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1 : // Components for manipulating sequences of characters -*- C++ -*-
2 :
3 : // Copyright (C) 1997-2014 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 0 : _S_empty_rep() _GLIBCXX_NOEXCEPT
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 0 : void* __p = reinterpret_cast<void*>(&_S_empty_rep_storage);
187 0 : return *reinterpret_cast<_Rep*>(__p);
188 : }
189 :
190 : bool
191 0 : _M_is_leaked() const _GLIBCXX_NOEXCEPT
192 0 : { return this->_M_refcount < 0; }
193 :
194 : bool
195 : _M_is_shared() const _GLIBCXX_NOEXCEPT
196 : { return this->_M_refcount > 0; }
197 :
198 : void
199 : _M_set_leaked() _GLIBCXX_NOEXCEPT
200 : { this->_M_refcount = -1; }
201 :
202 : void
203 0 : _M_set_sharable() _GLIBCXX_NOEXCEPT
204 0 : { this->_M_refcount = 0; }
205 :
206 : void
207 0 : _M_set_length_and_sharable(size_type __n) _GLIBCXX_NOEXCEPT
208 : {
209 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
210 0 : if (__builtin_expect(this != &_S_empty_rep(), false))
211 : #endif
212 : {
213 0 : this->_M_set_sharable(); // One reference.
214 0 : this->_M_length = __n;
215 0 : 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 0 : }
220 :
221 : _CharT*
222 0 : _M_refdata() throw()
223 0 : { 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 0 : _M_dispose(const _Alloc& __a) _GLIBCXX_NOEXCEPT
238 : {
239 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
240 0 : 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 0 : if (__gnu_cxx::__exchange_and_add_dispatch(&this->_M_refcount,
246 0 : -1) <= 0)
247 : {
248 : _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&this->_M_refcount);
249 0 : _M_destroy(__a);
250 : }
251 : }
252 0 : } // 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 0 : struct _Alloc_hider : _Alloc
273 : {
274 0 : _Alloc_hider(_CharT* __dat, const _Alloc& __a) _GLIBCXX_NOEXCEPT
275 0 : : _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 0 : _M_data() const _GLIBCXX_NOEXCEPT
293 0 : { return _M_dataplus._M_p; }
294 :
295 : _CharT*
296 0 : _M_data(_CharT* __p) _GLIBCXX_NOEXCEPT
297 0 : { return (_M_dataplus._M_p = __p); }
298 :
299 : _Rep*
300 0 : _M_rep() const _GLIBCXX_NOEXCEPT
301 0 : { 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 _GLIBCXX_NOEXCEPT
307 : { return iterator(_M_data()); }
308 :
309 : iterator
310 : _M_iend() const _GLIBCXX_NOEXCEPT
311 : { return iterator(_M_data() + this->size()); }
312 :
313 : void
314 0 : _M_leak() // for use in begin() & non-const op[]
315 : {
316 0 : if (!_M_rep()->_M_is_leaked())
317 0 : _M_leak_hard();
318 0 : }
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_fmt(__N("%s: __pos (which is %zu) > "
325 : "this->size() (which is %zu)"),
326 : __s, __pos, this->size());
327 : return __pos;
328 : }
329 :
330 : void
331 : _M_check_length(size_type __n1, size_type __n2, const char* __s) const
332 : {
333 : if (this->max_size() - (this->size() - __n1) < __n2)
334 : __throw_length_error(__N(__s));
335 : }
336 :
337 : // NB: _M_limit doesn't check for a bad __pos value.
338 : size_type
339 : _M_limit(size_type __pos, size_type __off) const _GLIBCXX_NOEXCEPT
340 : {
341 : const bool __testoff = __off < this->size() - __pos;
342 : return __testoff ? __off : this->size() - __pos;
343 : }
344 :
345 : // True if _Rep and source do not overlap.
346 : bool
347 : _M_disjunct(const _CharT* __s) const _GLIBCXX_NOEXCEPT
348 : {
349 : return (less<const _CharT*>()(__s, _M_data())
350 : || less<const _CharT*>()(_M_data() + this->size(), __s));
351 : }
352 :
353 : // When __n = 1 way faster than the general multichar
354 : // traits_type::copy/move/assign.
355 : static void
356 0 : _M_copy(_CharT* __d, const _CharT* __s, size_type __n) _GLIBCXX_NOEXCEPT
357 : {
358 0 : if (__n == 1)
359 0 : traits_type::assign(*__d, *__s);
360 : else
361 0 : traits_type::copy(__d, __s, __n);
362 0 : }
363 :
364 : static void
365 : _M_move(_CharT* __d, const _CharT* __s, size_type __n) _GLIBCXX_NOEXCEPT
366 : {
367 : if (__n == 1)
368 : traits_type::assign(*__d, *__s);
369 : else
370 : traits_type::move(__d, __s, __n);
371 : }
372 :
373 : static void
374 : _M_assign(_CharT* __d, size_type __n, _CharT __c) _GLIBCXX_NOEXCEPT
375 : {
376 : if (__n == 1)
377 : traits_type::assign(*__d, __c);
378 : else
379 : traits_type::assign(__d, __n, __c);
380 : }
381 :
382 : // _S_copy_chars is a separate template to permit specialization
383 : // to optimize for the common case of pointers as iterators.
384 : template<class _Iterator>
385 : static void
386 : _S_copy_chars(_CharT* __p, _Iterator __k1, _Iterator __k2)
387 : _GLIBCXX_NOEXCEPT
388 : {
389 : for (; __k1 != __k2; ++__k1, ++__p)
390 : traits_type::assign(*__p, *__k1); // These types are off.
391 : }
392 :
393 : static void
394 : _S_copy_chars(_CharT* __p, iterator __k1, iterator __k2) _GLIBCXX_NOEXCEPT
395 : { _S_copy_chars(__p, __k1.base(), __k2.base()); }
396 :
397 : static void
398 : _S_copy_chars(_CharT* __p, const_iterator __k1, const_iterator __k2)
399 : _GLIBCXX_NOEXCEPT
400 : { _S_copy_chars(__p, __k1.base(), __k2.base()); }
401 :
402 : static void
403 0 : _S_copy_chars(_CharT* __p, _CharT* __k1, _CharT* __k2) _GLIBCXX_NOEXCEPT
404 0 : { _M_copy(__p, __k1, __k2 - __k1); }
405 :
406 : static void
407 : _S_copy_chars(_CharT* __p, const _CharT* __k1, const _CharT* __k2)
408 : _GLIBCXX_NOEXCEPT
409 : { _M_copy(__p, __k1, __k2 - __k1); }
410 :
411 : static int
412 0 : _S_compare(size_type __n1, size_type __n2) _GLIBCXX_NOEXCEPT
413 : {
414 0 : const difference_type __d = difference_type(__n1 - __n2);
415 :
416 0 : if (__d > __gnu_cxx::__numeric_traits<int>::__max)
417 0 : return __gnu_cxx::__numeric_traits<int>::__max;
418 0 : else if (__d < __gnu_cxx::__numeric_traits<int>::__min)
419 0 : return __gnu_cxx::__numeric_traits<int>::__min;
420 : else
421 0 : return int(__d);
422 : }
423 :
424 : void
425 : _M_mutate(size_type __pos, size_type __len1, size_type __len2);
426 :
427 : void
428 : _M_leak_hard();
429 :
430 : static _Rep&
431 0 : _S_empty_rep() _GLIBCXX_NOEXCEPT
432 0 : { return _Rep::_S_empty_rep(); }
433 :
434 : public:
435 : // Construct/copy/destroy:
436 : // NB: We overload ctors in some cases instead of using default
437 : // arguments, per 17.4.4.4 para. 2 item 2.
438 :
439 : /**
440 : * @brief Default constructor creates an empty string.
441 : */
442 0 : basic_string()
443 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
444 0 : : _M_dataplus(_S_empty_rep()._M_refdata(), _Alloc()) { }
445 : #else
446 : : _M_dataplus(_S_construct(size_type(), _CharT(), _Alloc()), _Alloc()){ }
447 : #endif
448 :
449 : /**
450 : * @brief Construct an empty string using allocator @a a.
451 : */
452 : explicit
453 : basic_string(const _Alloc& __a);
454 :
455 : // NB: per LWG issue 42, semantics different from IS:
456 : /**
457 : * @brief Construct string with copy of value of @a str.
458 : * @param __str Source string.
459 : */
460 : basic_string(const basic_string& __str);
461 : /**
462 : * @brief Construct string as copy of a substring.
463 : * @param __str Source string.
464 : * @param __pos Index of first character to copy from.
465 : * @param __n Number of characters to copy (default remainder).
466 : */
467 : basic_string(const basic_string& __str, size_type __pos,
468 : size_type __n = npos);
469 : /**
470 : * @brief Construct string as copy of a substring.
471 : * @param __str Source string.
472 : * @param __pos Index of first character to copy from.
473 : * @param __n Number of characters to copy.
474 : * @param __a Allocator to use.
475 : */
476 : basic_string(const basic_string& __str, size_type __pos,
477 : size_type __n, const _Alloc& __a);
478 :
479 : /**
480 : * @brief Construct string initialized by a character %array.
481 : * @param __s Source character %array.
482 : * @param __n Number of characters to copy.
483 : * @param __a Allocator to use (default is default allocator).
484 : *
485 : * NB: @a __s must have at least @a __n characters, '\\0'
486 : * has no special meaning.
487 : */
488 : basic_string(const _CharT* __s, size_type __n,
489 : const _Alloc& __a = _Alloc());
490 : /**
491 : * @brief Construct string as copy of a C string.
492 : * @param __s Source C string.
493 : * @param __a Allocator to use (default is default allocator).
494 : */
495 : basic_string(const _CharT* __s, const _Alloc& __a = _Alloc());
496 : /**
497 : * @brief Construct string as multiple characters.
498 : * @param __n Number of characters.
499 : * @param __c Character to use.
500 : * @param __a Allocator to use (default is default allocator).
501 : */
502 : basic_string(size_type __n, _CharT __c, const _Alloc& __a = _Alloc());
503 :
504 : #if __cplusplus >= 201103L
505 : /**
506 : * @brief Move construct string.
507 : * @param __str Source string.
508 : *
509 : * The newly-created string contains the exact contents of @a __str.
510 : * @a __str is a valid, but unspecified string.
511 : **/
512 0 : basic_string(basic_string&& __str)
513 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
514 : noexcept // FIXME C++11: should always be noexcept.
515 : #endif
516 0 : : _M_dataplus(__str._M_dataplus)
517 : {
518 : #if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
519 0 : __str._M_data(_S_empty_rep()._M_refdata());
520 : #else
521 : __str._M_data(_S_construct(size_type(), _CharT(), get_allocator()));
522 : #endif
523 0 : }
524 :
525 : /**
526 : * @brief Construct string from an initializer %list.
527 : * @param __l std::initializer_list of characters.
528 : * @param __a Allocator to use (default is default allocator).
529 : */
530 : basic_string(initializer_list<_CharT> __l, const _Alloc& __a = _Alloc());
531 : #endif // C++11
532 :
533 : /**
534 : * @brief Construct string as copy of a range.
535 : * @param __beg Start of range.
536 : * @param __end End of range.
537 : * @param __a Allocator to use (default is default allocator).
538 : */
539 : template<class _InputIterator>
540 : basic_string(_InputIterator __beg, _InputIterator __end,
541 : const _Alloc& __a = _Alloc());
542 :
543 : /**
544 : * @brief Destroy the string instance.
545 : */
546 0 : ~basic_string() _GLIBCXX_NOEXCEPT
547 0 : { _M_rep()->_M_dispose(this->get_allocator()); }
548 :
549 : /**
550 : * @brief Assign the value of @a str to this string.
551 : * @param __str Source string.
552 : */
553 : basic_string&
554 0 : operator=(const basic_string& __str)
555 0 : { return this->assign(__str); }
556 :
557 : /**
558 : * @brief Copy contents of @a s into this string.
559 : * @param __s Source null-terminated string.
560 : */
561 : basic_string&
562 0 : operator=(const _CharT* __s)
563 0 : { return this->assign(__s); }
564 :
565 : /**
566 : * @brief Set value to string of length 1.
567 : * @param __c Source character.
568 : *
569 : * Assigning to a character makes this string length 1 and
570 : * (*this)[0] == @a c.
571 : */
572 : basic_string&
573 : operator=(_CharT __c)
574 : {
575 : this->assign(1, __c);
576 : return *this;
577 : }
578 :
579 : #if __cplusplus >= 201103L
580 : /**
581 : * @brief Move assign the value of @a str to this string.
582 : * @param __str Source string.
583 : *
584 : * The contents of @a str are moved into this string (without copying).
585 : * @a str is a valid, but unspecified string.
586 : **/
587 : // PR 58265, this should be noexcept.
588 : basic_string&
589 0 : operator=(basic_string&& __str)
590 : {
591 : // NB: DR 1204.
592 0 : this->swap(__str);
593 0 : return *this;
594 : }
595 :
596 : /**
597 : * @brief Set value to string constructed from initializer %list.
598 : * @param __l std::initializer_list.
599 : */
600 : basic_string&
601 : operator=(initializer_list<_CharT> __l)
602 : {
603 : this->assign(__l.begin(), __l.size());
604 : return *this;
605 : }
606 : #endif // C++11
607 :
608 : // Iterators:
609 : /**
610 : * Returns a read/write iterator that points to the first character in
611 : * the %string. Unshares the string.
612 : */
613 : iterator
614 0 : begin() // FIXME C++11: should be noexcept.
615 : {
616 0 : _M_leak();
617 0 : return iterator(_M_data());
618 : }
619 :
620 : /**
621 : * Returns a read-only (constant) iterator that points to the first
622 : * character in the %string.
623 : */
624 : const_iterator
625 : begin() const _GLIBCXX_NOEXCEPT
626 : { return const_iterator(_M_data()); }
627 :
628 : /**
629 : * Returns a read/write iterator that points one past the last
630 : * character in the %string. Unshares the string.
631 : */
632 : iterator
633 0 : end() // FIXME C++11: should be noexcept.
634 : {
635 0 : _M_leak();
636 0 : return iterator(_M_data() + this->size());
637 : }
638 :
639 : /**
640 : * Returns a read-only (constant) iterator that points one past the
641 : * last character in the %string.
642 : */
643 : const_iterator
644 : end() const _GLIBCXX_NOEXCEPT
645 : { return const_iterator(_M_data() + this->size()); }
646 :
647 : /**
648 : * Returns a read/write reverse iterator that points to the last
649 : * character in the %string. Iteration is done in reverse element
650 : * order. Unshares the string.
651 : */
652 : reverse_iterator
653 : rbegin() // FIXME C++11: should be noexcept.
654 : { return reverse_iterator(this->end()); }
655 :
656 : /**
657 : * Returns a read-only (constant) reverse iterator that points
658 : * to the last character in the %string. Iteration is done in
659 : * reverse element order.
660 : */
661 : const_reverse_iterator
662 : rbegin() const _GLIBCXX_NOEXCEPT
663 : { return const_reverse_iterator(this->end()); }
664 :
665 : /**
666 : * Returns a read/write reverse iterator that points to one before the
667 : * first character in the %string. Iteration is done in reverse
668 : * element order. Unshares the string.
669 : */
670 : reverse_iterator
671 : rend() // FIXME C++11: should be noexcept.
672 : { return reverse_iterator(this->begin()); }
673 :
674 : /**
675 : * Returns a read-only (constant) reverse iterator that points
676 : * to one before the first character in the %string. Iteration
677 : * is done in reverse element order.
678 : */
679 : const_reverse_iterator
680 : rend() const _GLIBCXX_NOEXCEPT
681 : { return const_reverse_iterator(this->begin()); }
682 :
683 : #if __cplusplus >= 201103L
684 : /**
685 : * Returns a read-only (constant) iterator that points to the first
686 : * character in the %string.
687 : */
688 : const_iterator
689 : cbegin() const noexcept
690 : { return const_iterator(this->_M_data()); }
691 :
692 : /**
693 : * Returns a read-only (constant) iterator that points one past the
694 : * last character in the %string.
695 : */
696 : const_iterator
697 : cend() const noexcept
698 : { return const_iterator(this->_M_data() + this->size()); }
699 :
700 : /**
701 : * Returns a read-only (constant) reverse iterator that points
702 : * to the last character in the %string. Iteration is done in
703 : * reverse element order.
704 : */
705 : const_reverse_iterator
706 : crbegin() const noexcept
707 : { return const_reverse_iterator(this->end()); }
708 :
709 : /**
710 : * Returns a read-only (constant) reverse iterator that points
711 : * to one before the first character in the %string. Iteration
712 : * is done in reverse element order.
713 : */
714 : const_reverse_iterator
715 : crend() const noexcept
716 : { return const_reverse_iterator(this->begin()); }
717 : #endif
718 :
719 : public:
720 : // Capacity:
721 : /// Returns the number of characters in the string, not including any
722 : /// null-termination.
723 : size_type
724 0 : size() const _GLIBCXX_NOEXCEPT
725 0 : { return _M_rep()->_M_length; }
726 :
727 : /// Returns the number of characters in the string, not including any
728 : /// null-termination.
729 : size_type
730 : length() const _GLIBCXX_NOEXCEPT
731 : { return _M_rep()->_M_length; }
732 :
733 : /// Returns the size() of the largest possible %string.
734 : size_type
735 : max_size() const _GLIBCXX_NOEXCEPT
736 : { return _Rep::_S_max_size; }
737 :
738 : /**
739 : * @brief Resizes the %string to the specified number of characters.
740 : * @param __n Number of characters the %string should contain.
741 : * @param __c Character to fill any new elements.
742 : *
743 : * This function will %resize the %string to the specified
744 : * number of characters. If the number is smaller than the
745 : * %string's current size the %string is truncated, otherwise
746 : * the %string is extended and new elements are %set to @a __c.
747 : */
748 : void
749 : resize(size_type __n, _CharT __c);
750 :
751 : /**
752 : * @brief Resizes the %string to the specified number of characters.
753 : * @param __n Number of characters the %string should contain.
754 : *
755 : * This function will resize the %string to the specified length. If
756 : * the new size is smaller than the %string's current size the %string
757 : * is truncated, otherwise the %string is extended and new characters
758 : * are default-constructed. For basic types such as char, this means
759 : * setting them to 0.
760 : */
761 : void
762 : resize(size_type __n)
763 : { this->resize(__n, _CharT()); }
764 :
765 : #if __cplusplus >= 201103L
766 : /// A non-binding request to reduce capacity() to size().
767 : void
768 : shrink_to_fit() _GLIBCXX_NOEXCEPT
769 : {
770 : if (capacity() > size())
771 : {
772 : __try
773 : { reserve(0); }
774 : __catch(...)
775 : { }
776 : }
777 : }
778 : #endif
779 :
780 : /**
781 : * Returns the total number of characters that the %string can hold
782 : * before needing to allocate more memory.
783 : */
784 : size_type
785 : capacity() const _GLIBCXX_NOEXCEPT
786 : { return _M_rep()->_M_capacity; }
787 :
788 : /**
789 : * @brief Attempt to preallocate enough memory for specified number of
790 : * characters.
791 : * @param __res_arg Number of characters required.
792 : * @throw std::length_error If @a __res_arg exceeds @c max_size().
793 : *
794 : * This function attempts to reserve enough memory for the
795 : * %string to hold the specified number of characters. If the
796 : * number requested is more than max_size(), length_error is
797 : * thrown.
798 : *
799 : * The advantage of this function is that if optimal code is a
800 : * necessity and the user can determine the string length that will be
801 : * required, the user can reserve the memory in %advance, and thus
802 : * prevent a possible reallocation of memory and copying of %string
803 : * data.
804 : */
805 : void
806 : reserve(size_type __res_arg = 0);
807 :
808 : /**
809 : * Erases the string, making it empty.
810 : */
811 : // PR 56166: this should not throw.
812 : void
813 : clear()
814 : { _M_mutate(0, this->size(), 0); }
815 :
816 : /**
817 : * Returns true if the %string is empty. Equivalent to
818 : * <code>*this == ""</code>.
819 : */
820 : bool
821 0 : empty() const _GLIBCXX_NOEXCEPT
822 0 : { return this->size() == 0; }
823 :
824 : // Element access:
825 : /**
826 : * @brief Subscript access to the data contained in the %string.
827 : * @param __pos The index of the character to access.
828 : * @return Read-only (constant) reference to the character.
829 : *
830 : * This operator allows for easy, array-style, data access.
831 : * Note that data access with this operator is unchecked and
832 : * out_of_range lookups are not defined. (For checked lookups
833 : * see at().)
834 : */
835 : const_reference
836 0 : operator[] (size_type __pos) const _GLIBCXX_NOEXCEPT
837 : {
838 : _GLIBCXX_DEBUG_ASSERT(__pos <= size());
839 0 : return _M_data()[__pos];
840 : }
841 :
842 : /**
843 : * @brief Subscript access to the data contained in the %string.
844 : * @param __pos The index of the character to access.
845 : * @return Read/write reference to the character.
846 : *
847 : * This operator allows for easy, array-style, data access.
848 : * Note that data access with this operator is unchecked and
849 : * out_of_range lookups are not defined. (For checked lookups
850 : * see at().) Unshares the string.
851 : */
852 : reference
853 : operator[](size_type __pos)
854 : {
855 : // Allow pos == size() both in C++98 mode, as v3 extension,
856 : // and in C++11 mode.
857 : _GLIBCXX_DEBUG_ASSERT(__pos <= size());
858 : // In pedantic mode be strict in C++98 mode.
859 : _GLIBCXX_DEBUG_PEDASSERT(__cplusplus >= 201103L || __pos < size());
860 : _M_leak();
861 : return _M_data()[__pos];
862 : }
863 :
864 : /**
865 : * @brief Provides access to the data contained in the %string.
866 : * @param __n The index of the character to access.
867 : * @return Read-only (const) reference to the character.
868 : * @throw std::out_of_range If @a n is an invalid index.
869 : *
870 : * This function provides for safer data access. The parameter is
871 : * first checked that it is in the range of the string. The function
872 : * throws out_of_range if the check fails.
873 : */
874 : const_reference
875 : at(size_type __n) const
876 : {
877 : if (__n >= this->size())
878 : __throw_out_of_range_fmt(__N("basic_string::at: __n "
879 : "(which is %zu) >= this->size() "
880 : "(which is %zu)"),
881 : __n, this->size());
882 : return _M_data()[__n];
883 : }
884 :
885 : /**
886 : * @brief Provides access to the data contained in the %string.
887 : * @param __n The index of the character to access.
888 : * @return Read/write reference to the character.
889 : * @throw std::out_of_range If @a n is an invalid index.
890 : *
891 : * This function provides for safer data access. The parameter is
892 : * first checked that it is in the range of the string. The function
893 : * throws out_of_range if the check fails. Success results in
894 : * unsharing the string.
895 : */
896 : reference
897 : at(size_type __n)
898 : {
899 : if (__n >= size())
900 : __throw_out_of_range_fmt(__N("basic_string::at: __n "
901 : "(which is %zu) >= this->size() "
902 : "(which is %zu)"),
903 : __n, this->size());
904 : _M_leak();
905 : return _M_data()[__n];
906 : }
907 :
908 : #if __cplusplus >= 201103L
909 : /**
910 : * Returns a read/write reference to the data at the first
911 : * element of the %string.
912 : */
913 : reference
914 : front()
915 : { return operator[](0); }
916 :
917 : /**
918 : * Returns a read-only (constant) reference to the data at the first
919 : * element of the %string.
920 : */
921 : const_reference
922 : front() const _GLIBCXX_NOEXCEPT
923 : { return operator[](0); }
924 :
925 : /**
926 : * Returns a read/write reference to the data at the last
927 : * element of the %string.
928 : */
929 : reference
930 : back()
931 : { return operator[](this->size() - 1); }
932 :
933 : /**
934 : * Returns a read-only (constant) reference to the data at the
935 : * last element of the %string.
936 : */
937 : const_reference
938 : back() const _GLIBCXX_NOEXCEPT
939 : { return operator[](this->size() - 1); }
940 : #endif
941 :
942 : // Modifiers:
943 : /**
944 : * @brief Append a string to this string.
945 : * @param __str The string to append.
946 : * @return Reference to this string.
947 : */
948 : basic_string&
949 : operator+=(const basic_string& __str)
950 : { return this->append(__str); }
951 :
952 : /**
953 : * @brief Append a C string.
954 : * @param __s The C string to append.
955 : * @return Reference to this string.
956 : */
957 : basic_string&
958 0 : operator+=(const _CharT* __s)
959 0 : { return this->append(__s); }
960 :
961 : /**
962 : * @brief Append a character.
963 : * @param __c The character to append.
964 : * @return Reference to this string.
965 : */
966 : basic_string&
967 : operator+=(_CharT __c)
968 : {
969 : this->push_back(__c);
970 : return *this;
971 : }
972 :
973 : #if __cplusplus >= 201103L
974 : /**
975 : * @brief Append an initializer_list of characters.
976 : * @param __l The initializer_list of characters to be appended.
977 : * @return Reference to this string.
978 : */
979 : basic_string&
980 : operator+=(initializer_list<_CharT> __l)
981 : { return this->append(__l.begin(), __l.size()); }
982 : #endif // C++11
983 :
984 : /**
985 : * @brief Append a string to this string.
986 : * @param __str The string to append.
987 : * @return Reference to this string.
988 : */
989 : basic_string&
990 : append(const basic_string& __str);
991 :
992 : /**
993 : * @brief Append a substring.
994 : * @param __str The string to append.
995 : * @param __pos Index of the first character of str to append.
996 : * @param __n The number of characters to append.
997 : * @return Reference to this string.
998 : * @throw std::out_of_range if @a __pos is not a valid index.
999 : *
1000 : * This function appends @a __n characters from @a __str
1001 : * starting at @a __pos to this string. If @a __n is is larger
1002 : * than the number of available characters in @a __str, the
1003 : * remainder of @a __str is appended.
1004 : */
1005 : basic_string&
1006 : append(const basic_string& __str, size_type __pos, size_type __n);
1007 :
1008 : /**
1009 : * @brief Append a C substring.
1010 : * @param __s The C string to append.
1011 : * @param __n The number of characters to append.
1012 : * @return Reference to this string.
1013 : */
1014 : basic_string&
1015 : append(const _CharT* __s, size_type __n);
1016 :
1017 : /**
1018 : * @brief Append a C string.
1019 : * @param __s The C string to append.
1020 : * @return Reference to this string.
1021 : */
1022 : basic_string&
1023 0 : append(const _CharT* __s)
1024 : {
1025 : __glibcxx_requires_string(__s);
1026 0 : return this->append(__s, traits_type::length(__s));
1027 : }
1028 :
1029 : /**
1030 : * @brief Append multiple characters.
1031 : * @param __n The number of characters to append.
1032 : * @param __c The character to use.
1033 : * @return Reference to this string.
1034 : *
1035 : * Appends __n copies of __c to this string.
1036 : */
1037 : basic_string&
1038 : append(size_type __n, _CharT __c);
1039 :
1040 : #if __cplusplus >= 201103L
1041 : /**
1042 : * @brief Append an initializer_list of characters.
1043 : * @param __l The initializer_list of characters to append.
1044 : * @return Reference to this string.
1045 : */
1046 : basic_string&
1047 : append(initializer_list<_CharT> __l)
1048 : { return this->append(__l.begin(), __l.size()); }
1049 : #endif // C++11
1050 :
1051 : /**
1052 : * @brief Append a range of characters.
1053 : * @param __first Iterator referencing the first character to append.
1054 : * @param __last Iterator marking the end of the range.
1055 : * @return Reference to this string.
1056 : *
1057 : * Appends characters in the range [__first,__last) to this string.
1058 : */
1059 : template<class _InputIterator>
1060 : basic_string&
1061 : append(_InputIterator __first, _InputIterator __last)
1062 : { return this->replace(_M_iend(), _M_iend(), __first, __last); }
1063 :
1064 : /**
1065 : * @brief Append a single character.
1066 : * @param __c Character to append.
1067 : */
1068 : void
1069 : push_back(_CharT __c)
1070 : {
1071 : const size_type __len = 1 + this->size();
1072 : if (__len > this->capacity() || _M_rep()->_M_is_shared())
1073 : this->reserve(__len);
1074 : traits_type::assign(_M_data()[this->size()], __c);
1075 : _M_rep()->_M_set_length_and_sharable(__len);
1076 : }
1077 :
1078 : /**
1079 : * @brief Set value to contents of another string.
1080 : * @param __str Source string to use.
1081 : * @return Reference to this string.
1082 : */
1083 : basic_string&
1084 : assign(const basic_string& __str);
1085 :
1086 : #if __cplusplus >= 201103L
1087 : /**
1088 : * @brief Set value to contents of another string.
1089 : * @param __str Source string to use.
1090 : * @return Reference to this string.
1091 : *
1092 : * This function sets this string to the exact contents of @a __str.
1093 : * @a __str is a valid, but unspecified string.
1094 : */
1095 : // PR 58265, this should be noexcept.
1096 : basic_string&
1097 : assign(basic_string&& __str)
1098 : {
1099 : this->swap(__str);
1100 : return *this;
1101 : }
1102 : #endif // C++11
1103 :
1104 : /**
1105 : * @brief Set value to a substring of a string.
1106 : * @param __str The string to use.
1107 : * @param __pos Index of the first character of str.
1108 : * @param __n Number of characters to use.
1109 : * @return Reference to this string.
1110 : * @throw std::out_of_range if @a pos is not a valid index.
1111 : *
1112 : * This function sets this string to the substring of @a __str
1113 : * consisting of @a __n characters at @a __pos. If @a __n is
1114 : * is larger than the number of available characters in @a
1115 : * __str, the remainder of @a __str is used.
1116 : */
1117 : basic_string&
1118 : assign(const basic_string& __str, size_type __pos, size_type __n)
1119 : { return this->assign(__str._M_data()
1120 : + __str._M_check(__pos, "basic_string::assign"),
1121 : __str._M_limit(__pos, __n)); }
1122 :
1123 : /**
1124 : * @brief Set value to a C substring.
1125 : * @param __s The C string to use.
1126 : * @param __n Number of characters to use.
1127 : * @return Reference to this string.
1128 : *
1129 : * This function sets the value of this string to the first @a __n
1130 : * characters of @a __s. If @a __n is is larger than the number of
1131 : * available characters in @a __s, the remainder of @a __s is used.
1132 : */
1133 : basic_string&
1134 : assign(const _CharT* __s, size_type __n);
1135 :
1136 : /**
1137 : * @brief Set value to contents of a C string.
1138 : * @param __s The C string to use.
1139 : * @return Reference to this string.
1140 : *
1141 : * This function sets the value of this string to the value of @a __s.
1142 : * The data is copied, so there is no dependence on @a __s once the
1143 : * function returns.
1144 : */
1145 : basic_string&
1146 0 : assign(const _CharT* __s)
1147 : {
1148 : __glibcxx_requires_string(__s);
1149 0 : return this->assign(__s, traits_type::length(__s));
1150 : }
1151 :
1152 : /**
1153 : * @brief Set value to multiple characters.
1154 : * @param __n Length of the resulting string.
1155 : * @param __c The character to use.
1156 : * @return Reference to this string.
1157 : *
1158 : * This function sets the value of this string to @a __n copies of
1159 : * character @a __c.
1160 : */
1161 : basic_string&
1162 : assign(size_type __n, _CharT __c)
1163 : { return _M_replace_aux(size_type(0), this->size(), __n, __c); }
1164 :
1165 : /**
1166 : * @brief Set value to a range of characters.
1167 : * @param __first Iterator referencing the first character to append.
1168 : * @param __last Iterator marking the end of the range.
1169 : * @return Reference to this string.
1170 : *
1171 : * Sets value of string to characters in the range [__first,__last).
1172 : */
1173 : template<class _InputIterator>
1174 : basic_string&
1175 : assign(_InputIterator __first, _InputIterator __last)
1176 : { return this->replace(_M_ibegin(), _M_iend(), __first, __last); }
1177 :
1178 : #if __cplusplus >= 201103L
1179 : /**
1180 : * @brief Set value to an initializer_list of characters.
1181 : * @param __l The initializer_list of characters to assign.
1182 : * @return Reference to this string.
1183 : */
1184 : basic_string&
1185 : assign(initializer_list<_CharT> __l)
1186 : { return this->assign(__l.begin(), __l.size()); }
1187 : #endif // C++11
1188 :
1189 : /**
1190 : * @brief Insert multiple characters.
1191 : * @param __p Iterator referencing location in string to insert at.
1192 : * @param __n Number of characters to insert
1193 : * @param __c The character to insert.
1194 : * @throw std::length_error If new length exceeds @c max_size().
1195 : *
1196 : * Inserts @a __n copies of character @a __c starting at the
1197 : * position referenced by iterator @a __p. If adding
1198 : * characters causes the length to exceed max_size(),
1199 : * length_error is thrown. The value of the string doesn't
1200 : * change if an error is thrown.
1201 : */
1202 : void
1203 : insert(iterator __p, size_type __n, _CharT __c)
1204 : { this->replace(__p, __p, __n, __c); }
1205 :
1206 : /**
1207 : * @brief Insert a range of characters.
1208 : * @param __p Iterator referencing location in string to insert at.
1209 : * @param __beg Start of range.
1210 : * @param __end End of range.
1211 : * @throw std::length_error If new length exceeds @c max_size().
1212 : *
1213 : * Inserts characters in range [__beg,__end). If adding
1214 : * characters causes the length to exceed max_size(),
1215 : * length_error is thrown. The value of the string doesn't
1216 : * change if an error is thrown.
1217 : */
1218 : template<class _InputIterator>
1219 : void
1220 : insert(iterator __p, _InputIterator __beg, _InputIterator __end)
1221 : { this->replace(__p, __p, __beg, __end); }
1222 :
1223 : #if __cplusplus >= 201103L
1224 : /**
1225 : * @brief Insert an initializer_list of characters.
1226 : * @param __p Iterator referencing location in string to insert at.
1227 : * @param __l The initializer_list of characters to insert.
1228 : * @throw std::length_error If new length exceeds @c max_size().
1229 : */
1230 : void
1231 : insert(iterator __p, initializer_list<_CharT> __l)
1232 : {
1233 : _GLIBCXX_DEBUG_PEDASSERT(__p >= _M_ibegin() && __p <= _M_iend());
1234 : this->insert(__p - _M_ibegin(), __l.begin(), __l.size());
1235 : }
1236 : #endif // C++11
1237 :
1238 : /**
1239 : * @brief Insert value of a string.
1240 : * @param __pos1 Iterator referencing location in string to insert at.
1241 : * @param __str The string to insert.
1242 : * @return Reference to this string.
1243 : * @throw std::length_error If new length exceeds @c max_size().
1244 : *
1245 : * Inserts value of @a __str starting at @a __pos1. If adding
1246 : * characters causes the length to exceed max_size(),
1247 : * length_error is thrown. The value of the string doesn't
1248 : * change if an error is thrown.
1249 : */
1250 : basic_string&
1251 : insert(size_type __pos1, const basic_string& __str)
1252 : { return this->insert(__pos1, __str, size_type(0), __str.size()); }
1253 :
1254 : /**
1255 : * @brief Insert a substring.
1256 : * @param __pos1 Iterator referencing location in string to insert at.
1257 : * @param __str The string to insert.
1258 : * @param __pos2 Start of characters in str to insert.
1259 : * @param __n Number of characters to insert.
1260 : * @return Reference to this string.
1261 : * @throw std::length_error If new length exceeds @c max_size().
1262 : * @throw std::out_of_range If @a pos1 > size() or
1263 : * @a __pos2 > @a str.size().
1264 : *
1265 : * Starting at @a pos1, insert @a __n character of @a __str
1266 : * beginning with @a __pos2. If adding characters causes the
1267 : * length to exceed max_size(), length_error is thrown. If @a
1268 : * __pos1 is beyond the end of this string or @a __pos2 is
1269 : * beyond the end of @a __str, out_of_range is thrown. The
1270 : * value of the string doesn't change if an error is thrown.
1271 : */
1272 : basic_string&
1273 : insert(size_type __pos1, const basic_string& __str,
1274 : size_type __pos2, size_type __n)
1275 : { return this->insert(__pos1, __str._M_data()
1276 : + __str._M_check(__pos2, "basic_string::insert"),
1277 : __str._M_limit(__pos2, __n)); }
1278 :
1279 : /**
1280 : * @brief Insert a C substring.
1281 : * @param __pos Iterator referencing location in string to insert at.
1282 : * @param __s The C string to insert.
1283 : * @param __n The number of characters 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
1290 : * __pos. If adding characters causes the length to exceed
1291 : * max_size(), length_error is thrown. If @a __pos is beyond
1292 : * end(), out_of_range is thrown. The value of the string
1293 : * doesn't change if an error is thrown.
1294 : */
1295 : basic_string&
1296 : insert(size_type __pos, const _CharT* __s, size_type __n);
1297 :
1298 : /**
1299 : * @brief Insert a C string.
1300 : * @param __pos Iterator referencing location in string to insert at.
1301 : * @param __s The C string to insert.
1302 : * @return Reference to this string.
1303 : * @throw std::length_error If new length exceeds @c max_size().
1304 : * @throw std::out_of_range If @a pos is beyond the end of this
1305 : * string.
1306 : *
1307 : * Inserts the first @a n characters of @a __s starting at @a __pos. If
1308 : * adding characters causes the length to exceed max_size(),
1309 : * length_error is thrown. If @a __pos is beyond end(), out_of_range is
1310 : * thrown. The value of the string doesn't change if an error is
1311 : * thrown.
1312 : */
1313 : basic_string&
1314 : insert(size_type __pos, const _CharT* __s)
1315 : {
1316 : __glibcxx_requires_string(__s);
1317 : return this->insert(__pos, __s, traits_type::length(__s));
1318 : }
1319 :
1320 : /**
1321 : * @brief Insert multiple characters.
1322 : * @param __pos Index in string to insert at.
1323 : * @param __n Number of characters to insert
1324 : * @param __c The character to insert.
1325 : * @return Reference to this string.
1326 : * @throw std::length_error If new length exceeds @c max_size().
1327 : * @throw std::out_of_range If @a __pos is beyond the end of this
1328 : * string.
1329 : *
1330 : * Inserts @a __n copies of character @a __c starting at index
1331 : * @a __pos. If adding characters causes the length to exceed
1332 : * max_size(), length_error is thrown. If @a __pos > length(),
1333 : * out_of_range is thrown. The value of the string doesn't
1334 : * change if an error is thrown.
1335 : */
1336 : basic_string&
1337 : insert(size_type __pos, size_type __n, _CharT __c)
1338 : { return _M_replace_aux(_M_check(__pos, "basic_string::insert"),
1339 : size_type(0), __n, __c); }
1340 :
1341 : /**
1342 : * @brief Insert one character.
1343 : * @param __p Iterator referencing position in string to insert at.
1344 : * @param __c The character to insert.
1345 : * @return Iterator referencing newly inserted char.
1346 : * @throw std::length_error If new length exceeds @c max_size().
1347 : *
1348 : * Inserts character @a __c at position referenced by @a __p.
1349 : * If adding character causes the length to exceed max_size(),
1350 : * length_error is thrown. If @a __p is beyond end of string,
1351 : * out_of_range is thrown. The value of the string doesn't
1352 : * change if an error is thrown.
1353 : */
1354 : iterator
1355 : insert(iterator __p, _CharT __c)
1356 : {
1357 : _GLIBCXX_DEBUG_PEDASSERT(__p >= _M_ibegin() && __p <= _M_iend());
1358 : const size_type __pos = __p - _M_ibegin();
1359 : _M_replace_aux(__pos, size_type(0), size_type(1), __c);
1360 : _M_rep()->_M_set_leaked();
1361 : return iterator(_M_data() + __pos);
1362 : }
1363 :
1364 : /**
1365 : * @brief Remove characters.
1366 : * @param __pos Index of first character to remove (default 0).
1367 : * @param __n Number of characters to remove (default remainder).
1368 : * @return Reference to this string.
1369 : * @throw std::out_of_range If @a pos is beyond the end of this
1370 : * string.
1371 : *
1372 : * Removes @a __n characters from this string starting at @a
1373 : * __pos. The length of the string is reduced by @a __n. If
1374 : * there are < @a __n characters to remove, the remainder of
1375 : * the string is truncated. If @a __p is beyond end of string,
1376 : * out_of_range is thrown. The value of the string doesn't
1377 : * change if an error is thrown.
1378 : */
1379 : basic_string&
1380 : erase(size_type __pos = 0, size_type __n = npos)
1381 : {
1382 : _M_mutate(_M_check(__pos, "basic_string::erase"),
1383 : _M_limit(__pos, __n), size_type(0));
1384 : return *this;
1385 : }
1386 :
1387 : /**
1388 : * @brief Remove one character.
1389 : * @param __position Iterator referencing the character to remove.
1390 : * @return iterator referencing same location after removal.
1391 : *
1392 : * Removes the character at @a __position from this string. The value
1393 : * of the string doesn't change if an error is thrown.
1394 : */
1395 : iterator
1396 : erase(iterator __position)
1397 : {
1398 : _GLIBCXX_DEBUG_PEDASSERT(__position >= _M_ibegin()
1399 : && __position < _M_iend());
1400 : const size_type __pos = __position - _M_ibegin();
1401 : _M_mutate(__pos, size_type(1), size_type(0));
1402 : _M_rep()->_M_set_leaked();
1403 : return iterator(_M_data() + __pos);
1404 : }
1405 :
1406 : /**
1407 : * @brief Remove a range of characters.
1408 : * @param __first Iterator referencing the first character to remove.
1409 : * @param __last Iterator referencing the end of the range.
1410 : * @return Iterator referencing location of first after removal.
1411 : *
1412 : * Removes the characters in the range [first,last) from this string.
1413 : * The value of the string doesn't change if an error is thrown.
1414 : */
1415 : iterator
1416 : erase(iterator __first, iterator __last);
1417 :
1418 : #if __cplusplus >= 201103L
1419 : /**
1420 : * @brief Remove the last character.
1421 : *
1422 : * The string must be non-empty.
1423 : */
1424 : void
1425 : pop_back() // FIXME C++11: should be noexcept.
1426 : { erase(size()-1, 1); }
1427 : #endif // C++11
1428 :
1429 : /**
1430 : * @brief Replace characters with value from another string.
1431 : * @param __pos Index of first character to replace.
1432 : * @param __n Number of characters to be replaced.
1433 : * @param __str String to insert.
1434 : * @return Reference to this string.
1435 : * @throw std::out_of_range If @a pos is beyond the end of this
1436 : * string.
1437 : * @throw std::length_error If new length exceeds @c max_size().
1438 : *
1439 : * Removes the characters in the range [__pos,__pos+__n) from
1440 : * this string. In place, the value of @a __str is inserted.
1441 : * If @a __pos is beyond end of string, out_of_range is thrown.
1442 : * If the length of the result exceeds max_size(), length_error
1443 : * is thrown. The value of the string doesn't change if an
1444 : * error is thrown.
1445 : */
1446 : basic_string&
1447 : replace(size_type __pos, size_type __n, const basic_string& __str)
1448 : { return this->replace(__pos, __n, __str._M_data(), __str.size()); }
1449 :
1450 : /**
1451 : * @brief Replace characters with value from another string.
1452 : * @param __pos1 Index of first character to replace.
1453 : * @param __n1 Number of characters to be replaced.
1454 : * @param __str String to insert.
1455 : * @param __pos2 Index of first character of str to use.
1456 : * @param __n2 Number of characters from str to use.
1457 : * @return Reference to this string.
1458 : * @throw std::out_of_range If @a __pos1 > size() or @a __pos2 >
1459 : * __str.size().
1460 : * @throw std::length_error If new length exceeds @c max_size().
1461 : *
1462 : * Removes the characters in the range [__pos1,__pos1 + n) from this
1463 : * string. In place, the value of @a __str is inserted. If @a __pos is
1464 : * beyond end of string, out_of_range is thrown. If the length of the
1465 : * result exceeds max_size(), length_error is thrown. The value of the
1466 : * string doesn't change if an error is thrown.
1467 : */
1468 : basic_string&
1469 : replace(size_type __pos1, size_type __n1, const basic_string& __str,
1470 : size_type __pos2, size_type __n2)
1471 : { return this->replace(__pos1, __n1, __str._M_data()
1472 : + __str._M_check(__pos2, "basic_string::replace"),
1473 : __str._M_limit(__pos2, __n2)); }
1474 :
1475 : /**
1476 : * @brief Replace characters with value of a C substring.
1477 : * @param __pos Index of first character to replace.
1478 : * @param __n1 Number of characters to be replaced.
1479 : * @param __s C string to insert.
1480 : * @param __n2 Number of characters from @a s to use.
1481 : * @return Reference to this string.
1482 : * @throw std::out_of_range If @a pos1 > size().
1483 : * @throw std::length_error If new length exceeds @c max_size().
1484 : *
1485 : * Removes the characters in the range [__pos,__pos + __n1)
1486 : * from this string. In place, the first @a __n2 characters of
1487 : * @a __s are inserted, or all of @a __s if @a __n2 is too large. If
1488 : * @a __pos is beyond end of string, out_of_range is thrown. If
1489 : * the length of result exceeds max_size(), length_error is
1490 : * thrown. The value of the string doesn't change if an error
1491 : * is thrown.
1492 : */
1493 : basic_string&
1494 : replace(size_type __pos, size_type __n1, const _CharT* __s,
1495 : size_type __n2);
1496 :
1497 : /**
1498 : * @brief Replace characters with value of a C string.
1499 : * @param __pos Index of first character to replace.
1500 : * @param __n1 Number of characters to be replaced.
1501 : * @param __s C string to insert.
1502 : * @return Reference to this string.
1503 : * @throw std::out_of_range If @a pos > size().
1504 : * @throw std::length_error If new length exceeds @c max_size().
1505 : *
1506 : * Removes the characters in the range [__pos,__pos + __n1)
1507 : * from this string. In place, the characters of @a __s are
1508 : * inserted. If @a __pos is beyond end of string, out_of_range
1509 : * is thrown. If the length of result exceeds max_size(),
1510 : * length_error is thrown. The value of the string doesn't
1511 : * change if an error is thrown.
1512 : */
1513 : basic_string&
1514 : replace(size_type __pos, size_type __n1, const _CharT* __s)
1515 : {
1516 : __glibcxx_requires_string(__s);
1517 : return this->replace(__pos, __n1, __s, traits_type::length(__s));
1518 : }
1519 :
1520 : /**
1521 : * @brief Replace characters with multiple characters.
1522 : * @param __pos Index of first character to replace.
1523 : * @param __n1 Number of characters to be replaced.
1524 : * @param __n2 Number of characters to insert.
1525 : * @param __c Character to insert.
1526 : * @return Reference to this string.
1527 : * @throw std::out_of_range If @a __pos > size().
1528 : * @throw std::length_error If new length exceeds @c max_size().
1529 : *
1530 : * Removes the characters in the range [pos,pos + n1) from this
1531 : * string. In place, @a __n2 copies of @a __c are inserted.
1532 : * If @a __pos is beyond end of string, out_of_range is thrown.
1533 : * If the length of result exceeds max_size(), length_error is
1534 : * thrown. The value of the string doesn't change if an error
1535 : * is thrown.
1536 : */
1537 : basic_string&
1538 : replace(size_type __pos, size_type __n1, size_type __n2, _CharT __c)
1539 : { return _M_replace_aux(_M_check(__pos, "basic_string::replace"),
1540 : _M_limit(__pos, __n1), __n2, __c); }
1541 :
1542 : /**
1543 : * @brief Replace range of characters with string.
1544 : * @param __i1 Iterator referencing start of range to replace.
1545 : * @param __i2 Iterator referencing end of range to replace.
1546 : * @param __str String value 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 value of @a __str is inserted. If the length of result
1552 : * exceeds max_size(), length_error is thrown. The value of
1553 : * the string doesn't change if an error is thrown.
1554 : */
1555 : basic_string&
1556 : replace(iterator __i1, iterator __i2, const basic_string& __str)
1557 : { return this->replace(__i1, __i2, __str._M_data(), __str.size()); }
1558 :
1559 : /**
1560 : * @brief Replace range of characters with C substring.
1561 : * @param __i1 Iterator referencing start of range to replace.
1562 : * @param __i2 Iterator referencing end of range to replace.
1563 : * @param __s C string value to insert.
1564 : * @param __n Number of characters from s to insert.
1565 : * @return Reference to this string.
1566 : * @throw std::length_error If new length exceeds @c max_size().
1567 : *
1568 : * Removes the characters in the range [__i1,__i2). In place,
1569 : * the first @a __n characters of @a __s are inserted. If the
1570 : * length of result exceeds max_size(), length_error is thrown.
1571 : * The value of the string doesn't change if an error is
1572 : * thrown.
1573 : */
1574 : basic_string&
1575 : replace(iterator __i1, iterator __i2, const _CharT* __s, size_type __n)
1576 : {
1577 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
1578 : && __i2 <= _M_iend());
1579 : return this->replace(__i1 - _M_ibegin(), __i2 - __i1, __s, __n);
1580 : }
1581 :
1582 : /**
1583 : * @brief Replace range of characters with C string.
1584 : * @param __i1 Iterator referencing start of range to replace.
1585 : * @param __i2 Iterator referencing end of range to replace.
1586 : * @param __s C string value to insert.
1587 : * @return Reference to this string.
1588 : * @throw std::length_error If new length exceeds @c max_size().
1589 : *
1590 : * Removes the characters in the range [__i1,__i2). In place,
1591 : * the characters of @a __s are inserted. If the length of
1592 : * result exceeds max_size(), length_error is thrown. The
1593 : * value of the string doesn't change if an error is thrown.
1594 : */
1595 : basic_string&
1596 : replace(iterator __i1, iterator __i2, const _CharT* __s)
1597 : {
1598 : __glibcxx_requires_string(__s);
1599 : return this->replace(__i1, __i2, __s, traits_type::length(__s));
1600 : }
1601 :
1602 : /**
1603 : * @brief Replace range of characters with multiple characters
1604 : * @param __i1 Iterator referencing start of range to replace.
1605 : * @param __i2 Iterator referencing end of range to replace.
1606 : * @param __n Number of characters to insert.
1607 : * @param __c Character to insert.
1608 : * @return Reference to this string.
1609 : * @throw std::length_error If new length exceeds @c max_size().
1610 : *
1611 : * Removes the characters in the range [__i1,__i2). In place,
1612 : * @a __n copies of @a __c are inserted. If the length of
1613 : * result exceeds max_size(), length_error is thrown. The
1614 : * value of the string doesn't change if an error is thrown.
1615 : */
1616 : basic_string&
1617 : replace(iterator __i1, iterator __i2, size_type __n, _CharT __c)
1618 : {
1619 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
1620 : && __i2 <= _M_iend());
1621 : return _M_replace_aux(__i1 - _M_ibegin(), __i2 - __i1, __n, __c);
1622 : }
1623 :
1624 : /**
1625 : * @brief Replace range of characters with range.
1626 : * @param __i1 Iterator referencing start of range to replace.
1627 : * @param __i2 Iterator referencing end of range to replace.
1628 : * @param __k1 Iterator referencing start of range to insert.
1629 : * @param __k2 Iterator referencing end of range to insert.
1630 : * @return Reference to this string.
1631 : * @throw std::length_error If new length exceeds @c max_size().
1632 : *
1633 : * Removes the characters in the range [__i1,__i2). In place,
1634 : * characters in the range [__k1,__k2) are inserted. If the
1635 : * length of result exceeds max_size(), length_error is thrown.
1636 : * The value of the string doesn't change if an error is
1637 : * thrown.
1638 : */
1639 : template<class _InputIterator>
1640 : basic_string&
1641 : replace(iterator __i1, iterator __i2,
1642 : _InputIterator __k1, _InputIterator __k2)
1643 : {
1644 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
1645 : && __i2 <= _M_iend());
1646 : __glibcxx_requires_valid_range(__k1, __k2);
1647 : typedef typename std::__is_integer<_InputIterator>::__type _Integral;
1648 : return _M_replace_dispatch(__i1, __i2, __k1, __k2, _Integral());
1649 : }
1650 :
1651 : // Specializations for the common case of pointer and iterator:
1652 : // useful to avoid the overhead of temporary buffering in _M_replace.
1653 : basic_string&
1654 : replace(iterator __i1, iterator __i2, _CharT* __k1, _CharT* __k2)
1655 : {
1656 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
1657 : && __i2 <= _M_iend());
1658 : __glibcxx_requires_valid_range(__k1, __k2);
1659 : return this->replace(__i1 - _M_ibegin(), __i2 - __i1,
1660 : __k1, __k2 - __k1);
1661 : }
1662 :
1663 : basic_string&
1664 : replace(iterator __i1, iterator __i2,
1665 : const _CharT* __k1, const _CharT* __k2)
1666 : {
1667 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
1668 : && __i2 <= _M_iend());
1669 : __glibcxx_requires_valid_range(__k1, __k2);
1670 : return this->replace(__i1 - _M_ibegin(), __i2 - __i1,
1671 : __k1, __k2 - __k1);
1672 : }
1673 :
1674 : basic_string&
1675 : replace(iterator __i1, iterator __i2, iterator __k1, iterator __k2)
1676 : {
1677 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
1678 : && __i2 <= _M_iend());
1679 : __glibcxx_requires_valid_range(__k1, __k2);
1680 : return this->replace(__i1 - _M_ibegin(), __i2 - __i1,
1681 : __k1.base(), __k2 - __k1);
1682 : }
1683 :
1684 : basic_string&
1685 : replace(iterator __i1, iterator __i2,
1686 : const_iterator __k1, const_iterator __k2)
1687 : {
1688 : _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
1689 : && __i2 <= _M_iend());
1690 : __glibcxx_requires_valid_range(__k1, __k2);
1691 : return this->replace(__i1 - _M_ibegin(), __i2 - __i1,
1692 : __k1.base(), __k2 - __k1);
1693 : }
1694 :
1695 : #if __cplusplus >= 201103L
1696 : /**
1697 : * @brief Replace range of characters with initializer_list.
1698 : * @param __i1 Iterator referencing start of range to replace.
1699 : * @param __i2 Iterator referencing end of range to replace.
1700 : * @param __l The initializer_list of characters to insert.
1701 : * @return Reference to this string.
1702 : * @throw std::length_error If new length exceeds @c max_size().
1703 : *
1704 : * Removes the characters in the range [__i1,__i2). In place,
1705 : * characters in the range [__k1,__k2) are inserted. If the
1706 : * length of result exceeds max_size(), length_error is thrown.
1707 : * The value of the string doesn't change if an error is
1708 : * thrown.
1709 : */
1710 : basic_string& replace(iterator __i1, iterator __i2,
1711 : initializer_list<_CharT> __l)
1712 : { return this->replace(__i1, __i2, __l.begin(), __l.end()); }
1713 : #endif // C++11
1714 :
1715 : private:
1716 : template<class _Integer>
1717 : basic_string&
1718 : _M_replace_dispatch(iterator __i1, iterator __i2, _Integer __n,
1719 : _Integer __val, __true_type)
1720 : { return _M_replace_aux(__i1 - _M_ibegin(), __i2 - __i1, __n, __val); }
1721 :
1722 : template<class _InputIterator>
1723 : basic_string&
1724 : _M_replace_dispatch(iterator __i1, iterator __i2, _InputIterator __k1,
1725 : _InputIterator __k2, __false_type);
1726 :
1727 : basic_string&
1728 : _M_replace_aux(size_type __pos1, size_type __n1, size_type __n2,
1729 : _CharT __c);
1730 :
1731 : basic_string&
1732 : _M_replace_safe(size_type __pos1, size_type __n1, const _CharT* __s,
1733 : size_type __n2);
1734 :
1735 : // _S_construct_aux is used to implement the 21.3.1 para 15 which
1736 : // requires special behaviour if _InIter is an integral type
1737 : template<class _InIterator>
1738 : static _CharT*
1739 67 : _S_construct_aux(_InIterator __beg, _InIterator __end,
1740 : const _Alloc& __a, __false_type)
1741 : {
1742 : typedef typename iterator_traits<_InIterator>::iterator_category _Tag;
1743 67 : return _S_construct(__beg, __end, __a, _Tag());
1744 : }
1745 :
1746 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
1747 : // 438. Ambiguity in the "do the right thing" clause
1748 : template<class _Integer>
1749 : static _CharT*
1750 : _S_construct_aux(_Integer __beg, _Integer __end,
1751 : const _Alloc& __a, __true_type)
1752 : { return _S_construct_aux_2(static_cast<size_type>(__beg),
1753 : __end, __a); }
1754 :
1755 : static _CharT*
1756 : _S_construct_aux_2(size_type __req, _CharT __c, const _Alloc& __a)
1757 : { return _S_construct(__req, __c, __a); }
1758 :
1759 : template<class _InIterator>
1760 : static _CharT*
1761 67 : _S_construct(_InIterator __beg, _InIterator __end, const _Alloc& __a)
1762 : {
1763 : typedef typename std::__is_integer<_InIterator>::__type _Integral;
1764 67 : return _S_construct_aux(__beg, __end, __a, _Integral());
1765 : }
1766 :
1767 : // For Input Iterators, used in istreambuf_iterators, etc.
1768 : template<class _InIterator>
1769 : static _CharT*
1770 : _S_construct(_InIterator __beg, _InIterator __end, const _Alloc& __a,
1771 : input_iterator_tag);
1772 :
1773 : // For forward_iterators up to random_access_iterators, used for
1774 : // string::iterator, _CharT*, etc.
1775 : template<class _FwdIterator>
1776 : static _CharT*
1777 : _S_construct(_FwdIterator __beg, _FwdIterator __end, const _Alloc& __a,
1778 : forward_iterator_tag);
1779 :
1780 : static _CharT*
1781 : _S_construct(size_type __req, _CharT __c, const _Alloc& __a);
1782 :
1783 : public:
1784 :
1785 : /**
1786 : * @brief Copy substring into C string.
1787 : * @param __s C string to copy value into.
1788 : * @param __n Number of characters to copy.
1789 : * @param __pos Index of first character to copy.
1790 : * @return Number of characters actually copied
1791 : * @throw std::out_of_range If __pos > size().
1792 : *
1793 : * Copies up to @a __n characters starting at @a __pos into the
1794 : * C string @a __s. If @a __pos is %greater than size(),
1795 : * out_of_range is thrown.
1796 : */
1797 : size_type
1798 : copy(_CharT* __s, size_type __n, size_type __pos = 0) const;
1799 :
1800 : /**
1801 : * @brief Swap contents with another string.
1802 : * @param __s String to swap with.
1803 : *
1804 : * Exchanges the contents of this string with that of @a __s in constant
1805 : * time.
1806 : */
1807 : // PR 58265, this should be noexcept.
1808 : void
1809 : swap(basic_string& __s);
1810 :
1811 : // String operations:
1812 : /**
1813 : * @brief Return const pointer to null-terminated contents.
1814 : *
1815 : * This is a handle to internal data. Do not modify or dire things may
1816 : * happen.
1817 : */
1818 : const _CharT*
1819 0 : c_str() const _GLIBCXX_NOEXCEPT
1820 0 : { return _M_data(); }
1821 :
1822 : /**
1823 : * @brief Return const pointer to contents.
1824 : *
1825 : * This is a handle to internal data. Do not modify or dire things may
1826 : * happen.
1827 : */
1828 : const _CharT*
1829 0 : data() const _GLIBCXX_NOEXCEPT
1830 0 : { return _M_data(); }
1831 :
1832 : /**
1833 : * @brief Return copy of allocator used to construct this string.
1834 : */
1835 : allocator_type
1836 0 : get_allocator() const _GLIBCXX_NOEXCEPT
1837 0 : { return _M_dataplus; }
1838 :
1839 : /**
1840 : * @brief Find position of a C substring.
1841 : * @param __s C string to locate.
1842 : * @param __pos Index of character to search from.
1843 : * @param __n Number of characters from @a s to search for.
1844 : * @return Index of start of first occurrence.
1845 : *
1846 : * Starting from @a __pos, searches forward for the first @a
1847 : * __n characters in @a __s within this string. If found,
1848 : * returns the index where it begins. If not found, returns
1849 : * npos.
1850 : */
1851 : size_type
1852 : find(const _CharT* __s, size_type __pos, size_type __n) const;
1853 :
1854 : /**
1855 : * @brief Find position of a string.
1856 : * @param __str String to locate.
1857 : * @param __pos Index of character to search from (default 0).
1858 : * @return Index of start of first occurrence.
1859 : *
1860 : * Starting from @a __pos, searches forward for value of @a __str within
1861 : * this string. If found, returns the index where it begins. If not
1862 : * found, returns npos.
1863 : */
1864 : size_type
1865 : find(const basic_string& __str, size_type __pos = 0) const
1866 : _GLIBCXX_NOEXCEPT
1867 : { return this->find(__str.data(), __pos, __str.size()); }
1868 :
1869 : /**
1870 : * @brief Find position of a C string.
1871 : * @param __s C string to locate.
1872 : * @param __pos Index of character to search from (default 0).
1873 : * @return Index of start of first occurrence.
1874 : *
1875 : * Starting from @a __pos, searches forward for the value of @a
1876 : * __s within this string. If found, returns the index where
1877 : * it begins. If not found, returns npos.
1878 : */
1879 : size_type
1880 : find(const _CharT* __s, size_type __pos = 0) const
1881 : {
1882 : __glibcxx_requires_string(__s);
1883 : return this->find(__s, __pos, traits_type::length(__s));
1884 : }
1885 :
1886 : /**
1887 : * @brief Find position of a character.
1888 : * @param __c Character to locate.
1889 : * @param __pos Index of character to search from (default 0).
1890 : * @return Index of first occurrence.
1891 : *
1892 : * Starting from @a __pos, searches forward for @a __c within
1893 : * this string. If found, returns the index where it was
1894 : * found. If not found, returns npos.
1895 : */
1896 : size_type
1897 : find(_CharT __c, size_type __pos = 0) const _GLIBCXX_NOEXCEPT;
1898 :
1899 : /**
1900 : * @brief Find last position of a string.
1901 : * @param __str String to locate.
1902 : * @param __pos Index of character to search back from (default end).
1903 : * @return Index of start of last occurrence.
1904 : *
1905 : * Starting from @a __pos, searches backward for value of @a
1906 : * __str within this string. If found, returns the index where
1907 : * it begins. If not found, returns npos.
1908 : */
1909 : size_type
1910 : rfind(const basic_string& __str, size_type __pos = npos) const
1911 : _GLIBCXX_NOEXCEPT
1912 : { return this->rfind(__str.data(), __pos, __str.size()); }
1913 :
1914 : /**
1915 : * @brief Find last position of a C substring.
1916 : * @param __s C string to locate.
1917 : * @param __pos Index of character to search back from.
1918 : * @param __n Number of characters from s to search for.
1919 : * @return Index of start of last occurrence.
1920 : *
1921 : * Starting from @a __pos, searches backward for the first @a
1922 : * __n characters in @a __s within this string. If found,
1923 : * returns the index where it begins. If not found, returns
1924 : * npos.
1925 : */
1926 : size_type
1927 : rfind(const _CharT* __s, size_type __pos, size_type __n) const;
1928 :
1929 : /**
1930 : * @brief Find last position of a C string.
1931 : * @param __s C string to locate.
1932 : * @param __pos Index of character to start search at (default end).
1933 : * @return Index of start of last occurrence.
1934 : *
1935 : * Starting from @a __pos, searches backward for the value of
1936 : * @a __s within this string. If found, returns the index
1937 : * where it begins. If not found, returns npos.
1938 : */
1939 : size_type
1940 : rfind(const _CharT* __s, size_type __pos = npos) const
1941 : {
1942 : __glibcxx_requires_string(__s);
1943 : return this->rfind(__s, __pos, traits_type::length(__s));
1944 : }
1945 :
1946 : /**
1947 : * @brief Find last position of a character.
1948 : * @param __c Character to locate.
1949 : * @param __pos Index of character to search back from (default end).
1950 : * @return Index of last occurrence.
1951 : *
1952 : * Starting from @a __pos, searches backward for @a __c within
1953 : * this string. If found, returns the index where it was
1954 : * found. If not found, returns npos.
1955 : */
1956 : size_type
1957 : rfind(_CharT __c, size_type __pos = npos) const _GLIBCXX_NOEXCEPT;
1958 :
1959 : /**
1960 : * @brief Find position of a character of string.
1961 : * @param __str String containing characters to locate.
1962 : * @param __pos Index of character to search from (default 0).
1963 : * @return Index of first occurrence.
1964 : *
1965 : * Starting from @a __pos, searches forward for one of the
1966 : * characters of @a __str within this string. If found,
1967 : * returns the index where it was found. If not found, returns
1968 : * npos.
1969 : */
1970 : size_type
1971 : find_first_of(const basic_string& __str, size_type __pos = 0) const
1972 : _GLIBCXX_NOEXCEPT
1973 : { return this->find_first_of(__str.data(), __pos, __str.size()); }
1974 :
1975 : /**
1976 : * @brief Find position of a character of C substring.
1977 : * @param __s String containing characters to locate.
1978 : * @param __pos Index of character to search from.
1979 : * @param __n Number of characters from s to search for.
1980 : * @return Index of first occurrence.
1981 : *
1982 : * Starting from @a __pos, searches forward for one of the
1983 : * first @a __n characters of @a __s within this string. If
1984 : * found, returns the index where it was found. If not found,
1985 : * returns npos.
1986 : */
1987 : size_type
1988 : find_first_of(const _CharT* __s, size_type __pos, size_type __n) const;
1989 :
1990 : /**
1991 : * @brief Find position of a character of C string.
1992 : * @param __s String containing characters to locate.
1993 : * @param __pos Index of character to search from (default 0).
1994 : * @return Index of first occurrence.
1995 : *
1996 : * Starting from @a __pos, searches forward for one of the
1997 : * characters of @a __s within this string. If found, returns
1998 : * the index where it was found. If not found, returns npos.
1999 : */
2000 : size_type
2001 : find_first_of(const _CharT* __s, size_type __pos = 0) const
2002 : {
2003 : __glibcxx_requires_string(__s);
2004 : return this->find_first_of(__s, __pos, traits_type::length(__s));
2005 : }
2006 :
2007 : /**
2008 : * @brief Find position of a character.
2009 : * @param __c Character to locate.
2010 : * @param __pos Index of character to search from (default 0).
2011 : * @return Index of first occurrence.
2012 : *
2013 : * Starting from @a __pos, searches forward for the character
2014 : * @a __c within this string. If found, returns the index
2015 : * where it was found. If not found, returns npos.
2016 : *
2017 : * Note: equivalent to find(__c, __pos).
2018 : */
2019 : size_type
2020 : find_first_of(_CharT __c, size_type __pos = 0) const _GLIBCXX_NOEXCEPT
2021 : { return this->find(__c, __pos); }
2022 :
2023 : /**
2024 : * @brief Find last position of a character of string.
2025 : * @param __str String containing characters to locate.
2026 : * @param __pos Index of character to search back from (default end).
2027 : * @return Index of last occurrence.
2028 : *
2029 : * Starting from @a __pos, searches backward for one of the
2030 : * characters of @a __str within this string. If found,
2031 : * returns the index where it was found. If not found, returns
2032 : * npos.
2033 : */
2034 : size_type
2035 : find_last_of(const basic_string& __str, size_type __pos = npos) const
2036 : _GLIBCXX_NOEXCEPT
2037 : { return this->find_last_of(__str.data(), __pos, __str.size()); }
2038 :
2039 : /**
2040 : * @brief Find last position of a character of C substring.
2041 : * @param __s C string containing characters to locate.
2042 : * @param __pos Index of character to search back from.
2043 : * @param __n Number of characters from s to search for.
2044 : * @return Index of last occurrence.
2045 : *
2046 : * Starting from @a __pos, searches backward for one of the
2047 : * first @a __n characters of @a __s within this string. If
2048 : * found, returns the index where it was found. If not found,
2049 : * returns npos.
2050 : */
2051 : size_type
2052 : find_last_of(const _CharT* __s, size_type __pos, size_type __n) const;
2053 :
2054 : /**
2055 : * @brief Find last position of a character of C string.
2056 : * @param __s C string containing characters to locate.
2057 : * @param __pos Index of character to search back from (default end).
2058 : * @return Index of last occurrence.
2059 : *
2060 : * Starting from @a __pos, searches backward for one of the
2061 : * characters of @a __s within this string. If found, returns
2062 : * the index where it was found. If not found, returns npos.
2063 : */
2064 : size_type
2065 : find_last_of(const _CharT* __s, size_type __pos = npos) const
2066 : {
2067 : __glibcxx_requires_string(__s);
2068 : return this->find_last_of(__s, __pos, traits_type::length(__s));
2069 : }
2070 :
2071 : /**
2072 : * @brief Find last position of a character.
2073 : * @param __c Character to locate.
2074 : * @param __pos Index of character to search back from (default end).
2075 : * @return Index of last occurrence.
2076 : *
2077 : * Starting from @a __pos, searches backward for @a __c within
2078 : * this string. If found, returns the index where it was
2079 : * found. If not found, returns npos.
2080 : *
2081 : * Note: equivalent to rfind(__c, __pos).
2082 : */
2083 : size_type
2084 : find_last_of(_CharT __c, size_type __pos = npos) const _GLIBCXX_NOEXCEPT
2085 : { return this->rfind(__c, __pos); }
2086 :
2087 : /**
2088 : * @brief Find position of a character not in string.
2089 : * @param __str String containing characters to avoid.
2090 : * @param __pos Index of character to search from (default 0).
2091 : * @return Index of first occurrence.
2092 : *
2093 : * Starting from @a __pos, searches forward for a character not contained
2094 : * in @a __str within this string. If found, returns the index where it
2095 : * was found. If not found, returns npos.
2096 : */
2097 : size_type
2098 : find_first_not_of(const basic_string& __str, size_type __pos = 0) const
2099 : _GLIBCXX_NOEXCEPT
2100 : { return this->find_first_not_of(__str.data(), __pos, __str.size()); }
2101 :
2102 : /**
2103 : * @brief Find position of a character not in C substring.
2104 : * @param __s C string containing characters to avoid.
2105 : * @param __pos Index of character to search from.
2106 : * @param __n Number of characters from __s to consider.
2107 : * @return Index of first occurrence.
2108 : *
2109 : * Starting from @a __pos, searches forward for a character not
2110 : * contained in the first @a __n characters of @a __s within
2111 : * this string. If found, returns the index where it was
2112 : * found. If not found, returns npos.
2113 : */
2114 : size_type
2115 : find_first_not_of(const _CharT* __s, size_type __pos,
2116 : size_type __n) const;
2117 :
2118 : /**
2119 : * @brief Find position of a character not in C string.
2120 : * @param __s C string containing characters to avoid.
2121 : * @param __pos Index of character to search from (default 0).
2122 : * @return Index of first occurrence.
2123 : *
2124 : * Starting from @a __pos, searches forward for a character not
2125 : * contained in @a __s within this string. If found, returns
2126 : * the index where it was found. If not found, returns npos.
2127 : */
2128 : size_type
2129 : find_first_not_of(const _CharT* __s, size_type __pos = 0) const
2130 : {
2131 : __glibcxx_requires_string(__s);
2132 : return this->find_first_not_of(__s, __pos, traits_type::length(__s));
2133 : }
2134 :
2135 : /**
2136 : * @brief Find position of a different character.
2137 : * @param __c Character to avoid.
2138 : * @param __pos Index of character to search from (default 0).
2139 : * @return Index of first occurrence.
2140 : *
2141 : * Starting from @a __pos, searches forward for a character
2142 : * other than @a __c within this string. If found, returns the
2143 : * index where it was found. If not found, returns npos.
2144 : */
2145 : size_type
2146 : find_first_not_of(_CharT __c, size_type __pos = 0) const
2147 : _GLIBCXX_NOEXCEPT;
2148 :
2149 : /**
2150 : * @brief Find last position of a character not in string.
2151 : * @param __str String containing characters to avoid.
2152 : * @param __pos Index of character to search back from (default end).
2153 : * @return Index of last occurrence.
2154 : *
2155 : * Starting from @a __pos, searches backward for a character
2156 : * not contained in @a __str within this string. If found,
2157 : * returns the index where it was found. If not found, returns
2158 : * npos.
2159 : */
2160 : size_type
2161 : find_last_not_of(const basic_string& __str, size_type __pos = npos) const
2162 : _GLIBCXX_NOEXCEPT
2163 : { return this->find_last_not_of(__str.data(), __pos, __str.size()); }
2164 :
2165 : /**
2166 : * @brief Find last position of a character not in C substring.
2167 : * @param __s C string containing characters to avoid.
2168 : * @param __pos Index of character to search back from.
2169 : * @param __n Number of characters from s to consider.
2170 : * @return Index of last occurrence.
2171 : *
2172 : * Starting from @a __pos, searches backward for a character not
2173 : * contained in the first @a __n characters of @a __s within this string.
2174 : * If found, returns the index where it was found. If not found,
2175 : * returns npos.
2176 : */
2177 : size_type
2178 : find_last_not_of(const _CharT* __s, size_type __pos,
2179 : size_type __n) const;
2180 : /**
2181 : * @brief Find last position of a character not in C string.
2182 : * @param __s C string containing characters to avoid.
2183 : * @param __pos Index of character to search back from (default end).
2184 : * @return Index of last occurrence.
2185 : *
2186 : * Starting from @a __pos, searches backward for a character
2187 : * not contained in @a __s within this string. If found,
2188 : * returns the index where it was found. If not found, returns
2189 : * npos.
2190 : */
2191 : size_type
2192 : find_last_not_of(const _CharT* __s, size_type __pos = npos) const
2193 : {
2194 : __glibcxx_requires_string(__s);
2195 : return this->find_last_not_of(__s, __pos, traits_type::length(__s));
2196 : }
2197 :
2198 : /**
2199 : * @brief Find last position of a different character.
2200 : * @param __c Character to avoid.
2201 : * @param __pos Index of character to search back from (default end).
2202 : * @return Index of last occurrence.
2203 : *
2204 : * Starting from @a __pos, searches backward for a character other than
2205 : * @a __c within this string. If found, returns the index where it was
2206 : * found. If not found, returns npos.
2207 : */
2208 : size_type
2209 : find_last_not_of(_CharT __c, size_type __pos = npos) const
2210 : _GLIBCXX_NOEXCEPT;
2211 :
2212 : /**
2213 : * @brief Get a substring.
2214 : * @param __pos Index of first character (default 0).
2215 : * @param __n Number of characters in substring (default remainder).
2216 : * @return The new string.
2217 : * @throw std::out_of_range If __pos > size().
2218 : *
2219 : * Construct and return a new string using the @a __n
2220 : * characters starting at @a __pos. If the string is too
2221 : * short, use the remainder of the characters. If @a __pos is
2222 : * beyond the end of the string, out_of_range is thrown.
2223 : */
2224 : basic_string
2225 : substr(size_type __pos = 0, size_type __n = npos) const
2226 : { return basic_string(*this,
2227 : _M_check(__pos, "basic_string::substr"), __n); }
2228 :
2229 : /**
2230 : * @brief Compare to a string.
2231 : * @param __str String to compare against.
2232 : * @return Integer < 0, 0, or > 0.
2233 : *
2234 : * Returns an integer < 0 if this string is ordered before @a
2235 : * __str, 0 if their values are equivalent, or > 0 if this
2236 : * string is ordered after @a __str. Determines the effective
2237 : * length rlen of the strings to compare as the smallest of
2238 : * size() and str.size(). The function then compares the two
2239 : * strings by calling traits::compare(data(), str.data(),rlen).
2240 : * If the result of the comparison is nonzero returns it,
2241 : * otherwise the shorter one is ordered first.
2242 : */
2243 : int
2244 0 : compare(const basic_string& __str) const
2245 : {
2246 0 : const size_type __size = this->size();
2247 0 : const size_type __osize = __str.size();
2248 0 : const size_type __len = std::min(__size, __osize);
2249 :
2250 0 : int __r = traits_type::compare(_M_data(), __str.data(), __len);
2251 0 : if (!__r)
2252 0 : __r = _S_compare(__size, __osize);
2253 0 : return __r;
2254 : }
2255 :
2256 : /**
2257 : * @brief Compare substring to a string.
2258 : * @param __pos Index of first character of substring.
2259 : * @param __n Number of characters in substring.
2260 : * @param __str String to compare against.
2261 : * @return Integer < 0, 0, or > 0.
2262 : *
2263 : * Form the substring of this string from the @a __n characters
2264 : * starting at @a __pos. Returns an integer < 0 if the
2265 : * substring is ordered before @a __str, 0 if their values are
2266 : * equivalent, or > 0 if the substring is ordered after @a
2267 : * __str. Determines the effective length rlen of the strings
2268 : * to compare as the smallest of the length of the substring
2269 : * and @a __str.size(). The function then compares the two
2270 : * strings by calling
2271 : * traits::compare(substring.data(),str.data(),rlen). If the
2272 : * result of the comparison is nonzero returns it, otherwise
2273 : * the shorter one is ordered first.
2274 : */
2275 : int
2276 : compare(size_type __pos, size_type __n, const basic_string& __str) const;
2277 :
2278 : /**
2279 : * @brief Compare substring to a substring.
2280 : * @param __pos1 Index of first character of substring.
2281 : * @param __n1 Number of characters in substring.
2282 : * @param __str String to compare against.
2283 : * @param __pos2 Index of first character of substring of str.
2284 : * @param __n2 Number of characters in substring of str.
2285 : * @return Integer < 0, 0, or > 0.
2286 : *
2287 : * Form the substring of this string from the @a __n1
2288 : * characters starting at @a __pos1. Form the substring of @a
2289 : * __str from the @a __n2 characters starting at @a __pos2.
2290 : * Returns an integer < 0 if this substring is ordered before
2291 : * the substring of @a __str, 0 if their values are equivalent,
2292 : * or > 0 if this substring is ordered after the substring of
2293 : * @a __str. Determines the effective length rlen of the
2294 : * strings to compare as the smallest of the lengths of the
2295 : * substrings. The function then compares the two strings by
2296 : * calling
2297 : * traits::compare(substring.data(),str.substr(pos2,n2).data(),rlen).
2298 : * If the result of the comparison is nonzero returns it,
2299 : * otherwise the shorter one is ordered first.
2300 : */
2301 : int
2302 : compare(size_type __pos1, size_type __n1, const basic_string& __str,
2303 : size_type __pos2, size_type __n2) const;
2304 :
2305 : /**
2306 : * @brief Compare to a C string.
2307 : * @param __s C string to compare against.
2308 : * @return Integer < 0, 0, or > 0.
2309 : *
2310 : * Returns an integer < 0 if this string is ordered before @a __s, 0 if
2311 : * their values are equivalent, or > 0 if this string is ordered after
2312 : * @a __s. Determines the effective length rlen of the strings to
2313 : * compare as the smallest of size() and the length of a string
2314 : * constructed from @a __s. The function then compares the two strings
2315 : * by calling traits::compare(data(),s,rlen). If the result of the
2316 : * comparison is nonzero returns it, otherwise the shorter one is
2317 : * ordered first.
2318 : */
2319 : int
2320 : compare(const _CharT* __s) const;
2321 :
2322 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
2323 : // 5 String::compare specification questionable
2324 : /**
2325 : * @brief Compare substring to a C string.
2326 : * @param __pos Index of first character of substring.
2327 : * @param __n1 Number of characters in substring.
2328 : * @param __s C string to compare against.
2329 : * @return Integer < 0, 0, or > 0.
2330 : *
2331 : * Form the substring of this string from the @a __n1
2332 : * characters starting at @a pos. Returns an integer < 0 if
2333 : * the substring is ordered before @a __s, 0 if their values
2334 : * are equivalent, or > 0 if the substring is ordered after @a
2335 : * __s. Determines the effective length rlen of the strings to
2336 : * compare as the smallest of the length of the substring and
2337 : * the length of a string constructed from @a __s. The
2338 : * function then compares the two string by calling
2339 : * traits::compare(substring.data(),__s,rlen). If the result of
2340 : * the comparison is nonzero returns it, otherwise the shorter
2341 : * one is ordered first.
2342 : */
2343 : int
2344 : compare(size_type __pos, size_type __n1, const _CharT* __s) const;
2345 :
2346 : /**
2347 : * @brief Compare substring against a character %array.
2348 : * @param __pos Index of first character of substring.
2349 : * @param __n1 Number of characters in substring.
2350 : * @param __s character %array to compare against.
2351 : * @param __n2 Number of characters of s.
2352 : * @return Integer < 0, 0, or > 0.
2353 : *
2354 : * Form the substring of this string from the @a __n1
2355 : * characters starting at @a __pos. Form a string from the
2356 : * first @a __n2 characters of @a __s. Returns an integer < 0
2357 : * if this substring is ordered before the string from @a __s,
2358 : * 0 if their values are equivalent, or > 0 if this substring
2359 : * is ordered after the string from @a __s. Determines the
2360 : * effective length rlen of the strings to compare as the
2361 : * smallest of the length of the substring and @a __n2. The
2362 : * function then compares the two strings by calling
2363 : * traits::compare(substring.data(),s,rlen). If the result of
2364 : * the comparison is nonzero returns it, otherwise the shorter
2365 : * one is ordered first.
2366 : *
2367 : * NB: s must have at least n2 characters, '\\0' has
2368 : * no special meaning.
2369 : */
2370 : int
2371 : compare(size_type __pos, size_type __n1, const _CharT* __s,
2372 : size_type __n2) const;
2373 : };
2374 :
2375 : // operator+
2376 : /**
2377 : * @brief Concatenate two strings.
2378 : * @param __lhs First string.
2379 : * @param __rhs Last string.
2380 : * @return New string with value of @a __lhs followed by @a __rhs.
2381 : */
2382 : template<typename _CharT, typename _Traits, typename _Alloc>
2383 : basic_string<_CharT, _Traits, _Alloc>
2384 : operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2385 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2386 : {
2387 : basic_string<_CharT, _Traits, _Alloc> __str(__lhs);
2388 : __str.append(__rhs);
2389 : return __str;
2390 : }
2391 :
2392 : /**
2393 : * @brief Concatenate C string and string.
2394 : * @param __lhs First string.
2395 : * @param __rhs Last string.
2396 : * @return New string with value of @a __lhs followed by @a __rhs.
2397 : */
2398 : template<typename _CharT, typename _Traits, typename _Alloc>
2399 : basic_string<_CharT,_Traits,_Alloc>
2400 : operator+(const _CharT* __lhs,
2401 : const basic_string<_CharT,_Traits,_Alloc>& __rhs);
2402 :
2403 : /**
2404 : * @brief Concatenate character and string.
2405 : * @param __lhs First string.
2406 : * @param __rhs Last string.
2407 : * @return New string with @a __lhs followed by @a __rhs.
2408 : */
2409 : template<typename _CharT, typename _Traits, typename _Alloc>
2410 : basic_string<_CharT,_Traits,_Alloc>
2411 : operator+(_CharT __lhs, const basic_string<_CharT,_Traits,_Alloc>& __rhs);
2412 :
2413 : /**
2414 : * @brief Concatenate string and C string.
2415 : * @param __lhs First string.
2416 : * @param __rhs Last string.
2417 : * @return New string with @a __lhs followed by @a __rhs.
2418 : */
2419 : template<typename _CharT, typename _Traits, typename _Alloc>
2420 : inline basic_string<_CharT, _Traits, _Alloc>
2421 : operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2422 : const _CharT* __rhs)
2423 : {
2424 : basic_string<_CharT, _Traits, _Alloc> __str(__lhs);
2425 : __str.append(__rhs);
2426 : return __str;
2427 : }
2428 :
2429 : /**
2430 : * @brief Concatenate string and character.
2431 : * @param __lhs First string.
2432 : * @param __rhs Last string.
2433 : * @return New string with @a __lhs followed by @a __rhs.
2434 : */
2435 : template<typename _CharT, typename _Traits, typename _Alloc>
2436 : inline basic_string<_CharT, _Traits, _Alloc>
2437 : operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs, _CharT __rhs)
2438 : {
2439 : typedef basic_string<_CharT, _Traits, _Alloc> __string_type;
2440 : typedef typename __string_type::size_type __size_type;
2441 : __string_type __str(__lhs);
2442 : __str.append(__size_type(1), __rhs);
2443 : return __str;
2444 : }
2445 :
2446 : #if __cplusplus >= 201103L
2447 : template<typename _CharT, typename _Traits, typename _Alloc>
2448 : inline basic_string<_CharT, _Traits, _Alloc>
2449 : operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
2450 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2451 : { return std::move(__lhs.append(__rhs)); }
2452 :
2453 : template<typename _CharT, typename _Traits, typename _Alloc>
2454 : inline basic_string<_CharT, _Traits, _Alloc>
2455 : operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2456 : basic_string<_CharT, _Traits, _Alloc>&& __rhs)
2457 : { return std::move(__rhs.insert(0, __lhs)); }
2458 :
2459 : template<typename _CharT, typename _Traits, typename _Alloc>
2460 : inline basic_string<_CharT, _Traits, _Alloc>
2461 : operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
2462 : basic_string<_CharT, _Traits, _Alloc>&& __rhs)
2463 : {
2464 : const auto __size = __lhs.size() + __rhs.size();
2465 : const bool __cond = (__size > __lhs.capacity()
2466 : && __size <= __rhs.capacity());
2467 : return __cond ? std::move(__rhs.insert(0, __lhs))
2468 : : std::move(__lhs.append(__rhs));
2469 : }
2470 :
2471 : template<typename _CharT, typename _Traits, typename _Alloc>
2472 : inline basic_string<_CharT, _Traits, _Alloc>
2473 : operator+(const _CharT* __lhs,
2474 : basic_string<_CharT, _Traits, _Alloc>&& __rhs)
2475 : { return std::move(__rhs.insert(0, __lhs)); }
2476 :
2477 : template<typename _CharT, typename _Traits, typename _Alloc>
2478 : inline basic_string<_CharT, _Traits, _Alloc>
2479 : operator+(_CharT __lhs,
2480 : basic_string<_CharT, _Traits, _Alloc>&& __rhs)
2481 : { return std::move(__rhs.insert(0, 1, __lhs)); }
2482 :
2483 : template<typename _CharT, typename _Traits, typename _Alloc>
2484 : inline basic_string<_CharT, _Traits, _Alloc>
2485 : operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
2486 : const _CharT* __rhs)
2487 : { return std::move(__lhs.append(__rhs)); }
2488 :
2489 : template<typename _CharT, typename _Traits, typename _Alloc>
2490 : inline basic_string<_CharT, _Traits, _Alloc>
2491 : operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
2492 : _CharT __rhs)
2493 : { return std::move(__lhs.append(1, __rhs)); }
2494 : #endif
2495 :
2496 : // operator ==
2497 : /**
2498 : * @brief Test equivalence of two strings.
2499 : * @param __lhs First string.
2500 : * @param __rhs Second string.
2501 : * @return True if @a __lhs.compare(@a __rhs) == 0. False otherwise.
2502 : */
2503 : template<typename _CharT, typename _Traits, typename _Alloc>
2504 : inline bool
2505 : operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2506 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2507 : { return __lhs.compare(__rhs) == 0; }
2508 :
2509 : template<typename _CharT>
2510 : inline
2511 : typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value, bool>::__type
2512 : operator==(const basic_string<_CharT>& __lhs,
2513 : const basic_string<_CharT>& __rhs)
2514 : { return (__lhs.size() == __rhs.size()
2515 : && !std::char_traits<_CharT>::compare(__lhs.data(), __rhs.data(),
2516 : __lhs.size())); }
2517 :
2518 : /**
2519 : * @brief Test equivalence of C string and string.
2520 : * @param __lhs C string.
2521 : * @param __rhs String.
2522 : * @return True if @a __rhs.compare(@a __lhs) == 0. False otherwise.
2523 : */
2524 : template<typename _CharT, typename _Traits, typename _Alloc>
2525 : inline bool
2526 : operator==(const _CharT* __lhs,
2527 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2528 : { return __rhs.compare(__lhs) == 0; }
2529 :
2530 : /**
2531 : * @brief Test equivalence of string and C string.
2532 : * @param __lhs String.
2533 : * @param __rhs C string.
2534 : * @return True if @a __lhs.compare(@a __rhs) == 0. False otherwise.
2535 : */
2536 : template<typename _CharT, typename _Traits, typename _Alloc>
2537 : inline bool
2538 0 : operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2539 : const _CharT* __rhs)
2540 0 : { return __lhs.compare(__rhs) == 0; }
2541 :
2542 : // operator !=
2543 : /**
2544 : * @brief Test difference of two strings.
2545 : * @param __lhs First string.
2546 : * @param __rhs Second string.
2547 : * @return True if @a __lhs.compare(@a __rhs) != 0. False otherwise.
2548 : */
2549 : template<typename _CharT, typename _Traits, typename _Alloc>
2550 : inline bool
2551 : operator!=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2552 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2553 : { return !(__lhs == __rhs); }
2554 :
2555 : /**
2556 : * @brief Test difference of C string and string.
2557 : * @param __lhs C string.
2558 : * @param __rhs String.
2559 : * @return True if @a __rhs.compare(@a __lhs) != 0. False otherwise.
2560 : */
2561 : template<typename _CharT, typename _Traits, typename _Alloc>
2562 : inline bool
2563 : operator!=(const _CharT* __lhs,
2564 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2565 : { return !(__lhs == __rhs); }
2566 :
2567 : /**
2568 : * @brief Test difference of string and C string.
2569 : * @param __lhs String.
2570 : * @param __rhs C string.
2571 : * @return True if @a __lhs.compare(@a __rhs) != 0. False otherwise.
2572 : */
2573 : template<typename _CharT, typename _Traits, typename _Alloc>
2574 : inline bool
2575 : operator!=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2576 : const _CharT* __rhs)
2577 : { return !(__lhs == __rhs); }
2578 :
2579 : // operator <
2580 : /**
2581 : * @brief Test if string precedes string.
2582 : * @param __lhs First string.
2583 : * @param __rhs Second string.
2584 : * @return True if @a __lhs precedes @a __rhs. False otherwise.
2585 : */
2586 : template<typename _CharT, typename _Traits, typename _Alloc>
2587 : inline bool
2588 0 : operator<(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2589 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2590 0 : { return __lhs.compare(__rhs) < 0; }
2591 :
2592 : /**
2593 : * @brief Test if string precedes C string.
2594 : * @param __lhs String.
2595 : * @param __rhs C string.
2596 : * @return True if @a __lhs precedes @a __rhs. False otherwise.
2597 : */
2598 : template<typename _CharT, typename _Traits, typename _Alloc>
2599 : inline bool
2600 : operator<(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2601 : const _CharT* __rhs)
2602 : { return __lhs.compare(__rhs) < 0; }
2603 :
2604 : /**
2605 : * @brief Test if C string precedes string.
2606 : * @param __lhs C string.
2607 : * @param __rhs String.
2608 : * @return True if @a __lhs precedes @a __rhs. False otherwise.
2609 : */
2610 : template<typename _CharT, typename _Traits, typename _Alloc>
2611 : inline bool
2612 : operator<(const _CharT* __lhs,
2613 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2614 : { return __rhs.compare(__lhs) > 0; }
2615 :
2616 : // operator >
2617 : /**
2618 : * @brief Test if string follows string.
2619 : * @param __lhs First string.
2620 : * @param __rhs Second string.
2621 : * @return True if @a __lhs follows @a __rhs. False otherwise.
2622 : */
2623 : template<typename _CharT, typename _Traits, typename _Alloc>
2624 : inline bool
2625 : operator>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2626 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2627 : { return __lhs.compare(__rhs) > 0; }
2628 :
2629 : /**
2630 : * @brief Test if string follows C string.
2631 : * @param __lhs String.
2632 : * @param __rhs C string.
2633 : * @return True if @a __lhs follows @a __rhs. False otherwise.
2634 : */
2635 : template<typename _CharT, typename _Traits, typename _Alloc>
2636 : inline bool
2637 : operator>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2638 : const _CharT* __rhs)
2639 : { return __lhs.compare(__rhs) > 0; }
2640 :
2641 : /**
2642 : * @brief Test if C string follows string.
2643 : * @param __lhs C string.
2644 : * @param __rhs String.
2645 : * @return True if @a __lhs follows @a __rhs. False otherwise.
2646 : */
2647 : template<typename _CharT, typename _Traits, typename _Alloc>
2648 : inline bool
2649 : operator>(const _CharT* __lhs,
2650 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2651 : { return __rhs.compare(__lhs) < 0; }
2652 :
2653 : // operator <=
2654 : /**
2655 : * @brief Test if string doesn't follow string.
2656 : * @param __lhs First string.
2657 : * @param __rhs Second string.
2658 : * @return True if @a __lhs doesn't follow @a __rhs. False otherwise.
2659 : */
2660 : template<typename _CharT, typename _Traits, typename _Alloc>
2661 : inline bool
2662 : operator<=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2663 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2664 : { return __lhs.compare(__rhs) <= 0; }
2665 :
2666 : /**
2667 : * @brief Test if string doesn't follow C string.
2668 : * @param __lhs String.
2669 : * @param __rhs C string.
2670 : * @return True if @a __lhs doesn't follow @a __rhs. False otherwise.
2671 : */
2672 : template<typename _CharT, typename _Traits, typename _Alloc>
2673 : inline bool
2674 : operator<=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2675 : const _CharT* __rhs)
2676 : { return __lhs.compare(__rhs) <= 0; }
2677 :
2678 : /**
2679 : * @brief Test if C string doesn't follow string.
2680 : * @param __lhs C string.
2681 : * @param __rhs String.
2682 : * @return True if @a __lhs doesn't follow @a __rhs. False otherwise.
2683 : */
2684 : template<typename _CharT, typename _Traits, typename _Alloc>
2685 : inline bool
2686 : operator<=(const _CharT* __lhs,
2687 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2688 : { return __rhs.compare(__lhs) >= 0; }
2689 :
2690 : // operator >=
2691 : /**
2692 : * @brief Test if string doesn't precede string.
2693 : * @param __lhs First string.
2694 : * @param __rhs Second string.
2695 : * @return True if @a __lhs doesn't precede @a __rhs. False otherwise.
2696 : */
2697 : template<typename _CharT, typename _Traits, typename _Alloc>
2698 : inline bool
2699 : operator>=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2700 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2701 : { return __lhs.compare(__rhs) >= 0; }
2702 :
2703 : /**
2704 : * @brief Test if string doesn't precede C string.
2705 : * @param __lhs String.
2706 : * @param __rhs C string.
2707 : * @return True if @a __lhs doesn't precede @a __rhs. False otherwise.
2708 : */
2709 : template<typename _CharT, typename _Traits, typename _Alloc>
2710 : inline bool
2711 : operator>=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
2712 : const _CharT* __rhs)
2713 : { return __lhs.compare(__rhs) >= 0; }
2714 :
2715 : /**
2716 : * @brief Test if C string doesn't precede string.
2717 : * @param __lhs C string.
2718 : * @param __rhs String.
2719 : * @return True if @a __lhs doesn't precede @a __rhs. False otherwise.
2720 : */
2721 : template<typename _CharT, typename _Traits, typename _Alloc>
2722 : inline bool
2723 : operator>=(const _CharT* __lhs,
2724 : const basic_string<_CharT, _Traits, _Alloc>& __rhs)
2725 : { return __rhs.compare(__lhs) <= 0; }
2726 :
2727 : /**
2728 : * @brief Swap contents of two strings.
2729 : * @param __lhs First string.
2730 : * @param __rhs Second string.
2731 : *
2732 : * Exchanges the contents of @a __lhs and @a __rhs in constant time.
2733 : */
2734 : template<typename _CharT, typename _Traits, typename _Alloc>
2735 : inline void
2736 : swap(basic_string<_CharT, _Traits, _Alloc>& __lhs,
2737 : basic_string<_CharT, _Traits, _Alloc>& __rhs)
2738 : { __lhs.swap(__rhs); }
2739 :
2740 : /**
2741 : * @brief Read stream into a string.
2742 : * @param __is Input stream.
2743 : * @param __str Buffer to store into.
2744 : * @return Reference to the input stream.
2745 : *
2746 : * Stores characters from @a __is into @a __str until whitespace is
2747 : * found, the end of the stream is encountered, or str.max_size()
2748 : * is reached. If is.width() is non-zero, that is the limit on the
2749 : * number of characters stored into @a __str. Any previous
2750 : * contents of @a __str are erased.
2751 : */
2752 : template<typename _CharT, typename _Traits, typename _Alloc>
2753 : basic_istream<_CharT, _Traits>&
2754 : operator>>(basic_istream<_CharT, _Traits>& __is,
2755 : basic_string<_CharT, _Traits, _Alloc>& __str);
2756 :
2757 : template<>
2758 : basic_istream<char>&
2759 : operator>>(basic_istream<char>& __is, basic_string<char>& __str);
2760 :
2761 : /**
2762 : * @brief Write string to a stream.
2763 : * @param __os Output stream.
2764 : * @param __str String to write out.
2765 : * @return Reference to the output stream.
2766 : *
2767 : * Output characters of @a __str into os following the same rules as for
2768 : * writing a C string.
2769 : */
2770 : template<typename _CharT, typename _Traits, typename _Alloc>
2771 : inline basic_ostream<_CharT, _Traits>&
2772 0 : operator<<(basic_ostream<_CharT, _Traits>& __os,
2773 : const basic_string<_CharT, _Traits, _Alloc>& __str)
2774 : {
2775 : // _GLIBCXX_RESOLVE_LIB_DEFECTS
2776 : // 586. string inserter not a formatted function
2777 0 : return __ostream_insert(__os, __str.data(), __str.size());
2778 : }
2779 :
2780 : /**
2781 : * @brief Read a line from stream into a string.
2782 : * @param __is Input stream.
2783 : * @param __str Buffer to store into.
2784 : * @param __delim Character marking end of line.
2785 : * @return Reference to the input stream.
2786 : *
2787 : * Stores characters from @a __is into @a __str until @a __delim is
2788 : * found, the end of the stream is encountered, or str.max_size()
2789 : * is reached. Any previous contents of @a __str are erased. If
2790 : * @a __delim is encountered, it is extracted but not stored into
2791 : * @a __str.
2792 : */
2793 : template<typename _CharT, typename _Traits, typename _Alloc>
2794 : basic_istream<_CharT, _Traits>&
2795 : getline(basic_istream<_CharT, _Traits>& __is,
2796 : basic_string<_CharT, _Traits, _Alloc>& __str, _CharT __delim);
2797 :
2798 : /**
2799 : * @brief Read a line from stream into a string.
2800 : * @param __is Input stream.
2801 : * @param __str Buffer to store into.
2802 : * @return Reference to the input stream.
2803 : *
2804 : * Stores characters from is into @a __str until '\n' is
2805 : * found, the end of the stream is encountered, or str.max_size()
2806 : * is reached. Any previous contents of @a __str are erased. If
2807 : * end of line is encountered, it is extracted but not stored into
2808 : * @a __str.
2809 : */
2810 : template<typename _CharT, typename _Traits, typename _Alloc>
2811 : inline basic_istream<_CharT, _Traits>&
2812 : getline(basic_istream<_CharT, _Traits>& __is,
2813 : basic_string<_CharT, _Traits, _Alloc>& __str)
2814 : { return std::getline(__is, __str, __is.widen('\n')); }
2815 :
2816 : #if __cplusplus >= 201103L
2817 : /// Read a line from an rvalue stream into a string.
2818 : template<typename _CharT, typename _Traits, typename _Alloc>
2819 : inline basic_istream<_CharT, _Traits>&
2820 : getline(basic_istream<_CharT, _Traits>&& __is,
2821 : basic_string<_CharT, _Traits, _Alloc>& __str, _CharT __delim)
2822 : { return std::getline(__is, __str, __delim); }
2823 :
2824 : /// Read a line from an rvalue stream into a string.
2825 : template<typename _CharT, typename _Traits, typename _Alloc>
2826 : inline basic_istream<_CharT, _Traits>&
2827 : getline(basic_istream<_CharT, _Traits>&& __is,
2828 : basic_string<_CharT, _Traits, _Alloc>& __str)
2829 : { return std::getline(__is, __str); }
2830 : #endif
2831 :
2832 : template<>
2833 : basic_istream<char>&
2834 : getline(basic_istream<char>& __in, basic_string<char>& __str,
2835 : char __delim);
2836 :
2837 : #ifdef _GLIBCXX_USE_WCHAR_T
2838 : template<>
2839 : basic_istream<wchar_t>&
2840 : getline(basic_istream<wchar_t>& __in, basic_string<wchar_t>& __str,
2841 : wchar_t __delim);
2842 : #endif
2843 :
2844 : _GLIBCXX_END_NAMESPACE_VERSION
2845 : } // namespace
2846 :
2847 : #if ((__cplusplus >= 201103L) && defined(_GLIBCXX_USE_C99) \
2848 : && !defined(_GLIBCXX_HAVE_BROKEN_VSWPRINTF))
2849 :
2850 : #include <ext/string_conversions.h>
2851 :
2852 : namespace std _GLIBCXX_VISIBILITY(default)
2853 : {
2854 : _GLIBCXX_BEGIN_NAMESPACE_VERSION
2855 :
2856 : // 21.4 Numeric Conversions [string.conversions].
2857 : inline int
2858 : stoi(const string& __str, size_t* __idx = 0, int __base = 10)
2859 : { return __gnu_cxx::__stoa<long, int>(&std::strtol, "stoi", __str.c_str(),
2860 : __idx, __base); }
2861 :
2862 : inline long
2863 : stol(const string& __str, size_t* __idx = 0, int __base = 10)
2864 : { return __gnu_cxx::__stoa(&std::strtol, "stol", __str.c_str(),
2865 : __idx, __base); }
2866 :
2867 : inline unsigned long
2868 : stoul(const string& __str, size_t* __idx = 0, int __base = 10)
2869 : { return __gnu_cxx::__stoa(&std::strtoul, "stoul", __str.c_str(),
2870 : __idx, __base); }
2871 :
2872 : inline long long
2873 : stoll(const string& __str, size_t* __idx = 0, int __base = 10)
2874 : { return __gnu_cxx::__stoa(&std::strtoll, "stoll", __str.c_str(),
2875 : __idx, __base); }
2876 :
2877 : inline unsigned long long
2878 : stoull(const string& __str, size_t* __idx = 0, int __base = 10)
2879 : { return __gnu_cxx::__stoa(&std::strtoull, "stoull", __str.c_str(),
2880 : __idx, __base); }
2881 :
2882 : // NB: strtof vs strtod.
2883 : inline float
2884 : stof(const string& __str, size_t* __idx = 0)
2885 : { return __gnu_cxx::__stoa(&std::strtof, "stof", __str.c_str(), __idx); }
2886 :
2887 : inline double
2888 : stod(const string& __str, size_t* __idx = 0)
2889 : { return __gnu_cxx::__stoa(&std::strtod, "stod", __str.c_str(), __idx); }
2890 :
2891 : inline long double
2892 : stold(const string& __str, size_t* __idx = 0)
2893 : { return __gnu_cxx::__stoa(&std::strtold, "stold", __str.c_str(), __idx); }
2894 :
2895 : // NB: (v)snprintf vs sprintf.
2896 :
2897 : // DR 1261.
2898 : inline string
2899 : to_string(int __val)
2900 : { return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, 4 * sizeof(int),
2901 : "%d", __val); }
2902 :
2903 : inline string
2904 : to_string(unsigned __val)
2905 : { return __gnu_cxx::__to_xstring<string>(&std::vsnprintf,
2906 : 4 * sizeof(unsigned),
2907 : "%u", __val); }
2908 :
2909 : inline string
2910 67 : to_string(long __val)
2911 : { return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, 4 * sizeof(long),
2912 67 : "%ld", __val); }
2913 :
2914 : inline string
2915 0 : to_string(unsigned long __val)
2916 : { return __gnu_cxx::__to_xstring<string>(&std::vsnprintf,
2917 : 4 * sizeof(unsigned long),
2918 0 : "%lu", __val); }
2919 :
2920 : inline string
2921 : to_string(long long __val)
2922 : { return __gnu_cxx::__to_xstring<string>(&std::vsnprintf,
2923 : 4 * sizeof(long long),
2924 : "%lld", __val); }
2925 :
2926 : inline string
2927 : to_string(unsigned long long __val)
2928 : { return __gnu_cxx::__to_xstring<string>(&std::vsnprintf,
2929 : 4 * sizeof(unsigned long long),
2930 : "%llu", __val); }
2931 :
2932 : inline string
2933 : to_string(float __val)
2934 : {
2935 : const int __n =
2936 : __gnu_cxx::__numeric_traits<float>::__max_exponent10 + 20;
2937 : return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, __n,
2938 : "%f", __val);
2939 : }
2940 :
2941 : inline string
2942 : to_string(double __val)
2943 : {
2944 : const int __n =
2945 : __gnu_cxx::__numeric_traits<double>::__max_exponent10 + 20;
2946 : return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, __n,
2947 : "%f", __val);
2948 : }
2949 :
2950 : inline string
2951 : to_string(long double __val)
2952 : {
2953 : const int __n =
2954 : __gnu_cxx::__numeric_traits<long double>::__max_exponent10 + 20;
2955 : return __gnu_cxx::__to_xstring<string>(&std::vsnprintf, __n,
2956 : "%Lf", __val);
2957 : }
2958 :
2959 : #ifdef _GLIBCXX_USE_WCHAR_T
2960 : inline int
2961 : stoi(const wstring& __str, size_t* __idx = 0, int __base = 10)
2962 : { return __gnu_cxx::__stoa<long, int>(&std::wcstol, "stoi", __str.c_str(),
2963 : __idx, __base); }
2964 :
2965 : inline long
2966 : stol(const wstring& __str, size_t* __idx = 0, int __base = 10)
2967 : { return __gnu_cxx::__stoa(&std::wcstol, "stol", __str.c_str(),
2968 : __idx, __base); }
2969 :
2970 : inline unsigned long
2971 : stoul(const wstring& __str, size_t* __idx = 0, int __base = 10)
2972 : { return __gnu_cxx::__stoa(&std::wcstoul, "stoul", __str.c_str(),
2973 : __idx, __base); }
2974 :
2975 : inline long long
2976 : stoll(const wstring& __str, size_t* __idx = 0, int __base = 10)
2977 : { return __gnu_cxx::__stoa(&std::wcstoll, "stoll", __str.c_str(),
2978 : __idx, __base); }
2979 :
2980 : inline unsigned long long
2981 : stoull(const wstring& __str, size_t* __idx = 0, int __base = 10)
2982 : { return __gnu_cxx::__stoa(&std::wcstoull, "stoull", __str.c_str(),
2983 : __idx, __base); }
2984 :
2985 : // NB: wcstof vs wcstod.
2986 : inline float
2987 : stof(const wstring& __str, size_t* __idx = 0)
2988 : { return __gnu_cxx::__stoa(&std::wcstof, "stof", __str.c_str(), __idx); }
2989 :
2990 : inline double
2991 : stod(const wstring& __str, size_t* __idx = 0)
2992 : { return __gnu_cxx::__stoa(&std::wcstod, "stod", __str.c_str(), __idx); }
2993 :
2994 : inline long double
2995 : stold(const wstring& __str, size_t* __idx = 0)
2996 : { return __gnu_cxx::__stoa(&std::wcstold, "stold", __str.c_str(), __idx); }
2997 :
2998 : // DR 1261.
2999 : inline wstring
3000 : to_wstring(int __val)
3001 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf, 4 * sizeof(int),
3002 : L"%d", __val); }
3003 :
3004 : inline wstring
3005 : to_wstring(unsigned __val)
3006 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf,
3007 : 4 * sizeof(unsigned),
3008 : L"%u", __val); }
3009 :
3010 : inline wstring
3011 : to_wstring(long __val)
3012 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf, 4 * sizeof(long),
3013 : L"%ld", __val); }
3014 :
3015 : inline wstring
3016 : to_wstring(unsigned long __val)
3017 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf,
3018 : 4 * sizeof(unsigned long),
3019 : L"%lu", __val); }
3020 :
3021 : inline wstring
3022 : to_wstring(long long __val)
3023 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf,
3024 : 4 * sizeof(long long),
3025 : L"%lld", __val); }
3026 :
3027 : inline wstring
3028 : to_wstring(unsigned long long __val)
3029 : { return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf,
3030 : 4 * sizeof(unsigned long long),
3031 : L"%llu", __val); }
3032 :
3033 : inline wstring
3034 : to_wstring(float __val)
3035 : {
3036 : const int __n =
3037 : __gnu_cxx::__numeric_traits<float>::__max_exponent10 + 20;
3038 : return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf, __n,
3039 : L"%f", __val);
3040 : }
3041 :
3042 : inline wstring
3043 : to_wstring(double __val)
3044 : {
3045 : const int __n =
3046 : __gnu_cxx::__numeric_traits<double>::__max_exponent10 + 20;
3047 : return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf, __n,
3048 : L"%f", __val);
3049 : }
3050 :
3051 : inline wstring
3052 : to_wstring(long double __val)
3053 : {
3054 : const int __n =
3055 : __gnu_cxx::__numeric_traits<long double>::__max_exponent10 + 20;
3056 : return __gnu_cxx::__to_xstring<wstring>(&std::vswprintf, __n,
3057 : L"%Lf", __val);
3058 : }
3059 : #endif
3060 :
3061 : _GLIBCXX_END_NAMESPACE_VERSION
3062 : } // namespace
3063 :
3064 : #endif /* C++11 && _GLIBCXX_USE_C99 ... */
3065 :
3066 : #if __cplusplus >= 201103L
3067 :
3068 : #include <bits/functional_hash.h>
3069 :
3070 : namespace std _GLIBCXX_VISIBILITY(default)
3071 : {
3072 : _GLIBCXX_BEGIN_NAMESPACE_VERSION
3073 :
3074 : // DR 1182.
3075 :
3076 : #ifndef _GLIBCXX_COMPATIBILITY_CXX0X
3077 : /// std::hash specialization for string.
3078 : template<>
3079 : struct hash<string>
3080 : : public __hash_base<size_t, string>
3081 : {
3082 : size_t
3083 : operator()(const string& __s) const noexcept
3084 : { return std::_Hash_impl::hash(__s.data(), __s.length()); }
3085 : };
3086 :
3087 : template<>
3088 : struct __is_fast_hash<hash<string>> : std::false_type
3089 : { };
3090 :
3091 : #ifdef _GLIBCXX_USE_WCHAR_T
3092 : /// std::hash specialization for wstring.
3093 : template<>
3094 : struct hash<wstring>
3095 : : public __hash_base<size_t, wstring>
3096 : {
3097 : size_t
3098 : operator()(const wstring& __s) const noexcept
3099 : { return std::_Hash_impl::hash(__s.data(),
3100 : __s.length() * sizeof(wchar_t)); }
3101 : };
3102 :
3103 : template<>
3104 : struct __is_fast_hash<hash<wstring>> : std::false_type
3105 : { };
3106 : #endif
3107 : #endif /* _GLIBCXX_COMPATIBILITY_CXX0X */
3108 :
3109 : #ifdef _GLIBCXX_USE_C99_STDINT_TR1
3110 : /// std::hash specialization for u16string.
3111 : template<>
3112 : struct hash<u16string>
3113 : : public __hash_base<size_t, u16string>
3114 : {
3115 : size_t
3116 : operator()(const u16string& __s) const noexcept
3117 : { return std::_Hash_impl::hash(__s.data(),
3118 : __s.length() * sizeof(char16_t)); }
3119 : };
3120 :
3121 : template<>
3122 : struct __is_fast_hash<hash<u16string>> : std::false_type
3123 : { };
3124 :
3125 : /// std::hash specialization for u32string.
3126 : template<>
3127 : struct hash<u32string>
3128 : : public __hash_base<size_t, u32string>
3129 : {
3130 : size_t
3131 : operator()(const u32string& __s) const noexcept
3132 : { return std::_Hash_impl::hash(__s.data(),
3133 : __s.length() * sizeof(char32_t)); }
3134 : };
3135 :
3136 : template<>
3137 : struct __is_fast_hash<hash<u32string>> : std::false_type
3138 : { };
3139 : #endif
3140 :
3141 : #if __cplusplus > 201103L
3142 :
3143 : #define __cpp_lib_string_udls 201304
3144 :
3145 : inline namespace literals
3146 : {
3147 : inline namespace string_literals
3148 : {
3149 :
3150 : inline basic_string<char>
3151 : operator""s(const char* __str, size_t __len)
3152 : { return basic_string<char>{__str, __len}; }
3153 :
3154 : #ifdef _GLIBCXX_USE_WCHAR_T
3155 : inline basic_string<wchar_t>
3156 : operator""s(const wchar_t* __str, size_t __len)
3157 : { return basic_string<wchar_t>{__str, __len}; }
3158 : #endif
3159 :
3160 : #ifdef _GLIBCXX_USE_C99_STDINT_TR1
3161 : inline basic_string<char16_t>
3162 : operator""s(const char16_t* __str, size_t __len)
3163 : { return basic_string<char16_t>{__str, __len}; }
3164 :
3165 : inline basic_string<char32_t>
3166 : operator""s(const char32_t* __str, size_t __len)
3167 : { return basic_string<char32_t>{__str, __len}; }
3168 : #endif
3169 :
3170 : } // inline namespace string_literals
3171 : } // inline namespace literals
3172 :
3173 : #endif // __cplusplus > 201103L
3174 :
3175 : _GLIBCXX_END_NAMESPACE_VERSION
3176 : } // namespace std
3177 :
3178 : #endif // C++11
3179 :
3180 : #endif /* _BASIC_STRING_H */
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