<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">I agree -- I think INCOHERENT essentially subsumes the others. Do you have a counter-example?<div class=""><br class=""></div><div class="">Richard<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Nov 25, 2019, at 4:28 PM, Brandon Allbery <<a href="mailto:allbery.b@gmail.com" class="">allbery.b@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">TBH I'd have expected INCOHERENT to cover OVERLAPPABLE, i.e. all bets are off and you've allowed anything including overlaps.</div><br class=""><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Nov 25, 2019 at 11:26 AM DomÃnguez, Facundo <<a href="mailto:facundo.dominguez@tweag.io" class="">facundo.dominguez@tweag.io</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr" class=""><div class="">Dear devs,</div><div class=""><br class=""></div><div class="">I have a program [1] which depends on the ability to specify some instances to be both overlappable and incoherent.<br class=""></div><div class=""><br class=""></div><div class="">GHC so far, allows only one of the OVERLAPPABLE or INCOHERENT pragmas to be specified per instance. One can still have an overlappable and incoherent instance by using -XIncoherenInstances, but this extension is deprecated.</div><div class=""><br class=""></div><div class=""></div><div class="">Is there any chance that a patch is accepted to allow multiple instance pragmas? And if not, what would the reason for this constraint?</div><div class=""><br class=""></div><div class="">Thanks,</div><div class="">Facundo<br class=""></div><div class=""></div><div class=""></div><div class=""><br class=""></div><div class="">[1] <a href="https://gist.github.com/facundominguez/2c0292bf6a721b450c46486ff3b71f24" target="_blank" class="">https://gist.github.com/facundominguez/2c0292bf6a721b450c46486ff3b71f24</a></div></div>
_______________________________________________<br class="">
ghc-devs mailing list<br class="">
<a href="mailto:ghc-devs@haskell.org" target="_blank" class="">ghc-devs@haskell.org</a><br class="">
<a href="http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs" rel="noreferrer" target="_blank" class="">http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs</a><br class="">
</blockquote></div><br clear="all" class=""><div class=""><br class=""></div>-- <br class=""><div dir="ltr" class="gmail_signature"><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class="">brandon s allbery kf8nh</div><div class=""><a href="mailto:allbery.b@gmail.com" target="_blank" class="">allbery.b@gmail.com</a></div></div></div></div></div>
_______________________________________________<br class="">ghc-devs mailing list<br class=""><a href="mailto:ghc-devs@haskell.org" class="">ghc-devs@haskell.org</a><br class="">http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs<br class=""></div></blockquote></div><br class=""></div></body></html>