216 lines
6.8 KiB
C++
216 lines
6.8 KiB
C++
// <iosfwd> Forward declarations -*- C++ -*-
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// Copyright (C) 1997-2017 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/** @file include/iosfwd
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* This is a Standard C++ Library header.
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*/
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//
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// ISO C++ 14882: 27.2 Forward declarations
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//
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#ifndef _GLIBCXX_IOSFWD
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#define _GLIBCXX_IOSFWD 1
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#pragma GCC system_header
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#include <bits/c++config.h>
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#include <bits/stringfwd.h> // For string forward declarations.
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#include <bits/postypes.h>
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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/**
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* @defgroup io I/O
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*
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* Nearly all of the I/O classes are parameterized on the type of
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* characters they read and write. (The major exception is ios_base at
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* the top of the hierarchy.) This is a change from pre-Standard
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* streams, which were not templates.
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*
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* For ease of use and compatibility, all of the basic_* I/O-related
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* classes are given typedef names for both of the builtin character
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* widths (wide and narrow). The typedefs are the same as the
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* pre-Standard names, for example:
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*
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* @code
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* typedef basic_ifstream<char> ifstream;
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* @endcode
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*
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* Because properly forward-declaring these classes can be difficult, you
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* should not do it yourself. Instead, include the <iosfwd>
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* header, which contains only declarations of all the I/O classes as
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* well as the typedefs. Trying to forward-declare the typedefs
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* themselves (e.g., <code>class ostream;</code>) is not valid ISO C++.
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*
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* For more specific declarations, see
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* https://gcc.gnu.org/onlinedocs/libstdc++/manual/io.html#std.io.objects
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*
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* @{
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*/
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class ios_base;
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template<typename _CharT, typename _Traits = char_traits<_CharT> >
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class basic_ios;
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template<typename _CharT, typename _Traits = char_traits<_CharT> >
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class basic_streambuf;
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template<typename _CharT, typename _Traits = char_traits<_CharT> >
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class basic_istream;
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template<typename _CharT, typename _Traits = char_traits<_CharT> >
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class basic_ostream;
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template<typename _CharT, typename _Traits = char_traits<_CharT> >
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class basic_iostream;
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_GLIBCXX_BEGIN_NAMESPACE_CXX11
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template<typename _CharT, typename _Traits = char_traits<_CharT>,
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typename _Alloc = allocator<_CharT> >
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class basic_stringbuf;
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template<typename _CharT, typename _Traits = char_traits<_CharT>,
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typename _Alloc = allocator<_CharT> >
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class basic_istringstream;
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template<typename _CharT, typename _Traits = char_traits<_CharT>,
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typename _Alloc = allocator<_CharT> >
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class basic_ostringstream;
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template<typename _CharT, typename _Traits = char_traits<_CharT>,
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typename _Alloc = allocator<_CharT> >
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class basic_stringstream;
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_GLIBCXX_END_NAMESPACE_CXX11
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template<typename _CharT, typename _Traits = char_traits<_CharT> >
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class basic_filebuf;
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template<typename _CharT, typename _Traits = char_traits<_CharT> >
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class basic_ifstream;
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template<typename _CharT, typename _Traits = char_traits<_CharT> >
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class basic_ofstream;
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template<typename _CharT, typename _Traits = char_traits<_CharT> >
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class basic_fstream;
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template<typename _CharT, typename _Traits = char_traits<_CharT> >
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class istreambuf_iterator;
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template<typename _CharT, typename _Traits = char_traits<_CharT> >
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class ostreambuf_iterator;
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/// Base class for @c char streams.
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typedef basic_ios<char> ios;
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/// Base class for @c char buffers.
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typedef basic_streambuf<char> streambuf;
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/// Base class for @c char input streams.
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typedef basic_istream<char> istream;
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/// Base class for @c char output streams.
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typedef basic_ostream<char> ostream;
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/// Base class for @c char mixed input and output streams.
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typedef basic_iostream<char> iostream;
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/// Class for @c char memory buffers.
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typedef basic_stringbuf<char> stringbuf;
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/// Class for @c char input memory streams.
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typedef basic_istringstream<char> istringstream;
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/// Class for @c char output memory streams.
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typedef basic_ostringstream<char> ostringstream;
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/// Class for @c char mixed input and output memory streams.
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typedef basic_stringstream<char> stringstream;
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/// Class for @c char file buffers.
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typedef basic_filebuf<char> filebuf;
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/// Class for @c char input file streams.
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typedef basic_ifstream<char> ifstream;
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/// Class for @c char output file streams.
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typedef basic_ofstream<char> ofstream;
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/// Class for @c char mixed input and output file streams.
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typedef basic_fstream<char> fstream;
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#ifdef _GLIBCXX_USE_WCHAR_T
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/// Base class for @c wchar_t streams.
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typedef basic_ios<wchar_t> wios;
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/// Base class for @c wchar_t buffers.
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typedef basic_streambuf<wchar_t> wstreambuf;
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/// Base class for @c wchar_t input streams.
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typedef basic_istream<wchar_t> wistream;
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/// Base class for @c wchar_t output streams.
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typedef basic_ostream<wchar_t> wostream;
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/// Base class for @c wchar_t mixed input and output streams.
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typedef basic_iostream<wchar_t> wiostream;
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/// Class for @c wchar_t memory buffers.
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typedef basic_stringbuf<wchar_t> wstringbuf;
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/// Class for @c wchar_t input memory streams.
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typedef basic_istringstream<wchar_t> wistringstream;
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/// Class for @c wchar_t output memory streams.
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typedef basic_ostringstream<wchar_t> wostringstream;
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/// Class for @c wchar_t mixed input and output memory streams.
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typedef basic_stringstream<wchar_t> wstringstream;
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/// Class for @c wchar_t file buffers.
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typedef basic_filebuf<wchar_t> wfilebuf;
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/// Class for @c wchar_t input file streams.
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typedef basic_ifstream<wchar_t> wifstream;
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/// Class for @c wchar_t output file streams.
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typedef basic_ofstream<wchar_t> wofstream;
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/// Class for @c wchar_t mixed input and output file streams.
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typedef basic_fstream<wchar_t> wfstream;
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#endif
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/** @} */
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_GLIBCXX_END_NAMESPACE_VERSION
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} // namespace
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#endif /* _GLIBCXX_IOSFWD */
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