https://issues.dlang.org/show_bug.cgi?id=16657
--- Comment #6 from Andrei Alexandrescu <[email protected]> --- Upon further consideration we need to fix this. Requiring people who use the "alias this" feature to also remember to define "opEquals" is the kind of long-distance dependency that is the subject of "Effective D" tidbits of advice of the exact kind we do our best to avoid. --
