Increase length by 1, returning pointer to the new item. Asserts that there is already space for the new item without allocating more. The returned pointer becomes invalid when the list is resized. Does not invalidate element pointers.
Increase length by 1, returning pointer to the new item. Asserts that there is already space for the new item without allocating more. The returned pointer becomes invalid when the list is resized. Does not invalidate element pointers.