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
16namespace std
17{
18
19template<class charT> struct char_traits;
20template<>            struct char_traits<char>;
21template<>            struct char_traits<char8_t>;  // C++20
22template<>            struct char_traits<char16_t>;
23template<>            struct char_traits<char32_t>;
24template<>            struct char_traits<wchar_t>;
25
26template<class T>     class allocator;
27
28class ios_base;
29template <class charT, class traits = char_traits<charT> > class basic_ios;
30
31template <class charT, class traits = char_traits<charT> > class basic_streambuf;
32template <class charT, class traits = char_traits<charT> > class basic_istream;
33template <class charT, class traits = char_traits<charT> > class basic_ostream;
34template <class charT, class traits = char_traits<charT> > class basic_iostream;
35
36template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
37    class basic_stringbuf;
38template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
39    class basic_istringstream;
40template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
41    class basic_ostringstream;
42template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
43    class basic_stringstream;
44
45template <class charT, class traits = char_traits<charT> > class basic_filebuf;
46template <class charT, class traits = char_traits<charT> > class basic_ifstream;
47template <class charT, class traits = char_traits<charT> > class basic_ofstream;
48template <class charT, class traits = char_traits<charT> > class basic_fstream;
49
50template <class charT, class traits = char_traits<charT> > class istreambuf_iterator;
51template <class charT, class traits = char_traits<charT> > class ostreambuf_iterator;
52
53typedef basic_ios<char>              ios;
54typedef basic_ios<wchar_t>           wios;
55
56typedef basic_streambuf<char>        streambuf;
57typedef basic_istream<char>          istream;
58typedef basic_ostream<char>          ostream;
59typedef basic_iostream<char>         iostream;
60
61typedef basic_stringbuf<char>        stringbuf;
62typedef basic_istringstream<char>    istringstream;
63typedef basic_ostringstream<char>    ostringstream;
64typedef basic_stringstream<char>     stringstream;
65
66typedef basic_filebuf<char>          filebuf;
67typedef basic_ifstream<char>         ifstream;
68typedef basic_ofstream<char>         ofstream;
69typedef basic_fstream<char>          fstream;
70
71typedef basic_streambuf<wchar_t>     wstreambuf;
72typedef basic_istream<wchar_t>       wistream;
73typedef basic_ostream<wchar_t>       wostream;
74typedef basic_iostream<wchar_t>      wiostream;
75
76typedef basic_stringbuf<wchar_t>     wstringbuf;
77typedef basic_istringstream<wchar_t> wistringstream;
78typedef basic_ostringstream<wchar_t> wostringstream;
79typedef basic_stringstream<wchar_t>  wstringstream;
80
81typedef basic_filebuf<wchar_t>       wfilebuf;
82typedef basic_ifstream<wchar_t>      wifstream;
83typedef basic_ofstream<wchar_t>      wofstream;
84typedef basic_fstream<wchar_t>       wfstream;
85
86template <class state> class fpos;
87using streampos  = fpos<char_traits<char>::state_type>;
88using wstreampos = fpos<char_traits<wchar_t>::state_type>;
89using u8streampos = fpos<char_traits<char8_t>::state_type>; // C++20
90using u16streampos = fpos<char_traits<char16_t>::state_type>;
91using u32streampos = fpos<char_traits<char32_t>::state_type>;
92
93template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT>>
94    class basic_syncbuf;                          // C++20
95
96using syncbuf = basic_syncbuf<char>;              // C++20
97using wsyncbuf = basic_syncbuf<wchar_t>;          // C++20
98
99template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT>>
100    class basic_osyncstream;                      // C++20
101
102using osyncstream = basic_osyncstream<char>;      // C++20
103using wosyncstream = basic_osyncstream<wchar_t>;  // C++20
104
105}  // std
106
107*/
108
109#include <__config>
110#include <__fwd/fstream.h>
111#include <__fwd/ios.h>
112#include <__fwd/istream.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
126class _LIBCPP_EXPORTED_FROM_ABI ios_base;
127
128template <class _CharT, class _Traits = char_traits<_CharT> >
129class _LIBCPP_TEMPLATE_VIS istreambuf_iterator;
130template <class _CharT, class _Traits = char_traits<_CharT> >
131class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator;
132
133template <class _State>
134class _LIBCPP_TEMPLATE_VIS fpos;
135typedef fpos<mbstate_t> streampos;
136#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
137typedef fpos<mbstate_t> wstreampos;
138#endif
139#ifndef _LIBCPP_HAS_NO_CHAR8_T
140typedef fpos<mbstate_t> u8streampos;
141#endif
142typedef fpos<mbstate_t> u16streampos;
143typedef fpos<mbstate_t> u32streampos;
144
145#if _LIBCPP_STD_VER >= 20 && !defined(_LIBCPP_HAS_NO_EXPERIMENTAL_SYNCSTREAM)
146
147template <class _CharT, class _Traits = char_traits<_CharT>, class _Allocator = allocator<_CharT>>
148class basic_syncbuf;
149
150using syncbuf = basic_syncbuf<char>;
151#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
152using wsyncbuf = basic_syncbuf<wchar_t>;
153#  endif
154
155template <class _CharT, class _Traits = char_traits<_CharT>, class _Allocator = allocator<_CharT>>
156class basic_osyncstream;
157
158using osyncstream = basic_osyncstream<char>;
159#  ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
160using wosyncstream = basic_osyncstream<wchar_t>;
161#  endif
162
163#endif // _LIBCPP_STD_VER >= 20 && !defined(_LIBCPP_HAS_NO_EXPERIMENTAL_SYNCSTREAM)
164
165// Include other forward declarations here
166template <class _Tp, class _Alloc = allocator<_Tp> >
167class _LIBCPP_TEMPLATE_VIS vector;
168
169template <class _CharT, class _Traits>
170class __save_flags {
171  typedef basic_ios<_CharT, _Traits> __stream_type;
172  typedef typename __stream_type::fmtflags fmtflags;
173
174  __stream_type& __stream_;
175  fmtflags __fmtflags_;
176  _CharT __fill_;
177
178  __save_flags(const __save_flags&);
179  __save_flags& operator=(const __save_flags&);
180
181public:
182  _LIBCPP_HIDE_FROM_ABI explicit __save_flags(__stream_type& __stream)
183      : __stream_(__stream), __fmtflags_(__stream.flags()), __fill_(__stream.fill()) {}
184  _LIBCPP_HIDE_FROM_ABI ~__save_flags() {
185    __stream_.flags(__fmtflags_);
186    __stream_.fill(__fill_);
187  }
188};
189
190_LIBCPP_END_NAMESPACE_STD
191
192#endif // _LIBCPP_IOSFWD
193