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PUBLIC<br>
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<p class="msipheader7557e74b" style="margin:0in"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#317100">PUBLIC</span><o:p></o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Basically I want to skip everything that can’t possibly needed after full specialization, i.e. dictionary and default method definitions and method accesors. But I realize now
that I should just look at the types, and skip anything with a non-empty context, since after full specialization I should, transitively, also have no need for normal top-level function definitions that have a context.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
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<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span lang="EN-US" style="mso-fareast-language:EN-GB">From:</span></b><span lang="EN-US" style="mso-fareast-language:EN-GB"> Simon Peyton Jones <simonpj@microsoft.com>
<br>
<b>Sent:</b> Wednesday, December 1, 2021 4:57 PM<br>
<b>To:</b> Erdi, Gergo <Gergo.Erdi@sc.com><br>
<b>Cc:</b> GHC <ghc-devs@haskell.org><br>
<b>Subject:</b> [External] RE: Recognizing default method implementations<o:p></o:p></span></p>
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</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p style="margin:15.0pt"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#317100">PUBLIC<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<div>
<div style="border:solid red 1.0pt;padding:0in 0in 0in 0in">
<p class="MsoNormal" style="line-height:12.0pt"><span style="font-size:10.0pt;color:red;mso-fareast-language:EN-GB">ATTENTION: This email came from an external source. Do not open attachments or click on links from unknown senders or unexpected emails.<strong><span style="font-family:"Calibri",sans-serif">
Always report</span></strong> suspicious emails using the <strong><span style="font-family:"Calibri",sans-serif">Report As Phishing</span></strong> button in Outlook to protect the Bank and our clients.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Is there a way to recognize that an Id / Var refers to a default method implementation, e.g. $dm/= in the following?<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m afraid not. There has never been a reason to do so. And it might not be robust e.g. it might be inlined.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">What is the problem you are trying to solve?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Simon<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal"><span style="font-size:8.0pt;mso-fareast-language:EN-GB">PS: I am leaving Microsoft at the end of November 2021, at which point
<a href="mailto:simonpj@microsoft.com"><span style="color:#0563C1">simonpj@microsoft.com</span></a> will cease to work. Use
<a href="mailto:simon.peytonjones@gmail.com"><span style="color:#0563C1">simon.peytonjones@gmail.com</span></a> instead. (For now, it just forwards to
<a href="mailto:simonpj@microsoft.com">simonpj@microsoft.com</a>.)<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div style="border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt">
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<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span lang="EN-US" style="mso-fareast-language:EN-GB">From:</span></b><span lang="EN-US" style="mso-fareast-language:EN-GB"> ghc-devs <<a href="mailto:ghc-devs-bounces@haskell.org">ghc-devs-bounces@haskell.org</a>>
<b>On Behalf Of </b>Erdi, Gergo via ghc-devs<br>
<b>Sent:</b> 01 December 2021 05:22<br>
<b>To:</b> 'GHC' <<a href="mailto:ghc-devs@haskell.org">ghc-devs@haskell.org</a>><br>
<b>Subject:</b> [EXTERNAL] Recognizing default method implementations<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="msipheader7557e74b" style="margin:0in"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#317100">PUBLIC</span><o:p></o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Is there a way to recognize that an Id / Var refers to a default method implementation, e.g. $dm/= in the following?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Lucida Console"">$dm/= :: forall a. Eq a => a -> a -> Bool<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Lucida Console"">[GblId, Arity=3, Unf=OtherCon []]<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Lucida Console"">$dm/=<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Lucida Console""> = \ (@a_ahz)<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Lucida Console""> ($dEq_sI6 [Occ=Once1] :: Eq a_ahz)<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Lucida Console""> (x_sI7 [Occ=Once1] :: a_ahz)<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Lucida Console""> (y_sI8 [Occ=Once1] :: a_ahz) -><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Lucida Console""> case == @a_ahz $dEq_sI6 x_sI7 y_sI8 of {<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Lucida Console""> False -> True;<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Lucida Console""> True -> False<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:"Lucida Console""> }<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Gergo<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB"><br>
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