std::front_inserter
From cppreference.com
Defined in header <iterator>
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template< class Container > std::front_insert_iterator<Container> front_inserter( Container& c ); |
(until C++20) | |
template< class Container > constexpr std::front_insert_iterator<Container> front_inserter( Container& c ); |
(since C++20) | |
front_inserter
is a convenience function template that constructs a std::front_insert_iterator for the container c
with the type deduced from the type of the argument.
Parameters
c | - | container that supports a push_front operation
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Return value
A std::front_insert_iterator which can be used to add elements to the beginning of the container c
Possible implementation
template< class Container > std::front_insert_iterator<Container> front_inserter( Container& c ) { return std::front_insert_iterator<Container>(c); } |
Example
Run this code
#include <vector> #include <deque> #include <iostream> #include <iterator> #include <algorithm> int main() { std::vector<int> v{1,2,3,4,5}; std::deque<int> d; std::copy(v.begin(), v.end(), std::front_inserter(d)); for(int n : d) std::cout << n << ' '; }
Output:
5 4 3 2 1
See also
iterator adaptor for insertion at the front of a container (class template) | |
creates a std::back_insert_iterator of type inferred from the argument (function template) | |
creates a std::insert_iterator of type inferred from the argument (function template) |