C++ List Library - list() Function

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Description

The C++ copy constructor std::list::list() constructs a list with copy of each elements present in existing list.

Declaration

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

C++98

list (const list& other);

C++11

list (const list& other);
list (const list& other, const allocator_type& alloc);

Parameters

• other − Another list object of same type.

• 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::list::list() constructor.

#include <iostream>
#include <list>

using namespace std;

int main(void) {
   list<int> l1 = {1, 2, 3, 4, 5};
   list<int> l2(l1);

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

   for (auto it = l2.begin(); it != l2.end(); ++it)
      cout << *it << endl;

   return 0;
}

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

List contains following element
1
2
3
4
5