1// Forwarding declarations -*- C++ -*- 2 3// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 4// 2006, 2007, 2009, 2010 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 /** 47 * @defgroup io I/O 48 * 49 * Nearly all of the I/O classes are parameterized on the type of 50 * characters they read and write. (The major exception is ios_base at 51 * the top of the hierarchy.) This is a change from pre-Standard 52 * streams, which were not templates. 53 * 54 * For ease of use and compatibility, all of the basic_* I/O-related 55 * classes are given typedef names for both of the builtin character 56 * widths (wide and narrow). The typedefs are the same as the 57 * pre-Standard names, for example: 58 * 59 * @code 60 * typedef basic_ifstream<char> ifstream; 61 * @endcode 62 * 63 * Because properly forward-declaring these classes can be difficult, you 64 * should not do it yourself. Instead, include the <iosfwd> 65 * header, which contains only declarations of all the I/O classes as 66 * well as the typedefs. Trying to forward-declare the typedefs 67 * themselves (e.g., <code>class ostream;</code>) is not valid ISO C++. 68 * 69 * For more specific declarations, see 70 * http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch24.html 71 * 72 * @{ 73 */ 74 class ios_base; 75 76 template<typename _CharT, typename _Traits = char_traits<_CharT> > 77 class basic_ios; 78 79 template<typename _CharT, typename _Traits = char_traits<_CharT> > 80 class basic_streambuf; 81 82 template<typename _CharT, typename _Traits = char_traits<_CharT> > 83 class basic_istream; 84 85 template<typename _CharT, typename _Traits = char_traits<_CharT> > 86 class basic_ostream; 87 88 template<typename _CharT, typename _Traits = char_traits<_CharT> > 89 class basic_iostream; 90 91 template<typename _CharT, typename _Traits = char_traits<_CharT>, 92 typename _Alloc = allocator<_CharT> > 93 class basic_stringbuf; 94 95 template<typename _CharT, typename _Traits = char_traits<_CharT>, 96 typename _Alloc = allocator<_CharT> > 97 class basic_istringstream; 98 99 template<typename _CharT, typename _Traits = char_traits<_CharT>, 100 typename _Alloc = allocator<_CharT> > 101 class basic_ostringstream; 102 103 template<typename _CharT, typename _Traits = char_traits<_CharT>, 104 typename _Alloc = allocator<_CharT> > 105 class basic_stringstream; 106 107 template<typename _CharT, typename _Traits = char_traits<_CharT> > 108 class basic_filebuf; 109 110 template<typename _CharT, typename _Traits = char_traits<_CharT> > 111 class basic_ifstream; 112 113 template<typename _CharT, typename _Traits = char_traits<_CharT> > 114 class basic_ofstream; 115 116 template<typename _CharT, typename _Traits = char_traits<_CharT> > 117 class basic_fstream; 118 119 template<typename _CharT, typename _Traits = char_traits<_CharT> > 120 class istreambuf_iterator; 121 122 template<typename _CharT, typename _Traits = char_traits<_CharT> > 123 class ostreambuf_iterator; 124 125 // _GLIBCXX_RESOLVE_LIB_DEFECTS 126 // Not included. (??? Apparently no LWG number?) 127 128 typedef basic_ios<char> ios; ///< @isiosfwd 129 typedef basic_streambuf<char> streambuf; ///< @isiosfwd 130 typedef basic_istream<char> istream; ///< @isiosfwd 131 typedef basic_ostream<char> ostream; ///< @isiosfwd 132 typedef basic_iostream<char> iostream; ///< @isiosfwd 133 typedef basic_stringbuf<char> stringbuf; ///< @isiosfwd 134 typedef basic_istringstream<char> istringstream; ///< @isiosfwd 135 typedef basic_ostringstream<char> ostringstream; ///< @isiosfwd 136 typedef basic_stringstream<char> stringstream; ///< @isiosfwd 137 typedef basic_filebuf<char> filebuf; ///< @isiosfwd 138 typedef basic_ifstream<char> ifstream; ///< @isiosfwd 139 typedef basic_ofstream<char> ofstream; ///< @isiosfwd 140 typedef basic_fstream<char> fstream; ///< @isiosfwd 141 142#ifdef _GLIBCXX_USE_WCHAR_T 143 typedef basic_ios<wchar_t> wios; ///< @isiosfwd 144 typedef basic_streambuf<wchar_t> wstreambuf; ///< @isiosfwd 145 typedef basic_istream<wchar_t> wistream; ///< @isiosfwd 146 typedef basic_ostream<wchar_t> wostream; ///< @isiosfwd 147 typedef basic_iostream<wchar_t> wiostream; ///< @isiosfwd 148 typedef basic_stringbuf<wchar_t> wstringbuf; ///< @isiosfwd 149 typedef basic_istringstream<wchar_t> wistringstream; ///< @isiosfwd 150 typedef basic_ostringstream<wchar_t> wostringstream; ///< @isiosfwd 151 typedef basic_stringstream<wchar_t> wstringstream; ///< @isiosfwd 152 typedef basic_filebuf<wchar_t> wfilebuf; ///< @isiosfwd 153 typedef basic_ifstream<wchar_t> wifstream; ///< @isiosfwd 154 typedef basic_ofstream<wchar_t> wofstream; ///< @isiosfwd 155 typedef basic_fstream<wchar_t> wfstream; ///< @isiosfwd 156#endif 157 /** @} */ 158 159_GLIBCXX_END_NAMESPACE 160 161#endif /* _GLIBCXX_IOSFWD */ 162