void assign( size_type count, const T& value );
(1) (since C++11)
template< class InputIt >
void assign( InputIt first, InputIt last );
(2) (since C++11)
void assign( std::initializer_list<T> ilist );
(3) (since C++11)

Replaces the contents of the container.

1) Replaces the contents with count copies of value value
2) Replaces the contents with copies of those in the range [first, last).
This overload has the same effect as overload (1) if InputIt is an integral type. (until C++11)
This overload only participates in overload resolution if InputIt satisfies InputIterator. (since C++11)
3) Replaces the contents with the elements from the initializer list ilist.


[edit] Parameters

count - the new size of the container
value - the value to initialize elements of the container with
first, last - the range to copy the elements from
ilist - initializer list to copy the values from

[edit] Complexity

1) Linear in count
2) Linear in distance between first and last
3) Linear in ilist.size()

[edit] Example

The following code uses assign to add several characters to a std::forward_list<char>:

#include <forward_list>
#include <iostream>
int main()
    std::forward_list<char> characters;
    characters.assign(5, 'a');
    for (char c : characters) {
        std::cout << c << '\n';
    return 0;



[edit] See also

constructs the forward_list
(public member function)