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_BEGIN_NAMESPACE_STD
26
27 #if _LIBCPP_STD_VER > 17
28 template <class _Container>
29 using __insert_iterator_iter_t = ranges::iterator_t<_Container>;
30 #else
31 template <class _Container>
32 using __insert_iterator_iter_t = typename _Container::iterator;
33 #endif
34
35 _LIBCPP_SUPPRESS_DEPRECATED_PUSH
36 template <class _Container>
37 class _LIBCPP_TEMPLATE_VIS insert_iterator
38 #if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES)
39 : public iterator<output_iterator_tag, void, void, void, void>
40 #endif
41 {
42 _LIBCPP_SUPPRESS_DEPRECATED_POP
43 protected:
44 _Container* container;
45 __insert_iterator_iter_t<_Container> iter;
46 public:
47 typedef output_iterator_tag iterator_category;
48 typedef void value_type;
49 #if _LIBCPP_STD_VER > 17
50 typedef ptrdiff_t difference_type;
51 #else
52 typedef void difference_type;
53 #endif
54 typedef void pointer;
55 typedef void reference;
56 typedef _Container container_type;
57
insert_iterator(_Container & __x,__insert_iterator_iter_t<_Container> __i)58 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 insert_iterator(_Container& __x, __insert_iterator_iter_t<_Container> __i)
59 : container(_VSTD::addressof(__x)), iter(__i) {}
60 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 insert_iterator& operator=(const typename _Container::value_type& __value)
61 {iter = container->insert(iter, __value); ++iter; return *this;}
62 #ifndef _LIBCPP_CXX03_LANG
63 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 insert_iterator& operator=(typename _Container::value_type&& __value)
64 {iter = container->insert(iter, _VSTD::move(__value)); ++iter; return *this;}
65 #endif // _LIBCPP_CXX03_LANG
66 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 insert_iterator& operator*() {return *this;}
67 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 insert_iterator& operator++() {return *this;}
68 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 insert_iterator& operator++(int) {return *this;}
69 };
70
71 template <class _Container>
72 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
73 insert_iterator<_Container>
inserter(_Container & __x,__insert_iterator_iter_t<_Container> __i)74 inserter(_Container& __x, __insert_iterator_iter_t<_Container> __i)
75 {
76 return insert_iterator<_Container>(__x, __i);
77 }
78
79 _LIBCPP_END_NAMESPACE_STD
80
81 #endif // _LIBCPP___ITERATOR_INSERT_ITERATOR_H
82