libcxx/include/iosfwd

// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCPP_IOSFWD
#define _LIBCPP_IOSFWD

/*
    iosfwd synopsis

namespace std
{

template<class charT> struct char_traits;
template<>            struct char_traits<char>;
template<>            struct char_traits<char8_t>;  // C++20
template<>            struct char_traits<char16_t>;
template<>            struct char_traits<char32_t>;
template<>            struct char_traits<wchar_t>;

template<class T>     class allocator;

template <class charT, class traits = char_traits<charT> > class basic_ios;

template <class charT, class traits = char_traits<charT> > class basic_streambuf;
template <class charT, class traits = char_traits<charT> > class basic_istream;
template <class charT, class traits = char_traits<charT> > class basic_ostream;
template <class charT, class traits = char_traits<charT> > class basic_iostream;

template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
    class basic_stringbuf;
template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
    class basic_istringstream;
template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
    class basic_ostringstream;
template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
    class basic_stringstream;

template <class charT, class traits = char_traits<charT> > class basic_filebuf;
template <class charT, class traits = char_traits<charT> > class basic_ifstream;
template <class charT, class traits = char_traits<charT> > class basic_ofstream;
template <class charT, class traits = char_traits<charT> > class basic_fstream;

template <class charT, class traits = char_traits<charT> > class istreambuf_iterator;
template <class charT, class traits = char_traits<charT> > class ostreambuf_iterator;

typedef basic_ios<char>              ios;
typedef basic_ios<wchar_t>           wios;

typedef basic_streambuf<char>        streambuf;
typedef basic_istream<char>          istream;
typedef basic_ostream<char>          ostream;
typedef basic_iostream<char>         iostream;

typedef basic_stringbuf<char>        stringbuf;
typedef basic_istringstream<char>    istringstream;
typedef basic_ostringstream<char>    ostringstream;
typedef basic_stringstream<char>     stringstream;

typedef basic_filebuf<char>          filebuf;
typedef basic_ifstream<char>         ifstream;
typedef basic_ofstream<char>         ofstream;
typedef basic_fstream<char>          fstream;

typedef basic_streambuf<wchar_t>     wstreambuf;
typedef basic_istream<wchar_t>       wistream;
typedef basic_ostream<wchar_t>       wostream;
typedef basic_iostream<wchar_t>      wiostream;

typedef basic_stringbuf<wchar_t>     wstringbuf;
typedef basic_istringstream<wchar_t> wistringstream;
typedef basic_ostringstream<wchar_t> wostringstream;
typedef basic_stringstream<wchar_t>  wstringstream;

typedef basic_filebuf<wchar_t>       wfilebuf;
typedef basic_ifstream<wchar_t>      wifstream;
typedef basic_ofstream<wchar_t>      wofstream;
typedef basic_fstream<wchar_t>       wfstream;

template <class state> class fpos;
using streampos  = fpos<char_traits<char>::state_type>;
using wstreampos = fpos<char_traits<wchar_t>::state_type>;
using u8streampos = fpos<char_traits<char8_t>::state_type>; // C++20
using u16streampos = fpos<char_traits<char16_t>::state_type>;
using u32streampos = fpos<char_traits<char32_t>::state_type>;

template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT>>
    class basic_syncbuf;                          // C++20

using syncbuf = basic_syncbuf<char>;              // C++20
using wsyncbuf = basic_syncbuf<wchar_t>;          // C++20

template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT>>
    class basic_osyncstream;                      // C++20

using osyncstream = basic_osyncstream<char>;      // C++20
using wosyncstream = basic_osyncstream<wchar_t>;  // C++20

}  // std

*/

#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
#  include <__cxx03/iosfwd>
#else
#  include <__config>
#  include <__fwd/fstream.h>
#  include <__fwd/ios.h>
#  include <__fwd/istream.h>
#  include <__fwd/memory.h>
#  include <__fwd/ostream.h>
#  include <__fwd/sstream.h>
#  include <__fwd/streambuf.h>
#  include <__fwd/string.h>
#  include <__std_mbstate_t.h>
#  include <version>

#  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#    pragma GCC system_header
#  endif

_LIBCPP_BEGIN_NAMESPACE_STD

template <class _CharT, class _Traits = char_traits<_CharT> >
class istreambuf_iterator;
template <class _CharT, class _Traits = char_traits<_CharT> >
class ostreambuf_iterator;

template <class _State>
class fpos;
typedef fpos<mbstate_t> streampos;
#  if _LIBCPP_HAS_WIDE_CHARACTERS
typedef fpos<mbstate_t> wstreampos;
#  endif
#  if _LIBCPP_HAS_CHAR8_T
typedef fpos<mbstate_t> u8streampos;
#  endif
typedef fpos<mbstate_t> u16streampos;
typedef fpos<mbstate_t> u32streampos;

#  if _LIBCPP_STD_VER >= 20 && _LIBCPP_HAS_EXPERIMENTAL_SYNCSTREAM

template <class _CharT, class _Traits = char_traits<_CharT>, class _Allocator = allocator<_CharT>>
class basic_syncbuf;

using syncbuf = basic_syncbuf<char>;
#    if _LIBCPP_HAS_WIDE_CHARACTERS
using wsyncbuf = basic_syncbuf<wchar_t>;
#    endif

template <class _CharT, class _Traits = char_traits<_CharT>, class _Allocator = allocator<_CharT>>
class basic_osyncstream;

using osyncstream = basic_osyncstream<char>;
#    if _LIBCPP_HAS_WIDE_CHARACTERS
using wosyncstream = basic_osyncstream<wchar_t>;
#    endif

#  endif // _LIBCPP_STD_VER >= 20 && _LIBCPP_HAS_EXPERIMENTAL_SYNCSTREAM

template <class _CharT, class _Traits>
class __save_flags {
  typedef basic_ios<_CharT, _Traits> __stream_type;
  typedef typename __stream_type::fmtflags fmtflags;

  __stream_type& __stream_;
  fmtflags __fmtflags_;
  _CharT __fill_;

public:
  __save_flags(const __save_flags&)            = delete;
  __save_flags& operator=(const __save_flags&) = delete;

  _LIBCPP_HIDE_FROM_ABI explicit __save_flags(__stream_type& __stream)
      : __stream_(__stream), __fmtflags_(__stream.flags()), __fill_(__stream.fill()) {}
  _LIBCPP_HIDE_FROM_ABI ~__save_flags() {
    __stream_.flags(__fmtflags_);
    __stream_.fill(__fill_);
  }
};

_LIBCPP_END_NAMESPACE_STD

#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)

#endif // _LIBCPP_IOSFWD