libstdc++
locale_classes.h
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1 // Locale support -*- C++ -*-
2 
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4 //
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7 // terms of the GNU General Public License as published by the
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10 
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15 
16 // Under Section 7 of GPL version 3, you are granted additional
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19 
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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 
43 namespace 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 _Facet>
86  friend const _Facet*
87  __try_use_facet(const locale&) _GLIBCXX_NOTHROW;
88 
89  template<typename _Cache>
90  friend struct __use_cache;
91 
92  ///@{
93  /**
94  * @brief Category values.
95  *
96  * The standard category values are none, ctype, numeric, collate, time,
97  * monetary, and messages. They form a bitmask that supports union and
98  * intersection. The category all is the union of these values.
99  *
100  * NB: Order must match _S_facet_categories definition in locale.cc
101  */
102  static const category none = 0;
103  static const category ctype = 1L << 0;
104  static const category numeric = 1L << 1;
105  static const category collate = 1L << 2;
106  static const category time = 1L << 3;
107  static const category monetary = 1L << 4;
108  static const category messages = 1L << 5;
109  static const category all = (ctype | numeric | collate |
110  time | monetary | messages);
111  ///@}
112 
113  // Construct/copy/destroy:
114 
115  /**
116  * @brief Default constructor.
117  *
118  * Constructs a copy of the global locale. If no locale has been
119  * explicitly set, this is the C locale.
120  */
121  locale() throw();
122 
123  /**
124  * @brief Copy constructor.
125  *
126  * Constructs a copy of @a other.
127  *
128  * @param __other The locale to copy.
129  */
130  locale(const locale& __other) throw();
131 
132  /**
133  * @brief Named locale constructor.
134  *
135  * Constructs a copy of the named C library locale.
136  *
137  * @param __s Name of the locale to construct.
138  * @throw std::runtime_error if __s is null or an undefined locale.
139  */
140  explicit
141  locale(const char* __s);
142 
143  /**
144  * @brief Construct locale with facets from another locale.
145  *
146  * Constructs a copy of the locale @a base. The facets specified by @a
147  * cat are replaced with those from the locale named by @a s. If base is
148  * named, this locale instance will also be named.
149  *
150  * @param __base The locale to copy.
151  * @param __s Name of the locale to use facets from.
152  * @param __cat Set of categories defining the facets to use from __s.
153  * @throw std::runtime_error if __s is null or an undefined locale.
154  */
155  locale(const locale& __base, const char* __s, category __cat);
156 
157 #if __cplusplus >= 201103L
158  /**
159  * @brief Named locale constructor.
160  *
161  * Constructs a copy of the named C library locale.
162  *
163  * @param __s Name of the locale to construct.
164  * @throw std::runtime_error if __s is an undefined locale.
165  */
166  explicit
167  locale(const std::string& __s) : locale(__s.c_str()) { }
168 
169  /**
170  * @brief Construct locale with facets from another locale.
171  *
172  * Constructs a copy of the locale @a base. The facets specified by @a
173  * cat are replaced with those from the locale named by @a s. If base is
174  * named, this locale instance will also be named.
175  *
176  * @param __base The locale to copy.
177  * @param __s Name of the locale to use facets from.
178  * @param __cat Set of categories defining the facets to use from __s.
179  * @throw std::runtime_error if __s is an undefined locale.
180  */
181  locale(const locale& __base, const std::string& __s, category __cat)
182  : locale(__base, __s.c_str(), __cat) { }
183 #endif
184 
185  /**
186  * @brief Construct locale with facets from another locale.
187  *
188  * Constructs a copy of the locale @a base. The facets specified by @a
189  * cat are replaced with those from the locale @a add. If @a base and @a
190  * add are named, this locale instance will also be named.
191  *
192  * @param __base The locale to copy.
193  * @param __add The locale to use facets from.
194  * @param __cat Set of categories defining the facets to use from add.
195  */
196  locale(const locale& __base, const locale& __add, category __cat);
197 
198  /**
199  * @brief Construct locale with another facet.
200  *
201  * Constructs a copy of the locale @a __other. The facet @a __f
202  * is added to @a __other, replacing an existing facet of type
203  * Facet if there is one. If @a __f is null, this locale is a
204  * copy of @a __other.
205  *
206  * @param __other The locale to copy.
207  * @param __f The facet to add in.
208  */
209  template<typename _Facet>
210  locale(const locale& __other, _Facet* __f);
211 
212  /// Locale destructor.
213  ~locale() throw();
214 
215  /**
216  * @brief Assignment operator.
217  *
218  * Set this locale to be a copy of @a other.
219  *
220  * @param __other The locale to copy.
221  * @return A reference to this locale.
222  */
223  const locale&
224  operator=(const locale& __other) throw();
225 
226  /**
227  * @brief Construct locale with another facet.
228  *
229  * Constructs and returns a new copy of this locale. Adds or replaces an
230  * existing facet of type Facet from the locale @a other into the new
231  * locale.
232  *
233  * @tparam _Facet The facet type to copy from other
234  * @param __other The locale to copy from.
235  * @return Newly constructed locale.
236  * @throw std::runtime_error if __other has no facet of type _Facet.
237  */
238  template<typename _Facet>
239  locale
240  combine(const locale& __other) const;
241 
242  // Locale operations:
243  /**
244  * @brief Return locale name.
245  * @return Locale name or "*" if unnamed.
246  */
247  _GLIBCXX_DEFAULT_ABI_TAG
248  string
249  name() const;
250 
251  /**
252  * @brief Locale equality.
253  *
254  * @param __other The locale to compare against.
255  * @return True if other and this refer to the same locale instance, are
256  * copies, or have the same name. False otherwise.
257  */
258  bool
259  operator==(const locale& __other) const throw();
260 
261 #if __cpp_impl_three_way_comparison < 201907L
262  /**
263  * @brief Locale inequality.
264  *
265  * @param __other The locale to compare against.
266  * @return ! (*this == __other)
267  */
268  bool
269  operator!=(const locale& __other) const throw()
270  { return !(this->operator==(__other)); }
271 #endif
272 
273  /**
274  * @brief Compare two strings according to collate.
275  *
276  * Template operator to compare two strings using the compare function of
277  * the collate facet in this locale. One use is to provide the locale to
278  * the sort function. For example, a vector v of strings could be sorted
279  * according to locale loc by doing:
280  * @code
281  * std::sort(v.begin(), v.end(), loc);
282  * @endcode
283  *
284  * @param __s1 First string to compare.
285  * @param __s2 Second string to compare.
286  * @return True if collate<_Char> facet compares __s1 < __s2, else false.
287  */
288  template<typename _Char, typename _Traits, typename _Alloc>
289  bool
290  operator()(const basic_string<_Char, _Traits, _Alloc>& __s1,
291  const basic_string<_Char, _Traits, _Alloc>& __s2) const;
292 
293  // Global locale objects:
294  /**
295  * @brief Set global locale
296  *
297  * This function sets the global locale to the argument and returns a
298  * copy of the previous global locale. If the argument has a name, it
299  * will also call std::setlocale(LC_ALL, loc.name()).
300  *
301  * @param __loc The new locale to make global.
302  * @return Copy of the old global locale.
303  */
304  static locale
305  global(const locale& __loc);
306 
307  /**
308  * @brief Return reference to the C locale.
309  */
310  static const locale&
311  classic();
312 
313  private:
314  // The (shared) implementation
315  _Impl* _M_impl;
316 
317  // The "C" reference locale
318  static _Impl* _S_classic;
319 
320  // Current global locale
321  static _Impl* _S_global;
322 
323  // Names of underlying locale categories.
324  // NB: locale::global() has to know how to modify all the
325  // underlying categories, not just the ones required by the C++
326  // standard.
327  static const char* const* const _S_categories;
328 
329  // Number of standard categories. For C++, these categories are
330  // collate, ctype, monetary, numeric, time, and messages. These
331  // directly correspond to ISO C99 macros LC_COLLATE, LC_CTYPE,
332  // LC_MONETARY, LC_NUMERIC, and LC_TIME. In addition, POSIX (IEEE
333  // 1003.1-2001) specifies LC_MESSAGES.
334  // In addition to the standard categories, the underlying
335  // operating system is allowed to define extra LC_*
336  // macros. For GNU systems, the following are also valid:
337  // LC_PAPER, LC_NAME, LC_ADDRESS, LC_TELEPHONE, LC_MEASUREMENT,
338  // and LC_IDENTIFICATION.
339  enum { _S_categories_size = 6 + _GLIBCXX_NUM_CATEGORIES };
340 
341 #ifdef __GTHREADS
342  static __gthread_once_t _S_once;
343 #endif
344 
345  explicit
346  locale(_Impl*) throw();
347 
348  static void
349  _S_initialize();
350 
351  static void
352  _S_initialize_once() throw();
353 
354  static category
355  _S_normalize_category(category);
356 
357  void
358  _M_coalesce(const locale& __base, const locale& __add, category __cat);
359 
360 #if _GLIBCXX_USE_CXX11_ABI
361  static const id* const _S_twinned_facets[];
362 #endif
363  };
364 
365 
366  // 22.1.1.1.2 Class locale::facet
367  /**
368  * @brief Localization functionality base class.
369  * @ingroup locales
370  *
371  * The facet class is the base class for a localization feature, such as
372  * money, time, and number printing. It provides common support for facets
373  * and reference management.
374  *
375  * Facets may not be copied or assigned.
376  */
378  {
379  private:
380  friend class locale;
381  friend class locale::_Impl;
382 
383  mutable _Atomic_word _M_refcount;
384 
385  // Contains data from the underlying "C" library for the classic locale.
386  static __c_locale _S_c_locale;
387 
388  // String literal for the name of the classic locale.
389  static const char _S_c_name[2];
390 
391 #ifdef __GTHREADS
392  static __gthread_once_t _S_once;
393 #endif
394 
395  static void
396  _S_initialize_once();
397 
398  protected:
399  /**
400  * @brief Facet constructor.
401  *
402  * This is the constructor provided by the standard. If refs is 0, the
403  * facet is destroyed when the last referencing locale is destroyed.
404  * Otherwise the facet will never be destroyed.
405  *
406  * @param __refs The initial value for reference count.
407  */
408  explicit
409  facet(size_t __refs = 0) throw() : _M_refcount(__refs ? 1 : 0)
410  { }
411 
412  /// Facet destructor.
413  virtual
414  ~facet();
415 
416  static void
417  _S_create_c_locale(__c_locale& __cloc, const char* __s,
418  __c_locale __old = 0);
419 
420  static __c_locale
421  _S_clone_c_locale(__c_locale& __cloc) throw();
422 
423  static void
424  _S_destroy_c_locale(__c_locale& __cloc);
425 
426  static __c_locale
427  _S_lc_ctype_c_locale(__c_locale __cloc, const char* __s);
428 
429  // Returns data from the underlying "C" library data for the
430  // classic locale.
431  static __c_locale
432  _S_get_c_locale();
433 
434  _GLIBCXX_CONST static const char*
435  _S_get_c_name() throw();
436 
437 #if __cplusplus < 201103L
438  private:
439  facet(const facet&); // Not defined.
440 
441  facet&
442  operator=(const facet&); // Not defined.
443 #else
444  facet(const facet&) = delete;
445 
446  facet&
447  operator=(const facet&) = delete;
448 #endif
449 
450  private:
451  void
452  _M_add_reference() const throw()
453  { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); }
454 
455  void
456  _M_remove_reference() const throw()
457  {
458  // Be race-detector-friendly. For more info see bits/c++config.
459  _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_refcount);
460  if (__gnu_cxx::__exchange_and_add_dispatch(&_M_refcount, -1) == 1)
461  {
462  _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&_M_refcount);
463  __try
464  { delete this; }
465  __catch(...)
466  { }
467  }
468  }
469 
470  const facet* _M_sso_shim(const id*) const;
471  const facet* _M_cow_shim(const id*) const;
472 
473  protected:
474  class __shim; // For internal use only.
475  };
476 
477 
478  // 22.1.1.1.3 Class locale::id
479  /**
480  * @brief Facet ID class.
481  * @ingroup locales
482  *
483  * The ID class provides facets with an index used to identify them.
484  * Every facet class must define a public static member locale::id, or be
485  * derived from a facet that provides this member, otherwise the facet
486  * cannot be used in a locale. The locale::id ensures that each class
487  * type gets a unique identifier.
488  */
490  {
491  private:
492  friend class locale;
493  friend class locale::_Impl;
494 
495  template<typename _Facet>
496  friend const _Facet&
497  use_facet(const locale&);
498 
499  template<typename _Facet>
500  friend bool
501  has_facet(const locale&) throw();
502 
503  template<typename _Facet>
504  friend const _Facet*
505  __try_use_facet(const locale&) _GLIBCXX_NOTHROW;
506 
507  // NB: There is no accessor for _M_index because it may be used
508  // before the constructor is run; the effect of calling a member
509  // function (even an inline) would be undefined.
510  mutable size_t _M_index;
511 
512  // Last id number assigned.
513  static _Atomic_word _S_refcount;
514 
515  void
516  operator=(const id&); // Not defined.
517 
518  id(const id&); // Not defined.
519 
520  public:
521  // NB: This class is always a static data member, and thus can be
522  // counted on to be zero-initialized.
523  /// Constructor.
524  id() { }
525 
526  size_t
527  _M_id() const throw();
528  };
529 
530 
531  // Implementation object for locale.
532  class locale::_Impl
533  {
534  public:
535  // Friends.
536  friend class locale;
537  friend class locale::facet;
538 
539  template<typename _Facet>
540  friend bool
541  has_facet(const locale&) throw();
542 
543  template<typename _Facet>
544  friend const _Facet&
545  use_facet(const locale&);
546 
547  template<typename _Facet>
548  friend const _Facet*
549  __try_use_facet(const locale&) _GLIBCXX_NOTHROW;
550 
551  template<typename _Cache>
552  friend struct __use_cache;
553 
554  private:
555  // Data Members.
556  _Atomic_word _M_refcount;
557  const facet** _M_facets;
558  size_t _M_facets_size;
559  const facet** _M_caches;
560  char** _M_names;
561  static const locale::id* const _S_id_ctype[];
562  static const locale::id* const _S_id_numeric[];
563  static const locale::id* const _S_id_collate[];
564  static const locale::id* const _S_id_time[];
565  static const locale::id* const _S_id_monetary[];
566  static const locale::id* const _S_id_messages[];
567  static const locale::id* const* const _S_facet_categories[];
568 
569  void
570  _M_add_reference() throw()
571  { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); }
572 
573  void
574  _M_remove_reference() throw()
575  {
576  // Be race-detector-friendly. For more info see bits/c++config.
577  _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_refcount);
578  if (__gnu_cxx::__exchange_and_add_dispatch(&_M_refcount, -1) == 1)
579  {
580  _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&_M_refcount);
581  __try
582  { delete this; }
583  __catch(...)
584  { }
585  }
586  }
587 
588  _Impl(const _Impl&, size_t);
589  _Impl(const char*, size_t);
590  _Impl(size_t) throw();
591 
592  ~_Impl() throw();
593 
594  _Impl(const _Impl&); // Not defined.
595 
596  void
597  operator=(const _Impl&); // Not defined.
598 
599  bool
600  _M_check_same_name()
601  {
602  bool __ret = true;
603  if (_M_names[1])
604  // We must actually compare all the _M_names: can be all equal!
605  for (size_t __i = 0; __ret && __i < _S_categories_size - 1; ++__i)
606  __ret = __builtin_strcmp(_M_names[__i], _M_names[__i + 1]) == 0;
607  return __ret;
608  }
609 
610  void
611  _M_replace_categories(const _Impl*, category);
612 
613  void
614  _M_replace_category(const _Impl*, const locale::id* const*);
615 
616  void
617  _M_replace_facet(const _Impl*, const locale::id*);
618 
619  void
620  _M_install_facet(const locale::id*, const facet*);
621 
622  template<typename _Facet>
623  void
624  _M_init_facet(_Facet* __facet)
625  { _M_install_facet(&_Facet::id, __facet); }
626 
627  template<typename _Facet>
628  void
629  _M_init_facet_unchecked(_Facet* __facet)
630  {
631  __facet->_M_add_reference();
632  _M_facets[_Facet::id._M_id()] = __facet;
633  }
634 
635  void
636  _M_install_cache(const facet*, size_t);
637 
638  void _M_init_extra(facet**);
639  void _M_init_extra(void*, void*, const char*, const char*);
640 
641 #ifdef _GLIBCXX_LONG_DOUBLE_ALT128_COMPAT
642  void _M_init_extra_ldbl128(bool);
643 #endif
644  };
645 
646 
647  /**
648  * @brief Facet for localized string comparison.
649  *
650  * This facet encapsulates the code to compare strings in a localized
651  * manner.
652  *
653  * The collate template uses protected virtual functions to provide
654  * the actual results. The public accessors forward the call to
655  * the virtual functions. These virtual functions are hooks for
656  * developers to implement the behavior they require from the
657  * collate facet.
658  */
659  template<typename _CharT>
660  class _GLIBCXX_NAMESPACE_CXX11 collate : public locale::facet
661  {
662  public:
663  // Types:
664  ///@{
665  /// Public typedefs
666  typedef _CharT char_type;
668  ///@}
669 
670  protected:
671  // Underlying "C" library locale information saved from
672  // initialization, needed by collate_byname as well.
673  __c_locale _M_c_locale_collate;
674 
675  public:
676  /// Numpunct facet id.
677  static locale::id id;
678 
679  /**
680  * @brief Constructor performs initialization.
681  *
682  * This is the constructor provided by the standard.
683  *
684  * @param __refs Passed to the base facet class.
685  */
686  explicit
687  collate(size_t __refs = 0)
688  : facet(__refs), _M_c_locale_collate(_S_get_c_locale())
689  { }
690 
691  /**
692  * @brief Internal constructor. Not for general use.
693  *
694  * This is a constructor for use by the library itself to set up new
695  * locales.
696  *
697  * @param __cloc The C locale.
698  * @param __refs Passed to the base facet class.
699  */
700  explicit
701  collate(__c_locale __cloc, size_t __refs = 0)
702  : facet(__refs), _M_c_locale_collate(_S_clone_c_locale(__cloc))
703  { }
704 
705  /**
706  * @brief Compare two strings.
707  *
708  * This function compares two strings and returns the result by calling
709  * collate::do_compare().
710  *
711  * @param __lo1 Start of string 1.
712  * @param __hi1 End of string 1.
713  * @param __lo2 Start of string 2.
714  * @param __hi2 End of string 2.
715  * @return 1 if string1 > string2, -1 if string1 < string2, else 0.
716  */
717  int
718  compare(const _CharT* __lo1, const _CharT* __hi1,
719  const _CharT* __lo2, const _CharT* __hi2) const
720  { return this->do_compare(__lo1, __hi1, __lo2, __hi2); }
721 
722  /**
723  * @brief Transform string to comparable form.
724  *
725  * This function is a wrapper for strxfrm functionality. It takes the
726  * input string and returns a modified string that can be directly
727  * compared to other transformed strings. In the C locale, this
728  * function just returns a copy of the input string. In some other
729  * locales, it may replace two chars with one, change a char for
730  * another, etc. It does so by returning collate::do_transform().
731  *
732  * @param __lo Start of string.
733  * @param __hi End of string.
734  * @return Transformed string_type.
735  */
736  string_type
737  transform(const _CharT* __lo, const _CharT* __hi) const
738  { return this->do_transform(__lo, __hi); }
739 
740  /**
741  * @brief Return hash of a string.
742  *
743  * This function computes and returns a hash on the input string. It
744  * does so by returning collate::do_hash().
745  *
746  * @param __lo Start of string.
747  * @param __hi End of string.
748  * @return Hash value.
749  */
750  long
751  hash(const _CharT* __lo, const _CharT* __hi) const
752  { return this->do_hash(__lo, __hi); }
753 
754  // Used to abstract out _CharT bits in virtual member functions, below.
755  int
756  _M_compare(const _CharT*, const _CharT*) const throw();
757 
758  size_t
759  _M_transform(_CharT*, const _CharT*, size_t) const throw();
760 
761  protected:
762  /// Destructor.
763  virtual
765  { _S_destroy_c_locale(_M_c_locale_collate); }
766 
767  /**
768  * @brief Compare two strings.
769  *
770  * This function is a hook for derived classes to change the value
771  * returned. @see compare().
772  *
773  * @param __lo1 Start of string 1.
774  * @param __hi1 End of string 1.
775  * @param __lo2 Start of string 2.
776  * @param __hi2 End of string 2.
777  * @return 1 if string1 > string2, -1 if string1 < string2, else 0.
778  */
779  virtual int
780  do_compare(const _CharT* __lo1, const _CharT* __hi1,
781  const _CharT* __lo2, const _CharT* __hi2) const;
782 
783  /**
784  * @brief Transform string to comparable form.
785  *
786  * This function is a hook for derived classes to change the value
787  * returned.
788  *
789  * @param __lo Start.
790  * @param __hi End.
791  * @return transformed string.
792  */
793  virtual string_type
794  do_transform(const _CharT* __lo, const _CharT* __hi) const;
795 
796  /**
797  * @brief Return hash of a string.
798  *
799  * This function computes and returns a hash on the input string. This
800  * function is a hook for derived classes to change the value returned.
801  *
802  * @param __lo Start of string.
803  * @param __hi End of string.
804  * @return Hash value.
805  */
806  virtual long
807  do_hash(const _CharT* __lo, const _CharT* __hi) const;
808  };
809 
810  template<typename _CharT>
811  locale::id collate<_CharT>::id;
812 
813  // Specializations.
814  template<>
815  int
816  collate<char>::_M_compare(const char*, const char*) const throw();
817 
818  template<>
819  size_t
820  collate<char>::_M_transform(char*, const char*, size_t) const throw();
821 
822 #ifdef _GLIBCXX_USE_WCHAR_T
823  template<>
824  int
825  collate<wchar_t>::_M_compare(const wchar_t*, const wchar_t*) const throw();
826 
827  template<>
828  size_t
829  collate<wchar_t>::_M_transform(wchar_t*, const wchar_t*, size_t) const throw();
830 #endif
831 
832  /// class collate_byname [22.2.4.2].
833  template<typename _CharT>
834  class _GLIBCXX_NAMESPACE_CXX11 collate_byname : public collate<_CharT>
835  {
836  public:
837  ///@{
838  /// Public typedefs
839  typedef _CharT char_type;
841  ///@}
842 
843  explicit
844  collate_byname(const char* __s, size_t __refs = 0)
845  : collate<_CharT>(__refs)
846  {
847  if (__builtin_strcmp(__s, "C") != 0
848  && __builtin_strcmp(__s, "POSIX") != 0)
849  {
850  this->_S_destroy_c_locale(this->_M_c_locale_collate);
851  this->_S_create_c_locale(this->_M_c_locale_collate, __s);
852  }
853  }
854 
855 #if __cplusplus >= 201103L
856  explicit
857  collate_byname(const string& __s, size_t __refs = 0)
858  : collate_byname(__s.c_str(), __refs) { }
859 #endif
860 
861  protected:
862  virtual
863  ~collate_byname() { }
864  };
865 
866 _GLIBCXX_END_NAMESPACE_VERSION
867 } // namespace
868 
869 # include <bits/locale_classes.tcc>
870 
871 #endif
std::locale::all
static const category all
Category values.
Definition: locale_classes.h:109
string
std::collate::collate
collate(__c_locale __cloc, size_t __refs=0)
Internal constructor. Not for general use.
Definition: locale_classes.h:701
atomicity.h
std::locale::numeric
static const category numeric
Category values.
Definition: locale_classes.h:104
std::locale::global
static locale global(const locale &__loc)
Set global locale.
std::locale
Container class for localization functionality.
Definition: locale_classes.h:62
std::locale::monetary
static const category monetary
Category values.
Definition: locale_classes.h:107
std::collate_byname::char_type
_CharT char_type
Public typedefs.
Definition: locale_classes.h:839
std::locale::facet::~facet
virtual ~facet()
Facet destructor.
std::locale::none
static const category none
Category values.
Definition: locale_classes.h:102
std::collate
Facet for localized string comparison.
Definition: locale_classes.h:660
std::locale::combine
locale combine(const locale &__other) const
Construct locale with another facet.
Definition: locale_classes.tcc:63
std::collate::transform
string_type transform(const _CharT *__lo, const _CharT *__hi) const
Transform string to comparable form.
Definition: locale_classes.h:737
std::collate::string_type
basic_string< _CharT > string_type
Public typedefs.
Definition: locale_classes.h:667
std::locale::messages
static const category messages
Category values.
Definition: locale_classes.h:108
std::locale::id
Facet ID class.
Definition: locale_classes.h:489
std::locale::has_facet
friend bool has_facet(const locale &)
Test for the presence of a facet.
Definition: locale_classes.tcc:163
std::collate::~collate
virtual ~collate()
Destructor.
Definition: locale_classes.h:764
std::locale::classic
static const locale & classic()
Return reference to the C locale.
std::collate::hash
long hash(const _CharT *__lo, const _CharT *__hi) const
Return hash of a string.
Definition: locale_classes.h:751
std::locale::time
static const category time
Category values.
Definition: locale_classes.h:106
std::collate::compare
int compare(const _CharT *__lo1, const _CharT *__hi1, const _CharT *__lo2, const _CharT *__hi2) const
Compare two strings.
Definition: locale_classes.h:718
std::messages
Primary class template messages.
Definition: locale_facets_nonio.h:1853
std::locale::use_facet
const friend _Facet & use_facet(const locale &)
Return a facet.
Definition: locale_classes.tcc:192
std::locale::operator()
bool operator()(const basic_string< _Char, _Traits, _Alloc > &__s1, const basic_string< _Char, _Traits, _Alloc > &__s2) const
Compare two strings according to collate.
std::collate_byname::string_type
basic_string< _CharT > string_type
Public typedefs.
Definition: locale_classes.h:840
std::ctype
Primary class template ctype facet.
Definition: locale_facets.h:615
std::locale::operator==
bool operator==(const locale &__other) const
Locale equality.
std::locale::locale
locale(const std::string &__s)
Named locale constructor.
Definition: locale_classes.h:167
std::collate::id
static locale::id id
Numpunct facet id.
Definition: locale_classes.h:677
std::basic_string< char >
locale_classes.tcc
std::locale::locale
locale()
Default constructor.
__gnu_debug::__base
constexpr _Iterator __base(_Iterator __it)
Definition: helper_functions.h:306
std::locale::id::use_facet
const friend _Facet & use_facet(const locale &)
Return a facet.
Definition: locale_classes.tcc:192
std::locale::id::has_facet
friend bool has_facet(const locale &)
Test for the presence of a facet.
Definition: locale_classes.tcc:163
std::locale::facet::facet
facet(size_t __refs=0)
Facet constructor.
Definition: locale_classes.h:409
std::locale::~locale
~locale()
Locale destructor.
std::locale::facet
Localization functionality base class.
Definition: locale_classes.h:377
localefwd.h
std
ISO C++ entities toplevel namespace is std.
std::locale::name
string name() const
Return locale name.
std::collate::collate
collate(size_t __refs=0)
Constructor performs initialization.
Definition: locale_classes.h:687
std::collate::char_type
_CharT char_type
Public typedefs.
Definition: locale_classes.h:666
std::locale::locale
locale(const locale &__base, const std::string &__s, category __cat)
Construct locale with facets from another locale.
Definition: locale_classes.h:181
std::locale::category
int category
Definition of locale::category.
Definition: locale_classes.h:67
std::locale::id::id
id()
Constructor.
Definition: locale_classes.h:524
std::collate_byname
class collate_byname [22.2.4.2].
Definition: locale_classes.h:834