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ghc-hlint-devel-1.8.7-1.fc15.i686.rpm

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<pre><a name="line-1"></a><span class='hs-comment'>{-
<a name="line-2"></a>    Suggest better pragmas
<a name="line-3"></a>    OPTIONS_GHC -cpp =&gt; LANGUAGE CPP
<a name="line-4"></a>    OPTIONS_GHC -fglasgow-exts =&gt; LANGUAGE ... (in HSE)
<a name="line-5"></a>    OPTIONS_GHC -XFoo =&gt; LANGUAGE Foo
<a name="line-6"></a>    LANGUAGE A, A =&gt; LANGUAGE A
<a name="line-7"></a>    -- do not do LANGUAGE A, LANGUAGE B to combine
<a name="line-8"></a>&lt;TEST&gt;
<a name="line-9"></a>{-# OPTIONS_GHC -cpp #-} -- {-# LANGUAGE CPP #-}
<a name="line-10"></a>{-# OPTIONS     -cpp #-} -- {-# LANGUAGE CPP #-}
<a name="line-11"></a>{-# OPTIONS_YHC -cpp #-}
<a name="line-12"></a>{-# OPTIONS_GHC -XFoo #-} -- {-# LANGUAGE Foo #-}
<a name="line-13"></a>{-# OPTIONS_GHC -fglasgow-exts #-} -- ???
<a name="line-14"></a>{-# LANGUAGE A, B, C, A #-} -- {-# LANGUAGE A, B, C #-}
<a name="line-15"></a>{-# LANGUAGE A #-}
<a name="line-16"></a>{-# OPTIONS_GHC -cpp -foo #-} -- {-# LANGUAGE CPP #-} {-# OPTIONS_GHC -foo #-}
<a name="line-17"></a>{-# OPTIONS_GHC -cpp #-} \
<a name="line-18"></a>{-# LANGUAGE CPP, Text #-} --
<a name="line-19"></a>{-# LANGUAGE A #-} \
<a name="line-20"></a>{-# LANGUAGE B #-}
<a name="line-21"></a>{-# LANGUAGE A #-} \
<a name="line-22"></a>{-# LANGUAGE B, A #-} -- {-# LANGUAGE A, B #-}
<a name="line-23"></a>&lt;/TEST&gt;
<a name="line-24"></a>-}</span>
<a name="line-25"></a>
<a name="line-26"></a>
<a name="line-27"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Hint</span><span class='hs-varop'>.</span><span class='hs-conid'>Pragma</span> <span class='hs-keyword'>where</span>
<a name="line-28"></a>
<a name="line-29"></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-30"></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-31"></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-32"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Util</span>
<a name="line-33"></a>
<a name="line-34"></a>
<a name="line-35"></a><a name="pragmaHint"></a><span class='hs-definition'>pragmaHint</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModuHint</span>
<a name="line-36"></a><span class='hs-definition'>pragmaHint</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>languageDupes</span> <span class='hs-varid'>lang</span> <span class='hs-varop'>++</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>pragmaIdea</span> <span class='hs-varid'>old</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>LanguagePragma</span> <span class='hs-varid'>an</span> <span class='hs-layout'>(</span><span class='hs-varid'>map</span> <span class='hs-varid'>toNamed</span> <span class='hs-varid'>ns2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>ns2</span> <span class='hs-varop'>/=</span> <span class='hs-conid'>[]</span><span class='hs-keyglyph'>]</span> <span class='hs-varop'>++</span> <span class='hs-varid'>catMaybes</span> <span class='hs-varid'>new</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>old</span> <span class='hs-varop'>/=</span> <span class='hs-conid'>[]</span><span class='hs-keyglyph'>]</span>
<a name="line-37"></a>    <span class='hs-keyword'>where</span>
<a name="line-38"></a>        <span class='hs-varid'>lang</span> <span class='hs-keyglyph'>=</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-conid'>LanguagePragma</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>modulePragmas</span> <span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span>
<a name="line-39"></a>        <span class='hs-layout'>(</span><span class='hs-varid'>old</span><span class='hs-layout'>,</span><span class='hs-varid'>new</span><span class='hs-layout'>,</span><span class='hs-varid'>ns</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unzip3</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>old</span><span class='hs-layout'>,</span><span class='hs-varid'>new</span><span class='hs-layout'>,</span><span class='hs-varid'>ns</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>old</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>modulePragmas</span> <span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>new</span><span class='hs-layout'>,</span><span class='hs-varid'>ns</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>optToLanguage</span> <span class='hs-varid'>old</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>]</span>
<a name="line-40"></a>        <span class='hs-varid'>ns2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>nub</span> <span class='hs-layout'>(</span><span class='hs-varid'>concat</span> <span class='hs-varid'>ns</span><span class='hs-layout'>)</span> <span class='hs-varop'>\\</span> <span class='hs-varid'>concat</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>map</span> <span class='hs-varid'>fromNamed</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LanguagePragma</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>lang</span><span class='hs-keyglyph'>]</span>
<a name="line-41"></a>
<a name="line-42"></a>
<a name="line-43"></a><a name="pragmaIdea"></a><span class='hs-definition'>pragmaIdea</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>ModulePragma</span> <span class='hs-conid'>S</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>ModulePragma</span> <span class='hs-conid'>S</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Idea</span>
<a name="line-44"></a><span class='hs-definition'>pragmaIdea</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>ys</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>rawIdea</span> <span class='hs-conid'>Error</span> <span class='hs-str'>"Use better pragmas"</span> <span class='hs-layout'>(</span><span class='hs-varid'>toSrcLoc</span> <span class='hs-varop'>$</span> <span class='hs-varid'>ann</span> <span class='hs-varop'>$</span> <span class='hs-varid'>head</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>ys</span><span class='hs-layout'>)</span>
<a name="line-45"></a>    <span class='hs-keyword'>where</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unlines</span> <span class='hs-varop'>.</span> <span class='hs-varid'>map</span> <span class='hs-varid'>prettyPrint</span>
<a name="line-46"></a>
<a name="line-47"></a>
<a name="line-48"></a><a name="languageDupes"></a><span class='hs-definition'>languageDupes</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>ModulePragma</span> <span class='hs-conid'>S</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Idea</span><span class='hs-keyglyph'>]</span>
<a name="line-49"></a><span class='hs-definition'>languageDupes</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-50"></a><span class='hs-definition'>languageDupes</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>LanguagePragma</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-51"></a>    <span class='hs-layout'>(</span><span class='hs-keyword'>if</span> <span class='hs-varid'>nub_</span> <span class='hs-varid'>x</span> <span class='hs-varop'>`neqList`</span> <span class='hs-varid'>x</span>
<a name="line-52"></a>        <span class='hs-keyword'>then</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>pragmaIdea</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>LanguagePragma</span> <span class='hs-varid'>an</span> <span class='hs-varop'>$</span> <span class='hs-varid'>nub_</span> <span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>]</span>
<a name="line-53"></a>        <span class='hs-keyword'>else</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>pragmaIdea</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>b</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>LanguagePragma</span> <span class='hs-varid'>an</span> <span class='hs-layout'>(</span><span class='hs-varid'>nub_</span> <span class='hs-varop'>$</span> <span class='hs-varid'>x</span> <span class='hs-varop'>++</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>b</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>LanguagePragma</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>xs</span><span class='hs-layout'>,</span> <span class='hs-varid'>notNull</span> <span class='hs-varop'>$</span> <span class='hs-varid'>intersect_</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span>
<a name="line-54"></a>    <span class='hs-varid'>languageDupes</span> <span class='hs-varid'>xs</span>
<a name="line-55"></a>
<a name="line-56"></a>
<a name="line-57"></a><a name="strToLanguage"></a><span class='hs-comment'>-- Given a pragma, can you extract some language features out</span>
<a name="line-58"></a><span class='hs-definition'>strToLanguage</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Maybe</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span>
<a name="line-59"></a><span class='hs-definition'>strToLanguage</span> <span class='hs-str'>"-cpp"</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-keyglyph'>[</span><span class='hs-str'>"CPP"</span><span class='hs-keyglyph'>]</span>
<a name="line-60"></a><span class='hs-definition'>strToLanguage</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>|</span> <span class='hs-str'>"-X"</span> <span class='hs-varop'>`isPrefixOf`</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>drop</span> <span class='hs-num'>2</span> <span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span>
<a name="line-61"></a><span class='hs-definition'>strToLanguage</span> <span class='hs-str'>"-fglasgow-exts"</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-varid'>show</span> <span class='hs-varid'>glasgowExts</span>
<a name="line-62"></a><span class='hs-definition'>strToLanguage</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-63"></a>
<a name="line-64"></a>
<a name="line-65"></a><a name="optToLanguage"></a><span class='hs-definition'>optToLanguage</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModulePragma</span> <span class='hs-conid'>S</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>ModulePragma</span> <span class='hs-conid'>S</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-66"></a><span class='hs-definition'>optToLanguage</span> <span class='hs-layout'>(</span><span class='hs-conid'>OptionsPragma</span> <span class='hs-varid'>sl</span> <span class='hs-varid'>tool</span> <span class='hs-varid'>val</span><span class='hs-layout'>)</span>
<a name="line-67"></a>    <span class='hs-keyglyph'>|</span> <span class='hs-varid'>maybe</span> <span class='hs-conid'>True</span> <span class='hs-layout'>(</span><span class='hs-varop'>==</span> <span class='hs-conid'>GHC</span><span class='hs-layout'>)</span> <span class='hs-varid'>tool</span> <span class='hs-varop'>&amp;&amp;</span> <span class='hs-varid'>any</span> <span class='hs-varid'>isJust</span> <span class='hs-varid'>vs</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>res</span><span class='hs-layout'>,</span> <span class='hs-varid'>concat</span> <span class='hs-varop'>$</span> <span class='hs-varid'>catMaybes</span> <span class='hs-varid'>vs</span><span class='hs-layout'>)</span>
<a name="line-68"></a>    <span class='hs-keyword'>where</span>
<a name="line-69"></a>        <span class='hs-varid'>strs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>words</span> <span class='hs-varid'>val</span>
<a name="line-70"></a>        <span class='hs-varid'>vs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-varid'>strToLanguage</span> <span class='hs-varid'>strs</span>
<a name="line-71"></a>        <span class='hs-varid'>keep</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concat</span> <span class='hs-varop'>$</span> <span class='hs-varid'>zipWith</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>v</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isNothing</span> <span class='hs-varid'>v</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varid'>vs</span> <span class='hs-varid'>strs</span>
<a name="line-72"></a>        <span class='hs-varid'>res</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-varid'>keep</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyword'>else</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>OptionsPragma</span> <span class='hs-varid'>sl</span> <span class='hs-varid'>tool</span> <span class='hs-layout'>(</span><span class='hs-varid'>unwords</span> <span class='hs-varid'>keep</span><span class='hs-layout'>)</span>
<a name="line-73"></a><span class='hs-definition'>optToLanguage</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
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