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<h3>
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>
</h3>
<h4>
Commits:
</h4>
<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/35a7b7ecabeba39e53d6dea78ecc2d3eca8b1b24">35a7b7ec</a></strong>
<div>
<span>by Adam Sandberg Eriksson</span>
<i>at 2020-09-14T17:46:16-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">docs: -B rts option sounds the bell on every GC (#18351)</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5ae8212c3d2f284bc18a562625be3f4640984497">5ae8212c</a></strong>
<div>
<span>by Wander Hillen</span>
<i>at 2020-09-14T17:46:54-04:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Populate gitlab cache after building
</pre>
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<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a5ffb39afc386729c821b924dd2c6a93917e1b5f">a5ffb39a</a></strong>
<div>
<span>by Wander Hillen</span>
<i>at 2020-09-14T17:46:54-04:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Move ahead cabal cache restoration to before use of cabal
</pre>
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<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e8b37c21fdcb9ca515e3dd2fab1661b7792fb728">e8b37c21</a></strong>
<div>
<span>by Wander Hillen</span>
<i>at 2020-09-14T17:46:54-04:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Do the hadrian rebuild multicore
</pre>
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<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/07762eb5cfe735e131a7f017939a6b0ccfb28389">07762eb5</a></strong>
<div>
<span>by Wander Hillen</span>
<i>at 2020-09-14T17:46:54-04:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Also cache other hadrian builds
</pre>
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<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/56ae58263e630bd78b0ef712d0ed20cff4021d07">56ae5826</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-09-14T18:48:05-04:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Care with implicit-parameter superclasses
Two bugs, #18627 and #18649, had the same cause: we were not
account for the fact that a constaint tuple might hide an implicit
parameter.
The solution is not hard: look for implicit parameters in
superclasses. See Note [Local implicit parameters] in
GHC.Core.Predicate.
Then we use this new function in two places
* The "short-cut solver" in GHC.Tc.Solver.Interact.shortCutSolver
which simply didn't handle implicit parameters properly at all.
This fixes #18627
* The specialiser, which should not specialise on implicit parameters
This fixes #18649
There are some lingering worries (see Note [Local implicit
parameters]) but things are much better.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/c1d1d8ef6ff6581c139384df604ad036f1ac311d">c1d1d8ef</a></strong>
<div>
<span>by Zubin Duggal</span>
<i>at 2020-09-14T18:48:07-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Export enrichHie from GHC.Iface.Ext.Ast
This is useful for `ghcide`
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ac3f506ade42880089957bf5c3ec2e5154d037c6">ac3f506a</a></strong>
<div>
<span>by Ryan Scott</span>
<i>at 2020-09-14T18:48:07-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Introduce and use DerivClauseTys (#18662)
This switches `deriv_clause_tys` so that instead of using a list of
`LHsSigType`s to represent the types in a `deriving` clause, it now
uses a sum type. `DctSingle` represents a `deriving` clause with no
enclosing parentheses, while `DctMulti` represents a clause with
enclosing parentheses. This makes pretty-printing easier and avoids
confusion between `HsParTy` and the enclosing parentheses in
`deriving` clauses, which are different semantically.
Fixes #18662.
</pre>
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<h4>29 changed files:</h4>
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.gitlab-ci.yml
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compiler/GHC/Core/Opt/Specialise.hs
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compiler/GHC/Core/Predicate.hs
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compiler/GHC/Hs/Decls.hs
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compiler/GHC/Hs/Extension.hs
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compiler/GHC/Iface/Ext/Ast.hs
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<h4>Changes:</h4>
<li id="587d266bb27a4dc3022bbed44dfa19849df3044c">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#587d266bb27a4dc3022bbed44dfa19849df3044c"><strong>.gitlab-ci.yml</strong></a>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="229" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -229,6 +229,7 @@ lint-release-changelogs:</td>
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<pre style="margin: 0;"> <span id="LC229" class="line" lang="yaml"> <span class="pi">-</span> <span class="s" style="color: #d14;">git checkout .gitmodules</span></span>
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<pre style="margin: 0;"> <span id="LC230" class="line" lang="yaml"> <span class="pi">-</span> <span class="s2" style="color: #d14;">"</span><span class="s" style="color: #d14;">git</span><span class="nv" style="color: #008080;"> </span><span class="s" style="color: #d14;">fetch</span><span class="nv" style="color: #008080;"> </span><span class="s" style="color: #d14;">https://gitlab.haskell.org/ghc/ghc-performance-notes.git</span><span class="nv" style="color: #008080;"> </span><span class="s" style="color: #d14;">refs/notes/perf:refs/notes/perf</span><span class="nv" style="color: #008080;"> </span><span class="s" style="color: #d14;">||</span><span class="nv" style="color: #008080;"> </span><span class="s" style="color: #d14;">true"</span></span>
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<pre style="margin: 0;"> <span id="LC231" class="line" lang="yaml"> <span class="na" style="color: #008080;">after_script</span><span class="pi">:</span></span>
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<td class="diff-line-num new new_line" data-linenumber="232" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
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<pre style="margin: 0;">+<span id="LC232" class="line" lang="yaml"> <span class="pi">-</span> <span class="s" style="color: #d14;">cp -Rf $HOME/.cabal cabal-cache</span></span>
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<pre style="margin: 0;"> <span id="LC233" class="line" lang="yaml"> <span class="pi">-</span> <span class="s" style="color: #d14;">.gitlab/ci.sh clean</span></span>
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<pre style="margin: 0;"> <span id="LC234" class="line" lang="yaml"> <span class="na" style="color: #008080;">tags</span><span class="pi">:</span></span>
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<pre style="margin: 0;"> <span id="LC235" class="line" lang="yaml"> <span class="pi">-</span> <span class="s" style="color: #d14;">x86_64-linux</span></span>
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<pre style="margin: 0;">+<span id="LC262" class="line" lang="yaml"> <span class="pi">-</span> <span class="s" style="color: #d14;">.gitlab/ci.sh setup</span></span>
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<pre style="margin: 0;"> <span id="LC263" class="line" lang="yaml"> <span class="pi">-</span> <span class="s" style="color: #d14;">cabal update</span></span>
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<pre style="margin: 0;">-<span id="LC262" class="line" lang="yaml"> <span class="pi">-</span> <span class="s" style="color: #d14;">cd hadrian; cabal new-build --with-compiler=$GHC --project-file=ci.project; cd ..</span></span>
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<pre style="margin: 0;">+<span id="LC264" class="line" lang="yaml"> <span class="pi">-</span> <span class="s" style="color: #d14;">cd hadrian; cabal new-build -<span class="idiff left right">j`../mk/detect-cpu-count.sh` -</span>-with-compiler=$GHC --project-file=ci.project; cd ..</span></span>
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<pre style="margin: 0;"> <span id="LC265" class="line" lang="yaml"> <span class="pi">-</span> <span class="s" style="color: #d14;">git clean -xdf && git submodule foreach git clean -xdf</span></span>
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<pre style="margin: 0;">-<span id="LC264" class="line" lang="yaml"> <span class="pi">-</span> <span class="s" style="color: #d14;">.gitlab/ci.sh setup</span></span>
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<pre style="margin: 0;">-<span id="LC265" class="line" lang="yaml"> <span class="pi">-</span> <span class="s" style="color: #d14;">if [[ -d ./cabal-cache ]]; then cp -R ./.cabal-cache ~/.cabal-cache; fi</span></span>
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<pre style="margin: 0;"> <span id="LC266" class="line" lang="yaml"> <span class="pi">-</span> <span class="s" style="color: #d14;">./boot</span></span>
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<pre style="margin: 0;"> <span id="LC267" class="line" lang="yaml"> <span class="pi">-</span> <span class="s" style="color: #d14;">./configure $CONFIGURE_ARGS</span></span>
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<pre style="margin: 0;"> <span id="LC268" class="line" lang="yaml"> <span class="c1" style="color: #998; font-style: italic;"># Load ghc-in-ghci then immediately exit and check the modules loaded</span></span>
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<pre style="margin: 0;"> <span id="LC269" class="line" lang="yaml"> <span class="pi">-</span> <span class="s" style="color: #d14;">echo ":q" | hadrian/ghci -j`mk/detect-cpu-count.sh`| tail -n2 | grep "Ok,"</span></span>
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<pre style="margin: 0;">+<span id="LC270" class="line" lang="yaml"> <span class="na" style="color: #008080;">after_script</span><span class="pi">:</span></span>
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271
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<pre style="margin: 0;">+<span id="LC271" class="line" lang="yaml"> <span class="pi">-</span> <span class="s" style="color: #d14;">cp -Rf $HOME/.cabal cabal-cache</span></span>
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<pre style="margin: 0;"> <span id="LC272" class="line" lang="yaml"> <span class="na" style="color: #008080;">cache</span><span class="pi">:</span></span>
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<pre style="margin: 0;"> <span id="LC273" class="line" lang="yaml"> <span class="na" style="color: #008080;">key</span><span class="pi">:</span> <span class="s" style="color: #d14;">hadrian-ghci</span></span>
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<pre style="margin: 0;"> <span id="LC274" class="line" lang="yaml"> <span class="na" style="color: #008080;">paths</span><span class="pi">:</span></span>
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<li id="ab22d7ae4d245581b701367e386d7e886e416e76">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#ab22d7ae4d245581b701367e386d7e886e416e76"><strong>compiler/GHC/Core/Opt/Specialise.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2514,9 +2514,12 @@ mkCallUDs' env f args</td>
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<pre style="margin: 0;"> <span id="LC2514" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- we decide on a case by case basis if we want to specialise</span></span>
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2515
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<pre style="margin: 0;"> <span id="LC2515" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- on this argument; if so, SpecDict, if not UnspecArg</span></span>
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2516
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<pre style="margin: 0;"> <span id="LC2516" class="line" lang="haskell"> <span class="n" style="color: #333;">mk_spec_arg</span> <span class="n" style="color: #333;">arg</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Anon</span> <span class="kt" style="color: #458; font-weight: 600;">InvisArg</span> <span class="n" style="color: #333;">pred</span><span class="p">)</span></span>
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2517
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<pre style="margin: 0;">-<span id="LC2517" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">type_determines_value</span> <span class="p">(</span><span class="n" style="color: #333;">scaledThing</span> <span class="n" style="color: #333;">pred</span><span class="p">)</span></span>
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2518
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<pre style="margin: 0;">-<span id="LC2518" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">interestingDict</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">arg</span> <span class="c1" style="color: #998; font-style: italic;">-- Note [Interesting dictionary arguments]</span></span>
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<pre style="margin: 0;">+<span id="LC2517" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isIPLikePred</span> <span class="p">(</span><span class="n" style="color: #333;">scaledThing</span> <span class="n" style="color: #333;">pred</span><span class="p">))</span></span>
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2518
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<pre style="margin: 0;">+<span id="LC2518" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Type determines value]</span></span>
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2519
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<pre style="margin: 0;">+<span id="LC2519" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">interestingDict</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">arg</span></span>
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2520
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<pre style="margin: 0;">+<span id="LC2520" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Interesting dictionary arguments]</span></span>
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2519
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2521
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<pre style="margin: 0;"> <span id="LC2521" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">SpecDict</span> <span class="n" style="color: #333;">arg</span></span>
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2522
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<pre style="margin: 0;">+<span id="LC2522" class="line" lang="haskell"></span>
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2523
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<pre style="margin: 0;"> <span id="LC2523" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">UnspecArg</span></span>
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2521
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2524
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<pre style="margin: 0;"> <span id="LC2524" class="line" lang="haskell"></span>
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2525
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<pre style="margin: 0;"> <span id="LC2525" class="line" lang="haskell"> <span class="n" style="color: #333;">mk_spec_arg</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Anon</span> <span class="kt" style="color: #458; font-weight: 600;">VisArg</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2529,41 +2532,18 @@ mkCallUDs' env f args</td>
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<pre style="margin: 0;"> <span id="LC2532" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- in specImports</span></span>
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2530
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<pre style="margin: 0;"> <span id="LC2533" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Use 'realIdUnfolding' to ignore the loop-breaker flag!</span></span>
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2531
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<pre style="margin: 0;"> <span id="LC2534" class="line" lang="haskell"></span>
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2532
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<pre style="margin: 0;">-<span id="LC2532" class="line" lang="haskell"> <span class="n" style="color: #333;">type_determines_value</span> <span class="n" style="color: #333;">pred</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Type determines value]</span></span>
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2533
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<pre style="margin: 0;">-<span id="LC2533" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">classifyPredType</span> <span class="n" style="color: #333;">pred</span> <span class="kr" style="font-weight: 600;">of</span></span>
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2534
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<pre style="margin: 0;">-<span id="LC2534" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ClassPred</span> <span class="n" style="color: #333;">cls</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isIPClass</span> <span class="n" style="color: #333;">cls</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- Superclasses can't be IPs</span></span>
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2535
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<pre style="margin: 0;">-<span id="LC2535" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">EqPred</span> <span class="p">{}</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>
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2536
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<pre style="margin: 0;">-<span id="LC2536" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">IrredPred</span> <span class="p">{}</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="c1" style="color: #998; font-style: italic;">-- Things like (D []) where D is a</span></span>
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2537
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<pre style="margin: 0;">-<span id="LC2537" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Constraint-ranged family; #7785</span></span>
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2538
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<pre style="margin: 0;">-<span id="LC2538" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ForAllPred</span> <span class="p">{}</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>
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2539
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<pre style="margin: 0;">-<span id="LC2539" class="line" lang="haskell"></span>
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2540
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<pre style="margin: 0;">-<span id="LC2540" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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2541
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<pre style="margin: 0;">-<span id="LC2541" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Type determines value]</span></span>
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<pre style="margin: 0;">-<span id="LC2542" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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<pre style="margin: 0;">-<span id="LC2543" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Only specialise on non-IP *class* params, because these are the ones</span></span>
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<pre style="margin: 0;">-<span id="LC2544" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">whose *type* determines their *value*. In particular, with implicit</span></span>
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<pre style="margin: 0;">-<span id="LC2545" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">params, the type args *don't* say what the value of the implicit param</span></span>
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2546
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<pre style="margin: 0;">-<span id="LC2546" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">is! See #7101.</span></span>
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2535
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<pre style="margin: 0;">+<span id="LC2535" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Type determines value]</span></span>
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2536
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<pre style="margin: 0;">+<span id="LC2536" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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<pre style="margin: 0;">+<span id="LC2537" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Only specialise on non-impicit-parameter predicates, because these</span></span>
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<pre style="margin: 0;">+<span id="LC2538" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">are the ones whose *type* determines their *value*. In particular,</span></span>
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<pre style="margin: 0;">+<span id="LC2539" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">with implicit params, the type args *don't* say what the value of the</span></span>
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<pre style="margin: 0;">+<span id="LC2540" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">implicit param is! See #7101.</span></span>
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2547
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2541
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<pre style="margin: 0;"> <span id="LC2541" class="line" lang="haskell"></span>
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2548
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<pre style="margin: 0;"> <span id="LC2542" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">So we treat implicit params just like ordinary arguments for the</span></span>
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<pre style="margin: 0;"> <span id="LC2543" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">purposes of specialisation. Note that we still want to specialise</span></span>
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2550
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<pre style="margin: 0;"> <span id="LC2544" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">functions with implicit params if they have *other* dicts which are</span></span>
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2551
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<pre style="margin: 0;"> <span id="LC2545" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">class params; see #17930.</span></span>
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2552
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2546
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<pre style="margin: 0;"> <span id="LC2546" class="line" lang="haskell"></span>
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2553
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<pre style="margin: 0;">-<span id="LC2553" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">One apparent additional complexity involves type families. For</span></span>
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2554
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<pre style="margin: 0;">-<span id="LC2554" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">example, consider</span></span>
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2555
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<pre style="margin: 0;">-<span id="LC2555" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> type family D (v::*->*) :: Constraint</span></span>
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2556
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<pre style="margin: 0;">-<span id="LC2556" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> type instance D [] = ()</span></span>
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2557
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<pre style="margin: 0;">-<span id="LC2557" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> f :: D v => v Char -> Int</span></span>
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2558
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<pre style="margin: 0;">-<span id="LC2558" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">If we see a call (f "foo"), we'll pass a "dictionary"</span></span>
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2559
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<pre style="margin: 0;">-<span id="LC2559" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> () |> (g :: () ~ D [])</span></span>
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2560
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<pre style="margin: 0;">-<span id="LC2560" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and it's good to specialise f at this dictionary.</span></span>
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<pre style="margin: 0;">-<span id="LC2561" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC2562" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">So the question is: can an implicit parameter "hide inside" a</span></span>
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<pre style="margin: 0;">-<span id="LC2563" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">type-family constraint like (D a). Well, no. We don't allow</span></span>
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<pre style="margin: 0;">-<span id="LC2564" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> type instance D Maybe = ?x:Int</span></span>
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<pre style="margin: 0;">-<span id="LC2565" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Hence the IrredPred case in type_determines_value. See #7785.</span></span>
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<pre style="margin: 0;">-<span id="LC2566" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2547" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Interesting dictionary arguments]</span></span>
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<pre style="margin: 0;"> <span id="LC2548" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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<pre style="margin: 0;"> <span id="LC2549" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Consider this</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#0ca1508e5b0cedec2f19fe10e414597184209573"><strong>compiler/GHC/Core/Predicate.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -20,9 +20,10 @@ module GHC.Core.Predicate (</td>
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<pre style="margin: 0;"> <span id="LC20" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkClassPred</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isDictTy</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC21" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">isClassPred</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isEqPredClass</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isCTupleClass</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC22" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">getClassPredTys</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">getClassPredTys_maybe</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC23" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">classMethodTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">classMethodInstTy</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC24" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC25" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Implicit parameters</span></span>
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<pre style="margin: 0;">-<span id="LC25" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">isIP<span class="idiff left">Pred</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">isIPPred_maybe</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">isIPTyCon</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">isIPClass</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff right">hasIPPred</span></span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC26" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">isIP<span class="idiff left">LikePred</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">hasIPSuperClasses</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">isIPTyCon</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff right">isIPClass</span></span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC27" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC28" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Evidence variables</span></span>
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<pre style="margin: 0;"> <span id="LC29" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">DictId</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isEvVar</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isDictId</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -39,12 +40,10 @@ import GHC.Core.Multiplicity ( scaledThing )</td>
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<pre style="margin: 0;"> <span id="LC40" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC41" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Builtin.Names</span></span>
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<pre style="margin: 0;"> <span id="LC42" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC42" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Data.FastString</span></span>
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<pre style="margin: 0;"> <span id="LC43" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Outputable</span></span>
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<pre style="margin: 0;"> <span id="LC44" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Misc</span></span>
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<pre style="margin: 0;"> <span id="LC45" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Panic</span></span>
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<pre style="margin: 0;"> <span id="LC46" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC47" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Monad</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">guard</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC47" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC48" class="line" lang="haskell"><span class="cd">-- | A predicate in the solver. The solver tries to prove Wanted predicates</span></span>
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<pre style="margin: 0;"> <span id="LC49" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- from Given ones.</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -95,6 +94,26 @@ getClassPredTys_maybe ty = case splitTyConApp_maybe ty of</td>
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<pre style="margin: 0;"> <span id="LC94" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">tc</span><span class="p">,</span> <span class="n" style="color: #333;">tys</span><span class="p">)</span> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">clas</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tyConClass_maybe</span> <span class="n" style="color: #333;">tc</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">clas</span><span class="p">,</span> <span class="n" style="color: #333;">tys</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC95" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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<pre style="margin: 0;"> <span id="LC96" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC97" class="line" lang="haskell"><span class="n" style="color: #333;">classMethodTy</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>
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<pre style="margin: 0;">+<span id="LC98" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Takes a class selector op :: forall a. C a => meth_ty</span></span>
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<pre style="margin: 0;">+<span id="LC99" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- and returns the type of its method, meth_ty</span></span>
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<pre style="margin: 0;">+<span id="LC100" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- The selector can be a superclass selector, in which case</span></span>
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<pre style="margin: 0;">+<span id="LC101" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- you get back a superclass</span></span>
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<pre style="margin: 0;">+<span id="LC102" class="line" lang="haskell"><span class="n" style="color: #333;">classMethodTy</span> <span class="n" style="color: #333;">sel_id</span></span>
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<pre style="margin: 0;">+<span id="LC103" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">funResultTy</span> <span class="o" style="font-weight: 600;">$</span> <span class="c1" style="color: #998; font-style: italic;">-- meth_ty</span></span>
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<pre style="margin: 0;">+<span id="LC104" class="line" lang="haskell"> <span class="n" style="color: #333;">dropForAlls</span> <span class="o" style="font-weight: 600;">$</span> <span class="c1" style="color: #998; font-style: italic;">-- C a => meth_ty</span></span>
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<pre style="margin: 0;">+<span id="LC105" class="line" lang="haskell"> <span class="n" style="color: #333;">varType</span> <span class="n" style="color: #333;">sel_id</span> <span class="c1" style="color: #998; font-style: italic;">-- forall a. C n => meth_ty</span></span>
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<pre style="margin: 0;">+<span id="LC106" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC107" class="line" lang="haskell"><span class="n" style="color: #333;">classMethodInstTy</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>
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<pre style="margin: 0;">+<span id="LC108" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Takes a class selector op :: forall a b. C a b => meth_ty</span></span>
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<pre style="margin: 0;">+<span id="LC109" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- and the types [ty1, ty2] at which it is instantiated,</span></span>
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<pre style="margin: 0;">+<span id="LC110" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- returns the instantiated type of its method, meth_ty[t1/a,t2/b]</span></span>
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111
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<pre style="margin: 0;">+<span id="LC111" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- The selector can be a superclass selector, in which case</span></span>
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<pre style="margin: 0;">+<span id="LC112" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- you get back a superclass</span></span>
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<pre style="margin: 0;">+<span id="LC113" class="line" lang="haskell"><span class="n" style="color: #333;">classMethodInstTy</span> <span class="n" style="color: #333;">sel_id</span> <span class="n" style="color: #333;">arg_tys</span></span>
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<pre style="margin: 0;">+<span id="LC114" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">funResultTy</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">+<span id="LC115" class="line" lang="haskell"> <span class="n" style="color: #333;">piResultTys</span> <span class="p">(</span><span class="n" style="color: #333;">varType</span> <span class="n" style="color: #333;">sel_id</span><span class="p">)</span> <span class="n" style="color: #333;">arg_tys</span></span>
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<pre style="margin: 0;">+<span id="LC116" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC117" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- --------------------- Equality predicates ---------------------------------</span></span>
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<pre style="margin: 0;"> <span id="LC118" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC119" class="line" lang="haskell"><span class="cd">-- | A choice of equality relation. This is separate from the type 'Role'</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -170,7 +189,7 @@ isEqPredClass :: Class -> Bool</td>
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<pre style="margin: 0;"> <span id="LC189" class="line" lang="haskell"><span class="n" style="color: #333;">isEqPredClass</span> <span class="n" style="color: #333;">cls</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cls</span> <span class="p">`</span><span class="n" style="color: #333;">hasKey</span><span class="p">`</span> <span class="n" style="color: #333;">eqTyConKey</span></span>
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<pre style="margin: 0;"> <span id="LC190" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">cls</span> <span class="p">`</span><span class="n" style="color: #333;">hasKey</span><span class="p">`</span> <span class="n" style="color: #333;">heqTyConKey</span></span>
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<pre style="margin: 0;"> <span id="LC191" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC173" class="line" lang="haskell"><span class="n" style="color: #333;">isClassPred</span><span class="p">,</span> <span class="n" style="color: #333;">isEqPred</span><span class="p">,</span> <span class="n" style="color: #333;">isEqPrimPred</span><span class="p"><span class="idiff left">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">isIPPred</span></span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PredType</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;">+<span id="LC192" class="line" lang="haskell"><span class="n" style="color: #333;">isClassPred</span><span class="p">,</span> <span class="n" style="color: #333;">isEqPred</span><span class="p">,</span> <span class="n" style="color: #333;">isEqPrimPred</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PredType</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;"> <span id="LC193" class="line" lang="haskell"><span class="n" style="color: #333;">isClassPred</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">tyConAppTyCon_maybe</span> <span class="n" style="color: #333;">ty</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC194" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">tyCon</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isClassTyCon</span> <span class="n" style="color: #333;">tyCon</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>
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<pre style="margin: 0;"> <span id="LC195" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -186,9 +205,15 @@ isEqPred ty -- True of (a ~ b) and (a ~~ b)</td>
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<pre style="margin: 0;"> <span id="LC205" class="line" lang="haskell"><span class="n" style="color: #333;">isEqPrimPred</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isCoVarType</span> <span class="n" style="color: #333;">ty</span></span>
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<pre style="margin: 0;"> <span id="LC206" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- True of (a ~# b) (a ~R# b)</span></span>
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<pre style="margin: 0;"> <span id="LC207" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC189" class="line" lang="haskell"><span class="n" style="color: #333;">isIPPred</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">tyConAppTyCon_maybe</span> <span class="n" style="color: #333;">ty</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">-<span id="LC190" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">tc</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">isIPTyCon</span> <span class="n" style="color: #333;">tc</span></span>
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<pre style="margin: 0;">-<span id="LC191" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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<pre style="margin: 0;">+<span id="LC208" class="line" lang="haskell"><span class="n" style="color: #333;">isCTupleClass</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Class</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;">+<span id="LC209" class="line" lang="haskell"><span class="n" style="color: #333;">isCTupleClass</span> <span class="n" style="color: #333;">cls</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isTupleTyCon</span> <span class="p">(</span><span class="n" style="color: #333;">classTyCon</span> <span class="n" style="color: #333;">cls</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC210" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC211" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC212" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- *********************************************************************</span></span>
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<pre style="margin: 0;">+<span id="LC213" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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<pre style="margin: 0;">+<span id="LC214" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Implicit parameters</span></span>
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<pre style="margin: 0;">+<span id="LC215" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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<pre style="margin: 0;">+<span id="LC216" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">********************************************************************* -}</span></span>
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<pre style="margin: 0;"> <span id="LC217" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC218" class="line" lang="haskell"><span class="n" style="color: #333;">isIPTyCon</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TyCon</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;"> <span id="LC219" class="line" lang="haskell"><span class="n" style="color: #333;">isIPTyCon</span> <span class="n" style="color: #333;">tc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tc</span> <span class="p">`</span><span class="n" style="color: #333;">hasKey</span><span class="p">`</span> <span class="n" style="color: #333;">ipClassKey</span></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="222" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -197,31 +222,103 @@ isIPTyCon tc = tc `hasKey` ipClassKey</td>
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<pre style="margin: 0;"> <span id="LC222" class="line" lang="haskell"><span class="n" style="color: #333;">isIPClass</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Class</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;"> <span id="LC223" class="line" lang="haskell"><span class="n" style="color: #333;">isIPClass</span> <span class="n" style="color: #333;">cls</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cls</span> <span class="p">`</span><span class="n" style="color: #333;">hasKey</span><span class="p">`</span> <span class="n" style="color: #333;">ipClassKey</span></span>
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<pre style="margin: 0;"> <span id="LC224" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC200" class="line" lang="haskell"><span class="n" style="color: #333;">isCTupleClass</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Class</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;">-<span id="LC201" class="line" lang="haskell"><span class="n" style="color: #333;">isCTupleClass</span> <span class="n" style="color: #333;">cls</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isTupleTyCon</span> <span class="p">(</span><span class="n" style="color: #333;">classTyCon</span> <span class="n" style="color: #333;">cls</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC225" class="line" lang="haskell"><span class="n" style="color: #333;">isIPLikePred</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;">+<span id="LC226" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Local implicit parameters]</span></span>
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<pre style="margin: 0;">+<span id="LC227" class="line" lang="haskell"><span class="n" style="color: #333;">isIPLikePred</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">is_ip_like_pred</span> <span class="n" style="color: #333;">initIPRecTc</span></span>
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<pre style="margin: 0;"> <span id="LC228" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC203" class="line" lang="haskell"><span class="n" style="color: #333;">isIPPred_maybe</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">FastString</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC204" class="line" lang="haskell"><span class="n" style="color: #333;">isIPPred_maybe</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">-<span id="LC205" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="p">(</span><span class="n" style="color: #333;">tc</span><span class="p">,[</span><span class="n" style="color: #333;">t1</span><span class="p">,</span><span class="n" style="color: #333;">t2</span><span class="p">])</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">splitTyConApp_maybe</span> <span class="n" style="color: #333;">ty</span></span>
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<pre style="margin: 0;">-<span id="LC206" class="line" lang="haskell"> <span class="n" style="color: #333;">guard</span> <span class="p">(</span><span class="n" style="color: #333;">isIPTyCon</span> <span class="n" style="color: #333;">tc</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC207" class="line" lang="haskell"> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">isStrLitTy</span> <span class="n" style="color: #333;">t1</span></span>
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<pre style="margin: 0;">-<span id="LC208" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">x</span><span class="p">,</span><span class="n" style="color: #333;">t2</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC209" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC210" class="line" lang="haskell"><span class="n" style="color: #333;">hasIPPred</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PredType</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;">-<span id="LC211" class="line" lang="haskell"><span class="n" style="color: #333;">hasIPPred</span> <span class="n" style="color: #333;">pred</span></span>
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<pre style="margin: 0;">-<span id="LC212" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">classifyPredType</span> <span class="n" style="color: #333;">pred</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">-<span id="LC213" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ClassPred</span> <span class="n" style="color: #333;">cls</span> <span class="n" style="color: #333;">tys</span></span>
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<pre style="margin: 0;">-<span id="LC214" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isIPClass</span> <span class="n" style="color: #333;">cls</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>
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<pre style="margin: 0;">-<span id="LC215" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isCTupleClass</span> <span class="n" style="color: #333;">cls</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">any</span> <span class="n" style="color: #333;">hasIPPred</span> <span class="n" style="color: #333;">tys</span></span>
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<pre style="margin: 0;">-<span id="LC216" class="line" lang="haskell"> <span class="n" style="color: #333;">_other</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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217
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229
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<pre style="margin: 0;"> <span id="LC229" class="line" lang="haskell"></span>
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218
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<pre style="margin: 0;">-<span id="LC218" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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219
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<pre style="margin: 0;">-<span id="LC219" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
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230
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<pre style="margin: 0;">+<span id="LC230" class="line" lang="haskell"><span class="n" style="color: #333;">is_ip_like_pred</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">RecTcChecker</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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231
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<pre style="margin: 0;">+<span id="LC231" class="line" lang="haskell"><span class="n" style="color: #333;">is_ip_like_pred</span> <span class="n" style="color: #333;">rec_clss</span> <span class="n" style="color: #333;">ty</span></span>
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232
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<pre style="margin: 0;">+<span id="LC232" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">tc</span><span class="p">,</span> <span class="n" style="color: #333;">tys</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">splitTyConApp_maybe</span> <span class="n" style="color: #333;">ty</span></span>
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233
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<pre style="margin: 0;">+<span id="LC233" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">rec_clss'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">isTupleTyCon</span> <span class="n" style="color: #333;">tc</span> <span class="c1" style="color: #998; font-style: italic;">-- Tuples never cause recursion</span></span>
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234
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<pre style="margin: 0;">+<span id="LC234" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">then</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">rec_clss</span></span>
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235
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<pre style="margin: 0;">+<span id="LC235" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span> <span class="n" style="color: #333;">checkRecTc</span> <span class="n" style="color: #333;">rec_clss</span> <span class="n" style="color: #333;">tc</span></span>
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236
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<pre style="margin: 0;">+<span id="LC236" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">cls</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tyConClass_maybe</span> <span class="n" style="color: #333;">tc</span></span>
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237
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<pre style="margin: 0;">+<span id="LC237" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isIPClass</span> <span class="n" style="color: #333;">cls</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">has_ip_super_classes</span> <span class="n" style="color: #333;">rec_clss'</span> <span class="n" style="color: #333;">cls</span> <span class="n" style="color: #333;">tys</span></span>
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<pre style="margin: 0;">+<span id="LC238" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC239" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>
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240
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<pre style="margin: 0;">+<span id="LC240" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="c1" style="color: #998; font-style: italic;">-- Includes things like (D []) where D is</span></span>
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<pre style="margin: 0;">+<span id="LC241" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- a Constraint-ranged family; #7785</span></span>
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242
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<pre style="margin: 0;">+<span id="LC242" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC243" class="line" lang="haskell"><span class="n" style="color: #333;">hasIPSuperClasses</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Class</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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244
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<pre style="margin: 0;">+<span id="LC244" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Local implicit parameters]</span></span>
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<pre style="margin: 0;">+<span id="LC245" class="line" lang="haskell"><span class="n" style="color: #333;">hasIPSuperClasses</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">has_ip_super_classes</span> <span class="n" style="color: #333;">initIPRecTc</span></span>
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246
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<pre style="margin: 0;">+<span id="LC246" class="line" lang="haskell"></span>
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247
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<pre style="margin: 0;">+<span id="LC247" class="line" lang="haskell"><span class="n" style="color: #333;">has_ip_super_classes</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">RecTcChecker</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Class</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;">+<span id="LC248" class="line" lang="haskell"><span class="n" style="color: #333;">has_ip_super_classes</span> <span class="n" style="color: #333;">rec_clss</span> <span class="n" style="color: #333;">cls</span> <span class="n" style="color: #333;">tys</span></span>
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249
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<pre style="margin: 0;">+<span id="LC249" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">any</span> <span class="n" style="color: #333;">ip_ish</span> <span class="p">(</span><span class="n" style="color: #333;">classSCSelIds</span> <span class="n" style="color: #333;">cls</span><span class="p">)</span></span>
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250
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<pre style="margin: 0;">+<span id="LC250" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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251
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<pre style="margin: 0;">+<span id="LC251" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Check that the type of a superclass determines its value</span></span>
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<pre style="margin: 0;">+<span id="LC252" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- sc_sel_id :: forall a b. C a b -> <superclass type></span></span>
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<pre style="margin: 0;">+<span id="LC253" class="line" lang="haskell"> <span class="n" style="color: #333;">ip_ish</span> <span class="n" style="color: #333;">sc_sel_id</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">is_ip_like_pred</span> <span class="n" style="color: #333;">rec_clss</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">+<span id="LC254" class="line" lang="haskell"> <span class="n" style="color: #333;">classMethodInstTy</span> <span class="n" style="color: #333;">sc_sel_id</span> <span class="n" style="color: #333;">tys</span></span>
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<pre style="margin: 0;">+<span id="LC255" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC256" class="line" lang="haskell"><span class="n" style="color: #333;">initIPRecTc</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">RecTcChecker</span></span>
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<pre style="margin: 0;">+<span id="LC257" class="line" lang="haskell"><span class="n" style="color: #333;">initIPRecTc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">setRecTcMaxBound</span> <span class="mi" style="color: #099;">1</span> <span class="n" style="color: #333;">initRecTc</span></span>
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<pre style="margin: 0;">+<span id="LC258" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC259" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Local implicit parameters]</span></span>
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<pre style="margin: 0;">+<span id="LC260" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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<pre style="margin: 0;">+<span id="LC261" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The function isIPLikePred tells if this predicate, or any of its</span></span>
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<pre style="margin: 0;">+<span id="LC262" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">superclasses, is an implicit parameter.</span></span>
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<pre style="margin: 0;">+<span id="LC263" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC264" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Why are implicit parameters special? Unlike normal classes, we can</span></span>
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<pre style="margin: 0;">+<span id="LC265" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">have local instances for implicit parameters, in the form of</span></span>
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<pre style="margin: 0;">+<span id="LC266" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> let ?x = True in ...</span></span>
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<pre style="margin: 0;">+<span id="LC267" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">So in various places we must be careful not to assume that any value</span></span>
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<pre style="margin: 0;">+<span id="LC268" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">of the right type will do; we must carefully look for the innermost binding.</span></span>
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<pre style="margin: 0;">+<span id="LC269" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">So isIPLikePred checks whether this is an implicit parameter, or has</span></span>
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<pre style="margin: 0;">+<span id="LC270" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">a superclass that is an implicit parameter.</span></span>
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271
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<pre style="margin: 0;">+<span id="LC271" class="line" lang="haskell"></span>
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272
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<pre style="margin: 0;">+<span id="LC272" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Several wrinkles</span></span>
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<pre style="margin: 0;">+<span id="LC273" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC274" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* We must be careful with superclasses, as #18649 showed. Haskell</span></span>
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275
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<pre style="margin: 0;">+<span id="LC275" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> doesn't allow an implicit parameter as a superclass</span></span>
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<pre style="margin: 0;">+<span id="LC276" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> class (?x::a) => C a where ...</span></span>
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277
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<pre style="margin: 0;">+<span id="LC277" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> but with a constraint tuple we might have</span></span>
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<pre style="margin: 0;">+<span id="LC278" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> (% Eq a, ?x::Int %)</span></span>
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279
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<pre style="margin: 0;">+<span id="LC279" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> and /its/ superclasses, namely (Eq a) and (?x::Int), /do/ include an</span></span>
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280
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<pre style="margin: 0;">+<span id="LC280" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> implicit parameter.</span></span>
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<pre style="margin: 0;">+<span id="LC281" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC282" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> With ConstraintKinds this can apply to /any/ class, e.g.</span></span>
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<pre style="margin: 0;">+<span id="LC283" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> class sc => C sc where ...</span></span>
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<pre style="margin: 0;">+<span id="LC284" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Then (C (?x::Int)) has (?x::Int) as a superclass. So we must</span></span>
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<pre style="margin: 0;">+<span id="LC285" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> instantiate and check each superclass, one by one, in</span></span>
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<pre style="margin: 0;">+<span id="LC286" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> hasIPSuperClasses.</span></span>
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<pre style="margin: 0;">+<span id="LC287" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC288" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* With -XRecursiveSuperClasses, the superclass hunt can go on forever,</span></span>
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<pre style="margin: 0;">+<span id="LC289" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> so we need a RecTcChecker to cut it off.</span></span>
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<pre style="margin: 0;">+<span id="LC290" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC291" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* Another apparent additional complexity involves type families. For</span></span>
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292
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<pre style="margin: 0;">+<span id="LC292" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> example, consider</span></span>
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<pre style="margin: 0;">+<span id="LC293" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> type family D (v::*->*) :: Constraint</span></span>
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294
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<pre style="margin: 0;">+<span id="LC294" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> type instance D [] = ()</span></span>
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<pre style="margin: 0;">+<span id="LC295" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> f :: D v => v Char -> Int</span></span>
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<pre style="margin: 0;">+<span id="LC296" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> If we see a call (f "foo"), we'll pass a "dictionary"</span></span>
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<pre style="margin: 0;">+<span id="LC297" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> () |> (g :: () ~ D [])</span></span>
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<pre style="margin: 0;">+<span id="LC298" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> and it's good to specialise f at this dictionary.</span></span>
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<pre style="margin: 0;">+<span id="LC299" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC300" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">So the question is: can an implicit parameter "hide inside" a</span></span>
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<pre style="margin: 0;">+<span id="LC301" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">type-family constraint like (D a). Well, no. We don't allow</span></span>
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<pre style="margin: 0;">+<span id="LC302" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> type instance D Maybe = ?x:Int</span></span>
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<pre style="margin: 0;">+<span id="LC303" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Hence the umbrella 'otherwise' case in is_ip_like_pred. See #7785.</span></span>
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<pre style="margin: 0;">+<span id="LC304" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC305" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Small worries (Sept 20):</span></span>
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<pre style="margin: 0;">+<span id="LC306" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* I don't see what stops us having that 'type instance'. Indeed I</span></span>
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<pre style="margin: 0;">+<span id="LC307" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> think nothing does.</span></span>
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<pre style="margin: 0;">+<span id="LC308" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* I'm a little concerned about type variables; such a variable might</span></span>
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<pre style="margin: 0;">+<span id="LC309" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> be instantiated to an implicit parameter. I don't think this</span></span>
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<pre style="margin: 0;">+<span id="LC310" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> matters in the cases for which isIPLikePred is used, and it's pretty</span></span>
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<pre style="margin: 0;">+<span id="LC311" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> obscure anyway.</span></span>
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<pre style="margin: 0;">+<span id="LC312" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* The superclass hunt stops when it encounters the same class again,</span></span>
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<pre style="margin: 0;">+<span id="LC313" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> but in principle we could have the same class, differently instantiated,</span></span>
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<pre style="margin: 0;">+<span id="LC314" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> and the second time it could have an implicit parameter</span></span>
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<pre style="margin: 0;">+<span id="LC315" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">I'm going to treat these as problems for another day. They are all exotic. -}</span></span>
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<pre style="margin: 0;">+<span id="LC316" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC317" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- *********************************************************************</span></span>
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<pre style="margin: 0;"> <span id="LC318" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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<pre style="margin: 0;"> <span id="LC319" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Evidence variables</span></span>
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<pre style="margin: 0;"> <span id="LC320" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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<pre style="margin: 0;">-<span id="LC223" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
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<pre style="margin: 0;">-<span id="LC224" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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<pre style="margin: 0;">+<span id="LC321" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">********************************************************************* -}</span></span>
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<pre style="margin: 0;"> <span id="LC322" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC323" class="line" lang="haskell"><span class="n" style="color: #333;">isEvVar</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;"> <span id="LC324" class="line" lang="haskell"><span class="n" style="color: #333;">isEvVar</span> <span class="n" style="color: #333;">var</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isEvVarType</span> <span class="p">(</span><span class="n" style="color: #333;">varType</span> <span class="n" style="color: #333;">var</span><span class="p">)</span></span>
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<li id="75bfcd03f3ba9315d33104fcb0424c6bfeb4e334">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#75bfcd03f3ba9315d33104fcb0424c6bfeb4e334"><strong>compiler/GHC/Hs/Decls.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -25,7 +25,8 @@</td>
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<pre style="margin: 0;"> <span id="LC25" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">GHC.Hs.Decls</span> <span class="p">(</span></span>
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<pre style="margin: 0;"> <span id="LC26" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- * Toplevel declarations</span></span>
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<pre style="margin: 0;"> <span id="LC27" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">HsDecl</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">LHsDecl</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">HsDataDefn</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">HsDeriving</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">LHsFunDep</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC28" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">HsDerivingClause</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">LHsDerivingClause</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">NewOrData</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="nf" style="color: #900; font-weight: 600;">newOrDataToFlavour</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC28" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">HsDerivingClause</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">LHsDerivingClause</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">DerivClauseTys</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">LDerivClauseTys</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC29" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">NewOrData</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="nf" style="color: #900; font-weight: 600;">newOrDataToFlavour</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC30" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">StandaloneKindSig</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">LStandaloneKindSig</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">standaloneKindSigName</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC31" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC32" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ** Class or type declarations</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1321,15 +1322,8 @@ data HsDerivingClause pass</td>
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<pre style="margin: 0;"> <span id="LC1322" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">deriv_clause_strategy</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LDerivStrategy</span> <span class="n" style="color: #333;">pass</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC1323" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ^ The user-specified strategy (if any) to use when deriving</span></span>
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<pre style="margin: 0;"> <span id="LC1324" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- 'deriv_clause_tys'.</span></span>
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<pre style="margin: 0;">-<span id="LC1324" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">deriv_clause_tys</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">XRec</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">pass</span></span><span class="idiff"> </span><span class="p"><span class="idiff">[</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">LHsSigType</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">pass</span></span><span class="p"><span class="idiff right">]</span></span></span>
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<pre style="margin: 0;">+<span id="LC1325" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">deriv_clause_tys</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">LDerivClauseTys</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">pass</span></span></span>
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1325
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1326
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<pre style="margin: 0;"> <span id="LC1326" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ^ The types to derive.</span></span>
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<pre style="margin: 0;">-<span id="LC1326" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">--</span></span>
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1327
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<pre style="margin: 0;">-<span id="LC1327" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- It uses 'LHsSigType's because, with @-XGeneralizedNewtypeDeriving@,</span></span>
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1328
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<pre style="margin: 0;">-<span id="LC1328" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- we can mention type variables that aren't bound by the datatype, e.g.</span></span>
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1329
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<pre style="margin: 0;">-<span id="LC1329" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">--</span></span>
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1330
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<pre style="margin: 0;">-<span id="LC1330" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- > data T b = ... deriving (C [a])</span></span>
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1331
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<pre style="margin: 0;">-<span id="LC1331" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">--</span></span>
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1332
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<pre style="margin: 0;">-<span id="LC1332" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- should produce a derived instance for @C [a] (T b)@.</span></span>
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1333
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<pre style="margin: 0;"> <span id="LC1327" class="line" lang="haskell"> <span class="p">}</span></span>
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1334
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<pre style="margin: 0;"> <span id="LC1328" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">XHsDerivingClause</span> <span class="o" style="font-weight: 600;">!</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XXHsDerivingClause</span> <span class="n" style="color: #333;">pass</span><span class="p">)</span></span>
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1329
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<pre style="margin: 0;"> <span id="LC1329" class="line" lang="haskell"></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1342,16 +1336,9 @@ instance OutputableBndrId p</td>
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<pre style="margin: 0;"> <span id="LC1336" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">deriv_clause_tys</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">dct</span> <span class="p">})</span></span>
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<pre style="margin: 0;"> <span id="LC1337" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">hsep</span> <span class="p">[</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"deriving"</span></span>
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<pre style="margin: 0;"> <span id="LC1338" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">pp_strat_before</span></span>
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1345
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<pre style="margin: 0;">-<span id="LC1345" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">pp<span class="idiff left right">_dct</span></span> <span class="n" style="color: #333;">dct</span></span>
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1339
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<pre style="margin: 0;">+<span id="LC1339" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">pp<span class="idiff left right">r</span></span> <span class="n" style="color: #333;">dct</span></span>
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1346
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<pre style="margin: 0;"> <span id="LC1340" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">pp_strat_after</span> <span class="p">]</span></span>
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1347
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<pre style="margin: 0;"> <span id="LC1341" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1348
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<pre style="margin: 0;">-<span id="LC1348" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- This complexity is to distinguish between</span></span>
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1349
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<pre style="margin: 0;">-<span id="LC1349" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- deriving Show</span></span>
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<pre style="margin: 0;">-<span id="LC1350" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- deriving (Show)</span></span>
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<pre style="margin: 0;">-<span id="LC1351" class="line" lang="haskell"> <span class="n" style="color: #333;">pp_dct</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HsIB</span> <span class="p">{</span> <span class="n" style="color: #333;">hsib_body</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ty</span> <span class="p">}]</span></span>
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1352
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<pre style="margin: 0;">-<span id="LC1352" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">parenthesizeHsType</span> <span class="n" style="color: #333;">appPrec</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span></span>
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1353
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<pre style="margin: 0;">-<span id="LC1353" class="line" lang="haskell"> <span class="n" style="color: #333;">pp_dct</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">parens</span> <span class="p">(</span><span class="n" style="color: #333;">interpp'SP</span> <span class="n" style="color: #333;">dct</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC1354" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1342" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- @via@ is unique in that in comes /after/ the class being derived,</span></span>
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1356
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1343
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<pre style="margin: 0;"> <span id="LC1343" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- so we must special-case it.</span></span>
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<pre style="margin: 0;"> <span id="LC1344" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">pp_strat_before</span><span class="p">,</span> <span class="n" style="color: #333;">pp_strat_after</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1359,6 +1346,43 @@ instance OutputableBndrId p</td>
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1346
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<pre style="margin: 0;"> <span id="LC1346" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">via</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">ViaStrategy</span><span class="p">{})</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">empty</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">via</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC1347" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">ppDerivStrategy</span> <span class="n" style="color: #333;">dcs</span><span class="p">,</span> <span class="n" style="color: #333;">empty</span><span class="p">)</span></span>
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1361
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<pre style="margin: 0;"> <span id="LC1348" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1349" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">LDerivClauseTys</span> <span class="n" style="color: #333;">pass</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">XRec</span> <span class="n" style="color: #333;">pass</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DerivClauseTys</span> <span class="n" style="color: #333;">pass</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC1350" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1351" class="line" lang="haskell"><span class="cd">-- | The types mentioned in a single @deriving@ clause. This can come in two</span></span>
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<pre style="margin: 0;">+<span id="LC1352" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- forms, 'DctSingle' or 'DctMulti', depending on whether the types are</span></span>
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<pre style="margin: 0;">+<span id="LC1353" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- surrounded by enclosing parentheses or not. These parentheses are</span></span>
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<pre style="margin: 0;">+<span id="LC1354" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- semantically differnt than 'HsParTy'. For example, @deriving ()@ means</span></span>
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<pre style="margin: 0;">+<span id="LC1355" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- \"derive zero classes\" rather than \"derive an instance of the 0-tuple\".</span></span>
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1356
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<pre style="margin: 0;">+<span id="LC1356" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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<pre style="margin: 0;">+<span id="LC1357" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'DerivClauseTys' use 'LHsSigType' because @deriving@ clauses can mention</span></span>
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<pre style="margin: 0;">+<span id="LC1358" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- type variables that aren't bound by the datatype, e.g.</span></span>
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1359
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<pre style="margin: 0;">+<span id="LC1359" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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1360
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<pre style="margin: 0;">+<span id="LC1360" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- > data T b = ... deriving (C [a])</span></span>
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1361
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<pre style="margin: 0;">+<span id="LC1361" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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1362
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<pre style="margin: 0;">+<span id="LC1362" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- should produce a derived instance for @C [a] (T b)@.</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1363" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1363
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<pre style="margin: 0;">+<span id="LC1363" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">DerivClauseTys</span> <span class="n" style="color: #333;">pass</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1364" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1364
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<pre style="margin: 0;">+<span id="LC1364" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="c1" style="color: #998; font-style: italic;">-- | A @deriving@ clause with a single type. Moreover, that type can only</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1365" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1365
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<pre style="margin: 0;">+<span id="LC1365" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- be a type constructor without any arguments.</span></span>
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1366
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<pre style="margin: 0;">+<span id="LC1366" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">--</span></span>
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1367
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<pre style="margin: 0;">+<span id="LC1367" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Example: @deriving Eq@</span></span>
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1368
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<pre style="margin: 0;">+<span id="LC1368" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">DctSingle</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XDctSingle</span> <span class="n" style="color: #333;">pass</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LHsSigType</span> <span class="n" style="color: #333;">pass</span><span class="p">)</span></span>
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1369
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<pre style="margin: 0;">+<span id="LC1369" class="line" lang="haskell"></span>
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1370
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<pre style="margin: 0;">+<span id="LC1370" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- | A @deriving@ clause with a comma-separated list of types, surrounded</span></span>
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1371
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<pre style="margin: 0;">+<span id="LC1371" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- by enclosing parentheses.</span></span>
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1372
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<pre style="margin: 0;">+<span id="LC1372" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">--</span></span>
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1373
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<pre style="margin: 0;">+<span id="LC1373" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Example: @deriving (Eq, C a)@</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1374" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1374
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<pre style="margin: 0;">+<span id="LC1374" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">DctMulti</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XDctMulti</span> <span class="n" style="color: #333;">pass</span><span class="p">)</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">LHsSigType</span> <span class="n" style="color: #333;">pass</span><span class="p">]</span></span>
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1375
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<pre style="margin: 0;">+<span id="LC1375" class="line" lang="haskell"></span>
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<td class="diff-line-num new new_line" data-linenumber="1376" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1376
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<pre style="margin: 0;">+<span id="LC1376" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">XDerivClauseTys</span> <span class="o" style="font-weight: 600;">!</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XXDerivClauseTys</span> <span class="n" style="color: #333;">pass</span><span class="p">)</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1377
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<pre style="margin: 0;">+<span id="LC1377" class="line" lang="haskell"></span>
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1378
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<pre style="margin: 0;">+<span id="LC1378" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">XDctSingle</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">NoExtField</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1379" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1379
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<pre style="margin: 0;">+<span id="LC1379" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">XDctMulti</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">NoExtField</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1380" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1380
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<pre style="margin: 0;">+<span id="LC1380" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">XXDerivClauseTys</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">NoExtCon</span></span>
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<pre style="margin: 0;">+<span id="LC1381" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1382" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">OutputableBndrId</span> <span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DerivClauseTys</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="n" style="color: #333;">p</span><span class="p">))</span> <span class="kr" style="font-weight: 600;">where</span></span>
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1383
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<pre style="margin: 0;">+<span id="LC1383" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DctSingle</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ty</span></span>
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1384
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<pre style="margin: 0;">+<span id="LC1384" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DctMulti</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">tys</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">parens</span> <span class="p">(</span><span class="n" style="color: #333;">interpp'SP</span> <span class="n" style="color: #333;">tys</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC1385" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1386" class="line" lang="haskell"><span class="cd">-- | Located Standalone Kind Signature</span></span>
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<pre style="margin: 0;"> <span id="LC1387" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">LStandaloneKindSig</span> <span class="n" style="color: #333;">pass</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">XRec</span> <span class="n" style="color: #333;">pass</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">StandaloneKindSig</span> <span class="n" style="color: #333;">pass</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC1388" class="line" lang="haskell"></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#576dff4e64fa03683ffc5dcdd58284acdd70bc8e"><strong>compiler/GHC/Hs/Extension.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -446,6 +446,12 @@ type family XXHsDataDefn x</td>
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<pre style="margin: 0;"> <span id="LC446" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="n" style="color: #333;">family</span> <span class="kt" style="color: #458; font-weight: 600;">XCHsDerivingClause</span> <span class="n" style="color: #333;">x</span></span>
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<pre style="margin: 0;"> <span id="LC447" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="n" style="color: #333;">family</span> <span class="kt" style="color: #458; font-weight: 600;">XXHsDerivingClause</span> <span class="n" style="color: #333;">x</span></span>
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<pre style="margin: 0;"> <span id="LC448" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC449" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- -------------------------------------</span></span>
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<pre style="margin: 0;">+<span id="LC450" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- DerivClauseTys type families</span></span>
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<pre style="margin: 0;">+<span id="LC451" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="n" style="color: #333;">family</span> <span class="kt" style="color: #458; font-weight: 600;">XDctSingle</span> <span class="n" style="color: #333;">x</span></span>
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<pre style="margin: 0;">+<span id="LC452" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="n" style="color: #333;">family</span> <span class="kt" style="color: #458; font-weight: 600;">XDctMulti</span> <span class="n" style="color: #333;">x</span></span>
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<pre style="margin: 0;">+<span id="LC453" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="n" style="color: #333;">family</span> <span class="kt" style="color: #458; font-weight: 600;">XXDerivClauseTys</span> <span class="n" style="color: #333;">x</span></span>
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<pre style="margin: 0;">+<span id="LC454" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC455" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- -------------------------------------</span></span>
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<pre style="margin: 0;"> <span id="LC456" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ConDecl type families</span></span>
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<pre style="margin: 0;"> <span id="LC457" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="n" style="color: #333;">family</span> <span class="kt" style="color: #458; font-weight: 600;">XConDeclGADT</span> <span class="n" style="color: #333;">x</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#9f00edfedb0f969865b049a78de3866545b4a60b"><strong>compiler/GHC/Hs/Instances.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -163,6 +163,11 @@ deriving instance Data (HsDerivingClause GhcPs)</td>
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<pre style="margin: 0;"> <span id="LC163" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">deriving</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Data</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsDerivingClause</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC164" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">deriving</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Data</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsDerivingClause</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC165" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC166" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- deriving instance DataIdLR p p => Data (DerivClauseTys p)</span></span>
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<pre style="margin: 0;">+<span id="LC167" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">deriving</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Data</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DerivClauseTys</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC168" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">deriving</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Data</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DerivClauseTys</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC169" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">deriving</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Data</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DerivClauseTys</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC170" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC171" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- deriving instance (DataIdLR p p) => Data (ConDecl p)</span></span>
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<pre style="margin: 0;"> <span id="LC172" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">deriving</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Data</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ConDecl</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC173" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">deriving</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Data</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ConDecl</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span><span class="p">)</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#ea46b374e004d4416e29a563ee063542f98e48c5"><strong>compiler/GHC/HsToCore/Docs.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -193,13 +193,19 @@ subordinates instMap decl = case decl of</td>
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<pre style="margin: 0;"> <span id="LC193" class="line" lang="haskell"> <span class="p">,</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ConDeclField</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">ns</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">doc</span><span class="p">))</span> <span class="o" style="font-weight: 600;"><-</span> <span class="p">(</span><span class="n" style="color: #333;">unLoc</span> <span class="n" style="color: #333;">flds</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC194" class="line" lang="haskell"> <span class="p">,</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">n</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">ns</span> <span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC195" class="line" lang="haskell"> <span class="n" style="color: #333;">derivs</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">[</span> <span class="p">(</span><span class="n" style="color: #333;">instName</span><span class="p">,</span> <span class="p">[</span><span class="n" style="color: #333;">unLoc</span> <span class="n" style="color: #333;">doc</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">M</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">empty</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC196" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="n" style="color: #333;">l</span><span class="p">,</span> <span class="n" style="color: #333;">doc</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;"><span class="idiff left">mapMaybe</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">extract_deriv_ty</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">hsib_body</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right">$</span></span></span>
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197
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<pre style="margin: 0;">-<span id="LC197" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left">concatMap</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">unLoc</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right">.</span></span> <span class="n" style="color: #333;">deriv_clause_tys</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">unLoc</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">+<span id="LC196" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="n" style="color: #333;">l</span><span class="p">,</span> <span class="n" style="color: #333;">doc</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;"><span class="idiff left">concatMap</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">extract_deriv_clause_tys</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right">.</span></span></span>
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<pre style="margin: 0;">+<span id="LC197" class="line" lang="haskell"> <span class="idiff left right"> </span> <span class="n" style="color: #333;">deriv_clause_tys</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">unLoc</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;"> <span id="LC198" class="line" lang="haskell"> <span class="n" style="color: #333;">unLoc</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">dd_derivs</span> <span class="n" style="color: #333;">dd</span></span>
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<pre style="margin: 0;"> <span id="LC199" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">instName</span> <span class="o" style="font-weight: 600;"><-</span> <span class="p">[</span><span class="n" style="color: #333;">lookupSrcSpan</span> <span class="n" style="color: #333;">l</span> <span class="n" style="color: #333;">instMap</span><span class="p">]</span> <span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC200" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC201" class="line" lang="haskell"> <span class="n" style="color: #333;">extract_deriv_ty</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LHsType</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SrcSpan</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">LHsDocString</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC202" class="line" lang="haskell"> <span class="n" style="color: #333;">extract_deriv_ty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">+<span id="LC201" class="line" lang="haskell"> <span class="n" style="color: #333;">extract_deriv_clause_tys</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LDerivClauseTys</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">SrcSpan</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">LHsDocString</span><span class="p">)]</span></span>
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<pre style="margin: 0;">+<span id="LC202" class="line" lang="haskell"> <span class="n" style="color: #333;">extract_deriv_clause_tys</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">dct</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">+<span id="LC203" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">dct</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">+<span id="LC204" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">DctSingle</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">maybeToList</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">extract_deriv_ty</span> <span class="n" style="color: #333;">ty</span></span>
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<pre style="margin: 0;">+<span id="LC205" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">DctMulti</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">tys</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">mapMaybe</span> <span class="n" style="color: #333;">extract_deriv_ty</span> <span class="n" style="color: #333;">tys</span></span>
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<pre style="margin: 0;">+<span id="LC206" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC207" class="line" lang="haskell"> <span class="n" style="color: #333;">extract_deriv_ty</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LHsSigType</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SrcSpan</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">LHsDocString</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC208" class="line" lang="haskell"> <span class="n" style="color: #333;">extract_deriv_ty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsIB</span><span class="p">{</span><span class="n" style="color: #333;">hsib_body</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="n" style="color: #333;">ty</span><span class="p">})</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;"> <span id="LC209" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">ty</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC210" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- deriving (forall a. C a {- ^ Doc comment -})</span></span>
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<pre style="margin: 0;"> <span id="LC211" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">HsForAllTy</span><span class="p">{</span> <span class="n" style="color: #333;">hst_tele</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">HsForAllInvis</span><span class="p">{}</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#3c19c0be465f9a28d7b69f89c55648080fcc37eb"><strong>compiler/GHC/HsToCore/Quote.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -945,13 +945,18 @@ repDerivClause :: LHsDerivingClause GhcRn</td>
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<pre style="margin: 0;"> <span id="LC945" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MetaM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Core</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">M</span> <span class="kt" style="color: #458; font-weight: 600;">TH</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">DerivClause</span><span class="p">))</span></span>
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<pre style="margin: 0;"> <span id="LC946" class="line" lang="haskell"><span class="n" style="color: #333;">repDerivClause</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsDerivingClause</span></span>
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<pre style="margin: 0;"> <span id="LC947" class="line" lang="haskell"> <span class="p">{</span> <span class="n" style="color: #333;">deriv_clause_strategy</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dcs</span></span>
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<pre style="margin: 0;">-<span id="LC948" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">deriv_clause_tys</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">L</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">dct</span> <span class="p">}))</span></span>
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<pre style="margin: 0;">+<span id="LC948" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">deriv_clause_tys</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dct</span> <span class="p">}))</span></span>
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<pre style="margin: 0;"> <span id="LC949" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">repDerivStrategy</span> <span class="n" style="color: #333;">dcs</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MkC</span> <span class="n" style="color: #333;">dcs'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span></span>
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<pre style="margin: 0;">-<span id="LC950" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="kt" style="color: #458; font-weight: 600;">MkC</span> <span class="n" style="color: #333;">dct'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">rep<span class="idiff left">ListM</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">typeTyConName</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">rep_deriv_ty</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">hsSigType</span></span><span class="p"><span class="idiff right">)</span></span> <span class="n" style="color: #333;">dct</span></span>
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<pre style="margin: 0;">+<span id="LC950" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="kt" style="color: #458; font-weight: 600;">MkC</span> <span class="n" style="color: #333;">dct'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">rep<span class="idiff left right">_deriv_clause_tys</span></span> <span class="n" style="color: #333;">dct</span></span>
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<pre style="margin: 0;"> <span id="LC951" class="line" lang="haskell"> <span class="n" style="color: #333;">rep2</span> <span class="n" style="color: #333;">derivClauseName</span> <span class="p">[</span><span class="n" style="color: #333;">dcs'</span><span class="p">,</span><span class="n" style="color: #333;">dct'</span><span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC952" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC953" class="line" lang="haskell"> <span class="n" style="color: #333;">rep_deriv_ty</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LHsType</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MetaM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Core</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">M</span> <span class="kt" style="color: #458; font-weight: 600;">TH</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">))</span></span>
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<pre style="margin: 0;">-<span id="LC954" class="line" lang="haskell"> <span class="n" style="color: #333;">rep_deriv_ty</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">repLTy</span> <span class="n" style="color: #333;">ty</span></span>
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<pre style="margin: 0;">+<span id="LC953" class="line" lang="haskell"> <span class="n" style="color: #333;">rep_deriv_clause_tys</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LDerivClauseTys</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MetaM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Core</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">M</span> <span class="kt" style="color: #458; font-weight: 600;">TH</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">])</span></span>
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<pre style="margin: 0;">+<span id="LC954" class="line" lang="haskell"> <span class="n" style="color: #333;">rep_deriv_clause_tys</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">dct</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">dct</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">+<span id="LC955" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">DctSingle</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">rep_deriv_tys</span> <span class="p">[</span><span class="n" style="color: #333;">ty</span><span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC956" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">DctMulti</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">tys</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">rep_deriv_tys</span> <span class="n" style="color: #333;">tys</span></span>
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<pre style="margin: 0;">+<span id="LC957" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC958" class="line" lang="haskell"> <span class="n" style="color: #333;">rep_deriv_tys</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">LHsSigType</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MetaM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Core</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">M</span> <span class="kt" style="color: #458; font-weight: 600;">TH</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">])</span></span>
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<pre style="margin: 0;">+<span id="LC959" class="line" lang="haskell"> <span class="n" style="color: #333;">rep_deriv_tys</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">repListM</span> <span class="n" style="color: #333;">typeTyConName</span> <span class="p">(</span><span class="n" style="color: #333;">repLTy</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">hsSigType</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC960" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC961" class="line" lang="haskell"><span class="n" style="color: #333;">rep_meth_sigs_binds</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">LSig</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LHsBinds</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span></span>
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<pre style="margin: 0;"> <span id="LC962" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MetaM</span> <span class="p">([</span><span class="kt" style="color: #458; font-weight: 600;">GenSymBind</span><span class="p">],</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Core</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">M</span> <span class="kt" style="color: #458; font-weight: 600;">TH</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Dec</span><span class="p">)])</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#649144a78135a23cabfc90dd83c4aabf448eb6ab"><strong>compiler/GHC/Iface/Ext/Ast.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -19,7 +19,7 @@ Main functions for .hie file generation</td>
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<pre style="margin: 0;"> <span id="LC19" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE TupleSections #-}</span></span>
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<pre style="margin: 0;"> <span id="LC20" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# OPTIONS_GHC -Wno-incomplete-uni-patterns #-}</span></span>
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<pre style="margin: 0;"> <span id="LC21" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC22" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">GHC.Iface.Ext.Ast</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">mkHieFile</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkHieFileWithSource</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">getCompressedAsts</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC22" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">GHC.Iface.Ext.Ast</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">mkHieFile</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkHieFileWithSource</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">getCompressedAsts</span><span class="p"><span class="idiff left">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff right">enrichHie</span></span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC23" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC24" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Outputable</span><span class="p">(</span><span class="n" style="color: #333;">ppr</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC25" class="line" lang="haskell"></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1507,12 +1507,16 @@ instance ToHie (Located [Located (HsDerivingClause GhcRn)]) where</td>
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<pre style="margin: 0;"> <span id="LC1507" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1508" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">ToHie</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsDerivingClause</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span><span class="p">))</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC1509" class="line" lang="haskell"> <span class="n" style="color: #333;">toHie</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">span</span> <span class="n" style="color: #333;">cl</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">concatM</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">makeNode</span> <span class="n" style="color: #333;">cl</span> <span class="n" style="color: #333;">span</span> <span class="o" style="font-weight: 600;">:</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">cl</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">-<span id="LC1510" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">HsDerivingClause</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">strat</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">L</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ispan</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">tys</span></span><span class="p"><span class="idiff right">)</span></span> <span class="o" style="font-weight: 600;">-></span></span>
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<pre style="margin: 0;">+<span id="LC1510" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">HsDerivingClause</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">strat</span> <span class="n" style="color: #333;"><span class="idiff left right">dct</span></span> <span class="o" style="font-weight: 600;">-></span></span>
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<pre style="margin: 0;"> <span id="LC1511" class="line" lang="haskell"> <span class="p">[</span> <span class="n" style="color: #333;">toHie</span> <span class="n" style="color: #333;">strat</span></span>
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<pre style="margin: 0;">-<span id="LC1512" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">locOnly</span> <span class="n" style="color: #333;">ispan</span></span>
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<pre style="margin: 0;">-<span id="LC1513" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">toHie</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">map</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TS</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ResolvedScopes</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">))</span> <span class="n" style="color: #333;">tys</span></span>
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<pre style="margin: 0;">+<span id="LC1512" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">toHie</span> <span class="n" style="color: #333;">dct</span></span>
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<pre style="margin: 0;"> <span id="LC1513" class="line" lang="haskell"> <span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC1514" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1515" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">ToHie</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DerivClauseTys</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span><span class="p">))</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC1516" class="line" lang="haskell"> <span class="n" style="color: #333;">toHie</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">span</span> <span class="n" style="color: #333;">dct</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">concatM</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">makeNode</span> <span class="n" style="color: #333;">dct</span> <span class="n" style="color: #333;">span</span> <span class="o" style="font-weight: 600;">:</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">dct</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">+<span id="LC1517" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">DctSingle</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span> <span class="n" style="color: #333;">toHie</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">TS</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ResolvedScopes[]</span><span class="p">)</span> <span class="n" style="color: #333;">ty</span> <span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC1518" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">DctMulti</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">tys</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span> <span class="n" style="color: #333;">toHie</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">map</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TS</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ResolvedScopes</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">))</span> <span class="n" style="color: #333;">tys</span> <span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC1519" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1520" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">ToHie</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DerivStrategy</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span><span class="p">))</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC1521" class="line" lang="haskell"> <span class="n" style="color: #333;">toHie</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">span</span> <span class="n" style="color: #333;">strat</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">concatM</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">makeNode</span> <span class="n" style="color: #333;">strat</span> <span class="n" style="color: #333;">span</span> <span class="o" style="font-weight: 600;">:</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">strat</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC1522" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">StockStrategy</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2276,15 +2276,13 @@ deriving :: { LHsDerivingClause GhcPs }</td>
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<pre style="margin: 0;"> <span id="LC2276" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">in</span> <span class="n" style="color: #333;">ams</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">full_loc</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">HsDerivingClause</span> <span class="n" style="color: #333;">noExtField</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">3</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">2</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC2277" class="line" lang="haskell"> <span class="p">[</span><span class="n" style="color: #333;">mj</span> <span class="kt" style="color: #458; font-weight: 600;">AnnDeriving</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span><span class="p">]</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC2278" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC2279" class="line" lang="haskell"><span class="n" style="color: #333;">deriv_clause_types</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">{</span> <span class="kt" style="color: #458; font-weight: 600;">L<span class="idiff left">ocated</span></span><span class="idiff"> </span><span class="p"><span class="idiff">[</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">LHsSigType</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">GhcPs</span></span><span class="p"><span class="idiff right">]</span></span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC2279" class="line" lang="haskell"><span class="n" style="color: #333;">deriv_clause_types</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">{</span> <span class="kt" style="color: #458; font-weight: 600;">L<span class="idiff left">DerivClauseTys</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">GhcPs</span></span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC2280" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">qtycon</span> <span class="p">{</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">{</span> <span class="n" style="color: #333;">tc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">sL1</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsTyVar</span> <span class="n" style="color: #333;">noExtField</span> <span class="kt" style="color: #458; font-weight: 600;">NotPromoted</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span><span class="p">)</span> <span class="p">}</span> <span class="kr" style="font-weight: 600;">in</span></span>
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<pre style="margin: 0;">-<span id="LC2281" class="line" lang="haskell"> <span class="n" style="color: #333;">sL1</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="p"><span class="idiff left">[</span></span><span class="n" style="color: #333;"><span class="idiff">mkLHsSigType</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">tc</span></span><span class="p"><span class="idiff right">]</span></span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC2282" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="sc" style="color: #d14;">'('</span> <span class="sc" style="color: #d14;">')'</span> <span class="p">{</span><span class="o" style="font-weight: 600;">%</span> <span class="n" style="color: #333;">ams</span> <span class="p">(</span><span class="n" style="color: #333;">sLL</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">$></span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">[]</span></span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC2281" class="line" lang="haskell"> <span class="n" style="color: #333;">sL1</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">DctSingle</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">noExtField</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">mkLHsSigType</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">tc</span></span><span class="p"><span class="idiff right">))</span></span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC2282" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="sc" style="color: #d14;">'('</span> <span class="sc" style="color: #d14;">')'</span> <span class="p">{</span><span class="o" style="font-weight: 600;">%</span> <span class="n" style="color: #333;">ams</span> <span class="p">(</span><span class="n" style="color: #333;">sLL</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">$></span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">DctMulti</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">noExtField</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">[]</span></span><span class="p"><span class="idiff right">)</span>)</span></span>
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<pre style="margin: 0;"> <span id="LC2283" class="line" lang="haskell"> <span class="p">[</span><span class="n" style="color: #333;">mop</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span><span class="p">,</span><span class="n" style="color: #333;">mcp</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">2</span><span class="p">]</span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC2284" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="sc" style="color: #d14;">'('</span> <span class="n" style="color: #333;">deriv_types</span> <span class="sc" style="color: #d14;">')'</span> <span class="p">{</span><span class="o" style="font-weight: 600;">%</span> <span class="n" style="color: #333;">ams</span> <span class="p">(</span><span class="n" style="color: #333;">sLL</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">$></span> <span class="o" style="font-weight: 600;"><span class="idiff left">$</span></span><span class="mi" style="color: #099;"><span class="idiff right">2</span></span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC2284" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="sc" style="color: #d14;">'('</span> <span class="n" style="color: #333;">deriv_types</span> <span class="sc" style="color: #d14;">')'</span> <span class="p">{</span><span class="o" style="font-weight: 600;">%</span> <span class="n" style="color: #333;">ams</span> <span class="p">(</span><span class="n" style="color: #333;">sLL</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">$></span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">DctMulti</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">noExtField</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$</span></span><span class="mi" style="color: #099;"><span class="idiff">2</span></span><span class="p"><span class="idiff right">)</span>)</span></span>
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<pre style="margin: 0;"> <span id="LC2285" class="line" lang="haskell"> <span class="p">[</span><span class="n" style="color: #333;">mop</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span><span class="p">,</span><span class="n" style="color: #333;">mcp</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">3</span><span class="p">]</span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC2286" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Glasgow extension: allow partial</span></span>
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<pre style="margin: 0;">-<span id="LC2287" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- applications in derivings</span></span>
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<pre style="margin: 0;"> <span id="LC2286" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2287" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-----------------------------------------------------------------------------</span></span>
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<pre style="margin: 0;"> <span id="LC2288" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Value definitions</span></span>
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<li id="13755bdc5d6c6b4c6f31604eb0da778521355795">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#13755bdc5d6c6b4c6f31604eb0da778521355795"><strong>compiler/GHC/Parser/PostProcess/Haddock.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -628,15 +628,34 @@ instance HasHaddock (Located (HsDerivingClause GhcPs)) where</td>
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<pre style="margin: 0;"> <span id="LC628" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ViaStrategy</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">))</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">pure</span> <span class="nb" style="color: #0086b3;">()</span><span class="p">,</span> <span class="n" style="color: #333;">registerLocHdkA</span> <span class="n" style="color: #333;">l</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC629" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">registerLocHdkA</span> <span class="n" style="color: #333;">l</span><span class="p">,</span> <span class="n" style="color: #333;">pure</span> <span class="nb" style="color: #0086b3;">()</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC630" class="line" lang="haskell"> <span class="n" style="color: #333;">register_strategy_before</span></span>
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<pre style="margin: 0;">-<span id="LC631" class="line" lang="haskell"> <span class="n" style="color: #333;">deriv_clause_tys'</span> <span class="o" style="font-weight: 600;"><-</span></span>
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<pre style="margin: 0;">-<span id="LC632" class="line" lang="haskell"> <span class="n" style="color: #333;">extendHdkA</span> <span class="p">(</span><span class="n" style="color: #333;">getLoc</span> <span class="n" style="color: #333;">deriv_clause_tys</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">-<span id="LC633" class="line" lang="haskell"> <span class="n" style="color: #333;">traverse</span> <span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="n" style="color: #333;">addHaddock</span> <span class="n" style="color: #333;">deriv_clause_tys</span></span>
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<pre style="margin: 0;">+<span id="LC631" class="line" lang="haskell"> <span class="n" style="color: #333;">deriv_clause_tys'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">addHaddock</span> <span class="n" style="color: #333;">deriv_clause_tys</span></span>
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<pre style="margin: 0;"> <span id="LC632" class="line" lang="haskell"> <span class="n" style="color: #333;">register_strategy_after</span></span>
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<pre style="margin: 0;"> <span id="LC633" class="line" lang="haskell"> <span class="n" style="color: #333;">pure</span> <span class="kt" style="color: #458; font-weight: 600;">HsDerivingClause</span></span>
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<pre style="margin: 0;"> <span id="LC634" class="line" lang="haskell"> <span class="p">{</span> <span class="n" style="color: #333;">deriv_clause_ext</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">noExtField</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC635" class="line" lang="haskell"> <span class="n" style="color: #333;">deriv_clause_strategy</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC636" class="line" lang="haskell"> <span class="n" style="color: #333;">deriv_clause_tys</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">deriv_clause_tys'</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC637" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC638" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Process the types in a single deriving clause, which may come in one of the</span></span>
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<pre style="margin: 0;">+<span id="LC639" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- following forms:</span></span>
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<pre style="margin: 0;">+<span id="LC640" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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<pre style="margin: 0;">+<span id="LC641" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 1. A singular type constructor:</span></span>
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<pre style="margin: 0;">+<span id="LC642" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- deriving Eq -- ^ Comment on Eq</span></span>
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<pre style="margin: 0;">+<span id="LC643" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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<pre style="margin: 0;">+<span id="LC644" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 2. A list of comma-separated types surrounded by enclosing parentheses:</span></span>
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<pre style="margin: 0;">+<span id="LC645" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- deriving ( Eq -- ^ Comment on Eq</span></span>
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<pre style="margin: 0;">+<span id="LC646" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- , C a -- ^ Comment on C a</span></span>
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<pre style="margin: 0;">+<span id="LC647" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- )</span></span>
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<pre style="margin: 0;">+<span id="LC648" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">HasHaddock</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DerivClauseTys</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span><span class="p">))</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC649" class="line" lang="haskell"> <span class="n" style="color: #333;">addHaddock</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l_dct</span> <span class="n" style="color: #333;">dct</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">+<span id="LC650" class="line" lang="haskell"> <span class="n" style="color: #333;">extendHdkA</span> <span class="n" style="color: #333;">l_dct</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">+<span id="LC651" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">dct</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">+<span id="LC652" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">DctSingle</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC653" class="line" lang="haskell"> <span class="n" style="color: #333;">ty'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">addHaddock</span> <span class="n" style="color: #333;">ty</span></span>
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<pre style="margin: 0;">+<span id="LC654" class="line" lang="haskell"> <span class="n" style="color: #333;">pure</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l_dct</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">DctSingle</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">ty'</span></span>
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<pre style="margin: 0;">+<span id="LC655" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">DctMulti</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">tys</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC656" class="line" lang="haskell"> <span class="n" style="color: #333;">tys'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">addHaddock</span> <span class="n" style="color: #333;">tys</span></span>
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<pre style="margin: 0;">+<span id="LC657" class="line" lang="haskell"> <span class="n" style="color: #333;">pure</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l_dct</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">DctMulti</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">tys'</span></span>
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<pre style="margin: 0;">+<span id="LC658" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC659" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Process a single data constructor declaration, which may come in one of the</span></span>
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<pre style="margin: 0;"> <span id="LC660" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- following forms:</span></span>
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<pre style="margin: 0;"> <span id="LC661" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#7dd1cd0f6f2164a14c83d9aa564dd32bc30e447a"><strong>compiler/GHC/Rename/Module.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1895,15 +1895,25 @@ rnLHsDerivingClause doc</td>
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<pre style="margin: 0;"> <span id="LC1895" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">loc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsDerivingClause</span></span>
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<pre style="margin: 0;"> <span id="LC1896" class="line" lang="haskell"> <span class="p">{</span> <span class="n" style="color: #333;">deriv_clause_ext</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">noExtField</span></span>
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<pre style="margin: 0;"> <span id="LC1897" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">deriv_clause_strategy</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dcs</span></span>
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<pre style="margin: 0;">-<span id="LC1898" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">deriv_clause_tys</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">L</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">loc'</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">dct</span> <span class="p">}))</span></span>
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<pre style="margin: 0;">+<span id="LC1898" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">deriv_clause_tys</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dct</span> <span class="p">}))</span></span>
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<pre style="margin: 0;"> <span id="LC1899" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">dcs'</span><span class="p">,</span> <span class="n" style="color: #333;">dct'</span><span class="p">,</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC1900" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">rnLDerivStrategy</span> <span class="n" style="color: #333;">doc</span> <span class="n" style="color: #333;">dcs</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;"><span class="idiff left">mapFvRn</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">rn_clause_pred</span></span> <span class="n" style="color: #333;">dct</span></span>
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<pre style="margin: 0;">+<span id="LC1900" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">rnLDerivStrategy</span> <span class="n" style="color: #333;">doc</span> <span class="n" style="color: #333;">dcs</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;"><span class="idiff left right">rn_deriv_clause_tys</span></span> <span class="n" style="color: #333;">dct</span></span>
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<pre style="margin: 0;"> <span id="LC1901" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">warnNoDerivStrat</span> <span class="n" style="color: #333;">dcs'</span> <span class="n" style="color: #333;">loc</span></span>
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1902
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1902
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<pre style="margin: 0;"> <span id="LC1902" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">pure</span> <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">loc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsDerivingClause</span> <span class="p">{</span> <span class="n" style="color: #333;">deriv_clause_ext</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">noExtField</span></span>
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1903
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1903
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<pre style="margin: 0;"> <span id="LC1903" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">deriv_clause_strategy</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dcs'</span></span>
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1904
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<pre style="margin: 0;">-<span id="LC1904" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">deriv_clause_tys</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">L</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">loc'</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">dct'</span> <span class="p">})</span></span>
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1904
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<pre style="margin: 0;">+<span id="LC1904" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">deriv_clause_tys</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dct'</span> <span class="p">})</span></span>
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1905
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1905
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<pre style="margin: 0;"> <span id="LC1905" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">fvs</span> <span class="p">)</span> <span class="p">}</span></span>
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1906
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1906
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<pre style="margin: 0;"> <span id="LC1906" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1907
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<pre style="margin: 0;">+<span id="LC1907" class="line" lang="haskell"> <span class="n" style="color: #333;">rn_deriv_clause_tys</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LDerivClauseTys</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span></span>
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1908
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<pre style="margin: 0;">+<span id="LC1908" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RnM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LDerivClauseTys</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">FreeVars</span><span class="p">)</span></span>
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1909
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<pre style="margin: 0;">+<span id="LC1909" class="line" lang="haskell"> <span class="n" style="color: #333;">rn_deriv_clause_tys</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="n" style="color: #333;">dct</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">dct</span> <span class="kr" style="font-weight: 600;">of</span></span>
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1910
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<pre style="margin: 0;">+<span id="LC1910" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">DctSingle</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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1911
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<pre style="margin: 0;">+<span id="LC1911" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">ty'</span><span class="p">,</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">rn_clause_pred</span> <span class="n" style="color: #333;">ty</span></span>
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1912
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<pre style="margin: 0;">+<span id="LC1912" class="line" lang="haskell"> <span class="n" style="color: #333;">pure</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DctSingle</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">ty'</span><span class="p">),</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span></span>
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1913
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<pre style="margin: 0;">+<span id="LC1913" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">DctMulti</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">tys</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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1914
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<pre style="margin: 0;">+<span id="LC1914" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">tys'</span><span class="p">,</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mapFvRn</span> <span class="n" style="color: #333;">rn_clause_pred</span> <span class="n" style="color: #333;">tys</span></span>
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1915
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<pre style="margin: 0;">+<span id="LC1915" class="line" lang="haskell"> <span class="n" style="color: #333;">pure</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DctMulti</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">tys'</span><span class="p">),</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span></span>
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1916
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<pre style="margin: 0;">+<span id="LC1916" class="line" lang="haskell"></span>
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1907
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1917
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<pre style="margin: 0;"> <span id="LC1917" class="line" lang="haskell"> <span class="n" style="color: #333;">rn_clause_pred</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LHsSigType</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RnM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LHsSigType</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">FreeVars</span><span class="p">)</span></span>
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1908
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1918
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<pre style="margin: 0;"> <span id="LC1918" class="line" lang="haskell"> <span class="n" style="color: #333;">rn_clause_pred</span> <span class="n" style="color: #333;">pred_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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1909
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1919
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<pre style="margin: 0;"> <span id="LC1919" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">inf_err</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Inferred type variables are not allowed"</span><span class="p">)</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -437,17 +437,22 @@ makeDerivSpecs :: [DerivInfo]</td>
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<pre style="margin: 0;"> <span id="LC437" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">EarlyDerivSpec</span><span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC438" class="line" lang="haskell"><span class="n" style="color: #333;">makeDerivSpecs</span> <span class="n" style="color: #333;">deriv_infos</span> <span class="n" style="color: #333;">deriv_decls</span></span>
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<pre style="margin: 0;"> <span id="LC439" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">eqns1</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">sequenceA</span></span>
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<pre style="margin: 0;">-<span id="LC440" class="line" lang="haskell"> <span class="p">[</span> <span class="n" style="color: #333;">deriveClause</span> <span class="n" style="color: #333;">rep_tc</span> <span class="n" style="color: #333;">scoped_tvs</span> <span class="n" style="color: #333;">dcs</span> <span class="n" style="color: #333;"><span class="idiff left right">preds</span></span> <span class="n" style="color: #333;">err_ctxt</span></span>
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<pre style="margin: 0;">+<span id="LC440" class="line" lang="haskell"> <span class="p">[</span> <span class="n" style="color: #333;">deriveClause</span> <span class="n" style="color: #333;">rep_tc</span> <span class="n" style="color: #333;">scoped_tvs</span> <span class="n" style="color: #333;">dcs</span> <span class="p"><span class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">deriv_clause_preds</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">dct</span></span><span class="p"><span class="idiff right">)</span></span> <span class="n" style="color: #333;">err_ctxt</span></span>
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<pre style="margin: 0;"> <span id="LC441" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">DerivInfo</span> <span class="p">{</span> <span class="n" style="color: #333;">di_rep_tc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rep_tc</span></span>
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<pre style="margin: 0;"> <span id="LC442" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">di_scoped_tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">scoped_tvs</span></span>
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<pre style="margin: 0;"> <span id="LC443" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">di_clauses</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">clauses</span></span>
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<pre style="margin: 0;"> <span id="LC444" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">di_ctxt</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">err_ctxt</span> <span class="p">}</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">deriv_infos</span></span>
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<pre style="margin: 0;"> <span id="LC445" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsDerivingClause</span> <span class="p">{</span> <span class="n" style="color: #333;">deriv_clause_strategy</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dcs</span></span>
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<pre style="margin: 0;">-<span id="LC446" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">deriv_clause_tys</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">L</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">preds</span></span> <span class="p">})</span></span>
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<pre style="margin: 0;">+<span id="LC446" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">deriv_clause_tys</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">dct</span></span> <span class="p">})</span></span>
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<pre style="margin: 0;"> <span id="LC447" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">clauses</span></span>
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<pre style="margin: 0;"> <span id="LC448" class="line" lang="haskell"> <span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC449" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">eqns2</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mapM</span> <span class="p">(</span><span class="n" style="color: #333;">recoverM</span> <span class="p">(</span><span class="n" style="color: #333;">pure</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span><span class="p">)</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">deriveStandalone</span><span class="p">)</span> <span class="n" style="color: #333;">deriv_decls</span></span>
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<pre style="margin: 0;"> <span id="LC450" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">concat</span> <span class="n" style="color: #333;">eqns1</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">catMaybes</span> <span class="n" style="color: #333;">eqns2</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC451" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC452" class="line" lang="haskell"> <span class="n" style="color: #333;">deriv_clause_preds</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LDerivClauseTys</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">LHsSigType</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span><span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC453" class="line" lang="haskell"> <span class="n" style="color: #333;">deriv_clause_preds</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">dct</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">dct</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">+<span id="LC454" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">DctSingle</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="n" style="color: #333;">ty</span><span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC455" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">DctMulti</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">tys</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">tys</span></span>
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<pre style="margin: 0;"> <span id="LC456" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC457" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">------------------------------------------------------------------</span></span>
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<pre style="margin: 0;"> <span id="LC458" class="line" lang="haskell"><span class="cd">-- | Process the derived classes in a single @deriving@ clause.</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#aebe2c3d616f6843166d2657bed048898add6bc9"><strong>compiler/GHC/Tc/Instance/Class.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -388,10 +388,9 @@ makeLitDict clas ty et</td>
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<pre style="margin: 0;"> <span id="LC388" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">co_dict</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInstNewTyCon_maybe</span> <span class="p">(</span><span class="n" style="color: #333;">classTyCon</span> <span class="n" style="color: #333;">clas</span><span class="p">)</span> <span class="p">[</span><span class="n" style="color: #333;">ty</span><span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC389" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- co_dict :: KnownNat n ~ SNat n</span></span>
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<pre style="margin: 0;"> <span id="LC390" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[</span> <span class="n" style="color: #333;">meth</span> <span class="p">]</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">classMethods</span> <span class="n" style="color: #333;">clas</span></span>
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<pre style="margin: 0;">-<span id="LC391" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">tcRep</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tyConAppTyCon_maybe</span> <span class="c1" style="color: #998; font-style: italic;">-- SNat</span></span>
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392
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<pre style="margin: 0;">-<span id="LC392" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">funResultTy</span> <span class="c1" style="color: #998; font-style: italic;">-- SNat n</span></span>
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393
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<pre style="margin: 0;">-<span id="LC393" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">dropForAlls</span> <span class="c1" style="color: #998; font-style: italic;">-- KnownNat n => SNat n</span></span>
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<pre style="margin: 0;">-<span id="LC394" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">meth</span> <span class="c1" style="color: #998; font-style: italic;">-- forall n. KnownNat n => SNat n</span></span>
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<pre style="margin: 0;">+<span id="LC391" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">tcRep</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tyConAppTyCon_maybe</span> <span class="p">(</span><span class="n" style="color: #333;">classMethodTy</span> <span class="n" style="color: #333;">meth</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC392" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- If the method type is forall n. KnownNat n => SNat n</span></span>
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<pre style="margin: 0;">+<span id="LC393" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- then tcRep is SNat</span></span>
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<pre style="margin: 0;"> <span id="LC394" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">co_rep</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInstNewTyCon_maybe</span> <span class="n" style="color: #333;">tcRep</span> <span class="p">[</span><span class="n" style="color: #333;">ty</span><span class="p">]</span></span>
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396
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<pre style="margin: 0;"> <span id="LC395" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- SNat n ~ Integer</span></span>
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<pre style="margin: 0;"> <span id="LC396" class="line" lang="haskell"> <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">ev_tm</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkEvCast</span> <span class="n" style="color: #333;">et</span> <span class="p">(</span><span class="n" style="color: #333;">mkTcSymCo</span> <span class="p">(</span><span class="n" style="color: #333;">mkTcTransCo</span> <span class="n" style="color: #333;">co_dict</span> <span class="n" style="color: #333;">co_rep</span><span class="p">))</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#e65390fa5a32c453a81a1c9a3e1c4464d155ca4a"><strong>compiler/GHC/Tc/Module.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -65,9 +65,10 @@ import GHC.Builtin.Types ( unitTy, mkListTy )</td>
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<pre style="margin: 0;"> <span id="LC65" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Driver.Plugins</span></span>
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<pre style="margin: 0;"> <span id="LC66" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Driver.Session</span></span>
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<pre style="margin: 0;"> <span id="LC67" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Hs</span></span>
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<pre style="margin: 0;">-<span id="LC68" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Iface.Syntax</span> <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">ShowSub</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="nf" style="color: #900; font-weight: 600;">showToHeader</span> <span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC69" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Iface.Type</span> <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">ShowForAllFlag</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">)</span> <span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC70" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.PatSyn</span><span class="p">(</span> <span class="n" style="color: #333;">pprPatSynType</span> <span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC68" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Iface.Syntax</span> <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">ShowSub</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="nf" style="color: #900; font-weight: 600;">showToHeader</span> <span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC69" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Iface.Type</span> <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">ShowForAllFlag</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">)</span> <span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC70" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.PatSyn</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">pprPatSynType</span> <span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC71" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Predicate</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">classMethodTy</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC72" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Builtin.Names</span></span>
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<pre style="margin: 0;"> <span id="LC73" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Builtin.Utils</span></span>
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<pre style="margin: 0;"> <span id="LC74" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Name.Reader</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1014,10 +1015,8 @@ checkBootTyCon is_boot tc1 tc2</td>
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1014
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<pre style="margin: 0;"> <span id="LC1015" class="line" lang="haskell"> <span class="n" style="color: #333;">name2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">idName</span> <span class="n" style="color: #333;">id2</span></span>
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1016
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<pre style="margin: 0;"> <span id="LC1016" class="line" lang="haskell"> <span class="n" style="color: #333;">pname1</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">quotes</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">name1</span><span class="p">)</span></span>
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1016
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1017
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<pre style="margin: 0;"> <span id="LC1017" class="line" lang="haskell"> <span class="n" style="color: #333;">pname2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">quotes</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">name2</span><span class="p">)</span></span>
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1017
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<pre style="margin: 0;">-<span id="LC1017" class="line" lang="haskell"> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">rho_ty1</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">splitForAllTys</span> <span class="p">(</span><span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">id1</span><span class="p">)</span></span>
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1018
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<pre style="margin: 0;">-<span id="LC1018" class="line" lang="haskell"> <span class="n" style="color: #333;">op_ty1</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">funResultTy</span> <span class="n" style="color: #333;">rho_ty1</span></span>
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1019
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<pre style="margin: 0;">-<span id="LC1019" class="line" lang="haskell"> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">rho_ty2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">splitForAllTys</span> <span class="p">(</span><span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">id2</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC1020" class="line" lang="haskell"> <span class="n" style="color: #333;">op_ty2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">funResultTy</span> <span class="n" style="color: #333;">rho_ty2</span></span>
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<pre style="margin: 0;">+<span id="LC1018" class="line" lang="haskell"> <span class="n" style="color: #333;">op_ty1</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">classMethodTy</span> <span class="n" style="color: #333;">id1</span></span>
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<pre style="margin: 0;">+<span id="LC1019" class="line" lang="haskell"> <span class="n" style="color: #333;">op_ty2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">classMethodTy</span> <span class="n" style="color: #333;">id2</span></span>
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<pre style="margin: 0;"> <span id="LC1020" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1021" class="line" lang="haskell"> <span class="n" style="color: #333;">eqAT</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ATI</span> <span class="n" style="color: #333;">tc1</span> <span class="n" style="color: #333;">def_ats1</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ATI</span> <span class="n" style="color: #333;">tc2</span> <span class="n" style="color: #333;">def_ats2</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC1022" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">checkBootTyCon</span> <span class="n" style="color: #333;">is_boot</span> <span class="n" style="color: #333;">tc1</span> <span class="n" style="color: #333;">tc2</span> <span class="p">`</span><span class="n" style="color: #333;">andThenCheck</span><span class="p">`</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#54436e21ea530a66a8a71bcc01c836f4740b8f02"><strong>compiler/GHC/Tc/Solver.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1374,7 +1374,7 @@ growThetaTyVars theta tcvs</td>
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<pre style="margin: 0;"> <span id="LC1374" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">transCloVarSet</span> <span class="n" style="color: #333;">mk_next</span> <span class="n" style="color: #333;">seed_tcvs</span></span>
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<pre style="margin: 0;"> <span id="LC1375" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC1376" class="line" lang="haskell"> <span class="n" style="color: #333;">seed_tcvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcvs</span> <span class="p">`</span><span class="n" style="color: #333;">unionVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">tyCoVarsOfTypes</span> <span class="n" style="color: #333;">ips</span></span>
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<pre style="margin: 0;">-<span id="LC1377" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">ips</span><span class="p">,</span> <span class="n" style="color: #333;">non_ips</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">partition</span> <span class="n" style="color: #333;">isIPPred</span> <span class="n" style="color: #333;">theta</span></span>
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<pre style="margin: 0;">+<span id="LC1377" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">ips</span><span class="p">,</span> <span class="n" style="color: #333;">non_ips</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">partition</span> <span class="n" style="color: #333;">isIP<span class="idiff left right">Like</span>Pred</span> <span class="n" style="color: #333;">theta</span></span>
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<pre style="margin: 0;"> <span id="LC1378" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Inheriting implicit parameters] in GHC.Tc.Utils.TcType</span></span>
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<pre style="margin: 0;"> <span id="LC1379" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1380" class="line" lang="haskell"> <span class="n" style="color: #333;">mk_next</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarSet</span> <span class="c1" style="color: #998; font-style: italic;">-- Maps current set to newly-grown ones</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#f018e77421f495c6f75733fee4a511cfe57bebe8"><strong>compiler/GHC/Tc/Solver/Canonical.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -29,7 +29,7 @@ import GHC.Core.Multiplicity</td>
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<pre style="margin: 0;"> <span id="LC29" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.TyCo.Rep</span> <span class="c1" style="color: #998; font-style: italic;">-- cleverly decomposes types, good for completeness checking</span></span>
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<pre style="margin: 0;"> <span id="LC30" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Coercion</span></span>
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<pre style="margin: 0;"> <span id="LC31" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core</span></span>
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<pre style="margin: 0;">-<span id="LC32" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Id</span><span class="p">(</span> <span class="n" style="color: #333;"><span class="idiff left">idType</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">mkTemplateLocals</span> <span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC32" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Id</span><span class="p">(</span> <span class="n" style="color: #333;">mkTemplateLocals</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC33" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.FamInstEnv</span> <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">FamInstEnvs</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC34" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Instance.Family</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">tcTopNormaliseNewTypeTF_maybe</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC35" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Var</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -542,7 +542,7 @@ mk_strict_superclasses rec_clss (CtGiven { ctev_evar = evar, ctev_loc = loc })</td>
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<pre style="margin: 0;"> <span id="LC542" class="line" lang="haskell"> <span class="n" style="color: #333;">mk_given_desc</span> <span class="n" style="color: #333;">sel_id</span> <span class="n" style="color: #333;">sc_pred</span></span>
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<pre style="margin: 0;"> <span id="LC543" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">mk_superclasses</span> <span class="n" style="color: #333;">rec_clss</span> <span class="n" style="color: #333;">given_ev</span> <span class="n" style="color: #333;">tvs</span> <span class="n" style="color: #333;">theta</span> <span class="n" style="color: #333;">sc_pred</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC544" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC545" class="line" lang="haskell"> <span class="n" style="color: #333;">sc_pred</span> <span class="idiff left"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">funResultTy</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">piResultTys</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">idType</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">sel_id</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">tys</span></span><span class="p"><span class="idiff right">)</span></span></span>
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<pre style="margin: 0;">+<span id="LC545" class="line" lang="haskell"> <span class="n" style="color: #333;">sc_pred</span> <span class="o" style="font-weight: 600;"><span class="idiff left">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">classMethodInstTy</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">sel_id</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">tys</span></span></span>
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<pre style="margin: 0;"> <span id="LC546" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC547" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Nested quantified constraint superclasses]</span></span>
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<pre style="margin: 0;"> <span id="LC548" class="line" lang="haskell"> <span class="n" style="color: #333;">mk_given_desc</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PredType</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PredType</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">EvTerm</span><span class="p">)</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#f639b0b31b7245cb7d34ac190b798f5ec1c7da2e"><strong>compiler/GHC/Tc/Solver/Interact.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -566,10 +566,10 @@ solveOneFromTheOther ev_i ev_w</td>
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<pre style="margin: 0;"> <span id="LC566" class="line" lang="haskell"> <span class="n" style="color: #333;">ev_id_w</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ctEvEvId</span> <span class="n" style="color: #333;">ev_w</span></span>
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<pre style="margin: 0;"> <span id="LC567" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC568" class="line" lang="haskell"> <span class="n" style="color: #333;">different_level_strategy</span> <span class="c1" style="color: #998; font-style: italic;">-- Both Given</span></span>
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<pre style="margin: 0;">-<span id="LC569" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isIPPred</span> <span class="n" style="color: #333;">pred</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">lvl_w</span> <span class="o" style="font-weight: 600;">></span> <span class="n" style="color: #333;">lvl_i</span> <span class="kr" style="font-weight: 600;">then</span> <span class="kt" style="color: #458; font-weight: 600;">KeepWork</span> <span class="kr" style="font-weight: 600;">else</span> <span class="kt" style="color: #458; font-weight: 600;">KeepInert</span></span>
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<pre style="margin: 0;">-<span id="LC570" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">lvl_w</span> <span class="o" style="font-weight: 600;">></span> <span class="n" style="color: #333;">lvl_i</span> <span class="kr" style="font-weight: 600;">then</span> <span class="kt" style="color: #458; font-weight: 600;">KeepInert</span> <span class="kr" style="font-weight: 600;">else</span> <span class="kt" style="color: #458; font-weight: 600;">KeepWork</span></span>
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<pre style="margin: 0;">+<span id="LC569" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isIP<span class="idiff left right">Like</span>Pred</span> <span class="n" style="color: #333;">pred</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">lvl_w</span> <span class="o" style="font-weight: 600;">></span> <span class="n" style="color: #333;">lvl_i</span> <span class="kr" style="font-weight: 600;">then</span> <span class="kt" style="color: #458; font-weight: 600;">KeepWork</span> <span class="kr" style="font-weight: 600;">else</span> <span class="kt" style="color: #458; font-weight: 600;">KeepInert</span></span>
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<pre style="margin: 0;">+<span id="LC570" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="idiff left right"> </span><span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">lvl_w</span> <span class="o" style="font-weight: 600;">></span> <span class="n" style="color: #333;">lvl_i</span> <span class="kr" style="font-weight: 600;">then</span> <span class="kt" style="color: #458; font-weight: 600;">KeepInert</span> <span class="kr" style="font-weight: 600;">else</span> <span class="kt" style="color: #458; font-weight: 600;">KeepWork</span></span>
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<pre style="margin: 0;"> <span id="LC571" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Replacement vs keeping] (the different-level bullet)</span></span>
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<pre style="margin: 0;">-<span id="LC572" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- For the isIPPred case see Note [Shadowing of Implicit Parameters]</span></span>
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<pre style="margin: 0;">+<span id="LC572" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- For the isIP<span class="idiff left right">Like</span>Pred case see Note [Shadowing of Implicit Parameters]</span></span>
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<pre style="margin: 0;"> <span id="LC573" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC574" class="line" lang="haskell"> <span class="n" style="color: #333;">same_level_strategy</span> <span class="n" style="color: #333;">binds</span> <span class="c1" style="color: #998; font-style: italic;">-- Both Given</span></span>
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575
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<pre style="margin: 0;"> <span id="LC575" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">GivenOrigin</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">InstSC</span> <span class="n" style="color: #333;">s_i</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">ctLocOrigin</span> <span class="n" style="color: #333;">loc_i</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1071,6 +1071,8 @@ shortCutSolver dflags ev_w ev_i</td>
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1071
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<pre style="margin: 0;"> <span id="LC1071" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- programs should typecheck regardless of whether we take this step or</span></span>
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1072
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1072
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<pre style="margin: 0;"> <span id="LC1072" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- not. See Note [Shortcut solving]</span></span>
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1073
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1073
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<pre style="margin: 0;"> <span id="LC1073" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1074" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isIPLikePred</span> <span class="p">(</span><span class="n" style="color: #333;">ctEvPred</span> <span class="n" style="color: #333;">ev_w</span><span class="p">))</span> <span class="c1" style="color: #998; font-style: italic;">-- Not for implicit parameters (#18627)</span></span>
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1075
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<pre style="margin: 0;">+<span id="LC1075" class="line" lang="haskell"></span>
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1076
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<pre style="margin: 0;"> <span id="LC1076" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">xopt</span> <span class="kt" style="color: #458; font-weight: 600;">LangExt</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">IncoherentInstances</span> <span class="n" style="color: #333;">dflags</span><span class="p">)</span></span>
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1075
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1077
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<pre style="margin: 0;"> <span id="LC1077" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- If IncoherentInstances is on then we cannot rely on coherence of proofs</span></span>
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1076
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1078
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<pre style="margin: 0;"> <span id="LC1078" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- in order to justify this optimization: The proof provided by the</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1079,6 +1081,7 @@ shortCutSolver dflags ev_w ev_i</td>
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1079
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1081
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<pre style="margin: 0;"> <span id="LC1081" class="line" lang="haskell"></span>
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1082
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<pre style="margin: 0;"> <span id="LC1082" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">gopt</span> <span class="kt" style="color: #458; font-weight: 600;">Opt_SolveConstantDicts</span> <span class="n" style="color: #333;">dflags</span></span>
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1081
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1083
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<pre style="margin: 0;"> <span id="LC1083" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Enabled by the -fsolve-constant-dicts flag</span></span>
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1084
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<pre style="margin: 0;">+<span id="LC1084" class="line" lang="haskell"></span>
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1082
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1085
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<pre style="margin: 0;"> <span id="LC1085" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">ev_binds_var</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getTcEvBindsVar</span></span>
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1083
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1086
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<pre style="margin: 0;"> <span id="LC1086" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">ev_binds</span> <span class="o" style="font-weight: 600;"><-</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT2</span><span class="p">(</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isCoEvBindsVar</span> <span class="n" style="color: #333;">ev_binds_var</span> <span class="p">),</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ev_w</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC1087" class="line" lang="haskell"> <span class="n" style="color: #333;">getTcEvBindsMap</span> <span class="n" style="color: #333;">ev_binds_var</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#0c6b585a8a21f8340a85ca2cef89c4b1bf5a8953"><strong>compiler/GHC/Tc/Solver/Monad.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2527,8 +2527,7 @@ emptyDictMap = emptyTcAppMap</td>
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<pre style="margin: 0;"> <span id="LC2527" class="line" lang="haskell"></span>
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2528
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<pre style="margin: 0;"> <span id="LC2528" class="line" lang="haskell"><span class="n" style="color: #333;">findDict</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DictMap</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CtLoc</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Class</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="n" style="color: #333;">a</span></span>
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<pre style="margin: 0;"> <span id="LC2529" class="line" lang="haskell"><span class="n" style="color: #333;">findDict</span> <span class="n" style="color: #333;">m</span> <span class="n" style="color: #333;">loc</span> <span class="n" style="color: #333;">cls</span> <span class="n" style="color: #333;">tys</span></span>
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2530
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<pre style="margin: 0;">-<span id="LC2530" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isCTupleClass</span> <span class="n" style="color: #333;">cls</span></span>
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<pre style="margin: 0;">-<span id="LC2531" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">any</span> <span class="n" style="color: #333;">hasIPPred</span> <span class="n" style="color: #333;">tys</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Tuples hiding implicit parameters]</span></span>
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<pre style="margin: 0;">+<span id="LC2530" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">hasIPSuperClasses</span> <span class="n" style="color: #333;">cls</span> <span class="n" style="color: #333;">tys</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Tuples hiding implicit parameters]</span></span>
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2532
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<pre style="margin: 0;"> <span id="LC2531" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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<pre style="margin: 0;"> <span id="LC2532" class="line" lang="haskell"></span>
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2534
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<pre style="margin: 0;"> <span id="LC2533" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">{}</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">isCallStackPred</span> <span class="n" style="color: #333;">cls</span> <span class="n" style="color: #333;">tys</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#e63425e031ffe9350ee6b1687e506aaea75d11e1"><strong>compiler/GHC/Tc/TyCl/Instance.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -54,6 +54,7 @@ import GHC.Core.Make ( nO_METHOD_BINDING_ERROR_ID )</td>
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<pre style="margin: 0;"> <span id="LC54" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Unfold.Make</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">mkInlineUnfoldingWithArity</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkDFunUnfolding</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC55" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Type</span></span>
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<pre style="margin: 0;"> <span id="LC56" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.SimpleOpt</span></span>
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<pre style="margin: 0;">+<span id="LC57" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Predicate</span><span class="p">(</span> <span class="n" style="color: #333;">classMethodInstTy</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC58" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Types.Evidence</span></span>
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<pre style="margin: 0;"> <span id="LC59" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.TyCon</span></span>
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<pre style="margin: 0;"> <span id="LC60" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Coercion.Axiom</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1634,7 +1635,7 @@ tcMethods dfun_id clas tyvars dfun_ev_vars inst_tys</td>
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1634
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<pre style="margin: 0;"> <span id="LC1635" class="line" lang="haskell"> <span class="n" style="color: #333;">nO_METHOD_BINDING_ERROR_ID</span></span>
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1635
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1636
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<pre style="margin: 0;"> <span id="LC1636" class="line" lang="haskell"> <span class="n" style="color: #333;">error_msg</span> <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">inst_loc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsLit</span> <span class="n" style="color: #333;">noExtField</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsStringPrim</span> <span class="kt" style="color: #458; font-weight: 600;">NoSourceText</span></span>
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1636
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1637
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<pre style="margin: 0;"> <span id="LC1637" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">unsafeMkByteString</span> <span class="p">(</span><span class="n" style="color: #333;">error_string</span> <span class="n" style="color: #333;">dflags</span><span class="p">))))</span></span>
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1637
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<pre style="margin: 0;">-<span id="LC1637" class="line" lang="haskell"> <span class="n" style="color: #333;">meth_tau</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">funResultTy</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">piResultTys</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">idType</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">sel_id</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">inst_tys</span></span><span class="p"><span class="idiff right">)</span></span></span>
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<pre style="margin: 0;">+<span id="LC1638" class="line" lang="haskell"> <span class="n" style="color: #333;">meth_tau</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">classMethodInstTy</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">sel_id</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">inst_tys</span></span></span>
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1638
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1639
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<pre style="margin: 0;"> <span id="LC1639" class="line" lang="haskell"> <span class="n" style="color: #333;">error_string</span> <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">showSDoc</span> <span class="n" style="color: #333;">dflags</span></span>
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1639
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1640
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<pre style="margin: 0;"> <span id="LC1640" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">hcat</span> <span class="p">[</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">inst_loc</span><span class="p">,</span> <span class="n" style="color: #333;">vbar</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">sel_id</span> <span class="p">])</span></span>
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1640
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1641
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<pre style="margin: 0;"> <span id="LC1641" class="line" lang="haskell"> <span class="n" style="color: #333;">lam_wrapper</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkWpTyLams</span> <span class="n" style="color: #333;">tyvars</span> <span class="o" style="font-weight: 600;"><.></span> <span class="n" style="color: #333;">mkWpLams</span> <span class="n" style="color: #333;">dfun_ev_vars</span></span>
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<li id="5461e7beeb7ae73d7c01f720cbaa3fa2c5333590">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#5461e7beeb7ae73d7c01f720cbaa3fa2c5333590"><strong>compiler/GHC/Tc/Utils/TcType.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -79,7 +79,7 @@ module GHC.Tc.Utils.TcType (</td>
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<pre style="margin: 0;"> <span id="LC79" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">isFloatingTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isDoubleTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isFloatTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isIntTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isWordTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isStringTy</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC80" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">isIntegerTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isNaturalTy</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC81" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">isBoolTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isUnitTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isCharTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isCallStackTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isCallStackPred</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC82" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;"><span class="idiff left">hasIPPred</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff right"> </span><span class="nf" style="color: #900; font-weight: 600;">isTauTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isTauTyCon</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcIsTyVarTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcIsForAllTy</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC82" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">isTauTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isTauTyCon</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcIsTyVarTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcIsForAllTy</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC83" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">isPredTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isTyVarClassPred</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isTyVarHead</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isInsolubleOccursCheck</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC84" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">checkValidClsArgs</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">hasTyVarHead</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC85" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">isRigidTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isAlmostFunctionFree</span><span class="p">,</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -141,7 +141,7 @@ module GHC.Tc.Utils.TcType (</td>
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141
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<pre style="margin: 0;"> <span id="LC141" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkTyConTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkTyVarTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkTyVarTys</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC142" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkTyCoVarTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkTyCoVarTys</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC143" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC144" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">isClassPred</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isEqPrimPred</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isIPPred</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isEqPred</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isEqPredClass</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC144" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">isClassPred</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isEqPrimPred</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isIP<span class="idiff left right">Like</span>Pred</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isEqPred</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isEqPredClass</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC145" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkClassPred</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC146" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">tcSplitDFunTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcSplitDFunHead</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcSplitMethodTy</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC147" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">isRuntimeRepVar</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isKindLevPoly</span><span class="p">,</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1747,7 +1747,7 @@ pickCapturedPreds</td>
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<pre style="margin: 0;"> <span id="LC1747" class="line" lang="haskell"><span class="n" style="color: #333;">pickCapturedPreds</span> <span class="n" style="color: #333;">qtvs</span> <span class="n" style="color: #333;">theta</span></span>
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<pre style="margin: 0;"> <span id="LC1748" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">filter</span> <span class="n" style="color: #333;">captured</span> <span class="n" style="color: #333;">theta</span></span>
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<pre style="margin: 0;"> <span id="LC1749" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC1750" class="line" lang="haskell"> <span class="n" style="color: #333;">captured</span> <span class="n" style="color: #333;">pred</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isIPPred</span> <span class="n" style="color: #333;">pred</span> <span class="o" style="font-weight: 600;">||</span> <span class="p">(</span><span class="n" style="color: #333;">tyCoVarsOfType</span> <span class="n" style="color: #333;">pred</span> <span class="p">`</span><span class="n" style="color: #333;">intersectsVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">qtvs</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC1750" class="line" lang="haskell"> <span class="n" style="color: #333;">captured</span> <span class="n" style="color: #333;">pred</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isIP<span class="idiff left right">Like</span>Pred</span> <span class="n" style="color: #333;">pred</span> <span class="o" style="font-weight: 600;">||</span> <span class="p">(</span><span class="n" style="color: #333;">tyCoVarsOfType</span> <span class="n" style="color: #333;">pred</span> <span class="p">`</span><span class="n" style="color: #333;">intersectsVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">qtvs</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC1751" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1752" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1753" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Superclasses</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#2eac51f9871ca0c0698aa1fc7f79c05ef8fc4a49"><strong>compiler/GHC/ThToHs.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1393,12 +1393,25 @@ cvtContext p tys = do { preds' <- mapM cvtPred tys</td>
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<pre style="margin: 0;"> <span id="LC1393" class="line" lang="haskell"><span class="n" style="color: #333;">cvtPred</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TH</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Pred</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CvtM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LHsType</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC1394" class="line" lang="haskell"><span class="n" style="color: #333;">cvtPred</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cvtType</span></span>
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<pre style="margin: 0;"> <span id="LC1395" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1396" class="line" lang="haskell"><span class="n" style="color: #333;">cvtDerivClauseTys</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TH</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Cxt</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CvtM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LDerivClauseTys</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC1397" class="line" lang="haskell"><span class="n" style="color: #333;">cvtDerivClauseTys</span> <span class="n" style="color: #333;">tys</span></span>
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<pre style="margin: 0;">+<span id="LC1398" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">tys'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mapM</span> <span class="n" style="color: #333;">cvtType</span> <span class="n" style="color: #333;">tys</span></span>
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<pre style="margin: 0;">+<span id="LC1399" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Since TH.Cxt doesn't indicate the presence or absence of</span></span>
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<pre style="margin: 0;">+<span id="LC1400" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- parentheses in a deriving clause, we have to choose between</span></span>
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<pre style="margin: 0;">+<span id="LC1401" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- DctSingle and DctMulti somewhat arbitrarily. We opt to use DctMulti</span></span>
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<pre style="margin: 0;">+<span id="LC1402" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- unless the TH.Cxt is a singleton list whose type is a bare type</span></span>
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1403
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<pre style="margin: 0;">+<span id="LC1403" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- constructor with no arguments.</span></span>
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<pre style="margin: 0;">+<span id="LC1404" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">tys'</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">+<span id="LC1405" class="line" lang="haskell"> <span class="p">[</span><span class="n" style="color: #333;">ty'</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsTyVar</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kt" style="color: #458; font-weight: 600;">NotPromoted</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">))]</span></span>
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1406
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<pre style="margin: 0;">+<span id="LC1406" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">DctSingle</span> <span class="n" style="color: #333;">noExtField</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkLHsSigType</span> <span class="n" style="color: #333;">ty'</span></span>
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<pre style="margin: 0;">+<span id="LC1407" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">returnL</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">DctMulti</span> <span class="n" style="color: #333;">noExtField</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">mkLHsSigType</span> <span class="n" style="color: #333;">tys'</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC1408" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1409" class="line" lang="haskell"><span class="n" style="color: #333;">cvtDerivClause</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TH</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">DerivClause</span></span>
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<pre style="margin: 0;"> <span id="LC1410" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CvtM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LHsDerivingClause</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC1398" class="line" lang="haskell"><span class="n" style="color: #333;">cvtDerivClause</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TH</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">DerivClause</span> <span class="n" style="color: #333;">ds</span> <span class="n" style="color: #333;"><span class="idiff left right">ctxt</span></span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC1399" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;"><span class="idiff left">ctxt'</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff"><-</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fmap</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">map</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">mkLHsSigType</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff"><$></span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">cvtContext</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">appPrec</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">ctxt</span></span></span>
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<pre style="margin: 0;">-<span id="LC1400" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">ds'</span> <span class="idiff left right"> </span><span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">traverse</span> <span class="n" style="color: #333;">cvtDerivStrategy</span> <span class="n" style="color: #333;">ds</span></span>
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<pre style="margin: 0;">-<span id="LC1401" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">returnL</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">HsDerivingClause</span> <span class="n" style="color: #333;">noExtField</span> <span class="n" style="color: #333;">ds'</span> <span class="n" style="color: #333;"><span class="idiff left right">ctxt</span>'</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC1411" class="line" lang="haskell"><span class="n" style="color: #333;">cvtDerivClause</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TH</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">DerivClause</span> <span class="n" style="color: #333;">ds</span> <span class="n" style="color: #333;"><span class="idiff left right">tys</span></span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC1412" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;"><span class="idiff left">tys'</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff"><-</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">cvtDerivClauseTys</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">tys</span></span></span>
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<pre style="margin: 0;">+<span id="LC1413" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">ds'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">traverse</span> <span class="n" style="color: #333;">cvtDerivStrategy</span> <span class="n" style="color: #333;">ds</span></span>
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<pre style="margin: 0;">+<span id="LC1414" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">returnL</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">HsDerivingClause</span> <span class="n" style="color: #333;">noExtField</span> <span class="n" style="color: #333;">ds'</span> <span class="n" style="color: #333;"><span class="idiff left right">tys</span>'</span> <span class="p">}</span></span>
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1415
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<pre style="margin: 0;"> <span id="LC1415" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1416" class="line" lang="haskell"><span class="n" style="color: #333;">cvtDerivStrategy</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TH</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">DerivStrategy</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CvtM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Hs</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">LDerivStrategy</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC1417" class="line" lang="haskell"><span class="n" style="color: #333;">cvtDerivStrategy</span> <span class="kt" style="color: #458; font-weight: 600;">TH</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">StockStrategy</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">returnL</span> <span class="kt" style="color: #458; font-weight: 600;">Hs</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">StockStrategy</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1253,7 +1253,7 @@ recommended for everyday use!</td>
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<pre style="margin: 0;"> <span id="LC1253" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC1254" class="line" lang="plaintext">.. rts-flag:: -B</span>
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<pre style="margin: 0;"> <span id="LC1255" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">-<span id="LC1256" class="line" lang="plaintext"> Sound the bell at the start of each <span class="idiff left right">(major) </span>garbage collection.</span>
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<pre style="margin: 0;">+<span id="LC1256" class="line" lang="plaintext"> Sound the bell at the start of each garbage collection.</span>
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<pre style="margin: 0;"> <span id="LC1257" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC1258" class="line" lang="plaintext"> Oddly enough, people really do use this option! Our pal in Durham</span>
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<pre style="margin: 0;"> <span id="LC1259" class="line" lang="plaintext"> (England), Paul Callaghan, writes: “Some people here use it for a</span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#db575e081e1764bd580624cab286af92c361e338"><strong>testsuite/tests/simplCore/should_compile/T18649.hs</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE ImplicitParams #-}</span></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE ConstraintKinds #-}</span></span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE FlexibleContexts #-}</span></span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">Test</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Prelude</span></span>
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">Hidden</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"> <span class="p">(</span> <span class="o" style="font-weight: 600;">?</span><span class="n" style="color: #333;">enable</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">a</span></span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Eq</span> <span class="n" style="color: #333;">a</span> <span class="c1" style="color: #998; font-style: italic;">-- removing this "fixes" the issue</span></span>
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"> <span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# NOINLINE a #-}</span></span>
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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Hidden</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">Integer</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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16
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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell"><span class="n" style="color: #333;">a</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="o" style="font-weight: 600;">?</span><span class="n" style="color: #333;">enable</span></span>
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17
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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell"><span class="n" style="color: #333;">system</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Hidden</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"><span class="n" style="color: #333;">system</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">a</span> <span class="mi" style="color: #099;">0</span></span>
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20
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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC21" class="line" lang="haskell"><span class="n" style="color: #333;">topEntity</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;">+<span id="LC22" class="line" lang="haskell"><span class="n" style="color: #333;">topEntity</span> <span class="n" style="color: #333;">ena</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">let</span> <span class="o" style="font-weight: 600;">?</span><span class="n" style="color: #333;">enable</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ena</span></span>
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<pre style="margin: 0;">+<span id="LC23" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">in</span> <span class="n" style="color: #333;">system</span></span>
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<pre style="margin: 0;">+<span id="LC24" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC25" class="line" lang="haskell"><span class="n" style="color: #333;">someVar</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">let</span> <span class="o" style="font-weight: 600;">?</span><span class="n" style="color: #333;">enable</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>
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<pre style="margin: 0;">+<span id="LC26" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">in</span> <span class="n" style="color: #333;">system</span></span></pre>
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<li id="fb99e471747eafcf334c714ee478740a4b9f4198">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#fb99e471747eafcf334c714ee478740a4b9f4198"><strong>testsuite/tests/simplCore/should_compile/T18649.stderr</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">==================== Tidy Core rules ====================</span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext"></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#fc07c260b75644727a8cdc1af5c861a44d4bfb5e"><strong>testsuite/tests/simplCore/should_compile/all.T</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -333,3 +333,7 @@ test('T18347', normal, compile, ['-dcore-lint -O'])</td>
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<pre style="margin: 0;"> <span id="LC333" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18355</span><span class="p">',</span> <span class="p">[</span> <span class="nv" style="color: #008080;">grep_errmsg</span><span class="p">(</span><span class="nv" style="color: #008080;">r</span><span class="p">'</span><span class="s1" style="color: #d14;">OneShot</span><span class="p">')</span> <span class="p">],</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">-O -ddump-simpl -dsuppress-uniques</span><span class="p">'])</span></span>
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<pre style="margin: 0;"> <span id="LC334" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18399</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">-dcore-lint -O</span><span class="p">'])</span></span>
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<pre style="margin: 0;"> <span id="LC335" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18589</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">-dcore-lint -O</span><span class="p">'])</span></span>
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<pre style="margin: 0;">+<span id="LC336" class="line" lang="perl"></span>
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<pre style="margin: 0;">+<span id="LC337" class="line" lang="perl"><span class="c1" style="color: #998; font-style: italic;"># T18649 should /not/ generate a specialisation rule</span></span>
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<pre style="margin: 0;">+<span id="LC338" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18649</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">-O -ddump-rules -Wno-simplifiable-class-constraints</span><span class="p">'])</span></span>
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<pre style="margin: 0;">+<span id="LC339" class="line" lang="perl"></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#6f33783c8d13aee2994cdd57addf2f97a4f8b849"><strong>testsuite/tests/typecheck/should_run/T18627.hs</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE DataKinds #-}</span></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE ImplicitParams #-}</span></span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE MultiParamTypeClasses #-}</span></span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">Main</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Classes</span></span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">IP</span> <span class="s" style="color: #d14;">"x"</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="kr" style="font-weight: 600;">where</span></span>
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9
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"> <span class="n" style="color: #333;">ip</span> <span class="o" style="font-weight: 600;">=</span> <span class="mi" style="color: #099;">21</span></span>
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10
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="n" style="color: #333;">baz</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="o" style="font-weight: 600;">?</span><span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">Int</span></span>
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"><span class="n" style="color: #333;">baz</span> <span class="o" style="font-weight: 600;">=</span> <span class="o" style="font-weight: 600;">?</span><span class="n" style="color: #333;">x</span></span>
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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"><span class="n" style="color: #333;">main</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"><span class="n" style="color: #333;">main</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">let</span> <span class="o" style="font-weight: 600;">?</span><span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="mi" style="color: #099;">42</span></span>
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16
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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">in</span> <span class="n" style="color: #333;">print</span> <span class="n" style="color: #333;">baz</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#25acb6208a3348d849f692d01e26d759ac4e8979"><strong>testsuite/tests/typecheck/should_run/T18627.stdout</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="plaintext">42</span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/dda2198a16ee9abafbd56571c90603f87bef81cf...ac3f506ade42880089957bf5c3ec2e5154d037c6#8db0e99055bd439c988ea726deb76570d8736a55"><strong>testsuite/tests/typecheck/should_run/all.T</strong></a>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="146" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -146,3 +146,4 @@ test('UnliftedNewtypesDependentFamilyRun', normal, compile_and_run, [''])</td>
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146
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146
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<pre style="margin: 0;"> <span id="LC146" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">UnliftedNewtypesIdentityRun</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[''])</span></span>
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147
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147
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<pre style="margin: 0;"> <span id="LC147" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">UnliftedNewtypesCoerceRun</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[''])</span></span>
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148
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<pre style="margin: 0;"> <span id="LC148" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T17104</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[''])</span></span>
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149
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<pre style="margin: 0;">+<span id="LC149" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18627</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">-O</span><span class="p">'])</span> <span class="c1" style="color: #998; font-style: italic;"># Optimisation shows up the bug</span></span></pre>
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