1 // Forwarding declarations -*- C++ -*-
3 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
4 // 2006, 2007, 2009, 2010
5 // Free Software Foundation, Inc.
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)
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.
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.
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/>.
28 * This is a Standard C++ Library header.
32 // ISO C++ 14882: 27.2 Forward declarations
35 #ifndef _GLIBCXX_IOSFWD
36 #define _GLIBCXX_IOSFWD 1
38 #pragma GCC system_header
40 #include <bits/c++config.h>
41 #include <bits/stringfwd.h> // For string forward declarations.
42 #include <bits/postypes.h>
44 _GLIBCXX_BEGIN_NAMESPACE(std)
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.
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:
60 * typedef basic_ifstream<char> ifstream;
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++.
69 * For more specific declarations, see
70 * http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch24.html
76 template<typename _CharT, typename _Traits = char_traits<_CharT> >
79 template<typename _CharT, typename _Traits = char_traits<_CharT> >
80 class basic_streambuf;
82 template<typename _CharT, typename _Traits = char_traits<_CharT> >
85 template<typename _CharT, typename _Traits = char_traits<_CharT> >
88 template<typename _CharT, typename _Traits = char_traits<_CharT> >
91 template<typename _CharT, typename _Traits = char_traits<_CharT>,
92 typename _Alloc = allocator<_CharT> >
93 class basic_stringbuf;
95 template<typename _CharT, typename _Traits = char_traits<_CharT>,
96 typename _Alloc = allocator<_CharT> >
97 class basic_istringstream;
99 template<typename _CharT, typename _Traits = char_traits<_CharT>,
100 typename _Alloc = allocator<_CharT> >
101 class basic_ostringstream;
103 template<typename _CharT, typename _Traits = char_traits<_CharT>,
104 typename _Alloc = allocator<_CharT> >
105 class basic_stringstream;
107 template<typename _CharT, typename _Traits = char_traits<_CharT> >
110 template<typename _CharT, typename _Traits = char_traits<_CharT> >
111 class basic_ifstream;
113 template<typename _CharT, typename _Traits = char_traits<_CharT> >
114 class basic_ofstream;
116 template<typename _CharT, typename _Traits = char_traits<_CharT> >
119 template<typename _CharT, typename _Traits = char_traits<_CharT> >
120 class istreambuf_iterator;
122 template<typename _CharT, typename _Traits = char_traits<_CharT> >
123 class ostreambuf_iterator;
125 // _GLIBCXX_RESOLVE_LIB_DEFECTS
126 // Not included. (??? Apparently no LWG number?)
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
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
159 _GLIBCXX_END_NAMESPACE
161 #endif /* _GLIBCXX_IOSFWD */