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std::front_insert_iterator<Container>:: operator=

From cppreference.net

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::front_insert_iterator
(1)
front_insert_iterator < Container > &
operator = ( typename Container :: const_reference value ) ;
(bis C++11)
front_insert_iterator < Container > &
operator = ( const typename Container :: value_type & value ) ;
(seit C++11)
(bis C++20)
constexpr front_insert_iterator < Container > &
operator = ( const typename Container :: value_type & value ) ;
(seit C++20)
(2)
front_insert_iterator < Container > &
operator = ( typename Container :: value_type && value ) ;
(seit C++11)
(bis C++20)
constexpr front_insert_iterator < Container > &
operator = ( typename Container :: value_type && value ) ;
(seit C++20)

Fügt den angegebenen Wert value in den Container ein.

1) Führt zu container - > push_front ( value ) .
2) Führt zu container - > push_front ( std :: move ( value ) ) .

Parameter

value - der einzufügende Wert

Rückgabewert

* this

Beispiel

Diesen Code ausführen 
#include <deque>
#include <iostream>
#include <iterator>
int main()
{
    std::deque<int> q;
    std::front_insert_iterator<std::deque<int>> it(q);
    for (int i = 0; i < 10; ++i)
        it = i; // calls q.push_front(i)
    for (auto& elem : q)
        std::cout << elem << ' ';
    std::cout << '\n';
}

Ausgabe: 

9 8 7 6 5 4 3 2 1 0