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<h3>
Marge Bot pushed to branch master
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
</h4>
<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/518a63d4d7e31e49a81ad66d5e5ccb1f790f6de9">518a63d4</a></strong>
<div>
<span>by Ryan Scott</span>
<i>at 2020-04-28T15:40:42-04:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Make boxed 1-tuples have known keys
Unlike other tuples, which use special syntax and are "known" by way
of a special `isBuiltInOcc_maybe` code path, boxed 1-tuples do not
use special syntax. Therefore, in order to make sure that the
internals of GHC are aware of the `data Unit a = Unit a` definition
in `GHC.Tuple`, we give `Unit` known keys. For the full details, see
`Note [One-tuples] (Wrinkle: Make boxed one-tuple names have known keys)`
in `GHC.Builtin.Types`.
Fixes #18097.
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<h4>7 changed files:</h4>
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<li class="file-stats">
<a href="#0887cf39c5cdf9cf8d6758f410d7dab3023c0d77">
compiler/GHC/Builtin/Names.hs
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<li class="file-stats">
<a href="#377cfd14c1f92357465df995ec6537b074051322">
compiler/GHC/Builtin/Types.hs
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<li class="file-stats">
<a href="#d95fdf6575459444666f72b2281534e0558a4ba0">
compiler/GHC/Builtin/Utils.hs
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<li class="file-stats">
<a href="#32662eceac6f3bf0abadf4ccb10c63b450a06a18">
<span class="new-file">
+
testsuite/tests/th/T18097.hs
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<a href="#6f885f60b8c0fea6b94dd73a67d02212eedb4498">
testsuite/tests/th/all.T
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<li class="file-stats">
<a href="#de0e277054ac3da71693dfcea757039d76fad050">
testsuite/tests/typecheck/should_compile/holes.stderr
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<li class="file-stats">
<a href="#1d683ed27aeeae0d8cd1dd536f95884ef5da3f15">
testsuite/tests/typecheck/should_compile/holes3.stderr
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<h4>Changes:</h4>
<li id="0887cf39c5cdf9cf8d6758f410d7dab3023c0d77">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/518a63d4d7e31e49a81ad66d5e5ccb1f790f6de9#0887cf39c5cdf9cf8d6758f410d7dab3023c0d77"><strong>compiler/GHC/Builtin/Names.hs</strong></a>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="111" 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">@@ -111,6 +111,10 @@ by the user. For those things that *can* appear in source programs,</td>
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<pre style="margin: 0;"> <span id="LC111" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC112" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> See also Note [Built-in syntax and the OrigNameCache]</span></span>
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<pre style="margin: 0;"> <span id="LC113" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC114" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note that one-tuples are an exception to the rule, as they do get assigned</span></span>
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<pre style="margin: 0;">+<span id="LC115" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">known keys. See</span></span>
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<pre style="margin: 0;">+<span id="LC116" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [One-tuples] (Wrinkle: Make boxed one-tuple names have known keys)</span></span>
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<pre style="margin: 0;">+<span id="LC117" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">in GHC.Builtin.Types.</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="cm" style="color: #998; font-style: italic;">Note [The integer library]</span></span>
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<pre style="margin: 0;"> <span id="LC120" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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<li id="377cfd14c1f92357465df995ec6537b074051322">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/518a63d4d7e31e49a81ad66d5e5ccb1f790f6de9#377cfd14c1f92357465df995ec6537b074051322"><strong>compiler/GHC/Builtin/Types.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">@@ -71,7 +71,7 @@ module GHC.Builtin.Types (</td>
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<pre style="margin: 0;"> <span id="LC71" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC72" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- * Tuples</span></span>
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<pre style="margin: 0;"> <span id="LC73" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkTupleTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkTupleTy1</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkBoxedTupleTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkTupleStr</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC74" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">tupleTyCon</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tupleDataCon</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tupleTyConName</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC74" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">tupleTyCon</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tupleDataCon</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tupleTyConName</span><span class="p">,</span><span class="idiff left"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">tupleDataConName</span></span><span class="p"><span class="idiff right">,</span></span></span>
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<pre style="margin: 0;"> <span id="LC75" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">promotedTupleDataCon</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC76" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">unitTyCon</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">unitDataCon</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">unitDataConId</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">unitTy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">unitTyConKey</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC77" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">pairTyCon</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">@@ -725,9 +725,13 @@ for one-tuples. So in ghc-prim:GHC.Tuple we see the declarations:</td>
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<pre style="margin: 0;"> <span id="LC725" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> data Unit a = Unit a</span></span>
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<pre style="margin: 0;"> <span id="LC726" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> data (a,b) = (a,b)</span></span>
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<pre style="margin: 0;"> <span id="LC727" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC728" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">There is no way to write a boxed one-tuple in Haskell, but it can be</span></span>
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<pre style="margin: 0;">-<span id="LC729" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">created in Template Haskell or in, e.g., `deriving` code. There is</span></span>
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<pre style="margin: 0;">-<span id="LC730" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">nothing special about one-tuples in Core; in particular, they have no</span></span>
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<pre style="margin: 0;">+<span id="LC728" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">There is no way to write a boxed one-tuple in Haskell using tuple syntax.</span></span>
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<pre style="margin: 0;">+<span id="LC729" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">They can, however, be written using other methods:</span></span>
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<pre style="margin: 0;">+<span id="LC730" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC731" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">1. They can be written directly by importing them from GHC.Tuple.</span></span>
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<pre style="margin: 0;">+<span id="LC732" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">2. They can be generated by way of Template Haskell or in `deriving` code.</span></span>
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<pre style="margin: 0;">+<span id="LC733" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC734" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">There is nothing special about one-tuples in Core; in particular, they have no</span></span>
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731
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<pre style="margin: 0;"> <span id="LC735" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">custom pretty-printing, just using `Unit`.</span></span>
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736
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<pre style="margin: 0;"> <span id="LC736" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC737" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note that there is *not* a unary constraint tuple, unlike for other forms of</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">@@ -737,6 +741,29 @@ details.</td>
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<pre style="margin: 0;"> <span id="LC741" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">See also Note [Flattening one-tuples] in GHC.Core.Make and</span></span>
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738
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<pre style="margin: 0;"> <span id="LC742" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Don't flatten tuples from HsSyn] in GHC.Core.Make.</span></span>
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743
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<pre style="margin: 0;"> <span id="LC743" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC744" 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="LC745" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-- Wrinkle: Make boxed one-tuple names have known keys</span></span>
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<pre style="margin: 0;">+<span id="LC746" 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="LC748" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We make boxed one-tuple names have known keys so that `data Unit a = Unit a`,</span></span>
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749
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<pre style="margin: 0;">+<span id="LC749" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">defined in GHC.Tuple, will be used when one-tuples are spliced in through</span></span>
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<pre style="margin: 0;">+<span id="LC750" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Template Haskell. This program (from #18097) crucially relies on this:</span></span>
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751
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752
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<pre style="margin: 0;">+<span id="LC752" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> case $( tupE [ [| "ok" |] ] ) of Unit x -> putStrLn x</span></span>
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753
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<pre style="margin: 0;">+<span id="LC753" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC754" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Unless Unit has a known key, the type of `$( tupE [ [| "ok" |] ] )` (an</span></span>
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755
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<pre style="margin: 0;">+<span id="LC755" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">ExplicitTuple of length 1) will not match the type of Unit (an ordinary</span></span>
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756
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<pre style="margin: 0;">+<span id="LC756" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">data constructor used in a pattern). Making Unit known-key allows GHC to make</span></span>
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757
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<pre style="margin: 0;">+<span id="LC757" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">this connection.</span></span>
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758
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<pre style="margin: 0;">+<span id="LC758" class="line" lang="haskell"></span>
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759
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<pre style="margin: 0;">+<span id="LC759" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Unlike Unit, every other tuple is /not/ known-key</span></span>
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760
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<pre style="margin: 0;">+<span id="LC760" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">(see Note [Infinite families of known-key names] in GHC.Builtin.Names). The</span></span>
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761
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<pre style="margin: 0;">+<span id="LC761" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">main reason for this exception is that other tuples are written with special</span></span>
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762
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<pre style="margin: 0;">+<span id="LC762" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">syntax, and as a result, they are renamed using a special `isBuiltInOcc_maybe`</span></span>
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763
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<pre style="margin: 0;">+<span id="LC763" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">function (see Note [Built-in syntax and the OrigNameCache] in GHC.Types.Name.Cache).</span></span>
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764
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<pre style="margin: 0;">+<span id="LC764" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">In contrast, Unit is just an ordinary data type with no special syntax, so it</span></span>
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765
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<pre style="margin: 0;">+<span id="LC765" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">doesn't really make sense to handle it in `isBuiltInOcc_maybe`. Making Unit</span></span>
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766
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<pre style="margin: 0;">+<span id="LC766" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">known-key is the next-best way to teach the internals of the compiler about it.</span></span>
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740
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767
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<pre style="margin: 0;"> <span id="LC767" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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741
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768
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<pre style="margin: 0;"> <span id="LC768" class="line" lang="haskell"></span>
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742
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769
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<pre style="margin: 0;"> <span id="LC769" class="line" lang="haskell"><span class="cd">-- | Built-in syntax isn't "in scope" so these OccNames map to wired-in Names</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">@@ -760,6 +787,8 @@ isBuiltInOcc_maybe occ =</td>
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760
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787
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<pre style="margin: 0;"> <span id="LC787" class="line" lang="haskell"> <span class="s" style="color: #d14;">"->"</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;">funTyConName</span></span>
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<pre style="margin: 0;"> <span id="LC788" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC789" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- boxed tuple data/tycon</span></span>
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<pre style="margin: 0;">+<span id="LC790" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We deliberately exclude Unit (the boxed 1-tuple).</span></span>
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<pre style="margin: 0;">+<span id="LC791" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [One-tuples] (Wrinkle: Make boxed one-tuple names have known keys)</span></span>
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<pre style="margin: 0;"> <span id="LC792" class="line" lang="haskell"> <span class="s" style="color: #d14;">"()"</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">tup_name</span> <span class="kt" style="color: #458; font-weight: 600;">Boxed</span> <span class="mi" style="color: #099;">0</span></span>
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793
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<pre style="margin: 0;"> <span id="LC793" 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;">Just</span> <span class="n" style="color: #333;">rest</span> <span class="o" style="font-weight: 600;"><-</span> <span class="s" style="color: #d14;">"("</span> <span class="p">`</span><span class="kt" style="color: #458; font-weight: 600;">BS</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">stripPrefix</span><span class="p">`</span> <span class="n" style="color: #333;">name</span></span>
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794
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<pre style="margin: 0;"> <span id="LC794" class="line" lang="haskell"> <span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">commas</span><span class="p">,</span> <span class="n" style="color: #333;">rest'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="kt" style="color: #458; font-weight: 600;">BS</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">span</span> <span class="p">(</span><span class="o" style="font-weight: 600;">==</span><span class="sc" style="color: #d14;">','</span><span class="p">)</span> <span class="n" style="color: #333;">rest</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">@@ -889,6 +918,9 @@ tupleDataCon sort i | i > mAX_TUPLE_SIZE = snd (mk_tuple sort i) -- Build one</td>
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<pre style="margin: 0;"> <span id="LC918" class="line" lang="haskell"><span class="n" style="color: #333;">tupleDataCon</span> <span class="kt" style="color: #458; font-weight: 600;">Boxed</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">snd</span> <span class="p">(</span><span class="n" style="color: #333;">boxedTupleArr</span> <span class="o" style="font-weight: 600;">!</span> <span class="n" style="color: #333;">i</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC919" class="line" lang="haskell"><span class="n" style="color: #333;">tupleDataCon</span> <span class="kt" style="color: #458; font-weight: 600;">Unboxed</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">snd</span> <span class="p">(</span><span class="n" style="color: #333;">unboxedTupleArr</span> <span class="o" style="font-weight: 600;">!</span> <span class="n" style="color: #333;">i</span><span class="p">)</span></span>
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920
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<pre style="margin: 0;"> <span id="LC920" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC921" class="line" lang="haskell"><span class="n" style="color: #333;">tupleDataConName</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Boxity</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Arity</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Name</span></span>
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<pre style="margin: 0;">+<span id="LC922" class="line" lang="haskell"><span class="n" style="color: #333;">tupleDataConName</span> <span class="n" style="color: #333;">sort</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dataConName</span> <span class="p">(</span><span class="n" style="color: #333;">tupleDataCon</span> <span class="n" style="color: #333;">sort</span> <span class="n" style="color: #333;">i</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC923" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC924" class="line" lang="haskell"><span class="n" style="color: #333;">boxedTupleArr</span><span class="p">,</span> <span class="n" style="color: #333;">unboxedTupleArr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Array</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TyCon</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">DataCon</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC925" class="line" lang="haskell"><span class="n" style="color: #333;">boxedTupleArr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">listArray</span> <span class="p">(</span><span class="mi" style="color: #099;">0</span><span class="p">,</span><span class="n" style="color: #333;">mAX_TUPLE_SIZE</span><span class="p">)</span> <span class="p">[</span><span class="n" style="color: #333;">mk_tuple</span> <span class="kt" style="color: #458; font-weight: 600;">Boxed</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;"><-</span> <span class="p">[</span><span class="mi" style="color: #099;">0</span><span class="o" style="font-weight: 600;">..</span><span class="n" style="color: #333;">mAX_TUPLE_SIZE</span><span class="p">]]</span></span>
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<pre style="margin: 0;"> <span id="LC926" class="line" lang="haskell"><span class="n" style="color: #333;">unboxedTupleArr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">listArray</span> <span class="p">(</span><span class="mi" style="color: #099;">0</span><span class="p">,</span><span class="n" style="color: #333;">mAX_TUPLE_SIZE</span><span class="p">)</span> <span class="p">[</span><span class="n" style="color: #333;">mk_tuple</span> <span class="kt" style="color: #458; font-weight: 600;">Unboxed</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;"><-</span> <span class="p">[</span><span class="mi" style="color: #099;">0</span><span class="o" style="font-weight: 600;">..</span><span class="n" style="color: #333;">mAX_TUPLE_SIZE</span><span class="p">]]</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/518a63d4d7e31e49a81ad66d5e5ccb1f790f6de9#d95fdf6575459444666f72b2281534e0558a4ba0"><strong>compiler/GHC/Builtin/Utils.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">@@ -59,6 +59,7 @@ import GHC.Core.Opt.ConstantFold</td>
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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.Types.Avail</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.Builtin.PrimOps</span></span>
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<pre style="margin: 0;"> <span id="LC61" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.DataCon</span></span>
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<pre style="margin: 0;">+<span id="LC62" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Basic</span></span>
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<pre style="margin: 0;"> <span id="LC63" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Id</span></span>
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<pre style="margin: 0;"> <span id="LC64" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Name</span></span>
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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.Types.Name.Env</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">@@ -124,14 +125,17 @@ knownKeyNames</td>
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<pre style="margin: 0;"> <span id="LC125" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">all_names</span></span>
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<pre style="margin: 0;"> <span id="LC126" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC127" class="line" lang="haskell"> <span class="n" style="color: #333;">all_names</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">+<span id="LC128" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We exclude most tuples from this list—see</span></span>
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<pre style="margin: 0;">+<span id="LC129" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Note [Infinite families of known-key names] in GHC.Builtin.Names.</span></span>
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<pre style="margin: 0;">+<span id="LC130" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We make an exception for Unit (i.e., the boxed 1-tuple), since it does</span></span>
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<pre style="margin: 0;">+<span id="LC131" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- not use special syntax like other tuples.</span></span>
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<pre style="margin: 0;">+<span id="LC132" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [One-tuples] (Wrinkle: Make boxed one-tuple names have known keys)</span></span>
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<pre style="margin: 0;">+<span id="LC133" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- in GHC.Builtin.Types.</span></span>
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<pre style="margin: 0;">+<span id="LC134" class="line" lang="haskell"> <span class="n" style="color: #333;">tupleTyConName</span> <span class="kt" style="color: #458; font-weight: 600;">BoxedTuple</span> <span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">tupleDataConName</span> <span class="kt" style="color: #458; font-weight: 600;">Boxed</span> <span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">:</span></span>
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<pre style="margin: 0;"> <span id="LC135" class="line" lang="haskell"> <span class="n" style="color: #333;">concat</span> <span class="p">[</span> <span class="n" style="color: #333;">wired_tycon_kk_names</span> <span class="n" style="color: #333;">funTyCon</span></span>
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<pre style="margin: 0;"> <span id="LC136" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">concatMap</span> <span class="n" style="color: #333;">wired_tycon_kk_names</span> <span class="n" style="color: #333;">primTyCons</span></span>
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<pre style="margin: 0;">-<span id="LC129" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC137" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">concatMap</span> <span class="n" style="color: #333;">wired_tycon_kk_names</span> <span class="n" style="color: #333;">wiredInTyCons</span></span>
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<pre style="margin: 0;">-<span id="LC131" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Does not include tuples</span></span>
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<pre style="margin: 0;">-<span id="LC132" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC138" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">concatMap</span> <span class="n" style="color: #333;">wired_tycon_kk_names</span> <span class="n" style="color: #333;">typeNatTyCons</span></span>
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<pre style="margin: 0;">-<span id="LC134" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC139" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">idName</span> <span class="n" style="color: #333;">wiredInIds</span></span>
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<pre style="margin: 0;"> <span id="LC140" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">map</span> <span class="p">(</span><span class="n" style="color: #333;">idName</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">primOpId</span><span class="p">)</span> <span class="n" style="color: #333;">allThePrimOps</span></span>
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<pre style="margin: 0;"> <span id="LC141" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">map</span> <span class="p">(</span><span class="n" style="color: #333;">idName</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">primOpWrapperId</span><span class="p">)</span> <span class="n" style="color: #333;">allThePrimOps</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/518a63d4d7e31e49a81ad66d5e5ccb1f790f6de9#32662eceac6f3bf0abadf4ccb10c63b450a06a18"><strong>testsuite/tests/th/T18097.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 TemplateHaskell #-}</span></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">T18097</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Language.Haskell.TH</span></span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tuple</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="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="o" style="font-weight: 600;">$</span><span class="p">(</span> <span class="n" style="color: #333;">tupE</span> <span class="p">[</span> <span class="p">[</span><span class="o" style="font-weight: 600;">|</span> <span class="s" style="color: #d14;">"ok"</span> <span class="o" style="font-weight: 600;">|</span><span class="p">]</span> <span class="p">]</span> <span class="p">)</span> <span class="kr" style="font-weight: 600;">of</span> <span class="kt" style="color: #458; font-weight: 600;">Unit</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">putStrLn</span> <span class="n" style="color: #333;">x</span></span>
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="n" style="color: #333;">g</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="kt" style="color: #458; font-weight: 600;">Unit</span> <span class="s" style="color: #d14;">"ok"</span> <span class="kr" style="font-weight: 600;">of</span> <span class="o" style="font-weight: 600;">$</span><span class="p">(</span> <span class="n" style="color: #333;">tupP</span> <span class="p">[</span> <span class="o" style="font-weight: 600;">[</span><span class="n" style="color: #333;">p</span><span class="o" style="font-weight: 600;">|</span> x <span class="o" style="font-weight: 600;">|]</span> <span class="p">]</span> <span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">putStrLn</span> <span class="n" style="color: #333;">x</span></span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"><span class="n" style="color: #333;">h</span> <span class="o" style="font-weight: 600;">::</span> <span class="o" style="font-weight: 600;">$</span><span class="p">(</span> <span class="n" style="color: #333;">tupleT</span> <span class="mi" style="color: #099;">1</span> <span class="p">)</span> <span class="kt" style="color: #458; font-weight: 600;">String</span></span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="n" style="color: #333;">h</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Unit</span> <span class="s" style="color: #d14;">"ok"</span></span>
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"><span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Unit</span> <span class="kt" style="color: #458; font-weight: 600;">String</span></span>
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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"><span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">=</span> <span class="o" style="font-weight: 600;">$</span><span class="p">(</span> <span class="n" style="color: #333;">tupE</span> <span class="p">[</span> <span class="p">[</span><span class="o" style="font-weight: 600;">|</span> <span class="s" style="color: #d14;">"ok"</span> <span class="o" style="font-weight: 600;">|</span><span class="p">]</span> <span class="p">]</span> <span class="p">)</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/518a63d4d7e31e49a81ad66d5e5ccb1f790f6de9#6f885f60b8c0fea6b94dd73a67d02212eedb4498"><strong>testsuite/tests/th/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">@@ -502,6 +502,7 @@ test('T17511', normal, compile, [''])</td>
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<pre style="margin: 0;"> <span id="LC502" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T17608</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;">-v0 -ddump-splices -dsuppress-uniques</span><span class="p">'])</span></span>
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503
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<pre style="margin: 0;"> <span id="LC503" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T17688a</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>
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504
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504
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<pre style="margin: 0;"> <span id="LC504" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T17688b</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>
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<pre style="margin: 0;">+<span id="LC505" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18097</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>
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506
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<pre style="margin: 0;"> <span id="LC506" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">TH_PprStar</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;">-v0 -dsuppress-uniques</span><span class="p">'])</span></span>
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506
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507
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<pre style="margin: 0;"> <span id="LC507" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">TH_StringLift</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>
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507
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508
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<pre style="margin: 0;"> <span id="LC508" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">TH_BytesShowEqOrd</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></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/518a63d4d7e31e49a81ad66d5e5ccb1f790f6de9#de0e277054ac3da71693dfcea757039d76fad050"><strong>testsuite/tests/typecheck/should_compile/holes.stderr</strong></a>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="90" 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="diff-line-num unfold js-unfold new_line" data-linenumber="90" 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">@@ -90,6 +90,7 @@ holes.hs:11:15: warning: [-Wtyped-holes (in -Wdefault)]</td>
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90
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90
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<pre style="margin: 0;"> <span id="LC90" class="line" lang="plaintext"> Nothing :: forall a. Maybe a</span>
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91
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91
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<pre style="margin: 0;"> <span id="LC91" class="line" lang="plaintext"> Just :: forall a. a -> Maybe a</span>
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92
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<pre style="margin: 0;"> <span id="LC92" class="line" lang="plaintext"> [] :: forall a. [a]</span>
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93
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<pre style="margin: 0;">+<span id="LC93" class="line" lang="plaintext"> Unit :: forall a. a -> Unit a</span>
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94
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<pre style="margin: 0;"> <span id="LC94" class="line" lang="plaintext"> asTypeOf :: forall a. a -> a -> a</span>
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95
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<pre style="margin: 0;"> <span id="LC95" class="line" lang="plaintext"> id :: forall a. a -> a</span>
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96
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<pre style="margin: 0;"> <span id="LC96" class="line" lang="plaintext"> until :: forall a. (a -> Bool) -> (a -> a) -> a -> a</span>
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<li id="1d683ed27aeeae0d8cd1dd536f95884ef5da3f15">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/518a63d4d7e31e49a81ad66d5e5ccb1f790f6de9#1d683ed27aeeae0d8cd1dd536f95884ef5da3f15"><strong>testsuite/tests/typecheck/should_compile/holes3.stderr</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">@@ -93,6 +93,7 @@ holes3.hs:11:15: error:</td>
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93
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<pre style="margin: 0;"> <span id="LC93" class="line" lang="plaintext"> Nothing :: forall a. Maybe a</span>
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94
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<pre style="margin: 0;"> <span id="LC94" class="line" lang="plaintext"> Just :: forall a. a -> Maybe a</span>
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<pre style="margin: 0;"> <span id="LC95" class="line" lang="plaintext"> [] :: forall a. [a]</span>
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<pre style="margin: 0;">+<span id="LC96" class="line" lang="plaintext"> Unit :: forall a. a -> Unit a</span>
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97
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<pre style="margin: 0;"> <span id="LC97" class="line" lang="plaintext"> asTypeOf :: forall a. a -> a -> a</span>
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98
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<pre style="margin: 0;"> <span id="LC98" class="line" lang="plaintext"> id :: forall a. a -> a</span>
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98
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99
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<pre style="margin: 0;"> <span id="LC99" class="line" lang="plaintext"> until :: forall a. (a -> Bool) -> (a -> a) -> a -> a</span>
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