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___ITERATOR_OSTREAMBUF_ITERATOR_H
11 #define _LIBCPP___ITERATOR_OSTREAMBUF_ITERATOR_H
12 
13 #include <__config>
14 #include <__iterator/iterator.h>
15 #include <__iterator/iterator_traits.h>
16 #include <cstddef>
17 #include <iosfwd> // for forward declaration of basic_streambuf
18 
19 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
20 #  pragma GCC system_header
21 #endif
22 
23 _LIBCPP_BEGIN_NAMESPACE_STD
24 
25 _LIBCPP_SUPPRESS_DEPRECATED_PUSH
26 template <class _CharT, class _Traits>
27 class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator
28 #if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES)
29     : public iterator<output_iterator_tag, void, void, void, void>
30 #endif
31 {
32 _LIBCPP_SUPPRESS_DEPRECATED_POP
33 public:
34     typedef output_iterator_tag                 iterator_category;
35     typedef void                                value_type;
36 #if _LIBCPP_STD_VER >= 20
37     typedef ptrdiff_t                           difference_type;
38 #else
39     typedef void                                difference_type;
40 #endif
41     typedef void                                pointer;
42     typedef void                                reference;
43     typedef _CharT                              char_type;
44     typedef _Traits                             traits_type;
45     typedef basic_streambuf<_CharT, _Traits>    streambuf_type;
46     typedef basic_ostream<_CharT, _Traits>      ostream_type;
47 
48 private:
49     streambuf_type* __sbuf_;
50 public:
51     _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator(ostream_type& __s) _NOEXCEPT
52         : __sbuf_(__s.rdbuf()) {}
53     _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT
54         : __sbuf_(__s) {}
55     _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator& operator=(_CharT __c)
56         {
57             if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof()))
58                 __sbuf_ = nullptr;
59             return *this;
60         }
61     _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator& operator*()     {return *this;}
62     _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator& operator++()    {return *this;}
63     _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator& operator++(int) {return *this;}
64     _LIBCPP_HIDE_FROM_ABI bool failed() const _NOEXCEPT {return __sbuf_ == nullptr;}
65 
66     template <class _Ch, class _Tr>
67     friend
68     _LIBCPP_HIDE_FROM_ABI
69     ostreambuf_iterator<_Ch, _Tr>
70     __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s,
71                      const _Ch* __ob, const _Ch* __op, const _Ch* __oe,
72                      ios_base& __iob, _Ch __fl);
73 };
74 
75 _LIBCPP_END_NAMESPACE_STD
76 
77 #endif // _LIBCPP___ITERATOR_OSTREAMBUF_ITERATOR_H
78