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 !defined(_LIBCPP_HAS_NO_CONCEPTS) && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
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 
58     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator(_Container& __x, __insert_iterator_iter_t<_Container> __i)
59         : container(_VSTD::addressof(__x)), iter(__i) {}
60     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 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_AFTER_CXX17 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_AFTER_CXX17 insert_iterator& operator*()        {return *this;}
67     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator++()       {return *this;}
68     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator++(int)    {return *this;}
69 };
70 
71 template <class _Container>
72 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
73 insert_iterator<_Container>
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