C++ List Library - splice() Function

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Description

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

Declaration

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

C++98

 void splice (iterator position, list& x); 

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(), 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