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<h3 style="margin-top: 20px; margin-bottom: 10px;">
sheaf pushed to branch wip/T22717 at <a href="https://gitlab.haskell.org/ghc/ghc" style="color: #1068bf;">Glasgow Haskell Compiler / GHC</a>
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<h4 style="margin-top: 10px; margin-bottom: 10px;">
Commits:
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<ul>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/17b6e7402b14e85059b553a7b6dda10826216eb7" style="color: #1068bf;">17b6e740</a></strong>
<div>
<span> by Simon Peyton Jones </span> <i> at 2023-01-26T16:25:30+01:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Detect family instance orphans correctly
We were treating a type-family instance as a non-orphan if there
was a type constructor on its /right-hand side/ that was local. Boo!
Utterly wrong. With this patch, we correctly check the /left-hand side/
instead!
Fixes #22217
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/53b3fb88deef51469e21b6ceafa22d01d7c78558" style="color: #1068bf;">53b3fb88</a></strong>
<div>
<span> by Simon Peyton Jones </span> <i> at 2023-01-26T16:25:44+01:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Report family instance orphans correctly
This fixes the fact that we were not reporting orphan family instance
at all. The fix here is easy, but touches a bit of code. I refactored
the code to be much more similar to the way that class instances are done:
- Add a fi_orphan field to FamInst, like the is_orphan field in ClsInst
- Make newFamInst initialise this field, just like newClsInst
- And make newFamInst report a warning for an orphan, just like newClsInst
- I moved newFamInst from GHC.Tc.Instance.Family to GHC.Tc.Utils.Instantiate,
just like newClsInst.
- I added mkLocalFamInst to FamInstEnv, just like mkLocalClsInst in InstEnv
- TcRnOrphanInstance and SuggestFixOrphanInstance are now parametrised
over class vs instance.
Fixes #19773
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ee2fa9d4a6b9e63c26852efcf53b4839feea3ed6" style="color: #1068bf;">ee2fa9d4</a></strong>
<div>
<span> by Simon Peyton Jones </span> <i> at 2023-01-26T16:26:25+01:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Avoid orphans in STG
This patch removes some orphan instances in the STG namespace
by introducing the GHC.Stg.Lift.Types module, which allows various
type family instances to be moved to GHC.Stg.Syntax, avoiding orphan
instances.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3d828e6d208cb5964d68eb698721e84d41060440" style="color: #1068bf;">3d828e6d</a></strong>
<div>
<span> by Simon Peyton Jones </span> <i> at 2023-01-26T16:26:25+01:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Avoid orphans in the parser
This moves Anno instances for PatBuilder from GHC.Parser.PostProcess
to GHC.Parser.Types to avoid orphans.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e5a9c8d43fe76aa2ecf65c92bd1b1d15324dfd8a" style="color: #1068bf;">e5a9c8d4</a></strong>
<div>
<span> by Simon Peyton Jones </span> <i> at 2023-01-26T16:26:25+01:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.8125rem; color: #303030; position: relative; font-family: "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; word-break: break-all; word-wrap: break-word; background-color: #fafafa; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dbdbdb;'>Accept an orphan declaration (sadly)
This accepts the orphan type family instance
type instance DsForeignHook = ...
in GHC.HsToCore.Types.
See Note [The Decoupling Abstract Data Hack] in GHC.Driver.Hooks
</pre>
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30 changed files:
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<a href="#d0d96a6d03668aeab20ebe05e2c4ccb798c7e64c" style="color: #1068bf;">
compiler/GHC.hs
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<a href="#182d6a315e784018aa9c8b2ad736036b97bd5d48" style="color: #1068bf;">
compiler/GHC/Core.hs
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<a href="#448d7f6e0151c2014de38dead3a902f511c45b75" style="color: #1068bf;">
compiler/GHC/Core/FVs.hs
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<a href="#91648438362e5a35363d2bb7abb04016dedd7d7e" style="color: #1068bf;">
compiler/GHC/Core/FamInstEnv.hs
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<a href="#5596bb0f228bd2a308c4391df97375ae879430a8" style="color: #1068bf;">
compiler/GHC/Core/InstEnv.hs
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compiler/GHC/Driver/Hooks.hs
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compiler/GHC/HsToCore/Types.hs
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compiler/GHC/Iface/Make.hs
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compiler/GHC/IfaceToCore.hs
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<a href="#446cb12ca6cefaf1c6eb79b7db643632744263c7" style="color: #1068bf;">
compiler/GHC/Parser/PostProcess.hs
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compiler/GHC/Parser/Types.hs
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compiler/GHC/Stg/InferTags/TagSig.hs
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compiler/GHC/Stg/InferTags/Types.hs
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compiler/GHC/Stg/Lift/Analysis.hs
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compiler/GHC/Stg/Lift/Types.hs
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compiler/GHC/Stg/Syntax.hs
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compiler/GHC/Tc/Deriv/Generate.hs
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compiler/GHC/Tc/Deriv/Generics.hs
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compiler/GHC/Tc/Errors/Ppr.hs
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compiler/GHC/Tc/Errors/Types.hs
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compiler/GHC/Tc/Instance/Family.hs
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compiler/GHC/Types/Hint/Ppr.hs
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