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<title>src/full/Agda/Syntax/Abstract/Copatterns.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE CPP, TupleSections, PatternGuards, DeriveFunctor, StandaloneDeriving, ScopedTypeVariables, TypeSynonymInstances, FlexibleContexts, FlexibleInstances #-}</span>
<a name="line-2"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Abstract</span><span class='hs-varop'>.</span><span class='hs-conid'>Copatterns</span> <span class='hs-layout'>(</span><span class='hs-varid'>translateCopatternClauses</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-3"></a>
<a name="line-4"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Prelude</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-varid'>mapM</span><span class='hs-layout'>)</span>
<a name="line-5"></a>
<a name="line-6"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Applicative</span>
<a name="line-7"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-varid'>mapM</span><span class='hs-layout'>)</span>
<a name="line-8"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>Writer</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-varid'>mapM</span><span class='hs-layout'>)</span>
<a name="line-9"></a>
<a name="line-10"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Function</span>
<a name="line-11"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span>
<a name="line-12"></a>
<a name="line-13"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Traversable</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>T</span>
<a name="line-14"></a>
<a name="line-15"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Abstract</span>
<a name="line-16"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Abstract</span><span class='hs-varop'>.</span><span class='hs-conid'>Name</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>A</span>
<a name="line-17"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Common</span>
<a name="line-18"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Concrete</span><span class='hs-varop'>.</span><span class='hs-conid'>Name</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>C</span>
<a name="line-19"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Info</span>
<a name="line-20"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Position</span>
<a name="line-21"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Scope</span><span class='hs-varop'>.</span><span class='hs-conid'>Base</span>
<a name="line-22"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Scope</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span>
<a name="line-23"></a>
<a name="line-24"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>Base</span> <span class='hs-layout'>(</span><span class='hs-conid'>TypeError</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>Call</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>typeError</span><span class='hs-layout'>,</span>
<a name="line-25"></a> <span class='hs-conid'>TCErr</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-26"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span>
<a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span><span class='hs-varop'>.</span><span class='hs-conid'>Tuple</span>
<a name="line-28"></a>
<a name="line-29"></a><span class='hs-cpp'>#include "../../undefined.h"</span>
<a name="line-30"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span><span class='hs-varop'>.</span><span class='hs-conid'>Impossible</span>
<a name="line-31"></a>
<a name="line-32"></a><span class='hs-comment'>{- Andreas 2012-04-07, 2012-05-08
<a name="line-33"></a>
<a name="line-34"></a> Translating copatterns into record expressions
<a name="line-35"></a>
<a name="line-36"></a>This is a preliminary solution until we have proper copattern type
<a name="line-37"></a>checking and evaluation.
<a name="line-38"></a>
<a name="line-39"></a>Example 1:
<a name="line-40"></a>
<a name="line-41"></a> record Stream (A : Set) : Set where
<a name="line-42"></a> field
<a name="line-43"></a> head : A
<a name="line-44"></a> tail : Stream A
<a name="line-45"></a> open Stream
<a name="line-46"></a>
<a name="line-47"></a> alternate : Stream Nat
<a name="line-48"></a> ( head alternate ) = zero
<a name="line-49"></a> (head (tail alternate)) = suc zero
<a name="line-50"></a> (tail (tail alternate)) = alternate
<a name="line-51"></a>
<a name="line-52"></a>with pathes
<a name="line-53"></a>
<a name="line-54"></a> Path [head] zero
<a name="line-55"></a> Path [tail,head] (suc zero)
<a name="line-56"></a> Path [tail,tail] alternate
<a name="line-57"></a>
<a name="line-58"></a>is translated into
<a name="line-59"></a>
<a name="line-60"></a> alternate = record
<a name="line-61"></a> { head = zero
<a name="line-62"></a> ; tail = record
<a name="line-63"></a> { head = suc zero
<a name="line-64"></a> ; tail = alternate
<a name="line-65"></a> }
<a name="line-66"></a> }
<a name="line-67"></a>
<a name="line-68"></a>Example 2:
<a name="line-69"></a>
<a name="line-70"></a> record State (S A : Set) : Set where
<a name="line-71"></a> constructor state
<a name="line-72"></a> field
<a name="line-73"></a> runState : S → A × S
<a name="line-74"></a> open State
<a name="line-75"></a>
<a name="line-76"></a> record Monad (M : Set → Set) : Set1 where
<a name="line-77"></a> constructor monad
<a name="line-78"></a> field
<a name="line-79"></a> return : {A : Set} → A → M A
<a name="line-80"></a> _>>=_ : {A B : Set} → M A → (A → M B) → M B
<a name="line-81"></a> open Monad
<a name="line-82"></a>
<a name="line-83"></a> stateMonad : {S : Set} → Monad (State S)
<a name="line-84"></a> runState (return stateMonad a ) s = a , s
<a name="line-85"></a> runState (_>>=_ stateMonad m k) s₀ =
<a name="line-86"></a> let as₁ = runState m s₀
<a name="line-87"></a> in runState (k (proj₁ as₁)) (proj₂ as₁)
<a name="line-88"></a>
<a name="line-89"></a>with pathes
<a name="line-90"></a>
<a name="line-91"></a> Path [(return,[a] ), (runstate,[s ])] (a,s)
<a name="line-92"></a> Path [(_>>=_, [m,k]), (runstate,[s₀])] (let...)
<a name="line-93"></a>
<a name="line-94"></a>is translated to
<a name="line-95"></a>
<a name="line-96"></a> stateMonad = record
<a name="line-97"></a> { return = λ a → record { runState = λ s → a , s }
<a name="line-98"></a> ; _>>=_ = λ m k → record { runState = λ s₀ →
<a name="line-99"></a> let as₁ = runState m s₀
<a name="line-100"></a> in runState (k (proj₁ as₁)) (proj₂ as₁)
<a name="line-101"></a> }
<a name="line-102"></a>
<a name="line-103"></a>Example 3:
<a name="line-104"></a>
<a name="line-105"></a> swap3 : {A B C X : Set} → (X → A) × ((X → B) × C) → (X → C) × (X → (B × A))
<a name="line-106"></a> fst (swap3 t) x = snd (snd t)
<a name="line-107"></a> fst (snd (swap3 t) y) = fst (snd t) y
<a name="line-108"></a> snd (snd (swap3 t) z) = fst t z
<a name="line-109"></a>
<a name="line-110"></a>with pathes
<a name="line-111"></a>
<a name="line-112"></a> Path [(fst,[x])] (snd (snd t))
<a name="line-113"></a> Path [(snd,[y]), (fst,[])] (fst (snd t) y)
<a name="line-114"></a> Path [(snd,[z]), (snd,[])] (fst t z)
<a name="line-115"></a>
<a name="line-116"></a>ist translated to
<a name="line-117"></a>
<a name="line-118"></a> swap3 t = record
<a name="line-119"></a> { fst = λ x → snd (snd t)
<a name="line-120"></a> ; snd = λ y → record
<a name="line-121"></a> { fst = fst (snd t) y
<a name="line-122"></a> ; snd = (fst t z){z := y}
<a name="line-123"></a> }
<a name="line-124"></a> }
<a name="line-125"></a>
<a name="line-126"></a>How to translate:
<a name="line-127"></a>- group clauses into those with same LHSCore and same withpatterns
<a name="line-128"></a>
<a name="line-129"></a>-}</span>
<a name="line-130"></a>
<a name="line-131"></a><a name="translateCopatternClauses"></a><span class='hs-definition'>translateCopatternClauses</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Clause</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ScopeM</span> <span class='hs-layout'>(</span><span class='hs-conid'>Delayed</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Clause</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-132"></a><span class='hs-definition'>translateCopatternClauses</span> <span class='hs-varid'>cs</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>all</span> <span class='hs-varid'>noCopats</span> <span class='hs-varid'>cs</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>NotDelayed</span><span class='hs-layout'>,</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span> <span class='hs-keyword'>else</span> <span class='hs-layout'>(</span><span class='hs-conid'>Delayed</span><span class='hs-layout'>,</span><span class='hs-layout'>)</span> <span class='hs-varop'><$></span> <span class='hs-keyword'>do</span>
<a name="line-133"></a> <span class='hs-varid'>pcs</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>ProjPath</span> <span class='hs-conid'>Clause</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mapM</span> <span class='hs-varid'>clauseToPath</span> <span class='hs-varid'>cs</span>
<a name="line-134"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>cps</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>Clause</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>ProjPath</span> <span class='hs-conid'>Expr</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-135"></a> <span class='hs-varid'>cps</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>groupClauses</span> <span class='hs-varid'>pcs</span>
<a name="line-136"></a><span class='hs-comment'>{-
<a name="line-137"></a> cps = map ((theContent . head) /\ map (fmap (rhsExpr . clauseRHS))) $
<a name="line-138"></a> groupBy ((==) `on` clauseLHS . theContent) pcs
<a name="line-139"></a>-}</span>
<a name="line-140"></a> <span class='hs-varid'>ces</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mapM</span> <span class='hs-layout'>(</span><span class='hs-varid'>mapSndM</span> <span class='hs-varid'>pathToRecord</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-141"></a> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>mapSnd</span> <span class='hs-varop'>$</span> <span class='hs-varid'>sortBy</span> <span class='hs-layout'>(</span><span class='hs-varid'>compare</span> <span class='hs-varop'>`on`</span> <span class='hs-varid'>thePath</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>cps</span>
<a name="line-142"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>c</span> <span class='hs-layout'>{</span> <span class='hs-varid'>clauseRHS</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>RHS</span> <span class='hs-varid'>e</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-varid'>ces</span>
<a name="line-143"></a> <span class='hs-keyword'>where</span>
<a name="line-144"></a> <span class='hs-varid'>noCopats</span> <span class='hs-conid'>Clause</span><span class='hs-layout'>{</span> <span class='hs-varid'>clauseLHS</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LHS</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>LHSHead</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>}</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-145"></a> <span class='hs-varid'>noCopats</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-146"></a> <span class='hs-varid'>rhsExpr</span> <span class='hs-layout'>(</span><span class='hs-conid'>RHS</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>e</span>
<a name="line-147"></a> <span class='hs-varid'>rhsExpr</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>__IMPOSSIBLE__</span>
<a name="line-148"></a>
<a name="line-149"></a><a name="Path"></a><span class='hs-comment'>-- | A sequence of decisions @b@ leading to a head @a@.</span>
<a name="line-150"></a><a name="Path"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Path</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Path</span>
<a name="line-151"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>thePath</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- ^ the list of choices</span>
<a name="line-152"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>theContent</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>b</span>
<a name="line-153"></a> <span class='hs-layout'>}</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Functor</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- NB: this means @Path a@ is a functor for any @a@</span>
<a name="line-154"></a>
<a name="line-155"></a><a name="mapContent"></a><span class='hs-definition'>mapContent</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Path</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Path</span> <span class='hs-varid'>a</span> <span class='hs-varid'>c</span>
<a name="line-156"></a><span class='hs-definition'>mapContent</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Path</span> <span class='hs-varid'>p</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Path</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-157"></a>
<a name="line-158"></a><a name="ProjEntry"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>ProjEntry</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ProjEntry</span>
<a name="line-159"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>projPE</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>QName</span>
<a name="line-160"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>patsPE</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>NamedArg</span> <span class='hs-conid'>Name</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- ^ currently we only support variable patterns</span>
<a name="line-161"></a> <span class='hs-layout'>}</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Ord</span><span class='hs-layout'>)</span>
<a name="line-162"></a>
<a name="line-163"></a><a name="ProjPath"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>ProjPath</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Path</span> <span class='hs-conid'>ProjEntry</span>
<a name="line-164"></a>
<a name="line-165"></a><a name="instance%20HasRange%20ProjEntry"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>HasRange</span> <span class='hs-conid'>ProjEntry</span> <span class='hs-keyword'>where</span>
<a name="line-166"></a> <span class='hs-varid'>getRange</span> <span class='hs-layout'>(</span><span class='hs-conid'>ProjEntry</span> <span class='hs-varid'>p</span> <span class='hs-varid'>ps</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>getRange</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span><span class='hs-layout'>,</span><span class='hs-varid'>ps</span><span class='hs-layout'>)</span>
<a name="line-167"></a>
<a name="line-168"></a><a name="groupClauses"></a><span class='hs-comment'>-- | This is a n^2 grouping algorithm which uses only alpha-equality</span>
<a name="line-169"></a><span class='hs-definition'>groupClauses</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>ProjPath</span> <span class='hs-conid'>Clause</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>Clause</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>ProjPath</span> <span class='hs-conid'>Expr</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-170"></a><span class='hs-definition'>groupClauses</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-171"></a><span class='hs-definition'>groupClauses</span> <span class='hs-layout'>(</span><span class='hs-varid'>pc</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Path</span> <span class='hs-varid'>p</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>pcs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-conid'>Path</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>rhs</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>grp</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>groupClauses</span> <span class='hs-varid'>rest</span>
<a name="line-172"></a> <span class='hs-keyword'>where</span>
<a name="line-173"></a> <span class='hs-layout'>(</span><span class='hs-varid'>grp</span><span class='hs-layout'>,</span> <span class='hs-varid'>rest</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>collect</span> <span class='hs-varid'>pcs</span>
<a name="line-174"></a> <span class='hs-comment'>-- Collect l splits l into pc's group and the remainder</span>
<a name="line-175"></a> <span class='hs-comment'>-- If the lhs of the next clause is alpha-equivalent to the current lhs</span>
<a name="line-176"></a> <span class='hs-comment'>-- then add the next clause to this group, performing the alpha-conversion</span>
<a name="line-177"></a> <span class='hs-varid'>collect</span> <span class='hs-layout'>(</span><span class='hs-conid'>Path</span> <span class='hs-varid'>p'</span> <span class='hs-varid'>c'</span> <span class='hs-conop'>:</span> <span class='hs-varid'>pcs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>rho</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>alpha</span> <span class='hs-layout'>(</span><span class='hs-varid'>clauseLHS</span> <span class='hs-varid'>c'</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>clauseLHS</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-178"></a> <span class='hs-varid'>mapFst</span> <span class='hs-layout'>(</span><span class='hs-conid'>Path</span> <span class='hs-varid'>p'</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename'</span> <span class='hs-varid'>rho</span> <span class='hs-layout'>(</span><span class='hs-varid'>rhs</span> <span class='hs-varid'>c'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>collect</span> <span class='hs-varid'>pcs</span>
<a name="line-179"></a> <span class='hs-comment'>-- we go through all the clauses, since they could be in random order...</span>
<a name="line-180"></a> <span class='hs-varid'>collect</span> <span class='hs-layout'>(</span><span class='hs-varid'>pc</span> <span class='hs-conop'>:</span> <span class='hs-varid'>pcs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapSnd</span> <span class='hs-layout'>(</span><span class='hs-varid'>pc</span> <span class='hs-conop'>:</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>collect</span> <span class='hs-varid'>pcs</span>
<a name="line-181"></a> <span class='hs-varid'>collect</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>[]</span><span class='hs-layout'>,</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span>
<a name="line-182"></a>
<a name="line-183"></a> <span class='hs-varid'>rhs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>rhsExpr</span> <span class='hs-varop'>.</span> <span class='hs-varid'>clauseRHS</span>
<a name="line-184"></a> <span class='hs-varid'>rhsExpr</span> <span class='hs-layout'>(</span><span class='hs-conid'>RHS</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>e</span>
<a name="line-185"></a> <span class='hs-varid'>rhsExpr</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>__IMPOSSIBLE__</span>
<a name="line-186"></a>
<a name="line-187"></a><a name="clauseToPath"></a><span class='hs-definition'>clauseToPath</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Clause</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ScopeM</span> <span class='hs-layout'>(</span><span class='hs-conid'>ProjPath</span> <span class='hs-conid'>Clause</span><span class='hs-layout'>)</span>
<a name="line-188"></a><span class='hs-definition'>clauseToPath</span> <span class='hs-layout'>(</span><span class='hs-conid'>Clause</span> <span class='hs-layout'>(</span><span class='hs-conid'>LHS</span> <span class='hs-varid'>i</span> <span class='hs-varid'>lhs</span> <span class='hs-varid'>wps</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>RHS</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-189"></a> <span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span> <span class='hs-varid'>lhs</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Clause</span> <span class='hs-layout'>(</span><span class='hs-conid'>LHS</span> <span class='hs-varid'>i</span> <span class='hs-varid'>lhs</span> <span class='hs-varid'>wps</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>RHS</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-varop'><$></span> <span class='hs-varid'>lhsToPath</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>lhs</span>
<a name="line-190"></a><span class='hs-definition'>clauseToPath</span> <span class='hs-layout'>(</span><span class='hs-conid'>Clause</span> <span class='hs-varid'>lhs</span> <span class='hs-layout'>(</span><span class='hs-conid'>RHS</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>NotImplemented</span> <span class='hs-varop'>$</span> <span class='hs-str'>"copattern clauses with where declarations"</span>
<a name="line-191"></a><span class='hs-definition'>clauseToPath</span> <span class='hs-layout'>(</span><span class='hs-conid'>Clause</span> <span class='hs-varid'>lhs</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>wheredecls</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>NotImplemented</span> <span class='hs-varop'>$</span> <span class='hs-str'>"copattern clauses with absurd, with or rewrite right hand side"</span>
<a name="line-192"></a>
<a name="line-193"></a><a name="lhsToPath"></a><span class='hs-definition'>lhsToPath</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>ProjEntry</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>LHSCore</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ScopeM</span> <span class='hs-layout'>(</span><span class='hs-conid'>ProjPath</span> <span class='hs-conid'>LHSCore</span><span class='hs-layout'>)</span>
<a name="line-194"></a><span class='hs-definition'>lhsToPath</span> <span class='hs-varid'>acc</span> <span class='hs-varid'>lhs</span><span class='hs-keyglyph'>@</span><span class='hs-conid'>LHSHead</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Path</span> <span class='hs-varid'>acc</span> <span class='hs-varid'>lhs</span>
<a name="line-195"></a><span class='hs-definition'>lhsToPath</span> <span class='hs-varid'>acc</span> <span class='hs-layout'>(</span><span class='hs-conid'>LHSProj</span> <span class='hs-varid'>f</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>lhs</span> <span class='hs-varid'>ps</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mapM</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>mapM</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>mapM</span> <span class='hs-varid'>fromVarP</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>=</span>
<a name="line-196"></a> <span class='hs-varid'>lhsToPath</span> <span class='hs-layout'>(</span><span class='hs-conid'>ProjEntry</span> <span class='hs-varid'>f</span> <span class='hs-varid'>xs</span> <span class='hs-conop'>:</span> <span class='hs-varid'>acc</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>namedArg</span> <span class='hs-varid'>lhs</span>
<a name="line-197"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>fromVarP</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Pattern</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Name</span>
<a name="line-198"></a> <span class='hs-varid'>fromVarP</span> <span class='hs-layout'>(</span><span class='hs-conid'>VarP</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>n</span>
<a name="line-199"></a> <span class='hs-varid'>fromVarP</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-200"></a><span class='hs-definition'>lhsToPath</span> <span class='hs-varid'>acc</span> <span class='hs-layout'>(</span><span class='hs-conid'>LHSProj</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>lhs</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>NotImplemented</span> <span class='hs-varop'>$</span>
<a name="line-201"></a> <span class='hs-str'>"copatterns with patterns before the principal argument"</span>
<a name="line-202"></a>
<a name="line-203"></a><a name="pathToRecord"></a><span class='hs-comment'>-- | Expects a sorted list.</span>
<a name="line-204"></a><span class='hs-definition'>pathToRecord</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>ProjPath</span> <span class='hs-conid'>Expr</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ScopeM</span> <span class='hs-conid'>Expr</span>
<a name="line-205"></a><span class='hs-definition'>pathToRecord</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>__IMPOSSIBLE__</span>
<a name="line-206"></a><span class='hs-definition'>pathToRecord</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Path</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>e</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varid'>e</span>
<a name="line-207"></a><span class='hs-definition'>pathToRecord</span> <span class='hs-varid'>pps</span> <span class='hs-keyglyph'>=</span>
<a name="line-208"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>pathHeads</span> <span class='hs-varid'>pps</span> <span class='hs-keyword'>of</span>
<a name="line-209"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>GenericError</span> <span class='hs-varop'>$</span> <span class='hs-str'>"overlapping copattern clauses"</span>
<a name="line-210"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>pps</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-211"></a> <span class='hs-varid'>pes</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mapM</span> <span class='hs-layout'>(</span><span class='hs-varid'>mapSndM</span> <span class='hs-varid'>pathToRecord</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>groupPathes</span> <span class='hs-varid'>pps</span>
<a name="line-212"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>ei</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ExprRange</span> <span class='hs-varop'>$</span> <span class='hs-varid'>getRange</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-varid'>fst</span> <span class='hs-varid'>pes</span>
<a name="line-213"></a> <span class='hs-conid'>Rec</span> <span class='hs-varid'>ei</span> <span class='hs-varop'><$></span> <span class='hs-varid'>mapM</span> <span class='hs-varid'>abstractions</span> <span class='hs-varid'>pes</span>
<a name="line-214"></a>
<a name="line-215"></a> <span class='hs-keyword'>where</span>
<a name="line-216"></a> <span class='hs-varid'>abstractions</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>ProjEntry</span><span class='hs-layout'>,</span> <span class='hs-conid'>Expr</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ScopeM</span> <span class='hs-layout'>(</span><span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Name</span><span class='hs-layout'>,</span> <span class='hs-conid'>Expr</span><span class='hs-layout'>)</span>
<a name="line-217"></a> <span class='hs-varid'>abstractions</span> <span class='hs-layout'>(</span><span class='hs-conid'>ProjEntry</span> <span class='hs-varid'>p</span> <span class='hs-varid'>xs</span><span class='hs-layout'>,</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>unqualify</span> <span class='hs-varop'>$</span> <span class='hs-varid'>qnameToConcrete</span> <span class='hs-varid'>p</span><span class='hs-layout'>,</span><span class='hs-layout'>)</span> <span class='hs-varop'><$></span>
<a name="line-218"></a> <span class='hs-varid'>foldr</span> <span class='hs-varid'>abstract</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span>
<a name="line-219"></a>
<a name="line-220"></a> <span class='hs-varid'>abstract</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NamedArg</span> <span class='hs-conid'>Name</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ScopeM</span> <span class='hs-conid'>Expr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ScopeM</span> <span class='hs-conid'>Expr</span>
<a name="line-221"></a> <span class='hs-varid'>abstract</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arg</span> <span class='hs-varid'>h</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-conid'>Named</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>me</span> <span class='hs-keyglyph'>=</span>
<a name="line-222"></a> <span class='hs-conid'>Lam</span> <span class='hs-layout'>(</span><span class='hs-conid'>ExprRange</span> <span class='hs-varid'>noRange</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>DomainFree</span> <span class='hs-varid'>h</span> <span class='hs-varid'>r</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varop'><$></span> <span class='hs-varid'>me</span>
<a name="line-223"></a> <span class='hs-varid'>abstract</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arg</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Named</span> <span class='hs-conid'>Just</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>me</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>NotImplemented</span> <span class='hs-varop'>$</span>
<a name="line-224"></a> <span class='hs-str'>"named arguments in projection patterns"</span>
<a name="line-225"></a>
<a name="line-226"></a><a name="groupPathes"></a><span class='hs-comment'>-- | Similar to 'groupClauses'.</span>
<a name="line-227"></a><span class='hs-definition'>groupPathes</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>ProjEntry</span><span class='hs-layout'>,</span> <span class='hs-conid'>ProjPath</span> <span class='hs-conid'>Expr</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>ProjEntry</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>ProjPath</span> <span class='hs-conid'>Expr</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-228"></a><span class='hs-definition'>groupPathes</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-229"></a><span class='hs-definition'>groupPathes</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>pe</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>ProjEntry</span> <span class='hs-varid'>p</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>path</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>pps</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>pe</span><span class='hs-layout'>,</span> <span class='hs-varid'>path</span> <span class='hs-conop'>:</span> <span class='hs-varid'>grp</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>groupPathes</span> <span class='hs-varid'>rest</span>
<a name="line-230"></a> <span class='hs-comment'>-- Now group all following pps that have the same projection p</span>
<a name="line-231"></a> <span class='hs-comment'>-- We expect that they have alpha-equivalent xs</span>
<a name="line-232"></a> <span class='hs-keyword'>where</span>
<a name="line-233"></a> <span class='hs-layout'>(</span><span class='hs-varid'>grp</span><span class='hs-layout'>,</span> <span class='hs-varid'>rest</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>collect</span> <span class='hs-varid'>pps</span>
<a name="line-234"></a> <span class='hs-varid'>collect</span> <span class='hs-varid'>l</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>ProjEntry</span> <span class='hs-varid'>p'</span> <span class='hs-varid'>xs'</span><span class='hs-layout'>,</span> <span class='hs-varid'>path</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>pps</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>p</span> <span class='hs-varop'>==</span> <span class='hs-varid'>p'</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>rho</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>alpha</span> <span class='hs-varid'>xs'</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span>
<a name="line-235"></a> <span class='hs-comment'>-- add the alpha-converted path to the group</span>
<a name="line-236"></a> <span class='hs-comment'>-- NOTE: because the path contains only projections and pattern vars</span>
<a name="line-237"></a> <span class='hs-comment'>-- we only alpha-convert the content (rhs Expr)</span>
<a name="line-238"></a> <span class='hs-comment'>-- When the path will contain dot patterns, we have to rename in them</span>
<a name="line-239"></a> <span class='hs-varid'>mapFst</span> <span class='hs-layout'>(</span><span class='hs-varid'>mapContent</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename'</span> <span class='hs-varid'>rho</span><span class='hs-layout'>)</span> <span class='hs-varid'>path</span> <span class='hs-conop'>:</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>collect</span> <span class='hs-varid'>pps</span>
<a name="line-240"></a> <span class='hs-varid'>collect</span> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>[]</span><span class='hs-layout'>,</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- null or different projection: close group</span>
<a name="line-241"></a>
<a name="line-242"></a><a name="pathHeads"></a><span class='hs-definition'>pathHeads</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Path</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Path</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-243"></a><span class='hs-definition'>pathHeads</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapM</span> <span class='hs-varid'>pathSplit</span>
<a name="line-244"></a>
<a name="line-245"></a><a name="pathSplit"></a><span class='hs-definition'>pathSplit</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Path</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Path</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-246"></a><span class='hs-definition'>pathSplit</span> <span class='hs-layout'>(</span><span class='hs-conid'>Path</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-247"></a><span class='hs-definition'>pathSplit</span> <span class='hs-layout'>(</span><span class='hs-conid'>Path</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-conop'>:</span><span class='hs-keyword'>as</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Path</span> <span class='hs-keyword'>as</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-248"></a>
<a name="line-249"></a>
<a name="line-250"></a><span class='hs-comment'>-- * Alpha conversion</span>
<a name="line-251"></a>
<a name="line-252"></a><a name="NameMap"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>NameMap</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>Name</span><span class='hs-layout'>,</span><span class='hs-conid'>Name</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-253"></a>
<a name="line-254"></a><a name="Rename"></a><span class='hs-keyword'>class</span> <span class='hs-conid'>Rename</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>where</span>
<a name="line-255"></a> <span class='hs-varid'>rename</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Name</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Name</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span>
<a name="line-256"></a> <span class='hs-varid'>rename'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NameMap</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span>
<a name="line-257"></a> <span class='hs-varid'>rename'</span> <span class='hs-varid'>rho</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>rename</span> <span class='hs-layout'>(</span><span class='hs-varid'>flip</span> <span class='hs-varid'>lookup</span> <span class='hs-varid'>rho</span><span class='hs-layout'>)</span>
<a name="line-258"></a>
<a name="line-259"></a><a name="instance%20Rename%20Expr"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Rename</span> <span class='hs-conid'>Expr</span> <span class='hs-keyword'>where</span>
<a name="line-260"></a> <span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span>
<a name="line-261"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>of</span>
<a name="line-262"></a> <span class='hs-conid'>Var</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Var</span> <span class='hs-varop'>$</span> <span class='hs-varid'>maybe</span> <span class='hs-varid'>x</span> <span class='hs-varid'>id</span> <span class='hs-layout'>(</span><span class='hs-varid'>rho</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-263"></a> <span class='hs-conid'>Def</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span>
<a name="line-264"></a> <span class='hs-conid'>Con</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span>
<a name="line-265"></a> <span class='hs-conid'>Lit</span> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span>
<a name="line-266"></a> <span class='hs-conid'>QuestionMark</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span>
<a name="line-267"></a> <span class='hs-conid'>Underscore</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span>
<a name="line-268"></a> <span class='hs-conid'>App</span> <span class='hs-varid'>i</span> <span class='hs-varid'>e</span> <span class='hs-varid'>es</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>App</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>es</span><span class='hs-layout'>)</span>
<a name="line-269"></a> <span class='hs-conid'>WithApp</span> <span class='hs-varid'>i</span> <span class='hs-varid'>e</span> <span class='hs-varid'>es</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>WithApp</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>es</span><span class='hs-layout'>)</span>
<a name="line-270"></a> <span class='hs-conid'>Lam</span> <span class='hs-varid'>i</span> <span class='hs-varid'>lb</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Lam</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>lb</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-271"></a> <span class='hs-conid'>AbsurdLam</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span>
<a name="line-272"></a> <span class='hs-conid'>ExtendedLam</span> <span class='hs-varid'>i</span> <span class='hs-varid'>i'</span> <span class='hs-varid'>n</span> <span class='hs-varid'>cs</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ExtendedLam</span> <span class='hs-varid'>i</span> <span class='hs-varid'>i'</span> <span class='hs-varid'>n</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span>
<a name="line-273"></a> <span class='hs-conid'>Pi</span> <span class='hs-varid'>i</span> <span class='hs-varid'>tel</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Pi</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>tel</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-274"></a> <span class='hs-conid'>Fun</span> <span class='hs-varid'>i</span> <span class='hs-varid'>a</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Fun</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-275"></a> <span class='hs-conid'>Set</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span>
<a name="line-276"></a> <span class='hs-conid'>Prop</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span>
<a name="line-277"></a> <span class='hs-conid'>Let</span> <span class='hs-varid'>i</span> <span class='hs-varid'>bs</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Let</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>bs</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-278"></a> <span class='hs-conid'>ETel</span> <span class='hs-varid'>tel</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ETel</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>tel</span><span class='hs-layout'>)</span>
<a name="line-279"></a> <span class='hs-conid'>Rec</span> <span class='hs-varid'>i</span> <span class='hs-varid'>fes</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rec</span> <span class='hs-varid'>i</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>id</span> <span class='hs-varop'>-*-</span> <span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span><span class='hs-layout'>)</span> <span class='hs-varid'>fes</span>
<a name="line-280"></a> <span class='hs-conid'>RecUpdate</span> <span class='hs-varid'>i</span> <span class='hs-varid'>e</span> <span class='hs-varid'>fes</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>RecUpdate</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>id</span> <span class='hs-varop'>-*-</span> <span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span><span class='hs-layout'>)</span> <span class='hs-varid'>fes</span>
<a name="line-281"></a> <span class='hs-conid'>ScopedExpr</span> <span class='hs-varid'>i</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ScopedExpr</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-282"></a> <span class='hs-conid'>QuoteGoal</span> <span class='hs-varid'>i</span> <span class='hs-varid'>n</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QuoteGoal</span> <span class='hs-varid'>i</span> <span class='hs-varid'>n</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-283"></a> <span class='hs-conid'>Quote</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span>
<a name="line-284"></a> <span class='hs-conid'>QuoteTerm</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span>
<a name="line-285"></a> <span class='hs-conid'>Unquote</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span>
<a name="line-286"></a> <span class='hs-conid'>DontCare</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DontCare</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-287"></a> <span class='hs-conid'>PatternSyn</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span>
<a name="line-288"></a>
<a name="line-289"></a><a name="instance%20Rename%20LetBinding"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Rename</span> <span class='hs-conid'>LetBinding</span> <span class='hs-keyword'>where</span>
<a name="line-290"></a> <span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span>
<a name="line-291"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>of</span>
<a name="line-292"></a> <span class='hs-conid'>LetBind</span> <span class='hs-varid'>i</span> <span class='hs-varid'>r</span> <span class='hs-varid'>n</span> <span class='hs-varid'>e</span> <span class='hs-varid'>e'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>LetBind</span> <span class='hs-varid'>i</span> <span class='hs-varid'>r</span> <span class='hs-varid'>n</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>e'</span><span class='hs-layout'>)</span>
<a name="line-293"></a> <span class='hs-conid'>LetPatBind</span> <span class='hs-varid'>i</span> <span class='hs-varid'>p</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>LetPatBind</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-294"></a> <span class='hs-conid'>LetApply</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span>
<a name="line-295"></a> <span class='hs-conid'>LetOpen</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span>
<a name="line-296"></a>
<a name="line-297"></a><a name="instance%20Rename%20LamBinding"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Rename</span> <span class='hs-conid'>LamBinding</span> <span class='hs-keyword'>where</span>
<a name="line-298"></a> <span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span>
<a name="line-299"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>of</span>
<a name="line-300"></a> <span class='hs-conid'>DomainFree</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span>
<a name="line-301"></a> <span class='hs-conid'>DomainFull</span> <span class='hs-varid'>tb</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DomainFull</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>tb</span><span class='hs-layout'>)</span>
<a name="line-302"></a>
<a name="line-303"></a><a name="instance%20Rename%20TypedBindings"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Rename</span> <span class='hs-conid'>TypedBindings</span> <span class='hs-keyword'>where</span>
<a name="line-304"></a> <span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-layout'>(</span><span class='hs-conid'>TypedBindings</span> <span class='hs-varid'>r</span> <span class='hs-varid'>tb</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TypedBindings</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>tb</span><span class='hs-layout'>)</span>
<a name="line-305"></a>
<a name="line-306"></a><a name="instance%20Rename%20TypedBinding"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Rename</span> <span class='hs-conid'>TypedBinding</span> <span class='hs-keyword'>where</span>
<a name="line-307"></a> <span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-layout'>(</span><span class='hs-conid'>TBind</span> <span class='hs-varid'>r</span> <span class='hs-varid'>ns</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TBind</span> <span class='hs-varid'>r</span> <span class='hs-varid'>ns</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-308"></a> <span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-layout'>(</span><span class='hs-conid'>TNoBind</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TNoBind</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-309"></a>
<a name="line-310"></a><a name="instance%20Rename%20Clause"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Rename</span> <span class='hs-conid'>Clause</span> <span class='hs-keyword'>where</span>
<a name="line-311"></a> <span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-layout'>(</span><span class='hs-conid'>Clause</span> <span class='hs-varid'>lhs</span> <span class='hs-varid'>rhs</span> <span class='hs-varid'>wheredecls</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-312"></a> <span class='hs-conid'>Clause</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>lhs</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>rhs</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>wheredecls</span><span class='hs-layout'>)</span>
<a name="line-313"></a>
<a name="line-314"></a><a name="instance%20Rename%20RHS"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Rename</span> <span class='hs-conid'>RHS</span> <span class='hs-keyword'>where</span>
<a name="line-315"></a> <span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>of</span>
<a name="line-316"></a> <span class='hs-conid'>RHS</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>RHS</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-317"></a> <span class='hs-conid'>AbsurdRHS</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span>
<a name="line-318"></a> <span class='hs-conid'>WithRHS</span> <span class='hs-varid'>n</span> <span class='hs-varid'>es</span> <span class='hs-varid'>cs</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>WithRHS</span> <span class='hs-varid'>n</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>es</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span>
<a name="line-319"></a> <span class='hs-conid'>RewriteRHS</span> <span class='hs-varid'>ns</span> <span class='hs-varid'>es</span> <span class='hs-varid'>r</span> <span class='hs-varid'>ds</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>RewriteRHS</span> <span class='hs-varid'>ns</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>es</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>ds</span><span class='hs-layout'>)</span>
<a name="line-320"></a>
<a name="line-321"></a><a name="instance%20Rename%20LHS"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Rename</span> <span class='hs-conid'>LHS</span> <span class='hs-keyword'>where</span>
<a name="line-322"></a> <span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-layout'>(</span><span class='hs-conid'>LHS</span> <span class='hs-varid'>i</span> <span class='hs-varid'>core</span> <span class='hs-varid'>ps</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LHS</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>core</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>ps</span><span class='hs-layout'>)</span>
<a name="line-323"></a>
<a name="line-324"></a><a name="instance%20Rename%20LHSCore"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Rename</span> <span class='hs-conid'>LHSCore</span> <span class='hs-keyword'>where</span>
<a name="line-325"></a> <span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- only rename in dot patterns</span>
<a name="line-326"></a><span class='hs-comment'>{-
<a name="line-327"></a> rename rho = ren where
<a name="line-328"></a> ren e = case e of
<a name="line-329"></a> LHSHead f ps -> LHSHead f (ren ps)
<a name="line-330"></a> LHSProj d ps1 core ps2 -> LHSProj d (ren ps1) (ren core) (ren ps2)
<a name="line-331"></a>-}</span>
<a name="line-332"></a>
<a name="line-333"></a><a name="instance%20Rename%20Pattern"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Rename</span> <span class='hs-conid'>Pattern</span> <span class='hs-keyword'>where</span>
<a name="line-334"></a> <span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- only rename in dot patterns</span>
<a name="line-335"></a>
<a name="line-336"></a><a name="instance%20Rename%20Declaration"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Rename</span> <span class='hs-conid'>Declaration</span> <span class='hs-keyword'>where</span>
<a name="line-337"></a> <span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-varid'>d</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>__IMPOSSIBLE__</span>
<a name="line-338"></a>
<a name="line-339"></a><a name="instance%20Rename%20(Arg%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Rename</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Rename</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arg</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-340"></a> <span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span><span class='hs-layout'>)</span>
<a name="line-341"></a>
<a name="line-342"></a><a name="instance%20Rename%20(Named%20n%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Rename</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Rename</span> <span class='hs-layout'>(</span><span class='hs-conid'>Named</span> <span class='hs-varid'>n</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-343"></a> <span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span><span class='hs-layout'>)</span>
<a name="line-344"></a>
<a name="line-345"></a><a name="instance%20Rename%20%5ba%5d"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Rename</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Rename</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyword'>where</span>
<a name="line-346"></a> <span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>rename</span> <span class='hs-varid'>rho</span><span class='hs-layout'>)</span>
<a name="line-347"></a>
<a name="line-348"></a>
<a name="line-349"></a>
<a name="line-350"></a>
<a name="line-351"></a><a name="Alpha"></a><span class='hs-comment'>-- | Alpha-Equivalence of patterns, ignoring dot patterns</span>
<a name="line-352"></a><a name="Alpha"></a><span class='hs-keyword'>class</span> <span class='hs-conid'>Alpha</span> <span class='hs-varid'>t</span> <span class='hs-keyword'>where</span>
<a name="line-353"></a> <span class='hs-varid'>alpha</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>NameMap</span>
<a name="line-354"></a> <span class='hs-varid'>alpha</span> <span class='hs-varid'>t</span> <span class='hs-varid'>t'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>snd</span> <span class='hs-varop'>$</span> <span class='hs-varid'>runWriterT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>alpha'</span> <span class='hs-varid'>t</span> <span class='hs-varid'>t'</span>
<a name="line-355"></a>
<a name="line-356"></a> <span class='hs-varid'>alpha'</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>WriterT</span> <span class='hs-conid'>NameMap</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>()</span>
<a name="line-357"></a> <span class='hs-varid'>alpha'</span> <span class='hs-varid'>t</span> <span class='hs-varid'>t'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>WriterT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-conid'>()</span><span class='hs-layout'>,</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>alpha</span> <span class='hs-varid'>t</span> <span class='hs-varid'>t'</span>
<a name="line-358"></a>
<a name="line-359"></a><a name="instance%20Alpha%20Name"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Alpha</span> <span class='hs-conid'>Name</span> <span class='hs-keyword'>where</span>
<a name="line-360"></a> <span class='hs-varid'>alpha'</span> <span class='hs-varid'>x</span> <span class='hs-varid'>x'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>tell1</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-varid'>x'</span><span class='hs-layout'>)</span>
<a name="line-361"></a>
<a name="line-362"></a><a name="instance%20Alpha%20(Pattern'%20e)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Alpha</span> <span class='hs-layout'>(</span><span class='hs-conid'>Pattern'</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-363"></a> <span class='hs-varid'>alpha'</span> <span class='hs-varid'>p</span> <span class='hs-varid'>p'</span> <span class='hs-keyglyph'>=</span>
<a name="line-364"></a> <span class='hs-keyword'>case</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span><span class='hs-layout'>,</span><span class='hs-varid'>p'</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-365"></a> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>VarP</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conid'>VarP</span> <span class='hs-varid'>x'</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>tell1</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-varid'>x'</span><span class='hs-layout'>)</span>
<a name="line-366"></a> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>ConP</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x</span> <span class='hs-varid'>ps</span><span class='hs-layout'>)</span> <span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conid'>ConP</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x'</span> <span class='hs-varid'>ps'</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>guard</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>x'</span><span class='hs-layout'>)</span> <span class='hs-varop'>>></span> <span class='hs-varid'>alpha'</span> <span class='hs-varid'>ps</span> <span class='hs-varid'>ps'</span>
<a name="line-367"></a> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>DefP</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x</span> <span class='hs-varid'>ps</span><span class='hs-layout'>)</span> <span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conid'>DefP</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x'</span> <span class='hs-varid'>ps'</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>guard</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>x'</span><span class='hs-layout'>)</span> <span class='hs-varop'>>></span> <span class='hs-varid'>alpha'</span> <span class='hs-varid'>ps</span> <span class='hs-varid'>ps'</span>
<a name="line-368"></a> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>WildP</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conid'>WildP</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-369"></a> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>AsP</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conid'>AsP</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x'</span> <span class='hs-varid'>p'</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>tell1</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-varid'>x'</span><span class='hs-layout'>)</span> <span class='hs-varop'>>></span> <span class='hs-varid'>alpha'</span> <span class='hs-varid'>p</span> <span class='hs-varid'>p'</span>
<a name="line-370"></a> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>DotP</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conid'>DotP</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-371"></a> <span class='hs-layout'>(</span><span class='hs-conid'>AbsurdP</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-layout'>,</span> <span class='hs-conid'>AbsurdP</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-372"></a> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>LitP</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conid'>LitP</span> <span class='hs-varid'>l'</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>guard</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span> <span class='hs-varop'>==</span> <span class='hs-varid'>l'</span><span class='hs-layout'>)</span>
<a name="line-373"></a> <span class='hs-layout'>(</span><span class='hs-conid'>ImplicitP</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-layout'>,</span> <span class='hs-conid'>ImplicitP</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-374"></a> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>PatternSynP</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x</span> <span class='hs-varid'>ps</span><span class='hs-layout'>)</span> <span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatternSynP</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x'</span> <span class='hs-varid'>ps'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>guard</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>x'</span><span class='hs-layout'>)</span> <span class='hs-varop'>>></span> <span class='hs-varid'>alpha'</span> <span class='hs-varid'>ps</span> <span class='hs-varid'>ps'</span>
<a name="line-375"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span> <span class='hs-layout'>,</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fail</span> <span class='hs-str'>"not alpha equivalent"</span>
<a name="line-376"></a>
<a name="line-377"></a><a name="tell1"></a><span class='hs-definition'>tell1</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>MonadWriter</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-conid'>()</span>
<a name="line-378"></a><span class='hs-definition'>tell1</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>tell</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span>
<a name="line-379"></a>
<a name="line-380"></a><span class='hs-keyword'>deriving</span> <span class='hs-keyword'>instance</span> <span class='hs-conid'>Eq</span> <span class='hs-conid'>AmbiguousQName</span>
<a name="line-381"></a>
<a name="line-382"></a><a name="instance%20Alpha%20(LHSCore'%20e)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Alpha</span> <span class='hs-layout'>(</span><span class='hs-conid'>LHSCore'</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-383"></a> <span class='hs-varid'>alpha'</span> <span class='hs-layout'>(</span><span class='hs-conid'>LHSHead</span> <span class='hs-varid'>f</span> <span class='hs-varid'>ps</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>LHSHead</span> <span class='hs-varid'>f'</span> <span class='hs-varid'>ps'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>guard</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varop'>==</span> <span class='hs-varid'>f'</span><span class='hs-layout'>)</span> <span class='hs-varop'>>></span> <span class='hs-varid'>alpha'</span> <span class='hs-varid'>ps</span> <span class='hs-varid'>ps'</span>
<a name="line-384"></a> <span class='hs-varid'>alpha'</span> <span class='hs-layout'>(</span><span class='hs-conid'>LHSProj</span> <span class='hs-varid'>d</span> <span class='hs-varid'>ps1</span> <span class='hs-varid'>lhs</span> <span class='hs-varid'>ps2</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>LHSProj</span> <span class='hs-varid'>d'</span> <span class='hs-varid'>ps1'</span> <span class='hs-varid'>lhs'</span> <span class='hs-varid'>ps2'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-385"></a> <span class='hs-varid'>guard</span> <span class='hs-layout'>(</span><span class='hs-varid'>d</span> <span class='hs-varop'>==</span> <span class='hs-varid'>d'</span><span class='hs-layout'>)</span> <span class='hs-varop'>>></span> <span class='hs-varid'>alpha'</span> <span class='hs-varid'>ps1</span> <span class='hs-varid'>ps1'</span> <span class='hs-varop'>>></span> <span class='hs-varid'>alpha'</span> <span class='hs-varid'>lhs</span> <span class='hs-varid'>lhs'</span> <span class='hs-varop'>>></span> <span class='hs-varid'>alpha'</span> <span class='hs-varid'>ps2</span> <span class='hs-varid'>ps2'</span>
<a name="line-386"></a> <span class='hs-varid'>alpha'</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fail</span> <span class='hs-str'>"not alpha equivalent"</span>
<a name="line-387"></a>
<a name="line-388"></a><a name="instance%20Alpha%20LHS"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Alpha</span> <span class='hs-conid'>LHS</span> <span class='hs-keyword'>where</span>
<a name="line-389"></a> <span class='hs-varid'>alpha'</span> <span class='hs-layout'>(</span><span class='hs-conid'>LHS</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>core</span> <span class='hs-varid'>wps</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>LHS</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>core'</span> <span class='hs-varid'>wps'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>alpha'</span> <span class='hs-varid'>core</span> <span class='hs-varid'>core'</span> <span class='hs-varop'>>></span> <span class='hs-varid'>alpha'</span> <span class='hs-varid'>wps</span> <span class='hs-varid'>wps'</span>
<a name="line-390"></a>
<a name="line-391"></a><a name="instance%20Alpha%20(Arg%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Alpha</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Alpha</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arg</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-392"></a> <span class='hs-varid'>alpha'</span> <span class='hs-varid'>a</span> <span class='hs-varid'>a'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>alpha'</span> <span class='hs-layout'>(</span><span class='hs-varid'>unArg</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>unArg</span> <span class='hs-varid'>a'</span><span class='hs-layout'>)</span>
<a name="line-393"></a>
<a name="line-394"></a><a name="instance%20Alpha%20(Named%20n%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span> <span class='hs-varid'>n</span><span class='hs-layout'>,</span> <span class='hs-conid'>Alpha</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Alpha</span> <span class='hs-layout'>(</span><span class='hs-conid'>Named</span> <span class='hs-varid'>n</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-395"></a> <span class='hs-varid'>alpha'</span> <span class='hs-varid'>a</span> <span class='hs-varid'>a'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>guard</span> <span class='hs-layout'>(</span><span class='hs-varid'>nameOf</span> <span class='hs-varid'>a</span> <span class='hs-varop'>==</span> <span class='hs-varid'>nameOf</span> <span class='hs-varid'>a'</span><span class='hs-layout'>)</span> <span class='hs-varop'>>></span> <span class='hs-varid'>alpha'</span> <span class='hs-layout'>(</span><span class='hs-varid'>namedThing</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>namedThing</span> <span class='hs-varid'>a'</span><span class='hs-layout'>)</span>
<a name="line-396"></a>
<a name="line-397"></a><a name="instance%20Alpha%20%5ba%5d"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Alpha</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Alpha</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyword'>where</span>
<a name="line-398"></a> <span class='hs-varid'>alpha'</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>guard</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span> <span class='hs-varid'>l</span> <span class='hs-varop'>==</span> <span class='hs-varid'>length</span> <span class='hs-varid'>l'</span><span class='hs-layout'>)</span> <span class='hs-varop'>>></span> <span class='hs-varid'>zipWithM_</span> <span class='hs-varid'>alpha'</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l'</span>
<a name="line-399"></a>
<a name="line-400"></a><a name="instance%20Eq%20(Pattern'%20e)"></a><span class='hs-comment'>-- | Literal equality of patterns, ignoring dot patterns</span>
<a name="line-401"></a><a name="instance%20Eq%20(Pattern'%20e)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Eq</span> <span class='hs-layout'>(</span><span class='hs-conid'>Pattern'</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-402"></a> <span class='hs-varid'>p</span> <span class='hs-varop'>==</span> <span class='hs-varid'>p'</span> <span class='hs-keyglyph'>=</span>
<a name="line-403"></a> <span class='hs-keyword'>case</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span><span class='hs-layout'>,</span><span class='hs-varid'>p'</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-404"></a> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>VarP</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conid'>VarP</span> <span class='hs-varid'>x'</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>x</span> <span class='hs-varop'>===</span> <span class='hs-varid'>x'</span>
<a name="line-405"></a> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>ConP</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x</span> <span class='hs-varid'>ps</span><span class='hs-layout'>)</span> <span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conid'>ConP</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x'</span> <span class='hs-varid'>ps'</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>x'</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>ps</span> <span class='hs-varop'>==</span> <span class='hs-varid'>ps'</span>
<a name="line-406"></a> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>DefP</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x</span> <span class='hs-varid'>ps</span><span class='hs-layout'>)</span> <span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conid'>DefP</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x'</span> <span class='hs-varid'>ps'</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>x'</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>ps</span> <span class='hs-varop'>==</span> <span class='hs-varid'>ps'</span>
<a name="line-407"></a> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>WildP</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conid'>WildP</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>True</span>
<a name="line-408"></a> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>AsP</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conid'>AsP</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x'</span> <span class='hs-varid'>p'</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>x</span> <span class='hs-varop'>===</span> <span class='hs-varid'>x'</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>p</span> <span class='hs-varop'>==</span> <span class='hs-varid'>p'</span>
<a name="line-409"></a> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>DotP</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conid'>DotP</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>True</span>
<a name="line-410"></a> <span class='hs-layout'>(</span><span class='hs-conid'>AbsurdP</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-layout'>,</span> <span class='hs-conid'>AbsurdP</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>True</span>
<a name="line-411"></a> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>LitP</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conid'>LitP</span> <span class='hs-varid'>l'</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>l</span> <span class='hs-varop'>==</span> <span class='hs-varid'>l'</span>
<a name="line-412"></a> <span class='hs-layout'>(</span><span class='hs-conid'>ImplicitP</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-layout'>,</span> <span class='hs-conid'>ImplicitP</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>True</span>
<a name="line-413"></a> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>PatternSynP</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x</span> <span class='hs-varid'>ps</span><span class='hs-layout'>)</span> <span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatternSynP</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x'</span> <span class='hs-varid'>ps'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>x'</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>ps</span> <span class='hs-varop'>==</span> <span class='hs-varid'>ps'</span>
<a name="line-414"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span> <span class='hs-layout'>,</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>False</span>
<a name="line-415"></a> <span class='hs-keyword'>where</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Name</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Name</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-varop'>===</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Name</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Name</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x'</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-416"></a> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Name</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>NoName</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-varop'>===</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Name</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>NoName</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-417"></a> <span class='hs-keyword'>_</span> <span class='hs-varop'>===</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-418"></a>
<a name="line-419"></a><span class='hs-keyword'>deriving</span> <span class='hs-keyword'>instance</span> <span class='hs-conid'>Eq</span> <span class='hs-layout'>(</span><span class='hs-conid'>LHSCore'</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-420"></a>
<a name="line-421"></a><a name="instance%20Eq%20LHS"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Eq</span> <span class='hs-conid'>LHS</span> <span class='hs-keyword'>where</span>
<a name="line-422"></a> <span class='hs-layout'>(</span><span class='hs-conid'>LHS</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>core</span> <span class='hs-varid'>wps</span><span class='hs-layout'>)</span> <span class='hs-varop'>==</span> <span class='hs-layout'>(</span><span class='hs-conid'>LHS</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>core'</span> <span class='hs-varid'>wps'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>core</span> <span class='hs-varop'>==</span> <span class='hs-varid'>core'</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>wps</span> <span class='hs-varop'>==</span> <span class='hs-varid'>wps'</span>
</pre></body>
</html>
