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  1. // <string> Forward declarations -*- C++ -*-
  2.  
  3. // Copyright (C) 2001-2015 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
  21. // a copy of the GCC Runtime Library Exception along with this program;
  22. // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23. // <http://www.gnu.org/licenses/>.
  24.  
  25. /** @file bits/stringfwd.h
  26.  *  This is an internal header file, included by other library headers.
  27.  *  Do not attempt to use it directly. @headername{string}
  28.  */
  29.  
  30. //
  31. // ISO C++ 14882: 21 Strings library
  32. //
  33.  
  34. #ifndef _STRINGFWD_H
  35. #define _STRINGFWD_H 1
  36.  
  37. #pragma GCC system_header
  38.  
  39. #include <bits/c++config.h>
  40. #include <bits/memoryfwd.h>
  41.  
  42. namespace std _GLIBCXX_VISIBILITY(default)
  43. {
  44. _GLIBCXX_BEGIN_NAMESPACE_VERSION
  45.  
  46.   /**
  47.    *  @defgroup strings Strings
  48.    *
  49.    *  @{
  50.   */
  51.  
  52.   template<class _CharT>
  53.     struct char_traits;
  54.  
  55.   template<> struct char_traits<char>;
  56.  
  57. #ifdef _GLIBCXX_USE_WCHAR_T
  58.   template<> struct char_traits<wchar_t>;
  59. #endif
  60.  
  61. #if ((__cplusplus >= 201103L) \
  62.      && defined(_GLIBCXX_USE_C99_STDINT_TR1))
  63.   template<> struct char_traits<char16_t>;
  64.   template<> struct char_traits<char32_t>;
  65. #endif
  66.  
  67. _GLIBCXX_BEGIN_NAMESPACE_CXX11
  68.  
  69.   template<typename _CharT, typename _Traits = char_traits<_CharT>,
  70.            typename _Alloc = allocator<_CharT> >
  71.     class basic_string;
  72.  
  73.   /// A string of @c char
  74.   typedef basic_string<char>    string;  
  75.  
  76. #ifdef _GLIBCXX_USE_WCHAR_T
  77.   /// A string of @c wchar_t
  78.   typedef basic_string<wchar_t> wstring;  
  79. #endif
  80.  
  81. #if ((__cplusplus >= 201103L) \
  82.      && defined(_GLIBCXX_USE_C99_STDINT_TR1))
  83.   /// A string of @c char16_t
  84.   typedef basic_string<char16_t> u16string;
  85.  
  86.   /// A string of @c char32_t
  87.   typedef basic_string<char32_t> u32string;
  88. #endif
  89.  
  90. _GLIBCXX_END_NAMESPACE_CXX11
  91.  
  92.   /** @}  */
  93.  
  94. _GLIBCXX_END_NAMESPACE_VERSION
  95. } // namespace std
  96.  
  97. #endif  // _STRINGFWD_H
  98.