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<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">I suspect it was accidental, but Richard will doubtless say in due course<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">Simon<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif""> ghc-devs [mailto:ghc-devs-bounces@haskell.org]
<b>On Behalf Of </b>Johan Tibell<br>
<b>Sent:</b> 12 May 2014 15:35<br>
<b>To:</b> Gabor Greif<br>
<b>Cc:</b> ghc-devs<br>
<b>Subject:</b> Re: classP recently deleted from TH.Lib<o:p></o:p></span></p>
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That would be nice. I had to fix some breakage caused by this in one of Bryan's libraries.<o:p></o:p></p>
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On Mon, May 12, 2014 at 4:12 PM, Gabor Greif <<a href="mailto:ggreif@gmail.com" target="_blank">ggreif@gmail.com</a>> wrote:<o:p></o:p></p>
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The last two commits from (Apr 9) on<br>
<br>
<<a href="https://github.com/ghc/packages-template-haskell/commits/master/Language/Haskell/TH/Lib.hs" target="_blank">https://github.com/ghc/packages-template-haskell/commits/master/Language/Haskell/TH/Lib.hs</a>><br>
<br>
removed a helper to construct applied type class constraints (`classP`).<br>
<br>
Some packages (notably `llvm-general-pure`) though, depend on it.<br>
<br>
Can we add back something like this:<br>
<br>
{{{<br>
classP :: Name -> [Q Type] -> Q Pred<br>
classP cla tys<br>
= do<br>
tysl <- sequence tys<br>
return (foldl' AppT (ConT cla) tysl)<br>
}}}<br>
<br>
and export it again? Or is there such a helper with a different name already?<br>
<br>
Cheers,<br>
<br>
Gabor<br>
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<o:p> </o:p></p>
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