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1 : // Components for manipulating sequences of characters -*- C++ -*-
2 :
3 : // Copyright (C) 1997-2019 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 : #if __cplusplus >= 201703L
56 : // Support P0426R1 changes to char_traits in C++17.
57 : # define __cpp_lib_constexpr_string 201611L
58 : #endif
59 :
60 : #if _GLIBCXX_USE_CXX11_ABI
61 : _GLIBCXX_BEGIN_NAMESPACE_CXX11
62 : /**
63 : * @class basic_string basic_string.h <string>
64 : * @brief Managing sequences of characters and character-like objects.
65 : *
66 : * @ingroup strings
67 : * @ingroup sequences
68 : *
69 : * @tparam _CharT Type of character
70 : * @tparam _Traits Traits for character type, defaults to
71 : * char_traits<_CharT>.
72 : * @tparam _Alloc Allocator type, defaults to allocator<_CharT>.
73 : *
74 : * Meets the requirements of a <a href="tables.html#65">container</a>, a
75 : * <a href="tables.html#66">reversible container</a>, and a
76 : * <a href="tables.html#67">sequence</a>. Of the
77 : * <a href="tables.html#68">optional sequence requirements</a>, only
78 : * @c push_back, @c at, and @c %array access are supported.
79 : */
80 : template<typename _CharT, typename _Traits, typename _Alloc>
81 : class basic_string
82 : {
83 : typedef typename __gnu_cxx::__alloc_traits<_Alloc>::template
84 : rebind<_CharT>::other _Char_alloc_type;
85 : typedef __gnu_cxx::__alloc_traits<_Char_alloc_type> _Alloc_traits;
86 :
87 : // Types:
88 : public:
89 : typedef _Traits traits_type;
90 : typedef typename _Traits::char_type value_type;
91 : typedef _Char_alloc_type allocator_type;
92 : typedef typename _Alloc_traits::size_type size_type;
93 : typedef typename _Alloc_traits::difference_type difference_type;
94 : typedef typename _Alloc_traits::reference reference;
95 : typedef typename _Alloc_traits::const_reference const_reference;
96 : typedef typename _Alloc_traits::pointer pointer;
97 : typedef typename _Alloc_traits::const_pointer const_pointer;
98 : typedef __gnu_cxx::__normal_iterator<pointer, basic_string> iterator;
99 : typedef __gnu_cxx::__normal_iterator<const_pointer, basic_string>
100 : const_iterator;
101 : typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
102 : typedef std::reverse_iterator<iterator> reverse_iterator;
103 :
104 : /// Value returned by various member functions when they fail.
105 : static const size_type npos = static_cast<size_type>(-1);
106 :
107 : protected:
108 : // type used for positions in insert, erase etc.
109 : #if __cplusplus < 201103L
110 : typedef iterator __const_iterator;
111 : #else
112 : typedef const_iterator __const_iterator;
113 : #endif
114 :
115 : private:
116 : #if __cplusplus >= 201703L
117 : // A helper type for avoiding boiler-plate.
118 : typedef basic_string_view<_CharT, _Traits> __sv_type;
119 :
120 : template<typename _Tp, typename _Res>
121 : using _If_sv = enable_if_t<
122 : __and_<is_convertible<const _Tp&, __sv_type>,
123 : __not_<is_convertible<const _Tp*, const basic_string*>>,
124 : __not_<is_convertible<const _Tp&, const _CharT*>>>::value,
125 : _Res>;
126 :
127 : // Allows an implicit conversion to __sv_type.
128 : static __sv_type
129 : _S_to_string_view(__sv_type __svt) noexcept
130 : { return __svt; }
131 :
132 : // Wraps a string_view by explicit conversion and thus
133 : // allows to add an internal constructor that does not
134 : // participate in overload resolution when a string_view
135 : // is provided.
136 : struct __sv_wrapper
137 : {
138 : explicit __sv_wrapper(__sv_type __sv) noexcept : _M_sv(__sv) { }
139 : __sv_type _M_sv;
140 : };
141 :
142 : /**
143 : * @brief Only internally used: Construct string from a string view
144 : * wrapper.
145 : * @param __svw string view wrapper.
146 : * @param __a Allocator to use.
147 : */
148 : explicit
149 : basic_string(__sv_wrapper __svw, const _Alloc& __a)
150 : : basic_string(__svw._M_sv.data(), __svw._M_sv.size(), __a) { }
151 : #endif
152 :
153 : // Use empty-base optimization: http://www.cantrip.org/emptyopt.html
154 3315494279 : struct _Alloc_hider : allocator_type // TODO check __is_final
155 : {
156 : #if __cplusplus < 201103L
157 : _Alloc_hider(pointer __dat, const _Alloc& __a = _Alloc())
158 : : allocator_type(__a), _M_p(__dat) { }
159 : #else
160 1358376 : _Alloc_hider(pointer __dat, const _Alloc& __a)
161 1358376 : : allocator_type(__a), _M_p(__dat) { }
162 :
163 492883980 : _Alloc_hider(pointer __dat, _Alloc&& __a = _Alloc())
164 1886028042 : : allocator_type(std::move(__a)), _M_p(__dat) { }
165 : #endif
166 :
167 : pointer _M_p; // The actual data.
168 : };
169 :
170 : _Alloc_hider _M_dataplus;
171 : size_type _M_string_length;
172 :
173 : enum { _S_local_capacity = 15 / sizeof(_CharT) };
174 :
175 : union
176 : {
177 : _CharT _M_local_buf[_S_local_capacity + 1];
178 : size_type _M_allocated_capacity;
179 : };
180 :
181 : void
182 1856170253 : _M_data(pointer __p)
183 149753315 : { _M_dataplus._M_p = __p; }
184 :
185 : void
186 1929825378 : _M_length(size_type __length)
187 1929825378 : { _M_string_length = __length; }
188 :
189 : pointer
190 8065857798 : _M_data() const
191 : { return _M_dataplus._M_p; }
192 :
193 : pointer
194 3333019170 : _M_local_data()
195 : {
196 : #if __cplusplus >= 201103L
197 1112016653 : return std::pointer_traits<pointer>::pointer_to(*_M_local_buf);
198 : #else
199 : return pointer(_M_local_buf);
200 : #endif
201 : }
202 :
203 : const_pointer
204 4710319093 : _M_local_data() const
205 : {
206 : #if __cplusplus >= 201103L
207 4710319093 : return std::pointer_traits<const_pointer>::pointer_to(*_M_local_buf);
208 : #else
209 : return const_pointer(_M_local_buf);
210 : #endif
211 : }
212 :
213 : void
214 462803348 : _M_capacity(size_type __capacity)
215 149753315 : { _M_allocated_capacity = __capacity; }
216 :
217 : void
218 1929825378 : _M_set_length(size_type __n)
219 : {
220 1929825378 : _M_length(__n);
221 148563599 : traits_type::assign(_M_data()[__n], _CharT());
222 : }
223 :
224 : bool
225 4710319093 : _M_is_local() const
226 4710319093 : { return _M_data() == _M_local_data(); }
227 :
228 : // Create & Destroy
229 : pointer
230 : _M_create(size_type&, size_type);
231 :
232 : void
233 3315208326 : _M_dispose()
234 : {
235 2463849800 : if (!_M_is_local())
236 3970809918 : _M_destroy(_M_allocated_capacity);
237 : }
238 :
239 : void
240 655635680 : _M_destroy(size_type __size) throw()
241 655635680 : { _Alloc_traits::deallocate(_M_get_allocator(), _M_data(), __size + 1); }
242 :
243 : // _M_construct_aux is used to implement the 21.3.1 para 15 which
244 : // requires special behaviour if _InIterator is an integral type
245 : template<typename _InIterator>
246 : void
247 392728471 : _M_construct_aux(_InIterator __beg, _InIterator __end,
248 : std::__false_type)
249 : {
250 : typedef typename iterator_traits<_InIterator>::iterator_category _Tag;
251 392728471 : _M_construct(__beg, __end, _Tag());
252 : }
253 :
254 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
255 : // 438. Ambiguity in the "do the right thing" clause
256 : template<typename _Integer>
257 : void
258 : _M_construct_aux(_Integer __beg, _Integer __end, std::__true_type)
259 : { _M_construct_aux_2(static_cast<size_type>(__beg), __end); }
260 :
261 : void
262 : _M_construct_aux_2(size_type __req, _CharT __c)
263 : { _M_construct(__req, __c); }
264 :
265 : template<typename _InIterator>
266 : void
267 392728471 : _M_construct(_InIterator __beg, _InIterator __end)
268 : {
269 : typedef typename std::__is_integer<_InIterator>::__type _Integral;
270 392497062 : _M_construct_aux(__beg, __end, _Integral());
271 0 : }
272 :
273 : // For Input Iterators, used in istreambuf_iterators, etc.
274 : template<typename _InIterator>
275 : void
276 : _M_construct(_InIterator __beg, _InIterator __end,
277 : std::input_iterator_tag);
278 :
279 : // For forward_iterators up to random_access_iterators, used for
280 : // string::iterator, _CharT*, etc.
281 : template<typename _FwdIterator>
282 : void
283 : _M_construct(_FwdIterator __beg, _FwdIterator __end,
284 : std::forward_iterator_tag);
285 :
286 : void
287 : _M_construct(size_type __req, _CharT __c);
288 :
289 : allocator_type&
290 2048999470 : _M_get_allocator()
291 655635680 : { return _M_dataplus; }
292 :
293 : const allocator_type&
294 391371875 : _M_get_allocator() const
295 391371875 : { return _M_dataplus; }
296 :
297 : private:
298 :
299 : #ifdef _GLIBCXX_DISAMBIGUATE_REPLACE_INST
300 : // The explicit instantiations in misc-inst.cc require this due to
301 : // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64063
302 : template<typename _Tp, bool _Requires =
303 : !__are_same<_Tp, _CharT*>::__value
304 : && !__are_same<_Tp, const _CharT*>::__value
305 : && !__are_same<_Tp, iterator>::__value
306 : && !__are_same<_Tp, const_iterator>::__value>
307 : struct __enable_if_not_native_iterator
308 : { typedef basic_string& __type; };
309 : template<typename _Tp>
310 : struct __enable_if_not_native_iterator<_Tp, false> { };
311 : #endif
312 :
313 : size_type
314 : _M_check(size_type __pos, const char* __s) const
315 : {
316 : if (__pos > this->size())
317 : __throw_out_of_range_fmt(__N("%s: __pos (which is %zu) > "
318 : "this->size() (which is %zu)"),
319 : __s, __pos, this->size());
320 : return __pos;
321 : }
322 :
323 : void
324 : _M_check_length(size_type __n1, size_type __n2, const char* __s) const
325 : {
326 : if (this->max_size() - (this->size() - __n1) < __n2)
327 : __throw_length_error(__N(__s));
328 : }
329 :
330 :
331 : // NB: _M_limit doesn't check for a bad __pos value.
332 : size_type
333 : _M_limit(size_type __pos, size_type __off) const _GLIBCXX_NOEXCEPT
334 : {
335 : const bool __testoff = __off < this->size() - __pos;
336 : return __testoff ? __off : this->size() - __pos;
337 : }
338 :
339 : // True if _Rep and source do not overlap.
340 : bool
341 : _M_disjunct(const _CharT* __s) const _GLIBCXX_NOEXCEPT
342 : {
343 : return (less<const _CharT*>()(__s, _M_data())
344 : || less<const _CharT*>()(_M_data() + this->size(), __s));
345 : }
346 :
347 : // When __n = 1 way faster than the general multichar
348 : // traits_type::copy/move/assign.
349 : static void
350 382896938 : _S_copy(_CharT* __d, const _CharT* __s, size_type __n)
351 : {
352 382830689 : if (__n == 1)
353 3078903 : traits_type::assign(*__d, *__s);
354 : else
355 382830689 : traits_type::copy(__d, __s, __n);
356 : }
357 :
358 : static void
359 : _S_move(_CharT* __d, const _CharT* __s, size_type __n)
360 : {
361 : if (__n == 1)
362 : traits_type::assign(*__d, *__s);
363 : else
364 : traits_type::move(__d, __s, __n);
365 : }
366 :
367 : static void
368 : _S_assign(_CharT* __d, size_type __n, _CharT __c)
369 : {
370 : if (__n == 1)
371 : traits_type::assign(*__d, __c);
372 : else
373 : traits_type::assign(__d, __n, __c);
374 : }
375 :
376 : // _S_copy_chars is a separate template to permit specialization
377 : // to optimize for the common case of pointers as iterators.
378 : template<class _Iterator>
379 : static void
380 0 : _S_copy_chars(_CharT* __p, _Iterator __k1, _Iterator __k2)
381 : {
382 0 : for (; __k1 != __k2; ++__k1, (void)++__p)
383 0 : traits_type::assign(*__p, *__k1); // These types are off.
384 : }
385 :
386 : static void
387 0 : _S_copy_chars(_CharT* __p, iterator __k1, iterator __k2) _GLIBCXX_NOEXCEPT
388 0 : { _S_copy_chars(__p, __k1.base(), __k2.base()); }
389 :
390 : static void
391 1068 : _S_copy_chars(_CharT* __p, const_iterator __k1, const_iterator __k2)
392 : _GLIBCXX_NOEXCEPT
393 2136 : { _S_copy_chars(__p, __k1.base(), __k2.base()); }
394 :
395 : static void
396 382895514 : _S_copy_chars(_CharT* __p, _CharT* __k1, _CharT* __k2) _GLIBCXX_NOEXCEPT
397 382895514 : { _S_copy(__p, __k1, __k2 - __k1); }
398 :
399 : static void
400 1068 : _S_copy_chars(_CharT* __p, const _CharT* __k1, const _CharT* __k2)
401 : _GLIBCXX_NOEXCEPT
402 1068 : { _S_copy(__p, __k1, __k2 - __k1); }
403 :
404 : static int
405 : _S_compare(size_type __n1, size_type __n2) _GLIBCXX_NOEXCEPT
406 : {
407 : const difference_type __d = difference_type(__n1 - __n2);
408 :
409 : if (__d > __gnu_cxx::__numeric_traits<int>::__max)
410 : return __gnu_cxx::__numeric_traits<int>::__max;
411 : else if (__d < __gnu_cxx::__numeric_traits<int>::__min)
412 : return __gnu_cxx::__numeric_traits<int>::__min;
413 : else
414 : return int(__d);
415 : }
416 :
417 : void
418 : _M_assign(const basic_string&);
419 :
420 : void
421 : _M_mutate(size_type __pos, size_type __len1, const _CharT* __s,
422 : size_type __len2);
423 :
424 : void
425 : _M_erase(size_type __pos, size_type __n);
426 :
427 : public:
428 : // Construct/copy/destroy:
429 : // NB: We overload ctors in some cases instead of using default
430 : // arguments, per 17.4.4.4 para. 2 item 2.
431 :
432 : /**
433 : * @brief Default constructor creates an empty string.
434 : */
435 153562215 : basic_string()
436 : _GLIBCXX_NOEXCEPT_IF(is_nothrow_default_constructible<_Alloc>::value)
437 148561549 : : _M_dataplus(_M_local_data())
438 150538803 : { _M_set_length(0); }
439 :
440 : /**
441 : * @brief Construct an empty string using allocator @a a.
442 : */
443 : explicit
444 : basic_string(const _Alloc& __a) _GLIBCXX_NOEXCEPT
445 : : _M_dataplus(_M_local_data(), __a)
446 : { _M_set_length(0); }
447 :
448 : /**
449 : * @brief Construct string with copy of value of @a __str.
450 : * @param __str Source string.
451 : */
452 391371875 : basic_string(const basic_string& __str)
453 : : _M_dataplus(_M_local_data(),
454 313993335 : _Alloc_traits::_S_select_on_copy(__str._M_get_allocator()))
455 305740719 : { _M_construct(__str._M_data(), __str._M_data() + __str.length()); }
456 :
457 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
458 : // 2583. no way to supply an allocator for basic_string(str, pos)
459 : /**
460 : * @brief Construct string as copy of a substring.
461 : * @param __str Source string.
462 : * @param __pos Index of first character to copy from.
463 : * @param __a Allocator to use.
464 : */
465 : basic_string(const basic_string& __str, size_type __pos,
466 : const _Alloc& __a = _Alloc())
467 : : _M_dataplus(_M_local_data(), __a)
468 : {
469 : const _CharT* __start = __str._M_data()
470 : + __str._M_check(__pos, "basic_string::basic_string");
471 : _M_construct(__start, __start + __str._M_limit(__pos, npos));
472 : }
473 :
474 : /**
475 : * @brief Construct string as copy of a substring.
476 : * @param __str Source string.
477 : * @param __pos Index of first character to copy from.
478 : * @param __n Number of characters to copy.
479 : */
480 : basic_string(const basic_string& __str, size_type __pos,
481 : size_type __n)
482 : : _M_dataplus(_M_local_data())
483 : {
484 : const _CharT* __start = __str._M_data()
485 : + __str._M_check(__pos, "basic_string::basic_string");
486 : _M_construct(__start, __start + __str._M_limit(__pos, __n));
487 : }
488 :
489 : /**
490 : * @brief Construct string as copy of a substring.
491 : * @param __str Source string.
492 : * @param __pos Index of first character to copy from.
493 : * @param __n Number of characters to copy.
494 : * @param __a Allocator to use.
495 : */
496 : basic_string(const basic_string& __str, size_type __pos,
497 : size_type __n, const _Alloc& __a)
498 : : _M_dataplus(_M_local_data(), __a)
499 : {
500 : const _CharT* __start
501 : = __str._M_data() + __str._M_check(__pos, "string::string");
502 : _M_construct(__start, __start + __str._M_limit(__pos, __n));
503 : }
504 :
505 : /**
506 : * @brief Construct string initialized by a character %array.
507 : * @param __s Source character %array.
508 : * @param __n Number of characters to copy.
509 : * @param __a Allocator to use (default is default allocator).
510 : *
511 : * NB: @a __s must have at least @a __n characters, '\\0'
512 : * has no special meaning.
513 : */
514 135201 : basic_string(const _CharT* __s, size_type __n,
515 : const _Alloc& __a = _Alloc())
516 135201 : : _M_dataplus(_M_local_data(), __a)
517 135201 : { _M_construct(__s, __s + __n); }
518 :
519 : /**
520 : * @brief Construct string as copy of a C string.
521 : * @param __s Source C string.
522 : * @param __a Allocator to use (default is default allocator).
523 : */
524 : #if __cpp_deduction_guides && ! defined _GLIBCXX_DEFINING_STRING_INSTANTIATIONS
525 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
526 : // 3076. basic_string CTAD ambiguity
527 : template<typename = _RequireAllocator<_Alloc>>
528 : #endif
529 0 : basic_string(const _CharT* __s, const _Alloc& __a = _Alloc())
530 0 : : _M_dataplus(_M_local_data(), __a)
531 0 : { _M_construct(__s, __s ? __s + traits_type::length(__s) : __s+npos); }
532 :
533 : /**
534 : * @brief Construct string as multiple characters.
535 : * @param __n Number of characters.
536 : * @param __c Character to use.
537 : * @param __a Allocator to use (default is default allocator).
538 : */
539 : #if __cpp_deduction_guides && ! defined _GLIBCXX_DEFINING_STRING_INSTANTIATIONS
540 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
541 : // 3076. basic_string CTAD ambiguity
542 : template<typename = _RequireAllocator<_Alloc>>
543 : #endif
544 1782 : basic_string(size_type __n, _CharT __c, const _Alloc& __a = _Alloc())
545 1782 : : _M_dataplus(_M_local_data(), __a)
546 1782 : { _M_construct(__n, __c); }
547 :
548 : #if __cplusplus >= 201103L
549 : /**
550 : * @brief Move construct string.
551 : * @param __str Source string.
552 : *
553 : * The newly-created string contains the exact contents of @a __str.
554 : * @a __str is a valid, but unspecified string.
555 : **/
556 1393364295 : basic_string(basic_string&& __str) noexcept
557 1393364295 : : _M_dataplus(_M_local_data(), std::move(__str._M_get_allocator()))
558 : {
559 1393364295 : if (__str._M_is_local())
560 : {
561 1080313335 : traits_type::copy(_M_local_buf, __str._M_local_buf,
562 : _S_local_capacity + 1);
563 : }
564 : else
565 : {
566 313049932 : _M_data(__str._M_data());
567 313049932 : _M_capacity(__str._M_allocated_capacity);
568 : }
569 :
570 : // Must use _M_length() here not _M_set_length() because
571 : // basic_stringbuf relies on writing into unallocated capacity so
572 : // we mess up the contents if we put a '\0' in the string.
573 1393364295 : _M_length(__str.length());
574 1392071883 : __str._M_data(__str._M_local_data());
575 1392254007 : __str._M_set_length(0);
576 155930 : }
577 :
578 : /**
579 : * @brief Construct string from an initializer %list.
580 : * @param __l std::initializer_list of characters.
581 : * @param __a Allocator to use (default is default allocator).
582 : */
583 : basic_string(initializer_list<_CharT> __l, const _Alloc& __a = _Alloc())
584 : : _M_dataplus(_M_local_data(), __a)
585 : { _M_construct(__l.begin(), __l.end()); }
586 :
587 : basic_string(const basic_string& __str, const _Alloc& __a)
588 : : _M_dataplus(_M_local_data(), __a)
589 : { _M_construct(__str.begin(), __str.end()); }
590 :
591 : basic_string(basic_string&& __str, const _Alloc& __a)
592 : noexcept(_Alloc_traits::_S_always_equal())
593 : : _M_dataplus(_M_local_data(), __a)
594 : {
595 : if (__str._M_is_local())
596 : {
597 : traits_type::copy(_M_local_buf, __str._M_local_buf,
598 : _S_local_capacity + 1);
599 : _M_length(__str.length());
600 : __str._M_set_length(0);
601 : }
602 : else if (_Alloc_traits::_S_always_equal()
603 : || __str.get_allocator() == __a)
604 : {
605 : _M_data(__str._M_data());
606 : _M_length(__str.length());
607 : _M_capacity(__str._M_allocated_capacity);
608 : __str._M_data(__str._M_local_buf);
609 : __str._M_set_length(0);
610 : }
611 : else
612 : _M_construct(__str.begin(), __str.end());
613 : }
614 :
615 : #endif // C++11
616 :
617 : /**
618 : * @brief Construct string as copy of a range.
619 : * @param __beg Start of range.
620 : * @param __end End of range.
621 : * @param __a Allocator to use (default is default allocator).
622 : */
623 : #if __cplusplus >= 201103L
624 : template<typename _InputIterator,
625 : typename = std::_RequireInputIter<_InputIterator>>
626 : #else
627 : template<typename _InputIterator>
628 : #endif
629 1221398 : basic_string(_InputIterator __beg, _InputIterator __end,
630 : const _Alloc& __a = _Alloc())
631 1221398 : : _M_dataplus(_M_local_data(), __a)
632 1221398 : { _M_construct(__beg, __end); }
633 :
634 : #if __cplusplus >= 201703L
635 : /**
636 : * @brief Construct string from a substring of a string_view.
637 : * @param __t Source object convertible to string view.
638 : * @param __pos The index of the first character to copy from __t.
639 : * @param __n The number of characters to copy from __t.
640 : * @param __a Allocator to use.
641 : */
642 : template<typename _Tp, typename = _If_sv<_Tp, void>>
643 : basic_string(const _Tp& __t, size_type __pos, size_type __n,
644 : const _Alloc& __a = _Alloc())
645 : : basic_string(_S_to_string_view(__t).substr(__pos, __n), __a) { }
646 :
647 : /**
648 : * @brief Construct string from a string_view.
649 : * @param __t Source object convertible to string view.
650 : * @param __a Allocator to use (default is default allocator).
651 : */
652 : template<typename _Tp, typename = _If_sv<_Tp, void>>
653 : explicit
654 : basic_string(const _Tp& __t, const _Alloc& __a = _Alloc())
655 : : basic_string(__sv_wrapper(_S_to_string_view(__t)), __a) { }
656 : #endif // C++17
657 :
658 : /**
659 : * @brief Destroy the string instance.
660 : */
661 2462689422 : ~basic_string()
662 3230601649 : { _M_dispose(); }
663 :
664 : /**
665 : * @brief Assign the value of @a str to this string.
666 : * @param __str Source string.
667 : */
668 : basic_string&
669 114468217 : operator=(const basic_string& __str)
670 : {
671 : #if __cplusplus >= 201103L
672 : if (_Alloc_traits::_S_propagate_on_copy_assign())
673 : {
674 : if (!_Alloc_traits::_S_always_equal() && !_M_is_local()
675 : && _M_get_allocator() != __str._M_get_allocator())
676 : {
677 : // Propagating allocator cannot free existing storage so must
678 : // deallocate it before replacing current allocator.
679 : if (__str.size() <= _S_local_capacity)
680 : {
681 : _M_destroy(_M_allocated_capacity);
682 : _M_data(_M_local_data());
683 : _M_set_length(0);
684 : }
685 : else
686 : {
687 : const auto __len = __str.size();
688 : auto __alloc = __str._M_get_allocator();
689 : // If this allocation throws there are no effects:
690 : auto __ptr = _Alloc_traits::allocate(__alloc, __len + 1);
691 : _M_destroy(_M_allocated_capacity);
692 : _M_data(__ptr);
693 : _M_capacity(__len);
694 : _M_set_length(__len);
695 : }
696 : }
697 : std::__alloc_on_copy(_M_get_allocator(), __str._M_get_allocator());
698 : }
699 : #endif
700 59880218 : return this->assign(__str);
701 : }
702 :
703 : /**
704 : * @brief Copy contents of @a s into this string.
705 : * @param __s Source null-terminated string.
706 : */
707 : basic_string&
708 470291338 : operator=(const _CharT* __s)
709 440757346 : { return this->assign(__s); }
710 :
711 : /**
712 : * @brief Set value to string of length 1.
713 : * @param __c Source character.
714 : *
715 : * Assigning to a character makes this string length 1 and
716 : * (*this)[0] == @a c.
717 : */
718 : basic_string&
719 611 : operator=(_CharT __c)
720 : {
721 790 : this->assign(1, __c);
722 611 : return *this;
723 : }
724 :
725 : #if __cplusplus >= 201103L
726 : /**
727 : * @brief Move assign the value of @a str to this string.
728 : * @param __str Source string.
729 : *
730 : * The contents of @a str are moved into this string (without copying).
731 : * @a str is a valid, but unspecified string.
732 : **/
733 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
734 : // 2063. Contradictory requirements for string move assignment
735 : basic_string&
736 : operator=(basic_string&& __str)
737 : noexcept(_Alloc_traits::_S_nothrow_move())
738 : {
739 : if (!_M_is_local() && _Alloc_traits::_S_propagate_on_move_assign()
740 : && !_Alloc_traits::_S_always_equal()
741 : && _M_get_allocator() != __str._M_get_allocator())
742 : {
743 : // Destroy existing storage before replacing allocator.
744 : _M_destroy(_M_allocated_capacity);
745 : _M_data(_M_local_data());
746 : _M_set_length(0);
747 : }
748 : // Replace allocator if POCMA is true.
749 : std::__alloc_on_move(_M_get_allocator(), __str._M_get_allocator());
750 :
751 : if (__str._M_is_local())
752 : {
753 : // We've always got room for a short string, just copy it.
754 : if (__str.size())
755 : this->_S_copy(_M_data(), __str._M_data(), __str.size());
756 : _M_set_length(__str.size());
757 : }
758 : else if (_Alloc_traits::_S_propagate_on_move_assign()
759 : || _Alloc_traits::_S_always_equal()
760 : || _M_get_allocator() == __str._M_get_allocator())
761 : {
762 : // Just move the allocated pointer, our allocator can free it.
763 : pointer __data = nullptr;
764 : size_type __capacity;
765 : if (!_M_is_local())
766 : {
767 : if (_Alloc_traits::_S_always_equal())
768 : {
769 : // __str can reuse our existing storage.
770 : __data = _M_data();
771 : __capacity = _M_allocated_capacity;
772 : }
773 : else // __str can't use it, so free it.
774 : _M_destroy(_M_allocated_capacity);
775 : }
776 :
777 : _M_data(__str._M_data());
778 : _M_length(__str.length());
779 : _M_capacity(__str._M_allocated_capacity);
780 : if (__data)
781 : {
782 : __str._M_data(__data);
783 : __str._M_capacity(__capacity);
784 : }
785 : else
786 : __str._M_data(__str._M_local_buf);
787 : }
788 : else // Need to do a deep copy
789 : assign(__str);
790 : __str.clear();
791 : return *this;
792 : }
793 :
794 : /**
795 : * @brief Set value to string constructed from initializer %list.
796 : * @param __l std::initializer_list.
797 : */
798 : basic_string&
799 : operator=(initializer_list<_CharT> __l)
800 : {
801 : this->assign(__l.begin(), __l.size());
802 : return *this;
803 : }
804 : #endif // C++11
805 :
806 : #if __cplusplus >= 201703L
807 : /**
808 : * @brief Set value to string constructed from a string_view.
809 : * @param __svt An object convertible to string_view.
810 : */
811 : template<typename _Tp>
812 : _If_sv<_Tp, basic_string&>
813 : operator=(const _Tp& __svt)
814 : { return this->assign(__svt); }
815 :
816 : /**
817 : * @brief Convert to a string_view.
818 : * @return A string_view.
819 : */
820 : operator __sv_type() const noexcept
821 : { return __sv_type(data(), size()); }
822 : #endif // C++17
823 :
824 : // Iterators:
825 : /**
826 : * Returns a read/write iterator that points to the first character in
827 : * the %string.
828 : */
829 : iterator
830 15053 : begin() _GLIBCXX_NOEXCEPT
831 15052 : { return iterator(_M_data()); }
832 :
833 : /**
834 : * Returns a read-only (constant) iterator that points to the first
835 : * character in the %string.
836 : */
837 : const_iterator
838 41066916 : begin() const _GLIBCXX_NOEXCEPT
839 41066916 : { return const_iterator(_M_data()); }
840 :
841 : /**
842 : * Returns a read/write iterator that points one past the last
843 : * character in the %string.
844 : */
845 : iterator
846 15053 : end() _GLIBCXX_NOEXCEPT
847 15053 : { return iterator(_M_data() + this->size()); }
848 :
849 : /**
850 : * Returns a read-only (constant) iterator that points one past the
851 : * last character in the %string.
852 : */
853 : const_iterator
854 41065848 : end() const _GLIBCXX_NOEXCEPT
855 40895272 : { return const_iterator(_M_data() + this->size()); }
856 :
857 : /**
858 : * Returns a read/write reverse iterator that points to the last
859 : * character in the %string. Iteration is done in reverse element
860 : * order.
861 : */
862 : reverse_iterator
863 : rbegin() _GLIBCXX_NOEXCEPT
864 : { return reverse_iterator(this->end()); }
865 :
866 : /**
867 : * Returns a read-only (constant) reverse iterator that points
868 : * to the last character in the %string. Iteration is done in
869 : * reverse element order.
870 : */
871 : const_reverse_iterator
872 : rbegin() const _GLIBCXX_NOEXCEPT
873 : { return const_reverse_iterator(this->end()); }
874 :
875 : /**
876 : * Returns a read/write reverse iterator that points to one before the
877 : * first character in the %string. Iteration is done in reverse
878 : * element order.
879 : */
880 : reverse_iterator
881 : rend() _GLIBCXX_NOEXCEPT
882 : { return reverse_iterator(this->begin()); }
883 :
884 : /**
885 : * Returns a read-only (constant) reverse iterator that points
886 : * to one before the first character in the %string. Iteration
887 : * is done in reverse element order.
888 : */
889 : const_reverse_iterator
890 : rend() const _GLIBCXX_NOEXCEPT
891 : { return const_reverse_iterator(this->begin()); }
892 :
893 : #if __cplusplus >= 201103L
894 : /**
895 : * Returns a read-only (constant) iterator that points to the first
896 : * character in the %string.
897 : */
898 : const_iterator
899 : cbegin() const noexcept
900 : { return const_iterator(this->_M_data()); }
901 :
902 : /**
903 : * Returns a read-only (constant) iterator that points one past the
904 : * last character in the %string.
905 : */
906 : const_iterator
907 : cend() const noexcept
908 : { return const_iterator(this->_M_data() + this->size()); }
909 :
910 : /**
911 : * Returns a read-only (constant) reverse iterator that points
912 : * to the last character in the %string. Iteration is done in
913 : * reverse element order.
914 : */
915 : const_reverse_iterator
916 : crbegin() const noexcept
917 : { return const_reverse_iterator(this->end()); }
918 :
919 : /**
920 : * Returns a read-only (constant) reverse iterator that points
921 : * to one before the first character in the %string. Iteration
922 : * is done in reverse element order.
923 : */
924 : const_reverse_iterator
925 : crend() const noexcept
926 : { return const_reverse_iterator(this->begin()); }
927 : #endif
928 :
929 : public:
930 : // Capacity:
931 : /// Returns the number of characters in the string, not including any
932 : /// null-termination.
933 : size_type
934 272622197 : size() const _GLIBCXX_NOEXCEPT
935 : { return _M_string_length; }
936 :
937 : /// Returns the number of characters in the string, not including any
938 : /// null-termination.
939 : size_type
940 1735752181 : length() const _GLIBCXX_NOEXCEPT
941 : { return _M_string_length; }
942 :
943 : /// Returns the size() of the largest possible %string.
944 : size_type
945 : max_size() const _GLIBCXX_NOEXCEPT
946 : { return (_Alloc_traits::max_size(_M_get_allocator()) - 1) / 2; }
947 :
948 : /**
949 : * @brief Resizes the %string to the specified number of characters.
950 : * @param __n Number of characters the %string should contain.
951 : * @param __c Character to fill any new elements.
952 : *
953 : * This function will %resize the %string to the specified
954 : * number of characters. If the number is smaller than the
955 : * %string's current size the %string is truncated, otherwise
956 : * the %string is extended and new elements are %set to @a __c.
957 : */
958 : void
959 : resize(size_type __n, _CharT __c);
960 :
961 : /**
962 : * @brief Resizes the %string to the specified number of characters.
963 : * @param __n Number of characters the %string should contain.
964 : *
965 : * This function will resize the %string to the specified length. If
966 : * the new size is smaller than the %string's current size the %string
967 : * is truncated, otherwise the %string is extended and new characters
968 : * are default-constructed. For basic types such as char, this means
969 : * setting them to 0.
970 : */
971 : void
972 53736 : resize(size_type __n)
973 53736 : { this->resize(__n, _CharT()); }
974 :
975 : #if __cplusplus >= 201103L
976 : /// A non-binding request to reduce capacity() to size().
977 : void
978 : shrink_to_fit() noexcept
979 : {
980 : #if __cpp_exceptions
981 : if (capacity() > size())
982 : {
983 : try
984 : { reserve(0); }
985 : catch(...)
986 : { }
987 : }
988 : #endif
989 : }
990 : #endif
991 :
992 : /**
993 : * Returns the total number of characters that the %string can hold
994 : * before needing to allocate more memory.
995 : */
996 : size_type
997 523231 : capacity() const _GLIBCXX_NOEXCEPT
998 : {
999 1460522 : return _M_is_local() ? size_type(_S_local_capacity)
1000 : : _M_allocated_capacity;
1001 : }
1002 :
1003 : /**
1004 : * @brief Attempt to preallocate enough memory for specified number of
1005 : * characters.
1006 : * @param __res_arg Number of characters required.
1007 : * @throw std::length_error If @a __res_arg exceeds @c max_size().
1008 : *
1009 : * This function attempts to reserve enough memory for the
1010 : * %string to hold the specified number of characters. If the
1011 : * number requested is more than max_size(), length_error is
1012 : * thrown.
1013 : *
1014 : * The advantage of this function is that if optimal code is a
1015 : * necessity and the user can determine the string length that will be
1016 : * required, the user can reserve the memory in %advance, and thus
1017 : * prevent a possible reallocation of memory and copying of %string
1018 : * data.
1019 : */
1020 : void
1021 : reserve(size_type __res_arg = 0);
1022 :
1023 : /**
1024 : * Erases the string, making it empty.
1025 : */
1026 : void
1027 982 : clear() _GLIBCXX_NOEXCEPT
1028 982 : { _M_set_length(0); }
1029 :
1030 : /**
1031 : * Returns true if the %string is empty. Equivalent to
1032 : * <code>*this == ""</code>.
1033 : */
1034 : _GLIBCXX_NODISCARD bool
1035 72981394 : empty() const _GLIBCXX_NOEXCEPT
1036 62788041 : { return this->size() == 0; }
1037 :
1038 : // Element access:
1039 : /**
1040 : * @brief Subscript access to the data contained in the %string.
1041 : * @param __pos The index of the character to access.
1042 : * @return Read-only (constant) reference to the character.
1043 : *
1044 : * This operator allows for easy, array-style, data access.
1045 : * Note that data access with this operator is unchecked and
1046 : * out_of_range lookups are not defined. (For checked lookups
1047 : * see at().)
1048 : */
1049 : const_reference
1050 9932809 : operator[] (size_type __pos) const _GLIBCXX_NOEXCEPT
1051 : {
1052 : __glibcxx_assert(__pos <= size());
1053 4274629 : return _M_data()[__pos];
1054 : }
1055 :
1056 : /**
1057 : * @brief Subscript access to the data contained in the %string.
1058 : * @param __pos The index of the character to access.
1059 : * @return Read/write reference to the character.
1060 : *
1061 : * This operator allows for easy, array-style, data access.
1062 : * Note that data access with this operator is unchecked and
1063 : * out_of_range lookups are not defined. (For checked lookups
1064 : * see at().)
1065 : */
1066 : reference
1067 4113049 : operator[](size_type __pos)
1068 : {
1069 : // Allow pos == size() both in C++98 mode, as v3 extension,
1070 : // and in C++11 mode.
1071 : __glibcxx_assert(__pos <= size());
1072 : // In pedantic mode be strict in C++98 mode.
1073 : _GLIBCXX_DEBUG_PEDASSERT(__cplusplus >= 201103L || __pos < size());
1074 3317920 : return _M_data()[__pos];
1075 : }
1076 :
1077 : /**
1078 : * @brief Provides access to the data contained in the %string.
1079 : * @param __n The index of the character to access.
1080 : * @return Read-only (const) reference to the character.
1081 : * @throw std::out_of_range If @a n is an invalid index.
1082 : *
1083 : * This function provides for safer data access. The parameter is
1084 : * first checked that it is in the range of the string. The function
1085 : * throws out_of_range if the check fails.
1086 : */
1087 : const_reference
1088 : at(size_type __n) const
1089 : {
1090 : if (__n >= this->size())
1091 : __throw_out_of_range_fmt(__N("basic_string::at: __n "
1092 : "(which is %zu) >= this->size() "
1093 : "(which is %zu)"),
1094 : __n, this->size());
1095 : return _M_data()[__n];
1096 : }
1097 :
1098 : /**
1099 : * @brief Provides access to the data contained in the %string.
1100 : * @param __n The index of the character to access.
1101 : * @return Read/write reference to the character.
1102 : * @throw std::out_of_range If @a n is an invalid index.
1103 : *
1104 : * This function provides for safer data access. The parameter is
1105 : * first checked that it is in the range of the string. The function
1106 : * throws out_of_range if the check fails.
1107 : */
1108 : reference
1109 0 : at(size_type __n)
1110 : {
1111 0 : if (__n >= size())
1112 0 : __throw_out_of_range_fmt(__N("basic_string::at: __n "
1113 : "(which is %zu) >= this->size() "
1114 : "(which is %zu)"),
1115 : __n, this->size());
1116 0 : return _M_data()[__n];
1117 : }
1118 :
1119 : #if __cplusplus >= 201103L
1120 : /**
1121 : * Returns a read/write reference to the data at the first
1122 : * element of the %string.
1123 : */
1124 : reference
1125 0 : front() noexcept
1126 : {
1127 : __glibcxx_assert(!empty());
1128 0 : return operator[](0);
1129 : }
1130 :
1131 : /**
1132 : * Returns a read-only (constant) reference to the data at the first
1133 : * element of the %string.
1134 : */
1135 : const_reference
1136 : front() const noexcept
1137 : {
1138 : __glibcxx_assert(!empty());
1139 : return operator[](0);
1140 : }
1141 :
1142 : /**
1143 : * Returns a read/write reference to the data at the last
1144 : * element of the %string.
1145 : */
1146 : reference
1147 0 : back() noexcept
1148 : {
1149 : __glibcxx_assert(!empty());
1150 0 : return operator[](this->size() - 1);
1151 : }
1152 :
1153 : /**
1154 : * Returns a read-only (constant) reference to the data at the
1155 : * last element of the %string.
1156 : */
1157 : const_reference
1158 : back() const noexcept
1159 : {
1160 : __glibcxx_assert(!empty());
1161 : return operator[](this->size() - 1);
1162 : }
1163 : #endif
1164 :
1165 : // Modifiers:
1166 : /**
1167 : * @brief Append a string to this string.
1168 : * @param __str The string to append.
1169 : * @return Reference to this string.
1170 : */
1171 : basic_string&
1172 62053898 : operator+=(const basic_string& __str)
1173 23614353 : { return this->append(__str); }
1174 :
1175 : /**
1176 : * @brief Append a C string.
1177 : * @param __s The C string to append.
1178 : * @return Reference to this string.
1179 : */
1180 : basic_string&
1181 15348259 : operator+=(const _CharT* __s)
1182 15271816 : { return this->append(__s); }
1183 :
1184 : /**
1185 : * @brief Append a character.
1186 : * @param __c The character to append.
1187 : * @return Reference to this string.
1188 : */
1189 : basic_string&
1190 4508815 : operator+=(_CharT __c)
1191 : {
1192 4508815 : this->push_back(__c);
1193 46 : return *this;
1194 : }
1195 :
1196 : #if __cplusplus >= 201103L
1197 : /**
1198 : * @brief Append an initializer_list of characters.
1199 : * @param __l The initializer_list of characters to be appended.
1200 : * @return Reference to this string.
1201 : */
1202 : basic_string&
1203 : operator+=(initializer_list<_CharT> __l)
1204 : { return this->append(__l.begin(), __l.size()); }
1205 : #endif // C++11
1206 :
1207 : #if __cplusplus >= 201703L
1208 : /**
1209 : * @brief Append a string_view.
1210 : * @param __svt An object convertible to string_view to be appended.
1211 : * @return Reference to this string.
1212 : */
1213 : template<typename _Tp>
1214 : _If_sv<_Tp, basic_string&>
1215 : operator+=(const _Tp& __svt)
1216 : { return this->append(__svt); }
1217 : #endif // C++17
1218 :
1219 : /**
1220 : * @brief Append a string to this string.
1221 : * @param __str The string to append.
1222 : * @return Reference to this string.
1223 : */
1224 : basic_string&
1225 91781923 : append(const basic_string& __str)
1226 62653508 : { return _M_append(__str._M_data(), __str.size()); }
1227 :
1228 : /**
1229 : * @brief Append a substring.
1230 : * @param __str The string to append.
1231 : * @param __pos Index of the first character of str to append.
1232 : * @param __n The number of characters to append.
1233 : * @return Reference to this string.
1234 : * @throw std::out_of_range if @a __pos is not a valid index.
1235 : *
1236 : * This function appends @a __n characters from @a __str
1237 : * starting at @a __pos to this string. If @a __n is is larger
1238 : * than the number of available characters in @a __str, the
1239 : * remainder of @a __str is appended.
1240 : */
1241 : basic_string&
1242 : append(const basic_string& __str, size_type __pos, size_type __n = npos)
1243 : { return _M_append(__str._M_data()
1244 : + __str._M_check(__pos, "basic_string::append"),
1245 : __str._M_limit(__pos, __n)); }
1246 :
1247 : /**
1248 : * @brief Append a C substring.
1249 : * @param __s The C string to append.
1250 : * @param __n The number of characters to append.
1251 : * @return Reference to this string.
1252 : */
1253 : basic_string&
1254 : append(const _CharT* __s, size_type __n)
1255 : {
1256 : __glibcxx_requires_string_len(__s, __n);
1257 : _M_check_length(size_type(0), __n, "basic_string::append");
1258 : return _M_append(__s, __n);
1259 : }
1260 :
1261 : /**
1262 : * @brief Append a C string.
1263 : * @param __s The C string to append.
1264 : * @return Reference to this string.
1265 : */
1266 : basic_string&
1267 : append(const _CharT* __s)
1268 : {
1269 : __glibcxx_requires_string(__s);
1270 : const size_type __n = traits_type::length(__s);
1271 : _M_check_length(size_type(0), __n, "basic_string::append");
1272 : return _M_append(__s, __n);
1273 : }
1274 :
1275 : /**
1276 : * @brief Append multiple characters.
1277 : * @param __n The number of characters to append.
1278 : * @param __c The character to use.
1279 : * @return Reference to this string.
1280 : *
1281 : * Appends __n copies of __c to this string.
1282 : */
1283 : basic_string&
1284 5048 : append(size_type __n, _CharT __c)
1285 2194 : { return _M_replace_aux(this->size(), size_type(0), __n, __c); }
1286 :
1287 : #if __cplusplus >= 201103L
1288 : /**
1289 : * @brief Append an initializer_list of characters.
1290 : * @param __l The initializer_list of characters to append.
1291 : * @return Reference to this string.
1292 : */
1293 : basic_string&
1294 : append(initializer_list<_CharT> __l)
1295 : { return this->append(__l.begin(), __l.size()); }
1296 : #endif // C++11
1297 :
1298 : /**
1299 : * @brief Append a range of characters.
1300 : * @param __first Iterator referencing the first character to append.
1301 : * @param __last Iterator marking the end of the range.
1302 : * @return Reference to this string.
1303 : *
1304 : * Appends characters in the range [__first,__last) to this string.
1305 : */
1306 : #if __cplusplus >= 201103L
1307 : template<class _InputIterator,
1308 : typename = std::_RequireInputIter<_InputIterator>>
1309 : #else
1310 : template<class _InputIterator>
1311 : #endif
1312 : basic_string&
1313 0 : append(_InputIterator __first, _InputIterator __last)
1314 0 : { return this->replace(end(), end(), __first, __last); }
1315 :
1316 : #if __cplusplus >= 201703L
1317 : /**
1318 : * @brief Append a string_view.
1319 : * @param __svt An object convertible to string_view to be appended.
1320 : * @return Reference to this string.
1321 : */
1322 : template<typename _Tp>
1323 : _If_sv<_Tp, basic_string&>
1324 : append(const _Tp& __svt)
1325 : {
1326 : __sv_type __sv = __svt;
1327 : return this->append(__sv.data(), __sv.size());
1328 : }
1329 :
1330 : /**
1331 : * @brief Append a range of characters from a string_view.
1332 : * @param __svt An object convertible to string_view to be appended from.
1333 : * @param __pos The position in the string_view to append from.
1334 : * @param __n The number of characters to append from the string_view.
1335 : * @return Reference to this string.
1336 : */
1337 : template<typename _Tp>
1338 : _If_sv<_Tp, basic_string&>
1339 : append(const _Tp& __svt, size_type __pos, size_type __n = npos)
1340 : {
1341 : __sv_type __sv = __svt;
1342 : return _M_append(__sv.data()
1343 : + std::__sv_check(__sv.size(), __pos, "basic_string::append"),
1344 : std::__sv_limit(__sv.size(), __pos, __n));
1345 : }
1346 : #endif // C++17
1347 :
1348 : /**
1349 : * @brief Append a single character.
1350 : * @param __c Character to append.
1351 : */
1352 : void
1353 : push_back(_CharT __c)
1354 : {
1355 : const size_type __size = this->size();
1356 : if (__size + 1 > this->capacity())
1357 : this->_M_mutate(__size, size_type(0), 0, size_type(1));
1358 : traits_type::assign(this->_M_data()[__size], __c);
1359 : this->_M_set_length(__size + 1);
1360 : }
1361 :
1362 : /**
1363 : * @brief Set value to contents of another string.
1364 : * @param __str Source string to use.
1365 : * @return Reference to this string.
1366 : */
1367 : basic_string&
1368 114468217 : assign(const basic_string& __str)
1369 : {
1370 114462161 : this->_M_assign(__str);
1371 : return *this;
1372 : }
1373 :
1374 : #if __cplusplus >= 201103L
1375 : /**
1376 : * @brief Set value to contents of another string.
1377 : * @param __str Source string to use.
1378 : * @return Reference to this string.
1379 : *
1380 : * This function sets this string to the exact contents of @a __str.
1381 : * @a __str is a valid, but unspecified string.
1382 : */
1383 : basic_string&
1384 : assign(basic_string&& __str)
1385 : noexcept(_Alloc_traits::_S_nothrow_move())
1386 : {
1387 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
1388 : // 2063. Contradictory requirements for string move assignment
1389 : return *this = std::move(__str);
1390 : }
1391 : #endif // C++11
1392 :
1393 : /**
1394 : * @brief Set value to a substring of a string.
1395 : * @param __str The string to use.
1396 : * @param __pos Index of the first character of str.
1397 : * @param __n Number of characters to use.
1398 : * @return Reference to this string.
1399 : * @throw std::out_of_range if @a pos is not a valid index.
1400 : *
1401 : * This function sets this string to the substring of @a __str
1402 : * consisting of @a __n characters at @a __pos. If @a __n is
1403 : * is larger than the number of available characters in @a
1404 : * __str, the remainder of @a __str is used.
1405 : */
1406 : basic_string&
1407 : assign(const basic_string& __str, size_type __pos, size_type __n = npos)
1408 : { return _M_replace(size_type(0), this->size(), __str._M_data()
1409 : + __str._M_check(__pos, "basic_string::assign"),
1410 : __str._M_limit(__pos, __n)); }
1411 :
1412 : /**
1413 : * @brief Set value to a C substring.
1414 : * @param __s The C string to use.
1415 : * @param __n Number of characters to use.
1416 : * @return Reference to this string.
1417 : *
1418 : * This function sets the value of this string to the first @a __n
1419 : * characters of @a __s. If @a __n is is larger than the number of
1420 : * available characters in @a __s, the remainder of @a __s is used.
1421 : */
1422 : basic_string&
1423 0 : assign(const _CharT* __s, size_type __n)
1424 : {
1425 : __glibcxx_requires_string_len(__s, __n);
1426 0 : return _M_replace(size_type(0), this->size(), __s, __n);
1427 : }
1428 :
1429 : /**
1430 : * @brief Set value to contents of a C string.
1431 : * @param __s The C string to use.
1432 : * @return Reference to this string.
1433 : *
1434 : * This function sets the value of this string to the value of @a __s.
1435 : * The data is copied, so there is no dependence on @a __s once the
1436 : * function returns.
1437 : */
1438 : basic_string&
1439 : assign(const _CharT* __s)
1440 : {
1441 : __glibcxx_requires_string(__s);
1442 : return _M_replace(size_type(0), this->size(), __s,
1443 : traits_type::length(__s));
1444 : }
1445 :
1446 : /**
1447 : * @brief Set value to multiple characters.
1448 : * @param __n Length of the resulting string.
1449 : * @param __c The character to use.
1450 : * @return Reference to this string.
1451 : *
1452 : * This function sets the value of this string to @a __n copies of
1453 : * character @a __c.
1454 : */
1455 : basic_string&
1456 10161 : assign(size_type __n, _CharT __c)
1457 10161 : { return _M_replace_aux(size_type(0), this->size(), __n, __c); }
1458 :
1459 : /**
1460 : * @brief Set value to a range of characters.
1461 : * @param __first Iterator referencing the first character to append.
1462 : * @param __last Iterator marking the end of the range.
1463 : * @return Reference to this string.
1464 : *
1465 : * Sets value of string to characters in the range [__first,__last).
1466 : */
1467 : #if __cplusplus >= 201103L
1468 : template<class _InputIterator,
1469 : typename = std::_RequireInputIter<_InputIterator>>
1470 : #else
1471 : template<class _InputIterator>
1472 : #endif
1473 : basic_string&
1474 1782 : assign(_InputIterator __first, _InputIterator __last)
1475 1782 : { return this->replace(begin(), end(), __first, __last); }
1476 :
1477 : #if __cplusplus >= 201103L
1478 : /**
1479 : * @brief Set value to an initializer_list of characters.
1480 : * @param __l The initializer_list of characters to assign.
1481 : * @return Reference to this string.
1482 : */
1483 : basic_string&
1484 : assign(initializer_list<_CharT> __l)
1485 : { return this->assign(__l.begin(), __l.size()); }
1486 : #endif // C++11
1487 :
1488 : #if __cplusplus >= 201703L
1489 : /**
1490 : * @brief Set value from a string_view.
1491 : * @param __svt The source object convertible to string_view.
1492 : * @return Reference to this string.
1493 : */
1494 : template<typename _Tp>
1495 : _If_sv<_Tp, basic_string&>
1496 : assign(const _Tp& __svt)
1497 : {
1498 : __sv_type __sv = __svt;
1499 : return this->assign(__sv.data(), __sv.size());
1500 : }
1501 :
1502 : /**
1503 : * @brief Set value from a range of characters in a string_view.
1504 : * @param __svt The source object convertible to string_view.
1505 : * @param __pos The position in the string_view to assign from.
1506 : * @param __n The number of characters to assign.
1507 : * @return Reference to this string.
1508 : */
1509 : template<typename _Tp>
1510 : _If_sv<_Tp, basic_string&>
1511 : assign(const _Tp& __svt, size_type __pos, size_type __n = npos)
1512 : {
1513 : __sv_type __sv = __svt;
1514 : return _M_replace(size_type(0), this->size(),
1515 : __sv.data()
1516 : + std::__sv_check(__sv.size(), __pos, "basic_string::assign"),
1517 : std::__sv_limit(__sv.size(), __pos, __n));
1518 : }
1519 : #endif // C++17
1520 :
1521 : #if __cplusplus >= 201103L
1522 : /**
1523 : * @brief Insert multiple characters.
1524 : * @param __p Const_iterator referencing location in string to
1525 : * insert at.
1526 : * @param __n Number of characters to insert
1527 : * @param __c The character to insert.
1528 : * @return Iterator referencing the first inserted char.
1529 : * @throw std::length_error If new length exceeds @c max_size().
1530 : *
1531 : * Inserts @a __n copies of character @a __c starting at the
1532 : * position referenced by iterator @a __p. If adding
1533 : * characters causes the length to exceed max_size(),
1534 : * length_error is thrown. The value of the string doesn't
1535 : * change if an error is thrown.
1536 : */
1537 : iterator
1538 : insert(const_iterator __p, size_type __n, _CharT __c)
1539 : {
1540 : _GLIBCXX_DEBUG_PEDASSERT(__p >= begin() && __p <= end());
1541 : const size_type __pos = __p - begin();
1542 : this->replace(__p, __p, __n, __c);
1543 : return iterator(this->_M_data() + __pos);
1544 : }
1545 : #else
1546 : /**
1547 : * @brief Insert multiple characters.
1548 : * @param __p Iterator referencing location in string to insert at.
1549 : * @param __n Number of characters to insert
1550 : * @param __c The character to insert.
1551 : * @throw std::length_error If new length exceeds @c max_size().
1552 : *
1553 : * Inserts @a __n copies of character @a __c starting at the
1554 : * position referenced by iterator @a __p. If adding
1555 : * characters causes the length to exceed max_size(),
1556 : * length_error is thrown. The value of the string doesn't
1557 : * change if an error is thrown.
1558 : */
1559 : void
1560 : insert(iterator __p, size_type __n, _CharT __c)
1561 : { this->replace(__p, __p, __n, __c); }
1562 : #endif
1563 :
1564 : #if __cplusplus >= 201103L
1565 : /**
1566 : * @brief Insert a range of characters.
1567 : * @param __p Const_iterator referencing location in string to
1568 : * insert at.
1569 : * @param __beg Start of range.
1570 : * @param __end End of range.
1571 : * @return Iterator referencing the first inserted char.
1572 : * @throw std::length_error If new length exceeds @c max_size().
1573 : *
1574 : * Inserts characters in range [beg,end). If adding characters
1575 : * causes the length to exceed max_size(), length_error is
1576 : * thrown. The value of the string doesn't change if an error
1577 : * is thrown.
1578 : */
1579 : template<class _InputIterator,
1580 : typename = std::_RequireInputIter<_InputIterator>>
1581 : iterator
1582 0 : insert(const_iterator __p, _InputIterator __beg, _InputIterator __end)
1583 : {
1584 : _GLIBCXX_DEBUG_PEDASSERT(__p >= begin() && __p <= end());
1585 0 : const size_type __pos = __p - begin();
1586 0 : this->replace(__p, __p, __beg, __end);
1587 0 : return iterator(this->_M_data() + __pos);
1588 : }
1589 : #else
1590 : /**
1591 : * @brief Insert a range of characters.
1592 : * @param __p Iterator referencing location in string to insert at.
1593 : * @param __beg Start of range.
1594 : * @param __end End of range.
1595 : * @throw std::length_error If new length exceeds @c max_size().
1596 : *
1597 : * Inserts characters in range [__beg,__end). If adding
1598 : * characters causes the length to exceed max_size(),
1599 : * length_error is thrown. The value of the string doesn't
1600 : * change if an error is thrown.
1601 : */
1602 : template<class _InputIterator>
1603 : void
1604 : insert(iterator __p, _InputIterator __beg, _InputIterator __end)
1605 : { this->replace(__p, __p, __beg, __end); }
1606 : #endif
1607 :
1608 : #if __cplusplus >= 201103L
1609 : /**
1610 : * @brief Insert an initializer_list of characters.
1611 : * @param __p Iterator referencing location in string to insert at.
1612 : * @param __l The initializer_list of characters to insert.
1613 : * @throw std::length_error If new length exceeds @c max_size().
1614 : */
1615 : iterator
1616 : insert(const_iterator __p, initializer_list<_CharT> __l)
1617 : { return this->insert(__p, __l.begin(), __l.end()); }
1618 :
1619 : #ifdef _GLIBCXX_DEFINING_STRING_INSTANTIATIONS
1620 : // See PR libstdc++/83328
1621 : void
1622 : insert(iterator __p, initializer_list<_CharT> __l)
1623 : {
1624 : _GLIBCXX_DEBUG_PEDASSERT(__p >= begin() && __p <= end());
1625 : this->insert(__p - begin(), __l.begin(), __l.size());
1626 : }
1627 : #endif
1628 : #endif // C++11
1629 :
1630 : /**
1631 : * @brief Insert value of a string.
1632 : * @param __pos1 Iterator referencing location in string to insert at.
1633 : * @param __str The string to insert.
1634 : * @return Reference to this string.
1635 : * @throw std::length_error If new length exceeds @c max_size().
1636 : *
1637 : * Inserts value of @a __str starting at @a __pos1. If adding
1638 : * characters causes the length to exceed max_size(),
1639 : * length_error is thrown. The value of the string doesn't
1640 : * change if an error is thrown.
1641 : */
1642 : basic_string&
1643 149412 : insert(size_type __pos1, const basic_string& __str)
1644 : { return this->replace(__pos1, size_type(0),
1645 149412 : __str._M_data(), __str.size()); }
1646 :
1647 : /**
1648 : * @brief Insert a substring.
1649 : * @param __pos1 Iterator referencing location in string to insert at.
1650 : * @param __str The string to insert.
1651 : * @param __pos2 Start of characters in str to insert.
1652 : * @param __n Number of characters to insert.
1653 : * @return Reference to this string.
1654 : * @throw std::length_error If new length exceeds @c max_size().
1655 : * @throw std::out_of_range If @a pos1 > size() or
1656 : * @a __pos2 > @a str.size().
1657 : *
1658 : * Starting at @a pos1, insert @a __n character of @a __str
1659 : * beginning with @a __pos2. If adding characters causes the
1660 : * length to exceed max_size(), length_error is thrown. If @a
1661 : * __pos1 is beyond the end of this string or @a __pos2 is
1662 : * beyond the end of @a __str, out_of_range is thrown. The
1663 : * value of the string doesn't change if an error is thrown.
1664 : */
1665 : basic_string&
1666 : insert(size_type __pos1, const basic_string& __str,
1667 : size_type __pos2, size_type __n = npos)
1668 : { return this->replace(__pos1, size_type(0), __str._M_data()
1669 : + __str._M_check(__pos2, "basic_string::insert"),
1670 : __str._M_limit(__pos2, __n)); }
1671 :
1672 : /**
1673 : * @brief Insert a C substring.
1674 : * @param __pos Iterator referencing location in string to insert at.
1675 : * @param __s The C string to insert.
1676 : * @param __n The number of characters to insert.
1677 : * @return Reference to this string.
1678 : * @throw std::length_error If new length exceeds @c max_size().
1679 : * @throw std::out_of_range If @a __pos is beyond the end of this
1680 : * string.
1681 : *
1682 : * Inserts the first @a __n characters of @a __s starting at @a
1683 : * __pos. If adding characters causes the length to exceed
1684 : * max_size(), length_error is thrown. If @a __pos is beyond
1685 : * end(), out_of_range is thrown. The value of the string
1686 : * doesn't change if an error is thrown.
1687 : */
1688 : basic_string&
1689 : insert(size_type __pos, const _CharT* __s, size_type __n)
1690 : { return this->replace(__pos, size_type(0), __s, __n); }
1691 :
1692 : /**
1693 : * @brief Insert a C string.
1694 : * @param __pos Iterator referencing location in string to insert at.
1695 : * @param __s The C string to insert.
1696 : * @return Reference to this string.
1697 : * @throw std::length_error If new length exceeds @c max_size().
1698 : * @throw std::out_of_range If @a pos is beyond the end of this
1699 : * string.
1700 : *
1701 : * Inserts the first @a n characters of @a __s starting at @a __pos. If
1702 : * adding characters causes the length to exceed max_size(),
1703 : * length_error is thrown. If @a __pos is beyond end(), out_of_range is
1704 : * thrown. The value of the string doesn't change if an error is
1705 : * thrown.
1706 : */
1707 : basic_string&
1708 : insert(size_type __pos, const _CharT* __s)
1709 : {
1710 : __glibcxx_requires_string(__s);
1711 : return this->replace(__pos, size_type(0), __s,
1712 : traits_type::length(__s));
1713 : }
1714 :
1715 : /**
1716 : * @brief Insert multiple characters.
1717 : * @param __pos Index in string to insert at.
1718 : * @param __n Number of characters to insert
1719 : * @param __c The character to insert.
1720 : * @return Reference to this string.
1721 : * @throw std::length_error If new length exceeds @c max_size().
1722 : * @throw std::out_of_range If @a __pos is beyond the end of this
1723 : * string.
1724 : *
1725 : * Inserts @a __n copies of character @a __c starting at index
1726 : * @a __pos. If adding characters causes the length to exceed
1727 : * max_size(), length_error is thrown. If @a __pos > length(),
1728 : * out_of_range is thrown. The value of the string doesn't
1729 : * change if an error is thrown.
1730 : */
1731 : basic_string&
1732 : insert(size_type __pos, size_type __n, _CharT __c)
1733 : { return _M_replace_aux(_M_check(__pos, "basic_string::insert"),
1734 : size_type(0), __n, __c); }
1735 :
1736 : /**
1737 : * @brief Insert one character.
1738 : * @param __p Iterator referencing position in string to insert at.
1739 : * @param __c The character to insert.
1740 : * @return Iterator referencing newly inserted char.
1741 : * @throw std::length_error If new length exceeds @c max_size().
1742 : *
1743 : * Inserts character @a __c at position referenced by @a __p.
1744 : * If adding character causes the length to exceed max_size(),
1745 : * length_error is thrown. If @a __p is beyond end of string,
1746 : * out_of_range is thrown. The value of the string doesn't
1747 : * change if an error is thrown.
1748 : */
1749 : iterator
1750 : insert(__const_iterator __p, _CharT __c)
1751 : {
1752 : _GLIBCXX_DEBUG_PEDASSERT(__p >= begin() && __p <= end());
1753 : const size_type __pos = __p - begin();
1754 : _M_replace_aux(__pos, size_type(0), size_type(1), __c);
1755 : return iterator(_M_data() + __pos);
1756 : }
1757 :
1758 : #if __cplusplus >= 201703L
1759 : /**
1760 : * @brief Insert a string_view.
1761 : * @param __pos Iterator referencing position in string to insert at.
1762 : * @param __svt The object convertible to string_view to insert.
1763 : * @return Reference to this string.
1764 : */
1765 : template<typename _Tp>
1766 : _If_sv<_Tp, basic_string&>
1767 : insert(size_type __pos, const _Tp& __svt)
1768 : {
1769 : __sv_type __sv = __svt;
1770 : return this->insert(__pos, __sv.data(), __sv.size());
1771 : }
1772 :
1773 : /**
1774 : * @brief Insert a string_view.
1775 : * @param __pos Iterator referencing position in string to insert at.
1776 : * @param __svt The object convertible to string_view to insert from.
1777 : * @param __pos Iterator referencing position in string_view to insert
1778 : * from.
1779 : * @param __n The number of characters to insert.
1780 : * @return Reference to this string.
1781 : */
1782 : template<typename _Tp>
1783 : _If_sv<_Tp, basic_string&>
1784 : insert(size_type __pos1, const _Tp& __svt,
1785 : size_type __pos2, size_type __n = npos)
1786 : {
1787 : __sv_type __sv = __svt;
1788 : return this->replace(__pos1, size_type(0),
1789 : __sv.data()
1790 : + std::__sv_check(__sv.size(), __pos2, "basic_string::insert"),
1791 : std::__sv_limit(__sv.size(), __pos2, __n));
1792 : }
1793 : #endif // C++17
1794 :
1795 : /**
1796 : * @brief Remove characters.
1797 : * @param __pos Index of first character to remove (default 0).
1798 : * @param __n Number of characters to remove (default remainder).
1799 : * @return Reference to this string.
1800 : * @throw std::out_of_range If @a pos is beyond the end of this
1801 : * string.
1802 : *
1803 : * Removes @a __n characters from this string starting at @a
1804 : * __pos. The length of the string is reduced by @a __n. If
1805 : * there are < @a __n characters to remove, the remainder of
1806 : * the string is truncated. If @a __p is beyond end of string,
1807 : * out_of_range is thrown. The value of the string doesn't
1808 : * change if an error is thrown.
1809 : */
1810 : basic_string&
1811 : erase(size_type __pos = 0, size_type __n = npos)
1812 : {
1813 : _M_check(__pos, "basic_string::erase");
1814 : if (__n == npos)
1815 : this->_M_set_length(__pos);
1816 : else if (__n != 0)
1817 : this->_M_erase(__pos, _M_limit(__pos, __n));
1818 : return *this;
1819 : }
1820 :
1821 : /**
1822 : * @brief Remove one character.
1823 : * @param __position Iterator referencing the character to remove.
1824 : * @return iterator referencing same location after removal.
1825 : *
1826 : * Removes the character at @a __position from this string. The value
1827 : * of the string doesn't change if an error is thrown.
1828 : */
1829 : iterator
1830 0 : erase(__const_iterator __position)
1831 : {
1832 : _GLIBCXX_DEBUG_PEDASSERT(__position >= begin()
1833 : && __position < end());
1834 0 : const size_type __pos = __position - begin();
1835 0 : this->_M_erase(__pos, size_type(1));
1836 0 : return iterator(_M_data() + __pos);
1837 : }
1838 :
1839 : /**
1840 : * @brief Remove a range of characters.
1841 : * @param __first Iterator referencing the first character to remove.
1842 : * @param __last Iterator referencing the end of the range.
1843 : * @return Iterator referencing location of first after removal.
1844 : *
1845 : * Removes the characters in the range [first,last) from this string.
1846 : * The value of the string doesn't change if an error is thrown.
1847 : */
1848 : iterator
1849 : erase(__const_iterator __first, __const_iterator __last)
1850 : {
1851 : _GLIBCXX_DEBUG_PEDASSERT(__first >= begin() && __first <= __last
1852 : && __last <= end());
1853 : const size_type __pos = __first - begin();
1854 : if (__last == end())
1855 : this->_M_set_length(__pos);
1856 : else
1857 : this->_M_erase(__pos, __last - __first);
1858 : return iterator(this->_M_data() + __pos);
1859 : }
1860 :
1861 : #if __cplusplus >= 201103L
1862 : /**
1863 : * @brief Remove the last character.
1864 : *
1865 : * The string must be non-empty.
1866 : */
1867 : void
1868 1 : pop_back() noexcept
1869 : {
1870 : __glibcxx_assert(!empty());
1871 1 : _M_erase(size() - 1, 1);
1872 : }
1873 : #endif // C++11
1874 :
1875 : /**
1876 : * @brief Replace characters with value from another string.
1877 : * @param __pos Index of first character to replace.
1878 : * @param __n Number of characters to be replaced.
1879 : * @param __str String to insert.
1880 : * @return Reference to this string.
1881 : * @throw std::out_of_range If @a pos is beyond the end of this
1882 : * string.
1883 : * @throw std::length_error If new length exceeds @c max_size().
1884 : *
1885 : * Removes the characters in the range [__pos,__pos+__n) from
1886 : * this string. In place, the value of @a __str is inserted.
1887 : * If @a __pos is beyond end of string, out_of_range is thrown.
1888 : * If the length of the result exceeds max_size(), length_error
1889 : * is thrown. The value of the string doesn't change if an
1890 : * error is thrown.
1891 : */
1892 : basic_string&
1893 13239 : replace(size_type __pos, size_type __n, const basic_string& __str)
1894 13239 : { return this->replace(__pos, __n, __str._M_data(), __str.size()); }
1895 :
1896 : /**
1897 : * @brief Replace characters with value from another string.
1898 : * @param __pos1 Index of first character to replace.
1899 : * @param __n1 Number of characters to be replaced.
1900 : * @param __str String to insert.
1901 : * @param __pos2 Index of first character of str to use.
1902 : * @param __n2 Number of characters from str to use.
1903 : * @return Reference to this string.
1904 : * @throw std::out_of_range If @a __pos1 > size() or @a __pos2 >
1905 : * __str.size().
1906 : * @throw std::length_error If new length exceeds @c max_size().
1907 : *
1908 : * Removes the characters in the range [__pos1,__pos1 + n) from this
1909 : * string. In place, the value of @a __str is inserted. If @a __pos is
1910 : * beyond end of string, out_of_range is thrown. If the length of the
1911 : * result exceeds max_size(), length_error is thrown. The value of the
1912 : * string doesn't change if an error is thrown.
1913 : */
1914 : basic_string&
1915 : replace(size_type __pos1, size_type __n1, const basic_string& __str,
1916 : size_type __pos2, size_type __n2 = npos)
1917 : { return this->replace(__pos1, __n1, __str._M_data()
1918 : + __str._M_check(__pos2, "basic_string::replace"),
1919 : __str._M_limit(__pos2, __n2)); }
1920 :
1921 : /**
1922 : * @brief Replace characters with value of a C substring.
1923 : * @param __pos Index of first character to replace.
1924 : * @param __n1 Number of characters to be replaced.
1925 : * @param __s C string to insert.
1926 : * @param __n2 Number of characters from @a s to use.
1927 : * @return Reference to this string.
1928 : * @throw std::out_of_range If @a pos1 > size().
1929 : * @throw std::length_error If new length exceeds @c max_size().
1930 : *
1931 : * Removes the characters in the range [__pos,__pos + __n1)
1932 : * from this string. In place, the first @a __n2 characters of
1933 : * @a __s are inserted, or all of @a __s if @a __n2 is too large. If
1934 : * @a __pos is beyond end of string, out_of_range is thrown. If
1935 : * the length of result exceeds max_size(), length_error is
1936 : * thrown. The value of the string doesn't change if an error
1937 : * is thrown.
1938 : */
1939 : basic_string&
1940 : replace(size_type __pos, size_type __n1, const _CharT* __s,
1941 : size_type __n2)
1942 : {
1943 : __glibcxx_requires_string_len(__s, __n2);
1944 : return _M_replace(_M_check(__pos, "basic_string::replace"),
1945 : _M_limit(__pos, __n1), __s, __n2);
1946 : }
1947 :
1948 : /**
1949 : * @brief Replace characters with value of a C string.
1950 : * @param __pos Index of first character to replace.
1951 : * @param __n1 Number of characters to be replaced.
1952 : * @param __s C string to insert.
1953 : * @return Reference to this string.
1954 : * @throw std::out_of_range If @a pos > size().
1955 : * @throw std::length_error If new length exceeds @c max_size().
1956 : *
1957 : * Removes the characters in the range [__pos,__pos + __n1)
1958 : * from this string. In place, the characters of @a __s are
1959 : * inserted. If @a __pos is beyond end of string, out_of_range
1960 : * is thrown. If the length of result exceeds max_size(),
1961 : * length_error is thrown. The value of the string doesn't
1962 : * change if an error is thrown.
1963 : */
1964 : basic_string&
1965 0 : replace(size_type __pos, size_type __n1, const _CharT* __s)
1966 : {
1967 : __glibcxx_requires_string(__s);
1968 0 : return this->replace(__pos, __n1, __s, traits_type::length(__s));
1969 : }
1970 :
1971 : /**
1972 : * @brief Replace characters with multiple characters.
1973 : * @param __pos Index of first character to replace.
1974 : * @param __n1 Number of characters to be replaced.
1975 : * @param __n2 Number of characters to insert.
1976 : * @param __c Character to insert.
1977 : * @return Reference to this string.
1978 : * @throw std::out_of_range If @a __pos > size().
1979 : * @throw std::length_error If new length exceeds @c max_size().
1980 : *
1981 : * Removes the characters in the range [pos,pos + n1) from this
1982 : * string. In place, @a __n2 copies of @a __c are inserted.
1983 : * If @a __pos is beyond end of string, out_of_range is thrown.
1984 : * If the length of result exceeds max_size(), length_error is
1985 : * thrown. The value of the string doesn't change if an error
1986 : * is thrown.
1987 : */
1988 : basic_string&
1989 : replace(size_type __pos, size_type __n1, size_type __n2, _CharT __c)
1990 : { return _M_replace_aux(_M_check(__pos, "basic_string::replace"),
1991 : _M_limit(__pos, __n1), __n2, __c); }
1992 :
1993 : /**
1994 : * @brief Replace range of characters with string.
1995 : * @param __i1 Iterator referencing start of range to replace.
1996 : * @param __i2 Iterator referencing end of range to replace.
1997 : * @param __str String value to insert.
1998 : * @return Reference to this string.
1999 : * @throw std::length_error If new length exceeds @c max_size().
2000 : *
2001 : * Removes the characters in the range [__i1,__i2). In place,
2002 : * the value of @a __str is inserted. If the length of result
2003 : * exceeds max_size(), length_error is thrown. The value of
2004 : * the string doesn't change if an error is thrown.
2005 : */
2006 : basic_string&
2007 : replace(__const_iterator __i1, __const_iterator __i2,
2008 : const basic_string& __str)
2009 : { return this->replace(__i1, __i2, __str._M_data(), __str.size()); }
2010 :
2011 : /**
2012 : * @brief Replace range of characters with C substring.
2013 : * @param __i1 Iterator referencing start of range to replace.
2014 : * @param __i2 Iterator referencing end of range to replace.
2015 : * @param __s C string value to insert.
2016 : * @param __n Number of characters from s to insert.
2017 : * @return Reference to this string.
2018 : * @throw std::length_error If new length exceeds @c max_size().
2019 : *
2020 : * Removes the characters in the range [__i1,__i2). In place,
2021 : * the first @a __n characters of @a __s are inserted. If the
2022 : * length of result exceeds max_size(), length_error is thrown.
2023 : * The value of the string doesn't change if an error is
2024 : * thrown.
2025 : */
2026 : basic_string&
2027 : replace(__const_iterator __i1, __const_iterator __i2,
2028 : const _CharT* __s, size_type __n)
2029 : {
2030 : _GLIBCXX_DEBUG_PEDASSERT(begin() <= __i1 && __i1 <= __i2
2031 : && __i2 <= end());
2032 : return this->replace(__i1 - begin(), __i2 - __i1, __s, __n);
2033 : }
2034 :
2035 : /**
2036 : * @brief Replace range of characters with C string.
2037 : * @param __i1 Iterator referencing start of range to replace.
2038 : * @param __i2 Iterator referencing end of range to replace.
2039 : * @param __s C string value to insert.
2040 : * @return Reference to this string.
2041 : * @throw std::length_error If new length exceeds @c max_size().
2042 : *
2043 : * Removes the characters in the range [__i1,__i2). In place,
2044 : * the characters of @a __s are inserted. If the length of
2045 : * result exceeds max_size(), length_error is thrown. The
2046 : * value of the string doesn't change if an error is thrown.
2047 : */
2048 : basic_string&
2049 : replace(__const_iterator __i1, __const_iterator __i2, const _CharT* __s)
2050 : {
2051 : __glibcxx_requires_string(__s);
2052 : return this->replace(__i1, __i2, __s, traits_type::length(__s));
2053 : }
2054 :
2055 : /**
2056 : * @brief Replace range of characters with multiple characters
2057 : * @param __i1 Iterator referencing start of range to replace.
2058 : * @param __i2 Iterator referencing end of range to replace.
2059 : * @param __n Number of characters to insert.
2060 : * @param __c Character to insert.
2061 : * @return Reference to this string.
2062 : * @throw std::length_error If new length exceeds @c max_size().
2063 : *
2064 : * Removes the characters in the range [__i1,__i2). In place,
2065 : * @a __n copies of @a __c are inserted. If the length of
2066 : * result exceeds max_size(), length_error is thrown. The
2067 : * value of the string doesn't change if an error is thrown.
2068 : */
2069 : basic_string&
2070 : replace(__const_iterator __i1, __const_iterator __i2, size_type __n,
2071 : _CharT __c)
2072 : {
2073 : _GLIBCXX_DEBUG_PEDASSERT(begin() <= __i1 && __i1 <= __i2
2074 : && __i2 <= end());
2075 : return _M_replace_aux(__i1 - begin(), __i2 - __i1, __n, __c);
2076 : }
2077 :
2078 : /**
2079 : * @brief Replace range of characters with range.
2080 : * @param __i1 Iterator referencing start of range to replace.
2081 : * @param __i2 Iterator referencing end of range to replace.
2082 : * @param __k1 Iterator referencing start of range to insert.
2083 : * @param __k2 Iterator referencing end of range to insert.
2084 : * @return Reference to this string.
2085 : * @throw std::length_error If new length exceeds @c max_size().
2086 : *
2087 : * Removes the characters in the range [__i1,__i2). In place,
2088 : * characters in the range [__k1,__k2) are inserted. If the
2089 : * length of result exceeds max_size(), length_error is thrown.
2090 : * The value of the string doesn't change if an error is
2091 : * thrown.
2092 : */
2093 : #if __cplusplus >= 201103L
2094 : template<class _InputIterator,
2095 : typename = std::_RequireInputIter<_InputIterator>>
2096 : basic_string&
2097 0 : replace(const_iterator __i1, const_iterator __i2,
2098 : _InputIterator __k1, _InputIterator __k2)
2099 : {
2100 : _GLIBCXX_DEBUG_PEDASSERT(begin() <= __i1 && __i1 <= __i2
2101 : && __i2 <= end());
2102 : __glibcxx_requires_valid_range(__k1, __k2);
2103 : return this->_M_replace_dispatch(__i1, __i2, __k1, __k2,
2104 0 : std::__false_type());
2105 : }
2106 : #else
2107 : template<class _InputIterator>
2108 : #ifdef _GLIBCXX_DISAMBIGUATE_REPLACE_INST
2109 : typename __enable_if_not_native_iterator<_InputIterator>::__type
2110 : #else
2111 : basic_string&
2112 : #endif
2113 : replace(iterator __i1, 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 : typedef typename std::__is_integer<_InputIterator>::__type _Integral;
2120 : return _M_replace_dispatch(__i1, __i2, __k1, __k2, _Integral());
2121 : }
2122 : #endif
2123 :
2124 : // Specializations for the common case of pointer and iterator:
2125 : // useful to avoid the overhead of temporary buffering in _M_replace.
2126 : basic_string&
2127 : replace(__const_iterator __i1, __const_iterator __i2,
2128 : _CharT* __k1, _CharT* __k2)
2129 : {
2130 : _GLIBCXX_DEBUG_PEDASSERT(begin() <= __i1 && __i1 <= __i2
2131 : && __i2 <= end());
2132 : __glibcxx_requires_valid_range(__k1, __k2);
2133 : return this->replace(__i1 - begin(), __i2 - __i1,
2134 : __k1, __k2 - __k1);
2135 : }
2136 :
2137 : basic_string&
2138 1782 : replace(__const_iterator __i1, __const_iterator __i2,
2139 : const _CharT* __k1, const _CharT* __k2)
2140 : {
2141 : _GLIBCXX_DEBUG_PEDASSERT(begin() <= __i1 && __i1 <= __i2
2142 : && __i2 <= end());
2143 : __glibcxx_requires_valid_range(__k1, __k2);
2144 1782 : return this->replace(__i1 - begin(), __i2 - __i1,
2145 1782 : __k1, __k2 - __k1);
2146 : }
2147 :
2148 : basic_string&
2149 : replace(__const_iterator __i1, __const_iterator __i2,
2150 : iterator __k1, iterator __k2)
2151 : {
2152 : _GLIBCXX_DEBUG_PEDASSERT(begin() <= __i1 && __i1 <= __i2
2153 : && __i2 <= end());
2154 : __glibcxx_requires_valid_range(__k1, __k2);
2155 : return this->replace(__i1 - begin(), __i2 - __i1,
2156 : __k1.base(), __k2 - __k1);
2157 : }
2158 :
2159 : basic_string&
2160 0 : replace(__const_iterator __i1, __const_iterator __i2,
2161 : const_iterator __k1, const_iterator __k2)
2162 : {
2163 : _GLIBCXX_DEBUG_PEDASSERT(begin() <= __i1 && __i1 <= __i2
2164 : && __i2 <= end());
2165 : __glibcxx_requires_valid_range(__k1, __k2);
2166 0 : return this->replace(__i1 - begin(), __i2 - __i1,
2167 0 : __k1.base(), __k2 - __k1);
2168 : }
2169 :
2170 : #if __cplusplus >= 201103L
2171 : /**
2172 : * @brief Replace range of characters with initializer_list.
2173 : * @param __i1 Iterator referencing start of range to replace.
2174 : * @param __i2 Iterator referencing end of range to replace.
2175 : * @param __l The initializer_list of characters to insert.
2176 : * @return Reference to this string.
2177 : * @throw std::length_error If new length exceeds @c max_size().
2178 : *
2179 : * Removes the characters in the range [__i1,__i2). In place,
2180 : * characters in the range [__k1,__k2) are inserted. If the
2181 : * length of result exceeds max_size(), length_error is thrown.
2182 : * The value of the string doesn't change if an error is
2183 : * thrown.
2184 : */
2185 : basic_string& replace(const_iterator __i1, const_iterator __i2,
2186 : initializer_list<_CharT> __l)
2187 : { return this->replace(__i1, __i2, __l.begin(), __l.size()); }
2188 : #endif // C++11
2189 :
2190 : #if __cplusplus >= 201703L
2191 : /**
2192 : * @brief Replace range of characters with string_view.
2193 : * @param __pos The position to replace at.
2194 : * @param __n The number of characters to replace.
2195 : * @param __svt The object convertible to string_view to insert.
2196 : * @return Reference to this string.
2197 : */
2198 : template<typename _Tp>
2199 : _If_sv<_Tp, basic_string&>
2200 : replace(size_type __pos, size_type __n, const _Tp& __svt)
2201 : {
2202 : __sv_type __sv = __svt;
2203 : return this->replace(__pos, __n, __sv.data(), __sv.size());
2204 : }
2205 :
2206 : /**
2207 : * @brief Replace range of characters with string_view.
2208 : * @param __pos1 The position to replace at.
2209 : * @param __n1 The number of characters to replace.
2210 : * @param __svt The object convertible to string_view to insert from.
2211 : * @param __pos2 The position in the string_view to insert from.
2212 : * @param __n2 The number of characters to insert.
2213 : * @return Reference to this string.
2214 : */
2215 : template<typename _Tp>
2216 : _If_sv<_Tp, basic_string&>
2217 : replace(size_type __pos1, size_type __n1, const _Tp& __svt,
2218 : size_type __pos2, size_type __n2 = npos)
2219 : {
2220 : __sv_type __sv = __svt;
2221 : return this->replace(__pos1, __n1,
2222 : __sv.data()
2223 : + std::__sv_check(__sv.size(), __pos2, "basic_string::replace"),
2224 : std::__sv_limit(__sv.size(), __pos2, __n2));
2225 : }
2226 :
2227 : /**
2228 : * @brief Replace range of characters with string_view.
2229 : * @param __i1 An iterator referencing the start position
2230 : to replace at.
2231 : * @param __i2 An iterator referencing the end position
2232 : for the replace.
2233 : * @param __svt The object convertible to string_view to insert from.
2234 : * @return Reference to this string.
2235 : */
2236 : template<typename _Tp>
2237 : _If_sv<_Tp, basic_string&>
2238 : replace(const_iterator __i1, const_iterator __i2, const _Tp& __svt)
2239 : {
2240 : __sv_type __sv = __svt;
2241 : return this->replace(__i1 - begin(), __i2 - __i1, __sv);
2242 : }
2243 : #endif // C++17
2244 :
2245 : private:
2246 : template<class _Integer>
2247 : basic_string&
2248 : _M_replace_dispatch(const_iterator __i1, const_iterator __i2,
2249 : _Integer __n, _Integer __val, __true_type)
2250 : { return _M_replace_aux(__i1 - begin(), __i2 - __i1, __n, __val); }
2251 :
2252 : template<class _InputIterator>
2253 : basic_string&
2254 : _M_replace_dispatch(const_iterator __i1, const_iterator __i2,
2255 : _InputIterator __k1, _InputIterator __k2,
2256 : __false_type);
2257 :
2258 : basic_string&
2259 : _M_replace_aux(size_type __pos1, size_type __n1, size_type __n2,
2260 : _CharT __c);
2261 :
2262 : basic_string&
2263 : _M_replace(size_type __pos, size_type __len1, const _CharT* __s,
2264 : const size_type __len2);
2265 :
2266 : basic_string&
2267 : _M_append(const _CharT* __s, size_type __n);
2268 :
2269 : public:
2270 :
2271 : /**
2272 : * @brief Copy substring into C string.
2273 : * @param __s C string to copy value into.
2274 : * @param __n Number of characters to copy.
2275 : * @param __pos Index of first character to copy.
2276 : * @return Number of characters actually copied
2277 : * @throw std::out_of_range If __pos > size().
2278 : *
2279 : * Copies up to @a __n characters starting at @a __pos into the
2280 : * C string @a __s. If @a __pos is %greater than size(),
2281 : * out_of_range is thrown.
2282 : */
2283 : size_type
2284 : copy(_CharT* __s, size_type __n, size_type __pos = 0) const;
2285 :
2286 : /**
2287 : * @brief Swap contents with another string.
2288 : * @param __s String to swap with.
2289 : *
2290 : * Exchanges the contents of this string with that of @a __s in constant
2291 : * time.
2292 : */
2293 : void
2294 : swap(basic_string& __s) _GLIBCXX_NOEXCEPT;
2295 :
2296 : // String operations:
2297 : /**
2298 : * @brief Return const pointer to null-terminated contents.
2299 : *
2300 : * This is a handle to internal data. Do not modify or dire things may
2301 : * happen.
2302 : */
2303 : const _CharT*
2304 96219496 : c_str() const _GLIBCXX_NOEXCEPT
2305 14985837 : { return _M_data(); }
2306 :
2307 : /**
2308 : * @brief Return const pointer to contents.
2309 : *
2310 : * This is a pointer to internal data. It is undefined to modify
2311 : * the contents through the returned pointer. To get a pointer that
2312 : * allows modifying the contents use @c &str[0] instead,
2313 : * (or in C++17 the non-const @c str.data() overload).
2314 : */
2315 : const _CharT*
2316 208102698 : data() const _GLIBCXX_NOEXCEPT
2317 208102697 : { return _M_data(); }
2318 :
2319 : #if __cplusplus >= 201703L
2320 : /**
2321 : * @brief Return non-const pointer to contents.
2322 : *
2323 : * This is a pointer to the character sequence held by the string.
2324 : * Modifying the characters in the sequence is allowed.
2325 : */
2326 : _CharT*
2327 : data() noexcept
2328 : { return _M_data(); }
2329 : #endif
2330 :
2331 : /**
2332 : * @brief Return copy of allocator used to construct this string.
2333 : */
2334 : allocator_type
2335 : get_allocator() const _GLIBCXX_NOEXCEPT
2336 : { return _M_get_allocator(); }
2337 :
2338 : /**
2339 : * @brief Find position of a C substring.
2340 : * @param __s C string to locate.
2341 : * @param __pos Index of character to search from.
2342 : * @param __n Number of characters from @a s to search for.
2343 : * @return Index of start of first occurrence.
2344 : *
2345 : * Starting from @a __pos, searches forward for the first @a
2346 : * __n characters in @a __s within this string. If found,
2347 : * returns the index where it begins. If not found, returns
2348 : * npos.
2349 : */
2350 : size_type
2351 : find(const _CharT* __s, size_type __pos, size_type __n) const
2352 : _GLIBCXX_NOEXCEPT;
2353 :
2354 : /**
2355 : * @brief Find position of a string.
2356 : * @param __str String to locate.
2357 : * @param __pos Index of character to search from (default 0).
2358 : * @return Index of start of first occurrence.
2359 : *
2360 : * Starting from @a __pos, searches forward for value of @a __str within
2361 : * this string. If found, returns the index where it begins. If not
2362 : * found, returns npos.
2363 : */
2364 : size_type
2365 55709435 : find(const basic_string& __str, size_type __pos = 0) const
2366 : _GLIBCXX_NOEXCEPT
2367 55709435 : { return this->find(__str.data(), __pos, __str.size()); }
2368 :
2369 : #if __cplusplus >= 201703L
2370 : /**
2371 : * @brief Find position of a string_view.
2372 : * @param __svt The object convertible to string_view to locate.
2373 : * @param __pos Index of character to search from (default 0).
2374 : * @return Index of start of first occurrence.
2375 : */
2376 : template<typename _Tp>
2377 : _If_sv<_Tp, size_type>
2378 : find(const _Tp& __svt, size_type __pos = 0) const
2379 : noexcept(is_same<_Tp, __sv_type>::value)
2380 : {
2381 : __sv_type __sv = __svt;
2382 : return this->find(__sv.data(), __pos, __sv.size());
2383 : }
2384 : #endif // C++17
2385 :
2386 : /**
2387 : * @brief Find position of a C string.
2388 : * @param __s C string to locate.
2389 : * @param __pos Index of character to search from (default 0).
2390 : * @return Index of start of first occurrence.
2391 : *
2392 : * Starting from @a __pos, searches forward for the value of @a
2393 : * __s within this string. If found, returns the index where
2394 : * it begins. If not found, returns npos.
2395 : */
2396 : size_type
2397 14092241 : find(const _CharT* __s, size_type __pos = 0) const _GLIBCXX_NOEXCEPT
2398 : {
2399 : __glibcxx_requires_string(__s);
2400 14092241 : return this->find(__s, __pos, traits_type::length(__s));
2401 : }
2402 :
2403 : /**
2404 : * @brief Find position of a character.
2405 : * @param __c Character to locate.
2406 : * @param __pos Index of character to search from (default 0).
2407 : * @return Index of first occurrence.
2408 : *
2409 : * Starting from @a __pos, searches forward for @a __c within
2410 : * this string. If found, returns the index where it was
2411 : * found. If not found, returns npos.
2412 : */
2413 : size_type
2414 : find(_CharT __c, size_type __pos = 0) const _GLIBCXX_NOEXCEPT;
2415 :
2416 : /**
2417 : * @brief Find last position of a string.
2418 : * @param __str String to locate.
2419 : * @param __pos Index of character to search back from (default end).
2420 : * @return Index of start of last occurrence.
2421 : *
2422 : * Starting from @a __pos, searches backward for value of @a
2423 : * __str within this string. If found, returns the index where
2424 : * it begins. If not found, returns npos.
2425 : */
2426 : size_type
2427 0 : rfind(const basic_string& __str, size_type __pos = npos) const
2428 : _GLIBCXX_NOEXCEPT
2429 0 : { return this->rfind(__str.data(), __pos, __str.size()); }
2430 :
2431 : #if __cplusplus >= 201703L
2432 : /**
2433 : * @brief Find last position of a string_view.
2434 : * @param __svt The object convertible to string_view to locate.
2435 : * @param __pos Index of character to search back from (default end).
2436 : * @return Index of start of last occurrence.
2437 : */
2438 : template<typename _Tp>
2439 : _If_sv<_Tp, size_type>
2440 : rfind(const _Tp& __svt, size_type __pos = npos) const
2441 : noexcept(is_same<_Tp, __sv_type>::value)
2442 : {
2443 : __sv_type __sv = __svt;
2444 : return this->rfind(__sv.data(), __pos, __sv.size());
2445 : }
2446 : #endif // C++17
2447 :
2448 : /**
2449 : * @brief Find last position of a C substring.
2450 : * @param __s C string to locate.
2451 : * @param __pos Index of character to search back from.
2452 : * @param __n Number of characters from s to search for.
2453 : * @return Index of start of last occurrence.
2454 : *
2455 : * Starting from @a __pos, searches backward for the first @a
2456 : * __n characters in @a __s within this string. If found,
2457 : * returns the index where it begins. If not found, returns
2458 : * npos.
2459 : */
2460 : size_type
2461 : rfind(const _CharT* __s, size_type __pos, size_type __n) const
2462 : _GLIBCXX_NOEXCEPT;
2463 :
2464 : /**
2465 : * @brief Find last position of a C string.
2466 : * @param __s C string to locate.
2467 : * @param __pos Index of character to start search at (default end).
2468 : * @return Index of start of last occurrence.
2469 : *
2470 : * Starting from @a __pos, searches backward for the value of
2471 : * @a __s within this string. If found, returns the index
2472 : * where it begins. If not found, returns npos.
2473 : */
2474 : size_type
2475 350 : rfind(const _CharT* __s, size_type __pos = npos) const
2476 : {
2477 : __glibcxx_requires_string(__s);
2478 350 : return this->rfind(__s, __pos, traits_type::length(__s));
2479 : }
2480 :
2481 : /**
2482 : * @brief Find last position of a character.
2483 : * @param __c Character to locate.
2484 : * @param __pos Index of character to search back from (default end).
2485 : * @return Index of last occurrence.
2486 : *
2487 : * Starting from @a __pos, searches backward for @a __c within
2488 : * this string. If found, returns the index where it was
2489 : * found. If not found, returns npos.
2490 : */
2491 : size_type
2492 : rfind(_CharT __c, size_type __pos = npos) const _GLIBCXX_NOEXCEPT;
2493 :
2494 : /**
2495 : * @brief Find position of a character of string.
2496 : * @param __str String containing characters to locate.
2497 : * @param __pos Index of character to search from (default 0).
2498 : * @return Index of first occurrence.
2499 : *
2500 : * Starting from @a __pos, searches forward for one of the
2501 : * characters of @a __str within this string. If found,
2502 : * returns the index where it was found. If not found, returns
2503 : * npos.
2504 : */
2505 : size_type
2506 2981 : find_first_of(const basic_string& __str, size_type __pos = 0) const
2507 : _GLIBCXX_NOEXCEPT
2508 2981 : { return this->find_first_of(__str.data(), __pos, __str.size()); }
2509 :
2510 : #if __cplusplus >= 201703L
2511 : /**
2512 : * @brief Find position of a character of a string_view.
2513 : * @param __svt An object convertible to string_view containing
2514 : * characters to locate.
2515 : * @param __pos Index of character to search from (default 0).
2516 : * @return Index of first occurrence.
2517 : */
2518 : template<typename _Tp>
2519 : _If_sv<_Tp, size_type>
2520 : find_first_of(const _Tp& __svt, size_type __pos = 0) const
2521 : noexcept(is_same<_Tp, __sv_type>::value)
2522 : {
2523 : __sv_type __sv = __svt;
2524 : return this->find_first_of(__sv.data(), __pos, __sv.size());
2525 : }
2526 : #endif // C++17
2527 :
2528 : /**
2529 : * @brief Find position of a character of C substring.
2530 : * @param __s String containing characters to locate.
2531 : * @param __pos Index of character to search from.
2532 : * @param __n Number of characters from s to search for.
2533 : * @return Index of first occurrence.
2534 : *
2535 : * Starting from @a __pos, searches forward for one of the
2536 : * first @a __n characters of @a __s within this string. If
2537 : * found, returns the index where it was found. If not found,
2538 : * returns npos.
2539 : */
2540 : size_type
2541 : find_first_of(const _CharT* __s, size_type __pos, size_type __n) const
2542 : _GLIBCXX_NOEXCEPT;
2543 :
2544 : /**
2545 : * @brief Find position of a character of C string.
2546 : * @param __s String containing characters to locate.
2547 : * @param __pos Index of character to search from (default 0).
2548 : * @return Index of first occurrence.
2549 : *
2550 : * Starting from @a __pos, searches forward for one of the
2551 : * characters of @a __s within this string. If found, returns
2552 : * the index where it was found. If not found, returns npos.
2553 : */
2554 : size_type
2555 211 : find_first_of(const _CharT* __s, size_type __pos = 0) const
2556 : _GLIBCXX_NOEXCEPT
2557 : {
2558 : __glibcxx_requires_string(__s);
2559 211 : return this->find_first_of(__s, __pos, traits_type::length(__s));
2560 : }
2561 :
2562 : /**
2563 : * @brief Find position of a character.
2564 : * @param __c Character to locate.
2565 : * @param __pos Index of character to search from (default 0).
2566 : * @return Index of first occurrence.
2567 : *
2568 : * Starting from @a __pos, searches forward for the character
2569 : * @a __c within this string. If found, returns the index
2570 : * where it was found. If not found, returns npos.
2571 : *
2572 : * Note: equivalent to find(__c, __pos).
2573 : */
2574 : size_type
2575 0 : find_first_of(_CharT __c, size_type __pos = 0) const _GLIBCXX_NOEXCEPT
2576 0 : { return this->find(__c, __pos); }
2577 :
2578 : /**
2579 : * @brief Find last position of a character of string.
2580 : * @param __str String containing characters to locate.
2581 : * @param __pos Index of character to search back from (default end).
2582 : * @return Index of last occurrence.
2583 : *
2584 : * Starting from @a __pos, searches backward for one of the
2585 : * characters of @a __str within this string. If found,
2586 : * returns the index where it was found. If not found, returns
2587 : * npos.
2588 : */
2589 : size_type
2590 : find_last_of(const basic_string& __str, size_type __pos = npos) const
2591 : _GLIBCXX_NOEXCEPT
2592 : { return this->find_last_of(__str.data(), __pos, __str.size()); }
2593 :
2594 : #if __cplusplus >= 201703L
2595 : /**
2596 : * @brief Find last position of a character of string.
2597 : * @param __svt An object convertible to string_view containing
2598 : * characters to locate.
2599 : * @param __pos Index of character to search back from (default end).
2600 : * @return Index of last occurrence.
2601 : */
2602 : template<typename _Tp>
2603 : _If_sv<_Tp, size_type>
2604 : find_last_of(const _Tp& __svt, size_type __pos = npos) const
2605 : noexcept(is_same<_Tp, __sv_type>::value)
2606 : {
2607 : __sv_type __sv = __svt;
2608 : return this->find_last_of(__sv.data(), __pos, __sv.size());
2609 : }
2610 : #endif // C++17
2611 :
2612 : /**
2613 : * @brief Find last position of a character of C substring.
2614 : * @param __s C string containing characters to locate.
2615 : * @param __pos Index of character to search back from.
2616 : * @param __n Number of characters from s to search for.
2617 : * @return Index of last occurrence.
2618 : *
2619 : * Starting from @a __pos, searches backward for one of the
2620 : * first @a __n characters of @a __s within this string. If
2621 : * found, returns the index where it was found. If not found,
2622 : * returns npos.
2623 : */
2624 : size_type
2625 : find_last_of(const _CharT* __s, size_type __pos, size_type __n) const
2626 : _GLIBCXX_NOEXCEPT;
2627 :
2628 : /**
2629 : * @brief Find last position of a character of C string.
2630 : * @param __s C string containing characters to locate.
2631 : * @param __pos Index of character to search back from (default end).
2632 : * @return Index of last occurrence.
2633 : *
2634 : * Starting from @a __pos, searches backward for one of the
2635 : * characters of @a __s within this string. If found, returns
2636 : * the index where it was found. If not found, returns npos.
2637 : */
2638 : size_type
2639 0 : find_last_of(const _CharT* __s, size_type __pos = npos) const
2640 : _GLIBCXX_NOEXCEPT
2641 : {
2642 : __glibcxx_requires_string(__s);
2643 0 : return this->find_last_of(__s, __pos, traits_type::length(__s));
2644 : }
2645 :
2646 : /**
2647 : * @brief Find last position of a character.
2648 : * @param __c Character to locate.
2649 : * @param __pos Index of character to search back from (default end).
2650 : * @return Index of last occurrence.
2651 : *
2652 : * Starting from @a __pos, searches backward for @a __c within
2653 : * this string. If found, returns the index where it was
2654 : * found. If not found, returns npos.
2655 : *
2656 : * Note: equivalent to rfind(__c, __pos).
2657 : */
2658 : size_type
2659 : find_last_of(_CharT __c, size_type __pos = npos) const _GLIBCXX_NOEXCEPT
2660 : { return this->rfind(__c, __pos); }
2661 :
2662 : /**
2663 : * @brief Find position of a character not in string.
2664 : * @param __str String containing characters to avoid.
2665 : * @param __pos Index of character to search from (default 0).
2666 : * @return Index of first occurrence.
2667 : *
2668 : * Starting from @a __pos, searches forward for a character not contained
2669 : * in @a __str within this string. If found, returns the index where it
2670 : * was found. If not found, returns npos.
2671 : */
2672 : size_type
2673 0 : find_first_not_of(const basic_string& __str, size_type __pos = 0) const
2674 : _GLIBCXX_NOEXCEPT
2675 0 : { return this->find_first_not_of(__str.data(), __pos, __str.size()); }
2676 :
2677 : #if __cplusplus >= 201703L
2678 : /**
2679 : * @brief Find position of a character not in a string_view.
2680 : * @param __svt A object convertible to string_view containing
2681 : * characters to avoid.
2682 : * @param __pos Index of character to search from (default 0).
2683 : * @return Index of first occurrence.
2684 : */
2685 : template<typename _Tp>
2686 : _If_sv<_Tp, size_type>
2687 : find_first_not_of(const _Tp& __svt, size_type __pos = 0) const
2688 : noexcept(is_same<_Tp, __sv_type>::value)
2689 : {
2690 : __sv_type __sv = __svt;
2691 : return this->find_first_not_of(__sv.data(), __pos, __sv.size());
2692 : }
2693 : #endif // C++17
2694 :
2695 : /**
2696 : * @brief Find position of a character not in C substring.
2697 : * @param __s C string containing characters to avoid.
2698 : * @param __pos Index of character to search from.
2699 : * @param __n Number of characters from __s to consider.
2700 : * @return Index of first occurrence.
2701 : *
2702 : * Starting from @a __pos, searches forward for a character not
2703 : * contained in the first @a __n characters of @a __s within
2704 : * this string. If found, returns the index where it was
2705 : * found. If not found, returns npos.
2706 : */
2707 : size_type
2708 : find_first_not_of(const _CharT* __s, size_type __pos,
2709 : size_type __n) const _GLIBCXX_NOEXCEPT;
2710 :
2711 : /**
2712 : * @brief Find position of a character not in C string.
2713 : * @param __s C string containing characters to avoid.
2714 : * @param __pos Index of character to search from (default 0).
2715 : * @return Index of first occurrence.
2716 : *
2717 : * Starting from @a __pos, searches forward for a character not
2718 : * contained in @a __s within this string. If found, returns
2719 : * the index where it was found. If not found, returns npos.
2720 : */
2721 : size_type
2722 0 : find_first_not_of(const _CharT* __s, size_type __pos = 0) const
2723 : _GLIBCXX_NOEXCEPT
2724 : {
2725 : __glibcxx_requires_string(__s);
2726 0 : return this->find_first_not_of(__s, __pos, traits_type::length(__s));
2727 : }
2728 :
2729 : /**
2730 : * @brief Find position of a different character.
2731 : * @param __c Character to avoid.
2732 : * @param __pos Index of character to search from (default 0).
2733 : * @return Index of first occurrence.
2734 : *
2735 : * Starting from @a __pos, searches forward for a character
2736 : * other than @a __c within this string. If found, returns the
2737 : * index where it was found. If not found, returns npos.
2738 : */
2739 : size_type
2740 : find_first_not_of(_CharT __c, size_type __pos = 0) const
2741 : _GLIBCXX_NOEXCEPT;
2742 :
2743 : /**
2744 : * @brief Find last position of a character not in string.
2745 : * @param __str String containing characters to avoid.
2746 : * @param __pos Index of character to search back from (default end).
2747 : * @return Index of last occurrence.
2748 : *
2749 : * Starting from @a __pos, searches backward for a character
2750 : * not contained in @a __str within this string. If found,
2751 : * returns the index where it was found. If not found, returns
2752 : * npos.
2753 : */
2754 : size_type
2755 4 : find_last_not_of(const basic_string& __str, size_type __pos = npos) const
2756 : _GLIBCXX_NOEXCEPT
2757 4 : { return this->find_last_not_of(__str.data(), __pos, __str.size()); }
2758 :
2759 : #if __cplusplus >= 201703L
2760 : /**
2761 : * @brief Find last position of a character not in a string_view.
2762 : * @param __svt An object convertible to string_view containing
2763 : * characters to avoid.
2764 : * @param __pos Index of character to search back from (default end).
2765 : * @return Index of last occurrence.
2766 : */
2767 : template<typename _Tp>
2768 : _If_sv<_Tp, size_type>
2769 : find_last_not_of(const _Tp& __svt, size_type __pos = npos) const
2770 : noexcept(is_same<_Tp, __sv_type>::value)
2771 : {
2772 : __sv_type __sv = __svt;
2773 : return this->find_last_not_of(__sv.data(), __pos, __sv.size());
2774 : }
2775 : #endif // C++17
2776 :
2777 : /**
2778 : * @brief Find last position of a character not in C substring.
2779 : * @param __s C string containing characters to avoid.
2780 : * @param __pos Index of character to search back from.
2781 : * @param __n Number of characters from s to consider.
2782 : * @return Index of last occurrence.
2783 : *
2784 : * Starting from @a __pos, searches backward for a character not
2785 : * contained in the first @a __n characters of @a __s within this string.
2786 : * If found, returns the index where it was found. If not found,
2787 : * returns npos.
2788 : */
2789 : size_type
2790 : find_last_not_of(const _CharT* __s, size_type __pos,
2791 : size_type __n) const _GLIBCXX_NOEXCEPT;
2792 : /**
2793 : * @brief Find last position of a character not in C string.
2794 : * @param __s C string containing characters to avoid.
2795 : * @param __pos Index of character to search back from (default end).
2796 : * @return Index of last occurrence.
2797 : *
2798 : * Starting from @a __pos, searches backward for a character
2799 : * not contained in @a __s within this string. If found,
2800 : * returns the index where it was found. If not found, returns
2801 : * npos.
2802 : */
2803 : size_type
2804 0 : find_last_not_of(const _CharT* __s, size_type __pos = npos) const
2805 : _GLIBCXX_NOEXCEPT
2806 : {
2807 : __glibcxx_requires_string(__s);
2808 0 : return this->find_last_not_of(__s, __pos, traits_type::length(__s));
2809 : }
2810 :
2811 : /**
2812 : * @brief Find last position of a different character.
2813 : * @param __c Character to avoid.
2814 : * @param __pos Index of character to search back from (default end).
2815 : * @return Index of last occurrence.
2816 : *
2817 : * Starting from @a __pos, searches backward for a character other than
2818 : * @a __c within this string. If found, returns the index where it was
2819 : * found. If not found, returns npos.
2820 : */
2821 : size_type
2822 : find_last_not_of(_CharT __c, size_type __pos = npos) const
2823 : _GLIBCXX_NOEXCEPT;
2824 :
2825 : /**
2826 : * @brief Get a substring.
2827 : * @param __pos Index of first character (default 0).
2828 : * @param __n Number of characters in substring (default remainder).
2829 : * @return The new string.
2830 : * @throw std::out_of_range If __pos > size().
2831 : *
2832 : * Construct and return a new string using the @a __n
2833 : * characters starting at @a __pos. If the string is too
2834 : * short, use the remainder of the characters. If @a __pos is
2835 : * beyond the end of the string, out_of_range is thrown.
2836 : */
2837 : basic_string
2838 : substr(size_type __pos = 0, size_type __n = npos) const
2839 : { return basic_string(*this,
2840 : _M_check(__pos, "basic_string::substr"), __n); }
2841 :
2842 : /**
2843 : * @brief Compare to a string.
2844 : * @param __str String to compare against.
2845 : * @return Integer < 0, 0, or > 0.
2846 : *
2847 : * Returns an integer < 0 if this string is ordered before @a
2848 : * __str, 0 if their values are equivalent, or > 0 if this
2849 : * string is ordered after @a __str. Determines the effective
2850 : * length rlen of the strings to compare as the smallest of
2851 : * size() and str.size(). The function then compares the two
2852 : * strings by calling traits::compare(data(), str.data(),rlen).
2853 : * If the result of the comparison is nonzero returns it,
2854 : * otherwise the shorter one is ordered first.
2855 : */
2856 : int
2857 : compare(const basic_string& __str) const
2858 : {
2859 : const size_type __size = this->size();
2860 : const size_type __osize = __str.size();
2861 : const size_type __len = std::min(__size, __osize);
2862 :
2863 : int __r = traits_type::compare(_M_data(), __str.data(), __len);
2864 : if (!__r)
2865 : __r = _S_compare(__size, __osize);
2866 : return __r;
2867 : }
2868 :
2869 : #if __cplusplus >= 201703L
2870 : /**
2871 : * @brief Compare to a string_view.
2872 : * @param __svt An object convertible to string_view to compare against.
2873 : * @return Integer < 0, 0, or > 0.
2874 : */
2875 : template<typename _Tp>
2876 : _If_sv<_Tp, int>
2877 : compare(const _Tp& __svt) const
2878 : noexcept(is_same<_Tp, __sv_type>::value)
2879 : {
2880 : __sv_type __sv = __svt;
2881 : const size_type __size = this->size();
2882 : const size_type __osize = __sv.size();
2883 : const size_type __len = std::min(__size, __osize);
2884 :
2885 : int __r = traits_type::compare(_M_data(), __sv.data(), __len);
2886 : if (!__r)
2887 : __r = _S_compare(__size, __osize);
2888 : return __r;
2889 : }
2890 :
2891 : /**
2892 : * @brief Compare to a string_view.
2893 : * @param __pos A position in the string to start comparing from.
2894 : * @param __n The number of characters to compare.
2895 : * @param __svt An object convertible to string_view to compare
2896 : * against.
2897 : * @return Integer < 0, 0, or > 0.
2898 : */
2899 : template<typename _Tp>
2900 : _If_sv<_Tp, int>
2901 : compare(size_type __pos, size_type __n, const _Tp& __svt) const
2902 : noexcept(is_same<_Tp, __sv_type>::value)
2903 : {
2904 : __sv_type __sv = __svt;
2905 : return __sv_type(*this).substr(__pos, __n).compare(__sv);
2906 : }
2907 :
2908 : /**
2909 : * @brief Compare to a string_view.
2910 : * @param __pos1 A position in the string to start comparing from.
2911 : * @param __n1 The number of characters to compare.
2912 : * @param __svt An object convertible to string_view to compare
2913 : * against.
2914 : * @param __pos2 A position in the string_view to start comparing from.
2915 : * @param __n2 The number of characters to compare.
2916 : * @return Integer < 0, 0, or > 0.
2917 : */
2918 : template<typename _Tp>
2919 : _If_sv<_Tp, int>
2920 : compare(size_type __pos1, size_type __n1, const _Tp& __svt,
2921 : size_type __pos2, size_type __n2 = npos) const
2922 : noexcept(is_same<_Tp, __sv_type>::value)
2923 : {
2924 : __sv_type __sv = __svt;
2925 : return __sv_type(*this)
2926 : .substr(__pos1, __n1).compare(__sv.substr(__pos2, __n2));
2927 : }
2928 : #endif // C++17
2929 :
2930 : /**
2931 : * @brief Compare substring to a string.
2932 : * @param __pos Index of first character of substring.
2933 : * @param __n Number of characters in substring.
2934 : * @param __str String to compare against.
2935 : * @return Integer < 0, 0, or > 0.
2936 : *
2937 : * Form the substring of this string from the @a __n characters
2938 : * starting at @a __pos. Returns an integer < 0 if the
2939 : * substring is ordered before @a __str, 0 if their values are
2940 : * equivalent, or > 0 if the substring is ordered after @a
2941 : * __str. Determines the effective length rlen of the strings
2942 : * to compare as the smallest of the length of the substring
2943 : * and @a __str.size(). The function then compares the two
2944 : * strings by calling
2945 : * traits::compare(substring.data(),str.data(),rlen). If the
2946 : * result of the comparison is nonzero returns it, otherwise
2947 : * the shorter one is ordered first.
2948 : */
2949 : int
2950 : compare(size_type __pos, size_type __n, const basic_string& __str) const;
2951 :
2952 : /**
2953 : * @brief Compare substring to a substring.
2954 : * @param __pos1 Index of first character of substring.
2955 : * @param __n1 Number of characters in substring.
2956 : * @param __str String to compare against.
2957 : * @param __pos2 Index of first character of substring of str.
2958 : * @param __n2 Number of characters in substring of str.
2959 : * @return Integer < 0, 0, or > 0.
2960 : *
2961 : * Form the substring of this string from the @a __n1
2962 : * characters starting at @a __pos1. Form the substring of @a
2963 : * __str from the @a __n2 characters starting at @a __pos2.
2964 : * Returns an integer < 0 if this substring is ordered before
2965 : * the substring of @a __str, 0 if their values are equivalent,
2966 : * or > 0 if this substring is ordered after the substring of
2967 : * @a __str. Determines the effective length rlen of the
2968 : * strings to compare as the smallest of the lengths of the
2969 : * substrings. The function then compares the two strings by
2970 : * calling
2971 : * traits::compare(substring.data(),str.substr(pos2,n2).data(),rlen).
2972 : * If the result of the comparison is nonzero returns it,
2973 : * otherwise the shorter one is ordered first.
2974 : */
2975 : int
2976 : compare(size_type __pos1, size_type __n1, const basic_string& __str,
2977 : size_type __pos2, size_type __n2 = npos) const;
2978 :
2979 : /**
2980 : * @brief Compare to a C string.
2981 : * @param __s C string to compare against.
2982 : * @return Integer < 0, 0, or > 0.
2983 : *
2984 : * Returns an integer < 0 if this string is ordered before @a __s, 0 if
2985 : * their values are equivalent, or > 0 if this string is ordered after
2986 : * @a __s. Determines the effective length rlen of the strings to
2987 : * compare as the smallest of size() and the length of a string
2988 : * constructed from @a __s. The function then compares the two strings
2989 : * by calling traits::compare(data(),s,rlen). If the result of the
2990 : * comparison is nonzero returns it, otherwise the shorter one is
2991 : * ordered first.
2992 : */
2993 : int
2994 : compare(const _CharT* __s) const _GLIBCXX_NOEXCEPT;
2995 :
2996 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
2997 : // 5 String::compare specification questionable
2998 : /**
2999 : * @brief Compare substring to a C string.
3000 : * @param __pos Index of first character of substring.
3001 : * @param __n1 Number of characters in substring.
3002 : * @param __s C string to compare against.
3003 : * @return Integer < 0, 0, or > 0.
3004 : *
3005 : * Form the substring of this string from the @a __n1
3006 : * characters starting at @a pos. Returns an integer < 0 if
3007 : * the substring is ordered before @a __s, 0 if their values
3008 : * are equivalent, or > 0 if the substring is ordered after @a
3009 : * __s. Determines the effective length rlen of the strings to
3010 : * compare as the smallest of the length of the substring and
3011 : * the length of a string constructed from @a __s. The
3012 : * function then compares the two string by calling
3013 : * traits::compare(substring.data(),__s,rlen). If the result of
3014 : * the comparison is nonzero returns it, otherwise the shorter
3015 : * one is ordered first.
3016 : */
3017 : int
3018 : compare(size_type __pos, size_type __n1, const _CharT* __s) const;
3019 :
3020 : /**
3021 : * @brief Compare substring against a character %array.
3022 : * @param __pos Index of first character of substring.
3023 : * @param __n1 Number of characters in substring.
3024 : * @param __s character %array to compare against.
3025 : * @param __n2 Number of characters of s.
3026 : * @return Integer < 0, 0, or > 0.
3027 : *
3028 : * Form the substring of this string from the @a __n1
3029 : * characters starting at @a __pos. Form a string from the
3030 : * first @a __n2 characters of @a __s. Returns an integer < 0
3031 : * if this substring is ordered before the string from @a __s,
3032 : * 0 if their values are equivalent, or > 0 if this substring
3033 : * is ordered after the string from @a __s. Determines the
3034 : * effective length rlen of the strings to compare as the
3035 : * smallest of the length of the substring and @a __n2. The
3036 : * function then compares the two strings by calling
3037 : * traits::compare(substring.data(),s,rlen). If the result of
3038 : * the comparison is nonzero returns it, otherwise the shorter
3039 : * one is ordered first.
3040 : *
3041 : * NB: s must have at least n2 characters, '\\0' has
3042 : * no special meaning.
3043 : */
3044 : int
3045 : compare(size_type __pos, size_type __n1, const _CharT* __s,
3046 : size_type __n2) const;
3047 :
3048 : #if __cplusplus > 201703L
3049 : bool
3050 : starts_with(basic_string_view<_CharT, _Traits> __x) const noexcept
3051 : { return __sv_type(this->data(), this->size()).starts_with(__x); }
3052 :
3053 : bool
3054 : starts_with(_CharT __x) const noexcept
3055 : { return __sv_type(this->data(), this->size()).starts_with(__x); }
3056 :
3057 : bool
3058 : starts_with(const _CharT* __x) const noexcept
3059 : { return __sv_type(this->data(), this->size()).starts_with(__x); }
3060 :
3061 : bool
3062 : ends_with(basic_string_view<_CharT, _Traits> __x) const noexcept
3063 : { return __sv_type(this->data(), this->size()).ends_with(__x); }
3064 :
3065 : bool
3066 : ends_with(_CharT __x) const noexcept
3067 : { return __sv_type(this->data(), this->size()).ends_with(__x); }
3068 :
3069 : bool
3070 : ends_with(const _CharT* __x) const noexcept
3071 : { return __sv_type(this->data(), this->size()).ends_with(__x); }
3072 : #endif // C++20
3073 :
3074 : // Allow basic_stringbuf::__xfer_bufptrs to call _M_length:
3075 : template<typename, typename, typename> friend class basic_stringbuf;
3076 : };
3077 : _GLIBCXX_END_NAMESPACE_CXX11
3078 : #else // !_GLIBCXX_USE_CXX11_ABI
3079 : // Reference-counted COW string implentation
3080 :
3081 : /**
3082 : * @class basic_string basic_string.h <string>
3083 : * @brief Managing sequences of characters and character-like objects.
3084 : *
3085 : * @ingroup strings
3086 : * @ingroup sequences
3087 : *
3088 : * @tparam _CharT Type of character
3089 : * @tparam _Traits Traits for character type, defaults to
3090 : * char_traits<_CharT>.
3091 : * @tparam _Alloc Allocator type, defaults to allocator<_CharT>.
3092 : *
3093 : * Meets the requirements of a <a href="tables.html#65">container</a>, a
3094 : * <a href="tables.html#66">reversible container</a>, and a
3095 : * <a href="tables.html#67">sequence</a>. Of the
3096 : * <a href="tables.html#68">optional sequence requirements</a>, only
3097 : * @c push_back, @c at, and @c %array access are supported.
3098 : *
3099 : * @doctodo
3100 : *
3101 : *
3102 : * Documentation? What's that?
3103 : * Nathan Myers <ncm@cantrip.org>.
3104 : *
3105 : * A string looks like this:
3106 : *
3107 : * @code
3108 : * [_Rep]
3109 : * _M_length
3110 : * [basic_string<char_type>] _M_capacity
3111 : * _M_dataplus _M_refcount
3112 : * _M_p ----------------> unnamed array of char_type
3113 : * @endcode
3114 : *
3115 : * Where the _M_p points to the first character in the string, and
3116 : * you cast it to a pointer-to-_Rep and subtract 1 to get a
3117 : * pointer to the header.
3118 : *
3119 : * This approach has the enormous advantage that a string object
3120 : * requires only one allocation. All the ugliness is confined
3121 : * within a single %pair of inline functions, which each compile to
3122 : * a single @a add instruction: _Rep::_M_data(), and
3123 : * string::_M_rep(); and the allocation function which gets a
3124 : * block of raw bytes and with room enough and constructs a _Rep
3125 : * object at the front.
3126 : *
3127 : * The reason you want _M_data pointing to the character %array and
3128 : * not the _Rep is so that the debugger can see the string
3129 : * contents. (Probably we should add a non-inline member to get
3130 : * the _Rep for the debugger to use, so users can check the actual
3131 : * string length.)
3132 : *
3133 : * Note that the _Rep object is a POD so that you can have a
3134 : * static <em>empty string</em> _Rep object already @a constructed before
3135 : * static constructors have run. The reference-count encoding is
3136 : * chosen so that a 0 indicates one reference, so you never try to
3137 : * destroy the empty-string _Rep object.
3138 : *
3139 : * All but the last paragraph is considered pretty conventional
3140 : * for a C++ string implementation.
3141 : */
3142 : // 21.3 Template class basic_string
3143 : template<typename _CharT, typename _Traits, typename _Alloc>
3144 : class basic_string
3145 : {
3146 : typedef typename _Alloc::template rebind<_CharT>::other _CharT_alloc_type;
3147 :
3148 : // Types:
3149 : public:
3150 : typedef _Traits traits_type;
3151 : typedef typename _Traits::char_type value_type;
3152 : typedef _Alloc allocator_type;
3153 : typedef typename _CharT_alloc_type::size_type size_type;
3154 : typedef typename _CharT_alloc_type::difference_type difference_type;
3155 : #if __cplusplus < 201103L
3156 : typedef typename _CharT_alloc_type::reference reference;
3157 : typedef typename _CharT_alloc_type::const_reference const_reference;
3158 : #else
3159 : typedef value_type& reference;
3160 : typedef const value_type& const_reference;
3161 : #endif
3162 : typedef typename _CharT_alloc_type::pointer pointer;
3163 : typedef typename _CharT_alloc_type::const_pointer const_pointer;
3164 : typedef __gnu_cxx::__normal_iterator<pointer, basic_string> iterator;
3165 : typedef __gnu_cxx::__normal_iterator<const_pointer, basic_string>
3166 : const_iterator;
3167 : typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
3168 : typedef std::reverse_iterator<iterator> reverse_iterator;
3169 :
3170 : protected:
3171 : // type used for positions in insert, erase etc.
3172 : typedef iterator __const_iterator;
3173 :
3174 : private:
3175 : // _Rep: string representation
3176 : // Invariants:
3177 : // 1. String really contains _M_length + 1 characters: due to 21.3.4
3178 : // must be kept null-terminated.
3179 : // 2. _M_capacity >= _M_length
3180 : // Allocated memory is always (_M_capacity + 1) * sizeof(_CharT).
3181 : // 3. _M_refcount has three states:
3182 : // -1: leaked, one reference, no ref-copies allowed, non-const.
3183 : // 0: one reference, non-const.
3184 : // n>0: n + 1 references, operations require a lock, const.
3185 : // 4. All fields==0 is an empty string, given the extra storage
3186 : // beyond-the-end for a null terminator; thus, the shared
3187 : // empty string representation needs no constructor.
3188 :
3189 : struct _Rep_base
3190 : {
3191 : size_type _M_length;
3192 : size_type _M_capacity;
3193 : _Atomic_word _M_refcount;
3194 : };
3195 :
3196 : struct _Rep : _Rep_base
3197 : {
3198 : // Types:
3199 : typedef typename _Alloc::template rebind<char>::other _Raw_bytes_alloc;
3200 :
3201 : // (Public) Data members:
3202 :
3203 : // The maximum number of individual char_type elements of an
3204 : // individual string is determined by _S_max_size. This is the
3205 : // value that will be returned by max_size(). (Whereas npos
3206 : // is the maximum number of bytes the allocator can allocate.)
3207 : // If one was to divvy up the theoretical largest size string,
3208 : // with a terminating character and m _CharT elements, it'd
3209 : // look like this:
3210 : // npos = sizeof(_Rep) + (m * sizeof(_CharT)) + sizeof(_CharT)
3211 : // Solving for m:
3212 : // m = ((npos - sizeof(_Rep))/sizeof(CharT)) - 1
3213 : // In addition, this implementation quarters this amount.
3214 : static const size_type _S_max_size;
3215 : static const _CharT _S_terminal;
3216 :
3217 : // The following storage is init'd to 0 by the linker, resulting
3218 : // (carefully) in an empty string with one reference.
3219 : static size_type _S_empty_rep_storage[];
3220 :
3221 : static _Rep&
3222 : _S_empty_rep() _GLIBCXX_NOEXCEPT
3223 : {
3224 : // NB: Mild hack to avoid strict-aliasing warnings. Note that
3225 : // _S_empty_rep_storage is never modified and the punning should
3226 : // be reasonably safe in this case.
3227 : void* __p = reinterpret_cast<void*>(&_S_empty_rep_storage);
3228 : return *reinterpret_cast<_Rep*>(__p);
3229 : }
3230 :
3231 : bool
3232 : _M_is_leaked() const _GLIBCXX_NOEXCEPT
3233 : {
3234 : #if defined(__GTHREADS)
3235 : // _M_refcount is mutated concurrently by _M_refcopy/_M_dispose,
3236 : // so we need to use an atomic load. However, _M_is_leaked
3237 : // predicate does not change concurrently (i.e. the string is either
3238 : // leaked or not), so a relaxed load is enough.
3239 : return __atomic_load_n(&this->_M_refcount, __ATOMIC_RELAXED) < 0;
3240 : #else
3241 : return this->_M_refcount < 0;
3242 : #endif
3243 : }
3244 :
3245 : bool
3246 : _M_is_shared() const _GLIBCXX_NOEXCEPT
3247 : {
3248 : #if defined(__GTHREADS)
3249 : // _M_refcount is mutated concurrently by _M_refcopy/_M_dispose,
3250 : // so we need to use an atomic load. Another thread can drop last
3251 : // but one reference concurrently with this check, so we need this
3252 : // load to be acquire to synchronize with release fetch_and_add in
3253 : // _M_dispose.
3254 : return __atomic_load_n(&this->_M_refcount, __ATOMIC_ACQUIRE) > 0;
3255 : #else
3256 : return this->_M_refcount > 0;
3257 : #endif
3258 : }
3259 :
3260 : void
3261 : _M_set_leaked() _GLIBCXX_NOEXCEPT
3262 : { this->_M_refcount = -1; }
3263 :
3264 : void
3265 : _M_set_sharable() _GLIBCXX_NOEXCEPT
3266 : { this->_M_refcount = 0; }
3267 :
3268 : void
3269 : _M_set_length_and_sharable(size_type __n) _GLIBCXX_NOEXCEPT
3270 : {
3271 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
3272 : if (__builtin_expect(this != &_S_empty_rep(), false))
3273 : #endif
3274 : {
3275 : this->_M_set_sharable(); // One reference.
3276 : this->_M_length = __n;
3277 : traits_type::assign(this->_M_refdata()[__n], _S_terminal);
3278 : // grrr. (per 21.3.4)
3279 : // You cannot leave those LWG people alone for a second.
3280 : }
3281 : }
3282 :
3283 : _CharT*
3284 : _M_refdata() throw()
3285 : { return reinterpret_cast<_CharT*>(this + 1); }
3286 :
3287 : _CharT*
3288 : _M_grab(const _Alloc& __alloc1, const _Alloc& __alloc2)
3289 : {
3290 : return (!_M_is_leaked() && __alloc1 == __alloc2)
3291 : ? _M_refcopy() : _M_clone(__alloc1);
3292 : }
3293 :
3294 : // Create & Destroy
3295 : static _Rep*
3296 : _S_create(size_type, size_type, const _Alloc&);
3297 :
3298 : void
3299 : _M_dispose(const _Alloc& __a) _GLIBCXX_NOEXCEPT
3300 : {
3301 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
3302 : if (__builtin_expect(this != &_S_empty_rep(), false))
3303 : #endif
3304 : {
3305 : // Be race-detector-friendly. For more info see bits/c++config.
3306 : _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&this->_M_refcount);
3307 : // Decrement of _M_refcount is acq_rel, because:
3308 : // - all but last decrements need to release to synchronize with
3309 : // the last decrement that will delete the object.
3310 : // - the last decrement needs to acquire to synchronize with
3311 : // all the previous decrements.
3312 : // - last but one decrement needs to release to synchronize with
3313 : // the acquire load in _M_is_shared that will conclude that
3314 : // the object is not shared anymore.
3315 : if (__gnu_cxx::__exchange_and_add_dispatch(&this->_M_refcount,
3316 : -1) <= 0)
3317 : {
3318 : _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&this->_M_refcount);
3319 : _M_destroy(__a);
3320 : }
3321 : }
3322 : } // XXX MT
3323 :
3324 : void
3325 : _M_destroy(const _Alloc&) throw();
3326 :
3327 : _CharT*
3328 : _M_refcopy() throw()
3329 : {
3330 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
3331 : if (__builtin_expect(this != &_S_empty_rep(), false))
3332 : #endif
3333 : __gnu_cxx::__atomic_add_dispatch(&this->_M_refcount, 1);
3334 : return _M_refdata();
3335 : } // XXX MT
3336 :
3337 : _CharT*
3338 : _M_clone(const _Alloc&, size_type __res = 0);
3339 : };
3340 :
3341 : // Use empty-base optimization: http://www.cantrip.org/emptyopt.html
3342 : struct _Alloc_hider : _Alloc
3343 : {
3344 : _Alloc_hider(_CharT* __dat, const _Alloc& __a) _GLIBCXX_NOEXCEPT
3345 : : _Alloc(__a), _M_p(__dat) { }
3346 :
3347 : _CharT* _M_p; // The actual data.
3348 : };
3349 :
3350 : public:
3351 : // Data Members (public):
3352 : // NB: This is an unsigned type, and thus represents the maximum
3353 : // size that the allocator can hold.
3354 : /// Value returned by various member functions when they fail.
3355 : static const size_type npos = static_cast<size_type>(-1);
3356 :
3357 : private:
3358 : // Data Members (private):
3359 : mutable _Alloc_hider _M_dataplus;
3360 :
3361 : _CharT*
3362 : _M_data() const _GLIBCXX_NOEXCEPT
3363 : { return _M_dataplus._M_p; }
3364 :
3365 : _CharT*
3366 : _M_data(_CharT* __p) _GLIBCXX_NOEXCEPT
3367 : { return (_M_dataplus._M_p = __p); }
3368 :
3369 : _Rep*
3370 : _M_rep() const _GLIBCXX_NOEXCEPT
3371 : { return &((reinterpret_cast<_Rep*> (_M_data()))[-1]); }
3372 :
3373 : // For the internal use we have functions similar to `begin'/`end'
3374 : // but they do not call _M_leak.
3375 : iterator
3376 : _M_ibegin() const _GLIBCXX_NOEXCEPT
3377 : { return iterator(_M_data()); }
3378 :
3379 : iterator
3380 : _M_iend() const _GLIBCXX_NOEXCEPT
3381 : { return iterator(_M_data() + this->size()); }
3382 :
3383 : void
3384 : _M_leak() // for use in begin() & non-const op[]
3385 : {
3386 : if (!_M_rep()->_M_is_leaked())
3387 : _M_leak_hard();
3388 : }
3389 :
3390 : size_type
3391 : _M_check(size_type __pos, const char* __s) const
3392 : {
3393 : if (__pos > this->size())
3394 : __throw_out_of_range_fmt(__N("%s: __pos (which is %zu) > "
3395 : "this->size() (which is %zu)"),
3396 : __s, __pos, this->size());
3397 : return __pos;
3398 : }
3399 :
3400 : void
3401 : _M_check_length(size_type __n1, size_type __n2, const char* __s) const
3402 : {
3403 : if (this->max_size() - (this->size() - __n1) < __n2)
3404 : __throw_length_error(__N(__s));
3405 : }
3406 :
3407 : // NB: _M_limit doesn't check for a bad __pos value.
3408 : size_type
3409 : _M_limit(size_type __pos, size_type __off) const _GLIBCXX_NOEXCEPT
3410 : {
3411 : const bool __testoff = __off < this->size() - __pos;
3412 : return __testoff ? __off : this->size() - __pos;
3413 : }
3414 :
3415 : // True if _Rep and source do not overlap.
3416 : bool
3417 : _M_disjunct(const _CharT* __s) const _GLIBCXX_NOEXCEPT
3418 : {
3419 : return (less<const _CharT*>()(__s, _M_data())
3420 : || less<const _CharT*>()(_M_data() + this->size(), __s));
3421 : }
3422 :
3423 : // When __n = 1 way faster than the general multichar
3424 : // traits_type::copy/move/assign.
3425 : static void
3426 : _M_copy(_CharT* __d, const _CharT* __s, size_type __n) _GLIBCXX_NOEXCEPT
3427 : {
3428 : if (__n == 1)
3429 : traits_type::assign(*__d, *__s);
3430 : else
3431 : traits_type::copy(__d, __s, __n);
3432 : }
3433 :
3434 : static void
3435 : _M_move(_CharT* __d, const _CharT* __s, size_type __n) _GLIBCXX_NOEXCEPT
3436 : {
3437 : if (__n == 1)
3438 : traits_type::assign(*__d, *__s);
3439 : else
3440 : traits_type::move(__d, __s, __n);
3441 : }
3442 :
3443 : static void
3444 : _M_assign(_CharT* __d, size_type __n, _CharT __c) _GLIBCXX_NOEXCEPT
3445 : {
3446 : if (__n == 1)
3447 : traits_type::assign(*__d, __c);
3448 : else
3449 : traits_type::assign(__d, __n, __c);
3450 : }
3451 :
3452 : // _S_copy_chars is a separate template to permit specialization
3453 : // to optimize for the common case of pointers as iterators.
3454 : template<class _Iterator>
3455 : static void
3456 : _S_copy_chars(_CharT* __p, _Iterator __k1, _Iterator __k2)
3457 : {
3458 : for (; __k1 != __k2; ++__k1, (void)++__p)
3459 : traits_type::assign(*__p, *__k1); // These types are off.
3460 : }
3461 :
3462 : static void
3463 : _S_copy_chars(_CharT* __p, iterator __k1, iterator __k2) _GLIBCXX_NOEXCEPT
3464 : { _S_copy_chars(__p, __k1.base(), __k2.base()); }
3465 :
3466 : static void
3467 : _S_copy_chars(_CharT* __p, const_iterator __k1, const_iterator __k2)
3468 : _GLIBCXX_NOEXCEPT
3469 : { _S_copy_chars(__p, __k1.base(), __k2.base()); }
3470 :
3471 : static void
3472 : _S_copy_chars(_CharT* __p, _CharT* __k1, _CharT* __k2) _GLIBCXX_NOEXCEPT
3473 : { _M_copy(__p, __k1, __k2 - __k1); }
3474 :
3475 : static void
3476 : _S_copy_chars(_CharT* __p, const _CharT* __k1, const _CharT* __k2)
3477 : _GLIBCXX_NOEXCEPT
3478 : { _M_copy(__p, __k1, __k2 - __k1); }
3479 :
3480 : static int
3481 : _S_compare(size_type __n1, size_type __n2) _GLIBCXX_NOEXCEPT
3482 : {
3483 : const difference_type __d = difference_type(__n1 - __n2);
3484 :
3485 : if (__d > __gnu_cxx::__numeric_traits<int>::__max)
3486 : return __gnu_cxx::__numeric_traits<int>::__max;
3487 : else if (__d < __gnu_cxx::__numeric_traits<int>::__min)
3488 : return __gnu_cxx::__numeric_traits<int>::__min;
3489 : else
3490 : return int(__d);
3491 : }
3492 :
3493 : void
3494 : _M_mutate(size_type __pos, size_type __len1, size_type __len2);
3495 :
3496 : void
3497 : _M_leak_hard();
3498 :
3499 : static _Rep&
3500 : _S_empty_rep() _GLIBCXX_NOEXCEPT
3501 : { return _Rep::_S_empty_rep(); }
3502 :
3503 : #if __cplusplus >= 201703L
3504 : // A helper type for avoiding boiler-plate.
3505 : typedef basic_string_view<_CharT, _Traits> __sv_type;
3506 :
3507 : template<typename _Tp, typename _Res>
3508 : using _If_sv = enable_if_t<
3509 : __and_<is_convertible<const _Tp&, __sv_type>,
3510 : __not_<is_convertible<const _Tp*, const basic_string*>>,
3511 : __not_<is_convertible<const _Tp&, const _CharT*>>>::value,
3512 : _Res>;
3513 :
3514 : // Allows an implicit conversion to __sv_type.
3515 : static __sv_type
3516 : _S_to_string_view(__sv_type __svt) noexcept
3517 : { return __svt; }
3518 :
3519 : // Wraps a string_view by explicit conversion and thus
3520 : // allows to add an internal constructor that does not
3521 : // participate in overload resolution when a string_view
3522 : // is provided.
3523 : struct __sv_wrapper
3524 : {
3525 : explicit __sv_wrapper(__sv_type __sv) noexcept : _M_sv(__sv) { }
3526 : __sv_type _M_sv;
3527 : };
3528 :
3529 : /**
3530 : * @brief Only internally used: Construct string from a string view
3531 : * wrapper.
3532 : * @param __svw string view wrapper.
3533 : * @param __a Allocator to use.
3534 : */
3535 : explicit
3536 : basic_string(__sv_wrapper __svw, const _Alloc& __a)
3537 : : basic_string(__svw._M_sv.data(), __svw._M_sv.size(), __a) { }
3538 : #endif
3539 :
3540 : public:
3541 : // Construct/copy/destroy:
3542 : // NB: We overload ctors in some cases instead of using default
3543 : // arguments, per 17.4.4.4 para. 2 item 2.
3544 :
3545 : /**
3546 : * @brief Default constructor creates an empty string.
3547 : */
3548 : basic_string()
3549 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
3550 : _GLIBCXX_NOEXCEPT
3551 : : _M_dataplus(_S_empty_rep()._M_refdata(), _Alloc())
3552 : #else
3553 : : _M_dataplus(_S_construct(size_type(), _CharT(), _Alloc()), _Alloc())
3554 : #endif
3555 : { }
3556 :
3557 : /**
3558 : * @brief Construct an empty string using allocator @a a.
3559 : */
3560 : explicit
3561 : basic_string(const _Alloc& __a);
3562 :
3563 : // NB: per LWG issue 42, semantics different from IS:
3564 : /**
3565 : * @brief Construct string with copy of value of @a str.
3566 : * @param __str Source string.
3567 : */
3568 : basic_string(const basic_string& __str);
3569 :
3570 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
3571 : // 2583. no way to supply an allocator for basic_string(str, pos)
3572 : /**
3573 : * @brief Construct string as copy of a substring.
3574 : * @param __str Source string.
3575 : * @param __pos Index of first character to copy from.
3576 : * @param __a Allocator to use.
3577 : */
3578 : basic_string(const basic_string& __str, size_type __pos,
3579 : const _Alloc& __a = _Alloc());
3580 :
3581 : /**
3582 : * @brief Construct string as copy of a substring.
3583 : * @param __str Source string.
3584 : * @param __pos Index of first character to copy from.
3585 : * @param __n Number of characters to copy.
3586 : */
3587 : basic_string(const basic_string& __str, size_type __pos,
3588 : size_type __n);
3589 : /**
3590 : * @brief Construct string as copy of a substring.
3591 : * @param __str Source string.
3592 : * @param __pos Index of first character to copy from.
3593 : * @param __n Number of characters to copy.
3594 : * @param __a Allocator to use.
3595 : */
3596 : basic_string(const basic_string& __str, size_type __pos,
3597 : size_type __n, const _Alloc& __a);
3598 :
3599 : /**
3600 : * @brief Construct string initialized by a character %array.
3601 : * @param __s Source character %array.
3602 : * @param __n Number of characters to copy.
3603 : * @param __a Allocator to use (default is default allocator).
3604 : *
3605 : * NB: @a __s must have at least @a __n characters, '\\0'
3606 : * has no special meaning.
3607 : */
3608 : basic_string(const _CharT* __s, size_type __n,
3609 : const _Alloc& __a = _Alloc());
3610 : /**
3611 : * @brief Construct string as copy of a C string.
3612 : * @param __s Source C string.
3613 : * @param __a Allocator to use (default is default allocator).
3614 : */
3615 : basic_string(const _CharT* __s, const _Alloc& __a = _Alloc());
3616 : /**
3617 : * @brief Construct string as multiple characters.
3618 : * @param __n Number of characters.
3619 : * @param __c Character to use.
3620 : * @param __a Allocator to use (default is default allocator).
3621 : */
3622 : basic_string(size_type __n, _CharT __c, const _Alloc& __a = _Alloc());
3623 :
3624 : #if __cplusplus >= 201103L
3625 : /**
3626 : * @brief Move construct string.
3627 : * @param __str Source string.
3628 : *
3629 : * The newly-created string contains the exact contents of @a __str.
3630 : * @a __str is a valid, but unspecified string.
3631 : **/
3632 : basic_string(basic_string&& __str)
3633 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
3634 : noexcept // FIXME C++11: should always be noexcept.
3635 : #endif
3636 : : _M_dataplus(std::move(__str._M_dataplus))
3637 : {
3638 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
3639 : __str._M_data(_S_empty_rep()._M_refdata());
3640 : #else
3641 : __str._M_data(_S_construct(size_type(), _CharT(), get_allocator()));
3642 : #endif
3643 : }
3644 :
3645 : /**
3646 : * @brief Construct string from an initializer %list.
3647 : * @param __l std::initializer_list of characters.
3648 : * @param __a Allocator to use (default is default allocator).
3649 : */
3650 : basic_string(initializer_list<_CharT> __l, const _Alloc& __a = _Alloc());
3651 :
3652 : basic_string(const basic_string& __str, const _Alloc& __a)
3653 : : _M_dataplus(__str._M_rep()->_M_grab(__a, __str.get_allocator()), __a)
3654 : { }
3655 :
3656 : basic_string(basic_string&& __str, const _Alloc& __a)
3657 : : _M_dataplus(__str._M_data(), __a)
3658 : {
3659 : if (__a == __str.get_allocator())
3660 : {
3661 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
3662 : __str._M_data(_S_empty_rep()._M_refdata());
3663 : #else
3664 : __str._M_data(_S_construct(size_type(), _CharT(), __a));
3665 : #endif
3666 : }
3667 : else
3668 : _M_dataplus._M_p = _S_construct(__str.begin(), __str.end(), __a);
3669 : }
3670 : #endif // C++11
3671 :
3672 : /**
3673 : * @brief Construct string as copy of a range.
3674 : * @param __beg Start of range.
3675 : * @param __end End of range.
3676 : * @param __a Allocator to use (default is default allocator).
3677 : */
3678 : template<class _InputIterator>
3679 : basic_string(_InputIterator __beg, _InputIterator __end,
3680 : const _Alloc& __a = _Alloc());
3681 :
3682 : #if __cplusplus >= 201703L
3683 : /**
3684 : * @brief Construct string from a substring of a string_view.
3685 : * @param __t Source object convertible to string view.
3686 : * @param __pos The index of the first character to copy from __t.
3687 : * @param __n The number of characters to copy from __t.
3688 : * @param __a Allocator to use.
3689 : */
3690 : template<typename _Tp, typename = _If_sv<_Tp, void>>
3691 : basic_string(const _Tp& __t, size_type __pos, size_type __n,
3692 : const _Alloc& __a = _Alloc())
3693 : : basic_string(_S_to_string_view(__t).substr(__pos, __n), __a) { }
3694 :
3695 : /**
3696 : * @brief Construct string from a string_view.
3697 : * @param __t Source object convertible to string view.
3698 : * @param __a Allocator to use (default is default allocator).
3699 : */
3700 : template<typename _Tp, typename = _If_sv<_Tp, void>>
3701 : explicit
3702 : basic_string(const _Tp& __t, const _Alloc& __a = _Alloc())
3703 : : basic_string(__sv_wrapper(_S_to_string_view(__t)), __a) { }
3704 : #endif // C++17
3705 :
3706 : /**
3707 : * @brief Destroy the string instance.
3708 : */
3709 : ~basic_string() _GLIBCXX_NOEXCEPT
3710 : { _M_rep()->_M_dispose(this->get_allocator()); }
3711 :
3712 : /**
3713 : * @brief Assign the value of @a str to this string.
3714 : * @param __str Source string.
3715 : */
3716 : basic_string&
3717 : operator=(const basic_string& __str)
3718 : { return this->assign(__str); }
3719 :
3720 : /**
3721 : * @brief Copy contents of @a s into this string.
3722 : * @param __s Source null-terminated string.
3723 : */
3724 : basic_string&
3725 : operator=(const _CharT* __s)
3726 : { return this->assign(__s); }
3727 :
3728 : /**
3729 : * @brief Set value to string of length 1.
3730 : * @param __c Source character.
3731 : *
3732 : * Assigning to a character makes this string length 1 and
3733 : * (*this)[0] == @a c.
3734 : */
3735 : basic_string&
3736 : operator=(_CharT __c)
3737 : {
3738 : this->assign(1, __c);
3739 : return *this;
3740 : }
3741 :
3742 : #if __cplusplus >= 201103L
3743 : /**
3744 : * @brief Move assign the value of @a str to this string.
3745 : * @param __str Source string.
3746 : *
3747 : * The contents of @a str are moved into this string (without copying).
3748 : * @a str is a valid, but unspecified string.
3749 : **/
3750 : basic_string&
3751 : operator=(basic_string&& __str)
3752 : _GLIBCXX_NOEXCEPT_IF(allocator_traits<_Alloc>::is_always_equal::value)
3753 : {
3754 : // NB: DR 1204.
3755 : this->swap(__str);
3756 : return *this;
3757 : }
3758 :
3759 : /**
3760 : * @brief Set value to string constructed from initializer %list.
3761 : * @param __l std::initializer_list.
3762 : */
3763 : basic_string&
3764 : operator=(initializer_list<_CharT> __l)
3765 : {
3766 : this->assign(__l.begin(), __l.size());
3767 : return *this;
3768 : }
3769 : #endif // C++11
3770 :
3771 : #if __cplusplus >= 201703L
3772 : /**
3773 : * @brief Set value to string constructed from a string_view.
3774 : * @param __svt An object convertible to string_view.
3775 : */
3776 : template<typename _Tp>
3777 : _If_sv<_Tp, basic_string&>
3778 : operator=(const _Tp& __svt)
3779 : { return this->assign(__svt); }
3780 :
3781 : /**
3782 : * @brief Convert to a string_view.
3783 : * @return A string_view.
3784 : */
3785 : operator __sv_type() const noexcept
3786 : { return __sv_type(data(), size()); }
3787 : #endif // C++17
3788 :
3789 : // Iterators:
3790 : /**
3791 : * Returns a read/write iterator that points to the first character in
3792 : * the %string. Unshares the string.
3793 : */
3794 : iterator
3795 : begin() // FIXME C++11: should be noexcept.
3796 : {
3797 : _M_leak();
3798 : return iterator(_M_data());
3799 : }
3800 :
3801 : /**
3802 : * Returns a read-only (constant) iterator that points to the first
3803 : * character in the %string.
3804 : */
3805 : const_iterator
3806 : begin() const _GLIBCXX_NOEXCEPT
3807 : { return const_iterator(_M_data()); }
3808 :
3809 : /**
3810 : * Returns a read/write iterator that points one past the last
3811 : * character in the %string. Unshares the string.
3812 : */
3813 : iterator
3814 : end() // FIXME C++11: should be noexcept.
3815 : {
3816 : _M_leak();
3817 : return iterator(_M_data() + this->size());
3818 : }
3819 :
3820 : /**
3821 : * Returns a read-only (constant) iterator that points one past the
3822 : * last character in the %string.
3823 : */
3824 : const_iterator
3825 : end() const _GLIBCXX_NOEXCEPT
3826 : { return const_iterator(_M_data() + this->size()); }
3827 :
3828 : /**
3829 : * Returns a read/write reverse iterator that points to the last
3830 : * character in the %string. Iteration is done in reverse element
3831 : * order. Unshares the string.
3832 : */
3833 : reverse_iterator
3834 : rbegin() // FIXME C++11: should be noexcept.
3835 : { return reverse_iterator(this->end()); }
3836 :
3837 : /**
3838 : * Returns a read-only (constant) reverse iterator that points
3839 : * to the last character in the %string. Iteration is done in
3840 : * reverse element order.
3841 : */
3842 : const_reverse_iterator
3843 : rbegin() const _GLIBCXX_NOEXCEPT
3844 : { return const_reverse_iterator(this->end()); }
3845 :
3846 : /**
3847 : * Returns a read/write reverse iterator that points to one before the
3848 : * first character in the %string. Iteration is done in reverse
3849 : * element order. Unshares the string.
3850 : */
3851 : reverse_iterator
3852 : rend() // FIXME C++11: should be noexcept.
3853 : { return reverse_iterator(this->begin()); }
3854 :
3855 : /**
3856 : * Returns a read-only (constant) reverse iterator that points
3857 : * to one before the first character in the %string. Iteration
3858 : * is done in reverse element order.
3859 : */
3860 : const_reverse_iterator
3861 : rend() const _GLIBCXX_NOEXCEPT
3862 : { return const_reverse_iterator(this->begin()); }
3863 :
3864 : #if __cplusplus >= 201103L
3865 : /**
3866 : * Returns a read-only (constant) iterator that points to the first
3867 : * character in the %string.
3868 : */
3869 : const_iterator
3870 : cbegin() const noexcept
3871 : { return const_iterator(this->_M_data()); }
3872 :
3873 : /**
3874 : * Returns a read-only (constant) iterator that points one past the
3875 : * last character in the %string.
3876 : */
3877 : const_iterator
3878 : cend() const noexcept
3879 : { return const_iterator(this->_M_data() + this->size()); }
3880 :
3881 : /**
3882 : * Returns a read-only (constant) reverse iterator that points
3883 : * to the last character in the %string. Iteration is done in
3884 : * reverse element order.
3885 : */
3886 : const_reverse_iterator
3887 : crbegin() const noexcept
3888 : { return const_reverse_iterator(this->end()); }
3889 :
3890 : /**
3891 : * Returns a read-only (constant) reverse iterator that points
3892 : * to one before the first character in the %string. Iteration
3893 : * is done in reverse element order.
3894 : */
3895 : const_reverse_iterator
3896 : crend() const noexcept
3897 : { return const_reverse_iterator(this->begin()); }
3898 : #endif
3899 :
3900 : public:
3901 : // Capacity:
3902 : /// Returns the number of characters in the string, not including any
3903 : /// null-termination.
3904 : size_type
3905 : size() const _GLIBCXX_NOEXCEPT
3906 : { return _M_rep()->_M_length; }
3907 :
3908 : /// Returns the number of characters in the string, not including any
3909 : /// null-termination.
3910 : size_type
3911 : length() const _GLIBCXX_NOEXCEPT
3912 : { return _M_rep()->_M_length; }
3913 :
3914 : /// Returns the size() of the largest possible %string.
3915 : size_type
3916 : max_size() const _GLIBCXX_NOEXCEPT
3917 : { return _Rep::_S_max_size; }
3918 :
3919 : /**
3920 : * @brief Resizes the %string to the specified number of characters.
3921 : * @param __n Number of characters the %string should contain.
3922 : * @param __c Character to fill any new elements.
3923 : *
3924 : * This function will %resize the %string to the specified
3925 : * number of characters. If the number is smaller than the
3926 : * %string's current size the %string is truncated, otherwise
3927 : * the %string is extended and new elements are %set to @a __c.
3928 : */
3929 : void
3930 : resize(size_type __n, _CharT __c);
3931 :
3932 : /**
3933 : * @brief Resizes the %string to the specified number of characters.
3934 : * @param __n Number of characters the %string should contain.
3935 : *
3936 : * This function will resize the %string to the specified length. If
3937 : * the new size is smaller than the %string's current size the %string
3938 : * is truncated, otherwise the %string is extended and new characters
3939 : * are default-constructed. For basic types such as char, this means
3940 : * setting them to 0.
3941 : */
3942 : void
3943 : resize(size_type __n)
3944 : { this->resize(__n, _CharT()); }
3945 :
3946 : #if __cplusplus >= 201103L
3947 : /// A non-binding request to reduce capacity() to size().
3948 : void
3949 : shrink_to_fit() _GLIBCXX_NOEXCEPT
3950 : {
3951 : #if __cpp_exceptions
3952 : if (capacity() > size())
3953 : {
3954 : try
3955 : { reserve(0); }
3956 : catch(...)
3957 : { }
3958 : }
3959 : #endif
3960 : }
3961 : #endif
3962 :
3963 : /**
3964 : * Returns the total number of characters that the %string can hold
3965 : * before needing to allocate more memory.
3966 : */
3967 : size_type
3968 : capacity() const _GLIBCXX_NOEXCEPT
3969 : { return _M_rep()->_M_capacity; }
3970 :
3971 : /**
3972 : * @brief Attempt to preallocate enough memory for specified number of
3973 : * characters.
3974 : * @param __res_arg Number of characters required.
3975 : * @throw std::length_error If @a __res_arg exceeds @c max_size().
3976 : *
3977 : * This function attempts to reserve enough memory for the
3978 : * %string to hold the specified number of characters. If the
3979 : * number requested is more than max_size(), length_error is
3980 : * thrown.
3981 : *
3982 : * The advantage of this function is that if optimal code is a
3983 : * necessity and the user can determine the string length that will be
3984 : * required, the user can reserve the memory in %advance, and thus
3985 : * prevent a possible reallocation of memory and copying of %string
3986 : * data.
3987 : */
3988 : void
3989 : reserve(size_type __res_arg = 0);
3990 :
3991 : /**
3992 : * Erases the string, making it empty.
3993 : */
3994 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
3995 : void
3996 : clear() _GLIBCXX_NOEXCEPT
3997 : {
3998 : if (_M_rep()->_M_is_shared())
3999 : {
4000 : _M_rep()->_M_dispose(this->get_allocator());
4001 : _M_data(_S_empty_rep()._M_refdata());
4002 : }
4003 : else
4004 : _M_rep()->_M_set_length_and_sharable(0);
4005 : }
4006 : #else
4007 : // PR 56166: this should not throw.
4008 : void
4009 : clear()
4010 : { _M_mutate(0, this->size(), 0); }
4011 : #endif
4012 :
4013 : /**
4014 : * Returns true if the %string is empty. Equivalent to
4015 : * <code>*this == ""</code>.
4016 : */
4017 : _GLIBCXX_NODISCARD bool
4018 : empty() const _GLIBCXX_NOEXCEPT
4019 : { return this->size() == 0; }
4020 :
4021 : // Element access:
4022 : /**
4023 : * @brief Subscript access to the data contained in the %string.
4024 : * @param __pos The index of the character to access.
4025 : * @return Read-only (constant) reference to the character.
4026 : *
4027 : * This operator allows for easy, array-style, data access.
4028 : * Note that data access with this operator is unchecked and
4029 : * out_of_range lookups are not defined. (For checked lookups
4030 : * see at().)
4031 : */
4032 : const_reference
4033 : operator[] (size_type __pos) const _GLIBCXX_NOEXCEPT
4034 : {
4035 : __glibcxx_assert(__pos <= size());
4036 : return _M_data()[__pos];
4037 : }
4038 :
4039 : /**
4040 : * @brief Subscript access to the data contained in the %string.
4041 : * @param __pos The index of the character to access.
4042 : * @return Read/write reference to the character.
4043 : *
4044 : * This operator allows for easy, array-style, data access.
4045 : * Note that data access with this operator is unchecked and
4046 : * out_of_range lookups are not defined. (For checked lookups
4047 : * see at().) Unshares the string.
4048 : */
4049 : reference
4050 : operator[](size_type __pos)
4051 : {
4052 : // Allow pos == size() both in C++98 mode, as v3 extension,
4053 : // and in C++11 mode.
4054 : __glibcxx_assert(__pos <= size());
4055 : // In pedantic mode be strict in C++98 mode.
4056 : _GLIBCXX_DEBUG_PEDASSERT(__cplusplus >= 201103L || __pos < size());
4057 : _M_leak();
4058 : return _M_data()[__pos];
4059 : }
4060 :
4061 : /**
4062 : * @brief Provides access to the data contained in the %string.
4063 : * @param __n The index of the character to access.
4064 : * @return Read-only (const) reference to the character.
4065 : * @throw std::out_of_range If @a n is an invalid index.
4066 : *
4067 : * This function provides for safer data access. The parameter is
4068 : * first checked that it is in the range of the string. The function
4069 : * throws out_of_range if the check fails.
4070 : */
4071 : const_reference
4072 : at(size_type __n) const
4073 : {
4074 : if (__n >= this->size())
4075 : __throw_out_of_range_fmt(__N("basic_string::at: __n "
4076 : "(which is %zu) >= this->size() "
4077 : "(which is %zu)"),
4078 : __n, this->size());
4079 : return _M_data()[__n];
4080 : }
4081 :
4082 : /**
4083 : * @brief Provides access to the data contained in the %string.
4084 : * @param __n The index of the character to access.
4085 : * @return Read/write reference to the character.
4086 : * @throw std::out_of_range If @a n is an invalid index.
4087 : *
4088 : * This function provides for safer data access. The parameter is
4089 : * first checked that it is in the range of the string. The function
4090 : * throws out_of_range if the check fails. Success results in
4091 : * unsharing the string.
4092 : */
4093 : reference
4094 : at(size_type __n)
4095 : {
4096 : if (__n >= size())
4097 : __throw_out_of_range_fmt(__N("basic_string::at: __n "
4098 : "(which is %zu) >= this->size() "
4099 : "(which is %zu)"),
4100 : __n, this->size());
4101 : _M_leak();
4102 : return _M_data()[__n];
4103 : }
4104 :
4105 : #if __cplusplus >= 201103L
4106 : /**
4107 : * Returns a read/write reference to the data at the first
4108 : * element of the %string.
4109 : */
4110 : reference
4111 : front()
4112 : {
4113 : __glibcxx_assert(!empty());
4114 : return operator[](0);
4115 : }
4116 :
4117 : /**
4118 : * Returns a read-only (constant) reference to the data at the first
4119 : * element of the %string.
4120 : */
4121 : const_reference
4122 : front() const noexcept
4123 : {
4124 : __glibcxx_assert(!empty());
4125 : return operator[](0);
4126 : }
4127 :
4128 : /**
4129 : * Returns a read/write reference to the data at the last
4130 : * element of the %string.
4131 : */
4132 : reference
4133 : back()
4134 : {
4135 : __glibcxx_assert(!empty());
4136 : return operator[](this->size() - 1);
4137 : }
4138 :
4139 : /**
4140 : * Returns a read-only (constant) reference to the data at the
4141 : * last element of the %string.
4142 : */
4143 : const_reference
4144 : back() const noexcept
4145 : {
4146 : __glibcxx_assert(!empty());
4147 : return operator[](this->size() - 1);
4148 : }
4149 : #endif
4150 :
4151 : // Modifiers:
4152 : /**
4153 : * @brief Append a string to this string.
4154 : * @param __str The string to append.
4155 : * @return Reference to this string.
4156 : */
4157 : basic_string&
4158 : operator+=(const basic_string& __str)
4159 : { return this->append(__str); }
4160 :
4161 : /**
4162 : * @brief Append a C string.
4163 : * @param __s The C string to append.
4164 : * @return Reference to this string.
4165 : */
4166 : basic_string&
4167 : operator+=(const _CharT* __s)
4168 : { return this->append(__s); }
4169 :
4170 : /**
4171 : * @brief Append a character.
4172 : * @param __c The character to append.
4173 : * @return Reference to this string.
4174 : */
4175 : basic_string&
4176 : operator+=(_CharT __c)
4177 : {
4178 : this->push_back(__c);
4179 : return *this;
4180 : }
4181 :
4182 : #if __cplusplus >= 201103L
4183 : /**
4184 : * @brief Append an initializer_list of characters.
4185 : * @param __l The initializer_list of characters to be appended.
4186 : * @return Reference to this string.
4187 : */
4188 : basic_string&
4189 : operator+=(initializer_list<_CharT> __l)
4190 : { return this->append(__l.begin(), __l.size()); }
4191 : #endif // C++11
4192 :
4193 : #if __cplusplus >= 201703L
4194 : /**
4195 : * @brief Append a string_view.
4196 : * @param __svt The object convertible to string_view to be appended.
4197 : * @return Reference to this string.
4198 : */
4199 : template<typename _Tp>
4200 : _If_sv<_Tp, basic_string&>
4201 : operator+=(const _Tp& __svt)
4202 : { return this->append(__svt); }
4203 : #endif // C++17
4204 :
4205 : /**
4206 : * @brief Append a string to this string.
4207 : * @param __str The string to append.
4208 : * @return Reference to this string.
4209 : */
4210 : basic_string&
4211 : append(const basic_string& __str);
4212 :
4213 : /**
4214 : * @brief Append a substring.
4215 : * @param __str The string to append.
4216 : * @param __pos Index of the first character of str to append.
4217 : * @param __n The number of characters to append.
4218 : * @return Reference to this string.
4219 : * @throw std::out_of_range if @a __pos is not a valid index.
4220 : *
4221 : * This function appends @a __n characters from @a __str
4222 : * starting at @a __pos to this string. If @a __n is is larger
4223 : * than the number of available characters in @a __str, the
4224 : * remainder of @a __str is appended.
4225 : */
4226 : basic_string&
4227 : append(const basic_string& __str, size_type __pos, size_type __n = npos);
4228 :
4229 : /**
4230 : * @brief Append a C substring.
4231 : * @param __s The C string to append.
4232 : * @param __n The number of characters to append.
4233 : * @return Reference to this string.
4234 : */
4235 : basic_string&
4236 : append(const _CharT* __s, size_type __n);
4237 :
4238 : /**
4239 : * @brief Append a C string.
4240 : * @param __s The C string to append.
4241 : * @return Reference to this string.
4242 : */
4243 : basic_string&
4244 : append(const _CharT* __s)
4245 : {
4246 : __glibcxx_requires_string(__s);
4247 : return this->append(__s, traits_type::length(__s));
4248 : }
4249 :
4250 : /**
4251 : * @brief Append multiple characters.
4252 : * @param __n The number of characters to append.
4253 : * @param __c The character to use.
4254 : * @return Reference to this string.
4255 : *
4256 : * Appends __n copies of __c to this string.
4257 : */
4258 : basic_string&
4259 : append(size_type __n, _CharT __c);
4260 :
4261 : #if __cplusplus >= 201103L
4262 : /**
4263 : * @brief Append an initializer_list of characters.
4264 : * @param __l The initializer_list of characters to append.
4265 : * @return Reference to this string.
4266 : */
4267 : basic_string&
4268 : append(initializer_list<_CharT> __l)
4269 : { return this->append(__l.begin(), __l.size()); }
4270 : #endif // C++11
4271 :
4272 : /**
4273 : * @brief Append a range of characters.
4274 : * @param __first Iterator referencing the first character to append.
4275 : * @param __last Iterator marking the end of the range.
4276 : * @return Reference to this string.
4277 : *
4278 : * Appends characters in the range [__first,__last) to this string.
4279 : */
4280 : template<class _InputIterator>
4281 : basic_string&
4282 : append(_InputIterator __first, _InputIterator __last)
4283 : { return this->replace(_M_iend(), _M_iend(), __first, __last); }
4284 :
4285 : #if __cplusplus >= 201703L
4286 : /**
4287 : * @brief Append a string_view.
4288 : * @param __svt The object convertible to string_view to be appended.
4289 : * @return Reference to this string.
4290 : */
4291 : template<typename _Tp>
4292 : _If_sv<_Tp, basic_string&>
4293 : append(const _Tp& __svt)
4294 : {
4295 : __sv_type __sv = __svt;
4296 : return this->append(__sv.data(), __sv.size());
4297 : }
4298 :
4299 : /**
4300 : * @brief Append a range of characters from a string_view.
4301 : * @param __svt The object convertible to string_view to be appended
4302 : * from.
4303 : * @param __pos The position in the string_view to append from.
4304 : * @param __n The number of characters to append from the string_view.
4305 : * @return Reference to this string.
4306 : */
4307 : template<typename _Tp>
4308 : _If_sv<_Tp, basic_string&>
4309 : append(const _Tp& __svt, size_type __pos, size_type __n = npos)
4310 : {
4311 : __sv_type __sv = __svt;
4312 : return append(__sv.data()
4313 : + std::__sv_check(__sv.size(), __pos, "basic_string::append"),
4314 : std::__sv_limit(__sv.size(), __pos, __n));
4315 : }
4316 : #endif // C++17
4317 :
4318 : /**
4319 : * @brief Append a single character.
4320 : * @param __c Character to append.
4321 : */
4322 : void
4323 : push_back(_CharT __c)
4324 : {
4325 : const size_type __len = 1 + this->size();
4326 : if (__len > this->capacity() || _M_rep()->_M_is_shared())
4327 : this->reserve(__len);
4328 : traits_type::assign(_M_data()[this->size()], __c);
4329 : _M_rep()->_M_set_length_and_sharable(__len);
4330 : }
4331 :
4332 : /**
4333 : * @brief Set value to contents of another string.
4334 : * @param __str Source string to use.
4335 : * @return Reference to this string.
4336 : */
4337 : basic_string&
4338 : assign(const basic_string& __str);
4339 :
4340 : #if __cplusplus >= 201103L
4341 : /**
4342 : * @brief Set value to contents of another string.
4343 : * @param __str Source string to use.
4344 : * @return Reference to this string.
4345 : *
4346 : * This function sets this string to the exact contents of @a __str.
4347 : * @a __str is a valid, but unspecified string.
4348 : */
4349 : basic_string&
4350 : assign(basic_string&& __str)
4351 : noexcept(allocator_traits<_Alloc>::is_always_equal::value)
4352 : {
4353 : this->swap(__str);
4354 : return *this;
4355 : }
4356 : #endif // C++11
4357 :
4358 : /**
4359 : * @brief Set value to a substring of a string.
4360 : * @param __str The string to use.
4361 : * @param __pos Index of the first character of str.
4362 : * @param __n Number of characters to use.
4363 : * @return Reference to this string.
4364 : * @throw std::out_of_range if @a pos is not a valid index.
4365 : *
4366 : * This function sets this string to the substring of @a __str
4367 : * consisting of @a __n characters at @a __pos. If @a __n is
4368 : * is larger than the number of available characters in @a
4369 : * __str, the remainder of @a __str is used.
4370 : */
4371 : basic_string&
4372 : assign(const basic_string& __str, size_type __pos, size_type __n = npos)
4373 : { return this->assign(__str._M_data()
4374 : + __str._M_check(__pos, "basic_string::assign"),
4375 : __str._M_limit(__pos, __n)); }
4376 :
4377 : /**
4378 : * @brief Set value to a C substring.
4379 : * @param __s The C string to use.
4380 : * @param __n Number of characters to use.
4381 : * @return Reference to this string.
4382 : *
4383 : * This function sets the value of this string to the first @a __n
4384 : * characters of @a __s. If @a __n is is larger than the number of
4385 : * available characters in @a __s, the remainder of @a __s is used.
4386 : */
4387 : basic_string&
4388 : assign(const _CharT* __s, size_type __n);
4389 :
4390 : /**
4391 : * @brief Set value to contents of a C string.
4392 : * @param __s The C string to use.
4393 : * @return Reference to this string.
4394 : *
4395 : * This function sets the value of this string to the value of @a __s.
4396 : * The data is copied, so there is no dependence on @a __s once the
4397 : * function returns.
4398 : */
4399 : basic_string&
4400 : assign(const _CharT* __s)
4401 : {
4402 : __glibcxx_requires_string(__s);
4403 : return this->assign(__s, traits_type::length(__s));
4404 : }
4405 :
4406 : /**
4407 : * @brief Set value to multiple characters.
4408 : * @param __n Length of the resulting string.
4409 : * @param __c The character to use.
4410 : * @return Reference to this string.
4411 : *
4412 : * This function sets the value of this string to @a __n copies of
4413 : * character @a __c.
4414 : */
4415 : basic_string&
4416 : assign(size_type __n, _CharT __c)
4417 : { return _M_replace_aux(size_type(0), this->size(), __n, __c); }
4418 :
4419 : /**
4420 : * @brief Set value to a range of characters.
4421 : * @param __first Iterator referencing the first character to append.
4422 : * @param __last Iterator marking the end of the range.
4423 : * @return Reference to this string.
4424 : *
4425 : * Sets value of string to characters in the range [__first,__last).
4426 : */
4427 : template<class _InputIterator>
4428 : basic_string&
4429 : assign(_InputIterator __first, _InputIterator __last)
4430 : { return this->replace(_M_ibegin(), _M_iend(), __first, __last); }
4431 :
4432 : #if __cplusplus >= 201103L
4433 : /**
4434 : * @brief Set value to an initializer_list of characters.
4435 : * @param __l The initializer_list of characters to assign.
4436 : * @return Reference to this string.
4437 : */
4438 : basic_string&
4439 : assign(initializer_list<_CharT> __l)
4440 : { return this->assign(__l.begin(), __l.size()); }
4441 : #endif // C++11
4442 :
4443 : #if __cplusplus >= 201703L
4444 : /**
4445 : * @brief Set value from a string_view.
4446 : * @param __svt The source object convertible to string_view.
4447 : * @return Reference to this string.
4448 : */
4449 : template<typename _Tp>
4450 : _If_sv<_Tp, basic_string&>
4451 : assign(const _Tp& __svt)
4452 : {
4453 : __sv_type __sv = __svt;
4454 : return this->assign(__sv.data(), __sv.size());
4455 : }
4456 :
4457 : /**
4458 : * @brief Set value from a range of characters in a string_view.
4459 : * @param __svt The source object convertible to string_view.
4460 : * @param __pos The position in the string_view to assign from.
4461 : * @param __n The number of characters to assign.
4462 : * @return Reference to this string.
4463 : */
4464 : template<typename _Tp>
4465 : _If_sv<_Tp, basic_string&>
4466 : assign(const _Tp& __svt, size_type __pos, size_type __n = npos)
4467 : {
4468 : __sv_type __sv = __svt;
4469 : return assign(__sv.data()
4470 : + std::__sv_check(__sv.size(), __pos, "basic_string::assign"),
4471 : std::__sv_limit(__sv.size(), __pos, __n));
4472 : }
4473 : #endif // C++17
4474 :
4475 : /**
4476 : * @brief Insert multiple characters.
4477 : * @param __p Iterator referencing location in string to insert at.
4478 : * @param __n Number of characters to insert
4479 : * @param __c The character to insert.
4480 : * @throw std::length_error If new length exceeds @c max_size().
4481 : *
4482 : * Inserts @a __n copies of character @a __c starting at the
4483 : * position referenced by iterator @a __p. If adding
4484 : * characters causes the length to exceed max_size(),
4485 : * length_error is thrown. The value of the string doesn't
4486 : * change if an error is thrown.
4487 : */
4488 : void
4489 : insert(iterator __p, size_type __n, _CharT __c)
4490 : { this->replace(__p, __p, __n, __c); }
4491 :
4492 : /**
4493 : * @brief Insert a range of characters.
4494 : * @param __p Iterator referencing location in string to insert at.
4495 : * @param __beg Start of range.
4496 : * @param __end End of range.
4497 : * @throw std::length_error If new length exceeds @c max_size().
4498 : *
4499 : * Inserts characters in range [__beg,__end). If adding
4500 : * characters causes the length to exceed max_size(),
4501 : * length_error is thrown. The value of the string doesn't
4502 : * change if an error is thrown.
4503 : */
4504 : template<class _InputIterator>
4505 : void
4506 : insert(iterator __p, _InputIterator __beg, _InputIterator __end)
4507 : { this->replace(__p, __p, __beg, __end); }
4508 :
4509 : #if __cplusplus >= 201103L
4510 : /**
4511 : * @brief Insert an initializer_list of characters.
4512 : * @param __p Iterator referencing location in string to insert at.
4513 : * @param __l The initializer_list of characters to insert.
4514 : * @throw std::length_error If new length exceeds @c max_size().
4515 : */
4516 : void
4517 : insert(iterator __p, initializer_list<_CharT> __l)
4518 : {
4519 : _GLIBCXX_DEBUG_PEDASSERT(__p >= _M_ibegin() && __p <= _M_iend());
4520 : this->insert(__p - _M_ibegin(), __l.begin(), __l.size());
4521 : }
4522 : #endif // C++11
4523 :
4524 : /**
4525 : * @brief Insert value of a string.
4526 : * @param __pos1 Iterator referencing location in string to insert at.
4527 : * @param __str The string to insert.
4528 : * @return Reference to this string.
4529 : * @throw std::length_error If new length exceeds @c max_size().
4530 : *
4531 : * Inserts value of @a __str starting at @a __pos1. If adding
4532 : * characters causes the length to exceed max_size(),
4533 : * length_error is thrown. The value of the string doesn't
4534 : * change if an error is thrown.
4535 : */
4536 : basic_string&
4537 : insert(size_type __pos1, const basic_string& __str)
4538 : { return this->insert(__pos1, __str, size_type(0), __str.size()); }
4539 :
4540 : /**
4541 : * @brief Insert a substring.
4542 : * @param __pos1 Iterator referencing location in string to insert at.
4543 : * @param __str The string to insert.
4544 : * @param __pos2 Start of characters in str to insert.
4545 : * @param __n Number of characters to insert.
4546 : * @return Reference to this string.
4547 : * @throw std::length_error If new length exceeds @c max_size().
4548 : * @throw std::out_of_range If @a pos1 > size() or
4549 : * @a __pos2 > @a str.size().
4550 : *
4551 : * Starting at @a pos1, insert @a __n character of @a __str
4552 : * beginning with @a __pos2. If adding characters causes the
4553 : * length to exceed max_size(), length_error is thrown. If @a
4554 : * __pos1 is beyond the end of this string or @a __pos2 is
4555 : * beyond the end of @a __str, out_of_range is thrown. The
4556 : * value of the string doesn't change if an error is thrown.
4557 : */
4558 : basic_string&
4559 : insert(size_type __pos1, const basic_string& __str,
4560 : size_type __pos2, size_type __n = npos)
4561 : { return this->insert(__pos1, __str._M_data()
4562 : + __str._M_check(__pos2, "basic_string::insert"),
4563 : __str._M_limit(__pos2, __n)); }
4564 :
4565 : /**
4566 : * @brief Insert a C substring.
4567 : * @param __pos Iterator referencing location in string to insert at.
4568 : * @param __s The C string to insert.
4569 : * @param __n The number of characters to insert.
4570 : * @return Reference to this string.
4571 : * @throw std::length_error If new length exceeds @c max_size().
4572 : * @throw std::out_of_range If @a __pos is beyond the end of this
4573 : * string.
4574 : *
4575 : * Inserts the first @a __n characters of @a __s starting at @a
4576 : * __pos. If adding characters causes the length to exceed
4577 : * max_size(), length_error is thrown. If @a __pos is beyond
4578 : * end(), out_of_range is thrown. The value of the string
4579 : * doesn't change if an error is thrown.
4580 : */
4581 : basic_string&
4582 : insert(size_type __pos, const _CharT* __s, size_type __n);
4583 :
4584 : /**
4585 : * @brief Insert a C string.
4586 : * @param __pos Iterator referencing location in string to insert at.
4587 : * @param __s The C string to insert.
4588 : * @return Reference to this string.
4589 : * @throw std::length_error If new length exceeds @c max_size().
4590 : * @throw std::out_of_range If @a pos is beyond the end of this
4591 : * string.
4592 : *
4593 : * Inserts the first @a n characters of @a __s starting at @a __pos. If
4594 : * adding characters causes the length to exceed max_size(),
4595 : * length_error is thrown. If @a __pos is beyond end(), out_of_range is
4596 : * thrown. The value of the string doesn't change if an error is
4597 : * thrown.
4598 : */
4599 : basic_string&
4600 : insert(size_type __pos, const _CharT* __s)
4601 : {
4602 : __glibcxx_requires_string(__s);
4603 : return this->insert(__pos, __s, traits_type::length(__s));
4604 : }
4605 :
4606 : /**
4607 : * @brief Insert multiple characters.
4608 : * @param __pos Index in string to insert at.
4609 : * @param __n Number of characters to insert
4610 : * @param __c The character to insert.
4611 : * @return Reference to this string.
4612 : * @throw std::length_error If new length exceeds @c max_size().
4613 : * @throw std::out_of_range If @a __pos is beyond the end of this
4614 : * string.
4615 : *
4616 : * Inserts @a __n copies of character @a __c starting at index
4617 : * @a __pos. If adding characters causes the length to exceed
4618 : * max_size(), length_error is thrown. If @a __pos > length(),
4619 : * out_of_range is thrown. The value of the string doesn't
4620 : * change if an error is thrown.
4621 : */
4622 : basic_string&
4623 : insert(size_type __pos, size_type __n, _CharT __c)
4624 : { return _M_replace_aux(_M_check(__pos, "basic_string::insert"),
4625 : size_type(0), __n, __c); }
4626 :
4627 : /**
4628 : * @brief Insert one character.
4629 : * @param __p Iterator referencing position in string to insert at.
4630 : * @param __c The character to insert.
4631 : * @return Iterator referencing newly inserted char.
4632 : * @throw std::length_error If new length exceeds @c max_size().
4633 : *
4634 : * Inserts character @a __c at position referenced by @a __p.
4635 : * If adding character causes the length to exceed max_size(),
4636 : * length_error is thrown. If @a __p is beyond end of string,
4637 : * out_of_range is thrown. The value of the string doesn't
4638 : * change if an error is thrown.
4639 : */
4640 : iterator
4641 : insert(iterator __p, _CharT __c)
4642 : {
4643 : _GLIBCXX_DEBUG_PEDASSERT(__p >= _M_ibegin() && __p <= _M_iend());
4644 : const size_type __pos = __p - _M_ibegin();
4645 : _M_replace_aux(__pos, size_type(0), size_type(1), __c);
4646 : _M_rep()->_M_set_leaked();
4647 : return iterator(_M_data() + __pos);
4648 : }
4649 :
4650 : #if __cplusplus >= 201703L
4651 : /**
4652 : * @brief Insert a string_view.
4653 : * @param __pos Iterator referencing position in string to insert at.
4654 : * @param __svt The object convertible to string_view to insert.
4655 : * @return Reference to this string.
4656 : */
4657 : template<typename _Tp>
4658 : _If_sv<_Tp, basic_string&>
4659 : insert(size_type __pos, const _Tp& __svt)
4660 : {
4661 : __sv_type __sv = __svt;
4662 : return this->insert(__pos, __sv.data(), __sv.size());
4663 : }
4664 :
4665 : /**
4666 : * @brief Insert a string_view.
4667 : * @param __pos1 Position in string to insert at.
4668 : * @param __svt The object convertible to string_view to insert from.
4669 : * @param __pos2 Position in string_view to insert from.
4670 : * @param __n The number of characters to insert.
4671 : * @return Reference to this string.
4672 : */
4673 : template<typename _Tp>
4674 : _If_sv<_Tp, basic_string&>
4675 : insert(size_type __pos1, const _Tp& __svt,
4676 : size_type __pos2, size_type __n = npos)
4677 : {
4678 : __sv_type __sv = __svt;
4679 : return this->replace(__pos1, size_type(0), __sv.data()
4680 : + std::__sv_check(__sv.size(), __pos2, "basic_string::insert"),
4681 : std::__sv_limit(__sv.size(), __pos2, __n));
4682 : }
4683 : #endif // C++17
4684 :
4685 : /**
4686 : * @brief Remove characters.
4687 : * @param __pos Index of first character to remove (default 0).
4688 : * @param __n Number of characters to remove (default remainder).
4689 : * @return Reference to this string.
4690 : * @throw std::out_of_range If @a pos is beyond the end of this
4691 : * string.
4692 : *
4693 : * Removes @a __n characters from this string starting at @a
4694 : * __pos. The length of the string is reduced by @a __n. If
4695 : * there are < @a __n characters to remove, the remainder of
4696 : * the string is truncated. If @a __p is beyond end of string,
4697 : * out_of_range is thrown. The value of the string doesn't
4698 : * change if an error is thrown.
4699 : */
4700 : basic_string&
4701 : erase(size_type __pos = 0, size_type __n = npos)
4702 : {
4703 : _M_mutate(_M_check(__pos, "basic_string::erase"),
4704 : _M_limit(__pos, __n), size_type(0));
4705 : return *this;
4706 : }
4707 :
4708 : /**
4709 : * @brief Remove one character.
4710 : * @param __position Iterator referencing the character to remove.
4711 : * @return iterator referencing same location after removal.
4712 : *
4713 : * Removes the character at @a __position from this string. The value
4714 : * of the string doesn't change if an error is thrown.
4715 : */
4716 : iterator
4717 : erase(iterator __position)
4718 : {
4719 : _GLIBCXX_DEBUG_PEDASSERT(__position >= _M_ibegin()
4720 : && __position < _M_iend());
4721 : const size_type __pos = __position - _M_ibegin();
4722 : _M_mutate(__pos, size_type(1), size_type(0));
4723 : _M_rep()->_M_set_leaked();
4724 : return iterator(_M_data() + __pos);
4725 : }
4726 :
4727 : /**
4728 : * @brief Remove a range of characters.
4729 : * @param __first Iterator referencing the first character to remove.
4730 : * @param __last Iterator referencing the end of the range.
4731 : * @return Iterator referencing location of first after removal.
4732 : *
4733 : * Removes the characters in the range [first,last) from this string.
4734 : * The value of the string doesn't change if an error is thrown.
4735 : */
4736 : iterator
4737 : erase(iterator __first, iterator __last);
4738 :
4739 : #if __cplusplus >= 201103L
4740 : /**
4741 : * @brief Remove the last character.
4742 : *
4743 : * The string must be non-empty.
4744 : */
4745 : void
4746 : pop_back() // FIXME C++11: should be noexcept.
4747 : {
4748 : __glibcxx_assert(!empty());
4749 : erase(size() - 1, 1);
4750 : }
4751 : #endif // C++11
4752 :
4753 : /**
4754 : * @brief Replace characters with value from another string.
4755 : * @param __pos Index of first character to replace.
4756 : * @param __n Number of characters to be replaced.
4757 : * @param __str String to insert.
4758 : * @return Reference to this string.
4759 : * @throw std::out_of_range If @a pos is beyond the end of this
4760 : * string.
4761 : * @throw std::length_error If new length exceeds @c max_size().
4762 : *
4763 : * Removes the characters in the range [__pos,__pos+__n) from
4764 : * this string. In place, the value of @a __str is inserted.
4765 : * If @a __pos is beyond end of string, out_of_range is thrown.
4766 : * If the length of the result exceeds max_size(), length_error
4767 : * is thrown. The value of the string doesn't change if an
4768 : * error is thrown.
4769 : */
4770 : basic_string&
4771 : replace(size_type __pos, size_type __n, const basic_string& __str)
4772 : { return this->replace(__pos, __n, __str._M_data(), __str.size()); }
4773 :
4774 : /**
4775 : * @brief Replace characters with value from another string.
4776 : * @param __pos1 Index of first character to replace.
4777 : * @param __n1 Number of characters to be replaced.
4778 : * @param __str String to insert.
4779 : * @param __pos2 Index of first character of str to use.
4780 : * @param __n2 Number of characters from str to use.
4781 : * @return Reference to this string.
4782 : * @throw std::out_of_range If @a __pos1 > size() or @a __pos2 >
4783 : * __str.size().
4784 : * @throw std::length_error If new length exceeds @c max_size().
4785 : *
4786 : * Removes the characters in the range [__pos1,__pos1 + n) from this
4787 : * string. In place, the value of @a __str is inserted. If @a __pos is
4788 : * beyond end of string, out_of_range is thrown. If the length of the
4789 : * result exceeds max_size(), length_error is thrown. The value of the
4790 : * string doesn't change if an error is thrown.
4791 : */
4792 : basic_string&
4793 : replace(size_type __pos1, size_type __n1, const basic_string& __str,
4794 : size_type __pos2, size_type __n2 = npos)
4795 : { return this->replace(__pos1, __n1, __str._M_data()
4796 : + __str._M_check(__pos2, "basic_string::replace"),
4797 : __str._M_limit(__pos2, __n2)); }
4798 :
4799 : /**
4800 : * @brief Replace characters with value of a C substring.
4801 : * @param __pos Index of first character to replace.
4802 : * @param __n1 Number of characters to be replaced.
4803 : * @param __s C string to insert.
4804 : * @param __n2 Number of characters from @a s to use.
4805 : * @return Reference to this string.
4806 : * @throw std::out_of_range If @a pos1 > size().
4807 : * @throw std::length_error If new length exceeds @c max_size().
4808 : *
4809 : * Removes the characters in the range [__pos,__pos + __n1)
4810 : * from this string. In place, the first @a __n2 characters of
4811 : * @a __s are inserted, or all of @a __s if @a __n2 is too large. If
4812 : * @a __pos is beyond end of string, out_of_range is thrown. If
4813 : * the length of result exceeds max_size(), length_error is
4814 : * thrown. The value of the string doesn't change if an error
4815 : * is thrown.
4816 : */
4817 : basic_string&
4818 : replace(size_type __pos, size_type __n1, const _CharT* __s,
4819 : size_type __n2);
4820 :
4821 : /**
4822 : * @brief Replace characters with value of a C string.
4823 : * @param __pos Index of first character to replace.
4824 : * @param __n1 Number of characters to be replaced.
4825 : * @param __s C string to insert.
4826 : * @return Reference to this string.
4827 : * @throw std::out_of_range If @a pos > size().
4828 : * @throw std::length_error If new length exceeds @c max_size().
4829 : *
4830 : * Removes the characters in the range [__pos,__pos + __n1)
4831 : * from this string. In place, the characters of @a __s are
4832 : * inserted. If @a __pos is beyond end of string, out_of_range
4833 : * is thrown. If the length of result exceeds max_size(),
4834 : * length_error is thrown. The value of the string doesn't
4835 : * change if an error is thrown.
4836 : */
4837 : basic_string&
4838 : replace(size_type __pos, size_type __n1, const _CharT* __s)
4839 : {
4840 : __glibcxx_requires_string(__s);
4841 : return this->replace(__pos, __n1, __s, traits_type::length(__s));
4842 : }
4843 :
4844 : /**
4845 : * @brief Replace characters with multiple characters.
4846 : * @param __pos Index of first character to replace.
4847 : * @param __n1 Number of characters to be replaced.
4848 : * @param __n2 Number of characters to insert.
4849 : * @param __c Character to insert.
4850 : * @return Reference to this string.
4851 : * @throw std::out_of_range If @a __pos > size().
4852 : * @throw std::length_error If new length exceeds @c max_size().
4853 : *
4854 : * Removes the characters in the range [pos,pos + n1) from this
4855 : * string. In place, @a __n2 copies of @a __c are inserted.
4856 : * If @a __pos is beyond end of string, out_of_range is thrown.
4857 : * If the length of result exceeds max_size(), length_error is
4858 : * thrown. The value of the string doesn't change if an error
4859 : * is thrown.
4860 : */
4861 : basic_string&
4862 : replace(size_type __pos, size_type __n1, size_type __n2, _CharT __c)
4863 : { return _M_replace_aux(_M_check(__pos, "basic_string::replace"),
4864 : _M_limit(__pos, __n1), __n2, __c); }
4865 :
4866 : /**
4867 : * @brief Replace range of characters with string.
4868 : * @param __i1 Iterator referencing start of range to replace.
4869 : * @param __i2 Iterator referencing end of range to replace.
4870 : * @param __str String value to insert.
4871 : * @return Reference to this string.
4872 : * @throw std::length_error If new length exceeds @c max_size().
4873 : *
4874 : * Removes the characters in the range [__i1,__i2). In place,
4875 : * the value of @a __str is inserted. If the length of result
4876 : * exceeds max_size(), length_error is thrown. The value of
4877 : * the string doesn't change if an error is thrown.
4878 : */
4879 : basic_string&
4880 : replace(iterator __i1, iterator __i2, const basic_string& __str)
4881 : { return this->replace(__i1, __i2, __str._M_data(), __str.size()); }
4882 :
4883 : /**
4884 : * @brief Replace range of characters with C substring.
4885 : * @param __i1 Iterator referencing start of range to replace.
4886 : * @param __i2 Iterator referencing end of range to replace.
4887 : * @param __s C string value to insert.
4888 : * @param __n Number of characters from s to insert.
4889 : * @return Reference to this string.
4890 : * @throw std::length_error If new length exceeds @c max_size().
4891 : *
4892 : * Removes the characters in the range [__i1,__i2). In place,
4893 : * the first @a __n characters of @a __s are inserted. If the
4894 : * length of result exceeds max_size(), length_error is thrown.
4895 : * The value of the string doesn't change if an error is
4896 : * thrown.
4897 : */
4898 : basic_string&
4899 : replace(iterator __i1, iterator __i2, const _CharT* __s, size_type __n)
4900 : {
4901 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
4902 : && __i2 <= _M_iend());
4903 : return this->replace(__i1 - _M_ibegin(), __i2 - __i1, __s, __n);
4904 : }
4905 :
4906 : /**
4907 : * @brief Replace range of characters with C string.
4908 : * @param __i1 Iterator referencing start of range to replace.
4909 : * @param __i2 Iterator referencing end of range to replace.
4910 : * @param __s C string value to insert.
4911 : * @return Reference to this string.
4912 : * @throw std::length_error If new length exceeds @c max_size().
4913 : *
4914 : * Removes the characters in the range [__i1,__i2). In place,
4915 : * the characters of @a __s are inserted. If the length of
4916 : * result exceeds max_size(), length_error is thrown. The
4917 : * value of the string doesn't change if an error is thrown.
4918 : */
4919 : basic_string&
4920 : replace(iterator __i1, iterator __i2, const _CharT* __s)
4921 : {
4922 : __glibcxx_requires_string(__s);
4923 : return this->replace(__i1, __i2, __s, traits_type::length(__s));
4924 : }
4925 :
4926 : /**
4927 : * @brief Replace range of characters with multiple characters
4928 : * @param __i1 Iterator referencing start of range to replace.
4929 : * @param __i2 Iterator referencing end of range to replace.
4930 : * @param __n Number of characters to insert.
4931 : * @param __c Character to insert.
4932 : * @return Reference to this string.
4933 : * @throw std::length_error If new length exceeds @c max_size().
4934 : *
4935 : * Removes the characters in the range [__i1,__i2). In place,
4936 : * @a __n copies of @a __c are inserted. If the length of
4937 : * result exceeds max_size(), length_error is thrown. The
4938 : * value of the string doesn't change if an error is thrown.
4939 : */
4940 : basic_string&
4941 : replace(iterator __i1, iterator __i2, size_type __n, _CharT __c)
4942 : {
4943 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
4944 : && __i2 <= _M_iend());
4945 : return _M_replace_aux(__i1 - _M_ibegin(), __i2 - __i1, __n, __c);
4946 : }
4947 :
4948 : /**
4949 : * @brief Replace range of characters with range.
4950 : * @param __i1 Iterator referencing start of range to replace.
4951 : * @param __i2 Iterator referencing end of range to replace.
4952 : * @param __k1 Iterator referencing start of range to insert.
4953 : * @param __k2 Iterator referencing end of range to insert.
4954 : * @return Reference to this string.
4955 : * @throw std::length_error If new length exceeds @c max_size().
4956 : *
4957 : * Removes the characters in the range [__i1,__i2). In place,
4958 : * characters in the range [__k1,__k2) are inserted. If the
4959 : * length of result exceeds max_size(), length_error is thrown.
4960 : * The value of the string doesn't change if an error is
4961 : * thrown.
4962 : */
4963 : template<class _InputIterator>
4964 : basic_string&
4965 : replace(iterator __i1, iterator __i2,
4966 : _InputIterator __k1, _InputIterator __k2)
4967 : {
4968 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
4969 : && __i2 <= _M_iend());
4970 : __glibcxx_requires_valid_range(__k1, __k2);
4971 : typedef typename std::__is_integer<_InputIterator>::__type _Integral;
4972 : return _M_replace_dispatch(__i1, __i2, __k1, __k2, _Integral());
4973 : }
4974 :
4975 : // Specializations for the common case of pointer and iterator:
4976 : // useful to avoid the overhead of temporary buffering in _M_replace.
4977 : basic_string&
4978 : replace(iterator __i1, iterator __i2, _CharT* __k1, _CharT* __k2)
4979 : {
4980 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
4981 : && __i2 <= _M_iend());
4982 : __glibcxx_requires_valid_range(__k1, __k2);
4983 : return this->replace(__i1 - _M_ibegin(), __i2 - __i1,
4984 : __k1, __k2 - __k1);
4985 : }
4986 :
4987 : basic_string&
4988 : replace(iterator __i1, iterator __i2,
4989 : const _CharT* __k1, const _CharT* __k2)
4990 : {
4991 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
4992 : && __i2 <= _M_iend());
4993 : __glibcxx_requires_valid_range(__k1, __k2);
4994 : return this->replace(__i1 - _M_ibegin(), __i2 - __i1,
4995 : __k1, __k2 - __k1);
4996 : }
4997 :
4998 : basic_string&
4999 : replace(iterator __i1, iterator __i2, iterator __k1, iterator __k2)
5000 : {
5001 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
5002 : && __i2 <= _M_iend());
5003 : __glibcxx_requires_valid_range(__k1, __k2);
5004 : return this->replace(__i1 - _M_ibegin(), __i2 - __i1,
5005 : __k1.base(), __k2 - __k1);
5006 : }
5007 :
5008 : basic_string&
5009 : replace(iterator __i1, iterator __i2,
5010 : const_iterator __k1, const_iterator __k2)
5011 : {
5012 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
5013 : && __i2 <= _M_iend());
5014 : __glibcxx_requires_valid_range(__k1, __k2);
5015 : return this->replace(__i1 - _M_ibegin(), __i2 - __i1,
5016 : __k1.base(), __k2 - __k1);
5017 : }
5018 :
5019 : #if __cplusplus >= 201103L
5020 : /**
5021 : * @brief Replace range of characters with initializer_list.
5022 : * @param __i1 Iterator referencing start of range to replace.
5023 : * @param __i2 Iterator referencing end of range to replace.
5024 : * @param __l The initializer_list of characters to insert.
5025 : * @return Reference to this string.
5026 : * @throw std::length_error If new length exceeds @c max_size().
5027 : *
5028 : * Removes the characters in the range [__i1,__i2). In place,
5029 : * characters in the range [__k1,__k2) are inserted. If the
5030 : * length of result exceeds max_size(), length_error is thrown.
5031 : * The value of the string doesn't change if an error is
5032 : * thrown.
5033 : */
5034 : basic_string& replace(iterator __i1, iterator __i2,
5035 : initializer_list<_CharT> __l)
5036 : { return this->replace(__i1, __i2, __l.begin(), __l.end()); }
5037 : #endif // C++11
5038 :
5039 : #if __cplusplus >= 201703L
5040 : /**
5041 : * @brief Replace range of characters with string_view.
5042 : * @param __pos The position to replace at.
5043 : * @param __n The number of characters to replace.
5044 : * @param __svt The object convertible to string_view to insert.
5045 : * @return Reference to this string.
5046 : */
5047 : template<typename _Tp>
5048 : _If_sv<_Tp, basic_string&>
5049 : replace(size_type __pos, size_type __n, const _Tp& __svt)
5050 : {
5051 : __sv_type __sv = __svt;
5052 : return this->replace(__pos, __n, __sv.data(), __sv.size());
5053 : }
5054 :
5055 : /**
5056 : * @brief Replace range of characters with string_view.
5057 : * @param __pos1 The position to replace at.
5058 : * @param __n1 The number of characters to replace.
5059 : * @param __svt The object convertible to string_view to insert from.
5060 : * @param __pos2 The position in the string_view to insert from.
5061 : * @param __n2 The number of characters to insert.
5062 : * @return Reference to this string.
5063 : */
5064 : template<typename _Tp>
5065 : _If_sv<_Tp, basic_string&>
5066 : replace(size_type __pos1, size_type __n1, const _Tp& __svt,
5067 : size_type __pos2, size_type __n2 = npos)
5068 : {
5069 : __sv_type __sv = __svt;
5070 : return this->replace(__pos1, __n1,
5071 : __sv.data()
5072 : + std::__sv_check(__sv.size(), __pos2, "basic_string::replace"),
5073 : std::__sv_limit(__sv.size(), __pos2, __n2));
5074 : }
5075 :
5076 : /**
5077 : * @brief Replace range of characters with string_view.
5078 : * @param __i1 An iterator referencing the start position
5079 : to replace at.
5080 : * @param __i2 An iterator referencing the end position
5081 : for the replace.
5082 : * @param __svt The object convertible to string_view to insert from.
5083 : * @return Reference to this string.
5084 : */
5085 : template<typename _Tp>
5086 : _If_sv<_Tp, basic_string&>
5087 : replace(const_iterator __i1, const_iterator __i2, const _Tp& __svt)
5088 : {
5089 : __sv_type __sv = __svt;
5090 : return this->replace(__i1 - begin(), __i2 - __i1, __sv);
5091 : }
5092 : #endif // C++17
5093 :
5094 : private:
5095 : template<class _Integer>
5096 : basic_string&
5097 : _M_replace_dispatch(iterator __i1, iterator __i2, _Integer __n,
5098 : _Integer __val, __true_type)
5099 : { return _M_replace_aux(__i1 - _M_ibegin(), __i2 - __i1, __n, __val); }
5100 :
5101 : template<class _InputIterator>
5102 : basic_string&
5103 : _M_replace_dispatch(iterator __i1, iterator __i2, _InputIterator __k1,
5104 : _InputIterator __k2, __false_type);
5105 :
5106 : basic_string&
5107 : _M_replace_aux(size_type __pos1, size_type __n1, size_type __n2,
5108 : _CharT __c);
5109 :
5110 : basic_string&
5111 : _M_replace_safe(size_type __pos1, size_type __n1, const _CharT* __s,
5112 : size_type __n2);
5113 :
5114 : // _S_construct_aux is used to implement the 21.3.1 para 15 which
5115 : // requires special behaviour if _InIter is an integral type
5116 : template<class _InIterator>
5117 : static _CharT*
5118 : _S_construct_aux(_InIterator __beg, _InIterator __end,
5119 : const _Alloc& __a, __false_type)
5120 : {
5121 : typedef typename iterator_traits<_InIterator>::iterator_category _Tag;
5122 : return _S_construct(__beg, __end, __a, _Tag());
5123 : }
5124 :
5125 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
5126 : // 438. Ambiguity in the "do the right thing" clause
5127 : template<class _Integer>
5128 : static _CharT*
5129 : _S_construct_aux(_Integer __beg, _Integer __end,
5130 : const _Alloc& __a, __true_type)
5131 : { return _S_construct_aux_2(static_cast<size_type>(__beg),
5132 : __end, __a); }
5133 :
5134 : static _CharT*
5135 : _S_construct_aux_2(size_type __req, _CharT __c, const _Alloc& __a)
5136 : { return _S_construct(__req, __c, __a); }
5137 :
5138 : template<class _InIterator>
5139 : static _CharT*
5140 : _S_construct(_InIterator __beg, _InIterator __end, const _Alloc& __a)
5141 : {
5142 : typedef typename std::__is_integer<_InIterator>::__type _Integral;
5143 : return _S_construct_aux(__beg, __end, __a, _Integral());
5144 : }
5145 :
5146 : // For Input Iterators, used in istreambuf_iterators, etc.
5147 : template<class _InIterator>
5148 : static _CharT*
5149 : _S_construct(_InIterator __beg, _InIterator __end, const _Alloc& __a,
5150 : input_iterator_tag);
5151 :
5152 : // For forward_iterators up to random_access_iterators, used for
5153 : // string::iterator, _CharT*, etc.
5154 : template<class _FwdIterator>
5155 : static _CharT*
5156 : _S_construct(_FwdIterator __beg, _FwdIterator __end, const _Alloc& __a,
5157 : forward_iterator_tag);
5158 :
5159 : static _CharT*
5160 : _S_construct(size_type __req, _CharT __c, const _Alloc& __a);
5161 :
5162 : public:
5163 :
5164 : /**
5165 : * @brief Copy substring into C string.
5166 : * @param __s C string to copy value into.
5167 : * @param __n Number of characters to copy.
5168 : * @param __pos Index of first character to copy.
5169 : * @return Number of characters actually copied
5170 : * @throw std::out_of_range If __pos > size().
5171 : *
5172 : * Copies up to @a __n characters starting at @a __pos into the
5173 : * C string @a __s. If @a __pos is %greater than size(),
5174 : * out_of_range is thrown.
5175 : */
5176 : size_type
5177 : copy(_CharT* __s, size_type __n, size_type __pos = 0) const;
5178 :
5179 : /**
5180 : * @brief Swap contents with another string.
5181 : * @param __s String to swap with.
5182 : *
5183 : * Exchanges the contents of this string with that of @a __s in constant
5184 : * time.
5185 : */
5186 : void
5187 : swap(basic_string& __s)
5188 : _GLIBCXX_NOEXCEPT_IF(allocator_traits<_Alloc>::is_always_equal::value);
5189 :
5190 : // String operations:
5191 : /**
5192 : * @brief Return const pointer to null-terminated contents.
5193 : *
5194 : * This is a handle to internal data. Do not modify or dire things may
5195 : * happen.
5196 : */
5197 : const _CharT*
5198 : c_str() const _GLIBCXX_NOEXCEPT
5199 : { return _M_data(); }
5200 :
5201 : /**
5202 : * @brief Return const pointer to contents.
5203 : *
5204 : * This is a pointer to internal data. It is undefined to modify
5205 : * the contents through the returned pointer. To get a pointer that
5206 : * allows modifying the contents use @c &str[0] instead,
5207 : * (or in C++17 the non-const @c str.data() overload).
5208 : */
5209 : const _CharT*
5210 : data() const _GLIBCXX_NOEXCEPT
5211 : { return _M_data(); }
5212 :
5213 : #if __cplusplus >= 201703L
5214 : /**
5215 : * @brief Return non-const pointer to contents.
5216 : *
5217 : * This is a pointer to the character sequence held by the string.
5218 : * Modifying the characters in the sequence is allowed.
5219 : */
5220 : _CharT*
5221 : data() noexcept
5222 : {
5223 : _M_leak();
5224 : return _M_data();
5225 : }
5226 : #endif
5227 :
5228 : /**
5229 : * @brief Return copy of allocator used to construct this string.
5230 : */
5231 : allocator_type
5232 : get_allocator() const _GLIBCXX_NOEXCEPT
5233 : { return _M_dataplus; }
5234 :
5235 : /**
5236 : * @brief Find position of a C substring.
5237 : * @param __s C string to locate.
5238 : * @param __pos Index of character to search from.
5239 : * @param __n Number of characters from @a s to search for.
5240 : * @return Index of start of first occurrence.
5241 : *
5242 : * Starting from @a __pos, searches forward for the first @a
5243 : * __n characters in @a __s within this string. If found,
5244 : * returns the index where it begins. If not found, returns
5245 : * npos.
5246 : */
5247 : size_type
5248 : find(const _CharT* __s, size_type __pos, size_type __n) const
5249 : _GLIBCXX_NOEXCEPT;
5250 :
5251 : /**
5252 : * @brief Find position of a string.
5253 : * @param __str String to locate.
5254 : * @param __pos Index of character to search from (default 0).
5255 : * @return Index of start of first occurrence.
5256 : *
5257 : * Starting from @a __pos, searches forward for value of @a __str within
5258 : * this string. If found, returns the index where it begins. If not
5259 : * found, returns npos.
5260 : */
5261 : size_type
5262 : find(const basic_string& __str, size_type __pos = 0) const
5263 : _GLIBCXX_NOEXCEPT
5264 : { return this->find(__str.data(), __pos, __str.size()); }
5265 :
5266 : /**
5267 : * @brief Find position of a C string.
5268 : * @param __s C string to locate.
5269 : * @param __pos Index of character to search from (default 0).
5270 : * @return Index of start of first occurrence.
5271 : *
5272 : * Starting from @a __pos, searches forward for the value of @a
5273 : * __s within this string. If found, returns the index where
5274 : * it begins. If not found, returns npos.
5275 : */
5276 : size_type
5277 : find(const _CharT* __s, size_type __pos = 0) const _GLIBCXX_NOEXCEPT
5278 : {
5279 : __glibcxx_requires_string(__s);
5280 : return this->find(__s, __pos, traits_type::length(__s));
5281 : }
5282 :
5283 : /**
5284 : * @brief Find position of a character.
5285 : * @param __c Character to locate.
5286 : * @param __pos Index of character to search from (default 0).
5287 : * @return Index of first occurrence.
5288 : *
5289 : * Starting from @a __pos, searches forward for @a __c within
5290 : * this string. If found, returns the index where it was
5291 : * found. If not found, returns npos.
5292 : */
5293 : size_type
5294 : find(_CharT __c, size_type __pos = 0) const _GLIBCXX_NOEXCEPT;
5295 :
5296 : #if __cplusplus >= 201703L
5297 : /**
5298 : * @brief Find position of a string_view.
5299 : * @param __svt The object convertible to string_view to locate.
5300 : * @param __pos Index of character to search from (default 0).
5301 : * @return Index of start of first occurrence.
5302 : */
5303 : template<typename _Tp>
5304 : _If_sv<_Tp, size_type>
5305 : find(const _Tp& __svt, size_type __pos = 0) const
5306 : noexcept(is_same<_Tp, __sv_type>::value)
5307 : {
5308 : __sv_type __sv = __svt;
5309 : return this->find(__sv.data(), __pos, __sv.size());
5310 : }
5311 : #endif // C++17
5312 :
5313 : /**
5314 : * @brief Find last position of a string.
5315 : * @param __str String to locate.
5316 : * @param __pos Index of character to search back from (default end).
5317 : * @return Index of start of last occurrence.
5318 : *
5319 : * Starting from @a __pos, searches backward for value of @a
5320 : * __str within this string. If found, returns the index where
5321 : * it begins. If not found, returns npos.
5322 : */
5323 : size_type
5324 : rfind(const basic_string& __str, size_type __pos = npos) const
5325 : _GLIBCXX_NOEXCEPT
5326 : { return this->rfind(__str.data(), __pos, __str.size()); }
5327 :
5328 : /**
5329 : * @brief Find last position of a C substring.
5330 : * @param __s C string to locate.
5331 : * @param __pos Index of character to search back from.
5332 : * @param __n Number of characters from s to search for.
5333 : * @return Index of start of last occurrence.
5334 : *
5335 : * Starting from @a __pos, searches backward for the first @a
5336 : * __n characters in @a __s within this string. If found,
5337 : * returns the index where it begins. If not found, returns
5338 : * npos.
5339 : */
5340 : size_type
5341 : rfind(const _CharT* __s, size_type __pos, size_type __n) const
5342 : _GLIBCXX_NOEXCEPT;
5343 :
5344 : /**
5345 : * @brief Find last position of a C string.
5346 : * @param __s C string to locate.
5347 : * @param __pos Index of character to start search at (default end).
5348 : * @return Index of start of last occurrence.
5349 : *
5350 : * Starting from @a __pos, searches backward for the value of
5351 : * @a __s within this string. If found, returns the index
5352 : * where it begins. If not found, returns npos.
5353 : */
5354 : size_type
5355 : rfind(const _CharT* __s, size_type __pos = npos) const _GLIBCXX_NOEXCEPT
5356 : {
5357 : __glibcxx_requires_string(__s);
5358 : return this->rfind(__s, __pos, traits_type::length(__s));
5359 : }
5360 :
5361 : /**
5362 : * @brief Find last position of a character.
5363 : * @param __c Character to locate.
5364 : * @param __pos Index of character to search back from (default end).
5365 : * @return Index of last occurrence.
5366 : *
5367 : * Starting from @a __pos, searches backward for @a __c within
5368 : * this string. If found, returns the index where it was
5369 : * found. If not found, returns npos.
5370 : */
5371 : size_type
5372 : rfind(_CharT __c, size_type __pos = npos) const _GLIBCXX_NOEXCEPT;
5373 :
5374 : #if __cplusplus >= 201703L
5375 : /**
5376 : * @brief Find last position of a string_view.
5377 : * @param __svt The object convertible to string_view to locate.
5378 : * @param __pos Index of character to search back from (default end).
5379 : * @return Index of start of last occurrence.
5380 : */
5381 : template<typename _Tp>
5382 : _If_sv<_Tp, size_type>
5383 : rfind(const _Tp& __svt, size_type __pos = npos) const
5384 : noexcept(is_same<_Tp, __sv_type>::value)
5385 : {
5386 : __sv_type __sv = __svt;
5387 : return this->rfind(__sv.data(), __pos, __sv.size());
5388 : }
5389 : #endif // C++17
5390 :
5391 : /**
5392 : * @brief Find position of a character of string.
5393 : * @param __str String containing characters to locate.
5394 : * @param __pos Index of character to search from (default 0).
5395 : * @return Index of first occurrence.
5396 : *
5397 : * Starting from @a __pos, searches forward for one of the
5398 : * characters of @a __str within this string. If found,
5399 : * returns the index where it was found. If not found, returns
5400 : * npos.
5401 : */
5402 : size_type
5403 : find_first_of(const basic_string& __str, size_type __pos = 0) const
5404 : _GLIBCXX_NOEXCEPT
5405 : { return this->find_first_of(__str.data(), __pos, __str.size()); }
5406 :
5407 : /**
5408 : * @brief Find position of a character of C substring.
5409 : * @param __s String containing characters to locate.
5410 : * @param __pos Index of character to search from.
5411 : * @param __n Number of characters from s to search for.
5412 : * @return Index of first occurrence.
5413 : *
5414 : * Starting from @a __pos, searches forward for one of the
5415 : * first @a __n characters of @a __s within this string. If
5416 : * found, returns the index where it was found. If not found,
5417 : * returns npos.
5418 : */
5419 : size_type
5420 : find_first_of(const _CharT* __s, size_type __pos, size_type __n) const
5421 : _GLIBCXX_NOEXCEPT;
5422 :
5423 : /**
5424 : * @brief Find position of a character of C string.
5425 : * @param __s String containing characters to locate.
5426 : * @param __pos Index of character to search from (default 0).
5427 : * @return Index of first occurrence.
5428 : *
5429 : * Starting from @a __pos, searches forward for one of the
5430 : * characters of @a __s within this string. If found, returns
5431 : * the index where it was found. If not found, returns npos.
5432 : */
5433 : size_type
5434 : find_first_of(const _CharT* __s, size_type __pos = 0) const
5435 : _GLIBCXX_NOEXCEPT
5436 : {
5437 : __glibcxx_requires_string(__s);
5438 : return this->find_first_of(__s, __pos, traits_type::length(__s));
5439 : }
5440 :
5441 : /**
5442 : * @brief Find position of a character.
5443 : * @param __c Character to locate.
5444 : * @param __pos Index of character to search from (default 0).
5445 : * @return Index of first occurrence.
5446 : *
5447 : * Starting from @a __pos, searches forward for the character
5448 : * @a __c within this string. If found, returns the index
5449 : * where it was found. If not found, returns npos.
5450 : *
5451 : * Note: equivalent to find(__c, __pos).
5452 : */
5453 : size_type
5454 : find_first_of(_CharT __c, size_type __pos = 0) const _GLIBCXX_NOEXCEPT
5455 : { return this->find(__c, __pos); }
5456 :
5457 : #if __cplusplus >= 201703L
5458 : /**
5459 : * @brief Find position of a character of a string_view.
5460 : * @param __svt An object convertible to string_view containing
5461 : * characters to locate.
5462 : * @param __pos Index of character to search from (default 0).
5463 : * @return Index of first occurrence.
5464 : */
5465 : template<typename _Tp>
5466 : _If_sv<_Tp, size_type>
5467 : find_first_of(const _Tp& __svt, size_type __pos = 0) const
5468 : noexcept(is_same<_Tp, __sv_type>::value)
5469 : {
5470 : __sv_type __sv = __svt;
5471 : return this->find_first_of(__sv.data(), __pos, __sv.size());
5472 : }
5473 : #endif // C++17
5474 :
5475 : /**
5476 : * @brief Find last position of a character of string.
5477 : * @param __str String containing characters to locate.
5478 : * @param __pos Index of character to search back from (default end).
5479 : * @return Index of last occurrence.
5480 : *
5481 : * Starting from @a __pos, searches backward for one of the
5482 : * characters of @a __str within this string. If found,
5483 : * returns the index where it was found. If not found, returns
5484 : * npos.
5485 : */
5486 : size_type
5487 : find_last_of(const basic_string& __str, size_type __pos = npos) const
5488 : _GLIBCXX_NOEXCEPT
5489 : { return this->find_last_of(__str.data(), __pos, __str.size()); }
5490 :
5491 : /**
5492 : * @brief Find last position of a character of C substring.
5493 : * @param __s C string containing characters to locate.
5494 : * @param __pos Index of character to search back from.
5495 : * @param __n Number of characters from s to search for.
5496 : * @return Index of last occurrence.
5497 : *
5498 : * Starting from @a __pos, searches backward for one of the
5499 : * first @a __n characters of @a __s within this string. If
5500 : * found, returns the index where it was found. If not found,
5501 : * returns npos.
5502 : */
5503 : size_type
5504 : find_last_of(const _CharT* __s, size_type __pos, size_type __n) const
5505 : _GLIBCXX_NOEXCEPT;
5506 :
5507 : /**
5508 : * @brief Find last position of a character of C string.
5509 : * @param __s C string containing characters to locate.
5510 : * @param __pos Index of character to search back from (default end).
5511 : * @return Index of last occurrence.
5512 : *
5513 : * Starting from @a __pos, searches backward for one of the
5514 : * characters of @a __s within this string. If found, returns
5515 : * the index where it was found. If not found, returns npos.
5516 : */
5517 : size_type
5518 : find_last_of(const _CharT* __s, size_type __pos = npos) const
5519 : _GLIBCXX_NOEXCEPT
5520 : {
5521 : __glibcxx_requires_string(__s);
5522 : return this->find_last_of(__s, __pos, traits_type::length(__s));
5523 : }
5524 :
5525 : /**
5526 : * @brief Find last position of a character.
5527 : * @param __c Character to locate.
5528 : * @param __pos Index of character to search back from (default end).
5529 : * @return Index of last occurrence.
5530 : *
5531 : * Starting from @a __pos, searches backward for @a __c within
5532 : * this string. If found, returns the index where it was
5533 : * found. If not found, returns npos.
5534 : *
5535 : * Note: equivalent to rfind(__c, __pos).
5536 : */
5537 : size_type
5538 : find_last_of(_CharT __c, size_type __pos = npos) const _GLIBCXX_NOEXCEPT
5539 : { return this->rfind(__c, __pos); }
5540 :
5541 : #if __cplusplus >= 201703L
5542 : /**
5543 : * @brief Find last position of a character of string.
5544 : * @param __svt An object convertible to string_view containing
5545 : * characters to locate.
5546 : * @param __pos Index of character to search back from (default end).
5547 : * @return Index of last occurrence.
5548 : */
5549 : template<typename _Tp>
5550 : _If_sv<_Tp, size_type>
5551 : find_last_of(const _Tp& __svt, size_type __pos = npos) const
5552 : noexcept(is_same<_Tp, __sv_type>::value)
5553 : {
5554 : __sv_type __sv = __svt;
5555 : return this->find_last_of(__sv.data(), __pos, __sv.size());
5556 : }
5557 : #endif // C++17
5558 :
5559 : /**
5560 : * @brief Find position of a character not in string.
5561 : * @param __str String containing characters to avoid.
5562 : * @param __pos Index of character to search from (default 0).
5563 : * @return Index of first occurrence.
5564 : *
5565 : * Starting from @a __pos, searches forward for a character not contained
5566 : * in @a __str within this string. If found, returns the index where it
5567 : * was found. If not found, returns npos.
5568 : */
5569 : size_type
5570 : find_first_not_of(const basic_string& __str, size_type __pos = 0) const
5571 : _GLIBCXX_NOEXCEPT
5572 : { return this->find_first_not_of(__str.data(), __pos, __str.size()); }
5573 :
5574 : /**
5575 : * @brief Find position of a character not in C substring.
5576 : * @param __s C string containing characters to avoid.
5577 : * @param __pos Index of character to search from.
5578 : * @param __n Number of characters from __s to consider.
5579 : * @return Index of first occurrence.
5580 : *
5581 : * Starting from @a __pos, searches forward for a character not
5582 : * contained in the first @a __n characters of @a __s within
5583 : * this string. If found, returns the index where it was
5584 : * found. If not found, returns npos.
5585 : */
5586 : size_type
5587 : find_first_not_of(const _CharT* __s, size_type __pos,
5588 : size_type __n) const _GLIBCXX_NOEXCEPT;
5589 :
5590 : /**
5591 : * @brief Find position of a character not in C string.
5592 : * @param __s C string containing characters to avoid.
5593 : * @param __pos Index of character to search from (default 0).
5594 : * @return Index of first occurrence.
5595 : *
5596 : * Starting from @a __pos, searches forward for a character not
5597 : * contained in @a __s within this string. If found, returns
5598 : * the index where it was found. If not found, returns npos.
5599 : */
5600 : size_type
5601 : find_first_not_of(const _CharT* __s, size_type __pos = 0) const
5602 : _GLIBCXX_NOEXCEPT
5603 : {
5604 : __glibcxx_requires_string(__s);
5605 : return this->find_first_not_of(__s, __pos, traits_type::length(__s));
5606 : }
5607 :
5608 : /**
5609 : * @brief Find position of a different character.
5610 : * @param __c Character to avoid.
5611 : * @param __pos Index of character to search from (default 0).
5612 : * @return Index of first occurrence.
5613 : *
5614 : * Starting from @a __pos, searches forward for a character
5615 : * other than @a __c within this string. If found, returns the
5616 : * index where it was found. If not found, returns npos.
5617 : */
5618 : size_type
5619 : find_first_not_of(_CharT __c, size_type __pos = 0) const
5620 : _GLIBCXX_NOEXCEPT;
5621 :
5622 : #if __cplusplus >= 201703L
5623 : /**
5624 : * @brief Find position of a character not in a string_view.
5625 : * @param __svt An object convertible to string_view containing
5626 : * characters to avoid.
5627 : * @param __pos Index of character to search from (default 0).
5628 : * @return Index of first occurrence.
5629 : */
5630 : template<typename _Tp>
5631 : _If_sv<_Tp, size_type>
5632 : find_first_not_of(const _Tp& __svt, size_type __pos = 0) const
5633 : noexcept(is_same<_Tp, __sv_type>::value)
5634 : {
5635 : __sv_type __sv = __svt;
5636 : return this->find_first_not_of(__sv.data(), __pos, __sv.size());
5637 : }
5638 : #endif // C++17
5639 :
5640 : /**
5641 : * @brief Find last position of a character not in string.
5642 : * @param __str String containing characters to avoid.
5643 : * @param __pos Index of character to search back from (default end).
5644 : * @return Index of last occurrence.
5645 : *
5646 : * Starting from @a __pos, searches backward for a character
5647 : * not contained in @a __str within this string. If found,
5648 : * returns the index where it was found. If not found, returns
5649 : * npos.
5650 : */
5651 : size_type
5652 : find_last_not_of(const basic_string& __str, size_type __pos = npos) const
5653 : _GLIBCXX_NOEXCEPT
5654 : { return this->find_last_not_of(__str.data(), __pos, __str.size()); }
5655 :
5656 : /**
5657 : * @brief Find last position of a character not in C substring.
5658 : * @param __s C string containing characters to avoid.
5659 : * @param __pos Index of character to search back from.
5660 : * @param __n Number of characters from s to consider.
5661 : * @return Index of last occurrence.
5662 : *
5663 : * Starting from @a __pos, searches backward for a character not
5664 : * contained in the first @a __n characters of @a __s within this string.
5665 : * If found, returns the index where it was found. If not found,
5666 : * returns npos.
5667 : */
5668 : size_type
5669 : find_last_not_of(const _CharT* __s, size_type __pos,
5670 : size_type __n) const _GLIBCXX_NOEXCEPT;
5671 : /**
5672 : * @brief Find last position of a character not in C string.
5673 : * @param __s C string containing characters to avoid.
5674 : * @param __pos Index of character to search back from (default end).
5675 : * @return Index of last occurrence.
5676 : *
5677 : * Starting from @a __pos, searches backward for a character
5678 : * not contained in @a __s within this string. If found,
5679 : * returns the index where it was found. If not found, returns
5680 : * npos.
5681 : */
5682 : size_type
5683 : find_last_not_of(const _CharT* __s, size_type __pos = npos) const
5684 : _GLIBCXX_NOEXCEPT
5685 : {
5686 : __glibcxx_requires_string(__s);
5687 : return this->find_last_not_of(__s, __pos, traits_type::length(__s));
5688 : }
5689 :
5690 : /**
5691 : * @brief Find last position of a different character.
5692 : * @param __c Character to avoid.
5693 : * @param __pos Index of character to search back from (default end).
5694 : * @return Index of last occurrence.
5695 : *
5696 : * Starting from @a __pos, searches backward for a character other than
5697 : * @a __c within this string. If found, returns the index where it was
5698 : * found. If not found, returns npos.
5699 : */
5700 : size_type
5701 : find_last_not_of(_CharT __c, size_type __pos = npos) const
5702 : _GLIBCXX_NOEXCEPT;
5703 :
5704 : #if __cplusplus >= 201703L
5705 : /**
5706 : * @brief Find last position of a character not in a string_view.
5707 : * @param __svt An object convertible to string_view containing
5708 : * characters to avoid.
5709 : * @param __pos Index of character to search back from (default end).
5710 : * @return Index of last occurrence.
5711 : */
5712 : template<typename _Tp>
5713 : _If_sv<_Tp, size_type>
5714 : find_last_not_of(const _Tp& __svt, size_type __pos = npos) const
5715 : noexcept(is_same<_Tp, __sv_type>::value)
5716 : {
5717 : __sv_type __sv = __svt;
5718 : return this->find_last_not_of(__sv.data(), __pos, __sv.size());
5719 : }
5720 : #endif // C++17
5721 :
5722 : /**
5723 : * @brief Get a substring.
5724 : * @param __pos Index of first character (default 0).
5725 : * @param __n Number of characters in substring (default remainder).
5726 : * @return The new string.
5727 : * @throw std::out_of_range If __pos > size().
5728 : *
5729 : * Construct and return a new string using the @a __n
5730 : * characters starting at @a __pos. If the string is too
5731 : * short, use the remainder of the characters. If @a __pos is
5732 : * beyond the end of the string, out_of_range is thrown.
5733 : */
5734 : basic_string
5735 : substr(size_type __pos = 0, size_type __n = npos) const
5736 : { return basic_string(*this,
5737 : _M_check(__pos, "basic_string::substr"), __n); }
5738 :
5739 : /**
5740 : * @brief Compare to a string.
5741 : * @param __str String to compare against.
5742 : * @return Integer < 0, 0, or > 0.
5743 : *
5744 : * Returns an integer < 0 if this string is ordered before @a
5745 : * __str, 0 if their values are equivalent, or > 0 if this
5746 : * string is ordered after @a __str. Determines the effective
5747 : * length rlen of the strings to compare as the smallest of
5748 : * size() and str.size(). The function then compares the two
5749 : * strings by calling traits::compare(data(), str.data(),rlen).
5750 : * If the result of the comparison is nonzero returns it,
5751 : * otherwise the shorter one is ordered first.
5752 : */
5753 : int
5754 : compare(const basic_string& __str) const
5755 : {
5756 : const size_type __size = this->size();
5757 : const size_type __osize = __str.size();
5758 : const size_type __len = std::min(__size, __osize);
5759 :
5760 : int __r = traits_type::compare(_M_data(), __str.data(), __len);
5761 : if (!__r)
5762 : __r = _S_compare(__size, __osize);
5763 : return __r;
5764 : }
5765 :
5766 : #if __cplusplus >= 201703L
5767 : /**
5768 : * @brief Compare to a string_view.
5769 : * @param __svt An object convertible to string_view to compare against.
5770 : * @return Integer < 0, 0, or > 0.
5771 : */
5772 : template<typename _Tp>
5773 : _If_sv<_Tp, int>
5774 : compare(const _Tp& __svt) const
5775 : noexcept(is_same<_Tp, __sv_type>::value)
5776 : {
5777 : __sv_type __sv = __svt;
5778 : const size_type __size = this->size();
5779 : const size_type __osize = __sv.size();
5780 : const size_type __len = std::min(__size, __osize);
5781 :
5782 : int __r = traits_type::compare(_M_data(), __sv.data(), __len);
5783 : if (!__r)
5784 : __r = _S_compare(__size, __osize);
5785 : return __r;
5786 : }
5787 :
5788 : /**
5789 : * @brief Compare to a string_view.
5790 : * @param __pos A position in the string to start comparing from.
5791 : * @param __n The number of characters to compare.
5792 : * @param __svt An object convertible to string_view to compare
5793 : * against.
5794 : * @return Integer < 0, 0, or > 0.
5795 : */
5796 : template<typename _Tp>
5797 : _If_sv<_Tp, int>
5798 : compare(size_type __pos, size_type __n, const _Tp& __svt) const
5799 : noexcept(is_same<_Tp, __sv_type>::value)
5800 : {
5801 : __sv_type __sv = __svt;
5802 : return __sv_type(*this).substr(__pos, __n).compare(__sv);
5803 : }
5804 :
5805 : /**
5806 : * @brief Compare to a string_view.
5807 : * @param __pos1 A position in the string to start comparing from.
5808 : * @param __n1 The number of characters to compare.
5809 : * @param __svt An object convertible to string_view to compare
5810 : * against.
5811 : * @param __pos2 A position in the string_view to start comparing from.
5812 : * @param __n2 The number of characters to compare.
5813 : * @return Integer < 0, 0, or > 0.
5814 : */
5815 : template<typename _Tp>
5816 : _If_sv<_Tp, int>
5817 : compare(size_type __pos1, size_type __n1, const _Tp& __svt,
5818 : size_type __pos2, size_type __n2 = npos) const
5819 : noexcept(is_same<_Tp, __sv_type>::value)
5820 : {
5821 : __sv_type __sv = __svt;
5822 : return __sv_type(*this)
5823 : .substr(__pos1, __n1).compare(__sv.substr(__pos2, __n2));
5824 : }
5825 : #endif // C++17
5826 :
5827 : /**
5828 : * @brief Compare substring to a string.
5829 : * @param __pos Index of first character of substring.
5830 : * @param __n Number of characters in substring.
5831 : * @param __str String to compare against.
5832 : * @return Integer < 0, 0, or > 0.
5833 : *
5834 : * Form the substring of this string from the @a __n characters
5835 : * starting at @a __pos. Returns an integer < 0 if the
5836 : * substring is ordered before @a __str, 0 if their values are
5837 : * equivalent, or > 0 if the substring is ordered after @a
5838 : * __str. Determines the effective length rlen of the strings
5839 : * to compare as the smallest of the length of the substring
5840 : * and @a __str.size(). The function then compares the two
5841 : * strings by calling
5842 : * traits::compare(substring.data(),str.data(),rlen). If the
5843 : * result of the comparison is nonzero returns it, otherwise
5844 : * the shorter one is ordered first.
5845 : */
5846 : int
5847 : compare(size_type __pos, size_type __n, const basic_string& __str) const;
5848 :
5849 : /**
5850 : * @brief Compare substring to a substring.
5851 : * @param __pos1 Index of first character of substring.
5852 : * @param __n1 Number of characters in substring.
5853 : * @param __str String to compare against.
5854 : * @param __pos2 Index of first character of substring of str.
5855 : * @param __n2 Number of characters in substring of str.
5856 : * @return Integer < 0, 0, or > 0.
5857 : *
5858 : * Form the substring of this string from the @a __n1
5859 : * characters starting at @a __pos1. Form the substring of @a
5860 : * __str from the @a __n2 characters starting at @a __pos2.
5861 : * Returns an integer < 0 if this substring is ordered before
5862 : * the substring of @a __str, 0 if their values are equivalent,
5863 : * or > 0 if this substring is ordered after the substring of
5864 : * @a __str. Determines the effective length rlen of the
5865 : * strings to compare as the smallest of the lengths of the
5866 : * substrings. The function then compares the two strings by
5867 : * calling
5868 : * traits::compare(substring.data(),str.substr(pos2,n2).data(),rlen).
5869 : * If the result of the comparison is nonzero returns it,
5870 : * otherwise the shorter one is ordered first.
5871 : */
5872 : int
5873 : compare(size_type __pos1, size_type __n1, const basic_string& __str,
5874 : size_type __pos2, size_type __n2 = npos) const;
5875 :
5876 : /**
5877 : * @brief Compare to a C string.
5878 : * @param __s C string to compare against.
5879 : * @return Integer < 0, 0, or > 0.
5880 : *
5881 : * Returns an integer < 0 if this string is ordered before @a __s, 0 if
5882 : * their values are equivalent, or > 0 if this string is ordered after
5883 : * @a __s. Determines the effective length rlen of the strings to
5884 : * compare as the smallest of size() and the length of a string
5885 : * constructed from @a __s. The function then compares the two strings
5886 : * by calling traits::compare(data(),s,rlen). If the result of the
5887 : * comparison is nonzero returns it, otherwise the shorter one is
5888 : * ordered first.
5889 : */
5890 : int
5891 : compare(const _CharT* __s) const _GLIBCXX_NOEXCEPT;
5892 :
5893 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
5894 : // 5 String::compare specification questionable
5895 : /**
5896 : * @brief Compare substring to a C string.
5897 : * @param __pos Index of first character of substring.
5898 : * @param __n1 Number of characters in substring.
5899 : * @param __s C string to compare against.
5900 : * @return Integer < 0, 0, or > 0.
5901 : *
5902 : * Form the substring of this string from the @a __n1
5903 : * characters starting at @a pos. Returns an integer < 0 if
5904 : * the substring is ordered before @a __s, 0 if their values
5905 : * are equivalent, or > 0 if the substring is ordered after @a
5906 : * __s. Determines the effective length rlen of the strings to
5907 : * compare as the smallest of the length of the substring and
5908 : * the length of a string constructed from @a __s. The
5909 : * function then compares the two string by calling
5910 : * traits::compare(substring.data(),__s,rlen). If the result of
5911 : * the comparison is nonzero returns it, otherwise the shorter
5912 : * one is ordered first.
5913 : */
5914 : int
5915 : compare(size_type __pos, size_type __n1, const _CharT* __s) const;
5916 :
5917 : /**
5918 : * @brief Compare substring against a character %array.
5919 : * @param __pos Index of first character of substring.
5920 : * @param __n1 Number of characters in substring.
5921 : * @param __s character %array to compare against.
5922 : * @param __n2 Number of characters of s.
5923 : * @return Integer < 0, 0, or > 0.
5924 : *
5925 : * Form the substring of this string from the @a __n1
5926 : * characters starting at @a __pos. Form a string from the
5927 : * first @a __n2 characters of @a __s. Returns an integer < 0
5928 : * if this substring is ordered before the string from @a __s,
5929 : * 0 if their values are equivalent, or > 0 if this substring
5930 : * is ordered after the string from @a __s. Determines the
5931 : * effective length rlen of the strings to compare as the
5932 : * smallest of the length of the substring and @a __n2. The
5933 : * function then compares the two strings by calling
5934 : * traits::compare(substring.data(),s,rlen). If the result of
5935 : * the comparison is nonzero returns it, otherwise the shorter
5936 : * one is ordered first.
5937 : *
5938 : * NB: s must have at least n2 characters, '\\0' has
5939 : * no special meaning.
5940 : */
5941 : int
5942 : compare(size_type __pos, size_type __n1, const _CharT* __s,
5943 : size_type __n2) const;
5944 :
5945 : #if __cplusplus > 201703L
5946 : bool
5947 : starts_with(basic_string_view<_CharT, _Traits> __x) const noexcept
5948 : { return __sv_type(this->data(), this->size()).starts_with(__x); }
5949 :
5950 : bool
5951 : starts_with(_CharT __x) const noexcept
5952 : { return __sv_type(this->data(), this->size()).starts_with(__x); }
5953 :
5954 : bool
5955 : starts_with(const _CharT* __x) const noexcept
5956 : { return __sv_type(this->data(), this->size()).starts_with(__x); }
5957 :
5958 : bool
5959 : ends_with(basic_string_view<_CharT, _Traits> __x) const noexcept
5960 : { return __sv_type(this->data(), this->size()).ends_with(__x); }
5961 :
5962 : bool
5963 : ends_with(_CharT __x) const noexcept
5964 : { return __sv_type(this->data(), this->size()).ends_with(__x); }
5965 :
5966 : bool
5967 : ends_with(const _CharT* __x) const noexcept
5968 : { return __sv_type(this->data(), this->size()).ends_with(__x); }
5969 : #endif // C++20
5970 :
5971 : # ifdef _GLIBCXX_TM_TS_INTERNAL
5972 : friend void
5973 : ::_txnal_cow_string_C1_for_exceptions(void* that, const char* s,
5974 : void* exc);
5975 : friend const char*
5976 : ::_txnal_cow_string_c_str(const void *that);
5977 : friend void
5978 : ::_txnal_cow_string_D1(void *that);
5979 : friend void
5980 : ::_txnal_cow_string_D1_commit(void *that);
5981 : # endif
5982 : };
5983 : #endif // !_GLIBCXX_USE_CXX11_ABI
5984 :
5985 : #if __cpp_deduction_guides >= 201606
5986 : _GLIBCXX_BEGIN_NAMESPACE_CXX11
5987 : template<typename _InputIterator, typename _CharT
5988 : = typename iterator_traits<_InputIterator>::value_type,
5989 : typename _Allocator = allocator<_CharT>,
5990 : typename = _RequireInputIter<_InputIterator>,
5991 : typename = _RequireAllocator<_Allocator>>
5992 : basic_string(_InputIterator, _InputIterator, _Allocator = _Allocator())
5993 : -> basic_string<_CharT, char_traits<_CharT>, _Allocator>;
5994 :
5995 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
5996 : // 3075. basic_string needs deduction guides from basic_string_view
5997 : template<typename _CharT, typename _Traits,
5998 : typename _Allocator = allocator<_CharT>,
5999 : typename = _RequireAllocator<_Allocator>>
6000 : basic_string(basic_string_view<_CharT, _Traits>, const _Allocator& = _Allocator())
6001 : -> basic_string<_CharT, _Traits, _Allocator>;
6002 :
6003 : template<typename _CharT, typename _Traits,
6004 : typename _Allocator = allocator<_CharT>,
6005 : typename = _RequireAllocator<_Allocator>>
6006 : basic_string(basic_string_view<_CharT, _Traits>,
6007 : typename basic_string<_CharT, _Traits, _Allocator>::size_type,
6008 : typename basic_string<_CharT, _Traits, _Allocator>::size_type,
6009 : const _Allocator& = _Allocator())
6010 : -> basic_string<_CharT, _Traits, _Allocator>;
6011 : _GLIBCXX_END_NAMESPACE_CXX11
6012 : #endif
6013 :
6014 : // operator+
6015 : /**
6016 : * @brief Concatenate two strings.
6017 : * @param __lhs First string.
6018 : * @param __rhs Last string.
6019 : * @return New string with value of @a __lhs followed by @a __rhs.
6020 : */
6021 : template<typename _CharT, typename _Traits, typename _Alloc>
6022 : basic_string<_CharT, _Traits, _Alloc>
6023 27811311 : operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6024 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6025 : {
6026 27811311 : basic_string<_CharT, _Traits, _Alloc> __str(__lhs);
6027 27811311 : __str.append(__rhs);
6028 27811311 : return __str;
6029 : }
6030 :
6031 : /**
6032 : * @brief Concatenate C string and string.
6033 : * @param __lhs First string.
6034 : * @param __rhs Last string.
6035 : * @return New string with value of @a __lhs followed by @a __rhs.
6036 : */
6037 : template<typename _CharT, typename _Traits, typename _Alloc>
6038 : basic_string<_CharT,_Traits,_Alloc>
6039 : operator+(const _CharT* __lhs,
6040 : const basic_string<_CharT,_Traits,_Alloc>& __rhs);
6041 :
6042 : /**
6043 : * @brief Concatenate character and string.
6044 : * @param __lhs First string.
6045 : * @param __rhs Last string.
6046 : * @return New string with @a __lhs followed by @a __rhs.
6047 : */
6048 : template<typename _CharT, typename _Traits, typename _Alloc>
6049 : basic_string<_CharT,_Traits,_Alloc>
6050 : operator+(_CharT __lhs, const basic_string<_CharT,_Traits,_Alloc>& __rhs);
6051 :
6052 : /**
6053 : * @brief Concatenate string and C string.
6054 : * @param __lhs First string.
6055 : * @param __rhs Last string.
6056 : * @return New string with @a __lhs followed by @a __rhs.
6057 : */
6058 : template<typename _CharT, typename _Traits, typename _Alloc>
6059 : inline basic_string<_CharT, _Traits, _Alloc>
6060 2784022 : operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6061 : const _CharT* __rhs)
6062 : {
6063 2784022 : basic_string<_CharT, _Traits, _Alloc> __str(__lhs);
6064 2784022 : __str.append(__rhs);
6065 2784022 : return __str;
6066 : }
6067 :
6068 : /**
6069 : * @brief Concatenate string and character.
6070 : * @param __lhs First string.
6071 : * @param __rhs Last string.
6072 : * @return New string with @a __lhs followed by @a __rhs.
6073 : */
6074 : template<typename _CharT, typename _Traits, typename _Alloc>
6075 : inline basic_string<_CharT, _Traits, _Alloc>
6076 2854 : operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs, _CharT __rhs)
6077 : {
6078 : typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
6079 : typedef typename __string_type::size_type __size_type;
6080 2854 : __string_type __str(__lhs);
6081 2854 : __str.append(__size_type(1), __rhs);
6082 2854 : return __str;
6083 : }
6084 :
6085 : #if __cplusplus >= 201103L
6086 : template<typename _CharT, typename _Traits, typename _Alloc>
6087 : inline basic_string<_CharT, _Traits, _Alloc>
6088 381441 : operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
6089 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6090 381441 : { return std::move(__lhs.append(__rhs)); }
6091 :
6092 : template<typename _CharT, typename _Traits, typename _Alloc>
6093 : inline basic_string<_CharT, _Traits, _Alloc>
6094 113659 : operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6095 : basic_string<_CharT, _Traits, _Alloc>&& __rhs)
6096 113659 : { return std::move(__rhs.insert(0, __lhs)); }
6097 :
6098 : template<typename _CharT, typename _Traits, typename _Alloc>
6099 : inline basic_string<_CharT, _Traits, _Alloc>
6100 937291 : operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
6101 : basic_string<_CharT, _Traits, _Alloc>&& __rhs)
6102 : {
6103 937291 : const auto __size = __lhs.size() + __rhs.size();
6104 1874582 : const bool __cond = (__size > __lhs.capacity()
6105 1460522 : && __size <= __rhs.capacity());
6106 35753 : return __cond ? std::move(__rhs.insert(0, __lhs))
6107 901538 : : std::move(__lhs.append(__rhs));
6108 : }
6109 :
6110 : template<typename _CharT, typename _Traits, typename _Alloc>
6111 : inline basic_string<_CharT, _Traits, _Alloc>
6112 309499 : operator+(const _CharT* __lhs,
6113 : basic_string<_CharT, _Traits, _Alloc>&& __rhs)
6114 309499 : { return std::move(__rhs.insert(0, __lhs)); }
6115 :
6116 : template<typename _CharT, typename _Traits, typename _Alloc>
6117 : inline basic_string<_CharT, _Traits, _Alloc>
6118 0 : operator+(_CharT __lhs,
6119 : basic_string<_CharT, _Traits, _Alloc>&& __rhs)
6120 0 : { return std::move(__rhs.insert(0, 1, __lhs)); }
6121 :
6122 : template<typename _CharT, typename _Traits, typename _Alloc>
6123 : inline basic_string<_CharT, _Traits, _Alloc>
6124 816593 : operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
6125 : const _CharT* __rhs)
6126 816593 : { return std::move(__lhs.append(__rhs)); }
6127 :
6128 : template<typename _CharT, typename _Traits, typename _Alloc>
6129 : inline basic_string<_CharT, _Traits, _Alloc>
6130 0 : operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
6131 : _CharT __rhs)
6132 0 : { return std::move(__lhs.append(1, __rhs)); }
6133 : #endif
6134 :
6135 : // operator ==
6136 : /**
6137 : * @brief Test equivalence of two strings.
6138 : * @param __lhs First string.
6139 : * @param __rhs Second string.
6140 : * @return True if @a __lhs.compare(@a __rhs) == 0. False otherwise.
6141 : */
6142 : template<typename _CharT, typename _Traits, typename _Alloc>
6143 : inline bool
6144 : operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6145 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6146 : _GLIBCXX_NOEXCEPT
6147 : { return __lhs.compare(__rhs) == 0; }
6148 :
6149 : template<typename _CharT>
6150 : inline
6151 : typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value, bool>::__type
6152 94219544 : operator==(const basic_string<_CharT>& __lhs,
6153 : const basic_string<_CharT>& __rhs) _GLIBCXX_NOEXCEPT
6154 94219544 : { return (__lhs.size() == __rhs.size()
6155 94219544 : && !std::char_traits<_CharT>::compare(__lhs.data(), __rhs.data(),
6156 94219544 : __lhs.size())); }
6157 :
6158 : /**
6159 : * @brief Test equivalence of C string and string.
6160 : * @param __lhs C string.
6161 : * @param __rhs String.
6162 : * @return True if @a __rhs.compare(@a __lhs) == 0. False otherwise.
6163 : */
6164 : template<typename _CharT, typename _Traits, typename _Alloc>
6165 : inline bool
6166 2878 : operator==(const _CharT* __lhs,
6167 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6168 2878 : { return __rhs.compare(__lhs) == 0; }
6169 :
6170 : /**
6171 : * @brief Test equivalence of string and C string.
6172 : * @param __lhs String.
6173 : * @param __rhs C string.
6174 : * @return True if @a __lhs.compare(@a __rhs) == 0. False otherwise.
6175 : */
6176 : template<typename _CharT, typename _Traits, typename _Alloc>
6177 : inline bool
6178 130512494 : operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6179 : const _CharT* __rhs)
6180 80178592 : { return __lhs.compare(__rhs) == 0; }
6181 :
6182 : // operator !=
6183 : /**
6184 : * @brief Test difference of two strings.
6185 : * @param __lhs First string.
6186 : * @param __rhs Second string.
6187 : * @return True if @a __lhs.compare(@a __rhs) != 0. False otherwise.
6188 : */
6189 : template<typename _CharT, typename _Traits, typename _Alloc>
6190 : inline bool
6191 2302524 : operator!=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6192 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6193 : _GLIBCXX_NOEXCEPT
6194 1452828 : { return !(__lhs == __rhs); }
6195 :
6196 : /**
6197 : * @brief Test difference of C string and string.
6198 : * @param __lhs C string.
6199 : * @param __rhs String.
6200 : * @return True if @a __rhs.compare(@a __lhs) != 0. False otherwise.
6201 : */
6202 : template<typename _CharT, typename _Traits, typename _Alloc>
6203 : inline bool
6204 : operator!=(const _CharT* __lhs,
6205 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6206 : { return !(__lhs == __rhs); }
6207 :
6208 : /**
6209 : * @brief Test difference of string and C string.
6210 : * @param __lhs String.
6211 : * @param __rhs C string.
6212 : * @return True if @a __lhs.compare(@a __rhs) != 0. False otherwise.
6213 : */
6214 : template<typename _CharT, typename _Traits, typename _Alloc>
6215 : inline bool
6216 51737440 : operator!=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6217 : const _CharT* __rhs)
6218 51737440 : { return !(__lhs == __rhs); }
6219 :
6220 : // operator <
6221 : /**
6222 : * @brief Test if string precedes string.
6223 : * @param __lhs First string.
6224 : * @param __rhs Second string.
6225 : * @return True if @a __lhs precedes @a __rhs. False otherwise.
6226 : */
6227 : template<typename _CharT, typename _Traits, typename _Alloc>
6228 : inline bool
6229 828894082 : operator<(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6230 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6231 : _GLIBCXX_NOEXCEPT
6232 828894082 : { return __lhs.compare(__rhs) < 0; }
6233 :
6234 : /**
6235 : * @brief Test if string precedes C string.
6236 : * @param __lhs String.
6237 : * @param __rhs C string.
6238 : * @return True if @a __lhs precedes @a __rhs. False otherwise.
6239 : */
6240 : template<typename _CharT, typename _Traits, typename _Alloc>
6241 : inline bool
6242 : operator<(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6243 : const _CharT* __rhs)
6244 : { return __lhs.compare(__rhs) < 0; }
6245 :
6246 : /**
6247 : * @brief Test if C string precedes string.
6248 : * @param __lhs C string.
6249 : * @param __rhs String.
6250 : * @return True if @a __lhs precedes @a __rhs. False otherwise.
6251 : */
6252 : template<typename _CharT, typename _Traits, typename _Alloc>
6253 : inline bool
6254 : operator<(const _CharT* __lhs,
6255 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6256 : { return __rhs.compare(__lhs) > 0; }
6257 :
6258 : // operator >
6259 : /**
6260 : * @brief Test if string follows string.
6261 : * @param __lhs First string.
6262 : * @param __rhs Second string.
6263 : * @return True if @a __lhs follows @a __rhs. False otherwise.
6264 : */
6265 : template<typename _CharT, typename _Traits, typename _Alloc>
6266 : inline bool
6267 0 : operator>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6268 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6269 : _GLIBCXX_NOEXCEPT
6270 0 : { return __lhs.compare(__rhs) > 0; }
6271 :
6272 : /**
6273 : * @brief Test if string follows C string.
6274 : * @param __lhs String.
6275 : * @param __rhs C string.
6276 : * @return True if @a __lhs follows @a __rhs. False otherwise.
6277 : */
6278 : template<typename _CharT, typename _Traits, typename _Alloc>
6279 : inline bool
6280 : operator>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6281 : const _CharT* __rhs)
6282 : { return __lhs.compare(__rhs) > 0; }
6283 :
6284 : /**
6285 : * @brief Test if C string follows string.
6286 : * @param __lhs C string.
6287 : * @param __rhs String.
6288 : * @return True if @a __lhs follows @a __rhs. False otherwise.
6289 : */
6290 : template<typename _CharT, typename _Traits, typename _Alloc>
6291 : inline bool
6292 : operator>(const _CharT* __lhs,
6293 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6294 : { return __rhs.compare(__lhs) < 0; }
6295 :
6296 : // operator <=
6297 : /**
6298 : * @brief Test if string doesn't follow string.
6299 : * @param __lhs First string.
6300 : * @param __rhs Second string.
6301 : * @return True if @a __lhs doesn't follow @a __rhs. False otherwise.
6302 : */
6303 : template<typename _CharT, typename _Traits, typename _Alloc>
6304 : inline bool
6305 0 : operator<=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6306 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6307 : _GLIBCXX_NOEXCEPT
6308 0 : { return __lhs.compare(__rhs) <= 0; }
6309 :
6310 : /**
6311 : * @brief Test if string doesn't follow C string.
6312 : * @param __lhs String.
6313 : * @param __rhs C string.
6314 : * @return True if @a __lhs doesn't follow @a __rhs. False otherwise.
6315 : */
6316 : template<typename _CharT, typename _Traits, typename _Alloc>
6317 : inline bool
6318 : operator<=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6319 : const _CharT* __rhs)
6320 : { return __lhs.compare(__rhs) <= 0; }
6321 :
6322 : /**
6323 : * @brief Test if C string doesn't follow string.
6324 : * @param __lhs C string.
6325 : * @param __rhs String.
6326 : * @return True if @a __lhs doesn't follow @a __rhs. False otherwise.
6327 : */
6328 : template<typename _CharT, typename _Traits, typename _Alloc>
6329 : inline bool
6330 : operator<=(const _CharT* __lhs,
6331 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6332 : { return __rhs.compare(__lhs) >= 0; }
6333 :
6334 : // operator >=
6335 : /**
6336 : * @brief Test if string doesn't precede string.
6337 : * @param __lhs First string.
6338 : * @param __rhs Second string.
6339 : * @return True if @a __lhs doesn't precede @a __rhs. False otherwise.
6340 : */
6341 : template<typename _CharT, typename _Traits, typename _Alloc>
6342 : inline bool
6343 0 : operator>=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6344 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6345 : _GLIBCXX_NOEXCEPT
6346 0 : { return __lhs.compare(__rhs) >= 0; }
6347 :
6348 : /**
6349 : * @brief Test if string doesn't precede C string.
6350 : * @param __lhs String.
6351 : * @param __rhs C string.
6352 : * @return True if @a __lhs doesn't precede @a __rhs. False otherwise.
6353 : */
6354 : template<typename _CharT, typename _Traits, typename _Alloc>
6355 : inline bool
6356 : operator>=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
6357 : const _CharT* __rhs)
6358 : { return __lhs.compare(__rhs) >= 0; }
6359 :
6360 : /**
6361 : * @brief Test if C string doesn't precede string.
6362 : * @param __lhs C string.
6363 : * @param __rhs String.
6364 : * @return True if @a __lhs doesn't precede @a __rhs. False otherwise.
6365 : */
6366 : template<typename _CharT, typename _Traits, typename _Alloc>
6367 : inline bool
6368 : operator>=(const _CharT* __lhs,
6369 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
6370 : { return __rhs.compare(__lhs) <= 0; }
6371 :
6372 : /**
6373 : * @brief Swap contents of two strings.
6374 : * @param __lhs First string.
6375 : * @param __rhs Second string.
6376 : *
6377 : * Exchanges the contents of @a __lhs and @a __rhs in constant time.
6378 : */
6379 : template<typename _CharT, typename _Traits, typename _Alloc>
6380 : inline void
6381 0 : swap(basic_string<_CharT, _Traits, _Alloc>& __lhs,
6382 : basic_string<_CharT, _Traits, _Alloc>& __rhs)
6383 : _GLIBCXX_NOEXCEPT_IF(noexcept(__lhs.swap(__rhs)))
6384 0 : { __lhs.swap(__rhs); }
6385 :
6386 :
6387 : /**
6388 : * @brief Read stream into a string.
6389 : * @param __is Input stream.
6390 : * @param __str Buffer to store into.
6391 : * @return Reference to the input stream.
6392 : *
6393 : * Stores characters from @a __is into @a __str until whitespace is
6394 : * found, the end of the stream is encountered, or str.max_size()
6395 : * is reached. If is.width() is non-zero, that is the limit on the
6396 : * number of characters stored into @a __str. Any previous
6397 : * contents of @a __str are erased.
6398 : */
6399 : template<typename _CharT, typename _Traits, typename _Alloc>
6400 : basic_istream<_CharT, _Traits>&
6401 : operator>>(basic_istream<_CharT, _Traits>& __is,
6402 : basic_string<_CharT, _Traits, _Alloc>& __str);
6403 :
6404 : template<>
6405 : basic_istream<char>&
6406 : operator>>(basic_istream<char>& __is, basic_string<char>& __str);
6407 :
6408 : /**
6409 : * @brief Write string to a stream.
6410 : * @param __os Output stream.
6411 : * @param __str String to write out.
6412 : * @return Reference to the output stream.
6413 : *
6414 : * Output characters of @a __str into os following the same rules as for
6415 : * writing a C string.
6416 : */
6417 : template<typename _CharT, typename _Traits, typename _Alloc>
6418 : inline basic_ostream<_CharT, _Traits>&
6419 85765756 : operator<<(basic_ostream<_CharT, _Traits>& __os,
6420 : const basic_string<_CharT, _Traits, _Alloc>& __str)
6421 : {
6422 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
6423 : // 586. string inserter not a formatted function
6424 85765756 : return __ostream_insert(__os, __str.data(), __str.size());
6425 : }
6426 :
6427 : /**
6428 : * @brief Read a line from stream into a string.
6429 : * @param __is Input stream.
6430 : * @param __str Buffer to store into.
6431 : * @param __delim Character marking end of line.
6432 : * @return Reference to the input stream.
6433 : *
6434 : * Stores characters from @a __is into @a __str until @a __delim is
6435 : * found, the end of the stream is encountered, or str.max_size()
6436 : * is reached. Any previous contents of @a __str are erased. If
6437 : * @a __delim is encountered, it is extracted but not stored into
6438 : * @a __str.
6439 : */
6440 : template<typename _CharT, typename _Traits, typename _Alloc>
6441 : basic_istream<_CharT, _Traits>&
6442 : getline(basic_istream<_CharT, _Traits>& __is,
6443 : basic_string<_CharT, _Traits, _Alloc>& __str, _CharT __delim);
6444 :
6445 : /**
6446 : * @brief Read a line from stream into a string.
6447 : * @param __is Input stream.
6448 : * @param __str Buffer to store into.
6449 : * @return Reference to the input stream.
6450 : *
6451 : * Stores characters from is into @a __str until '\n' is
6452 : * found, the end of the stream is encountered, or str.max_size()
6453 : * is reached. Any previous contents of @a __str are erased. If
6454 : * end of line is encountered, it is extracted but not stored into
6455 : * @a __str.
6456 : */
6457 : template<typename _CharT, typename _Traits, typename _Alloc>
6458 : inline basic_istream<_CharT, _Traits>&
6459 : getline(basic_istream<_CharT, _Traits>& __is,
6460 : basic_string<_CharT, _Traits, _Alloc>& __str)
6461 : { return std::getline(__is, __str, __is.widen('\n')); }
6462 :
6463 : #if __cplusplus >= 201103L
6464 : /// Read a line from an rvalue stream into a string.
6465 : template<typename _CharT, typename _Traits, typename _Alloc>
6466 : inline basic_istream<_CharT, _Traits>&
6467 : getline(basic_istream<_CharT, _Traits>&& __is,
6468 : basic_string<_CharT, _Traits, _Alloc>& __str, _CharT __delim)
6469 : { return std::getline(__is, __str, __delim); }
6470 :
6471 : /// Read a line from an rvalue stream into a string.
6472 : template<typename _CharT, typename _Traits, typename _Alloc>
6473 : inline basic_istream<_CharT, _Traits>&
6474 : getline(basic_istream<_CharT, _Traits>&& __is,
6475 : basic_string<_CharT, _Traits, _Alloc>& __str)
6476 : { return std::getline(__is, __str); }
6477 : #endif
6478 :
6479 : template<>
6480 : basic_istream<char>&
6481 : getline(basic_istream<char>& __in, basic_string<char>& __str,
6482 : char __delim);
6483 :
6484 : #ifdef _GLIBCXX_USE_WCHAR_T
6485 : template<>
6486 : basic_istream<wchar_t>&
6487 : getline(basic_istream<wchar_t>& __in, basic_string<wchar_t>& __str,
6488 : wchar_t __delim);
6489 : #endif
6490 :
6491 : _GLIBCXX_END_NAMESPACE_VERSION
6492 : } // namespace
6493 :
6494 : #if __cplusplus >= 201103L
6495 :
6496 : #include <ext/string_conversions.h>
6497 :
6498 : namespace std _GLIBCXX_VISIBILITY(default)
6499 : {
6500 : _GLIBCXX_BEGIN_NAMESPACE_VERSION
6501 : _GLIBCXX_BEGIN_NAMESPACE_CXX11
6502 :
6503 : #if _GLIBCXX_USE_C99_STDLIB
6504 : // 21.4 Numeric Conversions [string.conversions].
6505 : inline int
6506 : stoi(const string& __str, size_t* __idx = 0, int __base = 10)
6507 : { return __gnu_cxx::__stoa<long, int>(&std::strtol, "stoi", __str.c_str(),
6508 : __idx, __base); }
6509 :
6510 : inline long
6511 : stol(const string& __str, size_t* __idx = 0, int __base = 10)
6512 : { return __gnu_cxx::__stoa(&std::strtol, "stol", __str.c_str(),
6513 : __idx, __base); }
6514 :
6515 : inline unsigned long
6516 : stoul(const string& __str, size_t* __idx = 0, int __base = 10)
6517 : { return __gnu_cxx::__stoa(&std::strtoul, "stoul", __str.c_str(),
6518 : __idx, __base); }
6519 :
6520 : inline long long
6521 : stoll(const string& __str, size_t* __idx = 0, int __base = 10)
6522 : { return __gnu_cxx::__stoa(&std::strtoll, "stoll", __str.c_str(),
6523 : __idx, __base); }
6524 :
6525 : inline unsigned long long
6526 : stoull(const string& __str, size_t* __idx = 0, int __base = 10)
6527 : { return __gnu_cxx::__stoa(&std::strtoull, "stoull", __str.c_str(),
6528 : __idx, __base); }
6529 :
6530 : // NB: strtof vs strtod.
6531 : inline float
6532 : stof(const string& __str, size_t* __idx = 0)
6533 : { return __gnu_cxx::__stoa(&std::strtof, "stof", __str.c_str(), __idx); }
6534 :
6535 : inline double
6536 : stod(const string& __str, size_t* __idx = 0)
6537 : { return __gnu_cxx::__stoa(&std::strtod, "stod", __str.c_str(), __idx); }
6538 :
6539 : inline long double
6540 : stold(const string& __str, size_t* __idx = 0)
6541 : { return __gnu_cxx::__stoa(&std::strtold, "stold", __str.c_str(), __idx); }
6542 : #endif // _GLIBCXX_USE_C99_STDLIB
6543 :
6544 : #if _GLIBCXX_USE_C99_STDIO
6545 : // NB: (v)snprintf vs sprintf.
6546 :
6547 : // DR 1261.
6548 : inline string
6549 0 : to_string(int __val)
6550 0 : { return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, 4 * sizeof(int),
6551 0 : "%d", __val); }
6552 :
6553 : inline string
6554 : to_string(unsigned __val)
6555 : { return __gnu_cxx::__to_xstring<string>(&std::vsnprintf,
6556 : 4 * sizeof(unsigned),
6557 : "%u", __val); }
6558 :
6559 : inline string
6560 : to_string(long __val)
6561 : { return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, 4 * sizeof(long),
6562 : "%ld", __val); }
6563 :
6564 : inline string
6565 0 : to_string(unsigned long __val)
6566 0 : { return __gnu_cxx::__to_xstring<string>(&std::vsnprintf,
6567 : 4 * sizeof(unsigned long),
6568 0 : "%lu", __val); }
6569 :
6570 : inline string
6571 : to_string(long long __val)
6572 : { return __gnu_cxx::__to_xstring<string>(&std::vsnprintf,
6573 : 4 * sizeof(long long),
6574 : "%lld", __val); }
6575 :
6576 : inline string
6577 : to_string(unsigned long long __val)
6578 : { return __gnu_cxx::__to_xstring<string>(&std::vsnprintf,
6579 : 4 * sizeof(unsigned long long),
6580 : "%llu", __val); }
6581 :
6582 : inline string
6583 : to_string(float __val)
6584 : {
6585 : const int __n =
6586 : __gnu_cxx::__numeric_traits<float>::__max_exponent10 + 20;
6587 : return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, __n,
6588 : "%f", __val);
6589 : }
6590 :
6591 : inline string
6592 : to_string(double __val)
6593 : {
6594 : const int __n =
6595 : __gnu_cxx::__numeric_traits<double>::__max_exponent10 + 20;
6596 : return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, __n,
6597 : "%f", __val);
6598 : }
6599 :
6600 : inline string
6601 : to_string(long double __val)
6602 : {
6603 : const int __n =
6604 : __gnu_cxx::__numeric_traits<long double>::__max_exponent10 + 20;
6605 : return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, __n,
6606 : "%Lf", __val);
6607 : }
6608 : #endif // _GLIBCXX_USE_C99_STDIO
6609 :
6610 : #if defined(_GLIBCXX_USE_WCHAR_T) && _GLIBCXX_USE_C99_WCHAR
6611 : inline int
6612 : stoi(const wstring& __str, size_t* __idx = 0, int __base = 10)
6613 : { return __gnu_cxx::__stoa<long, int>(&std::wcstol, "stoi", __str.c_str(),
6614 : __idx, __base); }
6615 :
6616 : inline long
6617 : stol(const wstring& __str, size_t* __idx = 0, int __base = 10)
6618 : { return __gnu_cxx::__stoa(&std::wcstol, "stol", __str.c_str(),
6619 : __idx, __base); }
6620 :
6621 : inline unsigned long
6622 : stoul(const wstring& __str, size_t* __idx = 0, int __base = 10)
6623 : { return __gnu_cxx::__stoa(&std::wcstoul, "stoul", __str.c_str(),
6624 : __idx, __base); }
6625 :
6626 : inline long long
6627 : stoll(const wstring& __str, size_t* __idx = 0, int __base = 10)
6628 : { return __gnu_cxx::__stoa(&std::wcstoll, "stoll", __str.c_str(),
6629 : __idx, __base); }
6630 :
6631 : inline unsigned long long
6632 : stoull(const wstring& __str, size_t* __idx = 0, int __base = 10)
6633 : { return __gnu_cxx::__stoa(&std::wcstoull, "stoull", __str.c_str(),
6634 : __idx, __base); }
6635 :
6636 : // NB: wcstof vs wcstod.
6637 : inline float
6638 : stof(const wstring& __str, size_t* __idx = 0)
6639 : { return __gnu_cxx::__stoa(&std::wcstof, "stof", __str.c_str(), __idx); }
6640 :
6641 : inline double
6642 : stod(const wstring& __str, size_t* __idx = 0)
6643 : { return __gnu_cxx::__stoa(&std::wcstod, "stod", __str.c_str(), __idx); }
6644 :
6645 : inline long double
6646 : stold(const wstring& __str, size_t* __idx = 0)
6647 : { return __gnu_cxx::__stoa(&std::wcstold, "stold", __str.c_str(), __idx); }
6648 :
6649 : #ifndef _GLIBCXX_HAVE_BROKEN_VSWPRINTF
6650 : // DR 1261.
6651 : inline wstring
6652 : to_wstring(int __val)
6653 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf, 4 * sizeof(int),
6654 : L"%d", __val); }
6655 :
6656 : inline wstring
6657 : to_wstring(unsigned __val)
6658 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf,
6659 : 4 * sizeof(unsigned),
6660 : L"%u", __val); }
6661 :
6662 : inline wstring
6663 : to_wstring(long __val)
6664 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf, 4 * sizeof(long),
6665 : L"%ld", __val); }
6666 :
6667 : inline wstring
6668 : to_wstring(unsigned long __val)
6669 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf,
6670 : 4 * sizeof(unsigned long),
6671 : L"%lu", __val); }
6672 :
6673 : inline wstring
6674 : to_wstring(long long __val)
6675 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf,
6676 : 4 * sizeof(long long),
6677 : L"%lld", __val); }
6678 :
6679 : inline wstring
6680 : to_wstring(unsigned long long __val)
6681 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf,
6682 : 4 * sizeof(unsigned long long),
6683 : L"%llu", __val); }
6684 :
6685 : inline wstring
6686 : to_wstring(float __val)
6687 : {
6688 : const int __n =
6689 : __gnu_cxx::__numeric_traits<float>::__max_exponent10 + 20;
6690 : return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf, __n,
6691 : L"%f", __val);
6692 : }
6693 :
6694 : inline wstring
6695 : to_wstring(double __val)
6696 : {
6697 : const int __n =
6698 : __gnu_cxx::__numeric_traits<double>::__max_exponent10 + 20;
6699 : return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf, __n,
6700 : L"%f", __val);
6701 : }
6702 :
6703 : inline wstring
6704 : to_wstring(long double __val)
6705 : {
6706 : const int __n =
6707 : __gnu_cxx::__numeric_traits<long double>::__max_exponent10 + 20;
6708 : return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf, __n,
6709 : L"%Lf", __val);
6710 : }
6711 : #endif // _GLIBCXX_HAVE_BROKEN_VSWPRINTF
6712 : #endif // _GLIBCXX_USE_WCHAR_T && _GLIBCXX_USE_C99_WCHAR
6713 :
6714 : _GLIBCXX_END_NAMESPACE_CXX11
6715 : _GLIBCXX_END_NAMESPACE_VERSION
6716 : } // namespace
6717 :
6718 : #endif /* C++11 */
6719 :
6720 : #if __cplusplus >= 201103L
6721 :
6722 : #include <bits/functional_hash.h>
6723 :
6724 : namespace std _GLIBCXX_VISIBILITY(default)
6725 : {
6726 : _GLIBCXX_BEGIN_NAMESPACE_VERSION
6727 :
6728 : // DR 1182.
6729 :
6730 : #ifndef _GLIBCXX_COMPATIBILITY_CXX0X
6731 : /// std::hash specialization for string.
6732 : template<>
6733 : struct hash<string>
6734 : : public __hash_base<size_t, string>
6735 : {
6736 : size_t
6737 : operator()(const string& __s) const noexcept
6738 : { return std::_Hash_impl::hash(__s.data(), __s.length()); }
6739 : };
6740 :
6741 : template<>
6742 : struct __is_fast_hash<hash<string>> : std::false_type
6743 : { };
6744 :
6745 : #ifdef _GLIBCXX_USE_WCHAR_T
6746 : /// std::hash specialization for wstring.
6747 : template<>
6748 : struct hash<wstring>
6749 : : public __hash_base<size_t, wstring>
6750 : {
6751 : size_t
6752 : operator()(const wstring& __s) const noexcept
6753 : { return std::_Hash_impl::hash(__s.data(),
6754 : __s.length() * sizeof(wchar_t)); }
6755 : };
6756 :
6757 : template<>
6758 : struct __is_fast_hash<hash<wstring>> : std::false_type
6759 : { };
6760 : #endif
6761 : #endif /* _GLIBCXX_COMPATIBILITY_CXX0X */
6762 :
6763 : #ifdef _GLIBCXX_USE_CHAR8_T
6764 : /// std::hash specialization for u8string.
6765 : template<>
6766 : struct hash<u8string>
6767 : : public __hash_base<size_t, u8string>
6768 : {
6769 : size_t
6770 : operator()(const u8string& __s) const noexcept
6771 : { return std::_Hash_impl::hash(__s.data(),
6772 : __s.length() * sizeof(char8_t)); }
6773 : };
6774 :
6775 : template<>
6776 : struct __is_fast_hash<hash<u8string>> : std::false_type
6777 : { };
6778 : #endif
6779 :
6780 : /// std::hash specialization for u16string.
6781 : template<>
6782 : struct hash<u16string>
6783 : : public __hash_base<size_t, u16string>
6784 : {
6785 : size_t
6786 : operator()(const u16string& __s) const noexcept
6787 : { return std::_Hash_impl::hash(__s.data(),
6788 : __s.length() * sizeof(char16_t)); }
6789 : };
6790 :
6791 : template<>
6792 : struct __is_fast_hash<hash<u16string>> : std::false_type
6793 : { };
6794 :
6795 : /// std::hash specialization for u32string.
6796 : template<>
6797 : struct hash<u32string>
6798 : : public __hash_base<size_t, u32string>
6799 : {
6800 : size_t
6801 : operator()(const u32string& __s) const noexcept
6802 : { return std::_Hash_impl::hash(__s.data(),
6803 : __s.length() * sizeof(char32_t)); }
6804 : };
6805 :
6806 : template<>
6807 : struct __is_fast_hash<hash<u32string>> : std::false_type
6808 : { };
6809 :
6810 : #if __cplusplus >= 201402L
6811 :
6812 : #define __cpp_lib_string_udls 201304
6813 :
6814 : inline namespace literals
6815 : {
6816 : inline namespace string_literals
6817 : {
6818 : #pragma GCC diagnostic push
6819 : #pragma GCC diagnostic ignored "-Wliteral-suffix"
6820 : _GLIBCXX_DEFAULT_ABI_TAG
6821 : inline basic_string<char>
6822 : operator""s(const char* __str, size_t __len)
6823 : { return basic_string<char>{__str, __len}; }
6824 :
6825 : #ifdef _GLIBCXX_USE_WCHAR_T
6826 : _GLIBCXX_DEFAULT_ABI_TAG
6827 : inline basic_string<wchar_t>
6828 : operator""s(const wchar_t* __str, size_t __len)
6829 : { return basic_string<wchar_t>{__str, __len}; }
6830 : #endif
6831 :
6832 : #ifdef _GLIBCXX_USE_CHAR8_T
6833 : _GLIBCXX_DEFAULT_ABI_TAG
6834 : inline basic_string<char8_t>
6835 : operator""s(const char8_t* __str, size_t __len)
6836 : { return basic_string<char8_t>{__str, __len}; }
6837 : #endif
6838 :
6839 : _GLIBCXX_DEFAULT_ABI_TAG
6840 : inline basic_string<char16_t>
6841 : operator""s(const char16_t* __str, size_t __len)
6842 : { return basic_string<char16_t>{__str, __len}; }
6843 :
6844 : _GLIBCXX_DEFAULT_ABI_TAG
6845 : inline basic_string<char32_t>
6846 : operator""s(const char32_t* __str, size_t __len)
6847 : { return basic_string<char32_t>{__str, __len}; }
6848 :
6849 : #pragma GCC diagnostic pop
6850 : } // inline namespace string_literals
6851 : } // inline namespace literals
6852 :
6853 : #if __cplusplus >= 201703L
6854 : namespace __detail::__variant
6855 : {
6856 : template<typename> struct _Never_valueless_alt; // see <variant>
6857 :
6858 : // Provide the strong exception-safety guarantee when emplacing a
6859 : // basic_string into a variant, but only if moving the string cannot throw.
6860 : template<typename _Tp, typename _Traits, typename _Alloc>
6861 : struct _Never_valueless_alt<std::basic_string<_Tp, _Traits, _Alloc>>
6862 : : __and_<
6863 : is_nothrow_move_constructible<std::basic_string<_Tp, _Traits, _Alloc>>,
6864 : is_nothrow_move_assignable<std::basic_string<_Tp, _Traits, _Alloc>>
6865 : >::type
6866 : { };
6867 : } // namespace __detail::__variant
6868 : #endif // C++17
6869 : #endif // C++14
6870 :
6871 : _GLIBCXX_END_NAMESPACE_VERSION
6872 : } // namespace std
6873 :
6874 : #endif // C++11
6875 :
6876 : #endif /* _BASIC_STRING_H */
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