<div dir="ltr">Hello,<div><br></div><div>Trevor Elliott and I have been slowly working on implementing Simon M's  "Mutable Constructor Fields" proposal [1].</div><div><br></div><div>The current state of the code is here:</div><div><div><a href="https://github.com/yav/ghc/tree/wip/mutable-fields">https://github.com/yav/ghc/tree/wip/mutable-fields</a><br></div></div><div><br></div><div>I am not sure if this would be ready in time for 8.4 as I don't know what the time-line looks like, and also, the actual proposal is still in the process of being reviewed by the GHC committee.</div><div><br></div><div>-Iavor </div><div><br></div><div>[1] <a href="https://github.com/simonmar/ghc-proposals/blob/mutable-fields/proposals/0000-mutable-fields.rst">https://github.com/simonmar/ghc-proposals/blob/mutable-fields/proposals/0000-mutable-fields.rst</a></div><div><br></div><div><br><br><div class="gmail_quote"><div dir="ltr">On Sun, Sep 3, 2017 at 2:15 PM Simon Peyton Jones via ghc-devs <<a href="mailto:ghc-devs@haskell.org">ghc-devs@haskell.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





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<p class="MsoNormal">Ben, Simon, and ghc-devs<u></u><u></u></p>
<p class="MsoNormal">I have to write slides for the GHC status talk in the Haskell Implementor’s meeting.<u></u><u></u></p>
<p class="MsoNormal">Usually we have<u></u><u></u></p>
<ol style="margin-top:0cm" start="1" type="1">
<li class="m_7174708322117634639MsoListParagraph" style="margin-left:0cm">Current status (current release)<u></u><u></u></li><li class="m_7174708322117634639MsoListParagraph" style="margin-left:0cm">What’s cooking for the next release<u></u><u></u></li><li class="m_7174708322117634639MsoListParagraph" style="margin-left:0cm">GHC community comments<u></u><u></u></li></ol>
<p class="MsoNormal">As background we have<u></u><u></u></p>
<ul style="margin-top:0cm" type="disc">
<li class="m_7174708322117634639MsoListParagraph" style="margin-left:0cm">Our <a href="https://ghc.haskell.org/trac/ghc/wiki/Status/Apr17" target="_blank">
Apr 17 status page</a><u></u><u></u></li><li class="m_7174708322117634639MsoListParagraph" style="margin-left:0cm">Our <a href="https://downloads.haskell.org/~ghc/8.2.1/docs/html/users_guide/8.2.1-notes.html" target="_blank">
8.2 release notes</a><u></u><u></u></li><li class="m_7174708322117634639MsoListParagraph" style="margin-left:0cm">Our <a href="https://ghc.haskell.org/trac/ghc/wiki/Status/GHC-8.4.1" target="_blank">
8.4 status page</a><u></u><u></u></li></ul>
<p class="MsoNormal">What would you put under (1-3)?  Anything you’d like to see highlighted?<br>
<br>
<u></u><u></u></p>
<p class="MsoNormal">Simon<u></u><u></u></p>
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