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<p class="MsoNormal"><span style="font-size:12.0pt">I have not dug into the details, but the general direction of this proposal looks fine to me.<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">Simion<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-steering-committee [mailto:ghc-steering-committee-bounces@haskell.org]
<b>On Behalf Of </b>Iavor Diatchki<br>
<b>Sent:</b> 01 November 2017 22:52<br>
<b>To:</b> Christopher Allen <cma@bitemyapp.com><br>
<b>Cc:</b> ghc-steering-committee@haskell.org; Joachim Breitner <mail@joachim-breitner.de><br>
<b>Subject:</b> Re: [ghc-steering-committee] Underscores in numbers proposal<o:p></o:p></span></p>
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I am fine with this. Related to our recent discussion: we should probably require that this be protected by a language extension, like all other literal notations. Perhaps `UnderscoreLiterals`?<o:p></o:p></p>
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-Iavor<o:p></o:p></p>
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PS: technically, this is not backward compatible :-) Here is an example:<o:p></o:p></p>
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<o:p> </o:p></p>
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<span style="font-family:"Courier New""> instance Num b => Num (a -> b) where</span><o:p></o:p></p>
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<span style="font-family:"Courier New""> fromInteger = const . fromInteger</span><o:p></o:p></p>
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<o:p> </o:p></p>
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<span style="font-family:"Courier New""> test :: Integer</span><o:p></o:p></p>
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<span style="font-family:"Courier New""> test = 1_1</span><o:p></o:p></p>
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<span style="font-family:"Courier New""> where _1 = 2</span><o:p></o:p></p>
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Currently this evaluates to 1, but with the extension it will evaluate to 11. I don't think that any real code would be affected by this, I just had a bit of fun writing it.<o:p></o:p></p>
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<o:p> </o:p></p>
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<o:p> </o:p></p>
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<o:p> </o:p></p>
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On Wed, Nov 1, 2017 at 2:33 PM Christopher Allen <<a href="mailto:cma@bitemyapp.com" target="_blank">cma@bitemyapp.com</a>> wrote:<o:p></o:p></p>
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<a href="https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fghc-proposals%2Fghc-proposals%2Fpull%2F76%23issuecomment-339952996&data=02%7C01%7Csimonpj%40microsoft.com%7Cd576f1b858a74aa4072e08d5217b4867%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636451735748183647&sdata=WqWuPZ4czfYVVWP6Q%2B0%2BRnMF0j1MSdgJZS4VvY7%2FzYQ%3D&reserved=0" target="_blank">https://github.com/ghc-proposals/ghc-proposals/pull/76#issuecomment-339952996</a><br>
<br>
This appears to have near universal approval. It's certainly a feature<br>
I've been grateful for when writing Rust code. I wasn't able to find a<br>
thread about this proposal in my email archives, so I apologize if<br>
this was redundant.<br>
<br>
Could this be moved to a decision soon?<br>
<br>
Thank you,<br>
Chris Allen<br>
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<a href="https://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-steering-committee" target="_blank">https://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-steering-committee</a><o:p></o:p></p>
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