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std::forward_list::resize

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< cpp‎ | container‎ | forward list
Revision as of 19:54, 2 November 2012 by P12bot (Talk | contribs)

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 as if by repeatedly calling pop_back().

If the current size is less than count,

1) additional value-initialized elements are appended
2) additional copies of value are appended

Contents

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).

Return value

(none)

Complexity

Linear in the size of the container

Example

#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

See also

inserts elements
(public member function) [edit]
erases elements
(public member function) [edit]