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<pre><a name="line-1"></a><span class='hs-comment'>{-
<a name="line-2"></a>Copyright (C) 2007 John Goerzen <jgoerzen@complete.org>
<a name="line-3"></a>
<a name="line-4"></a>All rights reserved.
<a name="line-5"></a>
<a name="line-6"></a>For license and copyright information, see the file COPYRIGHT
<a name="line-7"></a>
<a name="line-8"></a>-}</span>
<a name="line-9"></a>
<a name="line-10"></a><span class='hs-comment'>{- |
<a name="line-11"></a> Module : Data.ListLike.String
<a name="line-12"></a> Copyright : Copyright (C) 2007 John Goerzen
<a name="line-13"></a> License : BSD3
<a name="line-14"></a>
<a name="line-15"></a> Maintainer : John Lato <jwlato@gmail.com>
<a name="line-16"></a> Stability : provisional
<a name="line-17"></a> Portability: portable
<a name="line-18"></a>
<a name="line-19"></a>String-like functions
<a name="line-20"></a>
<a name="line-21"></a>Written by John Goerzen, jgoerzen\@complete.org
<a name="line-22"></a>-}</span>
<a name="line-23"></a>
<a name="line-24"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>ListLike</span><span class='hs-varop'>.</span><span class='hs-conid'>String</span>
<a name="line-25"></a> <span class='hs-layout'>(</span> <span class='hs-conid'>StringLike</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-26"></a> <span class='hs-layout'>)</span>
<a name="line-27"></a> <span class='hs-keyword'>where</span>
<a name="line-28"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Prelude</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span><span class='hs-layout'>,</span> <span class='hs-varid'>head</span><span class='hs-layout'>,</span> <span class='hs-varid'>last</span><span class='hs-layout'>,</span> <span class='hs-varid'>null</span><span class='hs-layout'>,</span> <span class='hs-varid'>tail</span><span class='hs-layout'>,</span> <span class='hs-varid'>map</span><span class='hs-layout'>,</span> <span class='hs-varid'>filter</span><span class='hs-layout'>,</span> <span class='hs-varid'>concat</span><span class='hs-layout'>,</span>
<a name="line-29"></a> <span class='hs-varid'>any</span><span class='hs-layout'>,</span> <span class='hs-varid'>lookup</span><span class='hs-layout'>,</span> <span class='hs-varid'>init</span><span class='hs-layout'>,</span> <span class='hs-varid'>all</span><span class='hs-layout'>,</span> <span class='hs-varid'>foldl</span><span class='hs-layout'>,</span> <span class='hs-varid'>foldr</span><span class='hs-layout'>,</span> <span class='hs-varid'>foldl1</span><span class='hs-layout'>,</span> <span class='hs-varid'>foldr1</span><span class='hs-layout'>,</span>
<a name="line-30"></a> <span class='hs-varid'>maximum</span><span class='hs-layout'>,</span> <span class='hs-varid'>minimum</span><span class='hs-layout'>,</span> <span class='hs-varid'>iterate</span><span class='hs-layout'>,</span> <span class='hs-varid'>span</span><span class='hs-layout'>,</span> <span class='hs-varid'>break</span><span class='hs-layout'>,</span> <span class='hs-varid'>takeWhile</span><span class='hs-layout'>,</span>
<a name="line-31"></a> <span class='hs-varid'>dropWhile</span><span class='hs-layout'>,</span> <span class='hs-varid'>reverse</span><span class='hs-layout'>,</span> <span class='hs-varid'>zip</span><span class='hs-layout'>,</span> <span class='hs-varid'>zipWith</span><span class='hs-layout'>,</span> <span class='hs-varid'>sequence</span><span class='hs-layout'>,</span>
<a name="line-32"></a> <span class='hs-varid'>sequence_</span><span class='hs-layout'>,</span> <span class='hs-varid'>mapM</span><span class='hs-layout'>,</span> <span class='hs-varid'>mapM_</span><span class='hs-layout'>,</span> <span class='hs-varid'>concatMap</span><span class='hs-layout'>,</span> <span class='hs-varid'>and</span><span class='hs-layout'>,</span> <span class='hs-varid'>or</span><span class='hs-layout'>,</span> <span class='hs-varid'>sum</span><span class='hs-layout'>,</span>
<a name="line-33"></a> <span class='hs-varid'>product</span><span class='hs-layout'>,</span> <span class='hs-varid'>repeat</span><span class='hs-layout'>,</span> <span class='hs-varid'>replicate</span><span class='hs-layout'>,</span> <span class='hs-varid'>cycle</span><span class='hs-layout'>,</span> <span class='hs-varid'>take</span><span class='hs-layout'>,</span> <span class='hs-varid'>drop</span><span class='hs-layout'>,</span>
<a name="line-34"></a> <span class='hs-varid'>splitAt</span><span class='hs-layout'>,</span> <span class='hs-varid'>elem</span><span class='hs-layout'>,</span> <span class='hs-varid'>notElem</span><span class='hs-layout'>,</span> <span class='hs-varid'>unzip</span><span class='hs-layout'>,</span> <span class='hs-varid'>lines</span><span class='hs-layout'>,</span> <span class='hs-varid'>words</span><span class='hs-layout'>,</span>
<a name="line-35"></a> <span class='hs-varid'>unlines</span><span class='hs-layout'>,</span> <span class='hs-varid'>unwords</span><span class='hs-layout'>)</span>
<a name="line-36"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>L</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'>ListLike</span><span class='hs-varop'>.</span><span class='hs-conid'>Base</span>
<a name="line-38"></a>
<a name="line-39"></a><span class='hs-comment'>{- | An extension to 'ListLike' for those data types that are similar
<a name="line-40"></a>to a 'String'. Minimal complete definition is 'toString' and
<a name="line-41"></a>'fromString'. -}</span>
<a name="line-42"></a><span class='hs-keyword'>class</span> <span class='hs-conid'>StringLike</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>where</span>
<a name="line-43"></a> <span class='hs-comment'>{- | Converts the structure to a 'String' -}</span>
<a name="line-44"></a> <span class='hs-varid'>toString</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-45"></a>
<a name="line-46"></a> <span class='hs-comment'>{- | Converts a 'String' to a list -}</span>
<a name="line-47"></a> <span class='hs-varid'>fromString</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span>
<a name="line-48"></a>
<a name="line-49"></a> <span class='hs-comment'>{- | Breaks a string into a list of strings -}</span>
<a name="line-50"></a> <span class='hs-varid'>lines</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>ListLike</span> <span class='hs-varid'>full</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>full</span>
<a name="line-51"></a> <span class='hs-comment'>--lines = map fromString . L.lines . toString </span>
<a name="line-52"></a> <span class='hs-varid'>lines</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>myLines</span>
<a name="line-53"></a>
<a name="line-54"></a> <span class='hs-comment'>{- | Breaks a string into a list of words -}</span>
<a name="line-55"></a> <span class='hs-varid'>words</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ListLike</span> <span class='hs-varid'>full</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>full</span>
<a name="line-56"></a> <span class='hs-varid'>words</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>myWords</span>
<a name="line-57"></a>
<a name="line-58"></a> <span class='hs-comment'>{- | Joins lines -}</span>
<a name="line-59"></a> <span class='hs-varid'>unlines</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ListLike</span> <span class='hs-varid'>full</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>full</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span>
<a name="line-60"></a> <span class='hs-varid'>unlines</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>myUnlines</span>
<a name="line-61"></a>
<a name="line-62"></a> <span class='hs-comment'>{- | Joins words -}</span>
<a name="line-63"></a> <span class='hs-varid'>unwords</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ListLike</span> <span class='hs-varid'>full</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>full</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span>
<a name="line-64"></a> <span class='hs-varid'>unwords</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>myUnwords</span>
<a name="line-65"></a>
<a name="line-66"></a><a name="myLines"></a><span class='hs-comment'>-- For some reason, Hugs required splitting these out into</span>
<a name="line-67"></a><span class='hs-comment'>-- separate functions.</span>
<a name="line-68"></a><span class='hs-definition'>myLines</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>StringLike</span> <span class='hs-varid'>s</span><span class='hs-layout'>,</span> <span class='hs-conid'>ListLike</span> <span class='hs-varid'>full</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>full</span>
<a name="line-69"></a><span class='hs-definition'>myLines</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-varid'>fromString</span> <span class='hs-varop'>.</span> <span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-varid'>lines</span> <span class='hs-varop'>.</span> <span class='hs-varid'>toString</span>
<a name="line-70"></a>
<a name="line-71"></a><a name="myWords"></a><span class='hs-definition'>myWords</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>StringLike</span> <span class='hs-varid'>s</span><span class='hs-layout'>,</span> <span class='hs-conid'>ListLike</span> <span class='hs-varid'>full</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>full</span>
<a name="line-72"></a><span class='hs-definition'>myWords</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-varid'>fromString</span> <span class='hs-varop'>.</span> <span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-varid'>words</span> <span class='hs-varop'>.</span> <span class='hs-varid'>toString</span>
<a name="line-73"></a>
<a name="line-74"></a><a name="myUnlines"></a><span class='hs-definition'>myUnlines</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>StringLike</span> <span class='hs-varid'>s</span><span class='hs-layout'>,</span> <span class='hs-conid'>ListLike</span> <span class='hs-varid'>full</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>full</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span>
<a name="line-75"></a><span class='hs-definition'>myUnlines</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromString</span> <span class='hs-varop'>.</span> <span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-varid'>unlines</span> <span class='hs-varop'>.</span> <span class='hs-varid'>map</span> <span class='hs-varid'>toString</span>
<a name="line-76"></a>
<a name="line-77"></a><a name="myUnwords"></a><span class='hs-definition'>myUnwords</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>StringLike</span> <span class='hs-varid'>s</span><span class='hs-layout'>,</span> <span class='hs-conid'>ListLike</span> <span class='hs-varid'>full</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>full</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span>
<a name="line-78"></a><span class='hs-definition'>myUnwords</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromString</span> <span class='hs-varop'>.</span> <span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-varid'>unwords</span> <span class='hs-varop'>.</span> <span class='hs-varid'>map</span> <span class='hs-varid'>toString</span>
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