1// Standard iostream objects -*- C++ -*- 2 3// Copyright (C) 1997-2019 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 42namespace std _GLIBCXX_VISIBILITY(default) 43{ 44_GLIBCXX_BEGIN_NAMESPACE_VERSION 45 46 /** 47 * @name Standard Stream Objects 48 * 49 * The <iostream> 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 */ 80