<div dir="ltr">I have updated the Wiki.<br></div><div class="gmail_extra"><br><div class="gmail_quote">On 9 May 2018 at 10:15, Simon Peyton Jones <span dir="ltr"><<a href="mailto:simonpj@microsoft.com" target="_blank">simonpj@microsoft.com</a>></span> wrote:<br><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"><span style="font-size:12.0pt">Thanks. <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">I am absolutely behind this objective:<u></u><u></u></span></p>
<p class="MsoNormal" style="margin-left:36.0pt">I propose to move the API Annotations to where they belong, inside the AST.<span style="font-size:12.0pt"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Indeed I thought that was always part of the TTG plan.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><i><span style="font-size:12.0pt">But I don’t understand what this has to do with interactive vs batch parsing.
</span></i><span style="font-size:12.0pt">Why don’t you unconditionally retain API-annotation info? How would GhcPs be used differently to GhcPsI?<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">You might want to answer by clarifying on the wiki page, so that it is a persistent record of the design debugged in dialogue by email.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Simon<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><u></u> <u></u></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Alan & Kim Zimmerman <<a href="mailto:alan.zimm@gmail.com" target="_blank">alan.zimm@gmail.com</a>>
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<b>Sent:</b> 08 May 2018 21:02<br>
<b>To:</b> Simon Peyton Jones <<a href="mailto:simonpj@microsoft.com" target="_blank">simonpj@microsoft.com</a>><br>
<b>Cc:</b> ghc-devs <<a href="mailto:ghc-devs@haskell.org" target="_blank">ghc-devs@haskell.org</a>><br>
<b>Subject:</b> Re: TTG hsSyn for Batch and Interactive Parsing<u></u><u></u></span></p>
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I have started a wiki page at <a href="https://ghc.haskell.org/trac/ghc/wiki/ImplementingTreesThatGrow/IdeSupport" target="_blank">
https://ghc.haskell.org/trac/<wbr>ghc/wiki/<wbr>ImplementingTreesThatGrow/<wbr>IdeSupport</a><u></u><u></u></p>
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<u></u> <u></u></p>
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On 8 May 2018 at 10:54, Simon Peyton Jones <<a href="mailto:simonpj@microsoft.com" target="_blank">simonpj@microsoft.com</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:12.0pt">At first blush, “running the parser in two modes” and “changing the Pass” type don’t match up in my mind. One seems quite local (how to run the parser).
The other seems more pervasive.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:12.0pt"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Can you say more about your proposed design, perhaps even on a wiki page?</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:12.0pt"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Simon</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:12.0pt"> </span><u></u><u></u></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> ghc-devs <<a href="mailto:ghc-devs-bounces@haskell.org" target="_blank">ghc-devs-bounces@haskell.org</a>>
<b>On Behalf Of </b>Alan & Kim Zimmerman<br>
<b>Sent:</b> 07 May 2018 16:17<br>
<b>To:</b> ghc-devs <<a href="mailto:ghc-devs@haskell.org" target="_blank">ghc-devs@haskell.org</a>><br>
<b>Subject:</b> TTG hsSyn for Batch and Interactive Parsing</span><u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">I want to be able to run the GHC parser in one of two modes, batch which functions as now, and interactive which will (eventually) be incremental.<u></u><u></u></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">In addition, the hsSyn AST for each will have different TTG[1] annotations, so that it can better support IDE usage.<u></u><u></u></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">I think this can be done by changing the types in HsExtension to introduce a 'Process' type as follows<br>
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data Pass = Parsed Process | Renamed | Typechecked<br>
deriving (Data)<br>
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data Process = Batch | Interactive<br>
deriving (Show, Data)<u></u><u></u></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">We then rename the pass synonyms so that batch is the default<br>
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type GhcPs = GhcPass ('Parsed 'Batch)<br>
type GhcPsI = GhcPass ('Parsed 'Interactive)<u></u><u></u></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">I have attached a simple proof of concept file, which emulates parsing and renaming.<u></u><u></u></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Is this an appropriate approach to take?<u></u><u></u></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Alan<u></u><u></u></p>
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<p class="MsoNormal" style="margin-bottom:6.0pt"> <u></u><u></u></p>
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<p class="MsoNormal" style="margin-bottom:6.0pt">[1] Trees That Grow
<a href="https://ghc.haskell.org/trac/ghc/wiki/ImplementingTreesThatGrow" target="_blank">
https://ghc.haskell.org/trac/<wbr>ghc/wiki/<wbr>ImplementingTreesThatGrow</a><u></u><u></u></p>
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