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  • iostream源码

    // Standard iostream objects -*- C++ -*-

    // Copyright (C) 1997-2015 Free Software Foundation, Inc.
    //
    // This file is part of the GNU ISO C++ Library. This library is free
    // software; you can redistribute it and/or modify it under the
    // terms of the GNU General Public License as published by the
    // Free Software Foundation; either version 3, or (at your option)
    // any later version.

    // This library is distributed in the hope that it will be useful,
    // but WITHOUT ANY WARRANTY; without even the implied warranty of
    // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    // GNU General Public License for more details.

    // Under Section 7 of GPL version 3, you are granted additional
    // permissions described in the GCC Runtime Library Exception, version
    // 3.1, as published by the Free Software Foundation.

    // You should have received a copy of the GNU General Public License and
    // a copy of the GCC Runtime Library Exception along with this program;
    // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
    // <http://www.gnu.org/licenses/>.

    /** @file include/iostream
    * This is a Standard C++ Library header.
    */

    //
    // ISO C++ 14882: 27.3 Standard iostream objects
    //

    #ifndef _GLIBCXX_IOSTREAM
    #define _GLIBCXX_IOSTREAM 1

    #pragma GCC system_header

    #include <bits/c++config.h>

    ///

    ///

    ///

    ////
    #include <ostream>
    #include <istream>

    namespace std _GLIBCXX_VISIBILITY(default)
    {
    _GLIBCXX_BEGIN_NAMESPACE_VERSION

    /**
    * @name Standard Stream Objects
    *
    * The &lt;iostream&gt; header declares the eight <em>standard stream
    * objects</em>. For other declarations, see
    * http://gcc.gnu.org/onlinedocs/libstdc++/manual/io.html
    * and the @link iosfwd I/O forward declarations @endlink
    *
    * They are required by default to cooperate with the global C
    * library's @c FILE streams, and to be available during program
    * startup and termination. For more information, see the section of the
    * manual linked to above.
    */
    //@{
    extern istream cin; /// Linked to standard input
    extern ostream cout; /// Linked to standard output
    extern ostream cerr; /// Linked to standard error (unbuffered)
    extern ostream clog; /// Linked to standard error (buffered)

    #ifdef _GLIBCXX_USE_WCHAR_T
    extern wistream wcin; /// Linked to standard input
    extern wostream wcout; /// Linked to standard output
    extern wostream wcerr; /// Linked to standard error (unbuffered)
    extern wostream wclog; /// Linked to standard error (buffered)
    #endif
    //@}

    // For construction of filebuffers for cout, cin, cerr, clog et. al.
    static ios_base::Init __ioinit;

    _GLIBCXX_END_NAMESPACE_VERSION
    } // namespace

    #endif /* _GLIBCXX_IOSTREAM */

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  • 原文地址:https://www.cnblogs.com/fenglongyu/p/8655080.html
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