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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE CPP #-}</span>
<a name="line-2"></a>
<a name="line-3"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ < 708</span>
<a name="line-4"></a><span class='hs-comment'>{-# LANGUAGE Trustworthy #-}</span>
<a name="line-5"></a><span class='hs-cpp'>#endif</span>
<a name="line-6"></a>
<a name="line-7"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-8"></a><span class='hs-comment'>-- |</span>
<a name="line-9"></a><span class='hs-comment'>-- Module : Control.Lens.Internal.Setter</span>
<a name="line-10"></a><span class='hs-comment'>-- Copyright : (C) 2012-2016 Edward Kmett</span>
<a name="line-11"></a><span class='hs-comment'>-- License : BSD-style (see the file LICENSE)</span>
<a name="line-12"></a><span class='hs-comment'>-- Maintainer : Edward Kmett <ekmett@gmail.com></span>
<a name="line-13"></a><span class='hs-comment'>-- Stability : provisional</span>
<a name="line-14"></a><span class='hs-comment'>-- Portability : non-portable</span>
<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-keyword'>module</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Lens</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span><span class='hs-varop'>.</span><span class='hs-conid'>Setter</span>
<a name="line-18"></a> <span class='hs-layout'>(</span>
<a name="line-19"></a> <span class='hs-comment'>-- ** Setters</span>
<a name="line-20"></a> <span class='hs-conid'>Settable</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-21"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-22"></a>
<a name="line-23"></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-24"></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-varop'>.</span><span class='hs-conid'>Backwards</span>
<a name="line-25"></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-26"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Functor</span><span class='hs-varop'>.</span><span class='hs-conid'>Compose</span>
<a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Functor</span><span class='hs-varop'>.</span><span class='hs-conid'>Identity</span>
<a name="line-28"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Profunctor</span>
<a name="line-29"></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-30"></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-31"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Prelude</span>
<a name="line-32"></a>
<a name="line-33"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-34"></a><span class='hs-comment'>-- Settable</span>
<a name="line-35"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-36"></a>
<a name="line-37"></a><a name="Settable"></a><span class='hs-comment'>-- | Anything 'Settable' must be isomorphic to the 'Identity' 'Functor'.</span>
<a name="line-38"></a><a name="Settable"></a><span class='hs-keyword'>class</span> <span class='hs-layout'>(</span><span class='hs-conid'>Applicative</span> <span class='hs-varid'>f</span><span class='hs-layout'>,</span> <span class='hs-conid'>Distributive</span> <span class='hs-varid'>f</span><span class='hs-layout'>,</span> <span class='hs-conid'>Traversable</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Settable</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>where</span>
<a name="line-39"></a> <span class='hs-varid'>untainted</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-40"></a>
<a name="line-41"></a> <span class='hs-varid'>untaintedDot</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Profunctor</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>p</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>p</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span>
<a name="line-42"></a> <span class='hs-varid'>untaintedDot</span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>g</span> <span class='hs-varop'>`seq`</span> <span class='hs-varid'>rmap</span> <span class='hs-varid'>untainted</span> <span class='hs-varid'>g</span>
<a name="line-43"></a> <span class='hs-comment'>{-# INLINE untaintedDot #-}</span>
<a name="line-44"></a>
<a name="line-45"></a> <span class='hs-varid'>taintedDot</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Profunctor</span> <span class='hs-varid'>p</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-keyglyph'>-></span> <span class='hs-varid'>p</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-46"></a> <span class='hs-varid'>taintedDot</span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>g</span> <span class='hs-varop'>`seq`</span> <span class='hs-varid'>rmap</span> <span class='hs-varid'>pure</span> <span class='hs-varid'>g</span>
<a name="line-47"></a> <span class='hs-comment'>{-# INLINE taintedDot #-}</span>
<a name="line-48"></a>
<a name="line-49"></a><a name="instance%20Settable%20Identity"></a><span class='hs-comment'>-- | So you can pass our 'Control.Lens.Setter.Setter' into combinators from other lens libraries.</span>
<a name="line-50"></a><a name="instance%20Settable%20Identity"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Settable</span> <span class='hs-conid'>Identity</span> <span class='hs-keyword'>where</span>
<a name="line-51"></a> <span class='hs-varid'>untainted</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>runIdentity</span>
<a name="line-52"></a> <span class='hs-comment'>{-# INLINE untainted #-}</span>
<a name="line-53"></a> <span class='hs-varid'>untaintedDot</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>runIdentity</span> <span class='hs-cpp'>#.</span><span class='hs-layout'>)</span>
<a name="line-54"></a> <span class='hs-comment'>{-# INLINE untaintedDot #-}</span>
<a name="line-55"></a> <span class='hs-varid'>taintedDot</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>Identity</span> <span class='hs-cpp'>#.</span><span class='hs-layout'>)</span>
<a name="line-56"></a> <span class='hs-comment'>{-# INLINE taintedDot #-}</span>
<a name="line-57"></a>
<a name="line-58"></a><a name="instance%20Settable%20(Backwards%20f)"></a><span class='hs-comment'>-- | 'Control.Lens.Fold.backwards'</span>
<a name="line-59"></a><a name="instance%20Settable%20(Backwards%20f)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Settable</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Settable</span> <span class='hs-layout'>(</span><span class='hs-conid'>Backwards</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-60"></a> <span class='hs-varid'>untainted</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>untaintedDot</span> <span class='hs-varid'>forwards</span>
<a name="line-61"></a> <span class='hs-comment'>{-# INLINE untainted #-}</span>
<a name="line-62"></a>
<a name="line-63"></a><a name="instance%20Settable%20(Compose%20f%20g)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Settable</span> <span class='hs-varid'>f</span><span class='hs-layout'>,</span> <span class='hs-conid'>Settable</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Settable</span> <span class='hs-layout'>(</span><span class='hs-conid'>Compose</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-64"></a> <span class='hs-varid'>untainted</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>untaintedDot</span> <span class='hs-layout'>(</span><span class='hs-varid'>untaintedDot</span> <span class='hs-varid'>getCompose</span><span class='hs-layout'>)</span>
<a name="line-65"></a> <span class='hs-comment'>{-# INLINE untainted #-}</span>
<a name="line-66"></a>
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