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<title>Language/Haskell/HsColour.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>-- | This is a library which colourises Haskell code.</span>
<a name="line-2"></a><span class='hs-comment'>-- It currently has six output formats:</span>
<a name="line-3"></a><span class='hs-comment'>--</span>
<a name="line-4"></a><span class='hs-comment'>-- * ANSI terminal codes</span>
<a name="line-5"></a><span class='hs-comment'>--</span>
<a name="line-6"></a><span class='hs-comment'>-- * LaTeX macros</span>
<a name="line-7"></a><span class='hs-comment'>--</span>
<a name="line-8"></a><span class='hs-comment'>-- * HTML 3.2 with font tags</span>
<a name="line-9"></a><span class='hs-comment'>--</span>
<a name="line-10"></a><span class='hs-comment'>-- * HTML 4.01 with external CSS.</span>
<a name="line-11"></a><span class='hs-comment'>--</span>
<a name="line-12"></a><span class='hs-comment'>-- * XHTML 1.0 with internal CSS.</span>
<a name="line-13"></a><span class='hs-comment'>--</span>
<a name="line-14"></a><span class='hs-comment'>-- * mIRC chat client colour codes.</span>
<a name="line-15"></a><span class='hs-comment'>--</span>
<a name="line-16"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Language</span><span class='hs-varop'>.</span><span class='hs-conid'>Haskell</span><span class='hs-varop'>.</span><span class='hs-conid'>HsColour</span> <span class='hs-layout'>(</span><span class='hs-conid'>Output</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>ColourPrefs</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-17"></a> <span class='hs-varid'>hscolour</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-18"></a>
<a name="line-19"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Language</span><span class='hs-varop'>.</span><span class='hs-conid'>Haskell</span><span class='hs-varop'>.</span><span class='hs-conid'>HsColour</span><span class='hs-varop'>.</span><span class='hs-conid'>Colourise</span> <span class='hs-layout'>(</span><span class='hs-conid'>ColourPrefs</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-20"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Language</span><span class='hs-varop'>.</span><span class='hs-conid'>Haskell</span><span class='hs-varop'>.</span><span class='hs-conid'>HsColour</span><span class='hs-varop'>.</span><span class='hs-conid'>TTY</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>TTY</span>
<a name="line-21"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Language</span><span class='hs-varop'>.</span><span class='hs-conid'>Haskell</span><span class='hs-varop'>.</span><span class='hs-conid'>HsColour</span><span class='hs-varop'>.</span><span class='hs-conid'>HTML</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>HTML</span>
<a name="line-22"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Language</span><span class='hs-varop'>.</span><span class='hs-conid'>Haskell</span><span class='hs-varop'>.</span><span class='hs-conid'>HsColour</span><span class='hs-varop'>.</span><span class='hs-conid'>CSS</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>CSS</span>
<a name="line-23"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Language</span><span class='hs-varop'>.</span><span class='hs-conid'>Haskell</span><span class='hs-varop'>.</span><span class='hs-conid'>HsColour</span><span class='hs-varop'>.</span><span class='hs-conid'>InlineCSS</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>ICSS</span>
<a name="line-24"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Language</span><span class='hs-varop'>.</span><span class='hs-conid'>Haskell</span><span class='hs-varop'>.</span><span class='hs-conid'>HsColour</span><span class='hs-varop'>.</span><span class='hs-conid'>LaTeX</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>LaTeX</span>
<a name="line-25"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Language</span><span class='hs-varop'>.</span><span class='hs-conid'>Haskell</span><span class='hs-varop'>.</span><span class='hs-conid'>HsColour</span><span class='hs-varop'>.</span><span class='hs-conid'>MIRC</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>MIRC</span>
<a name="line-26"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>List</span><span class='hs-layout'>(</span><span class='hs-varid'>mapAccumL</span><span class='hs-layout'>,</span> <span class='hs-varid'>isPrefixOf</span><span class='hs-layout'>)</span>
<a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Maybe</span>
<a name="line-28"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Language</span><span class='hs-varop'>.</span><span class='hs-conid'>Haskell</span><span class='hs-varop'>.</span><span class='hs-conid'>HsColour</span><span class='hs-varop'>.</span><span class='hs-conid'>Output</span>
<a name="line-29"></a><span class='hs-comment'>--import Debug.Trace</span>
<a name="line-30"></a>
<a name="line-31"></a><a name="hscolour"></a><span class='hs-comment'>-- | Colourise Haskell source code with the given output format.</span>
<a name="line-32"></a><span class='hs-definition'>hscolour</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Output</span> <span class='hs-comment'>-- ^ Output format.</span>
<a name="line-33"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ColourPrefs</span> <span class='hs-comment'>-- ^ Colour preferences (for formats that support them).</span>
<a name="line-34"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <span class='hs-comment'>-- ^ Whether to include anchors.</span>
<a name="line-35"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <span class='hs-comment'>-- ^ Whether output document is partial or complete.</span>
<a name="line-36"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Title for output.</span>
<a name="line-37"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <span class='hs-comment'>-- ^ Whether input document is literate haskell or not</span>
<a name="line-38"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Haskell source code.</span>
<a name="line-39"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Coloured Haskell source code.</span>
<a name="line-40"></a><span class='hs-definition'>hscolour</span> <span class='hs-varid'>output</span> <span class='hs-varid'>pref</span> <span class='hs-varid'>anchor</span> <span class='hs-varid'>partial</span> <span class='hs-varid'>title</span> <span class='hs-conid'>False</span> <span class='hs-keyglyph'>=</span>
<a name="line-41"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>if</span> <span class='hs-varid'>partial</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>id</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>top'n'tail</span> <span class='hs-varid'>output</span> <span class='hs-varid'>title</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span>
<a name="line-42"></a> <span class='hs-varid'>hscolour'</span> <span class='hs-varid'>output</span> <span class='hs-varid'>pref</span> <span class='hs-varid'>anchor</span>
<a name="line-43"></a><span class='hs-definition'>hscolour</span> <span class='hs-varid'>output</span> <span class='hs-varid'>pref</span> <span class='hs-varid'>anchor</span> <span class='hs-varid'>partial</span> <span class='hs-varid'>title</span> <span class='hs-conid'>True</span> <span class='hs-keyglyph'>=</span>
<a name="line-44"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>if</span> <span class='hs-varid'>partial</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>id</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>top'n'tail</span> <span class='hs-varid'>output</span> <span class='hs-varid'>title</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span>
<a name="line-45"></a> <span class='hs-varid'>concatMap</span> <span class='hs-varid'>chunk</span> <span class='hs-varop'>.</span> <span class='hs-varid'>joinL</span> <span class='hs-varop'>.</span> <span class='hs-varid'>classify</span> <span class='hs-varop'>.</span> <span class='hs-varid'>inlines</span>
<a name="line-46"></a> <span class='hs-keyword'>where</span>
<a name="line-47"></a> <span class='hs-varid'>chunk</span> <span class='hs-layout'>(</span><span class='hs-conid'>Code</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hscolour'</span> <span class='hs-varid'>output</span> <span class='hs-varid'>pref</span> <span class='hs-varid'>anchor</span> <span class='hs-varid'>c</span>
<a name="line-48"></a> <span class='hs-varid'>chunk</span> <span class='hs-layout'>(</span><span class='hs-conid'>Lit</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>c</span>
<a name="line-49"></a>
<a name="line-50"></a><a name="hscolour'"></a><span class='hs-comment'>-- | The actual colourising worker, despatched on the chosen output format.</span>
<a name="line-51"></a><span class='hs-definition'>hscolour'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Output</span> <span class='hs-comment'>-- ^ Output format.</span>
<a name="line-52"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ColourPrefs</span> <span class='hs-comment'>-- ^ Colour preferences (for formats that support them)</span>
<a name="line-53"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <span class='hs-comment'>-- ^ Whether to include anchors.</span>
<a name="line-54"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Haskell source code.</span>
<a name="line-55"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Coloured Haskell source code.</span>
<a name="line-56"></a><span class='hs-definition'>hscolour'</span> <span class='hs-conid'>TTY</span> <span class='hs-varid'>pref</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TTY</span><span class='hs-varop'>.</span><span class='hs-varid'>hscolour</span> <span class='hs-varid'>pref</span>
<a name="line-57"></a><span class='hs-definition'>hscolour'</span> <span class='hs-conid'>MIRC</span> <span class='hs-varid'>pref</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>MIRC</span><span class='hs-varop'>.</span><span class='hs-varid'>hscolour</span> <span class='hs-varid'>pref</span>
<a name="line-58"></a><span class='hs-definition'>hscolour'</span> <span class='hs-conid'>LaTeX</span> <span class='hs-varid'>pref</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LaTeX</span><span class='hs-varop'>.</span><span class='hs-varid'>hscolour</span> <span class='hs-varid'>pref</span>
<a name="line-59"></a><span class='hs-definition'>hscolour'</span> <span class='hs-conid'>HTML</span> <span class='hs-varid'>pref</span> <span class='hs-varid'>anchor</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>HTML</span><span class='hs-varop'>.</span><span class='hs-varid'>hscolour</span> <span class='hs-varid'>pref</span> <span class='hs-varid'>anchor</span>
<a name="line-60"></a><span class='hs-definition'>hscolour'</span> <span class='hs-conid'>CSS</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>anchor</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>CSS</span><span class='hs-varop'>.</span><span class='hs-varid'>hscolour</span> <span class='hs-varid'>anchor</span>
<a name="line-61"></a><span class='hs-definition'>hscolour'</span> <span class='hs-conid'>ICSS</span> <span class='hs-varid'>pref</span> <span class='hs-varid'>anchor</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ICSS</span><span class='hs-varop'>.</span><span class='hs-varid'>hscolour</span> <span class='hs-varid'>pref</span> <span class='hs-varid'>anchor</span>
<a name="line-62"></a>
<a name="line-63"></a><a name="top'n'tail"></a><span class='hs-comment'>-- | Choose the right headers\/footers, depending on the output format.</span>
<a name="line-64"></a><span class='hs-definition'>top'n'tail</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Output</span> <span class='hs-comment'>-- ^ Output format</span>
<a name="line-65"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Title for output</span>
<a name="line-66"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>-></span><span class='hs-conid'>String</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ Output transformer</span>
<a name="line-67"></a><span class='hs-definition'>top'n'tail</span> <span class='hs-conid'>TTY</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>id</span>
<a name="line-68"></a><span class='hs-definition'>top'n'tail</span> <span class='hs-conid'>MIRC</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>id</span>
<a name="line-69"></a><span class='hs-definition'>top'n'tail</span> <span class='hs-conid'>LaTeX</span> <span class='hs-varid'>title</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LaTeX</span><span class='hs-varop'>.</span><span class='hs-varid'>top'n'tail</span> <span class='hs-varid'>title</span>
<a name="line-70"></a><span class='hs-definition'>top'n'tail</span> <span class='hs-conid'>HTML</span> <span class='hs-varid'>title</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>HTML</span><span class='hs-varop'>.</span><span class='hs-varid'>top'n'tail</span> <span class='hs-varid'>title</span>
<a name="line-71"></a><span class='hs-definition'>top'n'tail</span> <span class='hs-conid'>CSS</span> <span class='hs-varid'>title</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>CSS</span><span class='hs-varop'>.</span><span class='hs-varid'>top'n'tail</span> <span class='hs-varid'>title</span>
<a name="line-72"></a><span class='hs-definition'>top'n'tail</span> <span class='hs-conid'>ICSS</span> <span class='hs-varid'>title</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ICSS</span><span class='hs-varop'>.</span><span class='hs-varid'>top'n'tail</span> <span class='hs-varid'>title</span>
<a name="line-73"></a>
<a name="line-74"></a><a name="Lit"></a><span class='hs-comment'>-- | Separating literate files into code\/comment chunks.</span>
<a name="line-75"></a><a name="Lit"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Lit</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Code</span> <span class='hs-layout'>{</span><span class='hs-varid'>unL</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Lit</span> <span class='hs-layout'>{</span><span class='hs-varid'>unL</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span><span class='hs-layout'>}</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span><span class='hs-layout'>)</span>
<a name="line-76"></a>
<a name="line-77"></a><a name="inlines"></a><span class='hs-comment'>-- Re-implementation of 'lines', for better efficiency (but decreased laziness).</span>
<a name="line-78"></a><span class='hs-comment'>-- Also, importantly, accepts non-standard DOS and Mac line ending characters.</span>
<a name="line-79"></a><span class='hs-comment'>-- And retains the trailing '\n' character in each resultant string.</span>
<a name="line-80"></a><span class='hs-definition'>inlines</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'>String</span><span class='hs-keyglyph'>]</span>
<a name="line-81"></a><span class='hs-definition'>inlines</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lines'</span> <span class='hs-varid'>s</span> <span class='hs-varid'>id</span>
<a name="line-82"></a> <span class='hs-keyword'>where</span>
<a name="line-83"></a> <span class='hs-varid'>lines'</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>acc</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>acc</span> <span class='hs-conid'>[]</span><span class='hs-keyglyph'>]</span>
<a name="line-84"></a> <span class='hs-varid'>lines'</span> <span class='hs-layout'>(</span><span class='hs-chr'>'\^M'</span><span class='hs-conop'>:</span><span class='hs-chr'>'\n'</span><span class='hs-conop'>:</span><span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varid'>acc</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>acc</span> <span class='hs-keyglyph'>[</span><span class='hs-chr'>'\n'</span><span class='hs-keyglyph'>]</span> <span class='hs-conop'>:</span> <span class='hs-varid'>lines'</span> <span class='hs-varid'>s</span> <span class='hs-varid'>id</span> <span class='hs-comment'>-- DOS</span>
<a name="line-85"></a><span class='hs-comment'>--lines' ('\^M':s) acc = acc ['\n'] : lines' s id -- MacOS</span>
<a name="line-86"></a> <span class='hs-varid'>lines'</span> <span class='hs-layout'>(</span><span class='hs-chr'>'\n'</span><span class='hs-conop'>:</span><span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varid'>acc</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>acc</span> <span class='hs-keyglyph'>[</span><span class='hs-chr'>'\n'</span><span class='hs-keyglyph'>]</span> <span class='hs-conop'>:</span> <span class='hs-varid'>lines'</span> <span class='hs-varid'>s</span> <span class='hs-varid'>id</span> <span class='hs-comment'>-- Unix</span>
<a name="line-87"></a> <span class='hs-varid'>lines'</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-conop'>:</span><span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varid'>acc</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lines'</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-varid'>acc</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-conop'>:</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-88"></a>
<a name="line-89"></a>
<a name="line-90"></a><a name="classify"></a><span class='hs-comment'>-- | The code for classify is largely stolen from Language.Preprocessor.Unlit.</span>
<a name="line-91"></a><span class='hs-definition'>classify</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-92"></a><span class='hs-definition'>classify</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-str'>"\\begin{code}"</span><span class='hs-varop'>`isPrefixOf`</span><span class='hs-varid'>x</span>
<a name="line-93"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Lit</span> <span class='hs-varid'>x</span><span class='hs-conop'>:</span> <span class='hs-varid'>allProg</span> <span class='hs-varid'>xs</span>
<a name="line-94"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>allProg</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span> <span class='hs-comment'>-- Should give an error message,</span>
<a name="line-95"></a> <span class='hs-comment'>-- but I have no good position information.</span>
<a name="line-96"></a> <span class='hs-varid'>allProg</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-str'>"\\end{code}"</span><span class='hs-varop'>`isPrefixOf`</span><span class='hs-varid'>x</span>
<a name="line-97"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Lit</span> <span class='hs-varid'>x</span><span class='hs-conop'>:</span> <span class='hs-varid'>classify</span> <span class='hs-varid'>xs</span>
<a name="line-98"></a> <span class='hs-varid'>allProg</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-conid'>Code</span> <span class='hs-varid'>x</span><span class='hs-conop'>:</span> <span class='hs-varid'>allProg</span> <span class='hs-varid'>xs</span>
<a name="line-99"></a><span class='hs-definition'>classify</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-chr'>'>'</span><span class='hs-conop'>:</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> <span class='hs-conid'>Code</span> <span class='hs-layout'>(</span><span class='hs-chr'>'>'</span><span class='hs-conop'>:</span><span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>classify</span> <span class='hs-varid'>xs</span>
<a name="line-100"></a><span class='hs-definition'>classify</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-conid'>Lit</span> <span class='hs-varid'>x</span><span class='hs-conop'>:</span> <span class='hs-varid'>classify</span> <span class='hs-varid'>xs</span>
<a name="line-101"></a>
<a name="line-102"></a><a name="joinL"></a><span class='hs-comment'>-- | Join up chunks of code\/comment that are next to each other.</span>
<a name="line-103"></a><span class='hs-definition'>joinL</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Lit</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Lit</span><span class='hs-keyglyph'>]</span>
<a name="line-104"></a><span class='hs-definition'>joinL</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-105"></a><span class='hs-definition'>joinL</span> <span class='hs-layout'>(</span><span class='hs-conid'>Code</span> <span class='hs-varid'>c</span><span class='hs-conop'>:</span><span class='hs-conid'>Code</span> <span class='hs-varid'>c2</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'>joinL</span> <span class='hs-layout'>(</span><span class='hs-conid'>Code</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-varop'>++</span><span class='hs-varid'>c2</span><span class='hs-layout'>)</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-definition'>joinL</span> <span class='hs-layout'>(</span><span class='hs-conid'>Lit</span> <span class='hs-varid'>c</span> <span class='hs-conop'>:</span><span class='hs-conid'>Lit</span> <span class='hs-varid'>c2</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'>joinL</span> <span class='hs-layout'>(</span><span class='hs-conid'>Lit</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-varop'>++</span><span class='hs-varid'>c2</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span>
<a name="line-107"></a><span class='hs-definition'>joinL</span> <span class='hs-layout'>(</span><span class='hs-varid'>any</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'>any</span><span class='hs-conop'>:</span> <span class='hs-varid'>joinL</span> <span class='hs-varid'>xs</span>
<a name="line-108"></a>
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