1// Locale support -*- C++ -*-
2
3// Copyright (C) 1997-2017 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/locale_classes.h
26 * This is an internal header file, included by other library headers.
27 * Do not attempt to use it directly. @headername{locale}
28 */
29
30//
31// ISO C++ 14882: 22.1 Locales
32//
33
34#ifndef _LOCALE_CLASSES_H
35#define _LOCALE_CLASSES_H 1
36
37#pragma GCC system_header
38
39#include <bits/localefwd.h>
40#include <string>
41#include <ext/atomicity.h>
42
43namespace std _GLIBCXX_VISIBILITY(default)
44{
45_GLIBCXX_BEGIN_NAMESPACE_VERSION
46
47 // 22.1.1 Class locale
48 /**
49 * @brief Container class for localization functionality.
50 * @ingroup locales
51 *
52 * The locale class is first a class wrapper for C library locales. It is
53 * also an extensible container for user-defined localization. A locale is
54 * a collection of facets that implement various localization features such
55 * as money, time, and number printing.
56 *
57 * Constructing C++ locales does not change the C library locale.
58 *
59 * This library supports efficient construction and copying of locales
60 * through a reference counting implementation of the locale class.
61 */
62 class locale
63 {
64 public:
65 // Types:
66 /// Definition of locale::category.
67 typedef int category;
68
69 // Forward decls and friends:
70 class facet;
71 class id;
72 class _Impl;
73
74 friend class facet;
75 friend class _Impl;
76
77 template<typename _Facet>
78 friend bool
79 has_facet(const locale&) throw();
80
81 template<typename _Facet>
82 friend const _Facet&
83 use_facet(const locale&);
84
85 template<typename _Cache>
86 friend struct __use_cache;
87
88 //@{
89 /**
90 * @brief Category values.
91 *
92 * The standard category values are none, ctype, numeric, collate, time,
93 * monetary, and messages. They form a bitmask that supports union and
94 * intersection. The category all is the union of these values.
95 *
96 * NB: Order must match _S_facet_categories definition in locale.cc
97 */
98 static const category none = 0;
99 static const category ctype = 1L << 0;
100 static const category numeric = 1L << 1;
101 static const category collate = 1L << 2;
102 static const category time = 1L << 3;
103 static const category monetary = 1L << 4;
104 static const category messages = 1L << 5;
105 static const category all = (ctype | numeric | collate |
106 time | monetary | messages);
107 //@}
108
109 // Construct/copy/destroy:
110
111 /**
112 * @brief Default constructor.
113 *
114 * Constructs a copy of the global locale. If no locale has been
115 * explicitly set, this is the C locale.
116 */
117 locale() throw();
118
119 /**
120 * @brief Copy constructor.
121 *
122 * Constructs a copy of @a other.
123 *
124 * @param __other The locale to copy.
125 */
126 locale(const locale& __other) throw();
127
128 /**
129 * @brief Named locale constructor.
130 *
131 * Constructs a copy of the named C library locale.
132 *
133 * @param __s Name of the locale to construct.
134 * @throw std::runtime_error if __s is null or an undefined locale.
135 */
136 explicit
137 locale(const char* __s);
138
139 /**
140 * @brief Construct locale with facets from another locale.
141 *
142 * Constructs a copy of the locale @a base. The facets specified by @a
143 * cat are replaced with those from the locale named by @a s. If base is
144 * named, this locale instance will also be named.
145 *
146 * @param __base The locale to copy.
147 * @param __s Name of the locale to use facets from.
148 * @param __cat Set of categories defining the facets to use from __s.
149 * @throw std::runtime_error if __s is null or an undefined locale.
150 */
151 locale(const locale& __base, const char* __s, category __cat);
152
153#if __cplusplus >= 201103L
154 /**
155 * @brief Named locale constructor.
156 *
157 * Constructs a copy of the named C library locale.
158 *
159 * @param __s Name of the locale to construct.
160 * @throw std::runtime_error if __s is an undefined locale.
161 */
162 explicit
163 locale(const std::string& __s) : locale(__s.c_str()) { }
164
165 /**
166 * @brief Construct locale with facets from another locale.
167 *
168 * Constructs a copy of the locale @a base. The facets specified by @a
169 * cat are replaced with those from the locale named by @a s. If base is
170 * named, this locale instance will also be named.
171 *
172 * @param __base The locale to copy.
173 * @param __s Name of the locale to use facets from.
174 * @param __cat Set of categories defining the facets to use from __s.
175 * @throw std::runtime_error if __s is an undefined locale.
176 */
177 locale(const locale& __base, const std::string& __s, category __cat)
178 : locale(__base, __s.c_str(), __cat) { }
179#endif
180
181 /**
182 * @brief Construct locale with facets from another locale.
183 *
184 * Constructs a copy of the locale @a base. The facets specified by @a
185 * cat are replaced with those from the locale @a add. If @a base and @a
186 * add are named, this locale instance will also be named.
187 *
188 * @param __base The locale to copy.
189 * @param __add The locale to use facets from.
190 * @param __cat Set of categories defining the facets to use from add.
191 */
192 locale(const locale& __base, const locale& __add, category __cat);
193
194 /**
195 * @brief Construct locale with another facet.
196 *
197 * Constructs a copy of the locale @a __other. The facet @a __f
198 * is added to @a __other, replacing an existing facet of type
199 * Facet if there is one. If @a __f is null, this locale is a
200 * copy of @a __other.
201 *
202 * @param __other The locale to copy.
203 * @param __f The facet to add in.
204 */
205 template<typename _Facet>
206 locale(const locale& __other, _Facet* __f);
207
208 /// Locale destructor.
209 ~locale() throw();
210
211 /**
212 * @brief Assignment operator.
213 *
214 * Set this locale to be a copy of @a other.
215 *
216 * @param __other The locale to copy.
217 * @return A reference to this locale.
218 */
219 const locale&
220 operator=(const locale& __other) throw();
221
222 /**
223 * @brief Construct locale with another facet.
224 *
225 * Constructs and returns a new copy of this locale. Adds or replaces an
226 * existing facet of type Facet from the locale @a other into the new
227 * locale.
228 *
229 * @tparam _Facet The facet type to copy from other
230 * @param __other The locale to copy from.
231 * @return Newly constructed locale.
232 * @throw std::runtime_error if __other has no facet of type _Facet.
233 */
234 template<typename _Facet>
235 locale
236 combine(const locale& __other) const;
237
238 // Locale operations:
239 /**
240 * @brief Return locale name.
241 * @return Locale name or "*" if unnamed.
242 */
243 _GLIBCXX_DEFAULT_ABI_TAG
244 string
245 name() const;
246
247 /**
248 * @brief Locale equality.
249 *
250 * @param __other The locale to compare against.
251 * @return True if other and this refer to the same locale instance, are
252 * copies, or have the same name. False otherwise.
253 */
254 bool
255 operator==(const locale& __other) const throw();
256
257 /**
258 * @brief Locale inequality.
259 *
260 * @param __other The locale to compare against.
261 * @return ! (*this == __other)
262 */
263 bool
264 operator!=(const locale& __other) const throw()
265 { return !(this->operator==(__other)); }
266
267 /**
268 * @brief Compare two strings according to collate.
269 *
270 * Template operator to compare two strings using the compare function of
271 * the collate facet in this locale. One use is to provide the locale to
272 * the sort function. For example, a vector v of strings could be sorted
273 * according to locale loc by doing:
274 * @code
275 * std::sort(v.begin(), v.end(), loc);
276 * @endcode
277 *
278 * @param __s1 First string to compare.
279 * @param __s2 Second string to compare.
280 * @return True if collate<_Char> facet compares __s1 < __s2, else false.
281 */
282 template<typename _Char, typename _Traits, typename _Alloc>
283 bool
284 operator()(const basic_string<_Char, _Traits, _Alloc>& __s1,
285 const basic_string<_Char, _Traits, _Alloc>& __s2) const;
286
287 // Global locale objects:
288 /**
289 * @brief Set global locale
290 *
291 * This function sets the global locale to the argument and returns a
292 * copy of the previous global locale. If the argument has a name, it
293 * will also call std::setlocale(LC_ALL, loc.name()).
294 *
295 * @param __loc The new locale to make global.
296 * @return Copy of the old global locale.
297 */
298 static locale
299 global(const locale& __loc);
300
301 /**
302 * @brief Return reference to the C locale.
303 */
304 static const locale&
305 classic();
306
307 private:
308 // The (shared) implementation
309 _Impl* _M_impl;
310
311 // The "C" reference locale
312 static _Impl* _S_classic;
313
314 // Current global locale
315 static _Impl* _S_global;
316
317 // Names of underlying locale categories.
318 // NB: locale::global() has to know how to modify all the
319 // underlying categories, not just the ones required by the C++
320 // standard.
321 static const char* const* const _S_categories;
322
323 // Number of standard categories. For C++, these categories are
324 // collate, ctype, monetary, numeric, time, and messages. These
325 // directly correspond to ISO C99 macros LC_COLLATE, LC_CTYPE,
326 // LC_MONETARY, LC_NUMERIC, and LC_TIME. In addition, POSIX (IEEE
327 // 1003.1-2001) specifies LC_MESSAGES.
328 // In addition to the standard categories, the underlying
329 // operating system is allowed to define extra LC_*
330 // macros. For GNU systems, the following are also valid:
331 // LC_PAPER, LC_NAME, LC_ADDRESS, LC_TELEPHONE, LC_MEASUREMENT,
332 // and LC_IDENTIFICATION.
333 enum { _S_categories_size = 6 + _GLIBCXX_NUM_CATEGORIES };
334
335#ifdef __GTHREADS
336 static __gthread_once_t _S_once;
337#endif
338
339 explicit
340 locale(_Impl*) throw();
341
342 static void
343 _S_initialize();
344
345 static void
346 _S_initialize_once() throw();
347
348 static category
349 _S_normalize_category(category);
350
351 void
352 _M_coalesce(const locale& __base, const locale& __add, category __cat);
353
354#if _GLIBCXX_USE_CXX11_ABI
355 static const id* const _S_twinned_facets[];
356#endif
357 };
358
359
360 // 22.1.1.1.2 Class locale::facet
361 /**
362 * @brief Localization functionality base class.
363 * @ingroup locales
364 *
365 * The facet class is the base class for a localization feature, such as
366 * money, time, and number printing. It provides common support for facets
367 * and reference management.
368 *
369 * Facets may not be copied or assigned.
370 */
371 class locale::facet
372 {
373 private:
374 friend class locale;
375 friend class locale::_Impl;
376
377 mutable _Atomic_word _M_refcount;
378
379 // Contains data from the underlying "C" library for the classic locale.
380 static __c_locale _S_c_locale;
381
382 // String literal for the name of the classic locale.
383 static const char _S_c_name[2];
384
385#ifdef __GTHREADS
386 static __gthread_once_t _S_once;
387#endif
388
389 static void
390 _S_initialize_once();
391
392 protected:
393 /**
394 * @brief Facet constructor.
395 *
396 * This is the constructor provided by the standard. If refs is 0, the
397 * facet is destroyed when the last referencing locale is destroyed.
398 * Otherwise the facet will never be destroyed.
399 *
400 * @param __refs The initial value for reference count.
401 */
402 explicit
403 facet(size_t __refs = 0) throw() : _M_refcount(__refs ? 1 : 0)
404 { }
405
406 /// Facet destructor.
407 virtual
408 ~facet();
409
410 static void
411 _S_create_c_locale(__c_locale& __cloc, const char* __s,
412 __c_locale __old = 0);
413
414 static __c_locale
415 _S_clone_c_locale(__c_locale& __cloc) throw();
416
417 static void
418 _S_destroy_c_locale(__c_locale& __cloc);
419
420 static __c_locale
421 _S_lc_ctype_c_locale(__c_locale __cloc, const char* __s);
422
423 // Returns data from the underlying "C" library data for the
424 // classic locale.
425 static __c_locale
426 _S_get_c_locale();
427
428 _GLIBCXX_CONST static const char*
429 _S_get_c_name() throw();
430
431#if __cplusplus < 201103L
432 private:
433 facet(const facet&); // Not defined.
434
435 facet&
436 operator=(const facet&); // Not defined.
437#else
438 facet(const facet&) = delete;
439
440 facet&
441 operator=(const facet&) = delete;
442#endif
443
444 private:
445 void
446 _M_add_reference() const throw()
447 { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); }
448
449 void
450 _M_remove_reference() const throw()
451 {
452 // Be race-detector-friendly. For more info see bits/c++config.
453 _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_refcount);
454 if (__gnu_cxx::__exchange_and_add_dispatch(&_M_refcount, -1) == 1)
455 {
456 _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&_M_refcount);
457 __try
458 { delete this; }
459 __catch(...)
460 { }
461 }
462 }
463
464 const facet* _M_sso_shim(const id*) const;
465 const facet* _M_cow_shim(const id*) const;
466
467 protected:
468 class __shim; // For internal use only.
469 };
470
471
472 // 22.1.1.1.3 Class locale::id
473 /**
474 * @brief Facet ID class.
475 * @ingroup locales
476 *
477 * The ID class provides facets with an index used to identify them.
478 * Every facet class must define a public static member locale::id, or be
479 * derived from a facet that provides this member, otherwise the facet
480 * cannot be used in a locale. The locale::id ensures that each class
481 * type gets a unique identifier.
482 */
483 class locale::id
484 {
485 private:
486 friend class locale;
487 friend class locale::_Impl;
488
489 template<typename _Facet>
490 friend const _Facet&
491 use_facet(const locale&);
492
493 template<typename _Facet>
494 friend bool
495 has_facet(const locale&) throw();
496
497 // NB: There is no accessor for _M_index because it may be used
498 // before the constructor is run; the effect of calling a member
499 // function (even an inline) would be undefined.
500 mutable size_t _M_index;
501
502 // Last id number assigned.
503 static _Atomic_word _S_refcount;
504
505 void
506 operator=(const id&); // Not defined.
507
508 id(const id&); // Not defined.
509
510 public:
511 // NB: This class is always a static data member, and thus can be
512 // counted on to be zero-initialized.
513 /// Constructor.
514 id() { }
515
516 size_t
517 _M_id() const throw();
518 };
519
520
521 // Implementation object for locale.
522 class locale::_Impl
523 {
524 public:
525 // Friends.
526 friend class locale;
527 friend class locale::facet;
528
529 template<typename _Facet>
530 friend bool
531 has_facet(const locale&) throw();
532
533 template<typename _Facet>
534 friend const _Facet&
535 use_facet(const locale&);
536
537 template<typename _Cache>
538 friend struct __use_cache;
539
540 private:
541 // Data Members.
542 _Atomic_word _M_refcount;
543 const facet** _M_facets;
544 size_t _M_facets_size;
545 const facet** _M_caches;
546 char** _M_names;
547 static const locale::id* const _S_id_ctype[];
548 static const locale::id* const _S_id_numeric[];
549 static const locale::id* const _S_id_collate[];
550 static const locale::id* const _S_id_time[];
551 static const locale::id* const _S_id_monetary[];
552 static const locale::id* const _S_id_messages[];
553 static const locale::id* const* const _S_facet_categories[];
554
555 void
556 _M_add_reference() throw()
557 { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); }
558
559 void
560 _M_remove_reference() throw()
561 {
562 // Be race-detector-friendly. For more info see bits/c++config.
563 _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_refcount);
564 if (__gnu_cxx::__exchange_and_add_dispatch(&_M_refcount, -1) == 1)
565 {
566 _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&_M_refcount);
567 __try
568 { delete this; }
569 __catch(...)
570 { }
571 }
572 }
573
574 _Impl(const _Impl&, size_t);
575 _Impl(const char*, size_t);
576 _Impl(size_t) throw();
577
578 ~_Impl() throw();
579
580 _Impl(const _Impl&); // Not defined.
581
582 void
583 operator=(const _Impl&); // Not defined.
584
585 bool
586 _M_check_same_name()
587 {
588 bool __ret = true;
589 if (_M_names[1])
590 // We must actually compare all the _M_names: can be all equal!
591 for (size_t __i = 0; __ret && __i < _S_categories_size - 1; ++__i)
592 __ret = __builtin_strcmp(_M_names[__i], _M_names[__i + 1]) == 0;
593 return __ret;
594 }
595
596 void
597 _M_replace_categories(const _Impl*, category);
598
599 void
600 _M_replace_category(const _Impl*, const locale::id* const*);
601
602 void
603 _M_replace_facet(const _Impl*, const locale::id*);
604
605 void
606 _M_install_facet(const locale::id*, const facet*);
607
608 template<typename _Facet>
609 void
610 _M_init_facet(_Facet* __facet)
611 { _M_install_facet(&_Facet::id, __facet); }
612
613 template<typename _Facet>
614 void
615 _M_init_facet_unchecked(_Facet* __facet)
616 {
617 __facet->_M_add_reference();
618 _M_facets[_Facet::id._M_id()] = __facet;
619 }
620
621 void
622 _M_install_cache(const facet*, size_t);
623
624 void _M_init_extra(facet**);
625 void _M_init_extra(void*, void*, const char*, const char*);
626 };
627
628
629 /**
630 * @brief Facet for localized string comparison.
631 *
632 * This facet encapsulates the code to compare strings in a localized
633 * manner.
634 *
635 * The collate template uses protected virtual functions to provide
636 * the actual results. The public accessors forward the call to
637 * the virtual functions. These virtual functions are hooks for
638 * developers to implement the behavior they require from the
639 * collate facet.
640 */
641 template<typename _CharT>
642 class _GLIBCXX_NAMESPACE_CXX11 collate : public locale::facet
643 {
644 public:
645 // Types:
646 //@{
647 /// Public typedefs
648 typedef _CharT char_type;
649 typedef basic_string<_CharT> string_type;
650 //@}
651
652 protected:
653 // Underlying "C" library locale information saved from
654 // initialization, needed by collate_byname as well.
655 __c_locale _M_c_locale_collate;
656
657 public:
658 /// Numpunct facet id.
659 static locale::id id;
660
661 /**
662 * @brief Constructor performs initialization.
663 *
664 * This is the constructor provided by the standard.
665 *
666 * @param __refs Passed to the base facet class.
667 */
668 explicit
669 collate(size_t __refs = 0)
670 : facet(__refs), _M_c_locale_collate(_S_get_c_locale())
671 { }
672
673 /**
674 * @brief Internal constructor. Not for general use.
675 *
676 * This is a constructor for use by the library itself to set up new
677 * locales.
678 *
679 * @param __cloc The C locale.
680 * @param __refs Passed to the base facet class.
681 */
682 explicit
683 collate(__c_locale __cloc, size_t __refs = 0)
684 : facet(__refs), _M_c_locale_collate(_S_clone_c_locale(__cloc))
685 { }
686
687 /**
688 * @brief Compare two strings.
689 *
690 * This function compares two strings and returns the result by calling
691 * collate::do_compare().
692 *
693 * @param __lo1 Start of string 1.
694 * @param __hi1 End of string 1.
695 * @param __lo2 Start of string 2.
696 * @param __hi2 End of string 2.
697 * @return 1 if string1 > string2, -1 if string1 < string2, else 0.
698 */
699 int
700 compare(const _CharT* __lo1, const _CharT* __hi1,
701 const _CharT* __lo2, const _CharT* __hi2) const
702 { return this->do_compare(__lo1, __hi1, __lo2, __hi2); }
703
704 /**
705 * @brief Transform string to comparable form.
706 *
707 * This function is a wrapper for strxfrm functionality. It takes the
708 * input string and returns a modified string that can be directly
709 * compared to other transformed strings. In the C locale, this
710 * function just returns a copy of the input string. In some other
711 * locales, it may replace two chars with one, change a char for
712 * another, etc. It does so by returning collate::do_transform().
713 *
714 * @param __lo Start of string.
715 * @param __hi End of string.
716 * @return Transformed string_type.
717 */
718 string_type
719 transform(const _CharT* __lo, const _CharT* __hi) const
720 { return this->do_transform(__lo, __hi); }
721
722 /**
723 * @brief Return hash of a string.
724 *
725 * This function computes and returns a hash on the input string. It
726 * does so by returning collate::do_hash().
727 *
728 * @param __lo Start of string.
729 * @param __hi End of string.
730 * @return Hash value.
731 */
732 long
733 hash(const _CharT* __lo, const _CharT* __hi) const
734 { return this->do_hash(__lo, __hi); }
735
736 // Used to abstract out _CharT bits in virtual member functions, below.
737 int
738 _M_compare(const _CharT*, const _CharT*) const throw();
739
740 size_t
741 _M_transform(_CharT*, const _CharT*, size_t) const throw();
742
743 protected:
744 /// Destructor.
745 virtual
746 ~collate()
747 { _S_destroy_c_locale(_M_c_locale_collate); }
748
749 /**
750 * @brief Compare two strings.
751 *
752 * This function is a hook for derived classes to change the value
753 * returned. @see compare().
754 *
755 * @param __lo1 Start of string 1.
756 * @param __hi1 End of string 1.
757 * @param __lo2 Start of string 2.
758 * @param __hi2 End of string 2.
759 * @return 1 if string1 > string2, -1 if string1 < string2, else 0.
760 */
761 virtual int
762 do_compare(const _CharT* __lo1, const _CharT* __hi1,
763 const _CharT* __lo2, const _CharT* __hi2) const;
764
765 /**
766 * @brief Transform string to comparable form.
767 *
768 * This function is a hook for derived classes to change the value
769 * returned.
770 *
771 * @param __lo Start.
772 * @param __hi End.
773 * @return transformed string.
774 */
775 virtual string_type
776 do_transform(const _CharT* __lo, const _CharT* __hi) const;
777
778 /**
779 * @brief Return hash of a string.
780 *
781 * This function computes and returns a hash on the input string. This
782 * function is a hook for derived classes to change the value returned.
783 *
784 * @param __lo Start of string.
785 * @param __hi End of string.
786 * @return Hash value.
787 */
788 virtual long
789 do_hash(const _CharT* __lo, const _CharT* __hi) const;
790 };
791
792 template<typename _CharT>
793 locale::id collate<_CharT>::id;
794
795 // Specializations.
796 template<>
797 int
798 collate<char>::_M_compare(const char*, const char*) const throw();
799
800 template<>
801 size_t
802 collate<char>::_M_transform(char*, const char*, size_t) const throw();
803
804#ifdef _GLIBCXX_USE_WCHAR_T
805 template<>
806 int
807 collate<wchar_t>::_M_compare(const wchar_t*, const wchar_t*) const throw();
808
809 template<>
810 size_t
811 collate<wchar_t>::_M_transform(wchar_t*, const wchar_t*, size_t) const throw();
812#endif
813
814 /// class collate_byname [22.2.4.2].
815 template<typename _CharT>
816 class _GLIBCXX_NAMESPACE_CXX11 collate_byname : public collate<_CharT>
817 {
818 public:
819 //@{
820 /// Public typedefs
821 typedef _CharT char_type;
822 typedef basic_string<_CharT> string_type;
823 //@}
824
825 explicit
826 collate_byname(const char* __s, size_t __refs = 0)
827 : collate<_CharT>(__refs)
828 {
829 if (__builtin_strcmp(__s, "C") != 0
830 && __builtin_strcmp(__s, "POSIX") != 0)
831 {
832 this->_S_destroy_c_locale(this->_M_c_locale_collate);
833 this->_S_create_c_locale(this->_M_c_locale_collate, __s);
834 }
835 }
836
837#if __cplusplus >= 201103L
838 explicit
839 collate_byname(const string& __s, size_t __refs = 0)
840 : collate_byname(__s.c_str(), __refs) { }
841#endif
842
843 protected:
844 virtual
845 ~collate_byname() { }
846 };
847
848_GLIBCXX_END_NAMESPACE_VERSION
849} // namespace
850
851# include <bits/locale_classes.tcc>
852
853#endif
854