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stringfwd.h revision 1.1.1.8 
      1 // <string> Forward declarations -*- C++ -*-
      2 
      3 // Copyright (C) 2001-2018 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