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 0 : 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 */
|