(); }
-
-  _LIBCPP_INLINE_VISIBILITY
-  file_status symlink_status(error_code& __ec) const noexcept {
-    return __get_symlink_status(&__ec);
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool operator<(directory_entry const& __rhs) const noexcept {
-    return __p_ < __rhs.__p_;
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool operator==(directory_entry const& __rhs) const noexcept {
-    return __p_ == __rhs.__p_;
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool operator!=(directory_entry const& __rhs) const noexcept {
-    return __p_ != __rhs.__p_;
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool operator<=(directory_entry const& __rhs) const noexcept {
-    return __p_ <= __rhs.__p_;
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool operator>(directory_entry const& __rhs) const noexcept {
-    return __p_ > __rhs.__p_;
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool operator>=(directory_entry const& __rhs) const noexcept {
-    return __p_ >= __rhs.__p_;
-  }
-
-private:
-  friend class directory_iterator;
-  friend class recursive_directory_iterator;
-  friend class __dir_stream;
-
-  enum _CacheType : unsigned char {
-    _Empty,
-    _IterSymlink,
-    _IterNonSymlink,
-    _RefreshSymlink,
-    _RefreshSymlinkUnresolved,
-    _RefreshNonSymlink
-  };
-
-  struct __cached_data {
-    uintmax_t __size_;
-    uintmax_t __nlink_;
-    file_time_type __write_time_;
-    perms __sym_perms_;
-    perms __non_sym_perms_;
-    file_type __type_;
-    _CacheType __cache_type_;
-
-    _LIBCPP_INLINE_VISIBILITY
-    __cached_data() noexcept { __reset(); }
-
-    _LIBCPP_INLINE_VISIBILITY
-    void __reset() {
-      __cache_type_ = _Empty;
-      __type_ = file_type::none;
-      __sym_perms_ = __non_sym_perms_ = perms::unknown;
-      __size_ = __nlink_ = uintmax_t(-1);
-      __write_time_ = file_time_type::min();
-    }
-  };
-
-  _LIBCPP_INLINE_VISIBILITY
-  static __cached_data __create_iter_result(file_type __ft) {
-    __cached_data __data;
-    __data.__type_ = __ft;
-    __data.__cache_type_ = [&]() {
-      switch (__ft) {
-      case file_type::none:
-        return _Empty;
-      case file_type::symlink:
-        return _IterSymlink;
-      default:
-        return _IterNonSymlink;
-      }
-    }();
-    return __data;
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  void __assign_iter_entry(_Path&& __p, __cached_data __dt) {
-    __p_ = std::move(__p);
-    __data_ = __dt;
-  }
-
-  _LIBCPP_FUNC_VIS
-  error_code __do_refresh() noexcept;
-
-  _LIBCPP_INLINE_VISIBILITY
-  static bool __is_dne_error(error_code const& __ec) {
-    if (!__ec)
-      return true;
-    switch (static_cast<errc>(__ec.value())) {
-    case errc::no_such_file_or_directory:
-    case errc::not_a_directory:
-      return true;
-    default:
-      return false;
-    }
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  void __handle_error(const char* __msg, error_code* __dest_ec,
-                      error_code const& __ec, bool __allow_dne = false) const {
-    if (__dest_ec) {
-      *__dest_ec = __ec;
-      return;
-    }
-    if (__ec && (!__allow_dne || !__is_dne_error(__ec)))
-      __throw_filesystem_error(__msg, __p_, __ec);
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  void __refresh(error_code* __ec = nullptr) {
-    __handle_error("in directory_entry::refresh", __ec, __do_refresh(),
-                   /*allow_dne*/ true);
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  file_type __get_sym_ft(error_code* __ec = nullptr) const {
-    switch (__data_.__cache_type_) {
-    case _Empty:
-      return __symlink_status(__p_, __ec).type();
-    case _IterSymlink:
-    case _RefreshSymlink:
-    case _RefreshSymlinkUnresolved:
-      if (__ec)
-        __ec->clear();
-      return file_type::symlink;
-    case _IterNonSymlink:
-    case _RefreshNonSymlink:
-      file_status __st(__data_.__type_);
-      if (__ec && !_VSTD_FS::exists(__st))
-        *__ec = make_error_code(errc::no_such_file_or_directory);
-      else if (__ec)
-        __ec->clear();
-      return __data_.__type_;
-    }
-    _LIBCPP_UNREACHABLE();
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  file_type __get_ft(error_code* __ec = nullptr) const {
-    switch (__data_.__cache_type_) {
-    case _Empty:
-    case _IterSymlink:
-    case _RefreshSymlinkUnresolved:
-      return __status(__p_, __ec).type();
-    case _IterNonSymlink:
-    case _RefreshNonSymlink:
-    case _RefreshSymlink: {
-      file_status __st(__data_.__type_);
-      if (__ec && !_VSTD_FS::exists(__st))
-        *__ec = make_error_code(errc::no_such_file_or_directory);
-      else if (__ec)
-        __ec->clear();
-      return __data_.__type_;
-    }
-    }
-    _LIBCPP_UNREACHABLE();
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  file_status __get_status(error_code* __ec = nullptr) const {
-    switch (__data_.__cache_type_) {
-    case _Empty:
-    case _IterNonSymlink:
-    case _IterSymlink:
-    case _RefreshSymlinkUnresolved:
-      return __status(__p_, __ec);
-    case _RefreshNonSymlink:
-    case _RefreshSymlink:
-      return file_status(__get_ft(__ec), __data_.__non_sym_perms_);
-    }
-    _LIBCPP_UNREACHABLE();
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  file_status __get_symlink_status(error_code* __ec = nullptr) const {
-    switch (__data_.__cache_type_) {
-    case _Empty:
-    case _IterNonSymlink:
-    case _IterSymlink:
-      return __symlink_status(__p_, __ec);
-    case _RefreshNonSymlink:
-      return file_status(__get_sym_ft(__ec), __data_.__non_sym_perms_);
-    case _RefreshSymlink:
-    case _RefreshSymlinkUnresolved:
-      return file_status(__get_sym_ft(__ec), __data_.__sym_perms_);
-    }
-    _LIBCPP_UNREACHABLE();
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  uintmax_t __get_size(error_code* __ec = nullptr) const {
-    switch (__data_.__cache_type_) {
-    case _Empty:
-    case _IterNonSymlink:
-    case _IterSymlink:
-    case _RefreshSymlinkUnresolved:
-      return _VSTD_FS::__file_size(__p_, __ec);
-    case _RefreshSymlink:
-    case _RefreshNonSymlink: {
-      error_code __m_ec;
-      file_status __st(__get_ft(&__m_ec));
-      __handle_error("in directory_entry::file_size", __ec, __m_ec);
-      if (_VSTD_FS::exists(__st) && !_VSTD_FS::is_regular_file(__st)) {
-        errc __err_kind = _VSTD_FS::is_directory(__st) ? errc::is_a_directory
-                                                       : errc::not_supported;
-        __handle_error("in directory_entry::file_size", __ec,
-                       make_error_code(__err_kind));
-      }
-      return __data_.__size_;
-    }
-    }
-    _LIBCPP_UNREACHABLE();
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  uintmax_t __get_nlink(error_code* __ec = nullptr) const {
-    switch (__data_.__cache_type_) {
-    case _Empty:
-    case _IterNonSymlink:
-    case _IterSymlink:
-    case _RefreshSymlinkUnresolved:
-      return _VSTD_FS::__hard_link_count(__p_, __ec);
-    case _RefreshSymlink:
-    case _RefreshNonSymlink: {
-      error_code __m_ec;
-      (void)__get_ft(&__m_ec);
-      __handle_error("in directory_entry::hard_link_count", __ec, __m_ec);
-      return __data_.__nlink_;
-    }
-    }
-    _LIBCPP_UNREACHABLE();
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  file_time_type __get_write_time(error_code* __ec = nullptr) const {
-    switch (__data_.__cache_type_) {
-    case _Empty:
-    case _IterNonSymlink:
-    case _IterSymlink:
-    case _RefreshSymlinkUnresolved:
-      return _VSTD_FS::__last_write_time(__p_, __ec);
-    case _RefreshSymlink:
-    case _RefreshNonSymlink: {
-      error_code __m_ec;
-      file_status __st(__get_ft(&__m_ec));
-      __handle_error("in directory_entry::last_write_time", __ec, __m_ec);
-      if (_VSTD_FS::exists(__st) &&
-          __data_.__write_time_ == file_time_type::min())
-        __handle_error("in directory_entry::last_write_time", __ec,
-                       make_error_code(errc::value_too_large));
-      return __data_.__write_time_;
-    }
-    }
-    _LIBCPP_UNREACHABLE();
-  }
-
-private:
-  _Path __p_;
-  __cached_data __data_;
-};
-
-class __dir_element_proxy {
-public:
-  inline _LIBCPP_INLINE_VISIBILITY directory_entry operator*() {
-    return _VSTD::move(__elem_);
-  }
-
-private:
-  friend class directory_iterator;
-  friend class recursive_directory_iterator;
-  explicit __dir_element_proxy(directory_entry const& __e) : __elem_(__e) {}
-  __dir_element_proxy(__dir_element_proxy&& __o)
-      : __elem_(_VSTD::move(__o.__elem_)) {}
-  directory_entry __elem_;
-};
-
-class directory_iterator {
-public:
-  typedef directory_entry value_type;
-  typedef ptrdiff_t difference_type;
-  typedef value_type const* pointer;
-  typedef value_type const& reference;
-  typedef input_iterator_tag iterator_category;
-
-public:
-  //ctor & dtor
-  directory_iterator() noexcept {}
-
-  explicit directory_iterator(const path& __p)
-      : directory_iterator(__p, nullptr) {}
-
-  directory_iterator(const path& __p, directory_options __opts)
-      : directory_iterator(__p, nullptr, __opts) {}
-
-  directory_iterator(const path& __p, error_code& __ec)
-      : directory_iterator(__p, &__ec) {}
-
-  directory_iterator(const path& __p, directory_options __opts,
-                     error_code& __ec)
-      : directory_iterator(__p, &__ec, __opts) {}
-
-  directory_iterator(const directory_iterator&) = default;
-  directory_iterator(directory_iterator&&) = default;
-  directory_iterator& operator=(const directory_iterator&) = default;
-
-  directory_iterator& operator=(directory_iterator&& __o) noexcept {
-    // non-default implementation provided to support self-move assign.
-    if (this != &__o) {
-      __imp_ = _VSTD::move(__o.__imp_);
-    }
-    return *this;
-  }
-
-  ~directory_iterator() = default;
-
-  const directory_entry& operator*() const {
-    _LIBCPP_ASSERT(__imp_, "The end iterator cannot be dereferenced");
-    return __dereference();
-  }
-
-  const directory_entry* operator->() const { return &**this; }
-
-  directory_iterator& operator++() { return __increment(); }
-
-  __dir_element_proxy operator++(int) {
-    __dir_element_proxy __p(**this);
-    __increment();
-    return __p;
-  }
-
-  directory_iterator& increment(error_code& __ec) { return __increment(&__ec); }
-
-private:
-  inline _LIBCPP_INLINE_VISIBILITY friend bool
-  operator==(const directory_iterator& __lhs,
-             const directory_iterator& __rhs) noexcept;
-
-  // construct the dir_stream
-  _LIBCPP_FUNC_VIS
-  directory_iterator(const path&, error_code*,
-                     directory_options = directory_options::none);
-
-  _LIBCPP_FUNC_VIS
-  directory_iterator& __increment(error_code* __ec = nullptr);
-
-  _LIBCPP_FUNC_VIS
-  const directory_entry& __dereference() const;
-
-private:
-  shared_ptr<__dir_stream> __imp_;
-};
-
-inline _LIBCPP_INLINE_VISIBILITY bool
-operator==(const directory_iterator& __lhs,
-           const directory_iterator& __rhs) noexcept {
-  return __lhs.__imp_ == __rhs.__imp_;
-}
-
-inline _LIBCPP_INLINE_VISIBILITY bool
-operator!=(const directory_iterator& __lhs,
-           const directory_iterator& __rhs) noexcept {
-  return !(__lhs == __rhs);
-}
-
-// enable directory_iterator range-based for statements
-inline _LIBCPP_INLINE_VISIBILITY directory_iterator
-begin(directory_iterator __iter) noexcept {
-  return __iter;
-}
-
-inline _LIBCPP_INLINE_VISIBILITY directory_iterator
-end(const directory_iterator&) noexcept {
-  return directory_iterator();
-}
-
-class recursive_directory_iterator {
-public:
-  using value_type = directory_entry;
-  using difference_type = std::ptrdiff_t;
-  using pointer = directory_entry const*;
-  using reference = directory_entry const&;
-  using iterator_category = std::input_iterator_tag;
-
-public:
-  // constructors and destructor
-  _LIBCPP_INLINE_VISIBILITY
-  recursive_directory_iterator() noexcept : __rec_(false) {}
-
-  _LIBCPP_INLINE_VISIBILITY
-  explicit recursive_directory_iterator(
-      const path& __p, directory_options __xoptions = directory_options::none)
-      : recursive_directory_iterator(__p, __xoptions, nullptr) {}
-
-  _LIBCPP_INLINE_VISIBILITY
-  recursive_directory_iterator(const path& __p, directory_options __xoptions,
-                               error_code& __ec)
-      : recursive_directory_iterator(__p, __xoptions, &__ec) {}
-
-  _LIBCPP_INLINE_VISIBILITY
-  recursive_directory_iterator(const path& __p, error_code& __ec)
-      : recursive_directory_iterator(__p, directory_options::none, &__ec) {}
-
-  recursive_directory_iterator(const recursive_directory_iterator&) = default;
-  recursive_directory_iterator(recursive_directory_iterator&&) = default;
-
-  recursive_directory_iterator&
-  operator=(const recursive_directory_iterator&) = default;
-
-  _LIBCPP_INLINE_VISIBILITY
-  recursive_directory_iterator&
-  operator=(recursive_directory_iterator&& __o) noexcept {
-    // non-default implementation provided to support self-move assign.
-    if (this != &__o) {
-      __imp_ = _VSTD::move(__o.__imp_);
-      __rec_ = __o.__rec_;
-    }
-    return *this;
-  }
-
-  ~recursive_directory_iterator() = default;
-
-  _LIBCPP_INLINE_VISIBILITY
-  const directory_entry& operator*() const { return __dereference(); }
-
-  _LIBCPP_INLINE_VISIBILITY
-  const directory_entry* operator->() const { return &__dereference(); }
-
-  recursive_directory_iterator& operator++() { return __increment(); }
-
-  _LIBCPP_INLINE_VISIBILITY
-  __dir_element_proxy operator++(int) {
-    __dir_element_proxy __p(**this);
-    __increment();
-    return __p;
-  }
-
-  _LIBCPP_INLINE_VISIBILITY
-  recursive_directory_iterator& increment(error_code& __ec) {
-    return __increment(&__ec);
-  }
-
-  _LIBCPP_FUNC_VIS directory_options options() const;
-  _LIBCPP_FUNC_VIS int depth() const;
-
-  _LIBCPP_INLINE_VISIBILITY
-  void pop() { __pop(); }
-
-  _LIBCPP_INLINE_VISIBILITY
-  void pop(error_code& __ec) { __pop(&__ec); }
-
-  _LIBCPP_INLINE_VISIBILITY
-  bool recursion_pending() const { return __rec_; }
-
-  _LIBCPP_INLINE_VISIBILITY
-  void disable_recursion_pending() { __rec_ = false; }
-
-private:
-  recursive_directory_iterator(const path& __p, directory_options __opt,
-                               error_code* __ec);
-
-  _LIBCPP_FUNC_VIS
-  const directory_entry& __dereference() const;
-
-  _LIBCPP_FUNC_VIS
-  bool __try_recursion(error_code* __ec);
-
-  _LIBCPP_FUNC_VIS
-  void __advance(error_code* __ec = nullptr);
-
-  _LIBCPP_FUNC_VIS
-  recursive_directory_iterator& __increment(error_code* __ec = nullptr);
-
-  _LIBCPP_FUNC_VIS
-  void __pop(error_code* __ec = nullptr);
-
-  inline _LIBCPP_INLINE_VISIBILITY friend bool
-  operator==(const recursive_directory_iterator&,
-             const recursive_directory_iterator&) noexcept;
-
-  struct __shared_imp;
-  shared_ptr<__shared_imp> __imp_;
-  bool __rec_;
-}; // class recursive_directory_iterator
-
-inline _LIBCPP_INLINE_VISIBILITY bool
-operator==(const recursive_directory_iterator& __lhs,
-           const recursive_directory_iterator& __rhs) noexcept {
-  return __lhs.__imp_ == __rhs.__imp_;
-}
-
-_LIBCPP_INLINE_VISIBILITY
-inline bool operator!=(const recursive_directory_iterator& __lhs,
-                       const recursive_directory_iterator& __rhs) noexcept {
-  return !(__lhs == __rhs);
-}
-// enable recursive_directory_iterator range-based for statements
-inline _LIBCPP_INLINE_VISIBILITY recursive_directory_iterator
-begin(recursive_directory_iterator __iter) noexcept {
-  return __iter;
-}
-
-inline _LIBCPP_INLINE_VISIBILITY recursive_directory_iterator
-end(const recursive_directory_iterator&) noexcept {
-  return recursive_directory_iterator();
-}
-
-_LIBCPP_END_NAMESPACE_FILESYSTEM
-
-#endif // !_LIBCPP_CXX03_LANG
-
-_LIBCPP_POP_MACROS
-
-#endif // _LIBCPP_FILESYSTEM