libstdc++
locale_classes.h
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1 // Locale support -*- C++ -*-
2 
3 // Copyright (C) 1997-2015 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
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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 
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 _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
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  */
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  private:
432  void
433  _M_add_reference() const throw()
434  { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); }
435 
436  void
437  _M_remove_reference() const throw()
438  {
439  // Be race-detector-friendly. For more info see bits/c++config.
440  _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_refcount);
441  if (__gnu_cxx::__exchange_and_add_dispatch(&_M_refcount, -1) == 1)
442  {
443  _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&_M_refcount);
444  __try
445  { delete this; }
446  __catch(...)
447  { }
448  }
449  }
450 
451  facet(const facet&); // Not defined.
452 
453  facet&
454  operator=(const facet&); // Not defined.
455 
456  class __shim;
457 
458  const facet* _M_sso_shim(const id*) const;
459  const facet* _M_cow_shim(const id*) const;
460  };
461 
462 
463  // 22.1.1.1.3 Class locale::id
464  /**
465  * @brief Facet ID class.
466  * @ingroup locales
467  *
468  * The ID class provides facets with an index used to identify them.
469  * Every facet class must define a public static member locale::id, or be
470  * derived from a facet that provides this member, otherwise the facet
471  * cannot be used in a locale. The locale::id ensures that each class
472  * type gets a unique identifier.
473  */
475  {
476  private:
477  friend class locale;
478  friend class locale::_Impl;
479 
480  template<typename _Facet>
481  friend const _Facet&
482  use_facet(const locale&);
483 
484  template<typename _Facet>
485  friend bool
486  has_facet(const locale&) throw();
487 
488  // NB: There is no accessor for _M_index because it may be used
489  // before the constructor is run; the effect of calling a member
490  // function (even an inline) would be undefined.
491  mutable size_t _M_index;
492 
493  // Last id number assigned.
494  static _Atomic_word _S_refcount;
495 
496  void
497  operator=(const id&); // Not defined.
498 
499  id(const id&); // Not defined.
500 
501  public:
502  // NB: This class is always a static data member, and thus can be
503  // counted on to be zero-initialized.
504  /// Constructor.
505  id() { }
506 
507  size_t
508  _M_id() const throw();
509  };
510 
511 
512  // Implementation object for locale.
513  class locale::_Impl
514  {
515  public:
516  // Friends.
517  friend class locale;
518  friend class locale::facet;
519 
520  template<typename _Facet>
521  friend bool
522  has_facet(const locale&) throw();
523 
524  template<typename _Facet>
525  friend const _Facet&
526  use_facet(const locale&);
527 
528  template<typename _Cache>
529  friend struct __use_cache;
530 
531  private:
532  // Data Members.
533  _Atomic_word _M_refcount;
534  const facet** _M_facets;
535  size_t _M_facets_size;
536  const facet** _M_caches;
537  char** _M_names;
538  static const locale::id* const _S_id_ctype[];
539  static const locale::id* const _S_id_numeric[];
540  static const locale::id* const _S_id_collate[];
541  static const locale::id* const _S_id_time[];
542  static const locale::id* const _S_id_monetary[];
543  static const locale::id* const _S_id_messages[];
544  static const locale::id* const* const _S_facet_categories[];
545 
546  void
547  _M_add_reference() throw()
548  { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); }
549 
550  void
551  _M_remove_reference() throw()
552  {
553  // Be race-detector-friendly. For more info see bits/c++config.
554  _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_refcount);
555  if (__gnu_cxx::__exchange_and_add_dispatch(&_M_refcount, -1) == 1)
556  {
557  _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&_M_refcount);
558  __try
559  { delete this; }
560  __catch(...)
561  { }
562  }
563  }
564 
565  _Impl(const _Impl&, size_t);
566  _Impl(const char*, size_t);
567  _Impl(size_t) throw();
568 
569  ~_Impl() throw();
570 
571  _Impl(const _Impl&); // Not defined.
572 
573  void
574  operator=(const _Impl&); // Not defined.
575 
576  bool
577  _M_check_same_name()
578  {
579  bool __ret = true;
580  if (_M_names[1])
581  // We must actually compare all the _M_names: can be all equal!
582  for (size_t __i = 0; __ret && __i < _S_categories_size - 1; ++__i)
583  __ret = __builtin_strcmp(_M_names[__i], _M_names[__i + 1]) == 0;
584  return __ret;
585  }
586 
587  void
588  _M_replace_categories(const _Impl*, category);
589 
590  void
591  _M_replace_category(const _Impl*, const locale::id* const*);
592 
593  void
594  _M_replace_facet(const _Impl*, const locale::id*);
595 
596  void
597  _M_install_facet(const locale::id*, const facet*);
598 
599  template<typename _Facet>
600  void
601  _M_init_facet(_Facet* __facet)
602  { _M_install_facet(&_Facet::id, __facet); }
603 
604  template<typename _Facet>
605  void
606  _M_init_facet_unchecked(_Facet* __facet)
607  {
608  __facet->_M_add_reference();
609  _M_facets[_Facet::id._M_id()] = __facet;
610  }
611 
612  void
613  _M_install_cache(const facet*, size_t);
614 
615  void _M_init_extra(facet**);
616  void _M_init_extra(void*, void*, const char*, const char*);
617  };
618 
619 
620  /**
621  * @brief Facet for localized string comparison.
622  *
623  * This facet encapsulates the code to compare strings in a localized
624  * manner.
625  *
626  * The collate template uses protected virtual functions to provide
627  * the actual results. The public accessors forward the call to
628  * the virtual functions. These virtual functions are hooks for
629  * developers to implement the behavior they require from the
630  * collate facet.
631  */
632  template<typename _CharT>
633  class _GLIBCXX_NAMESPACE_CXX11 collate : public locale::facet
634  {
635  public:
636  // Types:
637  //@{
638  /// Public typedefs
639  typedef _CharT char_type;
641  //@}
642 
643  protected:
644  // Underlying "C" library locale information saved from
645  // initialization, needed by collate_byname as well.
646  __c_locale _M_c_locale_collate;
647 
648  public:
649  /// Numpunct facet id.
650  static locale::id id;
651 
652  /**
653  * @brief Constructor performs initialization.
654  *
655  * This is the constructor provided by the standard.
656  *
657  * @param __refs Passed to the base facet class.
658  */
659  explicit
660  collate(size_t __refs = 0)
661  : facet(__refs), _M_c_locale_collate(_S_get_c_locale())
662  { }
663 
664  /**
665  * @brief Internal constructor. Not for general use.
666  *
667  * This is a constructor for use by the library itself to set up new
668  * locales.
669  *
670  * @param __cloc The C locale.
671  * @param __refs Passed to the base facet class.
672  */
673  explicit
674  collate(__c_locale __cloc, size_t __refs = 0)
675  : facet(__refs), _M_c_locale_collate(_S_clone_c_locale(__cloc))
676  { }
677 
678  /**
679  * @brief Compare two strings.
680  *
681  * This function compares two strings and returns the result by calling
682  * collate::do_compare().
683  *
684  * @param __lo1 Start of string 1.
685  * @param __hi1 End of string 1.
686  * @param __lo2 Start of string 2.
687  * @param __hi2 End of string 2.
688  * @return 1 if string1 > string2, -1 if string1 < string2, else 0.
689  */
690  int
691  compare(const _CharT* __lo1, const _CharT* __hi1,
692  const _CharT* __lo2, const _CharT* __hi2) const
693  { return this->do_compare(__lo1, __hi1, __lo2, __hi2); }
694 
695  /**
696  * @brief Transform string to comparable form.
697  *
698  * This function is a wrapper for strxfrm functionality. It takes the
699  * input string and returns a modified string that can be directly
700  * compared to other transformed strings. In the C locale, this
701  * function just returns a copy of the input string. In some other
702  * locales, it may replace two chars with one, change a char for
703  * another, etc. It does so by returning collate::do_transform().
704  *
705  * @param __lo Start of string.
706  * @param __hi End of string.
707  * @return Transformed string_type.
708  */
709  string_type
710  transform(const _CharT* __lo, const _CharT* __hi) const
711  { return this->do_transform(__lo, __hi); }
712 
713  /**
714  * @brief Return hash of a string.
715  *
716  * This function computes and returns a hash on the input string. It
717  * does so by returning collate::do_hash().
718  *
719  * @param __lo Start of string.
720  * @param __hi End of string.
721  * @return Hash value.
722  */
723  long
724  hash(const _CharT* __lo, const _CharT* __hi) const
725  { return this->do_hash(__lo, __hi); }
726 
727  // Used to abstract out _CharT bits in virtual member functions, below.
728  int
729  _M_compare(const _CharT*, const _CharT*) const throw();
730 
731  size_t
732  _M_transform(_CharT*, const _CharT*, size_t) const throw();
733 
734  protected:
735  /// Destructor.
736  virtual
738  { _S_destroy_c_locale(_M_c_locale_collate); }
739 
740  /**
741  * @brief Compare two strings.
742  *
743  * This function is a hook for derived classes to change the value
744  * returned. @see compare().
745  *
746  * @param __lo1 Start of string 1.
747  * @param __hi1 End of string 1.
748  * @param __lo2 Start of string 2.
749  * @param __hi2 End of string 2.
750  * @return 1 if string1 > string2, -1 if string1 < string2, else 0.
751  */
752  virtual int
753  do_compare(const _CharT* __lo1, const _CharT* __hi1,
754  const _CharT* __lo2, const _CharT* __hi2) const;
755 
756  /**
757  * @brief Transform string to comparable form.
758  *
759  * This function is a hook for derived classes to change the value
760  * returned.
761  *
762  * @param __lo Start.
763  * @param __hi End.
764  * @return transformed string.
765  */
766  virtual string_type
767  do_transform(const _CharT* __lo, const _CharT* __hi) const;
768 
769  /**
770  * @brief Return hash of a string.
771  *
772  * This function computes and returns a hash on the input string. This
773  * function is a hook for derived classes to change the value returned.
774  *
775  * @param __lo Start of string.
776  * @param __hi End of string.
777  * @return Hash value.
778  */
779  virtual long
780  do_hash(const _CharT* __lo, const _CharT* __hi) const;
781  };
782 
783  template<typename _CharT>
784  locale::id collate<_CharT>::id;
785 
786  // Specializations.
787  template<>
788  int
789  collate<char>::_M_compare(const char*, const char*) const throw();
790 
791  template<>
792  size_t
793  collate<char>::_M_transform(char*, const char*, size_t) const throw();
794 
795 #ifdef _GLIBCXX_USE_WCHAR_T
796  template<>
797  int
798  collate<wchar_t>::_M_compare(const wchar_t*, const wchar_t*) const throw();
799 
800  template<>
801  size_t
802  collate<wchar_t>::_M_transform(wchar_t*, const wchar_t*, size_t) const throw();
803 #endif
804 
805  /// class collate_byname [22.2.4.2].
806  template<typename _CharT>
807  class _GLIBCXX_NAMESPACE_CXX11 collate_byname : public collate<_CharT>
808  {
809  public:
810  //@{
811  /// Public typedefs
812  typedef _CharT char_type;
814  //@}
815 
816  explicit
817  collate_byname(const char* __s, size_t __refs = 0)
818  : collate<_CharT>(__refs)
819  {
820  if (__builtin_strcmp(__s, "C") != 0
821  && __builtin_strcmp(__s, "POSIX") != 0)
822  {
823  this->_S_destroy_c_locale(this->_M_c_locale_collate);
824  this->_S_create_c_locale(this->_M_c_locale_collate, __s);
825  }
826  }
827 
828 #if __cplusplus >= 201103L
829  explicit
830  collate_byname(const string& __s, size_t __refs = 0)
831  : collate_byname(__s.c_str(), __refs) { }
832 #endif
833 
834  protected:
835  virtual
836  ~collate_byname() { }
837  };
838 
839 _GLIBCXX_END_NAMESPACE_VERSION
840 } // namespace
841 
842 # include <bits/locale_classes.tcc>
843 
844 #endif
static const category collate
Category values.
basic_string< _CharT > string_type
Public typedefs.
id()
Constructor.
Facet for localized string comparison.
string_type transform(const _CharT *__lo, const _CharT *__hi) const
Transform string to comparable form.
Container class for localization functionality.The locale class is first a class wrapper for C librar...
locale combine(const locale &__other) const
Construct locale with another facet.
locale(const locale &__base, const std::string &__s, category __cat)
Construct locale with facets from another locale.
static const category monetary
Category values.
bool operator()(const basic_string< _Char, _Traits, _Alloc > &__s1, const basic_string< _Char, _Traits, _Alloc > &__s2) const
Compare two strings according to collate.
Primary class template ctype facet.This template class defines classification and conversion function...
friend const _Facet & use_facet(const locale &)
Return a facet.use_facet looks for and returns a reference to a facet of type Facet where Facet is th...
~locale()
Locale destructor.
static const category numeric
Category values.
static locale global(const locale &__loc)
Set global locale.
Primary class template messages.This facet encapsulates the code to retrieve messages from message ca...
locale()
Default constructor.
locale(const std::string &__s)
Named locale constructor.
int compare(const _CharT *__lo1, const _CharT *__hi1, const _CharT *__lo2, const _CharT *__hi2) const
Compare two strings.
basic_string< _CharT > string_type
Public typedefs.
static const locale & classic()
Return reference to the C locale.
Facet ID class.The ID class provides facets with an index used to identify them. Every facet class mu...
long hash(const _CharT *__lo, const _CharT *__hi) const
Return hash of a string.
friend bool has_facet(const locale &)
Test for the presence of a facet.has_facet tests the locale argument for the presence of the facet ty...
_GLIBCXX_DEFAULT_ABI_TAG string name() const
Return locale name.
static const category all
Category values.
collate(size_t __refs=0)
Constructor performs initialization.
static const category time
Category values.
friend bool has_facet(const locale &)
Test for the presence of a facet.has_facet tests the locale argument for the presence of the facet ty...
facet(size_t __refs=0)
Facet constructor.
_CharT char_type
Public typedefs.
collate(__c_locale __cloc, size_t __refs=0)
Internal constructor. Not for general use.
class collate_byname [22.2.4.2].
Localization functionality base class.The facet class is the base class for a localization feature...
friend const _Facet & use_facet(const locale &)
Return a facet.use_facet looks for and returns a reference to a facet of type Facet where Facet is th...
static const category none
Category values.
static locale::id id
Numpunct facet id.
int category
Definition of locale::category.
virtual ~facet()
Facet destructor.
_CharT char_type
Public typedefs.
bool operator==(const locale &__other) const
Locale equality.
_Siter_base< _Iterator >::iterator_type __base(_Iterator __it)
Definition: functions.h:558