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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE CPP #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# LANGUAGE TypeOperators #-}</span>
<a name="line-3"></a><span class='hs-comment'>{-# LANGUAGE RankNTypes #-}</span>
<a name="line-4"></a><span class='hs-comment'>{-# LANGUAGE ScopedTypeVariables #-}</span>
<a name="line-5"></a>
<a name="line-6"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ >= 702</span>
<a name="line-7"></a><span class='hs-comment'>{-# LANGUAGE Trustworthy #-}</span>
<a name="line-8"></a><span class='hs-cpp'>#endif</span>
<a name="line-9"></a>
<a name="line-10"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-11"></a><span class='hs-comment'>-- |</span>
<a name="line-12"></a><span class='hs-comment'>-- Copyright : (C) 2011-2015 Edward Kmett,</span>
<a name="line-13"></a><span class='hs-comment'>-- License : BSD-style (see the file LICENSE)</span>
<a name="line-14"></a><span class='hs-comment'>--</span>
<a name="line-15"></a><span class='hs-comment'>-- Maintainer : Edward Kmett <ekmett@gmail.com></span>
<a name="line-16"></a><span class='hs-comment'>-- Stability : provisional</span>
<a name="line-17"></a><span class='hs-comment'>-- Portability : portable</span>
<a name="line-18"></a><span class='hs-comment'>--</span>
<a name="line-19"></a><span class='hs-comment'>-- For a good explanation of profunctors in Haskell see Dan Piponi's article:</span>
<a name="line-20"></a><span class='hs-comment'>--</span>
<a name="line-21"></a><span class='hs-comment'>-- <<a href="http://blog.sigfpe.com/2011/07/profunctors-in-haskell.html">http://blog.sigfpe.com/2011/07/profunctors-in-haskell.html</a>></span>
<a name="line-22"></a><span class='hs-comment'>--</span>
<a name="line-23"></a><span class='hs-comment'>-- For more information on strength and costrength, see:</span>
<a name="line-24"></a><span class='hs-comment'>--</span>
<a name="line-25"></a><span class='hs-comment'>-- <<a href="http://comonad.com/reader/2008/deriving-strength-from-laziness/">http://comonad.com/reader/2008/deriving-strength-from-laziness/</a>></span>
<a name="line-26"></a><span class='hs-comment'>----------------------------------------------------------------------------</span>
<a name="line-27"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Profunctor</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span>
<a name="line-28"></a> <span class='hs-layout'>(</span> <span class='hs-conid'>Profunctor</span><span class='hs-layout'>(</span><span class='hs-varid'>dimap</span><span class='hs-layout'>,</span> <span class='hs-varid'>lmap</span><span class='hs-layout'>,</span> <span class='hs-varid'>rmap</span><span class='hs-layout'>)</span>
<a name="line-29"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Star</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-30"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Costar</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-31"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>WrappedArrow</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-32"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Forget</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-33"></a><span class='hs-cpp'>#ifndef HLINT</span>
<a name="line-34"></a> <span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conop'>:-></span><span class='hs-layout'>)</span>
<a name="line-35"></a><span class='hs-cpp'>#endif</span>
<a name="line-36"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-37"></a>
<a name="line-38"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Applicative</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-conid'>WrappedArrow</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-39"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Arrow</span>
<a name="line-40"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Category</span>
<a name="line-41"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Comonad</span>
<a name="line-42"></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-layout'>(</span><span class='hs-conid'>MonadPlus</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-43"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Distributive</span>
<a name="line-44"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Foldable</span>
<a name="line-45"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Monoid</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-conid'>Product</span><span class='hs-layout'>)</span>
<a name="line-46"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Profunctor</span><span class='hs-varop'>.</span><span class='hs-conid'>Unsafe</span>
<a name="line-47"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Traversable</span>
<a name="line-48"></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'>id</span><span class='hs-layout'>,</span><span class='hs-layout'>(</span><span class='hs-varop'>.</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-varid'>sequence</span><span class='hs-layout'>)</span>
<a name="line-49"></a>
<a name="line-50"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ >= 708</span>
<a name="line-51"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Coerce</span>
<a name="line-52"></a><span class='hs-cpp'>#else</span>
<a name="line-53"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Unsafe</span><span class='hs-varop'>.</span><span class='hs-conid'>Coerce</span>
<a name="line-54"></a><span class='hs-cpp'>#endif</span>
<a name="line-55"></a>
<a name="line-56"></a><span class='hs-keyword'>infixr</span> <span class='hs-num'>0</span> <span class='hs-conop'>:-></span>
<a name="line-57"></a><span class='hs-keyword'>type</span> <span class='hs-varid'>p</span> <span class='hs-conop'>:-></span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-varop'>.</span> <span class='hs-varid'>p</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>q</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span>
<a name="line-58"></a>
<a name="line-59"></a><span class='hs-comment'>------------------------------------------------------------------------------</span>
<a name="line-60"></a><span class='hs-comment'>-- Star</span>
<a name="line-61"></a><span class='hs-comment'>------------------------------------------------------------------------------</span>
<a name="line-62"></a>
<a name="line-63"></a><a name="Star"></a><span class='hs-comment'>-- | Lift a 'Functor' into a 'Profunctor' (forwards).</span>
<a name="line-64"></a><a name="Star"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Star</span> <span class='hs-varid'>f</span> <span class='hs-varid'>d</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Star</span> <span class='hs-layout'>{</span> <span class='hs-varid'>runStar</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>d</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span> <span class='hs-varid'>c</span> <span class='hs-layout'>}</span>
<a name="line-65"></a>
<a name="line-66"></a><a name="instance%20Profunctor%20(Star%20f)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Profunctor</span> <span class='hs-layout'>(</span><span class='hs-conid'>Star</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-67"></a> <span class='hs-varid'>dimap</span> <span class='hs-varid'>ab</span> <span class='hs-varid'>cd</span> <span class='hs-layout'>(</span><span class='hs-conid'>Star</span> <span class='hs-varid'>bfc</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Star</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>cd</span> <span class='hs-varop'>.</span> <span class='hs-varid'>bfc</span> <span class='hs-varop'>.</span> <span class='hs-varid'>ab</span><span class='hs-layout'>)</span>
<a name="line-68"></a> <span class='hs-comment'>{-# INLINE dimap #-}</span>
<a name="line-69"></a> <span class='hs-varid'>lmap</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Star</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Star</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varop'>.</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span>
<a name="line-70"></a> <span class='hs-comment'>{-# INLINE lmap #-}</span>
<a name="line-71"></a> <span class='hs-varid'>rmap</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Star</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Star</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>k</span> <span class='hs-varop'>.</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span>
<a name="line-72"></a> <span class='hs-comment'>{-# INLINE rmap #-}</span>
<a name="line-73"></a> <span class='hs-comment'>-- We cannot safely overload ( #. ) because we didn't write the 'Functor'.</span>
<a name="line-74"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ >= 708</span>
<a name="line-75"></a> <span class='hs-varid'>p</span> <span class='hs-varop'>.#</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>coerce</span> <span class='hs-varid'>p</span>
<a name="line-76"></a><span class='hs-cpp'>#else</span>
<a name="line-77"></a> <span class='hs-varid'>p</span> <span class='hs-varop'>.#</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafeCoerce</span> <span class='hs-varid'>p</span>
<a name="line-78"></a><span class='hs-cpp'>#endif</span>
<a name="line-79"></a> <span class='hs-comment'>{-# INLINE ( .# ) #-}</span>
<a name="line-80"></a>
<a name="line-81"></a><a name="instance%20Functor%20(Star%20f%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-conid'>Star</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-82"></a> <span class='hs-varid'>fmap</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>rmap</span>
<a name="line-83"></a> <span class='hs-comment'>{-# INLINE fmap #-}</span>
<a name="line-84"></a>
<a name="line-85"></a><a name="instance%20Applicative%20(Star%20f%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Applicative</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Applicative</span> <span class='hs-layout'>(</span><span class='hs-conid'>Star</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-86"></a> <span class='hs-varid'>pure</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Star</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>pure</span> <span class='hs-varid'>a</span>
<a name="line-87"></a> <span class='hs-conid'>Star</span> <span class='hs-varid'>ff</span> <span class='hs-varop'><*></span> <span class='hs-conid'>Star</span> <span class='hs-varid'>fx</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Star</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>ff</span> <span class='hs-varid'>a</span> <span class='hs-varop'><*></span> <span class='hs-varid'>fx</span> <span class='hs-varid'>a</span>
<a name="line-88"></a> <span class='hs-conid'>Star</span> <span class='hs-varid'>ff</span> <span class='hs-varop'>*></span> <span class='hs-conid'>Star</span> <span class='hs-varid'>fx</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Star</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>ff</span> <span class='hs-varid'>a</span> <span class='hs-varop'>*></span> <span class='hs-varid'>fx</span> <span class='hs-varid'>a</span>
<a name="line-89"></a> <span class='hs-conid'>Star</span> <span class='hs-varid'>ff</span> <span class='hs-varop'><*</span> <span class='hs-conid'>Star</span> <span class='hs-varid'>fx</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Star</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>ff</span> <span class='hs-varid'>a</span> <span class='hs-varop'><*</span> <span class='hs-varid'>fx</span> <span class='hs-varid'>a</span>
<a name="line-90"></a>
<a name="line-91"></a><a name="instance%20Alternative%20(Star%20f%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Alternative</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Alternative</span> <span class='hs-layout'>(</span><span class='hs-conid'>Star</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-92"></a> <span class='hs-varid'>empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Star</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>empty</span>
<a name="line-93"></a> <span class='hs-conid'>Star</span> <span class='hs-varid'>f</span> <span class='hs-varop'><|></span> <span class='hs-conid'>Star</span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Star</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span> <span class='hs-varop'><|></span> <span class='hs-varid'>g</span> <span class='hs-varid'>a</span>
<a name="line-94"></a>
<a name="line-95"></a><a name="instance%20Monad%20(Star%20f%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Monad</span> <span class='hs-layout'>(</span><span class='hs-conid'>Star</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-96"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ < 710</span>
<a name="line-97"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Star</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varid'>a</span>
<a name="line-98"></a><span class='hs-cpp'>#endif</span>
<a name="line-99"></a> <span class='hs-conid'>Star</span> <span class='hs-varid'>m</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Star</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-100"></a> <span class='hs-varid'>a</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>m</span> <span class='hs-varid'>e</span>
<a name="line-101"></a> <span class='hs-varid'>runStar</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span>
<a name="line-102"></a>
<a name="line-103"></a><a name="instance%20MonadPlus%20(Star%20f%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>MonadPlus</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>MonadPlus</span> <span class='hs-layout'>(</span><span class='hs-conid'>Star</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-104"></a> <span class='hs-varid'>mzero</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Star</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>mzero</span>
<a name="line-105"></a> <span class='hs-conid'>Star</span> <span class='hs-varid'>f</span> <span class='hs-varop'>`mplus`</span> <span class='hs-conid'>Star</span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Star</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`mplus`</span> <span class='hs-varid'>g</span> <span class='hs-varid'>a</span>
<a name="line-106"></a>
<a name="line-107"></a><a name="instance%20Distributive%20(Star%20f%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Distributive</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Distributive</span> <span class='hs-layout'>(</span><span class='hs-conid'>Star</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-108"></a> <span class='hs-varid'>distribute</span> <span class='hs-varid'>fs</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Star</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>collect</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>$</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varop'>.#</span> <span class='hs-varid'>runStar</span><span class='hs-layout'>)</span> <span class='hs-varid'>fs</span>
<a name="line-109"></a>
<a name="line-110"></a><a name="instance%20Category%20(Star%20f)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Category</span> <span class='hs-layout'>(</span><span class='hs-conid'>Star</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-111"></a> <span class='hs-varid'>id</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Star</span> <span class='hs-varid'>return</span>
<a name="line-112"></a> <span class='hs-conid'>Star</span> <span class='hs-varid'>f</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Star</span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Star</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>g</span> <span class='hs-varid'>a</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>f</span>
<a name="line-113"></a>
<a name="line-114"></a><span class='hs-comment'>------------------------------------------------------------------------------</span>
<a name="line-115"></a><span class='hs-comment'>-- Costar</span>
<a name="line-116"></a><span class='hs-comment'>------------------------------------------------------------------------------</span>
<a name="line-117"></a>
<a name="line-118"></a><a name="Costar"></a><span class='hs-comment'>-- | Lift a 'Functor' into a 'Profunctor' (backwards).</span>
<a name="line-119"></a><a name="Costar"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Costar</span> <span class='hs-varid'>f</span> <span class='hs-varid'>d</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Costar</span> <span class='hs-layout'>{</span> <span class='hs-varid'>runCostar</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>f</span> <span class='hs-varid'>d</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>c</span> <span class='hs-layout'>}</span>
<a name="line-120"></a>
<a name="line-121"></a><a name="instance%20Profunctor%20(Costar%20f)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Profunctor</span> <span class='hs-layout'>(</span><span class='hs-conid'>Costar</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-122"></a> <span class='hs-varid'>dimap</span> <span class='hs-varid'>ab</span> <span class='hs-varid'>cd</span> <span class='hs-layout'>(</span><span class='hs-conid'>Costar</span> <span class='hs-varid'>fbc</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Costar</span> <span class='hs-layout'>(</span><span class='hs-varid'>cd</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fbc</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>ab</span><span class='hs-layout'>)</span>
<a name="line-123"></a> <span class='hs-comment'>{-# INLINE dimap #-}</span>
<a name="line-124"></a> <span class='hs-varid'>lmap</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Costar</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Costar</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span>
<a name="line-125"></a> <span class='hs-comment'>{-# INLINE lmap #-}</span>
<a name="line-126"></a> <span class='hs-varid'>rmap</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Costar</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Costar</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-varop'>.</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span>
<a name="line-127"></a> <span class='hs-comment'>{-# INLINE rmap #-}</span>
<a name="line-128"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ >= 708</span>
<a name="line-129"></a> <span class='hs-layout'>(</span> <span class='hs-cpp'>#.</span> <span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>coerce</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-varop'>.</span> <span class='hs-conid'>Coercible</span> <span class='hs-varid'>b</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span>
<a name="line-130"></a><span class='hs-cpp'>#else</span>
<a name="line-131"></a> <span class='hs-layout'>(</span> <span class='hs-cpp'>#.</span> <span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafeCoerce</span>
<a name="line-132"></a><span class='hs-cpp'>#endif</span>
<a name="line-133"></a> <span class='hs-comment'>{-# INLINE ( #. ) #-}</span>
<a name="line-134"></a> <span class='hs-comment'>-- We cannot overload ( .# ) because we didn't write the 'Functor'.</span>
<a name="line-135"></a>
<a name="line-136"></a><a name="instance%20Distributive%20(Costar%20f%20d)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Distributive</span> <span class='hs-layout'>(</span><span class='hs-conid'>Costar</span> <span class='hs-varid'>f</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-137"></a> <span class='hs-varid'>distribute</span> <span class='hs-varid'>fs</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Costar</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>gd</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>$</span> <span class='hs-varid'>gd</span><span class='hs-layout'>)</span> <span class='hs-varop'>.#</span> <span class='hs-varid'>runCostar</span><span class='hs-layout'>)</span> <span class='hs-varid'>fs</span>
<a name="line-138"></a>
<a name="line-139"></a><a name="instance%20Functor%20(Costar%20f%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-conid'>Costar</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-140"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Costar</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Costar</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-varop'>.</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span>
<a name="line-141"></a> <span class='hs-comment'>{-# INLINE fmap #-}</span>
<a name="line-142"></a> <span class='hs-varid'>a</span> <span class='hs-varop'><$</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Costar</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-143"></a> <span class='hs-comment'>{-# INLINE (<$) #-}</span>
<a name="line-144"></a>
<a name="line-145"></a><a name="instance%20Applicative%20(Costar%20f%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Applicative</span> <span class='hs-layout'>(</span><span class='hs-conid'>Costar</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-146"></a> <span class='hs-varid'>pure</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Costar</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-147"></a> <span class='hs-conid'>Costar</span> <span class='hs-varid'>ff</span> <span class='hs-varop'><*></span> <span class='hs-conid'>Costar</span> <span class='hs-varid'>fx</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Costar</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>ff</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-varid'>fx</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-148"></a> <span class='hs-keyword'>_</span> <span class='hs-varop'>*></span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>m</span>
<a name="line-149"></a> <span class='hs-varid'>m</span> <span class='hs-varop'><*</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>m</span>
<a name="line-150"></a>
<a name="line-151"></a><a name="instance%20Monad%20(Costar%20f%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Monad</span> <span class='hs-layout'>(</span><span class='hs-conid'>Costar</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-152"></a> <span class='hs-varid'>return</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pure</span>
<a name="line-153"></a> <span class='hs-conid'>Costar</span> <span class='hs-varid'>m</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Costar</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>runCostar</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>m</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span>
<a name="line-154"></a>
<a name="line-155"></a><span class='hs-comment'>------------------------------------------------------------------------------</span>
<a name="line-156"></a><span class='hs-comment'>-- Wrapped Profunctors</span>
<a name="line-157"></a><span class='hs-comment'>------------------------------------------------------------------------------</span>
<a name="line-158"></a>
<a name="line-159"></a><a name="WrappedArrow"></a><span class='hs-comment'>-- | Wrap an arrow for use as a 'Profunctor'.</span>
<a name="line-160"></a><a name="WrappedArrow"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>WrappedArrow</span> <span class='hs-varid'>p</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>WrapArrow</span> <span class='hs-layout'>{</span> <span class='hs-varid'>unwrapArrow</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>p</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-layout'>}</span>
<a name="line-161"></a>
<a name="line-162"></a><a name="instance%20Category%20(WrappedArrow%20p)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Category</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Category</span> <span class='hs-layout'>(</span><span class='hs-conid'>WrappedArrow</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-163"></a> <span class='hs-conid'>WrapArrow</span> <span class='hs-varid'>f</span> <span class='hs-varop'>.</span> <span class='hs-conid'>WrapArrow</span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>WrapArrow</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varop'>.</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span>
<a name="line-164"></a> <span class='hs-comment'>{-# INLINE (.) #-}</span>
<a name="line-165"></a> <span class='hs-varid'>id</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>WrapArrow</span> <span class='hs-varid'>id</span>
<a name="line-166"></a> <span class='hs-comment'>{-# INLINE id #-}</span>
<a name="line-167"></a>
<a name="line-168"></a><a name="instance%20Arrow%20(WrappedArrow%20p)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Arrow</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Arrow</span> <span class='hs-layout'>(</span><span class='hs-conid'>WrappedArrow</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-169"></a> <span class='hs-varid'>arr</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>WrapArrow</span> <span class='hs-varop'>.</span> <span class='hs-varid'>arr</span>
<a name="line-170"></a> <span class='hs-comment'>{-# INLINE arr #-}</span>
<a name="line-171"></a> <span class='hs-varid'>first</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>WrapArrow</span> <span class='hs-varop'>.</span> <span class='hs-varid'>first</span> <span class='hs-varop'>.</span> <span class='hs-varid'>unwrapArrow</span>
<a name="line-172"></a> <span class='hs-comment'>{-# INLINE first #-}</span>
<a name="line-173"></a> <span class='hs-varid'>second</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>WrapArrow</span> <span class='hs-varop'>.</span> <span class='hs-varid'>second</span> <span class='hs-varop'>.</span> <span class='hs-varid'>unwrapArrow</span>
<a name="line-174"></a> <span class='hs-comment'>{-# INLINE second #-}</span>
<a name="line-175"></a> <span class='hs-conid'>WrapArrow</span> <span class='hs-varid'>a</span> <span class='hs-varop'>***</span> <span class='hs-conid'>WrapArrow</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>WrapArrow</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varop'>***</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-176"></a> <span class='hs-comment'>{-# INLINE (***) #-}</span>
<a name="line-177"></a> <span class='hs-conid'>WrapArrow</span> <span class='hs-varid'>a</span> <span class='hs-varop'>&&&</span> <span class='hs-conid'>WrapArrow</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>WrapArrow</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varop'>&&&</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-178"></a> <span class='hs-comment'>{-# INLINE (&&&) #-}</span>
<a name="line-179"></a>
<a name="line-180"></a><a name="instance%20ArrowZero%20(WrappedArrow%20p)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>ArrowZero</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>ArrowZero</span> <span class='hs-layout'>(</span><span class='hs-conid'>WrappedArrow</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-181"></a> <span class='hs-varid'>zeroArrow</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>WrapArrow</span> <span class='hs-varid'>zeroArrow</span>
<a name="line-182"></a> <span class='hs-comment'>{-# INLINE zeroArrow #-}</span>
<a name="line-183"></a>
<a name="line-184"></a><a name="instance%20ArrowChoice%20(WrappedArrow%20p)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>ArrowChoice</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>ArrowChoice</span> <span class='hs-layout'>(</span><span class='hs-conid'>WrappedArrow</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-185"></a> <span class='hs-varid'>left</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>WrapArrow</span> <span class='hs-varop'>.</span> <span class='hs-varid'>left</span> <span class='hs-varop'>.</span> <span class='hs-varid'>unwrapArrow</span>
<a name="line-186"></a> <span class='hs-comment'>{-# INLINE left #-}</span>
<a name="line-187"></a> <span class='hs-varid'>right</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>WrapArrow</span> <span class='hs-varop'>.</span> <span class='hs-varid'>right</span> <span class='hs-varop'>.</span> <span class='hs-varid'>unwrapArrow</span>
<a name="line-188"></a> <span class='hs-comment'>{-# INLINE right #-}</span>
<a name="line-189"></a> <span class='hs-conid'>WrapArrow</span> <span class='hs-varid'>a</span> <span class='hs-varop'>+++</span> <span class='hs-conid'>WrapArrow</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>WrapArrow</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varop'>+++</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-190"></a> <span class='hs-comment'>{-# INLINE (+++) #-}</span>
<a name="line-191"></a> <span class='hs-conid'>WrapArrow</span> <span class='hs-varid'>a</span> <span class='hs-varop'>|||</span> <span class='hs-conid'>WrapArrow</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>WrapArrow</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varop'>|||</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-192"></a> <span class='hs-comment'>{-# INLINE (|||) #-}</span>
<a name="line-193"></a>
<a name="line-194"></a><a name="instance%20ArrowApply%20(WrappedArrow%20p)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>ArrowApply</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>ArrowApply</span> <span class='hs-layout'>(</span><span class='hs-conid'>WrappedArrow</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-195"></a> <span class='hs-varid'>app</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>WrapArrow</span> <span class='hs-varop'>$</span> <span class='hs-varid'>app</span> <span class='hs-varop'>.</span> <span class='hs-varid'>arr</span> <span class='hs-layout'>(</span><span class='hs-varid'>first</span> <span class='hs-varid'>unwrapArrow</span><span class='hs-layout'>)</span>
<a name="line-196"></a> <span class='hs-comment'>{-# INLINE app #-}</span>
<a name="line-197"></a>
<a name="line-198"></a><a name="instance%20ArrowLoop%20(WrappedArrow%20p)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>ArrowLoop</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>ArrowLoop</span> <span class='hs-layout'>(</span><span class='hs-conid'>WrappedArrow</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-199"></a> <span class='hs-varid'>loop</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>WrapArrow</span> <span class='hs-varop'>.</span> <span class='hs-varid'>loop</span> <span class='hs-varop'>.</span> <span class='hs-varid'>unwrapArrow</span>
<a name="line-200"></a> <span class='hs-comment'>{-# INLINE loop #-}</span>
<a name="line-201"></a>
<a name="line-202"></a><a name="instance%20Profunctor%20(WrappedArrow%20p)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Arrow</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Profunctor</span> <span class='hs-layout'>(</span><span class='hs-conid'>WrappedArrow</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-203"></a> <span class='hs-varid'>lmap</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varop'>^>></span><span class='hs-layout'>)</span>
<a name="line-204"></a> <span class='hs-comment'>{-# INLINE lmap #-}</span>
<a name="line-205"></a> <span class='hs-varid'>rmap</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varop'>^<<</span><span class='hs-layout'>)</span>
<a name="line-206"></a> <span class='hs-comment'>{-# INLINE rmap #-}</span>
<a name="line-207"></a> <span class='hs-comment'>-- We cannot safely overload ( #. ) or ( .# ) because we didn't write the 'Arrow'.</span>
<a name="line-208"></a>
<a name="line-209"></a><span class='hs-comment'>------------------------------------------------------------------------------</span>
<a name="line-210"></a><span class='hs-comment'>-- Forget</span>
<a name="line-211"></a><span class='hs-comment'>------------------------------------------------------------------------------</span>
<a name="line-212"></a>
<a name="line-213"></a><a name="Forget"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Forget</span> <span class='hs-varid'>r</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Forget</span> <span class='hs-layout'>{</span> <span class='hs-varid'>runForget</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>r</span> <span class='hs-layout'>}</span>
<a name="line-214"></a>
<a name="line-215"></a><a name="instance%20Profunctor%20(Forget%20r)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Profunctor</span> <span class='hs-layout'>(</span><span class='hs-conid'>Forget</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-216"></a> <span class='hs-varid'>dimap</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Forget</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Forget</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-varop'>.</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span>
<a name="line-217"></a> <span class='hs-comment'>{-# INLINE dimap #-}</span>
<a name="line-218"></a> <span class='hs-varid'>lmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Forget</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Forget</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-varop'>.</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span>
<a name="line-219"></a> <span class='hs-comment'>{-# INLINE lmap #-}</span>
<a name="line-220"></a> <span class='hs-varid'>rmap</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Forget</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Forget</span> <span class='hs-varid'>k</span>
<a name="line-221"></a> <span class='hs-comment'>{-# INLINE rmap #-}</span>
<a name="line-222"></a>
<a name="line-223"></a><a name="instance%20Functor%20(Forget%20r%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-conid'>Forget</span> <span class='hs-varid'>r</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-224"></a> <span class='hs-varid'>fmap</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Forget</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Forget</span> <span class='hs-varid'>k</span>
<a name="line-225"></a> <span class='hs-comment'>{-# INLINE fmap #-}</span>
<a name="line-226"></a>
<a name="line-227"></a><a name="instance%20Foldable%20(Forget%20r%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Foldable</span> <span class='hs-layout'>(</span><span class='hs-conid'>Forget</span> <span class='hs-varid'>r</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-228"></a> <span class='hs-varid'>foldMap</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mempty</span>
<a name="line-229"></a> <span class='hs-comment'>{-# INLINE foldMap #-}</span>
<a name="line-230"></a>
<a name="line-231"></a><a name="instance%20Traversable%20(Forget%20r%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Traversable</span> <span class='hs-layout'>(</span><span class='hs-conid'>Forget</span> <span class='hs-varid'>r</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-232"></a> <span class='hs-varid'>traverse</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Forget</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pure</span> <span class='hs-layout'>(</span><span class='hs-conid'>Forget</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span>
<a name="line-233"></a> <span class='hs-comment'>{-# INLINE traverse #-}</span>
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