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<h3>
Simon Peyton Jones pushed to branch wip/T18126-deep
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
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<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eae80258c718ee303910818acf715e78a98a7f59">eae80258</a></strong>
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<span>by Simon Peyton Jones</span>
<i>at 2020-05-29T10:03:40+01:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Wibbles
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<h4>5 changed files:</h4>
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<li class="file-stats">
<a href="#6a1f039ed7725eddef15dd5f4dc318a3434f26c9">
compiler/GHC/Tc/Gen/App.hs
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<li class="file-stats">
<a href="#902811828741e6bcd64702935bbb54edbbd070ef">
compiler/GHC/Tc/Gen/Expr.hs
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<li class="file-stats">
<a href="#74295edeac870ee7f2f3484ebaffab5c948b735a">
compiler/GHC/Tc/Utils/Unify.hs
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<li class="file-stats">
<a href="#ff2cc6d26d8fa6a7c9a4f742835d78733da57656">
testsuite/tests/impredicative/icfp20-ok.hs
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<li class="file-stats">
<a href="#8b444fd335d9ab139a61bae54502166f4b7f6847">
testsuite/tests/typecheck/should_fail/tcfail133.stderr
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<h4>Changes:</h4>
<li id="6a1f039ed7725eddef15dd5f4dc318a3434f26c9">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eae80258c718ee303910818acf715e78a98a7f59#6a1f039ed7725eddef15dd5f4dc318a3434f26c9"><strong>compiler/GHC/Tc/Gen/App.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">@@ -2,12 +2,11 @@</td>
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<pre style="margin: 0;"> <span id="LC2" 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="LC3" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">(c) The University of Glasgow 2006</span></span>
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<pre style="margin: 0;"> <span id="LC4" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">(c) The GRASP/AQUA Project, Glasgow University, 1992-1998</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="LC5" 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="LC6" class="line" lang="haskell"></span>
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<td class="diff-line-num old_line" data-linenumber="8" 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">
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<pre style="margin: 0;"> <span id="LC7" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE CPP, TupleSections, ScopedTypeVariables #-}</span></span>
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<pre style="margin: 0;"> <span id="LC8" 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="LC10" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE TypeFamilies, DataKinds, TypeApplications #-}</span></span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE TypeFamilies, DataKinds, <span class="idiff left right">GADTs, </span>TypeApplications #-}</span></span>
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<pre style="margin: 0;"> <span id="LC10" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE UndecidableInstances #-}</span> <span class="c1" style="color: #998; font-style: italic;">-- Wrinkle in Note [Trees That Grow]</span></span>
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<pre style="margin: 0;"> <span id="LC11" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC12" 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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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="25" 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="24" 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">@@ -25,8 +24,7 @@ module GHC.Tc.Gen.App</td>
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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="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">addExprCtxt</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="LC26" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC28" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="err" style="color: #a61717; background-color: #e3d2d2;">{-#</span> <span class="nn" style="color: #555;">SOURCE</span> <span class="o" style="font-weight: 600;">#-</span><span class="p">}</span> <span class="kt" style="color: #458; font-weight: 600;">GHC</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Tc</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Gen</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Expr</span><span class="p">(</span> <span class="n" style="color: #333;">tcExpr</span><span class="p">,</span> <span class="n" style="color: #333;">tcCheckPolyExprNC</span></span>
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<pre style="margin: 0;">-<span id="LC29" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">tcInferRhoNC</span><span class="p">,</span> <span class="n" style="color: #333;">tcExprWithSig</span> <span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC27" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="err" style="color: #a61717; background-color: #e3d2d2;">{-#</span> <span class="nn" style="color: #555;">SOURCE</span> <span class="o" style="font-weight: 600;">#-</span><span class="p">}</span> <span class="kt" style="color: #458; font-weight: 600;">GHC</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Tc</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Gen</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Expr</span><span class="p">(</span> <span class="n" style="color: #333;">tcExpr</span><span class="p">,</span> <span class="n" style="color: #333;">tcCheckPolyExprNC</span><span class="p">,</span> <span class="n" style="color: #333;">tcExprWithSig</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC28" class="line" lang="haskell"></span>
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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.Hs</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.Tc.TyCl.PatSyn</span><span class="p">(</span> <span class="n" style="color: #333;">patSynBuilderOcc</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">@@ -155,9 +153,10 @@ data TcPass = TcpRn -- Arguments decomposed</td>
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<pre style="margin: 0;"> <span id="LC153" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">TcpTc</span> <span class="c1" style="color: #998; font-style: italic;">-- Typechecked</span></span>
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<pre style="margin: 0;"> <span id="LC154" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC155" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">HsExprArg</span> <span class="p">(</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;">TcPass</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC158" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="kt" style="color: #458; font-weight: 600;">SrcSpan</span> <span class="c1" style="color: #998; font-style: italic;">-- Of the function</span></span>
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<pre style="margin: 0;">-<span id="LC159" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="n" style="color: #333;">p</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC160" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">!</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XEType</span> <span class="n" style="color: #333;">p</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC156" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="p">{</span> <span class="n" style="color: #333;">eva_loc</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SrcSpan</span> <span class="c1" style="color: #998; font-style: italic;">-- Of the function</span></span>
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<pre style="margin: 0;">+<span id="LC157" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">eva_arg</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="n" style="color: #333;">p</span></span>
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<pre style="margin: 0;">+<span id="LC158" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">eva_ty</span> <span class="o" style="font-weight: 600;">::</span> <span class="o" style="font-weight: 600;">!</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XEType</span> <span class="n" style="color: #333;">p</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC159" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">eva_gd</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC160" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC161" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">ETypeArg</span> <span class="kt" style="color: #458; font-weight: 600;">SrcSpan</span> <span class="c1" style="color: #998; font-style: italic;">-- Of the function</span></span>
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<pre style="margin: 0;"> <span id="LC162" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LHsWcType</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</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">@@ -170,12 +169,18 @@ data HsExprArg (p :: TcPass)</td>
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<pre style="margin: 0;"> <span id="LC169" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC170" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">EWrap</span> <span class="o" style="font-weight: 600;">!</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XEWrap</span> <span class="n" style="color: #333;">p</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- Wrapper, after instantiation</span></span>
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<pre style="margin: 0;"> <span id="LC171" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC173" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="p">(</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;">TcPass</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC174" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ValArg</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LHsExpr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XPass</span> <span class="n" style="color: #333;">p</span><span class="p">)))</span></span>
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175
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<pre style="margin: 0;">-<span id="LC175" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">ValArgQL</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;">HsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span><span class="p">)</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HsExprArg</span> <span class="n" style="color: #333;">p</span><span class="p">]</span> <span class="kt" style="color: #458; font-weight: 600;">TcRhoType</span> <span class="kt" style="color: #458; font-weight: 600;">Rebuilder</span></span>
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172
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<pre style="margin: 0;">+<span id="LC172" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="p">(</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;">TcPass</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>
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173
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<pre style="margin: 0;">+<span id="LC173" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ValArg</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LHsExpr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XPass</span> <span class="n" style="color: #333;">p</span><span class="p">))</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="n" style="color: #333;">p</span></span>
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174
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<pre style="margin: 0;">+<span id="LC174" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ValArgQL</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">{</span> <span class="n" style="color: #333;">va_loc</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SrcSpan</span></span>
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175
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<pre style="margin: 0;">+<span id="LC175" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">va_fun</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="c1" style="color: #998; font-style: italic;">-- Function, typechecked</span></span>
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176
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<pre style="margin: 0;">+<span id="LC176" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">va_args</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HsExprArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpInst</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Args, instantiated</span></span>
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177
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<pre style="margin: 0;">+<span id="LC177" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">va_ty</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TcRhoType</span> <span class="c1" style="color: #998; font-style: italic;">-- Result type</span></span>
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178
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<pre style="margin: 0;">+<span id="LC178" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">va_rebuild</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Rebuilder</span> <span class="p">}</span> <span class="c1" style="color: #998; font-style: italic;">-- How to reassemble</span></span>
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<pre style="margin: 0;">+<span id="LC179" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpInst</span> <span class="c1" style="color: #998; font-style: italic;">-- Only exists in TcpInst phase</span></span>
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176
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180
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<pre style="margin: 0;"> <span id="LC180" class="line" lang="haskell"></span>
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177
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<pre style="margin: 0;"> <span id="LC181" class="line" lang="haskell"><span class="n" style="color: #333;">mkEValArg</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SrcSpan</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LHsExpr</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;">HsExprArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpRn</span></span>
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178
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<pre style="margin: 0;">-<span id="LC178" class="line" lang="haskell"><span class="n" style="color: #333;">mkEValArg</span> <span class="n" style="color: #333;">l</span> <span class="n" style="color: #333;">e</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ValArg</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="n" style="color: #333;">noExtField</span></span>
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182
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<pre style="margin: 0;">+<span id="LC182" class="line" lang="haskell"><span class="n" style="color: #333;">mkEValArg</span> <span class="n" style="color: #333;">l</span> <span class="n" style="color: #333;">e</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="p">{</span> <span class="n" style="color: #333;">eva_loc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">l</span><span class="p">,</span> <span class="n" style="color: #333;">eva_arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ValArg</span> <span class="n" style="color: #333;">e</span></span>
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183
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<pre style="margin: 0;">+<span id="LC183" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">eva_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">noExtField</span><span class="p">,</span> <span class="n" style="color: #333;">eva_gd</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="p">}</span></span>
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179
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184
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<pre style="margin: 0;"> <span id="LC184" class="line" lang="haskell"></span>
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180
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185
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<pre style="margin: 0;"> <span id="LC185" 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;">XPass</span> <span class="n" style="color: #333;">p</span> <span class="kr" style="font-weight: 600;">where</span></span>
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181
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<pre style="margin: 0;"> <span id="LC186" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">XPass</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpRn</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">'Renamed</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">@@ -191,7 +196,9 @@ type family XEWrap p where</td>
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191
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196
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<pre style="margin: 0;"> <span id="LC196" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">XEWrap</span> <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;">HsWrapper</span></span>
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192
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197
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<pre style="margin: 0;"> <span id="LC197" class="line" lang="haskell"></span>
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193
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198
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<pre style="margin: 0;"> <span id="LC198" 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="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XPass</span> <span class="n" style="color: #333;">p</span><span class="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;">HsExprArg</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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194
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<pre style="margin: 0;">-<span id="LC194" 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;">EValArg</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">tm</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"EValArg"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">tm</span></span>
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<td class="diff-line-num new new_line" data-linenumber="199" 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">
199
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<pre style="margin: 0;">+<span id="LC199" 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;">EValArg</span> <span class="p">{</span> <span class="n" style="color: #333;">eva_arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">arg</span><span class="p">,</span> <span class="n" style="color: #333;">eva_gd</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">gd</span> <span class="p">})</span></span>
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<td class="diff-line-num new new_line" data-linenumber="200" 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">
200
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<pre style="margin: 0;">+<span id="LC200" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"EValArg"</span> <span class="o" style="font-weight: 600;"><></span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">gd</span> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"(gd)"</span> <span class="kr" style="font-weight: 600;">else</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"(un-gd)"</span></span>
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<td class="diff-line-num new new_line" data-linenumber="201" 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">
201
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<pre style="margin: 0;">+<span id="LC201" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">arg</span></span>
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195
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<td class="diff-line-num new_line" data-linenumber="202" 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">
202
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<pre style="margin: 0;"> <span id="LC202" 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;">EPrag</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">p</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"EPrag"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">p</span></span>
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196
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203
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<pre style="margin: 0;"> <span id="LC203" 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;">ETypeArg</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">hs_ty</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">char</span> <span class="sc" style="color: #d14;">'@'</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">hs_ty</span></span>
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197
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204
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<pre style="margin: 0;"> <span id="LC204" 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;">EPar</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"EPar"</span></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="207" 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">@@ -200,13 +207,14 @@ instance OutputableBndrId (XPass p) => Outputable (HsExprArg p) where</td>
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200
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207
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<pre style="margin: 0;"> <span id="LC207" class="line" lang="haskell"></span>
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201
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208
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<pre style="margin: 0;"> <span id="LC208" 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="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XPass</span> <span class="n" style="color: #333;">p</span><span class="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;">EValArg</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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202
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209
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<pre style="margin: 0;"> <span id="LC209" 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;">ValArg</span> <span class="n" style="color: #333;">e</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;">e</span></span>
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203
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<pre style="margin: 0;">-<span id="LC203" 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;">ValArgQL</span> <span class="kr" style="font-weight: 600;"><span class="idiff left">_</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fun</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">args</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ty</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</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">hang</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">text</span></span><span class="idiff"> </span><span class="s" style="color: #d14;"><span class="idiff">"ValArgQL"</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">ppr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">fun</span></span><span class="p">)</span></span>
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204
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<pre style="margin: 0;">-<span id="LC204" class="line" lang="haskell"> <span class="idiff left"> </span><span class="mi" style="color: #099;"><span class="idiff">2</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">vcat</span></span><span class="idiff"> </span><span class="p"><span class="idiff">[</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ppr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">args</span></span></span>
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205
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<pre style="margin: 0;">-<span id="LC205" class="line" lang="haskell"> <span class="idiff left"> </span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">text</span></span><span class="idiff"> </span><span class="s" style="color: #d14;"><span class="idiff right">"app</span>_ty:"</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 class="p">])</span></span>
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<pre style="margin: 0;">+<span id="LC210" 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;">ValArgQL</span> <span class="p"><span class="idiff left">{</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">va_fun</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">fun</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">va_args</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">args</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">va_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">ty</span></span><span class="p"><span class="idiff right">}</span>)</span></span>
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<pre style="margin: 0;">+<span id="LC211" class="line" lang="haskell"> <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">hang</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">text</span></span><span class="idiff"> </span><span class="s" style="color: #d14;"><span class="idiff">"ValArgQL"</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">ppr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fun</span></span><span class="p"><span class="idiff right">)</span></span></span>
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212
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<pre style="margin: 0;">+<span id="LC212" class="line" lang="haskell"> <span class="mi" style="color: #099;"><span class="idiff left">2</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">vcat</span></span><span class="idiff"> </span><span class="p"><span class="idiff">[</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ppr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">args</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">text</span></span><span class="idiff"> </span><span class="s" style="color: #d14;"><span class="idiff right">"va</span>_ty:"</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 class="p">])</span></span>
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213
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<pre style="margin: 0;"> <span id="LC213" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC214" class="line" lang="haskell"><span class="n" style="color: #333;">pprHsExprArgTc</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HsExprArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpInst</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>
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<pre style="margin: 0;">-<span id="LC208" class="line" lang="haskell"><span class="n" style="color: #333;">pprHsExprArgTc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">tm</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;">text</span> <span class="s" style="color: #d14;">"EValArg"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">hang</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">tm</span><span class="p">)</span> <span class="mi" style="color: #099;">2</span> <span class="p">(</span><span class="n" style="color: #333;">dcolon</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 class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC209" class="line" lang="haskell"><span class="n" style="color: #333;">pprHsExprArgTc</span> <span class="n" style="color: #333;">arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">arg</span></span>
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<pre style="margin: 0;">+<span id="LC215" class="line" lang="haskell"><span class="n" style="color: #333;">pprHsExprArgTc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="p">{</span> <span class="n" style="color: #333;">eva_arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tm</span><span class="p">,</span> <span class="n" style="color: #333;">eva_ty</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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<pre style="margin: 0;">+<span id="LC216" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"EValArg"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">hang</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">tm</span><span class="p">)</span> <span class="mi" style="color: #099;">2</span> <span class="p">(</span><span class="n" style="color: #333;">dcolon</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 class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC217" class="line" lang="haskell"><span class="n" style="color: #333;">pprHsExprArgTc</span> <span class="n" style="color: #333;">arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">arg</span></span>
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218
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<pre style="margin: 0;"> <span id="LC218" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC219" 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;">XExprTypeArg</span> <span class="n" style="color: #333;">id</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC220" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">XExprTypeArg</span> <span class="kt" style="color: #458; font-weight: 600;">'Parsed</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 unfold js-unfold new_line" data-linenumber="234" 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">@@ -226,8 +234,9 @@ addArgWrap wrap args</td>
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<pre style="margin: 0;"> <span id="LC234" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">Rebuilder</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">HsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HsExprArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpTc</span><span class="p">]</span><span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">HsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span></span>
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<pre style="margin: 0;"> <span id="LC235" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC236" class="line" lang="haskell"><span class="n" style="color: #333;">zonkArg</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HsExprArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpInst</span> <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;">HsExprArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpInst</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC229" class="line" lang="haskell"><span class="n" style="color: #333;">zonkArg</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="n" style="color: #333;">l</span> <span class="n" style="color: #333;">tm</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span> <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;">ty</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonkTcType</span> <span class="n" style="color: #333;">ty</span></span>
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<pre style="margin: 0;">-<span id="LC230" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="n" style="color: #333;">l</span> <span class="n" style="color: #333;">tm</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span> <span class="p">}</span></span>
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237
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<pre style="margin: 0;">+<span id="LC237" class="line" lang="haskell"><span class="n" style="color: #333;">zonkArg</span> <span class="n" style="color: #333;">eva</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="p">{</span> <span class="n" style="color: #333;">eva_ty</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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<td class="diff-line-num new new_line" data-linenumber="238" 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">
238
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<pre style="margin: 0;">+<span id="LC238" 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;">ty'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonkTcType</span> <span class="n" style="color: #333;">ty</span></span>
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239
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<pre style="margin: 0;">+<span id="LC239" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">eva</span> <span class="p">{</span> <span class="n" style="color: #333;">eva_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ty'</span> <span class="p">})</span> <span class="p">}</span></span>
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231
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240
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<pre style="margin: 0;"> <span id="LC240" class="line" lang="haskell"><span class="n" style="color: #333;">zonkArg</span> <span class="n" style="color: #333;">arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">arg</span></span>
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232
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241
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<pre style="margin: 0;"> <span id="LC241" class="line" lang="haskell"></span>
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233
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242
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<pre style="margin: 0;"> <span id="LC242" class="line" lang="haskell"><span class="n" style="color: #333;">splitHsApps</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HsExpr</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;">HsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span><span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HsExprArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpRn</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">Rebuilder</span><span class="p">)</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="249" 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="258" 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">@@ -249,7 +258,8 @@ rebuildInfixApps :: Fixity -> Rebuilder</td>
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249
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258
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<pre style="margin: 0;"> <span id="LC258" class="line" lang="haskell"><span class="n" style="color: #333;">rebuildInfixApps</span> <span class="n" style="color: #333;">fix</span> <span class="n" style="color: #333;">fun</span> <span class="n" style="color: #333;">args</span></span>
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250
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259
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<pre style="margin: 0;"> <span id="LC259" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">fun</span> <span class="n" style="color: #333;">args</span></span>
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251
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260
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<pre style="margin: 0;"> <span id="LC260" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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252
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<pre style="margin: 0;">-<span id="LC252" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">fun</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ValArg</span> <span class="n" style="color: #333;">arg1</span><span class="p">)</span> <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;">EValArg</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ValArg</span> <span class="n" style="color: #333;">arg2</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span></span>
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261
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<pre style="margin: 0;">+<span id="LC261" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">fun</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="p">{</span> <span class="n" style="color: #333;">eva_arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ValArg</span> <span class="n" style="color: #333;">arg1</span><span class="p">,</span> <span class="n" style="color: #333;">eva_loc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">l</span> <span class="p">}</span> <span class="o" style="font-weight: 600;">:</span></span>
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262
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<pre style="margin: 0;">+<span id="LC262" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="p">{</span> <span class="n" style="color: #333;">eva_arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ValArg</span> <span class="n" style="color: #333;">arg2</span> <span class="p">}</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span></span>
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253
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263
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<pre style="margin: 0;"> <span id="LC263" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rebuildPrefixApps</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">OpApp</span> <span class="n" style="color: #333;">fix</span> <span class="n" style="color: #333;">arg1</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;">fun</span><span class="p">)</span> <span class="n" style="color: #333;">arg2</span><span class="p">)</span> <span class="n" style="color: #333;">args</span></span>
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254
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264
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<pre style="margin: 0;"> <span id="LC264" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">fun</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EWrap</span> <span class="n" style="color: #333;">wrap</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">mkHsWrap</span> <span class="n" style="color: #333;">wrap</span> <span class="n" style="color: #333;">fun</span><span class="p">)</span> <span class="n" style="color: #333;">args</span></span>
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255
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<td class="diff-line-num new_line" data-linenumber="265" 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">
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<pre style="margin: 0;"> <span id="LC265" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">fun</span> <span class="n" style="color: #333;">args</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rebuildPrefixApps</span> <span class="n" style="color: #333;">fun</span> <span class="n" style="color: #333;">args</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="260" 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="270" 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">@@ -260,7 +270,8 @@ rebuildPrefixApps fun args</td>
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<pre style="margin: 0;"> <span id="LC270" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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261
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271
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<pre style="margin: 0;"> <span id="LC271" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">fun</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fun</span></span>
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262
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272
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<pre style="margin: 0;"> <span id="LC272" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">fun</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EWrap</span> <span class="n" style="color: #333;">wrap</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">mkHsWrap</span> <span class="n" style="color: #333;">wrap</span> <span class="n" style="color: #333;">fun</span><span class="p">)</span> <span class="n" style="color: #333;">args</span></span>
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263
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<pre style="margin: 0;">-<span id="LC263" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">fun</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ValArg</span> <span class="n" style="color: #333;">arg</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsApp</span> <span class="n" style="color: #333;">noExtField</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;">fun</span><span class="p">)</span> <span class="n" style="color: #333;">arg</span><span class="p">)</span> <span class="n" style="color: #333;">args</span></span>
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<pre style="margin: 0;">+<span id="LC273" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">fun</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="p">{</span> <span class="n" style="color: #333;">eva_loc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">l</span><span class="p">,</span></span>
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274
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<pre style="margin: 0;">+<span id="LC274" class="line" lang="haskell"> <span class="n" style="color: #333;">eva_arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ValArg</span> <span class="n" style="color: #333;">arg</span> <span class="p">}</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsApp</span> <span class="n" style="color: #333;">noExtField</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;">fun</span><span class="p">)</span> <span class="n" style="color: #333;">arg</span><span class="p">)</span> <span class="n" style="color: #333;">args</span></span>
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264
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275
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<pre style="margin: 0;"> <span id="LC275" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">fun</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ETypeArg</span> <span class="n" style="color: #333;">l</span> <span class="n" style="color: #333;">hs_ty</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsAppType</span> <span class="n" style="color: #333;">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;">fun</span><span class="p">)</span> <span class="n" style="color: #333;">hs_ty</span><span class="p">)</span> <span class="n" style="color: #333;">args</span></span>
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265
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276
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<pre style="margin: 0;"> <span id="LC276" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">fun</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EPar</span> <span class="n" style="color: #333;">l</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsPar</span> <span class="n" style="color: #333;">noExtField</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;">fun</span><span class="p">))</span> <span class="n" style="color: #333;">args</span></span>
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266
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277
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<pre style="margin: 0;"> <span id="LC277" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">fun</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EPrag</span> <span class="n" style="color: #333;">l</span> <span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsPragE</span> <span class="n" style="color: #333;">noExtField</span> <span class="n" style="color: #333;">p</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;">fun</span><span class="p">))</span> <span class="n" style="color: #333;">args</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="278" 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">@@ -278,13 +289,18 @@ isArgPar :: HsExprArg id -> Bool</td>
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278
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<pre style="margin: 0;"> <span id="LC289" class="line" lang="haskell"><span class="n" style="color: #333;">isArgPar</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EPar</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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279
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<pre style="margin: 0;"> <span id="LC290" class="line" lang="haskell"><span class="n" style="color: #333;">isArgPar</span> <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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280
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291
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<pre style="margin: 0;"> <span id="LC291" class="line" lang="haskell"></span>
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281
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<pre style="margin: 0;">-<span id="LC281" class="line" lang="haskell"><span class="n" style="color: #333;">getFunLoc</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HsExprArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpRn</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="kt" style="color: #458; font-weight: 600;">SrcSpan</span></span>
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282
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<pre style="margin: 0;">-<span id="LC282" class="line" lang="haskell"><span class="n" style="color: #333;">getFunLoc</span> <span class="kt" style="color: #458; 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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283
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<pre style="margin: 0;">-<span id="LC283" class="line" lang="haskell"><span class="n" style="color: #333;">getFunLoc</span> <span class="p">(</span><span class="n" style="color: #333;">a</span><span class="o" style="font-weight: 600;">:</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;">Just</span> <span class="o" style="font-weight: 600;">$</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">a</span> <span class="kr" style="font-weight: 600;">of</span></span>
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284
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<pre style="margin: 0;">-<span id="LC284" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="n" style="color: #333;">l</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">l</span></span>
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<td class="diff-line-num old old_line" data-linenumber="285" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC285" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ETypeArg</span> <span class="n" style="color: #333;">l</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">l</span></span>
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<pre style="margin: 0;">-<span id="LC286" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">EPrag</span> <span class="n" style="color: #333;">l</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">l</span></span>
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<pre style="margin: 0;">-<span id="LC287" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">EPar</span> <span class="n" style="color: #333;">l</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">l</span></span>
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<pre style="margin: 0;">+<span id="LC292" class="line" lang="haskell"><span class="n" style="color: #333;">setSrcSpanFromArgs</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HsExprArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpRn</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</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;">TcM</span> <span class="n" style="color: #333;">a</span></span>
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<pre style="margin: 0;">+<span id="LC293" class="line" lang="haskell"><span class="n" style="color: #333;">setSrcSpanFromArgs</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;">thing_inside</span></span>
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<pre style="margin: 0;">+<span id="LC294" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">thing_inside</span> <span class="c1" style="color: #998; font-style: italic;">-- Don't set the location twice</span></span>
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<pre style="margin: 0;">+<span id="LC295" class="line" lang="haskell"><span class="n" style="color: #333;">setSrcSpanFromArgs</span> <span class="p">(</span><span class="n" style="color: #333;">arg</span><span class="o" style="font-weight: 600;">:</span><span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="n" style="color: #333;">thing_inside</span></span>
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<pre style="margin: 0;">+<span id="LC296" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">setSrcSpan</span> <span class="p">(</span><span class="n" style="color: #333;">argFunLoc</span> <span class="n" style="color: #333;">arg</span><span class="p">)</span> <span class="n" style="color: #333;">thing_inside</span></span>
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<pre style="margin: 0;">+<span id="LC297" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC298" class="line" lang="haskell"><span class="n" style="color: #333;">argFunLoc</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HsExprArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SrcSpan</span></span>
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<pre style="margin: 0;">+<span id="LC299" class="line" lang="haskell"><span class="n" style="color: #333;">argFunLoc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="p">{</span> <span class="n" style="color: #333;">eva_loc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">l</span> <span class="p">})</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">l</span></span>
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<pre style="margin: 0;">+<span id="LC300" class="line" lang="haskell"><span class="n" style="color: #333;">argFunLoc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ETypeArg</span> <span class="n" style="color: #333;">l</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">l</span></span>
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<pre style="margin: 0;">+<span id="LC301" class="line" lang="haskell"><span class="n" style="color: #333;">argFunLoc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EPrag</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="n" style="color: #333;">l</span></span>
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<pre style="margin: 0;">+<span id="LC302" class="line" lang="haskell"><span class="n" style="color: #333;">argFunLoc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EPar</span> <span class="n" style="color: #333;">l</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">l</span></span>
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<pre style="margin: 0;">+<span id="LC303" class="line" lang="haskell"></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;">{- *********************************************************************</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;">* *</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">@@ -297,33 +313,23 @@ tcInferSigmaTy :: LHsExpr GhcRn -> TcM TcSigmaType</td>
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297
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<pre style="margin: 0;"> <span id="LC313" class="line" lang="haskell"><span class="n" style="color: #333;">tcInferSigmaTy</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="n" style="color: #333;">rn_expr</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC314" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="n" style="color: #333;">rn_fun</span><span class="p">,</span> <span class="n" style="color: #333;">rn_args</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">splitHsApps</span> <span class="n" style="color: #333;">rn_expr</span></span>
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315
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<pre style="margin: 0;"> <span id="LC315" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">setSrcSpan</span> <span class="n" style="color: #333;">loc</span> <span class="o" style="font-weight: 600;">$</span></span>
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300
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<pre style="margin: 0;">-<span id="LC300" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">tc_fun</span><span class="p">,</span> <span class="n" style="color: #333;">fun_sigma</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInferAppHead</span> <span class="n" style="color: #333;">rn_fun</span> <span class="n" style="color: #333;">rn_args</span></span>
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301
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<pre style="margin: 0;">-<span id="LC301" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">impred</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">xoptM</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;">ImpredicativeTypes</span></span>
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302
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<pre style="margin: 0;">-<span id="LC302" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">_delta</span><span class="p">,</span> <span class="n" style="color: #333;">inst_args</span><span class="p">,</span> <span class="n" style="color: #333;">app_res_sigma</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInstFun</span> <span class="n" style="color: #333;">impred</span> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="n" style="color: #333;">rn_fun</span> <span class="n" style="color: #333;">fun_sigma</span> <span class="n" style="color: #333;">rn_args</span></span>
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303
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<pre style="margin: 0;">-<span id="LC303" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">_tc_args</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcArgs</span> <span class="n" style="color: #333;">impred</span> <span class="n" style="color: #333;">tc_fun</span> <span class="n" style="color: #333;">inst_args</span></span>
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316
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<pre style="margin: 0;">+<span id="LC316" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">impred</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">xoptM</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;">ImpredicativeTypes</span></span>
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317
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<pre style="margin: 0;">+<span id="LC317" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">tc_fun</span><span class="p">,</span> <span class="n" style="color: #333;">fun_sigma</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInferAppHead</span> <span class="n" style="color: #333;">rn_fun</span> <span class="n" style="color: #333;">rn_args</span></span>
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<td class="diff-line-num new new_line" data-linenumber="318" 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">
318
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<pre style="margin: 0;">+<span id="LC318" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">rn_args'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">maybeAddGuardFlags</span> <span class="n" style="color: #333;">impred</span> <span class="n" style="color: #333;">fun_sigma</span> <span class="n" style="color: #333;">rn_args</span></span>
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<td class="diff-line-num new new_line" data-linenumber="319" 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">
319
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<pre style="margin: 0;">+<span id="LC319" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">_delta</span><span class="p">,</span> <span class="n" style="color: #333;">inst_args</span><span class="p">,</span> <span class="n" style="color: #333;">app_res_sigma</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInstFun</span> <span class="n" style="color: #333;">impred</span> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="n" style="color: #333;">rn_fun</span> <span class="n" style="color: #333;">fun_sigma</span> <span class="n" style="color: #333;">rn_args'</span></span>
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320
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<pre style="margin: 0;">+<span id="LC320" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">_tc_args</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcValArgs</span> <span class="n" style="color: #333;">impred</span> <span class="n" style="color: #333;">tc_fun</span> <span class="n" style="color: #333;">inst_args</span></span>
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304
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321
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<pre style="margin: 0;"> <span id="LC321" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">app_res_sigma</span> <span class="p">}</span></span>
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305
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322
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<pre style="margin: 0;"> <span id="LC322" class="line" lang="haskell"></span>
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306
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<pre style="margin: 0;">-<span id="LC306" class="line" lang="haskell"><span class="n" style="color: #333;">tcApp</span><span class="p">,</span> <span class="n" style="color: #333;">tcApp1</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HsExpr</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;">ExpRhoType</span> <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;">HsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span><span class="p">)</span></span>
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307
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<pre style="margin: 0;">-<span id="LC307" class="line" lang="haskell"><span class="n" style="color: #333;">tcApp</span> <span class="n" style="color: #333;">expr</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">OpApp</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">op</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="n" style="color: #333;">res_ty</span></span>
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308
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<pre style="margin: 0;">-<span id="LC308" class="line" lang="haskell"> <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="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsVar</span> <span class="kr" style="font-weight: 600;">_</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;">op_name</span><span class="p">)))</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">op</span></span>
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309
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<pre style="margin: 0;">-<span id="LC309" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">op_name</span> <span class="p">`</span><span class="n" style="color: #333;">hasKey</span><span class="p">`</span> <span class="n" style="color: #333;">dollarIdKey</span> <span class="c1" style="color: #998; font-style: italic;">-- Note [Typing rule for ($)]</span></span>
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310
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<pre style="margin: 0;">-<span id="LC310" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">impred</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">xoptM</span> <span class="kt" style="color: #458; font-weight: 600;">LangExt</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">ImpredicativeTypes</span></span>
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311
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<pre style="margin: 0;">-<span id="LC311" class="line" lang="haskell"></span>
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312
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<pre style="margin: 0;">-<span id="LC312" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Use old ($) rule if ImpredicativeTypes is off</span></span>
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<pre style="margin: 0;">-<span id="LC313" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">not</span> <span class="n" style="color: #333;">impred</span> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">oldTcDollar</span> <span class="n" style="color: #333;">expr</span> <span class="n" style="color: #333;">res_ty</span></span>
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<pre style="margin: 0;">-<span id="LC314" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span> <span class="n" style="color: #333;">tcApp1</span> <span class="n" style="color: #333;">expr</span> <span class="n" style="color: #333;">res_ty</span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC315" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC316" class="line" lang="haskell"><span class="n" style="color: #333;">tcApp</span> <span class="n" style="color: #333;">expr</span> <span class="n" style="color: #333;">res_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcApp1</span> <span class="n" style="color: #333;">expr</span> <span class="n" style="color: #333;">res_ty</span></span>
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<pre style="margin: 0;">-<span id="LC317" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC318" 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="LC319" class="line" lang="haskell"><span class="n" style="color: #333;">tcApp1</span> <span class="n" style="color: #333;">rn_expr</span> <span class="n" style="color: #333;">exp_res_ty</span></span>
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<pre style="margin: 0;">+<span id="LC323" class="line" lang="haskell"><span class="n" style="color: #333;">tcApp</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HsExpr</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;">ExpRhoType</span> <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;">HsExpr</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="LC324" class="line" lang="haskell"><span class="n" style="color: #333;">tcApp</span> <span class="n" style="color: #333;">rn_expr</span> <span class="n" style="color: #333;">exp_res_ty</span></span>
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<pre style="margin: 0;"> <span id="LC325" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="n" style="color: #333;">rn_fun</span><span class="p">,</span> <span class="n" style="color: #333;">rn_args</span><span class="p">,</span> <span class="n" style="color: #333;">rebuild</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">splitHsApps</span> <span class="n" style="color: #333;">rn_expr</span></span>
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<pre style="margin: 0;"> <span id="LC326" 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;">impred</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">impred_call</span> <span class="n" style="color: #333;">rn_fun</span></span>
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<pre style="margin: 0;"> <span id="LC327" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC328" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">tc_fun</span><span class="p">,</span> <span class="n" style="color: #333;">fun_sigma</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInferAppHead</span> <span class="n" style="color: #333;">rn_fun</span> <span class="n" style="color: #333;">rn_args</span></span>
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<pre style="margin: 0;"> <span id="LC329" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC330" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Instantiate</span></span>
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<pre style="margin: 0;">-<span id="LC326" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">delta</span><span class="p">,</span> <span class="n" style="color: #333;">inst_args</span><span class="p">,</span> <span class="n" style="color: #333;">app_res_rho</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInstFun</span> <span class="n" style="color: #333;">impred</span> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="n" style="color: #333;">rn_fun</span> <span class="n" style="color: #333;">fun_sigma</span> <span class="n" style="color: #333;">rn_args</span></span>
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<pre style="margin: 0;">+<span id="LC331" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">rn_args'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">maybeAddGuardFlags</span> <span class="n" style="color: #333;">impred</span> <span class="n" style="color: #333;">fun_sigma</span> <span class="n" style="color: #333;">rn_args</span></span>
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<pre style="margin: 0;">+<span id="LC332" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">delta</span><span class="p">,</span> <span class="n" style="color: #333;">inst_args</span><span class="p">,</span> <span class="n" style="color: #333;">app_res_rho</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInstFun</span> <span class="n" style="color: #333;">impred</span> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="n" style="color: #333;">rn_fun</span> <span class="n" style="color: #333;">fun_sigma</span> <span class="n" style="color: #333;">rn_args'</span></span>
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<pre style="margin: 0;"> <span id="LC333" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC334" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Quick look at result</span></span>
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<pre style="margin: 0;"> <span id="LC335" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">when</span> <span class="p">(</span><span class="n" style="color: #333;">impred</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;">isEmptyVarSet</span> <span class="n" style="color: #333;">delta</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">@@ -342,7 +348,7 @@ tcApp1 rn_expr exp_res_ty</td>
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348
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<pre style="margin: 0;"> <span id="LC348" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"rn_expr:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rn_expr</span> <span class="p">])</span></span>
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343
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349
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<pre style="margin: 0;"> <span id="LC349" class="line" lang="haskell"></span>
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344
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350
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<pre style="margin: 0;"> <span id="LC350" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Typecheck the value arguments separately</span></span>
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345
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<pre style="margin: 0;">-<span id="LC345" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">tc_args</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcArgs</span> <span class="n" style="color: #333;">impred</span> <span class="n" style="color: #333;">tc_fun</span> <span class="n" style="color: #333;">inst_args</span></span>
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351
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<pre style="margin: 0;">+<span id="LC351" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">tc_args</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tc<span class="idiff left right">Val</span>Args</span> <span class="n" style="color: #333;">impred</span> <span class="n" style="color: #333;">tc_fun</span> <span class="n" style="color: #333;">inst_args</span></span>
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346
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352
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<pre style="margin: 0;"> <span id="LC352" class="line" lang="haskell"></span>
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347
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<pre style="margin: 0;"> <span id="LC353" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Special case for tagToEnum#</span></span>
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354
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<pre style="margin: 0;"> <span id="LC354" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">isTagToEnum</span> <span class="n" style="color: #333;">rn_fun</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">@@ -384,17 +390,12 @@ tcInferAppHead :: HsExpr GhcRn</td>
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384
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<pre style="margin: 0;"> <span id="LC390" 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="LC391" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Typechecking applications]</span></span>
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386
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<pre style="margin: 0;"> <span id="LC392" class="line" lang="haskell"><span class="n" style="color: #333;">tcInferAppHead</span> <span class="n" style="color: #333;">fun</span> <span class="n" style="color: #333;">args</span></span>
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<pre style="margin: 0;">-<span id="LC387" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">set<span class="idiff left right">_fun_loc</span></span> <span class="n" style="color: #333;">args</span> <span class="o" style="font-weight: 600;">$</span></span>
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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;">set<span class="idiff left right">SrcSpanFromArgs</span></span> <span class="n" style="color: #333;">args</span> <span class="o" style="font-weight: 600;">$</span></span>
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388
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394
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<pre style="margin: 0;"> <span id="LC394" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">mb_tc_fun</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInferAppHead_maybe</span> <span class="n" style="color: #333;">fun</span> <span class="n" style="color: #333;">args</span></span>
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389
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395
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<pre style="margin: 0;"> <span id="LC395" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">mb_tc_fun</span> <span class="kr" style="font-weight: 600;">of</span></span>
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390
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396
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<pre style="margin: 0;"> <span id="LC396" 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;">fun'</span><span class="p">,</span> <span class="n" style="color: #333;">fun_sigma</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">fun'</span><span class="p">,</span> <span class="n" style="color: #333;">fun_sigma</span><span class="p">)</span></span>
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391
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397
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<pre style="margin: 0;"> <span id="LC397" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">addErrCtxt</span> <span class="p">(</span><span class="n" style="color: #333;">exprCtxt</span> <span class="n" style="color: #333;">fun</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>
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392
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398
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<pre style="margin: 0;"> <span id="LC398" class="line" lang="haskell"> <span class="n" style="color: #333;">tcInfer</span> <span class="p">(</span><span class="n" style="color: #333;">tcExpr</span> <span class="n" style="color: #333;">fun</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC393" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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394
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<pre style="margin: 0;">-<span id="LC394" class="line" lang="haskell"> <span class="n" style="color: #333;">set_fun_loc</span> <span class="n" style="color: #333;">args</span> <span class="n" style="color: #333;">thing_inside</span></span>
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<pre style="margin: 0;">-<span id="LC395" 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;">getFunLoc</span> <span class="n" style="color: #333;">args</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">-<span id="LC396" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">thing_inside</span> <span class="c1" style="color: #998; font-style: italic;">-- Don't set the location twice</span></span>
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<pre style="margin: 0;">-<span id="LC397" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">loc</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">setSrcSpan</span> <span class="n" style="color: #333;">loc</span> <span class="n" style="color: #333;">thing_inside</span></span>
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<pre style="margin: 0;"> <span id="LC399" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC400" class="line" lang="haskell"><span class="n" style="color: #333;">tcInferAppHead_maybe</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span></span>
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<pre style="margin: 0;"> <span id="LC401" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HsExprArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpRn</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">@@ -413,7 +414,7 @@ tcInferAppHead_maybe fun args</td>
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<pre style="margin: 0;"> <span id="LC414" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Disgusting special case for ambiguous record selectors</span></span>
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<pre style="margin: 0;"> <span id="LC415" class="line" lang="haskell"> <span class="n" style="color: #333;">go_rec_fld</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Ambiguous</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">lbl</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC416" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">arg1</span> <span class="o" style="font-weight: 600;">:</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">filterOut</span> <span class="n" style="color: #333;">isArgPar</span> <span class="n" style="color: #333;">args</span> <span class="c1" style="color: #998; font-style: italic;">-- A value arg is first</span></span>
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<pre style="margin: 0;">-<span id="LC416" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="kr" style="font-weight: 600;"><span class="idiff left">_</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">ValArg</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">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">arg</span></span><span class="p"><span class="idiff">))</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff right">_</span></span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">arg1</span></span>
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<pre style="margin: 0;">+<span id="LC417" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="p"><span class="idiff left">{</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">eva_arg</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">ValArg</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">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">arg</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">}</span></span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">arg1</span></span>
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<pre style="margin: 0;"> <span id="LC418" 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;">sig_ty</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">obviousSig</span> <span class="n" style="color: #333;">arg</span> <span class="c1" style="color: #998; font-style: italic;">-- A type sig on the arg disambiguates</span></span>
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<pre style="margin: 0;"> <span id="LC419" 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;">sig_tc_ty</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcHsSigWcType</span> <span class="kt" style="color: #458; font-weight: 600;">ExprSigCtxt</span> <span class="n" style="color: #333;">sig_ty</span></span>
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<pre style="margin: 0;"> <span id="LC420" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">sel_name</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">disambiguateSelector</span> <span class="n" style="color: #333;">lbl</span> <span class="n" style="color: #333;">sig_tc_ty</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">@@ -423,11 +424,11 @@ tcInferAppHead_maybe fun args</td>
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<pre style="margin: 0;"> <span id="LC424" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC425" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC426" 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="LC426" class="line" lang="haskell"><span class="n" style="color: #333;">tcArgs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span> <span class="c1" style="color: #998; font-style: italic;">-- Quick-look on?</span></span>
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<pre style="margin: 0;">-<span id="LC427" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">HsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="c1" style="color: #998; font-style: italic;">-- The function (for error messages)</span></span>
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<pre style="margin: 0;">-<span id="LC428" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HsExprArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpInst</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Actual argument</span></span>
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<pre style="margin: 0;">-<span id="LC429" 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;">HsExprArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpTc</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Resulting argument</span></span>
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<pre style="margin: 0;">-<span id="LC430" class="line" lang="haskell"><span class="n" style="color: #333;">tcArgs</span> <span class="n" style="color: #333;">quick_look</span> <span class="n" style="color: #333;">fun</span> <span class="n" style="color: #333;">args</span></span>
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<pre style="margin: 0;">+<span id="LC427" class="line" lang="haskell"><span class="n" style="color: #333;">tc<span class="idiff left right">Val</span>Args</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span> <span class="c1" style="color: #998; font-style: italic;">-- Quick-look on?</span></span>
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<pre style="margin: 0;">+<span id="LC428" class="line" lang="haskell"> <span class="idiff left right"> </span><span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">HsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="c1" style="color: #998; font-style: italic;">-- The function (for error messages)</span></span>
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<pre style="margin: 0;">+<span id="LC429" class="line" lang="haskell"> <span class="idiff left right"> </span><span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HsExprArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpInst</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Actual argument</span></span>
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<pre style="margin: 0;">+<span id="LC430" class="line" lang="haskell"> <span class="idiff left right"> </span><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;">HsExprArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpTc</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Resulting argument</span></span>
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<pre style="margin: 0;">+<span id="LC431" class="line" lang="haskell"><span class="n" style="color: #333;">tc<span class="idiff left right">Val</span>Args</span> <span class="n" style="color: #333;">quick_look</span> <span class="n" style="color: #333;">fun</span> <span class="n" style="color: #333;">args</span></span>
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<pre style="margin: 0;"> <span id="LC432" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="mi" style="color: #099;">1</span> <span class="n" style="color: #333;">args</span></span>
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<pre style="margin: 0;"> <span id="LC433" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC434" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</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">@@ -441,7 +442,7 @@ tcArgs quick_look fun args</td>
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<pre style="margin: 0;"> <span id="LC442" class="line" lang="haskell"> <span class="n" style="color: #333;">tc_arg</span> <span class="n" style="color: #333;">n</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EWrap</span> <span class="n" style="color: #333;">wrap</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">n</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">EWrap</span> <span class="n" style="color: #333;">wrap</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC443" class="line" lang="haskell"> <span class="n" style="color: #333;">tc_arg</span> <span class="n" style="color: #333;">n</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ETypeArg</span> <span class="n" style="color: #333;">l</span> <span class="n" style="color: #333;">hs_ty</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;">return</span> <span class="p">(</span><span class="n" style="color: #333;">n</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;">ETypeArg</span> <span class="n" style="color: #333;">l</span> <span class="n" style="color: #333;">hs_ty</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC444" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC444" class="line" lang="haskell"> <span class="n" style="color: #333;">tc_arg</span> <span class="n" style="color: #333;">n</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">EValArg</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">l</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">arg</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">arg_ty</span></span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC445" class="line" lang="haskell"> <span class="n" style="color: #333;">tc_arg</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;"><span class="idiff left">eva</span></span><span class="o" style="font-weight: 600;"><span class="idiff">@</span></span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">EValArg</span></span><span class="idiff"> </span><span class="p"><span class="idiff">{</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">eva_arg</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">arg</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">eva_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">arg_ty</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">}</span>)</span></span>
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<pre style="margin: 0;"> <span id="LC446" 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="c1" style="color: #998; font-style: italic;">-- Crucial step: expose QL results before checking arg_ty</span></span>
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<pre style="margin: 0;"> <span id="LC447" class="line" lang="haskell"> <span class="n" style="color: #333;">arg_ty</span> <span class="o" style="font-weight: 600;"><-</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">quick_look</span> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">zonkTcType</span> <span class="n" style="color: #333;">arg_ty</span></span>
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<pre style="margin: 0;"> <span id="LC448" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">arg_ty</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">@@ -450,18 +451,20 @@ tcArgs quick_look fun args</td>
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<pre style="margin: 0;"> <span id="LC451" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">arg'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">addErrCtxt</span> <span class="p">(</span><span class="n" style="color: #333;">funAppCtxt</span> <span class="n" style="color: #333;">fun</span> <span class="n" style="color: #333;">arg</span> <span class="n" style="color: #333;">n</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;"> <span id="LC452" class="line" lang="haskell"> <span class="n" style="color: #333;">tcEValArg</span> <span class="n" style="color: #333;">arg</span> <span class="n" style="color: #333;">arg_ty</span></span>
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<pre style="margin: 0;"> <span id="LC453" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC453" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">n</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;"><span class="idiff left">EValArg</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">l</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">ValArg</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">arg'</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">arg_ty</span></span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC454" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">n</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;"><span class="idiff left">eva</span></span><span class="idiff"> </span><span class="p"><span class="idiff">{</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">eva_arg</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">ValArg</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">arg'</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">eva_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">arg_ty</span></span><span class="idiff"> </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="LC455" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC456" class="line" lang="haskell"><span class="n" style="color: #333;">tcEValArg</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpInst</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcSigmaType</span> <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;">LHsExpr</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="LC457" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Typecheck one value argument of a function call</span></span>
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<pre style="margin: 0;"> <span id="LC458" class="line" lang="haskell"><span class="n" style="color: #333;">tcEValArg</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ValArg</span> <span class="n" style="color: #333;">arg</span><span class="p">)</span> <span class="n" style="color: #333;">exp_arg_sigma</span></span>
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<pre style="margin: 0;"> <span id="LC459" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcCheckPolyExprNC</span> <span class="n" style="color: #333;">arg</span> <span class="n" style="color: #333;">exp_arg_sigma</span></span>
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<pre style="margin: 0;"> <span id="LC460" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC460" class="line" lang="haskell"><span class="n" style="color: #333;">tcEValArg</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ValArgQL</span> <span class="n" style="color: #333;">loc</span> <span class="n" style="color: #333;">fun</span> <span class="n" style="color: #333;">args</span> <span class="n" style="color: #333;">app_res_rho</span> <span class="n" style="color: #333;">rebuild</span><span class="p">)</span> <span class="n" style="color: #333;">exp_arg_sigma</span></span>
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<pre style="margin: 0;">-<span id="LC461" 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;">tc_args</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcArgs</span> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="n" style="color: #333;">fun</span> <span class="n" style="color: #333;">args</span></span>
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<pre style="margin: 0;">-<span id="LC462" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">wrap</span><span class="p">,</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcSkolemise</span> <span class="kt" style="color: #458; font-weight: 600;">GenSigCtxt</span> <span class="n" style="color: #333;">exp_arg_sigma</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="n" style="color: #333;">exp_arg_rho</span> <span class="o" style="font-weight: 600;">-></span></span>
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<pre style="margin: 0;">-<span id="LC463" class="line" lang="haskell"> <span class="n" style="color: #333;">unifyType</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="n" style="color: #333;">app_res_rho</span> <span class="n" style="color: #333;">exp_arg_rho</span></span>
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<pre style="margin: 0;">-<span id="LC464" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</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="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkHsWrap</span> <span class="n" style="color: #333;">wrap</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkHsWrapCo</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">rebuild</span> <span class="n" style="color: #333;">fun</span> <span class="n" style="color: #333;">tc_args</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC461" class="line" lang="haskell"><span class="n" style="color: #333;">tcEValArg</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ValArgQL</span> <span class="p">{</span> <span class="n" style="color: #333;">va_loc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">loc</span><span class="p">,</span> <span class="n" style="color: #333;">va_fun</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fun</span><span class="p">,</span> <span class="n" style="color: #333;">va_args</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">args</span></span>
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<pre style="margin: 0;">+<span id="LC462" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">va_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">app_res_rho</span><span class="p">,</span> <span class="n" style="color: #333;">va_rebuild</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rebuild</span> <span class="p">})</span> <span class="n" style="color: #333;">exp_arg_sigma</span></span>
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<pre style="margin: 0;">+<span id="LC463" 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;">traceTc</span> <span class="s" style="color: #d14;">"tcEValArg {"</span> <span class="p">(</span><span class="n" style="color: #333;">vcat</span> <span class="p">[</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">fun</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">args</span> <span class="p">])</span></span>
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<pre style="margin: 0;">+<span id="LC464" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">tc_args</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcValArgs</span> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="n" style="color: #333;">fun</span> <span class="n" style="color: #333;">args</span></span>
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<pre style="margin: 0;">+<span id="LC465" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">unifyType</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="n" style="color: #333;">app_res_rho</span> <span class="n" style="color: #333;">exp_arg_sigma</span></span>
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<pre style="margin: 0;">+<span id="LC466" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"tcEValArg }"</span> <span class="n" style="color: #333;">empty</span></span>
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<pre style="margin: 0;">+<span id="LC467" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</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="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkHsWrapCo</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">rebuild</span> <span class="n" style="color: #333;">fun</span> <span class="n" style="color: #333;">tc_args</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC468" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC469" class="line" lang="haskell"><span class="n" style="color: #333;">tcValArg</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="c1" style="color: #998; font-style: italic;">-- The function (for error messages)</span></span>
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<pre style="margin: 0;"> <span id="LC470" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LHsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="c1" style="color: #998; font-style: italic;">-- Actual argument</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="477" 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">@@ -477,65 +480,6 @@ tcValArg fun arg arg_ty arg_no</td>
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<pre style="margin: 0;"> <span id="LC480" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">tcCheckPolyExprNC</span> <span class="n" style="color: #333;">arg</span> <span class="n" style="color: #333;">arg_ty</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC481" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC482" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC480" 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="LC481" 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="LC482" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Old typechecking for ($)</span></span>
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<pre style="margin: 0;">-<span id="LC483" 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="LC484" 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="LC485" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC486" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This oldTcDollar nonsense is a HORRIBLE HACK to keep</span></span>
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<pre style="margin: 0;">-<span id="LC487" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- us going for now. For some reason, Quick Look doesn't</span></span>
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<pre style="margin: 0;">-<span id="LC488" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- yet give the same answers, sadly</span></span>
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<pre style="margin: 0;">-<span id="LC489" class="line" lang="haskell"><span class="n" style="color: #333;">oldTcDollar</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HsExpr</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;">ExpRhoType</span> <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;">HsExpr</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="LC490" class="line" lang="haskell"><span class="n" style="color: #333;">oldTcDollar</span> <span class="n" style="color: #333;">expr</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">OpApp</span> <span class="n" style="color: #333;">fix</span> <span class="n" style="color: #333;">arg1</span> <span class="n" style="color: #333;">op</span> <span class="n" style="color: #333;">arg2</span><span class="p">)</span> <span class="n" style="color: #333;">res_ty</span></span>
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<pre style="margin: 0;">-<span id="LC491" class="line" lang="haskell"> <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;">loc</span> <span class="n" style="color: #333;">nl_op</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsVar</span> <span class="kr" 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;">lv</span> <span class="n" style="color: #333;">op_name</span><span class="p">)))</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">op</span></span>
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<pre style="margin: 0;">-<span id="LC492" 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>
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<pre style="margin: 0;">-<span id="LC493" class="line" lang="haskell"> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"Application rule"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">op</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC494" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">arg1'</span><span class="p">,</span> <span class="n" style="color: #333;">arg1_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">addErrCtxt</span> <span class="p">(</span><span class="n" style="color: #333;">funAppCtxt</span> <span class="n" style="color: #333;">op</span> <span class="n" style="color: #333;">arg1</span> <span class="mi" style="color: #099;">1</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">-<span id="LC495" class="line" lang="haskell"> <span class="n" style="color: #333;">tcInferRhoNC</span> <span class="n" style="color: #333;">arg1</span></span>
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<pre style="margin: 0;">-<span id="LC496" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC497" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">doc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"The first argument of ($) takes"</span></span>
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<pre style="margin: 0;">-<span id="LC498" class="line" lang="haskell"> <span class="n" style="color: #333;">orig1</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">lexprCtOrigin</span> <span class="n" style="color: #333;">arg1</span></span>
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<pre style="margin: 0;">-<span id="LC499" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">wrap_arg1</span><span class="p">,</span> <span class="p">[</span><span class="n" style="color: #333;">arg2_sigma</span><span class="p">],</span> <span class="n" style="color: #333;">op_res_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="LC500" class="line" lang="haskell"> <span class="n" style="color: #333;">matchActualFunTysRho</span> <span class="n" style="color: #333;">doc</span> <span class="n" style="color: #333;">orig1</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">unLoc</span> <span class="n" style="color: #333;">arg1</span><span class="p">))</span> <span class="mi" style="color: #099;">1</span> <span class="n" style="color: #333;">arg1_ty</span></span>
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<pre style="margin: 0;">-<span id="LC501" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC502" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- We have (arg1 $ arg2)</span></span>
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<pre style="margin: 0;">-<span id="LC503" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- So: arg1_ty = arg2_ty -> op_res_ty</span></span>
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<pre style="margin: 0;">-<span id="LC504" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- where arg2_sigma maybe polymorphic; that's the point</span></span>
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<pre style="margin: 0;">-<span id="LC505" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC506" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">arg2'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcValArg</span> <span class="n" style="color: #333;">nl_op</span> <span class="n" style="color: #333;">arg2</span> <span class="n" style="color: #333;">arg2_sigma</span> <span class="mi" style="color: #099;">2</span></span>
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<pre style="margin: 0;">-<span id="LC507" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC508" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Make sure that the argument type has kind '*'</span></span>
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<pre style="margin: 0;">-<span id="LC509" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ($) :: forall (r:RuntimeRep) (a:*) (b:TYPE r). (a->b) -> a -> b</span></span>
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510
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<pre style="margin: 0;">-<span id="LC510" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Eg we do not want to allow (D# $ 4.0#) #5570</span></span>
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511
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<pre style="margin: 0;">-<span id="LC511" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (which gives a seg fault)</span></span>
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512
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<pre style="margin: 0;">-<span id="LC512" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">unifyKind</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XHsType</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">NHsCoreTy</span> <span class="n" style="color: #333;">arg2_sigma</span><span class="p">))</span></span>
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513
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<pre style="margin: 0;">-<span id="LC513" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">tcTypeKind</span> <span class="n" style="color: #333;">arg2_sigma</span><span class="p">)</span> <span class="n" style="color: #333;">liftedTypeKind</span></span>
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514
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<pre style="margin: 0;">-<span id="LC514" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Ignore the evidence. arg2_sigma must have type * or #,</span></span>
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515
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<pre style="margin: 0;">-<span id="LC515" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- because we know (arg2_sigma -> op_res_ty) is well-kinded</span></span>
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516
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<pre style="margin: 0;">-<span id="LC516" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (because otherwise matchActualFunTysRho would fail)</span></span>
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517
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<pre style="margin: 0;">-<span id="LC517" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- So this 'unifyKind' will either succeed with Refl, or will</span></span>
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518
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<pre style="margin: 0;">-<span id="LC518" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- produce an insoluble constraint * ~ #, which we'll report later.</span></span>
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519
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<pre style="margin: 0;">-<span id="LC519" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC520" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- NB: unlike the argument type, the *result* type, op_res_ty can</span></span>
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521
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<pre style="margin: 0;">-<span id="LC521" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- have any kind (#8739), so we don't need to check anything for that</span></span>
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522
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<pre style="margin: 0;">-<span id="LC522" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC523" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">op_id</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcLookupId</span> <span class="n" style="color: #333;">op_name</span></span>
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524
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<pre style="margin: 0;">-<span id="LC524" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">op'</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;">loc</span> <span class="p">(</span><span class="n" style="color: #333;">mkHsWrap</span> <span class="p">(</span><span class="n" style="color: #333;">mkWpTyApps</span> <span class="p">[</span> <span class="n" style="color: #333;">getRuntimeRep</span> <span class="n" style="color: #333;">op_res_ty</span></span>
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<pre style="margin: 0;">-<span id="LC525" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">arg2_sigma</span></span>
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526
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<pre style="margin: 0;">-<span id="LC526" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">op_res_ty</span><span class="p">])</span></span>
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527
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<pre style="margin: 0;">-<span id="LC527" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsVar</span> <span class="n" style="color: #333;">noExtField</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">lv</span> <span class="n" style="color: #333;">op_id</span><span class="p">)))</span></span>
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528
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<pre style="margin: 0;">-<span id="LC528" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- arg1' :: arg1_ty</span></span>
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529
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<pre style="margin: 0;">-<span id="LC529" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- wrap_arg1 :: arg1_ty "->" (arg2_sigma -> op_res_ty)</span></span>
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530
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<pre style="margin: 0;">-<span id="LC530" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- op' :: (a2_ty -> op_res_ty) -> a2_ty -> op_res_ty</span></span>
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<pre style="margin: 0;">-<span id="LC531" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC532" class="line" lang="haskell"> <span class="n" style="color: #333;">expr'</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">OpApp</span> <span class="n" style="color: #333;">fix</span> <span class="p">(</span><span class="n" style="color: #333;">mkLHsWrap</span> <span class="n" style="color: #333;">wrap_arg1</span> <span class="n" style="color: #333;">arg1'</span><span class="p">)</span> <span class="n" style="color: #333;">op'</span> <span class="n" style="color: #333;">arg2'</span></span>
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<pre style="margin: 0;">-<span id="LC533" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC534" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">tcWrapResult</span> <span class="n" style="color: #333;">expr</span> <span class="n" style="color: #333;">expr'</span> <span class="n" style="color: #333;">op_res_ty</span> <span class="n" style="color: #333;">res_ty</span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC535" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC536" class="line" lang="haskell"><span class="n" style="color: #333;">oldTcDollar</span> <span class="n" style="color: #333;">expr</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"oldTcDollar"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">expr</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC537" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC538" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC483" 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="LC484" 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="LC485" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Instantiating the call</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">@@ -550,8 +494,11 @@ tcInstFun :: Bool -- True <=> ImpredicativeTypes is on; do quick-look</td>
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<pre style="margin: 0;"> <span id="LC494" class="line" lang="haskell"> <span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HsExprArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpInst</span><span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC495" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">TcSigmaType</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC496" class="line" lang="haskell"><span class="n" style="color: #333;">tcInstFun</span> <span class="n" style="color: #333;">impred_on</span> <span class="n" style="color: #333;">inst_final</span> <span class="n" style="color: #333;">rn_fun</span> <span class="n" style="color: #333;">fun_sigma</span> <span class="n" style="color: #333;">rn_args</span></span>
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<pre style="margin: 0;">-<span id="LC553" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"tcInstFun"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rn_fun</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rn_args</span><span class="p">)</span> <span class="o" style="font-weight: 600;">>></span></span>
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<pre style="margin: 0;">-<span id="LC554" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">emptyVarSet</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;">fun_sigma</span> <span class="n" style="color: #333;">rn_args</span></span>
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<pre style="margin: 0;">+<span id="LC497" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">setSrcSpanFromArgs</span> <span class="n" style="color: #333;">rn_args</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">+<span id="LC498" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Setting the location is important for the class constraints</span></span>
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<pre style="margin: 0;">+<span id="LC499" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- that may be emitted from instantiating fun_sigma</span></span>
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<pre style="margin: 0;">+<span id="LC500" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"tcInstFun"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rn_fun</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rn_args</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC501" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">emptyVarSet</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;">fun_sigma</span> <span class="n" style="color: #333;">rn_args</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC502" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC503" class="line" lang="haskell"> <span class="n" style="color: #333;">fun_orig</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">exprCtOrigin</span> <span class="n" style="color: #333;">rn_fun</span></span>
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<pre style="margin: 0;"> <span id="LC504" class="line" lang="haskell"> <span class="n" style="color: #333;">herald</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">sep</span> <span class="p">[</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"The function"</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;">rn_fun</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">@@ -645,136 +592,16 @@ tcInstFun impred_on inst_final rn_fun fun_sigma rn_args</td>
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592
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<pre style="margin: 0;"> <span id="LC592" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">writeMetaTyVar</span> <span class="n" style="color: #333;">kappa</span> <span class="p">(</span><span class="n" style="color: #333;">mkCastTy</span> <span class="n" style="color: #333;">fun_ty'</span> <span class="n" style="color: #333;">kind_co</span><span class="p">)</span></span>
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593
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<pre style="margin: 0;"> <span id="LC593" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">delta'</span> <span class="n" style="color: #333;">acc'</span> <span class="n" style="color: #333;">so_far</span> <span class="n" style="color: #333;">fun_ty'</span> <span class="n" style="color: #333;">args</span> <span class="p">}</span></span>
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594
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<pre style="margin: 0;"> <span id="LC594" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC648" class="line" lang="haskell"> <span class="n" style="color: #333;">go1</span> <span class="n" style="color: #333;">delta</span> <span class="n" style="color: #333;">acc</span> <span class="n" style="color: #333;">so_far</span> <span class="n" style="color: #333;">fun_ty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="n" style="color: #333;">loc</span> <span class="n" style="color: #333;">arg</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">rest_args</span><span class="p">)</span></span>
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595
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<pre style="margin: 0;">+<span id="LC595" class="line" lang="haskell"> <span class="n" style="color: #333;">go1</span> <span class="n" style="color: #333;">delta</span> <span class="n" style="color: #333;">acc</span> <span class="n" style="color: #333;">so_far</span> <span class="n" style="color: #333;">fun_ty</span></span>
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596
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<pre style="margin: 0;">+<span id="LC596" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">eva</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="p">{</span> <span class="n" style="color: #333;">eva_arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">arg</span><span class="p">,</span> <span class="n" style="color: #333;">eva_gd</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">guarded</span> <span class="p">})</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">rest_args</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC597" 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;">wrap</span><span class="p">,</span> <span class="n" style="color: #333;">arg_ty</span><span class="p">,</span> <span class="n" style="color: #333;">res_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">matchActualFunTy</span> <span class="n" style="color: #333;">herald</span></span>
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598
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<pre style="margin: 0;"> <span id="LC598" 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;">rn_fun</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">n_val_args</span><span class="p">,</span> <span class="n" style="color: #333;">so_far</span><span class="p">)</span> <span class="n" style="color: #333;">fun_ty</span></span>
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<pre style="margin: 0;">-<span id="LC651" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">delta'</span><span class="p">,</span> <span class="n" style="color: #333;">val_arg</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">quickLookArg</span> <span class="n" style="color: #333;">impred_on</span> <span class="n" style="color: #333;">delta</span> <span class="n" style="color: #333;">arg</span> <span class="n" style="color: #333;">arg_ty</span></span>
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<pre style="margin: 0;">-<span id="LC652" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">acc'</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="n" style="color: #333;">loc</span> <span class="n" style="color: #333;">val_arg</span> <span class="n" style="color: #333;">arg_ty</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">addArgWrap</span> <span class="n" style="color: #333;">wrap</span> <span class="n" style="color: #333;">acc</span></span>
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599
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<pre style="margin: 0;">+<span id="LC599" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">delta'</span><span class="p">,</span> <span class="n" style="color: #333;">val_arg</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">quickLookArg</span> <span class="n" style="color: #333;">impred_on</span> <span class="n" style="color: #333;">guarded</span> <span class="n" style="color: #333;">delta</span> <span class="n" style="color: #333;">arg</span> <span class="n" style="color: #333;">arg_ty</span></span>
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<pre style="margin: 0;">+<span id="LC600" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">acc'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">eva</span> <span class="p">{</span> <span class="n" style="color: #333;">eva_arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">val_arg</span><span class="p">,</span> <span class="n" style="color: #333;">eva_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">arg_ty</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC601" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">addArgWrap</span> <span class="n" style="color: #333;">wrap</span> <span class="n" style="color: #333;">acc</span></span>
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602
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<pre style="margin: 0;"> <span id="LC602" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">delta'</span> <span class="n" style="color: #333;">acc'</span> <span class="p">(</span><span class="n" style="color: #333;">arg_ty</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">so_far</span><span class="p">)</span> <span class="n" style="color: #333;">res_ty</span> <span class="n" style="color: #333;">rest_args</span> <span class="p">}</span></span>
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603
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<pre style="margin: 0;"> <span id="LC603" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC655" 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="LC656" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">tcInstFunNoEv :: HsExpr GhcRn -> TcSigmaType -> [HsExprArg 'TcpRn]</span></span>
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<pre style="margin: 0;">-<span id="LC657" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -> TcM (Maybe (Delta, TcSigmaType))</span></span>
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<pre style="margin: 0;">-<span id="LC658" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-- This is a version of tcInstFun, but specialised for the call</span></span>
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<pre style="margin: 0;">-<span id="LC659" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-- in quickLookArg. In particular</span></span>
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<pre style="margin: 0;">-<span id="LC660" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-- * No evidence generation; see Note [No evidence in quick look]</span></span>
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<pre style="margin: 0;">-<span id="LC661" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-- * No instantiated arguments returned; all that matters</span></span>
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<pre style="margin: 0;">-<span id="LC662" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-- is the result type (and the Delta set)</span></span>
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<pre style="margin: 0;">-<span id="LC663" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">tcInstFunNoEv rn_fun fun_sigma rn_args</span></span>
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<pre style="margin: 0;">-<span id="LC664" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> = traceTc "tcInstFunNoEv" (ppr rn_fun $$ ppr rn_args) >></span></span>
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<pre style="margin: 0;">-<span id="LC665" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> go emptyVarSet fun_sigma rn_args</span></span>
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<pre style="margin: 0;">-<span id="LC666" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> where</span></span>
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<pre style="margin: 0;">-<span id="LC667" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- go: If fun_ty=kappa, look it up in Theta</span></span>
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<pre style="margin: 0;">-<span id="LC668" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> go delta fun_ty args</span></span>
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<pre style="margin: 0;">-<span id="LC669" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> | Just kappa <- tcGetTyVar_maybe fun_ty</span></span>
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<pre style="margin: 0;">-<span id="LC670" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> , kappa `elemVarSet` delta</span></span>
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<pre style="margin: 0;">-<span id="LC671" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> = do { cts <- readMetaTyVar kappa</span></span>
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<pre style="margin: 0;">-<span id="LC672" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; case cts of</span></span>
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<pre style="margin: 0;">-<span id="LC673" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Indirect fun_ty' -> go delta fun_ty' args</span></span>
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<pre style="margin: 0;">-<span id="LC674" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Flexi -> go1 delta fun_ty args }</span></span>
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<pre style="margin: 0;">-<span id="LC675" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> | otherwise</span></span>
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<pre style="margin: 0;">-<span id="LC676" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> = go1 delta fun_ty args</span></span>
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<pre style="margin: 0;">-<span id="LC677" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC678" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> go1 :: Delta -> TcSigmaType -> [HsExprArg 'TcpRn]</span></span>
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<pre style="margin: 0;">-<span id="LC679" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -> TcM (Maybe (Delta, TcRhoType))</span></span>
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<pre style="margin: 0;">-<span id="LC680" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC681" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> go1 delta fun_ty [] = return (Just (delta, fun_ty))</span></span>
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<pre style="margin: 0;">-<span id="LC682" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> go1 delta fun_ty (EPar {} : args) = go1 delta fun_ty args</span></span>
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<pre style="margin: 0;">-<span id="LC683" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> go1 delta fun_ty (EPrag {} : args) = go1 delta fun_ty args</span></span>
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<pre style="margin: 0;">-<span id="LC684" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC685" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> go1 delta fun_ty args@(ETypeArg {} : _)</span></span>
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<pre style="margin: 0;">-<span id="LC686" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> | (tvbs, body1) <- tcSplitSomeForAllTys (== Inferred) fun_ty</span></span>
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<pre style="margin: 0;">-<span id="LC687" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> , (theta, body2) <- tcSplitPhiTy body1</span></span>
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<pre style="margin: 0;">-<span id="LC688" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> , not (null tvbs && null theta)</span></span>
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<pre style="margin: 0;">-<span id="LC689" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> , let tvs = map binderVar tvbs</span></span>
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<pre style="margin: 0;">-<span id="LC690" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> = do { (delta', fun_rho) <- qlInstTyNoEv delta tvs body2</span></span>
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<pre style="margin: 0;">-<span id="LC691" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; go1 delta' fun_rho args }</span></span>
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<pre style="margin: 0;">-<span id="LC692" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC693" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> go1 delta fun_ty (ETypeArg _ hs_ty_arg _ : args)</span></span>
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694
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<pre style="margin: 0;">-<span id="LC694" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> = do { (_ty_arg, inst_ty) <- tcVTA fun_ty hs_ty_arg</span></span>
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<pre style="margin: 0;">-<span id="LC695" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; go delta inst_ty args }</span></span>
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<pre style="margin: 0;">-<span id="LC696" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC697" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> go1 delta fun_ty args@(EValArg {} : _)</span></span>
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<pre style="margin: 0;">-<span id="LC698" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> | (tvs, theta, body) <- tcSplitSigmaTy fun_ty</span></span>
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<pre style="margin: 0;">-<span id="LC699" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> , not (null tvs && null theta)</span></span>
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<pre style="margin: 0;">-<span id="LC700" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> = do { (delta', fun_rho) <- qlInstTyNoEv delta tvs body</span></span>
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<pre style="margin: 0;">-<span id="LC701" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; go1 delta' fun_rho args }</span></span>
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<pre style="margin: 0;">-<span id="LC702" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC703" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> go1 delta fun_ty (EValArg _ arg _ : args)</span></span>
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<pre style="margin: 0;">-<span id="LC704" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> | Just (arg_ty, res_ty) <- tcSplitFunTy_maybe fun_ty</span></span>
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<pre style="margin: 0;">-<span id="LC705" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> = do { delta' <- quickLookArg True delta arg arg_ty</span></span>
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<pre style="margin: 0;">-<span id="LC706" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; go delta' res_ty args }</span></span>
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<pre style="margin: 0;">-<span id="LC707" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC708" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> | otherwise</span></span>
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709
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<pre style="margin: 0;">-<span id="LC709" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> = return Nothing</span></span>
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<pre style="margin: 0;">-<span id="LC710" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC711" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">qlTopInstantiate :: HsExpr GhcRn -> TcSigmaType</span></span>
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<pre style="margin: 0;">-<span id="LC712" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -> TcM ( Delta -- Instantiation variables</span></span>
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713
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<pre style="margin: 0;">-<span id="LC713" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> , HsWrapper</span></span>
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<pre style="margin: 0;">-<span id="LC714" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> , TcRhoType) -- No top level forall or (=>)</span></span>
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<pre style="margin: 0;">-<span id="LC715" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-- Just like topInstantiate, but also returns the instantiation variables</span></span>
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<pre style="margin: 0;">-<span id="LC716" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">qlTopInstantiate rn_fun ty</span></span>
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<pre style="margin: 0;">-<span id="LC717" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> = go ty</span></span>
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<pre style="margin: 0;">-<span id="LC718" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> where</span></span>
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<pre style="margin: 0;">-<span id="LC719" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> fun_orig = exprCtOrigin rn_fun</span></span>
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<pre style="margin: 0;">-<span id="LC720" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> go ty | (tvs, theta, body) <- tcSplitSigmaTy ty</span></span>
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<pre style="margin: 0;">-<span id="LC721" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> , not (null tvs && null theta)</span></span>
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<pre style="margin: 0;">-<span id="LC722" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> = do { (tvs1, wrap1, body1) <- instantiateSigma fun_orig tvs theta body</span></span>
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<pre style="margin: 0;">-<span id="LC723" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; (tvs2, wrap2, rho) <- go body1</span></span>
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<pre style="margin: 0;">-<span id="LC724" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; return ( mkVarSet tvs1 `unionVarSet` tvs2</span></span>
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<pre style="margin: 0;">-<span id="LC725" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> , wrap2 <.> wrap1, rho) }</span></span>
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<pre style="margin: 0;">-<span id="LC726" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC727" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> | otherwise = return (emptyVarSet, idHsWrapper, ty)</span></span>
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<pre style="margin: 0;">-<span id="LC728" class="line" lang="haskell"></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;">qlTopInstantiateNoEv :: TcSigmaType -> TcM ( Delta, TcRhoType)</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;">-- Just like qlTopInstantiate but without evidence</span></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;">qlTopInstantiateNoEv ty</span></span>
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732
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<pre style="margin: 0;">-<span id="LC732" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> = go emptyVarSet ty</span></span>
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733
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<pre style="margin: 0;">-<span id="LC733" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> where</span></span>
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734
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<pre style="margin: 0;">-<span id="LC734" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> go delta ty | (tvs, theta, body) <- tcSplitSigmaTy ty</span></span>
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735
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<pre style="margin: 0;">-<span id="LC735" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> , not (null tvs && null theta)</span></span>
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736
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<pre style="margin: 0;">-<span id="LC736" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> = do { (delta1, body1) <- qlInstTyNoEv delta tvs body</span></span>
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737
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<pre style="margin: 0;">-<span id="LC737" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; (delta2, rho) <- go delta1 body1</span></span>
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738
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<pre style="margin: 0;">-<span id="LC738" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; return ( delta2, rho) }</span></span>
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739
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<pre style="margin: 0;">-<span id="LC739" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> | otherwise = return (delta, ty)</span></span>
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740
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<pre style="margin: 0;">-<span id="LC740" class="line" lang="haskell"></span>
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741
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<pre style="margin: 0;">-<span id="LC741" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">qlInstTyNoEv :: Delta -> [TyVar] -> TcSigmaType -> TcM (Delta, TcSigmaType)</span></span>
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742
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<pre style="margin: 0;">-<span id="LC742" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-- Instantiates just the type variables of a polymorphic type,</span></span>
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743
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<pre style="margin: 0;">-<span id="LC743" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-- and substitutes in the body</span></span>
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744
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<pre style="margin: 0;">-<span id="LC744" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">qlInstTyNoEv delta tvs body_ty</span></span>
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745
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<pre style="margin: 0;">-<span id="LC745" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> = do { (subst, inst_tvs) <- mapAccumLM newMetaTyVarX empty_subst tvs</span></span>
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746
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<pre style="margin: 0;">-<span id="LC746" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; return (delta `extendVarSetList` inst_tvs, substTy subst body_ty) }</span></span>
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747
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<pre style="margin: 0;">-<span id="LC747" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> where</span></span>
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748
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<pre style="margin: 0;">-<span id="LC748" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> free_tvs = tyCoVarsOfType body_ty</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;"> in_scope = mkInScopeSet (free_tvs `delVarSetList` tvs)</span></span>
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750
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<pre style="margin: 0;">-<span id="LC750" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> empty_subst = mkEmptyTCvSubst in_scope</span></span>
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751
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<pre style="margin: 0;">-<span id="LC751" 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="LC604" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC753" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [No evidence in quick look]</span></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;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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<pre style="margin: 0;">-<span id="LC755" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Supose we are quick-looking a call (f (g x)). Then we will do</span></span>
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<pre style="margin: 0;">-<span id="LC756" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">quickLookArg on the argument (g x). When instantiating</span></span>
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<pre style="margin: 0;">-<span id="LC757" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> g :: Eq a => a -> a</span></span>
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<pre style="margin: 0;">-<span id="LC758" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">in quickLookArg, we don't want to spit out a class constraint for</span></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;">(Eq kappa) into the monad -- it is a total waste, and duplicates what we</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;">will later do during the "real" typechecking of this argument.</span></span>
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761
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<pre style="margin: 0;">-<span id="LC761" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC762" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">You might think that:</span></span>
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763
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<pre style="margin: 0;">-<span id="LC763" class="line" lang="haskell"></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;">* Duplicate constraints do no harm except efficiency. But they do,</span></span>
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<pre style="margin: 0;">-<span id="LC765" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> because they must be solved from Givens, and the type variables</span></span>
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<pre style="margin: 0;">-<span id="LC766" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> in quick look may be different to those in the "rea" typecheck.</span></span>
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<pre style="margin: 0;">-<span id="LC767" class="line" lang="haskell"></span>
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768
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<pre style="margin: 0;">-<span id="LC768" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* we could generate those constraints, but then discard them --</span></span>
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769
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<pre style="margin: 0;">-<span id="LC769" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> inefficient, but correct. But alas we do generate some useful and</span></span>
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770
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<pre style="margin: 0;">-<span id="LC770" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> important kind-equality constraints, and it's not clear how to</span></span>
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771
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<pre style="margin: 0;">-<span id="LC771" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> separate the important from useless ones.</span></span>
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772
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<pre style="margin: 0;">-<span id="LC772" class="line" lang="haskell"></span>
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773
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<pre style="margin: 0;">-<span id="LC773" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">So instead we bite the bullet, and have "NoEv" versions of some</span></span>
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774
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<pre style="margin: 0;">-<span id="LC774" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> * tcInstFunNoEv</span></span>
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775
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<pre style="margin: 0;">-<span id="LC775" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> * qlTopInstantiateNoEv</span></span>
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776
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<pre style="margin: 0;">-<span id="LC776" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> * qlInstTyNoEv</span></span>
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777
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<pre style="margin: 0;">-<span id="LC777" 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="LC605" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC606" 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="LC607" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</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">@@ -854,7 +681,7 @@ The right error is the Hole, which has /already/ been emitted by</td>
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681
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<pre style="margin: 0;"> <span id="LC681" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">tcUnboundId. It later reports 'wurble' as out of scope, and tries to</span></span>
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682
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<pre style="margin: 0;"> <span id="LC682" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">give its type.</span></span>
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683
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<pre style="margin: 0;"> <span id="LC683" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC857" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Fortunately in tcArgs we still have access to the function, so we can</span></span>
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<pre style="margin: 0;">+<span id="LC684" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Fortunately in tc<span class="idiff left right">Val</span>Args we still have access to the function, so we can</span></span>
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<pre style="margin: 0;"> <span id="LC685" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">check if it is a HsUnboundVar. We use this info to simply skip over</span></span>
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<pre style="margin: 0;"> <span id="LC686" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">any visible type arguments. We've already inferred the type of the</span></span>
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<pre style="margin: 0;"> <span id="LC687" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">function, so we'll /already/ have emitted a Hole constraint;</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">@@ -899,6 +726,67 @@ and we had the visible type application</td>
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<pre style="margin: 0;"> <span id="LC726" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC727" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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728
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<pre style="margin: 0;"> <span id="LC728" class="line" lang="haskell"></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;">{- *********************************************************************</span></span>
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730
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<pre style="margin: 0;">+<span id="LC730" 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="LC731" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Guardedness</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;">* *</span></span>
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<pre style="margin: 0;">+<span id="LC733" 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="LC734" class="line" lang="haskell"></span>
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735
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<pre style="margin: 0;">+<span id="LC735" class="line" lang="haskell"><span class="n" style="color: #333;">maybeAddGuardFlags</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;">TcSigmaType</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HsExprArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpRn</span><span class="p">]</span></span>
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736
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<pre style="margin: 0;">+<span id="LC736" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HsExprArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpRn</span><span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC737" class="line" lang="haskell"><span class="n" style="color: #333;">maybeAddGuardFlags</span> <span class="n" style="color: #333;">impred</span> <span class="n" style="color: #333;">fun_ty</span> <span class="n" style="color: #333;">args</span></span>
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<pre style="margin: 0;">+<span id="LC738" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">impred</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;">addGuardFlags</span> <span class="n" style="color: #333;">fun_ty</span> <span class="n" style="color: #333;">args</span><span class="p">)</span></span>
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739
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<pre style="margin: 0;">+<span id="LC739" 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;">args</span> <span class="c1" style="color: #998; font-style: italic;">-- No Quick Look, no need to add guardedness</span></span>
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<pre style="margin: 0;">+<span id="LC740" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC741" class="line" lang="haskell"><span class="n" style="color: #333;">addGuardFlags</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TcSigmaType</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HsExprArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpRn</span><span class="p">]</span></span>
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742
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<pre style="margin: 0;">+<span id="LC742" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Bool</span><span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HsExprArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpRn</span><span class="p">])</span></span>
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743
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<pre style="margin: 0;">+<span id="LC743" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- True <=> there are no free quantified variables</span></span>
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<pre style="margin: 0;">+<span id="LC744" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- in the result of the call</span></span>
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<pre style="margin: 0;">+<span id="LC745" class="line" lang="haskell"><span class="n" style="color: #333;">addGuardFlags</span> <span class="n" style="color: #333;">fun_ty</span> <span class="n" style="color: #333;">args</span></span>
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746
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<pre style="margin: 0;">+<span id="LC746" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">emptyVarSet</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;">fun_ty</span> <span class="n" style="color: #333;">args</span></span>
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<pre style="margin: 0;">+<span id="LC747" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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748
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<pre style="margin: 0;">+<span id="LC748" class="line" lang="haskell"> <span class="n" style="color: #333;">need_instantiation</span> <span class="kt" style="color: #458; font-weight: 600;">[]</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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749
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<pre style="margin: 0;">+<span id="LC749" class="line" lang="haskell"> <span class="n" style="color: #333;">need_instantiation</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="p">{}</span> <span class="o" style="font-weight: 600;">:</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;">True</span></span>
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750
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<pre style="margin: 0;">+<span id="LC750" class="line" lang="haskell"> <span class="n" style="color: #333;">need_instantiation</span> <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="LC751" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC752" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">bvs</span> <span class="n" style="color: #333;">acc</span> <span class="n" style="color: #333;">fun_ty</span> <span class="n" style="color: #333;">args</span></span>
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753
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<pre style="margin: 0;">+<span id="LC753" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">need_instantiation</span> <span class="n" style="color: #333;">args</span></span>
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754
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<pre style="margin: 0;">+<span id="LC754" class="line" lang="haskell"> <span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">tvs</span><span class="p">,</span> <span class="n" style="color: #333;">theta</span><span class="p">,</span> <span class="n" style="color: #333;">rho</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcSplitSigmaTy</span> <span class="n" style="color: #333;">fun_ty</span></span>
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755
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<pre style="margin: 0;">+<span id="LC755" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">null</span> <span class="n" style="color: #333;">tvs</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">null</span> <span class="n" style="color: #333;">theta</span><span class="p">)</span></span>
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756
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<pre style="margin: 0;">+<span id="LC756" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">bvs</span> <span class="p">`</span><span class="n" style="color: #333;">extendVarSetList</span><span class="p">`</span> <span class="n" style="color: #333;">tvs</span><span class="p">)</span> <span class="n" style="color: #333;">acc</span> <span class="n" style="color: #333;">rho</span> <span class="n" style="color: #333;">args</span></span>
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757
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<pre style="margin: 0;">+<span id="LC757" class="line" lang="haskell"></span>
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758
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<pre style="margin: 0;">+<span id="LC758" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">bvs</span> <span class="n" style="color: #333;">acc</span> <span class="n" style="color: #333;">fun_ty</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>
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759
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<pre style="margin: 0;">+<span id="LC759" class="line" lang="haskell"> <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;">fun_ty</span> <span class="p">`</span><span class="n" style="color: #333;">disjointVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">bvs</span></span>
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760
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<pre style="margin: 0;">+<span id="LC760" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">reverse</span> <span class="n" style="color: #333;">acc</span><span class="p">)</span></span>
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761
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<pre style="margin: 0;">+<span id="LC761" class="line" lang="haskell"></span>
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762
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<pre style="margin: 0;">+<span id="LC762" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">bvs</span> <span class="n" style="color: #333;">acc</span> <span class="n" style="color: #333;">fun_ty</span> <span class="p">(</span><span class="n" style="color: #333;">arg</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EPar</span> <span class="p">{})</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">bvs</span> <span class="p">(</span><span class="n" style="color: #333;">arg</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">acc</span><span class="p">)</span> <span class="n" style="color: #333;">fun_ty</span> <span class="n" style="color: #333;">args</span></span>
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<td class="diff-line-num new new_line" data-linenumber="763" 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">
763
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<pre style="margin: 0;">+<span id="LC763" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">bvs</span> <span class="n" style="color: #333;">acc</span> <span class="n" style="color: #333;">fun_ty</span> <span class="p">(</span><span class="n" style="color: #333;">arg</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EPrag</span> <span class="p">{})</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">bvs</span> <span class="p">(</span><span class="n" style="color: #333;">arg</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">acc</span><span class="p">)</span> <span class="n" style="color: #333;">fun_ty</span> <span class="n" style="color: #333;">args</span></span>
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764
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<pre style="margin: 0;">+<span id="LC764" class="line" lang="haskell"></span>
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765
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<pre style="margin: 0;">+<span id="LC765" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">bvs</span> <span class="n" style="color: #333;">acc</span> <span class="n" style="color: #333;">fun_ty</span> <span class="n" style="color: #333;">args</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="n" style="color: #333;">arg</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ETypeArg</span> <span class="p">{})</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">rest_args</span><span class="p">)</span></span>
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<td class="diff-line-num new new_line" data-linenumber="766" 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">
766
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<pre style="margin: 0;">+<span id="LC766" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="n" style="color: #333;">tvbs</span><span class="p">,</span> <span class="n" style="color: #333;">body1</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcSplitSomeForAllTys</span> <span class="p">(</span><span class="o" style="font-weight: 600;">==</span> <span class="kt" style="color: #458; font-weight: 600;">Inferred</span><span class="p">)</span> <span class="n" style="color: #333;">fun_ty</span></span>
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767
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<pre style="margin: 0;">+<span id="LC767" class="line" lang="haskell"> <span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">theta</span><span class="p">,</span> <span class="n" style="color: #333;">body2</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcSplitPhiTy</span> <span class="n" style="color: #333;">body1</span></span>
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<td class="diff-line-num new new_line" data-linenumber="768" 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">
768
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<pre style="margin: 0;">+<span id="LC768" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">null</span> <span class="n" style="color: #333;">tvbs</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">null</span> <span class="n" style="color: #333;">theta</span><span class="p">)</span></span>
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<td class="diff-line-num new new_line" data-linenumber="769" 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">
769
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<pre style="margin: 0;">+<span id="LC769" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">bvs</span> <span class="p">`</span><span class="n" style="color: #333;">extendVarSetList</span><span class="p">`</span> <span class="n" style="color: #333;">binderVars</span> <span class="n" style="color: #333;">tvbs</span><span class="p">)</span> <span class="n" style="color: #333;">acc</span> <span class="n" style="color: #333;">body2</span> <span class="n" style="color: #333;">args</span></span>
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<td class="diff-line-num new new_line" data-linenumber="770" 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">
770
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<pre style="margin: 0;">+<span id="LC770" 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;">_tv</span><span class="p">,</span> <span class="n" style="color: #333;">res_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcSplitForAllTy_maybe</span> <span class="n" style="color: #333;">fun_ty</span></span>
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<td class="diff-line-num new new_line" data-linenumber="771" 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">
771
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<pre style="margin: 0;">+<span id="LC771" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">bvs</span> <span class="p">(</span><span class="n" style="color: #333;">arg</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">acc</span><span class="p">)</span> <span class="n" style="color: #333;">res_ty</span> <span class="n" style="color: #333;">rest_args</span></span>
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772
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<pre style="margin: 0;">+<span id="LC772" class="line" lang="haskell"></span>
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773
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<pre style="margin: 0;">+<span id="LC773" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">bvs</span> <span class="n" style="color: #333;">acc</span> <span class="n" style="color: #333;">fun_ty</span> <span class="p">(</span><span class="n" style="color: #333;">arg</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="p">{})</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">rest_args</span><span class="p">)</span></span>
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<td class="diff-line-num new new_line" data-linenumber="774" 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">
774
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<pre style="margin: 0;">+<span id="LC774" 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;">arg_ty</span><span class="p">,</span> <span class="n" style="color: #333;">res_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcSplitFunTy_maybe</span> <span class="n" style="color: #333;">fun_ty</span></span>
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775
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<pre style="margin: 0;">+<span id="LC775" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">bvs</span> <span class="p">(</span><span class="n" style="color: #333;">arg</span> <span class="p">{</span> <span class="n" style="color: #333;">eva_gd</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isGuardedTy</span> <span class="n" style="color: #333;">arg_ty</span> <span class="p">}</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">acc</span><span class="p">)</span></span>
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776
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<pre style="margin: 0;">+<span id="LC776" class="line" lang="haskell"> <span class="n" style="color: #333;">res_ty</span> <span class="n" style="color: #333;">rest_args</span></span>
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777
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<pre style="margin: 0;">+<span id="LC777" class="line" lang="haskell"></span>
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778
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<pre style="margin: 0;">+<span id="LC778" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">acc</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">args</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">bale_out</span> <span class="n" style="color: #333;">acc</span> <span class="n" style="color: #333;">args</span></span>
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779
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<pre style="margin: 0;">+<span id="LC779" class="line" lang="haskell"></span>
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780
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<pre style="margin: 0;">+<span id="LC780" class="line" lang="haskell"> <span class="n" style="color: #333;">bale_out</span> <span class="n" style="color: #333;">acc</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">,</span> <span class="n" style="color: #333;">reverse</span> <span class="n" style="color: #333;">acc</span><span class="p">)</span></span>
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781
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<pre style="margin: 0;">+<span id="LC781" class="line" lang="haskell"> <span class="n" style="color: #333;">bale_out</span> <span class="n" style="color: #333;">acc</span> <span class="p">(</span><span class="n" style="color: #333;">arg</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="p">{})</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span></span>
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782
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<pre style="margin: 0;">+<span id="LC782" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">bale_out</span> <span class="p">(</span><span class="n" style="color: #333;">arg</span> <span class="p">{</span> <span class="n" style="color: #333;">eva_gd</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="p">}</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">acc</span><span class="p">)</span> <span class="n" style="color: #333;">args</span></span>
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783
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<pre style="margin: 0;">+<span id="LC783" class="line" lang="haskell"> <span class="n" style="color: #333;">bale_out</span> <span class="n" style="color: #333;">acc</span> <span class="p">(</span><span class="n" style="color: #333;">arg</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">bale_out</span> <span class="p">(</span><span class="n" style="color: #333;">arg</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">acc</span><span class="p">)</span> <span class="n" style="color: #333;">args</span></span>
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784
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<pre style="margin: 0;">+<span id="LC784" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC785" class="line" lang="haskell"><span class="n" style="color: #333;">isGuardedTy</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TcType</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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786
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<pre style="margin: 0;">+<span id="LC786" class="line" lang="haskell"><span class="n" style="color: #333;">isGuardedTy</span> <span class="n" style="color: #333;">ty</span></span>
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787
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<pre style="margin: 0;">+<span id="LC787" 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="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcSplitTyConApp_maybe</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isGenerativeTyCon</span> <span class="n" style="color: #333;">tc</span> <span class="kt" style="color: #458; font-weight: 600;">Nominal</span></span>
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788
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<pre style="margin: 0;">+<span id="LC788" 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;">tcSplitAppTy_maybe</span> <span class="n" style="color: #333;">ty</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="LC789" 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;">False</span></span>
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790
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<pre style="margin: 0;"> <span id="LC790" class="line" lang="haskell"></span>
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791
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<pre style="margin: 0;"> <span id="LC791" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC792" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- *********************************************************************</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">@@ -910,7 +798,7 @@ and we had the visible type application</td>
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798
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<pre style="margin: 0;"> <span id="LC798" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">Delta</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TcTyVarSet</span> <span class="c1" style="color: #998; font-style: italic;">-- Set of instantiation variables</span></span>
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799
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<pre style="margin: 0;"> <span id="LC799" class="line" lang="haskell"></span>
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800
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<pre style="margin: 0;"> <span id="LC800" 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="LC913" class="line" lang="haskell"><span class="n" style="color: #333;">quickLookArg</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;">Delta</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcSigmaType</span></span>
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<pre style="margin: 0;">+<span id="LC801" class="line" lang="haskell"><span class="n" style="color: #333;">quickLookArg</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;"><span class="idiff left">Bool</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff right"> </span><span class="kt" style="color: #458; font-weight: 600;">Delta</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcSigmaType</span></span>
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802
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<pre style="margin: 0;"> <span id="LC802" 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;">Delta</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">EValArg</span> <span class="kt" style="color: #458; font-weight: 600;">'TcpInst</span><span class="p">)</span></span>
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915
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803
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<pre style="margin: 0;"> <span id="LC803" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Special behaviour only for (f e1 .. en)</span></span>
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916
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804
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<pre style="margin: 0;"> <span id="LC804" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Even narrower than tcInferAppHead! But plenty for now.</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">@@ -919,72 +807,54 @@ quickLookArg :: Bool -> Delta -> EValArg 'TcpRn -> TcSigmaType</td>
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<pre style="margin: 0;"> <span id="LC807" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- with added instantiation variables from</span></span>
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808
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<pre style="margin: 0;"> <span id="LC808" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (a) the call itself</span></span>
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<pre style="margin: 0;"> <span id="LC809" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (b) the arguments of the call</span></span>
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<pre style="margin: 0;">-<span id="LC922" class="line" lang="haskell"><span class="n" style="color: #333;">quickLookArg</span> <span class="n" style="color: #333;">impred_on</span> <span class="n" style="color: #333;">delta</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ValArg</span> <span class="n" style="color: #333;">larg</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;">loc</span> <span class="n" style="color: #333;">arg</span><span class="p">))</span> <span class="n" style="color: #333;">arg_ty</span></span>
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<pre style="margin: 0;">-<span id="LC923" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">not</span> <span class="n" style="color: #333;">impred_on</span></span>
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<pre style="margin: 0;">-<span id="LC924" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">no_ql_result</span></span>
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<pre style="margin: 0;">-<span id="LC925" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isEmptyVarSet</span> <span class="n" style="color: #333;">delta</span></span>
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<pre style="margin: 0;">-<span id="LC926" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">no_ql_result</span></span>
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810
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<pre style="margin: 0;">+<span id="LC810" class="line" lang="haskell"><span class="n" style="color: #333;">quickLookArg</span> <span class="n" style="color: #333;">impred_on</span> <span class="n" style="color: #333;">guarded</span> <span class="n" style="color: #333;">delta</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ValArg</span> <span class="n" style="color: #333;">larg</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;">loc</span> <span class="n" style="color: #333;">arg</span><span class="p">))</span> <span class="n" style="color: #333;">arg_ty</span></span>
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811
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<pre style="margin: 0;">+<span id="LC811" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">not</span> <span class="n" style="color: #333;">impred_on</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">no_ql_result</span></span>
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812
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<pre style="margin: 0;">+<span id="LC812" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isEmptyVarSet</span> <span class="n" style="color: #333;">delta</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">no_ql_result</span></span>
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813
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<pre style="margin: 0;">+<span id="LC813" 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;">isRhoTy</span> <span class="n" style="color: #333;">arg_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">no_ql_result</span></span>
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814
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<pre style="margin: 0;"> <span id="LC814" 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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<pre style="margin: 0;">-<span id="LC928" 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="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">rn_fun</span><span class="p">,</span><span class="n" style="color: #333;">rn_args</span><span class="p">,</span><span class="n" style="color: #333;">rebuild</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">splitHsApps</span> <span class="n" style="color: #333;">arg</span></span>
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<td class="diff-line-num new new_line" data-linenumber="815" 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">
815
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<pre style="margin: 0;">+<span id="LC815" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">setSrcSpan</span> <span class="n" style="color: #333;">loc</span> <span class="o" style="font-weight: 600;">$</span></span>
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<td class="diff-line-num new new_line" data-linenumber="816" 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">
816
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<pre style="margin: 0;">+<span id="LC816" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">rn_fun</span><span class="p">,</span><span class="n" style="color: #333;">rn_args</span><span class="p">,</span><span class="n" style="color: #333;">rebuild</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">splitHsApps</span> <span class="n" style="color: #333;">arg</span></span>
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929
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<td class="diff-line-num new_line" data-linenumber="817" 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">
817
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<pre style="margin: 0;"> <span id="LC817" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">mb_fun_ty</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInferAppHead_maybe</span> <span class="n" style="color: #333;">rn_fun</span> <span class="n" style="color: #333;">rn_args</span></span>
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930
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<td class="diff-line-num new_line old" data-linenumber="818" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC930" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"quickLookArg 1"</span> <span class="o" style="font-weight: 600;">$</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rn_fun</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rn_args</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">mb_fun_ty</span><span class="p">)</span></span>
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<td class="diff-line-num new new_line" data-linenumber="818" 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">
818
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<pre style="margin: 0;">+<span id="LC818" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"quickLookArg 1"</span> <span class="o" style="font-weight: 600;">$</span></span>
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<td class="diff-line-num new new_line" data-linenumber="819" 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">
819
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<pre style="margin: 0;">+<span id="LC819" class="line" lang="haskell"> <span class="n" style="color: #333;">vcat</span> <span class="p">[</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"arg:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">arg</span></span>
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<td class="diff-line-num new old_line" data-linenumber="931" 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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<td class="diff-line-num new new_line" data-linenumber="820" 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">
820
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<pre style="margin: 0;">+<span id="LC820" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"head:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rn_fun</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">dcolon</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">mb_fun_ty</span></span>
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<td class="diff-line-num new new_line" data-linenumber="821" 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">
821
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<pre style="margin: 0;">+<span id="LC821" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"args:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rn_args</span> <span class="p">]</span></span>
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822
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<pre style="margin: 0;">+<span id="LC822" class="line" lang="haskell"></span>
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931
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823
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<pre style="margin: 0;"> <span id="LC823" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">mb_fun_ty</span> <span class="kr" style="font-weight: 600;">of</span> <span class="p">{</span></span>
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<td class="diff-line-num old_line" data-linenumber="932" 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">
932
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<td class="diff-line-num new_line" data-linenumber="824" 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">
824
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<pre style="margin: 0;"> <span id="LC824" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;">-></span> <span class="c1" style="color: #998; font-style: italic;">-- fun is too complicated</span></span>
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<td class="diff-line-num old_line" data-linenumber="933" 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">
933
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<td class="diff-line-num new_line" data-linenumber="825" 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">
825
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<pre style="margin: 0;"> <span id="LC825" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">no_ql_result</span> <span class="p">;</span></span>
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<td class="diff-line-num old_line" data-linenumber="934" 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">
934
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<td class="diff-line-num new_line" data-linenumber="826" 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">
826
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<pre style="margin: 0;"> <span id="LC826" 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;">fun'</span><span class="p">,</span> <span class="n" style="color: #333;">fun_sigma</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span></span>
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935
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<td class="diff-line-num new_line" data-linenumber="827" 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">
827
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<pre style="margin: 0;"> <span id="LC827" class="line" lang="haskell"></span>
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<td class="diff-line-num old old_line" data-linenumber="936" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
936
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<td class="diff-line-num new_line old" data-linenumber="828" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC936" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">delta1</span><span class="p">,</span> <span class="n" style="color: #333;">inst_args</span><span class="p">,</span> <span class="n" style="color: #333;">app_res_rho</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInstFun</span> <span class="n" style="color: #333;">impred_on</span> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="n" style="color: #333;">rn_fun</span> <span class="n" style="color: #333;">fun_sigma</span> <span class="n" style="color: #333;">rn_args</span></span>
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828
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<pre style="margin: 0;">+<span id="LC828" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">no_free_kappas</span><span class="p">,</span> <span class="n" style="color: #333;">rn_args'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">addGuardFlags</span> <span class="n" style="color: #333;">fun_sigma</span> <span class="n" style="color: #333;">rn_args</span></span>
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<td class="diff-line-num new new_line" data-linenumber="829" 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">
829
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<pre style="margin: 0;">+<span id="LC829" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"quickLookArg 2"</span> <span class="o" style="font-weight: 600;">$</span></span>
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<td class="diff-line-num new new_line" data-linenumber="830" 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">
830
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<pre style="margin: 0;">+<span id="LC830" class="line" lang="haskell"> <span class="n" style="color: #333;">vcat</span> <span class="p">[</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"no_free_kappas:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">no_free_kappas</span></span>
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<td class="diff-line-num new new_line" data-linenumber="831" 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">
831
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<pre style="margin: 0;">+<span id="LC831" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"guarded:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">guarded</span> <span class="p">]</span></span>
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<td class="diff-line-num new new_line" data-linenumber="832" 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">
832
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<pre style="margin: 0;">+<span id="LC832" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">guarded</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">no_free_kappas</span><span class="p">)</span></span>
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<td class="diff-line-num new new_line" data-linenumber="833" 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">
833
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<pre style="margin: 0;">+<span id="LC833" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">no_ql_result</span></span>
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<td class="diff-line-num new new_line" data-linenumber="834" 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">
834
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<pre style="margin: 0;">+<span id="LC834" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span></span>
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<td class="diff-line-num new new_line" data-linenumber="835" 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">
835
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<pre style="margin: 0;">+<span id="LC835" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">delta_app</span><span class="p">,</span> <span class="n" style="color: #333;">inst_args</span><span class="p">,</span> <span class="n" style="color: #333;">app_res_rho</span><span class="p">)</span></span>
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<td class="diff-line-num new new_line" data-linenumber="836" 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">
836
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<pre style="margin: 0;">+<span id="LC836" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInstFun</span> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="n" style="color: #333;">rn_fun</span> <span class="n" style="color: #333;">fun_sigma</span> <span class="n" style="color: #333;">rn_args'</span></span>
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937
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<td class="diff-line-num new_line" data-linenumber="837" 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">
837
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<pre style="margin: 0;"> <span id="LC837" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"quickLookArg"</span> <span class="o" style="font-weight: 600;">$</span></span>
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938
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<td class="diff-line-num new_line old" data-linenumber="838" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC938" class="line" lang="haskell"> <span class="n" style="color: #333;">vcat</span> <span class="p">[</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"<span class="idiff left">delta:"</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">ppr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">delta</span></span></span>
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<td class="diff-line-num old old_line" data-linenumber="939" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
939
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<td class="diff-line-num new_line old" data-linenumber="838" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC939" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"delta<span class="idiff left">1:"</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">ppr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">delta1</span></span></span>
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<td class="diff-line-num old old_line" data-linenumber="940" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
940
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<td class="diff-line-num new_line old" data-linenumber="838" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC940" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"<span class="idiff left">arg:"</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">ppr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">arg</span></span></span>
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<td class="diff-line-num new new_line" data-linenumber="838" 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">
838
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<pre style="margin: 0;">+<span id="LC838" class="line" lang="haskell"> <span class="n" style="color: #333;">vcat</span> <span class="p">[</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"<span class="idiff left">arg:"</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">ppr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">arg</span></span></span>
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<td class="diff-line-num new new_line" data-linenumber="839" 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">
839
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<pre style="margin: 0;">+<span id="LC839" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"delta<span class="idiff left">:"</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">ppr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">delta</span></span></span>
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<td class="diff-line-num new new_line" data-linenumber="840" 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">
840
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<pre style="margin: 0;">+<span id="LC840" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"<span class="idiff left">delta_app:"</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">ppr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">delta_app</span></span></span>
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941
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<td class="diff-line-num new_line" data-linenumber="841" 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">
841
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<pre style="margin: 0;"> <span id="LC841" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"arg_ty:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">arg_ty</span></span>
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<td class="diff-line-num old old_line" data-linenumber="942" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
942
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<td class="diff-line-num new_line old" data-linenumber="842" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC942" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"app_res_rho:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">app_res_rho</span></span>
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<td class="diff-line-num old old_line" data-linenumber="943" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
943
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<td class="diff-line-num new_line old" data-linenumber="842" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC943" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"guarded"</span> <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;">isRigidTy</span> <span class="n" style="color: #333;">arg_ty</span><span class="p">)</span> <span class="p">]</span></span>
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944
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<td class="diff-line-num new_line old" data-linenumber="842" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC944" class="line" lang="haskell"></span>
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945
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<td class="diff-line-num new_line old" data-linenumber="842" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC945" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">delta'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">delta</span> <span class="p">`</span><span class="n" style="color: #333;">unionVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">delta1</span></span>
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<td class="diff-line-num new new_line" data-linenumber="842" 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">
842
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<pre style="margin: 0;">+<span id="LC842" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"app_res_rho:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">app_res_rho</span> <span class="p">]</span></span>
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946
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843
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<pre style="margin: 0;"> <span id="LC843" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC947" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">Test for guardedness, and if so, unify</span></span></span>
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<pre style="margin: 0;">+<span id="LC844" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">Do quick-look unification</span></span></span>
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<pre style="margin: 0;"> <span id="LC845" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- NB: arg_ty may not be zonked, but that's ok</span></span>
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<pre style="margin: 0;">-<span id="LC949" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">when</span> <span class="p">(</span><span class="n" style="color: #333;">isEmptyVarSet</span> <span class="n" style="color: #333;">delta1</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">isRigidTy</span> <span class="n" style="color: #333;">arg_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="LC950" class="line" lang="haskell"> <span class="n" style="color: #333;">qlUnify</span> <span class="n" style="color: #333;">delta'</span> <span class="n" style="color: #333;">arg_ty</span> <span class="n" style="color: #333;">app_res_rho</span></span>
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<pre style="margin: 0;">-<span id="LC951" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC952" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">ql_arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ValArgQL</span> <span class="n" style="color: #333;">loc</span> <span class="n" style="color: #333;">fun'</span> <span class="n" style="color: #333;">inst_args</span> <span class="n" style="color: #333;">app_res_rho</span> <span class="n" style="color: #333;">rebuild</span></span>
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<pre style="margin: 0;">-<span id="LC953" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">delta'</span><span class="p">,</span> <span class="n" style="color: #333;">ql_arg</span><span class="p">)</span> <span class="p">}</span> <span class="p">}</span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC954" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC846" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">delta'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">delta</span> <span class="p">`</span><span class="n" style="color: #333;">unionVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">delta_app</span></span>
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<pre style="margin: 0;">+<span id="LC847" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">qlUnify</span> <span class="n" style="color: #333;">delta'</span> <span class="n" style="color: #333;">arg_ty</span> <span class="n" style="color: #333;">app_res_rho</span></span>
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<pre style="margin: 0;">+<span id="LC848" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC849" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">ql_arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ValArgQL</span> <span class="p">{</span> <span class="n" style="color: #333;">va_loc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">loc</span><span class="p">,</span> <span class="n" style="color: #333;">va_fun</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fun'</span></span>
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<pre style="margin: 0;">+<span id="LC850" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">va_args</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">inst_args</span></span>
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<pre style="margin: 0;">+<span id="LC851" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">va_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">app_res_rho</span></span>
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<pre style="margin: 0;">+<span id="LC852" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">va_rebuild</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rebuild</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC853" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">delta'</span><span class="p">,</span> <span class="n" style="color: #333;">ql_arg</span><span class="p">)</span> <span class="p">}</span> <span class="p">}</span> <span class="p">}</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC854" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC855" class="line" lang="haskell"> <span class="n" style="color: #333;">no_ql_result</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">delta</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">ValArg</span> <span class="n" style="color: #333;">larg</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC856" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC857" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC959" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">----------------</span></span>
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960
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<pre style="margin: 0;">-<span id="LC960" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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961
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<pre style="margin: 0;">-<span id="LC961" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">quickLookFun :: HsExpr GhcRn -> TcM (Maybe TcSigmaType)</span></span>
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<td class="diff-line-num old old_line" data-linenumber="962" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
962
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<td class="diff-line-num new_line old" data-linenumber="858" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC962" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-- An extremely cut-down form of tcInferId</span></span>
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<td class="diff-line-num old old_line" data-linenumber="963" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
963
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<pre style="margin: 0;">-<span id="LC963" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-- Returns only the type; and does none of the extra checks</span></span>
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<td class="diff-line-num old old_line" data-linenumber="964" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
964
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<td class="diff-line-num new_line old" data-linenumber="858" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC964" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-- We could use tcInferId, except for performance;</span></span>
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<td class="diff-line-num old old_line" data-linenumber="965" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
965
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<pre style="margin: 0;">-<span id="LC965" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-- indeed tcLookupFunTy always return the second component</span></span>
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966
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<pre style="margin: 0;">-<span id="LC966" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-- of what tcInferId would return</span></span>
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967
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<pre style="margin: 0;">-<span id="LC967" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">quickLookFun (HsVar _ (L _ name))</span></span>
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968
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<pre style="margin: 0;">-<span id="LC968" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> = do { thing <- tcLookup name</span></span>
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969
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<pre style="margin: 0;">-<span id="LC969" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; case thing of</span></span>
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<td class="diff-line-num old old_line" data-linenumber="970" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
970
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<pre style="margin: 0;">-<span id="LC970" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ATcId { tct_id = id } -> return (Just (idType id))</span></span>
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971
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<pre style="margin: 0;">-<span id="LC971" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> AGlobal (AnId id) -> return (Just (idType id))</span></span>
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<td class="diff-line-num old old_line" data-linenumber="972" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
972
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<pre style="margin: 0;">-<span id="LC972" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> AGlobal (AConLike cl) -> case cl of</span></span>
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973
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<pre style="margin: 0;">-<span id="LC973" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> RealDataCon dc -> return (Just (dataConUserType dc))</span></span>
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<td class="diff-line-num old old_line" data-linenumber="974" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
974
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<pre style="margin: 0;">-<span id="LC974" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> PatSynCon ps -> case patSynBuilderOcc ps of</span></span>
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<td class="diff-line-num old old_line" data-linenumber="975" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
975
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<pre style="margin: 0;">-<span id="LC975" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Just (_, ty) -> return (Just ty)</span></span>
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<td class="diff-line-num old old_line" data-linenumber="976" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
976
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<pre style="margin: 0;">-<span id="LC976" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Nothing -> return Nothing</span></span>
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977
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<pre style="margin: 0;">-<span id="LC977" class="line" lang="haskell"></span>
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978
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<pre style="margin: 0;">-<span id="LC978" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> _ -> return Nothing }</span></span>
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979
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<pre style="margin: 0;">-<span id="LC979" class="line" lang="haskell"></span>
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980
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<pre style="margin: 0;">-<span id="LC980" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">quickLookFun (ExprWithTySig _ _ hs_ty)</span></span>
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<td class="diff-line-num old old_line" data-linenumber="981" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
981
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<pre style="margin: 0;">-<span id="LC981" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> | isCompleteHsSig hs_ty</span></span>
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982
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<pre style="margin: 0;">-<span id="LC982" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> = do { sig_ty <- tcHsSigWcType ExprSigCtxt hs_ty</span></span>
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983
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<pre style="margin: 0;">-<span id="LC983" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; return (Just sig_ty) }</span></span>
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<pre style="margin: 0;">-<span id="LC984" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC985" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">quickLookFun _ = return Nothing</span></span>
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<pre style="margin: 0;">-<span id="LC986" 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="LC987" class="line" lang="haskell"></span>
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988
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858
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<pre style="margin: 0;"> <span id="LC858" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">---------------------</span></span>
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989
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859
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<pre style="margin: 0;"> <span id="LC859" class="line" lang="haskell"><span class="n" style="color: #333;">qlUnify</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Delta</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcType</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcType</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="nb" style="color: #0086b3;">()</span></span>
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860
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<pre style="margin: 0;"> <span id="LC860" class="line" lang="haskell"><span class="n" style="color: #333;">qlUnify</span> <span class="n" style="color: #333;">delta</span> <span class="n" style="color: #333;">ty1</span> <span class="n" style="color: #333;">ty2</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">@@ -1068,8 +938,8 @@ qlUnify delta ty1 ty2</td>
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1068
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<pre style="margin: 0;"> <span id="LC938" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">kappa</span> <span class="p">`</span><span class="n" style="color: #333;">elemVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">ty2_tvs</span></span>
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1069
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939
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<pre style="margin: 0;"> <span id="LC939" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="nb" style="color: #0086b3;">()</span> <span class="c1" style="color: #998; font-style: italic;">-- Occurs-check</span></span>
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1070
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940
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<pre style="margin: 0;"> <span id="LC940" class="line" lang="haskell"></span>
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1071
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<pre style="margin: 0;">-<span id="LC1071" 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;">isAlmostFunctionFree</span> <span class="n" style="color: #333;">ty2</span><span class="p">)</span></span>
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1072
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<pre style="margin: 0;">-<span id="LC1072" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="nb" style="color: #0086b3;">()</span> <span class="c1" style="color: #998; font-style: italic;">-- Sigh. See Note [Quick Look at type families]</span></span>
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<pre style="margin: 0;">+<span id="LC941" class="line" lang="haskell"><span class="cd"><span class="idiff left right">--</span> | not (isAlmostFunctionFree ty2)</span></span>
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<pre style="margin: 0;">+<span id="LC942" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;"><span class="idiff left right">--</span> = return () -- Sigh. See Note [Quick Look at type families]</span></span>
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1073
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943
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<pre style="margin: 0;"> <span id="LC943" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC944" 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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1075
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945
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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="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="c1" style="color: #998; font-style: italic;">-- Unify the kinds; see Note [Kinds in QL unify]</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eae80258c718ee303910818acf715e78a98a7f59#902811828741e6bcd64702935bbb54edbbd070ef"><strong>compiler/GHC/Tc/Gen/Expr.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">@@ -333,100 +333,10 @@ With PostfixOperators we don't actually require the function to take</td>
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333
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333
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<pre style="margin: 0;"> <span id="LC333" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">two arguments at all. For example, (x `not`) means (not x); you get</span></span>
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334
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334
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<pre style="margin: 0;"> <span id="LC334" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">postfix operators! Not Haskell 98, but it's less work and kind of</span></span>
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335
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335
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<pre style="margin: 0;"> <span id="LC335" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">useful.</span></span>
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336
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<pre style="margin: 0;">-<span id="LC336" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC337" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Typing rule for ($)]</span></span>
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<pre style="margin: 0;">-<span id="LC338" 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="LC339" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">People write</span></span>
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<pre style="margin: 0;">-<span id="LC340" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> runST $ blah</span></span>
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<pre style="margin: 0;">-<span id="LC341" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">so much, where</span></span>
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<pre style="margin: 0;">-<span id="LC342" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> runST :: (forall s. ST s a) -> a</span></span>
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<pre style="margin: 0;">-<span id="LC343" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">that I have finally given in and written a special type-checking</span></span>
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<pre style="margin: 0;">-<span id="LC344" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">rule just for saturated applications of ($).</span></span>
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<pre style="margin: 0;">-<span id="LC345" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> * Infer the type of the first argument</span></span>
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<pre style="margin: 0;">-<span id="LC346" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> * Decompose it; should be of form (arg2_ty -> res_ty),</span></span>
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<pre style="margin: 0;">-<span id="LC347" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> where arg2_ty might be a polytype</span></span>
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<pre style="margin: 0;">-<span id="LC348" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> * Use arg2_ty to typecheck arg2</span></span>
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<pre style="margin: 0;"> <span id="LC336" 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="LC337" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC338" class="line" lang="haskell"><span class="n" style="color: #333;">tcExpr</span> <span class="n" style="color: #333;">expr</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">OpApp</span> <span class="p">{})</span> <span class="n" style="color: #333;">res_ty</span></span>
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<pre style="margin: 0;"> <span id="LC339" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcApp</span> <span class="n" style="color: #333;">expr</span> <span class="n" style="color: #333;">res_ty</span></span>
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<pre style="margin: 0;">-<span id="LC353" 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="LC354" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">tcExpr expr@(OpApp fix arg1 op arg2) res_ty</span></span>
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<pre style="margin: 0;">-<span id="LC355" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> | (L loc (HsVar _ (L lv op_name))) <- op</span></span>
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<pre style="margin: 0;">-<span id="LC356" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> , op_name `hasKey` dollarIdKey -- Note [Typing rule for ($)]</span></span>
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<pre style="margin: 0;">-<span id="LC357" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> = do {</span></span>
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<pre style="margin: 0;">-<span id="LC358" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> traceTc "Application rule" (ppr op)</span></span>
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<pre style="margin: 0;">-<span id="LC359" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; (arg1', arg1_ty) <- addErrCtxt (funAppCtxt op arg1 1) $</span></span>
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<pre style="margin: 0;">-<span id="LC360" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> tcInferRhoNC arg1</span></span>
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<pre style="margin: 0;">-<span id="LC361" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC362" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; let doc = text "The first argument of ($) takes"</span></span>
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<pre style="margin: 0;">-<span id="LC363" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> orig1 = lexprCtOrigin arg1</span></span>
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<pre style="margin: 0;">-<span id="LC364" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; (wrap_arg1, [arg2_sigma], op_res_ty) <-</span></span>
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365
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<pre style="margin: 0;">-<span id="LC365" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> matchActualFunTysRho doc orig1 (Just (unLoc arg1)) 1 arg1_ty</span></span>
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366
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<pre style="margin: 0;">-<span id="LC366" class="line" lang="haskell"></span>
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367
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<pre style="margin: 0;">-<span id="LC367" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- We have (arg1 $ arg2)</span></span>
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368
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<pre style="margin: 0;">-<span id="LC368" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- So: arg1_ty = arg2_ty -> op_res_ty</span></span>
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369
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<pre style="margin: 0;">-<span id="LC369" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- where arg2_sigma maybe polymorphic; that's the point</span></span>
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370
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<pre style="margin: 0;">-<span id="LC370" class="line" lang="haskell"></span>
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371
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<pre style="margin: 0;">-<span id="LC371" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; arg2' <- tcValArg nl_op arg2 arg2_sigma 2</span></span>
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372
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<pre style="margin: 0;">-<span id="LC372" class="line" lang="haskell"></span>
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373
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<pre style="margin: 0;">-<span id="LC373" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- Make sure that the argument type has kind '*'</span></span>
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374
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<pre style="margin: 0;">-<span id="LC374" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- ($) :: forall (r:RuntimeRep) (a:*) (b:TYPE r). (a->b) -> a -> b</span></span>
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375
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<pre style="margin: 0;">-<span id="LC375" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- Eg we do not want to allow (D# $ 4.0#) #5570</span></span>
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376
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<pre style="margin: 0;">-<span id="LC376" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- (which gives a seg fault)</span></span>
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377
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<pre style="margin: 0;">-<span id="LC377" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; _ <- unifyKind (Just (XHsType $ NHsCoreTy arg2_sigma))</span></span>
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378
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<pre style="margin: 0;">-<span id="LC378" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> (tcTypeKind arg2_sigma) liftedTypeKind</span></span>
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379
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<pre style="margin: 0;">-<span id="LC379" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- Ignore the evidence. arg2_sigma must have type * or #,</span></span>
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380
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<pre style="margin: 0;">-<span id="LC380" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- because we know (arg2_sigma -> op_res_ty) is well-kinded</span></span>
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381
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<pre style="margin: 0;">-<span id="LC381" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- (because otherwise matchActualFunTysRho would fail)</span></span>
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382
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<pre style="margin: 0;">-<span id="LC382" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- So this 'unifyKind' will either succeed with Refl, or will</span></span>
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383
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<pre style="margin: 0;">-<span id="LC383" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- produce an insoluble constraint * ~ #, which we'll report later.</span></span>
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384
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<pre style="margin: 0;">-<span id="LC384" class="line" lang="haskell"></span>
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385
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<pre style="margin: 0;">-<span id="LC385" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- NB: unlike the argument type, the *result* type, op_res_ty can</span></span>
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<pre style="margin: 0;">-<span id="LC386" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- have any kind (#8739), so we don't need to check anything for that</span></span>
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<pre style="margin: 0;">-<span id="LC387" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC388" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; op_id <- tcLookupId op_name</span></span>
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<pre style="margin: 0;">-<span id="LC389" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; let op' = L loc (mkHsWrap (mkWpTyApps [ getRuntimeRep op_res_ty</span></span>
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390
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<pre style="margin: 0;">-<span id="LC390" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> , arg2_sigma</span></span>
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391
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<pre style="margin: 0;">-<span id="LC391" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> , op_res_ty])</span></span>
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392
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<pre style="margin: 0;">-<span id="LC392" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> (HsVar noExtField (L lv op_id)))</span></span>
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393
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<pre style="margin: 0;">-<span id="LC393" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- arg1' :: arg1_ty</span></span>
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<pre style="margin: 0;">-<span id="LC394" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- wrap_arg1 :: arg1_ty "->" (arg2_sigma -> op_res_ty)</span></span>
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<pre style="margin: 0;">-<span id="LC395" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- op' :: (a2_ty -> op_res_ty) -> a2_ty -> op_res_ty</span></span>
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<pre style="margin: 0;">-<span id="LC396" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC397" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> expr' = OpApp fix (mkLHsWrap wrap_arg1 arg1') op' arg2'</span></span>
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<pre style="margin: 0;">-<span id="LC398" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC399" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; tcWrapResult expr expr' op_res_ty res_ty }</span></span>
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400
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<pre style="margin: 0;">-<span id="LC400" class="line" lang="haskell"></span>
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401
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<pre style="margin: 0;">-<span id="LC401" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> | L loc (HsRecFld _ (Ambiguous _ lbl)) <- op</span></span>
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402
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<pre style="margin: 0;">-<span id="LC402" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> , Just sig_ty <- obviousSig (unLoc arg1)</span></span>
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403
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<pre style="margin: 0;">-<span id="LC403" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- See Note [Disambiguating record fields]</span></span>
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404
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<pre style="margin: 0;">-<span id="LC404" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> = do { sig_tc_ty <- tcHsSigWcType ExprSigCtxt sig_ty</span></span>
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405
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<pre style="margin: 0;">-<span id="LC405" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; sel_name <- disambiguateSelector lbl sig_tc_ty</span></span>
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406
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<pre style="margin: 0;">-<span id="LC406" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; let op' = L loc (HsRecFld noExtField (Unambiguous sel_name lbl))</span></span>
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407
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<pre style="margin: 0;">-<span id="LC407" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; tcExpr (OpApp fix arg1 op' arg2) res_ty</span></span>
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408
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<pre style="margin: 0;">-<span id="LC408" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> }</span></span>
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409
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<pre style="margin: 0;">-<span id="LC409" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC410" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> | otherwise</span></span>
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<pre style="margin: 0;">-<span id="LC411" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> = do { traceTc "Non Application rule" (ppr op)</span></span>
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<pre style="margin: 0;">-<span id="LC412" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; (op', op_ty) <- tcInferRhoNC op</span></span>
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<pre style="margin: 0;">-<span id="LC413" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC414" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; (wrap_fun, [arg1_ty, arg2_ty], op_res_ty)</span></span>
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<pre style="margin: 0;">-<span id="LC415" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> <- matchActualFunTysRho (mk_op_msg op) fn_orig</span></span>
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<pre style="margin: 0;">-<span id="LC416" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> (Just (unLoc op)) 2 op_ty</span></span>
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<pre style="margin: 0;">-<span id="LC417" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- You might think we should use tcInferApp here, but there is</span></span>
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<pre style="margin: 0;">-<span id="LC418" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- too much impedance-matching, because tcApp may return wrappers as</span></span>
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<pre style="margin: 0;">-<span id="LC419" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> -- well as type-checked arguments.</span></span>
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420
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<pre style="margin: 0;">-<span id="LC420" class="line" lang="haskell"></span>
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421
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<pre style="margin: 0;">-<span id="LC421" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; arg1' <- tcValArg nl_op arg1 arg1_ty 1</span></span>
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<pre style="margin: 0;">-<span id="LC422" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; arg2' <- tcValArg nl_op arg2 arg2_ty 2</span></span>
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<pre style="margin: 0;">-<span id="LC423" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC424" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; let expr' = OpApp fix arg1' (mkLHsWrap wrap_fun op') arg2'</span></span>
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425
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<pre style="margin: 0;">-<span id="LC425" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ; tcWrapResult expr expr' op_res_ty res_ty }</span></span>
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<pre style="margin: 0;">-<span id="LC426" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> where</span></span>
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<pre style="margin: 0;">-<span id="LC427" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> fn_orig = exprCtOrigin nl_op</span></span>
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<pre style="margin: 0;">-<span id="LC428" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> nl_op = unLoc op</span></span>
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<pre style="margin: 0;">-<span id="LC429" 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="LC340" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC341" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Right sections, equivalent to \ x -> x `op` expr, or</span></span>
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<pre style="margin: 0;"> <span id="LC342" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- \ x -> op x expr</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">@@ -14,7 +14,7 @@</td>
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<pre style="margin: 0;"> <span id="LC14" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.Unify</span> <span class="p">(</span></span>
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<pre style="margin: 0;"> <span id="LC15" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Full-blown subsumption</span></span>
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<pre style="margin: 0;"> <span id="LC16" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">tcWrapResult</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcWrapResultO</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcWrapResultMono</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC17" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">tcSkolemise</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcSkolemiseScoped</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcSkolemiseET</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">tcSkolemise</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcSkolemiseScoped</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcSkolemise<span class="idiff left">Always</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">tcSkolemise</span>ET</span><span class="p">,</span></span>
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18
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<pre style="margin: 0;"> <span id="LC18" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">tcSubType</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcSubTypeSigma</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcSubTypePat</span><span class="p">,</span></span>
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19
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<pre style="margin: 0;"> <span id="LC19" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">checkConstraints</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">checkTvConstraints</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC20" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">buildImplicationFor</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">buildTvImplication</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">emitResidualTvConstraint</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">@@ -960,7 +960,7 @@ tcSkolemiseScoped is very similar, but differs in two ways:</td>
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960
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<pre style="margin: 0;"> <span id="LC960" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> See Note [When to build an implication] below.</span></span>
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961
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961
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<pre style="margin: 0;"> <span id="LC961" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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962
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962
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<pre style="margin: 0;"> <span id="LC962" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC963" class="line" lang="haskell"><span class="n" style="color: #333;">tcSkolemise</span><span class="p">,</span> <span class="n" style="color: #333;">tcSkolemiseScoped</span></span>
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<pre style="margin: 0;">+<span id="LC963" class="line" lang="haskell"><span class="n" style="color: #333;">tcSkolemise</span><span class="p">,</span> <span class="n" style="color: #333;">tcSkolemiseScoped</span><span class="p"><span class="idiff left">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">tcSkolemiseAlways</span></span></span>
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964
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<pre style="margin: 0;"> <span id="LC964" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">UserTypeCtxt</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcSigmaType</span></span>
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965
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965
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<pre style="margin: 0;"> <span id="LC965" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TcType</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="n" style="color: #333;">result</span><span class="p">)</span></span>
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966
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<pre style="margin: 0;"> <span id="LC966" 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;">HsWrapper</span><span class="p">,</span> <span class="n" style="color: #333;">result</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">@@ -983,6 +983,9 @@ tcSkolemise ctxt expected_ty thing_inside</td>
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983
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<pre style="margin: 0;"> <span id="LC983" 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;">res</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">thing_inside</span> <span class="n" style="color: #333;">expected_ty</span></span>
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984
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984
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<pre style="margin: 0;"> <span id="LC984" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">idHsWrapper</span><span class="p">,</span> <span class="n" style="color: #333;">res</span><span class="p">)</span> <span class="p">}</span></span>
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985
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<pre style="margin: 0;"> <span id="LC985" 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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<pre style="margin: 0;">+<span id="LC986" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcSkolemiseAlways</span> <span class="n" style="color: #333;">ctxt</span> <span class="n" style="color: #333;">expected_ty</span> <span class="n" style="color: #333;">thing_inside</span></span>
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<pre style="margin: 0;">+<span id="LC987" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC988" class="line" lang="haskell"><span class="n" style="color: #333;">tcSkolemiseAlways</span> <span class="n" style="color: #333;">ctxt</span> <span class="n" style="color: #333;">expected_ty</span> <span class="n" style="color: #333;">thing_inside</span></span>
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989
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<pre style="margin: 0;"> <span id="LC989" 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;">wrap</span><span class="p">,</span> <span class="n" style="color: #333;">tv_prs</span><span class="p">,</span> <span class="n" style="color: #333;">given</span><span class="p">,</span> <span class="n" style="color: #333;">rho_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">topSkolemise</span> <span class="n" style="color: #333;">expected_ty</span></span>
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990
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<pre style="margin: 0;"> <span id="LC990" class="line" lang="haskell"></span>
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991
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<pre style="margin: 0;"> <span id="LC991" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">skol_tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">snd</span> <span class="n" style="color: #333;">tv_prs</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">@@ -1156,7 +1159,7 @@ take care:</td>
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1159
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<pre style="margin: 0;"> <span id="LC1159" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> [W] C Int b2 -- from g_blan</span></span>
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1157
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1160
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<pre style="margin: 0;"> <span id="LC1160" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> and fundpes can yield [D] b1 ~ b2, even though the two functions have</span></span>
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1158
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1161
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<pre style="margin: 0;"> <span id="LC1161" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> literally nothing to do with each other. #14185 is an example.</span></span>
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1159
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<pre style="margin: 0;">-<span id="LC1159" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Building an implication keeps them separa<span class="idiff left right">g</span>e.</span></span>
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1162
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<pre style="margin: 0;">+<span id="LC1162" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Building an implication keeps them separa<span class="idiff left right">t</span>e.</span></span>
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1163
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<pre style="margin: 0;"> <span id="LC1163" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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1161
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1164
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<pre style="margin: 0;"> <span id="LC1164" class="line" lang="haskell"></span>
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1165
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<pre style="margin: 0;"> <span id="LC1165" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eae80258c718ee303910818acf715e78a98a7f59#ff2cc6d26d8fa6a7c9a4f742835d78733da57656"><strong>testsuite/tests/impredicative/icfp20-ok.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">@@ -69,3 +69,6 @@ d4 = runST $ argST</td>
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69
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69
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<pre style="margin: 0;"> <span id="LC69" class="line" lang="haskell"></span>
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70
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70
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<pre style="margin: 0;"> <span id="LC70" class="line" lang="haskell"><span class="n" style="color: #333;">st1</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">forall</span> <span class="n" style="color: #333;">a</span><span class="o" style="font-weight: 600;">.</span> <span class="p">(</span><span class="n" style="color: #333;">forall</span> <span class="n" style="color: #333;">s</span><span class="o" style="font-weight: 600;">.</span> <span class="kt" style="color: #458; font-weight: 600;">ST</span> <span class="n" style="color: #333;">s</span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span></span>
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71
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71
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<pre style="margin: 0;"> <span id="LC71" class="line" lang="haskell"><span class="n" style="color: #333;">st1</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">id</span> <span class="p">(</span><span class="n" style="color: #333;">runST</span> <span class="o" style="font-weight: 600;">@</span><span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="n" style="color: #333;">x</span></span>
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72
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<pre style="margin: 0;">+<span id="LC72" class="line" lang="haskell"></span>
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73
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<pre style="margin: 0;">+<span id="LC73" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Not in the paper's table</span></span>
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74
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<pre style="margin: 0;">+<span id="LC74" class="line" lang="haskell"><span class="n" style="color: #333;">c10</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">head</span> <span class="n" style="color: #333;">ids</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eae80258c718ee303910818acf715e78a98a7f59#8b444fd335d9ab139a61bae54502166f4b7f6847"><strong>testsuite/tests/typecheck/should_fail/tcfail133.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">@@ -14,8 +14,7 @@ tcfail133.hs:68:7: error:</td>
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14
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14
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<pre style="margin: 0;"> <span id="LC14" class="line" lang="plaintext"> ...plus 25 others</span>
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<pre style="margin: 0;"> <span id="LC15" class="line" lang="plaintext"> ...plus 12 instances involving out-of-scope types</span>
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<pre style="margin: 0;"> <span id="LC16" class="line" lang="plaintext"> (use -fprint-potential-instances to see them all)</span>
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<pre style="margin: 0;">-<span id="LC17" class="line" lang="plaintext"> • In the first argument of ‘($)’, namely ‘show’</span>
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<pre style="margin: 0;">-<span id="LC18" class="line" lang="plaintext"> In the expression: show $ add (One :@ Zero) (One :@ One)</span>
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<pre style="margin: 0;">+<span id="LC17" class="line" lang="plaintext"> • In the expression: show $ add (One :@ Zero) (One :@ One)</span>
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<pre style="margin: 0;"> <span id="LC18" class="line" lang="plaintext"> In an equation for ‘foo’:</span>
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<pre style="margin: 0;"> <span id="LC19" class="line" lang="plaintext"> foo = show $ add (One :@ Zero) (One :@ One)</span>
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<pre style="margin: 0;"> <span id="LC20" class="line" lang="plaintext"></span>
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