What I said is not true since overlapping instances are not that much decidable.<div><br></div><div>Btw, in previous versions of GHC this worked well, but now I suppose order does not suffices to define instances overlapping</div>
<div><br class="webkit-block-placeholder"></div><div>How could I compile such an example, assuming that I want to use the instance C String for Strings only and the more general instance for the rest?</div><div><br class="webkit-block-placeholder">
</div><div><div>class C a where</div><div>&nbsp;&nbsp; &nbsp;c :: a</div><div><br class="webkit-block-placeholder"></div><div>instance C Char where</div><div>&nbsp;&nbsp; &nbsp;c = &#39;a&#39;</div><div>&nbsp;&nbsp; &nbsp;</div><div>instance C a =&gt; C [a] where</div>
<div>&nbsp;&nbsp; &nbsp;c = [c :: a,c :: a]</div><div>&nbsp;&nbsp; &nbsp;</div><div>instance C String where</div><div>&nbsp;&nbsp; &nbsp;c = &quot;a&quot;</div><div><br class="webkit-block-placeholder"></div><div>cc = c :: String</div><div><br class="webkit-block-placeholder">
</div><div><div>Sorry for the newbie question.</div><div>hugo</div></div></div>