<div class="gmail_quote">On Sun, Jan 8, 2012 at 8:32 AM, Bas van Dijk <span dir="ltr"><<a href="mailto:v.dijk.bas@gmail.com">v.dijk.bas@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="im">On 23 December 2011 17:44, Simon Peyton-Jones <<a href="mailto:simonpj@microsoft.com">simonpj@microsoft.com</a>> wrote:<br>
> My attempt at forming a new understanding was driven by your example.<br>
><br>
> class Functor f where<br>
> type C f :: * -> Constraint<br>
> type C f = ()<br>
><br>
> sorry -- that was simply type incorrect. () does not have kind * -><br>
> Constraint<br>
<br>
</div>So am I correct that the `class Empty a; instance Empty a` trick is<br>
currently the only way to get default associated empty constraints?<br></blockquote><div><br></div><div>Yes.</div></div>