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1 : : // Forwarding declarations -*- C++ -*-
2 : :
3 : : // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
4 : : // 2006, 2007
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 2, 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 : : // You should have received a copy of the GNU General Public License
19 : : // along with this library; see the file COPYING. If not, write to
20 : : // the Free Software Foundation, 51 Franklin Street, Fifth Floor,
21 : : // Boston, MA 02110-1301, USA.
22 : :
23 : : // As a special exception, you may use this file as part of a free software
24 : : // library without restriction. Specifically, if other files instantiate
25 : : // templates or use macros or inline functions from this file, or you compile
26 : : // this file and link it with other files to produce an executable, this
27 : : // file does not by itself cause the resulting executable to be covered by
28 : : // the GNU General Public License. This exception does not however
29 : : // invalidate any other reasons why the executable file might be covered by
30 : : // the GNU General Public License.
31 : :
32 : : /** @file iosfwd
33 : : * This is a Standard C++ Library header.
34 : : */
35 : :
36 : : //
37 : : // ISO C++ 14882: 27.2 Forward declarations
38 : : //
39 : :
40 : : #ifndef _GLIBCXX_IOSFWD
41 : : #define _GLIBCXX_IOSFWD 1
42 : :
43 : : #pragma GCC system_header
44 : :
45 : : #include <bits/c++config.h>
46 : : #include <bits/stringfwd.h> // For string forward declarations.
47 : : #include <bits/postypes.h>
48 : :
49 : : _GLIBCXX_BEGIN_NAMESPACE(std)
50 : :
51 : : template<typename _CharT, typename _Traits = char_traits<_CharT> >
52 : : class basic_ios;
53 : :
54 : : template<typename _CharT, typename _Traits = char_traits<_CharT> >
55 : : class basic_streambuf;
56 : :
57 : : template<typename _CharT, typename _Traits = char_traits<_CharT> >
58 : : class basic_istream;
59 : :
60 : : template<typename _CharT, typename _Traits = char_traits<_CharT> >
61 : : class basic_ostream;
62 : :
63 : : template<typename _CharT, typename _Traits = char_traits<_CharT> >
64 : : class basic_iostream;
65 : :
66 : : template<typename _CharT, typename _Traits = char_traits<_CharT>,
67 : : typename _Alloc = allocator<_CharT> >
68 [ - + ]: 260209 : class basic_stringbuf;
69 : :
70 : : template<typename _CharT, typename _Traits = char_traits<_CharT>,
71 : : typename _Alloc = allocator<_CharT> >
72 : : class basic_istringstream;
73 : :
74 : : template<typename _CharT, typename _Traits = char_traits<_CharT>,
75 : : typename _Alloc = allocator<_CharT> >
76 : : class basic_ostringstream;
77 : :
78 : : template<typename _CharT, typename _Traits = char_traits<_CharT>,
79 : : typename _Alloc = allocator<_CharT> >
80 : : class basic_stringstream;
81 : :
82 : : template<typename _CharT, typename _Traits = char_traits<_CharT> >
83 : : class basic_filebuf;
84 : :
85 : : template<typename _CharT, typename _Traits = char_traits<_CharT> >
86 : : class basic_ifstream;
87 : :
88 : : template<typename _CharT, typename _Traits = char_traits<_CharT> >
89 : : class basic_ofstream;
90 : :
91 : : template<typename _CharT, typename _Traits = char_traits<_CharT> >
92 : : class basic_fstream;
93 : :
94 : : template<typename _CharT, typename _Traits = char_traits<_CharT> >
95 : : class istreambuf_iterator;
96 : :
97 : : template<typename _CharT, typename _Traits = char_traits<_CharT> >
98 : : class ostreambuf_iterator;
99 : :
100 : : // _GLIBCXX_RESOLVE_LIB_DEFECTS
101 : : // Not included. (??? Apparently no LWG number?)
102 : : class ios_base;
103 : :
104 : : /**
105 : : * @defgroup s27_2_iosfwd I/O Forward Declarations
106 : : *
107 : : * Nearly all of the I/O classes are parameterized on the type of
108 : : * characters they read and write. (The major exception is ios_base at
109 : : * the top of the hierarchy.) This is a change from pre-Standard
110 : : * streams, which were not templates.
111 : : *
112 : : * For ease of use and compatibility, all of the basic_* I/O-related
113 : : * classes are given typedef names for both of the builtin character
114 : : * widths (wide and narrow). The typedefs are the same as the
115 : : * pre-Standard names, for example:
116 : : *
117 : : * @code
118 : : * typedef basic_ifstream<char> ifstream;
119 : : * @endcode
120 : : *
121 : : * Because properly forward-declaring these classes can be difficult, you
122 : : * should not do it yourself. Instead, include the <iosfwd>
123 : : * header, which contains only declarations of all the I/O classes as
124 : : * well as the typedefs. Trying to forward-declare the typedefs
125 : : * themselves (e.g., "class ostream;") is not valid ISO C++.
126 : : *
127 : : * For more specific declarations, see
128 : : * http://gcc.gnu.org/onlinedocs/libstdc++/27_io/howto.html#10
129 : : *
130 : : * @{
131 : : */
132 : : typedef basic_ios<char> ios; ///< @isiosfwd
133 : : typedef basic_streambuf<char> streambuf; ///< @isiosfwd
134 : : typedef basic_istream<char> istream; ///< @isiosfwd
135 : : typedef basic_ostream<char> ostream; ///< @isiosfwd
136 : : typedef basic_iostream<char> iostream; ///< @isiosfwd
137 : : typedef basic_stringbuf<char> stringbuf; ///< @isiosfwd
138 : : typedef basic_istringstream<char> istringstream; ///< @isiosfwd
139 : : typedef basic_ostringstream<char> ostringstream; ///< @isiosfwd
140 : : typedef basic_stringstream<char> stringstream; ///< @isiosfwd
141 : : typedef basic_filebuf<char> filebuf; ///< @isiosfwd
142 : : typedef basic_ifstream<char> ifstream; ///< @isiosfwd
143 : : typedef basic_ofstream<char> ofstream; ///< @isiosfwd
144 : : typedef basic_fstream<char> fstream; ///< @isiosfwd
145 : :
146 : : #ifdef _GLIBCXX_USE_WCHAR_T
147 : : typedef basic_ios<wchar_t> wios; ///< @isiosfwd
148 : : typedef basic_streambuf<wchar_t> wstreambuf; ///< @isiosfwd
149 : : typedef basic_istream<wchar_t> wistream; ///< @isiosfwd
150 : : typedef basic_ostream<wchar_t> wostream; ///< @isiosfwd
151 : : typedef basic_iostream<wchar_t> wiostream; ///< @isiosfwd
152 : : typedef basic_stringbuf<wchar_t> wstringbuf; ///< @isiosfwd
153 : : typedef basic_istringstream<wchar_t> wistringstream; ///< @isiosfwd
154 : : typedef basic_ostringstream<wchar_t> wostringstream; ///< @isiosfwd
155 : : typedef basic_stringstream<wchar_t> wstringstream; ///< @isiosfwd
156 : : typedef basic_filebuf<wchar_t> wfilebuf; ///< @isiosfwd
157 : : typedef basic_ifstream<wchar_t> wifstream; ///< @isiosfwd
158 : : typedef basic_ofstream<wchar_t> wofstream; ///< @isiosfwd
159 : : typedef basic_fstream<wchar_t> wfstream; ///< @isiosfwd
160 : : #endif
161 : : /** @} */
162 : :
163 : : _GLIBCXX_END_NAMESPACE
164 : :
165 : : #endif /* _GLIBCXX_IOSFWD */
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