libstdc++
experimental/bits/fs_path.h
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1// Class filesystem::path -*- C++ -*-
2
3// Copyright (C) 2014-2023 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library. This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14// GNU General Public License for more details.
15
16// Under Section 7 of GPL version 3, you are granted additional
17// permissions described in the GCC Runtime Library Exception, version
18// 3.1, as published by the Free Software Foundation.
19
20// You should have received a copy of the GNU General Public License and
21// a copy of the GCC Runtime Library Exception along with this program;
22// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23// <http://www.gnu.org/licenses/>.
24
25/** @file experimental/bits/fs_path.h
26 * This is an internal header file, included by other library headers.
27 * Do not attempt to use it directly. @headername{experimental/filesystem}
28 */
29
30#ifndef _GLIBCXX_EXPERIMENTAL_FS_PATH_H
31#define _GLIBCXX_EXPERIMENTAL_FS_PATH_H 1
32
33#if __cplusplus < 201103L
34# include <bits/c++0x_warning.h>
35#else
36
37#include <utility>
38#include <type_traits>
39#include <vector>
40#include <locale>
41#include <iosfwd>
42#include <codecvt>
43#include <system_error>
44#include <bits/stl_algobase.h>
45#include <bits/quoted_string.h>
46#include <bits/locale_conv.h>
47#if __cplusplus == 201402L
48# include <experimental/string_view>
49#endif
50
51#if defined(_WIN32) && !defined(__CYGWIN__)
52# define _GLIBCXX_FILESYSTEM_IS_WINDOWS 1
53# include <algorithm>
54#endif
55
56namespace std _GLIBCXX_VISIBILITY(default)
57{
58_GLIBCXX_BEGIN_NAMESPACE_VERSION
59
60namespace experimental
61{
62namespace filesystem
63{
64inline namespace v1
65{
66_GLIBCXX_BEGIN_NAMESPACE_CXX11
67
68#if __cplusplus == 201402L
69 using std::experimental::basic_string_view;
70#elif __cplusplus > 201402L
71 using std::basic_string_view;
72#endif
73
74 /// @cond undocumented
75namespace __detail
76{
77 /** @addtogroup filesystem-ts
78 * @{
79 */
80
81 template<typename _CharT,
82 typename _Ch = typename remove_const<_CharT>::type>
83 using __is_encoded_char
84 = __or_<is_same<_Ch, char>,
85 is_same<_Ch, wchar_t>,
86#ifdef _GLIBCXX_USE_CHAR8_T
87 is_same<_Ch, char8_t>,
88#endif
89 is_same<_Ch, char16_t>,
90 is_same<_Ch, char32_t>>;
91
92 template<typename _Iter,
93 typename _Iter_traits = std::iterator_traits<_Iter>>
94 using __is_path_iter_src
95 = __and_<__is_encoded_char<typename _Iter_traits::value_type>,
96 std::is_base_of<std::input_iterator_tag,
97 typename _Iter_traits::iterator_category>>;
98
99 template<typename _Iter>
100 static __is_path_iter_src<_Iter>
101 __is_path_src(_Iter, int);
102
103 template<typename _CharT, typename _Traits, typename _Alloc>
104 static __is_encoded_char<_CharT>
105 __is_path_src(const basic_string<_CharT, _Traits, _Alloc>&, int);
106
107#if __cplusplus >= 201402L
108 template<typename _CharT, typename _Traits>
109 static __is_encoded_char<_CharT>
110 __is_path_src(const basic_string_view<_CharT, _Traits>&, int);
111#endif
112
113 template<typename _Unknown>
114 static std::false_type
115 __is_path_src(const _Unknown&, ...);
116
117 template<typename _Tp1, typename _Tp2>
118 struct __constructible_from;
119
120 template<typename _Iter>
121 struct __constructible_from<_Iter, _Iter>
122 : __is_path_iter_src<_Iter>
123 { };
124
125 template<typename _Source>
126 struct __constructible_from<_Source, void>
127 : decltype(__is_path_src(std::declval<const _Source&>(), 0))
128 { };
129
130 template<typename _Tp1, typename _Tp2 = void,
131 typename _Tp1_nocv = typename remove_cv<_Tp1>::type,
132 typename _Tp1_noptr = typename remove_pointer<_Tp1>::type>
133 using _Path = typename
134 std::enable_if<__and_<__not_<is_same<_Tp1_nocv, path>>,
135 __not_<is_void<_Tp1_noptr>>,
136 __constructible_from<_Tp1, _Tp2>>::value,
137 path>::type;
138
139 template<typename _Source>
140 inline _Source
141 _S_range_begin(_Source __begin) { return __begin; }
142
143 struct __nul_terminated { };
144
145 template<typename _Source>
146 inline __nul_terminated
147 _S_range_end(_Source) { return {}; }
148
149 template<typename _CharT, typename _Traits, typename _Alloc>
150 inline const _CharT*
151 _S_range_begin(const basic_string<_CharT, _Traits, _Alloc>& __str)
152 { return __str.data(); }
153
154 template<typename _CharT, typename _Traits, typename _Alloc>
155 inline const _CharT*
156 _S_range_end(const basic_string<_CharT, _Traits, _Alloc>& __str)
157 { return __str.data() + __str.size(); }
158
159#if __cplusplus >= 201402L
160 template<typename _CharT, typename _Traits>
161 inline const _CharT*
162 _S_range_begin(const basic_string_view<_CharT, _Traits>& __str)
163 { return __str.data(); }
164
165 template<typename _CharT, typename _Traits>
166 inline const _CharT*
167 _S_range_end(const basic_string_view<_CharT, _Traits>& __str)
168 { return __str.data() + __str.size(); }
169#endif
170
171 template<typename _Tp,
172 typename _Iter = decltype(_S_range_begin(std::declval<_Tp>())),
173 typename _Val = typename std::iterator_traits<_Iter>::value_type,
174 typename _UnqualVal = typename std::remove_const<_Val>::type>
175 using __value_type_is_char = typename std::enable_if<
176 std::is_same<_UnqualVal, char>::value,
177 _UnqualVal>::type;
178
179 template<typename _Tp,
180 typename _Iter = decltype(_S_range_begin(std::declval<_Tp>())),
181 typename _Val = typename std::iterator_traits<_Iter>::value_type,
182 typename _UnqualVal = typename std::remove_const<_Val>::type>
183 using __value_type_is_char_or_char8_t = typename std::enable_if<
184 __or_<
185 std::is_same<_UnqualVal, char>
186#ifdef _GLIBCXX_USE_CHAR8_T
187 ,std::is_same<_UnqualVal, char8_t>
188#endif
189 >::value, _UnqualVal>::type;
190
191 /// @} group filesystem-ts
192} // namespace __detail
193 /// @endcond
194
195 /** @addtogroup filesystem-ts
196 * @{
197 */
198
199 /// A filesystem path.
200 /// @ingroup filesystem-ts
201 class path
202 {
203 public:
204#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
205 typedef wchar_t value_type;
206 static constexpr value_type preferred_separator = L'\\';
207#else
208 typedef char value_type;
209 static constexpr value_type preferred_separator = '/';
210#endif
211 typedef std::basic_string<value_type> string_type;
212
213 // constructors and destructor
214
215 path() noexcept;
216 path(const path& __p);
217 path(path&& __p) noexcept;
218
219 path(string_type&& __source);
220
221 template<typename _Source,
222 typename _Require = __detail::_Path<_Source>>
223 path(_Source const& __source)
224 : _M_pathname(_S_convert(__detail::_S_range_begin(__source),
225 __detail::_S_range_end(__source)))
226 { _M_split_cmpts(); }
227
228 template<typename _InputIterator,
229 typename _Require = __detail::_Path<_InputIterator, _InputIterator>>
230 path(_InputIterator __first, _InputIterator __last)
231 : _M_pathname(_S_convert(__first, __last))
232 { _M_split_cmpts(); }
233
234 template<typename _Source,
235 typename _Require = __detail::_Path<_Source>,
236 typename _Require2 = __detail::__value_type_is_char<_Source>>
237 path(_Source const& __source, const locale& __loc)
238 : _M_pathname(_S_convert_loc(__detail::_S_range_begin(__source),
239 __detail::_S_range_end(__source), __loc))
240 { _M_split_cmpts(); }
241
242 template<typename _InputIterator,
243 typename _Require = __detail::_Path<_InputIterator, _InputIterator>,
244 typename _Require2 = __detail::__value_type_is_char<_InputIterator>>
245 path(_InputIterator __first, _InputIterator __last, const locale& __loc)
246 : _M_pathname(_S_convert_loc(__first, __last, __loc))
247 { _M_split_cmpts(); }
248
249 ~path();
250
251 // assignments
252
253 path& operator=(const path& __p);
254 path& operator=(path&& __p) noexcept;
255 path& operator=(string_type&& __source);
256 path& assign(string_type&& __source);
257
258 template<typename _Source>
259 __detail::_Path<_Source>&
260 operator=(_Source const& __source)
261 { return *this = path(__source); }
262
263 template<typename _Source>
264 __detail::_Path<_Source>&
265 assign(_Source const& __source)
266 { return *this = path(__source); }
267
268 template<typename _InputIterator>
269 __detail::_Path<_InputIterator, _InputIterator>&
270 assign(_InputIterator __first, _InputIterator __last)
271 { return *this = path(__first, __last); }
272
273 // appends
274
275 path& operator/=(const path& __p) { return _M_append(__p._M_pathname); }
276
277 template<typename _Source>
278 __detail::_Path<_Source>&
279 operator/=(_Source const& __source)
280 { return append(__source); }
281
282 template<typename _Source>
283 __detail::_Path<_Source>&
284 append(_Source const& __source)
285 {
286 return _M_append(_S_convert(__detail::_S_range_begin(__source),
287 __detail::_S_range_end(__source)));
288 }
289
290 template<typename _InputIterator>
291 __detail::_Path<_InputIterator, _InputIterator>&
292 append(_InputIterator __first, _InputIterator __last)
293 { return _M_append(_S_convert(__first, __last)); }
294
295 // concatenation
296
297 path& operator+=(const path& __x);
298 path& operator+=(const string_type& __x);
299 path& operator+=(const value_type* __x);
300 path& operator+=(value_type __x);
301#if __cplusplus >= 201402L
302 path& operator+=(basic_string_view<value_type> __x);
303#endif
304
305 template<typename _Source>
306 __detail::_Path<_Source>&
307 operator+=(_Source const& __x) { return concat(__x); }
308
309 template<typename _CharT>
310 __detail::_Path<_CharT*, _CharT*>&
311 operator+=(_CharT __x);
312
313 template<typename _Source>
314 __detail::_Path<_Source>&
315 concat(_Source const& __x)
316 {
317 return *this += _S_convert(__detail::_S_range_begin(__x),
318 __detail::_S_range_end(__x));
319 }
320
321 template<typename _InputIterator>
322 __detail::_Path<_InputIterator, _InputIterator>&
323 concat(_InputIterator __first, _InputIterator __last)
324 { return *this += _S_convert(__first, __last); }
325
326 // modifiers
327
328 void clear() noexcept { _M_pathname.clear(); _M_split_cmpts(); }
329
330 path& make_preferred();
331 path& remove_filename();
332 path& replace_filename(const path& __replacement);
333 path& replace_extension(const path& __replacement = path());
334
335 void swap(path& __rhs) noexcept;
336
337 // native format observers
338
339 const string_type& native() const noexcept { return _M_pathname; }
340 const value_type* c_str() const noexcept { return _M_pathname.c_str(); }
341 operator string_type() const { return _M_pathname; }
342
343 template<typename _CharT, typename _Traits = std::char_traits<_CharT>,
344 typename _Allocator = std::allocator<_CharT>>
345 std::basic_string<_CharT, _Traits, _Allocator>
346 string(const _Allocator& __a = _Allocator()) const;
347
348 std::string string() const;
349#if _GLIBCXX_USE_WCHAR_T
350 std::wstring wstring() const;
351#endif
352#ifdef _GLIBCXX_USE_CHAR8_T
353 __attribute__((__abi_tag__("__u8")))
354 std::u8string u8string() const;
355#else
356 std::string u8string() const;
357#endif // _GLIBCXX_USE_CHAR8_T
358 std::u16string u16string() const;
359 std::u32string u32string() const;
360
361 // generic format observers
362 template<typename _CharT, typename _Traits = std::char_traits<_CharT>,
363 typename _Allocator = std::allocator<_CharT>>
364 std::basic_string<_CharT, _Traits, _Allocator>
365 generic_string(const _Allocator& __a = _Allocator()) const;
366
367 std::string generic_string() const;
368#if _GLIBCXX_USE_WCHAR_T
369 std::wstring generic_wstring() const;
370#endif
371#ifdef _GLIBCXX_USE_CHAR8_T
372 __attribute__((__abi_tag__("__u8")))
373 std::u8string generic_u8string() const;
374#else
375 std::string generic_u8string() const;
376#endif // _GLIBCXX_USE_CHAR8_T
377 std::u16string generic_u16string() const;
378 std::u32string generic_u32string() const;
379
380 // compare
381
382 int compare(const path& __p) const noexcept;
383 int compare(const string_type& __s) const;
384 int compare(const value_type* __s) const;
385#if __cplusplus >= 201402L
386 int compare(const basic_string_view<value_type> __s) const;
387#endif
388
389 // decomposition
390
391 path root_name() const;
392 path root_directory() const;
393 path root_path() const;
394 path relative_path() const;
395 path parent_path() const;
396 path filename() const;
397 path stem() const;
398 path extension() const;
399
400 // query
401
402 _GLIBCXX_NODISCARD bool empty() const noexcept { return _M_pathname.empty(); }
403 bool has_root_name() const;
404 bool has_root_directory() const;
405 bool has_root_path() const;
406 bool has_relative_path() const;
407 bool has_parent_path() const;
408 bool has_filename() const;
409 bool has_stem() const;
410 bool has_extension() const;
411 bool is_absolute() const;
412 bool is_relative() const { return !is_absolute(); }
413
414 // iterators
415 class iterator;
416 typedef iterator const_iterator;
417
418 iterator begin() const noexcept;
419 iterator end() const noexcept;
420
421 /// @cond undocumented
422 // Create a basic_string by reading until a null character.
423 template<typename _InputIterator,
424 typename _Traits = std::iterator_traits<_InputIterator>,
425 typename _CharT
426 = typename std::remove_cv<typename _Traits::value_type>::type>
427 static std::basic_string<_CharT>
428 _S_string_from_iter(_InputIterator __source)
429 {
430 std::basic_string<_CharT> __str;
431 for (_CharT __ch = *__source; __ch != _CharT(); __ch = *++__source)
432 __str.push_back(__ch);
433 return __str;
434 }
435 /// @endcond
436
437 private:
438 enum class _Type : unsigned char {
439 _Multi, _Root_name, _Root_dir, _Filename
440 };
441
442 path(string_type __str, _Type __type);
443
444 enum class _Split { _Stem, _Extension };
445
446 path& _M_append(const string_type& __str)
447 {
448 if (!_M_pathname.empty() && !_S_is_dir_sep(_M_pathname.back())
449 && !__str.empty() && !_S_is_dir_sep(__str.front()))
450 _M_pathname += preferred_separator;
451 _M_pathname += __str;
452 _M_split_cmpts();
453 return *this;
454 }
455
456 pair<const string_type*, size_t> _M_find_extension() const;
457
458 template<typename _CharT>
459 struct _Cvt;
460
461 static string_type
462 _S_convert(value_type* __src, __detail::__nul_terminated)
463 { return string_type(__src); }
464
465 static string_type
466 _S_convert(const value_type* __src, __detail::__nul_terminated)
467 { return string_type(__src); }
468
469 template<typename _Iter>
470 static string_type
471 _S_convert(_Iter __first, _Iter __last)
472 {
473 using __value_type = typename std::iterator_traits<_Iter>::value_type;
474 return _Cvt<typename remove_cv<__value_type>::type>::
475 _S_convert(__first, __last);
476 }
477
478 template<typename _InputIterator>
479 static string_type
480 _S_convert(_InputIterator __src, __detail::__nul_terminated)
481 {
482 auto __s = _S_string_from_iter(__src);
483 return _S_convert(__s.c_str(), __s.c_str() + __s.size());
484 }
485
486 static string_type
487 _S_convert_loc(const char* __first, const char* __last,
488 const std::locale& __loc);
489
490 static string_type
491 _S_convert_loc(char* __first, char* __last, const std::locale& __loc)
492 {
493 return _S_convert_loc(const_cast<const char*>(__first),
494 const_cast<const char*>(__last), __loc);
495 }
496
497 template<typename _Iter>
498 static string_type
499 _S_convert_loc(_Iter __first, _Iter __last, const std::locale& __loc)
500 {
501 const std::string __str(__first, __last);
502 return _S_convert_loc(__str.data(), __str.data()+__str.size(), __loc);
503 }
504
505 template<typename _InputIterator>
506 static string_type
507 _S_convert_loc(_InputIterator __src, __detail::__nul_terminated,
508 const std::locale& __loc)
509 {
510 const std::string __s = _S_string_from_iter(__src);
511 return _S_convert_loc(__s.data(), __s.data() + __s.size(), __loc);
512 }
513
514 static bool _S_is_dir_sep(value_type __ch)
515 {
516#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
517 return __ch == L'/' || __ch == preferred_separator;
518#else
519 return __ch == '/';
520#endif
521 }
522
523 void _M_split_cmpts();
524 void _M_trim();
525 void _M_add_root_name(size_t __n);
526 void _M_add_root_dir(size_t __pos);
527 void _M_add_filename(size_t __pos, size_t __n);
528
529 string_type _M_pathname;
530
531 struct _Cmpt;
532 using _List = _GLIBCXX_STD_C::vector<_Cmpt>;
533 _List _M_cmpts; // empty unless _M_type == _Type::_Multi
534 _Type _M_type = _Type::_Multi;
535 };
536
537 /// @relates std::experimental::filesystem::path @{
538
539 /// Swap overload for paths
540 inline void swap(path& __lhs, path& __rhs) noexcept { __lhs.swap(__rhs); }
541
542 /// Compute a hash value for a path
543 size_t hash_value(const path& __p) noexcept;
544
545 /// Compare paths
546 inline bool operator<(const path& __lhs, const path& __rhs) noexcept;
547
548 /// Compare paths
549 inline bool operator<=(const path& __lhs, const path& __rhs) noexcept
550 { return !(__rhs < __lhs); }
551
552 /// Compare paths
553 inline bool operator>(const path& __lhs, const path& __rhs) noexcept
554 { return __rhs < __lhs; }
555
556 /// Compare paths
557 inline bool operator>=(const path& __lhs, const path& __rhs) noexcept
558 { return !(__lhs < __rhs); }
559
560 /// Compare paths
561 inline bool operator==(const path& __lhs, const path& __rhs) noexcept;
562
563 /// Compare paths
564 inline bool operator!=(const path& __lhs, const path& __rhs) noexcept
565 { return !(__lhs == __rhs); }
566
567 /// Append one path to another
568 inline path operator/(const path& __lhs, const path& __rhs)
569 {
570 path __result(__lhs);
571 __result /= __rhs;
572 return __result;
573 }
574
575 /// Write a path to a stream
576 template<typename _CharT, typename _Traits>
577 basic_ostream<_CharT, _Traits>&
578 operator<<(basic_ostream<_CharT, _Traits>& __os, const path& __p)
579 {
580 auto __tmp = __p.string<_CharT, _Traits>();
581 using __quoted_string
582 = std::__detail::_Quoted_string<decltype(__tmp)&, _CharT>;
583 __os << __quoted_string{__tmp, _CharT('"'), _CharT('\\')};
584 return __os;
585 }
586
587 /// Read a path from a stream
588 template<typename _CharT, typename _Traits>
589 basic_istream<_CharT, _Traits>&
590 operator>>(basic_istream<_CharT, _Traits>& __is, path& __p)
591 {
592 basic_string<_CharT, _Traits> __tmp;
593 using __quoted_string
594 = std::__detail::_Quoted_string<decltype(__tmp)&, _CharT>;
595 if (__is >> __quoted_string{ __tmp, _CharT('"'), _CharT('\\') })
596 __p = std::move(__tmp);
597 return __is;
598 }
599
600 /// Create a path from a UTF-8-encoded sequence of char
601#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
602 template<typename _InputIterator>
603 inline path
604 __u8path(_InputIterator __first, _InputIterator __last, char)
605 {
606 // XXX This assumes native wide encoding is UTF-16.
607 std::codecvt_utf8_utf16<path::value_type> __cvt;
608 path::string_type __tmp;
609 const std::string __u8str{__first, __last};
610 const char* const __ptr = __u8str.data();
611 if (__str_codecvt_in_all(__ptr, __ptr + __u8str.size(), __tmp, __cvt))
612 return path{ __tmp };
613 _GLIBCXX_THROW_OR_ABORT(filesystem_error(
614 "Cannot convert character sequence",
615 std::make_error_code(errc::illegal_byte_sequence)));
616 }
617
618#ifdef _GLIBCXX_USE_CHAR8_T
619 template<typename _InputIterator>
620 inline path
621 __u8path(_InputIterator __first, _InputIterator __last, char8_t)
622 {
623 return path{ __first, __last };
624 }
625#endif // _GLIBCXX_USE_CHAR8_T
626#endif // _GLIBCXX_FILESYSTEM_IS_WINDOWS
627
628 template<typename _InputIterator,
629 typename _Require = __detail::_Path<_InputIterator, _InputIterator>,
630 typename _CharT =
631 __detail::__value_type_is_char_or_char8_t<_InputIterator>>
632 inline path
633 u8path(_InputIterator __first, _InputIterator __last)
634 {
635#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
636 return __u8path(__first, __last, _CharT{});
637#else
638 return path{ __first, __last };
639#endif
640 }
641
642 /// Create a path from a UTF-8-encoded sequence of char
643#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
644 inline path
645 __u8path(const string& __s, char)
646 {
647 return filesystem::u8path(__s.data(), __s.data() + __s.size());
648 }
649
650 template<typename _Source>
651 inline __enable_if_t<is_convertible<const _Source&, string>::value, path>
652 __u8path(const _Source& __source, char)
653 {
654 std::string __s = __source;
655 return filesystem::u8path(__s.data(), __s.data() + __s.size());
656 }
657
658 template<typename _Source>
659 inline __enable_if_t<!is_convertible<const _Source&, string>::value, path>
660 __u8path(const _Source& __source, char)
661 {
662 std::string __s = path::_S_string_from_iter(__source);
663 return filesystem::u8path(__s.data(), __s.data() + __s.size());
664 }
665
666#ifdef _GLIBCXX_USE_CHAR8_T
667 template<typename _Source>
668 inline path
669 __u8path(const _Source& __source, char8_t)
670 {
671 return path{ __source };
672 }
673#endif // _GLIBCXX_USE_CHAR8_T
674#endif // _GLIBCXX_FILESYSTEM_IS_WINDOWS
675
676 template<typename _Source,
677 typename _Require = __detail::_Path<_Source>,
678 typename _CharT =
679 __detail::__value_type_is_char_or_char8_t<_Source>>
680 inline path
681 u8path(const _Source& __source)
682 {
683#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
684 return __u8path(__source, _CharT{});
685#else
686 return path{ __source };
687#endif
688 }
689
690 /// @}
691
692 /// Exception type thrown by the Filesystem TS library
693 class filesystem_error : public std::system_error
694 {
695 public:
696 filesystem_error(const string& __what_arg, error_code __ec)
697 : system_error(__ec, __what_arg) { }
698
699 filesystem_error(const string& __what_arg, const path& __p1,
700 error_code __ec)
701 : system_error(__ec, __what_arg), _M_path1(__p1) { }
702
703 filesystem_error(const string& __what_arg, const path& __p1,
704 const path& __p2, error_code __ec)
705 : system_error(__ec, __what_arg), _M_path1(__p1), _M_path2(__p2)
706 { }
707
708 ~filesystem_error();
709
710 const path& path1() const noexcept { return _M_path1; }
711 const path& path2() const noexcept { return _M_path2; }
712 const char* what() const noexcept { return _M_what.c_str(); }
713
714 private:
715 std::string _M_gen_what();
716
717 path _M_path1;
718 path _M_path2;
719 std::string _M_what = _M_gen_what();
720 };
721
722 /// @cond undocumented
723 struct path::_Cmpt : path
724 {
725 _Cmpt(string_type __s, _Type __t, size_t __pos)
726 : path(std::move(__s), __t), _M_pos(__pos) { }
727
728 _Cmpt() : _M_pos(-1) { }
729
730 size_t _M_pos;
731 };
732
733 // specialize _Cvt for degenerate 'noconv' case
734 template<>
735 struct path::_Cvt<path::value_type>
736 {
737 // We need this type to be defined because we don't have `if constexpr`
738 // in C++11 and so path::string<C,T,A>(const A&) needs to be able to
739 // declare a variable of this type and pass it to __str_codecvt_in_all.
740 using __codecvt_utf8_to_wide = _Cvt;
741 // Dummy overload used for unreachable calls in path::string<C,T,A>.
742 template<typename _WStr>
743 friend bool
744 __str_codecvt_in_all(const char*, const char*,
745 _WStr&, __codecvt_utf8_to_wide&) noexcept
746 { return true; }
747
748 template<typename _Iter>
749 static string_type
750 _S_convert(_Iter __first, _Iter __last)
751 { return string_type{__first, __last}; }
752 };
753
754 // Performs conversions from _CharT to path::string_type.
755 template<typename _CharT>
756 struct path::_Cvt
757 {
758 // FIXME: We currently assume that the native wide encoding for wchar_t
759 // is either UTF-32 or UTF-16 (depending on the width of wchar_t).
760 // See comments in <bits/fs_path.h> for further details.
761 using __codecvt_utf8_to_wchar
762 = __conditional_t<sizeof(wchar_t) == sizeof(char32_t),
763 std::codecvt_utf8<wchar_t>, // from UTF-32
764 std::codecvt_utf8_utf16<wchar_t>>; // from UTF-16
765
766 // Converts from char16_t or char32_t using std::codecvt<charNN_t, char>.
767 // Need derived class here because std::codecvt has protected destructor.
768 struct __codecvt_utf8_to_utfNN : std::codecvt<_CharT, char, mbstate_t>
769 { };
770
771 // Convert from native pathname format (assumed to be UTF-8 everywhere)
772 // to the encoding implied by the wide character type _CharT.
773 using __codecvt_utf8_to_wide
774 = __conditional_t<is_same<_CharT, wchar_t>::value,
775 __codecvt_utf8_to_wchar,
776 __codecvt_utf8_to_utfNN>;
777
778#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
779#ifdef _GLIBCXX_USE_CHAR8_T
780 static string_type
781 _S_wconvert(const char8_t* __f, const char8_t* __l, const char8_t*)
782 {
783 const char* __f2 = (const char*)__f;
784 const char* __l2 = (const char*)__l;
785 std::wstring __wstr;
786 std::codecvt_utf8_utf16<wchar_t> __wcvt;
787 if (__str_codecvt_in_all(__f2, __l2, __wstr, __wcvt))
788 return __wstr;
789 }
790#endif
791
792 static string_type
793 _S_wconvert(const char* __f, const char* __l, const char*)
794 {
795 std::codecvt_utf8_utf16<wchar_t> __cvt;
796 std::wstring __wstr;
797 if (__str_codecvt_in_all(__f, __l, __wstr, __cvt))
798 return __wstr;
799 _GLIBCXX_THROW_OR_ABORT(filesystem_error(
800 "Cannot convert character sequence",
801 std::make_error_code(errc::illegal_byte_sequence)));
802 }
803
804 static string_type
805 _S_wconvert(const _CharT* __f, const _CharT* __l, const void*)
806 {
807 __codecvt_utf8_to_wide __cvt;
808 std::string __str;
809 if (__str_codecvt_out_all(__f, __l, __str, __cvt))
810 {
811 const char* __f2 = __str.data();
812 const char* __l2 = __f2 + __str.size();
813 std::codecvt_utf8_utf16<wchar_t> __wcvt;
814 std::wstring __wstr;
815 if (__str_codecvt_in_all(__f2, __l2, __wstr, __wcvt))
816 return __wstr;
817 }
818 _GLIBCXX_THROW_OR_ABORT(filesystem_error(
819 "Cannot convert character sequence",
820 std::make_error_code(errc::illegal_byte_sequence)));
821 }
822
823 static string_type
824 _S_convert(const _CharT* __f, const _CharT* __l)
825 {
826 return _S_wconvert(__f, __l, (const _CharT*)nullptr);
827 }
828#else
829 static string_type
830 _S_convert(const _CharT* __f, const _CharT* __l)
831 {
832#ifdef _GLIBCXX_USE_CHAR8_T
833 if constexpr (is_same<_CharT, char8_t>::value)
834 return string_type(__f, __l);
835 else
836#endif
837 {
838 __codecvt_utf8_to_wide __cvt;
839 std::string __str;
840 if (__str_codecvt_out_all(__f, __l, __str, __cvt))
841 return __str;
842 _GLIBCXX_THROW_OR_ABORT(filesystem_error(
843 "Cannot convert character sequence",
844 std::make_error_code(errc::illegal_byte_sequence)));
845 }
846 }
847#endif
848
849 static string_type
850 _S_convert(_CharT* __f, _CharT* __l)
851 {
852 return _S_convert(const_cast<const _CharT*>(__f),
853 const_cast<const _CharT*>(__l));
854 }
855
856 template<typename _Iter>
857 static string_type
858 _S_convert(_Iter __first, _Iter __last)
859 {
860 const std::basic_string<_CharT> __str(__first, __last);
861 return _S_convert(__str.data(), __str.data() + __str.size());
862 }
863
864 template<typename _Iter, typename _Cont>
865 static string_type
866 _S_convert(__gnu_cxx::__normal_iterator<_Iter, _Cont> __first,
867 __gnu_cxx::__normal_iterator<_Iter, _Cont> __last)
868 { return _S_convert(__first.base(), __last.base()); }
869 };
870 /// @endcond
871
872 /// An iterator for the components of a path
873 class path::iterator
874 {
875 public:
876 using difference_type = std::ptrdiff_t;
877 using value_type = path;
878 using reference = const path&;
879 using pointer = const path*;
880 using iterator_category = std::bidirectional_iterator_tag;
881
882 iterator() noexcept : _M_path(nullptr), _M_cur(), _M_at_end() { }
883
884 iterator(const iterator&) = default;
885 iterator& operator=(const iterator&) = default;
886
887 reference operator*() const noexcept;
888 pointer operator->() const noexcept { return std::__addressof(**this); }
889
890 iterator& operator++() noexcept;
891
892 iterator operator++(int) noexcept
893 { auto __tmp = *this; ++*this; return __tmp; }
894
895 iterator& operator--() noexcept;
896
897 iterator operator--(int) noexcept
898 { auto __tmp = *this; --*this; return __tmp; }
899
900 friend bool
901 operator==(const iterator& __lhs, const iterator& __rhs) noexcept
902 { return __lhs._M_equals(__rhs); }
903
904 friend bool
905 operator!=(const iterator& __lhs, const iterator& __rhs) noexcept
906 { return !__lhs._M_equals(__rhs); }
907
908 private:
909 friend class path;
910
911 iterator(const path* __path, path::_List::const_iterator __iter) noexcept
912 : _M_path(__path), _M_cur(__iter), _M_at_end()
913 { }
914
915 iterator(const path* __path, bool __at_end) noexcept
916 : _M_path(__path), _M_cur(), _M_at_end(__at_end)
917 { }
918
919 bool _M_equals(iterator) const noexcept;
920
921 const path* _M_path;
922 path::_List::const_iterator _M_cur;
923 bool _M_at_end; // only used when type != _Multi
924 };
925
926 inline
927 path::path() noexcept = default;
928
929 inline
930 path::path(const path&) = default;
931
932 inline
933 path::path(path&& __p) noexcept
934 : _M_pathname(std::move(__p._M_pathname)),
935 _M_cmpts(__p._M_cmpts),
936 _M_type(__p._M_type)
937 { __p.clear(); }
938
939 inline
940 path::path(string_type&& __source)
941 : _M_pathname(std::move(__source))
942 { _M_split_cmpts(); }
943
944 inline
945 path::path(string_type __str, _Type __type)
946 : _M_pathname(__str), _M_type(__type)
947 {
948 __glibcxx_assert(!empty());
949 __glibcxx_assert(_M_type != _Type::_Multi);
950 }
951
952 inline
953 path::~path() = default;
954
955 inline path&
956 path::operator=(const path& __p) = default;
957
958 inline path&
959 path::operator=(path&& __p) noexcept
960 {
961 _M_pathname = std::move(__p._M_pathname);
962 _M_cmpts = std::move(__p._M_cmpts);
963 _M_type = __p._M_type;
964 __p.clear();
965 return *this;
966 }
967
968 inline path&
969 path::operator=(string_type&& __source)
970 { return *this = path(std::move(__source)); }
971
972 inline path&
973 path::assign(string_type&& __source)
974 { return *this = path(std::move(__source)); }
975
976 inline path&
977 path::operator+=(const path& __p)
978 {
979 return operator+=(__p.native());
980 }
981
982 inline path&
983 path::operator+=(const string_type& __x)
984 {
985 _M_pathname += __x;
986 _M_split_cmpts();
987 return *this;
988 }
989
990 inline path&
991 path::operator+=(const value_type* __x)
992 {
993 _M_pathname += __x;
994 _M_split_cmpts();
995 return *this;
996 }
997
998 inline path&
999 path::operator+=(value_type __x)
1000 {
1001 _M_pathname += __x;
1002 _M_split_cmpts();
1003 return *this;
1004 }
1005
1006#if __cplusplus >= 201402L
1007 inline path&
1008 path::operator+=(basic_string_view<value_type> __x)
1009 {
1010 _M_pathname.append(__x.data(), __x.size());
1011 _M_split_cmpts();
1012 return *this;
1013 }
1014#endif
1015
1016 template<typename _CharT>
1017 inline __detail::_Path<_CharT*, _CharT*>&
1018 path::operator+=(_CharT __x)
1019 {
1020 auto* __addr = std::__addressof(__x);
1021 return concat(__addr, __addr + 1);
1022 }
1023
1024 inline path&
1025 path::make_preferred()
1026 {
1027#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
1028 std::replace(_M_pathname.begin(), _M_pathname.end(), L'/',
1029 preferred_separator);
1030#endif
1031 return *this;
1032 }
1033
1034 inline void path::swap(path& __rhs) noexcept
1035 {
1036 _M_pathname.swap(__rhs._M_pathname);
1037 _M_cmpts.swap(__rhs._M_cmpts);
1038 std::swap(_M_type, __rhs._M_type);
1039 }
1040
1041 template<typename _CharT, typename _Traits, typename _Allocator>
1042 inline std::basic_string<_CharT, _Traits, _Allocator>
1043 path::string(const _Allocator& __a) const
1044 {
1045 if _GLIBCXX_CONSTEXPR (is_same<_CharT, value_type>::value)
1046 return { _M_pathname.begin(), _M_pathname.end(), __a };
1047
1048 using _WString = basic_string<_CharT, _Traits, _Allocator>;
1049
1050 const value_type* __first = _M_pathname.data();
1051 const value_type* __last = __first + _M_pathname.size();
1052
1053#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
1054 using _CharAlloc = __alloc_rebind<_Allocator, char>;
1055 using _String = basic_string<char, char_traits<char>, _CharAlloc>;
1056
1057 // First convert native string from UTF-16 to to UTF-8.
1058 // XXX This assumes that the execution wide-character set is UTF-16.
1059 codecvt_utf8_utf16<value_type> __cvt;
1060 _String __u8str{_CharAlloc{__a}};
1061 if (__str_codecvt_out_all(__first, __last, __u8str, __cvt))
1062 {
1063 struct
1064 {
1065 const _String*
1066 operator()(const _String& __from, _String&, true_type)
1067 { return std::__addressof(__from); }
1068
1069 _WString*
1070 operator()(const _String& __from, _WString& __to, false_type)
1071 {
1072#ifdef _GLIBCXX_USE_CHAR8_T
1073 if constexpr (is_same<_CharT, char8_t>::value)
1074 {
1075 __to.assign(__from.begin(), __from.end());
1076 return std::__addressof(__to);
1077 }
1078 else
1079#endif
1080 {
1081 // Convert UTF-8 to char16_t or char32_t string.
1082 typename path::_Cvt<_CharT>::__codecvt_utf8_to_wide __cvt;
1083 const char* __f = __from.data();
1084 const char* __l = __f + __from.size();
1085 if (__str_codecvt_in_all(__f, __l, __to, __cvt))
1086 return std::__addressof(__to);
1087 }
1088 return nullptr;
1089 }
1090 } __dispatch;
1091 _WString __wstr(__a);
1092 if (auto* __p = __dispatch(__u8str, __wstr, is_same<_CharT, char>{}))
1093 return *__p;
1094 }
1095#else // ! Windows
1096#ifdef _GLIBCXX_USE_CHAR8_T
1097 if constexpr (is_same<_CharT, char8_t>::value)
1098 return _WString(__first, __last, __a);
1099 else
1100#endif
1101 {
1102 typename path::_Cvt<_CharT>::__codecvt_utf8_to_wide __cvt;
1103 _WString __wstr(__a);
1104 if (__str_codecvt_in_all(__first, __last, __wstr, __cvt))
1105 return __wstr;
1106 }
1107#endif
1108 _GLIBCXX_THROW_OR_ABORT(filesystem_error(
1109 "Cannot convert character sequence",
1110 std::make_error_code(errc::illegal_byte_sequence)));
1111 }
1112
1113 inline std::string
1114 path::string() const { return string<char>(); }
1115
1116#if _GLIBCXX_USE_WCHAR_T
1117 inline std::wstring
1118 path::wstring() const { return string<wchar_t>(); }
1119#endif
1120
1121#ifdef _GLIBCXX_USE_CHAR8_T
1122 inline std::u8string
1123 path::u8string() const { return string<char8_t>(); }
1124#else
1125 inline std::string
1126 path::u8string() const
1127 {
1128#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
1129 std::string __str;
1130 // convert from native wide encoding (assumed to be UTF-16) to UTF-8
1131 std::codecvt_utf8_utf16<value_type> __cvt;
1132 const value_type* __first = _M_pathname.data();
1133 const value_type* __last = __first + _M_pathname.size();
1134 if (__str_codecvt_out_all(__first, __last, __str, __cvt))
1135 return __str;
1136 _GLIBCXX_THROW_OR_ABORT(filesystem_error(
1137 "Cannot convert character sequence",
1138 std::make_error_code(errc::illegal_byte_sequence)));
1139#else
1140 return _M_pathname;
1141#endif
1142 }
1143#endif // _GLIBCXX_USE_CHAR8_T
1144
1145 inline std::u16string
1146 path::u16string() const { return string<char16_t>(); }
1147
1148 inline std::u32string
1149 path::u32string() const { return string<char32_t>(); }
1150
1151 template<typename _CharT, typename _Traits, typename _Allocator>
1152 inline std::basic_string<_CharT, _Traits, _Allocator>
1153 path::generic_string(const _Allocator& __a) const
1154 {
1155#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
1156 const _CharT __slash = is_same<_CharT, wchar_t>::value
1157 ? _CharT(L'/')
1158 : _CharT('/'); // Assume value is correct for the encoding.
1159#else
1160 const _CharT __slash = _CharT('/');
1161#endif
1162 basic_string<_CharT, _Traits, _Allocator> __str(__a);
1163 __str.reserve(_M_pathname.size());
1164 bool __add_slash = false;
1165 for (auto& __elem : *this)
1166 {
1167 if (__elem._M_type == _Type::_Root_dir)
1168 {
1169 __str += __slash;
1170 continue;
1171 }
1172 if (__add_slash)
1173 __str += __slash;
1174 __str += __elem.string<_CharT, _Traits, _Allocator>(__a);
1175 __add_slash = __elem._M_type == _Type::_Filename;
1176 }
1177 return __str;
1178 }
1179
1180 inline std::string
1181 path::generic_string() const { return generic_string<char>(); }
1182
1183#if _GLIBCXX_USE_WCHAR_T
1184 inline std::wstring
1185 path::generic_wstring() const { return generic_string<wchar_t>(); }
1186#endif
1187
1188#ifdef _GLIBCXX_USE_CHAR8_T
1189 inline std::u8string
1190 path::generic_u8string() const { return generic_string<char8_t>(); }
1191#else
1192 inline std::string
1193 path::generic_u8string() const { return generic_string<char>(); }
1194#endif
1195
1196 inline std::u16string
1197 path::generic_u16string() const { return generic_string<char16_t>(); }
1198
1199 inline std::u32string
1200 path::generic_u32string() const { return generic_string<char32_t>(); }
1201
1202 inline int
1203 path::compare(const string_type& __s) const { return compare(path(__s)); }
1204
1205 inline int
1206 path::compare(const value_type* __s) const { return compare(path(__s)); }
1207
1208#if __cplusplus >= 201402L
1209 inline int
1210 path::compare(basic_string_view<value_type> __s) const
1211 { return compare(path(__s)); }
1212#endif
1213
1214 inline path
1215 path::filename() const { return empty() ? path() : *--end(); }
1216
1217 inline path
1218 path::stem() const
1219 {
1220 auto ext = _M_find_extension();
1221 if (ext.first && ext.second != 0)
1222 return path{ext.first->substr(0, ext.second)};
1223 return {};
1224 }
1225
1226 inline path
1227 path::extension() const
1228 {
1229 auto ext = _M_find_extension();
1230 if (ext.first && ext.second != string_type::npos)
1231 return path{ext.first->substr(ext.second)};
1232 return {};
1233 }
1234
1235 inline bool
1236 path::has_stem() const
1237 {
1238 auto ext = _M_find_extension();
1239 return ext.first && ext.second != 0;
1240 }
1241
1242 inline bool
1243 path::has_extension() const
1244 {
1245 auto ext = _M_find_extension();
1246 return ext.first && ext.second != string_type::npos;
1247 }
1248
1249 inline bool
1250 path::is_absolute() const
1251 {
1252#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
1253 return has_root_name() && has_root_directory();
1254#else
1255 return has_root_directory();
1256#endif
1257 }
1258
1259 inline path::iterator
1260 path::begin() const noexcept
1261 {
1262 if (_M_type == _Type::_Multi)
1263 return iterator(this, _M_cmpts.begin());
1264 return iterator(this, false);
1265 }
1266
1267 inline path::iterator
1268 path::end() const noexcept
1269 {
1270 if (_M_type == _Type::_Multi)
1271 return iterator(this, _M_cmpts.end());
1272 return iterator(this, true);
1273 }
1274
1275 inline path::iterator&
1276 path::iterator::operator++() noexcept
1277 {
1278 __glibcxx_assert(_M_path != nullptr);
1279 if (_M_path->_M_type == _Type::_Multi)
1280 {
1281 __glibcxx_assert(_M_cur != _M_path->_M_cmpts.end());
1282 ++_M_cur;
1283 }
1284 else
1285 {
1286 __glibcxx_assert(!_M_at_end);
1287 _M_at_end = true;
1288 }
1289 return *this;
1290 }
1291
1292 inline path::iterator&
1293 path::iterator::operator--() noexcept
1294 {
1295 __glibcxx_assert(_M_path != nullptr);
1296 if (_M_path->_M_type == _Type::_Multi)
1297 {
1298 __glibcxx_assert(_M_cur != _M_path->_M_cmpts.begin());
1299 --_M_cur;
1300 }
1301 else
1302 {
1303 __glibcxx_assert(_M_at_end);
1304 _M_at_end = false;
1305 }
1306 return *this;
1307 }
1308
1309 inline path::iterator::reference
1310 path::iterator::operator*() const noexcept
1311 {
1312 __glibcxx_assert(_M_path != nullptr);
1313 if (_M_path->_M_type == _Type::_Multi)
1314 {
1315 __glibcxx_assert(_M_cur != _M_path->_M_cmpts.end());
1316 return *_M_cur;
1317 }
1318 return *_M_path;
1319 }
1320
1321 inline bool
1322 path::iterator::_M_equals(iterator __rhs) const noexcept
1323 {
1324 if (_M_path != __rhs._M_path)
1325 return false;
1326 if (_M_path == nullptr)
1327 return true;
1328 if (_M_path->_M_type == path::_Type::_Multi)
1329 return _M_cur == __rhs._M_cur;
1330 return _M_at_end == __rhs._M_at_end;
1331 }
1332
1333 // Define these now that path and path::iterator are complete.
1334 // They needs to consider the string_view(Range&&) constructor during
1335 // overload resolution, which depends on whether range<path> is satisfied,
1336 // which depends on whether path::iterator is complete.
1337 inline bool operator<(const path& __lhs, const path& __rhs) noexcept
1338 { return __lhs.compare(__rhs) < 0; }
1339
1340 inline bool operator==(const path& __lhs, const path& __rhs) noexcept
1341 { return __lhs.compare(__rhs) == 0; }
1342
1343 /// @} group filesystem-ts
1344_GLIBCXX_END_NAMESPACE_CXX11
1345} // namespace v1
1346} // namespace filesystem
1347} // namespace experimental
1348
1349_GLIBCXX_END_NAMESPACE_VERSION
1350} // namespace std
1351
1352#endif // C++11
1353
1354#endif // _GLIBCXX_EXPERIMENTAL_FS_PATH_H
std::operator/
constexpr complex< _Tp > operator/(const complex< _Tp > &__x, const complex< _Tp > &__y)
Return new complex value x divided by y.
Definition: complex:425
std::make_error_code
error_code make_error_code(future_errc __errc) noexcept
Overload of make_error_code for future_errc.
Definition: future:94
std::true_type
integral_constant< bool, true > true_type
The type used as a compile-time boolean with true value.
Definition: type_traits:82
std::false_type
integral_constant< bool, false > false_type
The type used as a compile-time boolean with false value.
Definition: type_traits:85
std::move
constexpr std::remove_reference< _Tp >::type && move(_Tp &&__t) noexcept
Convert a value to an rvalue.
Definition: move.h:104
std::swap
void swap(any &__x, any &__y) noexcept
Exchange the states of two any objects.
Definition: any:429
std::__addressof
constexpr _Tp * __addressof(_Tp &__r) noexcept
Same as C++11 std::addressof.
Definition: move.h:49
std::string
basic_string< char > string
A string of char.
Definition: stringfwd.h:77
std::u32string
basic_string< char32_t > u32string
A string of char32_t.
Definition: stringfwd.h:92
std::u16string
basic_string< char16_t > u16string
A string of char16_t.
Definition: stringfwd.h:89
std::wstring
basic_string< wchar_t > wstring
A string of wchar_t.
Definition: stringfwd.h:80
std
ISO C++ entities toplevel namespace is std.
std::empty
constexpr auto empty(const _Container &__cont) noexcept(noexcept(__cont.empty())) -> decltype(__cont.empty())
Return whether a container is empty.
Definition: range_access.h:284
std::operator>>
std::basic_istream< _CharT, _Traits > & operator>>(std::basic_istream< _CharT, _Traits > &__is, bitset< _Nb > &__x)
Global I/O operators for bitsets.
Definition: bitset:1593
std::operator<<
std::basic_ostream< _CharT, _Traits > & operator<<(std::basic_ostream< _CharT, _Traits > &__os, const bitset< _Nb > &__x)
Global I/O operators for bitsets.
Definition: bitset:1683
std::basic_string_view
A non-owning reference to a string.
Definition: string_view:107
std::system_error
An exception type that includes an error_code value.
Definition: system_error:557
std::integral_constant
integral_constant
Definition: type_traits:63
std::enable_if
Define a member typedef type only if a boolean constant is true.
Definition: type_traits:107
std::is_same
is_same
Definition: type_traits:1399
std::is_base_of
is_base_of
Definition: type_traits:1412
std::codecvt
Primary class template codecvt.
Definition: codecvt.h:279
std::basic_string
Managing sequences of characters and character-like objects.
Definition: cow_string.h:115
std::basic_string::push_back
void push_back(_CharT __c)
Append a single character.
Definition: cow_string.h:1338
std::basic_string::data
const _CharT * data() const noexcept
Return const pointer to contents.
Definition: cow_string.h:2225
std::basic_string::reserve
void reserve(size_type __res_arg)
Attempt to preallocate enough memory for specified number of characters.
Definition: cow_string.h:3485
std::basic_string::size
size_type size() const noexcept
Returns the number of characters in the string, not including any null-termination.
Definition: cow_string.h:914
std::basic_string::begin
iterator begin()
Definition: cow_string.h:803
std::basic_string::c_str
const _CharT * c_str() const noexcept
Return const pointer to null-terminated contents.
Definition: cow_string.h:2213
std::basic_string< value_type >::npos
static const size_type npos
Value returned by various member functions when they fail.
Definition: cow_string.h:328
std::iterator_traits
Traits class for iterators.
Definition: stl_iterator_base_types.h:178
std::locale
Container class for localization functionality.
Definition: locale_classes.h:63
std::__detail::_Quoted_string
Struct for delimited strings.
Definition: quoted_string.h:50
std::pair
Struct holding two objects of arbitrary type.
Definition: stl_pair.h:189
std::input_iterator_tag
Marking input iterators.
Definition: stl_iterator_base_types.h:93
std::bidirectional_iterator_tag
Bidirectional iterators support a superset of forward iterator operations.
Definition: stl_iterator_base_types.h:103
std::iterator
Common iterator class.
Definition: stl_iterator_base_types.h:128
std::experimental::filesystem::filesystem_error
Exception type thrown by the Filesystem TS library.
Definition: experimental/bits/fs_path.h:694
std::experimental::basic_string_view
A non-owning reference to a string.
Definition: experimental/string_view:79