> temp sub infix:^[<op>] is force_hash_to_intersect ; Right. A property used as you suggest is effectively an adverb applied at op definition rather than use.
> maybe somebody will wont ( 1,2 ) ^[op] ( 1, 2, 3 ) to return array of > length 3 ; Right. It's quite plausible that one would want to be able to control this at op use, rather than definition. -- ralph