C++ Forward_list Library - forward_list() Function


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Description

The C++ constructor std::forward_list::forward_list() constructs a new list with n elements and assign val to each element of list.

Declaration

Following is the declaration for std::forward_list::forward_list() constructor form std::forward_list header.

C++11

explicit forward_list (size_type n, const value_type& val,
                       const allocator_type& alloc = allocator_type());

Parameters

  • n − Number of elements to be inserted into container.

  • val − Value to be assigned to each element of the container.

  • alloc − Allocator object.

Return value

Constructor never returns value.

Exceptions

This member function never throws exception.

Time complexity

Linear i.e. O(n)

Example

The following example shows the usage of std::forward_list::forward_list() constructor.

#include <iostream>
#include <forward_list>

using namespace std;

int main(void) {

   forward_list<int> fl(5, 10);

   cout << "List contains following elements" << endl;

   for (auto it = fl.begin(); it != fl.end(); ++it)
      cout << *it << endl;

   return 0;
}

Let us compile and run the above program, this will produce the following result −

List contains following elements
10
10
10
10
10
forward_list.htm
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