std::forward_list::resize - cppreference.com

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# std::forward_list::resize

From cppreference.com
< cpp‎ | container‎ | forward list

[edit template]

void resize( size_type count ); | (1) |
void resize( size_type count, const value_type& value ); | (2) |

Resizes the container to contain `count` elements.

If the current size is greater than `count`, the container is reduced to its first `count` elements.

If the current size is less than `count`,

1) additional default-inserted elements are appended
2) additional copies of `value` are appended

### [edit] Parameters

count | - | new size of the container
value | - | the value to initialize the new elements with
Type requirements
- `T` must meet the requirements of `DefaultInsertable` in order to use overload (1).
- `T` must meet the requirements of `CopyInsertable` in order to use overload (2).

### [edit] Return value

(none)

### [edit] Complexity

Linear in the difference between the current size and `count`.

### [edit] Example

Run this code

    #include <iostream>
    #include <forward_list>
    int main()
    {
        std::forward_list<int> c = {1, 2, 3};
        std::cout << "The forward_list holds: ";
        for(auto& el: c) std::cout << el << ' ';
        std::cout << '\n';
        c.resize(5);
        std::cout << "After resize up 5: ";
        for(auto& el: c) std::cout << el << ' ';
        std::cout << '\n';
        c.resize(2);
        std::cout << "After resize down to 2: ";
        for(auto& el: c) std::cout << el << ' ';
        std::cout << '\n';
    }

Output:

    The forward_list holds: 1 2 3
    After resize up 5: 1 2 3 0 0
    After resize down to 2: 1 2

### [edit] See also

insert_after | inserts elements after an element (public member function) [edit]
erase_after | erases an element after an element (public member function) [edit]

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