How do I clear the std::queue efficiently?

Question

I am using std::queue for implementing JobQueue class. ( Basically this class process each job in FIFO manner). In one scenario, I want to clear the queue in one shot( delet

Answer 1

A common idiom for clearing standard containers is swapping with an empty version of the container:

void clear( std::queue &q )
{
   std::queue empty;
   std::swap( q, empty );
}

It is also the only way of actually clearing the memory held inside some containers (std::vector)