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 
34 public:
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 
49 private:
50   streambuf_type* __sbuf_;
51 
52 public:
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