Reverse sort random access range R of aggregates on value of calls to xtor.
http://forum.dlang.org/thread/nqwzojnlidlsmpunpqqy@forum.dlang.org#post-dmfvkbfhzigecnwglrur:40forum.dlang.org
See Implementation
Reverse sort random access range R of aggregates on value of calls to xtor.