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 <__cstddef/ptrdiff_t.h>
15#include <__iterator/iterator.h>
16#include <__iterator/iterator_traits.h>
17#include <__memory/addressof.h>
18#include <__ranges/access.h>
19#include <__utility/move.h>
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
31template <class _Container>
32using __insert_iterator_iter_t _LIBCPP_NODEBUG = ranges::iterator_t<_Container>;
33#else
34template <class _Container>
35using __insert_iterator_iter_t _LIBCPP_NODEBUG = typename _Container::iterator;
36#endif
37
38template <class _Container>
39class insert_iterator
40 : public __iterator_base<insert_iterator<_Container>, output_iterator_tag, void, void, void, void> {
41protected:
42 _Container* container;
43 __insert_iterator_iter_t<_Container> iter;
44
45public:
46 typedef output_iterator_tag iterator_category;
47 typedef void value_type;
48#if _LIBCPP_STD_VER >= 20
49 typedef ptrdiff_t difference_type;
50#else
51 typedef void difference_type;
52#endif
53 typedef void pointer;
54 typedef void reference;
55 typedef _Container container_type;
56
57 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
58 insert_iterator(_Container& __x, __insert_iterator_iter_t<_Container> __i)
59 : container(std::addressof(__x)), iter(__i) {}
60 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 insert_iterator&
61 operator=(const typename _Container::value_type& __value) {
62 iter = container->insert(iter, __value);
63 ++iter;
64 return *this;
65 }
66#ifndef _LIBCPP_CXX03_LANG
67 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 insert_iterator&
68 operator=(typename _Container::value_type&& __value) {
69 iter = container->insert(iter, std::move(__value));
70 ++iter;
71 return *this;
72 }
73#endif // _LIBCPP_CXX03_LANG
74 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 insert_iterator& operator*() { return *this; }
75 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 insert_iterator& operator++() { return *this; }
76 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 insert_iterator& operator++(int) { return *this; }
77};
78
79template <class _Container>
80inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 insert_iterator<_Container>
81inserter(_Container& __x, __insert_iterator_iter_t<_Container> __i) {
82 return insert_iterator<_Container>(__x, __i);
83}
84
85_LIBCPP_END_NAMESPACE_STD
86
87_LIBCPP_POP_MACROS
88
89#endif // _LIBCPP___ITERATOR_INSERT_ITERATOR_H
90