libcxx/include/iosfwd

   1 // -*- C++ -*-
   2 //===----------------------------------------------------------------------===//
   3 //
   4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   5 // See https://llvm.org/LICENSE.txt for license information.
   6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #ifndef _LIBCPP_IOSFWD
  11 #define _LIBCPP_IOSFWD
  12
  13 /*
  14     iosfwd synopsis
  15
  16 namespace std
  17 {
  18
  19 template<class charT> struct char_traits;
  20 template<>            struct char_traits<char>;
  21 template<>            struct char_traits<char8_t>;  // C++20
  22 template<>            struct char_traits<char16_t>;
  23 template<>            struct char_traits<char32_t>;
  24 template<>            struct char_traits<wchar_t>;
  25
  26 template<class T>     class allocator;
  27
  28 template <class charT, class traits = char_traits<charT> > class basic_ios;
  29
  30 template <class charT, class traits = char_traits<charT> > class basic_streambuf;
  31 template <class charT, class traits = char_traits<charT> > class basic_istream;
  32 template <class charT, class traits = char_traits<charT> > class basic_ostream;
  33 template <class charT, class traits = char_traits<charT> > class basic_iostream;
  34
  35 template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
  36     class basic_stringbuf;
  37 template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
  38     class basic_istringstream;
  39 template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
  40     class basic_ostringstream;
  41 template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
  42     class basic_stringstream;
  43
  44 template <class charT, class traits = char_traits<charT> > class basic_filebuf;
  45 template <class charT, class traits = char_traits<charT> > class basic_ifstream;
  46 template <class charT, class traits = char_traits<charT> > class basic_ofstream;
  47 template <class charT, class traits = char_traits<charT> > class basic_fstream;
  48
  49 template <class charT, class traits = char_traits<charT> > class istreambuf_iterator;
  50 template <class charT, class traits = char_traits<charT> > class ostreambuf_iterator;
  51
  52 typedef basic_ios<char>              ios;
  53 typedef basic_ios<wchar_t>           wios;
  54
  55 typedef basic_streambuf<char>        streambuf;
  56 typedef basic_istream<char>          istream;
  57 typedef basic_ostream<char>          ostream;
  58 typedef basic_iostream<char>         iostream;
  59
  60 typedef basic_stringbuf<char>        stringbuf;
  61 typedef basic_istringstream<char>    istringstream;
  62 typedef basic_ostringstream<char>    ostringstream;
  63 typedef basic_stringstream<char>     stringstream;
  64
  65 typedef basic_filebuf<char>          filebuf;
  66 typedef basic_ifstream<char>         ifstream;
  67 typedef basic_ofstream<char>         ofstream;
  68 typedef basic_fstream<char>          fstream;
  69
  70 typedef basic_streambuf<wchar_t>     wstreambuf;
  71 typedef basic_istream<wchar_t>       wistream;
  72 typedef basic_ostream<wchar_t>       wostream;
  73 typedef basic_iostream<wchar_t>      wiostream;
  74
  75 typedef basic_stringbuf<wchar_t>     wstringbuf;
  76 typedef basic_istringstream<wchar_t> wistringstream;
  77 typedef basic_ostringstream<wchar_t> wostringstream;
  78 typedef basic_stringstream<wchar_t>  wstringstream;
  79
  80 typedef basic_filebuf<wchar_t>       wfilebuf;
  81 typedef basic_ifstream<wchar_t>      wifstream;
  82 typedef basic_ofstream<wchar_t>      wofstream;
  83 typedef basic_fstream<wchar_t>       wfstream;
  84
  85 template <class state> class fpos;
  86 using streampos  = fpos<char_traits<char>::state_type>;
  87 using wstreampos = fpos<char_traits<wchar_t>::state_type>;
  88 using u8streampos = fpos<char_traits<char8_t>::state_type>; // C++20
  89 using u16streampos = fpos<char_traits<char16_t>::state_type>;
  90 using u32streampos = fpos<char_traits<char32_t>::state_type>;
  91
  92 template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT>>
  93     class basic_syncbuf;                          // C++20
  94
  95 using syncbuf = basic_syncbuf<char>;              // C++20
  96 using wsyncbuf = basic_syncbuf<wchar_t>;          // C++20
  97
  98 template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT>>
  99     class basic_osyncstream;                      // C++20
 100
 101 using osyncstream = basic_osyncstream<char>;      // C++20
 102 using wosyncstream = basic_osyncstream<wchar_t>;  // C++20
 103
 104 }  // std
 105
 106 */
 107
 108 #include <__config>
 109 #include <__fwd/fstream.h>
 110 #include <__fwd/ios.h>
 111 #include <__fwd/istream.h>
 112 #include <__fwd/memory.h>
 113 #include <__fwd/ostream.h>
 114 #include <__fwd/sstream.h>
 115 #include <__fwd/streambuf.h>
 116 #include <__fwd/string.h>
 117 #include <__std_mbstate_t.h>
 118 #include <version>
 119
 120 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 121 #  pragma GCC system_header
 122 #endif
 123
 124 _LIBCPP_BEGIN_NAMESPACE_STD
 125
 126 template <class _CharT, class _Traits = char_traits<_CharT> >
 127 class _LIBCPP_TEMPLATE_VIS istreambuf_iterator;
 128 template <class _CharT, class _Traits = char_traits<_CharT> >
 129 class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator;
 130
 131 template <class _State>
 132 class _LIBCPP_TEMPLATE_VIS fpos;
 133 typedef fpos<mbstate_t> streampos;
 134 #if _LIBCPP_HAS_WIDE_CHARACTERS
 135 typedef fpos<mbstate_t> wstreampos;
 136 #endif
 137 #if _LIBCPP_HAS_CHAR8_T
 138 typedef fpos<mbstate_t> u8streampos;
 139 #endif
 140 typedef fpos<mbstate_t> u16streampos;
 141 typedef fpos<mbstate_t> u32streampos;
 142
 143 #if _LIBCPP_STD_VER >= 20 && !defined(_LIBCPP_HAS_NO_EXPERIMENTAL_SYNCSTREAM)
 144
 145 template <class _CharT, class _Traits = char_traits<_CharT>, class _Allocator = allocator<_CharT>>
 146 class basic_syncbuf;
 147
 148 using syncbuf = basic_syncbuf<char>;
 149 #  if _LIBCPP_HAS_WIDE_CHARACTERS
 150 using wsyncbuf = basic_syncbuf<wchar_t>;
 151 #  endif
 152
 153 template <class _CharT, class _Traits = char_traits<_CharT>, class _Allocator = allocator<_CharT>>
 154 class basic_osyncstream;
 155
 156 using osyncstream = basic_osyncstream<char>;
 157 #  if _LIBCPP_HAS_WIDE_CHARACTERS
 158 using wosyncstream = basic_osyncstream<wchar_t>;
 159 #  endif
 160
 161 #endif // _LIBCPP_STD_VER >= 20 && !defined(_LIBCPP_HAS_NO_EXPERIMENTAL_SYNCSTREAM)
 162
 163 template <class _CharT, class _Traits>
 164 class __save_flags {
 165   typedef basic_ios<_CharT, _Traits> __stream_type;
 166   typedef typename __stream_type::fmtflags fmtflags;
 167
 168   __stream_type& __stream_;
 169   fmtflags __fmtflags_;
 170   _CharT __fill_;
 171
 172 public:
 173   __save_flags(const __save_flags&)            = delete;
 174   __save_flags& operator=(const __save_flags&) = delete;
 175
 176   _LIBCPP_HIDE_FROM_ABI explicit __save_flags(__stream_type& __stream)
 177       : __stream_(__stream), __fmtflags_(__stream.flags()), __fill_(__stream.fill()) {}
 178   _LIBCPP_HIDE_FROM_ABI ~__save_flags() {
 179     __stream_.flags(__fmtflags_);
 180     __stream_.fill(__fill_);
 181   }
 182 };
 183
 184 _LIBCPP_END_NAMESPACE_STD
 185
 186 #endif // _LIBCPP_IOSFWD