PUBLIC
PUBLIC
Indeed, I am using 9.0.1. I'll try upgrading. Thanks!
From: Simon Peyton Jones <simo...@microsoft.com>
Sent: Wednesday, October 6, 2021 6:12 PM
To: Erdi, Gergo <gergo.e...@sc.com>
Cc: Montelatici, Raphael Laurent <raphael.montelat...@sc.com>; GHC
<ghc-devs@haskell.org>
Subject: [External] RE: Specialisation doesn't kick in (RE: Instantiation of
overloaded definition *in Core*)
Grego,
Yes I think that should auto-specialise.
Which version of GHC are you using? Do you have this patch?
commit ef0135934fe32da5b5bb730dbce74262e23e72e8
Author: Simon Peyton Jones simo...@microsoft.com<mailto:simo...@microsoft.com>
Date: Thu Apr 8 22:42:31 2021 +0100
Make the specialiser handle polymorphic specialisation
Here's why I ask. The call
$fMonadIO_$c>> = \ (@a) (@b) -> $dm>> @IO $fMonadIO @a @b
indeed applies $dm>> to $fMonadIO, but it also applies it to a and b. In the
version of GHC you have, maybe that stops the call from floating up to the
definition site, and being used to specialise it.
Can you make a repro case without your plugin?
Simon
PS: I am leaving Microsoft at the end of November 2021, at which point
simo...@microsoft.com<mailto:simo...@microsoft.com> will cease to work. Use
simon.peytonjo...@gmail.com<mailto:simon.peytonjo...@gmail.com> instead. (For
now, it just forwards to simo...@microsoft.com<mailto:simo...@microsoft.com>.)
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