| // -*- 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 <__debug> | 
 |  | 
 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) | 
 | #pragma GCC system_header | 
 | #endif | 
 |  | 
 | _LIBCPP_PUSH_MACROS | 
 | #include <__undef_macros> | 
 |  | 
 | #ifndef _LIBCPP_CXX03_LANG | 
 |  | 
 | #if _LIBCPP_STD_VER >= 17 | 
 | #define __cpp_lib_filesystem 201703 | 
 | #endif | 
 |  | 
 | _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM | 
 |  | 
 | struct _FilesystemClock { | 
 | #if !defined(_LIBCPP_HAS_NO_INT128) | 
 |   typedef __int128_t rep; | 
 |   typedef nano period; | 
 | #else | 
 |   typedef long long rep; | 
 |   typedef nano period; | 
 | #endif | 
 |  | 
 |   typedef chrono::duration<rep, period> duration; | 
 |   typedef chrono::time_point<_FilesystemClock> time_point; | 
 |  | 
 |   static _LIBCPP_CONSTEXPR_AFTER_CXX11 const bool is_steady = false; | 
 |  | 
 |   _LIBCPP_FUNC_VIS static time_point now() noexcept; | 
 |  | 
 |   _LIBCPP_INLINE_VISIBILITY | 
 |   static time_t to_time_t(const time_point& __t) noexcept { | 
 |     typedef chrono::duration<rep> __secs; | 
 |     return time_t( | 
 |         chrono::duration_cast<__secs>(__t.time_since_epoch()).count()); | 
 |   } | 
 |  | 
 |   _LIBCPP_INLINE_VISIBILITY | 
 |   static time_point from_time_t(time_t __t) noexcept { | 
 |     typedef chrono::duration<rep> __secs; | 
 |     return time_point(__secs(__t)); | 
 |   } | 
 | }; | 
 |  | 
 | 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; | 
 |   } | 
 |  | 
 | 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; | 
 |  | 
 | inline _LIBCPP_INLINE_VISIBILITY bool operator==(const path& __lhs, | 
 |                                                  const path& __rhs) noexcept { | 
 |   return __lhs.compare(__rhs) == 0; | 
 | } | 
 |  | 
 | inline _LIBCPP_INLINE_VISIBILITY bool operator!=(const path& __lhs, | 
 |                                                  const path& __rhs) noexcept { | 
 |   return __lhs.compare(__rhs) != 0; | 
 | } | 
 |  | 
 | inline _LIBCPP_INLINE_VISIBILITY bool operator<(const path& __lhs, | 
 |                                                 const path& __rhs) noexcept { | 
 |   return __lhs.compare(__rhs) < 0; | 
 | } | 
 |  | 
 | inline _LIBCPP_INLINE_VISIBILITY bool operator<=(const path& __lhs, | 
 |                                                  const path& __rhs) noexcept { | 
 |   return __lhs.compare(__rhs) <= 0; | 
 | } | 
 |  | 
 | inline _LIBCPP_INLINE_VISIBILITY bool operator>(const path& __lhs, | 
 |                                                 const path& __rhs) noexcept { | 
 |   return __lhs.compare(__rhs) > 0; | 
 | } | 
 |  | 
 | inline _LIBCPP_INLINE_VISIBILITY bool operator>=(const path& __lhs, | 
 |                                                  const path& __rhs) noexcept { | 
 |   return __lhs.compare(__rhs) >= 0; | 
 | } | 
 |  | 
 | inline _LIBCPP_INLINE_VISIBILITY path operator/(const path& __lhs, | 
 |                                                 const path& __rhs) { | 
 |   path __result(__lhs); | 
 |   __result /= __rhs; | 
 |   return __result; | 
 | } | 
 |  | 
 | 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 |