iostream

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00001 // Standard iostream objects -*- C++ -*-
00002 
00003 // Copyright (C) 1997, 1998, 1999, 2001, 2002, 2005, 2008, 2009
00004 // Free Software Foundation, Inc.
00005 //
00006 // This file is part of the GNU ISO C++ Library.  This library is free
00007 // software; you can redistribute it and/or modify it under the
00008 // terms of the GNU General Public License as published by the
00009 // Free Software Foundation; either version 3, or (at your option)
00010 // any later version.
00011 
00012 // This library is distributed in the hope that it will be useful,
00013 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00014 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015 // GNU General Public License for more details.
00016 
00017 // Under Section 7 of GPL version 3, you are granted additional
00018 // permissions described in the GCC Runtime Library Exception, version
00019 // 3.1, as published by the Free Software Foundation.
00020 
00021 // You should have received a copy of the GNU General Public License and
00022 // a copy of the GCC Runtime Library Exception along with this program;
00023 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
00024 // <http://www.gnu.org/licenses/>.
00025 
00026 /** @file iostream
00027  *  This is a Standard C++ Library header. 
00028  */
00029 
00030 //
00031 // ISO C++ 14882: 27.3  Standard iostream objects
00032 //
00033 
00034 #ifndef _GLIBCXX_IOSTREAM
00035 #define _GLIBCXX_IOSTREAM 1
00036 
00037 #pragma GCC system_header
00038 
00039 #include <bits/c++config.h>
00040 #include <ostream>
00041 #include <istream>
00042 
00043 _GLIBCXX_BEGIN_NAMESPACE(std)
00044 
00045   /**
00046    *  @name Standard Stream Objects
00047    *
00048    *  The &lt;iostream&gt; header declares the eight <em>standard stream
00049    *  objects</em>.  For other declarations, see
00050    *  http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch24.html
00051    *  and the @link iosfwd I/O forward declarations @endlink
00052    *
00053    *  They are required by default to cooperate with the global C library's
00054    *  @c FILE streams, and to be available during program startup and
00055    *  termination.  For more information, see the HOWTO linked to above.
00056   */
00057   //@{
00058   extern istream cin;       ///< Linked to standard input
00059   extern ostream cout;      ///< Linked to standard output
00060   extern ostream cerr;      ///< Linked to standard error (unbuffered)
00061   extern ostream clog;      ///< Linked to standard error (buffered)
00062 
00063 #ifdef _GLIBCXX_USE_WCHAR_T
00064   extern wistream wcin;     ///< Linked to standard input
00065   extern wostream wcout;    ///< Linked to standard output
00066   extern wostream wcerr;    ///< Linked to standard error (unbuffered)
00067   extern wostream wclog;    ///< Linked to standard error (buffered)
00068 #endif
00069   //@}
00070 
00071   // For construction of filebuffers for cout, cin, cerr, clog et. al.
00072   static ios_base::Init __ioinit;
00073 
00074 _GLIBCXX_END_NAMESPACE
00075 
00076 #endif /* _GLIBCXX_IOSTREAM */

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