C++ Forward_list Library - splice_after() Function

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Description

The C++ function std::forward_list::splice_after() transfers the element pointed to by iterator i from forward_list x into *this by using move semantics. The element is inserted after the element pointed to by position.

Declaration

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

C++11

void splice_after (const_iterator position, forward_list&& x, const_iterator i);

Parameters

• position − Position in the forward_list after which new elements to be inserted.

• x − Another forward_list object of same type.

• i − Random access iterator.

Return value

None

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::splice_after() function.

#include <iostream>
#include <forward_list>

using namespace std;

int main(void) {

   forward_list<int> fl1 = {1, 2};
   forward_list<int> fl2 = {1, 3, 4, 5};

   fl2.splice_after(fl2.begin(), move(fl1), fl1.begin());

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

   for (auto it = fl2.begin(); it != fl2.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
1
2
3
4
5