1 // <string> Forward declarations -*- C++ -*- 2 3 // Copyright (C) 2001-2013 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<typename _CharT, typename _Traits = char_traits<_CharT>, 56 typename _Alloc = allocator<_CharT> > 57 class basic_string; 58 59 template<> struct char_traits<char>; 60 61 /// A string of @c char 62 typedef basic_string<char> string; 63 64 #ifdef _GLIBCXX_USE_WCHAR_T 65 template<> struct char_traits<wchar_t>; 66 67 /// A string of @c wchar_t 68 typedef basic_string<wchar_t> wstring; 69 #endif 70 71 #if ((__cplusplus >= 201103L) \ 72 && defined(_GLIBCXX_USE_C99_STDINT_TR1)) 73 74 template<> struct char_traits<char16_t>; 75 template<> struct char_traits<char32_t>; 76 77 /// A string of @c char16_t 78 typedef basic_string<char16_t> u16string; 79 80 /// A string of @c char32_t 81 typedef basic_string<char32_t> u32string; 82 83 #endif 84 /** @} */ 85 86 _GLIBCXX_END_NAMESPACE_VERSION 87 } // namespace std 88 89 #endif // _STRINGFWD_H 90
