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_BACK_INSERT_ITERATOR_H
11 #define _LIBCPP___ITERATOR_BACK_INSERT_ITERATOR_H
12 
13 #include <__config>
14 #include <__iterator/iterator.h>
15 #include <__iterator/iterator_traits.h>
16 #include <__memory/addressof.h>
17 #include <__utility/move.h>
18 #include <cstddef>
19 
20 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
21 #  pragma GCC system_header
22 #  pragma clang include_instead(<iterator>)
23 #endif
24 
25 _LIBCPP_BEGIN_NAMESPACE_STD
26 
27 _LIBCPP_SUPPRESS_DEPRECATED_PUSH
28 template <class _Container>
29 class _LIBCPP_TEMPLATE_VIS back_insert_iterator
30 #if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES)
31     : public iterator<output_iterator_tag, void, void, void, void>
32 #endif
33 {
34 _LIBCPP_SUPPRESS_DEPRECATED_POP
35 protected:
36     _Container* container;
37 public:
38     typedef output_iterator_tag iterator_category;
39     typedef void value_type;
40 #if _LIBCPP_STD_VER > 17
41     typedef ptrdiff_t difference_type;
42 #else
43     typedef void difference_type;
44 #endif
45     typedef void pointer;
46     typedef void reference;
47     typedef _Container container_type;
48 
49     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 explicit back_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {}
50     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator=(const typename _Container::value_type& __value_)
51         {container->push_back(__value_); return *this;}
52 #ifndef _LIBCPP_CXX03_LANG
53     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator=(typename _Container::value_type&& __value_)
54         {container->push_back(_VSTD::move(__value_)); return *this;}
55 #endif // _LIBCPP_CXX03_LANG
56     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator*()     {return *this;}
57     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator++()    {return *this;}
58     _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator  operator++(int) {return *this;}
59 };
60 
61 template <class _Container>
62 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17
63 back_insert_iterator<_Container>
64 back_inserter(_Container& __x)
65 {
66     return back_insert_iterator<_Container>(__x);
67 }
68 
69 _LIBCPP_END_NAMESPACE_STD
70 
71 #endif // _LIBCPP___ITERATOR_BACK_INSERT_ITERATOR_H
72