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<title>Language/Preprocessor/Cpphs/HashDefine.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-2"></a><span class='hs-comment'>-- |</span>
<a name="line-3"></a><span class='hs-comment'>-- Module : HashDefine</span>
<a name="line-4"></a><span class='hs-comment'>-- Copyright : 2004 Malcolm Wallace</span>
<a name="line-5"></a><span class='hs-comment'>-- Licence : LGPL</span>
<a name="line-6"></a><span class='hs-comment'>--</span>
<a name="line-7"></a><span class='hs-comment'>-- Maintainer : Malcolm Wallace <Malcolm.Wallace@cs.york.ac.uk></span>
<a name="line-8"></a><span class='hs-comment'>-- Stability : experimental</span>
<a name="line-9"></a><span class='hs-comment'>-- Portability : All</span>
<a name="line-10"></a><span class='hs-comment'>--</span>
<a name="line-11"></a><span class='hs-comment'>-- What structures are declared in a \#define.</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'>Language</span><span class='hs-varop'>.</span><span class='hs-conid'>Preprocessor</span><span class='hs-varop'>.</span><span class='hs-conid'>Cpphs</span><span class='hs-varop'>.</span><span class='hs-conid'>HashDefine</span>
<a name="line-15"></a> <span class='hs-layout'>(</span> <span class='hs-conid'>HashDefine</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-16"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>ArgOrText</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-17"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>expandMacro</span>
<a name="line-18"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>parseHashDefine</span>
<a name="line-19"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-20"></a>
<a name="line-21"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Char</span> <span class='hs-layout'>(</span><span class='hs-varid'>isSpace</span><span class='hs-layout'>)</span>
<a name="line-22"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span> <span class='hs-layout'>(</span><span class='hs-varid'>intersperse</span><span class='hs-layout'>)</span>
<a name="line-23"></a>
<a name="line-24"></a><a name="HashDefine"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>HashDefine</span>
<a name="line-25"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LineDrop</span>
<a name="line-26"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>name</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-layout'>}</span>
<a name="line-27"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Pragma</span>
<a name="line-28"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>name</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-layout'>}</span>
<a name="line-29"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>AntiDefined</span>
<a name="line-30"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>name</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span>
<a name="line-31"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>linebreaks</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span>
<a name="line-32"></a> <span class='hs-layout'>}</span>
<a name="line-33"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>SymbolReplacement</span>
<a name="line-34"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>name</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span>
<a name="line-35"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>replacement</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span>
<a name="line-36"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>linebreaks</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span>
<a name="line-37"></a> <span class='hs-layout'>}</span>
<a name="line-38"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>MacroExpansion</span>
<a name="line-39"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>name</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span>
<a name="line-40"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>arguments</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span>
<a name="line-41"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>expansion</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>ArgOrText</span><span class='hs-layout'>,</span><span class='hs-conid'>String</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-42"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>linebreaks</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span>
<a name="line-43"></a> <span class='hs-layout'>}</span>
<a name="line-44"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span><span class='hs-conid'>Show</span><span class='hs-layout'>)</span>
<a name="line-45"></a>
<a name="line-46"></a><a name="symbolReplacement"></a><span class='hs-comment'>-- | 'smart' constructor to avoid warnings from ghc (undefined fields)</span>
<a name="line-47"></a><span class='hs-definition'>symbolReplacement</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>HashDefine</span>
<a name="line-48"></a><span class='hs-definition'>symbolReplacement</span> <span class='hs-keyglyph'>=</span>
<a name="line-49"></a> <span class='hs-conid'>SymbolReplacement</span>
<a name="line-50"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>name</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>undefined</span><span class='hs-layout'>,</span> <span class='hs-varid'>replacement</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>undefined</span><span class='hs-layout'>,</span> <span class='hs-varid'>linebreaks</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>undefined</span> <span class='hs-layout'>}</span>
<a name="line-51"></a>
<a name="line-52"></a><a name="ArgOrText"></a><span class='hs-comment'>-- | Macro expansion text is divided into sections, each of which is classified</span>
<a name="line-53"></a><a name="ArgOrText"></a><span class='hs-comment'>-- as one of three kinds: a formal argument (Arg), plain text (Text),</span>
<a name="line-54"></a><a name="ArgOrText"></a><span class='hs-comment'>-- or a stringised formal argument (Str).</span>
<a name="line-55"></a><a name="ArgOrText"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>ArgOrText</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Arg</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Str</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span><span class='hs-conid'>Show</span><span class='hs-layout'>)</span>
<a name="line-56"></a>
<a name="line-57"></a><a name="expandMacro"></a><span class='hs-comment'>-- | Expand an instance of a macro.</span>
<a name="line-58"></a><span class='hs-comment'>-- Precondition: got a match on the macro name.</span>
<a name="line-59"></a><span class='hs-definition'>expandMacro</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>HashDefine</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-60"></a><span class='hs-definition'>expandMacro</span> <span class='hs-varid'>macro</span> <span class='hs-varid'>parameters</span> <span class='hs-varid'>layout</span> <span class='hs-keyglyph'>=</span>
<a name="line-61"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>env</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>zip</span> <span class='hs-layout'>(</span><span class='hs-varid'>arguments</span> <span class='hs-varid'>macro</span><span class='hs-layout'>)</span> <span class='hs-varid'>parameters</span>
<a name="line-62"></a> <span class='hs-varid'>replace</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arg</span><span class='hs-layout'>,</span><span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>error</span> <span class='hs-str'>"formal param"</span><span class='hs-layout'>)</span> <span class='hs-varid'>id</span> <span class='hs-layout'>(</span><span class='hs-varid'>lookup</span> <span class='hs-varid'>s</span> <span class='hs-varid'>env</span><span class='hs-layout'>)</span>
<a name="line-63"></a> <span class='hs-varid'>replace</span> <span class='hs-layout'>(</span><span class='hs-conid'>Str</span><span class='hs-layout'>,</span><span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>error</span> <span class='hs-str'>"formal param"</span><span class='hs-layout'>)</span> <span class='hs-varid'>str</span> <span class='hs-layout'>(</span><span class='hs-varid'>lookup</span> <span class='hs-varid'>s</span> <span class='hs-varid'>env</span><span class='hs-layout'>)</span>
<a name="line-64"></a> <span class='hs-varid'>replace</span> <span class='hs-layout'>(</span><span class='hs-conid'>Text</span><span class='hs-layout'>,</span><span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>layout</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-varop'>/=</span><span class='hs-chr'>'\n'</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span>
<a name="line-65"></a> <span class='hs-varid'>str</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-chr'>'"'</span><span class='hs-conop'>:</span><span class='hs-varid'>s</span><span class='hs-varop'>++</span><span class='hs-str'>"\""</span>
<a name="line-66"></a> <span class='hs-keyword'>in</span>
<a name="line-67"></a> <span class='hs-varid'>concatMap</span> <span class='hs-varid'>replace</span> <span class='hs-layout'>(</span><span class='hs-varid'>expansion</span> <span class='hs-varid'>macro</span><span class='hs-layout'>)</span>
<a name="line-68"></a>
<a name="line-69"></a><a name="parseHashDefine"></a><span class='hs-comment'>-- | Parse a \#define, or \#undef, ignoring other \# directives</span>
<a name="line-70"></a><span class='hs-definition'>parseHashDefine</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>HashDefine</span>
<a name="line-71"></a><span class='hs-definition'>parseHashDefine</span> <span class='hs-varid'>ansi</span> <span class='hs-varid'>def</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>command</span> <span class='hs-varop'>.</span> <span class='hs-varid'>skip</span><span class='hs-layout'>)</span> <span class='hs-varid'>def</span>
<a name="line-72"></a> <span class='hs-keyword'>where</span>
<a name="line-73"></a> <span class='hs-varid'>skip</span> <span class='hs-varid'>xss</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>all</span> <span class='hs-varid'>isSpace</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>skip</span> <span class='hs-varid'>xs</span>
<a name="line-74"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>xss</span>
<a name="line-75"></a> <span class='hs-varid'>skip</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-76"></a> <span class='hs-varid'>command</span> <span class='hs-layout'>(</span><span class='hs-str'>"line"</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>LineDrop</span> <span class='hs-layout'>(</span><span class='hs-str'>"#line"</span><span class='hs-varop'>++</span><span class='hs-varid'>concat</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-77"></a> <span class='hs-varid'>command</span> <span class='hs-layout'>(</span><span class='hs-str'>"pragma"</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Pragma</span> <span class='hs-layout'>(</span><span class='hs-str'>"#pragma"</span><span class='hs-varop'>++</span><span class='hs-varid'>concat</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-78"></a> <span class='hs-varid'>command</span> <span class='hs-layout'>(</span><span class='hs-str'>"define"</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>define</span> <span class='hs-varop'>.</span> <span class='hs-varid'>skip</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-layout'>{</span> <span class='hs-varid'>linebreaks</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>count</span> <span class='hs-varid'>def</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-79"></a> <span class='hs-varid'>command</span> <span class='hs-layout'>(</span><span class='hs-str'>"undef"</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>undef</span> <span class='hs-varop'>.</span> <span class='hs-varid'>skip</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-80"></a> <span class='hs-varid'>command</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-81"></a> <span class='hs-varid'>undef</span> <span class='hs-layout'>(</span><span class='hs-varid'>sym</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>AntiDefined</span> <span class='hs-layout'>{</span> <span class='hs-varid'>name</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>sym</span><span class='hs-layout'>,</span> <span class='hs-varid'>linebreaks</span><span class='hs-keyglyph'>=</span><span class='hs-num'>0</span> <span class='hs-layout'>}</span>
<a name="line-82"></a> <span class='hs-varid'>define</span> <span class='hs-layout'>(</span><span class='hs-varid'>sym</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-comment'>{-skip-}</span> <span class='hs-varid'>xs</span> <span class='hs-keyword'>of</span>
<a name="line-83"></a> <span class='hs-layout'>(</span><span class='hs-str'>"("</span><span class='hs-conop'>:</span><span class='hs-varid'>ys</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>macroHead</span> <span class='hs-varid'>sym</span> <span class='hs-conid'>[]</span> <span class='hs-varop'>.</span> <span class='hs-varid'>skip</span><span class='hs-layout'>)</span> <span class='hs-varid'>ys</span>
<a name="line-84"></a> <span class='hs-varid'>ys</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>symbolReplacement</span>
<a name="line-85"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>name</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>sym</span>
<a name="line-86"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>replacement</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concatMap</span> <span class='hs-varid'>snd</span>
<a name="line-87"></a> <span class='hs-layout'>(</span><span class='hs-varid'>classifyRhs</span> <span class='hs-conid'>[]</span> <span class='hs-layout'>(</span><span class='hs-varid'>chop</span> <span class='hs-layout'>(</span><span class='hs-varid'>skip</span> <span class='hs-varid'>ys</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>}</span>
<a name="line-88"></a> <span class='hs-varid'>macroHead</span> <span class='hs-varid'>sym</span> <span class='hs-varid'>args</span> <span class='hs-layout'>(</span><span class='hs-str'>","</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>macroHead</span> <span class='hs-varid'>sym</span> <span class='hs-varid'>args</span> <span class='hs-varop'>.</span> <span class='hs-varid'>skip</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span>
<a name="line-89"></a> <span class='hs-varid'>macroHead</span> <span class='hs-varid'>sym</span> <span class='hs-varid'>args</span> <span class='hs-layout'>(</span><span class='hs-str'>")"</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>MacroExpansion</span>
<a name="line-90"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>name</span> <span class='hs-keyglyph'>=</span><span class='hs-varid'>sym</span> <span class='hs-layout'>,</span> <span class='hs-varid'>arguments</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>reverse</span> <span class='hs-varid'>args</span>
<a name="line-91"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>expansion</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>classifyRhs</span> <span class='hs-varid'>args</span> <span class='hs-layout'>(</span><span class='hs-varid'>skip</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span>
<a name="line-92"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>linebreaks</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>undefined</span> <span class='hs-layout'>}</span>
<a name="line-93"></a> <span class='hs-varid'>macroHead</span> <span class='hs-varid'>sym</span> <span class='hs-varid'>args</span> <span class='hs-layout'>(</span><span class='hs-varid'>var</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>macroHead</span> <span class='hs-varid'>sym</span> <span class='hs-layout'>(</span><span class='hs-varid'>var</span><span class='hs-conop'>:</span><span class='hs-varid'>args</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>skip</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span>
<a name="line-94"></a> <span class='hs-varid'>macroHead</span> <span class='hs-varid'>sym</span> <span class='hs-varid'>args</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-layout'>(</span><span class='hs-str'>"incomplete macro definition:\n"</span>
<a name="line-95"></a> <span class='hs-varop'>++</span><span class='hs-str'>" #define "</span><span class='hs-varop'>++</span><span class='hs-varid'>sym</span><span class='hs-varop'>++</span><span class='hs-str'>"("</span>
<a name="line-96"></a> <span class='hs-varop'>++</span><span class='hs-varid'>concat</span> <span class='hs-layout'>(</span><span class='hs-varid'>intersperse</span> <span class='hs-str'>","</span> <span class='hs-varid'>args</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-97"></a> <span class='hs-varid'>classifyRhs</span> <span class='hs-varid'>args</span> <span class='hs-layout'>(</span><span class='hs-str'>"#"</span><span class='hs-conop'>:</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span>
<a name="line-98"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>ansi</span> <span class='hs-varop'>&&</span>
<a name="line-99"></a> <span class='hs-varid'>x</span> <span class='hs-varop'>`elem`</span> <span class='hs-varid'>args</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>Str</span><span class='hs-layout'>,</span><span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span> <span class='hs-varid'>classifyRhs</span> <span class='hs-varid'>args</span> <span class='hs-varid'>xs</span>
<a name="line-100"></a> <span class='hs-varid'>classifyRhs</span> <span class='hs-varid'>args</span> <span class='hs-layout'>(</span><span class='hs-str'>"##"</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span>
<a name="line-101"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>ansi</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>classifyRhs</span> <span class='hs-varid'>args</span> <span class='hs-varid'>xs</span>
<a name="line-102"></a> <span class='hs-varid'>classifyRhs</span> <span class='hs-varid'>args</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span><span class='hs-conop'>:</span><span class='hs-str'>"##"</span><span class='hs-conop'>:</span><span class='hs-varid'>s'</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span>
<a name="line-103"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>ansi</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>all</span> <span class='hs-varid'>isSpace</span> <span class='hs-varid'>s</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>all</span> <span class='hs-varid'>isSpace</span> <span class='hs-varid'>s'</span>
<a name="line-104"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>classifyRhs</span> <span class='hs-varid'>args</span> <span class='hs-varid'>xs</span>
<a name="line-105"></a> <span class='hs-varid'>classifyRhs</span> <span class='hs-varid'>args</span> <span class='hs-layout'>(</span><span class='hs-varid'>word</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span>
<a name="line-106"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>word</span> <span class='hs-varop'>`elem`</span> <span class='hs-varid'>args</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arg</span><span class='hs-layout'>,</span><span class='hs-varid'>word</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span> <span class='hs-varid'>classifyRhs</span> <span class='hs-varid'>args</span> <span class='hs-varid'>xs</span>
<a name="line-107"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>Text</span><span class='hs-layout'>,</span><span class='hs-varid'>word</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span> <span class='hs-varid'>classifyRhs</span> <span class='hs-varid'>args</span> <span class='hs-varid'>xs</span>
<a name="line-108"></a> <span class='hs-varid'>classifyRhs</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-109"></a> <span class='hs-varid'>count</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>length</span> <span class='hs-varop'>.</span> <span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-varop'>==</span><span class='hs-chr'>'\n'</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>concat</span>
<a name="line-110"></a> <span class='hs-varid'>chop</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>reverse</span> <span class='hs-varop'>.</span> <span class='hs-varid'>dropWhile</span> <span class='hs-layout'>(</span><span class='hs-varid'>all</span> <span class='hs-varid'>isSpace</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>reverse</span>
<a name="line-111"></a>
</pre></body>
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