1 // Forwarding declarations -*- C++ -*- 2 3 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 4 // 2006, 2007, 2009 5 // Free Software Foundation, Inc. 6 // 7 // This file is part of the GNU ISO C++ Library. This library is free 8 // software; you can redistribute it and/or modify it under the 9 // terms of the GNU General Public License as published by the 10 // Free Software Foundation; either version 3, or (at your option) 11 // any later version. 12 13 // This library is distributed in the hope that it will be useful, 14 // but WITHOUT ANY WARRANTY; without even the implied warranty of 15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 // GNU General Public License for more details. 17 18 // Under Section 7 of GPL version 3, you are granted additional 19 // permissions described in the GCC Runtime Library Exception, version 20 // 3.1, as published by the Free Software Foundation. 21 22 // You should have received a copy of the GNU General Public License and 23 // a copy of the GCC Runtime Library Exception along with this program; 24 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 25 // <http://www.gnu.org/licenses/>. 26 27 /** @file iosfwd 28 * This is a Standard C++ Library header. 29 */ 30 31 // 32 // ISO C++ 14882: 27.2 Forward declarations 33 // 34 35 #ifndef _GLIBCXX_IOSFWD 36 #define _GLIBCXX_IOSFWD 1 37 38 #pragma GCC system_header 39 40 #include <bits/c++config.h> 41 #include <bits/stringfwd.h> // For string forward declarations. 42 #include <bits/postypes.h> 43 44 _GLIBCXX_BEGIN_NAMESPACE(std) 45 46 template<typename _CharT, typename _Traits = char_traits<_CharT> > 47 class basic_ios; 48 49 template<typename _CharT, typename _Traits = char_traits<_CharT> > 50 class basic_streambuf; 51 52 template<typename _CharT, typename _Traits = char_traits<_CharT> > 53 class basic_istream; 54 55 template<typename _CharT, typename _Traits = char_traits<_CharT> > 56 class basic_ostream; 57 58 template<typename _CharT, typename _Traits = char_traits<_CharT> > 59 class basic_iostream; 60 61 template<typename _CharT, typename _Traits = char_traits<_CharT>, 62 typename _Alloc = allocator<_CharT> > 63 class basic_stringbuf; 64 65 template<typename _CharT, typename _Traits = char_traits<_CharT>, 66 typename _Alloc = allocator<_CharT> > 67 class basic_istringstream; 68 69 template<typename _CharT, typename _Traits = char_traits<_CharT>, 70 typename _Alloc = allocator<_CharT> > 71 class basic_ostringstream; 72 73 template<typename _CharT, typename _Traits = char_traits<_CharT>, 74 typename _Alloc = allocator<_CharT> > 75 class basic_stringstream; 76 77 template<typename _CharT, typename _Traits = char_traits<_CharT> > 78 class basic_filebuf; 79 80 template<typename _CharT, typename _Traits = char_traits<_CharT> > 81 class basic_ifstream; 82 83 template<typename _CharT, typename _Traits = char_traits<_CharT> > 84 class basic_ofstream; 85 86 template<typename _CharT, typename _Traits = char_traits<_CharT> > 87 class basic_fstream; 88 89 template<typename _CharT, typename _Traits = char_traits<_CharT> > 90 class istreambuf_iterator; 91 92 template<typename _CharT, typename _Traits = char_traits<_CharT> > 93 class ostreambuf_iterator; 94 95 // _GLIBCXX_RESOLVE_LIB_DEFECTS 96 // Not included. (??? Apparently no LWG number?) 97 class ios_base; 98 99 /** 100 * @defgroup io I/O 101 * 102 * Nearly all of the I/O classes are parameterized on the type of 103 * characters they read and write. (The major exception is ios_base at 104 * the top of the hierarchy.) This is a change from pre-Standard 105 * streams, which were not templates. 106 * 107 * For ease of use and compatibility, all of the basic_* I/O-related 108 * classes are given typedef names for both of the builtin character 109 * widths (wide and narrow). The typedefs are the same as the 110 * pre-Standard names, for example: 111 * 112 * @code 113 * typedef basic_ifstream<char> ifstream; 114 * @endcode 115 * 116 * Because properly forward-declaring these classes can be difficult, you 117 * should not do it yourself. Instead, include the <iosfwd> 118 * header, which contains only declarations of all the I/O classes as 119 * well as the typedefs. Trying to forward-declare the typedefs 120 * themselves (e.g., "class ostream;") is not valid ISO C++. 121 * 122 * For more specific declarations, see 123 * http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch24.html 124 * 125 * @{ 126 */ 127 typedef basic_ios<char> ios; ///< @isiosfwd 128 typedef basic_streambuf<char> streambuf; ///< @isiosfwd 129 typedef basic_istream<char> istream; ///< @isiosfwd 130 typedef basic_ostream<char> ostream; ///< @isiosfwd 131 typedef basic_iostream<char> iostream; ///< @isiosfwd 132 typedef basic_stringbuf<char> stringbuf; ///< @isiosfwd 133 typedef basic_istringstream<char> istringstream; ///< @isiosfwd 134 typedef basic_ostringstream<char> ostringstream; ///< @isiosfwd 135 typedef basic_stringstream<char> stringstream; ///< @isiosfwd 136 typedef basic_filebuf<char> filebuf; ///< @isiosfwd 137 typedef basic_ifstream<char> ifstream; ///< @isiosfwd 138 typedef basic_ofstream<char> ofstream; ///< @isiosfwd 139 typedef basic_fstream<char> fstream; ///< @isiosfwd 140 141 #ifdef _GLIBCXX_USE_WCHAR_T 142 typedef basic_ios<wchar_t> wios; ///< @isiosfwd 143 typedef basic_streambuf<wchar_t> wstreambuf; ///< @isiosfwd 144 typedef basic_istream<wchar_t> wistream; ///< @isiosfwd 145 typedef basic_ostream<wchar_t> wostream; ///< @isiosfwd 146 typedef basic_iostream<wchar_t> wiostream; ///< @isiosfwd 147 typedef basic_stringbuf<wchar_t> wstringbuf; ///< @isiosfwd 148 typedef basic_istringstream<wchar_t> wistringstream; ///< @isiosfwd 149 typedef basic_ostringstream<wchar_t> wostringstream; ///< @isiosfwd 150 typedef basic_stringstream<wchar_t> wstringstream; ///< @isiosfwd 151 typedef basic_filebuf<wchar_t> wfilebuf; ///< @isiosfwd 152 typedef basic_ifstream<wchar_t> wifstream; ///< @isiosfwd 153 typedef basic_ofstream<wchar_t> wofstream; ///< @isiosfwd 154 typedef basic_fstream<wchar_t> wfstream; ///< @isiosfwd 155 #endif 156 /** @} */ 157 158 _GLIBCXX_END_NAMESPACE 159 160 #endif /* _GLIBCXX_IOSFWD */ 161
