bsl::deque::resize

Change the size of this deque to the specified newSize. Erase size() - newSize elements at the back if newSize < size(). Append newSize - size() elements at the back having the optionally specified value if newSize > size(); if value is not specified, value-initialized objects of the (template parameter) VALUE_TYPE are emplaced. This method has no effect if newSize == size(). Throw bsl::length_error if newSize > max_size().