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_INSERT_ITERATOR_H
11 #define _LIBCPP___ITERATOR_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 <__ranges/access.h>
18 #include <__utility/move.h>
19 #include <cstddef>
20
21 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
22 # pragma GCC system_header
23 #endif
24
25 _LIBCPP_PUSH_MACROS
26 #include <__undef_macros>
27
28 _LIBCPP_BEGIN_NAMESPACE_STD
29
30 #if _LIBCPP_STD_VER >= 20
31 template <class _Container>
32 using __insert_iterator_iter_t = ranges::iterator_t<_Container>;
33 #else
34 template <class _Container>
35 using __insert_iterator_iter_t = typename _Container::iterator;
36 #endif
37
38 _LIBCPP_SUPPRESS_DEPRECATED_PUSH
39 template <class _Container>
40 class _LIBCPP_TEMPLATE_VIS insert_iterator
41 #if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES)
42 : public iterator<output_iterator_tag, void, void, void, void>
43 #endif
44 {
45 _LIBCPP_SUPPRESS_DEPRECATED_POP
46
47 protected:
48 _Container* container;
49 __insert_iterator_iter_t<_Container> iter;
50
51 public:
52 typedef output_iterator_tag iterator_category;
53 typedef void value_type;
54 #if _LIBCPP_STD_VER >= 20
55 typedef ptrdiff_t difference_type;
56 #else
57 typedef void difference_type;
58 #endif
59 typedef void pointer;
60 typedef void reference;
61 typedef _Container container_type;
62
63 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
insert_iterator(_Container & __x,__insert_iterator_iter_t<_Container> __i)64 insert_iterator(_Container& __x, __insert_iterator_iter_t<_Container> __i)
65 : container(std::addressof(__x)), iter(__i) {}
66 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 insert_iterator&
67 operator=(const typename _Container::value_type& __value) {
68 iter = container->insert(iter, __value);
69 ++iter;
70 return *this;
71 }
72 #ifndef _LIBCPP_CXX03_LANG
73 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 insert_iterator&
74 operator=(typename _Container::value_type&& __value) {
75 iter = container->insert(iter, std::move(__value));
76 ++iter;
77 return *this;
78 }
79 #endif // _LIBCPP_CXX03_LANG
80 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 insert_iterator& operator*() { return *this; }
81 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 insert_iterator& operator++() { return *this; }
82 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 insert_iterator& operator++(int) { return *this; }
83 };
84
85 template <class _Container>
86 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 insert_iterator<_Container>
inserter(_Container & __x,__insert_iterator_iter_t<_Container> __i)87 inserter(_Container& __x, __insert_iterator_iter_t<_Container> __i) {
88 return insert_iterator<_Container>(__x, __i);
89 }
90
91 _LIBCPP_END_NAMESPACE_STD
92
93 _LIBCPP_POP_MACROS
94
95 #endif // _LIBCPP___ITERATOR_INSERT_ITERATOR_H
96