std::insert_iterator<Container>::operator=

 

C++

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迭代器库

迭代器概念
indirectly_readable (C++20) indirectly_writable (C++20) weakly_incrementable (C++20) incrementable (C++20) is-integer-like is-signed-integer-like (C++20)(C++20)	sentinel_for (C++20) sized_sentinel_for (C++20) input_iterator (C++20) output_iterator (C++20) input_or_output_iterator (C++20)	forward_iterator (C++20) bidirectional_iterator (C++20) random_access_iterator (C++20) contiguous_iterator (C++20)
迭代器原语
input_iterator_tagoutput_iterator_tagforward_iterator_tagbidirectional_iterator_tagrandom_access_iterator_tagcontiguous_iterator_tag (C++20)	iter_value_titer_difference_titer_reference_titer_const_reference_titer_rvalue_reference_titer_common_reference_t (C++20)(C++20)(C++20)(C++23)(C++20)(C++20)	iterator (C++17 弃用) iterator_traits incrementable_traits (C++20) indirectly_readable_traits (C++20)
算法概念与工具
间接可调用概念
indirectly_unary_invocableindirectly_regular_unary_invocable (C++20)(C++20)	indirect_unary_predicate (C++20) indirect_binary_predicate (C++20)	indirect_equivalence_relation (C++20) indirect_strict_weak_order (C++20)
常用算法要求
indirectly_movable (C++20) indirectly_movable_storable (C++20) indirectly_copyable (C++20)	indirectly_copyable_storable (C++20)   indirectly_swappable (C++20) indirectly_comparable (C++20)	permutable (C++20) mergeable (C++20) sortable (C++20)
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indirect_result_t (C++20)	projected (C++20)	projected_value_t (C++26)
迭代器适配器
reverse_iterator make_reverse_iterator (C++14) move_iterator (C++11) make_move_iterator (C++11) default_sentinel_tdefault_sentinel (C++20)(C++20) unreachable_sentinel_tunreachable_sentinel (C++20)(C++20)	front_insert_iterator back_insert_iterator inserter insert_iterator front_inserter back_inserter move_sentinel (C++20)	common_iterator (C++20) counted_iterator (C++20) basic_const_iterator (C++23) const_iterator (C++23) const_sentinel (C++23) make_const_iterator (C++23) make_const_sentinel (C++23)
流迭代器 istream_iterator    ostream_iterator istreambuf_iterator ostreambuf_iterator	迭代器定制点 ranges::iter_move (C++20) ranges::iter_swap (C++20)
迭代器操作 advance distance prev (C++11)   next (C++11) ranges::advance (C++20) ranges::distance (C++20) ranges::prev (C++20) ranges::next (C++20)	范围访问 begincbegin (C++11)(C++14) rbegincrbegin (C++14)(C++14)   endcend (C++11)(C++14) rendcrend (C++14)(C++14)   sizessize (C++17)(C++20) empty (C++17) data (C++17)

 

std::insert_iterator

成员函数

insert_iterator::insert_iterator

insert_iterator::operator=

insert_iterator::operator*

insert_iterator::operator++insert_iterator::operator++(int)

 

	(1)
insert_iterator<Container>& operator=( typename Container::const_reference value );			(C++11 前)
insert_iterator<Container>& operator=( const typename Container::value_type& value );			(C++11 起) (C++20 前)
constexpr insert_iterator<Container>& operator=( const typename Container::value_type& value );			(C++20 起)
	(2)
insert_iterator<Container>& operator=( typename Container::value_type&& value );			(C++11 起) (C++20 前)
constexpr insert_iterator<Container>& operator=( typename Container::value_type&& value );			(C++20 起)

向容器插入给定的 value。

1) 导致 iter = container->insert(iter, value); ++iter;。

2) 导致 iter = container->insert(iter, std::move(value)); ++iter;。

参数

value

-

要插入的值

返回值

*this

注解

此函数开创了关联容器的有提示插入（例如 std::set::insert）和顺序容器的定位插入（例如 std::vector::insert）间的签名兼容性。

示例

运行此代码

#include <deque>
#include <iostream>
#include <iterator>

int main()
{
    std::deque<int> q;
    std::insert_iterator<std::deque<int>> it(q, q.begin());

    for (int i = 0; i < 10; ++i)
        it = i; // 插入 i

    for (auto& elem : q)
        std::cout << elem << ' ';
    std::cout << '\n';
}

输出：

0 1 2 3 4 5 6 7 8 9