<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Sat, Feb 21, 2015 at 6:44 PM, Michael Orlitzky <span dir="ltr"><<a href="mailto:michael@orlitzky.com" target="_blank">michael@orlitzky.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I don't think you can do that</blockquote></div><br>You can't, at present. (Note: Typeclasses are not OOP classes; `class (Num a, Group a) => Additive a` does not declare superclasses, but prerequisites.)<br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><div>brandon s allbery kf8nh                               sine nomine associates</div><div><a href="mailto:allbery.b@gmail.com" target="_blank">allbery.b@gmail.com</a>                                  <a href="mailto:ballbery@sinenomine.net" target="_blank">ballbery@sinenomine.net</a></div><div>unix, openafs, kerberos, infrastructure, xmonad        <a href="http://sinenomine.net" target="_blank">http://sinenomine.net</a></div></div></div>
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