If elem1 and elem2 are equal, then no element will be removed from the container.
If elem2 or both elem1 and elem2 are the off-the-end iterator, then all elements from elem1 to the last element in the container will be removed.
If elem1 and elem2 are equal, then no element will be removed from the container.
If elem2 or both elem1 and elem2 are the off-the-end iterator, then all elements from elem1 to the last element in the container will be removed.