--- /dev/null
+// Forwarding declarations -*- C++ -*-
+
+// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
+// 2006, 2007, 2009
+// 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 iosfwd
+ * This is a Standard C++ Library header.
+ */
+
+//
+// ISO C++ 14882: 27.2 Forward declarations
+//
+
+#ifndef _GLIBCXX_IOSFWD
+#define _GLIBCXX_IOSFWD 1
+
+#pragma GCC system_header
+
+#include <bits/c++config.h>
+#include <bits/stringfwd.h> // For string forward declarations.
+#include <bits/postypes.h>
+
+_GLIBCXX_BEGIN_NAMESPACE(std)
+
+ template<typename _CharT, typename _Traits = char_traits<_CharT> >
+ class basic_ios;
+
+ template<typename _CharT, typename _Traits = char_traits<_CharT> >
+ class basic_streambuf;
+
+ template<typename _CharT, typename _Traits = char_traits<_CharT> >
+ class basic_istream;
+
+ template<typename _CharT, typename _Traits = char_traits<_CharT> >
+ class basic_ostream;
+
+ template<typename _CharT, typename _Traits = char_traits<_CharT> >
+ class basic_iostream;
+
+ template<typename _CharT, typename _Traits = char_traits<_CharT>,
+ typename _Alloc = allocator<_CharT> >
+ class basic_stringbuf;
+
+ template<typename _CharT, typename _Traits = char_traits<_CharT>,
+ typename _Alloc = allocator<_CharT> >
+ class basic_istringstream;
+
+ template<typename _CharT, typename _Traits = char_traits<_CharT>,
+ typename _Alloc = allocator<_CharT> >
+ class basic_ostringstream;
+
+ template<typename _CharT, typename _Traits = char_traits<_CharT>,
+ typename _Alloc = allocator<_CharT> >
+ class basic_stringstream;
+
+ template<typename _CharT, typename _Traits = char_traits<_CharT> >
+ class basic_filebuf;
+
+ template<typename _CharT, typename _Traits = char_traits<_CharT> >
+ class basic_ifstream;
+
+ template<typename _CharT, typename _Traits = char_traits<_CharT> >
+ class basic_ofstream;
+
+ template<typename _CharT, typename _Traits = char_traits<_CharT> >
+ class basic_fstream;
+
+ template<typename _CharT, typename _Traits = char_traits<_CharT> >
+ class istreambuf_iterator;
+
+ template<typename _CharT, typename _Traits = char_traits<_CharT> >
+ class ostreambuf_iterator;
+
+ // _GLIBCXX_RESOLVE_LIB_DEFECTS
+ // Not included. (??? Apparently no LWG number?)
+ class ios_base;
+
+ /**
+ * @defgroup io I/O
+ *
+ * Nearly all of the I/O classes are parameterized on the type of
+ * characters they read and write. (The major exception is ios_base at
+ * the top of the hierarchy.) This is a change from pre-Standard
+ * streams, which were not templates.
+ *
+ * For ease of use and compatibility, all of the basic_* I/O-related
+ * classes are given typedef names for both of the builtin character
+ * widths (wide and narrow). The typedefs are the same as the
+ * pre-Standard names, for example:
+ *
+ * @code
+ * typedef basic_ifstream<char> ifstream;
+ * @endcode
+ *
+ * Because properly forward-declaring these classes can be difficult, you
+ * should not do it yourself. Instead, include the <iosfwd>
+ * header, which contains only declarations of all the I/O classes as
+ * well as the typedefs. Trying to forward-declare the typedefs
+ * themselves (e.g., "class ostream;") is not valid ISO C++.
+ *
+ * For more specific declarations, see
+ * http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch24.html
+ *
+ * @{
+ */
+ typedef basic_ios<char> ios; ///< @isiosfwd
+ typedef basic_streambuf<char> streambuf; ///< @isiosfwd
+ typedef basic_istream<char> istream; ///< @isiosfwd
+ typedef basic_ostream<char> ostream; ///< @isiosfwd
+ typedef basic_iostream<char> iostream; ///< @isiosfwd
+ typedef basic_stringbuf<char> stringbuf; ///< @isiosfwd
+ typedef basic_istringstream<char> istringstream; ///< @isiosfwd
+ typedef basic_ostringstream<char> ostringstream; ///< @isiosfwd
+ typedef basic_stringstream<char> stringstream; ///< @isiosfwd
+ typedef basic_filebuf<char> filebuf; ///< @isiosfwd
+ typedef basic_ifstream<char> ifstream; ///< @isiosfwd
+ typedef basic_ofstream<char> ofstream; ///< @isiosfwd
+ typedef basic_fstream<char> fstream; ///< @isiosfwd
+
+#ifdef _GLIBCXX_USE_WCHAR_T
+ typedef basic_ios<wchar_t> wios; ///< @isiosfwd
+ typedef basic_streambuf<wchar_t> wstreambuf; ///< @isiosfwd
+ typedef basic_istream<wchar_t> wistream; ///< @isiosfwd
+ typedef basic_ostream<wchar_t> wostream; ///< @isiosfwd
+ typedef basic_iostream<wchar_t> wiostream; ///< @isiosfwd
+ typedef basic_stringbuf<wchar_t> wstringbuf; ///< @isiosfwd
+ typedef basic_istringstream<wchar_t> wistringstream; ///< @isiosfwd
+ typedef basic_ostringstream<wchar_t> wostringstream; ///< @isiosfwd
+ typedef basic_stringstream<wchar_t> wstringstream; ///< @isiosfwd
+ typedef basic_filebuf<wchar_t> wfilebuf; ///< @isiosfwd
+ typedef basic_ifstream<wchar_t> wifstream; ///< @isiosfwd
+ typedef basic_ofstream<wchar_t> wofstream; ///< @isiosfwd
+ typedef basic_fstream<wchar_t> wfstream; ///< @isiosfwd
+#endif
+ /** @} */
+
+_GLIBCXX_END_NAMESPACE
+
+#endif /* _GLIBCXX_IOSFWD */
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