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Diffstat (limited to 'include/experimental/filesystem')
| -rw-r--r-- | include/experimental/filesystem | 2052 |
1 files changed, 2052 insertions, 0 deletions
diff --git a/include/experimental/filesystem b/include/experimental/filesystem new file mode 100644 index 000000000000..7de93fdf8f15 --- /dev/null +++ b/include/experimental/filesystem @@ -0,0 +1,2052 @@ +// -*- 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_EXPERIMENTAL_FILESYSTEM +#define _LIBCPP_EXPERIMENTAL_FILESYSTEM +/* + filesystem synopsis + + namespace std { namespace experimental { namespace filesystem { inline namespace v1 { + + 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); + + template <class charT, class traits> + basic_ostream<charT, traits>& + operator<<(basic_ostream<charT, traits>& os, const path& p); + + template <class charT, class traits> + 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 copy_options; + enum class directory_options; + + typedef chrono::time_point<trivial-clock> file_time_type; + + // operational functions + + path absolute(const path& p, const path& base=current_path()); + + path canonical(const path& p, const path& base = current_path()); + path canonical(const path& p, error_code& ec); + path canonical(const path& p, const path& base, error_code& ec); + + void copy(const path& from, const path& to); + void copy(const path& from, const path& to, error_code& ec) _NOEXCEPT; + 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) _NOEXCEPT; + + bool copy_file(const path& from, const path& to); + bool copy_file(const path& from, const path& to, error_code& ec) _NOEXCEPT; + 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) _NOEXCEPT; + + 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) _NOEXCEPT; + + 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); + void permissions(const path& p, perms prms, error_code& ec) _NOEXCEPT; + + path read_symlink(const path& p); + path read_symlink(const path& p, 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) _NOEXCEPT; + + 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 system_complete(const path& p); + path system_complete(const path& p, error_code& ec); + + path temp_directory_path(); + path temp_directory_path(error_code& ec); + +} } } } // namespaces std::experimental::filesystem::v1 + +*/ + +#include <experimental/__config> +#include <cstddef> +#include <chrono> +#include <iterator> +#include <iosfwd> +#include <locale> +#include <memory> +#include <stack> +#include <string> +#include <system_error> +#include <utility> +#include <iomanip> // for quoted +#include <experimental/string_view> + +#include <__debug> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +#define __cpp_lib_experimental_filesystem 201406 + +_LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL_FILESYSTEM + +typedef chrono::time_point<std::chrono::system_clock> file_time_type; + +struct _LIBCPP_TYPE_VIS space_info +{ + uintmax_t capacity; + uintmax_t free; + uintmax_t available; +}; + +enum class _LIBCPP_TYPE_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_TYPE_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, + + add_perms = 0x10000, + remove_perms = 0x20000, + symlink_nofollow = 0x40000 +}; + +_LIBCPP_INLINE_VISIBILITY +inline _LIBCPP_CONSTEXPR perms operator&(perms _LHS, perms _RHS) +{ return static_cast<perms>(static_cast<unsigned>(_LHS) & static_cast<unsigned>(_RHS)); } + +_LIBCPP_INLINE_VISIBILITY +inline _LIBCPP_CONSTEXPR perms operator|(perms _LHS, perms _RHS) +{ return static_cast<perms>(static_cast<unsigned>(_LHS) | static_cast<unsigned>(_RHS)); } + +_LIBCPP_INLINE_VISIBILITY +inline _LIBCPP_CONSTEXPR perms operator^(perms _LHS, perms _RHS) +{ return static_cast<perms>(static_cast<unsigned>(_LHS) ^ static_cast<unsigned>(_RHS)); } + +_LIBCPP_INLINE_VISIBILITY +inline _LIBCPP_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_TYPE_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 _LIBCPP_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 _LIBCPP_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 _LIBCPP_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 _LIBCPP_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 directory_options : unsigned char +{ + none = 0, + follow_directory_symlink = 1, + skip_permission_denied = 2 +}; + +_LIBCPP_INLINE_VISIBILITY +inline _LIBCPP_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 _LIBCPP_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 _LIBCPP_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 _LIBCPP_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 + explicit file_status(file_type __ft = file_type::none, + 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_ALWAYS_INLINE + file_type type() const _NOEXCEPT { + return __ft_; + } + + _LIBCPP_ALWAYS_INLINE + perms permissions() const _NOEXCEPT { + return __prms_; + } + + // modifiers + _LIBCPP_ALWAYS_INLINE + void type(file_type __ft) _NOEXCEPT { + __ft_ = __ft; + } + + _LIBCPP_ALWAYS_INLINE + 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 <> 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 _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 void __append_range(string& __dest, _Iter __b, _Iter __e) { + for (; __b != __e; ++__b) + __dest.push_back(*__b); + } + + 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; + static _LIBCPP_CONSTEXPR value_type preferred_separator = '/'; + + // 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) _NOEXCEPT : __pn_(_VSTD::move(__s)) {} + + template < + class _Source, + class = _EnableIfPathable<_Source, void> + > + path(const _Source& __src) { + _SourceCVT<_Source>::__append_source(__pn_, __src); + } + + template <class _InputIt> + path(_InputIt __first, _InputIt __last) { + 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); + template <class _InputIt> + path(_InputIt __first, _InputIt _last, const locale& __loc); + + _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; + } + + _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> + void __append_sep_if_needed(_ECharT __first_or_null) { + const _ECharT __null_val = {}; + bool __append_sep = !empty() && + !__is_separator(__pn_.back()) && + __first_or_null != __null_val && // non-empty + !__is_separator(__first_or_null); + if (__append_sep) + __pn_ += preferred_separator; + } + +public: + // appends + path& operator/=(const path& __p) { + __append_sep_if_needed(__p.empty() ? char{} : __p.__pn_[0]); + __pn_ += __p.native(); + return *this; + } + + 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>>; + __append_sep_if_needed(_Traits::__first_or_null(__src)); + _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) { + __append_sep_if_needed(*__first); + _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+=(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; } + path& remove_filename() { return *this = parent_path(); } + + 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_); + } + + // 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: + _LIBCPP_FUNC_VIS int __compare(const value_type*) const; + _LIBCPP_FUNC_VIS string_view __root_name() const; + _LIBCPP_FUNC_VIS string_view __root_directory() const; + _LIBCPP_FUNC_VIS string_view __relative_path() const; + _LIBCPP_FUNC_VIS string_view __parent_path() const; + _LIBCPP_FUNC_VIS string_view __filename() const; + _LIBCPP_FUNC_VIS string_view __stem() const; + _LIBCPP_FUNC_VIS string_view __extension() const; + +public: + // compare + _LIBCPP_INLINE_VISIBILITY int compare(const path& __p) const _NOEXCEPT { return __compare(__p.c_str());} + _LIBCPP_INLINE_VISIBILITY int compare(const string_type& __s) const { return __compare(__s.c_str()); } + _LIBCPP_INLINE_VISIBILITY int compare(const value_type* __s) const { return __compare(__s); } + + // decomposition + _LIBCPP_INLINE_VISIBILITY path root_name() const { return __root_name().to_string(); } + _LIBCPP_INLINE_VISIBILITY path root_directory() const { return __root_directory().to_string(); } + _LIBCPP_INLINE_VISIBILITY path root_path() const { return root_name().append(__root_directory().to_string()); } + _LIBCPP_INLINE_VISIBILITY path relative_path() const { return __relative_path().to_string(); } + _LIBCPP_INLINE_VISIBILITY path parent_path() const { return __parent_path().to_string(); } + _LIBCPP_INLINE_VISIBILITY path filename() const { return __filename().to_string(); } + _LIBCPP_INLINE_VISIBILITY path stem() const { return __stem().to_string();} + _LIBCPP_INLINE_VISIBILITY path extension() const { return __extension().to_string(); } + + // query + _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_name().empty() && __root_directory().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(); } + + // iterators + class _LIBCPP_TYPE_VIS iterator; + typedef iterator const_iterator; + + _LIBCPP_FUNC_VIS iterator begin() const; + _LIBCPP_FUNC_VIS iterator end() const; + +private: + inline _LIBCPP_INLINE_VISIBILITY + path& __assign_view(string_view const& __s) noexcept { __pn_ = __s.to_string(); return *this; } + string_type __pn_; +}; + +inline _LIBCPP_ALWAYS_INLINE +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) { + return path(__lhs) /= __rhs; +} + +template <class _CharT, class _Traits> +_LIBCPP_INLINE_VISIBILITY +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 +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 +basic_istream<_CharT, _Traits>& +operator>>(basic_istream<_CharT, _Traits>& __is, path& __p) +{ + basic_string<_CharT, _Traits> __tmp; + __is >> __quoted(__tmp); + __p = __tmp; + return __is; +} + +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: + typedef bidirectional_iterator_tag iterator_category; + typedef path value_type; + typedef std::ptrdiff_t difference_type; + typedef const path* pointer; + typedef const path& reference; +public: + _LIBCPP_INLINE_VISIBILITY + iterator() : __elem_(), __path_ptr_(nullptr), __pos_(0) {} + + iterator(const iterator&) = default; + ~iterator() = default; + + iterator& operator=(const iterator&) = default; + + _LIBCPP_INLINE_VISIBILITY + reference operator*() const { + return __elem_; + } + + _LIBCPP_INLINE_VISIBILITY + pointer operator->() const { + return &__elem_; + } + + _LIBCPP_INLINE_VISIBILITY + iterator& operator++() { + return __increment(); + } + + _LIBCPP_INLINE_VISIBILITY + iterator operator++(int) { + iterator __it(*this); + this->operator++(); + return __it; + } + + _LIBCPP_INLINE_VISIBILITY + iterator& operator--() { + return __decrement(); + } + + _LIBCPP_INLINE_VISIBILITY + iterator operator--(int) { + iterator __it(*this); + this->operator--(); + return __it; + } + +private: + friend class path; + friend bool operator==(const iterator&, const iterator&); + + _LIBCPP_FUNC_VIS iterator& __increment(); + _LIBCPP_FUNC_VIS iterator& __decrement(); + + path __elem_; + const path* __path_ptr_; + size_t __pos_; +}; + +inline _LIBCPP_INLINE_VISIBILITY +bool operator==(const path::iterator& __lhs, const path::iterator& __rhs) { + return __lhs.__path_ptr_ == __rhs.__path_ptr_ && + __lhs.__pos_ == __rhs.__pos_; +} + +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), + __paths_(make_shared<_Storage>(path(), path())) + {} + + _LIBCPP_INLINE_VISIBILITY + filesystem_error(const string& __what, const path& __p1, error_code __ec) + : system_error(__ec, __what), + __paths_(make_shared<_Storage>(__p1, path())) + {} + + _LIBCPP_INLINE_VISIBILITY + filesystem_error(const string& __what, const path& __p1, const path& __p2, + error_code __ec) + : system_error(__ec, __what), + __paths_(make_shared<_Storage>(__p1, __p2)) + {} + + _LIBCPP_INLINE_VISIBILITY + const path& path1() const _NOEXCEPT { + return __paths_->first; + } + + _LIBCPP_INLINE_VISIBILITY + const path& path2() const _NOEXCEPT { + return __paths_->second; + } + + _LIBCPP_FUNC_VIS + ~filesystem_error() override; // key function + + // TODO(ericwf): Create a custom error message. + //const char* what() const _NOEXCEPT; + +private: + typedef pair<path, path> _Storage; + shared_ptr<_Storage> __paths_; +}; + +// operational functions + +_LIBCPP_FUNC_VIS +path __canonical(const path&, 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& p, perms prms, error_code *ec=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); + +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); +} + +_LIBCPP_FUNC_VIS +path absolute(const path&, const path& __p2 = current_path()); + +inline _LIBCPP_INLINE_VISIBILITY +path canonical(const path& __p, const path& __base = current_path()) { + return __canonical(__p, __base); +} + +inline _LIBCPP_INLINE_VISIBILITY +path canonical(const path& __p, error_code& __ec) { + path __base = __current_path(&__ec); + if (__ec) return {}; + return __canonical(__p, __base, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY +path canonical(const path& __p, const path& __base, error_code& __ec) { + return __canonical(__p, __base, &__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) _NOEXCEPT { + __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) _NOEXCEPT { + __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) _NOEXCEPT { + 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) _NOEXCEPT { + 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) _NOEXCEPT { + 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) _NOEXCEPT { + 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) { + __permissions(__p, __prms); +} + +inline _LIBCPP_INLINE_VISIBILITY +void permissions(const path& __p, perms __prms, error_code& __ec) { + __permissions(__p, __prms, &__ec); +} + +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 +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) _NOEXCEPT { + 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 system_complete(const path& __p) { + return __system_complete(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY +path system_complete(const path& __p, error_code& __ec) { + return __system_complete(__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); +} + + +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) {} + + ~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; + } + + _LIBCPP_INLINE_VISIBILITY + void replace_filename(_Path const& __p) { + __p_ = __p_.parent_path() / __p; + } + + _LIBCPP_INLINE_VISIBILITY + _Path const& path() const _NOEXCEPT { + return __p_; + } + + _LIBCPP_INLINE_VISIBILITY + operator const _Path&() const _NOEXCEPT { + return __p_; + } + + _LIBCPP_INLINE_VISIBILITY + file_status status() const { + return _VSTD_FS::status(__p_); + } + + _LIBCPP_INLINE_VISIBILITY + file_status status(error_code& __ec) const _NOEXCEPT { + return _VSTD_FS::status(__p_, __ec); + } + + _LIBCPP_INLINE_VISIBILITY + file_status symlink_status() const { + return _VSTD_FS::symlink_status(__p_); + } + + _LIBCPP_INLINE_VISIBILITY + file_status symlink_status(error_code& __ec) const _NOEXCEPT { + return _VSTD_FS::symlink_status(__p_, __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: + _Path __p_; +}; + + +class directory_iterator; +class recursive_directory_iterator; +class __dir_stream; + +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) _NOEXCEPT + : directory_iterator(__p, &__ec) + { } + + directory_iterator(const path& __p, directory_options __opts, + error_code& __ec) _NOEXCEPT + : 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 __deref(); + } + + 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) _NOEXCEPT + { return __increment(&__ec); } + +private: + 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& __deref() 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) _NOEXCEPT + : recursive_directory_iterator(__p, __xoptions, &__ec) + { } + + _LIBCPP_INLINE_VISIBILITY + recursive_directory_iterator(const path& __p, error_code& __ec) _NOEXCEPT + : 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 __deref(); } + + _LIBCPP_INLINE_VISIBILITY + const directory_entry* operator->() const + { return &__deref(); } + + 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) _NOEXCEPT + { 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& __deref() 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); + + 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 + + +_LIBCPP_INLINE_VISIBILITY +inline 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_EXPERIMENTAL_FILESYSTEM + +#endif // _LIBCPP_EXPERIMENTAL_FILESYSTEM |