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<p class="MsoNormal"><span style="font-size:12.0pt">I like the idea of distinguishing “signatures” from “annotations”.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">But then what is currently a “pattern signature” with extension -XPatternSignatures, becomes “type annotation in a pattern” or perhaps “pattern type-annotation” which is a bit clumsy.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Possibly “type specification” instead of “type annotation”. Thus “pattern type-spec” which is snappier.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Simon<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> ghc-devs [mailto:ghc-devs-bounces@haskell.org]
<b>On Behalf Of </b>Spiwack, Arnaud<br>
<b>Sent:</b> 08 January 2018 10:11<br>
<b>Cc:</b> Joachim Breitner <mail@joachim-breitner.de>; ghc-devs@haskell.org<br>
<b>Subject:</b> Re: pattern signatures<o:p></o:p></span></p>
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In my eyes, signatures are something which goes with a definition.<o:p></o:p></p>
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So (a) is a pattern (synonym) signature, while (b) is merely a type annotation on a pattern.<br>
<br>
<o:p></o:p></p>
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<o:p> </o:p></p>
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On Fri, Jan 5, 2018 at 11:23 PM, Iavor Diatchki <<a href="mailto:iavor.diatchki@gmail.com" target="_blank">iavor.diatchki@gmail.com</a>> wrote:<o:p></o:p></p>
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Well, as you say, "pattern signature" makes sense for both, so I would expect to use context to disambiguate. If I wanted to be explicit about which one I meant, I'd use:<o:p></o:p></p>
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<o:p> </o:p></p>
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a) "Pattern synonym signature"<o:p></o:p></p>
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b) "Signature on a pattern"<o:p></o:p></p>
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<span style="color:#888888"><o:p> </o:p></span></p>
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<span style="color:#888888">-Iavor<o:p></o:p></span></p>
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<span style="color:#888888"><o:p> </o:p></span></p>
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<span style="color:#888888"><o:p> </o:p></span></p>
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<span style="color:#888888"><o:p> </o:p></span></p>
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<o:p> </o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:6.0pt;margin-right:0cm;margin-bottom:6.0pt;margin-left:0cm">
On Fri, Jan 5, 2018 at 1:12 PM Joachim Breitner <<a href="mailto:mail@joachim-breitner.de" target="_blank">mail@joachim-breitner.de</a>> wrote:<o:p></o:p></p>
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Hi,<br>
<br>
Am Freitag, den 05.01.2018, 13:42 -0500 schrieb Brandon Allbery:<br>
> Further complicated by the fact that that form used to be called a<br>
> "pattern signature" with accompanying extension, until that was<br>
> folded into ScopedTypeVariables extension.<br>
<br>
which I find super confusing, because sometimes I want a signature on a<br>
pattern and it is counter-intuitive to me why I should not longer use<br>
the obviously named PatternSignatures extension but rather the at first<br>
glance unrelated ScopedTypeVariable extension.<br>
<br>
But I am derailing the discussion a bit.<br>
<br>
Cheers,<br>
Joachim<br>
<br>
--<br>
Joachim Breitner<br>
<a href="mailto:mail@joachim-breitner.de" target="_blank">mail@joachim-breitner.de</a><br>
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http://www.joachim-breitner.de/</a><o:p></o:p></p>
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