<div dir="ltr"><div>I haven't taken time to check that the specification that Vlad wrote is the same as that of -XExtendedForAllScope for type signatures and function definitions. But I trust that Vlad did his homework.</div><div><br></div><div>This makes perfect sense to me, though I'm not sure this is worth spending time on, considering that we seem to be going in the direction to deprecate -XExtendedForAllScope.<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, 12 Feb 2024 at 23:39, Simon Peyton Jones <<a href="mailto:simon.peytonjones@gmail.com">simon.peytonjones@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif">I support this too.</div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif">Simon<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, 10 Feb 2024 at 03:10, Eric Seidel <<a href="mailto:eric@seidel.io" target="_blank">eric@seidel.io</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Dear Committee,<br>
<br>
Vlad has found what looks like a clear gap in the interaction between<br>
two extensions: -XStandaloneKindSignatures and -XExtendedForAllScope.<br>
<br>
I think it's quite obvious that under -XExtendedForAllScope the forall<br>
in a standalone kind signature should behave like the forall in a<br>
standalone type signature, i.e. it should scope over the definition<br>
as well.<br>
<br>
I recommend accepting this amendment to StandaloneKindSignatures.<br>
<br>
Eric<br>
<br>
<a href="https://github.com/ghc-proposals/ghc-proposals/pull/592" rel="noreferrer" target="_blank">https://github.com/ghc-proposals/ghc-proposals/pull/592</a><br>
<a href="https://github.com/int-index/ghc-proposals/blob/scoped-saks/proposals/0054-kind-signatures.rst#proposed-change-specification" rel="noreferrer" target="_blank">https://github.com/int-index/ghc-proposals/blob/scoped-saks/proposals/0054-kind-signatures.rst#proposed-change-specification</a><br>
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</blockquote></div>
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</blockquote></div><br clear="all"><br><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr">Arnaud Spiwack<br>Director, Research at <a href="https://moduscreate.com" rel="noopener noreferrer" target="_blank">https://moduscreate.com</a> and <a href="https://tweag.io" rel="noopener noreferrer" target="_blank">https://tweag.io</a>.</div></div>