std::back_inserter (3) - Linux Man Pages

std::back_inserter: std::back_inserter

NAME

std::back_inserter - std::back_inserter

Synopsis


Defined in header <iterator>
template< class Container > (until C++20)
std::back_insert_iterator<Container> back_inserter( Container& c );
template< class Container > (since C++20)
constexpr std::back_insert_iterator<Container> back_inserter( Container& c );


back_inserter is a convenience function template that constructs a std::back_insert_iterator for the container c with the type deduced from the type of the argument.

Parameters


c - container that supports a push_back operation

Return value


A std::back_insert_iterator which can be used to add elements to the end of the container c

Possible implementation


  template< class Container >
  std::back_insert_iterator<Container> back_inserter( Container& c )
  {
      return std::back_insert_iterator<Container>(c);
  }

Example


// Run this code


  #include <iostream>
  #include <vector>
  #include <algorithm>
  #include <iterator>


  int main()
  {
      std::vector<int> v{1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
      std::fill_n(std::back_inserter(v), 3, -1);
      for (int n : v)
          std::cout << n << ' ';
  }

Output:


  1 2 3 4 5 6 7 8 9 10 -1 -1 -1

See also


                     iterator adaptor for insertion at the end of a container
back_insert_iterator (class template)
                     creates a std::front_insert_iterator of type inferred from the argument
front_inserter (function template)
                     creates a std::insert_iterator of type inferred from the argument
inserter (function template)