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1 : // Components for manipulating sequences of characters -*- C++ -*-
2 :
3 : // Copyright (C) 1997-2021 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 bits/basic_string.h
26 : * This is an internal header file, included by other library headers.
27 : * Do not attempt to use it directly. @headername{string}
28 : */
29 :
30 : //
31 : // ISO C++ 14882: 21 Strings library
32 : //
33 :
34 : #ifndef _BASIC_STRING_H
35 : #define _BASIC_STRING_H 1
36 :
37 : #pragma GCC system_header
38 :
39 : #include <ext/atomicity.h>
40 : #include <ext/alloc_traits.h>
41 : #include <debug/debug.h>
42 :
43 : #if __cplusplus >= 201103L
44 : #include <initializer_list>
45 : #endif
46 :
47 : #if __cplusplus >= 201703L
48 : # include <string_view>
49 : #endif
50 :
51 : namespace std _GLIBCXX_VISIBILITY(default)
52 : {
53 : _GLIBCXX_BEGIN_NAMESPACE_VERSION
54 :
55 : #ifdef __cpp_lib_is_constant_evaluated
56 : // Support P1032R1 in C++20 (but not P0980R1 yet).
57 : # define __cpp_lib_constexpr_string 201811L
58 : #elif __cplusplus >= 201703L
59 : // Support P0426R1 changes to char_traits in C++17.
60 : # define __cpp_lib_constexpr_string 201611L
61 : #elif __cplusplus > 201703L
62 : #endif
63 :
64 : #if _GLIBCXX_USE_CXX11_ABI
65 : _GLIBCXX_BEGIN_NAMESPACE_CXX11
66 : /**
67 : * @class basic_string basic_string.h <string>
68 : * @brief Managing sequences of characters and character-like objects.
69 : *
70 : * @ingroup strings
71 : * @ingroup sequences
72 : *
73 : * @tparam _CharT Type of character
74 : * @tparam _Traits Traits for character type, defaults to
75 : * char_traits<_CharT>.
76 : * @tparam _Alloc Allocator type, defaults to allocator<_CharT>.
77 : *
78 : * Meets the requirements of a <a href="tables.html#65">container</a>, a
79 : * <a href="tables.html#66">reversible container</a>, and a
80 : * <a href="tables.html#67">sequence</a>. Of the
81 : * <a href="tables.html#68">optional sequence requirements</a>, only
82 : * @c push_back, @c at, and @c %array access are supported.
83 : */
84 : template<typename _CharT, typename _Traits, typename _Alloc>
85 : class basic_string
86 : {
87 : typedef typename __gnu_cxx::__alloc_traits<_Alloc>::template
88 : rebind<_CharT>::other _Char_alloc_type;
89 : typedef __gnu_cxx::__alloc_traits<_Char_alloc_type> _Alloc_traits;
90 :
91 : // Types:
92 : public:
93 : typedef _Traits traits_type;
94 : typedef typename _Traits::char_type value_type;
95 : typedef _Char_alloc_type allocator_type;
96 : typedef typename _Alloc_traits::size_type size_type;
97 : typedef typename _Alloc_traits::difference_type difference_type;
98 : typedef typename _Alloc_traits::reference reference;
99 : typedef typename _Alloc_traits::const_reference const_reference;
100 : typedef typename _Alloc_traits::pointer pointer;
101 : typedef typename _Alloc_traits::const_pointer const_pointer;
102 : typedef __gnu_cxx::__normal_iterator<pointer, basic_string> iterator;
103 : typedef __gnu_cxx::__normal_iterator<const_pointer, basic_string>
104 : const_iterator;
105 : typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
106 : typedef std::reverse_iterator<iterator> reverse_iterator;
107 :
108 : /// Value returned by various member functions when they fail.
109 : static const size_type npos = static_cast<size_type>(-1);
110 :
111 : protected:
112 : // type used for positions in insert, erase etc.
113 : #if __cplusplus < 201103L
114 : typedef iterator __const_iterator;
115 : #else
116 : typedef const_iterator __const_iterator;
117 : #endif
118 :
119 : private:
120 : #if __cplusplus >= 201703L
121 : // A helper type for avoiding boiler-plate.
122 : typedef basic_string_view<_CharT, _Traits> __sv_type;
123 :
124 : template<typename _Tp, typename _Res>
125 : using _If_sv = enable_if_t<
126 : __and_<is_convertible<const _Tp&, __sv_type>,
127 : __not_<is_convertible<const _Tp*, const basic_string*>>,
128 : __not_<is_convertible<const _Tp&, const _CharT*>>>::value,
129 : _Res>;
130 :
131 : // Allows an implicit conversion to __sv_type.
132 : static __sv_type
133 : _S_to_string_view(__sv_type __svt) noexcept
134 : { return __svt; }
135 :
136 : // Wraps a string_view by explicit conversion and thus
137 : // allows to add an internal constructor that does not
138 : // participate in overload resolution when a string_view
139 : // is provided.
140 : struct __sv_wrapper
141 : {
142 : explicit __sv_wrapper(__sv_type __sv) noexcept : _M_sv(__sv) { }
143 : __sv_type _M_sv;
144 : };
145 :
146 : /**
147 : * @brief Only internally used: Construct string from a string view
148 : * wrapper.
149 : * @param __svw string view wrapper.
150 : * @param __a Allocator to use.
151 : */
152 : explicit
153 : basic_string(__sv_wrapper __svw, const _Alloc& __a)
154 : : basic_string(__svw._M_sv.data(), __svw._M_sv.size(), __a) { }
155 : #endif
156 :
157 : // Use empty-base optimization: http://www.cantrip.org/emptyopt.html
158 : struct _Alloc_hider : allocator_type // TODO check __is_final
159 : {
160 : #if __cplusplus < 201103L
161 : _Alloc_hider(pointer __dat, const _Alloc& __a = _Alloc())
162 : : allocator_type(__a), _M_p(__dat) { }
163 : #else
164 : _Alloc_hider(pointer __dat, const _Alloc& __a)
165 : : allocator_type(__a), _M_p(__dat) { }
166 :
167 : _Alloc_hider(pointer __dat, _Alloc&& __a = _Alloc())
168 : : allocator_type(std::move(__a)), _M_p(__dat) { }
169 : #endif
170 :
171 : pointer _M_p; // The actual data.
172 : };
173 :
174 : _Alloc_hider _M_dataplus;
175 : size_type _M_string_length;
176 :
177 : enum { _S_local_capacity = 15 / sizeof(_CharT) };
178 :
179 : union
180 : {
181 : _CharT _M_local_buf[_S_local_capacity + 1];
182 : size_type _M_allocated_capacity;
183 : };
184 :
185 : void
186 : _M_data(pointer __p)
187 : { _M_dataplus._M_p = __p; }
188 :
189 : void
190 : _M_length(size_type __length)
191 : { _M_string_length = __length; }
192 :
193 : pointer
194 : _M_data() const
195 : { return _M_dataplus._M_p; }
196 :
197 : pointer
198 : _M_local_data()
199 : {
200 : #if __cplusplus >= 201103L
201 : return std::pointer_traits<pointer>::pointer_to(*_M_local_buf);
202 : #else
203 : return pointer(_M_local_buf);
204 : #endif
205 : }
206 :
207 : const_pointer
208 : _M_local_data() const
209 : {
210 : #if __cplusplus >= 201103L
211 : return std::pointer_traits<const_pointer>::pointer_to(*_M_local_buf);
212 : #else
213 : return const_pointer(_M_local_buf);
214 : #endif
215 : }
216 :
217 : void
218 : _M_capacity(size_type __capacity)
219 : { _M_allocated_capacity = __capacity; }
220 :
221 : void
222 : _M_set_length(size_type __n)
223 : {
224 : _M_length(__n);
225 : traits_type::assign(_M_data()[__n], _CharT());
226 : }
227 :
228 : bool
229 : _M_is_local() const
230 : { return _M_data() == _M_local_data(); }
231 :
232 : // Create & Destroy
233 : pointer
234 : _M_create(size_type&, size_type);
235 :
236 : void
237 : _M_dispose()
238 : {
239 : if (!_M_is_local())
240 : _M_destroy(_M_allocated_capacity);
241 : }
242 :
243 : void
244 : _M_destroy(size_type __size) throw()
245 : { _Alloc_traits::deallocate(_M_get_allocator(), _M_data(), __size + 1); }
246 :
247 : // _M_construct_aux is used to implement the 21.3.1 para 15 which
248 : // requires special behaviour if _InIterator is an integral type
249 : template<typename _InIterator>
250 : void
251 140398 : _M_construct_aux(_InIterator __beg, _InIterator __end,
252 : std::__false_type)
253 : {
254 : typedef typename iterator_traits<_InIterator>::iterator_category _Tag;
255 140398 : _M_construct(__beg, __end, _Tag());
256 140398 : }
257 :
258 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
259 : // 438. Ambiguity in the "do the right thing" clause
260 : template<typename _Integer>
261 : void
262 : _M_construct_aux(_Integer __beg, _Integer __end, std::__true_type)
263 : { _M_construct_aux_2(static_cast<size_type>(__beg), __end); }
264 :
265 : void
266 : _M_construct_aux_2(size_type __req, _CharT __c)
267 : { _M_construct(__req, __c); }
268 :
269 : template<typename _InIterator>
270 : void
271 140398 : _M_construct(_InIterator __beg, _InIterator __end)
272 : {
273 : typedef typename std::__is_integer<_InIterator>::__type _Integral;
274 140398 : _M_construct_aux(__beg, __end, _Integral());
275 140398 : }
276 :
277 : // For Input Iterators, used in istreambuf_iterators, etc.
278 : template<typename _InIterator>
279 : void
280 : _M_construct(_InIterator __beg, _InIterator __end,
281 : std::input_iterator_tag);
282 :
283 : // For forward_iterators up to random_access_iterators, used for
284 : // string::iterator, _CharT*, etc.
285 : template<typename _FwdIterator>
286 : void
287 : _M_construct(_FwdIterator __beg, _FwdIterator __end,
288 : std::forward_iterator_tag);
289 :
290 : void
291 : _M_construct(size_type __req, _CharT __c);
292 :
293 : allocator_type&
294 : _M_get_allocator()
295 : { return _M_dataplus; }
296 :
297 : const allocator_type&
298 : _M_get_allocator() const
299 : { return _M_dataplus; }
300 :
301 : private:
302 :
303 : #ifdef _GLIBCXX_DISAMBIGUATE_REPLACE_INST
304 : // The explicit instantiations in misc-inst.cc require this due to
305 : // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64063
306 : template<typename _Tp, bool _Requires =
307 : !__are_same<_Tp, _CharT*>::__value
308 : && !__are_same<_Tp, const _CharT*>::__value
309 : && !__are_same<_Tp, iterator>::__value
310 : && !__are_same<_Tp, const_iterator>::__value>
311 : struct __enable_if_not_native_iterator
312 : { typedef basic_string& __type; };
313 : template<typename _Tp>
314 : struct __enable_if_not_native_iterator<_Tp, false> { };
315 : #endif
316 :
317 : size_type
318 : _M_check(size_type __pos, const char* __s) const
319 : {
320 : if (__pos > this->size())
321 : __throw_out_of_range_fmt(__N("%s: __pos (which is %zu) > "
322 : "this->size() (which is %zu)"),
323 : __s, __pos, this->size());
324 : return __pos;
325 : }
326 :
327 : void
328 : _M_check_length(size_type __n1, size_type __n2, const char* __s) const
329 : {
330 : if (this->max_size() - (this->size() - __n1) < __n2)
331 : __throw_length_error(__N(__s));
332 : }
333 :
334 :
335 : // NB: _M_limit doesn't check for a bad __pos value.
336 : size_type
337 : _M_limit(size_type __pos, size_type __off) const _GLIBCXX_NOEXCEPT
338 : {
339 : const bool __testoff = __off < this->size() - __pos;
340 : return __testoff ? __off : this->size() - __pos;
341 : }
342 :
343 : // True if _Rep and source do not overlap.
344 : bool
345 : _M_disjunct(const _CharT* __s) const _GLIBCXX_NOEXCEPT
346 : {
347 : return (less<const _CharT*>()(__s, _M_data())
348 : || less<const _CharT*>()(_M_data() + this->size(), __s));
349 : }
350 :
351 : // When __n = 1 way faster than the general multichar
352 : // traits_type::copy/move/assign.
353 : static void
354 : _S_copy(_CharT* __d, const _CharT* __s, size_type __n)
355 : {
356 : if (__n == 1)
357 : traits_type::assign(*__d, *__s);
358 : else
359 : traits_type::copy(__d, __s, __n);
360 : }
361 :
362 : static void
363 : _S_move(_CharT* __d, const _CharT* __s, size_type __n)
364 : {
365 : if (__n == 1)
366 : traits_type::assign(*__d, *__s);
367 : else
368 : traits_type::move(__d, __s, __n);
369 : }
370 :
371 : static void
372 : _S_assign(_CharT* __d, size_type __n, _CharT __c)
373 : {
374 : if (__n == 1)
375 : traits_type::assign(*__d, __c);
376 : else
377 : traits_type::assign(__d, __n, __c);
378 : }
379 :
380 : // _S_copy_chars is a separate template to permit specialization
381 : // to optimize for the common case of pointers as iterators.
382 : template<class _Iterator>
383 : static void
384 180 : _S_copy_chars(_CharT* __p, _Iterator __k1, _Iterator __k2)
385 : {
386 1630491 : for (; __k1 != __k2; ++__k1, (void)++__p)
387 1630311 : traits_type::assign(*__p, *__k1); // These types are off.
388 180 : }
389 :
390 : static void
391 : _S_copy_chars(_CharT* __p, iterator __k1, iterator __k2) _GLIBCXX_NOEXCEPT
392 : { _S_copy_chars(__p, __k1.base(), __k2.base()); }
393 :
394 : static void
395 : _S_copy_chars(_CharT* __p, const_iterator __k1, const_iterator __k2)
396 : _GLIBCXX_NOEXCEPT
397 : { _S_copy_chars(__p, __k1.base(), __k2.base()); }
398 :
399 : static void
400 : _S_copy_chars(_CharT* __p, _CharT* __k1, _CharT* __k2) _GLIBCXX_NOEXCEPT
401 : { _S_copy(__p, __k1, __k2 - __k1); }
402 :
403 : static void
404 : _S_copy_chars(_CharT* __p, const _CharT* __k1, const _CharT* __k2)
405 : _GLIBCXX_NOEXCEPT
406 : { _S_copy(__p, __k1, __k2 - __k1); }
407 :
408 : static int
409 : _S_compare(size_type __n1, size_type __n2) _GLIBCXX_NOEXCEPT
410 : {
411 : const difference_type __d = difference_type(__n1 - __n2);
412 :
413 : if (__d > __gnu_cxx::__numeric_traits<int>::__max)
414 : return __gnu_cxx::__numeric_traits<int>::__max;
415 : else if (__d < __gnu_cxx::__numeric_traits<int>::__min)
416 : return __gnu_cxx::__numeric_traits<int>::__min;
417 : else
418 : return int(__d);
419 : }
420 :
421 : void
422 : _M_assign(const basic_string&);
423 :
424 : void
425 : _M_mutate(size_type __pos, size_type __len1, const _CharT* __s,
426 : size_type __len2);
427 :
428 : void
429 : _M_erase(size_type __pos, size_type __n);
430 :
431 : public:
432 : // Construct/copy/destroy:
433 : // NB: We overload ctors in some cases instead of using default
434 : // arguments, per 17.4.4.4 para. 2 item 2.
435 :
436 : /**
437 : * @brief Default constructor creates an empty string.
438 : */
439 : basic_string()
440 : _GLIBCXX_NOEXCEPT_IF(is_nothrow_default_constructible<_Alloc>::value)
441 : : _M_dataplus(_M_local_data())
442 : { _M_set_length(0); }
443 :
444 : /**
445 : * @brief Construct an empty string using allocator @a a.
446 : */
447 : explicit
448 : basic_string(const _Alloc& __a) _GLIBCXX_NOEXCEPT
449 : : _M_dataplus(_M_local_data(), __a)
450 : { _M_set_length(0); }
451 :
452 : /**
453 : * @brief Construct string with copy of value of @a __str.
454 : * @param __str Source string.
455 : */
456 : basic_string(const basic_string& __str)
457 : : _M_dataplus(_M_local_data(),
458 : _Alloc_traits::_S_select_on_copy(__str._M_get_allocator()))
459 : { _M_construct(__str._M_data(), __str._M_data() + __str.length()); }
460 :
461 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
462 : // 2583. no way to supply an allocator for basic_string(str, pos)
463 : /**
464 : * @brief Construct string as copy of a substring.
465 : * @param __str Source string.
466 : * @param __pos Index of first character to copy from.
467 : * @param __a Allocator to use.
468 : */
469 : basic_string(const basic_string& __str, size_type __pos,
470 : const _Alloc& __a = _Alloc())
471 : : _M_dataplus(_M_local_data(), __a)
472 : {
473 : const _CharT* __start = __str._M_data()
474 : + __str._M_check(__pos, "basic_string::basic_string");
475 : _M_construct(__start, __start + __str._M_limit(__pos, npos));
476 : }
477 :
478 : /**
479 : * @brief Construct string as copy of a substring.
480 : * @param __str Source string.
481 : * @param __pos Index of first character to copy from.
482 : * @param __n Number of characters to copy.
483 : */
484 : basic_string(const basic_string& __str, size_type __pos,
485 : size_type __n)
486 : : _M_dataplus(_M_local_data())
487 : {
488 : const _CharT* __start = __str._M_data()
489 : + __str._M_check(__pos, "basic_string::basic_string");
490 : _M_construct(__start, __start + __str._M_limit(__pos, __n));
491 : }
492 :
493 : /**
494 : * @brief Construct string as copy of a substring.
495 : * @param __str Source string.
496 : * @param __pos Index of first character to copy from.
497 : * @param __n Number of characters to copy.
498 : * @param __a Allocator to use.
499 : */
500 : basic_string(const basic_string& __str, size_type __pos,
501 : size_type __n, const _Alloc& __a)
502 : : _M_dataplus(_M_local_data(), __a)
503 : {
504 : const _CharT* __start
505 : = __str._M_data() + __str._M_check(__pos, "string::string");
506 : _M_construct(__start, __start + __str._M_limit(__pos, __n));
507 : }
508 :
509 : /**
510 : * @brief Construct string initialized by a character %array.
511 : * @param __s Source character %array.
512 : * @param __n Number of characters to copy.
513 : * @param __a Allocator to use (default is default allocator).
514 : *
515 : * NB: @a __s must have at least @a __n characters, '\\0'
516 : * has no special meaning.
517 : */
518 : basic_string(const _CharT* __s, size_type __n,
519 : const _Alloc& __a = _Alloc())
520 : : _M_dataplus(_M_local_data(), __a)
521 : { _M_construct(__s, __s + __n); }
522 :
523 : /**
524 : * @brief Construct string as copy of a C string.
525 : * @param __s Source C string.
526 : * @param __a Allocator to use (default is default allocator).
527 : */
528 : #if __cpp_deduction_guides && ! defined _GLIBCXX_DEFINING_STRING_INSTANTIATIONS
529 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
530 : // 3076. basic_string CTAD ambiguity
531 : template<typename = _RequireAllocator<_Alloc>>
532 : #endif
533 949900 : basic_string(const _CharT* __s, const _Alloc& __a = _Alloc())
534 949900 : : _M_dataplus(_M_local_data(), __a)
535 : {
536 949897 : const _CharT* __end = __s ? __s + traits_type::length(__s)
537 : // We just need a non-null pointer here to get an exception:
538 : : reinterpret_cast<const _CharT*>(__alignof__(_CharT));
539 949473 : _M_construct(__s, __end, random_access_iterator_tag());
540 949053 : }
541 :
542 : /**
543 : * @brief Construct string as multiple characters.
544 : * @param __n Number of characters.
545 : * @param __c Character to use.
546 : * @param __a Allocator to use (default is default allocator).
547 : */
548 : #if __cpp_deduction_guides && ! defined _GLIBCXX_DEFINING_STRING_INSTANTIATIONS
549 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
550 : // 3076. basic_string CTAD ambiguity
551 : template<typename = _RequireAllocator<_Alloc>>
552 : #endif
553 53262 : basic_string(size_type __n, _CharT __c, const _Alloc& __a = _Alloc())
554 53262 : : _M_dataplus(_M_local_data(), __a)
555 53262 : { _M_construct(__n, __c); }
556 :
557 : #if __cplusplus >= 201103L
558 : /**
559 : * @brief Move construct string.
560 : * @param __str Source string.
561 : *
562 : * The newly-created string contains the exact contents of @a __str.
563 : * @a __str is a valid, but unspecified string.
564 : */
565 : basic_string(basic_string&& __str) noexcept
566 : : _M_dataplus(_M_local_data(), std::move(__str._M_get_allocator()))
567 : {
568 : if (__str._M_is_local())
569 : {
570 : traits_type::copy(_M_local_buf, __str._M_local_buf,
571 : _S_local_capacity + 1);
572 : }
573 : else
574 : {
575 : _M_data(__str._M_data());
576 : _M_capacity(__str._M_allocated_capacity);
577 : }
578 :
579 : // Must use _M_length() here not _M_set_length() because
580 : // basic_stringbuf relies on writing into unallocated capacity so
581 : // we mess up the contents if we put a '\0' in the string.
582 : _M_length(__str.length());
583 : __str._M_data(__str._M_local_data());
584 : __str._M_set_length(0);
585 : }
586 :
587 : /**
588 : * @brief Construct string from an initializer %list.
589 : * @param __l std::initializer_list of characters.
590 : * @param __a Allocator to use (default is default allocator).
591 : */
592 : basic_string(initializer_list<_CharT> __l, const _Alloc& __a = _Alloc())
593 : : _M_dataplus(_M_local_data(), __a)
594 : { _M_construct(__l.begin(), __l.end()); }
595 :
596 : basic_string(const basic_string& __str, const _Alloc& __a)
597 : : _M_dataplus(_M_local_data(), __a)
598 : { _M_construct(__str.begin(), __str.end()); }
599 :
600 : basic_string(basic_string&& __str, const _Alloc& __a)
601 : noexcept(_Alloc_traits::_S_always_equal())
602 : : _M_dataplus(_M_local_data(), __a)
603 : {
604 : if (__str._M_is_local())
605 : {
606 : traits_type::copy(_M_local_buf, __str._M_local_buf,
607 : _S_local_capacity + 1);
608 : _M_length(__str.length());
609 : __str._M_set_length(0);
610 : }
611 : else if (_Alloc_traits::_S_always_equal()
612 : || __str.get_allocator() == __a)
613 : {
614 : _M_data(__str._M_data());
615 : _M_length(__str.length());
616 : _M_capacity(__str._M_allocated_capacity);
617 : __str._M_data(__str._M_local_buf);
618 : __str._M_set_length(0);
619 : }
620 : else
621 : _M_construct(__str.begin(), __str.end());
622 : }
623 :
624 : #endif // C++11
625 :
626 : /**
627 : * @brief Construct string as copy of a range.
628 : * @param __beg Start of range.
629 : * @param __end End of range.
630 : * @param __a Allocator to use (default is default allocator).
631 : */
632 : #if __cplusplus >= 201103L
633 : template<typename _InputIterator,
634 : typename = std::_RequireInputIter<_InputIterator>>
635 : #else
636 : template<typename _InputIterator>
637 : #endif
638 140398 : basic_string(_InputIterator __beg, _InputIterator __end,
639 : const _Alloc& __a = _Alloc())
640 140398 : : _M_dataplus(_M_local_data(), __a)
641 140398 : { _M_construct(__beg, __end); }
642 :
643 : #if __cplusplus >= 201703L
644 : /**
645 : * @brief Construct string from a substring of a string_view.
646 : * @param __t Source object convertible to string view.
647 : * @param __pos The index of the first character to copy from __t.
648 : * @param __n The number of characters to copy from __t.
649 : * @param __a Allocator to use.
650 : */
651 : template<typename _Tp,
652 : typename = enable_if_t<is_convertible_v<const _Tp&, __sv_type>>>
653 : basic_string(const _Tp& __t, size_type __pos, size_type __n,
654 : const _Alloc& __a = _Alloc())
655 : : basic_string(_S_to_string_view(__t).substr(__pos, __n), __a) { }
656 :
657 : /**
658 : * @brief Construct string from a string_view.
659 : * @param __t Source object convertible to string view.
660 : * @param __a Allocator to use (default is default allocator).
661 : */
662 : template<typename _Tp, typename = _If_sv<_Tp, void>>
663 : explicit
664 216757 : basic_string(const _Tp& __t, const _Alloc& __a = _Alloc())
665 216757 : : basic_string(__sv_wrapper(_S_to_string_view(__t)), __a) { }
666 : #endif // C++17
667 :
668 : /**
669 : * @brief Destroy the string instance.
670 : */
671 : ~basic_string()
672 : { _M_dispose(); }
673 :
674 : /**
675 : * @brief Assign the value of @a str to this string.
676 : * @param __str Source string.
677 : */
678 : basic_string&
679 : operator=(const basic_string& __str)
680 : {
681 : return this->assign(__str);
682 : }
683 :
684 : /**
685 : * @brief Copy contents of @a s into this string.
686 : * @param __s Source null-terminated string.
687 : */
688 : basic_string&
689 : operator=(const _CharT* __s)
690 : { return this->assign(__s); }
691 :
692 : /**
693 : * @brief Set value to string of length 1.
694 : * @param __c Source character.
695 : *
696 : * Assigning to a character makes this string length 1 and
697 : * (*this)[0] == @a c.
698 : */
699 : basic_string&
700 : operator=(_CharT __c)
701 : {
702 : this->assign(1, __c);
703 : return *this;
704 : }
705 :
706 : #if __cplusplus >= 201103L
707 : /**
708 : * @brief Move assign the value of @a str to this string.
709 : * @param __str Source string.
710 : *
711 : * The contents of @a str are moved into this string (without copying).
712 : * @a str is a valid, but unspecified string.
713 : */
714 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
715 : // 2063. Contradictory requirements for string move assignment
716 : basic_string&
717 : operator=(basic_string&& __str)
718 : noexcept(_Alloc_traits::_S_nothrow_move())
719 : {
720 : if (!_M_is_local() && _Alloc_traits::_S_propagate_on_move_assign()
721 : && !_Alloc_traits::_S_always_equal()
722 : && _M_get_allocator() != __str._M_get_allocator())
723 : {
724 : // Destroy existing storage before replacing allocator.
725 : _M_destroy(_M_allocated_capacity);
726 : _M_data(_M_local_data());
727 : _M_set_length(0);
728 : }
729 : // Replace allocator if POCMA is true.
730 : std::__alloc_on_move(_M_get_allocator(), __str._M_get_allocator());
731 :
732 : if (__str._M_is_local())
733 : {
734 : // We've always got room for a short string, just copy it
735 : // (unless this is a self-move, because that would violate the
736 : // char_traits::copy precondition that the ranges don't overlap).
737 : if (__builtin_expect(std::__addressof(__str) != this, true))
738 : {
739 : if (__str.size())
740 : this->_S_copy(_M_data(), __str._M_data(), __str.size());
741 : _M_set_length(__str.size());
742 : }
743 : }
744 : else if (_Alloc_traits::_S_propagate_on_move_assign()
745 : || _Alloc_traits::_S_always_equal()
746 : || _M_get_allocator() == __str._M_get_allocator())
747 : {
748 : // Just move the allocated pointer, our allocator can free it.
749 : pointer __data = nullptr;
750 : size_type __capacity;
751 : if (!_M_is_local())
752 : {
753 : if (_Alloc_traits::_S_always_equal())
754 : {
755 : // __str can reuse our existing storage.
756 : __data = _M_data();
757 : __capacity = _M_allocated_capacity;
758 : }
759 : else // __str can't use it, so free it.
760 : _M_destroy(_M_allocated_capacity);
761 : }
762 :
763 : _M_data(__str._M_data());
764 : _M_length(__str.length());
765 : _M_capacity(__str._M_allocated_capacity);
766 : if (__data)
767 : {
768 : __str._M_data(__data);
769 : __str._M_capacity(__capacity);
770 : }
771 : else
772 : __str._M_data(__str._M_local_buf);
773 : }
774 : else // Need to do a deep copy
775 : assign(__str);
776 : __str.clear();
777 : return *this;
778 : }
779 :
780 : /**
781 : * @brief Set value to string constructed from initializer %list.
782 : * @param __l std::initializer_list.
783 : */
784 : basic_string&
785 : operator=(initializer_list<_CharT> __l)
786 : {
787 : this->assign(__l.begin(), __l.size());
788 : return *this;
789 : }
790 : #endif // C++11
791 :
792 : #if __cplusplus >= 201703L
793 : /**
794 : * @brief Set value to string constructed from a string_view.
795 : * @param __svt An object convertible to string_view.
796 : */
797 : template<typename _Tp>
798 : _If_sv<_Tp, basic_string&>
799 53194 : operator=(const _Tp& __svt)
800 53194 : { return this->assign(__svt); }
801 :
802 : /**
803 : * @brief Convert to a string_view.
804 : * @return A string_view.
805 : */
806 : operator __sv_type() const noexcept
807 : { return __sv_type(data(), size()); }
808 : #endif // C++17
809 :
810 : // Iterators:
811 : /**
812 : * Returns a read/write iterator that points to the first character in
813 : * the %string.
814 : */
815 : iterator
816 : begin() _GLIBCXX_NOEXCEPT
817 : { return iterator(_M_data()); }
818 :
819 : /**
820 : * Returns a read-only (constant) iterator that points to the first
821 : * character in the %string.
822 : */
823 : const_iterator
824 : begin() const _GLIBCXX_NOEXCEPT
825 : { return const_iterator(_M_data()); }
826 :
827 : /**
828 : * Returns a read/write iterator that points one past the last
829 : * character in the %string.
830 : */
831 : iterator
832 : end() _GLIBCXX_NOEXCEPT
833 : { return iterator(_M_data() + this->size()); }
834 :
835 : /**
836 : * Returns a read-only (constant) iterator that points one past the
837 : * last character in the %string.
838 : */
839 : const_iterator
840 : end() const _GLIBCXX_NOEXCEPT
841 : { return const_iterator(_M_data() + this->size()); }
842 :
843 : /**
844 : * Returns a read/write reverse iterator that points to the last
845 : * character in the %string. Iteration is done in reverse element
846 : * order.
847 : */
848 : reverse_iterator
849 : rbegin() _GLIBCXX_NOEXCEPT
850 : { return reverse_iterator(this->end()); }
851 :
852 : /**
853 : * Returns a read-only (constant) reverse iterator that points
854 : * to the last character in the %string. Iteration is done in
855 : * reverse element order.
856 : */
857 : const_reverse_iterator
858 : rbegin() const _GLIBCXX_NOEXCEPT
859 : { return const_reverse_iterator(this->end()); }
860 :
861 : /**
862 : * Returns a read/write reverse iterator that points to one before the
863 : * first character in the %string. Iteration is done in reverse
864 : * element order.
865 : */
866 : reverse_iterator
867 : rend() _GLIBCXX_NOEXCEPT
868 : { return reverse_iterator(this->begin()); }
869 :
870 : /**
871 : * Returns a read-only (constant) reverse iterator that points
872 : * to one before the first character in the %string. Iteration
873 : * is done in reverse element order.
874 : */
875 : const_reverse_iterator
876 : rend() const _GLIBCXX_NOEXCEPT
877 : { return const_reverse_iterator(this->begin()); }
878 :
879 : #if __cplusplus >= 201103L
880 : /**
881 : * Returns a read-only (constant) iterator that points to the first
882 : * character in the %string.
883 : */
884 : const_iterator
885 : cbegin() const noexcept
886 : { return const_iterator(this->_M_data()); }
887 :
888 : /**
889 : * Returns a read-only (constant) iterator that points one past the
890 : * last character in the %string.
891 : */
892 : const_iterator
893 : cend() const noexcept
894 : { return const_iterator(this->_M_data() + this->size()); }
895 :
896 : /**
897 : * Returns a read-only (constant) reverse iterator that points
898 : * to the last character in the %string. Iteration is done in
899 : * reverse element order.
900 : */
901 : const_reverse_iterator
902 : crbegin() const noexcept
903 : { return const_reverse_iterator(this->end()); }
904 :
905 : /**
906 : * Returns a read-only (constant) reverse iterator that points
907 : * to one before the first character in the %string. Iteration
908 : * is done in reverse element order.
909 : */
910 : const_reverse_iterator
911 : crend() const noexcept
912 : { return const_reverse_iterator(this->begin()); }
913 : #endif
914 :
915 : public:
916 : // Capacity:
917 : /// Returns the number of characters in the string, not including any
918 : /// null-termination.
919 : size_type
920 : size() const _GLIBCXX_NOEXCEPT
921 : { return _M_string_length; }
922 :
923 : /// Returns the number of characters in the string, not including any
924 : /// null-termination.
925 : size_type
926 : length() const _GLIBCXX_NOEXCEPT
927 : { return _M_string_length; }
928 :
929 : /// Returns the size() of the largest possible %string.
930 : size_type
931 : max_size() const _GLIBCXX_NOEXCEPT
932 : { return (_Alloc_traits::max_size(_M_get_allocator()) - 1) / 2; }
933 :
934 : /**
935 : * @brief Resizes the %string to the specified number of characters.
936 : * @param __n Number of characters the %string should contain.
937 : * @param __c Character to fill any new elements.
938 : *
939 : * This function will %resize the %string to the specified
940 : * number of characters. If the number is smaller than the
941 : * %string's current size the %string is truncated, otherwise
942 : * the %string is extended and new elements are %set to @a __c.
943 : */
944 : void
945 : resize(size_type __n, _CharT __c);
946 :
947 : /**
948 : * @brief Resizes the %string to the specified number of characters.
949 : * @param __n Number of characters the %string should contain.
950 : *
951 : * This function will resize the %string to the specified length. If
952 : * the new size is smaller than the %string's current size the %string
953 : * is truncated, otherwise the %string is extended and new characters
954 : * are default-constructed. For basic types such as char, this means
955 : * setting them to 0.
956 : */
957 : void
958 : resize(size_type __n)
959 : { this->resize(__n, _CharT()); }
960 :
961 : #if __cplusplus >= 201103L
962 : #pragma GCC diagnostic push
963 : #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
964 : /// A non-binding request to reduce capacity() to size().
965 : void
966 : shrink_to_fit() noexcept
967 : { reserve(); }
968 : #pragma GCC diagnostic pop
969 : #endif
970 :
971 : /**
972 : * Returns the total number of characters that the %string can hold
973 : * before needing to allocate more memory.
974 : */
975 : size_type
976 : capacity() const _GLIBCXX_NOEXCEPT
977 : {
978 : return _M_is_local() ? size_type(_S_local_capacity)
979 : : _M_allocated_capacity;
980 : }
981 :
982 : /**
983 : * @brief Attempt to preallocate enough memory for specified number of
984 : * characters.
985 : * @param __res_arg Number of characters required.
986 : * @throw std::length_error If @a __res_arg exceeds @c max_size().
987 : *
988 : * This function attempts to reserve enough memory for the
989 : * %string to hold the specified number of characters. If the
990 : * number requested is more than max_size(), length_error is
991 : * thrown.
992 : *
993 : * The advantage of this function is that if optimal code is a
994 : * necessity and the user can determine the string length that will be
995 : * required, the user can reserve the memory in %advance, and thus
996 : * prevent a possible reallocation of memory and copying of %string
997 : * data.
998 : */
999 : void
1000 : reserve(size_type __res_arg);
1001 :
1002 : /**
1003 : * Equivalent to shrink_to_fit().
1004 : */
1005 : #if __cplusplus > 201703L
1006 : [[deprecated("use shrink_to_fit() instead")]]
1007 : #endif
1008 : void
1009 : reserve();
1010 :
1011 : /**
1012 : * Erases the string, making it empty.
1013 : */
1014 : void
1015 : clear() _GLIBCXX_NOEXCEPT
1016 : { _M_set_length(0); }
1017 :
1018 : /**
1019 : * Returns true if the %string is empty. Equivalent to
1020 : * <code>*this == ""</code>.
1021 : */
1022 : _GLIBCXX_NODISCARD bool
1023 : empty() const _GLIBCXX_NOEXCEPT
1024 : { return this->size() == 0; }
1025 :
1026 : // Element access:
1027 : /**
1028 : * @brief Subscript access to the data contained in the %string.
1029 : * @param __pos The index of the character to access.
1030 : * @return Read-only (constant) reference to the character.
1031 : *
1032 : * This operator allows for easy, array-style, data access.
1033 : * Note that data access with this operator is unchecked and
1034 : * out_of_range lookups are not defined. (For checked lookups
1035 : * see at().)
1036 : */
1037 : const_reference
1038 : operator[] (size_type __pos) const _GLIBCXX_NOEXCEPT
1039 : {
1040 : __glibcxx_assert(__pos <= size());
1041 : return _M_data()[__pos];
1042 : }
1043 :
1044 : /**
1045 : * @brief Subscript access to the data contained in the %string.
1046 : * @param __pos The index of the character to access.
1047 : * @return Read/write reference to the character.
1048 : *
1049 : * This operator allows for easy, array-style, data access.
1050 : * Note that data access with this operator is unchecked and
1051 : * out_of_range lookups are not defined. (For checked lookups
1052 : * see at().)
1053 : */
1054 : reference
1055 : operator[](size_type __pos)
1056 : {
1057 : // Allow pos == size() both in C++98 mode, as v3 extension,
1058 : // and in C++11 mode.
1059 : __glibcxx_assert(__pos <= size());
1060 : // In pedantic mode be strict in C++98 mode.
1061 : _GLIBCXX_DEBUG_PEDASSERT(__cplusplus >= 201103L || __pos < size());
1062 : return _M_data()[__pos];
1063 : }
1064 :
1065 : /**
1066 : * @brief Provides access to the data contained in the %string.
1067 : * @param __n The index of the character to access.
1068 : * @return Read-only (const) reference to the character.
1069 : * @throw std::out_of_range If @a n is an invalid index.
1070 : *
1071 : * This function provides for safer data access. The parameter is
1072 : * first checked that it is in the range of the string. The function
1073 : * throws out_of_range if the check fails.
1074 : */
1075 : const_reference
1076 : at(size_type __n) const
1077 : {
1078 : if (__n >= this->size())
1079 : __throw_out_of_range_fmt(__N("basic_string::at: __n "
1080 : "(which is %zu) >= this->size() "
1081 : "(which is %zu)"),
1082 : __n, this->size());
1083 : return _M_data()[__n];
1084 : }
1085 :
1086 : /**
1087 : * @brief Provides access to the data contained in the %string.
1088 : * @param __n The index of the character to access.
1089 : * @return Read/write reference to the character.
1090 : * @throw std::out_of_range If @a n is an invalid index.
1091 : *
1092 : * This function provides for safer data access. The parameter is
1093 : * first checked that it is in the range of the string. The function
1094 : * throws out_of_range if the check fails.
1095 : */
1096 : reference
1097 : at(size_type __n)
1098 : {
1099 : if (__n >= size())
1100 : __throw_out_of_range_fmt(__N("basic_string::at: __n "
1101 : "(which is %zu) >= this->size() "
1102 : "(which is %zu)"),
1103 : __n, this->size());
1104 : return _M_data()[__n];
1105 : }
1106 :
1107 : #if __cplusplus >= 201103L
1108 : /**
1109 : * Returns a read/write reference to the data at the first
1110 : * element of the %string.
1111 : */
1112 : reference
1113 : front() noexcept
1114 : {
1115 : __glibcxx_assert(!empty());
1116 : return operator[](0);
1117 : }
1118 :
1119 : /**
1120 : * Returns a read-only (constant) reference to the data at the first
1121 : * element of the %string.
1122 : */
1123 : const_reference
1124 : front() const noexcept
1125 : {
1126 : __glibcxx_assert(!empty());
1127 : return operator[](0);
1128 : }
1129 :
1130 : /**
1131 : * Returns a read/write reference to the data at the last
1132 : * element of the %string.
1133 : */
1134 : reference
1135 : back() noexcept
1136 : {
1137 : __glibcxx_assert(!empty());
1138 : return operator[](this->size() - 1);
1139 : }
1140 :
1141 : /**
1142 : * Returns a read-only (constant) reference to the data at the
1143 : * last element of the %string.
1144 : */
1145 : const_reference
1146 : back() const noexcept
1147 : {
1148 : __glibcxx_assert(!empty());
1149 : return operator[](this->size() - 1);
1150 : }
1151 : #endif
1152 :
1153 : // Modifiers:
1154 : /**
1155 : * @brief Append a string to this string.
1156 : * @param __str The string to append.
1157 : * @return Reference to this string.
1158 : */
1159 : basic_string&
1160 : operator+=(const basic_string& __str)
1161 : { return this->append(__str); }
1162 :
1163 : /**
1164 : * @brief Append a C string.
1165 : * @param __s The C string to append.
1166 : * @return Reference to this string.
1167 : */
1168 : basic_string&
1169 : operator+=(const _CharT* __s)
1170 : { return this->append(__s); }
1171 :
1172 : /**
1173 : * @brief Append a character.
1174 : * @param __c The character to append.
1175 : * @return Reference to this string.
1176 : */
1177 : basic_string&
1178 : operator+=(_CharT __c)
1179 : {
1180 : this->push_back(__c);
1181 : return *this;
1182 : }
1183 :
1184 : #if __cplusplus >= 201103L
1185 : /**
1186 : * @brief Append an initializer_list of characters.
1187 : * @param __l The initializer_list of characters to be appended.
1188 : * @return Reference to this string.
1189 : */
1190 : basic_string&
1191 : operator+=(initializer_list<_CharT> __l)
1192 : { return this->append(__l.begin(), __l.size()); }
1193 : #endif // C++11
1194 :
1195 : #if __cplusplus >= 201703L
1196 : /**
1197 : * @brief Append a string_view.
1198 : * @param __svt An object convertible to string_view to be appended.
1199 : * @return Reference to this string.
1200 : */
1201 : template<typename _Tp>
1202 : _If_sv<_Tp, basic_string&>
1203 5539 : operator+=(const _Tp& __svt)
1204 5539 : { return this->append(__svt); }
1205 : #endif // C++17
1206 :
1207 : /**
1208 : * @brief Append a string to this string.
1209 : * @param __str The string to append.
1210 : * @return Reference to this string.
1211 : */
1212 : basic_string&
1213 : append(const basic_string& __str)
1214 : { return _M_append(__str._M_data(), __str.size()); }
1215 :
1216 : /**
1217 : * @brief Append a substring.
1218 : * @param __str The string to append.
1219 : * @param __pos Index of the first character of str to append.
1220 : * @param __n The number of characters to append.
1221 : * @return Reference to this string.
1222 : * @throw std::out_of_range if @a __pos is not a valid index.
1223 : *
1224 : * This function appends @a __n characters from @a __str
1225 : * starting at @a __pos to this string. If @a __n is is larger
1226 : * than the number of available characters in @a __str, the
1227 : * remainder of @a __str is appended.
1228 : */
1229 : basic_string&
1230 : append(const basic_string& __str, size_type __pos, size_type __n = npos)
1231 : { return _M_append(__str._M_data()
1232 : + __str._M_check(__pos, "basic_string::append"),
1233 : __str._M_limit(__pos, __n)); }
1234 :
1235 : /**
1236 : * @brief Append a C substring.
1237 : * @param __s The C string to append.
1238 : * @param __n The number of characters to append.
1239 : * @return Reference to this string.
1240 : */
1241 : basic_string&
1242 : append(const _CharT* __s, size_type __n)
1243 : {
1244 : __glibcxx_requires_string_len(__s, __n);
1245 : _M_check_length(size_type(0), __n, "basic_string::append");
1246 : return _M_append(__s, __n);
1247 : }
1248 :
1249 : /**
1250 : * @brief Append a C string.
1251 : * @param __s The C string to append.
1252 : * @return Reference to this string.
1253 : */
1254 : basic_string&
1255 : append(const _CharT* __s)
1256 : {
1257 : __glibcxx_requires_string(__s);
1258 : const size_type __n = traits_type::length(__s);
1259 : _M_check_length(size_type(0), __n, "basic_string::append");
1260 : return _M_append(__s, __n);
1261 : }
1262 :
1263 : /**
1264 : * @brief Append multiple characters.
1265 : * @param __n The number of characters to append.
1266 : * @param __c The character to use.
1267 : * @return Reference to this string.
1268 : *
1269 : * Appends __n copies of __c to this string.
1270 : */
1271 : basic_string&
1272 : append(size_type __n, _CharT __c)
1273 : { return _M_replace_aux(this->size(), size_type(0), __n, __c); }
1274 :
1275 : #if __cplusplus >= 201103L
1276 : /**
1277 : * @brief Append an initializer_list of characters.
1278 : * @param __l The initializer_list of characters to append.
1279 : * @return Reference to this string.
1280 : */
1281 : basic_string&
1282 : append(initializer_list<_CharT> __l)
1283 : { return this->append(__l.begin(), __l.size()); }
1284 : #endif // C++11
1285 :
1286 : /**
1287 : * @brief Append a range of characters.
1288 : * @param __first Iterator referencing the first character to append.
1289 : * @param __last Iterator marking the end of the range.
1290 : * @return Reference to this string.
1291 : *
1292 : * Appends characters in the range [__first,__last) to this string.
1293 : */
1294 : #if __cplusplus >= 201103L
1295 : template<class _InputIterator,
1296 : typename = std::_RequireInputIter<_InputIterator>>
1297 : #else
1298 : template<class _InputIterator>
1299 : #endif
1300 : basic_string&
1301 9242 : append(_InputIterator __first, _InputIterator __last)
1302 9242 : { return this->replace(end(), end(), __first, __last); }
1303 :
1304 : #if __cplusplus >= 201703L
1305 : /**
1306 : * @brief Append a string_view.
1307 : * @param __svt An object convertible to string_view to be appended.
1308 : * @return Reference to this string.
1309 : */
1310 : template<typename _Tp>
1311 : _If_sv<_Tp, basic_string&>
1312 20745 : append(const _Tp& __svt)
1313 : {
1314 20745 : __sv_type __sv = __svt;
1315 41490 : return this->append(__sv.data(), __sv.size());
1316 : }
1317 :
1318 : /**
1319 : * @brief Append a range of characters from a string_view.
1320 : * @param __svt An object convertible to string_view to be appended from.
1321 : * @param __pos The position in the string_view to append from.
1322 : * @param __n The number of characters to append from the string_view.
1323 : * @return Reference to this string.
1324 : */
1325 : template<typename _Tp>
1326 : _If_sv<_Tp, basic_string&>
1327 : append(const _Tp& __svt, size_type __pos, size_type __n = npos)
1328 : {
1329 : __sv_type __sv = __svt;
1330 : return _M_append(__sv.data()
1331 : + std::__sv_check(__sv.size(), __pos, "basic_string::append"),
1332 : std::__sv_limit(__sv.size(), __pos, __n));
1333 : }
1334 : #endif // C++17
1335 :
1336 : /**
1337 : * @brief Append a single character.
1338 : * @param __c Character to append.
1339 : */
1340 : void
1341 : push_back(_CharT __c)
1342 : {
1343 : const size_type __size = this->size();
1344 : if (__size + 1 > this->capacity())
1345 : this->_M_mutate(__size, size_type(0), 0, size_type(1));
1346 : traits_type::assign(this->_M_data()[__size], __c);
1347 : this->_M_set_length(__size + 1);
1348 : }
1349 :
1350 : /**
1351 : * @brief Set value to contents of another string.
1352 : * @param __str Source string to use.
1353 : * @return Reference to this string.
1354 : */
1355 : basic_string&
1356 : assign(const basic_string& __str)
1357 : {
1358 : #if __cplusplus >= 201103L
1359 : if (_Alloc_traits::_S_propagate_on_copy_assign())
1360 : {
1361 : if (!_Alloc_traits::_S_always_equal() && !_M_is_local()
1362 : && _M_get_allocator() != __str._M_get_allocator())
1363 : {
1364 : // Propagating allocator cannot free existing storage so must
1365 : // deallocate it before replacing current allocator.
1366 : if (__str.size() <= _S_local_capacity)
1367 : {
1368 : _M_destroy(_M_allocated_capacity);
1369 : _M_data(_M_local_data());
1370 : _M_set_length(0);
1371 : }
1372 : else
1373 : {
1374 : const auto __len = __str.size();
1375 : auto __alloc = __str._M_get_allocator();
1376 : // If this allocation throws there are no effects:
1377 : auto __ptr = _Alloc_traits::allocate(__alloc, __len + 1);
1378 : _M_destroy(_M_allocated_capacity);
1379 : _M_data(__ptr);
1380 : _M_capacity(__len);
1381 : _M_set_length(__len);
1382 : }
1383 : }
1384 : std::__alloc_on_copy(_M_get_allocator(), __str._M_get_allocator());
1385 : }
1386 : #endif
1387 : this->_M_assign(__str);
1388 : return *this;
1389 : }
1390 :
1391 : #if __cplusplus >= 201103L
1392 : /**
1393 : * @brief Set value to contents of another string.
1394 : * @param __str Source string to use.
1395 : * @return Reference to this string.
1396 : *
1397 : * This function sets this string to the exact contents of @a __str.
1398 : * @a __str is a valid, but unspecified string.
1399 : */
1400 : basic_string&
1401 : assign(basic_string&& __str)
1402 : noexcept(_Alloc_traits::_S_nothrow_move())
1403 : {
1404 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
1405 : // 2063. Contradictory requirements for string move assignment
1406 : return *this = std::move(__str);
1407 : }
1408 : #endif // C++11
1409 :
1410 : /**
1411 : * @brief Set value to a substring of a string.
1412 : * @param __str The string to use.
1413 : * @param __pos Index of the first character of str.
1414 : * @param __n Number of characters to use.
1415 : * @return Reference to this string.
1416 : * @throw std::out_of_range if @a pos is not a valid index.
1417 : *
1418 : * This function sets this string to the substring of @a __str
1419 : * consisting of @a __n characters at @a __pos. If @a __n is
1420 : * is larger than the number of available characters in @a
1421 : * __str, the remainder of @a __str is used.
1422 : */
1423 : basic_string&
1424 : assign(const basic_string& __str, size_type __pos, size_type __n = npos)
1425 : { return _M_replace(size_type(0), this->size(), __str._M_data()
1426 : + __str._M_check(__pos, "basic_string::assign"),
1427 : __str._M_limit(__pos, __n)); }
1428 :
1429 : /**
1430 : * @brief Set value to a C substring.
1431 : * @param __s The C string to use.
1432 : * @param __n Number of characters to use.
1433 : * @return Reference to this string.
1434 : *
1435 : * This function sets the value of this string to the first @a __n
1436 : * characters of @a __s. If @a __n is is larger than the number of
1437 : * available characters in @a __s, the remainder of @a __s is used.
1438 : */
1439 : basic_string&
1440 : assign(const _CharT* __s, size_type __n)
1441 : {
1442 : __glibcxx_requires_string_len(__s, __n);
1443 : return _M_replace(size_type(0), this->size(), __s, __n);
1444 : }
1445 :
1446 : /**
1447 : * @brief Set value to contents of a C string.
1448 : * @param __s The C string to use.
1449 : * @return Reference to this string.
1450 : *
1451 : * This function sets the value of this string to the value of @a __s.
1452 : * The data is copied, so there is no dependence on @a __s once the
1453 : * function returns.
1454 : */
1455 : basic_string&
1456 : assign(const _CharT* __s)
1457 : {
1458 : __glibcxx_requires_string(__s);
1459 : return _M_replace(size_type(0), this->size(), __s,
1460 : traits_type::length(__s));
1461 : }
1462 :
1463 : /**
1464 : * @brief Set value to multiple characters.
1465 : * @param __n Length of the resulting string.
1466 : * @param __c The character to use.
1467 : * @return Reference to this string.
1468 : *
1469 : * This function sets the value of this string to @a __n copies of
1470 : * character @a __c.
1471 : */
1472 : basic_string&
1473 : assign(size_type __n, _CharT __c)
1474 : { return _M_replace_aux(size_type(0), this->size(), __n, __c); }
1475 :
1476 : /**
1477 : * @brief Set value to a range of characters.
1478 : * @param __first Iterator referencing the first character to append.
1479 : * @param __last Iterator marking the end of the range.
1480 : * @return Reference to this string.
1481 : *
1482 : * Sets value of string to characters in the range [__first,__last).
1483 : */
1484 : #if __cplusplus >= 201103L
1485 : template<class _InputIterator,
1486 : typename = std::_RequireInputIter<_InputIterator>>
1487 : #else
1488 : template<class _InputIterator>
1489 : #endif
1490 : basic_string&
1491 15 : assign(_InputIterator __first, _InputIterator __last)
1492 15 : { return this->replace(begin(), end(), __first, __last); }
1493 :
1494 : #if __cplusplus >= 201103L
1495 : /**
1496 : * @brief Set value to an initializer_list of characters.
1497 : * @param __l The initializer_list of characters to assign.
1498 : * @return Reference to this string.
1499 : */
1500 : basic_string&
1501 : assign(initializer_list<_CharT> __l)
1502 : { return this->assign(__l.begin(), __l.size()); }
1503 : #endif // C++11
1504 :
1505 : #if __cplusplus >= 201703L
1506 : /**
1507 : * @brief Set value from a string_view.
1508 : * @param __svt The source object convertible to string_view.
1509 : * @return Reference to this string.
1510 : */
1511 : template<typename _Tp>
1512 : _If_sv<_Tp, basic_string&>
1513 53194 : assign(const _Tp& __svt)
1514 : {
1515 53194 : __sv_type __sv = __svt;
1516 106388 : return this->assign(__sv.data(), __sv.size());
1517 : }
1518 :
1519 : /**
1520 : * @brief Set value from a range of characters in a string_view.
1521 : * @param __svt The source object convertible to string_view.
1522 : * @param __pos The position in the string_view to assign from.
1523 : * @param __n The number of characters to assign.
1524 : * @return Reference to this string.
1525 : */
1526 : template<typename _Tp>
1527 : _If_sv<_Tp, basic_string&>
1528 : assign(const _Tp& __svt, size_type __pos, size_type __n = npos)
1529 : {
1530 : __sv_type __sv = __svt;
1531 : return _M_replace(size_type(0), this->size(),
1532 : __sv.data()
1533 : + std::__sv_check(__sv.size(), __pos, "basic_string::assign"),
1534 : std::__sv_limit(__sv.size(), __pos, __n));
1535 : }
1536 : #endif // C++17
1537 :
1538 : #if __cplusplus >= 201103L
1539 : /**
1540 : * @brief Insert multiple characters.
1541 : * @param __p Const_iterator referencing location in string to
1542 : * insert at.
1543 : * @param __n Number of characters to insert
1544 : * @param __c The character to insert.
1545 : * @return Iterator referencing the first inserted char.
1546 : * @throw std::length_error If new length exceeds @c max_size().
1547 : *
1548 : * Inserts @a __n copies of character @a __c starting at the
1549 : * position referenced by iterator @a __p. If adding
1550 : * characters causes the length to exceed max_size(),
1551 : * length_error is thrown. The value of the string doesn't
1552 : * change if an error is thrown.
1553 : */
1554 : iterator
1555 : insert(const_iterator __p, size_type __n, _CharT __c)
1556 : {
1557 : _GLIBCXX_DEBUG_PEDASSERT(__p >= begin() && __p <= end());
1558 : const size_type __pos = __p - begin();
1559 : this->replace(__p, __p, __n, __c);
1560 : return iterator(this->_M_data() + __pos);
1561 : }
1562 : #else
1563 : /**
1564 : * @brief Insert multiple characters.
1565 : * @param __p Iterator referencing location in string to insert at.
1566 : * @param __n Number of characters to insert
1567 : * @param __c The character to insert.
1568 : * @throw std::length_error If new length exceeds @c max_size().
1569 : *
1570 : * Inserts @a __n copies of character @a __c starting at the
1571 : * position referenced by iterator @a __p. If adding
1572 : * characters causes the length to exceed max_size(),
1573 : * length_error is thrown. The value of the string doesn't
1574 : * change if an error is thrown.
1575 : */
1576 : void
1577 : insert(iterator __p, size_type __n, _CharT __c)
1578 : { this->replace(__p, __p, __n, __c); }
1579 : #endif
1580 :
1581 : #if __cplusplus >= 201103L
1582 : /**
1583 : * @brief Insert a range of characters.
1584 : * @param __p Const_iterator referencing location in string to
1585 : * insert at.
1586 : * @param __beg Start of range.
1587 : * @param __end End of range.
1588 : * @return Iterator referencing the first inserted char.
1589 : * @throw std::length_error If new length exceeds @c max_size().
1590 : *
1591 : * Inserts characters in range [beg,end). If adding characters
1592 : * causes the length to exceed max_size(), length_error is
1593 : * thrown. The value of the string doesn't change if an error
1594 : * is thrown.
1595 : */
1596 : template<class _InputIterator,
1597 : typename = std::_RequireInputIter<_InputIterator>>
1598 : iterator
1599 : insert(const_iterator __p, _InputIterator __beg, _InputIterator __end)
1600 : {
1601 : _GLIBCXX_DEBUG_PEDASSERT(__p >= begin() && __p <= end());
1602 : const size_type __pos = __p - begin();
1603 : this->replace(__p, __p, __beg, __end);
1604 : return iterator(this->_M_data() + __pos);
1605 : }
1606 : #else
1607 : /**
1608 : * @brief Insert a range of characters.
1609 : * @param __p Iterator referencing location in string to insert at.
1610 : * @param __beg Start of range.
1611 : * @param __end End of range.
1612 : * @throw std::length_error If new length exceeds @c max_size().
1613 : *
1614 : * Inserts characters in range [__beg,__end). If adding
1615 : * characters causes the length to exceed max_size(),
1616 : * length_error is thrown. The value of the string doesn't
1617 : * change if an error is thrown.
1618 : */
1619 : template<class _InputIterator>
1620 : void
1621 : insert(iterator __p, _InputIterator __beg, _InputIterator __end)
1622 : { this->replace(__p, __p, __beg, __end); }
1623 : #endif
1624 :
1625 : #if __cplusplus >= 201103L
1626 : /**
1627 : * @brief Insert an initializer_list of characters.
1628 : * @param __p Iterator referencing location in string to insert at.
1629 : * @param __l The initializer_list of characters to insert.
1630 : * @throw std::length_error If new length exceeds @c max_size().
1631 : */
1632 : iterator
1633 : insert(const_iterator __p, initializer_list<_CharT> __l)
1634 : { return this->insert(__p, __l.begin(), __l.end()); }
1635 :
1636 : #ifdef _GLIBCXX_DEFINING_STRING_INSTANTIATIONS
1637 : // See PR libstdc++/83328
1638 : void
1639 : insert(iterator __p, initializer_list<_CharT> __l)
1640 : {
1641 : _GLIBCXX_DEBUG_PEDASSERT(__p >= begin() && __p <= end());
1642 : this->insert(__p - begin(), __l.begin(), __l.size());
1643 : }
1644 : #endif
1645 : #endif // C++11
1646 :
1647 : /**
1648 : * @brief Insert value of a string.
1649 : * @param __pos1 Position in string to insert at.
1650 : * @param __str The string to insert.
1651 : * @return Reference to this string.
1652 : * @throw std::length_error If new length exceeds @c max_size().
1653 : *
1654 : * Inserts value of @a __str starting at @a __pos1. If adding
1655 : * characters causes the length to exceed max_size(),
1656 : * length_error is thrown. The value of the string doesn't
1657 : * change if an error is thrown.
1658 : */
1659 : basic_string&
1660 : insert(size_type __pos1, const basic_string& __str)
1661 : { return this->replace(__pos1, size_type(0),
1662 : __str._M_data(), __str.size()); }
1663 :
1664 : /**
1665 : * @brief Insert a substring.
1666 : * @param __pos1 Position in string to insert at.
1667 : * @param __str The string to insert.
1668 : * @param __pos2 Start of characters in str to insert.
1669 : * @param __n Number of characters to insert.
1670 : * @return Reference to this string.
1671 : * @throw std::length_error If new length exceeds @c max_size().
1672 : * @throw std::out_of_range If @a pos1 > size() or
1673 : * @a __pos2 > @a str.size().
1674 : *
1675 : * Starting at @a pos1, insert @a __n character of @a __str
1676 : * beginning with @a __pos2. If adding characters causes the
1677 : * length to exceed max_size(), length_error is thrown. If @a
1678 : * __pos1 is beyond the end of this string or @a __pos2 is
1679 : * beyond the end of @a __str, out_of_range is thrown. The
1680 : * value of the string doesn't change if an error is thrown.
1681 : */
1682 : basic_string&
1683 : insert(size_type __pos1, const basic_string& __str,
1684 : size_type __pos2, size_type __n = npos)
1685 : { return this->replace(__pos1, size_type(0), __str._M_data()
1686 : + __str._M_check(__pos2, "basic_string::insert"),
1687 : __str._M_limit(__pos2, __n)); }
1688 :
1689 : /**
1690 : * @brief Insert a C substring.
1691 : * @param __pos Position in string to insert at.
1692 : * @param __s The C string to insert.
1693 : * @param __n The number of characters to insert.
1694 : * @return Reference to this string.
1695 : * @throw std::length_error If new length exceeds @c max_size().
1696 : * @throw std::out_of_range If @a __pos is beyond the end of this
1697 : * string.
1698 : *
1699 : * Inserts the first @a __n characters of @a __s starting at @a
1700 : * __pos. If adding characters causes the length to exceed
1701 : * max_size(), length_error is thrown. If @a __pos is beyond
1702 : * end(), out_of_range is thrown. The value of the string
1703 : * doesn't change if an error is thrown.
1704 : */
1705 : basic_string&
1706 : insert(size_type __pos, const _CharT* __s, size_type __n)
1707 : { return this->replace(__pos, size_type(0), __s, __n); }
1708 :
1709 : /**
1710 : * @brief Insert a C string.
1711 : * @param __pos Position in string to insert at.
1712 : * @param __s The C string to insert.
1713 : * @return Reference to this string.
1714 : * @throw std::length_error If new length exceeds @c max_size().
1715 : * @throw std::out_of_range If @a pos is beyond the end of this
1716 : * string.
1717 : *
1718 : * Inserts the first @a n characters of @a __s starting at @a __pos. If
1719 : * adding characters causes the length to exceed max_size(),
1720 : * length_error is thrown. If @a __pos is beyond end(), out_of_range is
1721 : * thrown. The value of the string doesn't change if an error is
1722 : * thrown.
1723 : */
1724 : basic_string&
1725 : insert(size_type __pos, const _CharT* __s)
1726 : {
1727 : __glibcxx_requires_string(__s);
1728 : return this->replace(__pos, size_type(0), __s,
1729 : traits_type::length(__s));
1730 : }
1731 :
1732 : /**
1733 : * @brief Insert multiple characters.
1734 : * @param __pos Index in string to insert at.
1735 : * @param __n Number of characters to insert
1736 : * @param __c The character to insert.
1737 : * @return Reference to this string.
1738 : * @throw std::length_error If new length exceeds @c max_size().
1739 : * @throw std::out_of_range If @a __pos is beyond the end of this
1740 : * string.
1741 : *
1742 : * Inserts @a __n copies of character @a __c starting at index
1743 : * @a __pos. If adding characters causes the length to exceed
1744 : * max_size(), length_error is thrown. If @a __pos > length(),
1745 : * out_of_range is thrown. The value of the string doesn't
1746 : * change if an error is thrown.
1747 : */
1748 : basic_string&
1749 : insert(size_type __pos, size_type __n, _CharT __c)
1750 : { return _M_replace_aux(_M_check(__pos, "basic_string::insert"),
1751 : size_type(0), __n, __c); }
1752 :
1753 : /**
1754 : * @brief Insert one character.
1755 : * @param __p Iterator referencing position in string to insert at.
1756 : * @param __c The character to insert.
1757 : * @return Iterator referencing newly inserted char.
1758 : * @throw std::length_error If new length exceeds @c max_size().
1759 : *
1760 : * Inserts character @a __c at position referenced by @a __p.
1761 : * If adding character causes the length to exceed max_size(),
1762 : * length_error is thrown. If @a __p is beyond end of string,
1763 : * out_of_range is thrown. The value of the string doesn't
1764 : * change if an error is thrown.
1765 : */
1766 : iterator
1767 : insert(__const_iterator __p, _CharT __c)
1768 : {
1769 : _GLIBCXX_DEBUG_PEDASSERT(__p >= begin() && __p <= end());
1770 : const size_type __pos = __p - begin();
1771 : _M_replace_aux(__pos, size_type(0), size_type(1), __c);
1772 : return iterator(_M_data() + __pos);
1773 : }
1774 :
1775 : #if __cplusplus >= 201703L
1776 : /**
1777 : * @brief Insert a string_view.
1778 : * @param __pos Position in string to insert at.
1779 : * @param __svt The object convertible to string_view to insert.
1780 : * @return Reference to this string.
1781 : */
1782 : template<typename _Tp>
1783 : _If_sv<_Tp, basic_string&>
1784 : insert(size_type __pos, const _Tp& __svt)
1785 : {
1786 : __sv_type __sv = __svt;
1787 : return this->insert(__pos, __sv.data(), __sv.size());
1788 : }
1789 :
1790 : /**
1791 : * @brief Insert a string_view.
1792 : * @param __pos1 Position in string to insert at.
1793 : * @param __svt The object convertible to string_view to insert from.
1794 : * @param __pos2 Start of characters in str to insert.
1795 : * @param __n The number of characters to insert.
1796 : * @return Reference to this string.
1797 : */
1798 : template<typename _Tp>
1799 : _If_sv<_Tp, basic_string&>
1800 : insert(size_type __pos1, const _Tp& __svt,
1801 : size_type __pos2, size_type __n = npos)
1802 : {
1803 : __sv_type __sv = __svt;
1804 : return this->replace(__pos1, size_type(0),
1805 : __sv.data()
1806 : + std::__sv_check(__sv.size(), __pos2, "basic_string::insert"),
1807 : std::__sv_limit(__sv.size(), __pos2, __n));
1808 : }
1809 : #endif // C++17
1810 :
1811 : /**
1812 : * @brief Remove characters.
1813 : * @param __pos Index of first character to remove (default 0).
1814 : * @param __n Number of characters to remove (default remainder).
1815 : * @return Reference to this string.
1816 : * @throw std::out_of_range If @a pos is beyond the end of this
1817 : * string.
1818 : *
1819 : * Removes @a __n characters from this string starting at @a
1820 : * __pos. The length of the string is reduced by @a __n. If
1821 : * there are < @a __n characters to remove, the remainder of
1822 : * the string is truncated. If @a __p is beyond end of string,
1823 : * out_of_range is thrown. The value of the string doesn't
1824 : * change if an error is thrown.
1825 : */
1826 : basic_string&
1827 : erase(size_type __pos = 0, size_type __n = npos)
1828 : {
1829 : _M_check(__pos, "basic_string::erase");
1830 : if (__n == npos)
1831 : this->_M_set_length(__pos);
1832 : else if (__n != 0)
1833 : this->_M_erase(__pos, _M_limit(__pos, __n));
1834 : return *this;
1835 : }
1836 :
1837 : /**
1838 : * @brief Remove one character.
1839 : * @param __position Iterator referencing the character to remove.
1840 : * @return iterator referencing same location after removal.
1841 : *
1842 : * Removes the character at @a __position from this string. The value
1843 : * of the string doesn't change if an error is thrown.
1844 : */
1845 : iterator
1846 : erase(__const_iterator __position)
1847 : {
1848 : _GLIBCXX_DEBUG_PEDASSERT(__position >= begin()
1849 : && __position < end());
1850 : const size_type __pos = __position - begin();
1851 : this->_M_erase(__pos, size_type(1));
1852 : return iterator(_M_data() + __pos);
1853 : }
1854 :
1855 : /**
1856 : * @brief Remove a range of characters.
1857 : * @param __first Iterator referencing the first character to remove.
1858 : * @param __last Iterator referencing the end of the range.
1859 : * @return Iterator referencing location of first after removal.
1860 : *
1861 : * Removes the characters in the range [first,last) from this string.
1862 : * The value of the string doesn't change if an error is thrown.
1863 : */
1864 : iterator
1865 : erase(__const_iterator __first, __const_iterator __last)
1866 : {
1867 : _GLIBCXX_DEBUG_PEDASSERT(__first >= begin() && __first <= __last
1868 : && __last <= end());
1869 : const size_type __pos = __first - begin();
1870 : if (__last == end())
1871 : this->_M_set_length(__pos);
1872 : else
1873 : this->_M_erase(__pos, __last - __first);
1874 : return iterator(this->_M_data() + __pos);
1875 : }
1876 :
1877 : #if __cplusplus >= 201103L
1878 : /**
1879 : * @brief Remove the last character.
1880 : *
1881 : * The string must be non-empty.
1882 : */
1883 : void
1884 : pop_back() noexcept
1885 : {
1886 : __glibcxx_assert(!empty());
1887 : _M_erase(size() - 1, 1);
1888 : }
1889 : #endif // C++11
1890 :
1891 : /**
1892 : * @brief Replace characters with value from another string.
1893 : * @param __pos Index of first character to replace.
1894 : * @param __n Number of characters to be replaced.
1895 : * @param __str String to insert.
1896 : * @return Reference to this string.
1897 : * @throw std::out_of_range If @a pos is beyond the end of this
1898 : * string.
1899 : * @throw std::length_error If new length exceeds @c max_size().
1900 : *
1901 : * Removes the characters in the range [__pos,__pos+__n) from
1902 : * this string. In place, the value of @a __str is inserted.
1903 : * If @a __pos is beyond end of string, out_of_range is thrown.
1904 : * If the length of the result exceeds max_size(), length_error
1905 : * is thrown. The value of the string doesn't change if an
1906 : * error is thrown.
1907 : */
1908 : basic_string&
1909 : replace(size_type __pos, size_type __n, const basic_string& __str)
1910 : { return this->replace(__pos, __n, __str._M_data(), __str.size()); }
1911 :
1912 : /**
1913 : * @brief Replace characters with value from another string.
1914 : * @param __pos1 Index of first character to replace.
1915 : * @param __n1 Number of characters to be replaced.
1916 : * @param __str String to insert.
1917 : * @param __pos2 Index of first character of str to use.
1918 : * @param __n2 Number of characters from str to use.
1919 : * @return Reference to this string.
1920 : * @throw std::out_of_range If @a __pos1 > size() or @a __pos2 >
1921 : * __str.size().
1922 : * @throw std::length_error If new length exceeds @c max_size().
1923 : *
1924 : * Removes the characters in the range [__pos1,__pos1 + n) from this
1925 : * string. In place, the value of @a __str is inserted. If @a __pos is
1926 : * beyond end of string, out_of_range is thrown. If the length of the
1927 : * result exceeds max_size(), length_error is thrown. The value of the
1928 : * string doesn't change if an error is thrown.
1929 : */
1930 : basic_string&
1931 : replace(size_type __pos1, size_type __n1, const basic_string& __str,
1932 : size_type __pos2, size_type __n2 = npos)
1933 : { return this->replace(__pos1, __n1, __str._M_data()
1934 : + __str._M_check(__pos2, "basic_string::replace"),
1935 : __str._M_limit(__pos2, __n2)); }
1936 :
1937 : /**
1938 : * @brief Replace characters with value of a C substring.
1939 : * @param __pos Index of first character to replace.
1940 : * @param __n1 Number of characters to be replaced.
1941 : * @param __s C string to insert.
1942 : * @param __n2 Number of characters from @a s to use.
1943 : * @return Reference to this string.
1944 : * @throw std::out_of_range If @a pos1 > size().
1945 : * @throw std::length_error If new length exceeds @c max_size().
1946 : *
1947 : * Removes the characters in the range [__pos,__pos + __n1)
1948 : * from this string. In place, the first @a __n2 characters of
1949 : * @a __s are inserted, or all of @a __s if @a __n2 is too large. If
1950 : * @a __pos is beyond end of string, out_of_range is thrown. If
1951 : * the length of result exceeds max_size(), length_error is
1952 : * thrown. The value of the string doesn't change if an error
1953 : * is thrown.
1954 : */
1955 : basic_string&
1956 : replace(size_type __pos, size_type __n1, const _CharT* __s,
1957 : size_type __n2)
1958 : {
1959 : __glibcxx_requires_string_len(__s, __n2);
1960 : return _M_replace(_M_check(__pos, "basic_string::replace"),
1961 : _M_limit(__pos, __n1), __s, __n2);
1962 : }
1963 :
1964 : /**
1965 : * @brief Replace characters with value of a C string.
1966 : * @param __pos Index of first character to replace.
1967 : * @param __n1 Number of characters to be replaced.
1968 : * @param __s C string to insert.
1969 : * @return Reference to this string.
1970 : * @throw std::out_of_range If @a pos > size().
1971 : * @throw std::length_error If new length exceeds @c max_size().
1972 : *
1973 : * Removes the characters in the range [__pos,__pos + __n1)
1974 : * from this string. In place, the characters of @a __s are
1975 : * inserted. If @a __pos is beyond end of string, out_of_range
1976 : * is thrown. If the length of result exceeds max_size(),
1977 : * length_error is thrown. The value of the string doesn't
1978 : * change if an error is thrown.
1979 : */
1980 : basic_string&
1981 : replace(size_type __pos, size_type __n1, const _CharT* __s)
1982 : {
1983 : __glibcxx_requires_string(__s);
1984 : return this->replace(__pos, __n1, __s, traits_type::length(__s));
1985 : }
1986 :
1987 : /**
1988 : * @brief Replace characters with multiple characters.
1989 : * @param __pos Index of first character to replace.
1990 : * @param __n1 Number of characters to be replaced.
1991 : * @param __n2 Number of characters to insert.
1992 : * @param __c Character to insert.
1993 : * @return Reference to this string.
1994 : * @throw std::out_of_range If @a __pos > size().
1995 : * @throw std::length_error If new length exceeds @c max_size().
1996 : *
1997 : * Removes the characters in the range [pos,pos + n1) from this
1998 : * string. In place, @a __n2 copies of @a __c are inserted.
1999 : * If @a __pos is beyond end of string, out_of_range is thrown.
2000 : * If the length of result exceeds max_size(), length_error is
2001 : * thrown. The value of the string doesn't change if an error
2002 : * is thrown.
2003 : */
2004 : basic_string&
2005 : replace(size_type __pos, size_type __n1, size_type __n2, _CharT __c)
2006 : { return _M_replace_aux(_M_check(__pos, "basic_string::replace"),
2007 : _M_limit(__pos, __n1), __n2, __c); }
2008 :
2009 : /**
2010 : * @brief Replace range of characters with string.
2011 : * @param __i1 Iterator referencing start of range to replace.
2012 : * @param __i2 Iterator referencing end of range to replace.
2013 : * @param __str String value to insert.
2014 : * @return Reference to this string.
2015 : * @throw std::length_error If new length exceeds @c max_size().
2016 : *
2017 : * Removes the characters in the range [__i1,__i2). In place,
2018 : * the value of @a __str is inserted. If the length of result
2019 : * exceeds max_size(), length_error is thrown. The value of
2020 : * the string doesn't change if an error is thrown.
2021 : */
2022 : basic_string&
2023 : replace(__const_iterator __i1, __const_iterator __i2,
2024 : const basic_string& __str)
2025 : { return this->replace(__i1, __i2, __str._M_data(), __str.size()); }
2026 :
2027 : /**
2028 : * @brief Replace range of characters with C substring.
2029 : * @param __i1 Iterator referencing start of range to replace.
2030 : * @param __i2 Iterator referencing end of range to replace.
2031 : * @param __s C string value to insert.
2032 : * @param __n Number of characters from s to insert.
2033 : * @return Reference to this string.
2034 : * @throw std::length_error If new length exceeds @c max_size().
2035 : *
2036 : * Removes the characters in the range [__i1,__i2). In place,
2037 : * the first @a __n characters of @a __s are inserted. If the
2038 : * length of result exceeds max_size(), length_error is thrown.
2039 : * The value of the string doesn't change if an error is
2040 : * thrown.
2041 : */
2042 : basic_string&
2043 : replace(__const_iterator __i1, __const_iterator __i2,
2044 : const _CharT* __s, size_type __n)
2045 : {
2046 : _GLIBCXX_DEBUG_PEDASSERT(begin() <= __i1 && __i1 <= __i2
2047 : && __i2 <= end());
2048 : return this->replace(__i1 - begin(), __i2 - __i1, __s, __n);
2049 : }
2050 :
2051 : /**
2052 : * @brief Replace range of characters with C string.
2053 : * @param __i1 Iterator referencing start of range to replace.
2054 : * @param __i2 Iterator referencing end of range to replace.
2055 : * @param __s C string value to insert.
2056 : * @return Reference to this string.
2057 : * @throw std::length_error If new length exceeds @c max_size().
2058 : *
2059 : * Removes the characters in the range [__i1,__i2). In place,
2060 : * the characters of @a __s are inserted. If the length of
2061 : * result exceeds max_size(), length_error is thrown. The
2062 : * value of the string doesn't change if an error is thrown.
2063 : */
2064 : basic_string&
2065 : replace(__const_iterator __i1, __const_iterator __i2, const _CharT* __s)
2066 : {
2067 : __glibcxx_requires_string(__s);
2068 : return this->replace(__i1, __i2, __s, traits_type::length(__s));
2069 : }
2070 :
2071 : /**
2072 : * @brief Replace range of characters with multiple characters
2073 : * @param __i1 Iterator referencing start of range to replace.
2074 : * @param __i2 Iterator referencing end of range to replace.
2075 : * @param __n Number of characters to insert.
2076 : * @param __c Character to insert.
2077 : * @return Reference to this string.
2078 : * @throw std::length_error If new length exceeds @c max_size().
2079 : *
2080 : * Removes the characters in the range [__i1,__i2). In place,
2081 : * @a __n copies of @a __c are inserted. If the length of
2082 : * result exceeds max_size(), length_error is thrown. The
2083 : * value of the string doesn't change if an error is thrown.
2084 : */
2085 : basic_string&
2086 : replace(__const_iterator __i1, __const_iterator __i2, size_type __n,
2087 : _CharT __c)
2088 : {
2089 : _GLIBCXX_DEBUG_PEDASSERT(begin() <= __i1 && __i1 <= __i2
2090 : && __i2 <= end());
2091 : return _M_replace_aux(__i1 - begin(), __i2 - __i1, __n, __c);
2092 : }
2093 :
2094 : /**
2095 : * @brief Replace range of characters with range.
2096 : * @param __i1 Iterator referencing start of range to replace.
2097 : * @param __i2 Iterator referencing end of range to replace.
2098 : * @param __k1 Iterator referencing start of range to insert.
2099 : * @param __k2 Iterator referencing end of range to insert.
2100 : * @return Reference to this string.
2101 : * @throw std::length_error If new length exceeds @c max_size().
2102 : *
2103 : * Removes the characters in the range [__i1,__i2). In place,
2104 : * characters in the range [__k1,__k2) are inserted. If the
2105 : * length of result exceeds max_size(), length_error is thrown.
2106 : * The value of the string doesn't change if an error is
2107 : * thrown.
2108 : */
2109 : #if __cplusplus >= 201103L
2110 : template<class _InputIterator,
2111 : typename = std::_RequireInputIter<_InputIterator>>
2112 : basic_string&
2113 15 : replace(const_iterator __i1, const_iterator __i2,
2114 : _InputIterator __k1, _InputIterator __k2)
2115 : {
2116 : _GLIBCXX_DEBUG_PEDASSERT(begin() <= __i1 && __i1 <= __i2
2117 : && __i2 <= end());
2118 : __glibcxx_requires_valid_range(__k1, __k2);
2119 15 : return this->_M_replace_dispatch(__i1, __i2, __k1, __k2,
2120 15 : std::__false_type());
2121 : }
2122 : #else
2123 : template<class _InputIterator>
2124 : #ifdef _GLIBCXX_DISAMBIGUATE_REPLACE_INST
2125 : typename __enable_if_not_native_iterator<_InputIterator>::__type
2126 : #else
2127 : basic_string&
2128 : #endif
2129 : replace(iterator __i1, iterator __i2,
2130 : _InputIterator __k1, _InputIterator __k2)
2131 : {
2132 : _GLIBCXX_DEBUG_PEDASSERT(begin() <= __i1 && __i1 <= __i2
2133 : && __i2 <= end());
2134 : __glibcxx_requires_valid_range(__k1, __k2);
2135 : typedef typename std::__is_integer<_InputIterator>::__type _Integral;
2136 : return _M_replace_dispatch(__i1, __i2, __k1, __k2, _Integral());
2137 : }
2138 : #endif
2139 :
2140 : // Specializations for the common case of pointer and iterator:
2141 : // useful to avoid the overhead of temporary buffering in _M_replace.
2142 : basic_string&
2143 : replace(__const_iterator __i1, __const_iterator __i2,
2144 : _CharT* __k1, _CharT* __k2)
2145 : {
2146 : _GLIBCXX_DEBUG_PEDASSERT(begin() <= __i1 && __i1 <= __i2
2147 : && __i2 <= end());
2148 : __glibcxx_requires_valid_range(__k1, __k2);
2149 : return this->replace(__i1 - begin(), __i2 - __i1,
2150 : __k1, __k2 - __k1);
2151 : }
2152 :
2153 : basic_string&
2154 : replace(__const_iterator __i1, __const_iterator __i2,
2155 : const _CharT* __k1, const _CharT* __k2)
2156 : {
2157 : _GLIBCXX_DEBUG_PEDASSERT(begin() <= __i1 && __i1 <= __i2
2158 : && __i2 <= end());
2159 : __glibcxx_requires_valid_range(__k1, __k2);
2160 : return this->replace(__i1 - begin(), __i2 - __i1,
2161 : __k1, __k2 - __k1);
2162 : }
2163 :
2164 : basic_string&
2165 : replace(__const_iterator __i1, __const_iterator __i2,
2166 : iterator __k1, iterator __k2)
2167 : {
2168 : _GLIBCXX_DEBUG_PEDASSERT(begin() <= __i1 && __i1 <= __i2
2169 : && __i2 <= end());
2170 : __glibcxx_requires_valid_range(__k1, __k2);
2171 : return this->replace(__i1 - begin(), __i2 - __i1,
2172 : __k1.base(), __k2 - __k1);
2173 : }
2174 :
2175 : basic_string&
2176 : replace(__const_iterator __i1, __const_iterator __i2,
2177 : const_iterator __k1, const_iterator __k2)
2178 : {
2179 : _GLIBCXX_DEBUG_PEDASSERT(begin() <= __i1 && __i1 <= __i2
2180 : && __i2 <= end());
2181 : __glibcxx_requires_valid_range(__k1, __k2);
2182 : return this->replace(__i1 - begin(), __i2 - __i1,
2183 : __k1.base(), __k2 - __k1);
2184 : }
2185 :
2186 : #if __cplusplus >= 201103L
2187 : /**
2188 : * @brief Replace range of characters with initializer_list.
2189 : * @param __i1 Iterator referencing start of range to replace.
2190 : * @param __i2 Iterator referencing end of range to replace.
2191 : * @param __l The initializer_list of characters to insert.
2192 : * @return Reference to this string.
2193 : * @throw std::length_error If new length exceeds @c max_size().
2194 : *
2195 : * Removes the characters in the range [__i1,__i2). In place,
2196 : * characters in the range [__k1,__k2) are inserted. If the
2197 : * length of result exceeds max_size(), length_error is thrown.
2198 : * The value of the string doesn't change if an error is
2199 : * thrown.
2200 : */
2201 : basic_string& replace(const_iterator __i1, const_iterator __i2,
2202 : initializer_list<_CharT> __l)
2203 : { return this->replace(__i1, __i2, __l.begin(), __l.size()); }
2204 : #endif // C++11
2205 :
2206 : #if __cplusplus >= 201703L
2207 : /**
2208 : * @brief Replace range of characters with string_view.
2209 : * @param __pos The position to replace at.
2210 : * @param __n The number of characters to replace.
2211 : * @param __svt The object convertible to string_view to insert.
2212 : * @return Reference to this string.
2213 : */
2214 : template<typename _Tp>
2215 : _If_sv<_Tp, basic_string&>
2216 : replace(size_type __pos, size_type __n, const _Tp& __svt)
2217 : {
2218 : __sv_type __sv = __svt;
2219 : return this->replace(__pos, __n, __sv.data(), __sv.size());
2220 : }
2221 :
2222 : /**
2223 : * @brief Replace range of characters with string_view.
2224 : * @param __pos1 The position to replace at.
2225 : * @param __n1 The number of characters to replace.
2226 : * @param __svt The object convertible to string_view to insert from.
2227 : * @param __pos2 The position in the string_view to insert from.
2228 : * @param __n2 The number of characters to insert.
2229 : * @return Reference to this string.
2230 : */
2231 : template<typename _Tp>
2232 : _If_sv<_Tp, basic_string&>
2233 : replace(size_type __pos1, size_type __n1, const _Tp& __svt,
2234 : size_type __pos2, size_type __n2 = npos)
2235 : {
2236 : __sv_type __sv = __svt;
2237 : return this->replace(__pos1, __n1,
2238 : __sv.data()
2239 : + std::__sv_check(__sv.size(), __pos2, "basic_string::replace"),
2240 : std::__sv_limit(__sv.size(), __pos2, __n2));
2241 : }
2242 :
2243 : /**
2244 : * @brief Replace range of characters with string_view.
2245 : * @param __i1 An iterator referencing the start position
2246 : to replace at.
2247 : * @param __i2 An iterator referencing the end position
2248 : for the replace.
2249 : * @param __svt The object convertible to string_view to insert from.
2250 : * @return Reference to this string.
2251 : */
2252 : template<typename _Tp>
2253 : _If_sv<_Tp, basic_string&>
2254 : replace(const_iterator __i1, const_iterator __i2, const _Tp& __svt)
2255 : {
2256 : __sv_type __sv = __svt;
2257 : return this->replace(__i1 - begin(), __i2 - __i1, __sv);
2258 : }
2259 : #endif // C++17
2260 :
2261 : private:
2262 : template<class _Integer>
2263 : basic_string&
2264 : _M_replace_dispatch(const_iterator __i1, const_iterator __i2,
2265 : _Integer __n, _Integer __val, __true_type)
2266 : { return _M_replace_aux(__i1 - begin(), __i2 - __i1, __n, __val); }
2267 :
2268 : template<class _InputIterator>
2269 : basic_string&
2270 : _M_replace_dispatch(const_iterator __i1, const_iterator __i2,
2271 : _InputIterator __k1, _InputIterator __k2,
2272 : __false_type);
2273 :
2274 : basic_string&
2275 : _M_replace_aux(size_type __pos1, size_type __n1, size_type __n2,
2276 : _CharT __c);
2277 :
2278 : basic_string&
2279 : _M_replace(size_type __pos, size_type __len1, const _CharT* __s,
2280 : const size_type __len2);
2281 :
2282 : basic_string&
2283 : _M_append(const _CharT* __s, size_type __n);
2284 :
2285 : public:
2286 :
2287 : /**
2288 : * @brief Copy substring into C string.
2289 : * @param __s C string to copy value into.
2290 : * @param __n Number of characters to copy.
2291 : * @param __pos Index of first character to copy.
2292 : * @return Number of characters actually copied
2293 : * @throw std::out_of_range If __pos > size().
2294 : *
2295 : * Copies up to @a __n characters starting at @a __pos into the
2296 : * C string @a __s. If @a __pos is %greater than size(),
2297 : * out_of_range is thrown.
2298 : */
2299 : size_type
2300 : copy(_CharT* __s, size_type __n, size_type __pos = 0) const;
2301 :
2302 : /**
2303 : * @brief Swap contents with another string.
2304 : * @param __s String to swap with.
2305 : *
2306 : * Exchanges the contents of this string with that of @a __s in constant
2307 : * time.
2308 : */
2309 : void
2310 : swap(basic_string& __s) _GLIBCXX_NOEXCEPT;
2311 :
2312 : // String operations:
2313 : /**
2314 : * @brief Return const pointer to null-terminated contents.
2315 : *
2316 : * This is a handle to internal data. Do not modify or dire things may
2317 : * happen.
2318 : */
2319 : const _CharT*
2320 : c_str() const _GLIBCXX_NOEXCEPT
2321 : { return _M_data(); }
2322 :
2323 : /**
2324 : * @brief Return const pointer to contents.
2325 : *
2326 : * This is a pointer to internal data. It is undefined to modify
2327 : * the contents through the returned pointer. To get a pointer that
2328 : * allows modifying the contents use @c &str[0] instead,
2329 : * (or in C++17 the non-const @c str.data() overload).
2330 : */
2331 : const _CharT*
2332 : data() const _GLIBCXX_NOEXCEPT
2333 : { return _M_data(); }
2334 :
2335 : #if __cplusplus >= 201703L
2336 : /**
2337 : * @brief Return non-const pointer to contents.
2338 : *
2339 : * This is a pointer to the character sequence held by the string.
2340 : * Modifying the characters in the sequence is allowed.
2341 : */
2342 : _CharT*
2343 : data() noexcept
2344 : { return _M_data(); }
2345 : #endif
2346 :
2347 : /**
2348 : * @brief Return copy of allocator used to construct this string.
2349 : */
2350 : allocator_type
2351 : get_allocator() const _GLIBCXX_NOEXCEPT
2352 : { return _M_get_allocator(); }
2353 :
2354 : /**
2355 : * @brief Find position of a C substring.
2356 : * @param __s C string to locate.
2357 : * @param __pos Index of character to search from.
2358 : * @param __n Number of characters from @a s to search for.
2359 : * @return Index of start of first occurrence.
2360 : *
2361 : * Starting from @a __pos, searches forward for the first @a
2362 : * __n characters in @a __s within this string. If found,
2363 : * returns the index where it begins. If not found, returns
2364 : * npos.
2365 : */
2366 : size_type
2367 : find(const _CharT* __s, size_type __pos, size_type __n) const
2368 : _GLIBCXX_NOEXCEPT;
2369 :
2370 : /**
2371 : * @brief Find position of a string.
2372 : * @param __str String to locate.
2373 : * @param __pos Index of character to search from (default 0).
2374 : * @return Index of start of first occurrence.
2375 : *
2376 : * Starting from @a __pos, searches forward for value of @a __str within
2377 : * this string. If found, returns the index where it begins. If not
2378 : * found, returns npos.
2379 : */
2380 : size_type
2381 : find(const basic_string& __str, size_type __pos = 0) const
2382 : _GLIBCXX_NOEXCEPT
2383 : { return this->find(__str.data(), __pos, __str.size()); }
2384 :
2385 : #if __cplusplus >= 201703L
2386 : /**
2387 : * @brief Find position of a string_view.
2388 : * @param __svt The object convertible to string_view to locate.
2389 : * @param __pos Index of character to search from (default 0).
2390 : * @return Index of start of first occurrence.
2391 : */
2392 : template<typename _Tp>
2393 : _If_sv<_Tp, size_type>
2394 181 : find(const _Tp& __svt, size_type __pos = 0) const
2395 : noexcept(is_same<_Tp, __sv_type>::value)
2396 : {
2397 181 : __sv_type __sv = __svt;
2398 181 : return this->find(__sv.data(), __pos, __sv.size());
2399 : }
2400 : #endif // C++17
2401 :
2402 : /**
2403 : * @brief Find position of a C string.
2404 : * @param __s C string to locate.
2405 : * @param __pos Index of character to search from (default 0).
2406 : * @return Index of start of first occurrence.
2407 : *
2408 : * Starting from @a __pos, searches forward for the value of @a
2409 : * __s within this string. If found, returns the index where
2410 : * it begins. If not found, returns npos.
2411 : */
2412 : size_type
2413 : find(const _CharT* __s, size_type __pos = 0) const _GLIBCXX_NOEXCEPT
2414 : {
2415 : __glibcxx_requires_string(__s);
2416 : return this->find(__s, __pos, traits_type::length(__s));
2417 : }
2418 :
2419 : /**
2420 : * @brief Find position of a character.
2421 : * @param __c Character to locate.
2422 : * @param __pos Index of character to search from (default 0).
2423 : * @return Index of first occurrence.
2424 : *
2425 : * Starting from @a __pos, searches forward for @a __c within
2426 : * this string. If found, returns the index where it was
2427 : * found. If not found, returns npos.
2428 : */
2429 : size_type
2430 : find(_CharT __c, size_type __pos = 0) const _GLIBCXX_NOEXCEPT;
2431 :
2432 : /**
2433 : * @brief Find last position of a string.
2434 : * @param __str String to locate.
2435 : * @param __pos Index of character to search back from (default end).
2436 : * @return Index of start of last occurrence.
2437 : *
2438 : * Starting from @a __pos, searches backward for value of @a
2439 : * __str within this string. If found, returns the index where
2440 : * it begins. If not found, returns npos.
2441 : */
2442 : size_type
2443 : rfind(const basic_string& __str, size_type __pos = npos) const
2444 : _GLIBCXX_NOEXCEPT
2445 : { return this->rfind(__str.data(), __pos, __str.size()); }
2446 :
2447 : #if __cplusplus >= 201703L
2448 : /**
2449 : * @brief Find last position of a string_view.
2450 : * @param __svt The object convertible to string_view to locate.
2451 : * @param __pos Index of character to search back from (default end).
2452 : * @return Index of start of last occurrence.
2453 : */
2454 : template<typename _Tp>
2455 : _If_sv<_Tp, size_type>
2456 : rfind(const _Tp& __svt, size_type __pos = npos) const
2457 : noexcept(is_same<_Tp, __sv_type>::value)
2458 : {
2459 : __sv_type __sv = __svt;
2460 : return this->rfind(__sv.data(), __pos, __sv.size());
2461 : }
2462 : #endif // C++17
2463 :
2464 : /**
2465 : * @brief Find last position of a C substring.
2466 : * @param __s C string to locate.
2467 : * @param __pos Index of character to search back from.
2468 : * @param __n Number of characters from s to search for.
2469 : * @return Index of start of last occurrence.
2470 : *
2471 : * Starting from @a __pos, searches backward for the first @a
2472 : * __n characters in @a __s within this string. If found,
2473 : * returns the index where it begins. If not found, returns
2474 : * npos.
2475 : */
2476 : size_type
2477 : rfind(const _CharT* __s, size_type __pos, size_type __n) const
2478 : _GLIBCXX_NOEXCEPT;
2479 :
2480 : /**
2481 : * @brief Find last position of a C string.
2482 : * @param __s C string to locate.
2483 : * @param __pos Index of character to start search at (default end).
2484 : * @return Index of start of last occurrence.
2485 : *
2486 : * Starting from @a __pos, searches backward for the value of
2487 : * @a __s within this string. If found, returns the index
2488 : * where it begins. If not found, returns npos.
2489 : */
2490 : size_type
2491 : rfind(const _CharT* __s, size_type __pos = npos) const
2492 : {
2493 : __glibcxx_requires_string(__s);
2494 : return this->rfind(__s, __pos, traits_type::length(__s));
2495 : }
2496 :
2497 : /**
2498 : * @brief Find last position of a character.
2499 : * @param __c Character to locate.
2500 : * @param __pos Index of character to search back from (default end).
2501 : * @return Index of last occurrence.
2502 : *
2503 : * Starting from @a __pos, searches backward for @a __c within
2504 : * this string. If found, returns the index where it was
2505 : * found. If not found, returns npos.
2506 : */
2507 : size_type
2508 : rfind(_CharT __c, size_type __pos = npos) const _GLIBCXX_NOEXCEPT;
2509 :
2510 : /**
2511 : * @brief Find position of a character of string.
2512 : * @param __str String containing characters to locate.
2513 : * @param __pos Index of character to search from (default 0).
2514 : * @return Index of first occurrence.
2515 : *
2516 : * Starting from @a __pos, searches forward for one of the
2517 : * characters of @a __str within this string. If found,
2518 : * returns the index where it was found. If not found, returns
2519 : * npos.
2520 : */
2521 : size_type
2522 : find_first_of(const basic_string& __str, size_type __pos = 0) const
2523 : _GLIBCXX_NOEXCEPT
2524 : { return this->find_first_of(__str.data(), __pos, __str.size()); }
2525 :
2526 : #if __cplusplus >= 201703L
2527 : /**
2528 : * @brief Find position of a character of a string_view.
2529 : * @param __svt An object convertible to string_view containing
2530 : * characters to locate.
2531 : * @param __pos Index of character to search from (default 0).
2532 : * @return Index of first occurrence.
2533 : */
2534 : template<typename _Tp>
2535 : _If_sv<_Tp, size_type>
2536 : find_first_of(const _Tp& __svt, size_type __pos = 0) const
2537 : noexcept(is_same<_Tp, __sv_type>::value)
2538 : {
2539 : __sv_type __sv = __svt;
2540 : return this->find_first_of(__sv.data(), __pos, __sv.size());
2541 : }
2542 : #endif // C++17
2543 :
2544 : /**
2545 : * @brief Find position of a character of C substring.
2546 : * @param __s String containing characters to locate.
2547 : * @param __pos Index of character to search from.
2548 : * @param __n Number of characters from s to search for.
2549 : * @return Index of first occurrence.
2550 : *
2551 : * Starting from @a __pos, searches forward for one of the
2552 : * first @a __n characters of @a __s within this string. If
2553 : * found, returns the index where it was found. If not found,
2554 : * returns npos.
2555 : */
2556 : size_type
2557 : find_first_of(const _CharT* __s, size_type __pos, size_type __n) const
2558 : _GLIBCXX_NOEXCEPT;
2559 :
2560 : /**
2561 : * @brief Find position of a character of C string.
2562 : * @param __s String containing characters to locate.
2563 : * @param __pos Index of character to search from (default 0).
2564 : * @return Index of first occurrence.
2565 : *
2566 : * Starting from @a __pos, searches forward for one of the
2567 : * characters of @a __s within this string. If found, returns
2568 : * the index where it was found. If not found, returns npos.
2569 : */
2570 : size_type
2571 : find_first_of(const _CharT* __s, size_type __pos = 0) const
2572 : _GLIBCXX_NOEXCEPT
2573 : {
2574 : __glibcxx_requires_string(__s);
2575 : return this->find_first_of(__s, __pos, traits_type::length(__s));
2576 : }
2577 :
2578 : /**
2579 : * @brief Find position of a character.
2580 : * @param __c Character to locate.
2581 : * @param __pos Index of character to search from (default 0).
2582 : * @return Index of first occurrence.
2583 : *
2584 : * Starting from @a __pos, searches forward for the character
2585 : * @a __c within this string. If found, returns the index
2586 : * where it was found. If not found, returns npos.
2587 : *
2588 : * Note: equivalent to find(__c, __pos).
2589 : */
2590 : size_type
2591 : find_first_of(_CharT __c, size_type __pos = 0) const _GLIBCXX_NOEXCEPT
2592 : { return this->find(__c, __pos); }
2593 :
2594 : /**
2595 : * @brief Find last position of a character of string.
2596 : * @param __str String containing characters to locate.
2597 : * @param __pos Index of character to search back from (default end).
2598 : * @return Index of last occurrence.
2599 : *
2600 : * Starting from @a __pos, searches backward for one of the
2601 : * characters of @a __str within this string. If found,
2602 : * returns the index where it was found. If not found, returns
2603 : * npos.
2604 : */
2605 : size_type
2606 : find_last_of(const basic_string& __str, size_type __pos = npos) const
2607 : _GLIBCXX_NOEXCEPT
2608 : { return this->find_last_of(__str.data(), __pos, __str.size()); }
2609 :
2610 : #if __cplusplus >= 201703L
2611 : /**
2612 : * @brief Find last position of a character of string.
2613 : * @param __svt An object convertible to string_view containing
2614 : * characters to locate.
2615 : * @param __pos Index of character to search back from (default end).
2616 : * @return Index of last occurrence.
2617 : */
2618 : template<typename _Tp>
2619 : _If_sv<_Tp, size_type>
2620 : find_last_of(const _Tp& __svt, size_type __pos = npos) const
2621 : noexcept(is_same<_Tp, __sv_type>::value)
2622 : {
2623 : __sv_type __sv = __svt;
2624 : return this->find_last_of(__sv.data(), __pos, __sv.size());
2625 : }
2626 : #endif // C++17
2627 :
2628 : /**
2629 : * @brief Find last position of a character of C substring.
2630 : * @param __s C string containing characters to locate.
2631 : * @param __pos Index of character to search back from.
2632 : * @param __n Number of characters from s to search for.
2633 : * @return Index of last occurrence.
2634 : *
2635 : * Starting from @a __pos, searches backward for one of the
2636 : * first @a __n characters of @a __s within this string. If
2637 : * found, returns the index where it was found. If not found,
2638 : * returns npos.
2639 : */
2640 : size_type
2641 : find_last_of(const _CharT* __s, size_type __pos, size_type __n) const
2642 : _GLIBCXX_NOEXCEPT;
2643 :
2644 : /**
2645 : * @brief Find last position of a character of C string.
2646 : * @param __s C string containing characters to locate.
2647 : * @param __pos Index of character to search back from (default end).
2648 : * @return Index of last occurrence.
2649 : *
2650 : * Starting from @a __pos, searches backward for one of the
2651 : * characters of @a __s within this string. If found, returns
2652 : * the index where it was found. If not found, returns npos.
2653 : */
2654 : size_type
2655 : find_last_of(const _CharT* __s, size_type __pos = npos) const
2656 : _GLIBCXX_NOEXCEPT
2657 : {
2658 : __glibcxx_requires_string(__s);
2659 : return this->find_last_of(__s, __pos, traits_type::length(__s));
2660 : }
2661 :
2662 : /**
2663 : * @brief Find last position of a character.
2664 : * @param __c Character to locate.
2665 : * @param __pos Index of character to search back from (default end).
2666 : * @return Index of last occurrence.
2667 : *
2668 : * Starting from @a __pos, searches backward for @a __c within
2669 : * this string. If found, returns the index where it was
2670 : * found. If not found, returns npos.
2671 : *
2672 : * Note: equivalent to rfind(__c, __pos).
2673 : */
2674 : size_type
2675 : find_last_of(_CharT __c, size_type __pos = npos) const _GLIBCXX_NOEXCEPT
2676 : { return this->rfind(__c, __pos); }
2677 :
2678 : /**
2679 : * @brief Find position of a character not in string.
2680 : * @param __str String containing characters to avoid.
2681 : * @param __pos Index of character to search from (default 0).
2682 : * @return Index of first occurrence.
2683 : *
2684 : * Starting from @a __pos, searches forward for a character not contained
2685 : * in @a __str within this string. If found, returns the index where it
2686 : * was found. If not found, returns npos.
2687 : */
2688 : size_type
2689 : find_first_not_of(const basic_string& __str, size_type __pos = 0) const
2690 : _GLIBCXX_NOEXCEPT
2691 : { return this->find_first_not_of(__str.data(), __pos, __str.size()); }
2692 :
2693 : #if __cplusplus >= 201703L
2694 : /**
2695 : * @brief Find position of a character not in a string_view.
2696 : * @param __svt A object convertible to string_view containing
2697 : * characters to avoid.
2698 : * @param __pos Index of character to search from (default 0).
2699 : * @return Index of first occurrence.
2700 : */
2701 : template<typename _Tp>
2702 : _If_sv<_Tp, size_type>
2703 : find_first_not_of(const _Tp& __svt, size_type __pos = 0) const
2704 : noexcept(is_same<_Tp, __sv_type>::value)
2705 : {
2706 : __sv_type __sv = __svt;
2707 : return this->find_first_not_of(__sv.data(), __pos, __sv.size());
2708 : }
2709 : #endif // C++17
2710 :
2711 : /**
2712 : * @brief Find position of a character not in C substring.
2713 : * @param __s C string containing characters to avoid.
2714 : * @param __pos Index of character to search from.
2715 : * @param __n Number of characters from __s to consider.
2716 : * @return Index of first occurrence.
2717 : *
2718 : * Starting from @a __pos, searches forward for a character not
2719 : * contained in the first @a __n characters of @a __s within
2720 : * this string. If found, returns the index where it was
2721 : * found. If not found, returns npos.
2722 : */
2723 : size_type
2724 : find_first_not_of(const _CharT* __s, size_type __pos,
2725 : size_type __n) const _GLIBCXX_NOEXCEPT;
2726 :
2727 : /**
2728 : * @brief Find position of a character not in C string.
2729 : * @param __s C string containing characters to avoid.
2730 : * @param __pos Index of character to search from (default 0).
2731 : * @return Index of first occurrence.
2732 : *
2733 : * Starting from @a __pos, searches forward for a character not
2734 : * contained in @a __s within this string. If found, returns
2735 : * the index where it was found. If not found, returns npos.
2736 : */
2737 : size_type
2738 : find_first_not_of(const _CharT* __s, size_type __pos = 0) const
2739 : _GLIBCXX_NOEXCEPT
2740 : {
2741 : __glibcxx_requires_string(__s);
2742 : return this->find_first_not_of(__s, __pos, traits_type::length(__s));
2743 : }
2744 :
2745 : /**
2746 : * @brief Find position of a different character.
2747 : * @param __c Character to avoid.
2748 : * @param __pos Index of character to search from (default 0).
2749 : * @return Index of first occurrence.
2750 : *
2751 : * Starting from @a __pos, searches forward for a character
2752 : * other than @a __c within this string. If found, returns the
2753 : * index where it was found. If not found, returns npos.
2754 : */
2755 : size_type
2756 : find_first_not_of(_CharT __c, size_type __pos = 0) const
2757 : _GLIBCXX_NOEXCEPT;
2758 :
2759 : /**
2760 : * @brief Find last position of a character not in string.
2761 : * @param __str String containing characters to avoid.
2762 : * @param __pos Index of character to search back from (default end).
2763 : * @return Index of last occurrence.
2764 : *
2765 : * Starting from @a __pos, searches backward for a character
2766 : * not contained in @a __str within this string. If found,
2767 : * returns the index where it was found. If not found, returns
2768 : * npos.
2769 : */
2770 : size_type
2771 : find_last_not_of(const basic_string& __str, size_type __pos = npos) const
2772 : _GLIBCXX_NOEXCEPT
2773 : { return this->find_last_not_of(__str.data(), __pos, __str.size()); }
2774 :
2775 : #if __cplusplus >= 201703L
2776 : /**
2777 : * @brief Find last position of a character not in a string_view.
2778 : * @param __svt An object convertible to string_view containing
2779 : * characters to avoid.
2780 : * @param __pos Index of character to search back from (default end).
2781 : * @return Index of last occurrence.
2782 : */
2783 : template<typename _Tp>
2784 : _If_sv<_Tp, size_type>
2785 : find_last_not_of(const _Tp& __svt, size_type __pos = npos) const
2786 : noexcept(is_same<_Tp, __sv_type>::value)
2787 : {
2788 : __sv_type __sv = __svt;
2789 : return this->find_last_not_of(__sv.data(), __pos, __sv.size());
2790 : }
2791 : #endif // C++17
2792 :
2793 : /**
2794 : * @brief Find last position of a character not in C substring.
2795 : * @param __s C string containing characters to avoid.
2796 : * @param __pos Index of character to search back from.
2797 : * @param __n Number of characters from s to consider.
2798 : * @return Index of last occurrence.
2799 : *
2800 : * Starting from @a __pos, searches backward for a character not
2801 : * contained in the first @a __n characters of @a __s within this string.
2802 : * If found, returns the index where it was found. If not found,
2803 : * returns npos.
2804 : */
2805 : size_type
2806 : find_last_not_of(const _CharT* __s, size_type __pos,
2807 : size_type __n) const _GLIBCXX_NOEXCEPT;
2808 : /**
2809 : * @brief Find last position of a character not in C string.
2810 : * @param __s C string containing characters to avoid.
2811 : * @param __pos Index of character to search back from (default end).
2812 : * @return Index of last occurrence.
2813 : *
2814 : * Starting from @a __pos, searches backward for a character
2815 : * not contained in @a __s within this string. If found,
2816 : * returns the index where it was found. If not found, returns
2817 : * npos.
2818 : */
2819 : size_type
2820 : find_last_not_of(const _CharT* __s, size_type __pos = npos) const
2821 : _GLIBCXX_NOEXCEPT
2822 : {
2823 : __glibcxx_requires_string(__s);
2824 : return this->find_last_not_of(__s, __pos, traits_type::length(__s));
2825 : }
2826 :
2827 : /**
2828 : * @brief Find last position of a different character.
2829 : * @param __c Character to avoid.
2830 : * @param __pos Index of character to search back from (default end).
2831 : * @return Index of last occurrence.
2832 : *
2833 : * Starting from @a __pos, searches backward for a character other than
2834 : * @a __c within this string. If found, returns the index where it was
2835 : * found. If not found, returns npos.
2836 : */
2837 : size_type
2838 : find_last_not_of(_CharT __c, size_type __pos = npos) const
2839 : _GLIBCXX_NOEXCEPT;
2840 :
2841 : /**
2842 : * @brief Get a substring.
2843 : * @param __pos Index of first character (default 0).
2844 : * @param __n Number of characters in substring (default remainder).
2845 : * @return The new string.
2846 : * @throw std::out_of_range If __pos > size().
2847 : *
2848 : * Construct and return a new string using the @a __n
2849 : * characters starting at @a __pos. If the string is too
2850 : * short, use the remainder of the characters. If @a __pos is
2851 : * beyond the end of the string, out_of_range is thrown.
2852 : */
2853 : basic_string
2854 : substr(size_type __pos = 0, size_type __n = npos) const
2855 : { return basic_string(*this,
2856 : _M_check(__pos, "basic_string::substr"), __n); }
2857 :
2858 : /**
2859 : * @brief Compare to a string.
2860 : * @param __str String to compare against.
2861 : * @return Integer < 0, 0, or > 0.
2862 : *
2863 : * Returns an integer < 0 if this string is ordered before @a
2864 : * __str, 0 if their values are equivalent, or > 0 if this
2865 : * string is ordered after @a __str. Determines the effective
2866 : * length rlen of the strings to compare as the smallest of
2867 : * size() and str.size(). The function then compares the two
2868 : * strings by calling traits::compare(data(), str.data(),rlen).
2869 : * If the result of the comparison is nonzero returns it,
2870 : * otherwise the shorter one is ordered first.
2871 : */
2872 : int
2873 : compare(const basic_string& __str) const
2874 : {
2875 : const size_type __size = this->size();
2876 : const size_type __osize = __str.size();
2877 : const size_type __len = std::min(__size, __osize);
2878 :
2879 : int __r = traits_type::compare(_M_data(), __str.data(), __len);
2880 : if (!__r)
2881 : __r = _S_compare(__size, __osize);
2882 : return __r;
2883 : }
2884 :
2885 : #if __cplusplus >= 201703L
2886 : /**
2887 : * @brief Compare to a string_view.
2888 : * @param __svt An object convertible to string_view to compare against.
2889 : * @return Integer < 0, 0, or > 0.
2890 : */
2891 : template<typename _Tp>
2892 : _If_sv<_Tp, int>
2893 : compare(const _Tp& __svt) const
2894 : noexcept(is_same<_Tp, __sv_type>::value)
2895 : {
2896 : __sv_type __sv = __svt;
2897 : const size_type __size = this->size();
2898 : const size_type __osize = __sv.size();
2899 : const size_type __len = std::min(__size, __osize);
2900 :
2901 : int __r = traits_type::compare(_M_data(), __sv.data(), __len);
2902 : if (!__r)
2903 : __r = _S_compare(__size, __osize);
2904 : return __r;
2905 : }
2906 :
2907 : /**
2908 : * @brief Compare to a string_view.
2909 : * @param __pos A position in the string to start comparing from.
2910 : * @param __n The number of characters to compare.
2911 : * @param __svt An object convertible to string_view to compare
2912 : * against.
2913 : * @return Integer < 0, 0, or > 0.
2914 : */
2915 : template<typename _Tp>
2916 : _If_sv<_Tp, int>
2917 : compare(size_type __pos, size_type __n, const _Tp& __svt) const
2918 : noexcept(is_same<_Tp, __sv_type>::value)
2919 : {
2920 : __sv_type __sv = __svt;
2921 : return __sv_type(*this).substr(__pos, __n).compare(__sv);
2922 : }
2923 :
2924 : /**
2925 : * @brief Compare to a string_view.
2926 : * @param __pos1 A position in the string to start comparing from.
2927 : * @param __n1 The number of characters to compare.
2928 : * @param __svt An object convertible to string_view to compare
2929 : * against.
2930 : * @param __pos2 A position in the string_view to start comparing from.
2931 : * @param __n2 The number of characters to compare.
2932 : * @return Integer < 0, 0, or > 0.
2933 : */
2934 : template<typename _Tp>
2935 : _If_sv<_Tp, int>
2936 : compare(size_type __pos1, size_type __n1, const _Tp& __svt,
2937 : size_type __pos2, size_type __n2 = npos) const
2938 : noexcept(is_same<_Tp, __sv_type>::value)
2939 : {
2940 : __sv_type __sv = __svt;
2941 : return __sv_type(*this)
2942 : .substr(__pos1, __n1).compare(__sv.substr(__pos2, __n2));
2943 : }
2944 : #endif // C++17
2945 :
2946 : /**
2947 : * @brief Compare substring to a string.
2948 : * @param __pos Index of first character of substring.
2949 : * @param __n Number of characters in substring.
2950 : * @param __str String to compare against.
2951 : * @return Integer < 0, 0, or > 0.
2952 : *
2953 : * Form the substring of this string from the @a __n characters
2954 : * starting at @a __pos. Returns an integer < 0 if the
2955 : * substring is ordered before @a __str, 0 if their values are
2956 : * equivalent, or > 0 if the substring is ordered after @a
2957 : * __str. Determines the effective length rlen of the strings
2958 : * to compare as the smallest of the length of the substring
2959 : * and @a __str.size(). The function then compares the two
2960 : * strings by calling
2961 : * traits::compare(substring.data(),str.data(),rlen). If the
2962 : * result of the comparison is nonzero returns it, otherwise
2963 : * the shorter one is ordered first.
2964 : */
2965 : int
2966 : compare(size_type __pos, size_type __n, const basic_string& __str) const;
2967 :
2968 : /**
2969 : * @brief Compare substring to a substring.
2970 : * @param __pos1 Index of first character of substring.
2971 : * @param __n1 Number of characters in substring.
2972 : * @param __str String to compare against.
2973 : * @param __pos2 Index of first character of substring of str.
2974 : * @param __n2 Number of characters in substring of str.
2975 : * @return Integer < 0, 0, or > 0.
2976 : *
2977 : * Form the substring of this string from the @a __n1
2978 : * characters starting at @a __pos1. Form the substring of @a
2979 : * __str from the @a __n2 characters starting at @a __pos2.
2980 : * Returns an integer < 0 if this substring is ordered before
2981 : * the substring of @a __str, 0 if their values are equivalent,
2982 : * or > 0 if this substring is ordered after the substring of
2983 : * @a __str. Determines the effective length rlen of the
2984 : * strings to compare as the smallest of the lengths of the
2985 : * substrings. The function then compares the two strings by
2986 : * calling
2987 : * traits::compare(substring.data(),str.substr(pos2,n2).data(),rlen).
2988 : * If the result of the comparison is nonzero returns it,
2989 : * otherwise the shorter one is ordered first.
2990 : */
2991 : int
2992 : compare(size_type __pos1, size_type __n1, const basic_string& __str,
2993 : size_type __pos2, size_type __n2 = npos) const;
2994 :
2995 : /**
2996 : * @brief Compare to a C string.
2997 : * @param __s C string to compare against.
2998 : * @return Integer < 0, 0, or > 0.
2999 : *
3000 : * Returns an integer < 0 if this string is ordered before @a __s, 0 if
3001 : * their values are equivalent, or > 0 if this string is ordered after
3002 : * @a __s. Determines the effective length rlen of the strings to
3003 : * compare as the smallest of size() and the length of a string
3004 : * constructed from @a __s. The function then compares the two strings
3005 : * by calling traits::compare(data(),s,rlen). If the result of the
3006 : * comparison is nonzero returns it, otherwise the shorter one is
3007 : * ordered first.
3008 : */
3009 : int
3010 : compare(const _CharT* __s) const _GLIBCXX_NOEXCEPT;
3011 :
3012 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
3013 : // 5 String::compare specification questionable
3014 : /**
3015 : * @brief Compare substring to a C string.
3016 : * @param __pos Index of first character of substring.
3017 : * @param __n1 Number of characters in substring.
3018 : * @param __s C string to compare against.
3019 : * @return Integer < 0, 0, or > 0.
3020 : *
3021 : * Form the substring of this string from the @a __n1
3022 : * characters starting at @a pos. Returns an integer < 0 if
3023 : * the substring is ordered before @a __s, 0 if their values
3024 : * are equivalent, or > 0 if the substring is ordered after @a
3025 : * __s. Determines the effective length rlen of the strings to
3026 : * compare as the smallest of the length of the substring and
3027 : * the length of a string constructed from @a __s. The
3028 : * function then compares the two string by calling
3029 : * traits::compare(substring.data(),__s,rlen). If the result of
3030 : * the comparison is nonzero returns it, otherwise the shorter
3031 : * one is ordered first.
3032 : */
3033 : int
3034 : compare(size_type __pos, size_type __n1, const _CharT* __s) const;
3035 :
3036 : /**
3037 : * @brief Compare substring against a character %array.
3038 : * @param __pos Index of first character of substring.
3039 : * @param __n1 Number of characters in substring.
3040 : * @param __s character %array to compare against.
3041 : * @param __n2 Number of characters of s.
3042 : * @return Integer < 0, 0, or > 0.
3043 : *
3044 : * Form the substring of this string from the @a __n1
3045 : * characters starting at @a __pos. Form a string from the
3046 : * first @a __n2 characters of @a __s. Returns an integer < 0
3047 : * if this substring is ordered before the string from @a __s,
3048 : * 0 if their values are equivalent, or > 0 if this substring
3049 : * is ordered after the string from @a __s. Determines the
3050 : * effective length rlen of the strings to compare as the
3051 : * smallest of the length of the substring and @a __n2. The
3052 : * function then compares the two strings by calling
3053 : * traits::compare(substring.data(),s,rlen). If the result of
3054 : * the comparison is nonzero returns it, otherwise the shorter
3055 : * one is ordered first.
3056 : *
3057 : * NB: s must have at least n2 characters, '\\0' has
3058 : * no special meaning.
3059 : */
3060 : int
3061 : compare(size_type __pos, size_type __n1, const _CharT* __s,
3062 : size_type __n2) const;
3063 :
3064 : #if __cplusplus > 201703L
3065 : bool
3066 : starts_with(basic_string_view<_CharT, _Traits> __x) const noexcept
3067 : { return __sv_type(this->data(), this->size()).starts_with(__x); }
3068 :
3069 : bool
3070 : starts_with(_CharT __x) const noexcept
3071 : { return __sv_type(this->data(), this->size()).starts_with(__x); }
3072 :
3073 : bool
3074 : starts_with(const _CharT* __x) const noexcept
3075 : { return __sv_type(this->data(), this->size()).starts_with(__x); }
3076 :
3077 : bool
3078 : ends_with(basic_string_view<_CharT, _Traits> __x) const noexcept
3079 : { return __sv_type(this->data(), this->size()).ends_with(__x); }
3080 :
3081 : bool
3082 : ends_with(_CharT __x) const noexcept
3083 : { return __sv_type(this->data(), this->size()).ends_with(__x); }
3084 :
3085 : bool
3086 : ends_with(const _CharT* __x) const noexcept
3087 : { return __sv_type(this->data(), this->size()).ends_with(__x); }
3088 : #endif // C++20
3089 :
3090 : #if __cplusplus > 202002L
3091 : bool
3092 : contains(basic_string_view<_CharT, _Traits> __x) const noexcept
3093 : { return __sv_type(this->data(), this->size()).contains(__x); }
3094 :
3095 : bool
3096 : contains(_CharT __x) const noexcept
3097 : { return __sv_type(this->data(), this->size()).contains(__x); }
3098 :
3099 : bool
3100 : contains(const _CharT* __x) const noexcept
3101 : { return __sv_type(this->data(), this->size()).contains(__x); }
3102 : #endif // C++23
3103 :
3104 : // Allow basic_stringbuf::__xfer_bufptrs to call _M_length:
3105 : template<typename, typename, typename> friend class basic_stringbuf;
3106 : };
3107 : _GLIBCXX_END_NAMESPACE_CXX11
3108 : #else // !_GLIBCXX_USE_CXX11_ABI
3109 : // Reference-counted COW string implentation
3110 :
3111 : /**
3112 : * @class basic_string basic_string.h <string>
3113 : * @brief Managing sequences of characters and character-like objects.
3114 : *
3115 : * @ingroup strings
3116 : * @ingroup sequences
3117 : *
3118 : * @tparam _CharT Type of character
3119 : * @tparam _Traits Traits for character type, defaults to
3120 : * char_traits<_CharT>.
3121 : * @tparam _Alloc Allocator type, defaults to allocator<_CharT>.
3122 : *
3123 : * Meets the requirements of a <a href="tables.html#65">container</a>, a
3124 : * <a href="tables.html#66">reversible container</a>, and a
3125 : * <a href="tables.html#67">sequence</a>. Of the
3126 : * <a href="tables.html#68">optional sequence requirements</a>, only
3127 : * @c push_back, @c at, and @c %array access are supported.
3128 : *
3129 : * @doctodo
3130 : *
3131 : *
3132 : * Documentation? What's that?
3133 : * Nathan Myers <ncm@cantrip.org>.
3134 : *
3135 : * A string looks like this:
3136 : *
3137 : * @code
3138 : * [_Rep]
3139 : * _M_length
3140 : * [basic_string<char_type>] _M_capacity
3141 : * _M_dataplus _M_refcount
3142 : * _M_p ----------------> unnamed array of char_type
3143 : * @endcode
3144 : *
3145 : * Where the _M_p points to the first character in the string, and
3146 : * you cast it to a pointer-to-_Rep and subtract 1 to get a
3147 : * pointer to the header.
3148 : *
3149 : * This approach has the enormous advantage that a string object
3150 : * requires only one allocation. All the ugliness is confined
3151 : * within a single %pair of inline functions, which each compile to
3152 : * a single @a add instruction: _Rep::_M_data(), and
3153 : * string::_M_rep(); and the allocation function which gets a
3154 : * block of raw bytes and with room enough and constructs a _Rep
3155 : * object at the front.
3156 : *
3157 : * The reason you want _M_data pointing to the character %array and
3158 : * not the _Rep is so that the debugger can see the string
3159 : * contents. (Probably we should add a non-inline member to get
3160 : * the _Rep for the debugger to use, so users can check the actual
3161 : * string length.)
3162 : *
3163 : * Note that the _Rep object is a POD so that you can have a
3164 : * static <em>empty string</em> _Rep object already @a constructed before
3165 : * static constructors have run. The reference-count encoding is
3166 : * chosen so that a 0 indicates one reference, so you never try to
3167 : * destroy the empty-string _Rep object.
3168 : *
3169 : * All but the last paragraph is considered pretty conventional
3170 : * for a C++ string implementation.
3171 : */
3172 : // 21.3 Template class basic_string
3173 : template<typename _CharT, typename _Traits, typename _Alloc>
3174 : class basic_string
3175 : {
3176 : typedef typename __gnu_cxx::__alloc_traits<_Alloc>::template
3177 : rebind<_CharT>::other _CharT_alloc_type;
3178 : typedef __gnu_cxx::__alloc_traits<_CharT_alloc_type> _CharT_alloc_traits;
3179 :
3180 : // Types:
3181 : public:
3182 : typedef _Traits traits_type;
3183 : typedef typename _Traits::char_type value_type;
3184 : typedef _Alloc allocator_type;
3185 : typedef typename _CharT_alloc_traits::size_type size_type;
3186 : typedef typename _CharT_alloc_traits::difference_type difference_type;
3187 : #if __cplusplus < 201103L
3188 : typedef typename _CharT_alloc_type::reference reference;
3189 : typedef typename _CharT_alloc_type::const_reference const_reference;
3190 : #else
3191 : typedef value_type& reference;
3192 : typedef const value_type& const_reference;
3193 : #endif
3194 : typedef typename _CharT_alloc_traits::pointer pointer;
3195 : typedef typename _CharT_alloc_traits::const_pointer const_pointer;
3196 : typedef __gnu_cxx::__normal_iterator<pointer, basic_string> iterator;
3197 : typedef __gnu_cxx::__normal_iterator<const_pointer, basic_string>
3198 : const_iterator;
3199 : typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
3200 : typedef std::reverse_iterator<iterator> reverse_iterator;
3201 :
3202 : protected:
3203 : // type used for positions in insert, erase etc.
3204 : typedef iterator __const_iterator;
3205 :
3206 : private:
3207 : // _Rep: string representation
3208 : // Invariants:
3209 : // 1. String really contains _M_length + 1 characters: due to 21.3.4
3210 : // must be kept null-terminated.
3211 : // 2. _M_capacity >= _M_length
3212 : // Allocated memory is always (_M_capacity + 1) * sizeof(_CharT).
3213 : // 3. _M_refcount has three states:
3214 : // -1: leaked, one reference, no ref-copies allowed, non-const.
3215 : // 0: one reference, non-const.
3216 : // n>0: n + 1 references, operations require a lock, const.
3217 : // 4. All fields==0 is an empty string, given the extra storage
3218 : // beyond-the-end for a null terminator; thus, the shared
3219 : // empty string representation needs no constructor.
3220 :
3221 : struct _Rep_base
3222 : {
3223 : size_type _M_length;
3224 : size_type _M_capacity;
3225 : _Atomic_word _M_refcount;
3226 : };
3227 :
3228 : struct _Rep : _Rep_base
3229 : {
3230 : // Types:
3231 : typedef typename __gnu_cxx::__alloc_traits<_Alloc>::template
3232 : rebind<char>::other _Raw_bytes_alloc;
3233 :
3234 : // (Public) Data members:
3235 :
3236 : // The maximum number of individual char_type elements of an
3237 : // individual string is determined by _S_max_size. This is the
3238 : // value that will be returned by max_size(). (Whereas npos
3239 : // is the maximum number of bytes the allocator can allocate.)
3240 : // If one was to divvy up the theoretical largest size string,
3241 : // with a terminating character and m _CharT elements, it'd
3242 : // look like this:
3243 : // npos = sizeof(_Rep) + (m * sizeof(_CharT)) + sizeof(_CharT)
3244 : // Solving for m:
3245 : // m = ((npos - sizeof(_Rep))/sizeof(CharT)) - 1
3246 : // In addition, this implementation quarters this amount.
3247 : static const size_type _S_max_size;
3248 : static const _CharT _S_terminal;
3249 :
3250 : // The following storage is init'd to 0 by the linker, resulting
3251 : // (carefully) in an empty string with one reference.
3252 : static size_type _S_empty_rep_storage[];
3253 :
3254 : static _Rep&
3255 : _S_empty_rep() _GLIBCXX_NOEXCEPT
3256 : {
3257 : // NB: Mild hack to avoid strict-aliasing warnings. Note that
3258 : // _S_empty_rep_storage is never modified and the punning should
3259 : // be reasonably safe in this case.
3260 : void* __p = reinterpret_cast<void*>(&_S_empty_rep_storage);
3261 : return *reinterpret_cast<_Rep*>(__p);
3262 : }
3263 :
3264 : bool
3265 : _M_is_leaked() const _GLIBCXX_NOEXCEPT
3266 : {
3267 : #if defined(__GTHREADS)
3268 : // _M_refcount is mutated concurrently by _M_refcopy/_M_dispose,
3269 : // so we need to use an atomic load. However, _M_is_leaked
3270 : // predicate does not change concurrently (i.e. the string is either
3271 : // leaked or not), so a relaxed load is enough.
3272 : return __atomic_load_n(&this->_M_refcount, __ATOMIC_RELAXED) < 0;
3273 : #else
3274 : return this->_M_refcount < 0;
3275 : #endif
3276 : }
3277 :
3278 : bool
3279 : _M_is_shared() const _GLIBCXX_NOEXCEPT
3280 : {
3281 : #if defined(__GTHREADS)
3282 : // _M_refcount is mutated concurrently by _M_refcopy/_M_dispose,
3283 : // so we need to use an atomic load. Another thread can drop last
3284 : // but one reference concurrently with this check, so we need this
3285 : // load to be acquire to synchronize with release fetch_and_add in
3286 : // _M_dispose.
3287 : return __atomic_load_n(&this->_M_refcount, __ATOMIC_ACQUIRE) > 0;
3288 : #else
3289 : return this->_M_refcount > 0;
3290 : #endif
3291 : }
3292 :
3293 : void
3294 : _M_set_leaked() _GLIBCXX_NOEXCEPT
3295 : { this->_M_refcount = -1; }
3296 :
3297 : void
3298 : _M_set_sharable() _GLIBCXX_NOEXCEPT
3299 : { this->_M_refcount = 0; }
3300 :
3301 : void
3302 : _M_set_length_and_sharable(size_type __n) _GLIBCXX_NOEXCEPT
3303 : {
3304 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
3305 : if (__builtin_expect(this != &_S_empty_rep(), false))
3306 : #endif
3307 : {
3308 : this->_M_set_sharable(); // One reference.
3309 : this->_M_length = __n;
3310 : traits_type::assign(this->_M_refdata()[__n], _S_terminal);
3311 : // grrr. (per 21.3.4)
3312 : // You cannot leave those LWG people alone for a second.
3313 : }
3314 : }
3315 :
3316 : _CharT*
3317 : _M_refdata() throw()
3318 : { return reinterpret_cast<_CharT*>(this + 1); }
3319 :
3320 : _CharT*
3321 : _M_grab(const _Alloc& __alloc1, const _Alloc& __alloc2)
3322 : {
3323 : return (!_M_is_leaked() && __alloc1 == __alloc2)
3324 : ? _M_refcopy() : _M_clone(__alloc1);
3325 : }
3326 :
3327 : // Create & Destroy
3328 : static _Rep*
3329 : _S_create(size_type, size_type, const _Alloc&);
3330 :
3331 : void
3332 : _M_dispose(const _Alloc& __a) _GLIBCXX_NOEXCEPT
3333 : {
3334 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
3335 : if (__builtin_expect(this != &_S_empty_rep(), false))
3336 : #endif
3337 : {
3338 : // Be race-detector-friendly. For more info see bits/c++config.
3339 : _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&this->_M_refcount);
3340 : // Decrement of _M_refcount is acq_rel, because:
3341 : // - all but last decrements need to release to synchronize with
3342 : // the last decrement that will delete the object.
3343 : // - the last decrement needs to acquire to synchronize with
3344 : // all the previous decrements.
3345 : // - last but one decrement needs to release to synchronize with
3346 : // the acquire load in _M_is_shared that will conclude that
3347 : // the object is not shared anymore.
3348 : if (__gnu_cxx::__exchange_and_add_dispatch(&this->_M_refcount,
3349 : -1) <= 0)
3350 : {
3351 : _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&this->_M_refcount);
3352 : _M_destroy(__a);
3353 : }
3354 : }
3355 : } // XXX MT
3356 :
3357 : void
3358 : _M_destroy(const _Alloc&) throw();
3359 :
3360 : _CharT*
3361 : _M_refcopy() throw()
3362 : {
3363 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
3364 : if (__builtin_expect(this != &_S_empty_rep(), false))
3365 : #endif
3366 : __gnu_cxx::__atomic_add_dispatch(&this->_M_refcount, 1);
3367 : return _M_refdata();
3368 : } // XXX MT
3369 :
3370 : _CharT*
3371 : _M_clone(const _Alloc&, size_type __res = 0);
3372 : };
3373 :
3374 : // Use empty-base optimization: http://www.cantrip.org/emptyopt.html
3375 : struct _Alloc_hider : _Alloc
3376 : {
3377 : _Alloc_hider(_CharT* __dat, const _Alloc& __a) _GLIBCXX_NOEXCEPT
3378 : : _Alloc(__a), _M_p(__dat) { }
3379 :
3380 : _CharT* _M_p; // The actual data.
3381 : };
3382 :
3383 : public:
3384 : // Data Members (public):
3385 : // NB: This is an unsigned type, and thus represents the maximum
3386 : // size that the allocator can hold.
3387 : /// Value returned by various member functions when they fail.
3388 : static const size_type npos = static_cast<size_type>(-1);
3389 :
3390 : private:
3391 : // Data Members (private):
3392 : mutable _Alloc_hider _M_dataplus;
3393 :
3394 : _CharT*
3395 : _M_data() const _GLIBCXX_NOEXCEPT
3396 : { return _M_dataplus._M_p; }
3397 :
3398 : _CharT*
3399 : _M_data(_CharT* __p) _GLIBCXX_NOEXCEPT
3400 : { return (_M_dataplus._M_p = __p); }
3401 :
3402 : _Rep*
3403 : _M_rep() const _GLIBCXX_NOEXCEPT
3404 : { return &((reinterpret_cast<_Rep*> (_M_data()))[-1]); }
3405 :
3406 : // For the internal use we have functions similar to `begin'/`end'
3407 : // but they do not call _M_leak.
3408 : iterator
3409 : _M_ibegin() const _GLIBCXX_NOEXCEPT
3410 : { return iterator(_M_data()); }
3411 :
3412 : iterator
3413 : _M_iend() const _GLIBCXX_NOEXCEPT
3414 : { return iterator(_M_data() + this->size()); }
3415 :
3416 : void
3417 : _M_leak() // for use in begin() & non-const op[]
3418 : {
3419 : if (!_M_rep()->_M_is_leaked())
3420 : _M_leak_hard();
3421 : }
3422 :
3423 : size_type
3424 : _M_check(size_type __pos, const char* __s) const
3425 : {
3426 : if (__pos > this->size())
3427 : __throw_out_of_range_fmt(__N("%s: __pos (which is %zu) > "
3428 : "this->size() (which is %zu)"),
3429 : __s, __pos, this->size());
3430 : return __pos;
3431 : }
3432 :
3433 : void
3434 : _M_check_length(size_type __n1, size_type __n2, const char* __s) const
3435 : {
3436 : if (this->max_size() - (this->size() - __n1) < __n2)
3437 : __throw_length_error(__N(__s));
3438 : }
3439 :
3440 : // NB: _M_limit doesn't check for a bad __pos value.
3441 : size_type
3442 : _M_limit(size_type __pos, size_type __off) const _GLIBCXX_NOEXCEPT
3443 : {
3444 : const bool __testoff = __off < this->size() - __pos;
3445 : return __testoff ? __off : this->size() - __pos;
3446 : }
3447 :
3448 : // True if _Rep and source do not overlap.
3449 : bool
3450 : _M_disjunct(const _CharT* __s) const _GLIBCXX_NOEXCEPT
3451 : {
3452 : return (less<const _CharT*>()(__s, _M_data())
3453 : || less<const _CharT*>()(_M_data() + this->size(), __s));
3454 : }
3455 :
3456 : // When __n = 1 way faster than the general multichar
3457 : // traits_type::copy/move/assign.
3458 : static void
3459 : _M_copy(_CharT* __d, const _CharT* __s, size_type __n) _GLIBCXX_NOEXCEPT
3460 : {
3461 : if (__n == 1)
3462 : traits_type::assign(*__d, *__s);
3463 : else
3464 : traits_type::copy(__d, __s, __n);
3465 : }
3466 :
3467 : static void
3468 : _M_move(_CharT* __d, const _CharT* __s, size_type __n) _GLIBCXX_NOEXCEPT
3469 : {
3470 : if (__n == 1)
3471 : traits_type::assign(*__d, *__s);
3472 : else
3473 : traits_type::move(__d, __s, __n);
3474 : }
3475 :
3476 : static void
3477 : _M_assign(_CharT* __d, size_type __n, _CharT __c) _GLIBCXX_NOEXCEPT
3478 : {
3479 : if (__n == 1)
3480 : traits_type::assign(*__d, __c);
3481 : else
3482 : traits_type::assign(__d, __n, __c);
3483 : }
3484 :
3485 : // _S_copy_chars is a separate template to permit specialization
3486 : // to optimize for the common case of pointers as iterators.
3487 : template<class _Iterator>
3488 : static void
3489 : _S_copy_chars(_CharT* __p, _Iterator __k1, _Iterator __k2)
3490 : {
3491 : for (; __k1 != __k2; ++__k1, (void)++__p)
3492 : traits_type::assign(*__p, *__k1); // These types are off.
3493 : }
3494 :
3495 : static void
3496 : _S_copy_chars(_CharT* __p, iterator __k1, iterator __k2) _GLIBCXX_NOEXCEPT
3497 : { _S_copy_chars(__p, __k1.base(), __k2.base()); }
3498 :
3499 : static void
3500 : _S_copy_chars(_CharT* __p, const_iterator __k1, const_iterator __k2)
3501 : _GLIBCXX_NOEXCEPT
3502 : { _S_copy_chars(__p, __k1.base(), __k2.base()); }
3503 :
3504 : static void
3505 : _S_copy_chars(_CharT* __p, _CharT* __k1, _CharT* __k2) _GLIBCXX_NOEXCEPT
3506 : { _M_copy(__p, __k1, __k2 - __k1); }
3507 :
3508 : static void
3509 : _S_copy_chars(_CharT* __p, const _CharT* __k1, const _CharT* __k2)
3510 : _GLIBCXX_NOEXCEPT
3511 : { _M_copy(__p, __k1, __k2 - __k1); }
3512 :
3513 : static int
3514 : _S_compare(size_type __n1, size_type __n2) _GLIBCXX_NOEXCEPT
3515 : {
3516 : const difference_type __d = difference_type(__n1 - __n2);
3517 :
3518 : if (__d > __gnu_cxx::__numeric_traits<int>::__max)
3519 : return __gnu_cxx::__numeric_traits<int>::__max;
3520 : else if (__d < __gnu_cxx::__numeric_traits<int>::__min)
3521 : return __gnu_cxx::__numeric_traits<int>::__min;
3522 : else
3523 : return int(__d);
3524 : }
3525 :
3526 : void
3527 : _M_mutate(size_type __pos, size_type __len1, size_type __len2);
3528 :
3529 : void
3530 : _M_leak_hard();
3531 :
3532 : static _Rep&
3533 : _S_empty_rep() _GLIBCXX_NOEXCEPT
3534 : { return _Rep::_S_empty_rep(); }
3535 :
3536 : #if __cplusplus >= 201703L
3537 : // A helper type for avoiding boiler-plate.
3538 : typedef basic_string_view<_CharT, _Traits> __sv_type;
3539 :
3540 : template<typename _Tp, typename _Res>
3541 : using _If_sv = enable_if_t<
3542 : __and_<is_convertible<const _Tp&, __sv_type>,
3543 : __not_<is_convertible<const _Tp*, const basic_string*>>,
3544 : __not_<is_convertible<const _Tp&, const _CharT*>>>::value,
3545 : _Res>;
3546 :
3547 : // Allows an implicit conversion to __sv_type.
3548 : static __sv_type
3549 : _S_to_string_view(__sv_type __svt) noexcept
3550 : { return __svt; }
3551 :
3552 : // Wraps a string_view by explicit conversion and thus
3553 : // allows to add an internal constructor that does not
3554 : // participate in overload resolution when a string_view
3555 : // is provided.
3556 : struct __sv_wrapper
3557 : {
3558 : explicit __sv_wrapper(__sv_type __sv) noexcept : _M_sv(__sv) { }
3559 : __sv_type _M_sv;
3560 : };
3561 :
3562 : /**
3563 : * @brief Only internally used: Construct string from a string view
3564 : * wrapper.
3565 : * @param __svw string view wrapper.
3566 : * @param __a Allocator to use.
3567 : */
3568 : explicit
3569 : basic_string(__sv_wrapper __svw, const _Alloc& __a)
3570 : : basic_string(__svw._M_sv.data(), __svw._M_sv.size(), __a) { }
3571 : #endif
3572 :
3573 : public:
3574 : // Construct/copy/destroy:
3575 : // NB: We overload ctors in some cases instead of using default
3576 : // arguments, per 17.4.4.4 para. 2 item 2.
3577 :
3578 : /**
3579 : * @brief Default constructor creates an empty string.
3580 : */
3581 : basic_string()
3582 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
3583 : _GLIBCXX_NOEXCEPT
3584 : : _M_dataplus(_S_empty_rep()._M_refdata(), _Alloc())
3585 : #else
3586 : : _M_dataplus(_S_construct(size_type(), _CharT(), _Alloc()), _Alloc())
3587 : #endif
3588 : { }
3589 :
3590 : /**
3591 : * @brief Construct an empty string using allocator @a a.
3592 : */
3593 : explicit
3594 : basic_string(const _Alloc& __a)
3595 : : _M_dataplus(_S_construct(size_type(), _CharT(), __a), __a)
3596 : { }
3597 :
3598 : // NB: per LWG issue 42, semantics different from IS:
3599 : /**
3600 : * @brief Construct string with copy of value of @a str.
3601 : * @param __str Source string.
3602 : */
3603 : basic_string(const basic_string& __str)
3604 : : _M_dataplus(__str._M_rep()->_M_grab(_Alloc(__str.get_allocator()),
3605 : __str.get_allocator()),
3606 : __str.get_allocator())
3607 : { }
3608 :
3609 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
3610 : // 2583. no way to supply an allocator for basic_string(str, pos)
3611 : /**
3612 : * @brief Construct string as copy of a substring.
3613 : * @param __str Source string.
3614 : * @param __pos Index of first character to copy from.
3615 : * @param __a Allocator to use.
3616 : */
3617 : basic_string(const basic_string& __str, size_type __pos,
3618 : const _Alloc& __a = _Alloc());
3619 :
3620 : /**
3621 : * @brief Construct string as copy of a substring.
3622 : * @param __str Source string.
3623 : * @param __pos Index of first character to copy from.
3624 : * @param __n Number of characters to copy.
3625 : */
3626 : basic_string(const basic_string& __str, size_type __pos,
3627 : size_type __n);
3628 : /**
3629 : * @brief Construct string as copy of a substring.
3630 : * @param __str Source string.
3631 : * @param __pos Index of first character to copy from.
3632 : * @param __n Number of characters to copy.
3633 : * @param __a Allocator to use.
3634 : */
3635 : basic_string(const basic_string& __str, size_type __pos,
3636 : size_type __n, const _Alloc& __a);
3637 :
3638 : /**
3639 : * @brief Construct string initialized by a character %array.
3640 : * @param __s Source character %array.
3641 : * @param __n Number of characters to copy.
3642 : * @param __a Allocator to use (default is default allocator).
3643 : *
3644 : * NB: @a __s must have at least @a __n characters, '\\0'
3645 : * has no special meaning.
3646 : */
3647 : basic_string(const _CharT* __s, size_type __n,
3648 : const _Alloc& __a = _Alloc())
3649 : : _M_dataplus(_S_construct(__s, __s + __n, __a), __a)
3650 : { }
3651 :
3652 : /**
3653 : * @brief Construct string as copy of a C string.
3654 : * @param __s Source C string.
3655 : * @param __a Allocator to use (default is default allocator).
3656 : */
3657 : #if __cpp_deduction_guides && ! defined _GLIBCXX_DEFINING_STRING_INSTANTIATIONS
3658 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
3659 : // 3076. basic_string CTAD ambiguity
3660 : template<typename = _RequireAllocator<_Alloc>>
3661 : #endif
3662 : basic_string(const _CharT* __s, const _Alloc& __a = _Alloc())
3663 : : _M_dataplus(_S_construct(__s, __s ? __s + traits_type::length(__s) :
3664 : __s + npos, __a), __a)
3665 : { }
3666 :
3667 : /**
3668 : * @brief Construct string as multiple characters.
3669 : * @param __n Number of characters.
3670 : * @param __c Character to use.
3671 : * @param __a Allocator to use (default is default allocator).
3672 : */
3673 : basic_string(size_type __n, _CharT __c, const _Alloc& __a = _Alloc())
3674 : : _M_dataplus(_S_construct(__n, __c, __a), __a)
3675 : { }
3676 :
3677 : #if __cplusplus >= 201103L
3678 : /**
3679 : * @brief Move construct string.
3680 : * @param __str Source string.
3681 : *
3682 : * The newly-created string contains the exact contents of @a __str.
3683 : * @a __str is a valid, but unspecified string.
3684 : */
3685 : basic_string(basic_string&& __str)
3686 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
3687 : noexcept // FIXME C++11: should always be noexcept.
3688 : #endif
3689 : : _M_dataplus(std::move(__str._M_dataplus))
3690 : {
3691 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
3692 : __str._M_data(_S_empty_rep()._M_refdata());
3693 : #else
3694 : __str._M_data(_S_construct(size_type(), _CharT(), get_allocator()));
3695 : #endif
3696 : }
3697 :
3698 : /**
3699 : * @brief Construct string from an initializer %list.
3700 : * @param __l std::initializer_list of characters.
3701 : * @param __a Allocator to use (default is default allocator).
3702 : */
3703 : basic_string(initializer_list<_CharT> __l, const _Alloc& __a = _Alloc())
3704 : : _M_dataplus(_S_construct(__l.begin(), __l.end(), __a), __a)
3705 : { }
3706 :
3707 : basic_string(const basic_string& __str, const _Alloc& __a)
3708 : : _M_dataplus(__str._M_rep()->_M_grab(__a, __str.get_allocator()), __a)
3709 : { }
3710 :
3711 : basic_string(basic_string&& __str, const _Alloc& __a)
3712 : : _M_dataplus(__str._M_data(), __a)
3713 : {
3714 : if (__a == __str.get_allocator())
3715 : {
3716 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
3717 : __str._M_data(_S_empty_rep()._M_refdata());
3718 : #else
3719 : __str._M_data(_S_construct(size_type(), _CharT(), __a));
3720 : #endif
3721 : }
3722 : else
3723 : _M_dataplus._M_p = _S_construct(__str.begin(), __str.end(), __a);
3724 : }
3725 : #endif // C++11
3726 :
3727 : /**
3728 : * @brief Construct string as copy of a range.
3729 : * @param __beg Start of range.
3730 : * @param __end End of range.
3731 : * @param __a Allocator to use (default is default allocator).
3732 : */
3733 : template<class _InputIterator>
3734 : basic_string(_InputIterator __beg, _InputIterator __end,
3735 : const _Alloc& __a = _Alloc())
3736 : : _M_dataplus(_S_construct(__beg, __end, __a), __a)
3737 : { }
3738 :
3739 : #if __cplusplus >= 201703L
3740 : /**
3741 : * @brief Construct string from a substring of a string_view.
3742 : * @param __t Source object convertible to string view.
3743 : * @param __pos The index of the first character to copy from __t.
3744 : * @param __n The number of characters to copy from __t.
3745 : * @param __a Allocator to use.
3746 : */
3747 : template<typename _Tp,
3748 : typename = enable_if_t<is_convertible_v<const _Tp&, __sv_type>>>
3749 : basic_string(const _Tp& __t, size_type __pos, size_type __n,
3750 : const _Alloc& __a = _Alloc())
3751 : : basic_string(_S_to_string_view(__t).substr(__pos, __n), __a) { }
3752 :
3753 : /**
3754 : * @brief Construct string from a string_view.
3755 : * @param __t Source object convertible to string view.
3756 : * @param __a Allocator to use (default is default allocator).
3757 : */
3758 : template<typename _Tp, typename = _If_sv<_Tp, void>>
3759 : explicit
3760 : basic_string(const _Tp& __t, const _Alloc& __a = _Alloc())
3761 : : basic_string(__sv_wrapper(_S_to_string_view(__t)), __a) { }
3762 : #endif // C++17
3763 :
3764 : /**
3765 : * @brief Destroy the string instance.
3766 : */
3767 : ~basic_string() _GLIBCXX_NOEXCEPT
3768 : { _M_rep()->_M_dispose(this->get_allocator()); }
3769 :
3770 : /**
3771 : * @brief Assign the value of @a str to this string.
3772 : * @param __str Source string.
3773 : */
3774 : basic_string&
3775 : operator=(const basic_string& __str)
3776 : { return this->assign(__str); }
3777 :
3778 : /**
3779 : * @brief Copy contents of @a s into this string.
3780 : * @param __s Source null-terminated string.
3781 : */
3782 : basic_string&
3783 : operator=(const _CharT* __s)
3784 : { return this->assign(__s); }
3785 :
3786 : /**
3787 : * @brief Set value to string of length 1.
3788 : * @param __c Source character.
3789 : *
3790 : * Assigning to a character makes this string length 1 and
3791 : * (*this)[0] == @a c.
3792 : */
3793 : basic_string&
3794 : operator=(_CharT __c)
3795 : {
3796 : this->assign(1, __c);
3797 : return *this;
3798 : }
3799 :
3800 : #if __cplusplus >= 201103L
3801 : /**
3802 : * @brief Move assign the value of @a str to this string.
3803 : * @param __str Source string.
3804 : *
3805 : * The contents of @a str are moved into this string (without copying).
3806 : * @a str is a valid, but unspecified string.
3807 : */
3808 : basic_string&
3809 : operator=(basic_string&& __str)
3810 : _GLIBCXX_NOEXCEPT_IF(allocator_traits<_Alloc>::is_always_equal::value)
3811 : {
3812 : // NB: DR 1204.
3813 : this->swap(__str);
3814 : return *this;
3815 : }
3816 :
3817 : /**
3818 : * @brief Set value to string constructed from initializer %list.
3819 : * @param __l std::initializer_list.
3820 : */
3821 : basic_string&
3822 : operator=(initializer_list<_CharT> __l)
3823 : {
3824 : this->assign(__l.begin(), __l.size());
3825 : return *this;
3826 : }
3827 : #endif // C++11
3828 :
3829 : #if __cplusplus >= 201703L
3830 : /**
3831 : * @brief Set value to string constructed from a string_view.
3832 : * @param __svt An object convertible to string_view.
3833 : */
3834 : template<typename _Tp>
3835 : _If_sv<_Tp, basic_string&>
3836 : operator=(const _Tp& __svt)
3837 : { return this->assign(__svt); }
3838 :
3839 : /**
3840 : * @brief Convert to a string_view.
3841 : * @return A string_view.
3842 : */
3843 : operator __sv_type() const noexcept
3844 : { return __sv_type(data(), size()); }
3845 : #endif // C++17
3846 :
3847 : // Iterators:
3848 : /**
3849 : * Returns a read/write iterator that points to the first character in
3850 : * the %string. Unshares the string.
3851 : */
3852 : iterator
3853 : begin() // FIXME C++11: should be noexcept.
3854 : {
3855 : _M_leak();
3856 : return iterator(_M_data());
3857 : }
3858 :
3859 : /**
3860 : * Returns a read-only (constant) iterator that points to the first
3861 : * character in the %string.
3862 : */
3863 : const_iterator
3864 : begin() const _GLIBCXX_NOEXCEPT
3865 : { return const_iterator(_M_data()); }
3866 :
3867 : /**
3868 : * Returns a read/write iterator that points one past the last
3869 : * character in the %string. Unshares the string.
3870 : */
3871 : iterator
3872 : end() // FIXME C++11: should be noexcept.
3873 : {
3874 : _M_leak();
3875 : return iterator(_M_data() + this->size());
3876 : }
3877 :
3878 : /**
3879 : * Returns a read-only (constant) iterator that points one past the
3880 : * last character in the %string.
3881 : */
3882 : const_iterator
3883 : end() const _GLIBCXX_NOEXCEPT
3884 : { return const_iterator(_M_data() + this->size()); }
3885 :
3886 : /**
3887 : * Returns a read/write reverse iterator that points to the last
3888 : * character in the %string. Iteration is done in reverse element
3889 : * order. Unshares the string.
3890 : */
3891 : reverse_iterator
3892 : rbegin() // FIXME C++11: should be noexcept.
3893 : { return reverse_iterator(this->end()); }
3894 :
3895 : /**
3896 : * Returns a read-only (constant) reverse iterator that points
3897 : * to the last character in the %string. Iteration is done in
3898 : * reverse element order.
3899 : */
3900 : const_reverse_iterator
3901 : rbegin() const _GLIBCXX_NOEXCEPT
3902 : { return const_reverse_iterator(this->end()); }
3903 :
3904 : /**
3905 : * Returns a read/write reverse iterator that points to one before the
3906 : * first character in the %string. Iteration is done in reverse
3907 : * element order. Unshares the string.
3908 : */
3909 : reverse_iterator
3910 : rend() // FIXME C++11: should be noexcept.
3911 : { return reverse_iterator(this->begin()); }
3912 :
3913 : /**
3914 : * Returns a read-only (constant) reverse iterator that points
3915 : * to one before the first character in the %string. Iteration
3916 : * is done in reverse element order.
3917 : */
3918 : const_reverse_iterator
3919 : rend() const _GLIBCXX_NOEXCEPT
3920 : { return const_reverse_iterator(this->begin()); }
3921 :
3922 : #if __cplusplus >= 201103L
3923 : /**
3924 : * Returns a read-only (constant) iterator that points to the first
3925 : * character in the %string.
3926 : */
3927 : const_iterator
3928 : cbegin() const noexcept
3929 : { return const_iterator(this->_M_data()); }
3930 :
3931 : /**
3932 : * Returns a read-only (constant) iterator that points one past the
3933 : * last character in the %string.
3934 : */
3935 : const_iterator
3936 : cend() const noexcept
3937 : { return const_iterator(this->_M_data() + this->size()); }
3938 :
3939 : /**
3940 : * Returns a read-only (constant) reverse iterator that points
3941 : * to the last character in the %string. Iteration is done in
3942 : * reverse element order.
3943 : */
3944 : const_reverse_iterator
3945 : crbegin() const noexcept
3946 : { return const_reverse_iterator(this->end()); }
3947 :
3948 : /**
3949 : * Returns a read-only (constant) reverse iterator that points
3950 : * to one before the first character in the %string. Iteration
3951 : * is done in reverse element order.
3952 : */
3953 : const_reverse_iterator
3954 : crend() const noexcept
3955 : { return const_reverse_iterator(this->begin()); }
3956 : #endif
3957 :
3958 : public:
3959 : // Capacity:
3960 : /// Returns the number of characters in the string, not including any
3961 : /// null-termination.
3962 : size_type
3963 : size() const _GLIBCXX_NOEXCEPT
3964 : { return _M_rep()->_M_length; }
3965 :
3966 : /// Returns the number of characters in the string, not including any
3967 : /// null-termination.
3968 : size_type
3969 : length() const _GLIBCXX_NOEXCEPT
3970 : { return _M_rep()->_M_length; }
3971 :
3972 : /// Returns the size() of the largest possible %string.
3973 : size_type
3974 : max_size() const _GLIBCXX_NOEXCEPT
3975 : { return _Rep::_S_max_size; }
3976 :
3977 : /**
3978 : * @brief Resizes the %string to the specified number of characters.
3979 : * @param __n Number of characters the %string should contain.
3980 : * @param __c Character to fill any new elements.
3981 : *
3982 : * This function will %resize the %string to the specified
3983 : * number of characters. If the number is smaller than the
3984 : * %string's current size the %string is truncated, otherwise
3985 : * the %string is extended and new elements are %set to @a __c.
3986 : */
3987 : void
3988 : resize(size_type __n, _CharT __c);
3989 :
3990 : /**
3991 : * @brief Resizes the %string to the specified number of characters.
3992 : * @param __n Number of characters the %string should contain.
3993 : *
3994 : * This function will resize the %string to the specified length. If
3995 : * the new size is smaller than the %string's current size the %string
3996 : * is truncated, otherwise the %string is extended and new characters
3997 : * are default-constructed. For basic types such as char, this means
3998 : * setting them to 0.
3999 : */
4000 : void
4001 : resize(size_type __n)
4002 : { this->resize(__n, _CharT()); }
4003 :
4004 : #if __cplusplus >= 201103L
4005 : #pragma GCC diagnostic push
4006 : #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
4007 : /// A non-binding request to reduce capacity() to size().
4008 : void
4009 : shrink_to_fit() noexcept
4010 : { reserve(); }
4011 : #pragma GCC diagnostic pop
4012 : #endif
4013 :
4014 : /**
4015 : * Returns the total number of characters that the %string can hold
4016 : * before needing to allocate more memory.
4017 : */
4018 : size_type
4019 : capacity() const _GLIBCXX_NOEXCEPT
4020 : { return _M_rep()->_M_capacity; }
4021 :
4022 : /**
4023 : * @brief Attempt to preallocate enough memory for specified number of
4024 : * characters.
4025 : * @param __res_arg Number of characters required.
4026 : * @throw std::length_error If @a __res_arg exceeds @c max_size().
4027 : *
4028 : * This function attempts to reserve enough memory for the
4029 : * %string to hold the specified number of characters. If the
4030 : * number requested is more than max_size(), length_error is
4031 : * thrown.
4032 : *
4033 : * The advantage of this function is that if optimal code is a
4034 : * necessity and the user can determine the string length that will be
4035 : * required, the user can reserve the memory in %advance, and thus
4036 : * prevent a possible reallocation of memory and copying of %string
4037 : * data.
4038 : */
4039 : void
4040 : reserve(size_type __res_arg);
4041 :
4042 : /// Equivalent to shrink_to_fit().
4043 : #if __cplusplus > 201703L
4044 : [[deprecated("use shrink_to_fit() instead")]]
4045 : #endif
4046 : void
4047 : reserve();
4048 :
4049 : /**
4050 : * Erases the string, making it empty.
4051 : */
4052 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
4053 : void
4054 : clear() _GLIBCXX_NOEXCEPT
4055 : {
4056 : if (_M_rep()->_M_is_shared())
4057 : {
4058 : _M_rep()->_M_dispose(this->get_allocator());
4059 : _M_data(_S_empty_rep()._M_refdata());
4060 : }
4061 : else
4062 : _M_rep()->_M_set_length_and_sharable(0);
4063 : }
4064 : #else
4065 : // PR 56166: this should not throw.
4066 : void
4067 : clear()
4068 : { _M_mutate(0, this->size(), 0); }
4069 : #endif
4070 :
4071 : /**
4072 : * Returns true if the %string is empty. Equivalent to
4073 : * <code>*this == ""</code>.
4074 : */
4075 : _GLIBCXX_NODISCARD bool
4076 : empty() const _GLIBCXX_NOEXCEPT
4077 : { return this->size() == 0; }
4078 :
4079 : // Element access:
4080 : /**
4081 : * @brief Subscript access to the data contained in the %string.
4082 : * @param __pos The index of the character to access.
4083 : * @return Read-only (constant) reference to the character.
4084 : *
4085 : * This operator allows for easy, array-style, data access.
4086 : * Note that data access with this operator is unchecked and
4087 : * out_of_range lookups are not defined. (For checked lookups
4088 : * see at().)
4089 : */
4090 : const_reference
4091 : operator[] (size_type __pos) const _GLIBCXX_NOEXCEPT
4092 : {
4093 : __glibcxx_assert(__pos <= size());
4094 : return _M_data()[__pos];
4095 : }
4096 :
4097 : /**
4098 : * @brief Subscript access to the data contained in the %string.
4099 : * @param __pos The index of the character to access.
4100 : * @return Read/write reference to the character.
4101 : *
4102 : * This operator allows for easy, array-style, data access.
4103 : * Note that data access with this operator is unchecked and
4104 : * out_of_range lookups are not defined. (For checked lookups
4105 : * see at().) Unshares the string.
4106 : */
4107 : reference
4108 : operator[](size_type __pos)
4109 : {
4110 : // Allow pos == size() both in C++98 mode, as v3 extension,
4111 : // and in C++11 mode.
4112 : __glibcxx_assert(__pos <= size());
4113 : // In pedantic mode be strict in C++98 mode.
4114 : _GLIBCXX_DEBUG_PEDASSERT(__cplusplus >= 201103L || __pos < size());
4115 : _M_leak();
4116 : return _M_data()[__pos];
4117 : }
4118 :
4119 : /**
4120 : * @brief Provides access to the data contained in the %string.
4121 : * @param __n The index of the character to access.
4122 : * @return Read-only (const) reference to the character.
4123 : * @throw std::out_of_range If @a n is an invalid index.
4124 : *
4125 : * This function provides for safer data access. The parameter is
4126 : * first checked that it is in the range of the string. The function
4127 : * throws out_of_range if the check fails.
4128 : */
4129 : const_reference
4130 : at(size_type __n) const
4131 : {
4132 : if (__n >= this->size())
4133 : __throw_out_of_range_fmt(__N("basic_string::at: __n "
4134 : "(which is %zu) >= this->size() "
4135 : "(which is %zu)"),
4136 : __n, this->size());
4137 : return _M_data()[__n];
4138 : }
4139 :
4140 : /**
4141 : * @brief Provides access to the data contained in the %string.
4142 : * @param __n The index of the character to access.
4143 : * @return Read/write reference to the character.
4144 : * @throw std::out_of_range If @a n is an invalid index.
4145 : *
4146 : * This function provides for safer data access. The parameter is
4147 : * first checked that it is in the range of the string. The function
4148 : * throws out_of_range if the check fails. Success results in
4149 : * unsharing the string.
4150 : */
4151 : reference
4152 : at(size_type __n)
4153 : {
4154 : if (__n >= size())
4155 : __throw_out_of_range_fmt(__N("basic_string::at: __n "
4156 : "(which is %zu) >= this->size() "
4157 : "(which is %zu)"),
4158 : __n, this->size());
4159 : _M_leak();
4160 : return _M_data()[__n];
4161 : }
4162 :
4163 : #if __cplusplus >= 201103L
4164 : /**
4165 : * Returns a read/write reference to the data at the first
4166 : * element of the %string.
4167 : */
4168 : reference
4169 : front()
4170 : {
4171 : __glibcxx_assert(!empty());
4172 : return operator[](0);
4173 : }
4174 :
4175 : /**
4176 : * Returns a read-only (constant) reference to the data at the first
4177 : * element of the %string.
4178 : */
4179 : const_reference
4180 : front() const noexcept
4181 : {
4182 : __glibcxx_assert(!empty());
4183 : return operator[](0);
4184 : }
4185 :
4186 : /**
4187 : * Returns a read/write reference to the data at the last
4188 : * element of the %string.
4189 : */
4190 : reference
4191 : back()
4192 : {
4193 : __glibcxx_assert(!empty());
4194 : return operator[](this->size() - 1);
4195 : }
4196 :
4197 : /**
4198 : * Returns a read-only (constant) reference to the data at the
4199 : * last element of the %string.
4200 : */
4201 : const_reference
4202 : back() const noexcept
4203 : {
4204 : __glibcxx_assert(!empty());
4205 : return operator[](this->size() - 1);
4206 : }
4207 : #endif
4208 :
4209 : // Modifiers:
4210 : /**
4211 : * @brief Append a string to this string.
4212 : * @param __str The string to append.
4213 : * @return Reference to this string.
4214 : */
4215 : basic_string&
4216 : operator+=(const basic_string& __str)
4217 : { return this->append(__str); }
4218 :
4219 : /**
4220 : * @brief Append a C string.
4221 : * @param __s The C string to append.
4222 : * @return Reference to this string.
4223 : */
4224 : basic_string&
4225 : operator+=(const _CharT* __s)
4226 : { return this->append(__s); }
4227 :
4228 : /**
4229 : * @brief Append a character.
4230 : * @param __c The character to append.
4231 : * @return Reference to this string.
4232 : */
4233 : basic_string&
4234 : operator+=(_CharT __c)
4235 : {
4236 : this->push_back(__c);
4237 : return *this;
4238 : }
4239 :
4240 : #if __cplusplus >= 201103L
4241 : /**
4242 : * @brief Append an initializer_list of characters.
4243 : * @param __l The initializer_list of characters to be appended.
4244 : * @return Reference to this string.
4245 : */
4246 : basic_string&
4247 : operator+=(initializer_list<_CharT> __l)
4248 : { return this->append(__l.begin(), __l.size()); }
4249 : #endif // C++11
4250 :
4251 : #if __cplusplus >= 201703L
4252 : /**
4253 : * @brief Append a string_view.
4254 : * @param __svt The object convertible to string_view to be appended.
4255 : * @return Reference to this string.
4256 : */
4257 : template<typename _Tp>
4258 : _If_sv<_Tp, basic_string&>
4259 : operator+=(const _Tp& __svt)
4260 : { return this->append(__svt); }
4261 : #endif // C++17
4262 :
4263 : /**
4264 : * @brief Append a string to this string.
4265 : * @param __str The string to append.
4266 : * @return Reference to this string.
4267 : */
4268 : basic_string&
4269 : append(const basic_string& __str);
4270 :
4271 : /**
4272 : * @brief Append a substring.
4273 : * @param __str The string to append.
4274 : * @param __pos Index of the first character of str to append.
4275 : * @param __n The number of characters to append.
4276 : * @return Reference to this string.
4277 : * @throw std::out_of_range if @a __pos is not a valid index.
4278 : *
4279 : * This function appends @a __n characters from @a __str
4280 : * starting at @a __pos to this string. If @a __n is is larger
4281 : * than the number of available characters in @a __str, the
4282 : * remainder of @a __str is appended.
4283 : */
4284 : basic_string&
4285 : append(const basic_string& __str, size_type __pos, size_type __n = npos);
4286 :
4287 : /**
4288 : * @brief Append a C substring.
4289 : * @param __s The C string to append.
4290 : * @param __n The number of characters to append.
4291 : * @return Reference to this string.
4292 : */
4293 : basic_string&
4294 : append(const _CharT* __s, size_type __n);
4295 :
4296 : /**
4297 : * @brief Append a C string.
4298 : * @param __s The C string to append.
4299 : * @return Reference to this string.
4300 : */
4301 : basic_string&
4302 : append(const _CharT* __s)
4303 : {
4304 : __glibcxx_requires_string(__s);
4305 : return this->append(__s, traits_type::length(__s));
4306 : }
4307 :
4308 : /**
4309 : * @brief Append multiple characters.
4310 : * @param __n The number of characters to append.
4311 : * @param __c The character to use.
4312 : * @return Reference to this string.
4313 : *
4314 : * Appends __n copies of __c to this string.
4315 : */
4316 : basic_string&
4317 : append(size_type __n, _CharT __c);
4318 :
4319 : #if __cplusplus >= 201103L
4320 : /**
4321 : * @brief Append an initializer_list of characters.
4322 : * @param __l The initializer_list of characters to append.
4323 : * @return Reference to this string.
4324 : */
4325 : basic_string&
4326 : append(initializer_list<_CharT> __l)
4327 : { return this->append(__l.begin(), __l.size()); }
4328 : #endif // C++11
4329 :
4330 : /**
4331 : * @brief Append a range of characters.
4332 : * @param __first Iterator referencing the first character to append.
4333 : * @param __last Iterator marking the end of the range.
4334 : * @return Reference to this string.
4335 : *
4336 : * Appends characters in the range [__first,__last) to this string.
4337 : */
4338 : template<class _InputIterator>
4339 : basic_string&
4340 : append(_InputIterator __first, _InputIterator __last)
4341 : { return this->replace(_M_iend(), _M_iend(), __first, __last); }
4342 :
4343 : #if __cplusplus >= 201703L
4344 : /**
4345 : * @brief Append a string_view.
4346 : * @param __svt The object convertible to string_view to be appended.
4347 : * @return Reference to this string.
4348 : */
4349 : template<typename _Tp>
4350 : _If_sv<_Tp, basic_string&>
4351 : append(const _Tp& __svt)
4352 : {
4353 : __sv_type __sv = __svt;
4354 : return this->append(__sv.data(), __sv.size());
4355 : }
4356 :
4357 : /**
4358 : * @brief Append a range of characters from a string_view.
4359 : * @param __svt The object convertible to string_view to be appended
4360 : * from.
4361 : * @param __pos The position in the string_view to append from.
4362 : * @param __n The number of characters to append from the string_view.
4363 : * @return Reference to this string.
4364 : */
4365 : template<typename _Tp>
4366 : _If_sv<_Tp, basic_string&>
4367 : append(const _Tp& __svt, size_type __pos, size_type __n = npos)
4368 : {
4369 : __sv_type __sv = __svt;
4370 : return append(__sv.data()
4371 : + std::__sv_check(__sv.size(), __pos, "basic_string::append"),
4372 : std::__sv_limit(__sv.size(), __pos, __n));
4373 : }
4374 : #endif // C++17
4375 :
4376 : /**
4377 : * @brief Append a single character.
4378 : * @param __c Character to append.
4379 : */
4380 : void
4381 : push_back(_CharT __c)
4382 : {
4383 : const size_type __len = 1 + this->size();
4384 : if (__len > this->capacity() || _M_rep()->_M_is_shared())
4385 : this->reserve(__len);
4386 : traits_type::assign(_M_data()[this->size()], __c);
4387 : _M_rep()->_M_set_length_and_sharable(__len);
4388 : }
4389 :
4390 : /**
4391 : * @brief Set value to contents of another string.
4392 : * @param __str Source string to use.
4393 : * @return Reference to this string.
4394 : */
4395 : basic_string&
4396 : assign(const basic_string& __str);
4397 :
4398 : #if __cplusplus >= 201103L
4399 : /**
4400 : * @brief Set value to contents of another string.
4401 : * @param __str Source string to use.
4402 : * @return Reference to this string.
4403 : *
4404 : * This function sets this string to the exact contents of @a __str.
4405 : * @a __str is a valid, but unspecified string.
4406 : */
4407 : basic_string&
4408 : assign(basic_string&& __str)
4409 : noexcept(allocator_traits<_Alloc>::is_always_equal::value)
4410 : {
4411 : this->swap(__str);
4412 : return *this;
4413 : }
4414 : #endif // C++11
4415 :
4416 : /**
4417 : * @brief Set value to a substring of a string.
4418 : * @param __str The string to use.
4419 : * @param __pos Index of the first character of str.
4420 : * @param __n Number of characters to use.
4421 : * @return Reference to this string.
4422 : * @throw std::out_of_range if @a pos is not a valid index.
4423 : *
4424 : * This function sets this string to the substring of @a __str
4425 : * consisting of @a __n characters at @a __pos. If @a __n is
4426 : * is larger than the number of available characters in @a
4427 : * __str, the remainder of @a __str is used.
4428 : */
4429 : basic_string&
4430 : assign(const basic_string& __str, size_type __pos, size_type __n = npos)
4431 : { return this->assign(__str._M_data()
4432 : + __str._M_check(__pos, "basic_string::assign"),
4433 : __str._M_limit(__pos, __n)); }
4434 :
4435 : /**
4436 : * @brief Set value to a C substring.
4437 : * @param __s The C string to use.
4438 : * @param __n Number of characters to use.
4439 : * @return Reference to this string.
4440 : *
4441 : * This function sets the value of this string to the first @a __n
4442 : * characters of @a __s. If @a __n is is larger than the number of
4443 : * available characters in @a __s, the remainder of @a __s is used.
4444 : */
4445 : basic_string&
4446 : assign(const _CharT* __s, size_type __n);
4447 :
4448 : /**
4449 : * @brief Set value to contents of a C string.
4450 : * @param __s The C string to use.
4451 : * @return Reference to this string.
4452 : *
4453 : * This function sets the value of this string to the value of @a __s.
4454 : * The data is copied, so there is no dependence on @a __s once the
4455 : * function returns.
4456 : */
4457 : basic_string&
4458 : assign(const _CharT* __s)
4459 : {
4460 : __glibcxx_requires_string(__s);
4461 : return this->assign(__s, traits_type::length(__s));
4462 : }
4463 :
4464 : /**
4465 : * @brief Set value to multiple characters.
4466 : * @param __n Length of the resulting string.
4467 : * @param __c The character to use.
4468 : * @return Reference to this string.
4469 : *
4470 : * This function sets the value of this string to @a __n copies of
4471 : * character @a __c.
4472 : */
4473 : basic_string&
4474 : assign(size_type __n, _CharT __c)
4475 : { return _M_replace_aux(size_type(0), this->size(), __n, __c); }
4476 :
4477 : /**
4478 : * @brief Set value to a range of characters.
4479 : * @param __first Iterator referencing the first character to append.
4480 : * @param __last Iterator marking the end of the range.
4481 : * @return Reference to this string.
4482 : *
4483 : * Sets value of string to characters in the range [__first,__last).
4484 : */
4485 : template<class _InputIterator>
4486 : basic_string&
4487 : assign(_InputIterator __first, _InputIterator __last)
4488 : { return this->replace(_M_ibegin(), _M_iend(), __first, __last); }
4489 :
4490 : #if __cplusplus >= 201103L
4491 : /**
4492 : * @brief Set value to an initializer_list of characters.
4493 : * @param __l The initializer_list of characters to assign.
4494 : * @return Reference to this string.
4495 : */
4496 : basic_string&
4497 : assign(initializer_list<_CharT> __l)
4498 : { return this->assign(__l.begin(), __l.size()); }
4499 : #endif // C++11
4500 :
4501 : #if __cplusplus >= 201703L
4502 : /**
4503 : * @brief Set value from a string_view.
4504 : * @param __svt The source object convertible to string_view.
4505 : * @return Reference to this string.
4506 : */
4507 : template<typename _Tp>
4508 : _If_sv<_Tp, basic_string&>
4509 : assign(const _Tp& __svt)
4510 : {
4511 : __sv_type __sv = __svt;
4512 : return this->assign(__sv.data(), __sv.size());
4513 : }
4514 :
4515 : /**
4516 : * @brief Set value from a range of characters in a string_view.
4517 : * @param __svt The source object convertible to string_view.
4518 : * @param __pos The position in the string_view to assign from.
4519 : * @param __n The number of characters to assign.
4520 : * @return Reference to this string.
4521 : */
4522 : template<typename _Tp>
4523 : _If_sv<_Tp, basic_string&>
4524 : assign(const _Tp& __svt, size_type __pos, size_type __n = npos)
4525 : {
4526 : __sv_type __sv = __svt;
4527 : return assign(__sv.data()
4528 : + std::__sv_check(__sv.size(), __pos, "basic_string::assign"),
4529 : std::__sv_limit(__sv.size(), __pos, __n));
4530 : }
4531 : #endif // C++17
4532 :
4533 : /**
4534 : * @brief Insert multiple characters.
4535 : * @param __p Iterator referencing location in string to insert at.
4536 : * @param __n Number of characters to insert
4537 : * @param __c The character to insert.
4538 : * @throw std::length_error If new length exceeds @c max_size().
4539 : *
4540 : * Inserts @a __n copies of character @a __c starting at the
4541 : * position referenced by iterator @a __p. If adding
4542 : * characters causes the length to exceed max_size(),
4543 : * length_error is thrown. The value of the string doesn't
4544 : * change if an error is thrown.
4545 : */
4546 : void
4547 : insert(iterator __p, size_type __n, _CharT __c)
4548 : { this->replace(__p, __p, __n, __c); }
4549 :
4550 : /**
4551 : * @brief Insert a range of characters.
4552 : * @param __p Iterator referencing location in string to insert at.
4553 : * @param __beg Start of range.
4554 : * @param __end End of range.
4555 : * @throw std::length_error If new length exceeds @c max_size().
4556 : *
4557 : * Inserts characters in range [__beg,__end). If adding
4558 : * characters causes the length to exceed max_size(),
4559 : * length_error is thrown. The value of the string doesn't
4560 : * change if an error is thrown.
4561 : */
4562 : template<class _InputIterator>
4563 : void
4564 : insert(iterator __p, _InputIterator __beg, _InputIterator __end)
4565 : { this->replace(__p, __p, __beg, __end); }
4566 :
4567 : #if __cplusplus >= 201103L
4568 : /**
4569 : * @brief Insert an initializer_list of characters.
4570 : * @param __p Iterator referencing location in string to insert at.
4571 : * @param __l The initializer_list of characters to insert.
4572 : * @throw std::length_error If new length exceeds @c max_size().
4573 : */
4574 : void
4575 : insert(iterator __p, initializer_list<_CharT> __l)
4576 : {
4577 : _GLIBCXX_DEBUG_PEDASSERT(__p >= _M_ibegin() && __p <= _M_iend());
4578 : this->insert(__p - _M_ibegin(), __l.begin(), __l.size());
4579 : }
4580 : #endif // C++11
4581 :
4582 : /**
4583 : * @brief Insert value of a string.
4584 : * @param __pos1 Position in string to insert at.
4585 : * @param __str The string to insert.
4586 : * @return Reference to this string.
4587 : * @throw std::length_error If new length exceeds @c max_size().
4588 : *
4589 : * Inserts value of @a __str starting at @a __pos1. If adding
4590 : * characters causes the length to exceed max_size(),
4591 : * length_error is thrown. The value of the string doesn't
4592 : * change if an error is thrown.
4593 : */
4594 : basic_string&
4595 : insert(size_type __pos1, const basic_string& __str)
4596 : { return this->insert(__pos1, __str, size_type(0), __str.size()); }
4597 :
4598 : /**
4599 : * @brief Insert a substring.
4600 : * @param __pos1 Position in string to insert at.
4601 : * @param __str The string to insert.
4602 : * @param __pos2 Start of characters in str to insert.
4603 : * @param __n Number of characters to insert.
4604 : * @return Reference to this string.
4605 : * @throw std::length_error If new length exceeds @c max_size().
4606 : * @throw std::out_of_range If @a pos1 > size() or
4607 : * @a __pos2 > @a str.size().
4608 : *
4609 : * Starting at @a pos1, insert @a __n character of @a __str
4610 : * beginning with @a __pos2. If adding characters causes the
4611 : * length to exceed max_size(), length_error is thrown. If @a
4612 : * __pos1 is beyond the end of this string or @a __pos2 is
4613 : * beyond the end of @a __str, out_of_range is thrown. The
4614 : * value of the string doesn't change if an error is thrown.
4615 : */
4616 : basic_string&
4617 : insert(size_type __pos1, const basic_string& __str,
4618 : size_type __pos2, size_type __n = npos)
4619 : { return this->insert(__pos1, __str._M_data()
4620 : + __str._M_check(__pos2, "basic_string::insert"),
4621 : __str._M_limit(__pos2, __n)); }
4622 :
4623 : /**
4624 : * @brief Insert a C substring.
4625 : * @param __pos Position in string to insert at.
4626 : * @param __s The C string to insert.
4627 : * @param __n The number of characters to insert.
4628 : * @return Reference to this string.
4629 : * @throw std::length_error If new length exceeds @c max_size().
4630 : * @throw std::out_of_range If @a __pos is beyond the end of this
4631 : * string.
4632 : *
4633 : * Inserts the first @a __n characters of @a __s starting at @a
4634 : * __pos. If adding characters causes the length to exceed
4635 : * max_size(), length_error is thrown. If @a __pos is beyond
4636 : * end(), out_of_range is thrown. The value of the string
4637 : * doesn't change if an error is thrown.
4638 : */
4639 : basic_string&
4640 : insert(size_type __pos, const _CharT* __s, size_type __n);
4641 :
4642 : /**
4643 : * @brief Insert a C string.
4644 : * @param __pos Position in string to insert at.
4645 : * @param __s The C string to insert.
4646 : * @return Reference to this string.
4647 : * @throw std::length_error If new length exceeds @c max_size().
4648 : * @throw std::out_of_range If @a pos is beyond the end of this
4649 : * string.
4650 : *
4651 : * Inserts the first @a n characters of @a __s starting at @a __pos. If
4652 : * adding characters causes the length to exceed max_size(),
4653 : * length_error is thrown. If @a __pos is beyond end(), out_of_range is
4654 : * thrown. The value of the string doesn't change if an error is
4655 : * thrown.
4656 : */
4657 : basic_string&
4658 : insert(size_type __pos, const _CharT* __s)
4659 : {
4660 : __glibcxx_requires_string(__s);
4661 : return this->insert(__pos, __s, traits_type::length(__s));
4662 : }
4663 :
4664 : /**
4665 : * @brief Insert multiple characters.
4666 : * @param __pos Index in string to insert at.
4667 : * @param __n Number of characters to insert
4668 : * @param __c The character to insert.
4669 : * @return Reference to this string.
4670 : * @throw std::length_error If new length exceeds @c max_size().
4671 : * @throw std::out_of_range If @a __pos is beyond the end of this
4672 : * string.
4673 : *
4674 : * Inserts @a __n copies of character @a __c starting at index
4675 : * @a __pos. If adding characters causes the length to exceed
4676 : * max_size(), length_error is thrown. If @a __pos > length(),
4677 : * out_of_range is thrown. The value of the string doesn't
4678 : * change if an error is thrown.
4679 : */
4680 : basic_string&
4681 : insert(size_type __pos, size_type __n, _CharT __c)
4682 : { return _M_replace_aux(_M_check(__pos, "basic_string::insert"),
4683 : size_type(0), __n, __c); }
4684 :
4685 : /**
4686 : * @brief Insert one character.
4687 : * @param __p Iterator referencing position in string to insert at.
4688 : * @param __c The character to insert.
4689 : * @return Iterator referencing newly inserted char.
4690 : * @throw std::length_error If new length exceeds @c max_size().
4691 : *
4692 : * Inserts character @a __c at position referenced by @a __p.
4693 : * If adding character causes the length to exceed max_size(),
4694 : * length_error is thrown. If @a __p is beyond end of string,
4695 : * out_of_range is thrown. The value of the string doesn't
4696 : * change if an error is thrown.
4697 : */
4698 : iterator
4699 : insert(iterator __p, _CharT __c)
4700 : {
4701 : _GLIBCXX_DEBUG_PEDASSERT(__p >= _M_ibegin() && __p <= _M_iend());
4702 : const size_type __pos = __p - _M_ibegin();
4703 : _M_replace_aux(__pos, size_type(0), size_type(1), __c);
4704 : _M_rep()->_M_set_leaked();
4705 : return iterator(_M_data() + __pos);
4706 : }
4707 :
4708 : #if __cplusplus >= 201703L
4709 : /**
4710 : * @brief Insert a string_view.
4711 : * @param __pos Position in string to insert at.
4712 : * @param __svt The object convertible to string_view to insert.
4713 : * @return Reference to this string.
4714 : */
4715 : template<typename _Tp>
4716 : _If_sv<_Tp, basic_string&>
4717 : insert(size_type __pos, const _Tp& __svt)
4718 : {
4719 : __sv_type __sv = __svt;
4720 : return this->insert(__pos, __sv.data(), __sv.size());
4721 : }
4722 :
4723 : /**
4724 : * @brief Insert a string_view.
4725 : * @param __pos1 Position in string to insert at.
4726 : * @param __svt The object convertible to string_view to insert from.
4727 : * @param __pos2 Position in string_view to insert from.
4728 : * @param __n The number of characters to insert.
4729 : * @return Reference to this string.
4730 : */
4731 : template<typename _Tp>
4732 : _If_sv<_Tp, basic_string&>
4733 : insert(size_type __pos1, const _Tp& __svt,
4734 : size_type __pos2, size_type __n = npos)
4735 : {
4736 : __sv_type __sv = __svt;
4737 : return this->replace(__pos1, size_type(0), __sv.data()
4738 : + std::__sv_check(__sv.size(), __pos2, "basic_string::insert"),
4739 : std::__sv_limit(__sv.size(), __pos2, __n));
4740 : }
4741 : #endif // C++17
4742 :
4743 : /**
4744 : * @brief Remove characters.
4745 : * @param __pos Index of first character to remove (default 0).
4746 : * @param __n Number of characters to remove (default remainder).
4747 : * @return Reference to this string.
4748 : * @throw std::out_of_range If @a pos is beyond the end of this
4749 : * string.
4750 : *
4751 : * Removes @a __n characters from this string starting at @a
4752 : * __pos. The length of the string is reduced by @a __n. If
4753 : * there are < @a __n characters to remove, the remainder of
4754 : * the string is truncated. If @a __p is beyond end of string,
4755 : * out_of_range is thrown. The value of the string doesn't
4756 : * change if an error is thrown.
4757 : */
4758 : basic_string&
4759 : erase(size_type __pos = 0, size_type __n = npos)
4760 : {
4761 : _M_mutate(_M_check(__pos, "basic_string::erase"),
4762 : _M_limit(__pos, __n), size_type(0));
4763 : return *this;
4764 : }
4765 :
4766 : /**
4767 : * @brief Remove one character.
4768 : * @param __position Iterator referencing the character to remove.
4769 : * @return iterator referencing same location after removal.
4770 : *
4771 : * Removes the character at @a __position from this string. The value
4772 : * of the string doesn't change if an error is thrown.
4773 : */
4774 : iterator
4775 : erase(iterator __position)
4776 : {
4777 : _GLIBCXX_DEBUG_PEDASSERT(__position >= _M_ibegin()
4778 : && __position < _M_iend());
4779 : const size_type __pos = __position - _M_ibegin();
4780 : _M_mutate(__pos, size_type(1), size_type(0));
4781 : _M_rep()->_M_set_leaked();
4782 : return iterator(_M_data() + __pos);
4783 : }
4784 :
4785 : /**
4786 : * @brief Remove a range of characters.
4787 : * @param __first Iterator referencing the first character to remove.
4788 : * @param __last Iterator referencing the end of the range.
4789 : * @return Iterator referencing location of first after removal.
4790 : *
4791 : * Removes the characters in the range [first,last) from this string.
4792 : * The value of the string doesn't change if an error is thrown.
4793 : */
4794 : iterator
4795 : erase(iterator __first, iterator __last);
4796 :
4797 : #if __cplusplus >= 201103L
4798 : /**
4799 : * @brief Remove the last character.
4800 : *
4801 : * The string must be non-empty.
4802 : */
4803 : void
4804 : pop_back() // FIXME C++11: should be noexcept.
4805 : {
4806 : __glibcxx_assert(!empty());
4807 : erase(size() - 1, 1);
4808 : }
4809 : #endif // C++11
4810 :
4811 : /**
4812 : * @brief Replace characters with value from another string.
4813 : * @param __pos Index of first character to replace.
4814 : * @param __n Number of characters to be replaced.
4815 : * @param __str String to insert.
4816 : * @return Reference to this string.
4817 : * @throw std::out_of_range If @a pos is beyond the end of this
4818 : * string.
4819 : * @throw std::length_error If new length exceeds @c max_size().
4820 : *
4821 : * Removes the characters in the range [__pos,__pos+__n) from
4822 : * this string. In place, the value of @a __str is inserted.
4823 : * If @a __pos is beyond end of string, out_of_range is thrown.
4824 : * If the length of the result exceeds max_size(), length_error
4825 : * is thrown. The value of the string doesn't change if an
4826 : * error is thrown.
4827 : */
4828 : basic_string&
4829 : replace(size_type __pos, size_type __n, const basic_string& __str)
4830 : { return this->replace(__pos, __n, __str._M_data(), __str.size()); }
4831 :
4832 : /**
4833 : * @brief Replace characters with value from another string.
4834 : * @param __pos1 Index of first character to replace.
4835 : * @param __n1 Number of characters to be replaced.
4836 : * @param __str String to insert.
4837 : * @param __pos2 Index of first character of str to use.
4838 : * @param __n2 Number of characters from str to use.
4839 : * @return Reference to this string.
4840 : * @throw std::out_of_range If @a __pos1 > size() or @a __pos2 >
4841 : * __str.size().
4842 : * @throw std::length_error If new length exceeds @c max_size().
4843 : *
4844 : * Removes the characters in the range [__pos1,__pos1 + n) from this
4845 : * string. In place, the value of @a __str is inserted. If @a __pos is
4846 : * beyond end of string, out_of_range is thrown. If the length of the
4847 : * result exceeds max_size(), length_error is thrown. The value of the
4848 : * string doesn't change if an error is thrown.
4849 : */
4850 : basic_string&
4851 : replace(size_type __pos1, size_type __n1, const basic_string& __str,
4852 : size_type __pos2, size_type __n2 = npos)
4853 : { return this->replace(__pos1, __n1, __str._M_data()
4854 : + __str._M_check(__pos2, "basic_string::replace"),
4855 : __str._M_limit(__pos2, __n2)); }
4856 :
4857 : /**
4858 : * @brief Replace characters with value of a C substring.
4859 : * @param __pos Index of first character to replace.
4860 : * @param __n1 Number of characters to be replaced.
4861 : * @param __s C string to insert.
4862 : * @param __n2 Number of characters from @a s to use.
4863 : * @return Reference to this string.
4864 : * @throw std::out_of_range If @a pos1 > size().
4865 : * @throw std::length_error If new length exceeds @c max_size().
4866 : *
4867 : * Removes the characters in the range [__pos,__pos + __n1)
4868 : * from this string. In place, the first @a __n2 characters of
4869 : * @a __s are inserted, or all of @a __s if @a __n2 is too large. If
4870 : * @a __pos is beyond end of string, out_of_range is thrown. If
4871 : * the length of result exceeds max_size(), length_error is
4872 : * thrown. The value of the string doesn't change if an error
4873 : * is thrown.
4874 : */
4875 : basic_string&
4876 : replace(size_type __pos, size_type __n1, const _CharT* __s,
4877 : size_type __n2);
4878 :
4879 : /**
4880 : * @brief Replace characters with value of a C string.
4881 : * @param __pos Index of first character to replace.
4882 : * @param __n1 Number of characters to be replaced.
4883 : * @param __s C string to insert.
4884 : * @return Reference to this string.
4885 : * @throw std::out_of_range If @a pos > size().
4886 : * @throw std::length_error If new length exceeds @c max_size().
4887 : *
4888 : * Removes the characters in the range [__pos,__pos + __n1)
4889 : * from this string. In place, the characters of @a __s are
4890 : * inserted. If @a __pos is beyond end of string, out_of_range
4891 : * is thrown. If the length of result exceeds max_size(),
4892 : * length_error is thrown. The value of the string doesn't
4893 : * change if an error is thrown.
4894 : */
4895 : basic_string&
4896 : replace(size_type __pos, size_type __n1, const _CharT* __s)
4897 : {
4898 : __glibcxx_requires_string(__s);
4899 : return this->replace(__pos, __n1, __s, traits_type::length(__s));
4900 : }
4901 :
4902 : /**
4903 : * @brief Replace characters with multiple characters.
4904 : * @param __pos Index of first character to replace.
4905 : * @param __n1 Number of characters to be replaced.
4906 : * @param __n2 Number of characters to insert.
4907 : * @param __c Character to insert.
4908 : * @return Reference to this string.
4909 : * @throw std::out_of_range If @a __pos > size().
4910 : * @throw std::length_error If new length exceeds @c max_size().
4911 : *
4912 : * Removes the characters in the range [pos,pos + n1) from this
4913 : * string. In place, @a __n2 copies of @a __c are inserted.
4914 : * If @a __pos is beyond end of string, out_of_range is thrown.
4915 : * If the length of result exceeds max_size(), length_error is
4916 : * thrown. The value of the string doesn't change if an error
4917 : * is thrown.
4918 : */
4919 : basic_string&
4920 : replace(size_type __pos, size_type __n1, size_type __n2, _CharT __c)
4921 : { return _M_replace_aux(_M_check(__pos, "basic_string::replace"),
4922 : _M_limit(__pos, __n1), __n2, __c); }
4923 :
4924 : /**
4925 : * @brief Replace range of characters with string.
4926 : * @param __i1 Iterator referencing start of range to replace.
4927 : * @param __i2 Iterator referencing end of range to replace.
4928 : * @param __str String value to insert.
4929 : * @return Reference to this string.
4930 : * @throw std::length_error If new length exceeds @c max_size().
4931 : *
4932 : * Removes the characters in the range [__i1,__i2). In place,
4933 : * the value of @a __str is inserted. If the length of result
4934 : * exceeds max_size(), length_error is thrown. The value of
4935 : * the string doesn't change if an error is thrown.
4936 : */
4937 : basic_string&
4938 : replace(iterator __i1, iterator __i2, const basic_string& __str)
4939 : { return this->replace(__i1, __i2, __str._M_data(), __str.size()); }
4940 :
4941 : /**
4942 : * @brief Replace range of characters with C substring.
4943 : * @param __i1 Iterator referencing start of range to replace.
4944 : * @param __i2 Iterator referencing end of range to replace.
4945 : * @param __s C string value to insert.
4946 : * @param __n Number of characters from s to insert.
4947 : * @return Reference to this string.
4948 : * @throw std::length_error If new length exceeds @c max_size().
4949 : *
4950 : * Removes the characters in the range [__i1,__i2). In place,
4951 : * the first @a __n characters of @a __s are inserted. If the
4952 : * length of result exceeds max_size(), length_error is thrown.
4953 : * The value of the string doesn't change if an error is
4954 : * thrown.
4955 : */
4956 : basic_string&
4957 : replace(iterator __i1, iterator __i2, const _CharT* __s, size_type __n)
4958 : {
4959 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
4960 : && __i2 <= _M_iend());
4961 : return this->replace(__i1 - _M_ibegin(), __i2 - __i1, __s, __n);
4962 : }
4963 :
4964 : /**
4965 : * @brief Replace range of characters with C string.
4966 : * @param __i1 Iterator referencing start of range to replace.
4967 : * @param __i2 Iterator referencing end of range to replace.
4968 : * @param __s C string value to insert.
4969 : * @return Reference to this string.
4970 : * @throw std::length_error If new length exceeds @c max_size().
4971 : *
4972 : * Removes the characters in the range [__i1,__i2). In place,
4973 : * the characters of @a __s are inserted. If the length of
4974 : * result exceeds max_size(), length_error is thrown. The
4975 : * value of the string doesn't change if an error is thrown.
4976 : */
4977 : basic_string&
4978 : replace(iterator __i1, iterator __i2, const _CharT* __s)
4979 : {
4980 : __glibcxx_requires_string(__s);
4981 : return this->replace(__i1, __i2, __s, traits_type::length(__s));
4982 : }
4983 :
4984 : /**
4985 : * @brief Replace range of characters with multiple characters
4986 : * @param __i1 Iterator referencing start of range to replace.
4987 : * @param __i2 Iterator referencing end of range to replace.
4988 : * @param __n Number of characters to insert.
4989 : * @param __c Character to insert.
4990 : * @return Reference to this string.
4991 : * @throw std::length_error If new length exceeds @c max_size().
4992 : *
4993 : * Removes the characters in the range [__i1,__i2). In place,
4994 : * @a __n copies of @a __c are inserted. If the length of
4995 : * result exceeds max_size(), length_error is thrown. The
4996 : * value of the string doesn't change if an error is thrown.
4997 : */
4998 : basic_string&
4999 : replace(iterator __i1, iterator __i2, size_type __n, _CharT __c)
5000 : {
5001 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
5002 : && __i2 <= _M_iend());
5003 : return _M_replace_aux(__i1 - _M_ibegin(), __i2 - __i1, __n, __c);
5004 : }
5005 :
5006 : /**
5007 : * @brief Replace range of characters with range.
5008 : * @param __i1 Iterator referencing start of range to replace.
5009 : * @param __i2 Iterator referencing end of range to replace.
5010 : * @param __k1 Iterator referencing start of range to insert.
5011 : * @param __k2 Iterator referencing end of range to insert.
5012 : * @return Reference to this string.
5013 : * @throw std::length_error If new length exceeds @c max_size().
5014 : *
5015 : * Removes the characters in the range [__i1,__i2). In place,
5016 : * characters in the range [__k1,__k2) are inserted. If the
5017 : * length of result exceeds max_size(), length_error is thrown.
5018 : * The value of the string doesn't change if an error is
5019 : * thrown.
5020 : */
5021 : template<class _InputIterator>
5022 : basic_string&
5023 : replace(iterator __i1, iterator __i2,
5024 : _InputIterator __k1, _InputIterator __k2)
5025 : {
5026 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
5027 : && __i2 <= _M_iend());
5028 : __glibcxx_requires_valid_range(__k1, __k2);
5029 : typedef typename std::__is_integer<_InputIterator>::__type _Integral;
5030 : return _M_replace_dispatch(__i1, __i2, __k1, __k2, _Integral());
5031 : }
5032 :
5033 : // Specializations for the common case of pointer and iterator:
5034 : // useful to avoid the overhead of temporary buffering in _M_replace.
5035 : basic_string&
5036 : replace(iterator __i1, iterator __i2, _CharT* __k1, _CharT* __k2)
5037 : {
5038 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
5039 : && __i2 <= _M_iend());
5040 : __glibcxx_requires_valid_range(__k1, __k2);
5041 : return this->replace(__i1 - _M_ibegin(), __i2 - __i1,
5042 : __k1, __k2 - __k1);
5043 : }
5044 :
5045 : basic_string&
5046 : replace(iterator __i1, iterator __i2,
5047 : const _CharT* __k1, const _CharT* __k2)
5048 : {
5049 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
5050 : && __i2 <= _M_iend());
5051 : __glibcxx_requires_valid_range(__k1, __k2);
5052 : return this->replace(__i1 - _M_ibegin(), __i2 - __i1,
5053 : __k1, __k2 - __k1);
5054 : }
5055 :
5056 : basic_string&
5057 : replace(iterator __i1, iterator __i2, iterator __k1, iterator __k2)
5058 : {
5059 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
5060 : && __i2 <= _M_iend());
5061 : __glibcxx_requires_valid_range(__k1, __k2);
5062 : return this->replace(__i1 - _M_ibegin(), __i2 - __i1,
5063 : __k1.base(), __k2 - __k1);
5064 : }
5065 :
5066 : basic_string&
5067 : replace(iterator __i1, iterator __i2,
5068 : const_iterator __k1, const_iterator __k2)
5069 : {
5070 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
5071 : && __i2 <= _M_iend());
5072 : __glibcxx_requires_valid_range(__k1, __k2);
5073 : return this->replace(__i1 - _M_ibegin(), __i2 - __i1,
5074 : __k1.base(), __k2 - __k1);
5075 : }
5076 :
5077 : #if __cplusplus >= 201103L
5078 : /**
5079 : * @brief Replace range of characters with initializer_list.
5080 : * @param __i1 Iterator referencing start of range to replace.
5081 : * @param __i2 Iterator referencing end of range to replace.
5082 : * @param __l The initializer_list of characters to insert.
5083 : * @return Reference to this string.
5084 : * @throw std::length_error If new length exceeds @c max_size().
5085 : *
5086 : * Removes the characters in the range [__i1,__i2). In place,
5087 : * characters in the range [__k1,__k2) are inserted. If the
5088 : * length of result exceeds max_size(), length_error is thrown.
5089 : * The value of the string doesn't change if an error is
5090 : * thrown.
5091 : */
5092 : basic_string& replace(iterator __i1, iterator __i2,
5093 : initializer_list<_CharT> __l)
5094 : { return this->replace(__i1, __i2, __l.begin(), __l.end()); }
5095 : #endif // C++11
5096 :
5097 : #if __cplusplus >= 201703L
5098 : /**
5099 : * @brief Replace range of characters with string_view.
5100 : * @param __pos The position to replace at.
5101 : * @param __n The number of characters to replace.
5102 : * @param __svt The object convertible to string_view to insert.
5103 : * @return Reference to this string.
5104 : */
5105 : template<typename _Tp>
5106 : _If_sv<_Tp, basic_string&>
5107 : replace(size_type __pos, size_type __n, const _Tp& __svt)
5108 : {
5109 : __sv_type __sv = __svt;
5110 : return this->replace(__pos, __n, __sv.data(), __sv.size());
5111 : }
5112 :
5113 : /**
5114 : * @brief Replace range of characters with string_view.
5115 : * @param __pos1 The position to replace at.
5116 : * @param __n1 The number of characters to replace.
5117 : * @param __svt The object convertible to string_view to insert from.
5118 : * @param __pos2 The position in the string_view to insert from.
5119 : * @param __n2 The number of characters to insert.
5120 : * @return Reference to this string.
5121 : */
5122 : template<typename _Tp>
5123 : _If_sv<_Tp, basic_string&>
5124 : replace(size_type __pos1, size_type __n1, const _Tp& __svt,
5125 : size_type __pos2, size_type __n2 = npos)
5126 : {
5127 : __sv_type __sv = __svt;
5128 : return this->replace(__pos1, __n1,
5129 : __sv.data()
5130 : + std::__sv_check(__sv.size(), __pos2, "basic_string::replace"),
5131 : std::__sv_limit(__sv.size(), __pos2, __n2));
5132 : }
5133 :
5134 : /**
5135 : * @brief Replace range of characters with string_view.
5136 : * @param __i1 An iterator referencing the start position
5137 : to replace at.
5138 : * @param __i2 An iterator referencing the end position
5139 : for the replace.
5140 : * @param __svt The object convertible to string_view to insert from.
5141 : * @return Reference to this string.
5142 : */
5143 : template<typename _Tp>
5144 : _If_sv<_Tp, basic_string&>
5145 : replace(const_iterator __i1, const_iterator __i2, const _Tp& __svt)
5146 : {
5147 : __sv_type __sv = __svt;
5148 : return this->replace(__i1 - begin(), __i2 - __i1, __sv);
5149 : }
5150 : #endif // C++17
5151 :
5152 : private:
5153 : template<class _Integer>
5154 : basic_string&
5155 : _M_replace_dispatch(iterator __i1, iterator __i2, _Integer __n,
5156 : _Integer __val, __true_type)
5157 : { return _M_replace_aux(__i1 - _M_ibegin(), __i2 - __i1, __n, __val); }
5158 :
5159 : template<class _InputIterator>
5160 : basic_string&
5161 : _M_replace_dispatch(iterator __i1, iterator __i2, _InputIterator __k1,
5162 : _InputIterator __k2, __false_type);
5163 :
5164 : basic_string&
5165 : _M_replace_aux(size_type __pos1, size_type __n1, size_type __n2,
5166 : _CharT __c);
5167 :
5168 : basic_string&
5169 : _M_replace_safe(size_type __pos1, size_type __n1, const _CharT* __s,
5170 : size_type __n2);
5171 :
5172 : // _S_construct_aux is used to implement the 21.3.1 para 15 which
5173 : // requires special behaviour if _InIter is an integral type
5174 : template<class _InIterator>
5175 : static _CharT*
5176 : _S_construct_aux(_InIterator __beg, _InIterator __end,
5177 : const _Alloc& __a, __false_type)
5178 : {
5179 : typedef typename iterator_traits<_InIterator>::iterator_category _Tag;
5180 : return _S_construct(__beg, __end, __a, _Tag());
5181 : }
5182 :
5183 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
5184 : // 438. Ambiguity in the "do the right thing" clause
5185 : template<class _Integer>
5186 : static _CharT*
5187 : _S_construct_aux(_Integer __beg, _Integer __end,
5188 : const _Alloc& __a, __true_type)
5189 : { return _S_construct_aux_2(static_cast<size_type>(__beg),
5190 : __end, __a); }
5191 :
5192 : static _CharT*
5193 : _S_construct_aux_2(size_type __req, _CharT __c, const _Alloc& __a)
5194 : { return _S_construct(__req, __c, __a); }
5195 :
5196 : template<class _InIterator>
5197 : static _CharT*
5198 : _S_construct(_InIterator __beg, _InIterator __end, const _Alloc& __a)
5199 : {
5200 : typedef typename std::__is_integer<_InIterator>::__type _Integral;
5201 : return _S_construct_aux(__beg, __end, __a, _Integral());
5202 : }
5203 :
5204 : // For Input Iterators, used in istreambuf_iterators, etc.
5205 : template<class _InIterator>
5206 : static _CharT*
5207 : _S_construct(_InIterator __beg, _InIterator __end, const _Alloc& __a,
5208 : input_iterator_tag);
5209 :
5210 : // For forward_iterators up to random_access_iterators, used for
5211 : // string::iterator, _CharT*, etc.
5212 : template<class _FwdIterator>
5213 : static _CharT*
5214 : _S_construct(_FwdIterator __beg, _FwdIterator __end, const _Alloc& __a,
5215 : forward_iterator_tag);
5216 :
5217 : static _CharT*
5218 : _S_construct(size_type __req, _CharT __c, const _Alloc& __a);
5219 :
5220 : public:
5221 :
5222 : /**
5223 : * @brief Copy substring into C string.
5224 : * @param __s C string to copy value into.
5225 : * @param __n Number of characters to copy.
5226 : * @param __pos Index of first character to copy.
5227 : * @return Number of characters actually copied
5228 : * @throw std::out_of_range If __pos > size().
5229 : *
5230 : * Copies up to @a __n characters starting at @a __pos into the
5231 : * C string @a __s. If @a __pos is %greater than size(),
5232 : * out_of_range is thrown.
5233 : */
5234 : size_type
5235 : copy(_CharT* __s, size_type __n, size_type __pos = 0) const;
5236 :
5237 : /**
5238 : * @brief Swap contents with another string.
5239 : * @param __s String to swap with.
5240 : *
5241 : * Exchanges the contents of this string with that of @a __s in constant
5242 : * time.
5243 : */
5244 : void
5245 : swap(basic_string& __s)
5246 : _GLIBCXX_NOEXCEPT_IF(allocator_traits<_Alloc>::is_always_equal::value);
5247 :
5248 : // String operations:
5249 : /**
5250 : * @brief Return const pointer to null-terminated contents.
5251 : *
5252 : * This is a handle to internal data. Do not modify or dire things may
5253 : * happen.
5254 : */
5255 : const _CharT*
5256 : c_str() const _GLIBCXX_NOEXCEPT
5257 : { return _M_data(); }
5258 :
5259 : /**
5260 : * @brief Return const pointer to contents.
5261 : *
5262 : * This is a pointer to internal data. It is undefined to modify
5263 : * the contents through the returned pointer. To get a pointer that
5264 : * allows modifying the contents use @c &str[0] instead,
5265 : * (or in C++17 the non-const @c str.data() overload).
5266 : */
5267 : const _CharT*
5268 : data() const _GLIBCXX_NOEXCEPT
5269 : { return _M_data(); }
5270 :
5271 : #if __cplusplus >= 201703L
5272 : /**
5273 : * @brief Return non-const pointer to contents.
5274 : *
5275 : * This is a pointer to the character sequence held by the string.
5276 : * Modifying the characters in the sequence is allowed.
5277 : */
5278 : _CharT*
5279 : data() noexcept
5280 : {
5281 : _M_leak();
5282 : return _M_data();
5283 : }
5284 : #endif
5285 :
5286 : /**
5287 : * @brief Return copy of allocator used to construct this string.
5288 : */
5289 : allocator_type
5290 : get_allocator() const _GLIBCXX_NOEXCEPT
5291 : { return _M_dataplus; }
5292 :
5293 : /**
5294 : * @brief Find position of a C substring.
5295 : * @param __s C string to locate.
5296 : * @param __pos Index of character to search from.
5297 : * @param __n Number of characters from @a s to search for.
5298 : * @return Index of start of first occurrence.
5299 : *
5300 : * Starting from @a __pos, searches forward for the first @a
5301 : * __n characters in @a __s within this string. If found,
5302 : * returns the index where it begins. If not found, returns
5303 : * npos.
5304 : */
5305 : size_type
5306 : find(const _CharT* __s, size_type __pos, size_type __n) const
5307 : _GLIBCXX_NOEXCEPT;
5308 :
5309 : /**
5310 : * @brief Find position of a string.
5311 : * @param __str String to locate.
5312 : * @param __pos Index of character to search from (default 0).
5313 : * @return Index of start of first occurrence.
5314 : *
5315 : * Starting from @a __pos, searches forward for value of @a __str within
5316 : * this string. If found, returns the index where it begins. If not
5317 : * found, returns npos.
5318 : */
5319 : size_type
5320 : find(const basic_string& __str, size_type __pos = 0) const
5321 : _GLIBCXX_NOEXCEPT
5322 : { return this->find(__str.data(), __pos, __str.size()); }
5323 :
5324 : /**
5325 : * @brief Find position of a C string.
5326 : * @param __s C string to locate.
5327 : * @param __pos Index of character to search from (default 0).
5328 : * @return Index of start of first occurrence.
5329 : *
5330 : * Starting from @a __pos, searches forward for the value of @a
5331 : * __s within this string. If found, returns the index where
5332 : * it begins. If not found, returns npos.
5333 : */
5334 : size_type
5335 : find(const _CharT* __s, size_type __pos = 0) const _GLIBCXX_NOEXCEPT
5336 : {
5337 : __glibcxx_requires_string(__s);
5338 : return this->find(__s, __pos, traits_type::length(__s));
5339 : }
5340 :
5341 : /**
5342 : * @brief Find position of a character.
5343 : * @param __c Character to locate.
5344 : * @param __pos Index of character to search from (default 0).
5345 : * @return Index of first occurrence.
5346 : *
5347 : * Starting from @a __pos, searches forward for @a __c within
5348 : * this string. If found, returns the index where it was
5349 : * found. If not found, returns npos.
5350 : */
5351 : size_type
5352 : find(_CharT __c, size_type __pos = 0) const _GLIBCXX_NOEXCEPT;
5353 :
5354 : #if __cplusplus >= 201703L
5355 : /**
5356 : * @brief Find position of a string_view.
5357 : * @param __svt The object convertible to string_view to locate.
5358 : * @param __pos Index of character to search from (default 0).
5359 : * @return Index of start of first occurrence.
5360 : */
5361 : template<typename _Tp>
5362 : _If_sv<_Tp, size_type>
5363 : find(const _Tp& __svt, size_type __pos = 0) const
5364 : noexcept(is_same<_Tp, __sv_type>::value)
5365 : {
5366 : __sv_type __sv = __svt;
5367 : return this->find(__sv.data(), __pos, __sv.size());
5368 : }
5369 : #endif // C++17
5370 :
5371 : /**
5372 : * @brief Find last position of a string.
5373 : * @param __str String to locate.
5374 : * @param __pos Index of character to search back from (default end).
5375 : * @return Index of start of last occurrence.
5376 : *
5377 : * Starting from @a __pos, searches backward for value of @a
5378 : * __str within this string. If found, returns the index where
5379 : * it begins. If not found, returns npos.
5380 : */
5381 : size_type
5382 : rfind(const basic_string& __str, size_type __pos = npos) const
5383 : _GLIBCXX_NOEXCEPT
5384 : { return this->rfind(__str.data(), __pos, __str.size()); }
5385 :
5386 : /**
5387 : * @brief Find last position of a C substring.
5388 : * @param __s C string to locate.
5389 : * @param __pos Index of character to search back from.
5390 : * @param __n Number of characters from s to search for.
5391 : * @return Index of start of last occurrence.
5392 : *
5393 : * Starting from @a __pos, searches backward for the first @a
5394 : * __n characters in @a __s within this string. If found,
5395 : * returns the index where it begins. If not found, returns
5396 : * npos.
5397 : */
5398 : size_type
5399 : rfind(const _CharT* __s, size_type __pos, size_type __n) const
5400 : _GLIBCXX_NOEXCEPT;
5401 :
5402 : /**
5403 : * @brief Find last position of a C string.
5404 : * @param __s C string to locate.
5405 : * @param __pos Index of character to start search at (default end).
5406 : * @return Index of start of last occurrence.
5407 : *
5408 : * Starting from @a __pos, searches backward for the value of
5409 : * @a __s within this string. If found, returns the index
5410 : * where it begins. If not found, returns npos.
5411 : */
5412 : size_type
5413 : rfind(const _CharT* __s, size_type __pos = npos) const _GLIBCXX_NOEXCEPT
5414 : {
5415 : __glibcxx_requires_string(__s);
5416 : return this->rfind(__s, __pos, traits_type::length(__s));
5417 : }
5418 :
5419 : /**
5420 : * @brief Find last position of a character.
5421 : * @param __c Character to locate.
5422 : * @param __pos Index of character to search back from (default end).
5423 : * @return Index of last occurrence.
5424 : *
5425 : * Starting from @a __pos, searches backward for @a __c within
5426 : * this string. If found, returns the index where it was
5427 : * found. If not found, returns npos.
5428 : */
5429 : size_type
5430 : rfind(_CharT __c, size_type __pos = npos) const _GLIBCXX_NOEXCEPT;
5431 :
5432 : #if __cplusplus >= 201703L
5433 : /**
5434 : * @brief Find last position of a string_view.
5435 : * @param __svt The object convertible to string_view to locate.
5436 : * @param __pos Index of character to search back from (default end).
5437 : * @return Index of start of last occurrence.
5438 : */
5439 : template<typename _Tp>
5440 : _If_sv<_Tp, size_type>
5441 : rfind(const _Tp& __svt, size_type __pos = npos) const
5442 : noexcept(is_same<_Tp, __sv_type>::value)
5443 : {
5444 : __sv_type __sv = __svt;
5445 : return this->rfind(__sv.data(), __pos, __sv.size());
5446 : }
5447 : #endif // C++17
5448 :
5449 : /**
5450 : * @brief Find position of a character of string.
5451 : * @param __str String containing characters to locate.
5452 : * @param __pos Index of character to search from (default 0).
5453 : * @return Index of first occurrence.
5454 : *
5455 : * Starting from @a __pos, searches forward for one of the
5456 : * characters of @a __str within this string. If found,
5457 : * returns the index where it was found. If not found, returns
5458 : * npos.
5459 : */
5460 : size_type
5461 : find_first_of(const basic_string& __str, size_type __pos = 0) const
5462 : _GLIBCXX_NOEXCEPT
5463 : { return this->find_first_of(__str.data(), __pos, __str.size()); }
5464 :
5465 : /**
5466 : * @brief Find position of a character of C substring.
5467 : * @param __s String containing characters to locate.
5468 : * @param __pos Index of character to search from.
5469 : * @param __n Number of characters from s to search for.
5470 : * @return Index of first occurrence.
5471 : *
5472 : * Starting from @a __pos, searches forward for one of the
5473 : * first @a __n characters of @a __s within this string. If
5474 : * found, returns the index where it was found. If not found,
5475 : * returns npos.
5476 : */
5477 : size_type
5478 : find_first_of(const _CharT* __s, size_type __pos, size_type __n) const
5479 : _GLIBCXX_NOEXCEPT;
5480 :
5481 : /**
5482 : * @brief Find position of a character of C string.
5483 : * @param __s String containing characters to locate.
5484 : * @param __pos Index of character to search from (default 0).
5485 : * @return Index of first occurrence.
5486 : *
5487 : * Starting from @a __pos, searches forward for one of the
5488 : * characters of @a __s within this string. If found, returns
5489 : * the index where it was found. If not found, returns npos.
5490 : */
5491 : size_type
5492 : find_first_of(const _CharT* __s, size_type __pos = 0) const
5493 : _GLIBCXX_NOEXCEPT
5494 : {
5495 : __glibcxx_requires_string(__s);
5496 : return this->find_first_of(__s, __pos, traits_type::length(__s));
5497 : }
5498 :
5499 : /**
5500 : * @brief Find position of a character.
5501 : * @param __c Character to locate.
5502 : * @param __pos Index of character to search from (default 0).
5503 : * @return Index of first occurrence.
5504 : *
5505 : * Starting from @a __pos, searches forward for the character
5506 : * @a __c within this string. If found, returns the index
5507 : * where it was found. If not found, returns npos.
5508 : *
5509 : * Note: equivalent to find(__c, __pos).
5510 : */
5511 : size_type
5512 : find_first_of(_CharT __c, size_type __pos = 0) const _GLIBCXX_NOEXCEPT
5513 : { return this->find(__c, __pos); }
5514 :
5515 : #if __cplusplus >= 201703L
5516 : /**
5517 : * @brief Find position of a character of a string_view.
5518 : * @param __svt An object convertible to string_view containing
5519 : * characters to locate.
5520 : * @param __pos Index of character to search from (default 0).
5521 : * @return Index of first occurrence.
5522 : */
5523 : template<typename _Tp>
5524 : _If_sv<_Tp, size_type>
5525 : find_first_of(const _Tp& __svt, size_type __pos = 0) const
5526 : noexcept(is_same<_Tp, __sv_type>::value)
5527 : {
5528 : __sv_type __sv = __svt;
5529 : return this->find_first_of(__sv.data(), __pos, __sv.size());
5530 : }
5531 : #endif // C++17
5532 :
5533 : /**
5534 : * @brief Find last position of a character of string.
5535 : * @param __str String containing characters to locate.
5536 : * @param __pos Index of character to search back from (default end).
5537 : * @return Index of last occurrence.
5538 : *
5539 : * Starting from @a __pos, searches backward for one of the
5540 : * characters of @a __str within this string. If found,
5541 : * returns the index where it was found. If not found, returns
5542 : * npos.
5543 : */
5544 : size_type
5545 : find_last_of(const basic_string& __str, size_type __pos = npos) const
5546 : _GLIBCXX_NOEXCEPT
5547 : { return this->find_last_of(__str.data(), __pos, __str.size()); }
5548 :
5549 : /**
5550 : * @brief Find last position of a character of C substring.
5551 : * @param __s C string containing characters to locate.
5552 : * @param __pos Index of character to search back from.
5553 : * @param __n Number of characters from s to search for.
5554 : * @return Index of last occurrence.
5555 : *
5556 : * Starting from @a __pos, searches backward for one of the
5557 : * first @a __n characters of @a __s within this string. If
5558 : * found, returns the index where it was found. If not found,
5559 : * returns npos.
5560 : */
5561 : size_type
5562 : find_last_of(const _CharT* __s, size_type __pos, size_type __n) const
5563 : _GLIBCXX_NOEXCEPT;
5564 :
5565 : /**
5566 : * @brief Find last position of a character of C string.
5567 : * @param __s C string containing characters to locate.
5568 : * @param __pos Index of character to search back from (default end).
5569 : * @return Index of last occurrence.
5570 : *
5571 : * Starting from @a __pos, searches backward for one of the
5572 : * characters of @a __s within this string. If found, returns
5573 : * the index where it was found. If not found, returns npos.
5574 : */
5575 : size_type
5576 : find_last_of(const _CharT* __s, size_type __pos = npos) const
5577 : _GLIBCXX_NOEXCEPT
5578 : {
5579 : __glibcxx_requires_string(__s);
5580 : return this->find_last_of(__s, __pos, traits_type::length(__s));
5581 : }
5582 :
5583 : /**
5584 : * @brief Find last position of a character.
5585 : * @param __c Character to locate.
5586 : * @param __pos Index of character to search back from (default end).
5587 : * @return Index of last occurrence.
5588 : *
5589 : * Starting from @a __pos, searches backward for @a __c within
5590 : * this string. If found, returns the index where it was
5591 : * found. If not found, returns npos.
5592 : *
5593 : * Note: equivalent to rfind(__c, __pos).
5594 : */
5595 : size_type
5596 : find_last_of(_CharT __c, size_type __pos = npos) const _GLIBCXX_NOEXCEPT
5597 : { return this->rfind(__c, __pos); }
5598 :
5599 : #if __cplusplus >= 201703L
5600 : /**
5601 : * @brief Find last position of a character of string.
5602 : * @param __svt An object convertible to string_view containing
5603 : * characters to locate.
5604 : * @param __pos Index of character to search back from (default end).
5605 : * @return Index of last occurrence.
5606 : */
5607 : template<typename _Tp>
5608 : _If_sv<_Tp, size_type>
5609 : find_last_of(const _Tp& __svt, size_type __pos = npos) const
5610 : noexcept(is_same<_Tp, __sv_type>::value)
5611 : {
5612 : __sv_type __sv = __svt;
5613 : return this->find_last_of(__sv.data(), __pos, __sv.size());
5614 : }
5615 : #endif // C++17
5616 :
5617 : /**
5618 : * @brief Find position of a character not in string.
5619 : * @param __str String containing characters to avoid.
5620 : * @param __pos Index of character to search from (default 0).
5621 : * @return Index of first occurrence.
5622 : *
5623 : * Starting from @a __pos, searches forward for a character not contained
5624 : * in @a __str within this string. If found, returns the index where it
5625 : * was found. If not found, returns npos.
5626 : */
5627 : size_type
5628 : find_first_not_of(const basic_string& __str, size_type __pos = 0) const
5629 : _GLIBCXX_NOEXCEPT
5630 : { return this->find_first_not_of(__str.data(), __pos, __str.size()); }
5631 :
5632 : /**
5633 : * @brief Find position of a character not in C substring.
5634 : * @param __s C string containing characters to avoid.
5635 : * @param __pos Index of character to search from.
5636 : * @param __n Number of characters from __s to consider.
5637 : * @return Index of first occurrence.
5638 : *
5639 : * Starting from @a __pos, searches forward for a character not
5640 : * contained in the first @a __n characters of @a __s within
5641 : * this string. If found, returns the index where it was
5642 : * found. If not found, returns npos.
5643 : */
5644 : size_type
5645 : find_first_not_of(const _CharT* __s, size_type __pos,
5646 : size_type __n) const _GLIBCXX_NOEXCEPT;
5647 :
5648 : /**
5649 : * @brief Find position of a character not in C string.
5650 : * @param __s C string containing characters to avoid.
5651 : * @param __pos Index of character to search from (default 0).
5652 : * @return Index of first occurrence.
5653 : *
5654 : * Starting from @a __pos, searches forward for a character not
5655 : * contained in @a __s within this string. If found, returns
5656 : * the index where it was found. If not found, returns npos.
5657 : */
5658 : size_type
5659 : find_first_not_of(const _CharT* __s, size_type __pos = 0) const
5660 : _GLIBCXX_NOEXCEPT
5661 : {
5662 : __glibcxx_requires_string(__s);
5663 : return this->find_first_not_of(__s, __pos, traits_type::length(__s));
5664 : }
5665 :
5666 : /**
5667 : * @brief Find position of a different character.
5668 : * @param __c Character to avoid.
5669 : * @param __pos Index of character to search from (default 0).
5670 : * @return Index of first occurrence.
5671 : *
5672 : * Starting from @a __pos, searches forward for a character
5673 : * other than @a __c within this string. If found, returns the
5674 : * index where it was found. If not found, returns npos.
5675 : */
5676 : size_type
5677 : find_first_not_of(_CharT __c, size_type __pos = 0) const
5678 : _GLIBCXX_NOEXCEPT;
5679 :
5680 : #if __cplusplus >= 201703L
5681 : /**
5682 : * @brief Find position of a character not in a string_view.
5683 : * @param __svt An object convertible to string_view containing
5684 : * characters to avoid.
5685 : * @param __pos Index of character to search from (default 0).
5686 : * @return Index of first occurrence.
5687 : */
5688 : template<typename _Tp>
5689 : _If_sv<_Tp, size_type>
5690 : find_first_not_of(const _Tp& __svt, size_type __pos = 0) const
5691 : noexcept(is_same<_Tp, __sv_type>::value)
5692 : {
5693 : __sv_type __sv = __svt;
5694 : return this->find_first_not_of(__sv.data(), __pos, __sv.size());
5695 : }
5696 : #endif // C++17
5697 :
5698 : /**
5699 : * @brief Find last position of a character not in string.
5700 : * @param __str String containing characters to avoid.
5701 : * @param __pos Index of character to search back from (default end).
5702 : * @return Index of last occurrence.
5703 : *
5704 : * Starting from @a __pos, searches backward for a character
5705 : * not contained in @a __str within this string. If found,
5706 : * returns the index where it was found. If not found, returns
5707 : * npos.
5708 : */
5709 : size_type
5710 : find_last_not_of(const basic_string& __str, size_type __pos = npos) const
5711 : _GLIBCXX_NOEXCEPT
5712 : { return this->find_last_not_of(__str.data(), __pos, __str.size()); }
5713 :
5714 : /**
5715 : * @brief Find last position of a character not in C substring.
5716 : * @param __s C string containing characters to avoid.
5717 : * @param __pos Index of character to search back from.
5718 : * @param __n Number of characters from s to consider.
5719 : * @return Index of last occurrence.
5720 : *
5721 : * Starting from @a __pos, searches backward for a character not
5722 : * contained in the first @a __n characters of @a __s within this string.
5723 : * If found, returns the index where it was found. If not found,
5724 : * returns npos.
5725 : */
5726 : size_type
5727 : find_last_not_of(const _CharT* __s, size_type __pos,
5728 : size_type __n) const _GLIBCXX_NOEXCEPT;
5729 : /**
5730 : * @brief Find last position of a character not in C string.
5731 : * @param __s C string containing characters to avoid.
5732 : * @param __pos Index of character to search back from (default end).
5733 : * @return Index of last occurrence.
5734 : *
5735 : * Starting from @a __pos, searches backward for a character
5736 : * not contained in @a __s within this string. If found,
5737 : * returns the index where it was found. If not found, returns
5738 : * npos.
5739 : */
5740 : size_type
5741 : find_last_not_of(const _CharT* __s, size_type __pos = npos) const
5742 : _GLIBCXX_NOEXCEPT
5743 : {
5744 : __glibcxx_requires_string(__s);
5745 : return this->find_last_not_of(__s, __pos, traits_type::length(__s));
5746 : }
5747 :
5748 : /**
5749 : * @brief Find last position of a different character.
5750 : * @param __c Character to avoid.
5751 : * @param __pos Index of character to search back from (default end).
5752 : * @return Index of last occurrence.
5753 : *
5754 : * Starting from @a __pos, searches backward for a character other than
5755 : * @a __c within this string. If found, returns the index where it was
5756 : * found. If not found, returns npos.
5757 : */
5758 : size_type
5759 : find_last_not_of(_CharT __c, size_type __pos = npos) const
5760 : _GLIBCXX_NOEXCEPT;
5761 :
5762 : #if __cplusplus >= 201703L
5763 : /**
5764 : * @brief Find last position of a character not in a string_view.
5765 : * @param __svt An object convertible to string_view containing
5766 : * characters to avoid.
5767 : * @param __pos Index of character to search back from (default end).
5768 : * @return Index of last occurrence.
5769 : */
5770 : template<typename _Tp>
5771 : _If_sv<_Tp, size_type>
5772 : find_last_not_of(const _Tp& __svt, size_type __pos = npos) const
5773 : noexcept(is_same<_Tp, __sv_type>::value)
5774 : {
5775 : __sv_type __sv = __svt;
5776 : return this->find_last_not_of(__sv.data(), __pos, __sv.size());
5777 : }
5778 : #endif // C++17
5779 :
5780 : /**
5781 : * @brief Get a substring.
5782 : * @param __pos Index of first character (default 0).
5783 : * @param __n Number of characters in substring (default remainder).
5784 : * @return The new string.
5785 : * @throw std::out_of_range If __pos > size().
5786 : *
5787 : * Construct and return a new string using the @a __n
5788 : * characters starting at @a __pos. If the string is too
5789 : * short, use the remainder of the characters. If @a __pos is
5790 : * beyond the end of the string, out_of_range is thrown.
5791 : */
5792 : basic_string
5793 : substr(size_type __pos = 0, size_type __n = npos) const
5794 : { return basic_string(*this,
5795 : _M_check(__pos, "basic_string::substr"), __n); }
5796 :
5797 : /**
5798 : * @brief Compare to a string.
5799 : * @param __str String to compare against.
5800 : * @return Integer < 0, 0, or > 0.
5801 : *
5802 : * Returns an integer < 0 if this string is ordered before @a
5803 : * __str, 0 if their values are equivalent, or > 0 if this
5804 : * string is ordered after @a __str. Determines the effective
5805 : * length rlen of the strings to compare as the smallest of
5806 : * size() and str.size(). The function then compares the two
5807 : * strings by calling traits::compare(data(), str.data(),rlen).
5808 : * If the result of the comparison is nonzero returns it,
5809 : * otherwise the shorter one is ordered first.
5810 : */
5811 : int
5812 : compare(const basic_string& __str) const
5813 : {
5814 : const size_type __size = this->size();
5815 : const size_type __osize = __str.size();
5816 : const size_type __len = std::min(__size, __osize);
5817 :
5818 : int __r = traits_type::compare(_M_data(), __str.data(), __len);
5819 : if (!__r)
5820 : __r = _S_compare(__size, __osize);
5821 : return __r;
5822 : }
5823 :
5824 : #if __cplusplus >= 201703L
5825 : /**
5826 : * @brief Compare to a string_view.
5827 : * @param __svt An object convertible to string_view to compare against.
5828 : * @return Integer < 0, 0, or > 0.
5829 : */
5830 : template<typename _Tp>
5831 : _If_sv<_Tp, int>
5832 : compare(const _Tp& __svt) const
5833 : noexcept(is_same<_Tp, __sv_type>::value)
5834 : {
5835 : __sv_type __sv = __svt;
5836 : const size_type __size = this->size();
5837 : const size_type __osize = __sv.size();
5838 : const size_type __len = std::min(__size, __osize);
5839 :
5840 : int __r = traits_type::compare(_M_data(), __sv.data(), __len);
5841 : if (!__r)
5842 : __r = _S_compare(__size, __osize);
5843 : return __r;
5844 : }
5845 :
5846 : /**
5847 : * @brief Compare to a string_view.
5848 : * @param __pos A position in the string to start comparing from.
5849 : * @param __n The number of characters to compare.
5850 : * @param __svt An object convertible to string_view to compare
5851 : * against.
5852 : * @return Integer < 0, 0, or > 0.
5853 : */
5854 : template<typename _Tp>
5855 : _If_sv<_Tp, int>
5856 : compare(size_type __pos, size_type __n, const _Tp& __svt) const
5857 : noexcept(is_same<_Tp, __sv_type>::value)
5858 : {
5859 : __sv_type __sv = __svt;
5860 : return __sv_type(*this).substr(__pos, __n).compare(__sv);
5861 : }
5862 :
5863 : /**
5864 : * @brief Compare to a string_view.
5865 : * @param __pos1 A position in the string to start comparing from.
5866 : * @param __n1 The number of characters to compare.
5867 : * @param __svt An object convertible to string_view to compare
5868 : * against.
5869 : * @param __pos2 A position in the string_view to start comparing from.
5870 : * @param __n2 The number of characters to compare.
5871 : * @return Integer < 0, 0, or > 0.
5872 : */
5873 : template<typename _Tp>
5874 : _If_sv<_Tp, int>
5875 : compare(size_type __pos1, size_type __n1, const _Tp& __svt,
5876 : size_type __pos2, size_type __n2 = npos) const
5877 : noexcept(is_same<_Tp, __sv_type>::value)
5878 : {
5879 : __sv_type __sv = __svt;
5880 : return __sv_type(*this)
5881 : .substr(__pos1, __n1).compare(__sv.substr(__pos2, __n2));
5882 : }
5883 : #endif // C++17
5884 :
5885 : /**
5886 : * @brief Compare substring to a string.
5887 : * @param __pos Index of first character of substring.
5888 : * @param __n Number of characters in substring.
5889 : * @param __str String to compare against.
5890 : * @return Integer < 0, 0, or > 0.
5891 : *
5892 : * Form the substring of this string from the @a __n characters
5893 : * starting at @a __pos. Returns an integer < 0 if the
5894 : * substring is ordered before @a __str, 0 if their values are
5895 : * equivalent, or > 0 if the substring is ordered after @a
5896 : * __str. Determines the effective length rlen of the strings
5897 : * to compare as the smallest of the length of the substring
5898 : * and @a __str.size(). The function then compares the two
5899 : * strings by calling
5900 : * traits::compare(substring.data(),str.data(),rlen). If the
5901 : * result of the comparison is nonzero returns it, otherwise
5902 : * the shorter one is ordered first.
5903 : */
5904 : int
5905 : compare(size_type __pos, size_type __n, const basic_string& __str) const;
5906 :
5907 : /**
5908 : * @brief Compare substring to a substring.
5909 : * @param __pos1 Index of first character of substring.
5910 : * @param __n1 Number of characters in substring.
5911 : * @param __str String to compare against.
5912 : * @param __pos2 Index of first character of substring of str.
5913 : * @param __n2 Number of characters in substring of str.
5914 : * @return Integer < 0, 0, or > 0.
5915 : *
5916 : * Form the substring of this string from the @a __n1
5917 : * characters starting at @a __pos1. Form the substring of @a
5918 : * __str from the @a __n2 characters starting at @a __pos2.
5919 : * Returns an integer < 0 if this substring is ordered before
5920 : * the substring of @a __str, 0 if their values are equivalent,
5921 : * or > 0 if this substring is ordered after the substring of
5922 : * @a __str. Determines the effective length rlen of the
5923 : * strings to compare as the smallest of the lengths of the
5924 : * substrings. The function then compares the two strings by
5925 : * calling
5926 : * traits::compare(substring.data(),str.substr(pos2,n2).data(),rlen).
5927 : * If the result of the comparison is nonzero returns it,
5928 : * otherwise the shorter one is ordered first.
5929 : */
5930 : int
5931 : compare(size_type __pos1, size_type __n1, const basic_string& __str,
5932 : size_type __pos2, size_type __n2 = npos) const;
5933 :
5934 : /**
5935 : * @brief Compare to a C string.
5936 : * @param __s C string to compare against.
5937 : * @return Integer < 0, 0, or > 0.
5938 : *
5939 : * Returns an integer < 0 if this string is ordered before @a __s, 0 if
5940 : * their values are equivalent, or > 0 if this string is ordered after
5941 : * @a __s. Determines the effective length rlen of the strings to
5942 : * compare as the smallest of size() and the length of a string
5943 : * constructed from @a __s. The function then compares the two strings
5944 : * by calling traits::compare(data(),s,rlen). If the result of the
5945 : * comparison is nonzero returns it, otherwise the shorter one is
5946 : * ordered first.
5947 : */
5948 : int
5949 : compare(const _CharT* __s) const _GLIBCXX_NOEXCEPT;
5950 :
5951 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
5952 : // 5 String::compare specification questionable
5953 : /**
5954 : * @brief Compare substring to a C string.
5955 : * @param __pos Index of first character of substring.
5956 : * @param __n1 Number of characters in substring.
5957 : * @param __s C string to compare against.
5958 : * @return Integer < 0, 0, or > 0.
5959 : *
5960 : * Form the substring of this string from the @a __n1
5961 : * characters starting at @a pos. Returns an integer < 0 if
5962 : * the substring is ordered before @a __s, 0 if their values
5963 : * are equivalent, or > 0 if the substring is ordered after @a
5964 : * __s. Determines the effective length rlen of the strings to
5965 : * compare as the smallest of the length of the substring and
5966 : * the length of a string constructed from @a __s. The
5967 : * function then compares the two string by calling
5968 : * traits::compare(substring.data(),__s,rlen). If the result of
5969 : * the comparison is nonzero returns it, otherwise the shorter
5970 : * one is ordered first.
5971 : */
5972 : int
5973 : compare(size_type __pos, size_type __n1, const _CharT* __s) const;
5974 :
5975 : /**
5976 : * @brief Compare substring against a character %array.
5977 : * @param __pos Index of first character of substring.
5978 : * @param __n1 Number of characters in substring.
5979 : * @param __s character %array to compare against.
5980 : * @param __n2 Number of characters of s.
5981 : * @return Integer < 0, 0, or > 0.
5982 : *
5983 : * Form the substring of this string from the @a __n1
5984 : * characters starting at @a __pos. Form a string from the
5985 : * first @a __n2 characters of @a __s. Returns an integer < 0
5986 : * if this substring is ordered before the string from @a __s,
5987 : * 0 if their values are equivalent, or > 0 if this substring
5988 : * is ordered after the string from @a __s. Determines the
5989 : * effective length rlen of the strings to compare as the
5990 : * smallest of the length of the substring and @a __n2. The
5991 : * function then compares the two strings by calling
5992 : * traits::compare(substring.data(),s,rlen). If the result of
5993 : * the comparison is nonzero returns it, otherwise the shorter
5994 : * one is ordered first.
5995 : *
5996 : * NB: s must have at least n2 characters, '\\0' has
5997 : * no special meaning.
5998 : */
5999 : int
6000 : compare(size_type __pos, size_type __n1, const _CharT* __s,
6001 : size_type __n2) const;
6002 :
6003 : #if __cplusplus > 201703L
6004 : bool
6005 : starts_with(basic_string_view<_CharT, _Traits> __x) const noexcept
6006 : { return __sv_type(this->data(), this->size()).starts_with(__x); }
6007 :
6008 : bool
6009 : starts_with(_CharT __x) const noexcept
6010 : { return __sv_type(this->data(), this->size()).starts_with(__x); }
6011 :
6012 : bool
6013 : starts_with(const _CharT* __x) const noexcept
6014 : { return __sv_type(this->data(), this->size()).starts_with(__x); }
6015 :
6016 : bool
6017 : ends_with(basic_string_view<_CharT, _Traits> __x) const noexcept
6018 : { return __sv_type(this->data(), this->size()).ends_with(__x); }
6019 :
6020 : bool
6021 : ends_with(_CharT __x) const noexcept
6022 : { return __sv_type(this->data(), this->size()).ends_with(__x); }
6023 :
6024 : bool
6025 : ends_with(const _CharT* __x) const noexcept
6026 : { return __sv_type(this->data(), this->size()).ends_with(__x); }
6027 : #endif // C++20
6028 :
6029 : #if __cplusplus > 202011L
6030 : bool
6031 : contains(basic_string_view<_CharT, _Traits> __x) const noexcept
6032 : { return __sv_type(this->data(), this->size()).contains(__x); }
6033 :
6034 : bool
6035 : contains(_CharT __x) const noexcept
6036 : { return __sv_type(this->data(), this->size()).contains(__x); }
6037 :
6038 : bool
6039 : contains(const _CharT* __x) const noexcept
6040 : { return __sv_type(this->data(), this->size()).contains(__x); }
6041 : #endif // C++23
6042 :
6043 : # ifdef _GLIBCXX_TM_TS_INTERNAL
6044 : friend void
6045 : ::_txnal_cow_string_C1_for_exceptions(void* that, const char* s,
6046 : void* exc);
6047 : friend const char*
6048 : ::_txnal_cow_string_c_str(const void *that);
6049 : friend void
6050 : ::_txnal_cow_string_D1(void *that);
6051 : friend void
6052 : ::_txnal_cow_string_D1_commit(void *that);
6053 : # endif
6054 : };
6055 : #endif // !_GLIBCXX_USE_CXX11_ABI
6056 :
6057 : #if __cpp_deduction_guides >= 201606
6058 : _GLIBCXX_BEGIN_NAMESPACE_CXX11
6059 : template<typename _InputIterator, typename _CharT
6060 : = typename iterator_traits<_InputIterator>::value_type,
6061 : typename _Allocator = allocator<_CharT>,
6062 : typename = _RequireInputIter<_InputIterator>,
6063 : typename = _RequireAllocator<_Allocator>>
6064 : basic_string(_InputIterator, _InputIterator, _Allocator = _Allocator())
6065 : -> basic_string<_CharT, char_traits<_CharT>, _Allocator>;
6066 :
6067 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
6068 : // 3075. basic_string needs deduction guides from basic_string_view
6069 : template<typename _CharT, typename _Traits,
6070 : typename _Allocator = allocator<_CharT>,
6071 : typename = _RequireAllocator<_Allocator>>
6072 : basic_string(basic_string_view<_CharT, _Traits>, const _Allocator& = _Allocator())
6073 : -> basic_string<_CharT, _Traits, _Allocator>;
6074 :
6075 : template<typename _CharT, typename _Traits,
6076 : typename _Allocator = allocator<_CharT>,
6077 : typename = _RequireAllocator<_Allocator>>
6078 : basic_string(basic_string_view<_CharT, _Traits>,
6079 : typename basic_string<_CharT, _Traits, _Allocator>::size_type,
6080 : typename basic_string<_CharT, _Traits, _Allocator>::size_type,
6081 : const _Allocator& = _Allocator())
6082 : -> basic_string<_CharT, _Traits, _Allocator>;
6083 : _GLIBCXX_END_NAMESPACE_CXX11
6084 : #endif
6085 :
6086 : // operator+
6087 : /**
6088 : * @brief Concatenate two strings.
6089 : * @param __lhs First string.
6090 : * @param __rhs Last string.
6091 : * @return New string with value of @a __lhs followed by @a __rhs.
6092 : */
6093 : template<typename _CharT, typename _Traits, typename _Alloc>
6094 : basic_string<_CharT, _Traits, _Alloc>
6095 138 : operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6096 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6097 : {
6098 138 : basic_string<_CharT, _Traits, _Alloc> __str(__lhs);
6099 138 : __str.append(__rhs);
6100 138 : return __str;
6101 0 : }
6102 :
6103 : /**
6104 : * @brief Concatenate C string and string.
6105 : * @param __lhs First string.
6106 : * @param __rhs Last string.
6107 : * @return New string with value of @a __lhs followed by @a __rhs.
6108 : */
6109 : template<typename _CharT, typename _Traits, typename _Alloc>
6110 : basic_string<_CharT,_Traits,_Alloc>
6111 : operator+(const _CharT* __lhs,
6112 : const basic_string<_CharT,_Traits,_Alloc>& __rhs);
6113 :
6114 : /**
6115 : * @brief Concatenate character and string.
6116 : * @param __lhs First string.
6117 : * @param __rhs Last string.
6118 : * @return New string with @a __lhs followed by @a __rhs.
6119 : */
6120 : template<typename _CharT, typename _Traits, typename _Alloc>
6121 : basic_string<_CharT,_Traits,_Alloc>
6122 : operator+(_CharT __lhs, const basic_string<_CharT,_Traits,_Alloc>& __rhs);
6123 :
6124 : /**
6125 : * @brief Concatenate string and C string.
6126 : * @param __lhs First string.
6127 : * @param __rhs Last string.
6128 : * @return New string with @a __lhs followed by @a __rhs.
6129 : */
6130 : template<typename _CharT, typename _Traits, typename _Alloc>
6131 : inline basic_string<_CharT, _Traits, _Alloc>
6132 4804 : operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6133 : const _CharT* __rhs)
6134 : {
6135 4804 : basic_string<_CharT, _Traits, _Alloc> __str(__lhs);
6136 4804 : __str.append(__rhs);
6137 4804 : return __str;
6138 0 : }
6139 :
6140 : /**
6141 : * @brief Concatenate string and character.
6142 : * @param __lhs First string.
6143 : * @param __rhs Last string.
6144 : * @return New string with @a __lhs followed by @a __rhs.
6145 : */
6146 : template<typename _CharT, typename _Traits, typename _Alloc>
6147 : inline basic_string<_CharT, _Traits, _Alloc>
6148 118 : operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs, _CharT __rhs)
6149 : {
6150 : typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
6151 : typedef typename __string_type::size_type __size_type;
6152 118 : __string_type __str(__lhs);
6153 118 : __str.append(__size_type(1), __rhs);
6154 118 : return __str;
6155 0 : }
6156 :
6157 : #if __cplusplus >= 201103L
6158 : template<typename _CharT, typename _Traits, typename _Alloc>
6159 : inline basic_string<_CharT, _Traits, _Alloc>
6160 97305 : operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
6161 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6162 97305 : { return std::move(__lhs.append(__rhs)); }
6163 :
6164 : template<typename _CharT, typename _Traits, typename _Alloc>
6165 : inline basic_string<_CharT, _Traits, _Alloc>
6166 457 : operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6167 : basic_string<_CharT, _Traits, _Alloc>&& __rhs)
6168 457 : { return std::move(__rhs.insert(0, __lhs)); }
6169 :
6170 : template<typename _CharT, typename _Traits, typename _Alloc>
6171 : inline basic_string<_CharT, _Traits, _Alloc>
6172 1088 : operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
6173 : basic_string<_CharT, _Traits, _Alloc>&& __rhs)
6174 : {
6175 : #if _GLIBCXX_USE_CXX11_ABI
6176 : using _Alloc_traits = allocator_traits<_Alloc>;
6177 1088 : bool __use_rhs = false;
6178 : if _GLIBCXX17_CONSTEXPR (typename _Alloc_traits::is_always_equal{})
6179 1088 : __use_rhs = true;
6180 : else if (__lhs.get_allocator() == __rhs.get_allocator())
6181 : __use_rhs = true;
6182 1088 : if (__use_rhs)
6183 : #endif
6184 : {
6185 1088 : const auto __size = __lhs.size() + __rhs.size();
6186 1088 : if (__size > __lhs.capacity() && __size <= __rhs.capacity())
6187 0 : return std::move(__rhs.insert(0, __lhs));
6188 : }
6189 1088 : return std::move(__lhs.append(__rhs));
6190 : }
6191 :
6192 : template<typename _CharT, typename _Traits, typename _Alloc>
6193 : inline basic_string<_CharT, _Traits, _Alloc>
6194 7366 : operator+(const _CharT* __lhs,
6195 : basic_string<_CharT, _Traits, _Alloc>&& __rhs)
6196 7366 : { return std::move(__rhs.insert(0, __lhs)); }
6197 :
6198 : template<typename _CharT, typename _Traits, typename _Alloc>
6199 : inline basic_string<_CharT, _Traits, _Alloc>
6200 : operator+(_CharT __lhs,
6201 : basic_string<_CharT, _Traits, _Alloc>&& __rhs)
6202 : { return std::move(__rhs.insert(0, 1, __lhs)); }
6203 :
6204 : template<typename _CharT, typename _Traits, typename _Alloc>
6205 : inline basic_string<_CharT, _Traits, _Alloc>
6206 192637 : operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
6207 : const _CharT* __rhs)
6208 192637 : { return std::move(__lhs.append(__rhs)); }
6209 :
6210 : template<typename _CharT, typename _Traits, typename _Alloc>
6211 : inline basic_string<_CharT, _Traits, _Alloc>
6212 100 : operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
6213 : _CharT __rhs)
6214 100 : { return std::move(__lhs.append(1, __rhs)); }
6215 : #endif
6216 :
6217 : // operator ==
6218 : /**
6219 : * @brief Test equivalence of two strings.
6220 : * @param __lhs First string.
6221 : * @param __rhs Second string.
6222 : * @return True if @a __lhs.compare(@a __rhs) == 0. False otherwise.
6223 : */
6224 : template<typename _CharT, typename _Traits, typename _Alloc>
6225 : inline bool
6226 : operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6227 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6228 : _GLIBCXX_NOEXCEPT
6229 : { return __lhs.compare(__rhs) == 0; }
6230 :
6231 : template<typename _CharT>
6232 : inline
6233 : typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value, bool>::__type
6234 396272 : operator==(const basic_string<_CharT>& __lhs,
6235 : const basic_string<_CharT>& __rhs) _GLIBCXX_NOEXCEPT
6236 396272 : { return (__lhs.size() == __rhs.size()
6237 396277 : && !std::char_traits<_CharT>::compare(__lhs.data(), __rhs.data(),
6238 396231 : __lhs.size())); }
6239 :
6240 : /**
6241 : * @brief Test equivalence of string and C string.
6242 : * @param __lhs String.
6243 : * @param __rhs C string.
6244 : * @return True if @a __lhs.compare(@a __rhs) == 0. False otherwise.
6245 : */
6246 : template<typename _CharT, typename _Traits, typename _Alloc>
6247 : inline bool
6248 267112 : operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6249 : const _CharT* __rhs)
6250 267112 : { return __lhs.compare(__rhs) == 0; }
6251 :
6252 : #if __cpp_lib_three_way_comparison
6253 : /**
6254 : * @brief Three-way comparison of a string and a C string.
6255 : * @param __lhs A string.
6256 : * @param __rhs A null-terminated string.
6257 : * @return A value indicating whether `__lhs` is less than, equal to,
6258 : * greater than, or incomparable with `__rhs`.
6259 : */
6260 : template<typename _CharT, typename _Traits, typename _Alloc>
6261 : inline auto
6262 : operator<=>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6263 : const basic_string<_CharT, _Traits, _Alloc>& __rhs) noexcept
6264 : -> decltype(__detail::__char_traits_cmp_cat<_Traits>(0))
6265 : { return __detail::__char_traits_cmp_cat<_Traits>(__lhs.compare(__rhs)); }
6266 :
6267 : /**
6268 : * @brief Three-way comparison of a string and a C string.
6269 : * @param __lhs A string.
6270 : * @param __rhs A null-terminated string.
6271 : * @return A value indicating whether `__lhs` is less than, equal to,
6272 : * greater than, or incomparable with `__rhs`.
6273 : */
6274 : template<typename _CharT, typename _Traits, typename _Alloc>
6275 : inline auto
6276 : operator<=>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6277 : const _CharT* __rhs) noexcept
6278 : -> decltype(__detail::__char_traits_cmp_cat<_Traits>(0))
6279 : { return __detail::__char_traits_cmp_cat<_Traits>(__lhs.compare(__rhs)); }
6280 : #else
6281 : /**
6282 : * @brief Test equivalence of C string and string.
6283 : * @param __lhs C string.
6284 : * @param __rhs String.
6285 : * @return True if @a __rhs.compare(@a __lhs) == 0. False otherwise.
6286 : */
6287 : template<typename _CharT, typename _Traits, typename _Alloc>
6288 : inline bool
6289 26527 : operator==(const _CharT* __lhs,
6290 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6291 26527 : { return __rhs.compare(__lhs) == 0; }
6292 :
6293 : // operator !=
6294 : /**
6295 : * @brief Test difference of two strings.
6296 : * @param __lhs First string.
6297 : * @param __rhs Second string.
6298 : * @return True if @a __lhs.compare(@a __rhs) != 0. False otherwise.
6299 : */
6300 : template<typename _CharT, typename _Traits, typename _Alloc>
6301 : inline bool
6302 106613 : operator!=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6303 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6304 : _GLIBCXX_NOEXCEPT
6305 106613 : { return !(__lhs == __rhs); }
6306 :
6307 : /**
6308 : * @brief Test difference of C string and string.
6309 : * @param __lhs C string.
6310 : * @param __rhs String.
6311 : * @return True if @a __rhs.compare(@a __lhs) != 0. False otherwise.
6312 : */
6313 : template<typename _CharT, typename _Traits, typename _Alloc>
6314 : inline bool
6315 2481 : operator!=(const _CharT* __lhs,
6316 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6317 2481 : { return !(__lhs == __rhs); }
6318 :
6319 : /**
6320 : * @brief Test difference of string and C string.
6321 : * @param __lhs String.
6322 : * @param __rhs C string.
6323 : * @return True if @a __lhs.compare(@a __rhs) != 0. False otherwise.
6324 : */
6325 : template<typename _CharT, typename _Traits, typename _Alloc>
6326 : inline bool
6327 47704 : operator!=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6328 : const _CharT* __rhs)
6329 47704 : { return !(__lhs == __rhs); }
6330 :
6331 : // operator <
6332 : /**
6333 : * @brief Test if string precedes string.
6334 : * @param __lhs First string.
6335 : * @param __rhs Second string.
6336 : * @return True if @a __lhs precedes @a __rhs. False otherwise.
6337 : */
6338 : template<typename _CharT, typename _Traits, typename _Alloc>
6339 : inline bool
6340 5013514 : operator<(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6341 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6342 : _GLIBCXX_NOEXCEPT
6343 5013514 : { return __lhs.compare(__rhs) < 0; }
6344 :
6345 : /**
6346 : * @brief Test if string precedes C string.
6347 : * @param __lhs String.
6348 : * @param __rhs C string.
6349 : * @return True if @a __lhs precedes @a __rhs. False otherwise.
6350 : */
6351 : template<typename _CharT, typename _Traits, typename _Alloc>
6352 : inline bool
6353 : operator<(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6354 : const _CharT* __rhs)
6355 : { return __lhs.compare(__rhs) < 0; }
6356 :
6357 : /**
6358 : * @brief Test if C string precedes string.
6359 : * @param __lhs C string.
6360 : * @param __rhs String.
6361 : * @return True if @a __lhs precedes @a __rhs. False otherwise.
6362 : */
6363 : template<typename _CharT, typename _Traits, typename _Alloc>
6364 : inline bool
6365 : operator<(const _CharT* __lhs,
6366 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6367 : { return __rhs.compare(__lhs) > 0; }
6368 :
6369 : // operator >
6370 : /**
6371 : * @brief Test if string follows string.
6372 : * @param __lhs First string.
6373 : * @param __rhs Second string.
6374 : * @return True if @a __lhs follows @a __rhs. False otherwise.
6375 : */
6376 : template<typename _CharT, typename _Traits, typename _Alloc>
6377 : inline bool
6378 0 : operator>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6379 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6380 : _GLIBCXX_NOEXCEPT
6381 0 : { return __lhs.compare(__rhs) > 0; }
6382 :
6383 : /**
6384 : * @brief Test if string follows C string.
6385 : * @param __lhs String.
6386 : * @param __rhs C string.
6387 : * @return True if @a __lhs follows @a __rhs. False otherwise.
6388 : */
6389 : template<typename _CharT, typename _Traits, typename _Alloc>
6390 : inline bool
6391 2 : operator>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6392 : const _CharT* __rhs)
6393 2 : { return __lhs.compare(__rhs) > 0; }
6394 :
6395 : /**
6396 : * @brief Test if C string follows string.
6397 : * @param __lhs C string.
6398 : * @param __rhs String.
6399 : * @return True if @a __lhs follows @a __rhs. False otherwise.
6400 : */
6401 : template<typename _CharT, typename _Traits, typename _Alloc>
6402 : inline bool
6403 : operator>(const _CharT* __lhs,
6404 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6405 : { return __rhs.compare(__lhs) < 0; }
6406 :
6407 : // operator <=
6408 : /**
6409 : * @brief Test if string doesn't follow string.
6410 : * @param __lhs First string.
6411 : * @param __rhs Second string.
6412 : * @return True if @a __lhs doesn't follow @a __rhs. False otherwise.
6413 : */
6414 : template<typename _CharT, typename _Traits, typename _Alloc>
6415 : inline bool
6416 0 : operator<=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6417 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6418 : _GLIBCXX_NOEXCEPT
6419 0 : { return __lhs.compare(__rhs) <= 0; }
6420 :
6421 : /**
6422 : * @brief Test if string doesn't follow C string.
6423 : * @param __lhs String.
6424 : * @param __rhs C string.
6425 : * @return True if @a __lhs doesn't follow @a __rhs. False otherwise.
6426 : */
6427 : template<typename _CharT, typename _Traits, typename _Alloc>
6428 : inline bool
6429 : operator<=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6430 : const _CharT* __rhs)
6431 : { return __lhs.compare(__rhs) <= 0; }
6432 :
6433 : /**
6434 : * @brief Test if C string doesn't follow string.
6435 : * @param __lhs C string.
6436 : * @param __rhs String.
6437 : * @return True if @a __lhs doesn't follow @a __rhs. False otherwise.
6438 : */
6439 : template<typename _CharT, typename _Traits, typename _Alloc>
6440 : inline bool
6441 : operator<=(const _CharT* __lhs,
6442 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6443 : { return __rhs.compare(__lhs) >= 0; }
6444 :
6445 : // operator >=
6446 : /**
6447 : * @brief Test if string doesn't precede string.
6448 : * @param __lhs First string.
6449 : * @param __rhs Second string.
6450 : * @return True if @a __lhs doesn't precede @a __rhs. False otherwise.
6451 : */
6452 : template<typename _CharT, typename _Traits, typename _Alloc>
6453 : inline bool
6454 : operator>=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6455 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6456 : _GLIBCXX_NOEXCEPT
6457 : { return __lhs.compare(__rhs) >= 0; }
6458 :
6459 : /**
6460 : * @brief Test if string doesn't precede C string.
6461 : * @param __lhs String.
6462 : * @param __rhs C string.
6463 : * @return True if @a __lhs doesn't precede @a __rhs. False otherwise.
6464 : */
6465 : template<typename _CharT, typename _Traits, typename _Alloc>
6466 : inline bool
6467 : operator>=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6468 : const _CharT* __rhs)
6469 : { return __lhs.compare(__rhs) >= 0; }
6470 :
6471 : /**
6472 : * @brief Test if C string doesn't precede string.
6473 : * @param __lhs C string.
6474 : * @param __rhs String.
6475 : * @return True if @a __lhs doesn't precede @a __rhs. False otherwise.
6476 : */
6477 : template<typename _CharT, typename _Traits, typename _Alloc>
6478 : inline bool
6479 : operator>=(const _CharT* __lhs,
6480 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6481 : { return __rhs.compare(__lhs) <= 0; }
6482 : #endif // three-way comparison
6483 :
6484 : /**
6485 : * @brief Swap contents of two strings.
6486 : * @param __lhs First string.
6487 : * @param __rhs Second string.
6488 : *
6489 : * Exchanges the contents of @a __lhs and @a __rhs in constant time.
6490 : */
6491 : template<typename _CharT, typename _Traits, typename _Alloc>
6492 : inline void
6493 4167 : swap(basic_string<_CharT, _Traits, _Alloc>& __lhs,
6494 : basic_string<_CharT, _Traits, _Alloc>& __rhs)
6495 : _GLIBCXX_NOEXCEPT_IF(noexcept(__lhs.swap(__rhs)))
6496 4167 : { __lhs.swap(__rhs); }
6497 :
6498 :
6499 : /**
6500 : * @brief Read stream into a string.
6501 : * @param __is Input stream.
6502 : * @param __str Buffer to store into.
6503 : * @return Reference to the input stream.
6504 : *
6505 : * Stores characters from @a __is into @a __str until whitespace is
6506 : * found, the end of the stream is encountered, or str.max_size()
6507 : * is reached. If is.width() is non-zero, that is the limit on the
6508 : * number of characters stored into @a __str. Any previous
6509 : * contents of @a __str are erased.
6510 : */
6511 : template<typename _CharT, typename _Traits, typename _Alloc>
6512 : basic_istream<_CharT, _Traits>&
6513 : operator>>(basic_istream<_CharT, _Traits>& __is,
6514 : basic_string<_CharT, _Traits, _Alloc>& __str);
6515 :
6516 : template<>
6517 : basic_istream<char>&
6518 : operator>>(basic_istream<char>& __is, basic_string<char>& __str);
6519 :
6520 : /**
6521 : * @brief Write string to a stream.
6522 : * @param __os Output stream.
6523 : * @param __str String to write out.
6524 : * @return Reference to the output stream.
6525 : *
6526 : * Output characters of @a __str into os following the same rules as for
6527 : * writing a C string.
6528 : */
6529 : template<typename _CharT, typename _Traits, typename _Alloc>
6530 : inline basic_ostream<_CharT, _Traits>&
6531 : operator<<(basic_ostream<_CharT, _Traits>& __os,
6532 : const basic_string<_CharT, _Traits, _Alloc>& __str)
6533 : {
6534 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
6535 : // 586. string inserter not a formatted function
6536 : return __ostream_insert(__os, __str.data(), __str.size());
6537 : }
6538 :
6539 : /**
6540 : * @brief Read a line from stream into a string.
6541 : * @param __is Input stream.
6542 : * @param __str Buffer to store into.
6543 : * @param __delim Character marking end of line.
6544 : * @return Reference to the input stream.
6545 : *
6546 : * Stores characters from @a __is into @a __str until @a __delim is
6547 : * found, the end of the stream is encountered, or str.max_size()
6548 : * is reached. Any previous contents of @a __str are erased. If
6549 : * @a __delim is encountered, it is extracted but not stored into
6550 : * @a __str.
6551 : */
6552 : template<typename _CharT, typename _Traits, typename _Alloc>
6553 : basic_istream<_CharT, _Traits>&
6554 : getline(basic_istream<_CharT, _Traits>& __is,
6555 : basic_string<_CharT, _Traits, _Alloc>& __str, _CharT __delim);
6556 :
6557 : /**
6558 : * @brief Read a line from stream into a string.
6559 : * @param __is Input stream.
6560 : * @param __str Buffer to store into.
6561 : * @return Reference to the input stream.
6562 : *
6563 : * Stores characters from is into @a __str until '\n' is
6564 : * found, the end of the stream is encountered, or str.max_size()
6565 : * is reached. Any previous contents of @a __str are erased. If
6566 : * end of line is encountered, it is extracted but not stored into
6567 : * @a __str.
6568 : */
6569 : template<typename _CharT, typename _Traits, typename _Alloc>
6570 : inline basic_istream<_CharT, _Traits>&
6571 : getline(basic_istream<_CharT, _Traits>& __is,
6572 : basic_string<_CharT, _Traits, _Alloc>& __str)
6573 : { return std::getline(__is, __str, __is.widen('\n')); }
6574 :
6575 : #if __cplusplus >= 201103L
6576 : /// Read a line from an rvalue stream into a string.
6577 : template<typename _CharT, typename _Traits, typename _Alloc>
6578 : inline basic_istream<_CharT, _Traits>&
6579 : getline(basic_istream<_CharT, _Traits>&& __is,
6580 : basic_string<_CharT, _Traits, _Alloc>& __str, _CharT __delim)
6581 : { return std::getline(__is, __str, __delim); }
6582 :
6583 : /// Read a line from an rvalue stream into a string.
6584 : template<typename _CharT, typename _Traits, typename _Alloc>
6585 : inline basic_istream<_CharT, _Traits>&
6586 : getline(basic_istream<_CharT, _Traits>&& __is,
6587 : basic_string<_CharT, _Traits, _Alloc>& __str)
6588 : { return std::getline(__is, __str); }
6589 : #endif
6590 :
6591 : template<>
6592 : basic_istream<char>&
6593 : getline(basic_istream<char>& __in, basic_string<char>& __str,
6594 : char __delim);
6595 :
6596 : #ifdef _GLIBCXX_USE_WCHAR_T
6597 : template<>
6598 : basic_istream<wchar_t>&
6599 : getline(basic_istream<wchar_t>& __in, basic_string<wchar_t>& __str,
6600 : wchar_t __delim);
6601 : #endif
6602 :
6603 : _GLIBCXX_END_NAMESPACE_VERSION
6604 : } // namespace
6605 :
6606 : #if __cplusplus >= 201103L
6607 :
6608 : #include <ext/string_conversions.h>
6609 : #include <bits/charconv.h>
6610 :
6611 : namespace std _GLIBCXX_VISIBILITY(default)
6612 : {
6613 : _GLIBCXX_BEGIN_NAMESPACE_VERSION
6614 : _GLIBCXX_BEGIN_NAMESPACE_CXX11
6615 :
6616 : #if _GLIBCXX_USE_C99_STDLIB
6617 : // 21.4 Numeric Conversions [string.conversions].
6618 : inline int
6619 282 : stoi(const string& __str, size_t* __idx = 0, int __base = 10)
6620 282 : { return __gnu_cxx::__stoa<long, int>(&std::strtol, "stoi", __str.c_str(),
6621 282 : __idx, __base); }
6622 :
6623 : inline long
6624 22 : stol(const string& __str, size_t* __idx = 0, int __base = 10)
6625 22 : { return __gnu_cxx::__stoa(&std::strtol, "stol", __str.c_str(),
6626 22 : __idx, __base); }
6627 :
6628 : inline unsigned long
6629 2 : stoul(const string& __str, size_t* __idx = 0, int __base = 10)
6630 2 : { return __gnu_cxx::__stoa(&std::strtoul, "stoul", __str.c_str(),
6631 2 : __idx, __base); }
6632 :
6633 : inline long long
6634 : stoll(const string& __str, size_t* __idx = 0, int __base = 10)
6635 : { return __gnu_cxx::__stoa(&std::strtoll, "stoll", __str.c_str(),
6636 : __idx, __base); }
6637 :
6638 : inline unsigned long long
6639 8 : stoull(const string& __str, size_t* __idx = 0, int __base = 10)
6640 8 : { return __gnu_cxx::__stoa(&std::strtoull, "stoull", __str.c_str(),
6641 8 : __idx, __base); }
6642 :
6643 : // NB: strtof vs strtod.
6644 : inline float
6645 : stof(const string& __str, size_t* __idx = 0)
6646 : { return __gnu_cxx::__stoa(&std::strtof, "stof", __str.c_str(), __idx); }
6647 :
6648 : inline double
6649 33 : stod(const string& __str, size_t* __idx = 0)
6650 33 : { return __gnu_cxx::__stoa(&std::strtod, "stod", __str.c_str(), __idx); }
6651 :
6652 : inline long double
6653 : stold(const string& __str, size_t* __idx = 0)
6654 : { return __gnu_cxx::__stoa(&std::strtold, "stold", __str.c_str(), __idx); }
6655 : #endif // _GLIBCXX_USE_C99_STDLIB
6656 :
6657 : // DR 1261. Insufficent overloads for to_string / to_wstring
6658 :
6659 : inline string
6660 17930 : to_string(int __val)
6661 : {
6662 17930 : const bool __neg = __val < 0;
6663 17930 : const unsigned __uval = __neg ? (unsigned)~__val + 1u : __val;
6664 17930 : const auto __len = __detail::__to_chars_len(__uval);
6665 17930 : string __str(__neg + __len, '-');
6666 17930 : __detail::__to_chars_10_impl(&__str[__neg], __len, __uval);
6667 17930 : return __str;
6668 0 : }
6669 :
6670 : inline string
6671 3444 : to_string(unsigned __val)
6672 : {
6673 3444 : string __str(__detail::__to_chars_len(__val), '\0');
6674 3444 : __detail::__to_chars_10_impl(&__str[0], __str.size(), __val);
6675 3444 : return __str;
6676 0 : }
6677 :
6678 : inline string
6679 21710 : to_string(long __val)
6680 : {
6681 21710 : const bool __neg = __val < 0;
6682 21710 : const unsigned long __uval = __neg ? (unsigned long)~__val + 1ul : __val;
6683 21710 : const auto __len = __detail::__to_chars_len(__uval);
6684 21710 : string __str(__neg + __len, '-');
6685 21710 : __detail::__to_chars_10_impl(&__str[__neg], __len, __uval);
6686 21710 : return __str;
6687 0 : }
6688 :
6689 : inline string
6690 1400 : to_string(unsigned long __val)
6691 : {
6692 1400 : string __str(__detail::__to_chars_len(__val), '\0');
6693 1400 : __detail::__to_chars_10_impl(&__str[0], __str.size(), __val);
6694 1400 : return __str;
6695 0 : }
6696 :
6697 : inline string
6698 : to_string(long long __val)
6699 : {
6700 : const bool __neg = __val < 0;
6701 : const unsigned long long __uval
6702 : = __neg ? (unsigned long long)~__val + 1ull : __val;
6703 : const auto __len = __detail::__to_chars_len(__uval);
6704 : string __str(__neg + __len, '-');
6705 : __detail::__to_chars_10_impl(&__str[__neg], __len, __uval);
6706 : return __str;
6707 : }
6708 :
6709 : inline string
6710 : to_string(unsigned long long __val)
6711 : {
6712 : string __str(__detail::__to_chars_len(__val), '\0');
6713 : __detail::__to_chars_10_impl(&__str[0], __str.size(), __val);
6714 : return __str;
6715 : }
6716 :
6717 : #if _GLIBCXX_USE_C99_STDIO
6718 : // NB: (v)snprintf vs sprintf.
6719 :
6720 : inline string
6721 : to_string(float __val)
6722 : {
6723 : const int __n =
6724 : __gnu_cxx::__numeric_traits<float>::__max_exponent10 + 20;
6725 : return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, __n,
6726 : "%f", __val);
6727 : }
6728 :
6729 : inline string
6730 : to_string(double __val)
6731 : {
6732 : const int __n =
6733 : __gnu_cxx::__numeric_traits<double>::__max_exponent10 + 20;
6734 : return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, __n,
6735 : "%f", __val);
6736 : }
6737 :
6738 : inline string
6739 : to_string(long double __val)
6740 : {
6741 : const int __n =
6742 : __gnu_cxx::__numeric_traits<long double>::__max_exponent10 + 20;
6743 : return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, __n,
6744 : "%Lf", __val);
6745 : }
6746 : #endif // _GLIBCXX_USE_C99_STDIO
6747 :
6748 : #if defined(_GLIBCXX_USE_WCHAR_T) && _GLIBCXX_USE_C99_WCHAR
6749 : inline int
6750 : stoi(const wstring& __str, size_t* __idx = 0, int __base = 10)
6751 : { return __gnu_cxx::__stoa<long, int>(&std::wcstol, "stoi", __str.c_str(),
6752 : __idx, __base); }
6753 :
6754 : inline long
6755 : stol(const wstring& __str, size_t* __idx = 0, int __base = 10)
6756 : { return __gnu_cxx::__stoa(&std::wcstol, "stol", __str.c_str(),
6757 : __idx, __base); }
6758 :
6759 : inline unsigned long
6760 : stoul(const wstring& __str, size_t* __idx = 0, int __base = 10)
6761 : { return __gnu_cxx::__stoa(&std::wcstoul, "stoul", __str.c_str(),
6762 : __idx, __base); }
6763 :
6764 : inline long long
6765 : stoll(const wstring& __str, size_t* __idx = 0, int __base = 10)
6766 : { return __gnu_cxx::__stoa(&std::wcstoll, "stoll", __str.c_str(),
6767 : __idx, __base); }
6768 :
6769 : inline unsigned long long
6770 : stoull(const wstring& __str, size_t* __idx = 0, int __base = 10)
6771 : { return __gnu_cxx::__stoa(&std::wcstoull, "stoull", __str.c_str(),
6772 : __idx, __base); }
6773 :
6774 : // NB: wcstof vs wcstod.
6775 : inline float
6776 : stof(const wstring& __str, size_t* __idx = 0)
6777 : { return __gnu_cxx::__stoa(&std::wcstof, "stof", __str.c_str(), __idx); }
6778 :
6779 : inline double
6780 : stod(const wstring& __str, size_t* __idx = 0)
6781 : { return __gnu_cxx::__stoa(&std::wcstod, "stod", __str.c_str(), __idx); }
6782 :
6783 : inline long double
6784 : stold(const wstring& __str, size_t* __idx = 0)
6785 : { return __gnu_cxx::__stoa(&std::wcstold, "stold", __str.c_str(), __idx); }
6786 :
6787 : #ifndef _GLIBCXX_HAVE_BROKEN_VSWPRINTF
6788 : // DR 1261.
6789 : inline wstring
6790 : to_wstring(int __val)
6791 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf, 4 * sizeof(int),
6792 : L"%d", __val); }
6793 :
6794 : inline wstring
6795 : to_wstring(unsigned __val)
6796 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf,
6797 : 4 * sizeof(unsigned),
6798 : L"%u", __val); }
6799 :
6800 : inline wstring
6801 : to_wstring(long __val)
6802 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf, 4 * sizeof(long),
6803 : L"%ld", __val); }
6804 :
6805 : inline wstring
6806 : to_wstring(unsigned long __val)
6807 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf,
6808 : 4 * sizeof(unsigned long),
6809 : L"%lu", __val); }
6810 :
6811 : inline wstring
6812 : to_wstring(long long __val)
6813 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf,
6814 : 4 * sizeof(long long),
6815 : L"%lld", __val); }
6816 :
6817 : inline wstring
6818 : to_wstring(unsigned long long __val)
6819 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf,
6820 : 4 * sizeof(unsigned long long),
6821 : L"%llu", __val); }
6822 :
6823 : inline wstring
6824 : to_wstring(float __val)
6825 : {
6826 : const int __n =
6827 : __gnu_cxx::__numeric_traits<float>::__max_exponent10 + 20;
6828 : return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf, __n,
6829 : L"%f", __val);
6830 : }
6831 :
6832 : inline wstring
6833 : to_wstring(double __val)
6834 : {
6835 : const int __n =
6836 : __gnu_cxx::__numeric_traits<double>::__max_exponent10 + 20;
6837 : return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf, __n,
6838 : L"%f", __val);
6839 : }
6840 :
6841 : inline wstring
6842 : to_wstring(long double __val)
6843 : {
6844 : const int __n =
6845 : __gnu_cxx::__numeric_traits<long double>::__max_exponent10 + 20;
6846 : return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf, __n,
6847 : L"%Lf", __val);
6848 : }
6849 : #endif // _GLIBCXX_HAVE_BROKEN_VSWPRINTF
6850 : #endif // _GLIBCXX_USE_WCHAR_T && _GLIBCXX_USE_C99_WCHAR
6851 :
6852 : _GLIBCXX_END_NAMESPACE_CXX11
6853 : _GLIBCXX_END_NAMESPACE_VERSION
6854 : } // namespace
6855 :
6856 : #endif /* C++11 */
6857 :
6858 : #if __cplusplus >= 201103L
6859 :
6860 : #include <bits/functional_hash.h>
6861 :
6862 : namespace std _GLIBCXX_VISIBILITY(default)
6863 : {
6864 : _GLIBCXX_BEGIN_NAMESPACE_VERSION
6865 :
6866 : // DR 1182.
6867 :
6868 : #ifndef _GLIBCXX_COMPATIBILITY_CXX0X
6869 : /// std::hash specialization for string.
6870 : template<>
6871 : struct hash<string>
6872 : : public __hash_base<size_t, string>
6873 : {
6874 : size_t
6875 745 : operator()(const string& __s) const noexcept
6876 745 : { return std::_Hash_impl::hash(__s.data(), __s.length()); }
6877 : };
6878 :
6879 : template<>
6880 : struct __is_fast_hash<hash<string>> : std::false_type
6881 : { };
6882 :
6883 : #ifdef _GLIBCXX_USE_WCHAR_T
6884 : /// std::hash specialization for wstring.
6885 : template<>
6886 : struct hash<wstring>
6887 : : public __hash_base<size_t, wstring>
6888 : {
6889 : size_t
6890 : operator()(const wstring& __s) const noexcept
6891 : { return std::_Hash_impl::hash(__s.data(),
6892 : __s.length() * sizeof(wchar_t)); }
6893 : };
6894 :
6895 : template<>
6896 : struct __is_fast_hash<hash<wstring>> : std::false_type
6897 : { };
6898 : #endif
6899 : #endif /* _GLIBCXX_COMPATIBILITY_CXX0X */
6900 :
6901 : #ifdef _GLIBCXX_USE_CHAR8_T
6902 : /// std::hash specialization for u8string.
6903 : template<>
6904 : struct hash<u8string>
6905 : : public __hash_base<size_t, u8string>
6906 : {
6907 : size_t
6908 : operator()(const u8string& __s) const noexcept
6909 : { return std::_Hash_impl::hash(__s.data(),
6910 : __s.length() * sizeof(char8_t)); }
6911 : };
6912 :
6913 : template<>
6914 : struct __is_fast_hash<hash<u8string>> : std::false_type
6915 : { };
6916 : #endif
6917 :
6918 : /// std::hash specialization for u16string.
6919 : template<>
6920 : struct hash<u16string>
6921 : : public __hash_base<size_t, u16string>
6922 : {
6923 : size_t
6924 : operator()(const u16string& __s) const noexcept
6925 : { return std::_Hash_impl::hash(__s.data(),
6926 : __s.length() * sizeof(char16_t)); }
6927 : };
6928 :
6929 : template<>
6930 : struct __is_fast_hash<hash<u16string>> : std::false_type
6931 : { };
6932 :
6933 : /// std::hash specialization for u32string.
6934 : template<>
6935 : struct hash<u32string>
6936 : : public __hash_base<size_t, u32string>
6937 : {
6938 : size_t
6939 : operator()(const u32string& __s) const noexcept
6940 : { return std::_Hash_impl::hash(__s.data(),
6941 : __s.length() * sizeof(char32_t)); }
6942 : };
6943 :
6944 : template<>
6945 : struct __is_fast_hash<hash<u32string>> : std::false_type
6946 : { };
6947 :
6948 : #if __cplusplus >= 201402L
6949 :
6950 : #define __cpp_lib_string_udls 201304
6951 :
6952 : inline namespace literals
6953 : {
6954 : inline namespace string_literals
6955 : {
6956 : #pragma GCC diagnostic push
6957 : #pragma GCC diagnostic ignored "-Wliteral-suffix"
6958 : _GLIBCXX_DEFAULT_ABI_TAG
6959 : inline basic_string<char>
6960 506 : operator""s(const char* __str, size_t __len)
6961 506 : { return basic_string<char>{__str, __len}; }
6962 :
6963 : #ifdef _GLIBCXX_USE_WCHAR_T
6964 : _GLIBCXX_DEFAULT_ABI_TAG
6965 : inline basic_string<wchar_t>
6966 : operator""s(const wchar_t* __str, size_t __len)
6967 : { return basic_string<wchar_t>{__str, __len}; }
6968 : #endif
6969 :
6970 : #ifdef _GLIBCXX_USE_CHAR8_T
6971 : _GLIBCXX_DEFAULT_ABI_TAG
6972 : inline basic_string<char8_t>
6973 : operator""s(const char8_t* __str, size_t __len)
6974 : { return basic_string<char8_t>{__str, __len}; }
6975 : #endif
6976 :
6977 : _GLIBCXX_DEFAULT_ABI_TAG
6978 : inline basic_string<char16_t>
6979 : operator""s(const char16_t* __str, size_t __len)
6980 : { return basic_string<char16_t>{__str, __len}; }
6981 :
6982 : _GLIBCXX_DEFAULT_ABI_TAG
6983 : inline basic_string<char32_t>
6984 : operator""s(const char32_t* __str, size_t __len)
6985 : { return basic_string<char32_t>{__str, __len}; }
6986 :
6987 : #pragma GCC diagnostic pop
6988 : } // inline namespace string_literals
6989 : } // inline namespace literals
6990 :
6991 : #if __cplusplus >= 201703L
6992 : namespace __detail::__variant
6993 : {
6994 : template<typename> struct _Never_valueless_alt; // see <variant>
6995 :
6996 : // Provide the strong exception-safety guarantee when emplacing a
6997 : // basic_string into a variant, but only if moving the string cannot throw.
6998 : template<typename _Tp, typename _Traits, typename _Alloc>
6999 : struct _Never_valueless_alt<std::basic_string<_Tp, _Traits, _Alloc>>
7000 : : __and_<
7001 : is_nothrow_move_constructible<std::basic_string<_Tp, _Traits, _Alloc>>,
7002 : is_nothrow_move_assignable<std::basic_string<_Tp, _Traits, _Alloc>>
7003 : >::type
7004 : { };
7005 : } // namespace __detail::__variant
7006 : #endif // C++17
7007 : #endif // C++14
7008 :
7009 : _GLIBCXX_END_NAMESPACE_VERSION
7010 : } // namespace std
7011 :
7012 : #endif // C++11
7013 :
7014 : #endif /* _BASIC_STRING_H */
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