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 class ios_base;
  29 template <class charT, class traits = char_traits<charT> > class basic_ios;
  30
  31 template <class charT, class traits = char_traits<charT> > class basic_streambuf;
  32 template <class charT, class traits = char_traits<charT> > class basic_istream;
  33 template <class charT, class traits = char_traits<charT> > class basic_ostream;
  34 template <class charT, class traits = char_traits<charT> > class basic_iostream;
  35
  36 template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
  37     class basic_stringbuf;
  38 template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
  39     class basic_istringstream;
  40 template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
  41     class basic_ostringstream;
  42 template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
  43     class basic_stringstream;
  44
  45 template <class charT, class traits = char_traits<charT> > class basic_filebuf;
  46 template <class charT, class traits = char_traits<charT> > class basic_ifstream;
  47 template <class charT, class traits = char_traits<charT> > class basic_ofstream;
  48 template <class charT, class traits = char_traits<charT> > class basic_fstream;
  49
  50 template <class charT, class traits = char_traits<charT> > class istreambuf_iterator;
  51 template <class charT, class traits = char_traits<charT> > class ostreambuf_iterator;
  52
  53 typedef basic_ios<char>              ios;
  54 typedef basic_ios<wchar_t>           wios;
  55
  56 typedef basic_streambuf<char>        streambuf;
  57 typedef basic_istream<char>          istream;
  58 typedef basic_ostream<char>          ostream;
  59 typedef basic_iostream<char>         iostream;
  60
  61 typedef basic_stringbuf<char>        stringbuf;
  62 typedef basic_istringstream<char>    istringstream;
  63 typedef basic_ostringstream<char>    ostringstream;
  64 typedef basic_stringstream<char>     stringstream;
  65
  66 typedef basic_filebuf<char>          filebuf;
  67 typedef basic_ifstream<char>         ifstream;
  68 typedef basic_ofstream<char>         ofstream;
  69 typedef basic_fstream<char>          fstream;
  70
  71 typedef basic_streambuf<wchar_t>     wstreambuf;
  72 typedef basic_istream<wchar_t>       wistream;
  73 typedef basic_ostream<wchar_t>       wostream;
  74 typedef basic_iostream<wchar_t>      wiostream;
  75
  76 typedef basic_stringbuf<wchar_t>     wstringbuf;
  77 typedef basic_istringstream<wchar_t> wistringstream;
  78 typedef basic_ostringstream<wchar_t> wostringstream;
  79 typedef basic_stringstream<wchar_t>  wstringstream;
  80
  81 typedef basic_filebuf<wchar_t>       wfilebuf;
  82 typedef basic_ifstream<wchar_t>      wifstream;
  83 typedef basic_ofstream<wchar_t>      wofstream;
  84 typedef basic_fstream<wchar_t>       wfstream;
  85
  86 template <class state> class fpos;
  87 using streampos  = fpos<char_traits<char>::state_type>;
  88 using wstreampos = fpos<char_traits<wchar_t>::state_type>;
  89 using u8streampos = fpos<char_traits<char8_t>::state_type>; // C++20
  90 using u16streampos = fpos<char_traits<char16_t>::state_type>;
  91 using u32streampos = fpos<char_traits<char32_t>::state_type>;
  92
  93 }  // std
  94
  95 */
  96
  97 #include <__assert> // all public C++ headers provide the assertion handler
  98 #include <__config>
  99 #include <__fwd/fstream.h>
 100 #include <__fwd/ios.h>
 101 #include <__fwd/istream.h>
 102 #include <__fwd/ostream.h>
 103 #include <__fwd/sstream.h>
 104 #include <__fwd/streambuf.h>
 105 #include <__fwd/string.h>
 106 #include <__std_mbstate_t.h>
 107 #include <version>
 108
 109 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 110 #  pragma GCC system_header
 111 #endif
 112
 113 _LIBCPP_BEGIN_NAMESPACE_STD
 114
 115 class _LIBCPP_EXPORTED_FROM_ABI ios_base;
 116
 117 template <class _CharT, class _Traits = char_traits<_CharT> >
 118     class _LIBCPP_TEMPLATE_VIS istreambuf_iterator;
 119 template <class _CharT, class _Traits = char_traits<_CharT> >
 120     class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator;
 121
 122 template <class _State>             class _LIBCPP_TEMPLATE_VIS fpos;
 123 typedef fpos<mbstate_t>    streampos;
 124 typedef fpos<mbstate_t>    wstreampos;
 125 #ifndef _LIBCPP_HAS_NO_CHAR8_T
 126 typedef fpos<mbstate_t>    u8streampos;
 127 #endif
 128 typedef fpos<mbstate_t>    u16streampos;
 129 typedef fpos<mbstate_t>    u32streampos;
 130
 131 // Include other forward declarations here
 132 template <class _Tp, class _Alloc = allocator<_Tp> >
 133 class _LIBCPP_TEMPLATE_VIS vector;
 134
 135 template <class _CharT, class _Traits>
 136 class __save_flags
 137 {
 138     typedef basic_ios<_CharT, _Traits> __stream_type;
 139     typedef typename __stream_type::fmtflags fmtflags;
 140
 141     __stream_type& __stream_;
 142     fmtflags       __fmtflags_;
 143     _CharT         __fill_;
 144
 145     __save_flags(const __save_flags&);
 146     __save_flags& operator=(const __save_flags&);
 147 public:
 148     _LIBCPP_INLINE_VISIBILITY
 149     explicit __save_flags(__stream_type& __stream)
 150         : __stream_(__stream),
 151           __fmtflags_(__stream.flags()),
 152           __fill_(__stream.fill())
 153         {}
 154     _LIBCPP_INLINE_VISIBILITY
 155     ~__save_flags()
 156     {
 157         __stream_.flags(__fmtflags_);
 158         __stream_.fill(__fill_);
 159     }
 160 };
 161
 162 _LIBCPP_END_NAMESPACE_STD
 163
 164 #endif // _LIBCPP_IOSFWD