iostream

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00001 // Standard iostream objects -*- C++ -*-
00002 
00003 // Copyright (C) 1997, 1998, 1999, 2001, 2002 Free Software Foundation, Inc.
00004 //
00005 // This file is part of the GNU ISO C++ Library.  This library is free
00006 // software; you can redistribute it and/or modify it under the
00007 // terms of the GNU General Public License as published by the
00008 // Free Software Foundation; either version 2, or (at your option)
00009 // any later version.
00010 
00011 // This library is distributed in the hope that it will be useful,
00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014 // GNU General Public License for more details.
00015 
00016 // You should have received a copy of the GNU General Public License along
00017 // with this library; see the file COPYING.  If not, write to the Free
00018 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
00019 // USA.
00020 
00021 // As a special exception, you may use this file as part of a free software
00022 // library without restriction.  Specifically, if other files instantiate
00023 // templates or use macros or inline functions from this file, or you compile
00024 // this file and link it with other files to produce an executable, this
00025 // file does not by itself cause the resulting executable to be covered by
00026 // the GNU General Public License.  This exception does not however
00027 // invalidate any other reasons why the executable file might be covered by
00028 // the GNU General Public License.
00029 
00030 //
00031 // ISO C++ 14882: 27.3  Standard iostream objects
00032 //
00033 
00034 /** @file iostream
00035  *  This is a Standard C++ Library header. 
00036  */
00037 
00038 #ifndef _GLIBCXX_IOSTREAM
00039 #define _GLIBCXX_IOSTREAM 1
00040 
00041 #pragma GCC system_header
00042 
00043 #include <bits/c++config.h>
00044 #include <ostream>
00045 #include <istream>
00046 
00047 namespace std 
00048 {
00049   /**
00050    *  @name Standard Stream Objects
00051    *
00052    *  The &lt;iostream&gt; header declares the eight <em>standard stream
00053    *  objects</em>.  For other declarations, see
00054    *  http://gcc.gnu.org/onlinedocs/libstdc++/27_io/howto.html#10 and the
00055    *  @link s27_2_iosfwd I/O forward declarations @endlink
00056    *
00057    *  They are required by default to cooperate with the global C library's
00058    *  @c FILE streams, and to be available during program startup and
00059    *  termination.  For more information, see the HOWTO linked to above.
00060   */
00061   //@{
00062   extern istream cin;       ///< Linked to standard input
00063   extern ostream cout;      ///< Linked to standard output
00064   extern ostream cerr;      ///< Linked to standard error (unbuffered)
00065   extern ostream clog;      ///< Linked to standard error (buffered)
00066 
00067 #ifdef _GLIBCXX_USE_WCHAR_T
00068   extern wistream wcin;     ///< Linked to standard input
00069   extern wostream wcout;    ///< Linked to standard output
00070   extern wostream wcerr;    ///< Linked to standard error (unbuffered)
00071   extern wostream wclog;    ///< Linked to standard error (buffered)
00072 #endif
00073   //@}
00074 
00075   // For construction of filebuffers for cout, cin, cerr, clog et. al.
00076   static ios_base::Init __ioinit;
00077 } // namespace std
00078 
00079 #endif /* _GLIBCXX_IOSTREAM */

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