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
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
115class _LIBCPP_EXPORTED_FROM_ABI ios_base;
116
117template <class _CharT, class _Traits = char_traits<_CharT> >
118    class _LIBCPP_TEMPLATE_VIS istreambuf_iterator;
119template <class _CharT, class _Traits = char_traits<_CharT> >
120    class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator;
121
122template <class _State>             class _LIBCPP_TEMPLATE_VIS fpos;
123typedef fpos<mbstate_t>    streampos;
124typedef fpos<mbstate_t>    wstreampos;
125#ifndef _LIBCPP_HAS_NO_CHAR8_T
126typedef fpos<mbstate_t>    u8streampos;
127#endif
128typedef fpos<mbstate_t>    u16streampos;
129typedef fpos<mbstate_t>    u32streampos;
130
131// Include other forward declarations here
132template <class _Tp, class _Alloc = allocator<_Tp> >
133class _LIBCPP_TEMPLATE_VIS vector;
134
135template <class _CharT, class _Traits>
136class __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&);
147public:
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
165