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<h3 style="margin-top: 20px; margin-bottom: 10px;">
Apoorv Ingle pushed to branch wip/expand-do at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
</h3>
<h4 style="margin-top: 10px; margin-bottom: 10px;">
Commits:
</h4>
<ul>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/30baac7affe7c9d31c0252b669eda804695fb598">30baac7a</a></strong>
<div>
<span> by Tobias Haslop </span> <i> at 2023-11-06T10:50:32+00:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 14px; color: #333238; position: relative; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","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: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>Add laws relating between Foldable/Traversable with their Bi- superclasses
See https://github.com/haskell/core-libraries-committee/issues/205 for
discussion.
This commit also documents that the tuple instances only satisfy the
laws up to lazyness, similar to the documentation added in !9512.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/df626f008230fd55308d8c64d3879d7ec79b44df">df626f00</a></strong>
<div>
<span> by Tobias Haslop </span> <i> at 2023-11-07T02:20:37-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 14px; color: #333238; position: relative; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","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: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>Elaborate on the quantified superclass of Bifunctor
This was requested in the comment
https://github.com/haskell/core-libraries-committee/issues/93#issuecomment-1597271700
for when Traversable becomes a superclass of Bitraversable, but similarly
applies to Functor/Bifunctor, which already are in a superclass relationship.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8217acb8afe883659cdf6e9ccf7a3d6f943f8082">8217acb8</a></strong>
<div>
<span> by Alan Zimmerman </span> <i> at 2023-11-07T02:21:12-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 14px; color: #333238; position: relative; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","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: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>EPA: get rid of l2l and friends
Replace them with
l2l to convert the location
la2la to convert a GenLocated thing
Updates haddock submodule
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/dd88a26052bdef0dd4c00e1a4781ec3ef532c5db">dd88a260</a></strong>
<div>
<span> by Luite Stegeman </span> <i> at 2023-11-07T02:21:53-05:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 14px; color: #333238; position: relative; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","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: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>JS: remove broken newIdents from JStg Monad
GHC.JS.JStg.Monad.newIdents was broken, resulting in duplicate
identifiers being generated in h$c1, h$c2, ... .
This change removes the broken newIdents.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4a7953ac8ea56c6432f9f4b1bf9f8ad53c0d6478">4a7953ac</a></strong>
<div>
<span> by Apoorv Ingle </span> <i> at 2023-11-07T15:45:08+01:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 14px; color: #333238; position: relative; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","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: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>Expand `do` blocks right before typechecking using the `HsExpansion` philosophy.
- A step towards killing `tcSyntaxOp`
- Fixes #18324 #20020 #23147 #22788 #15598 #22086 #21206
- Note [Expanding HsDo with HsExpansion] in `GHC.Tc.Gen.Do` explains change in detail
- Note Note [Doing HsExpansion in the Renamer vs Typechecker] in `GHC.Rename.Expr` expains the rational of doing expansions in type checker as opposed to in the renamer
- New datatype to make this expansion work `GHC.Hs.Expr.XXExprGhcRn`:
1. Expansion bits for Expressions, Statements and Patterns in (`ExpandedThingRn`)
2. `PopErrCtxt` a special GhcRn Phase only artifcat to pop the previous error message in the error context stack
- Kills `HsExpansion` and `HsExpanded` as we have inlined them in `XXExprGhcRn` and `XXExprGhcTc`
- `GHC.Basic.Origin` now tracks the reason for expansion in case of Generated
This is useful for type checking cf. `GHC.Tc.Gen.Expr.tcExpr` case for `HsLam`
- Ensures warnings such as
1. Pattern mach checks
2. Failable patterns
3. non-() return in body statements are preserved
- Expansions inside Template haskell also work without issues.
- Testcases:
* T18324 T20020 T23147 T22788 T15598 T22086
* T23147b (error message check),
* DoubleMatch (match inside a match for pmc check)
* pattern-fails (check pattern match with non-refutable pattern, eg. newtype)
* Simple-rec (rec statements inside do statment)
* T22788 (code snippet from #22788)
* DoExpanion1 (Error messages for body statments)
* DoExpansion2 (Error messages for bind statements)
* DoExpansion3 (Error messages for let statements)
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/c3602f80144a7f21e04d9bd132cbc2b8778bce54">c3602f80</a></strong>
<div>
<span> by Gergő Érdi </span> <i> at 2023-11-07T15:45:12+01:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 14px; color: #333238; position: relative; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","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: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>push the `match_ctxt` business inside `tcMatchLambda`
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3c9b762d7be8c8c07f798279f33da93790e6eb02">3c9b762d</a></strong>
<div>
<span> by Apoorv Ingle </span> <i> at 2023-11-07T15:45:13+01:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 14px; color: #333238; position: relative; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","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: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>- Note changes. Making expansion example a bit more complex
</pre>
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<h4 style="margin-top: 10px; margin-bottom: 10px;">
30 changed files:
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<a href="#cc97d81e7223ad4a3a5e801156ca632f9fa75654">
compiler/GHC/Hs/Expr.hs
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compiler/GHC/Hs/Instances.hs
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compiler/GHC/Hs/Pat.hs
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compiler/GHC/Hs/Syn/Type.hs
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compiler/GHC/Hs/Utils.hs
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compiler/GHC/HsToCore/Arrows.hs
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compiler/GHC/HsToCore/Expr.hs
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compiler/GHC/HsToCore/Match.hs
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compiler/GHC/HsToCore/Quote.hs
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compiler/GHC/HsToCore/Ticks.hs
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compiler/GHC/Iface/Ext/Ast.hs
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compiler/GHC/JS/JStg/Monad.hs
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compiler/GHC/JS/Make.hs
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compiler/GHC/Parser.y
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compiler/GHC/Parser/Annotation.hs
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compiler/GHC/Parser/PostProcess.hs
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compiler/GHC/Rename/Expr.hs
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compiler/GHC/Rename/Module.hs
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compiler/GHC/Rename/Names.hs
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compiler/GHC/Rename/Pat.hs
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compiler/GHC/Rename/Splice.hs
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compiler/GHC/Rename/Utils.hs
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compiler/GHC/Runtime/Eval.hs
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compiler/GHC/Tc/Deriv/Generate.hs
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compiler/GHC/Tc/Gen/App.hs
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compiler/GHC/Tc/Gen/Do.hs
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compiler/GHC/Tc/Gen/Export.hs
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compiler/GHC/Tc/Gen/Expr.hs
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