C++ List Library - splice() Function

Description

The C++ function std::list::splice() transfers all elements from list x to *this by using move semantics. The container x becomes empty after the operation.

Declaration

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

C++11

void splice (const_iterator position, list&& x);

Parameters

• position − Position in the list where new elements to be inserted.

• x − Another list object of same type.

Return value

None

Exceptions

This member function never throws exception.

Time complexity

Constant i.e. O(1)

Example

The following example shows the usage of std::list::splice() function.

#include <iostream>
#include <list>

using namespace std;

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

   l1.splice(l1.end(), move(l2));

   cout << "Contents of list l1 after splice operation" << endl;

   for (auto it = l1.begin(); it != l1.end(); ++it)
      cout << *it << endl;

   return 0;
}

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

Contents of list l1 after splice operation
1
2
3
4
5