libstdc++
iostream
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1 // Standard iostream objects -*- C++ -*-
2 
3 // Copyright (C) 1997-2017 Free Software Foundation, Inc.
4 //
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
9 // any later version.
10 
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
15 
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
19 
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
24 
25 /** @file include/iostream
26  * This is a Standard C++ Library header.
27  */
28 
29 //
30 // ISO C++ 14882: 27.3 Standard iostream objects
31 //
32 
33 #ifndef _GLIBCXX_IOSTREAM
34 #define _GLIBCXX_IOSTREAM 1
35 
36 #pragma GCC system_header
37 
38 #include <bits/c++config.h>
39 #include <ostream>
40 #include <istream>
41 
42 namespace std _GLIBCXX_VISIBILITY(default)
43 {
44 _GLIBCXX_BEGIN_NAMESPACE_VERSION
45 
46  /**
47  * @name Standard Stream Objects
48  *
49  * The &lt;iostream&gt; header declares the eight <em>standard stream
50  * objects</em>. For other declarations, see
51  * http://gcc.gnu.org/onlinedocs/libstdc++/manual/io.html
52  * and the @link iosfwd I/O forward declarations @endlink
53  *
54  * They are required by default to cooperate with the global C
55  * library's @c FILE streams, and to be available during program
56  * startup and termination. For more information, see the section of the
57  * manual linked to above.
58  */
59  //@{
60  extern istream cin; /// Linked to standard input
61  extern ostream cout; /// Linked to standard output
62  extern ostream cerr; /// Linked to standard error (unbuffered)
63  extern ostream clog; /// Linked to standard error (buffered)
64 
65 #ifdef _GLIBCXX_USE_WCHAR_T
66  extern wistream wcin; /// Linked to standard input
67  extern wostream wcout; /// Linked to standard output
68  extern wostream wcerr; /// Linked to standard error (unbuffered)
69  extern wostream wclog; /// Linked to standard error (buffered)
70 #endif
71  //@}
72 
73  // For construction of filebuffers for cout, cin, cerr, clog et. al.
74  static ios_base::Init __ioinit;
75 
76 _GLIBCXX_END_NAMESPACE_VERSION
77 } // namespace
78 
79 #endif /* _GLIBCXX_IOSTREAM */
ostream cout
Linked to standard input.
ostream cerr
Linked to standard output.
wostream wclog
Linked to standard error (unbuffered)
wistream wcin
Linked to standard error (buffered)
wostream wcout
Linked to standard input.
wostream wcerr
Linked to standard output.
basic_istream< char > istream
Base class for char input streams.
Definition: iosfwd:138
static ios_base::Init __ioinit
Linked to standard error (buffered)
Definition: iostream:74
istream cin
Linked to standard input.
basic_ostream< char > ostream
Base class for char output streams.
Definition: iosfwd:141
basic_istream< wchar_t > wistream
Base class for wchar_t input streams.
Definition: iosfwd:178
basic_ostream< wchar_t > wostream
Base class for wchar_t output streams.
Definition: iosfwd:181
ostream clog
Linked to standard error (unbuffered)