q{<}    =>  sub { qblop(swap(@_), sub { $_[0] < $_[1]   })},
q{<=>}  =>  sub { qblop(swap(@_), sub { $_[0] <=> $_[1] })},
... all kinds of other tests
q{~}    =>  sub { $_[0]->quop(sub { ~$_[0]     })},