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<h3 style="margin-top: 20px; margin-bottom: 10px;">
Marge Bot pushed to branch wip/marge_bot_batch_merge_job at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4 style="margin-top: 10px; margin-bottom: 10px;">
Commits:
</h4>
<ul>
<li>
<strong style="font-weight: 600;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8b2f70a202ec0913515bf4945de789e959ff8cac">8b2f70a2</a></strong>
<div>
<span> by Andrei Borzenkov </span> <i> at 2024-08-01T23:00:46-04:00 </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;'>Type syntax in expressions (#24159, #24572, #24226)
This patch extends the grammar of expressions with syntax that is
typically found only in types:
* function types (a -> b), (a ->. b), (a %m -> b)
* constrained types (ctx => t)
* forall-quantification (forall tvs. t)
The new forms are guarded behind the RequiredTypeArguments extension,
as specified in GHC Proposal #281. Examples:
{-# LANGUAGE RequiredTypeArguments #-}
e1 = f (Int -> String) -- function type
e2 = f (Int %1 -> String) -- linear function type
e3 = f (forall a. Bounded a => a) -- forall type, constraint
The GHC AST and the TH AST have been extended as follows:
syntax | HsExpr | TH.Exp
---------------+----------+--------------
a -> b | HsFunArr | ConE (->)
a %m -> b | HsFunArr | ConE FUN
ctx => t | HsQual | ConstrainedE
forall a. t | HsForAll | ForallE
forall a -> t | HsForAll | ForallVisE
Additionally, a new warning flag -Wview-pattern-signatures has been
introduced to aid with migration to the new precedence of (e -> p :: t).
Co-authored-by: Vladislav Zavialov <vlad.z.4096@gmail.com>
</pre>
</li>
<li>
<strong style="font-weight: 600;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/66e7f57d0fa2fdc87f7ab8b14d530eda7111ac19">66e7f57d</a></strong>
<div>
<span> by Brandon Chinn </span> <i> at 2024-08-01T21:50:58-07:00 </i>
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<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;'>Implement MultilineStrings (#24390)
This commit adds support for multiline strings, proposed at
https://github.com/ghc-proposals/ghc-proposals/pull/569.
Multiline strings can now be written as:
myString =
"""
this is a
multiline string
"""
The multiline string will have leading indentation stripped away.
Full details of this post-processing may be found at the new
GHC.Parser.String module.
In order to cleanly implement this and maximize reusability, I
broke out the lexing logic for strings out of Lexer.x into a
new GHC.Parser.String module, which lexes strings with any
provided "get next character" function. This also gave us the
opportunity to clean up this logic, and even optimize it a bit.
With this change, parsing string literals now takes 25% less
time and 25% less space.
</pre>
</li>
<li>
<strong style="font-weight: 600;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/399c75a700078df1678897778c74e188dca0d09d">399c75a7</a></strong>
<div>
<span> by Matthew Pickering </span> <i> at 2024-08-02T11:37:02-04:00 </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;'>hadrian: Make sure ffi headers are built before using a compiler
When we are using ffi adjustors then we rely on `ffi.h` and
`ffitarget.h` files during code generation when compiling stubs.
Therefore we need to add this dependency to the build system (which this
patch does).
Reproducer, configure with `--enable-libffi-adjustors` and then build
"_build/stage1/libraries/ghc-prim/build/GHC/Types.p_o".
Observe that this fails before this patch and works afterwards.
Fixes #24864
</pre>
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<h4 style="margin-top: 10px; margin-bottom: 10px;">
30 changed files:
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<a href="#06764eb0158306b83ab1998d18316392a51838c2">
compiler/GHC/Builtin/Names/TH.hs
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<a href="#2e5692f568fd7b67a6b172e2a60469da8392508c">
compiler/GHC/Driver/Flags.hs
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<a href="#774d88050336ef660c7a219fb06c480c2fc639bc">
compiler/GHC/Driver/Session.hs
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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/Lit.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/Type.hs
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compiler/GHC/HsToCore/Expr.hs
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<a href="#f017e4c978a9ff341ce5a7b838787fd2a4758b59">
compiler/GHC/HsToCore/Match/Literal.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/Parser.y
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compiler/GHC/Parser/Annotation.hs
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compiler/GHC/Parser/CharClass.hs
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compiler/GHC/Parser/Errors/Ppr.hs
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compiler/GHC/Parser/Errors/Types.hs
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compiler/GHC/Parser/Lexer.x
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<a href="#446cb12ca6cefaf1c6eb79b7db643632744263c7">
compiler/GHC/Parser/PostProcess.hs
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compiler/GHC/Parser/String.hs
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compiler/GHC/Rename/Expr.hs
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compiler/GHC/Rename/HsType.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/Gen/App.hs
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compiler/GHC/Tc/Gen/Expr.hs
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<a href="#93bba9b9e0195db135fec54160523a427ea042fd">
compiler/GHC/Tc/Types/Origin.hs
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<a href="#70276ecbf78c4d6abaaaba692722a2a4e2e46167">
compiler/GHC/Tc/Zonk/Type.hs
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The diff was not included because it is too large.
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