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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 Rank2Types #-}</span>
<a name="line-3"></a><span class='hs-comment'>{-# LANGUAGE TypeOperators #-}</span>
<a name="line-4"></a><span class='hs-comment'>{-# LANGUAGE FlexibleContexts #-}</span>
<a name="line-5"></a><span class='hs-comment'>{-# LANGUAGE UndecidableInstances #-}</span>
<a name="line-6"></a>
<a name="line-7"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ >= 711</span>
<a name="line-8"></a><span class='hs-comment'>{-# OPTIONS_GHC -fno-warn-redundant-constraints #-}</span>
<a name="line-9"></a><span class='hs-cpp'>#endif</span>
<a name="line-10"></a>
<a name="line-11"></a><span class='hs-cpp'>#ifndef MIN_VERSION_base</span>
<a name="line-12"></a><span class='hs-cpp'>#define MIN_VERSION_base(x,y,z) 1</span>
<a name="line-13"></a><span class='hs-cpp'>#endif</span>
<a name="line-14"></a>
<a name="line-15"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-16"></a><span class='hs-comment'>-- |</span>
<a name="line-17"></a><span class='hs-comment'>-- Module : Generics.Deriving.Lens</span>
<a name="line-18"></a><span class='hs-comment'>-- Copyright : (C) 2012-15 Edward Kmett</span>
<a name="line-19"></a><span class='hs-comment'>-- License : BSD-style (see the file LICENSE)</span>
<a name="line-20"></a><span class='hs-comment'>-- Maintainer : Edward Kmett <ekmett@gmail.com></span>
<a name="line-21"></a><span class='hs-comment'>-- Stability : experimental</span>
<a name="line-22"></a><span class='hs-comment'>-- Portability : GHC</span>
<a name="line-23"></a><span class='hs-comment'>--</span>
<a name="line-24"></a><span class='hs-comment'>-- Note: @Generics.Deriving@ exports a number of names that collide with @Control.Lens@.</span>
<a name="line-25"></a><span class='hs-comment'>--</span>
<a name="line-26"></a><span class='hs-comment'>-- You can use hiding to mitigate this to an extent, and the following import</span>
<a name="line-27"></a><span class='hs-comment'>-- represents a fair compromise for user code:</span>
<a name="line-28"></a><span class='hs-comment'>--</span>
<a name="line-29"></a><span class='hs-comment'>-- > import Generics.Deriving hiding (from, to)</span>
<a name="line-30"></a><span class='hs-comment'>--</span>
<a name="line-31"></a><span class='hs-comment'>-- You can use 'generic' to replace 'Generics.Deriving.from' and</span>
<a name="line-32"></a><span class='hs-comment'>-- 'Generics.Deriving.to' from @Generics.Deriving@.</span>
<a name="line-33"></a><span class='hs-comment'>----------------------------------------------------------------------------</span>
<a name="line-34"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Generics</span><span class='hs-varop'>.</span><span class='hs-conid'>Deriving</span><span class='hs-varop'>.</span><span class='hs-conid'>Lens</span>
<a name="line-35"></a> <span class='hs-layout'>(</span>
<a name="line-36"></a> <span class='hs-comment'>-- * Isomorphisms for @GHC.Generics@</span>
<a name="line-37"></a> <span class='hs-varid'>generic</span>
<a name="line-38"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>generic1</span>
<a name="line-39"></a> <span class='hs-comment'>-- * Generic Traversal</span>
<a name="line-40"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>tinplate</span>
<a name="line-41"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>GTraversal</span>
<a name="line-42"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-43"></a>
<a name="line-44"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Lens</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'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromJust</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'>Typeable</span>
<a name="line-47"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Generics</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Generic</span>
<a name="line-48"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Generics</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-varid'>from</span><span class='hs-layout'>,</span> <span class='hs-varid'>to</span><span class='hs-layout'>)</span>
<a name="line-49"></a>
<a name="line-50"></a><span class='hs-cpp'>#if !MIN_VERSION_base(4,8,0)</span>
<a name="line-51"></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-52"></a><span class='hs-cpp'>#endif</span>
<a name="line-53"></a>
<a name="line-54"></a><span class='hs-comment'>-- $setup</span>
<a name="line-55"></a><span class='hs-comment'>-- >>> :set -XNoOverloadedStrings</span>
<a name="line-56"></a>
<a name="line-57"></a><a name="generic"></a><span class='hs-comment'>-- | Convert from the data type to its representation (or back)</span>
<a name="line-58"></a><span class='hs-comment'>--</span>
<a name="line-59"></a><span class='hs-comment'>-- >>> "hello"^.generic.from generic :: String</span>
<a name="line-60"></a><span class='hs-comment'>-- "hello"</span>
<a name="line-61"></a><span class='hs-definition'>generic</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Generic</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Iso'</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>Generic</span><span class='hs-varop'>.</span><span class='hs-conid'>Rep</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-62"></a><span class='hs-definition'>generic</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>iso</span> <span class='hs-conid'>Generic</span><span class='hs-varop'>.</span><span class='hs-varid'>from</span> <span class='hs-conid'>Generic</span><span class='hs-varop'>.</span><span class='hs-varid'>to</span>
<a name="line-63"></a><span class='hs-comment'>{-# INLINE generic #-}</span>
<a name="line-64"></a>
<a name="line-65"></a><a name="generic1"></a><span class='hs-comment'>-- | Convert from the data type to its representation (or back)</span>
<a name="line-66"></a><span class='hs-definition'>generic1</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Generic1</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Iso'</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-layout'>(</span><span class='hs-conid'>Rep1</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-67"></a><span class='hs-definition'>generic1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>iso</span> <span class='hs-varid'>from1</span> <span class='hs-varid'>to1</span>
<a name="line-68"></a><span class='hs-comment'>{-# INLINE generic1 #-}</span>
<a name="line-69"></a>
<a name="line-70"></a><a name="tinplate"></a><span class='hs-comment'>-- | A 'GHC.Generics.Generic' 'Traversal' that visits every occurrence</span>
<a name="line-71"></a><span class='hs-comment'>-- of something 'Typeable' anywhere in a container.</span>
<a name="line-72"></a><span class='hs-comment'>--</span>
<a name="line-73"></a><span class='hs-comment'>-- >>> allOf tinplate (=="Hello") (1::Int,2::Double,(),"Hello",["Hello"])</span>
<a name="line-74"></a><span class='hs-comment'>-- True</span>
<a name="line-75"></a><span class='hs-comment'>--</span>
<a name="line-76"></a><span class='hs-comment'>-- >>> mapMOf_ tinplate putStrLn ("hello",[(2 :: Int, "world!")])</span>
<a name="line-77"></a><span class='hs-comment'>-- hello</span>
<a name="line-78"></a><span class='hs-comment'>-- world!</span>
<a name="line-79"></a><span class='hs-definition'>tinplate</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Generic</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>GTraversal</span> <span class='hs-layout'>(</span><span class='hs-conid'>Generic</span><span class='hs-varop'>.</span><span class='hs-conid'>Rep</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>Typeable</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Traversal'</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span>
<a name="line-80"></a><span class='hs-definition'>tinplate</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>generic</span> <span class='hs-varop'>.</span> <span class='hs-varid'>tinplated</span> <span class='hs-conid'>Nothing</span>
<a name="line-81"></a><span class='hs-comment'>{-# INLINE tinplate #-}</span>
<a name="line-82"></a>
<a name="line-83"></a><a name="maybeArg1Of"></a><span class='hs-definition'>maybeArg1Of</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Maybe</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-varid'>c</span>
<a name="line-84"></a><span class='hs-definition'>maybeArg1Of</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>const</span>
<a name="line-85"></a><span class='hs-comment'>{-# INLINE maybeArg1Of #-}</span>
<a name="line-86"></a>
<a name="line-87"></a><a name="Maybe"></a><span class='hs-comment'>-- | Used to traverse 'Generic' data by 'uniplate'.</span>
<a name="line-88"></a><a name="Maybe"></a><span class='hs-keyword'>class</span> <span class='hs-conid'>GTraversal</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>where</span>
<a name="line-89"></a> <span class='hs-varid'>tinplated</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Typeable</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>TypeRep</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Traversal'</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'>b</span>
<a name="line-90"></a>
<a name="line-91"></a><a name="instance%20GTraversal%20(K1%20i%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Generic</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>GTraversal</span> <span class='hs-layout'>(</span><span class='hs-conid'>Generic</span><span class='hs-varop'>.</span><span class='hs-conid'>Rep</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>Typeable</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>GTraversal</span> <span class='hs-layout'>(</span><span class='hs-conid'>K1</span> <span class='hs-varid'>i</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'>tinplated</span> <span class='hs-varid'>prev</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>K1</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>cast</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`maybeArg1Of`</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>of</span>
<a name="line-93"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>K1</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fromJust</span> <span class='hs-varop'>.</span> <span class='hs-varid'>cast</span> <span class='hs-varop'><$></span> <span class='hs-varid'>f</span> <span class='hs-varid'>b</span>
<a name="line-94"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>prev</span> <span class='hs-keyword'>of</span>
<a name="line-95"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>rep</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>rep</span> <span class='hs-varop'>==</span> <span class='hs-varid'>typeOf</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>pure</span> <span class='hs-layout'>(</span><span class='hs-conid'>K1</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-96"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>K1</span> <span class='hs-varop'><$></span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>generic</span> <span class='hs-layout'>(</span><span class='hs-varid'>tinplated</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>typeOf</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span>
<a name="line-97"></a> <span class='hs-comment'>{-# INLINE tinplated #-}</span>
<a name="line-98"></a>
<a name="line-99"></a><a name="instance%20GTraversal%20U1"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>GTraversal</span> <span class='hs-conid'>U1</span> <span class='hs-keyword'>where</span>
<a name="line-100"></a> <span class='hs-varid'>tinplated</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>U1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pure</span> <span class='hs-conid'>U1</span>
<a name="line-101"></a> <span class='hs-comment'>{-# INLINE tinplated #-}</span>
<a name="line-102"></a>
<a name="line-103"></a><a name="instance%20GTraversal%20V1"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>GTraversal</span> <span class='hs-conid'>V1</span> <span class='hs-keyword'>where</span>
<a name="line-104"></a> <span class='hs-varid'>tinplated</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>v</span> <span class='hs-varop'>`seq`</span> <span class='hs-varid'>undefined</span>
<a name="line-105"></a> <span class='hs-comment'>{-# INLINE tinplated #-}</span>
<a name="line-106"></a>
<a name="line-107"></a><a name="instance%20GTraversal%20(f%20:*:%20g)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>GTraversal</span> <span class='hs-varid'>f</span><span class='hs-layout'>,</span> <span class='hs-conid'>GTraversal</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>GTraversal</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-conop'>:*:</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-108"></a> <span class='hs-varid'>tinplated</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-conop'>:*:</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</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'>tinplated</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-varop'><*></span> <span class='hs-varid'>tinplated</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>f</span> <span class='hs-varid'>y</span>
<a name="line-109"></a> <span class='hs-comment'>{-# INLINE tinplated #-}</span>
<a name="line-110"></a>
<a name="line-111"></a><a name="instance%20GTraversal%20(f%20:+:%20g)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>GTraversal</span> <span class='hs-varid'>f</span><span class='hs-layout'>,</span> <span class='hs-conid'>GTraversal</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>GTraversal</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-conop'>:+:</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-112"></a> <span class='hs-varid'>tinplated</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>L1</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>L1</span> <span class='hs-varop'><$></span> <span class='hs-varid'>tinplated</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span>
<a name="line-113"></a> <span class='hs-varid'>tinplated</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>R1</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>R1</span> <span class='hs-varop'><$></span> <span class='hs-varid'>tinplated</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span>
<a name="line-114"></a> <span class='hs-comment'>{-# INLINE tinplated #-}</span>
<a name="line-115"></a>
<a name="line-116"></a><a name="instance%20GTraversal%20(M1%20i%20c%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>GTraversal</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>GTraversal</span> <span class='hs-layout'>(</span><span class='hs-conid'>M1</span> <span class='hs-varid'>i</span> <span class='hs-varid'>c</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-117"></a> <span class='hs-varid'>tinplated</span> <span class='hs-varid'>prev</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>M1</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>M1</span> <span class='hs-varop'><$></span> <span class='hs-varid'>tinplated</span> <span class='hs-varid'>prev</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span>
<a name="line-118"></a> <span class='hs-comment'>{-# INLINE tinplated #-}</span>
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