xref: /llvm-project/libcxx/include/iosfwd (revision 24e70e3930724ce499ad05d669bfbc4423c542e0) 
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
28template <class charT, class traits = char_traits<charT> > class basic_ios;
29
30template <class charT, class traits = char_traits<charT> > class basic_streambuf;
31template <class charT, class traits = char_traits<charT> > class basic_istream;
32template <class charT, class traits = char_traits<charT> > class basic_ostream;
33template <class charT, class traits = char_traits<charT> > class basic_iostream;
34
35template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
36    class basic_stringbuf;
37template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
38    class basic_istringstream;
39template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
40    class basic_ostringstream;
41template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
42    class basic_stringstream;
43
44template <class charT, class traits = char_traits<charT> > class basic_filebuf;
45template <class charT, class traits = char_traits<charT> > class basic_ifstream;
46template <class charT, class traits = char_traits<charT> > class basic_ofstream;
47template <class charT, class traits = char_traits<charT> > class basic_fstream;
48
49template <class charT, class traits = char_traits<charT> > class istreambuf_iterator;
50template <class charT, class traits = char_traits<charT> > class ostreambuf_iterator;
51
52typedef basic_ios<char>              ios;
53typedef basic_ios<wchar_t>           wios;
54
55typedef basic_streambuf<char>        streambuf;
56typedef basic_istream<char>          istream;
57typedef basic_ostream<char>          ostream;
58typedef basic_iostream<char>         iostream;
59
60typedef basic_stringbuf<char>        stringbuf;
61typedef basic_istringstream<char>    istringstream;
62typedef basic_ostringstream<char>    ostringstream;
63typedef basic_stringstream<char>     stringstream;
64
65typedef basic_filebuf<char>          filebuf;
66typedef basic_ifstream<char>         ifstream;
67typedef basic_ofstream<char>         ofstream;
68typedef basic_fstream<char>          fstream;
69
70typedef basic_streambuf<wchar_t>     wstreambuf;
71typedef basic_istream<wchar_t>       wistream;
72typedef basic_ostream<wchar_t>       wostream;
73typedef basic_iostream<wchar_t>      wiostream;
74
75typedef basic_stringbuf<wchar_t>     wstringbuf;
76typedef basic_istringstream<wchar_t> wistringstream;
77typedef basic_ostringstream<wchar_t> wostringstream;
78typedef basic_stringstream<wchar_t>  wstringstream;
79
80typedef basic_filebuf<wchar_t>       wfilebuf;
81typedef basic_ifstream<wchar_t>      wifstream;
82typedef basic_ofstream<wchar_t>      wofstream;
83typedef basic_fstream<wchar_t>       wfstream;
84
85template <class state> class fpos;
86using streampos  = fpos<char_traits<char>::state_type>;
87using wstreampos = fpos<char_traits<wchar_t>::state_type>;
88using u8streampos = fpos<char_traits<char8_t>::state_type>; // C++20
89using u16streampos = fpos<char_traits<char16_t>::state_type>;
90using u32streampos = fpos<char_traits<char32_t>::state_type>;
91
92template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT>>
93    class basic_syncbuf;                          // C++20
94
95using syncbuf = basic_syncbuf<char>;              // C++20
96using wsyncbuf = basic_syncbuf<wchar_t>;          // C++20
97
98template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT>>
99    class basic_osyncstream;                      // C++20
100
101using osyncstream = basic_osyncstream<char>;      // C++20
102using wosyncstream = basic_osyncstream<wchar_t>;  // C++20
103
104}  // std
105
106*/
107
108#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
109#  include <__cxx03/iosfwd>
110#else
111#  include <__config>
112#  include <__fwd/fstream.h>
113#  include <__fwd/ios.h>
114#  include <__fwd/istream.h>
115#  include <__fwd/memory.h>
116#  include <__fwd/ostream.h>
117#  include <__fwd/sstream.h>
118#  include <__fwd/streambuf.h>
119#  include <__fwd/string.h>
120#  include <__std_mbstate_t.h>
121#  include <version>
122
123#  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
124#    pragma GCC system_header
125#  endif
126
127_LIBCPP_BEGIN_NAMESPACE_STD
128
129template <class _CharT, class _Traits = char_traits<_CharT> >
130class _LIBCPP_TEMPLATE_VIS istreambuf_iterator;
131template <class _CharT, class _Traits = char_traits<_CharT> >
132class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator;
133
134template <class _State>
135class _LIBCPP_TEMPLATE_VIS fpos;
136typedef fpos<mbstate_t> streampos;
137#  if _LIBCPP_HAS_WIDE_CHARACTERS
138typedef fpos<mbstate_t> wstreampos;
139#  endif
140#  if _LIBCPP_HAS_CHAR8_T
141typedef fpos<mbstate_t> u8streampos;
142#  endif
143typedef fpos<mbstate_t> u16streampos;
144typedef fpos<mbstate_t> u32streampos;
145
146#  if _LIBCPP_STD_VER >= 20 && _LIBCPP_HAS_EXPERIMENTAL_SYNCSTREAM
147
148template <class _CharT, class _Traits = char_traits<_CharT>, class _Allocator = allocator<_CharT>>
149class basic_syncbuf;
150
151using syncbuf = basic_syncbuf<char>;
152#    if _LIBCPP_HAS_WIDE_CHARACTERS
153using wsyncbuf = basic_syncbuf<wchar_t>;
154#    endif
155
156template <class _CharT, class _Traits = char_traits<_CharT>, class _Allocator = allocator<_CharT>>
157class basic_osyncstream;
158
159using osyncstream = basic_osyncstream<char>;
160#    if _LIBCPP_HAS_WIDE_CHARACTERS
161using wosyncstream = basic_osyncstream<wchar_t>;
162#    endif
163
164#  endif // _LIBCPP_STD_VER >= 20 && _LIBCPP_HAS_EXPERIMENTAL_SYNCSTREAM
165
166template <class _CharT, class _Traits>
167class __save_flags {
168  typedef basic_ios<_CharT, _Traits> __stream_type;
169  typedef typename __stream_type::fmtflags fmtflags;
170
171  __stream_type& __stream_;
172  fmtflags __fmtflags_;
173  _CharT __fill_;
174
175public:
176  __save_flags(const __save_flags&)            = delete;
177  __save_flags& operator=(const __save_flags&) = delete;
178
179  _LIBCPP_HIDE_FROM_ABI explicit __save_flags(__stream_type& __stream)
180      : __stream_(__stream), __fmtflags_(__stream.flags()), __fill_(__stream.fill()) {}
181  _LIBCPP_HIDE_FROM_ABI ~__save_flags() {
182    __stream_.flags(__fmtflags_);
183    __stream_.fill(__fill_);
184  }
185};
186
187_LIBCPP_END_NAMESPACE_STD
188
189#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
190
191#endif // _LIBCPP_IOSFWD
192