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std::back_insert_iterator<Container>:: operator=

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C++
Iterator library
Iterator concepts
Iterator primitives
Algorithm concepts and utilities
Indirect callable concepts
Common algorithm requirements
(C++20)
(C++20)
(C++20)
Utilities
(C++20)
Iterator adaptors
Range access
(C++11) (C++14)
(C++14) (C++14)
(C++11) (C++14)
(C++14) (C++14)
(C++17) (C++20)
(C++17)
(C++17)
std::back_insert_iterator
(1)
back_insert_iterator < Container > &
operator = ( typename Container :: const_reference value ) ;
(C++11 前)
back_insert_iterator < Container > &
operator = ( const typename Container :: value_type & value ) ;
(C++11 起)
(C++20 前)
constexpr back_insert_iterator < Container > &
operator = ( const typename Container :: value_type & value ) ;
(C++20 起)
(2)
back_insert_iterator < Container > &
operator = ( typename Container :: value_type && value ) ;
(C++11 起)
(C++20 前)
constexpr back_insert_iterator < Container > &
operator = ( typename Container :: value_type && value ) ;
(C++20 起)

将给定的值 value 插入到容器中。

1) 结果为 container - > push_back ( value ) 。
2) 结果导致 container - > push_back ( std :: move ( value ) ) 。

参数

value - 要插入的值

返回值

* this

示例

运行此代码 
#include <deque>
#include <iostream>
#include <iterator>
int main()
{
    std::deque<int> q;
    std::back_insert_iterator<std::deque<int>> it(q);
    for (int i = 0; i < 10; ++i)
        it = i; // 调用 q.push_back(i)
    for (auto& elem : q)
        std::cout << elem << ' ';
    std::cout << '\n';
}

输出： 

0 1 2 3 4 5 6 7 8 9