libstdc++
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00001 // Locale support -*- C++ -*- 00002 00003 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 00004 // 2006, 2007, 2008, 2009, 2010, 2011 00005 // Free Software Foundation, Inc. 00006 // 00007 // This file is part of the GNU ISO C++ Library. This library is free 00008 // software; you can redistribute it and/or modify it under the 00009 // terms of the GNU General Public License as published by the 00010 // Free Software Foundation; either version 3, or (at your option) 00011 // any later version. 00012 00013 // This library is distributed in the hope that it will be useful, 00014 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00016 // GNU General Public License for more details. 00017 00018 // Under Section 7 of GPL version 3, you are granted additional 00019 // permissions described in the GCC Runtime Library Exception, version 00020 // 3.1, as published by the Free Software Foundation. 00021 00022 // You should have received a copy of the GNU General Public License and 00023 // a copy of the GCC Runtime Library Exception along with this program; 00024 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00025 // <http://www.gnu.org/licenses/>. 00026 00027 /** @file bits/locale_classes.h 00028 * This is an internal header file, included by other library headers. 00029 * Do not attempt to use it directly. @headername{locale} 00030 */ 00031 00032 // 00033 // ISO C++ 14882: 22.1 Locales 00034 // 00035 00036 #ifndef _LOCALE_CLASSES_H 00037 #define _LOCALE_CLASSES_H 1 00038 00039 #pragma GCC system_header 00040 00041 #include <bits/localefwd.h> 00042 #include <string> 00043 #include <ext/atomicity.h> 00044 00045 namespace std _GLIBCXX_VISIBILITY(default) 00046 { 00047 _GLIBCXX_BEGIN_NAMESPACE_VERSION 00048 00049 // 22.1.1 Class locale 00050 /** 00051 * @brief Container class for localization functionality. 00052 * @ingroup locales 00053 * 00054 * The locale class is first a class wrapper for C library locales. It is 00055 * also an extensible container for user-defined localization. A locale is 00056 * a collection of facets that implement various localization features such 00057 * as money, time, and number printing. 00058 * 00059 * Constructing C++ locales does not change the C library locale. 00060 * 00061 * This library supports efficient construction and copying of locales 00062 * through a reference counting implementation of the locale class. 00063 */ 00064 class locale 00065 { 00066 public: 00067 // Types: 00068 /// Definition of locale::category. 00069 typedef int category; 00070 00071 // Forward decls and friends: 00072 class facet; 00073 class id; 00074 class _Impl; 00075 00076 friend class facet; 00077 friend class _Impl; 00078 00079 template<typename _Facet> 00080 friend bool 00081 has_facet(const locale&) throw(); 00082 00083 template<typename _Facet> 00084 friend const _Facet& 00085 use_facet(const locale&); 00086 00087 template<typename _Cache> 00088 friend struct __use_cache; 00089 00090 //@{ 00091 /** 00092 * @brief Category values. 00093 * 00094 * The standard category values are none, ctype, numeric, collate, time, 00095 * monetary, and messages. They form a bitmask that supports union and 00096 * intersection. The category all is the union of these values. 00097 * 00098 * NB: Order must match _S_facet_categories definition in locale.cc 00099 */ 00100 static const category none = 0; 00101 static const category ctype = 1L << 0; 00102 static const category numeric = 1L << 1; 00103 static const category collate = 1L << 2; 00104 static const category time = 1L << 3; 00105 static const category monetary = 1L << 4; 00106 static const category messages = 1L << 5; 00107 static const category all = (ctype | numeric | collate | 00108 time | monetary | messages); 00109 //@} 00110 00111 // Construct/copy/destroy: 00112 00113 /** 00114 * @brief Default constructor. 00115 * 00116 * Constructs a copy of the global locale. If no locale has been 00117 * explicitly set, this is the C locale. 00118 */ 00119 locale() throw(); 00120 00121 /** 00122 * @brief Copy constructor. 00123 * 00124 * Constructs a copy of @a other. 00125 * 00126 * @param __other The locale to copy. 00127 */ 00128 locale(const locale& __other) throw(); 00129 00130 /** 00131 * @brief Named locale constructor. 00132 * 00133 * Constructs a copy of the named C library locale. 00134 * 00135 * @param __s Name of the locale to construct. 00136 * @throw std::runtime_error if __s is null or an undefined locale. 00137 */ 00138 explicit 00139 locale(const char* __s); 00140 00141 /** 00142 * @brief Construct locale with facets from another locale. 00143 * 00144 * Constructs a copy of the locale @a base. The facets specified by @a 00145 * cat are replaced with those from the locale named by @a s. If base is 00146 * named, this locale instance will also be named. 00147 * 00148 * @param __base The locale to copy. 00149 * @param __s Name of the locale to use facets from. 00150 * @param __cat Set of categories defining the facets to use from __s. 00151 * @throw std::runtime_error if __s is null or an undefined locale. 00152 */ 00153 locale(const locale& __base, const char* __s, category __cat); 00154 00155 /** 00156 * @brief Construct locale with facets from another locale. 00157 * 00158 * Constructs a copy of the locale @a base. The facets specified by @a 00159 * cat are replaced with those from the locale @a add. If @a base and @a 00160 * add are named, this locale instance will also be named. 00161 * 00162 * @param __base The locale to copy. 00163 * @param __add The locale to use facets from. 00164 * @param __cat Set of categories defining the facets to use from add. 00165 */ 00166 locale(const locale& __base, const locale& __add, category __cat); 00167 00168 /** 00169 * @brief Construct locale with another facet. 00170 * 00171 * Constructs a copy of the locale @a __other. The facet @a __f 00172 * is added to @a __other, replacing an existing facet of type 00173 * Facet if there is one. If @a __f is null, this locale is a 00174 * copy of @a __other. 00175 * 00176 * @param __other The locale to copy. 00177 * @param __f The facet to add in. 00178 */ 00179 template<typename _Facet> 00180 locale(const locale& __other, _Facet* __f); 00181 00182 /// Locale destructor. 00183 ~locale() throw(); 00184 00185 /** 00186 * @brief Assignment operator. 00187 * 00188 * Set this locale to be a copy of @a other. 00189 * 00190 * @param __other The locale to copy. 00191 * @return A reference to this locale. 00192 */ 00193 const locale& 00194 operator=(const locale& __other) throw(); 00195 00196 /** 00197 * @brief Construct locale with another facet. 00198 * 00199 * Constructs and returns a new copy of this locale. Adds or replaces an 00200 * existing facet of type Facet from the locale @a other into the new 00201 * locale. 00202 * 00203 * @tparam _Facet The facet type to copy from other 00204 * @param __other The locale to copy from. 00205 * @return Newly constructed locale. 00206 * @throw std::runtime_error if __other has no facet of type _Facet. 00207 */ 00208 template<typename _Facet> 00209 locale 00210 combine(const locale& __other) const; 00211 00212 // Locale operations: 00213 /** 00214 * @brief Return locale name. 00215 * @return Locale name or "*" if unnamed. 00216 */ 00217 string 00218 name() const; 00219 00220 /** 00221 * @brief Locale equality. 00222 * 00223 * @param __other The locale to compare against. 00224 * @return True if other and this refer to the same locale instance, are 00225 * copies, or have the same name. False otherwise. 00226 */ 00227 bool 00228 operator==(const locale& __other) const throw(); 00229 00230 /** 00231 * @brief Locale inequality. 00232 * 00233 * @param __other The locale to compare against. 00234 * @return ! (*this == __other) 00235 */ 00236 bool 00237 operator!=(const locale& __other) const throw() 00238 { return !(this->operator==(__other)); } 00239 00240 /** 00241 * @brief Compare two strings according to collate. 00242 * 00243 * Template operator to compare two strings using the compare function of 00244 * the collate facet in this locale. One use is to provide the locale to 00245 * the sort function. For example, a vector v of strings could be sorted 00246 * according to locale loc by doing: 00247 * @code 00248 * std::sort(v.begin(), v.end(), loc); 00249 * @endcode 00250 * 00251 * @param __s1 First string to compare. 00252 * @param __s2 Second string to compare. 00253 * @return True if collate<_Char> facet compares __s1 < __s2, else false. 00254 */ 00255 template<typename _Char, typename _Traits, typename _Alloc> 00256 bool 00257 operator()(const basic_string<_Char, _Traits, _Alloc>& __s1, 00258 const basic_string<_Char, _Traits, _Alloc>& __s2) const; 00259 00260 // Global locale objects: 00261 /** 00262 * @brief Set global locale 00263 * 00264 * This function sets the global locale to the argument and returns a 00265 * copy of the previous global locale. If the argument has a name, it 00266 * will also call std::setlocale(LC_ALL, loc.name()). 00267 * 00268 * @param __loc The new locale to make global. 00269 * @return Copy of the old global locale. 00270 */ 00271 static locale 00272 global(const locale& __loc); 00273 00274 /** 00275 * @brief Return reference to the C locale. 00276 */ 00277 static const locale& 00278 classic(); 00279 00280 private: 00281 // The (shared) implementation 00282 _Impl* _M_impl; 00283 00284 // The "C" reference locale 00285 static _Impl* _S_classic; 00286 00287 // Current global locale 00288 static _Impl* _S_global; 00289 00290 // Names of underlying locale categories. 00291 // NB: locale::global() has to know how to modify all the 00292 // underlying categories, not just the ones required by the C++ 00293 // standard. 00294 static const char* const* const _S_categories; 00295 00296 // Number of standard categories. For C++, these categories are 00297 // collate, ctype, monetary, numeric, time, and messages. These 00298 // directly correspond to ISO C99 macros LC_COLLATE, LC_CTYPE, 00299 // LC_MONETARY, LC_NUMERIC, and LC_TIME. In addition, POSIX (IEEE 00300 // 1003.1-2001) specifies LC_MESSAGES. 00301 // In addition to the standard categories, the underlying 00302 // operating system is allowed to define extra LC_* 00303 // macros. For GNU systems, the following are also valid: 00304 // LC_PAPER, LC_NAME, LC_ADDRESS, LC_TELEPHONE, LC_MEASUREMENT, 00305 // and LC_IDENTIFICATION. 00306 enum { _S_categories_size = 6 + _GLIBCXX_NUM_CATEGORIES }; 00307 00308 #ifdef __GTHREADS 00309 static __gthread_once_t _S_once; 00310 #endif 00311 00312 explicit 00313 locale(_Impl*) throw(); 00314 00315 static void 00316 _S_initialize(); 00317 00318 static void 00319 _S_initialize_once() throw(); 00320 00321 static category 00322 _S_normalize_category(category); 00323 00324 void 00325 _M_coalesce(const locale& __base, const locale& __add, category __cat); 00326 }; 00327 00328 00329 // 22.1.1.1.2 Class locale::facet 00330 /** 00331 * @brief Localization functionality base class. 00332 * @ingroup locales 00333 * 00334 * The facet class is the base class for a localization feature, such as 00335 * money, time, and number printing. It provides common support for facets 00336 * and reference management. 00337 * 00338 * Facets may not be copied or assigned. 00339 */ 00340 class locale::facet 00341 { 00342 private: 00343 friend class locale; 00344 friend class locale::_Impl; 00345 00346 mutable _Atomic_word _M_refcount; 00347 00348 // Contains data from the underlying "C" library for the classic locale. 00349 static __c_locale _S_c_locale; 00350 00351 // String literal for the name of the classic locale. 00352 static const char _S_c_name[2]; 00353 00354 #ifdef __GTHREADS 00355 static __gthread_once_t _S_once; 00356 #endif 00357 00358 static void 00359 _S_initialize_once(); 00360 00361 protected: 00362 /** 00363 * @brief Facet constructor. 00364 * 00365 * This is the constructor provided by the standard. If refs is 0, the 00366 * facet is destroyed when the last referencing locale is destroyed. 00367 * Otherwise the facet will never be destroyed. 00368 * 00369 * @param __refs The initial value for reference count. 00370 */ 00371 explicit 00372 facet(size_t __refs = 0) throw() : _M_refcount(__refs ? 1 : 0) 00373 { } 00374 00375 /// Facet destructor. 00376 virtual 00377 ~facet(); 00378 00379 static void 00380 _S_create_c_locale(__c_locale& __cloc, const char* __s, 00381 __c_locale __old = 0); 00382 00383 static __c_locale 00384 _S_clone_c_locale(__c_locale& __cloc) throw(); 00385 00386 static void 00387 _S_destroy_c_locale(__c_locale& __cloc); 00388 00389 static __c_locale 00390 _S_lc_ctype_c_locale(__c_locale __cloc, const char* __s); 00391 00392 // Returns data from the underlying "C" library data for the 00393 // classic locale. 00394 static __c_locale 00395 _S_get_c_locale(); 00396 00397 _GLIBCXX_CONST static const char* 00398 _S_get_c_name() throw(); 00399 00400 private: 00401 void 00402 _M_add_reference() const throw() 00403 { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); } 00404 00405 void 00406 _M_remove_reference() const throw() 00407 { 00408 // Be race-detector-friendly. For more info see bits/c++config. 00409 _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_refcount); 00410 if (__gnu_cxx::__exchange_and_add_dispatch(&_M_refcount, -1) == 1) 00411 { 00412 _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&_M_refcount); 00413 __try 00414 { delete this; } 00415 __catch(...) 00416 { } 00417 } 00418 } 00419 00420 facet(const facet&); // Not defined. 00421 00422 facet& 00423 operator=(const facet&); // Not defined. 00424 }; 00425 00426 00427 // 22.1.1.1.3 Class locale::id 00428 /** 00429 * @brief Facet ID class. 00430 * @ingroup locales 00431 * 00432 * The ID class provides facets with an index used to identify them. 00433 * Every facet class must define a public static member locale::id, or be 00434 * derived from a facet that provides this member, otherwise the facet 00435 * cannot be used in a locale. The locale::id ensures that each class 00436 * type gets a unique identifier. 00437 */ 00438 class locale::id 00439 { 00440 private: 00441 friend class locale; 00442 friend class locale::_Impl; 00443 00444 template<typename _Facet> 00445 friend const _Facet& 00446 use_facet(const locale&); 00447 00448 template<typename _Facet> 00449 friend bool 00450 has_facet(const locale&) throw(); 00451 00452 // NB: There is no accessor for _M_index because it may be used 00453 // before the constructor is run; the effect of calling a member 00454 // function (even an inline) would be undefined. 00455 mutable size_t _M_index; 00456 00457 // Last id number assigned. 00458 static _Atomic_word _S_refcount; 00459 00460 void 00461 operator=(const id&); // Not defined. 00462 00463 id(const id&); // Not defined. 00464 00465 public: 00466 // NB: This class is always a static data member, and thus can be 00467 // counted on to be zero-initialized. 00468 /// Constructor. 00469 id() { } 00470 00471 size_t 00472 _M_id() const throw(); 00473 }; 00474 00475 00476 // Implementation object for locale. 00477 class locale::_Impl 00478 { 00479 public: 00480 // Friends. 00481 friend class locale; 00482 friend class locale::facet; 00483 00484 template<typename _Facet> 00485 friend bool 00486 has_facet(const locale&) throw(); 00487 00488 template<typename _Facet> 00489 friend const _Facet& 00490 use_facet(const locale&); 00491 00492 template<typename _Cache> 00493 friend struct __use_cache; 00494 00495 private: 00496 // Data Members. 00497 _Atomic_word _M_refcount; 00498 const facet** _M_facets; 00499 size_t _M_facets_size; 00500 const facet** _M_caches; 00501 char** _M_names; 00502 static const locale::id* const _S_id_ctype[]; 00503 static const locale::id* const _S_id_numeric[]; 00504 static const locale::id* const _S_id_collate[]; 00505 static const locale::id* const _S_id_time[]; 00506 static const locale::id* const _S_id_monetary[]; 00507 static const locale::id* const _S_id_messages[]; 00508 static const locale::id* const* const _S_facet_categories[]; 00509 00510 void 00511 _M_add_reference() throw() 00512 { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); } 00513 00514 void 00515 _M_remove_reference() throw() 00516 { 00517 // Be race-detector-friendly. For more info see bits/c++config. 00518 _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_refcount); 00519 if (__gnu_cxx::__exchange_and_add_dispatch(&_M_refcount, -1) == 1) 00520 { 00521 _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&_M_refcount); 00522 __try 00523 { delete this; } 00524 __catch(...) 00525 { } 00526 } 00527 } 00528 00529 _Impl(const _Impl&, size_t); 00530 _Impl(const char*, size_t); 00531 _Impl(size_t) throw(); 00532 00533 ~_Impl() throw(); 00534 00535 _Impl(const _Impl&); // Not defined. 00536 00537 void 00538 operator=(const _Impl&); // Not defined. 00539 00540 bool 00541 _M_check_same_name() 00542 { 00543 bool __ret = true; 00544 if (_M_names[1]) 00545 // We must actually compare all the _M_names: can be all equal! 00546 for (size_t __i = 0; __ret && __i < _S_categories_size - 1; ++__i) 00547 __ret = __builtin_strcmp(_M_names[__i], _M_names[__i + 1]) == 0; 00548 return __ret; 00549 } 00550 00551 void 00552 _M_replace_categories(const _Impl*, category); 00553 00554 void 00555 _M_replace_category(const _Impl*, const locale::id* const*); 00556 00557 void 00558 _M_replace_facet(const _Impl*, const locale::id*); 00559 00560 void 00561 _M_install_facet(const locale::id*, const facet*); 00562 00563 template<typename _Facet> 00564 void 00565 _M_init_facet(_Facet* __facet) 00566 { _M_install_facet(&_Facet::id, __facet); } 00567 00568 void 00569 _M_install_cache(const facet*, size_t); 00570 }; 00571 00572 00573 /** 00574 * @brief Facet for localized string comparison. 00575 * 00576 * This facet encapsulates the code to compare strings in a localized 00577 * manner. 00578 * 00579 * The collate template uses protected virtual functions to provide 00580 * the actual results. The public accessors forward the call to 00581 * the virtual functions. These virtual functions are hooks for 00582 * developers to implement the behavior they require from the 00583 * collate facet. 00584 */ 00585 template<typename _CharT> 00586 class collate : public locale::facet 00587 { 00588 public: 00589 // Types: 00590 //@{ 00591 /// Public typedefs 00592 typedef _CharT char_type; 00593 typedef basic_string<_CharT> string_type; 00594 //@} 00595 00596 protected: 00597 // Underlying "C" library locale information saved from 00598 // initialization, needed by collate_byname as well. 00599 __c_locale _M_c_locale_collate; 00600 00601 public: 00602 /// Numpunct facet id. 00603 static locale::id id; 00604 00605 /** 00606 * @brief Constructor performs initialization. 00607 * 00608 * This is the constructor provided by the standard. 00609 * 00610 * @param __refs Passed to the base facet class. 00611 */ 00612 explicit 00613 collate(size_t __refs = 0) 00614 : facet(__refs), _M_c_locale_collate(_S_get_c_locale()) 00615 { } 00616 00617 /** 00618 * @brief Internal constructor. Not for general use. 00619 * 00620 * This is a constructor for use by the library itself to set up new 00621 * locales. 00622 * 00623 * @param __cloc The C locale. 00624 * @param __refs Passed to the base facet class. 00625 */ 00626 explicit 00627 collate(__c_locale __cloc, size_t __refs = 0) 00628 : facet(__refs), _M_c_locale_collate(_S_clone_c_locale(__cloc)) 00629 { } 00630 00631 /** 00632 * @brief Compare two strings. 00633 * 00634 * This function compares two strings and returns the result by calling 00635 * collate::do_compare(). 00636 * 00637 * @param __lo1 Start of string 1. 00638 * @param __hi1 End of string 1. 00639 * @param __lo2 Start of string 2. 00640 * @param __hi2 End of string 2. 00641 * @return 1 if string1 > string2, -1 if string1 < string2, else 0. 00642 */ 00643 int 00644 compare(const _CharT* __lo1, const _CharT* __hi1, 00645 const _CharT* __lo2, const _CharT* __hi2) const 00646 { return this->do_compare(__lo1, __hi1, __lo2, __hi2); } 00647 00648 /** 00649 * @brief Transform string to comparable form. 00650 * 00651 * This function is a wrapper for strxfrm functionality. It takes the 00652 * input string and returns a modified string that can be directly 00653 * compared to other transformed strings. In the C locale, this 00654 * function just returns a copy of the input string. In some other 00655 * locales, it may replace two chars with one, change a char for 00656 * another, etc. It does so by returning collate::do_transform(). 00657 * 00658 * @param __lo Start of string. 00659 * @param __hi End of string. 00660 * @return Transformed string_type. 00661 */ 00662 string_type 00663 transform(const _CharT* __lo, const _CharT* __hi) const 00664 { return this->do_transform(__lo, __hi); } 00665 00666 /** 00667 * @brief Return hash of a string. 00668 * 00669 * This function computes and returns a hash on the input string. It 00670 * does so by returning collate::do_hash(). 00671 * 00672 * @param __lo Start of string. 00673 * @param __hi End of string. 00674 * @return Hash value. 00675 */ 00676 long 00677 hash(const _CharT* __lo, const _CharT* __hi) const 00678 { return this->do_hash(__lo, __hi); } 00679 00680 // Used to abstract out _CharT bits in virtual member functions, below. 00681 int 00682 _M_compare(const _CharT*, const _CharT*) const throw(); 00683 00684 size_t 00685 _M_transform(_CharT*, const _CharT*, size_t) const throw(); 00686 00687 protected: 00688 /// Destructor. 00689 virtual 00690 ~collate() 00691 { _S_destroy_c_locale(_M_c_locale_collate); } 00692 00693 /** 00694 * @brief Compare two strings. 00695 * 00696 * This function is a hook for derived classes to change the value 00697 * returned. @see compare(). 00698 * 00699 * @param __lo1 Start of string 1. 00700 * @param __hi1 End of string 1. 00701 * @param __lo2 Start of string 2. 00702 * @param __hi2 End of string 2. 00703 * @return 1 if string1 > string2, -1 if string1 < string2, else 0. 00704 */ 00705 virtual int 00706 do_compare(const _CharT* __lo1, const _CharT* __hi1, 00707 const _CharT* __lo2, const _CharT* __hi2) const; 00708 00709 /** 00710 * @brief Transform string to comparable form. 00711 * 00712 * This function is a hook for derived classes to change the value 00713 * returned. 00714 * 00715 * @param __lo Start. 00716 * @param __hi End. 00717 * @return transformed string. 00718 */ 00719 virtual string_type 00720 do_transform(const _CharT* __lo, const _CharT* __hi) const; 00721 00722 /** 00723 * @brief Return hash of a string. 00724 * 00725 * This function computes and returns a hash on the input string. This 00726 * function is a hook for derived classes to change the value returned. 00727 * 00728 * @param __lo Start of string. 00729 * @param __hi End of string. 00730 * @return Hash value. 00731 */ 00732 virtual long 00733 do_hash(const _CharT* __lo, const _CharT* __hi) const; 00734 }; 00735 00736 template<typename _CharT> 00737 locale::id collate<_CharT>::id; 00738 00739 // Specializations. 00740 template<> 00741 int 00742 collate<char>::_M_compare(const char*, const char*) const throw(); 00743 00744 template<> 00745 size_t 00746 collate<char>::_M_transform(char*, const char*, size_t) const throw(); 00747 00748 #ifdef _GLIBCXX_USE_WCHAR_T 00749 template<> 00750 int 00751 collate<wchar_t>::_M_compare(const wchar_t*, const wchar_t*) const throw(); 00752 00753 template<> 00754 size_t 00755 collate<wchar_t>::_M_transform(wchar_t*, const wchar_t*, size_t) const throw(); 00756 #endif 00757 00758 /// class collate_byname [22.2.4.2]. 00759 template<typename _CharT> 00760 class collate_byname : public collate<_CharT> 00761 { 00762 public: 00763 //@{ 00764 /// Public typedefs 00765 typedef _CharT char_type; 00766 typedef basic_string<_CharT> string_type; 00767 //@} 00768 00769 explicit 00770 collate_byname(const char* __s, size_t __refs = 0) 00771 : collate<_CharT>(__refs) 00772 { 00773 if (__builtin_strcmp(__s, "C") != 0 00774 && __builtin_strcmp(__s, "POSIX") != 0) 00775 { 00776 this->_S_destroy_c_locale(this->_M_c_locale_collate); 00777 this->_S_create_c_locale(this->_M_c_locale_collate, __s); 00778 } 00779 } 00780 00781 protected: 00782 virtual 00783 ~collate_byname() { } 00784 }; 00785 00786 _GLIBCXX_END_NAMESPACE_VERSION 00787 } // namespace 00788 00789 # include <bits/locale_classes.tcc> 00790 00791 #endif