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<h3>

 Marge Bot pushed to branch master

at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>

</h3>

<h4>

Commits:

</h4>

<ul>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ede241268171e8eee1e750d88ff356ddbfc357f2">ede24126</a></strong>

<div>

<span>by Takenobu Tani</span>

<i>at 2020-05-27T00:13:55-04:00</i>

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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">core-spec: Modify file paths according to new module hierarchy

This patch updates file paths according to new module hierarchy [1]:

  * GHC/Core.hs                <= coreSyn/CoreSyn.hs

  * GHC/Core/Coercion.hs       <= types/Coercion.hs

  * GHC/Core/Coercion/Axiom.hs <= types/CoAxiom.hs

  * GHC/Core/Coercion/Opt.hs   <= types/OptCoercion.hs

  * GHC/Core/DataCon.hs        <= basicTypes/DataCon.hs

  * GHC/Core/FamInstEnv.hs     <= types/FamInstEnv.hs

  * GHC/Core/Lint.hs           <= coreSyn/CoreLint.hs

  * GHC/Core/Subst.hs          <= coreSyn/CoreSubst.hs

  * GHC/Core/TyCo/Rep.hs       <= types/TyCoRep.hs

  * GHC/Core/TyCon.hs          <= types/TyCon.hs

  * GHC/Core/Type.hs           <= types/Type.hs

  * GHC/Core/Unify.hs          <= types/Unify.hs

  * GHC/Types/Literal.hs       <= basicTypes/Literal.hs

  * GHC/Types/Var.hs           <= basicTypes/Var.hs

[1]: https://gitlab.haskell.org/ghc/ghc/-/wikis/Make-GHC-codebase-more-modular

[skip ci]

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<h4>5 changed files:</h4>

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<a href="#f740374ad9d1ce333c9d2992b2feda632e24371f">

docs/core-spec/CoreLint.ott

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<a href="#560a2a2363bd7c0d01f90fdb07e153565ada8556">

docs/core-spec/CoreSyn.ott

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<a href="#a088d80ab8c32a211cb927ba7d489370cd5eb4fe">

docs/core-spec/README

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<a href="#7dc5395d86b92c5a2b05aa2e9c13c1635f051da8">

docs/core-spec/core-spec.mng

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<a href="#992e7eb1bd13e4d31f52ca068190ea73dba7e829">

docs/core-spec/core-spec.pdf

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<h4>Changes:</h4>

<li id="f740374ad9d1ce333c9d2992b2feda632e24371f">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ede241268171e8eee1e750d88ff356ddbfc357f2#f740374ad9d1ce333c9d2992b2feda632e24371f"><strong>docs/core-spec/CoreLint.ott</strong></a>

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<pre style="margin: 0;"> <span id="LC13" class="line" lang="plaintext">CoreLint :: '' ::=</span>

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<pre style="margin: 0;">-<span id="LC15" class="line" lang="plaintext">defn |- prog program ::  :: lintCoreBindings :: 'Prog_' {{ com Program typing, \coderef{<span class="idiff left right">coreSyn/Core</span>Lint.hs}{lintCoreBindings} }}</span>

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<pre style="margin: 0;">+<span id="LC15" class="line" lang="plaintext">defn |- prog program ::  :: lintCoreBindings :: 'Prog_' {{ com Program typing, \coderef{<span class="idiff left right">GHC/Core/</span>Lint.hs}{lintCoreBindings} }}</span>

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<pre style="margin: 0;"> <span id="LC16" class="line" lang="plaintext">  {{ tex \labeledjudge{prog} [[program]] }}</span>

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<pre style="margin: 0;"> <span id="LC17" class="line" lang="plaintext">by</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">@@ -22,7 +22,7 @@ no_duplicates </ bindingi // i /></td>

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<pre style="margin: 0;"> <span id="LC22" class="line" lang="plaintext">--------------------- :: CoreBindings</span>

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<pre style="margin: 0;"> <span id="LC23" class="line" lang="plaintext">|-prog </ bindingi // i /></span>

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<pre style="margin: 0;">-<span id="LC25" class="line" lang="plaintext">defn G |- bind binding ::  :: lint_bind :: 'Binding_' {{ com Binding typing, \coderef{<span class="idiff left right">coreSyn/Core</span>Lint.hs}{lint\_bind} }}</span>

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<pre style="margin: 0;">+<span id="LC25" class="line" lang="plaintext">defn G |- bind binding ::  :: lint_bind :: 'Binding_' {{ com Binding typing, \coderef{<span class="idiff left right">GHC/Core/</span>Lint.hs}{lint\_bind} }}</span>

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<pre style="margin: 0;"> <span id="LC26" class="line" lang="plaintext">  {{ tex [[G]] \labeledjudge{bind} [[binding]] }}</span>

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<pre style="margin: 0;"> <span id="LC27" class="line" lang="plaintext">by</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">@@ -34,7 +34,7 @@ G |-bind n = e</td>

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<pre style="margin: 0;"> <span id="LC34" class="line" lang="plaintext">---------------------- :: Rec</span>

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<pre style="margin: 0;"> <span id="LC35" class="line" lang="plaintext">G |-bind rec </ ni = ei // i /></span>

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<pre style="margin: 0;"> <span id="LC36" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC37" class="line" lang="plaintext">defn G  |- sbind n <- e ::  :: lintSingleBinding :: 'SBinding_' {{ com Single binding typing, \coderef{<span class="idiff left right">coreSyn/Core</span>Lint.hs}{lintSingleBinding} }}</span>

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<pre style="margin: 0;">+<span id="LC37" class="line" lang="plaintext">defn G  |- sbind n <- e ::  :: lintSingleBinding :: 'SBinding_' {{ com Single binding typing, \coderef{<span class="idiff left right">GHC/Core/</span>Lint.hs}{lintSingleBinding} }}</span>

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<pre style="margin: 0;"> <span id="LC38" class="line" lang="plaintext">  {{ tex [[G]] \labeledjudge{sbind} [[n]] [[<-]] [[e]] }}</span>

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<pre style="margin: 0;"> <span id="LC39" class="line" lang="plaintext">by</span>

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<pre style="margin: 0;"> <span id="LC40" class="line" lang="plaintext"></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">@@ -45,7 +45,7 @@ G |-name z_t ok</td>

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<pre style="margin: 0;"> <span id="LC45" class="line" lang="plaintext">----------------- :: SingleBinding</span>

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<pre style="margin: 0;"> <span id="LC46" class="line" lang="plaintext">G |-sbind z_t <- e</span>

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<pre style="margin: 0;"> <span id="LC47" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC48" class="line" lang="plaintext">defn G ; D |-sjbind l vars <- e : t ::  :: lintSingleBinding_joins :: 'SJBinding_' {{ com Single join binding typing, \coderef{<span class="idiff left right">coreSyn/Core</span>Lint.hs}{lintSingleBinding} }}</span>

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<pre style="margin: 0;">+<span id="LC48" class="line" lang="plaintext">defn G ; D |-sjbind l vars <- e : t ::  :: lintSingleBinding_joins :: 'SJBinding_' {{ com Single join binding typing, \coderef{<span class="idiff left right">GHC/Core/</span>Lint.hs}{lintSingleBinding} }}</span>

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<td class="diff-line-num old_line" data-linenumber="49" 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="LC49" class="line" lang="plaintext">  {{ tex [[G]];[[D]] \labeledjudge{sjbind} [[l]] \, [[vars]] [[<-]] [[e]] : [[t]] }}</span>

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<pre style="margin: 0;"> <span id="LC50" class="line" lang="plaintext">by</span>

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<pre style="margin: 0;"> <span id="LC51" class="line" lang="plaintext"></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">@@ -60,7 +60,7 @@ split_I s = </ sj // j /> t</td>

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<pre style="margin: 0;"> <span id="LC60" class="line" lang="plaintext">G; D |-sjbind p/I_s </ nj // j /> <- e : t</span>

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<pre style="margin: 0;"> <span id="LC61" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC62" class="line" lang="plaintext">defn G ; D  |- tm e : t ::  :: lintCoreExpr :: 'Tm_'</span>

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<pre style="margin: 0;">-<span id="LC63" class="line" lang="plaintext">  {{ com Expression typing, \coderef{<span class="idiff left right">coreSyn/Core</span>Lint.hs}{lintCoreExpr} }}</span>

</pre>

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<pre style="margin: 0;">+<span id="LC63" class="line" lang="plaintext">  {{ com Expression typing, \coderef{<span class="idiff left right">GHC/Core/</span>Lint.hs}{lintCoreExpr} }}</span>

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<pre style="margin: 0;"> <span id="LC64" class="line" lang="plaintext">  {{ tex [[G]]; [[D]] \labeledjudge{tm} [[e]] : [[t]] }}</span>

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<pre style="margin: 0;"> <span id="LC65" class="line" lang="plaintext">by</span>

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<pre style="margin: 0;"> <span id="LC66" class="line" lang="plaintext"></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="171" 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="171" 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">@@ -171,7 +171,7 @@ G |-co g : t1 k1~Rep k2 t2</td>

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<pre style="margin: 0;"> <span id="LC171" class="line" lang="plaintext">G; D |-tm g : (~Rep#) k1 k2 t1 t2</span>

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<pre style="margin: 0;"> <span id="LC172" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="173" 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="LC173" class="line" lang="plaintext">defn G  |- name n ok ::  :: lintSingleBinding_lintBinder :: 'Name_'</span>

</pre>

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<pre style="margin: 0;">-<span id="LC174" class="line" lang="plaintext">  {{ com Name consistency check, \coderef{<span class="idiff left right">coreSyn/Core</span>Lint.hs}{lintSingleBinding\#lintBinder} }}</span>

</pre>

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<pre style="margin: 0;">+<span id="LC174" class="line" lang="plaintext">  {{ com Name consistency check, \coderef{<span class="idiff left right">GHC/Core/</span>Lint.hs}{lintSingleBinding\#lintBinder} }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC175" class="line" lang="plaintext">  {{ tex [[G]] \labeledjudge{n} [[n]] [[ok]] }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC176" class="line" lang="plaintext">by</span>

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<td class="diff-line-num old_line" data-linenumber="177" 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="LC177" class="line" lang="plaintext"></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="184" 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="184" 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">@@ -184,7 +184,7 @@ G |-name x_t ok</td>

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<pre style="margin: 0;"> <span id="LC184" class="line" lang="plaintext">G |-name alpha_k ok</span>

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<td class="diff-line-num old_line" data-linenumber="185" 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="LC185" class="line" lang="plaintext"></span>

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<td class="diff-line-num old_line" data-linenumber="186" 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="LC186" class="line" lang="plaintext">defn G |- label l ok ::  :: lintSingleBinding_lintBinder_join :: 'Label_'</span>

</pre>

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<pre style="margin: 0;">-<span id="LC187" class="line" lang="plaintext">  {{ com Label consistency check, \coderef{<span class="idiff left right">coreSyn/Core</span>Lint.hs}{lintSingleBinding\#lintBinder} }}</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="188" 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="187" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC187" class="line" lang="plaintext">  {{ com Label consistency check, \coderef{<span class="idiff left right">GHC/Core/</span>Lint.hs}{lintSingleBinding\#lintBinder} }}</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="188" 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="LC188" class="line" lang="plaintext">  {{ tex [[G]] \labeledjudge{label} [[l]] [[ok]] }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC189" class="line" lang="plaintext">by</span>

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<pre style="margin: 0;"> <span id="LC190" class="line" lang="plaintext"></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="197" 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="197" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -197,7 +197,7 @@ k' = * \/ k' = #</td>

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<pre style="margin: 0;"> <span id="LC197" class="line" lang="plaintext">G |-label p / I _ t ok</span>

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<pre style="margin: 0;"> <span id="LC198" class="line" lang="plaintext"></span>

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<td class="diff-line-num old_line" data-linenumber="199" 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="LC199" class="line" lang="plaintext">defn G |- bnd n ok ::  :: lintBinder :: 'Binding_'</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="200" 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="LC200" class="line" lang="plaintext">  {{ com Binding consistency, \coderef{<span class="idiff left right">coreSyn/Core</span>Lint.hs}{lintBinder} }}</span>

</pre>

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<td class="diff-line-num new old_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">

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<pre style="margin: 0;">+<span id="LC200" class="line" lang="plaintext">  {{ com Binding consistency, \coderef{<span class="idiff left right">GHC/Core/</span>Lint.hs}{lintBinder} }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC201" class="line" lang="plaintext">  {{ tex [[G]] \labeledjudge{bnd} [[n]] [[ok]] }}</span>

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<pre style="margin: 0;"> <span id="LC202" class="line" lang="plaintext">by</span>

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<pre style="margin: 0;"> <span id="LC203" class="line" lang="plaintext"></span>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="211" 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">@@ -211,7 +211,7 @@ G |-ki k ok</td>

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<pre style="margin: 0;"> <span id="LC211" class="line" lang="plaintext">G |-bnd alpha_k ok</span>

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<pre style="margin: 0;"> <span id="LC212" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC213" class="line" lang="plaintext">defn G  |- co g : t1 k1 ~ R k2 t2 ::  :: lintCoercion :: 'Co_'</span>

</pre>

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<pre style="margin: 0;">-<span id="LC214" class="line" lang="plaintext">  {{ com Coercion typing, \coderef{<span class="idiff left right">coreSyn/Core</span>Lint.hs}{lintCoercion} }}</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="215" 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="214" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC214" class="line" lang="plaintext">  {{ com Coercion typing, \coderef{<span class="idiff left right">GHC/Core/</span>Lint.hs}{lintCoercion} }}</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="215" 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="LC215" class="line" lang="plaintext">  {{ tex [[G]] \labeledjudge{co} [[g]] : [[t1]] \mathop{ {}^{[[k1]]} {\sim}_{[[R]]}^{[[k2]]} } [[t2]] }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC216" class="line" lang="plaintext">by</span>

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<td class="diff-line-num old_line" data-linenumber="217" 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="LC217" class="line" lang="plaintext"></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="375" 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="375" 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">@@ -375,7 +375,7 @@ G |-ty t'2 : k0'</td>

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<pre style="margin: 0;"> <span id="LC375" class="line" lang="plaintext">G |-co mu </ ti // i /> $ </ gj // j /> : t'1 k0 ~R' k0' t'2</span>

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<pre style="margin: 0;"> <span id="LC376" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC377" class="line" lang="plaintext">defn G |- axk [ namesroles |-> gs ] ~> ( subst1 , subst2 ) ::  :: check_ki :: 'AxiomKind_'</span>

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<pre style="margin: 0;">-<span id="LC378" class="line" lang="plaintext">  {{ com Axiom argument kinding, \coderef{<span class="idiff left right">coreSyn/Core</span>Lint.hs}{lintCoercion\#check\_ki} }}</span>

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<pre style="margin: 0;">+<span id="LC378" class="line" lang="plaintext">  {{ com Axiom argument kinding, \coderef{<span class="idiff left right">GHC/Core/</span>Lint.hs}{lintCoercion\#check\_ki} }}</span>

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<pre style="margin: 0;"> <span id="LC379" class="line" lang="plaintext">  {{ tex [[G]] \labeledjudge{axk} [ [[namesroles]] [[|->]] [[gs]] ] [[~>]] ([[subst1]], [[subst2]]) }}</span>

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<pre style="margin: 0;"> <span id="LC380" class="line" lang="plaintext">by</span>

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<pre style="margin: 0;"> <span id="LC381" class="line" lang="plaintext"></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">@@ -451,7 +451,7 @@ O |- t |> g : R</td>

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<pre style="margin: 0;"> <span id="LC451" class="line" lang="plaintext">O |- g : Ph</span>

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<pre style="margin: 0;"> <span id="LC452" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC453" class="line" lang="plaintext">defn R1 <= R2 ::  :: ltRole :: 'Rlt_'</span>

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<pre style="margin: 0;">-<span id="LC454" class="line" lang="plaintext">  {{ com Sub-role relation, \coderef{<span class="idiff left right">types</span>/Coercion.hs}{ltRole} }}</span>

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<pre style="margin: 0;">+<span id="LC454" class="line" lang="plaintext">  {{ com Sub-role relation, \coderef{<span class="idiff left right">GHC/Core</span>/Coercion.hs}{ltRole} }}</span>

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<pre style="margin: 0;"> <span id="LC455" class="line" lang="plaintext">  {{ tex [[R1]] \leq [[R2]] }}</span>

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<pre style="margin: 0;"> <span id="LC456" class="line" lang="plaintext">by</span>

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<pre style="margin: 0;"> <span id="LC457" class="line" lang="plaintext"></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="465" 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="465" 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">@@ -465,7 +465,7 @@ R <= Ph</td>

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<pre style="margin: 0;"> <span id="LC465" class="line" lang="plaintext">R <= R</span>

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<pre style="margin: 0;"> <span id="LC466" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC467" class="line" lang="plaintext">defn G |- ki k ok ::  :: lintKind :: 'K_'</span>

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<pre style="margin: 0;">-<span id="LC468" class="line" lang="plaintext">  {{ com Kind validity, \coderef{<span class="idiff left right">coreSyn/Core</span>Lint.hs}{lintKind} }}</span>

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<td class="diff-line-num new new_line" data-linenumber="468" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC468" class="line" lang="plaintext">  {{ com Kind validity, \coderef{<span class="idiff left right">GHC/Core/</span>Lint.hs}{lintKind} }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC469" class="line" lang="plaintext">  {{ tex [[G]] \labeledjudge{k} [[k]] [[ok]] }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC470" class="line" lang="plaintext">by</span>

</pre>

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471

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<pre style="margin: 0;"> <span id="LC471" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="478" 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="478" 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">@@ -478,7 +478,7 @@ G |-ty k : #</td>

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<pre style="margin: 0;"> <span id="LC478" class="line" lang="plaintext">G |-ki k ok</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="479" 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="LC479" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="480" 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="LC480" class="line" lang="plaintext">defn G |- ty t : k ::  :: lintType :: 'Ty_'</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="481" 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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<td class="diff-line-num new_line old" data-linenumber="481" 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="LC481" class="line" lang="plaintext">  {{ com Kinding, \coderef{<span class="idiff left right">coreSyn/Core</span>Lint.hs}{lintType} }}</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="482" 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="481" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC481" class="line" lang="plaintext">  {{ com Kinding, \coderef{<span class="idiff left right">GHC/Core/</span>Lint.hs}{lintType} }}</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="482" 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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<td class="diff-line-num new_line" data-linenumber="482" 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="LC482" class="line" lang="plaintext">  {{ tex [[G]] \labeledjudge{ty} [[t]] : [[k]] }}</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="483" 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="LC483" class="line" lang="plaintext">by</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="484" 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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<td class="diff-line-num new_line" data-linenumber="484" 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="LC484" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="535" 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="535" 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">@@ -535,7 +535,7 @@ G |-co g : t1 k1 ~Rep k2 t2</td>

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<td class="diff-line-num old_line" data-linenumber="535" 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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<td class="diff-line-num new_line" data-linenumber="535" 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="LC535" class="line" lang="plaintext">G |-ty g : (~Rep#) k1 k2 t1 t2</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="536" 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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<td class="diff-line-num new_line" data-linenumber="536" 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">

536

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<pre style="margin: 0;"> <span id="LC536" class="line" lang="plaintext"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="537" 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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<td class="diff-line-num new_line" data-linenumber="537" 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="LC537" class="line" lang="plaintext">defn G |- subst n |-> t ok ::  :: lintTyKind :: 'Subst_'</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="538" 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">

538

</td>

<td class="diff-line-num new_line old" data-linenumber="538" 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="LC538" class="line" lang="plaintext">  {{ com Substitution consistency, \coderef{<span class="idiff left right">coreSyn/Core</span>Lint.hs}{lintTyKind} }}</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="539" 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">

</td>

<td class="diff-line-num new new_line" data-linenumber="538" 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">

538

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<pre style="margin: 0;">+<span id="LC538" class="line" lang="plaintext">  {{ com Substitution consistency, \coderef{<span class="idiff left right">GHC/Core/</span>Lint.hs}{lintTyKind} }}</span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="539" 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">

539

</td>

<td class="diff-line-num new_line" data-linenumber="539" 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">

539

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<pre style="margin: 0;"> <span id="LC539" class="line" lang="plaintext">  {{ tex [[G]] \labeledjudge{subst} [[n]] [[|->]] [[t]] [[ok]] }}</span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="540" 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">

540

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<td class="diff-line-num new_line" data-linenumber="540" 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">

540

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<pre style="margin: 0;"> <span id="LC540" class="line" lang="plaintext">by</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="541" 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">

541

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<td class="diff-line-num new_line" data-linenumber="541" 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">

541

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<pre style="margin: 0;"> <span id="LC541" class="line" lang="plaintext"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC544" class="line" lang="plaintext">G |-subst z_k |-> t ok</span>

</pre>

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<pre style="margin: 0;"> <span id="LC545" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC546" class="line" lang="plaintext">defn G ; D ; s |- altern alt : t ::  :: lintCoreAlt :: 'Alt_'</span>

</pre>

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<pre style="margin: 0;">-<span id="LC547" class="line" lang="plaintext">  {{ com Case alternative consistency, \coderef{<span class="idiff left right">coreSyn/Core</span>Lint.hs}{lintCoreAlt} }}</span>

</pre>

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<pre style="margin: 0;">+<span id="LC547" class="line" lang="plaintext">  {{ com Case alternative consistency, \coderef{<span class="idiff left right">GHC/Core/</span>Lint.hs}{lintCoreAlt} }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC548" class="line" lang="plaintext">  {{ tex [[G]];[[D]];[[s]] \labeledjudge{alt} [[alt]] : [[t]] }}</span>

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<pre style="margin: 0;"> <span id="LC549" class="line" lang="plaintext">by</span>

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<td class="diff-line-num old_line" data-linenumber="550" 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="LC550" class="line" lang="plaintext"></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="569" 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="569" 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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<pre style="margin: 0;"> <span id="LC569" class="line" lang="plaintext">G; D; T </ sj // j /> |-altern K </ ni // i /> -> e : t</span>

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<td class="diff-line-num old_line" data-linenumber="570" 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="LC570" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC571" class="line" lang="plaintext">defn t' = t { </ si // , // i /> } ::  :: applyTys :: 'ApplyTys_'</span>

</pre>

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<pre style="margin: 0;">-<span id="LC572" class="line" lang="plaintext">  {{ com Telescope substitution, \coderef{<span class="idiff left right">types</span>/Type.hs}{applyTys} }}</span>

</pre>

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<pre style="margin: 0;">+<span id="LC572" class="line" lang="plaintext">  {{ com Telescope substitution, \coderef{<span class="idiff left right">GHC/Core</span>/Type.hs}{applyTys} }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC573" class="line" lang="plaintext">by</span>

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<pre style="margin: 0;"> <span id="LC574" class="line" lang="plaintext"></span>

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<td class="diff-line-num old_line" data-linenumber="575" 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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<td class="diff-line-num new_line" data-linenumber="575" 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="LC575" class="line" lang="plaintext">--------------------- :: Empty</span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="581" 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">@@ -581,7 +581,7 @@ t'' = t'[n |-> s]</td>

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<pre style="margin: 0;"> <span id="LC581" class="line" lang="plaintext">t'' = (forall n. t) { s, </ si // i /> }</span>

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<pre style="margin: 0;"> <span id="LC582" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC583" class="line" lang="plaintext">defn G |- altbnd vars : t1 ~> t2 ::  :: lintAltBinders :: 'AltBinders_'</span>

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<pre style="margin: 0;">-<span id="LC584" class="line" lang="plaintext">  {{ com Case alternative binding consistency, \coderef{<span class="idiff left right">coreSyn/Core</span>Lint.hs}{lintAltBinders} }}</span>

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<pre style="margin: 0;">+<span id="LC584" class="line" lang="plaintext">  {{ com Case alternative binding consistency, \coderef{<span class="idiff left right">GHC/Core/</span>Lint.hs}{lintAltBinders} }}</span>

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<pre style="margin: 0;"> <span id="LC585" class="line" lang="plaintext">  {{ tex [[G]] \labeledjudge{altbnd} [[vars]] : [[t1]] [[~>]] [[t2]] }}</span>

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<pre style="margin: 0;"> <span id="LC586" class="line" lang="plaintext">by</span>

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<pre style="margin: 0;"> <span id="LC587" class="line" lang="plaintext"></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">@@ -602,7 +602,7 @@ G |-altbnd </ ni // i /> : t2 ~> s</td>

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<pre style="margin: 0;"> <span id="LC602" class="line" lang="plaintext">G |-altbnd x_t1, </ ni // i /> : (t1 -> t2) ~> s</span>

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<pre style="margin: 0;"> <span id="LC603" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC604" class="line" lang="plaintext">defn G |- arrow k1 -> k2 : k ::  :: lintArrow :: 'Arrow_'</span>

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<pre style="margin: 0;">-<span id="LC605" class="line" lang="plaintext">  {{ com Arrow kinding, \coderef{<span class="idiff left right">coreSyn/Core</span>Lint.hs}{lintArrow} }}</span>

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<td class="diff-line-num new old_line" data-linenumber="606" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC605" class="line" lang="plaintext">  {{ com Arrow kinding, \coderef{<span class="idiff left right">GHC/Core/</span>Lint.hs}{lintArrow} }}</span>

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<pre style="margin: 0;"> <span id="LC606" class="line" lang="plaintext">  {{ tex [[G]] \labeledjudge{\rightarrow} [[k1]] [[->]] [[k2]] : [[k]] }}</span>

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<pre style="margin: 0;"> <span id="LC607" class="line" lang="plaintext">by</span>

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<pre style="margin: 0;"> <span id="LC608" class="line" lang="plaintext"></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="612" 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="612" 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">@@ -612,7 +612,7 @@ k2 = TYPE s</td>

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<pre style="margin: 0;"> <span id="LC612" class="line" lang="plaintext">G |-arrow k1 -> k2 : *</span>

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<pre style="margin: 0;"> <span id="LC613" class="line" lang="plaintext"></span>

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<td class="diff-line-num old_line" data-linenumber="614" 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="LC614" class="line" lang="plaintext">defn G |- app kinded_types : k1 ~> k2 ::  :: lint_app :: 'App_'</span>

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<td class="diff-line-num old old_line" data-linenumber="615" 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="LC615" class="line" lang="plaintext">  {{ com Type application kinding, \coderef{<span class="idiff left right">coreSyn/Core</span>Lint.hs}{lint\_app} }}</span>

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<pre style="margin: 0;">+<span id="LC615" class="line" lang="plaintext">  {{ com Type application kinding, \coderef{<span class="idiff left right">GHC/Core/</span>Lint.hs}{lint\_app} }}</span>

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<td class="diff-line-num old_line" data-linenumber="616" 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="LC616" class="line" lang="plaintext">  {{ tex [[G]] \labeledjudge{app} [[kinded_types]] : [[k1]] [[~>]] [[k2]] }}</span>

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<pre style="margin: 0;"> <span id="LC617" class="line" lang="plaintext">by</span>

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618

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<pre style="margin: 0;"> <span id="LC618" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="628" 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="628" 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">@@ -628,7 +628,7 @@ G |-app </ (ti : ki) // i /> : k2[z_k1 |-> t] ~> k'</td>

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<pre style="margin: 0;"> <span id="LC628" class="line" lang="plaintext">G |-app (t : k1), </ (ti : ki) // i /> : (forall z_k1. k2) ~> k'</span>

</pre>

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629

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<pre style="margin: 0;"> <span id="LC629" class="line" lang="plaintext"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC630" class="line" lang="plaintext">defn no_conflict ( C , </ sj // j /> , ind1 , ind2 ) ::  :: check_no_conflict :: 'NoConflict_'</span>

</pre>

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<pre style="margin: 0;">-<span id="LC631" class="line" lang="plaintext">  {{ com \parbox{5in}{Branched axiom conflict checking, \coderef{<span class="idiff left right">types/OptCoercion.hs}{checkAxInstCo} \\ and \coderef{types</span>/FamInstEnv.hs}{compatibleBranches} } }}</span>

</pre>

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<pre style="margin: 0;">+<span id="LC631" class="line" lang="plaintext">  {{ com \parbox{5in}{Branched axiom conflict checking, \coderef{<span class="idiff left right">GHC/Core/Coercion/Opt.hs}{checkAxInstCo} \\ and \coderef{GHC/Core</span>/FamInstEnv.hs}{compatibleBranches} } }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC632" class="line" lang="plaintext">by</span>

</pre>

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<pre style="margin: 0;"> <span id="LC633" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC634" class="line" lang="plaintext">------------------------------------------------ :: NoBranch</span>

</pre>

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<br>

</li>

<li id="560a2a2363bd7c0d01f90fdb07e153565ada8556">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ede241268171e8eee1e750d88ff356ddbfc357f2#560a2a2363bd7c0d01f90fdb07e153565ada8556"><strong>docs/core-spec/CoreSyn.ott</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="34" 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="34" 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">@@ -34,19 +34,19 @@ indexvar i, j, kk {{ tex k }}, aa {{ tex a }}, bb {{ tex b }}, cc {{ tex c }} ::</td>

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34

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<pre style="margin: 0;"> <span id="LC34" class="line" lang="plaintext">grammar</span>

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<pre style="margin: 0;"> <span id="LC35" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC36" class="line" lang="plaintext">lit {{ tex \textsf{lit} }} :: 'Literal_' ::=</span>

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37

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<pre style="margin: 0;">-<span id="LC37" class="line" lang="plaintext">  {{ com Literals, \coderef{<span class="idiff left right">basic</span>Types/Literal.hs}{Literal} }}</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="38" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC37" class="line" lang="plaintext">  {{ com Literals, \coderef{<span class="idiff left right">GHC/</span>Types/Literal.hs}{Literal} }}</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="38" 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">

38

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<pre style="margin: 0;"> <span id="LC38" class="line" lang="plaintext"></span>

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<td class="diff-line-num old_line" data-linenumber="39" 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">

39

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<pre style="margin: 0;"> <span id="LC39" class="line" lang="plaintext">z :: 'Name_' ::= {{ com Term or type name }}</span>

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40

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<pre style="margin: 0;"> <span id="LC40" class="line" lang="plaintext">  | alpha           ::   :: Type    {{ com Type-level name }}</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="41" 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">

41

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41

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<pre style="margin: 0;"> <span id="LC41" class="line" lang="plaintext">  | x               ::   :: Term    {{ com Term-level name }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC42" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC43" class="line" lang="plaintext">n, m, aname {{ tex \alpha }}, xname {{ tex x }} :: 'Var_' ::= {{ com Variable names, \coderef{<span class="idiff left right">basic</span>Types/Var.hs}{Var} }}</span>

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<pre style="margin: 0;">+<span id="LC43" class="line" lang="plaintext">n, m, aname {{ tex \alpha }}, xname {{ tex x }} :: 'Var_' ::= {{ com Variable names, \coderef{<span class="idiff left right">GHC/</span>Types/Var.hs}{Var} }}</span>

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44

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<pre style="margin: 0;"> <span id="LC44" class="line" lang="plaintext">  | z _ t           ::   :: IdOrTyVar   {{ com Name, labeled with type/kind }}</span>

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<td class="diff-line-num old_line" data-linenumber="45" 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="LC45" class="line" lang="plaintext">    {{ tex {[[z]]}^{[[t]]} }}</span>

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<pre style="margin: 0;"> <span id="LC46" class="line" lang="plaintext">  | z $             :: M :: NoSupScript {{ com Name without an explicit type/kind }}</span>

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<pre style="margin: 0;"> <span id="LC47" class="line" lang="plaintext">  | K               :: M :: DataCon     {{ com Data constructor }}</span>

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<pre style="margin: 0;"> <span id="LC48" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC49" class="line" lang="plaintext">l :: 'Label_' ::= {{ com Labels for join points, also \coderef{<span class="idiff left right">basic</span>Types/Var.hs}{Var} }}</span>

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<pre style="margin: 0;">+<span id="LC49" class="line" lang="plaintext">l :: 'Label_' ::= {{ com Labels for join points, also \coderef{<span class="idiff left right">GHC/</span>Types/Var.hs}{Var} }}</span>

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<pre style="margin: 0;"> <span id="LC50" class="line" lang="plaintext">  | p / I _ t     ::   :: Label   {{ com Label with join arity and type }}</span>

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<pre style="margin: 0;"> <span id="LC51" class="line" lang="plaintext">    {{ tex  {[[p]]}_{[[I]]}^{[[t]]} }}</span>

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<pre style="margin: 0;"> <span id="LC52" class="line" lang="plaintext"></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="64" 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">@@ -64,7 +64,7 @@ labels :: 'Labels_' ::= {{ com List of labels }}</td>

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<pre style="margin: 0;"> <span id="LC64" class="line" lang="plaintext">  | </ li // , // i />       ::   :: List</span>

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<pre style="margin: 0;"> <span id="LC65" class="line" lang="plaintext">  | empty                    :: M :: empty</span>

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<pre style="margin: 0;"> <span id="LC66" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC67" class="line" lang="plaintext">e, u :: 'Expr_' ::= {{ com Expressions, \coderef{<span class="idiff left right">coreSyn/CoreSyn</span>.hs}{Expr} }}</span>

</pre>

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<pre style="margin: 0;">+<span id="LC67" class="line" lang="plaintext">e, u :: 'Expr_' ::= {{ com Expressions, \coderef{<span class="idiff left right">GHC/Core</span>.hs}{Expr} }}</span>

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<pre style="margin: 0;"> <span id="LC68" class="line" lang="plaintext">  | n                                            ::   :: Var  {{ com \ctor{Var}: Variable }}</span>

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<pre style="margin: 0;"> <span id="LC69" class="line" lang="plaintext">  | lit                                          ::   :: Lit  {{ com \ctor{Lit}: Literal }}</span>

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<pre style="margin: 0;"> <span id="LC70" class="line" lang="plaintext">  | e1 e2                                        ::   :: App  {{ com \ctor{App}: Application }}</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">@@ -85,31 +85,31 @@ e, u :: 'Expr_' ::= {{ com Expressions, \coderef{coreSyn/CoreSyn.hs}{Expr} }}</td>

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<pre style="margin: 0;"> <span id="LC85" class="line" lang="plaintext">  | \\ e                                         :: M :: Newline</span>

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<pre style="margin: 0;"> <span id="LC86" class="line" lang="plaintext">    {{ tex \qquad \\ \multicolumn{1}{r}{[[e]]} }}</span>

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<pre style="margin: 0;"> <span id="LC87" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC88" class="line" lang="plaintext">binding :: 'Bind_' ::= {{ com Let-bindings, \coderef{<span class="idiff left right">coreSyn/CoreSyn</span>.hs}{Bind} }}</span>

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<pre style="margin: 0;">+<span id="LC88" class="line" lang="plaintext">binding :: 'Bind_' ::= {{ com Let-bindings, \coderef{<span class="idiff left right">GHC/Core</span>.hs}{Bind} }}</span>

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<pre style="margin: 0;"> <span id="LC89" class="line" lang="plaintext">  | n = e                         ::   :: NonRec  {{ com \ctor{NonRec}: Non-recursive binding }}</span>

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<pre style="margin: 0;"> <span id="LC90" class="line" lang="plaintext">  | rec </ ni = ei // ;; // i /> ::   :: Rec     {{ com \ctor{Rec}: Recursive binding }}</span>

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<pre style="margin: 0;"> <span id="LC91" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC92" class="line" lang="plaintext">jbinding :: 'JoinBind_' ::= {{ com Join bindings, also \coderef{<span class="idiff left right">coreSyn/CoreSyn</span>.hs}{Bind} }}</span>

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<pre style="margin: 0;">+<span id="LC92" class="line" lang="plaintext">jbinding :: 'JoinBind_' ::= {{ com Join bindings, also \coderef{<span class="idiff left right">GHC/Core</span>.hs}{Bind} }}</span>

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<pre style="margin: 0;"> <span id="LC93" class="line" lang="plaintext">  | l </ ni // i /> = e     ::   :: NonRec {{ com \ctor{NonRec}: Non-recursive binding }}</span>

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<pre style="margin: 0;"> <span id="LC94" class="line" lang="plaintext">  | rec </ li </ nij // j /> = ei // i /> :: :: Rec {{ com \ctor{Rec}: Recursive binding }}</span>

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<pre style="margin: 0;"> <span id="LC95" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC96" class="line" lang="plaintext">alt :: 'Alt_' ::= {{ com Case alternative, \coderef{<span class="idiff left right">coreSyn/CoreSyn</span>.hs}{Alt} }}</span>

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<pre style="margin: 0;">+<span id="LC96" class="line" lang="plaintext">alt :: 'Alt_' ::= {{ com Case alternative, \coderef{<span class="idiff left right">GHC/Core</span>.hs}{Alt} }}</span>

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<pre style="margin: 0;"> <span id="LC97" class="line" lang="plaintext">  | Kp </ ni // i /> -> e    ::   :: Alt  {{ com Constructor applied to fresh names }}</span>

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<pre style="margin: 0;"> <span id="LC98" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC99" class="line" lang="plaintext">tick :: 'Tickish_' ::= {{ com Internal notes, \coderef{<span class="idiff left right">coreSyn/CoreSyn</span>.hs}{Tickish} }}</span>

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<pre style="margin: 0;">+<span id="LC99" class="line" lang="plaintext">tick :: 'Tickish_' ::= {{ com Internal notes, \coderef{<span class="idiff left right">GHC/Core</span>.hs}{Tickish} }}</span>

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<pre style="margin: 0;"> <span id="LC100" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC101" class="line" lang="plaintext">Kp {{ tex \mathbb{K} }} :: 'AltCon_' ::= {{ com Constructors used in patterns, \coderef{<span class="idiff left right">coreSyn/CoreSyn</span>.hs}{AltCon} }}</span>

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<pre style="margin: 0;">+<span id="LC101" class="line" lang="plaintext">Kp {{ tex \mathbb{K} }} :: 'AltCon_' ::= {{ com Constructors used in patterns, \coderef{<span class="idiff left right">GHC/Core</span>.hs}{AltCon} }}</span>

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<pre style="margin: 0;"> <span id="LC102" class="line" lang="plaintext">  | K        ::   :: DataAlt         {{ com \ctor{DataAlt}: Data constructor }}</span>

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<pre style="margin: 0;"> <span id="LC103" class="line" lang="plaintext">  | lit      ::   :: LitAlt          {{ com \ctor{LitAlt}: Literal (such as an integer or character) }}</span>

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<pre style="margin: 0;"> <span id="LC104" class="line" lang="plaintext">  | _        ::   :: DEFAULT         {{ com \ctor{DEFAULT}: Wildcard }}</span>

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<pre style="margin: 0;"> <span id="LC105" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC106" class="line" lang="plaintext">program :: 'CoreProgram_' ::= {{ com A System FC program, \coderef{<span class="idiff left right">coreSyn/CoreSyn</span>.hs}{CoreProgram} }}</span>

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<pre style="margin: 0;">+<span id="LC106" class="line" lang="plaintext">program :: 'CoreProgram_' ::= {{ com A System FC program, \coderef{<span class="idiff left right">GHC/Core</span>.hs}{CoreProgram} }}</span>

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<pre style="margin: 0;"> <span id="LC107" class="line" lang="plaintext">  | </ bindingi // i />  ::   :: CoreProgram  {{ com List of bindings }}</span>

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<pre style="margin: 0;"> <span id="LC108" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC109" class="line" lang="plaintext">%% TYPES %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%</span>

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<pre style="margin: 0;"> <span id="LC110" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC111" class="line" lang="plaintext">t {{ tex \tau }}, k {{ tex \kappa }}, s {{ tex \sigma }}, phi {{ tex \phi }}</span>

</pre>

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<pre style="margin: 0;">-<span id="LC112" class="line" lang="plaintext">  :: 'Type_' ::= {{ com Types/kinds, \coderef{<span class="idiff left right">types/TyCo</span>Rep.hs}{Type} }}</span>

</pre>

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<pre style="margin: 0;">+<span id="LC112" class="line" lang="plaintext">  :: 'Type_' ::= {{ com Types/kinds, \coderef{<span class="idiff left right">GHC/Core/TyCo/</span>Rep.hs}{Type} }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC113" class="line" lang="plaintext">  | n                       ::   :: TyVarTy       {{ com \ctor{TyVarTy}: Variable }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC114" class="line" lang="plaintext">  | t1 t2                   ::   :: AppTy         {{ com \ctor{AppTy}: Application }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC115" class="line" lang="plaintext">  | T </ ti // i />         ::   :: TyConApp      {{ com \ctor{TyConApp}: Application of type constructor }}</span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="118" 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="118" 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">@@ -118,12 +118,12 @@ t {{ tex \tau }}, k {{ tex \kappa }}, s {{ tex \sigma }}, phi {{ tex \phi }}</td>

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<pre style="margin: 0;"> <span id="LC118" class="line" lang="plaintext">  | lit                     ::   :: LitTy         {{ com \ctor{LitTy}: Type-level literal }}</span>

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<pre style="margin: 0;"> <span id="LC119" class="line" lang="plaintext">  | t |> g                  ::   :: CastTy        {{ com \ctor{CastTy}: Kind cast }}</span>

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<pre style="margin: 0;"> <span id="LC120" class="line" lang="plaintext">  | g                       ::   :: CoercionTy    {{ com \ctor{CoercionTy}: Coercion used in type }}</span>

</pre>

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<pre style="margin: 0;">-<span id="LC121" class="line" lang="plaintext">  | tyConKind T             :: M :: tyConKind     {{ com \coderef{<span class="idiff left right">types</span>/TyCon.hs}{tyConKind} }}</span>

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<pre style="margin: 0;">+<span id="LC121" class="line" lang="plaintext">  | tyConKind T             :: M :: tyConKind     {{ com \coderef{<span class="idiff left right">GHC/Core</span>/TyCon.hs}{tyConKind} }}</span>

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<pre style="margin: 0;"> <span id="LC122" class="line" lang="plaintext">  | t1 k1 ~# k2 t2          :: M :: unliftedEq    {{ com Metanotation for coercion types }}</span>

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<pre style="margin: 0;"> <span id="LC123" class="line" lang="plaintext">    {{ tex [[t1]] \mathop{ {}^{[[k1]]}\!\! \sim_{\#}^{[[k2]]} } [[t2]] }}</span>

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<pre style="margin: 0;"> <span id="LC124" class="line" lang="plaintext">  | t1 k1 ~Rep# k2 t2         :: M :: unliftedREq   {{ com Metanotation for coercion types }}</span>

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<pre style="margin: 0;"> <span id="LC125" class="line" lang="plaintext">    {{ tex [[t1]] \mathop{ {}^{[[k1]]}\!\! \sim_{\mathsf{R}\#}^{[[k2]]} } [[t2]] }}</span>

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<pre style="margin: 0;">-<span id="LC126" class="line" lang="plaintext">  | literalType lit         :: M :: literalType   {{ com \coderef{<span class="idiff left right">basic</span>Types/Literal.hs}{literalType} }}</span>

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<pre style="margin: 0;">+<span id="LC126" class="line" lang="plaintext">  | literalType lit         :: M :: literalType   {{ com \coderef{<span class="idiff left right">GHC/</span>Types/Literal.hs}{literalType} }}</span>

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<pre style="margin: 0;"> <span id="LC127" class="line" lang="plaintext">  | ( t )                   :: M :: parens        {{ com Parentheses }}</span>

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<pre style="margin: 0;"> <span id="LC128" class="line" lang="plaintext">  | { t }                   :: M :: IParens       {{ com Invisible parentheses }}</span>

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<pre style="margin: 0;"> <span id="LC129" class="line" lang="plaintext">    {{ tex [[t]] }}</span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="137" 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="137" 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">@@ -137,7 +137,7 @@ t {{ tex \tau }}, k {{ tex \kappa }}, s {{ tex \sigma }}, phi {{ tex \phi }}</td>

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<pre style="margin: 0;"> <span id="LC137" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC138" class="line" lang="plaintext">%% COERCIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%</span>

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<pre style="margin: 0;"> <span id="LC139" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC140" class="line" lang="plaintext">g {{ tex \gamma }}, h {{ tex \eta }} :: 'Coercion_' ::= {{ com Coercions, \coderef{<span class="idiff left right">types/TyCo</span>Rep.hs}{Coercion} }}</span>

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<pre style="margin: 0;">+<span id="LC140" class="line" lang="plaintext">g {{ tex \gamma }}, h {{ tex \eta }} :: 'Coercion_' ::= {{ com Coercions, \coderef{<span class="idiff left right">GHC/Core/TyCo/</span>Rep.hs}{Coercion} }}</span>

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<pre style="margin: 0;"> <span id="LC141" class="line" lang="plaintext">  | < t >                   ::   :: Refl          {{ com \ctor{Refl}: Nominal Reflexivity }}</span>

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<pre style="margin: 0;"> <span id="LC142" class="line" lang="plaintext">    {{ tex {\langle [[t]] \rangle} }}</span>

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<pre style="margin: 0;"> <span id="LC143" class="line" lang="plaintext">  | < t > R mg              ::   :: GRefl         {{ com \ctor{GRefl}: Generalized Reflexivity }}</span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="165" 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="165" 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">@@ -165,7 +165,7 @@ g {{ tex \gamma }}, h {{ tex \eta }} :: 'Coercion_' ::= {{ com Coercions, \coder</td>

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<pre style="margin: 0;"> <span id="LC165" class="line" lang="plaintext">  | t $ liftingsubst        :: M :: Lifted        {{ com Type lifted to coercion }}</span>

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<pre style="margin: 0;"> <span id="LC166" class="line" lang="plaintext">  | downgradeRole R g       :: M :: downgradeRole {{ com \textsf{downgradeRole} }}</span>

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<pre style="margin: 0;"> <span id="LC167" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC168" class="line" lang="plaintext">prov :: 'UnivCoProvenance_' ::= {{ com \ctor{UnivCo} provenance, \coderef{<span class="idiff left right">types/TyCo</span>Rep.hs}{UnivCoProvenance} }}</span>

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<pre style="margin: 0;">+<span id="LC168" class="line" lang="plaintext">prov :: 'UnivCoProvenance_' ::= {{ com \ctor{UnivCo} provenance, \coderef{<span class="idiff left right">GHC/Core/TyCo/</span>Rep.hs}{UnivCoProvenance} }}</span>

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<pre style="margin: 0;"> <span id="LC169" class="line" lang="plaintext">  | UnsafeCoerceProv   ::   :: UnsafeCoerceProv  {{ com From \texttt{unsafeCoerce\#} }}</span>

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<pre style="margin: 0;"> <span id="LC170" class="line" lang="plaintext">    {{ tex \mathsf{unsafe} }}</span>

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<pre style="margin: 0;"> <span id="LC171" class="line" lang="plaintext">  | PhantomProv        ::   :: PhantomProv       {{ com From the need for a phantom coercion }}</span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="173" 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="173" 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">@@ -173,20 +173,20 @@ prov :: 'UnivCoProvenance_' ::= {{ com \ctor{UnivCo} provenance, \coderef{types/</td>

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<pre style="margin: 0;"> <span id="LC173" class="line" lang="plaintext">  | ProofIrrelProv     ::   :: ProofIrrelProv    {{ com From proof irrelevance }}</span>

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<pre style="margin: 0;"> <span id="LC174" class="line" lang="plaintext">    {{ tex \mathsf{irrel} }}</span>

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<pre style="margin: 0;"> <span id="LC175" class="line" lang="plaintext"></span>

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<td class="diff-line-num old old_line" data-linenumber="176" 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="LC176" class="line" lang="plaintext">mg {{ tex m }} :: 'MCoercion_' ::= {{ com A possibly reflexive coercion , \coderef{<span class="idiff left right">types/TyCo</span>Rep.hs}{MCoercion} }}</span>

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<pre style="margin: 0;">+<span id="LC176" class="line" lang="plaintext">mg {{ tex m }} :: 'MCoercion_' ::= {{ com A possibly reflexive coercion , \coderef{<span class="idiff left right">GHC/Core/TyCo/</span>Rep.hs}{MCoercion} }}</span>

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<pre style="margin: 0;"> <span id="LC177" class="line" lang="plaintext">  | MRefl            ::   :: MRefl                {{ com \ctor{MRefl}: A trivial reflexive coercion }}</span>

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<pre style="margin: 0;"> <span id="LC178" class="line" lang="plaintext">  | MCo g            ::   :: MCo                  {{ com \ctor{MCo}: Other coercions }}</span>

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<pre style="margin: 0;"> <span id="LC179" class="line" lang="plaintext">    {{ tex [[g]] }}</span>

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<pre style="margin: 0;"> <span id="LC180" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC181" class="line" lang="plaintext">LorR :: 'LeftOrRight_' ::= {{ com left or right deconstructor, \coderef{<span class="idiff left right">types/TyCo</span>Rep.hs}{LeftOrRight} }}</span>

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<pre style="margin: 0;">+<span id="LC181" class="line" lang="plaintext">LorR :: 'LeftOrRight_' ::= {{ com left or right deconstructor, \coderef{<span class="idiff left right">GHC/Core/TyCo/</span>Rep.hs}{LeftOrRight} }}</span>

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<pre style="margin: 0;"> <span id="LC182" class="line" lang="plaintext">  | Left             ::   :: CLeft                {{ com \ctor{CLeft}: Left projection }}</span>

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<pre style="margin: 0;"> <span id="LC183" class="line" lang="plaintext">  | Right            ::   :: CRight               {{ com \ctor{CRight}: Right projection }}</span>

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<pre style="margin: 0;"> <span id="LC184" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC185" class="line" lang="plaintext">C :: 'CoAxiom_' ::= {{ com Axioms, \coderef{<span class="idiff left right">types</span>/TyCon.hs}{CoAxiom} }}</span>

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<pre style="margin: 0;">+<span id="LC185" class="line" lang="plaintext">C :: 'CoAxiom_' ::= {{ com Axioms, \coderef{<span class="idiff left right">GHC/Core</span>/TyCon.hs}{CoAxiom} }}</span>

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<pre style="margin: 0;"> <span id="LC186" class="line" lang="plaintext">  | T RA </ axBranchi // ; // i />     ::   :: CoAxiom  {{ com \ctor{CoAxiom}: Axiom }}</span>

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<pre style="margin: 0;"> <span id="LC187" class="line" lang="plaintext">  | ( C )                              :: M :: Parens   {{ com Parentheses }}</span>

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<pre style="margin: 0;"> <span id="LC188" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC189" class="line" lang="plaintext">R {{ tex \rho }} :: 'Role_' ::= {{ com Roles, \coderef{<span class="idiff left right">types/Co</span>Axiom.hs}{Role} }}</span>

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<pre style="margin: 0;">+<span id="LC189" class="line" lang="plaintext">R {{ tex \rho }} :: 'Role_' ::= {{ com Roles, \coderef{<span class="idiff left right">GHC/Core/Coercion/</span>Axiom.hs}{Role} }}</span>

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<pre style="margin: 0;"> <span id="LC190" class="line" lang="plaintext">  | Nom              ::   :: Nominal              {{ com Nominal }}</span>

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<pre style="margin: 0;"> <span id="LC191" class="line" lang="plaintext">    {{ tex \mathsf{N} }}</span>

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<pre style="margin: 0;"> <span id="LC192" class="line" lang="plaintext">  | Rep              ::   :: Representational     {{ com Representational }}</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">@@ -195,17 +195,17 @@ R {{ tex \rho }} :: 'Role_' ::= {{ com Roles, \coderef{types/CoAxiom.hs}{Role} }</td>

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<pre style="margin: 0;"> <span id="LC195" class="line" lang="plaintext">    {{ tex \mathsf{P} }}</span>

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<pre style="margin: 0;"> <span id="LC196" class="line" lang="plaintext">  | role_list [ i ]  :: M :: RoleListIndex        {{ com Look up in list }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC197" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC198" class="line" lang="plaintext">axBranch, b :: 'CoAxBranch_' ::= {{ com Axiom branches, \coderef{<span class="idiff left right">types</span>/TyCon.hs}{CoAxBranch} }}</span>

</pre>

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<pre style="margin: 0;">+<span id="LC198" class="line" lang="plaintext">axBranch, b :: 'CoAxBranch_' ::= {{ com Axiom branches, \coderef{<span class="idiff left right">GHC/Core</span>/TyCon.hs}{CoAxBranch} }}</span>

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<pre style="margin: 0;"> <span id="LC199" class="line" lang="plaintext">  | forall </ ni RAi // i /> . ( </ tj // j /> ~> s )  ::   :: CoAxBranch  {{ com \ctor{CoAxBranch}: Axiom branch }}</span>

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<pre style="margin: 0;"> <span id="LC200" class="line" lang="plaintext">  | ( </ axBranchi // i /> ) [ ind ]               :: M :: lookup      {{ com List lookup }}</span>

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<pre style="margin: 0;"> <span id="LC201" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC202" class="line" lang="plaintext">mu {{ tex \mu }} :: 'CoAxiomRule_' ::= {{ com CoAxiomRules, \coderef{<span class="idiff left right">types/Co</span>Axiom.hs}{CoAxiomRule} }}</span>

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<pre style="margin: 0;">+<span id="LC202" class="line" lang="plaintext">mu {{ tex \mu }} :: 'CoAxiomRule_' ::= {{ com CoAxiomRules, \coderef{<span class="idiff left right">GHC/Core/Coercion/</span>Axiom.hs}{CoAxiomRule} }}</span>

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<pre style="margin: 0;"> <span id="LC203" class="line" lang="plaintext">  | M ( I , role_list , R' )   ::  :: CoAxiomRule  {{ com Named rule, with parameter info }}</span>

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<pre style="margin: 0;"> <span id="LC204" class="line" lang="plaintext">    {{ tex {[[M]]}_{([[I]], [[ role_list ]], [[R']])} }}</span>

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<pre style="margin: 0;"> <span id="LC205" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC206" class="line" lang="plaintext">%% TYCONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%</span>

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<pre style="margin: 0;"> <span id="LC207" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC208" class="line" lang="plaintext">T :: 'TyCon_' ::= {{ com Type constructors, \coderef{<span class="idiff left right">types</span>/TyCon.hs}{TyCon} }}</span>

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<pre style="margin: 0;">+<span id="LC208" class="line" lang="plaintext">T :: 'TyCon_' ::= {{ com Type constructors, \coderef{<span class="idiff left right">GHC/Core</span>/TyCon.hs}{TyCon} }}</span>

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<pre style="margin: 0;"> <span id="LC209" class="line" lang="plaintext">  | ( -> )       ::   :: FunTyCon          {{ com \ctor{FunTyCon}: Arrow }}</span>

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<pre style="margin: 0;"> <span id="LC210" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC211" class="line" lang="plaintext">  % the following also includes TupleTyCon, SynTyCon</span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="226" 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="226" 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">@@ -226,22 +226,22 @@ H :: 'PrimTyCon_' ::= {{ com Primitive type constructors, \coderef{GHC.Builtin.T</td>

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<pre style="margin: 0;"> <span id="LC226" class="line" lang="plaintext">  | TYPE         ::   :: TYPE                   {{ com TYPE (\texttt{tYPETyCon}) }}</span>

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<pre style="margin: 0;"> <span id="LC227" class="line" lang="plaintext">  | Levity       ::   :: Levity                 {{ com Levity (\texttt{LevityTyCon}) }}</span>

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<pre style="margin: 0;"> <span id="LC228" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC229" class="line" lang="plaintext">K :: 'DataCon_' ::= {{ com Data constructors, \coderef{<span class="idiff left right">basicTypes</span>/DataCon.hs}{DataCon} }}</span>

</pre>

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<pre style="margin: 0;">+<span id="LC229" class="line" lang="plaintext">K :: 'DataCon_' ::= {{ com Data constructors, \coderef{<span class="idiff left right">GHC/Core</span>/DataCon.hs}{DataCon} }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC230" class="line" lang="plaintext">  | Lifted       ::   :: Lifted       {{ com \ctor{Lifted}, a lifted type }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC231" class="line" lang="plaintext">  | Unlifted     ::   :: Unlifted     {{ com \ctor{Unlifted}, an unlifted type }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC232" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC233" class="line" lang="plaintext">%% CONTEXTS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%</span>

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<pre style="margin: 0;"> <span id="LC234" class="line" lang="plaintext"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC235" class="line" lang="plaintext">G {{ tex \Gamma }} :: 'LintM_Bindings_' ::= {{ com List of bindings, \coderef{<span class="idiff left right">coreSyn/Core</span>Lint.hs}{LintM} }}</span>

</pre>

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<pre style="margin: 0;">+<span id="LC235" class="line" lang="plaintext">G {{ tex \Gamma }} :: 'LintM_Bindings_' ::= {{ com List of bindings, \coderef{<span class="idiff left right">GHC/Core/</span>Lint.hs}{LintM} }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC236" class="line" lang="plaintext">  | n                        ::   :: Binding   {{ com Single binding }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC237" class="line" lang="plaintext">  | </ Gi // , // i />       ::   :: Concat    {{ com Context concatenation }}</span>

</pre>

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<pre style="margin: 0;">-<span id="LC238" class="line" lang="plaintext">  | vars_of binding          :: M :: VarsOf    {{ com \coderef{<span class="idiff left right">coreSyn/CoreSyn</span>.hs}{bindersOf} }}</span>

</pre>

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<pre style="margin: 0;">+<span id="LC238" class="line" lang="plaintext">  | vars_of binding          :: M :: VarsOf    {{ com \coderef{<span class="idiff left right">GHC/Core</span>.hs}{bindersOf} }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC239" class="line" lang="plaintext"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC240" class="line" lang="plaintext">D {{ tex \Delta }} :: 'LintM_JoinBindings_' ::= {{ com List of join bindings, \coderef{<span class="idiff left right">coreSyn/Core</span>Lint.hs}{LintM} }}</span>

</pre>

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<pre style="margin: 0;">+<span id="LC240" class="line" lang="plaintext">D {{ tex \Delta }} :: 'LintM_JoinBindings_' ::= {{ com List of join bindings, \coderef{<span class="idiff left right">GHC/Core/</span>Lint.hs}{LintM} }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC241" class="line" lang="plaintext">  | l                        ::   :: Binding   {{ com Single binding }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC242" class="line" lang="plaintext">  | </ Di // , // i />       ::   :: Concat    {{ com Context concatenation }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC243" class="line" lang="plaintext">  | empty                    :: M :: Empty     {{ com Empty context }}</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="244" 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="LC244" class="line" lang="plaintext">  | labels_of binding        :: M :: LabelsOf  {{ com \coderef{<span class="idiff left right">coreSyn/CoreSyn</span>.hs}{bindersOf} }}</span>

</pre>

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<pre style="margin: 0;">+<span id="LC244" class="line" lang="plaintext">  | labels_of binding        :: M :: LabelsOf  {{ com \coderef{<span class="idiff left right">GHC/Core</span>.hs}{bindersOf} }}</span>

</pre>

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<pre style="margin: 0;"> <span id="LC245" class="line" lang="plaintext"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC246" class="line" lang="plaintext">O {{ tex \Omega }} :: 'VarEnv_Role_' ::= {{ com Mapping from type variables to roles }}</span>

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<pre style="margin: 0;"> <span id="LC247" class="line" lang="plaintext">  | </ ni : Ri // i />       ::   :: List      {{ com List of bindings }}</span>

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<br>

</li>

<li id="a088d80ab8c32a211cb927ba7d489370cd5eb4fe">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ede241268171e8eee1e750d88ff356ddbfc357f2#a088d80ab8c32a211cb927ba7d489370cd5eb4fe"><strong>docs/core-spec/README</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="30" 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">@@ -30,7 +30,7 @@ into LaTeX math-mode code. Thus, the file core-spec.mng is the source for</td>

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<pre style="margin: 0;"> <span id="LC30" class="line" lang="plaintext">core-spec.tex, which gets processed into core-spec.pdf.</span>

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<pre style="margin: 0;"> <span id="LC31" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC32" class="line" lang="plaintext">The file CoreSyn.ott contains the grammar of System FC, mostly extracted from</span>

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<pre style="margin: 0;">-<span id="LC33" class="line" lang="plaintext">compiler/<span class="idiff left right">coreSyn/CoreSyn</span>.hs. Here are a few pointers to help those of you</span>

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<pre style="margin: 0;">+<span id="LC33" class="line" lang="plaintext">compiler/<span class="idiff left right">GHC/Core</span>.hs. Here are a few pointers to help those of you</span>

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<pre style="margin: 0;"> <span id="LC34" class="line" lang="plaintext">unfamiliar with Ott:</span>

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<pre style="margin: 0;"> <span id="LC35" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC36" class="line" lang="plaintext">- The {{ ... }} snippets are called "homs", and they assist ott in translating</span>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="69" 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">@@ -69,7 +69,7 @@ your notation to LaTeX. Three different homs are used:</td>

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<pre style="margin: 0;"> <span id="LC69" class="line" lang="plaintext">  it if necessary to disambiguate other parses.</span>

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<pre style="margin: 0;"> <span id="LC70" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC71" class="line" lang="plaintext">The file CoreLint.ott contains inductively defined judgements for many of the</span>

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<pre style="margin: 0;">-<span id="LC72" class="line" lang="plaintext">functions in compiler/<span class="idiff left right">coreSyn/Core</span>Lint.hs. Each judgement is labeled with an</span>

</pre>

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<pre style="margin: 0;">+<span id="LC72" class="line" lang="plaintext">functions in compiler/<span class="idiff left right">GHC/Core/</span>Lint.hs. Each judgement is labeled with an</span>

</pre>

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<pre style="margin: 0;"> <span id="LC73" class="line" lang="plaintext">abbreviation to distinguish it from the others. These abbreviations appear in</span>

</pre>

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<pre style="margin: 0;"> <span id="LC74" class="line" lang="plaintext">the source code right after a turnstile |-. The declaration for each judgment</span>

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<pre style="margin: 0;"> <span id="LC75" class="line" lang="plaintext">contains a reference to the function it represents. Each rule is labeled with</span>

</pre>

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<br>

</li>

<li id="7dc5395d86b92c5a2b05aa2e9c13c1635f051da8">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ede241268171e8eee1e750d88ff356ddbfc357f2#7dc5395d86b92c5a2b05aa2e9c13c1635f051da8"><strong>docs/core-spec/core-spec.mng</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">@@ -31,7 +31,7 @@ System FC, as implemented in GHC\footnote{This</td>

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<pre style="margin: 0;"> <span id="LC31" class="line" lang="tex">document was originally prepared by Richard Eisenberg (<span class="k" style="font-weight: 600;">\texttt</span><span class="p">{</span>eir@cis.upenn.edu<span class="p">}</span>),</span>

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<pre style="margin: 0;"> <span id="LC32" class="line" lang="tex">but it should be maintained by anyone who edits the functions or data structures</span>

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<pre style="margin: 0;"> <span id="LC33" class="line" lang="tex">mentioned in this file. Please feel free to contact Richard for more information.<span class="p">}</span><span class="k" style="font-weight: 600;">\\</span></span>

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<pre style="margin: 0;">-<span id="LC34" class="line" lang="tex"><span class="k" style="font-weight: 600;">\Large</span> 26 <span class="idiff left right">January, 2018</span></span>

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<pre style="margin: 0;">+<span id="LC34" class="line" lang="tex"><span class="k" style="font-weight: 600;">\Large</span> 26 <span class="idiff left right">May, 2020</span></span>

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<pre style="margin: 0;"> <span id="LC35" class="line" lang="tex"><span class="nt" style="color: #000080;">\end{center}</span></span>

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<pre style="margin: 0;"> <span id="LC36" class="line" lang="tex"></span>

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<pre style="margin: 0;"> <span id="LC37" class="line" lang="tex"><span class="k" style="font-weight: 600;">\section</span><span class="p">{</span>Introduction<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">@@ -72,8 +72,8 @@ Literals do not play a major role, so we leave them abstract:</td>

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<pre style="margin: 0;"> <span id="LC72" class="line" lang="tex"></span>

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<pre style="margin: 0;"> <span id="LC73" class="line" lang="tex"><span class="k" style="font-weight: 600;">\gram</span><span class="p">{</span><span class="k" style="font-weight: 600;">\ottlit</span><span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC74" class="line" lang="tex"></span>

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<pre style="margin: 0;">-<span id="LC75" class="line" lang="tex">We also leave abstract the function <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">basic</span>Types/Literal.hs<span class="p">}{</span>literalType<span class="p">}</span></span>

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<pre style="margin: 0;">-<span id="LC76" class="line" lang="tex">and the judgment <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">coreSyn/Core</span>Lint.hs<span class="p">}{</span>lintTyLit<span class="p">}</span> (written <span class="p">$</span><span class="o" style="font-weight: 600;">[[</span><span class="nb" style="color: #0086b3;">G |</span><span class="o" style="font-weight: 600;">-</span><span class="nb" style="color: #0086b3;">tylit lit : k</span><span class="o" style="font-weight: 600;">]]</span><span class="p">$</span>).</span>

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<pre style="margin: 0;">+<span id="LC75" class="line" lang="tex">We also leave abstract the function <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">GHC/</span>Types/Literal.hs<span class="p">}{</span>literalType<span class="p">}</span></span>

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<pre style="margin: 0;">+<span id="LC76" class="line" lang="tex">and the judgment <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">GHC/Core/</span>Lint.hs<span class="p">}{</span>lintTyLit<span class="p">}</span> (written <span class="p">$</span><span class="o" style="font-weight: 600;">[[</span><span class="nb" style="color: #0086b3;">G |</span><span class="o" style="font-weight: 600;">-</span><span class="nb" style="color: #0086b3;">tylit lit : k</span><span class="o" style="font-weight: 600;">]]</span><span class="p">$</span>).</span>

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<pre style="margin: 0;"> <span id="LC77" class="line" lang="tex"></span>

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<pre style="margin: 0;"> <span id="LC78" class="line" lang="tex"><span class="k" style="font-weight: 600;">\subsection</span><span class="p">{</span>Variables<span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC79" class="line" lang="tex"><span class="k" style="font-weight: 600;">\enlargethispage</span><span class="p">{</span>10pt<span class="p">}</span> <span class="c" style="color: #998; font-style: italic;">% without this first line of "z" definition is placed on</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">@@ -351,13 +351,13 @@ fresh in the context. In the implementation, of course, some work is done</td>

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<pre style="margin: 0;"> <span id="LC351" class="line" lang="tex">to guarantee this freshness. In particular, adding a new type variable to</span>

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<pre style="margin: 0;"> <span id="LC352" class="line" lang="tex">the context sometimes requires creating a new, fresh variable name and then</span>

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<pre style="margin: 0;"> <span id="LC353" class="line" lang="tex">applying a substitution. We elide these details in this formalism, but</span>

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<pre style="margin: 0;">-<span id="LC354" class="line" lang="tex">see <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">types</span>/Type.hs<span class="p">}{</span>substTyVarBndr<span class="p">}</span> for details.</span>

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<pre style="margin: 0;">+<span id="LC354" class="line" lang="tex">see <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">GHC/Core</span>/Type.hs<span class="p">}{</span>substTyVarBndr<span class="p">}</span> for details.</span>

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<pre style="margin: 0;"> <span id="LC355" class="line" lang="tex"></span>

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<pre style="margin: 0;"> <span id="LC356" class="line" lang="tex"><span class="k" style="font-weight: 600;">\section</span><span class="p">{</span>Typing judgments<span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC357" class="line" lang="tex"></span>

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<pre style="margin: 0;"> <span id="LC358" class="line" lang="tex">The following functions are used from GHC. Their names are descriptive, and they</span>

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<pre style="margin: 0;">-<span id="LC359" class="line" lang="tex">are not formalized here: <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">types</span>/TyCon.hs<span class="p">}{</span>tyConKind<span class="p">}</span>,</span>

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<pre style="margin: 0;">-<span id="LC360" class="line" lang="tex"><span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left">types/TyCon.hs</span><span class="p"><span class="idiff">}{</span></span><span class="idiff">tyConArity</span><span class="p"><span class="idiff">}</span></span><span class="idiff">, </span><span class="k" style="font-weight: 600;"><span class="idiff">\coderef</span></span><span class="p"><span class="idiff">{</span></span><span class="idiff">basicTypes/DataCon.hs</span><span class="p"><span class="idiff">}{</span></span><span class="idiff">dataConTyCon</span><span class="p"><span class="idiff">}</span></span><span class="idiff">, </span><span class="k" style="font-weight: 600;"><span class="idiff">\coderef</span></span><span class="p"><span class="idiff">{</span></span><span class="idiff">types/TyCon.hs</span><span class="p"><span class="idiff">}{</span></span><span class="idiff">isNewTyCon</span><span class="p"><span class="idiff">}</span></span><span class="idiff">, </span><span class="k" style="font-weight: 600;"><span class="idiff">\coderef</span></span><span class="p"><span class="idiff">{</span></span><span class="idiff right">basicTypes</span>/DataCon.hs<span class="p">}{</span>dataConRepType<span class="p">}</span>.</span>

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<pre style="margin: 0;">+<span id="LC359" class="line" lang="tex">are not formalized here: <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">GHC/Core</span>/TyCon.hs<span class="p">}{</span>tyConKind<span class="p">}</span>,</span>

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<pre style="margin: 0;">+<span id="LC360" class="line" lang="tex"><span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left">GHC/Core/TyCon.hs</span><span class="p"><span class="idiff">}{</span></span><span class="idiff">tyConArity</span><span class="p"><span class="idiff">}</span></span><span class="idiff">, </span><span class="k" style="font-weight: 600;"><span class="idiff">\coderef</span></span><span class="p"><span class="idiff">{</span></span><span class="idiff">GHC/Core/DataCon.hs</span><span class="p"><span class="idiff">}{</span></span><span class="idiff">dataConTyCon</span><span class="p"><span class="idiff">}</span></span><span class="idiff">, </span><span class="k" style="font-weight: 600;"><span class="idiff">\coderef</span></span><span class="p"><span class="idiff">{</span></span><span class="idiff">GHC/Core/TyCon.hs</span><span class="p"><span class="idiff">}{</span></span><span class="idiff">isNewTyCon</span><span class="p"><span class="idiff">}</span></span><span class="idiff">, </span><span class="k" style="font-weight: 600;"><span class="idiff">\coderef</span></span><span class="p"><span class="idiff">{</span></span><span class="idiff right">GHC/Core</span>/DataCon.hs<span class="p">}{</span>dataConRepType<span class="p">}</span>.</span>

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<pre style="margin: 0;"> <span id="LC361" class="line" lang="tex"></span>

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<pre style="margin: 0;"> <span id="LC362" class="line" lang="tex"><span class="k" style="font-weight: 600;">\subsection</span><span class="p">{</span>Program consistency<span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC363" class="line" lang="tex"></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">@@ -367,7 +367,7 @@ and then check each binding.</td>

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<pre style="margin: 0;"> <span id="LC367" class="line" lang="tex"></span>

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<pre style="margin: 0;"> <span id="LC368" class="line" lang="tex"><span class="k" style="font-weight: 600;">\ottdefnlintCoreBindings</span><span class="p">{}</span></span>

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<pre style="margin: 0;"> <span id="LC369" class="line" lang="tex"></span>

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<pre style="margin: 0;">-<span id="LC370" class="line" lang="tex">Here is the definition of <span class="p">$</span><span class="o" style="font-weight: 600;">[[</span><span class="nb" style="color: #0086b3;">vars</span><span class="p">_</span><span class="nb" style="color: #0086b3;">of</span><span class="o" style="font-weight: 600;">]]</span><span class="p">$</span>, taken from <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">coreSyn/CoreSyn</span>.hs<span class="p">}{</span>bindersOf<span class="p">}</span>:</span>

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<pre style="margin: 0;">+<span id="LC370" class="line" lang="tex">Here is the definition of <span class="p">$</span><span class="o" style="font-weight: 600;">[[</span><span class="nb" style="color: #0086b3;">vars</span><span class="p">_</span><span class="nb" style="color: #0086b3;">of</span><span class="o" style="font-weight: 600;">]]</span><span class="p">$</span>, taken from <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">GHC/Core</span>.hs<span class="p">}{</span>bindersOf<span class="p">}</span>:</span>

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<pre style="margin: 0;"> <span id="LC371" class="line" lang="tex"></span>

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<pre style="margin: 0;"> <span id="LC372" class="line" lang="tex"><span class="p">\[</span></span>

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<pre style="margin: 0;"> <span id="LC373" class="line" lang="tex"><span class="nv" style="color: #008080;">\begin</span><span class="p">{</span><span class="nb" style="color: #0086b3;">array</span><span class="p">}{</span><span class="nb" style="color: #0086b3;">ll</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">@@ -413,11 +413,11 @@ to check each substituted type $[[s'i]]$ in a context containing all the types</td>

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<pre style="margin: 0;"> <span id="LC413" class="line" lang="tex">that come before it in the list of bindings. The <span class="p">$</span><span class="o" style="font-weight: 600;">[[</span><span class="nb" style="color: #0086b3;">G'i</span><span class="o" style="font-weight: 600;">]]</span><span class="p">$</span> are contexts</span>

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<pre style="margin: 0;"> <span id="LC414" class="line" lang="tex">containing the names and kinds of all type variables (and term variables,</span>

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<pre style="margin: 0;"> <span id="LC415" class="line" lang="tex">for that matter) up to the <span class="p">$</span><span class="nb" style="color: #0086b3;">i</span><span class="p">$</span>th binding. This logic is extracted from</span>

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<pre style="margin: 0;">-<span id="LC416" class="line" lang="tex"><span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">coreSyn/Core</span>Lint.hs<span class="p">}{</span>lintAndScopeIds<span class="p">}</span>.</span>

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<pre style="margin: 0;">+<span id="LC416" class="line" lang="tex"><span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">GHC/Core/</span>Lint.hs<span class="p">}{</span>lintAndScopeIds<span class="p">}</span>.</span>

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<pre style="margin: 0;"> <span id="LC417" class="line" lang="tex"></span>

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<pre style="margin: 0;"> <span id="LC418" class="line" lang="tex"><span class="k" style="font-weight: 600;">\item</span> The GHC source code checks all arguments in an application expression</span>

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<pre style="margin: 0;">-<span id="LC419" class="line" lang="tex">all at once using <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">coreSyn/CoreSyn</span>.hs<span class="p">}{</span>collectArgs<span class="p">}</span></span>

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<pre style="margin: 0;">-<span id="LC420" class="line" lang="tex">and <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">coreSyn/Core</span>Lint.hs<span class="p">}{</span>lintCoreArgs<span class="p">}</span>. The operation</span>

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<pre style="margin: 0;">+<span id="LC419" class="line" lang="tex">all at once using <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">GHC/Core</span>.hs<span class="p">}{</span>collectArgs<span class="p">}</span></span>

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<pre style="margin: 0;">+<span id="LC420" class="line" lang="tex">and <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">GHC/Core/</span>Lint.hs<span class="p">}{</span>lintCoreArgs<span class="p">}</span>. The operation</span>

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<pre style="margin: 0;"> <span id="LC421" class="line" lang="tex">has been unfolded for presentation here.</span>

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<pre style="margin: 0;"> <span id="LC422" class="line" lang="tex"></span>

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<pre style="margin: 0;"> <span id="LC423" class="line" lang="tex"><span class="k" style="font-weight: 600;">\item</span> If a <span class="p">$</span><span class="o" style="font-weight: 600;">[[</span><span class="nb" style="color: #0086b3;">tick</span><span class="o" style="font-weight: 600;">]]</span><span class="p">$</span> contains breakpoints, the GHC source performs additional</span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="481" 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="481" 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">@@ -481,7 +481,7 @@ We believe both technical approaches are equivalent in what coercions they accep</td>

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<pre style="margin: 0;"> <span id="LC481" class="line" lang="tex"><span class="k" style="font-weight: 600;">\label</span><span class="p">{</span>sec:name<span class="p">_</span>consistency<span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC482" class="line" lang="tex"></span>

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<pre style="margin: 0;"> <span id="LC483" class="line" lang="tex">There are three very similar checks for names, two performed as part of</span>

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<pre style="margin: 0;">-<span id="LC484" class="line" lang="tex"><span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">coreSyn/Core</span>Lint.hs<span class="p">}{</span>lintSingleBinding<span class="p">}</span>:</span>

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<pre style="margin: 0;">+<span id="LC484" class="line" lang="tex"><span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">GHC/Core/</span>Lint.hs<span class="p">}{</span>lintSingleBinding<span class="p">}</span>:</span>

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<pre style="margin: 0;"> <span id="LC485" class="line" lang="tex"></span>

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<pre style="margin: 0;"> <span id="LC486" class="line" lang="tex"><span class="k" style="font-weight: 600;">\ottdefnlintSingleBindingXXlintBinder</span><span class="p">{}</span></span>

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<pre style="margin: 0;"> <span id="LC487" class="line" lang="tex"></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="565" 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="565" 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">@@ -565,12 +565,12 @@ The judgment $[[apart]]$ checks to see whether two lists of types are surely</td>

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<pre style="margin: 0;"> <span id="LC565" class="line" lang="tex">apart. <span class="p">$</span><span class="o" style="font-weight: 600;">[[</span><span class="nb" style="color: #0086b3;">apart</span><span class="o" style="font-weight: 600;">(</span><span class="nb" style="color: #0086b3;"> <</span><span class="o" style="font-weight: 600;">/</span><span class="nb" style="color: #0086b3;"> ti </span><span class="o" style="font-weight: 600;">//</span><span class="nb" style="color: #0086b3;"> i </span><span class="o" style="font-weight: 600;">/</span><span class="nb" style="color: #0086b3;">>, <</span><span class="o" style="font-weight: 600;">/</span><span class="nb" style="color: #0086b3;"> si </span><span class="o" style="font-weight: 600;">//</span><span class="nb" style="color: #0086b3;"> i </span><span class="o" style="font-weight: 600;">/</span><span class="nb" style="color: #0086b3;">> </span><span class="o" style="font-weight: 600;">)]]</span><span class="p">$</span>, where <span class="p">$</span><span class="o" style="font-weight: 600;">[[</span><span class="nb" style="color: #0086b3;"> <</span><span class="o" style="font-weight: 600;">/</span><span class="nb" style="color: #0086b3;"> ti </span><span class="o" style="font-weight: 600;">//</span><span class="nb" style="color: #0086b3;"> i </span><span class="o" style="font-weight: 600;">/</span><span class="nb" style="color: #0086b3;">></span></span>

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<pre style="margin: 0;"> <span id="LC566" class="line" lang="tex"><span class="o" style="font-weight: 600;">]]</span><span class="p">$</span> is a list of types and <span class="p">$</span><span class="o" style="font-weight: 600;">[[</span><span class="nb" style="color: #0086b3;"> <</span><span class="o" style="font-weight: 600;">/</span><span class="nb" style="color: #0086b3;"> si </span><span class="o" style="font-weight: 600;">//</span><span class="nb" style="color: #0086b3;"> i </span><span class="o" style="font-weight: 600;">/</span><span class="nb" style="color: #0086b3;">> </span><span class="o" style="font-weight: 600;">]]</span><span class="p">$</span> is a list of type</span>

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<pre style="margin: 0;"> <span id="LC567" class="line" lang="tex"><span class="k" style="font-weight: 600;">\emph</span><span class="p">{</span>patterns<span class="p">}</span> (as in a type family equation), first flattens the <span class="p">$</span><span class="o" style="font-weight: 600;">[[</span><span class="nb" style="color: #0086b3;"> <</span><span class="o" style="font-weight: 600;">/</span><span class="nb" style="color: #0086b3;"> ti</span></span>

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<pre style="margin: 0;">-<span id="LC568" class="line" lang="tex"><span class="nb" style="color: #0086b3;">    </span><span class="o" style="font-weight: 600;">//</span><span class="nb" style="color: #0086b3;"> i </span><span class="o" style="font-weight: 600;">/</span><span class="nb" style="color: #0086b3;">> </span><span class="o" style="font-weight: 600;">]]</span><span class="p">$</span> using <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">types</span>/FamInstEnv.hs<span class="p">}{</span>flattenTys<span class="p">}</span> and then checks to</span>

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<pre style="margin: 0;">-<span id="LC569" class="line" lang="tex">see if <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">types</span>/Unify.hs<span class="p">}{</span>tcUnifyTysFG<span class="p">}</span> returns <span class="k" style="font-weight: 600;">\texttt</span><span class="p">{</span>SurelyApart<span class="p">}</span>.</span>

</pre>

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<pre style="margin: 0;">+<span id="LC568" class="line" lang="tex"><span class="nb" style="color: #0086b3;">    </span><span class="o" style="font-weight: 600;">//</span><span class="nb" style="color: #0086b3;"> i </span><span class="o" style="font-weight: 600;">/</span><span class="nb" style="color: #0086b3;">> </span><span class="o" style="font-weight: 600;">]]</span><span class="p">$</span> using <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">GHC/Core</span>/FamInstEnv.hs<span class="p">}{</span>flattenTys<span class="p">}</span> and then checks to</span>

</pre>

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<pre style="margin: 0;">+<span id="LC569" class="line" lang="tex">see if <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">GHC/Core</span>/Unify.hs<span class="p">}{</span>tcUnifyTysFG<span class="p">}</span> returns <span class="k" style="font-weight: 600;">\texttt</span><span class="p">{</span>SurelyApart<span class="p">}</span>.</span>

</pre>

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570

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<pre style="margin: 0;"> <span id="LC570" class="line" lang="tex">Flattening takes all type family applications and replaces them with fresh variables,</span>

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571

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<pre style="margin: 0;"> <span id="LC571" class="line" lang="tex">taking care to map identical type family applications to the same fresh variable.</span>

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<pre style="margin: 0;"> <span id="LC572" class="line" lang="tex"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC573" class="line" lang="tex">The algorithm <span class="p">$</span><span class="o" style="font-weight: 600;">[[</span><span class="nb" style="color: #0086b3;">unify</span><span class="o" style="font-weight: 600;">]]</span><span class="p">$</span> is implemented in <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">types</span>/Unify.hs<span class="p">}{</span>tcUnifyTys<span class="p">}</span>.</span>

</pre>

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<pre style="margin: 0;">+<span id="LC573" class="line" lang="tex">The algorithm <span class="p">$</span><span class="o" style="font-weight: 600;">[[</span><span class="nb" style="color: #0086b3;">unify</span><span class="o" style="font-weight: 600;">]]</span><span class="p">$</span> is implemented in <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">GHC/Core</span>/Unify.hs<span class="p">}{</span>tcUnifyTys<span class="p">}</span>.</span>

</pre>

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<pre style="margin: 0;"> <span id="LC574" class="line" lang="tex">It performs a standard unification, returning a substitution upon success.</span>

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<pre style="margin: 0;"> <span id="LC575" class="line" lang="tex"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC576" class="line" lang="tex"><span class="k" style="font-weight: 600;">\section</span><span class="p">{</span>Operational semantics<span class="p">}</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="579" 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="579" 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">@@ -579,7 +579,7 @@ It performs a standard unification, returning a substitution upon success.</td>

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<pre style="margin: 0;"> <span id="LC579" class="line" lang="tex">GHC does not implement an operational semantics in any concrete form. Most</span>

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580

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<pre style="margin: 0;"> <span id="LC580" class="line" lang="tex">of the rules below are implied by algorithms in, for example, the simplifier</span>

</pre>

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581

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581

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<pre style="margin: 0;"> <span id="LC581" class="line" lang="tex">and optimizer. Yet, there is no one place in GHC that states these rules,</span>

</pre>

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582

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<td class="diff-line-num new_line old" data-linenumber="582" 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="LC582" class="line" lang="tex">analogously to <span class="k" style="font-weight: 600;">\texttt</span><span class="p">{</span><span class="idiff left right">Core</span>Lint.hs<span class="p">}</span>.</span>

</pre>

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582

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<pre style="margin: 0;">+<span id="LC582" class="line" lang="tex">analogously to <span class="k" style="font-weight: 600;">\texttt</span><span class="p">{</span><span class="idiff left right">GHC/Core/</span>Lint.hs<span class="p">}</span>.</span>

</pre>

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583

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583

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<pre style="margin: 0;"> <span id="LC583" class="line" lang="tex">Nevertheless, these rules are included in this document to help the reader</span>

</pre>

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584

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<td class="diff-line-num new_line" data-linenumber="584" 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">

584

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<pre style="margin: 0;"> <span id="LC584" class="line" lang="tex">understand System FC.</span>

</pre>

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<pre style="margin: 0;"> <span id="LC585" class="line" lang="tex"></span>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="607" 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">@@ -607,17 +607,17 @@ to the constructor. The terms are the regular term arguments stored in an</td>

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<pre style="margin: 0;"> <span id="LC607" class="line" lang="tex">algebraic datatype. Coercions (say, in a GADT) are considered term arguments.</span>

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<pre style="margin: 0;"> <span id="LC608" class="line" lang="tex"><span class="k" style="font-weight: 600;">\item</span> The rule <span class="k" style="font-weight: 600;">\ottdrulename</span><span class="p">{</span>S<span class="k" style="font-weight: 600;">\_</span>CasePush<span class="p">}</span> is the most complex rule.</span>

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<pre style="margin: 0;"> <span id="LC609" class="line" lang="tex"><span class="nt" style="color: #000080;">\begin{itemize}</span></span>

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<pre style="margin: 0;">-<span id="LC610" class="line" lang="tex"><span class="k" style="font-weight: 600;">\item</span> The logic in this rule is implemented in <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">coreSyn/Core</span>Subst.hs<span class="p">}{</span>exprIsConApp<span class="k" style="font-weight: 600;">\_</span>maybe<span class="p">}</span>.</span>

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<pre style="margin: 0;">-<span id="LC611" class="line" lang="tex"><span class="k" style="font-weight: 600;">\item</span> The <span class="p">$</span><span class="o" style="font-weight: 600;">[[</span><span class="nb" style="color: #0086b3;">coercionKind</span><span class="o" style="font-weight: 600;">]]</span><span class="p">$</span> function (<span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">types</span>/Coercion.hs<span class="p">}{</span>coercionKind<span class="p">}</span>)</span>

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<pre style="margin: 0;">+<span id="LC610" class="line" lang="tex"><span class="k" style="font-weight: 600;">\item</span> The logic in this rule is implemented in <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">GHC/Core/</span>Subst.hs<span class="p">}{</span>exprIsConApp<span class="k" style="font-weight: 600;">\_</span>maybe<span class="p">}</span>.</span>

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<td class="diff-line-num new old_line" data-linenumber="612" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC611" class="line" lang="tex"><span class="k" style="font-weight: 600;">\item</span> The <span class="p">$</span><span class="o" style="font-weight: 600;">[[</span><span class="nb" style="color: #0086b3;">coercionKind</span><span class="o" style="font-weight: 600;">]]</span><span class="p">$</span> function (<span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">GHC/Core</span>/Coercion.hs<span class="p">}{</span>coercionKind<span class="p">}</span>)</span>

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<pre style="margin: 0;"> <span id="LC612" class="line" lang="tex">extracts the two types (and their kinds) from</span>

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<pre style="margin: 0;"> <span id="LC613" class="line" lang="tex">a coercion. It does not require a typing context, as it does not <span class="k" style="font-weight: 600;">\emph</span><span class="p">{</span>check<span class="p">}</span> the</span>

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<pre style="margin: 0;"> <span id="LC614" class="line" lang="tex">coercion, just extracts its types.</span>

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<pre style="margin: 0;">-<span id="LC615" class="line" lang="tex"><span class="k" style="font-weight: 600;">\item</span> The <span class="p">$</span><span class="o" style="font-weight: 600;">[[</span><span class="nb" style="color: #0086b3;">dataConRepType</span><span class="o" style="font-weight: 600;">]]</span><span class="p">$</span> function (<span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">basicTypes</span>/DataCon.hs<span class="p">}{</span>dataConRepType<span class="p">}</span>) extracts the full type of a data constructor. Following the notation for</span>

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<pre style="margin: 0;">+<span id="LC615" class="line" lang="tex"><span class="k" style="font-weight: 600;">\item</span> The <span class="p">$</span><span class="o" style="font-weight: 600;">[[</span><span class="nb" style="color: #0086b3;">dataConRepType</span><span class="o" style="font-weight: 600;">]]</span><span class="p">$</span> function (<span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">GHC/Core</span>/DataCon.hs<span class="p">}{</span>dataConRepType<span class="p">}</span>) extracts the full type of a data constructor. Following the notation for</span>

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<pre style="margin: 0;"> <span id="LC616" class="line" lang="tex">constructor expressions, the parameters to the constructor are broken into three</span>

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<pre style="margin: 0;"> <span id="LC617" class="line" lang="tex">groups: universally quantified types, existentially quantified types, and terms.</span>

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<pre style="margin: 0;"> <span id="LC618" class="line" lang="tex"><span class="k" style="font-weight: 600;">\item</span> The substitutions in the last premise to the rule are unusual: they replace</span>

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<pre style="margin: 0;"> <span id="LC619" class="line" lang="tex"><span class="k" style="font-weight: 600;">\emph</span><span class="p">{</span>type<span class="p">}</span> variables with <span class="k" style="font-weight: 600;">\emph</span><span class="p">{</span>coercions<span class="p">}</span>. This substitution is called lifting</span>

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<pre style="margin: 0;">-<span id="LC620" class="line" lang="tex">and is implemented in <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">types</span>/Coercion.hs<span class="p">}{</span>liftCoSubst<span class="p">}</span>. The notation is</span>

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620

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<pre style="margin: 0;">+<span id="LC620" class="line" lang="tex">and is implemented in <span class="k" style="font-weight: 600;">\coderef</span><span class="p">{</span><span class="idiff left right">GHC/Core</span>/Coercion.hs<span class="p">}{</span>liftCoSubst<span class="p">}</span>. The notation is</span>

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621

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621

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<pre style="margin: 0;"> <span id="LC621" class="line" lang="tex">essentially a pun on the fact that types and coercions have such similar structure.</span>

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622

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<pre style="margin: 0;"> <span id="LC622" class="line" lang="tex">This operation is quite non-trivial. Please see <span class="k" style="font-weight: 600;">\emph</span><span class="p">{</span>System FC with Explicit</span>

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623

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<pre style="margin: 0;"> <span id="LC623" class="line" lang="tex">Kind Equality<span class="p">}</span> for details.</span>

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