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<pre><a name="line-1"></a><span class='hs-comment'>{-
<a name="line-2"></a> Suggest removal of unnecessary extensions
<a name="line-3"></a> i.e. They have {-# LANGUAGE RecursiveDo #-} but no mdo keywords
<a name="line-4"></a><TEST>
<a name="line-5"></a>{-# LANGUAGE Arrows #-} \
<a name="line-6"></a>f = id --
<a name="line-7"></a>{-# LANGUAGE Foo, Generics, ParallelListComp, ImplicitParams #-} \
<a name="line-8"></a>f = [(a,c) | a <- b | c <- d] -- {-# LANGUAGE Foo, ParallelListComp #-}
<a name="line-9"></a>{-# LANGUAGE EmptyDataDecls #-} \
<a name="line-10"></a>data Foo
<a name="line-11"></a>{-# LANGUAGE TemplateHaskell #-} \
<a name="line-12"></a>$(deriveNewtypes typeInfo)
<a name="line-13"></a>{-# LANGUAGE TemplateHaskell #-} \
<a name="line-14"></a>main = foo ''Bar
<a name="line-15"></a>{-# LANGUAGE PatternGuards #-} \
<a name="line-16"></a>test = case x of _ | y <- z -> w
<a name="line-17"></a>{-# LANGUAGE TemplateHaskell,EmptyDataDecls #-} \
<a name="line-18"></a>$(fmap return $ dataD (return []) (mkName "Void") [] [] [])
<a name="line-19"></a>{-# LANGUAGE RecursiveDo #-} \
<a name="line-20"></a>main = mdo x <- y; return y
<a name="line-21"></a>{-# LANGUAGE ImplicitParams, BangPatterns #-} \
<a name="line-22"></a>sort :: (?cmp :: a -> a -> Bool) => [a] -> [a] \
<a name="line-23"></a>sort !f = undefined
<a name="line-24"></a>{-# LANGUAGE KindSignatures #-} \
<a name="line-25"></a>data Set (cxt :: * -> *) a = Set [a]
<a name="line-26"></a>{-# LANGUAGE RecordWildCards #-} \
<a name="line-27"></a>record field = Record{..}
<a name="line-28"></a>{-# LANGUAGE RecordWildCards #-} \
<a name="line-29"></a>record = 1 -- {-# LANGUAGE DisambiguateRecordFields #-}
<a name="line-30"></a></TEST>
<a name="line-31"></a>-}</span>
<a name="line-32"></a>
<a name="line-33"></a>
<a name="line-34"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Hint</span><span class='hs-varop'>.</span><span class='hs-conid'>Extensions</span> <span class='hs-keyword'>where</span>
<a name="line-35"></a>
<a name="line-36"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Hint</span><span class='hs-varop'>.</span><span class='hs-conid'>Type</span>
<a name="line-37"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Maybe</span>
<a name="line-38"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span>
<a name="line-39"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Util</span>
<a name="line-40"></a>
<a name="line-41"></a>
<a name="line-42"></a><a name="extensionsHint"></a><span class='hs-definition'>extensionsHint</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModuHint</span>
<a name="line-43"></a><span class='hs-definition'>extensionsHint</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>rawIdea</span> <span class='hs-conid'>Error</span> <span class='hs-str'>"Unused LANGUAGE pragma"</span> <span class='hs-layout'>(</span><span class='hs-varid'>toSrcLoc</span> <span class='hs-varid'>sl</span><span class='hs-layout'>)</span>
<a name="line-44"></a> <span class='hs-layout'>(</span><span class='hs-varid'>prettyPrint</span> <span class='hs-varid'>o</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-varid'>new</span> <span class='hs-keyword'>then</span> <span class='hs-str'>""</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>prettyPrint</span> <span class='hs-varop'>$</span> <span class='hs-conid'>LanguagePragma</span> <span class='hs-varid'>sl</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>toNamed</span> <span class='hs-varop'>.</span> <span class='hs-varid'>showExt</span><span class='hs-layout'>)</span> <span class='hs-varid'>new</span><span class='hs-layout'>)</span>
<a name="line-45"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>not</span> <span class='hs-varop'>$</span> <span class='hs-varid'>used</span> <span class='hs-conid'>TemplateHaskell</span> <span class='hs-varid'>x</span> <span class='hs-comment'>-- if TH is on, can use all other extensions programmatically</span>
<a name="line-46"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>o</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>LanguagePragma</span> <span class='hs-varid'>sl</span> <span class='hs-varid'>exts</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>modulePragmas</span> <span class='hs-varid'>x</span>
<a name="line-47"></a> <span class='hs-layout'>,</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>old</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>classifyExtension</span> <span class='hs-varop'>.</span> <span class='hs-varid'>prettyPrint</span><span class='hs-layout'>)</span> <span class='hs-varid'>exts</span>
<a name="line-48"></a> <span class='hs-layout'>,</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>new</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>minimalExtensions</span> <span class='hs-varid'>x</span> <span class='hs-varid'>old</span>
<a name="line-49"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>sort</span> <span class='hs-varid'>new</span> <span class='hs-varop'>/=</span> <span class='hs-varid'>sort</span> <span class='hs-varid'>old</span><span class='hs-keyglyph'>]</span>
<a name="line-50"></a> <span class='hs-keyword'>where</span>
<a name="line-51"></a> <span class='hs-varid'>showExt</span> <span class='hs-layout'>(</span><span class='hs-conid'>UnknownExtension</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span>
<a name="line-52"></a> <span class='hs-varid'>showExt</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>show</span> <span class='hs-varid'>x</span>
<a name="line-53"></a>
<a name="line-54"></a>
<a name="line-55"></a><a name="minimalExtensions"></a><span class='hs-definition'>minimalExtensions</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Module_</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Extension</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Extension</span><span class='hs-keyglyph'>]</span>
<a name="line-56"></a><span class='hs-definition'>minimalExtensions</span> <span class='hs-varid'>x</span> <span class='hs-varid'>es</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>nub</span> <span class='hs-varop'>$</span> <span class='hs-varid'>concatMap</span> <span class='hs-varid'>f</span> <span class='hs-varid'>es</span>
<a name="line-57"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>f</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>used</span> <span class='hs-varid'>e</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>then</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>e</span><span class='hs-keyglyph'>]</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>concatMap</span> <span class='hs-varid'>f</span> <span class='hs-varop'>$</span> <span class='hs-varid'>implies</span> <span class='hs-varid'>e</span>
<a name="line-58"></a>
<a name="line-59"></a>
<a name="line-60"></a><a name="implies"></a><span class='hs-comment'>-- sometimes one extension implies others, this captures that</span>
<a name="line-61"></a><span class='hs-definition'>implies</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Extension</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Extension</span><span class='hs-keyglyph'>]</span>
<a name="line-62"></a><span class='hs-definition'>implies</span> <span class='hs-conid'>RecordWildCards</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>DisambiguateRecordFields</span><span class='hs-keyglyph'>]</span>
<a name="line-63"></a><span class='hs-definition'>implies</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-64"></a>
<a name="line-65"></a><a name="used"></a><span class='hs-definition'>used</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Extension</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Module_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-66"></a><span class='hs-definition'>used</span> <span class='hs-conid'>RecursiveDo</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasS</span> <span class='hs-varid'>isMDo</span>
<a name="line-67"></a><span class='hs-definition'>used</span> <span class='hs-conid'>ParallelListComp</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasS</span> <span class='hs-varid'>isParComp</span>
<a name="line-68"></a><span class='hs-definition'>used</span> <span class='hs-conid'>FunctionalDependencies</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasT</span> <span class='hs-layout'>(</span><span class='hs-varid'>un</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FunDep</span> <span class='hs-conid'>S</span><span class='hs-layout'>)</span>
<a name="line-69"></a><span class='hs-definition'>used</span> <span class='hs-conid'>ImplicitParams</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasT</span> <span class='hs-layout'>(</span><span class='hs-varid'>un</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IPName</span> <span class='hs-conid'>S</span><span class='hs-layout'>)</span>
<a name="line-70"></a><span class='hs-definition'>used</span> <span class='hs-conid'>EmptyDataDecls</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasS</span> <span class='hs-varid'>f</span>
<a name="line-71"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>DataDecl</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-72"></a> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>GDataDecl</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-73"></a> <span class='hs-varid'>f</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-74"></a><span class='hs-definition'>used</span> <span class='hs-conid'>KindSignatures</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasT</span> <span class='hs-layout'>(</span><span class='hs-varid'>un</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Kind</span> <span class='hs-conid'>S</span><span class='hs-layout'>)</span>
<a name="line-75"></a><span class='hs-definition'>used</span> <span class='hs-conid'>BangPatterns</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasS</span> <span class='hs-varid'>isPBangPat</span>
<a name="line-76"></a><span class='hs-definition'>used</span> <span class='hs-conid'>TemplateHaskell</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasT2</span> <span class='hs-layout'>(</span><span class='hs-varid'>un</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Bracket</span> <span class='hs-conid'>S</span><span class='hs-layout'>,</span> <span class='hs-conid'>Splice</span> <span class='hs-conid'>S</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>&</span> <span class='hs-varid'>hasS</span> <span class='hs-varid'>f</span>
<a name="line-77"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>f</span> <span class='hs-conid'>VarQuote</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-78"></a> <span class='hs-varid'>f</span> <span class='hs-conid'>TypQuote</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-79"></a> <span class='hs-varid'>f</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-80"></a><span class='hs-definition'>used</span> <span class='hs-conid'>ForeignFunctionInterface</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasT</span> <span class='hs-layout'>(</span><span class='hs-varid'>un</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CallConv</span> <span class='hs-conid'>S</span><span class='hs-layout'>)</span>
<a name="line-81"></a><span class='hs-definition'>used</span> <span class='hs-conid'>Generics</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasS</span> <span class='hs-varid'>isPExplTypeArg</span>
<a name="line-82"></a><span class='hs-definition'>used</span> <span class='hs-conid'>PatternGuards</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasS</span> <span class='hs-varid'>f1</span> <span class='hs-varop'>&</span> <span class='hs-varid'>hasS</span> <span class='hs-varid'>f2</span>
<a name="line-83"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>f1</span> <span class='hs-layout'>(</span><span class='hs-conid'>GuardedRhs</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>xs</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>g</span> <span class='hs-varid'>xs</span>
<a name="line-84"></a> <span class='hs-varid'>f2</span> <span class='hs-layout'>(</span><span class='hs-conid'>GuardedAlt</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>xs</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>g</span> <span class='hs-varid'>xs</span>
<a name="line-85"></a> <span class='hs-varid'>g</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-86"></a> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Qualifier</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-87"></a> <span class='hs-varid'>g</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-88"></a><span class='hs-definition'>used</span> <span class='hs-conid'>StandaloneDeriving</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasS</span> <span class='hs-varid'>isDerivDecl</span>
<a name="line-89"></a><span class='hs-definition'>used</span> <span class='hs-conid'>PatternSignatures</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasS</span> <span class='hs-varid'>isPatTypeSig</span>
<a name="line-90"></a><span class='hs-definition'>used</span> <span class='hs-conid'>RecordWildCards</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasS</span> <span class='hs-varid'>isPFieldWildcard</span> <span class='hs-varop'>&</span> <span class='hs-varid'>hasS</span> <span class='hs-varid'>isFieldWildcard</span>
<a name="line-91"></a><span class='hs-definition'>used</span> <span class='hs-conid'>RecordPuns</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasS</span> <span class='hs-varid'>isPFieldPun</span> <span class='hs-varop'>&</span> <span class='hs-varid'>hasS</span> <span class='hs-varid'>isFieldPun</span>
<a name="line-92"></a><span class='hs-definition'>used</span> <span class='hs-conid'>UnboxedTuples</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>has</span> <span class='hs-varid'>isBoxed</span>
<a name="line-93"></a><span class='hs-definition'>used</span> <span class='hs-conid'>PackageImports</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasS</span> <span class='hs-layout'>(</span><span class='hs-varid'>isJust</span> <span class='hs-varop'>.</span> <span class='hs-varid'>importPkg</span><span class='hs-layout'>)</span>
<a name="line-94"></a><span class='hs-definition'>used</span> <span class='hs-conid'>QuasiQuotes</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasS</span> <span class='hs-varid'>isQuasiQuote</span>
<a name="line-95"></a><span class='hs-definition'>used</span> <span class='hs-conid'>ViewPatterns</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasS</span> <span class='hs-varid'>isPViewPat</span>
<a name="line-96"></a><span class='hs-definition'>used</span> <span class='hs-conid'>Arrows</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasS</span> <span class='hs-varid'>f</span>
<a name="line-97"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>f</span> <span class='hs-conid'>Proc</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-98"></a> <span class='hs-varid'>f</span> <span class='hs-conid'>LeftArrApp</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-99"></a> <span class='hs-varid'>f</span> <span class='hs-conid'>RightArrApp</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-100"></a> <span class='hs-varid'>f</span> <span class='hs-conid'>LeftArrHighApp</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-101"></a> <span class='hs-varid'>f</span> <span class='hs-conid'>RightArrHighApp</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-102"></a> <span class='hs-varid'>f</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-103"></a><span class='hs-definition'>used</span> <span class='hs-conid'>TransformListComp</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasS</span> <span class='hs-varid'>f</span>
<a name="line-104"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>f</span> <span class='hs-conid'>QualStmt</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-105"></a> <span class='hs-varid'>f</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-106"></a>
<a name="line-107"></a><span class='hs-definition'>used</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>const</span> <span class='hs-conid'>True</span>
<a name="line-108"></a>
<a name="line-109"></a>
<a name="line-110"></a>
<a name="line-111"></a><a name="un"></a><span class='hs-definition'>un</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>undefined</span>
<a name="line-112"></a>
<a name="line-113"></a><a name="&"></a><span class='hs-layout'>(</span><span class='hs-varop'>&</span><span class='hs-layout'>)</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-varop'>||</span> <span class='hs-varid'>g</span> <span class='hs-varid'>x</span>
<a name="line-114"></a>
<a name="line-115"></a><a name="hasT"></a><span class='hs-definition'>hasT</span> <span class='hs-varid'>t</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>notNull</span> <span class='hs-layout'>(</span><span class='hs-varid'>universeBi</span> <span class='hs-varid'>x</span> <span class='hs-varop'>`asTypeOf`</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>t</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-116"></a><a name="hasT2"></a><span class='hs-definition'>hasT2</span> <span class='hs-keyglyph'>~</span><span class='hs-layout'>(</span><span class='hs-varid'>t1</span><span class='hs-layout'>,</span><span class='hs-varid'>t2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hasT</span> <span class='hs-varid'>t1</span> <span class='hs-varop'>&</span> <span class='hs-varid'>hasT</span> <span class='hs-varid'>t2</span>
<a name="line-117"></a>
<a name="line-118"></a><a name="hasS"></a><span class='hs-definition'>hasS</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Biplate</span> <span class='hs-varid'>x</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-conid'>S</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-conid'>S</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</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-conid'>Bool</span>
<a name="line-119"></a><span class='hs-definition'>hasS</span> <span class='hs-varid'>test</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>any</span> <span class='hs-varid'>test</span> <span class='hs-varop'>.</span> <span class='hs-varid'>universeBi</span>
<a name="line-120"></a>
<a name="line-121"></a><a name="has"></a><span class='hs-definition'>has</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>any</span> <span class='hs-varid'>f</span> <span class='hs-varop'>.</span> <span class='hs-varid'>universeBi</span>
<a name="line-122"></a>
</pre></body>
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