libstdc++
stringfwd.h
Go to the documentation of this file.
00001 // <string> Forward declarations -*- C++ -*-
00002 
00003 // Copyright (C) 2001-2019 Free Software Foundation, Inc.
00004 //
00005 // This file is part of the GNU ISO C++ Library.  This library is free
00006 // software; you can redistribute it and/or modify it under the
00007 // terms of the GNU General Public License as published by the
00008 // Free Software Foundation; either version 3, or (at your option)
00009 // any later version.
00010 
00011 // This library is distributed in the hope that it will be useful,
00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014 // GNU General Public License for more details.
00015 
00016 // Under Section 7 of GPL version 3, you are granted additional
00017 // permissions described in the GCC Runtime Library Exception, version
00018 // 3.1, as published by the Free Software Foundation.
00019 
00020 // You should have received a copy of the GNU General Public License and
00021 // a copy of the GCC Runtime Library Exception along with this program;
00022 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
00023 // <http://www.gnu.org/licenses/>.
00024 
00025 /** @file bits/stringfwd.h
00026  *  This is an internal header file, included by other library headers.
00027  *  Do not attempt to use it directly. @headername{string}
00028  */
00029 
00030 //
00031 // ISO C++ 14882: 21 Strings library
00032 //
00033 
00034 #ifndef _STRINGFWD_H
00035 #define _STRINGFWD_H 1
00036 
00037 #pragma GCC system_header
00038 
00039 #include <bits/c++config.h>
00040 #include <bits/memoryfwd.h>
00041 
00042 namespace std _GLIBCXX_VISIBILITY(default)
00043 {
00044 _GLIBCXX_BEGIN_NAMESPACE_VERSION
00045 
00046   /**
00047    *  @defgroup strings Strings
00048    *
00049    *  @{
00050   */
00051 
00052   template<class _CharT>
00053     struct char_traits;
00054 
00055   template<> struct char_traits<char>;
00056 
00057 #ifdef _GLIBCXX_USE_WCHAR_T
00058   template<> struct char_traits<wchar_t>;
00059 #endif
00060 
00061 #ifdef _GLIBCXX_USE_CHAR8_T
00062   template<> struct char_traits<char8_t>;
00063 #endif
00064 
00065 #if __cplusplus >= 201103L
00066   template<> struct char_traits<char16_t>;
00067   template<> struct char_traits<char32_t>;
00068 #endif
00069 
00070 _GLIBCXX_BEGIN_NAMESPACE_CXX11
00071 
00072   template<typename _CharT, typename _Traits = char_traits<_CharT>,
00073            typename _Alloc = allocator<_CharT> >
00074     class basic_string;
00075 
00076 _GLIBCXX_END_NAMESPACE_CXX11
00077 
00078   /// A string of @c char
00079   typedef basic_string<char>    string;   
00080 
00081 #ifdef _GLIBCXX_USE_WCHAR_T
00082   /// A string of @c wchar_t
00083   typedef basic_string<wchar_t> wstring;   
00084 #endif
00085 
00086 #ifdef _GLIBCXX_USE_CHAR8_T
00087   /// A string of @c char8_t
00088   typedef basic_string<char8_t> u8string;
00089 #endif
00090 
00091 #if __cplusplus >= 201103L
00092   /// A string of @c char16_t
00093   typedef basic_string<char16_t> u16string; 
00094 
00095   /// A string of @c char32_t
00096   typedef basic_string<char32_t> u32string; 
00097 #endif
00098 
00099   /** @}  */
00100 
00101 _GLIBCXX_END_NAMESPACE_VERSION
00102 } // namespace std
00103 
00104 #endif  // _STRINGFWD_H