Allocate the specified n blocks at the front of the block array. This method invalidates all iterators except d_deque_p->d_start and d_deque_p->d_finish.
n
d_deque_p->d_start
d_deque_p->d_finish
Declared in <bslstl_deque.h>
<bslstl_deque.h>
void insertAtFront(size_type n);