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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE CPP, GeneralizedNewtypeDeriving #-}</span>
<a name="line-2"></a><span class='hs-comment'>----------------------------------------------------------------------------</span>
<a name="line-3"></a><span class='hs-comment'>-- |</span>
<a name="line-4"></a><span class='hs-comment'>-- Module : Data.Proxy</span>
<a name="line-5"></a><span class='hs-comment'>-- Copyright : 2009-2011 Edward Kmett</span>
<a name="line-6"></a><span class='hs-comment'>-- License : BSD3</span>
<a name="line-7"></a><span class='hs-comment'>--</span>
<a name="line-8"></a><span class='hs-comment'>-- Maintainer : Edward Kmett <ekmett@gmail.com></span>
<a name="line-9"></a><span class='hs-comment'>-- Stability : experimental</span>
<a name="line-10"></a><span class='hs-comment'>-- Portability : generalized newtype deriving</span>
<a name="line-11"></a><span class='hs-comment'>--</span>
<a name="line-12"></a><span class='hs-comment'>-------------------------------------------------------------------------------</span>
<a name="line-13"></a>
<a name="line-14"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Proxy</span>
<a name="line-15"></a> <span class='hs-layout'>(</span>
<a name="line-16"></a> <span class='hs-comment'>-- * Tagged values</span>
<a name="line-17"></a> <span class='hs-conid'>Proxy</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-18"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>reproxy</span>
<a name="line-19"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>asProxyTypeOf</span>
<a name="line-20"></a> <span class='hs-comment'>-- * Conversion</span>
<a name="line-21"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>proxy</span>
<a name="line-22"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>unproxy</span>
<a name="line-23"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-24"></a>
<a name="line-25"></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-layout'>(</span><span class='hs-conid'>Applicative</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'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Traversable</span> <span class='hs-layout'>(</span><span class='hs-conid'>Traversable</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</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'>Foldable</span> <span class='hs-layout'>(</span><span class='hs-conid'>Foldable</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</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'>Default</span> <span class='hs-layout'>(</span><span class='hs-conid'>Default</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</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'>Data</span> <span class='hs-layout'>(</span><span class='hs-conid'>Data</span><span class='hs-layout'>,</span><span class='hs-conid'>Typeable</span><span class='hs-layout'>)</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'>Ix</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ix</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-31"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Tagged</span>
<a name="line-32"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Semigroup</span>
<a name="line-33"></a><span class='hs-cpp'>#ifdef __GLASGOW_HASKELL__</span>
<a name="line-34"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Arr</span> <span class='hs-layout'>(</span><span class='hs-varid'>unsafeIndex</span><span class='hs-layout'>,</span> <span class='hs-varid'>unsafeRangeSize</span><span class='hs-layout'>)</span>
<a name="line-35"></a><span class='hs-cpp'>#endif</span>
<a name="line-36"></a>
<a name="line-37"></a><a name="Proxy"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Proxy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Proxy</span> <span class='hs-keyword'>deriving</span>
<a name="line-38"></a> <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> <span class='hs-conid'>Show</span><span class='hs-layout'>,</span> <span class='hs-conid'>Read</span>
<a name="line-39"></a><span class='hs-cpp'>#ifdef LANGUAGE_DeriveDataTypeable</span>
<a name="line-40"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Data</span><span class='hs-layout'>,</span><span class='hs-conid'>Typeable</span>
<a name="line-41"></a><span class='hs-cpp'>#endif</span>
<a name="line-42"></a> <span class='hs-layout'>)</span>
<a name="line-43"></a>
<a name="line-44"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Enum</span> <span class='hs-layout'>(</span><span class='hs-conid'>Proxy</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-45"></a> <span class='hs-varid'>succ</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-str'>"Proxy.succ"</span>
<a name="line-46"></a> <span class='hs-varid'>pred</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-str'>"Proxy.pred"</span>
<a name="line-47"></a> <span class='hs-varid'>fromEnum</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span>
<a name="line-48"></a> <span class='hs-varid'>toEnum</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Proxy</span>
<a name="line-49"></a> <span class='hs-varid'>toEnum</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-str'>"Proxy.toEnum: 0 expected"</span>
<a name="line-50"></a> <span class='hs-varid'>enumFrom</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Proxy</span><span class='hs-keyglyph'>]</span>
<a name="line-51"></a> <span class='hs-varid'>enumFromThen</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Proxy</span><span class='hs-keyglyph'>]</span>
<a name="line-52"></a> <span class='hs-varid'>enumFromThenTo</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Proxy</span><span class='hs-keyglyph'>]</span>
<a name="line-53"></a> <span class='hs-varid'>enumFromTo</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Proxy</span><span class='hs-keyglyph'>]</span>
<a name="line-54"></a>
<a name="line-55"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Semigroup</span> <span class='hs-layout'>(</span><span class='hs-conid'>Proxy</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-56"></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'>Proxy</span>
<a name="line-57"></a>
<a name="line-58"></a><span class='hs-comment'>{-
<a name="line-59"></a>Work around for the following GHC bug with deriving Ix instances with a phantom type:
<a name="line-60"></a>
<a name="line-61"></a>Data/Tagged.hs:1:0:
<a name="line-62"></a> Expecting an ordinary type, but found a type of kind * -> *
<a name="line-63"></a> In an expression type signature: Proxy
<a name="line-64"></a> In the expression: ghc-prim:GHC.Prim.tagToEnum# a :: Proxy
<a name="line-65"></a> In the definition of `Data.Tagged.$tag2con_Proxy':
<a name="line-66"></a> Data.Tagged.$tag2con_Proxy (ghc-prim:GHC.Types.I# a)
<a name="line-67"></a> = ghc-prim:GHC.Prim.tagToEnum# a :: Proxy
<a name="line-68"></a>
<a name="line-69"></a>-}</span>
<a name="line-70"></a>
<a name="line-71"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Ix</span> <span class='hs-layout'>(</span><span class='hs-conid'>Proxy</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-72"></a> <span class='hs-varid'>range</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Proxy</span><span class='hs-keyglyph'>]</span>
<a name="line-73"></a> <span class='hs-varid'>index</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span>
<a name="line-74"></a> <span class='hs-varid'>inRange</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-75"></a> <span class='hs-varid'>rangeSize</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>1</span>
<a name="line-76"></a><span class='hs-cpp'>#ifdef __GLASGOW_HASKELL__</span>
<a name="line-77"></a> <span class='hs-varid'>unsafeIndex</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span>
<a name="line-78"></a> <span class='hs-varid'>unsafeRangeSize</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>1</span>
<a name="line-79"></a><span class='hs-cpp'>#endif</span>
<a name="line-80"></a>
<a name="line-81"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Bounded</span> <span class='hs-layout'>(</span><span class='hs-conid'>Proxy</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-82"></a> <span class='hs-varid'>minBound</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Proxy</span>
<a name="line-83"></a> <span class='hs-varid'>maxBound</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Proxy</span>
<a name="line-84"></a>
<a name="line-85"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-conid'>Proxy</span> <span class='hs-keyword'>where</span>
<a name="line-86"></a> <span class='hs-varid'>fmap</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Proxy</span>
<a name="line-87"></a> <span class='hs-comment'>{-# INLINE fmap #-}</span>
<a name="line-88"></a>
<a name="line-89"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Applicative</span> <span class='hs-conid'>Proxy</span> <span class='hs-keyword'>where</span>
<a name="line-90"></a> <span class='hs-varid'>pure</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Proxy</span>
<a name="line-91"></a> <span class='hs-comment'>{-# INLINE pure #-}</span>
<a name="line-92"></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'>Proxy</span>
<a name="line-93"></a> <span class='hs-comment'>{-# INLINE (<*>) #-}</span>
<a name="line-94"></a>
<a name="line-95"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Monoid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Proxy</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-96"></a> <span class='hs-varid'>mempty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Proxy</span>
<a name="line-97"></a> <span class='hs-comment'>{-# INLINE mempty #-}</span>
<a name="line-98"></a> <span class='hs-varid'>mappend</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Proxy</span>
<a name="line-99"></a> <span class='hs-comment'>{-# INLINE mappend #-}</span>
<a name="line-100"></a> <span class='hs-varid'>mconcat</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Proxy</span>
<a name="line-101"></a> <span class='hs-comment'>{-# INLINE mconcat #-}</span>
<a name="line-102"></a>
<a name="line-103"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Monad</span> <span class='hs-conid'>Proxy</span> <span class='hs-keyword'>where</span>
<a name="line-104"></a> <span class='hs-varid'>return</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Proxy</span>
<a name="line-105"></a> <span class='hs-comment'>{-# INLINE return #-}</span>
<a name="line-106"></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'>Proxy</span>
<a name="line-107"></a> <span class='hs-comment'>{-# INLINE (>>=) #-}</span>
<a name="line-108"></a>
<a name="line-109"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Foldable</span> <span class='hs-conid'>Proxy</span> <span class='hs-keyword'>where</span>
<a name="line-110"></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-111"></a> <span class='hs-comment'>{-# INLINE foldMap #-}</span>
<a name="line-112"></a> <span class='hs-varid'>fold</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mempty</span>
<a name="line-113"></a> <span class='hs-comment'>{-# INLINE fold #-}</span>
<a name="line-114"></a> <span class='hs-varid'>foldr</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>z</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>z</span>
<a name="line-115"></a> <span class='hs-comment'>{-# INLINE foldr #-}</span>
<a name="line-116"></a> <span class='hs-varid'>foldl</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>z</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>z</span>
<a name="line-117"></a> <span class='hs-comment'>{-# INLINE foldl #-}</span>
<a name="line-118"></a> <span class='hs-varid'>foldl1</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-str'>"foldl1: Proxy"</span>
<a name="line-119"></a> <span class='hs-comment'>{-# INLINE foldl1 #-}</span>
<a name="line-120"></a> <span class='hs-varid'>foldr1</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-str'>"foldr1: Proxy"</span>
<a name="line-121"></a> <span class='hs-comment'>{-# INLINE foldr1 #-}</span>
<a name="line-122"></a>
<a name="line-123"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Traversable</span> <span class='hs-conid'>Proxy</span> <span class='hs-keyword'>where</span>
<a name="line-124"></a> <span class='hs-varid'>traverse</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pure</span> <span class='hs-conid'>Proxy</span>
<a name="line-125"></a> <span class='hs-comment'>{-# INLINE traverse #-}</span>
<a name="line-126"></a> <span class='hs-varid'>sequenceA</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pure</span> <span class='hs-conid'>Proxy</span>
<a name="line-127"></a> <span class='hs-comment'>{-# INLINE sequenceA #-}</span>
<a name="line-128"></a> <span class='hs-varid'>mapM</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Proxy</span>
<a name="line-129"></a> <span class='hs-comment'>{-# INLINE mapM #-}</span>
<a name="line-130"></a> <span class='hs-varid'>sequence</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Proxy</span>
<a name="line-131"></a> <span class='hs-comment'>{-# INLINE sequence #-}</span>
<a name="line-132"></a>
<a name="line-133"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Default</span> <span class='hs-layout'>(</span><span class='hs-conid'>Proxy</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-134"></a> <span class='hs-varid'>def</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Proxy</span>
<a name="line-135"></a> <span class='hs-comment'>{-# INLINE def #-}</span>
<a name="line-136"></a>
<a name="line-137"></a><a name="reproxy"></a><span class='hs-comment'>-- | Some times you need to change the proxy you have lying around.</span>
<a name="line-138"></a><span class='hs-comment'>-- Idiomatic usage is to make a new combinator for the relationship </span>
<a name="line-139"></a><span class='hs-comment'>-- between the proxies that you want to enforce, and define that </span>
<a name="line-140"></a><span class='hs-comment'>-- combinator using 'reproxy'.</span>
<a name="line-141"></a><span class='hs-comment'>--</span>
<a name="line-142"></a><span class='hs-comment'>-- > data Succ n</span>
<a name="line-143"></a><span class='hs-comment'>-- > reproxySucc :: Proxy n -> Proxy (Succ n)</span>
<a name="line-144"></a><span class='hs-comment'>-- > reproxySucc = reproxy</span>
<a name="line-145"></a><span class='hs-definition'>reproxy</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Proxy</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Proxy</span> <span class='hs-varid'>t</span>
<a name="line-146"></a><span class='hs-definition'>reproxy</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Proxy</span>
<a name="line-147"></a><span class='hs-comment'>{-# INLINE reproxy #-}</span>
<a name="line-148"></a>
<a name="line-149"></a><a name="proxy"></a><span class='hs-comment'>-- | Convert from a 'Tagged' representation to a representation </span>
<a name="line-150"></a><span class='hs-comment'>-- based on a 'Proxy'.</span>
<a name="line-151"></a><span class='hs-definition'>proxy</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Tagged</span> <span class='hs-varid'>s</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Proxy</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-152"></a><span class='hs-definition'>proxy</span> <span class='hs-layout'>(</span><span class='hs-conid'>Tagged</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span>
<a name="line-153"></a><span class='hs-comment'>{-# INLINE proxy #-}</span>
<a name="line-154"></a>
<a name="line-155"></a><a name="unproxy"></a><span class='hs-comment'>-- | Convert from a representation based on a 'Proxy' to a 'Tagged' </span>
<a name="line-156"></a><span class='hs-comment'>-- representation.</span>
<a name="line-157"></a><span class='hs-definition'>unproxy</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Proxy</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Tagged</span> <span class='hs-varid'>s</span> <span class='hs-varid'>a</span>
<a name="line-158"></a><span class='hs-definition'>unproxy</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Tagged</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-conid'>Proxy</span><span class='hs-layout'>)</span>
<a name="line-159"></a><span class='hs-comment'>{-# INLINE unproxy #-}</span>
<a name="line-160"></a>
<a name="line-161"></a><a name="asProxyTypeOf"></a><span class='hs-comment'>-- | 'asProxyTypeOf' is a type-restricted version of 'const'. </span>
<a name="line-162"></a><span class='hs-comment'>-- It is usually used as an infix operator, and its typing forces its first </span>
<a name="line-163"></a><span class='hs-comment'>-- argument (which is usually overloaded) to have the same type as the tag </span>
<a name="line-164"></a><span class='hs-comment'>-- of the second.</span>
<a name="line-165"></a><span class='hs-definition'>asProxyTypeOf</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Proxy</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-166"></a><span class='hs-definition'>asProxyTypeOf</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>const</span>
<a name="line-167"></a><span class='hs-comment'>{-# INLINE asProxyTypeOf #-}</span>
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