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
26template <class _CharT, class _Traits>
27class _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
34public:
35  typedef output_iterator_tag iterator_category;
36  typedef void value_type;
37#if _LIBCPP_STD_VER >= 20
38  typedef ptrdiff_t difference_type;
39#else
40  typedef void difference_type;
41#endif
42  typedef void pointer;
43  typedef void reference;
44  typedef _CharT char_type;
45  typedef _Traits traits_type;
46  typedef basic_streambuf<_CharT, _Traits> streambuf_type;
47  typedef basic_ostream<_CharT, _Traits> ostream_type;
48
49private:
50  streambuf_type* __sbuf_;
51
52public:
53  _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator(ostream_type& __s) _NOEXCEPT : __sbuf_(__s.rdbuf()) {}
54  _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT : __sbuf_(__s) {}
55  _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator& operator=(_CharT __c) {
56    if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof()))
57      __sbuf_ = nullptr;
58    return *this;
59  }
60  _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator& operator*() { return *this; }
61  _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator& operator++() { return *this; }
62  _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator& operator++(int) { return *this; }
63  _LIBCPP_HIDE_FROM_ABI bool failed() const _NOEXCEPT { return __sbuf_ == nullptr; }
64
65  template <class _Ch, class _Tr>
66  friend _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator<_Ch, _Tr> __pad_and_output(
67      ostreambuf_iterator<_Ch, _Tr> __s, const _Ch* __ob, const _Ch* __op, const _Ch* __oe, ios_base& __iob, _Ch __fl);
68};
69
70_LIBCPP_END_NAMESPACE_STD
71
72#endif // _LIBCPP___ITERATOR_OSTREAMBUF_ITERATOR_H
73