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1 : // Components for manipulating sequences of characters -*- C++ -*-
2 :
3 : // Copyright (C) 1997-2013 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 <debug/debug.h>
41 : #if __cplusplus >= 201103L
42 : #include <initializer_list>
43 : #endif
44 :
45 : namespace std _GLIBCXX_VISIBILITY(default)
46 : {
47 : _GLIBCXX_BEGIN_NAMESPACE_VERSION
48 :
49 : /**
50 : * @class basic_string basic_string.h <string>
51 : * @brief Managing sequences of characters and character-like objects.
52 : *
53 : * @ingroup strings
54 : * @ingroup sequences
55 : *
56 : * @tparam _CharT Type of character
57 : * @tparam _Traits Traits for character type, defaults to
58 : * char_traits<_CharT>.
59 : * @tparam _Alloc Allocator type, defaults to allocator<_CharT>.
60 : *
61 : * Meets the requirements of a <a href="tables.html#65">container</a>, a
62 : * <a href="tables.html#66">reversible container</a>, and a
63 : * <a href="tables.html#67">sequence</a>. Of the
64 : * <a href="tables.html#68">optional sequence requirements</a>, only
65 : * @c push_back, @c at, and @c %array access are supported.
66 : *
67 : * @doctodo
68 : *
69 : *
70 : * Documentation? What's that?
71 : * Nathan Myers <ncm@cantrip.org>.
72 : *
73 : * A string looks like this:
74 : *
75 : * @code
76 : * [_Rep]
77 : * _M_length
78 : * [basic_string<char_type>] _M_capacity
79 : * _M_dataplus _M_refcount
80 : * _M_p ----------------> unnamed array of char_type
81 : * @endcode
82 : *
83 : * Where the _M_p points to the first character in the string, and
84 : * you cast it to a pointer-to-_Rep and subtract 1 to get a
85 : * pointer to the header.
86 : *
87 : * This approach has the enormous advantage that a string object
88 : * requires only one allocation. All the ugliness is confined
89 : * within a single %pair of inline functions, which each compile to
90 : * a single @a add instruction: _Rep::_M_data(), and
91 : * string::_M_rep(); and the allocation function which gets a
92 : * block of raw bytes and with room enough and constructs a _Rep
93 : * object at the front.
94 : *
95 : * The reason you want _M_data pointing to the character %array and
96 : * not the _Rep is so that the debugger can see the string
97 : * contents. (Probably we should add a non-inline member to get
98 : * the _Rep for the debugger to use, so users can check the actual
99 : * string length.)
100 : *
101 : * Note that the _Rep object is a POD so that you can have a
102 : * static <em>empty string</em> _Rep object already @a constructed before
103 : * static constructors have run. The reference-count encoding is
104 : * chosen so that a 0 indicates one reference, so you never try to
105 : * destroy the empty-string _Rep object.
106 : *
107 : * All but the last paragraph is considered pretty conventional
108 : * for a C++ string implementation.
109 : */
110 : // 21.3 Template class basic_string
111 : template<typename _CharT, typename _Traits, typename _Alloc>
112 : class basic_string
113 : {
114 : typedef typename _Alloc::template rebind<_CharT>::other _CharT_alloc_type;
115 :
116 : // Types:
117 : public:
118 : typedef _Traits traits_type;
119 : typedef typename _Traits::char_type value_type;
120 : typedef _Alloc allocator_type;
121 : typedef typename _CharT_alloc_type::size_type size_type;
122 : typedef typename _CharT_alloc_type::difference_type difference_type;
123 : typedef typename _CharT_alloc_type::reference reference;
124 : typedef typename _CharT_alloc_type::const_reference const_reference;
125 : typedef typename _CharT_alloc_type::pointer pointer;
126 : typedef typename _CharT_alloc_type::const_pointer const_pointer;
127 : typedef __gnu_cxx::__normal_iterator<pointer, basic_string> iterator;
128 : typedef __gnu_cxx::__normal_iterator<const_pointer, basic_string>
129 : const_iterator;
130 : typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
131 : typedef std::reverse_iterator<iterator> reverse_iterator;
132 :
133 : private:
134 : // _Rep: string representation
135 : // Invariants:
136 : // 1. String really contains _M_length + 1 characters: due to 21.3.4
137 : // must be kept null-terminated.
138 : // 2. _M_capacity >= _M_length
139 : // Allocated memory is always (_M_capacity + 1) * sizeof(_CharT).
140 : // 3. _M_refcount has three states:
141 : // -1: leaked, one reference, no ref-copies allowed, non-const.
142 : // 0: one reference, non-const.
143 : // n>0: n + 1 references, operations require a lock, const.
144 : // 4. All fields==0 is an empty string, given the extra storage
145 : // beyond-the-end for a null terminator; thus, the shared
146 : // empty string representation needs no constructor.
147 :
148 : struct _Rep_base
149 : {
150 : size_type _M_length;
151 : size_type _M_capacity;
152 : _Atomic_word _M_refcount;
153 : };
154 :
155 : struct _Rep : _Rep_base
156 : {
157 : // Types:
158 : typedef typename _Alloc::template rebind<char>::other _Raw_bytes_alloc;
159 :
160 : // (Public) Data members:
161 :
162 : // The maximum number of individual char_type elements of an
163 : // individual string is determined by _S_max_size. This is the
164 : // value that will be returned by max_size(). (Whereas npos
165 : // is the maximum number of bytes the allocator can allocate.)
166 : // If one was to divvy up the theoretical largest size string,
167 : // with a terminating character and m _CharT elements, it'd
168 : // look like this:
169 : // npos = sizeof(_Rep) + (m * sizeof(_CharT)) + sizeof(_CharT)
170 : // Solving for m:
171 : // m = ((npos - sizeof(_Rep))/sizeof(CharT)) - 1
172 : // In addition, this implementation quarters this amount.
173 : static const size_type _S_max_size;
174 : static const _CharT _S_terminal;
175 :
176 : // The following storage is init'd to 0 by the linker, resulting
177 : // (carefully) in an empty string with one reference.
178 : static size_type _S_empty_rep_storage[];
179 :
180 : static _Rep&
181 : _S_empty_rep()
182 : {
183 : // NB: Mild hack to avoid strict-aliasing warnings. Note that
184 : // _S_empty_rep_storage is never modified and the punning should
185 : // be reasonably safe in this case.
186 : void* __p = reinterpret_cast<void*>(&_S_empty_rep_storage);
187 : return *reinterpret_cast<_Rep*>(__p);
188 : }
189 :
190 : bool
191 : _M_is_leaked() const
192 : { return this->_M_refcount < 0; }
193 :
194 : bool
195 : _M_is_shared() const
196 : { return this->_M_refcount > 0; }
197 :
198 : void
199 : _M_set_leaked()
200 : { this->_M_refcount = -1; }
201 :
202 : void
203 : _M_set_sharable()
204 : { this->_M_refcount = 0; }
205 :
206 : void
207 : _M_set_length_and_sharable(size_type __n)
208 : {
209 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
210 : if (__builtin_expect(this != &_S_empty_rep(), false))
211 : #endif
212 : {
213 : this->_M_set_sharable(); // One reference.
214 : this->_M_length = __n;
215 : traits_type::assign(this->_M_refdata()[__n], _S_terminal);
216 : // grrr. (per 21.3.4)
217 : // You cannot leave those LWG people alone for a second.
218 : }
219 : }
220 :
221 : _CharT*
222 : _M_refdata() throw()
223 : { return reinterpret_cast<_CharT*>(this + 1); }
224 :
225 : _CharT*
226 : _M_grab(const _Alloc& __alloc1, const _Alloc& __alloc2)
227 : {
228 : return (!_M_is_leaked() && __alloc1 == __alloc2)
229 : ? _M_refcopy() : _M_clone(__alloc1);
230 : }
231 :
232 : // Create & Destroy
233 : static _Rep*
234 : _S_create(size_type, size_type, const _Alloc&);
235 :
236 : void
237 : _M_dispose(const _Alloc& __a)
238 : {
239 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
240 : if (__builtin_expect(this != &_S_empty_rep(), false))
241 : #endif
242 : {
243 : // Be race-detector-friendly. For more info see bits/c++config.
244 : _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&this->_M_refcount);
245 : if (__gnu_cxx::__exchange_and_add_dispatch(&this->_M_refcount,
246 : -1) <= 0)
247 : {
248 : _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&this->_M_refcount);
249 : _M_destroy(__a);
250 : }
251 : }
252 : } // XXX MT
253 :
254 : void
255 : _M_destroy(const _Alloc&) throw();
256 :
257 : _CharT*
258 : _M_refcopy() throw()
259 : {
260 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
261 : if (__builtin_expect(this != &_S_empty_rep(), false))
262 : #endif
263 : __gnu_cxx::__atomic_add_dispatch(&this->_M_refcount, 1);
264 : return _M_refdata();
265 : } // XXX MT
266 :
267 : _CharT*
268 : _M_clone(const _Alloc&, size_type __res = 0);
269 : };
270 :
271 : // Use empty-base optimization: http://www.cantrip.org/emptyopt.html
272 : struct _Alloc_hider : _Alloc
273 : {
274 : _Alloc_hider(_CharT* __dat, const _Alloc& __a)
275 : : _Alloc(__a), _M_p(__dat) { }
276 :
277 : _CharT* _M_p; // The actual data.
278 : };
279 :
280 : public:
281 : // Data Members (public):
282 : // NB: This is an unsigned type, and thus represents the maximum
283 : // size that the allocator can hold.
284 : /// Value returned by various member functions when they fail.
285 : static const size_type npos = static_cast<size_type>(-1);
286 :
287 : private:
288 : // Data Members (private):
289 : mutable _Alloc_hider _M_dataplus;
290 :
291 : _CharT*
292 : _M_data() const
293 : { return _M_dataplus._M_p; }
294 :
295 : _CharT*
296 : _M_data(_CharT* __p)
297 : { return (_M_dataplus._M_p = __p); }
298 :
299 : _Rep*
300 : _M_rep() const
301 : { return &((reinterpret_cast<_Rep*> (_M_data()))[-1]); }
302 :
303 : // For the internal use we have functions similar to `begin'/`end'
304 : // but they do not call _M_leak.
305 : iterator
306 : _M_ibegin() const
307 : { return iterator(_M_data()); }
308 :
309 : iterator
310 : _M_iend() const
311 : { return iterator(_M_data() + this->size()); }
312 :
313 : void
314 : _M_leak() // for use in begin() & non-const op[]
315 : {
316 : if (!_M_rep()->_M_is_leaked())
317 : _M_leak_hard();
318 : }
319 :
320 : size_type
321 : _M_check(size_type __pos, const char* __s) const
322 : {
323 : if (__pos > this->size())
324 : __throw_out_of_range(__N(__s));
325 : return __pos;
326 : }
327 :
328 : void
329 : _M_check_length(size_type __n1, size_type __n2, const char* __s) const
330 : {
331 : if (this->max_size() - (this->size() - __n1) < __n2)
332 : __throw_length_error(__N(__s));
333 : }
334 :
335 : // NB: _M_limit doesn't check for a bad __pos value.
336 : size_type
337 : _M_limit(size_type __pos, size_type __off) const
338 : {
339 : const bool __testoff = __off < this->size() - __pos;
340 : return __testoff ? __off : this->size() - __pos;
341 : }
342 :
343 : // True if _Rep and source do not overlap.
344 : bool
345 : _M_disjunct(const _CharT* __s) const
346 : {
347 : return (less<const _CharT*>()(__s, _M_data())
348 : || less<const _CharT*>()(_M_data() + this->size(), __s));
349 : }
350 :
351 : // When __n = 1 way faster than the general multichar
352 : // traits_type::copy/move/assign.
353 : static void
354 : _M_copy(_CharT* __d, const _CharT* __s, size_type __n)
355 : {
356 : if (__n == 1)
357 : traits_type::assign(*__d, *__s);
358 : else
359 : traits_type::copy(__d, __s, __n);
360 : }
361 :
362 : static void
363 : _M_move(_CharT* __d, const _CharT* __s, size_type __n)
364 : {
365 : if (__n == 1)
366 : traits_type::assign(*__d, *__s);
367 : else
368 : traits_type::move(__d, __s, __n);
369 : }
370 :
371 : static void
372 : _M_assign(_CharT* __d, size_type __n, _CharT __c)
373 : {
374 : if (__n == 1)
375 : traits_type::assign(*__d, __c);
376 : else
377 : traits_type::assign(__d, __n, __c);
378 : }
379 :
380 : // _S_copy_chars is a separate template to permit specialization
381 : // to optimize for the common case of pointers as iterators.
382 : template<class _Iterator>
383 : static void
384 : _S_copy_chars(_CharT* __p, _Iterator __k1, _Iterator __k2)
385 : {
386 : for (; __k1 != __k2; ++__k1, ++__p)
387 : traits_type::assign(*__p, *__k1); // These types are off.
388 : }
389 :
390 : static void
391 : _S_copy_chars(_CharT* __p, iterator __k1, iterator __k2)
392 : { _S_copy_chars(__p, __k1.base(), __k2.base()); }
393 :
394 : static void
395 : _S_copy_chars(_CharT* __p, const_iterator __k1, const_iterator __k2)
396 : { _S_copy_chars(__p, __k1.base(), __k2.base()); }
397 :
398 : static void
399 : _S_copy_chars(_CharT* __p, _CharT* __k1, _CharT* __k2)
400 : { _M_copy(__p, __k1, __k2 - __k1); }
401 :
402 : static void
403 : _S_copy_chars(_CharT* __p, const _CharT* __k1, const _CharT* __k2)
404 : { _M_copy(__p, __k1, __k2 - __k1); }
405 :
406 : static int
407 : _S_compare(size_type __n1, size_type __n2)
408 : {
409 : const difference_type __d = difference_type(__n1 - __n2);
410 :
411 : if (__d > __gnu_cxx::__numeric_traits<int>::__max)
412 : return __gnu_cxx::__numeric_traits<int>::__max;
413 : else if (__d < __gnu_cxx::__numeric_traits<int>::__min)
414 : return __gnu_cxx::__numeric_traits<int>::__min;
415 : else
416 : return int(__d);
417 : }
418 :
419 : void
420 : _M_mutate(size_type __pos, size_type __len1, size_type __len2);
421 :
422 : void
423 : _M_leak_hard();
424 :
425 : static _Rep&
426 : _S_empty_rep()
427 : { return _Rep::_S_empty_rep(); }
428 :
429 : public:
430 : // Construct/copy/destroy:
431 : // NB: We overload ctors in some cases instead of using default
432 : // arguments, per 17.4.4.4 para. 2 item 2.
433 :
434 : /**
435 : * @brief Default constructor creates an empty string.
436 : */
437 : basic_string()
438 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
439 : : _M_dataplus(_S_empty_rep()._M_refdata(), _Alloc()) { }
440 : #else
441 : : _M_dataplus(_S_construct(size_type(), _CharT(), _Alloc()), _Alloc()){ }
442 : #endif
443 :
444 : /**
445 : * @brief Construct an empty string using allocator @a a.
446 : */
447 : explicit
448 : basic_string(const _Alloc& __a);
449 :
450 : // NB: per LWG issue 42, semantics different from IS:
451 : /**
452 : * @brief Construct string with copy of value of @a str.
453 : * @param __str Source string.
454 : */
455 : basic_string(const basic_string& __str);
456 : /**
457 : * @brief Construct string as copy of a substring.
458 : * @param __str Source string.
459 : * @param __pos Index of first character to copy from.
460 : * @param __n Number of characters to copy (default remainder).
461 : */
462 : basic_string(const basic_string& __str, size_type __pos,
463 : size_type __n = npos);
464 : /**
465 : * @brief Construct string as copy of a substring.
466 : * @param __str Source string.
467 : * @param __pos Index of first character to copy from.
468 : * @param __n Number of characters to copy.
469 : * @param __a Allocator to use.
470 : */
471 : basic_string(const basic_string& __str, size_type __pos,
472 : size_type __n, const _Alloc& __a);
473 :
474 : /**
475 : * @brief Construct string initialized by a character %array.
476 : * @param __s Source character %array.
477 : * @param __n Number of characters to copy.
478 : * @param __a Allocator to use (default is default allocator).
479 : *
480 : * NB: @a __s must have at least @a __n characters, '\\0'
481 : * has no special meaning.
482 : */
483 : basic_string(const _CharT* __s, size_type __n,
484 : const _Alloc& __a = _Alloc());
485 : /**
486 : * @brief Construct string as copy of a C string.
487 : * @param __s Source C string.
488 : * @param __a Allocator to use (default is default allocator).
489 : */
490 : basic_string(const _CharT* __s, const _Alloc& __a = _Alloc());
491 : /**
492 : * @brief Construct string as multiple characters.
493 : * @param __n Number of characters.
494 : * @param __c Character to use.
495 : * @param __a Allocator to use (default is default allocator).
496 : */
497 : basic_string(size_type __n, _CharT __c, const _Alloc& __a = _Alloc());
498 :
499 : #if __cplusplus >= 201103L
500 : /**
501 : * @brief Move construct string.
502 : * @param __str Source string.
503 : *
504 : * The newly-created string contains the exact contents of @a __str.
505 : * @a __str is a valid, but unspecified string.
506 : **/
507 : basic_string(basic_string&& __str) noexcept
508 : : _M_dataplus(__str._M_dataplus)
509 : {
510 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
511 : __str._M_data(_S_empty_rep()._M_refdata());
512 : #else
513 : __str._M_data(_S_construct(size_type(), _CharT(), get_allocator()));
514 : #endif
515 : }
516 :
517 : /**
518 : * @brief Construct string from an initializer %list.
519 : * @param __l std::initializer_list of characters.
520 : * @param __a Allocator to use (default is default allocator).
521 : */
522 : basic_string(initializer_list<_CharT> __l, const _Alloc& __a = _Alloc());
523 : #endif // C++11
524 :
525 : /**
526 : * @brief Construct string as copy of a range.
527 : * @param __beg Start of range.
528 : * @param __end End of range.
529 : * @param __a Allocator to use (default is default allocator).
530 : */
531 : template<class _InputIterator>
532 : basic_string(_InputIterator __beg, _InputIterator __end,
533 : const _Alloc& __a = _Alloc());
534 :
535 : /**
536 : * @brief Destroy the string instance.
537 : */
538 : ~basic_string() _GLIBCXX_NOEXCEPT
539 : { _M_rep()->_M_dispose(this->get_allocator()); }
540 :
541 : /**
542 : * @brief Assign the value of @a str to this string.
543 : * @param __str Source string.
544 : */
545 : basic_string&
546 : operator=(const basic_string& __str)
547 : { return this->assign(__str); }
548 :
549 : /**
550 : * @brief Copy contents of @a s into this string.
551 : * @param __s Source null-terminated string.
552 : */
553 : basic_string&
554 : operator=(const _CharT* __s)
555 : { return this->assign(__s); }
556 :
557 : /**
558 : * @brief Set value to string of length 1.
559 : * @param __c Source character.
560 : *
561 : * Assigning to a character makes this string length 1 and
562 : * (*this)[0] == @a c.
563 : */
564 : basic_string&
565 : operator=(_CharT __c)
566 : {
567 : this->assign(1, __c);
568 : return *this;
569 : }
570 :
571 : #if __cplusplus >= 201103L
572 : /**
573 : * @brief Move assign the value of @a str to this string.
574 : * @param __str Source string.
575 : *
576 : * The contents of @a str are moved into this string (without copying).
577 : * @a str is a valid, but unspecified string.
578 : **/
579 : basic_string&
580 : operator=(basic_string&& __str)
581 : {
582 : // NB: DR 1204.
583 : this->swap(__str);
584 : return *this;
585 : }
586 :
587 : /**
588 : * @brief Set value to string constructed from initializer %list.
589 : * @param __l std::initializer_list.
590 : */
591 : basic_string&
592 : operator=(initializer_list<_CharT> __l)
593 : {
594 : this->assign(__l.begin(), __l.size());
595 : return *this;
596 : }
597 : #endif // C++11
598 :
599 : // Iterators:
600 : /**
601 : * Returns a read/write iterator that points to the first character in
602 : * the %string. Unshares the string.
603 : */
604 : iterator
605 : begin() _GLIBCXX_NOEXCEPT
606 : {
607 : _M_leak();
608 : return iterator(_M_data());
609 : }
610 :
611 : /**
612 : * Returns a read-only (constant) iterator that points to the first
613 : * character in the %string.
614 : */
615 : const_iterator
616 : begin() const _GLIBCXX_NOEXCEPT
617 : { return const_iterator(_M_data()); }
618 :
619 : /**
620 : * Returns a read/write iterator that points one past the last
621 : * character in the %string. Unshares the string.
622 : */
623 : iterator
624 : end() _GLIBCXX_NOEXCEPT
625 : {
626 : _M_leak();
627 : return iterator(_M_data() + this->size());
628 : }
629 :
630 : /**
631 : * Returns a read-only (constant) iterator that points one past the
632 : * last character in the %string.
633 : */
634 : const_iterator
635 : end() const _GLIBCXX_NOEXCEPT
636 : { return const_iterator(_M_data() + this->size()); }
637 :
638 : /**
639 : * Returns a read/write reverse iterator that points to the last
640 : * character in the %string. Iteration is done in reverse element
641 : * order. Unshares the string.
642 : */
643 : reverse_iterator
644 : rbegin() _GLIBCXX_NOEXCEPT
645 : { return reverse_iterator(this->end()); }
646 :
647 : /**
648 : * Returns a read-only (constant) reverse iterator that points
649 : * to the last character in the %string. Iteration is done in
650 : * reverse element order.
651 : */
652 : const_reverse_iterator
653 : rbegin() const _GLIBCXX_NOEXCEPT
654 : { return const_reverse_iterator(this->end()); }
655 :
656 : /**
657 : * Returns a read/write reverse iterator that points to one before the
658 : * first character in the %string. Iteration is done in reverse
659 : * element order. Unshares the string.
660 : */
661 : reverse_iterator
662 : rend() _GLIBCXX_NOEXCEPT
663 : { return reverse_iterator(this->begin()); }
664 :
665 : /**
666 : * Returns a read-only (constant) reverse iterator that points
667 : * to one before the first character in the %string. Iteration
668 : * is done in reverse element order.
669 : */
670 : const_reverse_iterator
671 : rend() const _GLIBCXX_NOEXCEPT
672 : { return const_reverse_iterator(this->begin()); }
673 :
674 : #if __cplusplus >= 201103L
675 : /**
676 : * Returns a read-only (constant) iterator that points to the first
677 : * character in the %string.
678 : */
679 : const_iterator
680 : cbegin() const noexcept
681 : { return const_iterator(this->_M_data()); }
682 :
683 : /**
684 : * Returns a read-only (constant) iterator that points one past the
685 : * last character in the %string.
686 : */
687 : const_iterator
688 : cend() const noexcept
689 : { return const_iterator(this->_M_data() + this->size()); }
690 :
691 : /**
692 : * Returns a read-only (constant) reverse iterator that points
693 : * to the last character in the %string. Iteration is done in
694 : * reverse element order.
695 : */
696 : const_reverse_iterator
697 : crbegin() const noexcept
698 : { return const_reverse_iterator(this->end()); }
699 :
700 : /**
701 : * Returns a read-only (constant) reverse iterator that points
702 : * to one before the first character in the %string. Iteration
703 : * is done in reverse element order.
704 : */
705 : const_reverse_iterator
706 : crend() const noexcept
707 : { return const_reverse_iterator(this->begin()); }
708 : #endif
709 :
710 : public:
711 : // Capacity:
712 : /// Returns the number of characters in the string, not including any
713 : /// null-termination.
714 : size_type
715 : size() const _GLIBCXX_NOEXCEPT
716 : { return _M_rep()->_M_length; }
717 :
718 : /// Returns the number of characters in the string, not including any
719 : /// null-termination.
720 : size_type
721 : length() const _GLIBCXX_NOEXCEPT
722 : { return _M_rep()->_M_length; }
723 :
724 : /// Returns the size() of the largest possible %string.
725 : size_type
726 : max_size() const _GLIBCXX_NOEXCEPT
727 : { return _Rep::_S_max_size; }
728 :
729 : /**
730 : * @brief Resizes the %string to the specified number of characters.
731 : * @param __n Number of characters the %string should contain.
732 : * @param __c Character to fill any new elements.
733 : *
734 : * This function will %resize the %string to the specified
735 : * number of characters. If the number is smaller than the
736 : * %string's current size the %string is truncated, otherwise
737 : * the %string is extended and new elements are %set to @a __c.
738 : */
739 : void
740 : resize(size_type __n, _CharT __c);
741 :
742 : /**
743 : * @brief Resizes the %string to the specified number of characters.
744 : * @param __n Number of characters the %string should contain.
745 : *
746 : * This function will resize the %string to the specified length. If
747 : * the new size is smaller than the %string's current size the %string
748 : * is truncated, otherwise the %string is extended and new characters
749 : * are default-constructed. For basic types such as char, this means
750 : * setting them to 0.
751 : */
752 : void
753 : resize(size_type __n)
754 : { this->resize(__n, _CharT()); }
755 :
756 : #if __cplusplus >= 201103L
757 : /// A non-binding request to reduce capacity() to size().
758 : void
759 : shrink_to_fit()
760 : {
761 : if (capacity() > size())
762 : {
763 : __try
764 : { reserve(0); }
765 : __catch(...)
766 : { }
767 : }
768 : }
769 : #endif
770 :
771 : /**
772 : * Returns the total number of characters that the %string can hold
773 : * before needing to allocate more memory.
774 : */
775 : size_type
776 : capacity() const _GLIBCXX_NOEXCEPT
777 : { return _M_rep()->_M_capacity; }
778 :
779 : /**
780 : * @brief Attempt to preallocate enough memory for specified number of
781 : * characters.
782 : * @param __res_arg Number of characters required.
783 : * @throw std::length_error If @a __res_arg exceeds @c max_size().
784 : *
785 : * This function attempts to reserve enough memory for the
786 : * %string to hold the specified number of characters. If the
787 : * number requested is more than max_size(), length_error is
788 : * thrown.
789 : *
790 : * The advantage of this function is that if optimal code is a
791 : * necessity and the user can determine the string length that will be
792 : * required, the user can reserve the memory in %advance, and thus
793 : * prevent a possible reallocation of memory and copying of %string
794 : * data.
795 : */
796 : void
797 : reserve(size_type __res_arg = 0);
798 :
799 : /**
800 : * Erases the string, making it empty.
801 : */
802 : void
803 : clear() _GLIBCXX_NOEXCEPT
804 : { _M_mutate(0, this->size(), 0); }
805 :
806 : /**
807 : * Returns true if the %string is empty. Equivalent to
808 : * <code>*this == ""</code>.
809 : */
810 : bool
811 : empty() const _GLIBCXX_NOEXCEPT
812 : { return this->size() == 0; }
813 :
814 : // Element access:
815 : /**
816 : * @brief Subscript access to the data contained in the %string.
817 : * @param __pos The index of the character to access.
818 : * @return Read-only (constant) reference to the character.
819 : *
820 : * This operator allows for easy, array-style, data access.
821 : * Note that data access with this operator is unchecked and
822 : * out_of_range lookups are not defined. (For checked lookups
823 : * see at().)
824 : */
825 : const_reference
826 : operator[] (size_type __pos) const
827 : {
828 : _GLIBCXX_DEBUG_ASSERT(__pos <= size());
829 : return _M_data()[__pos];
830 : }
831 :
832 : /**
833 : * @brief Subscript access to the data contained in the %string.
834 : * @param __pos The index of the character to access.
835 : * @return Read/write reference to the character.
836 : *
837 : * This operator allows for easy, array-style, data access.
838 : * Note that data access with this operator is unchecked and
839 : * out_of_range lookups are not defined. (For checked lookups
840 : * see at().) Unshares the string.
841 : */
842 : reference
843 : operator[](size_type __pos)
844 : {
845 : // allow pos == size() as v3 extension:
846 : _GLIBCXX_DEBUG_ASSERT(__pos <= size());
847 : // but be strict in pedantic mode:
848 : _GLIBCXX_DEBUG_PEDASSERT(__pos < size());
849 : _M_leak();
850 : return _M_data()[__pos];
851 : }
852 :
853 : /**
854 : * @brief Provides access to the data contained in the %string.
855 : * @param __n The index of the character to access.
856 : * @return Read-only (const) reference to the character.
857 : * @throw std::out_of_range If @a n is an invalid index.
858 : *
859 : * This function provides for safer data access. The parameter is
860 : * first checked that it is in the range of the string. The function
861 : * throws out_of_range if the check fails.
862 : */
863 : const_reference
864 : at(size_type __n) const
865 : {
866 : if (__n >= this->size())
867 : __throw_out_of_range(__N("basic_string::at"));
868 : return _M_data()[__n];
869 : }
870 :
871 : /**
872 : * @brief Provides access to the data contained in the %string.
873 : * @param __n The index of the character to access.
874 : * @return Read/write reference to the character.
875 : * @throw std::out_of_range If @a n is an invalid index.
876 : *
877 : * This function provides for safer data access. The parameter is
878 : * first checked that it is in the range of the string. The function
879 : * throws out_of_range if the check fails. Success results in
880 : * unsharing the string.
881 : */
882 : reference
883 : at(size_type __n)
884 : {
885 : if (__n >= size())
886 : __throw_out_of_range(__N("basic_string::at"));
887 : _M_leak();
888 : return _M_data()[__n];
889 : }
890 :
891 : #if __cplusplus >= 201103L
892 : /**
893 : * Returns a read/write reference to the data at the first
894 : * element of the %string.
895 : */
896 : reference
897 : front()
898 : { return operator[](0); }
899 :
900 : /**
901 : * Returns a read-only (constant) reference to the data at the first
902 : * element of the %string.
903 : */
904 : const_reference
905 : front() const
906 : { return operator[](0); }
907 :
908 : /**
909 : * Returns a read/write reference to the data at the last
910 : * element of the %string.
911 : */
912 : reference
913 : back()
914 : { return operator[](this->size() - 1); }
915 :
916 : /**
917 : * Returns a read-only (constant) reference to the data at the
918 : * last element of the %string.
919 : */
920 : const_reference
921 : back() const
922 : { return operator[](this->size() - 1); }
923 : #endif
924 :
925 : // Modifiers:
926 : /**
927 : * @brief Append a string to this string.
928 : * @param __str The string to append.
929 : * @return Reference to this string.
930 : */
931 : basic_string&
932 : operator+=(const basic_string& __str)
933 : { return this->append(__str); }
934 :
935 : /**
936 : * @brief Append a C string.
937 : * @param __s The C string to append.
938 : * @return Reference to this string.
939 : */
940 : basic_string&
941 : operator+=(const _CharT* __s)
942 : { return this->append(__s); }
943 :
944 : /**
945 : * @brief Append a character.
946 : * @param __c The character to append.
947 : * @return Reference to this string.
948 : */
949 : basic_string&
950 : operator+=(_CharT __c)
951 : {
952 : this->push_back(__c);
953 : return *this;
954 : }
955 :
956 : #if __cplusplus >= 201103L
957 : /**
958 : * @brief Append an initializer_list of characters.
959 : * @param __l The initializer_list of characters to be appended.
960 : * @return Reference to this string.
961 : */
962 : basic_string&
963 : operator+=(initializer_list<_CharT> __l)
964 : { return this->append(__l.begin(), __l.size()); }
965 : #endif // C++11
966 :
967 : /**
968 : * @brief Append a string to this string.
969 : * @param __str The string to append.
970 : * @return Reference to this string.
971 : */
972 : basic_string&
973 : append(const basic_string& __str);
974 :
975 : /**
976 : * @brief Append a substring.
977 : * @param __str The string to append.
978 : * @param __pos Index of the first character of str to append.
979 : * @param __n The number of characters to append.
980 : * @return Reference to this string.
981 : * @throw std::out_of_range if @a __pos is not a valid index.
982 : *
983 : * This function appends @a __n characters from @a __str
984 : * starting at @a __pos to this string. If @a __n is is larger
985 : * than the number of available characters in @a __str, the
986 : * remainder of @a __str is appended.
987 : */
988 : basic_string&
989 : append(const basic_string& __str, size_type __pos, size_type __n);
990 :
991 : /**
992 : * @brief Append a C substring.
993 : * @param __s The C string to append.
994 : * @param __n The number of characters to append.
995 : * @return Reference to this string.
996 : */
997 : basic_string&
998 : append(const _CharT* __s, size_type __n);
999 :
1000 : /**
1001 : * @brief Append a C string.
1002 : * @param __s The C string to append.
1003 : * @return Reference to this string.
1004 : */
1005 : basic_string&
1006 : append(const _CharT* __s)
1007 : {
1008 : __glibcxx_requires_string(__s);
1009 : return this->append(__s, traits_type::length(__s));
1010 : }
1011 :
1012 : /**
1013 : * @brief Append multiple characters.
1014 : * @param __n The number of characters to append.
1015 : * @param __c The character to use.
1016 : * @return Reference to this string.
1017 : *
1018 : * Appends __n copies of __c to this string.
1019 : */
1020 : basic_string&
1021 : append(size_type __n, _CharT __c);
1022 :
1023 : #if __cplusplus >= 201103L
1024 : /**
1025 : * @brief Append an initializer_list of characters.
1026 : * @param __l The initializer_list of characters to append.
1027 : * @return Reference to this string.
1028 : */
1029 : basic_string&
1030 : append(initializer_list<_CharT> __l)
1031 : { return this->append(__l.begin(), __l.size()); }
1032 : #endif // C++11
1033 :
1034 : /**
1035 : * @brief Append a range of characters.
1036 : * @param __first Iterator referencing the first character to append.
1037 : * @param __last Iterator marking the end of the range.
1038 : * @return Reference to this string.
1039 : *
1040 : * Appends characters in the range [__first,__last) to this string.
1041 : */
1042 : template<class _InputIterator>
1043 : basic_string&
1044 : append(_InputIterator __first, _InputIterator __last)
1045 : { return this->replace(_M_iend(), _M_iend(), __first, __last); }
1046 :
1047 : /**
1048 : * @brief Append a single character.
1049 : * @param __c Character to append.
1050 : */
1051 : void
1052 : push_back(_CharT __c)
1053 : {
1054 : const size_type __len = 1 + this->size();
1055 : if (__len > this->capacity() || _M_rep()->_M_is_shared())
1056 : this->reserve(__len);
1057 : traits_type::assign(_M_data()[this->size()], __c);
1058 : _M_rep()->_M_set_length_and_sharable(__len);
1059 : }
1060 :
1061 : /**
1062 : * @brief Set value to contents of another string.
1063 : * @param __str Source string to use.
1064 : * @return Reference to this string.
1065 : */
1066 : basic_string&
1067 : assign(const basic_string& __str);
1068 :
1069 : #if __cplusplus >= 201103L
1070 : /**
1071 : * @brief Set value to contents of another string.
1072 : * @param __str Source string to use.
1073 : * @return Reference to this string.
1074 : *
1075 : * This function sets this string to the exact contents of @a __str.
1076 : * @a __str is a valid, but unspecified string.
1077 : */
1078 : basic_string&
1079 : assign(basic_string&& __str)
1080 : {
1081 : this->swap(__str);
1082 : return *this;
1083 : }
1084 : #endif // C++11
1085 :
1086 : /**
1087 : * @brief Set value to a substring of a string.
1088 : * @param __str The string to use.
1089 : * @param __pos Index of the first character of str.
1090 : * @param __n Number of characters to use.
1091 : * @return Reference to this string.
1092 : * @throw std::out_of_range if @a pos is not a valid index.
1093 : *
1094 : * This function sets this string to the substring of @a __str
1095 : * consisting of @a __n characters at @a __pos. If @a __n is
1096 : * is larger than the number of available characters in @a
1097 : * __str, the remainder of @a __str is used.
1098 : */
1099 : basic_string&
1100 : assign(const basic_string& __str, size_type __pos, size_type __n)
1101 : { return this->assign(__str._M_data()
1102 : + __str._M_check(__pos, "basic_string::assign"),
1103 : __str._M_limit(__pos, __n)); }
1104 :
1105 : /**
1106 : * @brief Set value to a C substring.
1107 : * @param __s The C string to use.
1108 : * @param __n Number of characters to use.
1109 : * @return Reference to this string.
1110 : *
1111 : * This function sets the value of this string to the first @a __n
1112 : * characters of @a __s. If @a __n is is larger than the number of
1113 : * available characters in @a __s, the remainder of @a __s is used.
1114 : */
1115 : basic_string&
1116 : assign(const _CharT* __s, size_type __n);
1117 :
1118 : /**
1119 : * @brief Set value to contents of a C string.
1120 : * @param __s The C string to use.
1121 : * @return Reference to this string.
1122 : *
1123 : * This function sets the value of this string to the value of @a __s.
1124 : * The data is copied, so there is no dependence on @a __s once the
1125 : * function returns.
1126 : */
1127 : basic_string&
1128 : assign(const _CharT* __s)
1129 : {
1130 : __glibcxx_requires_string(__s);
1131 : return this->assign(__s, traits_type::length(__s));
1132 : }
1133 :
1134 : /**
1135 : * @brief Set value to multiple characters.
1136 : * @param __n Length of the resulting string.
1137 : * @param __c The character to use.
1138 : * @return Reference to this string.
1139 : *
1140 : * This function sets the value of this string to @a __n copies of
1141 : * character @a __c.
1142 : */
1143 : basic_string&
1144 : assign(size_type __n, _CharT __c)
1145 : { return _M_replace_aux(size_type(0), this->size(), __n, __c); }
1146 :
1147 : /**
1148 : * @brief Set value to a range of characters.
1149 : * @param __first Iterator referencing the first character to append.
1150 : * @param __last Iterator marking the end of the range.
1151 : * @return Reference to this string.
1152 : *
1153 : * Sets value of string to characters in the range [__first,__last).
1154 : */
1155 : template<class _InputIterator>
1156 : basic_string&
1157 : assign(_InputIterator __first, _InputIterator __last)
1158 : { return this->replace(_M_ibegin(), _M_iend(), __first, __last); }
1159 :
1160 : #if __cplusplus >= 201103L
1161 : /**
1162 : * @brief Set value to an initializer_list of characters.
1163 : * @param __l The initializer_list of characters to assign.
1164 : * @return Reference to this string.
1165 : */
1166 : basic_string&
1167 : assign(initializer_list<_CharT> __l)
1168 : { return this->assign(__l.begin(), __l.size()); }
1169 : #endif // C++11
1170 :
1171 : /**
1172 : * @brief Insert multiple characters.
1173 : * @param __p Iterator referencing location in string to insert at.
1174 : * @param __n Number of characters to insert
1175 : * @param __c The character to insert.
1176 : * @throw std::length_error If new length exceeds @c max_size().
1177 : *
1178 : * Inserts @a __n copies of character @a __c starting at the
1179 : * position referenced by iterator @a __p. If adding
1180 : * characters causes the length to exceed max_size(),
1181 : * length_error is thrown. The value of the string doesn't
1182 : * change if an error is thrown.
1183 : */
1184 : void
1185 : insert(iterator __p, size_type __n, _CharT __c)
1186 : { this->replace(__p, __p, __n, __c); }
1187 :
1188 : /**
1189 : * @brief Insert a range of characters.
1190 : * @param __p Iterator referencing location in string to insert at.
1191 : * @param __beg Start of range.
1192 : * @param __end End of range.
1193 : * @throw std::length_error If new length exceeds @c max_size().
1194 : *
1195 : * Inserts characters in range [__beg,__end). If adding
1196 : * characters causes the length to exceed max_size(),
1197 : * length_error is thrown. The value of the string doesn't
1198 : * change if an error is thrown.
1199 : */
1200 : template<class _InputIterator>
1201 : void
1202 : insert(iterator __p, _InputIterator __beg, _InputIterator __end)
1203 : { this->replace(__p, __p, __beg, __end); }
1204 :
1205 : #if __cplusplus >= 201103L
1206 : /**
1207 : * @brief Insert an initializer_list of characters.
1208 : * @param __p Iterator referencing location in string to insert at.
1209 : * @param __l The initializer_list of characters to insert.
1210 : * @throw std::length_error If new length exceeds @c max_size().
1211 : */
1212 : void
1213 : insert(iterator __p, initializer_list<_CharT> __l)
1214 : {
1215 : _GLIBCXX_DEBUG_PEDASSERT(__p >= _M_ibegin() && __p <= _M_iend());
1216 : this->insert(__p - _M_ibegin(), __l.begin(), __l.size());
1217 : }
1218 : #endif // C++11
1219 :
1220 : /**
1221 : * @brief Insert value of a string.
1222 : * @param __pos1 Iterator referencing location in string to insert at.
1223 : * @param __str The string to insert.
1224 : * @return Reference to this string.
1225 : * @throw std::length_error If new length exceeds @c max_size().
1226 : *
1227 : * Inserts value of @a __str starting at @a __pos1. If adding
1228 : * characters causes the length to exceed max_size(),
1229 : * length_error is thrown. The value of the string doesn't
1230 : * change if an error is thrown.
1231 : */
1232 : basic_string&
1233 : insert(size_type __pos1, const basic_string& __str)
1234 : { return this->insert(__pos1, __str, size_type(0), __str.size()); }
1235 :
1236 : /**
1237 : * @brief Insert a substring.
1238 : * @param __pos1 Iterator referencing location in string to insert at.
1239 : * @param __str The string to insert.
1240 : * @param __pos2 Start of characters in str to insert.
1241 : * @param __n Number of characters to insert.
1242 : * @return Reference to this string.
1243 : * @throw std::length_error If new length exceeds @c max_size().
1244 : * @throw std::out_of_range If @a pos1 > size() or
1245 : * @a __pos2 > @a str.size().
1246 : *
1247 : * Starting at @a pos1, insert @a __n character of @a __str
1248 : * beginning with @a __pos2. If adding characters causes the
1249 : * length to exceed max_size(), length_error is thrown. If @a
1250 : * __pos1 is beyond the end of this string or @a __pos2 is
1251 : * beyond the end of @a __str, out_of_range is thrown. The
1252 : * value of the string doesn't change if an error is thrown.
1253 : */
1254 : basic_string&
1255 : insert(size_type __pos1, const basic_string& __str,
1256 : size_type __pos2, size_type __n)
1257 : { return this->insert(__pos1, __str._M_data()
1258 : + __str._M_check(__pos2, "basic_string::insert"),
1259 : __str._M_limit(__pos2, __n)); }
1260 :
1261 : /**
1262 : * @brief Insert a C substring.
1263 : * @param __pos Iterator referencing location in string to insert at.
1264 : * @param __s The C string to insert.
1265 : * @param __n The number of characters to insert.
1266 : * @return Reference to this string.
1267 : * @throw std::length_error If new length exceeds @c max_size().
1268 : * @throw std::out_of_range If @a __pos is beyond the end of this
1269 : * string.
1270 : *
1271 : * Inserts the first @a __n characters of @a __s starting at @a
1272 : * __pos. If adding characters causes the length to exceed
1273 : * max_size(), length_error is thrown. If @a __pos is beyond
1274 : * end(), out_of_range is thrown. The value of the string
1275 : * doesn't change if an error is thrown.
1276 : */
1277 : basic_string&
1278 : insert(size_type __pos, const _CharT* __s, size_type __n);
1279 :
1280 : /**
1281 : * @brief Insert a C string.
1282 : * @param __pos Iterator referencing location in string to insert at.
1283 : * @param __s The C string to insert.
1284 : * @return Reference to this string.
1285 : * @throw std::length_error If new length exceeds @c max_size().
1286 : * @throw std::out_of_range If @a pos is beyond the end of this
1287 : * string.
1288 : *
1289 : * Inserts the first @a n characters of @a __s starting at @a __pos. If
1290 : * adding characters causes the length to exceed max_size(),
1291 : * length_error is thrown. If @a __pos is beyond end(), out_of_range is
1292 : * thrown. The value of the string doesn't change if an error is
1293 : * thrown.
1294 : */
1295 : basic_string&
1296 : insert(size_type __pos, const _CharT* __s)
1297 : {
1298 : __glibcxx_requires_string(__s);
1299 : return this->insert(__pos, __s, traits_type::length(__s));
1300 : }
1301 :
1302 : /**
1303 : * @brief Insert multiple characters.
1304 : * @param __pos Index in string to insert at.
1305 : * @param __n Number of characters to insert
1306 : * @param __c The character to insert.
1307 : * @return Reference to this string.
1308 : * @throw std::length_error If new length exceeds @c max_size().
1309 : * @throw std::out_of_range If @a __pos is beyond the end of this
1310 : * string.
1311 : *
1312 : * Inserts @a __n copies of character @a __c starting at index
1313 : * @a __pos. If adding characters causes the length to exceed
1314 : * max_size(), length_error is thrown. If @a __pos > length(),
1315 : * out_of_range is thrown. The value of the string doesn't
1316 : * change if an error is thrown.
1317 : */
1318 : basic_string&
1319 : insert(size_type __pos, size_type __n, _CharT __c)
1320 : { return _M_replace_aux(_M_check(__pos, "basic_string::insert"),
1321 : size_type(0), __n, __c); }
1322 :
1323 : /**
1324 : * @brief Insert one character.
1325 : * @param __p Iterator referencing position in string to insert at.
1326 : * @param __c The character to insert.
1327 : * @return Iterator referencing newly inserted char.
1328 : * @throw std::length_error If new length exceeds @c max_size().
1329 : *
1330 : * Inserts character @a __c at position referenced by @a __p.
1331 : * If adding character causes the length to exceed max_size(),
1332 : * length_error is thrown. If @a __p is beyond end of string,
1333 : * out_of_range is thrown. The value of the string doesn't
1334 : * change if an error is thrown.
1335 : */
1336 : iterator
1337 : insert(iterator __p, _CharT __c)
1338 : {
1339 : _GLIBCXX_DEBUG_PEDASSERT(__p >= _M_ibegin() && __p <= _M_iend());
1340 : const size_type __pos = __p - _M_ibegin();
1341 : _M_replace_aux(__pos, size_type(0), size_type(1), __c);
1342 : _M_rep()->_M_set_leaked();
1343 : return iterator(_M_data() + __pos);
1344 : }
1345 :
1346 : /**
1347 : * @brief Remove characters.
1348 : * @param __pos Index of first character to remove (default 0).
1349 : * @param __n Number of characters to remove (default remainder).
1350 : * @return Reference to this string.
1351 : * @throw std::out_of_range If @a pos is beyond the end of this
1352 : * string.
1353 : *
1354 : * Removes @a __n characters from this string starting at @a
1355 : * __pos. The length of the string is reduced by @a __n. If
1356 : * there are < @a __n characters to remove, the remainder of
1357 : * the string is truncated. If @a __p is beyond end of string,
1358 : * out_of_range is thrown. The value of the string doesn't
1359 : * change if an error is thrown.
1360 : */
1361 : basic_string&
1362 : erase(size_type __pos = 0, size_type __n = npos)
1363 : {
1364 : _M_mutate(_M_check(__pos, "basic_string::erase"),
1365 : _M_limit(__pos, __n), size_type(0));
1366 : return *this;
1367 : }
1368 :
1369 : /**
1370 : * @brief Remove one character.
1371 : * @param __position Iterator referencing the character to remove.
1372 : * @return iterator referencing same location after removal.
1373 : *
1374 : * Removes the character at @a __position from this string. The value
1375 : * of the string doesn't change if an error is thrown.
1376 : */
1377 : iterator
1378 : erase(iterator __position)
1379 : {
1380 : _GLIBCXX_DEBUG_PEDASSERT(__position >= _M_ibegin()
1381 : && __position < _M_iend());
1382 : const size_type __pos = __position - _M_ibegin();
1383 : _M_mutate(__pos, size_type(1), size_type(0));
1384 : _M_rep()->_M_set_leaked();
1385 : return iterator(_M_data() + __pos);
1386 : }
1387 :
1388 : /**
1389 : * @brief Remove a range of characters.
1390 : * @param __first Iterator referencing the first character to remove.
1391 : * @param __last Iterator referencing the end of the range.
1392 : * @return Iterator referencing location of first after removal.
1393 : *
1394 : * Removes the characters in the range [first,last) from this string.
1395 : * The value of the string doesn't change if an error is thrown.
1396 : */
1397 : iterator
1398 : erase(iterator __first, iterator __last);
1399 :
1400 : #if __cplusplus >= 201103L
1401 : /**
1402 : * @brief Remove the last character.
1403 : *
1404 : * The string must be non-empty.
1405 : */
1406 : void
1407 : pop_back()
1408 : { erase(size()-1, 1); }
1409 : #endif // C++11
1410 :
1411 : /**
1412 : * @brief Replace characters with value from another string.
1413 : * @param __pos Index of first character to replace.
1414 : * @param __n Number of characters to be replaced.
1415 : * @param __str String to insert.
1416 : * @return Reference to this string.
1417 : * @throw std::out_of_range If @a pos is beyond the end of this
1418 : * string.
1419 : * @throw std::length_error If new length exceeds @c max_size().
1420 : *
1421 : * Removes the characters in the range [__pos,__pos+__n) from
1422 : * this string. In place, the value of @a __str is inserted.
1423 : * If @a __pos is beyond end of string, out_of_range is thrown.
1424 : * If the length of the result exceeds max_size(), length_error
1425 : * is thrown. The value of the string doesn't change if an
1426 : * error is thrown.
1427 : */
1428 : basic_string&
1429 : replace(size_type __pos, size_type __n, const basic_string& __str)
1430 : { return this->replace(__pos, __n, __str._M_data(), __str.size()); }
1431 :
1432 : /**
1433 : * @brief Replace characters with value from another string.
1434 : * @param __pos1 Index of first character to replace.
1435 : * @param __n1 Number of characters to be replaced.
1436 : * @param __str String to insert.
1437 : * @param __pos2 Index of first character of str to use.
1438 : * @param __n2 Number of characters from str to use.
1439 : * @return Reference to this string.
1440 : * @throw std::out_of_range If @a __pos1 > size() or @a __pos2 >
1441 : * __str.size().
1442 : * @throw std::length_error If new length exceeds @c max_size().
1443 : *
1444 : * Removes the characters in the range [__pos1,__pos1 + n) from this
1445 : * string. In place, the value of @a __str is inserted. If @a __pos is
1446 : * beyond end of string, out_of_range is thrown. If the length of the
1447 : * result exceeds max_size(), length_error is thrown. The value of the
1448 : * string doesn't change if an error is thrown.
1449 : */
1450 : basic_string&
1451 : replace(size_type __pos1, size_type __n1, const basic_string& __str,
1452 : size_type __pos2, size_type __n2)
1453 : { return this->replace(__pos1, __n1, __str._M_data()
1454 : + __str._M_check(__pos2, "basic_string::replace"),
1455 : __str._M_limit(__pos2, __n2)); }
1456 :
1457 : /**
1458 : * @brief Replace characters with value of a C substring.
1459 : * @param __pos Index of first character to replace.
1460 : * @param __n1 Number of characters to be replaced.
1461 : * @param __s C string to insert.
1462 : * @param __n2 Number of characters from @a s to use.
1463 : * @return Reference to this string.
1464 : * @throw std::out_of_range If @a pos1 > size().
1465 : * @throw std::length_error If new length exceeds @c max_size().
1466 : *
1467 : * Removes the characters in the range [__pos,__pos + __n1)
1468 : * from this string. In place, the first @a __n2 characters of
1469 : * @a __s are inserted, or all of @a __s if @a __n2 is too large. If
1470 : * @a __pos is beyond end of string, out_of_range is thrown. If
1471 : * the length of result exceeds max_size(), length_error is
1472 : * thrown. The value of the string doesn't change if an error
1473 : * is thrown.
1474 : */
1475 : basic_string&
1476 : replace(size_type __pos, size_type __n1, const _CharT* __s,
1477 : size_type __n2);
1478 :
1479 : /**
1480 : * @brief Replace characters with value of a C string.
1481 : * @param __pos Index of first character to replace.
1482 : * @param __n1 Number of characters to be replaced.
1483 : * @param __s C string to insert.
1484 : * @return Reference to this string.
1485 : * @throw std::out_of_range If @a pos > size().
1486 : * @throw std::length_error If new length exceeds @c max_size().
1487 : *
1488 : * Removes the characters in the range [__pos,__pos + __n1)
1489 : * from this string. In place, the characters of @a __s are
1490 : * inserted. If @a __pos is beyond end of string, out_of_range
1491 : * is thrown. If the length of result exceeds max_size(),
1492 : * length_error is thrown. The value of the string doesn't
1493 : * change if an error is thrown.
1494 : */
1495 : basic_string&
1496 : replace(size_type __pos, size_type __n1, const _CharT* __s)
1497 : {
1498 : __glibcxx_requires_string(__s);
1499 : return this->replace(__pos, __n1, __s, traits_type::length(__s));
1500 : }
1501 :
1502 : /**
1503 : * @brief Replace characters with multiple characters.
1504 : * @param __pos Index of first character to replace.
1505 : * @param __n1 Number of characters to be replaced.
1506 : * @param __n2 Number of characters to insert.
1507 : * @param __c Character to insert.
1508 : * @return Reference to this string.
1509 : * @throw std::out_of_range If @a __pos > size().
1510 : * @throw std::length_error If new length exceeds @c max_size().
1511 : *
1512 : * Removes the characters in the range [pos,pos + n1) from this
1513 : * string. In place, @a __n2 copies of @a __c are inserted.
1514 : * If @a __pos is beyond end of string, out_of_range is thrown.
1515 : * If the length of result exceeds max_size(), length_error is
1516 : * thrown. The value of the string doesn't change if an error
1517 : * is thrown.
1518 : */
1519 : basic_string&
1520 : replace(size_type __pos, size_type __n1, size_type __n2, _CharT __c)
1521 : { return _M_replace_aux(_M_check(__pos, "basic_string::replace"),
1522 : _M_limit(__pos, __n1), __n2, __c); }
1523 :
1524 : /**
1525 : * @brief Replace range of characters with string.
1526 : * @param __i1 Iterator referencing start of range to replace.
1527 : * @param __i2 Iterator referencing end of range to replace.
1528 : * @param __str String value to insert.
1529 : * @return Reference to this string.
1530 : * @throw std::length_error If new length exceeds @c max_size().
1531 : *
1532 : * Removes the characters in the range [__i1,__i2). In place,
1533 : * the value of @a __str is inserted. If the length of result
1534 : * exceeds max_size(), length_error is thrown. The value of
1535 : * the string doesn't change if an error is thrown.
1536 : */
1537 : basic_string&
1538 : replace(iterator __i1, iterator __i2, const basic_string& __str)
1539 : { return this->replace(__i1, __i2, __str._M_data(), __str.size()); }
1540 :
1541 : /**
1542 : * @brief Replace range of characters with C substring.
1543 : * @param __i1 Iterator referencing start of range to replace.
1544 : * @param __i2 Iterator referencing end of range to replace.
1545 : * @param __s C string value to insert.
1546 : * @param __n Number of characters from s to insert.
1547 : * @return Reference to this string.
1548 : * @throw std::length_error If new length exceeds @c max_size().
1549 : *
1550 : * Removes the characters in the range [__i1,__i2). In place,
1551 : * the first @a __n characters of @a __s are inserted. If the
1552 : * length of result exceeds max_size(), length_error is thrown.
1553 : * The value of the string doesn't change if an error is
1554 : * thrown.
1555 : */
1556 : basic_string&
1557 : replace(iterator __i1, iterator __i2, const _CharT* __s, size_type __n)
1558 : {
1559 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
1560 : && __i2 <= _M_iend());
1561 : return this->replace(__i1 - _M_ibegin(), __i2 - __i1, __s, __n);
1562 : }
1563 :
1564 : /**
1565 : * @brief Replace range of characters with C string.
1566 : * @param __i1 Iterator referencing start of range to replace.
1567 : * @param __i2 Iterator referencing end of range to replace.
1568 : * @param __s C string value to insert.
1569 : * @return Reference to this string.
1570 : * @throw std::length_error If new length exceeds @c max_size().
1571 : *
1572 : * Removes the characters in the range [__i1,__i2). In place,
1573 : * the characters of @a __s are inserted. If the length of
1574 : * result exceeds max_size(), length_error is thrown. The
1575 : * value of the string doesn't change if an error is thrown.
1576 : */
1577 : basic_string&
1578 : replace(iterator __i1, iterator __i2, const _CharT* __s)
1579 : {
1580 : __glibcxx_requires_string(__s);
1581 : return this->replace(__i1, __i2, __s, traits_type::length(__s));
1582 : }
1583 :
1584 : /**
1585 : * @brief Replace range of characters with multiple characters
1586 : * @param __i1 Iterator referencing start of range to replace.
1587 : * @param __i2 Iterator referencing end of range to replace.
1588 : * @param __n Number of characters to insert.
1589 : * @param __c Character to insert.
1590 : * @return Reference to this string.
1591 : * @throw std::length_error If new length exceeds @c max_size().
1592 : *
1593 : * Removes the characters in the range [__i1,__i2). In place,
1594 : * @a __n copies of @a __c are inserted. If the length of
1595 : * result exceeds max_size(), length_error is thrown. The
1596 : * value of the string doesn't change if an error is thrown.
1597 : */
1598 : basic_string&
1599 : replace(iterator __i1, iterator __i2, size_type __n, _CharT __c)
1600 : {
1601 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
1602 : && __i2 <= _M_iend());
1603 : return _M_replace_aux(__i1 - _M_ibegin(), __i2 - __i1, __n, __c);
1604 : }
1605 :
1606 : /**
1607 : * @brief Replace range of characters with range.
1608 : * @param __i1 Iterator referencing start of range to replace.
1609 : * @param __i2 Iterator referencing end of range to replace.
1610 : * @param __k1 Iterator referencing start of range to insert.
1611 : * @param __k2 Iterator referencing end of range to insert.
1612 : * @return Reference to this string.
1613 : * @throw std::length_error If new length exceeds @c max_size().
1614 : *
1615 : * Removes the characters in the range [__i1,__i2). In place,
1616 : * characters in the range [__k1,__k2) are inserted. If the
1617 : * length of result exceeds max_size(), length_error is thrown.
1618 : * The value of the string doesn't change if an error is
1619 : * thrown.
1620 : */
1621 : template<class _InputIterator>
1622 : basic_string&
1623 : replace(iterator __i1, iterator __i2,
1624 : _InputIterator __k1, _InputIterator __k2)
1625 : {
1626 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
1627 : && __i2 <= _M_iend());
1628 : __glibcxx_requires_valid_range(__k1, __k2);
1629 : typedef typename std::__is_integer<_InputIterator>::__type _Integral;
1630 : return _M_replace_dispatch(__i1, __i2, __k1, __k2, _Integral());
1631 : }
1632 :
1633 : // Specializations for the common case of pointer and iterator:
1634 : // useful to avoid the overhead of temporary buffering in _M_replace.
1635 : basic_string&
1636 : replace(iterator __i1, iterator __i2, _CharT* __k1, _CharT* __k2)
1637 : {
1638 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
1639 : && __i2 <= _M_iend());
1640 : __glibcxx_requires_valid_range(__k1, __k2);
1641 : return this->replace(__i1 - _M_ibegin(), __i2 - __i1,
1642 : __k1, __k2 - __k1);
1643 : }
1644 :
1645 : basic_string&
1646 : replace(iterator __i1, iterator __i2,
1647 : const _CharT* __k1, const _CharT* __k2)
1648 : {
1649 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
1650 : && __i2 <= _M_iend());
1651 : __glibcxx_requires_valid_range(__k1, __k2);
1652 : return this->replace(__i1 - _M_ibegin(), __i2 - __i1,
1653 : __k1, __k2 - __k1);
1654 : }
1655 :
1656 : basic_string&
1657 : replace(iterator __i1, iterator __i2, iterator __k1, iterator __k2)
1658 : {
1659 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
1660 : && __i2 <= _M_iend());
1661 : __glibcxx_requires_valid_range(__k1, __k2);
1662 : return this->replace(__i1 - _M_ibegin(), __i2 - __i1,
1663 : __k1.base(), __k2 - __k1);
1664 : }
1665 :
1666 : basic_string&
1667 : replace(iterator __i1, iterator __i2,
1668 : const_iterator __k1, const_iterator __k2)
1669 : {
1670 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
1671 : && __i2 <= _M_iend());
1672 : __glibcxx_requires_valid_range(__k1, __k2);
1673 : return this->replace(__i1 - _M_ibegin(), __i2 - __i1,
1674 : __k1.base(), __k2 - __k1);
1675 : }
1676 :
1677 : #if __cplusplus >= 201103L
1678 : /**
1679 : * @brief Replace range of characters with initializer_list.
1680 : * @param __i1 Iterator referencing start of range to replace.
1681 : * @param __i2 Iterator referencing end of range to replace.
1682 : * @param __l The initializer_list of characters to insert.
1683 : * @return Reference to this string.
1684 : * @throw std::length_error If new length exceeds @c max_size().
1685 : *
1686 : * Removes the characters in the range [__i1,__i2). In place,
1687 : * characters in the range [__k1,__k2) are inserted. If the
1688 : * length of result exceeds max_size(), length_error is thrown.
1689 : * The value of the string doesn't change if an error is
1690 : * thrown.
1691 : */
1692 : basic_string& replace(iterator __i1, iterator __i2,
1693 : initializer_list<_CharT> __l)
1694 : { return this->replace(__i1, __i2, __l.begin(), __l.end()); }
1695 : #endif // C++11
1696 :
1697 : private:
1698 : template<class _Integer>
1699 : basic_string&
1700 : _M_replace_dispatch(iterator __i1, iterator __i2, _Integer __n,
1701 : _Integer __val, __true_type)
1702 : { return _M_replace_aux(__i1 - _M_ibegin(), __i2 - __i1, __n, __val); }
1703 :
1704 : template<class _InputIterator>
1705 : basic_string&
1706 : _M_replace_dispatch(iterator __i1, iterator __i2, _InputIterator __k1,
1707 : _InputIterator __k2, __false_type);
1708 :
1709 : basic_string&
1710 : _M_replace_aux(size_type __pos1, size_type __n1, size_type __n2,
1711 : _CharT __c);
1712 :
1713 : basic_string&
1714 : _M_replace_safe(size_type __pos1, size_type __n1, const _CharT* __s,
1715 : size_type __n2);
1716 :
1717 : // _S_construct_aux is used to implement the 21.3.1 para 15 which
1718 : // requires special behaviour if _InIter is an integral type
1719 : template<class _InIterator>
1720 : static _CharT*
1721 : _S_construct_aux(_InIterator __beg, _InIterator __end,
1722 : const _Alloc& __a, __false_type)
1723 : {
1724 : typedef typename iterator_traits<_InIterator>::iterator_category _Tag;
1725 : return _S_construct(__beg, __end, __a, _Tag());
1726 : }
1727 :
1728 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
1729 : // 438. Ambiguity in the "do the right thing" clause
1730 : template<class _Integer>
1731 : static _CharT*
1732 : _S_construct_aux(_Integer __beg, _Integer __end,
1733 : const _Alloc& __a, __true_type)
1734 : { return _S_construct_aux_2(static_cast<size_type>(__beg),
1735 : __end, __a); }
1736 :
1737 : static _CharT*
1738 : _S_construct_aux_2(size_type __req, _CharT __c, const _Alloc& __a)
1739 : { return _S_construct(__req, __c, __a); }
1740 :
1741 : template<class _InIterator>
1742 : static _CharT*
1743 : _S_construct(_InIterator __beg, _InIterator __end, const _Alloc& __a)
1744 : {
1745 : typedef typename std::__is_integer<_InIterator>::__type _Integral;
1746 : return _S_construct_aux(__beg, __end, __a, _Integral());
1747 : }
1748 :
1749 : // For Input Iterators, used in istreambuf_iterators, etc.
1750 : template<class _InIterator>
1751 : static _CharT*
1752 : _S_construct(_InIterator __beg, _InIterator __end, const _Alloc& __a,
1753 : input_iterator_tag);
1754 :
1755 : // For forward_iterators up to random_access_iterators, used for
1756 : // string::iterator, _CharT*, etc.
1757 : template<class _FwdIterator>
1758 : static _CharT*
1759 : _S_construct(_FwdIterator __beg, _FwdIterator __end, const _Alloc& __a,
1760 : forward_iterator_tag);
1761 :
1762 : static _CharT*
1763 : _S_construct(size_type __req, _CharT __c, const _Alloc& __a);
1764 :
1765 : public:
1766 :
1767 : /**
1768 : * @brief Copy substring into C string.
1769 : * @param __s C string to copy value into.
1770 : * @param __n Number of characters to copy.
1771 : * @param __pos Index of first character to copy.
1772 : * @return Number of characters actually copied
1773 : * @throw std::out_of_range If __pos > size().
1774 : *
1775 : * Copies up to @a __n characters starting at @a __pos into the
1776 : * C string @a __s. If @a __pos is %greater than size(),
1777 : * out_of_range is thrown.
1778 : */
1779 : size_type
1780 : copy(_CharT* __s, size_type __n, size_type __pos = 0) const;
1781 :
1782 : /**
1783 : * @brief Swap contents with another string.
1784 : * @param __s String to swap with.
1785 : *
1786 : * Exchanges the contents of this string with that of @a __s in constant
1787 : * time.
1788 : */
1789 : void
1790 : swap(basic_string& __s);
1791 :
1792 : // String operations:
1793 : /**
1794 : * @brief Return const pointer to null-terminated contents.
1795 : *
1796 : * This is a handle to internal data. Do not modify or dire things may
1797 : * happen.
1798 : */
1799 : const _CharT*
1800 : c_str() const _GLIBCXX_NOEXCEPT
1801 : { return _M_data(); }
1802 :
1803 : /**
1804 : * @brief Return const pointer to contents.
1805 : *
1806 : * This is a handle to internal data. Do not modify or dire things may
1807 : * happen.
1808 : */
1809 : const _CharT*
1810 : data() const _GLIBCXX_NOEXCEPT
1811 : { return _M_data(); }
1812 :
1813 : /**
1814 : * @brief Return copy of allocator used to construct this string.
1815 : */
1816 : allocator_type
1817 : get_allocator() const _GLIBCXX_NOEXCEPT
1818 : { return _M_dataplus; }
1819 :
1820 : /**
1821 : * @brief Find position of a C substring.
1822 : * @param __s C string to locate.
1823 : * @param __pos Index of character to search from.
1824 : * @param __n Number of characters from @a s to search for.
1825 : * @return Index of start of first occurrence.
1826 : *
1827 : * Starting from @a __pos, searches forward for the first @a
1828 : * __n characters in @a __s within this string. If found,
1829 : * returns the index where it begins. If not found, returns
1830 : * npos.
1831 : */
1832 : size_type
1833 : find(const _CharT* __s, size_type __pos, size_type __n) const;
1834 :
1835 : /**
1836 : * @brief Find position of a string.
1837 : * @param __str String to locate.
1838 : * @param __pos Index of character to search from (default 0).
1839 : * @return Index of start of first occurrence.
1840 : *
1841 : * Starting from @a __pos, searches forward for value of @a __str within
1842 : * this string. If found, returns the index where it begins. If not
1843 : * found, returns npos.
1844 : */
1845 : size_type
1846 : find(const basic_string& __str, size_type __pos = 0) const
1847 : _GLIBCXX_NOEXCEPT
1848 : { return this->find(__str.data(), __pos, __str.size()); }
1849 :
1850 : /**
1851 : * @brief Find position of a C string.
1852 : * @param __s C string to locate.
1853 : * @param __pos Index of character to search from (default 0).
1854 : * @return Index of start of first occurrence.
1855 : *
1856 : * Starting from @a __pos, searches forward for the value of @a
1857 : * __s within this string. If found, returns the index where
1858 : * it begins. If not found, returns npos.
1859 : */
1860 : size_type
1861 : find(const _CharT* __s, size_type __pos = 0) const
1862 : {
1863 : __glibcxx_requires_string(__s);
1864 : return this->find(__s, __pos, traits_type::length(__s));
1865 : }
1866 :
1867 : /**
1868 : * @brief Find position of a character.
1869 : * @param __c Character to locate.
1870 : * @param __pos Index of character to search from (default 0).
1871 : * @return Index of first occurrence.
1872 : *
1873 : * Starting from @a __pos, searches forward for @a __c within
1874 : * this string. If found, returns the index where it was
1875 : * found. If not found, returns npos.
1876 : */
1877 : size_type
1878 : find(_CharT __c, size_type __pos = 0) const _GLIBCXX_NOEXCEPT;
1879 :
1880 : /**
1881 : * @brief Find last position of a string.
1882 : * @param __str String to locate.
1883 : * @param __pos Index of character to search back from (default end).
1884 : * @return Index of start of last occurrence.
1885 : *
1886 : * Starting from @a __pos, searches backward for value of @a
1887 : * __str within this string. If found, returns the index where
1888 : * it begins. If not found, returns npos.
1889 : */
1890 : size_type
1891 : rfind(const basic_string& __str, size_type __pos = npos) const
1892 : _GLIBCXX_NOEXCEPT
1893 : { return this->rfind(__str.data(), __pos, __str.size()); }
1894 :
1895 : /**
1896 : * @brief Find last position of a C substring.
1897 : * @param __s C string to locate.
1898 : * @param __pos Index of character to search back from.
1899 : * @param __n Number of characters from s to search for.
1900 : * @return Index of start of last occurrence.
1901 : *
1902 : * Starting from @a __pos, searches backward for the first @a
1903 : * __n characters in @a __s within this string. If found,
1904 : * returns the index where it begins. If not found, returns
1905 : * npos.
1906 : */
1907 : size_type
1908 : rfind(const _CharT* __s, size_type __pos, size_type __n) const;
1909 :
1910 : /**
1911 : * @brief Find last position of a C string.
1912 : * @param __s C string to locate.
1913 : * @param __pos Index of character to start search at (default end).
1914 : * @return Index of start of last occurrence.
1915 : *
1916 : * Starting from @a __pos, searches backward for the value of
1917 : * @a __s within this string. If found, returns the index
1918 : * where it begins. If not found, returns npos.
1919 : */
1920 : size_type
1921 : rfind(const _CharT* __s, size_type __pos = npos) const
1922 : {
1923 : __glibcxx_requires_string(__s);
1924 : return this->rfind(__s, __pos, traits_type::length(__s));
1925 : }
1926 :
1927 : /**
1928 : * @brief Find last position of a character.
1929 : * @param __c Character to locate.
1930 : * @param __pos Index of character to search back from (default end).
1931 : * @return Index of last occurrence.
1932 : *
1933 : * Starting from @a __pos, searches backward for @a __c within
1934 : * this string. If found, returns the index where it was
1935 : * found. If not found, returns npos.
1936 : */
1937 : size_type
1938 : rfind(_CharT __c, size_type __pos = npos) const _GLIBCXX_NOEXCEPT;
1939 :
1940 : /**
1941 : * @brief Find position of a character of string.
1942 : * @param __str String containing characters to locate.
1943 : * @param __pos Index of character to search from (default 0).
1944 : * @return Index of first occurrence.
1945 : *
1946 : * Starting from @a __pos, searches forward for one of the
1947 : * characters of @a __str within this string. If found,
1948 : * returns the index where it was found. If not found, returns
1949 : * npos.
1950 : */
1951 : size_type
1952 : find_first_of(const basic_string& __str, size_type __pos = 0) const
1953 : _GLIBCXX_NOEXCEPT
1954 : { return this->find_first_of(__str.data(), __pos, __str.size()); }
1955 :
1956 : /**
1957 : * @brief Find position of a character of C substring.
1958 : * @param __s String containing characters to locate.
1959 : * @param __pos Index of character to search from.
1960 : * @param __n Number of characters from s to search for.
1961 : * @return Index of first occurrence.
1962 : *
1963 : * Starting from @a __pos, searches forward for one of the
1964 : * first @a __n characters of @a __s within this string. If
1965 : * found, returns the index where it was found. If not found,
1966 : * returns npos.
1967 : */
1968 : size_type
1969 : find_first_of(const _CharT* __s, size_type __pos, size_type __n) const;
1970 :
1971 : /**
1972 : * @brief Find position of a character of C string.
1973 : * @param __s String containing characters to locate.
1974 : * @param __pos Index of character to search from (default 0).
1975 : * @return Index of first occurrence.
1976 : *
1977 : * Starting from @a __pos, searches forward for one of the
1978 : * characters of @a __s within this string. If found, returns
1979 : * the index where it was found. If not found, returns npos.
1980 : */
1981 : size_type
1982 : find_first_of(const _CharT* __s, size_type __pos = 0) const
1983 : {
1984 : __glibcxx_requires_string(__s);
1985 : return this->find_first_of(__s, __pos, traits_type::length(__s));
1986 : }
1987 :
1988 : /**
1989 : * @brief Find position of a character.
1990 : * @param __c Character to locate.
1991 : * @param __pos Index of character to search from (default 0).
1992 : * @return Index of first occurrence.
1993 : *
1994 : * Starting from @a __pos, searches forward for the character
1995 : * @a __c within this string. If found, returns the index
1996 : * where it was found. If not found, returns npos.
1997 : *
1998 : * Note: equivalent to find(__c, __pos).
1999 : */
2000 : size_type
2001 : find_first_of(_CharT __c, size_type __pos = 0) const _GLIBCXX_NOEXCEPT
2002 : { return this->find(__c, __pos); }
2003 :
2004 : /**
2005 : * @brief Find last position of a character of string.
2006 : * @param __str String containing characters to locate.
2007 : * @param __pos Index of character to search back from (default end).
2008 : * @return Index of last occurrence.
2009 : *
2010 : * Starting from @a __pos, searches backward for one of the
2011 : * characters of @a __str within this string. If found,
2012 : * returns the index where it was found. If not found, returns
2013 : * npos.
2014 : */
2015 : size_type
2016 : find_last_of(const basic_string& __str, size_type __pos = npos) const
2017 : _GLIBCXX_NOEXCEPT
2018 : { return this->find_last_of(__str.data(), __pos, __str.size()); }
2019 :
2020 : /**
2021 : * @brief Find last position of a character of C substring.
2022 : * @param __s C string containing characters to locate.
2023 : * @param __pos Index of character to search back from.
2024 : * @param __n Number of characters from s to search for.
2025 : * @return Index of last occurrence.
2026 : *
2027 : * Starting from @a __pos, searches backward for one of the
2028 : * first @a __n characters of @a __s within this string. If
2029 : * found, returns the index where it was found. If not found,
2030 : * returns npos.
2031 : */
2032 : size_type
2033 : find_last_of(const _CharT* __s, size_type __pos, size_type __n) const;
2034 :
2035 : /**
2036 : * @brief Find last position of a character of C string.
2037 : * @param __s C string containing characters to locate.
2038 : * @param __pos Index of character to search back from (default end).
2039 : * @return Index of last occurrence.
2040 : *
2041 : * Starting from @a __pos, searches backward for one of the
2042 : * characters of @a __s within this string. If found, returns
2043 : * the index where it was found. If not found, returns npos.
2044 : */
2045 : size_type
2046 : find_last_of(const _CharT* __s, size_type __pos = npos) const
2047 : {
2048 : __glibcxx_requires_string(__s);
2049 : return this->find_last_of(__s, __pos, traits_type::length(__s));
2050 : }
2051 :
2052 : /**
2053 : * @brief Find last position of a character.
2054 : * @param __c Character to locate.
2055 : * @param __pos Index of character to search back from (default end).
2056 : * @return Index of last occurrence.
2057 : *
2058 : * Starting from @a __pos, searches backward for @a __c within
2059 : * this string. If found, returns the index where it was
2060 : * found. If not found, returns npos.
2061 : *
2062 : * Note: equivalent to rfind(__c, __pos).
2063 : */
2064 : size_type
2065 : find_last_of(_CharT __c, size_type __pos = npos) const _GLIBCXX_NOEXCEPT
2066 : { return this->rfind(__c, __pos); }
2067 :
2068 : /**
2069 : * @brief Find position of a character not in string.
2070 : * @param __str String containing characters to avoid.
2071 : * @param __pos Index of character to search from (default 0).
2072 : * @return Index of first occurrence.
2073 : *
2074 : * Starting from @a __pos, searches forward for a character not contained
2075 : * in @a __str within this string. If found, returns the index where it
2076 : * was found. If not found, returns npos.
2077 : */
2078 : size_type
2079 : find_first_not_of(const basic_string& __str, size_type __pos = 0) const
2080 : _GLIBCXX_NOEXCEPT
2081 : { return this->find_first_not_of(__str.data(), __pos, __str.size()); }
2082 :
2083 : /**
2084 : * @brief Find position of a character not in C substring.
2085 : * @param __s C string containing characters to avoid.
2086 : * @param __pos Index of character to search from.
2087 : * @param __n Number of characters from __s to consider.
2088 : * @return Index of first occurrence.
2089 : *
2090 : * Starting from @a __pos, searches forward for a character not
2091 : * contained in the first @a __n characters of @a __s within
2092 : * this string. If found, returns the index where it was
2093 : * found. If not found, returns npos.
2094 : */
2095 : size_type
2096 : find_first_not_of(const _CharT* __s, size_type __pos,
2097 : size_type __n) const;
2098 :
2099 : /**
2100 : * @brief Find position of a character not in C string.
2101 : * @param __s C string containing characters to avoid.
2102 : * @param __pos Index of character to search from (default 0).
2103 : * @return Index of first occurrence.
2104 : *
2105 : * Starting from @a __pos, searches forward for a character not
2106 : * contained in @a __s within this string. If found, returns
2107 : * the index where it was found. If not found, returns npos.
2108 : */
2109 : size_type
2110 : find_first_not_of(const _CharT* __s, size_type __pos = 0) const
2111 : {
2112 : __glibcxx_requires_string(__s);
2113 : return this->find_first_not_of(__s, __pos, traits_type::length(__s));
2114 : }
2115 :
2116 : /**
2117 : * @brief Find position of a different character.
2118 : * @param __c Character to avoid.
2119 : * @param __pos Index of character to search from (default 0).
2120 : * @return Index of first occurrence.
2121 : *
2122 : * Starting from @a __pos, searches forward for a character
2123 : * other than @a __c within this string. If found, returns the
2124 : * index where it was found. If not found, returns npos.
2125 : */
2126 : size_type
2127 : find_first_not_of(_CharT __c, size_type __pos = 0) const
2128 : _GLIBCXX_NOEXCEPT;
2129 :
2130 : /**
2131 : * @brief Find last position of a character not in string.
2132 : * @param __str String containing characters to avoid.
2133 : * @param __pos Index of character to search back from (default end).
2134 : * @return Index of last occurrence.
2135 : *
2136 : * Starting from @a __pos, searches backward for a character
2137 : * not contained in @a __str within this string. If found,
2138 : * returns the index where it was found. If not found, returns
2139 : * npos.
2140 : */
2141 : size_type
2142 : find_last_not_of(const basic_string& __str, size_type __pos = npos) const
2143 : _GLIBCXX_NOEXCEPT
2144 : { return this->find_last_not_of(__str.data(), __pos, __str.size()); }
2145 :
2146 : /**
2147 : * @brief Find last position of a character not in C substring.
2148 : * @param __s C string containing characters to avoid.
2149 : * @param __pos Index of character to search back from.
2150 : * @param __n Number of characters from s to consider.
2151 : * @return Index of last occurrence.
2152 : *
2153 : * Starting from @a __pos, searches backward for a character not
2154 : * contained in the first @a __n characters of @a __s within this string.
2155 : * If found, returns the index where it was found. If not found,
2156 : * returns npos.
2157 : */
2158 : size_type
2159 : find_last_not_of(const _CharT* __s, size_type __pos,
2160 : size_type __n) const;
2161 : /**
2162 : * @brief Find last position of a character not in C string.
2163 : * @param __s C string containing characters to avoid.
2164 : * @param __pos Index of character to search back from (default end).
2165 : * @return Index of last occurrence.
2166 : *
2167 : * Starting from @a __pos, searches backward for a character
2168 : * not contained in @a __s within this string. If found,
2169 : * returns the index where it was found. If not found, returns
2170 : * npos.
2171 : */
2172 : size_type
2173 : find_last_not_of(const _CharT* __s, size_type __pos = npos) const
2174 : {
2175 : __glibcxx_requires_string(__s);
2176 : return this->find_last_not_of(__s, __pos, traits_type::length(__s));
2177 : }
2178 :
2179 : /**
2180 : * @brief Find last position of a different character.
2181 : * @param __c Character to avoid.
2182 : * @param __pos Index of character to search back from (default end).
2183 : * @return Index of last occurrence.
2184 : *
2185 : * Starting from @a __pos, searches backward for a character other than
2186 : * @a __c within this string. If found, returns the index where it was
2187 : * found. If not found, returns npos.
2188 : */
2189 : size_type
2190 : find_last_not_of(_CharT __c, size_type __pos = npos) const
2191 : _GLIBCXX_NOEXCEPT;
2192 :
2193 : /**
2194 : * @brief Get a substring.
2195 : * @param __pos Index of first character (default 0).
2196 : * @param __n Number of characters in substring (default remainder).
2197 : * @return The new string.
2198 : * @throw std::out_of_range If __pos > size().
2199 : *
2200 : * Construct and return a new string using the @a __n
2201 : * characters starting at @a __pos. If the string is too
2202 : * short, use the remainder of the characters. If @a __pos is
2203 : * beyond the end of the string, out_of_range is thrown.
2204 : */
2205 : basic_string
2206 : substr(size_type __pos = 0, size_type __n = npos) const
2207 : { return basic_string(*this,
2208 : _M_check(__pos, "basic_string::substr"), __n); }
2209 :
2210 : /**
2211 : * @brief Compare to a string.
2212 : * @param __str String to compare against.
2213 : * @return Integer < 0, 0, or > 0.
2214 : *
2215 : * Returns an integer < 0 if this string is ordered before @a
2216 : * __str, 0 if their values are equivalent, or > 0 if this
2217 : * string is ordered after @a __str. Determines the effective
2218 : * length rlen of the strings to compare as the smallest of
2219 : * size() and str.size(). The function then compares the two
2220 : * strings by calling traits::compare(data(), str.data(),rlen).
2221 : * If the result of the comparison is nonzero returns it,
2222 : * otherwise the shorter one is ordered first.
2223 : */
2224 : int
2225 : compare(const basic_string& __str) const
2226 : {
2227 : const size_type __size = this->size();
2228 : const size_type __osize = __str.size();
2229 : const size_type __len = std::min(__size, __osize);
2230 :
2231 : int __r = traits_type::compare(_M_data(), __str.data(), __len);
2232 : if (!__r)
2233 : __r = _S_compare(__size, __osize);
2234 : return __r;
2235 : }
2236 :
2237 : /**
2238 : * @brief Compare substring to a string.
2239 : * @param __pos Index of first character of substring.
2240 : * @param __n Number of characters in substring.
2241 : * @param __str String to compare against.
2242 : * @return Integer < 0, 0, or > 0.
2243 : *
2244 : * Form the substring of this string from the @a __n characters
2245 : * starting at @a __pos. Returns an integer < 0 if the
2246 : * substring is ordered before @a __str, 0 if their values are
2247 : * equivalent, or > 0 if the substring is ordered after @a
2248 : * __str. Determines the effective length rlen of the strings
2249 : * to compare as the smallest of the length of the substring
2250 : * and @a __str.size(). The function then compares the two
2251 : * strings by calling
2252 : * traits::compare(substring.data(),str.data(),rlen). If the
2253 : * result of the comparison is nonzero returns it, otherwise
2254 : * the shorter one is ordered first.
2255 : */
2256 : int
2257 : compare(size_type __pos, size_type __n, const basic_string& __str) const;
2258 :
2259 : /**
2260 : * @brief Compare substring to a substring.
2261 : * @param __pos1 Index of first character of substring.
2262 : * @param __n1 Number of characters in substring.
2263 : * @param __str String to compare against.
2264 : * @param __pos2 Index of first character of substring of str.
2265 : * @param __n2 Number of characters in substring of str.
2266 : * @return Integer < 0, 0, or > 0.
2267 : *
2268 : * Form the substring of this string from the @a __n1
2269 : * characters starting at @a __pos1. Form the substring of @a
2270 : * __str from the @a __n2 characters starting at @a __pos2.
2271 : * Returns an integer < 0 if this substring is ordered before
2272 : * the substring of @a __str, 0 if their values are equivalent,
2273 : * or > 0 if this substring is ordered after the substring of
2274 : * @a __str. Determines the effective length rlen of the
2275 : * strings to compare as the smallest of the lengths of the
2276 : * substrings. The function then compares the two strings by
2277 : * calling
2278 : * traits::compare(substring.data(),str.substr(pos2,n2).data(),rlen).
2279 : * If the result of the comparison is nonzero returns it,
2280 : * otherwise the shorter one is ordered first.
2281 : */
2282 : int
2283 : compare(size_type __pos1, size_type __n1, const basic_string& __str,
2284 : size_type __pos2, size_type __n2) const;
2285 :
2286 : /**
2287 : * @brief Compare to a C string.
2288 : * @param __s C string to compare against.
2289 : * @return Integer < 0, 0, or > 0.
2290 : *
2291 : * Returns an integer < 0 if this string is ordered before @a __s, 0 if
2292 : * their values are equivalent, or > 0 if this string is ordered after
2293 : * @a __s. Determines the effective length rlen of the strings to
2294 : * compare as the smallest of size() and the length of a string
2295 : * constructed from @a __s. The function then compares the two strings
2296 : * by calling traits::compare(data(),s,rlen). If the result of the
2297 : * comparison is nonzero returns it, otherwise the shorter one is
2298 : * ordered first.
2299 : */
2300 : int
2301 : compare(const _CharT* __s) const;
2302 :
2303 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
2304 : // 5 String::compare specification questionable
2305 : /**
2306 : * @brief Compare substring to a C string.
2307 : * @param __pos Index of first character of substring.
2308 : * @param __n1 Number of characters in substring.
2309 : * @param __s C string to compare against.
2310 : * @return Integer < 0, 0, or > 0.
2311 : *
2312 : * Form the substring of this string from the @a __n1
2313 : * characters starting at @a pos. Returns an integer < 0 if
2314 : * the substring is ordered before @a __s, 0 if their values
2315 : * are equivalent, or > 0 if the substring is ordered after @a
2316 : * __s. Determines the effective length rlen of the strings to
2317 : * compare as the smallest of the length of the substring and
2318 : * the length of a string constructed from @a __s. The
2319 : * function then compares the two string by calling
2320 : * traits::compare(substring.data(),__s,rlen). If the result of
2321 : * the comparison is nonzero returns it, otherwise the shorter
2322 : * one is ordered first.
2323 : */
2324 : int
2325 : compare(size_type __pos, size_type __n1, const _CharT* __s) const;
2326 :
2327 : /**
2328 : * @brief Compare substring against a character %array.
2329 : * @param __pos Index of first character of substring.
2330 : * @param __n1 Number of characters in substring.
2331 : * @param __s character %array to compare against.
2332 : * @param __n2 Number of characters of s.
2333 : * @return Integer < 0, 0, or > 0.
2334 : *
2335 : * Form the substring of this string from the @a __n1
2336 : * characters starting at @a __pos. Form a string from the
2337 : * first @a __n2 characters of @a __s. Returns an integer < 0
2338 : * if this substring is ordered before the string from @a __s,
2339 : * 0 if their values are equivalent, or > 0 if this substring
2340 : * is ordered after the string from @a __s. Determines the
2341 : * effective length rlen of the strings to compare as the
2342 : * smallest of the length of the substring and @a __n2. The
2343 : * function then compares the two strings by calling
2344 : * traits::compare(substring.data(),s,rlen). If the result of
2345 : * the comparison is nonzero returns it, otherwise the shorter
2346 : * one is ordered first.
2347 : *
2348 : * NB: s must have at least n2 characters, '\\0' has
2349 : * no special meaning.
2350 : */
2351 : int
2352 : compare(size_type __pos, size_type __n1, const _CharT* __s,
2353 : size_type __n2) const;
2354 : };
2355 :
2356 : // operator+
2357 : /**
2358 : * @brief Concatenate two strings.
2359 : * @param __lhs First string.
2360 : * @param __rhs Last string.
2361 : * @return New string with value of @a __lhs followed by @a __rhs.
2362 : */
2363 : template<typename _CharT, typename _Traits, typename _Alloc>
2364 : basic_string<_CharT, _Traits, _Alloc>
2365 : operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2366 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2367 : {
2368 : basic_string<_CharT, _Traits, _Alloc> __str(__lhs);
2369 : __str.append(__rhs);
2370 : return __str;
2371 : }
2372 :
2373 : /**
2374 : * @brief Concatenate C string and string.
2375 : * @param __lhs First string.
2376 : * @param __rhs Last string.
2377 : * @return New string with value of @a __lhs followed by @a __rhs.
2378 : */
2379 : template<typename _CharT, typename _Traits, typename _Alloc>
2380 : basic_string<_CharT,_Traits,_Alloc>
2381 : operator+(const _CharT* __lhs,
2382 : const basic_string<_CharT,_Traits,_Alloc>& __rhs);
2383 :
2384 : /**
2385 : * @brief Concatenate character and string.
2386 : * @param __lhs First string.
2387 : * @param __rhs Last string.
2388 : * @return New string with @a __lhs followed by @a __rhs.
2389 : */
2390 : template<typename _CharT, typename _Traits, typename _Alloc>
2391 : basic_string<_CharT,_Traits,_Alloc>
2392 : operator+(_CharT __lhs, const basic_string<_CharT,_Traits,_Alloc>& __rhs);
2393 :
2394 : /**
2395 : * @brief Concatenate string and C string.
2396 : * @param __lhs First string.
2397 : * @param __rhs Last string.
2398 : * @return New string with @a __lhs followed by @a __rhs.
2399 : */
2400 : template<typename _CharT, typename _Traits, typename _Alloc>
2401 : inline basic_string<_CharT, _Traits, _Alloc>
2402 : operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2403 : const _CharT* __rhs)
2404 : {
2405 : basic_string<_CharT, _Traits, _Alloc> __str(__lhs);
2406 : __str.append(__rhs);
2407 : return __str;
2408 : }
2409 :
2410 : /**
2411 : * @brief Concatenate string and character.
2412 : * @param __lhs First string.
2413 : * @param __rhs Last string.
2414 : * @return New string with @a __lhs followed by @a __rhs.
2415 : */
2416 : template<typename _CharT, typename _Traits, typename _Alloc>
2417 : inline basic_string<_CharT, _Traits, _Alloc>
2418 : operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs, _CharT __rhs)
2419 : {
2420 : typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
2421 : typedef typename __string_type::size_type __size_type;
2422 : __string_type __str(__lhs);
2423 : __str.append(__size_type(1), __rhs);
2424 : return __str;
2425 : }
2426 :
2427 : #if __cplusplus >= 201103L
2428 : template<typename _CharT, typename _Traits, typename _Alloc>
2429 : inline basic_string<_CharT, _Traits, _Alloc>
2430 : operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
2431 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2432 : { return std::move(__lhs.append(__rhs)); }
2433 :
2434 : template<typename _CharT, typename _Traits, typename _Alloc>
2435 : inline basic_string<_CharT, _Traits, _Alloc>
2436 : operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2437 : basic_string<_CharT, _Traits, _Alloc>&& __rhs)
2438 : { return std::move(__rhs.insert(0, __lhs)); }
2439 :
2440 : template<typename _CharT, typename _Traits, typename _Alloc>
2441 : inline basic_string<_CharT, _Traits, _Alloc>
2442 : operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
2443 : basic_string<_CharT, _Traits, _Alloc>&& __rhs)
2444 : {
2445 : const auto __size = __lhs.size() + __rhs.size();
2446 : const bool __cond = (__size > __lhs.capacity()
2447 : && __size <= __rhs.capacity());
2448 : return __cond ? std::move(__rhs.insert(0, __lhs))
2449 : : std::move(__lhs.append(__rhs));
2450 : }
2451 :
2452 : template<typename _CharT, typename _Traits, typename _Alloc>
2453 : inline basic_string<_CharT, _Traits, _Alloc>
2454 : operator+(const _CharT* __lhs,
2455 : basic_string<_CharT, _Traits, _Alloc>&& __rhs)
2456 : { return std::move(__rhs.insert(0, __lhs)); }
2457 :
2458 : template<typename _CharT, typename _Traits, typename _Alloc>
2459 : inline basic_string<_CharT, _Traits, _Alloc>
2460 : operator+(_CharT __lhs,
2461 : basic_string<_CharT, _Traits, _Alloc>&& __rhs)
2462 : { return std::move(__rhs.insert(0, 1, __lhs)); }
2463 :
2464 : template<typename _CharT, typename _Traits, typename _Alloc>
2465 : inline basic_string<_CharT, _Traits, _Alloc>
2466 : operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
2467 : const _CharT* __rhs)
2468 : { return std::move(__lhs.append(__rhs)); }
2469 :
2470 : template<typename _CharT, typename _Traits, typename _Alloc>
2471 : inline basic_string<_CharT, _Traits, _Alloc>
2472 : operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
2473 : _CharT __rhs)
2474 : { return std::move(__lhs.append(1, __rhs)); }
2475 : #endif
2476 :
2477 : // operator ==
2478 : /**
2479 : * @brief Test equivalence of two strings.
2480 : * @param __lhs First string.
2481 : * @param __rhs Second string.
2482 : * @return True if @a __lhs.compare(@a __rhs) == 0. False otherwise.
2483 : */
2484 : template<typename _CharT, typename _Traits, typename _Alloc>
2485 : inline bool
2486 : operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2487 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2488 : { return __lhs.compare(__rhs) == 0; }
2489 :
2490 : template<typename _CharT>
2491 : inline
2492 : typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value, bool>::__type
2493 : operator==(const basic_string<_CharT>& __lhs,
2494 : const basic_string<_CharT>& __rhs)
2495 0 : { return (__lhs.size() == __rhs.size()
2496 0 : && !std::char_traits<_CharT>::compare(__lhs.data(), __rhs.data(),
2497 0 : __lhs.size())); }
2498 :
2499 : /**
2500 : * @brief Test equivalence of C string and string.
2501 : * @param __lhs C string.
2502 : * @param __rhs String.
2503 : * @return True if @a __rhs.compare(@a __lhs) == 0. False otherwise.
2504 : */
2505 : template<typename _CharT, typename _Traits, typename _Alloc>
2506 : inline bool
2507 : operator==(const _CharT* __lhs,
2508 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2509 : { return __rhs.compare(__lhs) == 0; }
2510 :
2511 : /**
2512 : * @brief Test equivalence of string and C string.
2513 : * @param __lhs String.
2514 : * @param __rhs C string.
2515 : * @return True if @a __lhs.compare(@a __rhs) == 0. False otherwise.
2516 : */
2517 : template<typename _CharT, typename _Traits, typename _Alloc>
2518 : inline bool
2519 : operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2520 : const _CharT* __rhs)
2521 : { return __lhs.compare(__rhs) == 0; }
2522 :
2523 : // operator !=
2524 : /**
2525 : * @brief Test difference of two strings.
2526 : * @param __lhs First string.
2527 : * @param __rhs Second string.
2528 : * @return True if @a __lhs.compare(@a __rhs) != 0. False otherwise.
2529 : */
2530 : template<typename _CharT, typename _Traits, typename _Alloc>
2531 : inline bool
2532 : operator!=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2533 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2534 0 : { return !(__lhs == __rhs); }
2535 :
2536 : /**
2537 : * @brief Test difference of C string and string.
2538 : * @param __lhs C string.
2539 : * @param __rhs String.
2540 : * @return True if @a __rhs.compare(@a __lhs) != 0. False otherwise.
2541 : */
2542 : template<typename _CharT, typename _Traits, typename _Alloc>
2543 : inline bool
2544 : operator!=(const _CharT* __lhs,
2545 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2546 : { return !(__lhs == __rhs); }
2547 :
2548 : /**
2549 : * @brief Test difference of string and C string.
2550 : * @param __lhs String.
2551 : * @param __rhs C string.
2552 : * @return True if @a __lhs.compare(@a __rhs) != 0. False otherwise.
2553 : */
2554 : template<typename _CharT, typename _Traits, typename _Alloc>
2555 : inline bool
2556 : operator!=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2557 : const _CharT* __rhs)
2558 : { return !(__lhs == __rhs); }
2559 :
2560 : // operator <
2561 : /**
2562 : * @brief Test if string precedes string.
2563 : * @param __lhs First string.
2564 : * @param __rhs Second string.
2565 : * @return True if @a __lhs precedes @a __rhs. False otherwise.
2566 : */
2567 : template<typename _CharT, typename _Traits, typename _Alloc>
2568 : inline bool
2569 : operator<(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2570 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2571 122 : { return __lhs.compare(__rhs) < 0; }
2572 :
2573 : /**
2574 : * @brief Test if string precedes C string.
2575 : * @param __lhs String.
2576 : * @param __rhs C string.
2577 : * @return True if @a __lhs precedes @a __rhs. False otherwise.
2578 : */
2579 : template<typename _CharT, typename _Traits, typename _Alloc>
2580 : inline bool
2581 : operator<(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2582 : const _CharT* __rhs)
2583 : { return __lhs.compare(__rhs) < 0; }
2584 :
2585 : /**
2586 : * @brief Test if C string precedes string.
2587 : * @param __lhs C string.
2588 : * @param __rhs String.
2589 : * @return True if @a __lhs precedes @a __rhs. False otherwise.
2590 : */
2591 : template<typename _CharT, typename _Traits, typename _Alloc>
2592 : inline bool
2593 : operator<(const _CharT* __lhs,
2594 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2595 : { return __rhs.compare(__lhs) > 0; }
2596 :
2597 : // operator >
2598 : /**
2599 : * @brief Test if string follows string.
2600 : * @param __lhs First string.
2601 : * @param __rhs Second string.
2602 : * @return True if @a __lhs follows @a __rhs. False otherwise.
2603 : */
2604 : template<typename _CharT, typename _Traits, typename _Alloc>
2605 : inline bool
2606 : operator>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2607 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2608 : { return __lhs.compare(__rhs) > 0; }
2609 :
2610 : /**
2611 : * @brief Test if string follows C string.
2612 : * @param __lhs String.
2613 : * @param __rhs C string.
2614 : * @return True if @a __lhs follows @a __rhs. False otherwise.
2615 : */
2616 : template<typename _CharT, typename _Traits, typename _Alloc>
2617 : inline bool
2618 : operator>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2619 : const _CharT* __rhs)
2620 : { return __lhs.compare(__rhs) > 0; }
2621 :
2622 : /**
2623 : * @brief Test if C string follows string.
2624 : * @param __lhs C string.
2625 : * @param __rhs String.
2626 : * @return True if @a __lhs follows @a __rhs. False otherwise.
2627 : */
2628 : template<typename _CharT, typename _Traits, typename _Alloc>
2629 : inline bool
2630 : operator>(const _CharT* __lhs,
2631 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2632 : { return __rhs.compare(__lhs) < 0; }
2633 :
2634 : // operator <=
2635 : /**
2636 : * @brief Test if string doesn't follow string.
2637 : * @param __lhs First string.
2638 : * @param __rhs Second string.
2639 : * @return True if @a __lhs doesn't follow @a __rhs. False otherwise.
2640 : */
2641 : template<typename _CharT, typename _Traits, typename _Alloc>
2642 : inline bool
2643 : operator<=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2644 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2645 : { return __lhs.compare(__rhs) <= 0; }
2646 :
2647 : /**
2648 : * @brief Test if string doesn't follow C string.
2649 : * @param __lhs String.
2650 : * @param __rhs C string.
2651 : * @return True if @a __lhs doesn't follow @a __rhs. False otherwise.
2652 : */
2653 : template<typename _CharT, typename _Traits, typename _Alloc>
2654 : inline bool
2655 : operator<=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2656 : const _CharT* __rhs)
2657 : { return __lhs.compare(__rhs) <= 0; }
2658 :
2659 : /**
2660 : * @brief Test if C string doesn't follow string.
2661 : * @param __lhs C string.
2662 : * @param __rhs String.
2663 : * @return True if @a __lhs doesn't follow @a __rhs. False otherwise.
2664 : */
2665 : template<typename _CharT, typename _Traits, typename _Alloc>
2666 : inline bool
2667 : operator<=(const _CharT* __lhs,
2668 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2669 : { return __rhs.compare(__lhs) >= 0; }
2670 :
2671 : // operator >=
2672 : /**
2673 : * @brief Test if string doesn't precede string.
2674 : * @param __lhs First string.
2675 : * @param __rhs Second string.
2676 : * @return True if @a __lhs doesn't precede @a __rhs. False otherwise.
2677 : */
2678 : template<typename _CharT, typename _Traits, typename _Alloc>
2679 : inline bool
2680 : operator>=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2681 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2682 : { return __lhs.compare(__rhs) >= 0; }
2683 :
2684 : /**
2685 : * @brief Test if string doesn't precede C string.
2686 : * @param __lhs String.
2687 : * @param __rhs C string.
2688 : * @return True if @a __lhs doesn't precede @a __rhs. False otherwise.
2689 : */
2690 : template<typename _CharT, typename _Traits, typename _Alloc>
2691 : inline bool
2692 : operator>=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2693 : const _CharT* __rhs)
2694 : { return __lhs.compare(__rhs) >= 0; }
2695 :
2696 : /**
2697 : * @brief Test if C string doesn't precede string.
2698 : * @param __lhs C string.
2699 : * @param __rhs String.
2700 : * @return True if @a __lhs doesn't precede @a __rhs. False otherwise.
2701 : */
2702 : template<typename _CharT, typename _Traits, typename _Alloc>
2703 : inline bool
2704 : operator>=(const _CharT* __lhs,
2705 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2706 : { return __rhs.compare(__lhs) <= 0; }
2707 :
2708 : /**
2709 : * @brief Swap contents of two strings.
2710 : * @param __lhs First string.
2711 : * @param __rhs Second string.
2712 : *
2713 : * Exchanges the contents of @a __lhs and @a __rhs in constant time.
2714 : */
2715 : template<typename _CharT, typename _Traits, typename _Alloc>
2716 : inline void
2717 : swap(basic_string<_CharT, _Traits, _Alloc>& __lhs,
2718 : basic_string<_CharT, _Traits, _Alloc>& __rhs)
2719 : { __lhs.swap(__rhs); }
2720 :
2721 : /**
2722 : * @brief Read stream into a string.
2723 : * @param __is Input stream.
2724 : * @param __str Buffer to store into.
2725 : * @return Reference to the input stream.
2726 : *
2727 : * Stores characters from @a __is into @a __str until whitespace is
2728 : * found, the end of the stream is encountered, or str.max_size()
2729 : * is reached. If is.width() is non-zero, that is the limit on the
2730 : * number of characters stored into @a __str. Any previous
2731 : * contents of @a __str are erased.
2732 : */
2733 : template<typename _CharT, typename _Traits, typename _Alloc>
2734 : basic_istream<_CharT, _Traits>&
2735 : operator>>(basic_istream<_CharT, _Traits>& __is,
2736 : basic_string<_CharT, _Traits, _Alloc>& __str);
2737 :
2738 : template<>
2739 : basic_istream<char>&
2740 : operator>>(basic_istream<char>& __is, basic_string<char>& __str);
2741 :
2742 : /**
2743 : * @brief Write string to a stream.
2744 : * @param __os Output stream.
2745 : * @param __str String to write out.
2746 : * @return Reference to the output stream.
2747 : *
2748 : * Output characters of @a __str into os following the same rules as for
2749 : * writing a C string.
2750 : */
2751 : template<typename _CharT, typename _Traits, typename _Alloc>
2752 : inline basic_ostream<_CharT, _Traits>&
2753 : operator<<(basic_ostream<_CharT, _Traits>& __os,
2754 : const basic_string<_CharT, _Traits, _Alloc>& __str)
2755 : {
2756 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
2757 : // 586. string inserter not a formatted function
2758 : return __ostream_insert(__os, __str.data(), __str.size());
2759 : }
2760 :
2761 : /**
2762 : * @brief Read a line from stream into a string.
2763 : * @param __is Input stream.
2764 : * @param __str Buffer to store into.
2765 : * @param __delim Character marking end of line.
2766 : * @return Reference to the input stream.
2767 : *
2768 : * Stores characters from @a __is into @a __str until @a __delim is
2769 : * found, the end of the stream is encountered, or str.max_size()
2770 : * is reached. Any previous contents of @a __str are erased. If
2771 : * @a __delim is encountered, it is extracted but not stored into
2772 : * @a __str.
2773 : */
2774 : template<typename _CharT, typename _Traits, typename _Alloc>
2775 : basic_istream<_CharT, _Traits>&
2776 : getline(basic_istream<_CharT, _Traits>& __is,
2777 : basic_string<_CharT, _Traits, _Alloc>& __str, _CharT __delim);
2778 :
2779 : /**
2780 : * @brief Read a line from stream into a string.
2781 : * @param __is Input stream.
2782 : * @param __str Buffer to store into.
2783 : * @return Reference to the input stream.
2784 : *
2785 : * Stores characters from is into @a __str until '\n' is
2786 : * found, the end of the stream is encountered, or str.max_size()
2787 : * is reached. Any previous contents of @a __str are erased. If
2788 : * end of line is encountered, it is extracted but not stored into
2789 : * @a __str.
2790 : */
2791 : template<typename _CharT, typename _Traits, typename _Alloc>
2792 : inline basic_istream<_CharT, _Traits>&
2793 : getline(basic_istream<_CharT, _Traits>& __is,
2794 : basic_string<_CharT, _Traits, _Alloc>& __str)
2795 : { return getline(__is, __str, __is.widen('\n')); }
2796 :
2797 : template<>
2798 : basic_istream<char>&
2799 : getline(basic_istream<char>& __in, basic_string<char>& __str,
2800 : char __delim);
2801 :
2802 : #ifdef _GLIBCXX_USE_WCHAR_T
2803 : template<>
2804 : basic_istream<wchar_t>&
2805 : getline(basic_istream<wchar_t>& __in, basic_string<wchar_t>& __str,
2806 : wchar_t __delim);
2807 : #endif
2808 :
2809 : _GLIBCXX_END_NAMESPACE_VERSION
2810 : } // namespace
2811 :
2812 : #if ((__cplusplus >= 201103L) && defined(_GLIBCXX_USE_C99) \
2813 : && !defined(_GLIBCXX_HAVE_BROKEN_VSWPRINTF))
2814 :
2815 : #include <ext/string_conversions.h>
2816 :
2817 : namespace std _GLIBCXX_VISIBILITY(default)
2818 : {
2819 : _GLIBCXX_BEGIN_NAMESPACE_VERSION
2820 :
2821 : // 21.4 Numeric Conversions [string.conversions].
2822 : inline int
2823 : stoi(const string& __str, size_t* __idx = 0, int __base = 10)
2824 : { return __gnu_cxx::__stoa<long, int>(&std::strtol, "stoi", __str.c_str(),
2825 : __idx, __base); }
2826 :
2827 : inline long
2828 : stol(const string& __str, size_t* __idx = 0, int __base = 10)
2829 : { return __gnu_cxx::__stoa(&std::strtol, "stol", __str.c_str(),
2830 : __idx, __base); }
2831 :
2832 : inline unsigned long
2833 : stoul(const string& __str, size_t* __idx = 0, int __base = 10)
2834 : { return __gnu_cxx::__stoa(&std::strtoul, "stoul", __str.c_str(),
2835 : __idx, __base); }
2836 :
2837 : inline long long
2838 : stoll(const string& __str, size_t* __idx = 0, int __base = 10)
2839 : { return __gnu_cxx::__stoa(&std::strtoll, "stoll", __str.c_str(),
2840 : __idx, __base); }
2841 :
2842 : inline unsigned long long
2843 : stoull(const string& __str, size_t* __idx = 0, int __base = 10)
2844 : { return __gnu_cxx::__stoa(&std::strtoull, "stoull", __str.c_str(),
2845 : __idx, __base); }
2846 :
2847 : // NB: strtof vs strtod.
2848 : inline float
2849 : stof(const string& __str, size_t* __idx = 0)
2850 : { return __gnu_cxx::__stoa(&std::strtof, "stof", __str.c_str(), __idx); }
2851 :
2852 : inline double
2853 : stod(const string& __str, size_t* __idx = 0)
2854 : { return __gnu_cxx::__stoa(&std::strtod, "stod", __str.c_str(), __idx); }
2855 :
2856 : inline long double
2857 : stold(const string& __str, size_t* __idx = 0)
2858 : { return __gnu_cxx::__stoa(&std::strtold, "stold", __str.c_str(), __idx); }
2859 :
2860 : // NB: (v)snprintf vs sprintf.
2861 :
2862 : // DR 1261.
2863 : inline string
2864 : to_string(int __val)
2865 : { return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, 4 * sizeof(int),
2866 : "%d", __val); }
2867 :
2868 : inline string
2869 : to_string(unsigned __val)
2870 : { return __gnu_cxx::__to_xstring<string>(&std::vsnprintf,
2871 : 4 * sizeof(unsigned),
2872 : "%u", __val); }
2873 :
2874 : inline string
2875 : to_string(long __val)
2876 : { return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, 4 * sizeof(long),
2877 : "%ld", __val); }
2878 :
2879 : inline string
2880 : to_string(unsigned long __val)
2881 : { return __gnu_cxx::__to_xstring<string>(&std::vsnprintf,
2882 : 4 * sizeof(unsigned long),
2883 : "%lu", __val); }
2884 :
2885 : inline string
2886 : to_string(long long __val)
2887 : { return __gnu_cxx::__to_xstring<string>(&std::vsnprintf,
2888 : 4 * sizeof(long long),
2889 : "%lld", __val); }
2890 :
2891 : inline string
2892 : to_string(unsigned long long __val)
2893 : { return __gnu_cxx::__to_xstring<string>(&std::vsnprintf,
2894 : 4 * sizeof(unsigned long long),
2895 : "%llu", __val); }
2896 :
2897 : inline string
2898 : to_string(float __val)
2899 : {
2900 : const int __n =
2901 : __gnu_cxx::__numeric_traits<float>::__max_exponent10 + 20;
2902 : return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, __n,
2903 : "%f", __val);
2904 : }
2905 :
2906 : inline string
2907 : to_string(double __val)
2908 : {
2909 : const int __n =
2910 : __gnu_cxx::__numeric_traits<double>::__max_exponent10 + 20;
2911 : return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, __n,
2912 : "%f", __val);
2913 : }
2914 :
2915 : inline string
2916 : to_string(long double __val)
2917 : {
2918 : const int __n =
2919 : __gnu_cxx::__numeric_traits<long double>::__max_exponent10 + 20;
2920 : return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, __n,
2921 : "%Lf", __val);
2922 : }
2923 :
2924 : #ifdef _GLIBCXX_USE_WCHAR_T
2925 : inline int
2926 : stoi(const wstring& __str, size_t* __idx = 0, int __base = 10)
2927 : { return __gnu_cxx::__stoa<long, int>(&std::wcstol, "stoi", __str.c_str(),
2928 : __idx, __base); }
2929 :
2930 : inline long
2931 : stol(const wstring& __str, size_t* __idx = 0, int __base = 10)
2932 : { return __gnu_cxx::__stoa(&std::wcstol, "stol", __str.c_str(),
2933 : __idx, __base); }
2934 :
2935 : inline unsigned long
2936 : stoul(const wstring& __str, size_t* __idx = 0, int __base = 10)
2937 : { return __gnu_cxx::__stoa(&std::wcstoul, "stoul", __str.c_str(),
2938 : __idx, __base); }
2939 :
2940 : inline long long
2941 : stoll(const wstring& __str, size_t* __idx = 0, int __base = 10)
2942 : { return __gnu_cxx::__stoa(&std::wcstoll, "stoll", __str.c_str(),
2943 : __idx, __base); }
2944 :
2945 : inline unsigned long long
2946 : stoull(const wstring& __str, size_t* __idx = 0, int __base = 10)
2947 : { return __gnu_cxx::__stoa(&std::wcstoull, "stoull", __str.c_str(),
2948 : __idx, __base); }
2949 :
2950 : // NB: wcstof vs wcstod.
2951 : inline float
2952 : stof(const wstring& __str, size_t* __idx = 0)
2953 : { return __gnu_cxx::__stoa(&std::wcstof, "stof", __str.c_str(), __idx); }
2954 :
2955 : inline double
2956 : stod(const wstring& __str, size_t* __idx = 0)
2957 : { return __gnu_cxx::__stoa(&std::wcstod, "stod", __str.c_str(), __idx); }
2958 :
2959 : inline long double
2960 : stold(const wstring& __str, size_t* __idx = 0)
2961 : { return __gnu_cxx::__stoa(&std::wcstold, "stold", __str.c_str(), __idx); }
2962 :
2963 : // DR 1261.
2964 : inline wstring
2965 : to_wstring(int __val)
2966 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf, 4 * sizeof(int),
2967 : L"%d", __val); }
2968 :
2969 : inline wstring
2970 : to_wstring(unsigned __val)
2971 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf,
2972 : 4 * sizeof(unsigned),
2973 : L"%u", __val); }
2974 :
2975 : inline wstring
2976 : to_wstring(long __val)
2977 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf, 4 * sizeof(long),
2978 : L"%ld", __val); }
2979 :
2980 : inline wstring
2981 : to_wstring(unsigned long __val)
2982 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf,
2983 : 4 * sizeof(unsigned long),
2984 : L"%lu", __val); }
2985 :
2986 : inline wstring
2987 : to_wstring(long long __val)
2988 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf,
2989 : 4 * sizeof(long long),
2990 : L"%lld", __val); }
2991 :
2992 : inline wstring
2993 : to_wstring(unsigned long long __val)
2994 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf,
2995 : 4 * sizeof(unsigned long long),
2996 : L"%llu", __val); }
2997 :
2998 : inline wstring
2999 : to_wstring(float __val)
3000 : {
3001 : const int __n =
3002 : __gnu_cxx::__numeric_traits<float>::__max_exponent10 + 20;
3003 : return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf, __n,
3004 : L"%f", __val);
3005 : }
3006 :
3007 : inline wstring
3008 : to_wstring(double __val)
3009 : {
3010 : const int __n =
3011 : __gnu_cxx::__numeric_traits<double>::__max_exponent10 + 20;
3012 : return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf, __n,
3013 : L"%f", __val);
3014 : }
3015 :
3016 : inline wstring
3017 : to_wstring(long double __val)
3018 : {
3019 : const int __n =
3020 : __gnu_cxx::__numeric_traits<long double>::__max_exponent10 + 20;
3021 : return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf, __n,
3022 : L"%Lf", __val);
3023 : }
3024 : #endif
3025 :
3026 : _GLIBCXX_END_NAMESPACE_VERSION
3027 : } // namespace
3028 :
3029 : #endif /* C++11 && _GLIBCXX_USE_C99 ... */
3030 :
3031 : #if __cplusplus >= 201103L
3032 :
3033 : #include <bits/functional_hash.h>
3034 :
3035 : namespace std _GLIBCXX_VISIBILITY(default)
3036 : {
3037 : _GLIBCXX_BEGIN_NAMESPACE_VERSION
3038 :
3039 : // DR 1182.
3040 :
3041 : #ifndef _GLIBCXX_COMPATIBILITY_CXX0X
3042 : /// std::hash specialization for string.
3043 : template<>
3044 : struct hash<string>
3045 : : public __hash_base<size_t, string>
3046 : {
3047 : size_t
3048 : operator()(const string& __s) const noexcept
3049 : { return std::_Hash_impl::hash(__s.data(), __s.length()); }
3050 : };
3051 :
3052 : template<>
3053 : struct __is_fast_hash<hash<string>> : std::false_type
3054 : { };
3055 :
3056 : #ifdef _GLIBCXX_USE_WCHAR_T
3057 : /// std::hash specialization for wstring.
3058 : template<>
3059 : struct hash<wstring>
3060 : : public __hash_base<size_t, wstring>
3061 : {
3062 : size_t
3063 : operator()(const wstring& __s) const noexcept
3064 : { return std::_Hash_impl::hash(__s.data(),
3065 : __s.length() * sizeof(wchar_t)); }
3066 : };
3067 :
3068 : template<>
3069 : struct __is_fast_hash<hash<wstring>> : std::false_type
3070 : { };
3071 : #endif
3072 : #endif /* _GLIBCXX_COMPATIBILITY_CXX0X */
3073 :
3074 : #ifdef _GLIBCXX_USE_C99_STDINT_TR1
3075 : /// std::hash specialization for u16string.
3076 : template<>
3077 : struct hash<u16string>
3078 : : public __hash_base<size_t, u16string>
3079 : {
3080 : size_t
3081 : operator()(const u16string& __s) const noexcept
3082 : { return std::_Hash_impl::hash(__s.data(),
3083 : __s.length() * sizeof(char16_t)); }
3084 : };
3085 :
3086 : template<>
3087 : struct __is_fast_hash<hash<u16string>> : std::false_type
3088 : { };
3089 :
3090 : /// std::hash specialization for u32string.
3091 : template<>
3092 : struct hash<u32string>
3093 : : public __hash_base<size_t, u32string>
3094 : {
3095 : size_t
3096 : operator()(const u32string& __s) const noexcept
3097 : { return std::_Hash_impl::hash(__s.data(),
3098 : __s.length() * sizeof(char32_t)); }
3099 : };
3100 :
3101 : template<>
3102 : struct __is_fast_hash<hash<u32string>> : std::false_type
3103 : { };
3104 : #endif
3105 :
3106 : _GLIBCXX_END_NAMESPACE_VERSION
3107 : } // namespace
3108 :
3109 : #endif // C++11
3110 :
3111 : #endif /* _BASIC_STRING_H */
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