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std::back_inserter(3) | C++ Standard Libary | std::back_inserter(3) |
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 >
constexpr std::back_insert_iterator<Container> back_inserter( (since
C++20)
Container& c );
back_inserter is a convenient 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¶
back_insert_iterator iterator adaptor for insertion at the end of
a container
(class template)
creates a std::front_insert_iterator of type inferred from the
front_inserter argument
(function template)
creates a std::insert_iterator of type inferred from the
inserter argument
(function template)
2022.07.31 | http://cppreference.com |