# iosfwd

Go to the documentation of this file.

    00001 // Forwarding declarations -*- C++ -*-
    00002
    00003 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
    00004 // 2006, 2007, 2009, 2010
    00005 // Free Software Foundation, Inc.
    00006 //
    00007 // This file is part of the GNU ISO C++ Library.  This library is free
    00008 // software; you can redistribute it and/or modify it under the
    00009 // terms of the GNU General Public License as published by the
    00010 // Free Software Foundation; either version 3, or (at your option)
    00011 // any later version.
    00012
    00013 // This library is distributed in the hope that it will be useful,
    00014 // but WITHOUT ANY WARRANTY; without even the implied warranty of
    00015 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00016 // GNU General Public License for more details.
    00017
    00018 // Under Section 7 of GPL version 3, you are granted additional
    00019 // permissions described in the GCC Runtime Library Exception, version
    00020 // 3.1, as published by the Free Software Foundation.
    00021
    00022 // You should have received a copy of the GNU General Public License and
    00023 // a copy of the GCC Runtime Library Exception along with this program;
    00024 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
    00025 // <http://www.gnu.org/licenses/>.
    00026
    00027 /** @file iosfwd
    00028  *  This is a Standard C++ Library header.
    00029  */
    00030
    00031 //
    00032 // ISO C++ 14882: 27.2  Forward declarations
    00033 //
    00034
    00035 #ifndef _GLIBCXX_IOSFWD
    00036 #define _GLIBCXX_IOSFWD 1
    00037
    00038 #pragma GCC system_header
    00039
    00040 #include <bits/c++config.h>
    00041 #include <bits/stringfwd.h>     // For string forward declarations.
    00042 #include <bits/postypes.h>
    00043
    00044 _GLIBCXX_BEGIN_NAMESPACE(std)
    00045
    00046   /**
    00047    *  @defgroup io I/O
    00048    *
    00049    *  Nearly all of the I/O classes are parameterized on the type of
    00050    *  characters they read and write.  (The major exception is ios_base at
    00051    *  the top of the hierarchy.)  This is a change from pre-Standard
    00052    *  streams, which were not templates.
    00053    *
    00054    *  For ease of use and compatibility, all of the basic_* I/O-related
    00055    *  classes are given typedef names for both of the builtin character
    00056    *  widths (wide and narrow).  The typedefs are the same as the
    00057    *  pre-Standard names, for example:
    00058    *
    00059    *  @code
    00060    *     typedef basic_ifstream<char>  ifstream;
    00061    *  @endcode
    00062    *
    00063    *  Because properly forward-declaring these classes can be difficult, you
    00064    *  should not do it yourself.  Instead, include the &lt;iosfwd&gt;
    00065    *  header, which contains only declarations of all the I/O classes as
    00066    *  well as the typedefs.  Trying to forward-declare the typedefs
    00067    *  themselves (e.g., <code>class ostream;</code>) is not valid ISO C++.
    00068    *
    00069    *  For more specific declarations, see
    00070    *  http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch24.html
    00071    *
    00072    *  @{
    00073   */
    00074   class ios_base;
    00075
    00076   template<typename _CharT, typename _Traits = char_traits<_CharT> >
    00077     class basic_ios;
    00078
    00079   template<typename _CharT, typename _Traits = char_traits<_CharT> >
    00080     class basic_streambuf;
    00081
    00082   template<typename _CharT, typename _Traits = char_traits<_CharT> >
    00083     class basic_istream;
    00084
    00085   template<typename _CharT, typename _Traits = char_traits<_CharT> >
    00086     class basic_ostream;
    00087
    00088   template<typename _CharT, typename _Traits = char_traits<_CharT> >
    00089     class basic_iostream;
    00090
    00091   template<typename _CharT, typename _Traits = char_traits<_CharT>,
    00092         typename _Alloc = allocator<_CharT> >
    00093     class basic_stringbuf;
    00094
    00095   template<typename _CharT, typename _Traits = char_traits<_CharT>,
    00096        typename _Alloc = allocator<_CharT> >
    00097     class basic_istringstream;
    00098
    00099   template<typename _CharT, typename _Traits = char_traits<_CharT>,
    00100        typename _Alloc = allocator<_CharT> >
    00101     class basic_ostringstream;
    00102
    00103   template<typename _CharT, typename _Traits = char_traits<_CharT>,
    00104        typename _Alloc = allocator<_CharT> >
    00105     class basic_stringstream;
    00106
    00107   template<typename _CharT, typename _Traits = char_traits<_CharT> >
    00108     class basic_filebuf;
    00109
    00110   template<typename _CharT, typename _Traits = char_traits<_CharT> >
    00111     class basic_ifstream;
    00112
    00113   template<typename _CharT, typename _Traits = char_traits<_CharT> >
    00114     class basic_ofstream;
    00115
    00116   template<typename _CharT, typename _Traits = char_traits<_CharT> >
    00117     class basic_fstream;
    00118
    00119   template<typename _CharT, typename _Traits = char_traits<_CharT> >
    00120     class istreambuf_iterator;
    00121
    00122   template<typename _CharT, typename _Traits = char_traits<_CharT> >
    00123     class ostreambuf_iterator;
    00124
    00125   // _GLIBCXX_RESOLVE_LIB_DEFECTS
    00126   // Not included.   (??? Apparently no LWG number?)
    00127
    00128   typedef basic_ios<char>       ios;        ///< @isiosfwd
    00129   typedef basic_streambuf<char>     streambuf;  ///< @isiosfwd
    00130   typedef basic_istream<char>       istream;    ///< @isiosfwd
    00131   typedef basic_ostream<char>       ostream;    ///< @isiosfwd
    00132   typedef basic_iostream<char>      iostream;   ///< @isiosfwd
    00133   typedef basic_stringbuf<char>     stringbuf;  ///< @isiosfwd
    00134   typedef basic_istringstream<char>     istringstream;  ///< @isiosfwd
    00135   typedef basic_ostringstream<char>     ostringstream;  ///< @isiosfwd
    00136   typedef basic_stringstream<char>  stringstream;   ///< @isiosfwd
    00137   typedef basic_filebuf<char>       filebuf;    ///< @isiosfwd
    00138   typedef basic_ifstream<char>      ifstream;   ///< @isiosfwd
    00139   typedef basic_ofstream<char>      ofstream;   ///< @isiosfwd
    00140   typedef basic_fstream<char>       fstream;    ///< @isiosfwd
    00141
    00142 #ifdef _GLIBCXX_USE_WCHAR_T
    00143   typedef basic_ios<wchar_t>        wios;       ///< @isiosfwd
    00144   typedef basic_streambuf<wchar_t>  wstreambuf; ///< @isiosfwd
    00145   typedef basic_istream<wchar_t>    wistream;   ///< @isiosfwd
    00146   typedef basic_ostream<wchar_t>    wostream;   ///< @isiosfwd
    00147   typedef basic_iostream<wchar_t>   wiostream;  ///< @isiosfwd
    00148   typedef basic_stringbuf<wchar_t>  wstringbuf; ///< @isiosfwd
    00149   typedef basic_istringstream<wchar_t>  wistringstream; ///< @isiosfwd
    00150   typedef basic_ostringstream<wchar_t>  wostringstream; ///< @isiosfwd
    00151   typedef basic_stringstream<wchar_t>   wstringstream;  ///< @isiosfwd
    00152   typedef basic_filebuf<wchar_t>    wfilebuf;   ///< @isiosfwd
    00153   typedef basic_ifstream<wchar_t>   wifstream;  ///< @isiosfwd
    00154   typedef basic_ofstream<wchar_t>   wofstream;  ///< @isiosfwd
    00155   typedef basic_fstream<wchar_t>    wfstream;   ///< @isiosfwd
    00156 #endif
    00157   /** @}  */
    00158
    00159 _GLIBCXX_END_NAMESPACE
    00160
    00161 #endif /* _GLIBCXX_IOSFWD */