00001 // Locale support -*- C++ -*- 00002 00003 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 00004 // 2006, 2007, 2008 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 2, 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 // You should have received a copy of the GNU General Public License along 00019 // with this library; see the file COPYING. If not, write to the Free 00020 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 00021 // USA. 00022 00023 // As a special exception, you may use this file as part of a free software 00024 // library without restriction. Specifically, if other files instantiate 00025 // templates or use macros or inline functions from this file, or you compile 00026 // this file and link it with other files to produce an executable, this 00027 // file does not by itself cause the resulting executable to be covered by 00028 // the GNU General Public License. This exception does not however 00029 // invalidate any other reasons why the executable file might be covered by 00030 // the GNU General Public License. 00031 00032 /** @file locale_classes.h 00033 * This is an internal header file, included by other library headers. 00034 * You should not attempt to use it directly. 00035 */ 00036 00037 // 00038 // ISO C++ 14882: 22.1 Locales 00039 // 00040 00041 #ifndef _LOCALE_CLASSES_H 00042 #define _LOCALE_CLASSES_H 1 00043 00044 #pragma GCC system_header 00045 00046 #include <bits/localefwd.h> 00047 #include <string> 00048 #include <ext/atomicity.h> 00049 00050 _GLIBCXX_BEGIN_NAMESPACE(std) 00051 00052 // 22.1.1 Class locale 00053 /** 00054 * @brief Container class for localization functionality. 00055 * 00056 * The locale class is first a class wrapper for C library locales. It is 00057 * also an extensible container for user-defined localization. A locale is 00058 * a collection of facets that implement various localization features such 00059 * as money, time, and number printing. 00060 * 00061 * Constructing C++ locales does not change the C library locale. 00062 * 00063 * This library supports efficient construction and copying of locales 00064 * through a reference counting implementation of the locale class. 00065 */ 00066 class locale 00067 { 00068 public: 00069 // Types: 00070 /// Definition of locale::category. 00071 typedef int category; 00072 00073 // Forward decls and friends: 00074 class facet; 00075 class id; 00076 class _Impl; 00077 00078 friend class facet; 00079 friend class _Impl; 00080 00081 template<typename _Facet> 00082 friend bool 00083 has_facet(const locale&) throw(); 00084 00085 template<typename _Facet> 00086 friend const _Facet& 00087 use_facet(const locale&); 00088 00089 template<typename _Cache> 00090 friend struct __use_cache; 00091 00092 //@{ 00093 /** 00094 * @brief Category values. 00095 * 00096 * The standard category values are none, ctype, numeric, collate, time, 00097 * monetary, and messages. They form a bitmask that supports union and 00098 * intersection. The category all is the union of these values. 00099 * 00100 * NB: Order must match _S_facet_categories definition in locale.cc 00101 */ 00102 static const category none = 0; 00103 static const category ctype = 1L << 0; 00104 static const category numeric = 1L << 1; 00105 static const category collate = 1L << 2; 00106 static const category time = 1L << 3; 00107 static const category monetary = 1L << 4; 00108 static const category messages = 1L << 5; 00109 static const category all = (ctype | numeric | collate | 00110 time | monetary | messages); 00111 //@} 00112 00113 // Construct/copy/destroy: 00114 00115 /** 00116 * @brief Default constructor. 00117 * 00118 * Constructs a copy of the global locale. If no locale has been 00119 * explicitly set, this is the "C" locale. 00120 */ 00121 locale() throw(); 00122 00123 /** 00124 * @brief Copy constructor. 00125 * 00126 * Constructs a copy of @a other. 00127 * 00128 * @param other The locale to copy. 00129 */ 00130 locale(const locale& __other) throw(); 00131 00132 /** 00133 * @brief Named locale constructor. 00134 * 00135 * Constructs a copy of the named C library locale. 00136 * 00137 * @param s Name of the locale to construct. 00138 * @throw std::runtime_error if s is null or an undefined locale. 00139 */ 00140 explicit 00141 locale(const char* __s); 00142 00143 /** 00144 * @brief Construct locale with facets from another locale. 00145 * 00146 * Constructs a copy of the locale @a base. The facets specified by @a 00147 * cat are replaced with those from the locale named by @a s. If base is 00148 * named, this locale instance will also be named. 00149 * 00150 * @param base The locale to copy. 00151 * @param s Name of the locale to use facets from. 00152 * @param cat Set of categories defining the facets to use from s. 00153 * @throw std::runtime_error if s is null or an undefined locale. 00154 */ 00155 locale(const locale& __base, const char* __s, category __cat); 00156 00157 /** 00158 * @brief Construct locale with facets from another locale. 00159 * 00160 * Constructs a copy of the locale @a base. The facets specified by @a 00161 * cat are replaced with those from the locale @a add. If @a base and @a 00162 * add are named, this locale instance will also be named. 00163 * 00164 * @param base The locale to copy. 00165 * @param add The locale to use facets from. 00166 * @param cat Set of categories defining the facets to use from add. 00167 */ 00168 locale(const locale& __base, const locale& __add, category __cat); 00169 00170 /** 00171 * @brief Construct locale with another facet. 00172 * 00173 * Constructs a copy of the locale @a other. The facet @f is added to 00174 * @other, replacing an existing facet of type Facet if there is one. If 00175 * @f is null, this locale is a copy of @a other. 00176 * 00177 * @param other The locale to copy. 00178 * @param f The facet to add in. 00179 */ 00180 template<typename _Facet> 00181 locale(const locale& __other, _Facet* __f); 00182 00183 /// Locale destructor. 00184 ~locale() throw(); 00185 00186 /** 00187 * @brief Assignment operator. 00188 * 00189 * Set this locale to be a copy of @a other. 00190 * 00191 * @param other The locale to copy. 00192 * @return A reference to this locale. 00193 */ 00194 const locale& 00195 operator=(const locale& __other) throw(); 00196 00197 /** 00198 * @brief Construct locale with another facet. 00199 * 00200 * Constructs and returns a new copy of this locale. Adds or replaces an 00201 * existing facet of type Facet from the locale @a other into the new 00202 * locale. 00203 * 00204 * @param Facet The facet type to copy from other 00205 * @param other The locale to copy from. 00206 * @return Newly constructed locale. 00207 * @throw std::runtime_error if other has no facet of type Facet. 00208 */ 00209 template<typename _Facet> 00210 locale 00211 combine(const locale& __other) const; 00212 00213 // Locale operations: 00214 /** 00215 * @brief Return locale name. 00216 * @return Locale name or "*" if unnamed. 00217 */ 00218 string 00219 name() const; 00220 00221 /** 00222 * @brief Locale equality. 00223 * 00224 * @param other The locale to compare against. 00225 * @return True if other and this refer to the same locale instance, are 00226 * copies, or have the same name. False otherwise. 00227 */ 00228 bool 00229 operator==(const locale& __other) const throw (); 00230 00231 /** 00232 * @brief Locale inequality. 00233 * 00234 * @param other The locale to compare against. 00235 * @return ! (*this == other) 00236 */ 00237 bool 00238 operator!=(const locale& __other) const throw () 00239 { return !(this->operator==(__other)); } 00240 00241 /** 00242 * @brief Compare two strings according to collate. 00243 * 00244 * Template operator to compare two strings using the compare function of 00245 * the collate facet in this locale. One use is to provide the locale to 00246 * the sort function. For example, a vector v of strings could be sorted 00247 * according to locale loc by doing: 00248 * @code 00249 * std::sort(v.begin(), v.end(), loc); 00250 * @endcode 00251 * 00252 * @param s1 First string to compare. 00253 * @param s2 Second string to compare. 00254 * @return True if collate<Char> facet compares s1 < s2, else false. 00255 */ 00256 template<typename _Char, typename _Traits, typename _Alloc> 00257 bool 00258 operator()(const basic_string<_Char, _Traits, _Alloc>& __s1, 00259 const basic_string<_Char, _Traits, _Alloc>& __s2) const; 00260 00261 // Global locale objects: 00262 /** 00263 * @brief Set global locale 00264 * 00265 * This function sets the global locale to the argument and returns a 00266 * copy of the previous global locale. If the argument has a name, it 00267 * will also call std::setlocale(LC_ALL, loc.name()). 00268 * 00269 * @param locale The new locale to make global. 00270 * @return Copy of the old global locale. 00271 */ 00272 static locale 00273 global(const locale&); 00274 00275 /** 00276 * @brief Return reference to the "C" locale. 00277 */ 00278 static const locale& 00279 classic(); 00280 00281 private: 00282 // The (shared) implementation 00283 _Impl* _M_impl; 00284 00285 // The "C" reference locale 00286 static _Impl* _S_classic; 00287 00288 // Current global locale 00289 static _Impl* _S_global; 00290 00291 // Names of underlying locale categories. 00292 // NB: locale::global() has to know how to modify all the 00293 // underlying categories, not just the ones required by the C++ 00294 // standard. 00295 static const char* const* const _S_categories; 00296 00297 // Number of standard categories. For C++, these categories are 00298 // collate, ctype, monetary, numeric, time, and messages. These 00299 // directly correspond to ISO C99 macros LC_COLLATE, LC_CTYPE, 00300 // LC_MONETARY, LC_NUMERIC, and LC_TIME. In addition, POSIX (IEEE 00301 // 1003.1-2001) specifies LC_MESSAGES. 00302 // In addition to the standard categories, the underlying 00303 // operating system is allowed to define extra LC_* 00304 // macros. For GNU systems, the following are also valid: 00305 // LC_PAPER, LC_NAME, LC_ADDRESS, LC_TELEPHONE, LC_MEASUREMENT, 00306 // and LC_IDENTIFICATION. 00307 enum { _S_categories_size = 6 + _GLIBCXX_NUM_CATEGORIES }; 00308 00309 #ifdef __GTHREADS 00310 static __gthread_once_t _S_once; 00311 #endif 00312 00313 explicit 00314 locale(_Impl*) throw(); 00315 00316 static void 00317 _S_initialize(); 00318 00319 static void 00320 _S_initialize_once(); 00321 00322 static category 00323 _S_normalize_category(category); 00324 00325 void 00326 _M_coalesce(const locale& __base, const locale& __add, category __cat); 00327 }; 00328 00329 00330 // 22.1.1.1.2 Class locale::facet 00331 /** 00332 * @brief Localization functionality base class. 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); 00385 00386 static void 00387 _S_destroy_c_locale(__c_locale& __cloc); 00388 00389 // Returns data from the underlying "C" library data for the 00390 // classic locale. 00391 static __c_locale 00392 _S_get_c_locale(); 00393 00394 static const char* 00395 _S_get_c_name(); 00396 00397 private: 00398 void 00399 _M_add_reference() const throw() 00400 { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); } 00401 00402 void 00403 _M_remove_reference() const throw() 00404 { 00405 if (__gnu_cxx::__exchange_and_add_dispatch(&_M_refcount, -1) == 1) 00406 { 00407 try 00408 { delete this; } 00409 catch(...) 00410 { } 00411 } 00412 } 00413 00414 facet(const facet&); // Not defined. 00415 00416 facet& 00417 operator=(const facet&); // Not defined. 00418 }; 00419 00420 00421 // 22.1.1.1.3 Class locale::id 00422 /** 00423 * @brief Facet ID class. 00424 * 00425 * The ID class provides facets with an index used to identify them. 00426 * Every facet class must define a public static member locale::id, or be 00427 * derived from a facet that provides this member, otherwise the facet 00428 * cannot be used in a locale. The locale::id ensures that each class 00429 * type gets a unique identifier. 00430 */ 00431 class locale::id 00432 { 00433 private: 00434 friend class locale; 00435 friend class locale::_Impl; 00436 00437 template<typename _Facet> 00438 friend const _Facet& 00439 use_facet(const locale&); 00440 00441 template<typename _Facet> 00442 friend bool 00443 has_facet(const locale&) throw (); 00444 00445 // NB: There is no accessor for _M_index because it may be used 00446 // before the constructor is run; the effect of calling a member 00447 // function (even an inline) would be undefined. 00448 mutable size_t _M_index; 00449 00450 // Last id number assigned. 00451 static _Atomic_word _S_refcount; 00452 00453 void 00454 operator=(const id&); // Not defined. 00455 00456 id(const id&); // Not defined. 00457 00458 public: 00459 // NB: This class is always a static data member, and thus can be 00460 // counted on to be zero-initialized. 00461 /// Constructor. 00462 id() { } 00463 00464 size_t 00465 _M_id() const; 00466 }; 00467 00468 00469 // Implementation object for locale. 00470 class locale::_Impl 00471 { 00472 public: 00473 // Friends. 00474 friend class locale; 00475 friend class locale::facet; 00476 00477 template<typename _Facet> 00478 friend bool 00479 has_facet(const locale&) throw(); 00480 00481 template<typename _Facet> 00482 friend const _Facet& 00483 use_facet(const locale&); 00484 00485 template<typename _Cache> 00486 friend struct __use_cache; 00487 00488 private: 00489 // Data Members. 00490 _Atomic_word _M_refcount; 00491 const facet** _M_facets; 00492 size_t _M_facets_size; 00493 const facet** _M_caches; 00494 char** _M_names; 00495 static const locale::id* const _S_id_ctype[]; 00496 static const locale::id* const _S_id_numeric[]; 00497 static const locale::id* const _S_id_collate[]; 00498 static const locale::id* const _S_id_time[]; 00499 static const locale::id* const _S_id_monetary[]; 00500 static const locale::id* const _S_id_messages[]; 00501 static const locale::id* const* const _S_facet_categories[]; 00502 00503 void 00504 _M_add_reference() throw() 00505 { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); } 00506 00507 void 00508 _M_remove_reference() throw() 00509 { 00510 if (__gnu_cxx::__exchange_and_add_dispatch(&_M_refcount, -1) == 1) 00511 { 00512 try 00513 { delete this; } 00514 catch(...) 00515 { } 00516 } 00517 } 00518 00519 _Impl(const _Impl&, size_t); 00520 _Impl(const char*, size_t); 00521 _Impl(size_t) throw(); 00522 00523 ~_Impl() throw(); 00524 00525 _Impl(const _Impl&); // Not defined. 00526 00527 void 00528 operator=(const _Impl&); // Not defined. 00529 00530 bool 00531 _M_check_same_name() 00532 { 00533 bool __ret = true; 00534 if (_M_names[1]) 00535 // We must actually compare all the _M_names: can be all equal! 00536 for (size_t __i = 0; __ret && __i < _S_categories_size - 1; ++__i) 00537 __ret = __builtin_strcmp(_M_names[__i], _M_names[__i + 1]) == 0; 00538 return __ret; 00539 } 00540 00541 void 00542 _M_replace_categories(const _Impl*, category); 00543 00544 void 00545 _M_replace_category(const _Impl*, const locale::id* const*); 00546 00547 void 00548 _M_replace_facet(const _Impl*, const locale::id*); 00549 00550 void 00551 _M_install_facet(const locale::id*, const facet*); 00552 00553 template<typename _Facet> 00554 void 00555 _M_init_facet(_Facet* __facet) 00556 { _M_install_facet(&_Facet::id, __facet); } 00557 00558 void 00559 _M_install_cache(const facet*, size_t); 00560 }; 00561 00562 00563 /** 00564 * @brief Test for the presence of a facet. 00565 * 00566 * has_facet tests the locale argument for the presence of the facet type 00567 * provided as the template parameter. Facets derived from the facet 00568 * parameter will also return true. 00569 * 00570 * @param Facet The facet type to test the presence of. 00571 * @param locale The locale to test. 00572 * @return true if locale contains a facet of type Facet, else false. 00573 */ 00574 template<typename _Facet> 00575 bool 00576 has_facet(const locale& __loc) throw(); 00577 00578 /** 00579 * @brief Return a facet. 00580 * 00581 * use_facet looks for and returns a reference to a facet of type Facet 00582 * where Facet is the template parameter. If has_facet(locale) is true, 00583 * there is a suitable facet to return. It throws std::bad_cast if the 00584 * locale doesn't contain a facet of type Facet. 00585 * 00586 * @param Facet The facet type to access. 00587 * @param locale The locale to use. 00588 * @return Reference to facet of type Facet. 00589 * @throw std::bad_cast if locale doesn't contain a facet of type Facet. 00590 */ 00591 template<typename _Facet> 00592 const _Facet& 00593 use_facet(const locale& __loc); 00594 00595 00596 /** 00597 * @brief Facet for localized string comparison. 00598 * 00599 * This facet encapsulates the code to compare strings in a localized 00600 * manner. 00601 * 00602 * The collate template uses protected virtual functions to provide 00603 * the actual results. The public accessors forward the call to 00604 * the virtual functions. These virtual functions are hooks for 00605 * developers to implement the behavior they require from the 00606 * collate facet. 00607 */ 00608 template<typename _CharT> 00609 class collate : public locale::facet 00610 { 00611 public: 00612 // Types: 00613 //@{ 00614 /// Public typedefs 00615 typedef _CharT char_type; 00616 typedef basic_string<_CharT> string_type; 00617 //@} 00618 00619 protected: 00620 // Underlying "C" library locale information saved from 00621 // initialization, needed by collate_byname as well. 00622 __c_locale _M_c_locale_collate; 00623 00624 public: 00625 /// Numpunct facet id. 00626 static locale::id id; 00627 00628 /** 00629 * @brief Constructor performs initialization. 00630 * 00631 * This is the constructor provided by the standard. 00632 * 00633 * @param refs Passed to the base facet class. 00634 */ 00635 explicit 00636 collate(size_t __refs = 0) 00637 : facet(__refs), _M_c_locale_collate(_S_get_c_locale()) 00638 { } 00639 00640 /** 00641 * @brief Internal constructor. Not for general use. 00642 * 00643 * This is a constructor for use by the library itself to set up new 00644 * locales. 00645 * 00646 * @param cloc The "C" locale. 00647 * @param refs Passed to the base facet class. 00648 */ 00649 explicit 00650 collate(__c_locale __cloc, size_t __refs = 0) 00651 : facet(__refs), _M_c_locale_collate(_S_clone_c_locale(__cloc)) 00652 { } 00653 00654 /** 00655 * @brief Compare two strings. 00656 * 00657 * This function compares two strings and returns the result by calling 00658 * collate::do_compare(). 00659 * 00660 * @param lo1 Start of string 1. 00661 * @param hi1 End of string 1. 00662 * @param lo2 Start of string 2. 00663 * @param hi2 End of string 2. 00664 * @return 1 if string1 > string2, -1 if string1 < string2, else 0. 00665 */ 00666 int 00667 compare(const _CharT* __lo1, const _CharT* __hi1, 00668 const _CharT* __lo2, const _CharT* __hi2) const 00669 { return this->do_compare(__lo1, __hi1, __lo2, __hi2); } 00670 00671 /** 00672 * @brief Transform string to comparable form. 00673 * 00674 * This function is a wrapper for strxfrm functionality. It takes the 00675 * input string and returns a modified string that can be directly 00676 * compared to other transformed strings. In the "C" locale, this 00677 * function just returns a copy of the input string. In some other 00678 * locales, it may replace two chars with one, change a char for 00679 * another, etc. It does so by returning collate::do_transform(). 00680 * 00681 * @param lo Start of string. 00682 * @param hi End of string. 00683 * @return Transformed string_type. 00684 */ 00685 string_type 00686 transform(const _CharT* __lo, const _CharT* __hi) const 00687 { return this->do_transform(__lo, __hi); } 00688 00689 /** 00690 * @brief Return hash of a string. 00691 * 00692 * This function computes and returns a hash on the input string. It 00693 * does so by returning collate::do_hash(). 00694 * 00695 * @param lo Start of string. 00696 * @param hi End of string. 00697 * @return Hash value. 00698 */ 00699 long 00700 hash(const _CharT* __lo, const _CharT* __hi) const 00701 { return this->do_hash(__lo, __hi); } 00702 00703 // Used to abstract out _CharT bits in virtual member functions, below. 00704 int 00705 _M_compare(const _CharT*, const _CharT*) const; 00706 00707 size_t 00708 _M_transform(_CharT*, const _CharT*, size_t) const; 00709 00710 protected: 00711 /// Destructor. 00712 virtual 00713 ~collate() 00714 { _S_destroy_c_locale(_M_c_locale_collate); } 00715 00716 /** 00717 * @brief Compare two strings. 00718 * 00719 * This function is a hook for derived classes to change the value 00720 * returned. @see compare(). 00721 * 00722 * @param lo1 Start of string 1. 00723 * @param hi1 End of string 1. 00724 * @param lo2 Start of string 2. 00725 * @param hi2 End of string 2. 00726 * @return 1 if string1 > string2, -1 if string1 < string2, else 0. 00727 */ 00728 virtual int 00729 do_compare(const _CharT* __lo1, const _CharT* __hi1, 00730 const _CharT* __lo2, const _CharT* __hi2) const; 00731 00732 /** 00733 * @brief Transform string to comparable form. 00734 * 00735 * This function is a hook for derived classes to change the value 00736 * returned. 00737 * 00738 * @param lo1 Start of string 1. 00739 * @param hi1 End of string 1. 00740 * @param lo2 Start of string 2. 00741 * @param hi2 End of string 2. 00742 * @return 1 if string1 > string2, -1 if string1 < string2, else 0. 00743 */ 00744 virtual string_type 00745 do_transform(const _CharT* __lo, const _CharT* __hi) const; 00746 00747 /** 00748 * @brief Return hash of a string. 00749 * 00750 * This function computes and returns a hash on the input string. This 00751 * function is a hook for derived classes to change the value returned. 00752 * 00753 * @param lo Start of string. 00754 * @param hi End of string. 00755 * @return Hash value. 00756 */ 00757 virtual long 00758 do_hash(const _CharT* __lo, const _CharT* __hi) const; 00759 }; 00760 00761 template<typename _CharT> 00762 locale::id collate<_CharT>::id; 00763 00764 // Specializations. 00765 template<> 00766 int 00767 collate<char>::_M_compare(const char*, const char*) const; 00768 00769 template<> 00770 size_t 00771 collate<char>::_M_transform(char*, const char*, size_t) const; 00772 00773 #ifdef _GLIBCXX_USE_WCHAR_T 00774 template<> 00775 int 00776 collate<wchar_t>::_M_compare(const wchar_t*, const wchar_t*) const; 00777 00778 template<> 00779 size_t 00780 collate<wchar_t>::_M_transform(wchar_t*, const wchar_t*, size_t) const; 00781 #endif 00782 00783 /// class collate_byname [22.2.4.2]. 00784 template<typename _CharT> 00785 class collate_byname : public collate<_CharT> 00786 { 00787 public: 00788 //@{ 00789 /// Public typedefs 00790 typedef _CharT char_type; 00791 typedef basic_string<_CharT> string_type; 00792 //@} 00793 00794 explicit 00795 collate_byname(const char* __s, size_t __refs = 0) 00796 : collate<_CharT>(__refs) 00797 { 00798 if (__builtin_strcmp(__s, "C") != 0 00799 && __builtin_strcmp(__s, "POSIX") != 0) 00800 { 00801 this->_S_destroy_c_locale(this->_M_c_locale_collate); 00802 this->_S_create_c_locale(this->_M_c_locale_collate, __s); 00803 } 00804 } 00805 00806 protected: 00807 virtual 00808 ~collate_byname() { } 00809 }; 00810 00811 _GLIBCXX_END_NAMESPACE 00812 00813 #ifndef _GLIBCXX_EXPORT_TEMPLATE 00814 # include <bits/locale_classes.tcc> 00815 #endif 00816 00817 #endif