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<pre><a name="line-1"></a><span class='hs-comment'>{-# OPTIONS_GHC -fno-warn-orphans #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# LANGUAGE BangPatterns, CPP #-}</span>
<a name="line-3"></a><span class='hs-comment'>-- |</span>
<a name="line-4"></a><span class='hs-comment'>-- Module : Data.Text.Lazy</span>
<a name="line-5"></a><span class='hs-comment'>-- Copyright : (c) 2009, 2010 Bryan O'Sullivan</span>
<a name="line-6"></a><span class='hs-comment'>--</span>
<a name="line-7"></a><span class='hs-comment'>-- License : BSD-style</span>
<a name="line-8"></a><span class='hs-comment'>-- Maintainer : bos@serpentine.com, rtomharper@googlemail.com,</span>
<a name="line-9"></a><span class='hs-comment'>-- duncan@haskell.org</span>
<a name="line-10"></a><span class='hs-comment'>-- Stability : experimental</span>
<a name="line-11"></a><span class='hs-comment'>-- Portability : GHC</span>
<a name="line-12"></a><span class='hs-comment'>--</span>
<a name="line-13"></a><span class='hs-comment'>-- A time and space-efficient implementation of Unicode text using</span>
<a name="line-14"></a><span class='hs-comment'>-- lists of packed arrays. This representation is suitable for high</span>
<a name="line-15"></a><span class='hs-comment'>-- performance use and for streaming large quantities of data. It</span>
<a name="line-16"></a><span class='hs-comment'>-- provides a means to manipulate a large body of text without</span>
<a name="line-17"></a><span class='hs-comment'>-- requiring that the entire content be resident in memory.</span>
<a name="line-18"></a><span class='hs-comment'>--</span>
<a name="line-19"></a><span class='hs-comment'>-- Some operations, such as 'concat', 'append', 'reverse' and 'cons',</span>
<a name="line-20"></a><span class='hs-comment'>-- have better complexity than their "Data.Text" equivalents, due to</span>
<a name="line-21"></a><span class='hs-comment'>-- optimisations resulting from the list spine structure. And for</span>
<a name="line-22"></a><span class='hs-comment'>-- other operations lazy 'Text's are usually within a few percent of</span>
<a name="line-23"></a><span class='hs-comment'>-- strict ones, but with better heap usage. For data larger than</span>
<a name="line-24"></a><span class='hs-comment'>-- available memory, or if you have tight memory constraints, this</span>
<a name="line-25"></a><span class='hs-comment'>-- module will be the only option.</span>
<a name="line-26"></a><span class='hs-comment'>--</span>
<a name="line-27"></a><span class='hs-comment'>-- This module is intended to be imported @qualified@, to avoid name</span>
<a name="line-28"></a><span class='hs-comment'>-- clashes with "Prelude" functions. eg.</span>
<a name="line-29"></a><span class='hs-comment'>--</span>
<a name="line-30"></a><span class='hs-comment'>-- > import qualified Data.Text.Lazy as L</span>
<a name="line-31"></a>
<a name="line-32"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Lazy</span>
<a name="line-33"></a> <span class='hs-layout'>(</span>
<a name="line-34"></a> <span class='hs-conid'>Text</span>
<a name="line-35"></a> <span class='hs-comment'>-- * Creation and elimination</span>
<a name="line-36"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>pack</span>
<a name="line-37"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>unpack</span>
<a name="line-38"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>singleton</span>
<a name="line-39"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>empty</span>
<a name="line-40"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>fromChunks</span>
<a name="line-41"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>toChunks</span>
<a name="line-42"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>toStrict</span>
<a name="line-43"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>fromStrict</span>
<a name="line-44"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>foldrChunks</span>
<a name="line-45"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>foldlChunks</span>
<a name="line-46"></a>
<a name="line-47"></a> <span class='hs-comment'>-- * Basic interface</span>
<a name="line-48"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>cons</span>
<a name="line-49"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>snoc</span>
<a name="line-50"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>append</span>
<a name="line-51"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>uncons</span>
<a name="line-52"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>head</span>
<a name="line-53"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>last</span>
<a name="line-54"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>tail</span>
<a name="line-55"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>init</span>
<a name="line-56"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>null</span>
<a name="line-57"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>length</span>
<a name="line-58"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>compareLength</span>
<a name="line-59"></a>
<a name="line-60"></a> <span class='hs-comment'>-- * Transformations</span>
<a name="line-61"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>map</span>
<a name="line-62"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>intercalate</span>
<a name="line-63"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>intersperse</span>
<a name="line-64"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>transpose</span>
<a name="line-65"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>reverse</span>
<a name="line-66"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>replace</span>
<a name="line-67"></a>
<a name="line-68"></a> <span class='hs-comment'>-- ** Case conversion</span>
<a name="line-69"></a> <span class='hs-comment'>-- $case</span>
<a name="line-70"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>toCaseFold</span>
<a name="line-71"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>toLower</span>
<a name="line-72"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>toUpper</span>
<a name="line-73"></a>
<a name="line-74"></a> <span class='hs-comment'>-- ** Justification</span>
<a name="line-75"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>justifyLeft</span>
<a name="line-76"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>justifyRight</span>
<a name="line-77"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>center</span>
<a name="line-78"></a>
<a name="line-79"></a> <span class='hs-comment'>-- * Folds</span>
<a name="line-80"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>foldl</span>
<a name="line-81"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>foldl'</span>
<a name="line-82"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>foldl1</span>
<a name="line-83"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>foldl1'</span>
<a name="line-84"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>foldr</span>
<a name="line-85"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>foldr1</span>
<a name="line-86"></a>
<a name="line-87"></a> <span class='hs-comment'>-- ** Special folds</span>
<a name="line-88"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>concat</span>
<a name="line-89"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>concatMap</span>
<a name="line-90"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>any</span>
<a name="line-91"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>all</span>
<a name="line-92"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>maximum</span>
<a name="line-93"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>minimum</span>
<a name="line-94"></a>
<a name="line-95"></a> <span class='hs-comment'>-- * Construction</span>
<a name="line-96"></a>
<a name="line-97"></a> <span class='hs-comment'>-- ** Scans</span>
<a name="line-98"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>scanl</span>
<a name="line-99"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>scanl1</span>
<a name="line-100"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>scanr</span>
<a name="line-101"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>scanr1</span>
<a name="line-102"></a>
<a name="line-103"></a> <span class='hs-comment'>-- ** Accumulating maps</span>
<a name="line-104"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>mapAccumL</span>
<a name="line-105"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>mapAccumR</span>
<a name="line-106"></a>
<a name="line-107"></a> <span class='hs-comment'>-- ** Generation and unfolding</span>
<a name="line-108"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>replicate</span>
<a name="line-109"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>unfoldr</span>
<a name="line-110"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>unfoldrN</span>
<a name="line-111"></a>
<a name="line-112"></a> <span class='hs-comment'>-- * Substrings</span>
<a name="line-113"></a>
<a name="line-114"></a> <span class='hs-comment'>-- ** Breaking strings</span>
<a name="line-115"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>take</span>
<a name="line-116"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>drop</span>
<a name="line-117"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>takeWhile</span>
<a name="line-118"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>dropWhile</span>
<a name="line-119"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>dropWhileEnd</span>
<a name="line-120"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>dropAround</span>
<a name="line-121"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>strip</span>
<a name="line-122"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>stripStart</span>
<a name="line-123"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>stripEnd</span>
<a name="line-124"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>splitAt</span>
<a name="line-125"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>spanBy</span>
<a name="line-126"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>break</span>
<a name="line-127"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>breakEnd</span>
<a name="line-128"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>breakBy</span>
<a name="line-129"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>group</span>
<a name="line-130"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>groupBy</span>
<a name="line-131"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>inits</span>
<a name="line-132"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>tails</span>
<a name="line-133"></a>
<a name="line-134"></a> <span class='hs-comment'>-- ** Breaking into many substrings</span>
<a name="line-135"></a> <span class='hs-comment'>-- $split</span>
<a name="line-136"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>split</span>
<a name="line-137"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>splitBy</span>
<a name="line-138"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>chunksOf</span>
<a name="line-139"></a> <span class='hs-comment'>-- , breakSubstring</span>
<a name="line-140"></a>
<a name="line-141"></a> <span class='hs-comment'>-- ** Breaking into lines and words</span>
<a name="line-142"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>lines</span>
<a name="line-143"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>words</span>
<a name="line-144"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>unlines</span>
<a name="line-145"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>unwords</span>
<a name="line-146"></a>
<a name="line-147"></a> <span class='hs-comment'>-- * Predicates</span>
<a name="line-148"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>isPrefixOf</span>
<a name="line-149"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>isSuffixOf</span>
<a name="line-150"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>isInfixOf</span>
<a name="line-151"></a>
<a name="line-152"></a> <span class='hs-comment'>-- ** View patterns</span>
<a name="line-153"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>stripPrefix</span>
<a name="line-154"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>stripSuffix</span>
<a name="line-155"></a>
<a name="line-156"></a> <span class='hs-comment'>-- * Searching</span>
<a name="line-157"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>filter</span>
<a name="line-158"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>find</span>
<a name="line-159"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>findBy</span>
<a name="line-160"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>partitionBy</span>
<a name="line-161"></a>
<a name="line-162"></a> <span class='hs-comment'>-- , findSubstring</span>
<a name="line-163"></a>
<a name="line-164"></a> <span class='hs-comment'>-- * Indexing</span>
<a name="line-165"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>index</span>
<a name="line-166"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>count</span>
<a name="line-167"></a>
<a name="line-168"></a> <span class='hs-comment'>-- * Zipping and unzipping</span>
<a name="line-169"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>zip</span>
<a name="line-170"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>zipWith</span>
<a name="line-171"></a>
<a name="line-172"></a> <span class='hs-comment'>-- -* Ordered text</span>
<a name="line-173"></a> <span class='hs-comment'>-- , sort</span>
<a name="line-174"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-175"></a>
<a name="line-176"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Prelude</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</span><span class='hs-layout'>,</span> <span class='hs-conid'>Bool</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'>Maybe</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'>String</span><span class='hs-layout'>,</span>
<a name="line-177"></a> <span class='hs-conid'>Eq</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'>Ord</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'>Ordering</span><span class='hs-layout'>,</span> <span class='hs-conid'>Read</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'>Show</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-178"></a> <span class='hs-layout'>(</span><span class='hs-varop'>&&</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varop'>+</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varop'>.</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varop'>$</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-179"></a> <span class='hs-varid'>div</span><span class='hs-layout'>,</span> <span class='hs-varid'>error</span><span class='hs-layout'>,</span> <span class='hs-varid'>flip</span><span class='hs-layout'>,</span> <span class='hs-varid'>fromIntegral</span><span class='hs-layout'>,</span> <span class='hs-varid'>not</span><span class='hs-layout'>,</span> <span class='hs-varid'>otherwise</span><span class='hs-layout'>)</span>
<a name="line-180"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Prelude</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>P</span>
<a name="line-181"></a><span class='hs-cpp'>#if defined(HAVE_DEEPSEQ)</span>
<a name="line-182"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>DeepSeq</span> <span class='hs-layout'>(</span><span class='hs-conid'>NFData</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-183"></a><span class='hs-cpp'>#endif</span>
<a name="line-184"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Int</span> <span class='hs-layout'>(</span><span class='hs-conid'>Int64</span><span class='hs-layout'>)</span>
<a name="line-185"></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-186"></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-187"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Data</span> <span class='hs-layout'>(</span><span class='hs-conid'>Data</span><span class='hs-layout'>(</span><span class='hs-varid'>gfoldl</span><span class='hs-layout'>,</span> <span class='hs-varid'>toConstr</span><span class='hs-layout'>,</span> <span class='hs-varid'>gunfold</span><span class='hs-layout'>,</span> <span class='hs-varid'>dataTypeOf</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-188"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ >= 612</span>
<a name="line-189"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Data</span> <span class='hs-layout'>(</span><span class='hs-varid'>mkNoRepType</span><span class='hs-layout'>)</span>
<a name="line-190"></a><span class='hs-cpp'>#else</span>
<a name="line-191"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Data</span> <span class='hs-layout'>(</span><span class='hs-varid'>mkNorepType</span><span class='hs-layout'>)</span>
<a name="line-192"></a><span class='hs-cpp'>#endif</span>
<a name="line-193"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Monoid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Monoid</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-194"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>String</span> <span class='hs-layout'>(</span><span class='hs-conid'>IsString</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-195"></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'>Text</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>T</span>
<a name="line-196"></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'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>T</span>
<a name="line-197"></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'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Fusion</span><span class='hs-varop'>.</span><span class='hs-conid'>Common</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>S</span>
<a name="line-198"></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'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Unsafe</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>T</span>
<a name="line-199"></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'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-conid'>Fusion</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>S</span>
<a name="line-200"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Fusion</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span> <span class='hs-layout'>(</span><span class='hs-conid'>PairS</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-201"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-conid'>Fusion</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span><span class='hs-layout'>,</span> <span class='hs-varid'>unstream</span><span class='hs-layout'>)</span>
<a name="line-202"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span> <span class='hs-layout'>(</span><span class='hs-conid'>Text</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>chunk</span><span class='hs-layout'>,</span> <span class='hs-varid'>empty</span><span class='hs-layout'>,</span> <span class='hs-varid'>foldlChunks</span><span class='hs-layout'>,</span> <span class='hs-varid'>foldrChunks</span><span class='hs-layout'>)</span>
<a name="line-203"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span> <span class='hs-layout'>(</span><span class='hs-varid'>textP</span><span class='hs-layout'>)</span>
<a name="line-204"></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'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Util</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>U</span>
<a name="line-205"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-conid'>Search</span> <span class='hs-layout'>(</span><span class='hs-varid'>indices</span><span class='hs-layout'>)</span>
<a name="line-206"></a>
<a name="line-207"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Eq</span> <span class='hs-conid'>Text</span> <span class='hs-keyword'>where</span>
<a name="line-208"></a> <span class='hs-varid'>t1</span> <span class='hs-varop'>==</span> <span class='hs-varid'>t2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>stream</span> <span class='hs-varid'>t1</span> <span class='hs-varop'>==</span> <span class='hs-varid'>stream</span> <span class='hs-varid'>t2</span>
<a name="line-209"></a> <span class='hs-comment'>{-# INLINE (==) #-}</span>
<a name="line-210"></a>
<a name="line-211"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Ord</span> <span class='hs-conid'>Text</span> <span class='hs-keyword'>where</span>
<a name="line-212"></a> <span class='hs-varid'>compare</span> <span class='hs-varid'>t1</span> <span class='hs-varid'>t2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>compare</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t2</span><span class='hs-layout'>)</span>
<a name="line-213"></a> <span class='hs-comment'>{-# INLINE compare #-}</span>
<a name="line-214"></a>
<a name="line-215"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-conid'>Text</span> <span class='hs-keyword'>where</span>
<a name="line-216"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-varid'>p</span> <span class='hs-varid'>ps</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showsPrec</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>ps</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span>
<a name="line-217"></a>
<a name="line-218"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Read</span> <span class='hs-conid'>Text</span> <span class='hs-keyword'>where</span>
<a name="line-219"></a> <span class='hs-varid'>readsPrec</span> <span class='hs-varid'>p</span> <span class='hs-varid'>str</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>pack</span> <span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readsPrec</span> <span class='hs-varid'>p</span> <span class='hs-varid'>str</span><span class='hs-keyglyph'>]</span>
<a name="line-220"></a>
<a name="line-221"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Monoid</span> <span class='hs-conid'>Text</span> <span class='hs-keyword'>where</span>
<a name="line-222"></a> <span class='hs-varid'>mempty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>empty</span>
<a name="line-223"></a> <span class='hs-varid'>mappend</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>append</span>
<a name="line-224"></a> <span class='hs-varid'>mconcat</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concat</span>
<a name="line-225"></a>
<a name="line-226"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>IsString</span> <span class='hs-conid'>Text</span> <span class='hs-keyword'>where</span>
<a name="line-227"></a> <span class='hs-varid'>fromString</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pack</span>
<a name="line-228"></a>
<a name="line-229"></a><span class='hs-cpp'>#if defined(HAVE_DEEPSEQ)</span>
<a name="line-230"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>NFData</span> <span class='hs-conid'>Text</span> <span class='hs-keyword'>where</span>
<a name="line-231"></a> <span class='hs-varid'>rnf</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>()</span>
<a name="line-232"></a> <span class='hs-varid'>rnf</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>rnf</span> <span class='hs-varid'>ts</span>
<a name="line-233"></a><span class='hs-cpp'>#endif</span>
<a name="line-234"></a>
<a name="line-235"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Data</span> <span class='hs-conid'>Text</span> <span class='hs-keyword'>where</span>
<a name="line-236"></a> <span class='hs-varid'>gfoldl</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-varid'>txt</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>z</span> <span class='hs-varid'>pack</span> <span class='hs-varop'>`f`</span> <span class='hs-layout'>(</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>txt</span><span class='hs-layout'>)</span>
<a name="line-237"></a> <span class='hs-varid'>toConstr</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-str'>"Data.Text.Lazy.Text.toConstr"</span>
<a name="line-238"></a> <span class='hs-varid'>gunfold</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-str'>"Data.Text.Lazy.Text.gunfold"</span>
<a name="line-239"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ >= 612</span>
<a name="line-240"></a> <span class='hs-varid'>dataTypeOf</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mkNoRepType</span> <span class='hs-str'>"Data.Text.Lazy.Text"</span>
<a name="line-241"></a><span class='hs-cpp'>#else</span>
<a name="line-242"></a> <span class='hs-varid'>dataTypeOf</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mkNorepType</span> <span class='hs-str'>"Data.Text.Lazy.Text"</span>
<a name="line-243"></a><span class='hs-cpp'>#endif</span>
<a name="line-244"></a>
<a name="line-245"></a><a name="pack"></a><span class='hs-comment'>-- | /O(n)/ Convert a 'String' into a 'Text'.</span>
<a name="line-246"></a><span class='hs-comment'>--</span>
<a name="line-247"></a><span class='hs-comment'>-- This function is subject to array fusion.</span>
<a name="line-248"></a><span class='hs-definition'>pack</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-249"></a><span class='hs-definition'>pack</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unstream</span> <span class='hs-layout'>(</span><span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>streamList</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-250"></a><span class='hs-comment'>{-# INLINE [1] pack #-}</span>
<a name="line-251"></a>
<a name="line-252"></a><a name="unpack"></a><span class='hs-comment'>-- | /O(n)/ Convert a 'Text' into a 'String'.</span>
<a name="line-253"></a><span class='hs-comment'>-- Subject to array fusion.</span>
<a name="line-254"></a><span class='hs-definition'>unpack</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-255"></a><span class='hs-definition'>unpack</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>unstreamList</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-256"></a><span class='hs-comment'>{-# INLINE [1] unpack #-}</span>
<a name="line-257"></a>
<a name="line-258"></a><a name="singleton"></a><span class='hs-comment'>-- | /O(1)/ Convert a character into a Text.</span>
<a name="line-259"></a><span class='hs-comment'>-- Subject to fusion.</span>
<a name="line-260"></a><span class='hs-definition'>singleton</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-261"></a><span class='hs-definition'>singleton</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Chunk</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-conid'>Empty</span>
<a name="line-262"></a><span class='hs-comment'>{-# INLINE [1] singleton #-}</span>
<a name="line-263"></a>
<a name="line-264"></a><span class='hs-comment'>{-# RULES
<a name="line-265"></a>"LAZY TEXT singleton -> fused" [~1] forall c.
<a name="line-266"></a> singleton c = unstream (S.singleton c)
<a name="line-267"></a>"LAZY TEXT singleton -> unfused" [1] forall c.
<a name="line-268"></a> unstream (S.singleton c) = singleton c
<a name="line-269"></a> #-}</span>
<a name="line-270"></a>
<a name="line-271"></a><a name="fromChunks"></a><span class='hs-comment'>-- | /O(c)/ Convert a list of strict 'T.Text's into a lazy 'Text'.</span>
<a name="line-272"></a><span class='hs-definition'>fromChunks</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-273"></a><span class='hs-definition'>fromChunks</span> <span class='hs-varid'>cs</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-varid'>foldr</span> <span class='hs-varid'>chunk</span> <span class='hs-conid'>Empty</span> <span class='hs-varid'>cs</span>
<a name="line-274"></a>
<a name="line-275"></a><a name="toChunks"></a><span class='hs-comment'>-- | /O(n)/ Convert a lazy 'Text' into a list of strict 'T.Text's.</span>
<a name="line-276"></a><span class='hs-definition'>toChunks</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span>
<a name="line-277"></a><span class='hs-definition'>toChunks</span> <span class='hs-varid'>cs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldrChunks</span> <span class='hs-layout'>(</span><span class='hs-conop'>:</span><span class='hs-layout'>)</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>cs</span>
<a name="line-278"></a>
<a name="line-279"></a><a name="toStrict"></a><span class='hs-comment'>-- | /O(n)/ Convert a lazy 'Text' into a strict 'T.Text'.</span>
<a name="line-280"></a><span class='hs-definition'>toStrict</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span>
<a name="line-281"></a><span class='hs-definition'>toStrict</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>concat</span> <span class='hs-layout'>(</span><span class='hs-varid'>toChunks</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-282"></a><span class='hs-comment'>{-# INLINE [1] toStrict #-}</span>
<a name="line-283"></a>
<a name="line-284"></a><a name="fromStrict"></a><span class='hs-comment'>-- | /O(c)/ Convert a strict 'T.Text' into a lazy 'Text'.</span>
<a name="line-285"></a><span class='hs-definition'>fromStrict</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-286"></a><span class='hs-definition'>fromStrict</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>chunk</span> <span class='hs-varid'>t</span> <span class='hs-conid'>Empty</span>
<a name="line-287"></a><span class='hs-comment'>{-# INLINE [1] fromStrict #-}</span>
<a name="line-288"></a>
<a name="line-289"></a><span class='hs-comment'>-- -----------------------------------------------------------------------------</span>
<a name="line-290"></a><span class='hs-comment'>-- * Basic functions</span>
<a name="line-291"></a>
<a name="line-292"></a><a name="cons"></a><span class='hs-comment'>-- | /O(n)/ Adds a character to the front of a 'Text'. This function</span>
<a name="line-293"></a><span class='hs-comment'>-- is more costly than its 'List' counterpart because it requires</span>
<a name="line-294"></a><span class='hs-comment'>-- copying a new array. Subject to fusion.</span>
<a name="line-295"></a><span class='hs-definition'>cons</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-296"></a><span class='hs-definition'>cons</span> <span class='hs-varid'>c</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Chunk</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span>
<a name="line-297"></a><span class='hs-comment'>{-# INLINE [1] cons #-}</span>
<a name="line-298"></a>
<a name="line-299"></a><span class='hs-comment'>{-# RULES
<a name="line-300"></a>"LAZY TEXT cons -> fused" [~1] forall c t.
<a name="line-301"></a> cons c t = unstream (S.cons c (stream t))
<a name="line-302"></a>"LAZY TEXT cons -> unfused" [1] forall c t.
<a name="line-303"></a> unstream (S.cons c (stream t)) = cons c t
<a name="line-304"></a> #-}</span>
<a name="line-305"></a>
<a name="line-306"></a><a name="snoc"></a><span class='hs-comment'>-- | /O(n)/ Adds a character to the end of a 'Text'. This copies the</span>
<a name="line-307"></a><span class='hs-comment'>-- entire array in the process, unless fused. Subject to fusion.</span>
<a name="line-308"></a><span class='hs-definition'>snoc</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-309"></a><span class='hs-definition'>snoc</span> <span class='hs-varid'>t</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldrChunks</span> <span class='hs-conid'>Chunk</span> <span class='hs-layout'>(</span><span class='hs-varid'>singleton</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span>
<a name="line-310"></a><span class='hs-comment'>{-# INLINE [1] snoc #-}</span>
<a name="line-311"></a>
<a name="line-312"></a><span class='hs-comment'>{-# RULES
<a name="line-313"></a>"LAZY TEXT snoc -> fused" [~1] forall t c.
<a name="line-314"></a> snoc t c = unstream (S.snoc (stream t) c)
<a name="line-315"></a>"LAZY TEXT snoc -> unfused" [1] forall t c.
<a name="line-316"></a> unstream (S.snoc (stream t) c) = snoc t c
<a name="line-317"></a> #-}</span>
<a name="line-318"></a>
<a name="line-319"></a><a name="append"></a><span class='hs-comment'>-- | /O(n\/c)/ Appends one 'Text' to another. Subject to array</span>
<a name="line-320"></a><span class='hs-comment'>-- fusion.</span>
<a name="line-321"></a><span class='hs-definition'>append</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-322"></a><span class='hs-definition'>append</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>ys</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldrChunks</span> <span class='hs-conid'>Chunk</span> <span class='hs-varid'>ys</span> <span class='hs-varid'>xs</span>
<a name="line-323"></a><span class='hs-comment'>{-# INLINE [1] append #-}</span>
<a name="line-324"></a>
<a name="line-325"></a><span class='hs-comment'>{-# RULES
<a name="line-326"></a>"LAZY TEXT append -> fused" [~1] forall t1 t2.
<a name="line-327"></a> append t1 t2 = unstream (S.append (stream t1) (stream t2))
<a name="line-328"></a>"LAZY TEXT append -> unfused" [1] forall t1 t2.
<a name="line-329"></a> unstream (S.append (stream t1) (stream t2)) = append t1 t2
<a name="line-330"></a> #-}</span>
<a name="line-331"></a>
<a name="line-332"></a><a name="uncons"></a><span class='hs-comment'>-- | /O(1)/ Returns the first character and rest of a 'Text', or</span>
<a name="line-333"></a><span class='hs-comment'>-- 'Nothing' if empty. Subject to array fusion.</span>
<a name="line-334"></a><span class='hs-definition'>uncons</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</span><span class='hs-layout'>,</span> <span class='hs-conid'>Text</span><span class='hs-layout'>)</span>
<a name="line-335"></a><span class='hs-definition'>uncons</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-336"></a><span class='hs-definition'>uncons</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-337"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>unsafeHead</span> <span class='hs-varid'>t</span><span class='hs-layout'>,</span>
<a name="line-338"></a> <span class='hs-keyword'>if</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>t</span> <span class='hs-varop'>==</span> <span class='hs-num'>1</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>ts</span> <span class='hs-keyword'>else</span> <span class='hs-conid'>Chunk</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>unsafeTail</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span>
<a name="line-339"></a><span class='hs-comment'>{-# INLINE uncons #-}</span>
<a name="line-340"></a>
<a name="line-341"></a><a name="head"></a><span class='hs-comment'>-- | /O(1)/ Returns the first character of a 'Text', which must be</span>
<a name="line-342"></a><span class='hs-comment'>-- non-empty. Subject to array fusion.</span>
<a name="line-343"></a><span class='hs-definition'>head</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span>
<a name="line-344"></a><span class='hs-definition'>head</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>head</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-345"></a><span class='hs-comment'>{-# INLINE head #-}</span>
<a name="line-346"></a>
<a name="line-347"></a><a name="tail"></a><span class='hs-comment'>-- | /O(1)/ Returns all characters after the head of a 'Text', which</span>
<a name="line-348"></a><span class='hs-comment'>-- must be non-empty. Subject to array fusion.</span>
<a name="line-349"></a><span class='hs-definition'>tail</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-350"></a><span class='hs-definition'>tail</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>chunk</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>tail</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varid'>ts</span>
<a name="line-351"></a><span class='hs-definition'>tail</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>emptyError</span> <span class='hs-str'>"tail"</span>
<a name="line-352"></a><span class='hs-comment'>{-# INLINE [1] tail #-}</span>
<a name="line-353"></a>
<a name="line-354"></a><span class='hs-comment'>{-# RULES
<a name="line-355"></a>"LAZY TEXT tail -> fused" [~1] forall t.
<a name="line-356"></a> tail t = unstream (S.tail (stream t))
<a name="line-357"></a>"LAZY TEXT tail -> unfused" [1] forall t.
<a name="line-358"></a> unstream (S.tail (stream t)) = tail t
<a name="line-359"></a> #-}</span>
<a name="line-360"></a>
<a name="line-361"></a><a name="init"></a><span class='hs-comment'>-- | /O(1)/ Returns all but the last character of a 'Text', which must</span>
<a name="line-362"></a><span class='hs-comment'>-- be non-empty. Subject to array fusion.</span>
<a name="line-363"></a><span class='hs-definition'>init</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-364"></a><span class='hs-definition'>init</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t0</span> <span class='hs-varid'>ts0</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span> <span class='hs-varid'>t0</span> <span class='hs-varid'>ts0</span>
<a name="line-365"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>go</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t'</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-varid'>go</span> <span class='hs-varid'>t'</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span>
<a name="line-366"></a> <span class='hs-varid'>go</span> <span class='hs-varid'>t</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>chunk</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>init</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-conid'>Empty</span>
<a name="line-367"></a><span class='hs-definition'>init</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>emptyError</span> <span class='hs-str'>"init"</span>
<a name="line-368"></a><span class='hs-comment'>{-# INLINE [1] init #-}</span>
<a name="line-369"></a>
<a name="line-370"></a><span class='hs-comment'>{-# RULES
<a name="line-371"></a>"LAZY TEXT init -> fused" [~1] forall t.
<a name="line-372"></a> init t = unstream (S.init (stream t))
<a name="line-373"></a>"LAZY TEXT init -> unfused" [1] forall t.
<a name="line-374"></a> unstream (S.init (stream t)) = init t
<a name="line-375"></a> #-}</span>
<a name="line-376"></a>
<a name="line-377"></a><a name="null"></a><span class='hs-comment'>-- | /O(1)/ Tests whether a 'Text' is empty or not. Subject to array</span>
<a name="line-378"></a><span class='hs-comment'>-- fusion.</span>
<a name="line-379"></a><span class='hs-definition'>null</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-380"></a><span class='hs-definition'>null</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-381"></a><span class='hs-definition'>null</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-382"></a><span class='hs-comment'>{-# INLINE [1] null #-}</span>
<a name="line-383"></a>
<a name="line-384"></a><span class='hs-comment'>{-# RULES
<a name="line-385"></a>"LAZY TEXT null -> fused" [~1] forall t.
<a name="line-386"></a> null t = S.null (stream t)
<a name="line-387"></a>"LAZY TEXT null -> unfused" [1] forall t.
<a name="line-388"></a> S.null (stream t) = null t
<a name="line-389"></a> #-}</span>
<a name="line-390"></a>
<a name="line-391"></a><a name="isSingleton"></a><span class='hs-comment'>-- | /O(1)/ Tests whether a 'Text' contains exactly one character.</span>
<a name="line-392"></a><span class='hs-comment'>-- Subject to fusion.</span>
<a name="line-393"></a><span class='hs-definition'>isSingleton</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-394"></a><span class='hs-definition'>isSingleton</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>isSingleton</span> <span class='hs-varop'>.</span> <span class='hs-varid'>stream</span>
<a name="line-395"></a><span class='hs-comment'>{-# INLINE isSingleton #-}</span>
<a name="line-396"></a>
<a name="line-397"></a><a name="last"></a><span class='hs-comment'>-- | /O(1)/ Returns the last character of a 'Text', which must be</span>
<a name="line-398"></a><span class='hs-comment'>-- non-empty. Subject to array fusion.</span>
<a name="line-399"></a><span class='hs-definition'>last</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span>
<a name="line-400"></a><span class='hs-definition'>last</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>emptyError</span> <span class='hs-str'>"last"</span>
<a name="line-401"></a><span class='hs-definition'>last</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ts</span>
<a name="line-402"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>go</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t'</span> <span class='hs-varid'>ts'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span> <span class='hs-varid'>t'</span> <span class='hs-varid'>ts'</span>
<a name="line-403"></a> <span class='hs-varid'>go</span> <span class='hs-varid'>t'</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>last</span> <span class='hs-varid'>t'</span>
<a name="line-404"></a><span class='hs-comment'>{-# INLINE [1] last #-}</span>
<a name="line-405"></a>
<a name="line-406"></a><span class='hs-comment'>{-# RULES
<a name="line-407"></a>"LAZY TEXT last -> fused" [~1] forall t.
<a name="line-408"></a> last t = S.last (stream t)
<a name="line-409"></a>"LAZY TEXT last -> unfused" [1] forall t.
<a name="line-410"></a> S.last (stream t) = last t
<a name="line-411"></a> #-}</span>
<a name="line-412"></a>
<a name="line-413"></a><a name="length"></a><span class='hs-comment'>-- | /O(n)/ Returns the number of characters in a 'Text'.</span>
<a name="line-414"></a><span class='hs-comment'>-- Subject to fusion.</span>
<a name="line-415"></a><span class='hs-definition'>length</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int64</span>
<a name="line-416"></a><span class='hs-definition'>length</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldlChunks</span> <span class='hs-varid'>go</span> <span class='hs-num'>0</span>
<a name="line-417"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>go</span> <span class='hs-varid'>l</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>l</span> <span class='hs-varop'>+</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-418"></a><span class='hs-comment'>{-# INLINE [1] length #-}</span>
<a name="line-419"></a>
<a name="line-420"></a><span class='hs-comment'>{-# RULES
<a name="line-421"></a>"LAZY TEXT length -> fused" [~1] forall t.
<a name="line-422"></a> length t = S.length (stream t)
<a name="line-423"></a>"LAZY TEXT length -> unfused" [1] forall t.
<a name="line-424"></a> S.length (stream t) = length t
<a name="line-425"></a> #-}</span>
<a name="line-426"></a>
<a name="line-427"></a><a name="compareLength"></a><span class='hs-comment'>-- | /O(n)/ Compare the count of characters in a 'Text' to a number.</span>
<a name="line-428"></a><span class='hs-comment'>-- Subject to fusion.</span>
<a name="line-429"></a><span class='hs-comment'>--</span>
<a name="line-430"></a><span class='hs-comment'>-- This function gives the same answer as comparing against the result</span>
<a name="line-431"></a><span class='hs-comment'>-- of 'length', but can short circuit if the count of characters is</span>
<a name="line-432"></a><span class='hs-comment'>-- greater than the number, and hence be more efficient.</span>
<a name="line-433"></a><span class='hs-definition'>compareLength</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int64</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ordering</span>
<a name="line-434"></a><span class='hs-definition'>compareLength</span> <span class='hs-varid'>t</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>compareLengthI</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varid'>n</span>
<a name="line-435"></a><span class='hs-comment'>{-# INLINE [1] compareLength #-}</span>
<a name="line-436"></a>
<a name="line-437"></a><span class='hs-comment'>-- We don't apply those otherwise appealing length-to-compareLength</span>
<a name="line-438"></a><span class='hs-comment'>-- rewrite rules here, because they can change the strictness</span>
<a name="line-439"></a><span class='hs-comment'>-- properties of code.</span>
<a name="line-440"></a>
<a name="line-441"></a><a name="map"></a><span class='hs-comment'>-- | /O(n)/ 'map' @f@ @t@ is the 'Text' obtained by applying @f@ to</span>
<a name="line-442"></a><span class='hs-comment'>-- each element of @t@. Subject to array fusion.</span>
<a name="line-443"></a><span class='hs-definition'>map</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-444"></a><span class='hs-definition'>map</span> <span class='hs-varid'>f</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unstream</span> <span class='hs-layout'>(</span><span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>map</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-445"></a><span class='hs-comment'>{-# INLINE [1] map #-}</span>
<a name="line-446"></a>
<a name="line-447"></a><a name="intercalate"></a><span class='hs-comment'>-- | /O(n)/ The 'intercalate' function takes a 'Text' and a list of</span>
<a name="line-448"></a><span class='hs-comment'>-- 'Text's and concatenates the list after interspersing the first</span>
<a name="line-449"></a><span class='hs-comment'>-- argument between each element of the list.</span>
<a name="line-450"></a><span class='hs-definition'>intercalate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-451"></a><span class='hs-definition'>intercalate</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concat</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-conid'>U</span><span class='hs-varop'>.</span><span class='hs-varid'>intersperse</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-452"></a><span class='hs-comment'>{-# INLINE intercalate #-}</span>
<a name="line-453"></a>
<a name="line-454"></a><a name="intersperse"></a><span class='hs-comment'>-- | /O(n)/ The 'intersperse' function takes a character and places it</span>
<a name="line-455"></a><span class='hs-comment'>-- between the characters of a 'Text'. Subject to array fusion.</span>
<a name="line-456"></a><span class='hs-definition'>intersperse</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-457"></a><span class='hs-definition'>intersperse</span> <span class='hs-varid'>c</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unstream</span> <span class='hs-layout'>(</span><span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>intersperse</span> <span class='hs-varid'>c</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-458"></a><span class='hs-comment'>{-# INLINE intersperse #-}</span>
<a name="line-459"></a>
<a name="line-460"></a><a name="justifyLeft"></a><span class='hs-comment'>-- | /O(n)/ Left-justify a string to the given length, using the</span>
<a name="line-461"></a><span class='hs-comment'>-- specified fill character on the right. Subject to fusion. Examples:</span>
<a name="line-462"></a><span class='hs-comment'>--</span>
<a name="line-463"></a><span class='hs-comment'>-- > justifyLeft 7 'x' "foo" == "fooxxxx"</span>
<a name="line-464"></a><span class='hs-comment'>-- > justifyLeft 3 'x' "foobar" == "foobar"</span>
<a name="line-465"></a><span class='hs-definition'>justifyLeft</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int64</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-466"></a><span class='hs-definition'>justifyLeft</span> <span class='hs-varid'>k</span> <span class='hs-varid'>c</span> <span class='hs-varid'>t</span>
<a name="line-467"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>len</span> <span class='hs-varop'>>=</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>t</span>
<a name="line-468"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>t</span> <span class='hs-varop'>`append`</span> <span class='hs-varid'>replicateChar</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span><span class='hs-comment'>-</span><span class='hs-varid'>len</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span>
<a name="line-469"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>length</span> <span class='hs-varid'>t</span>
<a name="line-470"></a><span class='hs-comment'>{-# INLINE [1] justifyLeft #-}</span>
<a name="line-471"></a>
<a name="line-472"></a><span class='hs-comment'>{-# RULES
<a name="line-473"></a>"LAZY TEXT justifyLeft -> fused" [~1] forall k c t.
<a name="line-474"></a> justifyLeft k c t = unstream (S.justifyLeftI k c (stream t))
<a name="line-475"></a>"LAZY TEXT justifyLeft -> unfused" [1] forall k c t.
<a name="line-476"></a> unstream (S.justifyLeftI k c (stream t)) = justifyLeft k c t
<a name="line-477"></a> #-}</span>
<a name="line-478"></a>
<a name="line-479"></a><a name="justifyRight"></a><span class='hs-comment'>-- | /O(n)/ Right-justify a string to the given length, using the</span>
<a name="line-480"></a><span class='hs-comment'>-- specified fill character on the left. Examples:</span>
<a name="line-481"></a><span class='hs-comment'>--</span>
<a name="line-482"></a><span class='hs-comment'>-- > justifyRight 7 'x' "bar" == "xxxxbar"</span>
<a name="line-483"></a><span class='hs-comment'>-- > justifyRight 3 'x' "foobar" == "foobar"</span>
<a name="line-484"></a><span class='hs-definition'>justifyRight</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int64</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-485"></a><span class='hs-definition'>justifyRight</span> <span class='hs-varid'>k</span> <span class='hs-varid'>c</span> <span class='hs-varid'>t</span>
<a name="line-486"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>len</span> <span class='hs-varop'>>=</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>t</span>
<a name="line-487"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>replicateChar</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span><span class='hs-comment'>-</span><span class='hs-varid'>len</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-varop'>`append`</span> <span class='hs-varid'>t</span>
<a name="line-488"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>length</span> <span class='hs-varid'>t</span>
<a name="line-489"></a><span class='hs-comment'>{-# INLINE justifyRight #-}</span>
<a name="line-490"></a>
<a name="line-491"></a><a name="center"></a><span class='hs-comment'>-- | /O(n)/ Center a string to the given length, using the</span>
<a name="line-492"></a><span class='hs-comment'>-- specified fill character on either side. Examples:</span>
<a name="line-493"></a><span class='hs-comment'>--</span>
<a name="line-494"></a><span class='hs-comment'>-- > center 8 'x' "HS" = "xxxHSxxx"</span>
<a name="line-495"></a><span class='hs-definition'>center</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int64</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-496"></a><span class='hs-definition'>center</span> <span class='hs-varid'>k</span> <span class='hs-varid'>c</span> <span class='hs-varid'>t</span>
<a name="line-497"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>len</span> <span class='hs-varop'>>=</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>t</span>
<a name="line-498"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>replicateChar</span> <span class='hs-varid'>l</span> <span class='hs-varid'>c</span> <span class='hs-varop'>`append`</span> <span class='hs-varid'>t</span> <span class='hs-varop'>`append`</span> <span class='hs-varid'>replicateChar</span> <span class='hs-varid'>r</span> <span class='hs-varid'>c</span>
<a name="line-499"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>length</span> <span class='hs-varid'>t</span>
<a name="line-500"></a> <span class='hs-varid'>d</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>k</span> <span class='hs-comment'>-</span> <span class='hs-varid'>len</span>
<a name="line-501"></a> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>d</span> <span class='hs-varop'>`div`</span> <span class='hs-num'>2</span>
<a name="line-502"></a> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>d</span> <span class='hs-comment'>-</span> <span class='hs-varid'>r</span>
<a name="line-503"></a><span class='hs-comment'>{-# INLINE center #-}</span>
<a name="line-504"></a>
<a name="line-505"></a><a name="transpose"></a><span class='hs-comment'>-- | /O(n)/ The 'transpose' function transposes the rows and columns</span>
<a name="line-506"></a><span class='hs-comment'>-- of its 'Text' argument. Note that this function uses 'pack',</span>
<a name="line-507"></a><span class='hs-comment'>-- 'unpack', and the list version of transpose, and is thus not very</span>
<a name="line-508"></a><span class='hs-comment'>-- efficient.</span>
<a name="line-509"></a><span class='hs-definition'>transpose</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span>
<a name="line-510"></a><span class='hs-definition'>transpose</span> <span class='hs-varid'>ts</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>ss</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Chunk</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span> <span class='hs-varid'>ss</span><span class='hs-layout'>)</span> <span class='hs-conid'>Empty</span><span class='hs-layout'>)</span>
<a name="line-511"></a> <span class='hs-layout'>(</span><span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-varid'>transpose</span> <span class='hs-layout'>(</span><span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-varid'>map</span> <span class='hs-varid'>unpack</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-512"></a><span class='hs-comment'>-- TODO: make this fast</span>
<a name="line-513"></a>
<a name="line-514"></a><a name="reverse"></a><span class='hs-comment'>-- | /O(n)/ 'reverse' @t@ returns the elements of @t@ in reverse order.</span>
<a name="line-515"></a><span class='hs-definition'>reverse</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-516"></a><span class='hs-definition'>reverse</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>rev</span> <span class='hs-conid'>Empty</span>
<a name="line-517"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>rev</span> <span class='hs-varid'>a</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span>
<a name="line-518"></a> <span class='hs-varid'>rev</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>rev</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>reverse</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>ts</span>
<a name="line-519"></a>
<a name="line-520"></a><a name="replace"></a><span class='hs-comment'>-- | /O(m+n)/ Replace every occurrence of one substring with another.</span>
<a name="line-521"></a><span class='hs-comment'>--</span>
<a name="line-522"></a><span class='hs-comment'>-- In (unlikely) bad cases, this function's time complexity degrades</span>
<a name="line-523"></a><span class='hs-comment'>-- towards /O(n*m)/.</span>
<a name="line-524"></a><span class='hs-definition'>replace</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-comment'>-- ^ Text to search for</span>
<a name="line-525"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-comment'>-- ^ Replacement text</span>
<a name="line-526"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-comment'>-- ^ Input text</span>
<a name="line-527"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-528"></a><span class='hs-definition'>replace</span> <span class='hs-varid'>s</span> <span class='hs-varid'>d</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>intercalate</span> <span class='hs-varid'>d</span> <span class='hs-varop'>.</span> <span class='hs-varid'>split</span> <span class='hs-varid'>s</span>
<a name="line-529"></a><span class='hs-comment'>{-# INLINE replace #-}</span>
<a name="line-530"></a>
<a name="line-531"></a><span class='hs-comment'>-- ----------------------------------------------------------------------------</span>
<a name="line-532"></a><span class='hs-comment'>-- ** Case conversions (folds)</span>
<a name="line-533"></a>
<a name="line-534"></a><span class='hs-comment'>-- $case</span>
<a name="line-535"></a><span class='hs-comment'>--</span>
<a name="line-536"></a><span class='hs-comment'>-- With Unicode text, it is incorrect to use combinators like @map</span>
<a name="line-537"></a><span class='hs-comment'>-- toUpper@ to case convert each character of a string individually.</span>
<a name="line-538"></a><span class='hs-comment'>-- Instead, use the whole-string case conversion functions from this</span>
<a name="line-539"></a><span class='hs-comment'>-- module. For correctness in different writing systems, these</span>
<a name="line-540"></a><span class='hs-comment'>-- functions may map one input character to two or three output</span>
<a name="line-541"></a><span class='hs-comment'>-- characters.</span>
<a name="line-542"></a>
<a name="line-543"></a><a name="toCaseFold"></a><span class='hs-comment'>-- | /O(n)/ Convert a string to folded case. This function is mainly</span>
<a name="line-544"></a><span class='hs-comment'>-- useful for performing caseless (or case insensitive) string</span>
<a name="line-545"></a><span class='hs-comment'>-- comparisons.</span>
<a name="line-546"></a><span class='hs-comment'>--</span>
<a name="line-547"></a><span class='hs-comment'>-- A string @x@ is a caseless match for a string @y@ if and only if:</span>
<a name="line-548"></a><span class='hs-comment'>--</span>
<a name="line-549"></a><span class='hs-comment'>-- @toCaseFold x == toCaseFold y@</span>
<a name="line-550"></a><span class='hs-comment'>--</span>
<a name="line-551"></a><span class='hs-comment'>-- The result string may be longer than the input string, and may</span>
<a name="line-552"></a><span class='hs-comment'>-- differ from applying 'toLower' to the input string. For instance,</span>
<a name="line-553"></a><span class='hs-comment'>-- the Armenian small ligature men now (U+FB13) is case folded to the</span>
<a name="line-554"></a><span class='hs-comment'>-- bigram men now (U+0574 U+0576), while the micro sign (U+00B5) is</span>
<a name="line-555"></a><span class='hs-comment'>-- case folded to the Greek small letter letter mu (U+03BC) instead of</span>
<a name="line-556"></a><span class='hs-comment'>-- itself.</span>
<a name="line-557"></a><span class='hs-definition'>toCaseFold</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-558"></a><span class='hs-definition'>toCaseFold</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unstream</span> <span class='hs-layout'>(</span><span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>toCaseFold</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-559"></a><span class='hs-comment'>{-# INLINE [0] toCaseFold #-}</span>
<a name="line-560"></a>
<a name="line-561"></a><a name="toLower"></a><span class='hs-comment'>-- | /O(n)/ Convert a string to lower case, using simple case</span>
<a name="line-562"></a><span class='hs-comment'>-- conversion. The result string may be longer than the input string.</span>
<a name="line-563"></a><span class='hs-comment'>-- For instance, the Latin capital letter I with dot above (U+0130)</span>
<a name="line-564"></a><span class='hs-comment'>-- maps to the sequence Latin small letter i (U+0069) followed by</span>
<a name="line-565"></a><span class='hs-comment'>-- combining dot above (U+0307).</span>
<a name="line-566"></a><span class='hs-definition'>toLower</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-567"></a><span class='hs-definition'>toLower</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unstream</span> <span class='hs-layout'>(</span><span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>toLower</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-568"></a><span class='hs-comment'>{-# INLINE toLower #-}</span>
<a name="line-569"></a>
<a name="line-570"></a><a name="toUpper"></a><span class='hs-comment'>-- | /O(n)/ Convert a string to upper case, using simple case</span>
<a name="line-571"></a><span class='hs-comment'>-- conversion. The result string may be longer than the input string.</span>
<a name="line-572"></a><span class='hs-comment'>-- For instance, the German eszett (U+00DF) maps to the two-letter</span>
<a name="line-573"></a><span class='hs-comment'>-- sequence SS.</span>
<a name="line-574"></a><span class='hs-definition'>toUpper</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-575"></a><span class='hs-definition'>toUpper</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unstream</span> <span class='hs-layout'>(</span><span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>toUpper</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-576"></a><span class='hs-comment'>{-# INLINE toUpper #-}</span>
<a name="line-577"></a>
<a name="line-578"></a><a name="foldl"></a><span class='hs-comment'>-- | /O(n)/ 'foldl', applied to a binary operator, a starting value</span>
<a name="line-579"></a><span class='hs-comment'>-- (typically the left-identity of the operator), and a 'Text',</span>
<a name="line-580"></a><span class='hs-comment'>-- reduces the 'Text' using the binary operator, from left to right.</span>
<a name="line-581"></a><span class='hs-comment'>-- Subject to array fusion.</span>
<a name="line-582"></a><span class='hs-definition'>foldl</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-583"></a><span class='hs-definition'>foldl</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>foldl</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-584"></a><span class='hs-comment'>{-# INLINE foldl #-}</span>
<a name="line-585"></a>
<a name="line-586"></a><a name="foldl'"></a><span class='hs-comment'>-- | /O(n)/ A strict version of 'foldl'.</span>
<a name="line-587"></a><span class='hs-comment'>-- Subject to array fusion.</span>
<a name="line-588"></a><span class='hs-definition'>foldl'</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-589"></a><span class='hs-definition'>foldl'</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>foldl'</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-590"></a><span class='hs-comment'>{-# INLINE foldl' #-}</span>
<a name="line-591"></a>
<a name="line-592"></a><a name="foldl1"></a><span class='hs-comment'>-- | /O(n)/ A variant of 'foldl' that has no starting value argument,</span>
<a name="line-593"></a><span class='hs-comment'>-- and thus must be applied to a non-empty 'Text'. Subject to array</span>
<a name="line-594"></a><span class='hs-comment'>-- fusion.</span>
<a name="line-595"></a><span class='hs-definition'>foldl1</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span>
<a name="line-596"></a><span class='hs-definition'>foldl1</span> <span class='hs-varid'>f</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>foldl1</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-597"></a><span class='hs-comment'>{-# INLINE foldl1 #-}</span>
<a name="line-598"></a>
<a name="line-599"></a><a name="foldl1'"></a><span class='hs-comment'>-- | /O(n)/ A strict version of 'foldl1'.</span>
<a name="line-600"></a><span class='hs-comment'>-- Subject to array fusion.</span>
<a name="line-601"></a><span class='hs-definition'>foldl1'</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span>
<a name="line-602"></a><span class='hs-definition'>foldl1'</span> <span class='hs-varid'>f</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>foldl1'</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-603"></a><span class='hs-comment'>{-# INLINE foldl1' #-}</span>
<a name="line-604"></a>
<a name="line-605"></a><a name="foldr"></a><span class='hs-comment'>-- | /O(n)/ 'foldr', applied to a binary operator, a starting value</span>
<a name="line-606"></a><span class='hs-comment'>-- (typically the right-identity of the operator), and a 'Text',</span>
<a name="line-607"></a><span class='hs-comment'>-- reduces the 'Text' using the binary operator, from right to left.</span>
<a name="line-608"></a><span class='hs-comment'>-- Subject to array fusion.</span>
<a name="line-609"></a><span class='hs-definition'>foldr</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-610"></a><span class='hs-definition'>foldr</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>foldr</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-611"></a><span class='hs-comment'>{-# INLINE foldr #-}</span>
<a name="line-612"></a>
<a name="line-613"></a><a name="foldr1"></a><span class='hs-comment'>-- | /O(n)/ A variant of 'foldr' that has no starting value argument, and</span>
<a name="line-614"></a><span class='hs-comment'>-- thust must be applied to a non-empty 'Text'. Subject to array</span>
<a name="line-615"></a><span class='hs-comment'>-- fusion.</span>
<a name="line-616"></a><span class='hs-definition'>foldr1</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span>
<a name="line-617"></a><span class='hs-definition'>foldr1</span> <span class='hs-varid'>f</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>foldr1</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-618"></a><span class='hs-comment'>{-# INLINE foldr1 #-}</span>
<a name="line-619"></a>
<a name="line-620"></a><a name="concat"></a><span class='hs-comment'>-- | /O(n)/ Concatenate a list of 'Text's.</span>
<a name="line-621"></a><span class='hs-definition'>concat</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-622"></a><span class='hs-definition'>concat</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>to</span>
<a name="line-623"></a> <span class='hs-keyword'>where</span>
<a name="line-624"></a> <span class='hs-varid'>go</span> <span class='hs-conid'>Empty</span> <span class='hs-varid'>css</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>to</span> <span class='hs-varid'>css</span>
<a name="line-625"></a> <span class='hs-varid'>go</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>c</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span> <span class='hs-varid'>css</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Chunk</span> <span class='hs-varid'>c</span> <span class='hs-layout'>(</span><span class='hs-varid'>go</span> <span class='hs-varid'>cs</span> <span class='hs-varid'>css</span><span class='hs-layout'>)</span>
<a name="line-626"></a> <span class='hs-varid'>to</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Empty</span>
<a name="line-627"></a> <span class='hs-varid'>to</span> <span class='hs-layout'>(</span><span class='hs-varid'>cs</span><span class='hs-conop'>:</span><span class='hs-varid'>css</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span> <span class='hs-varid'>cs</span> <span class='hs-varid'>css</span>
<a name="line-628"></a><span class='hs-comment'>{-# INLINE concat #-}</span>
<a name="line-629"></a>
<a name="line-630"></a><a name="concatMap"></a><span class='hs-comment'>-- | /O(n)/ Map a function over a 'Text' that results in a 'Text', and</span>
<a name="line-631"></a><span class='hs-comment'>-- concatenate the results.</span>
<a name="line-632"></a><span class='hs-definition'>concatMap</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-633"></a><span class='hs-definition'>concatMap</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concat</span> <span class='hs-varop'>.</span> <span class='hs-varid'>foldr</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conop'>:</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-conid'>[]</span>
<a name="line-634"></a><span class='hs-comment'>{-# INLINE concatMap #-}</span>
<a name="line-635"></a>
<a name="line-636"></a><a name="any"></a><span class='hs-comment'>-- | /O(n)/ 'any' @p@ @t@ determines whether any character in the</span>
<a name="line-637"></a><span class='hs-comment'>-- 'Text' @t@ satisifes the predicate @p@. Subject to array fusion.</span>
<a name="line-638"></a><span class='hs-definition'>any</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</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-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-639"></a><span class='hs-definition'>any</span> <span class='hs-varid'>p</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>any</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-640"></a><span class='hs-comment'>{-# INLINE any #-}</span>
<a name="line-641"></a>
<a name="line-642"></a><a name="all"></a><span class='hs-comment'>-- | /O(n)/ 'all' @p@ @t@ determines whether all characters in the</span>
<a name="line-643"></a><span class='hs-comment'>-- 'Text' @t@ satisify the predicate @p@. Subject to array fusion.</span>
<a name="line-644"></a><span class='hs-definition'>all</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</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-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-645"></a><span class='hs-definition'>all</span> <span class='hs-varid'>p</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>all</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-646"></a><span class='hs-comment'>{-# INLINE all #-}</span>
<a name="line-647"></a>
<a name="line-648"></a><a name="maximum"></a><span class='hs-comment'>-- | /O(n)/ 'maximum' returns the maximum value from a 'Text', which</span>
<a name="line-649"></a><span class='hs-comment'>-- must be non-empty. Subject to array fusion.</span>
<a name="line-650"></a><span class='hs-definition'>maximum</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span>
<a name="line-651"></a><span class='hs-definition'>maximum</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>maximum</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-652"></a><span class='hs-comment'>{-# INLINE maximum #-}</span>
<a name="line-653"></a>
<a name="line-654"></a><a name="minimum"></a><span class='hs-comment'>-- | /O(n)/ 'minimum' returns the minimum value from a 'Text', which</span>
<a name="line-655"></a><span class='hs-comment'>-- must be non-empty. Subject to array fusion.</span>
<a name="line-656"></a><span class='hs-definition'>minimum</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span>
<a name="line-657"></a><span class='hs-definition'>minimum</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>minimum</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-658"></a><span class='hs-comment'>{-# INLINE minimum #-}</span>
<a name="line-659"></a>
<a name="line-660"></a><a name="scanl"></a><span class='hs-comment'>-- | /O(n)/ 'scanl' is similar to 'foldl', but returns a list of</span>
<a name="line-661"></a><span class='hs-comment'>-- successive reduced values from the left. This function is subject</span>
<a name="line-662"></a><span class='hs-comment'>-- to array fusion.</span>
<a name="line-663"></a><span class='hs-comment'>--</span>
<a name="line-664"></a><span class='hs-comment'>-- > scanl f z [x1, x2, ...] == [z, z `f` x1, (z `f` x1) `f` x2, ...]</span>
<a name="line-665"></a><span class='hs-comment'>--</span>
<a name="line-666"></a><span class='hs-comment'>-- Note that</span>
<a name="line-667"></a><span class='hs-comment'>--</span>
<a name="line-668"></a><span class='hs-comment'>-- > last (scanl f z xs) == foldl f z xs.</span>
<a name="line-669"></a><span class='hs-definition'>scanl</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-670"></a><span class='hs-definition'>scanl</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unstream</span> <span class='hs-layout'>(</span><span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>scanl</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-671"></a><span class='hs-comment'>{-# INLINE scanl #-}</span>
<a name="line-672"></a>
<a name="line-673"></a><a name="scanl1"></a><span class='hs-comment'>-- | /O(n)/ 'scanl1' is a variant of 'scanl' that has no starting</span>
<a name="line-674"></a><span class='hs-comment'>-- value argument. This function is subject to array fusion.</span>
<a name="line-675"></a><span class='hs-comment'>--</span>
<a name="line-676"></a><span class='hs-comment'>-- > scanl1 f [x1, x2, ...] == [x1, x1 `f` x2, ...]</span>
<a name="line-677"></a><span class='hs-definition'>scanl1</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-678"></a><span class='hs-definition'>scanl1</span> <span class='hs-varid'>f</span> <span class='hs-varid'>t0</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>uncons</span> <span class='hs-varid'>t0</span> <span class='hs-keyword'>of</span>
<a name="line-679"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>empty</span>
<a name="line-680"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>t</span><span class='hs-layout'>,</span><span class='hs-varid'>ts</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>scanl</span> <span class='hs-varid'>f</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ts</span>
<a name="line-681"></a><span class='hs-comment'>{-# INLINE scanl1 #-}</span>
<a name="line-682"></a>
<a name="line-683"></a><a name="scanr"></a><span class='hs-comment'>-- | /O(n)/ 'scanr' is the right-to-left dual of 'scanl'.</span>
<a name="line-684"></a><span class='hs-comment'>--</span>
<a name="line-685"></a><span class='hs-comment'>-- > scanr f v == reverse . scanl (flip f) v . reverse</span>
<a name="line-686"></a><span class='hs-definition'>scanr</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-687"></a><span class='hs-definition'>scanr</span> <span class='hs-varid'>f</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>reverse</span> <span class='hs-varop'>.</span> <span class='hs-varid'>scanl</span> <span class='hs-layout'>(</span><span class='hs-varid'>flip</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>v</span> <span class='hs-varop'>.</span> <span class='hs-varid'>reverse</span>
<a name="line-688"></a>
<a name="line-689"></a><a name="scanr1"></a><span class='hs-comment'>-- | /O(n)/ 'scanr1' is a variant of 'scanr' that has no starting</span>
<a name="line-690"></a><span class='hs-comment'>-- value argument.</span>
<a name="line-691"></a><span class='hs-definition'>scanr1</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-692"></a><span class='hs-definition'>scanr1</span> <span class='hs-varid'>f</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>null</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>empty</span>
<a name="line-693"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>scanr</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>last</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>init</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-694"></a>
<a name="line-695"></a><a name="mapAccumL"></a><span class='hs-comment'>-- | /O(n)/ Like a combination of 'map' and 'foldl''. Applies a</span>
<a name="line-696"></a><span class='hs-comment'>-- function to each element of a 'Text', passing an accumulating</span>
<a name="line-697"></a><span class='hs-comment'>-- parameter from left to right, and returns a final 'Text'.</span>
<a name="line-698"></a><span class='hs-definition'>mapAccumL</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-conid'>Char</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Text</span><span class='hs-layout'>)</span>
<a name="line-699"></a><span class='hs-definition'>mapAccumL</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span>
<a name="line-700"></a> <span class='hs-keyword'>where</span>
<a name="line-701"></a> <span class='hs-varid'>go</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>c</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>z''</span><span class='hs-layout'>,</span> <span class='hs-conid'>Chunk</span> <span class='hs-varid'>c'</span> <span class='hs-varid'>cs'</span><span class='hs-layout'>)</span>
<a name="line-702"></a> <span class='hs-keyword'>where</span> <span class='hs-layout'>(</span><span class='hs-varid'>z'</span><span class='hs-layout'>,</span> <span class='hs-varid'>c'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>mapAccumL</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-varid'>c</span>
<a name="line-703"></a> <span class='hs-layout'>(</span><span class='hs-varid'>z''</span><span class='hs-layout'>,</span> <span class='hs-varid'>cs'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span> <span class='hs-varid'>z'</span> <span class='hs-varid'>cs</span>
<a name="line-704"></a> <span class='hs-varid'>go</span> <span class='hs-varid'>z</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>z</span><span class='hs-layout'>,</span> <span class='hs-conid'>Empty</span><span class='hs-layout'>)</span>
<a name="line-705"></a><span class='hs-comment'>{-# INLINE mapAccumL #-}</span>
<a name="line-706"></a>
<a name="line-707"></a><a name="mapAccumR"></a><span class='hs-comment'>-- | The 'mapAccumR' function behaves like a combination of 'map' and</span>
<a name="line-708"></a><span class='hs-comment'>-- a strict 'foldr'; it applies a function to each element of a</span>
<a name="line-709"></a><span class='hs-comment'>-- 'Text', passing an accumulating parameter from right to left, and</span>
<a name="line-710"></a><span class='hs-comment'>-- returning a final value of this accumulator together with the new</span>
<a name="line-711"></a><span class='hs-comment'>-- 'Text'.</span>
<a name="line-712"></a><span class='hs-definition'>mapAccumR</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-conid'>Char</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Text</span><span class='hs-layout'>)</span>
<a name="line-713"></a><span class='hs-definition'>mapAccumR</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span>
<a name="line-714"></a> <span class='hs-keyword'>where</span>
<a name="line-715"></a> <span class='hs-varid'>go</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>c</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>z''</span><span class='hs-layout'>,</span> <span class='hs-conid'>Chunk</span> <span class='hs-varid'>c'</span> <span class='hs-varid'>cs'</span><span class='hs-layout'>)</span>
<a name="line-716"></a> <span class='hs-keyword'>where</span> <span class='hs-layout'>(</span><span class='hs-varid'>z''</span><span class='hs-layout'>,</span> <span class='hs-varid'>c'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>mapAccumR</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z'</span> <span class='hs-varid'>c</span>
<a name="line-717"></a> <span class='hs-layout'>(</span><span class='hs-varid'>z'</span><span class='hs-layout'>,</span> <span class='hs-varid'>cs'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span> <span class='hs-varid'>z</span> <span class='hs-varid'>cs</span>
<a name="line-718"></a> <span class='hs-varid'>go</span> <span class='hs-varid'>z</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>z</span><span class='hs-layout'>,</span> <span class='hs-conid'>Empty</span><span class='hs-layout'>)</span>
<a name="line-719"></a><span class='hs-comment'>{-# INLINE mapAccumR #-}</span>
<a name="line-720"></a>
<a name="line-721"></a><a name="replicate"></a><span class='hs-comment'>-- | /O(n*m)/ 'replicate' @n@ @t@ is a 'Text' consisting of the input</span>
<a name="line-722"></a><span class='hs-comment'>-- @t@ repeated @n@ times.</span>
<a name="line-723"></a><span class='hs-definition'>replicate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int64</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-724"></a><span class='hs-definition'>replicate</span> <span class='hs-varid'>n</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concat</span> <span class='hs-layout'>(</span><span class='hs-varid'>rep</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span>
<a name="line-725"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>rep</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>i</span> <span class='hs-varop'>>=</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-726"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>t</span> <span class='hs-conop'>:</span> <span class='hs-varid'>rep</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span>
<a name="line-727"></a><span class='hs-comment'>{-# INLINE replicate #-}</span>
<a name="line-728"></a>
<a name="line-729"></a><a name="replicateChar"></a><span class='hs-comment'>-- | /O(n)/ 'replicateChar' @n@ @c@ is a 'Text' of length @n@ with @c@ the</span>
<a name="line-730"></a><span class='hs-comment'>-- value of every element. Subject to fusion.</span>
<a name="line-731"></a><span class='hs-definition'>replicateChar</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int64</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-732"></a><span class='hs-definition'>replicateChar</span> <span class='hs-varid'>n</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unstream</span> <span class='hs-layout'>(</span><span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>replicateCharI</span> <span class='hs-varid'>n</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-733"></a><span class='hs-comment'>{-# INLINE replicateChar #-}</span>
<a name="line-734"></a>
<a name="line-735"></a><span class='hs-comment'>{-# RULES
<a name="line-736"></a>"LAZY TEXT replicate/singleton -> replicateChar" [~1] forall n c.
<a name="line-737"></a> replicate n (singleton c) = replicateChar n c
<a name="line-738"></a> #-}</span>
<a name="line-739"></a>
<a name="line-740"></a><a name="unfoldr"></a><span class='hs-comment'>-- | /O(n)/, where @n@ is the length of the result. The 'unfoldr'</span>
<a name="line-741"></a><span class='hs-comment'>-- function is analogous to the List 'L.unfoldr'. 'unfoldr' builds a</span>
<a name="line-742"></a><span class='hs-comment'>-- 'Text' from a seed value. The function takes the element and</span>
<a name="line-743"></a><span class='hs-comment'>-- returns 'Nothing' if it is done producing the 'Text', otherwise</span>
<a name="line-744"></a><span class='hs-comment'>-- 'Just' @(a,b)@. In this case, @a@ is the next 'Char' in the</span>
<a name="line-745"></a><span class='hs-comment'>-- string, and @b@ is the seed value for further production.</span>
<a name="line-746"></a><span class='hs-definition'>unfoldr</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</span><span class='hs-layout'>,</span><span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-747"></a><span class='hs-definition'>unfoldr</span> <span class='hs-varid'>f</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unstream</span> <span class='hs-layout'>(</span><span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>unfoldr</span> <span class='hs-varid'>f</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-748"></a><span class='hs-comment'>{-# INLINE unfoldr #-}</span>
<a name="line-749"></a>
<a name="line-750"></a><a name="unfoldrN"></a><span class='hs-comment'>-- | /O(n)/ Like 'unfoldr', 'unfoldrN' builds a 'Text' from a seed</span>
<a name="line-751"></a><span class='hs-comment'>-- value. However, the length of the result should be limited by the</span>
<a name="line-752"></a><span class='hs-comment'>-- first argument to 'unfoldrN'. This function is more efficient than</span>
<a name="line-753"></a><span class='hs-comment'>-- 'unfoldr' when the maximum length of the result is known and</span>
<a name="line-754"></a><span class='hs-comment'>-- correct, otherwise its performance is similar to 'unfoldr'.</span>
<a name="line-755"></a><span class='hs-definition'>unfoldrN</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int64</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</span><span class='hs-layout'>,</span><span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-756"></a><span class='hs-definition'>unfoldrN</span> <span class='hs-varid'>n</span> <span class='hs-varid'>f</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unstream</span> <span class='hs-layout'>(</span><span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>unfoldrN</span> <span class='hs-varid'>n</span> <span class='hs-varid'>f</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-757"></a><span class='hs-comment'>{-# INLINE unfoldrN #-}</span>
<a name="line-758"></a>
<a name="line-759"></a><a name="take"></a><span class='hs-comment'>-- | /O(n)/ 'take' @n@, applied to a 'Text', returns the prefix of the</span>
<a name="line-760"></a><span class='hs-comment'>-- 'Text' of length @n@, or the 'Text' itself if @n@ is greater than</span>
<a name="line-761"></a><span class='hs-comment'>-- the length of the Text. Subject to fusion.</span>
<a name="line-762"></a><span class='hs-definition'>take</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int64</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-763"></a><span class='hs-definition'>take</span> <span class='hs-varid'>i</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>i</span> <span class='hs-varop'><=</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Empty</span>
<a name="line-764"></a><span class='hs-definition'>take</span> <span class='hs-varid'>i</span> <span class='hs-varid'>t0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>take'</span> <span class='hs-varid'>i</span> <span class='hs-varid'>t0</span>
<a name="line-765"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>take'</span> <span class='hs-num'>0</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Empty</span>
<a name="line-766"></a> <span class='hs-varid'>take'</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Empty</span>
<a name="line-767"></a> <span class='hs-varid'>take'</span> <span class='hs-varid'>n</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span>
<a name="line-768"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>n</span> <span class='hs-varop'><</span> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Chunk</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>take</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-conid'>Empty</span>
<a name="line-769"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-varid'>take'</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span> <span class='hs-comment'>-</span> <span class='hs-varid'>len</span><span class='hs-layout'>)</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span>
<a name="line-770"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-771"></a><span class='hs-comment'>{-# INLINE [1] take #-}</span>
<a name="line-772"></a>
<a name="line-773"></a><span class='hs-comment'>{-# RULES
<a name="line-774"></a>"LAZY TEXT take -> fused" [~1] forall n t.
<a name="line-775"></a> take n t = unstream (S.take n (stream t))
<a name="line-776"></a>"LAZY TEXT take -> unfused" [1] forall n t.
<a name="line-777"></a> unstream (S.take n (stream t)) = take n t
<a name="line-778"></a> #-}</span>
<a name="line-779"></a>
<a name="line-780"></a><a name="drop"></a><span class='hs-comment'>-- | /O(n)/ 'drop' @n@, applied to a 'Text', returns the suffix of the</span>
<a name="line-781"></a><span class='hs-comment'>-- 'Text' after the first @n@ characters, or the empty 'Text' if @n@</span>
<a name="line-782"></a><span class='hs-comment'>-- is greater than the length of the 'Text'. Subject to fusion.</span>
<a name="line-783"></a><span class='hs-definition'>drop</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int64</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-784"></a><span class='hs-definition'>drop</span> <span class='hs-varid'>i</span> <span class='hs-varid'>t0</span>
<a name="line-785"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>i</span> <span class='hs-varop'><=</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>t0</span>
<a name="line-786"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>drop'</span> <span class='hs-varid'>i</span> <span class='hs-varid'>t0</span>
<a name="line-787"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>drop'</span> <span class='hs-num'>0</span> <span class='hs-varid'>ts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ts</span>
<a name="line-788"></a> <span class='hs-varid'>drop'</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Empty</span>
<a name="line-789"></a> <span class='hs-varid'>drop'</span> <span class='hs-varid'>n</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span>
<a name="line-790"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>n</span> <span class='hs-varop'><</span> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Chunk</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>drop</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varid'>ts</span>
<a name="line-791"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>drop'</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span> <span class='hs-comment'>-</span> <span class='hs-varid'>len</span><span class='hs-layout'>)</span> <span class='hs-varid'>ts</span>
<a name="line-792"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-793"></a><span class='hs-comment'>{-# INLINE [1] drop #-}</span>
<a name="line-794"></a>
<a name="line-795"></a><span class='hs-comment'>{-# RULES
<a name="line-796"></a>"LAZY TEXT drop -> fused" [~1] forall n t.
<a name="line-797"></a> drop n t = unstream (S.drop n (stream t))
<a name="line-798"></a>"LAZY TEXT drop -> unfused" [1] forall n t.
<a name="line-799"></a> unstream (S.drop n (stream t)) = drop n t
<a name="line-800"></a> #-}</span>
<a name="line-801"></a>
<a name="line-802"></a><a name="dropWords"></a><span class='hs-comment'>-- | /O(n)/ 'dropWords' @n@ returns the suffix with @n@ 'Word16'</span>
<a name="line-803"></a><span class='hs-comment'>-- values dropped, or the empty 'Text' if @n@ is greater than the</span>
<a name="line-804"></a><span class='hs-comment'>-- number of 'Word16' values present.</span>
<a name="line-805"></a><span class='hs-definition'>dropWords</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int64</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-806"></a><span class='hs-definition'>dropWords</span> <span class='hs-varid'>i</span> <span class='hs-varid'>t0</span>
<a name="line-807"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>i</span> <span class='hs-varop'><=</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>t0</span>
<a name="line-808"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>drop'</span> <span class='hs-varid'>i</span> <span class='hs-varid'>t0</span>
<a name="line-809"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>drop'</span> <span class='hs-num'>0</span> <span class='hs-varid'>ts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ts</span>
<a name="line-810"></a> <span class='hs-varid'>drop'</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Empty</span>
<a name="line-811"></a> <span class='hs-varid'>drop'</span> <span class='hs-varid'>n</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span> <span class='hs-varid'>arr</span> <span class='hs-varid'>off</span> <span class='hs-varid'>len</span><span class='hs-layout'>)</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span>
<a name="line-812"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>n</span> <span class='hs-varop'><</span> <span class='hs-varid'>len'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>chunk</span> <span class='hs-layout'>(</span><span class='hs-varid'>textP</span> <span class='hs-varid'>arr</span> <span class='hs-layout'>(</span><span class='hs-varid'>off</span><span class='hs-varop'>+</span><span class='hs-varid'>n'</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>len</span><span class='hs-comment'>-</span><span class='hs-varid'>n'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>ts</span>
<a name="line-813"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>drop'</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span> <span class='hs-comment'>-</span> <span class='hs-varid'>len'</span><span class='hs-layout'>)</span> <span class='hs-varid'>ts</span>
<a name="line-814"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>len'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>len</span>
<a name="line-815"></a> <span class='hs-varid'>n'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>n</span>
<a name="line-816"></a>
<a name="line-817"></a><a name="takeWhile"></a><span class='hs-comment'>-- | /O(n)/ 'takeWhile', applied to a predicate @p@ and a 'Text', returns</span>
<a name="line-818"></a><span class='hs-comment'>-- the longest prefix (possibly empty) of elements that satisfy @p@.</span>
<a name="line-819"></a><span class='hs-comment'>-- This function is subject to array fusion.</span>
<a name="line-820"></a><span class='hs-definition'>takeWhile</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</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-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-821"></a><span class='hs-definition'>takeWhile</span> <span class='hs-varid'>p</span> <span class='hs-varid'>t0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>takeWhile'</span> <span class='hs-varid'>t0</span>
<a name="line-822"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>takeWhile'</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Empty</span>
<a name="line-823"></a> <span class='hs-varid'>takeWhile'</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-824"></a> <span class='hs-keyword'>case</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>findIndex</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-varop'>.</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span> <span class='hs-keyword'>of</span>
<a name="line-825"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>n</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Chunk</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>take</span> <span class='hs-varid'>n</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-conid'>Empty</span>
<a name="line-826"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Empty</span>
<a name="line-827"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-varid'>takeWhile'</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span>
<a name="line-828"></a><span class='hs-comment'>{-# INLINE [1] takeWhile #-}</span>
<a name="line-829"></a>
<a name="line-830"></a><span class='hs-comment'>{-# RULES
<a name="line-831"></a>"LAZY TEXT takeWhile -> fused" [~1] forall p t.
<a name="line-832"></a> takeWhile p t = unstream (S.takeWhile p (stream t))
<a name="line-833"></a>"LAZY TEXT takeWhile -> unfused" [1] forall p t.
<a name="line-834"></a> unstream (S.takeWhile p (stream t)) = takeWhile p t
<a name="line-835"></a> #-}</span>
<a name="line-836"></a>
<a name="line-837"></a><a name="dropWhile"></a><span class='hs-comment'>-- | /O(n)/ 'dropWhile' @p@ @t@ returns the suffix remaining after</span>
<a name="line-838"></a><span class='hs-comment'>-- 'takeWhile' @p@ @t@. This function is subject to array fusion.</span>
<a name="line-839"></a><span class='hs-definition'>dropWhile</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</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-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-840"></a><span class='hs-definition'>dropWhile</span> <span class='hs-varid'>p</span> <span class='hs-varid'>t0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dropWhile'</span> <span class='hs-varid'>t0</span>
<a name="line-841"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>dropWhile'</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Empty</span>
<a name="line-842"></a> <span class='hs-varid'>dropWhile'</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-843"></a> <span class='hs-keyword'>case</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>findIndex</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-varop'>.</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span> <span class='hs-keyword'>of</span>
<a name="line-844"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Chunk</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>drop</span> <span class='hs-varid'>n</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varid'>ts</span>
<a name="line-845"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>dropWhile'</span> <span class='hs-varid'>ts</span>
<a name="line-846"></a><span class='hs-comment'>{-# INLINE [1] dropWhile #-}</span>
<a name="line-847"></a>
<a name="line-848"></a><a name="dropWhileEnd"></a><span class='hs-comment'>{-# RULES
<a name="line-849"></a>"LAZY TEXT dropWhile -> fused" [~1] forall p t.
<a name="line-850"></a> dropWhile p t = unstream (S.dropWhile p (stream t))
<a name="line-851"></a>"LAZY TEXT dropWhile -> unfused" [1] forall p t.
<a name="line-852"></a> unstream (S.dropWhile p (stream t)) = dropWhile p t
<a name="line-853"></a> #-}</span>
<a name="line-854"></a><span class='hs-comment'>-- | /O(n)/ 'dropWhileEnd' @p@ @t@ returns the prefix remaining after</span>
<a name="line-855"></a><span class='hs-comment'>-- dropping characters that fail the predicate @p@ from the end of</span>
<a name="line-856"></a><span class='hs-comment'>-- @t@.</span>
<a name="line-857"></a><span class='hs-comment'>-- Examples:</span>
<a name="line-858"></a><span class='hs-comment'>--</span>
<a name="line-859"></a><span class='hs-comment'>-- > dropWhileEnd (=='.') "foo..." == "foo"</span>
<a name="line-860"></a><span class='hs-definition'>dropWhileEnd</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</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-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-861"></a><span class='hs-definition'>dropWhileEnd</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span>
<a name="line-862"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>go</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Empty</span>
<a name="line-863"></a> <span class='hs-varid'>go</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-conid'>Empty</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>t'</span>
<a name="line-864"></a> <span class='hs-keyword'>then</span> <span class='hs-conid'>Empty</span>
<a name="line-865"></a> <span class='hs-keyword'>else</span> <span class='hs-conid'>Chunk</span> <span class='hs-varid'>t'</span> <span class='hs-conid'>Empty</span>
<a name="line-866"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>t'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>dropWhileEnd</span> <span class='hs-varid'>p</span> <span class='hs-varid'>t</span>
<a name="line-867"></a> <span class='hs-varid'>go</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>go</span> <span class='hs-varid'>ts</span> <span class='hs-keyword'>of</span>
<a name="line-868"></a> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>go</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-conid'>Empty</span><span class='hs-layout'>)</span>
<a name="line-869"></a> <span class='hs-varid'>ts'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ts'</span>
<a name="line-870"></a><span class='hs-comment'>{-# INLINE dropWhileEnd #-}</span>
<a name="line-871"></a>
<a name="line-872"></a><a name="dropAround"></a><span class='hs-comment'>-- | /O(n)/ 'dropAround' @p@ @t@ returns the substring remaining after</span>
<a name="line-873"></a><span class='hs-comment'>-- dropping characters that fail the predicate @p@ from both the</span>
<a name="line-874"></a><span class='hs-comment'>-- beginning and end of @t@. Subject to fusion.</span>
<a name="line-875"></a><span class='hs-definition'>dropAround</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</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-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-876"></a><span class='hs-definition'>dropAround</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dropWhile</span> <span class='hs-varid'>p</span> <span class='hs-varop'>.</span> <span class='hs-varid'>dropWhileEnd</span> <span class='hs-varid'>p</span>
<a name="line-877"></a><span class='hs-comment'>{-# INLINE [1] dropAround #-}</span>
<a name="line-878"></a>
<a name="line-879"></a><a name="stripStart"></a><span class='hs-comment'>-- | /O(n)/ Remove leading white space from a string. Equivalent to:</span>
<a name="line-880"></a><span class='hs-comment'>--</span>
<a name="line-881"></a><span class='hs-comment'>-- > dropWhile isSpace</span>
<a name="line-882"></a><span class='hs-definition'>stripStart</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-883"></a><span class='hs-definition'>stripStart</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dropWhile</span> <span class='hs-varid'>isSpace</span>
<a name="line-884"></a><span class='hs-comment'>{-# INLINE [1] stripStart #-}</span>
<a name="line-885"></a>
<a name="line-886"></a><a name="stripEnd"></a><span class='hs-comment'>-- | /O(n)/ Remove trailing white space from a string. Equivalent to:</span>
<a name="line-887"></a><span class='hs-comment'>--</span>
<a name="line-888"></a><span class='hs-comment'>-- > dropWhileEnd isSpace</span>
<a name="line-889"></a><span class='hs-definition'>stripEnd</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-890"></a><span class='hs-definition'>stripEnd</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dropWhileEnd</span> <span class='hs-varid'>isSpace</span>
<a name="line-891"></a><span class='hs-comment'>{-# INLINE [1] stripEnd #-}</span>
<a name="line-892"></a>
<a name="line-893"></a><a name="strip"></a><span class='hs-comment'>-- | /O(n)/ Remove leading and trailing white space from a string.</span>
<a name="line-894"></a><span class='hs-comment'>-- Equivalent to:</span>
<a name="line-895"></a><span class='hs-comment'>--</span>
<a name="line-896"></a><span class='hs-comment'>-- > dropAround isSpace</span>
<a name="line-897"></a><span class='hs-definition'>strip</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-898"></a><span class='hs-definition'>strip</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dropAround</span> <span class='hs-varid'>isSpace</span>
<a name="line-899"></a><span class='hs-comment'>{-# INLINE [1] strip #-}</span>
<a name="line-900"></a>
<a name="line-901"></a><a name="splitAt"></a><span class='hs-comment'>-- | /O(n)/ 'splitAt' @n t@ returns a pair whose first element is a</span>
<a name="line-902"></a><span class='hs-comment'>-- prefix of @t@ of length @n@, and whose second is the remainder of</span>
<a name="line-903"></a><span class='hs-comment'>-- the string. It is equivalent to @('take' n t, 'drop' n t)@.</span>
<a name="line-904"></a><span class='hs-definition'>splitAt</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int64</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</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-conid'>Text</span><span class='hs-layout'>)</span>
<a name="line-905"></a><span class='hs-definition'>splitAt</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>loop</span>
<a name="line-906"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>loop</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>empty</span><span class='hs-layout'>,</span> <span class='hs-varid'>empty</span><span class='hs-layout'>)</span>
<a name="line-907"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>n</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>n</span> <span class='hs-varop'><=</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>empty</span><span class='hs-layout'>,</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-908"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>n</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span>
<a name="line-909"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>n</span> <span class='hs-varop'><</span> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>t'</span><span class='hs-layout'>,</span><span class='hs-varid'>t''</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>splitAt</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span>
<a name="line-910"></a> <span class='hs-keyword'>in</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t'</span> <span class='hs-conid'>Empty</span><span class='hs-layout'>,</span> <span class='hs-conid'>Chunk</span> <span class='hs-varid'>t''</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span>
<a name="line-911"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>ts'</span><span class='hs-layout'>,</span><span class='hs-varid'>ts''</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>loop</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span> <span class='hs-comment'>-</span> <span class='hs-varid'>len</span><span class='hs-layout'>)</span> <span class='hs-varid'>ts</span>
<a name="line-912"></a> <span class='hs-keyword'>in</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ts'</span><span class='hs-layout'>,</span> <span class='hs-varid'>ts''</span><span class='hs-layout'>)</span>
<a name="line-913"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-914"></a>
<a name="line-915"></a><a name="splitAtWord"></a><span class='hs-comment'>-- | /O(n)/ 'splitAtWord' @n t@ returns a strict pair whose first</span>
<a name="line-916"></a><span class='hs-comment'>-- element is a prefix of @t@ whose chunks contain @n@ 'Word16'</span>
<a name="line-917"></a><span class='hs-comment'>-- values, and whose second is the remainder of the string.</span>
<a name="line-918"></a><span class='hs-definition'>splitAtWord</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int64</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PairS</span> <span class='hs-conid'>Text</span> <span class='hs-conid'>Text</span>
<a name="line-919"></a><span class='hs-definition'>splitAtWord</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>empty</span> <span class='hs-conop'>:*:</span> <span class='hs-varid'>empty</span>
<a name="line-920"></a><span class='hs-definition'>splitAtWord</span> <span class='hs-varid'>x</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>c</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span> <span class='hs-varid'>arr</span> <span class='hs-varid'>off</span> <span class='hs-varid'>len</span><span class='hs-layout'>)</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span>
<a name="line-921"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>y</span> <span class='hs-varop'>>=</span> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>h</span> <span class='hs-conop'>:*:</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitAtWord</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-comment'>-</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>len</span><span class='hs-layout'>)</span> <span class='hs-varid'>cs</span>
<a name="line-922"></a> <span class='hs-keyword'>in</span> <span class='hs-conid'>Chunk</span> <span class='hs-varid'>c</span> <span class='hs-varid'>h</span> <span class='hs-conop'>:*:</span> <span class='hs-varid'>t</span>
<a name="line-923"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>chunk</span> <span class='hs-layout'>(</span><span class='hs-varid'>textP</span> <span class='hs-varid'>arr</span> <span class='hs-varid'>off</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-varid'>empty</span> <span class='hs-conop'>:*:</span>
<a name="line-924"></a> <span class='hs-varid'>chunk</span> <span class='hs-layout'>(</span><span class='hs-varid'>textP</span> <span class='hs-varid'>arr</span> <span class='hs-layout'>(</span><span class='hs-varid'>off</span><span class='hs-varop'>+</span><span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>len</span><span class='hs-comment'>-</span><span class='hs-varid'>y</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>cs</span>
<a name="line-925"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>x</span>
<a name="line-926"></a>
<a name="line-927"></a><a name="break"></a><span class='hs-comment'>-- | /O(n+m)/ Find the first instance of @needle@ (which must be</span>
<a name="line-928"></a><span class='hs-comment'>-- non-'null') in @haystack@. The first element of the returned tuple</span>
<a name="line-929"></a><span class='hs-comment'>-- is the prefix of @haystack@ before @needle@ is matched. The second</span>
<a name="line-930"></a><span class='hs-comment'>-- is the remainder of @haystack@, starting with the match.</span>
<a name="line-931"></a><span class='hs-comment'>--</span>
<a name="line-932"></a><span class='hs-comment'>-- Examples:</span>
<a name="line-933"></a><span class='hs-comment'>--</span>
<a name="line-934"></a><span class='hs-comment'>-- > break "::" "a::b::c" ==> ("a", "::b::c")</span>
<a name="line-935"></a><span class='hs-comment'>-- > break "/" "foobar" ==> ("foobar", "")</span>
<a name="line-936"></a><span class='hs-comment'>--</span>
<a name="line-937"></a><span class='hs-comment'>-- Laws:</span>
<a name="line-938"></a><span class='hs-comment'>--</span>
<a name="line-939"></a><span class='hs-comment'>-- > append prefix match == haystack</span>
<a name="line-940"></a><span class='hs-comment'>-- > where (prefix, match) = break needle haystack</span>
<a name="line-941"></a><span class='hs-comment'>--</span>
<a name="line-942"></a><span class='hs-comment'>-- If you need to break a string by a substring repeatedly (e.g. you</span>
<a name="line-943"></a><span class='hs-comment'>-- want to break on every instance of a substring), use 'find'</span>
<a name="line-944"></a><span class='hs-comment'>-- instead, as it has lower startup overhead.</span>
<a name="line-945"></a><span class='hs-comment'>--</span>
<a name="line-946"></a><span class='hs-comment'>-- This function is strict in its first argument, and lazy in its</span>
<a name="line-947"></a><span class='hs-comment'>-- second.</span>
<a name="line-948"></a><span class='hs-comment'>--</span>
<a name="line-949"></a><span class='hs-comment'>-- In (unlikely) bad cases, this function's time complexity degrades</span>
<a name="line-950"></a><span class='hs-comment'>-- towards /O(n*m)/.</span>
<a name="line-951"></a><span class='hs-definition'>break</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</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-conid'>Text</span><span class='hs-layout'>)</span>
<a name="line-952"></a><span class='hs-definition'>break</span> <span class='hs-varid'>pat</span> <span class='hs-varid'>src</span>
<a name="line-953"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>null</span> <span class='hs-varid'>pat</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>emptyError</span> <span class='hs-str'>"break"</span>
<a name="line-954"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>indices</span> <span class='hs-varid'>pat</span> <span class='hs-varid'>src</span> <span class='hs-keyword'>of</span>
<a name="line-955"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>src</span><span class='hs-layout'>,</span> <span class='hs-varid'>empty</span><span class='hs-layout'>)</span>
<a name="line-956"></a> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>let</span> <span class='hs-varid'>h</span> <span class='hs-conop'>:*:</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitAtWord</span> <span class='hs-varid'>x</span> <span class='hs-varid'>src</span>
<a name="line-957"></a> <span class='hs-keyword'>in</span> <span class='hs-layout'>(</span><span class='hs-varid'>h</span><span class='hs-layout'>,</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-958"></a>
<a name="line-959"></a><a name="breakEnd"></a><span class='hs-comment'>-- | /O(n+m)/ Similar to 'break', but searches from the end of the string.</span>
<a name="line-960"></a><span class='hs-comment'>--</span>
<a name="line-961"></a><span class='hs-comment'>-- The first element of the returned tuple is the prefix of @haystack@</span>
<a name="line-962"></a><span class='hs-comment'>-- up to and including the last match of @needle@. The second is the</span>
<a name="line-963"></a><span class='hs-comment'>-- remainder of @haystack@, following the match.</span>
<a name="line-964"></a><span class='hs-comment'>--</span>
<a name="line-965"></a><span class='hs-comment'>-- > breakEnd "::" "a::b::c" ==> ("a::b::", "c")</span>
<a name="line-966"></a><span class='hs-definition'>breakEnd</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</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-conid'>Text</span><span class='hs-layout'>)</span>
<a name="line-967"></a><span class='hs-definition'>breakEnd</span> <span class='hs-varid'>pat</span> <span class='hs-varid'>src</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>break</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverse</span> <span class='hs-varid'>pat</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverse</span> <span class='hs-varid'>src</span><span class='hs-layout'>)</span>
<a name="line-968"></a> <span class='hs-keyword'>in</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverse</span> <span class='hs-varid'>b</span><span class='hs-layout'>,</span> <span class='hs-varid'>reverse</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-969"></a><span class='hs-comment'>{-# INLINE breakEnd #-}</span>
<a name="line-970"></a>
<a name="line-971"></a><a name="find"></a><span class='hs-comment'>-- | /O(n+m)/ Find all non-overlapping instances of @needle@ in</span>
<a name="line-972"></a><span class='hs-comment'>-- @haystack@. Each element of the returned list consists of a pair:</span>
<a name="line-973"></a><span class='hs-comment'>--</span>
<a name="line-974"></a><span class='hs-comment'>-- * The entire string prior to the /k/th match (i.e. the prefix)</span>
<a name="line-975"></a><span class='hs-comment'>--</span>
<a name="line-976"></a><span class='hs-comment'>-- * The /k/th match, followed by the remainder of the string</span>
<a name="line-977"></a><span class='hs-comment'>--</span>
<a name="line-978"></a><span class='hs-comment'>-- Examples:</span>
<a name="line-979"></a><span class='hs-comment'>--</span>
<a name="line-980"></a><span class='hs-comment'>-- > find "::" ""</span>
<a name="line-981"></a><span class='hs-comment'>-- > ==> []</span>
<a name="line-982"></a><span class='hs-comment'>-- > find "/" "a/b/c/"</span>
<a name="line-983"></a><span class='hs-comment'>-- > ==> [("a", "/b/c/"), ("a/b", "/c/"), ("a/b/c", "/")]</span>
<a name="line-984"></a><span class='hs-comment'>--</span>
<a name="line-985"></a><span class='hs-comment'>-- This function is strict in its first argument, and lazy in its</span>
<a name="line-986"></a><span class='hs-comment'>-- second.</span>
<a name="line-987"></a><span class='hs-comment'>--</span>
<a name="line-988"></a><span class='hs-comment'>-- In (unlikely) bad cases, this function's time complexity degrades</span>
<a name="line-989"></a><span class='hs-comment'>-- towards /O(n*m)/.</span>
<a name="line-990"></a><span class='hs-comment'>--</span>
<a name="line-991"></a><span class='hs-comment'>-- The @needle@ parameter may not be empty.</span>
<a name="line-992"></a><span class='hs-definition'>find</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-comment'>-- ^ @needle@ to search for</span>
<a name="line-993"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-comment'>-- ^ @haystack@ in which to search</span>
<a name="line-994"></a> <span class='hs-keyglyph'>-></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-conid'>Text</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-995"></a><span class='hs-definition'>find</span> <span class='hs-varid'>pat</span> <span class='hs-varid'>src</span>
<a name="line-996"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>null</span> <span class='hs-varid'>pat</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>emptyError</span> <span class='hs-str'>"find"</span>
<a name="line-997"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span> <span class='hs-num'>0</span> <span class='hs-varid'>empty</span> <span class='hs-varid'>src</span> <span class='hs-layout'>(</span><span class='hs-varid'>indices</span> <span class='hs-varid'>pat</span> <span class='hs-varid'>src</span><span class='hs-layout'>)</span>
<a name="line-998"></a> <span class='hs-keyword'>where</span>
<a name="line-999"></a> <span class='hs-varid'>go</span> <span class='hs-varop'>!</span><span class='hs-varid'>n</span> <span class='hs-varid'>p</span> <span class='hs-varid'>s</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-keyword'>let</span> <span class='hs-varid'>h</span> <span class='hs-conop'>:*:</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitAtWord</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-comment'>-</span><span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span>
<a name="line-1000"></a> <span class='hs-varid'>h'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>append</span> <span class='hs-varid'>p</span> <span class='hs-varid'>h</span>
<a name="line-1001"></a> <span class='hs-keyword'>in</span> <span class='hs-layout'>(</span><span class='hs-varid'>h'</span><span class='hs-layout'>,</span><span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>go</span> <span class='hs-varid'>x</span> <span class='hs-varid'>h'</span> <span class='hs-varid'>t</span> <span class='hs-varid'>xs</span>
<a name="line-1002"></a> <span class='hs-varid'>go</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-1003"></a>
<a name="line-1004"></a><a name="breakBy"></a><span class='hs-comment'>-- | /O(n)/ 'breakBy' is like 'spanBy', but the prefix returned is over</span>
<a name="line-1005"></a><span class='hs-comment'>-- elements that fail the predicate @p@.</span>
<a name="line-1006"></a><span class='hs-definition'>breakBy</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</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-conid'>Text</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-conid'>Text</span><span class='hs-layout'>)</span>
<a name="line-1007"></a><span class='hs-definition'>breakBy</span> <span class='hs-varid'>p</span> <span class='hs-varid'>t0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>break'</span> <span class='hs-varid'>t0</span>
<a name="line-1008"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>break'</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>empty</span><span class='hs-layout'>,</span> <span class='hs-varid'>empty</span><span class='hs-layout'>)</span>
<a name="line-1009"></a> <span class='hs-varid'>break'</span> <span class='hs-varid'>c</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-1010"></a> <span class='hs-keyword'>case</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>findIndex</span> <span class='hs-varid'>p</span> <span class='hs-varid'>t</span> <span class='hs-keyword'>of</span>
<a name="line-1011"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>ts'</span><span class='hs-layout'>,</span> <span class='hs-varid'>ts''</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>break'</span> <span class='hs-varid'>ts</span>
<a name="line-1012"></a> <span class='hs-keyword'>in</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ts'</span><span class='hs-layout'>,</span> <span class='hs-varid'>ts''</span><span class='hs-layout'>)</span>
<a name="line-1013"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>n</span> <span class='hs-varop'>==</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Empty</span><span class='hs-layout'>,</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-1014"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>splitAt</span> <span class='hs-varid'>n</span> <span class='hs-varid'>t</span>
<a name="line-1015"></a> <span class='hs-keyword'>in</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>a</span> <span class='hs-conid'>Empty</span><span class='hs-layout'>,</span> <span class='hs-conid'>Chunk</span> <span class='hs-varid'>b</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span>
<a name="line-1016"></a>
<a name="line-1017"></a><a name="spanBy"></a><span class='hs-comment'>-- | /O(n)/ 'spanBy', applied to a predicate @p@ and text @t@, returns</span>
<a name="line-1018"></a><span class='hs-comment'>-- a pair whose first element is the longest prefix (possibly empty)</span>
<a name="line-1019"></a><span class='hs-comment'>-- of @t@ of elements that satisfy @p@, and whose second is the</span>
<a name="line-1020"></a><span class='hs-comment'>-- remainder of the list.</span>
<a name="line-1021"></a><span class='hs-definition'>spanBy</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</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-conid'>Text</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-conid'>Text</span><span class='hs-layout'>)</span>
<a name="line-1022"></a><span class='hs-definition'>spanBy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>breakBy</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-varop'>.</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-1023"></a><span class='hs-comment'>{-# INLINE spanBy #-}</span>
<a name="line-1024"></a>
<a name="line-1025"></a><a name="group"></a><span class='hs-comment'>-- | The 'group' function takes a 'Text' and returns a list of 'Text's</span>
<a name="line-1026"></a><span class='hs-comment'>-- such that the concatenation of the result is equal to the argument.</span>
<a name="line-1027"></a><span class='hs-comment'>-- Moreover, each sublist in the result contains only equal elements.</span>
<a name="line-1028"></a><span class='hs-comment'>-- For example,</span>
<a name="line-1029"></a><span class='hs-comment'>--</span>
<a name="line-1030"></a><span class='hs-comment'>-- > group "Mississippi" = ["M","i","ss","i","ss","i","pp","i"]</span>
<a name="line-1031"></a><span class='hs-comment'>--</span>
<a name="line-1032"></a><span class='hs-comment'>-- It is a special case of 'groupBy', which allows the programmer to</span>
<a name="line-1033"></a><span class='hs-comment'>-- supply their own equality test.</span>
<a name="line-1034"></a><span class='hs-definition'>group</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span>
<a name="line-1035"></a><span class='hs-definition'>group</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>groupBy</span> <span class='hs-layout'>(</span><span class='hs-varop'>==</span><span class='hs-layout'>)</span>
<a name="line-1036"></a><span class='hs-comment'>{-# INLINE group #-}</span>
<a name="line-1037"></a>
<a name="line-1038"></a><a name="groupBy"></a><span class='hs-comment'>-- | The 'groupBy' function is the non-overloaded version of 'group'.</span>
<a name="line-1039"></a><span class='hs-definition'>groupBy</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</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-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span>
<a name="line-1040"></a><span class='hs-definition'>groupBy</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-1041"></a><span class='hs-definition'>groupBy</span> <span class='hs-varid'>eq</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cons</span> <span class='hs-varid'>x</span> <span class='hs-varid'>ys</span> <span class='hs-conop'>:</span> <span class='hs-varid'>groupBy</span> <span class='hs-varid'>eq</span> <span class='hs-varid'>zs</span>
<a name="line-1042"></a> <span class='hs-keyword'>where</span> <span class='hs-layout'>(</span><span class='hs-varid'>ys</span><span class='hs-layout'>,</span><span class='hs-varid'>zs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>spanBy</span> <span class='hs-layout'>(</span><span class='hs-varid'>eq</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span>
<a name="line-1043"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>unsafeHead</span> <span class='hs-varid'>t</span>
<a name="line-1044"></a> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>chunk</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>unsafeTail</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varid'>ts</span>
<a name="line-1045"></a>
<a name="line-1046"></a><a name="inits"></a><span class='hs-comment'>-- | /O(n)/ Return all initial segments of the given 'Text',</span>
<a name="line-1047"></a><span class='hs-comment'>-- shortest first.</span>
<a name="line-1048"></a><span class='hs-definition'>inits</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span>
<a name="line-1049"></a><span class='hs-definition'>inits</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>Empty</span> <span class='hs-conop'>:</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>inits'</span>
<a name="line-1050"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>inits'</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-1051"></a> <span class='hs-varid'>inits'</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>t'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Chunk</span> <span class='hs-varid'>t'</span> <span class='hs-conid'>Empty</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-varid'>tail</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>inits</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-1052"></a> <span class='hs-varop'>++</span> <span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>inits'</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span>
<a name="line-1053"></a>
<a name="line-1054"></a><a name="tails"></a><span class='hs-comment'>-- | /O(n)/ Return all final segments of the given 'Text', longest</span>
<a name="line-1055"></a><span class='hs-comment'>-- first.</span>
<a name="line-1056"></a><span class='hs-definition'>tails</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span>
<a name="line-1057"></a><span class='hs-definition'>tails</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Empty</span> <span class='hs-conop'>:</span> <span class='hs-conid'>[]</span>
<a name="line-1058"></a><span class='hs-definition'>tails</span> <span class='hs-varid'>ts</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ts'</span><span class='hs-layout'>)</span>
<a name="line-1059"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>t</span> <span class='hs-varop'>==</span> <span class='hs-num'>1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ts</span> <span class='hs-conop'>:</span> <span class='hs-varid'>tails</span> <span class='hs-varid'>ts'</span>
<a name="line-1060"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ts</span> <span class='hs-conop'>:</span> <span class='hs-varid'>tails</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>unsafeTail</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varid'>ts'</span><span class='hs-layout'>)</span>
<a name="line-1061"></a>
<a name="line-1062"></a><span class='hs-comment'>-- $split</span>
<a name="line-1063"></a><span class='hs-comment'>--</span>
<a name="line-1064"></a><span class='hs-comment'>-- Splitting functions in this library do not perform character-wise</span>
<a name="line-1065"></a><span class='hs-comment'>-- copies to create substrings; they just construct new 'Text's that</span>
<a name="line-1066"></a><span class='hs-comment'>-- are slices of the original.</span>
<a name="line-1067"></a>
<a name="line-1068"></a><a name="split"></a><span class='hs-comment'>-- | /O(m+n)/ Break a 'Text' into pieces separated by the first</span>
<a name="line-1069"></a><span class='hs-comment'>-- 'Text' argument, consuming the delimiter. An empty delimiter is</span>
<a name="line-1070"></a><span class='hs-comment'>-- invalid, and will cause an error to be raised.</span>
<a name="line-1071"></a><span class='hs-comment'>--</span>
<a name="line-1072"></a><span class='hs-comment'>-- Examples:</span>
<a name="line-1073"></a><span class='hs-comment'>--</span>
<a name="line-1074"></a><span class='hs-comment'>-- > split "\r\n" "a\r\nb\r\nd\r\ne" == ["a","b","d","e"]</span>
<a name="line-1075"></a><span class='hs-comment'>-- > split "aaa" "aaaXaaaXaaaXaaa" == ["","X","X","X",""]</span>
<a name="line-1076"></a><span class='hs-comment'>-- > split "x" "x" == ["",""]</span>
<a name="line-1077"></a><span class='hs-comment'>-- </span>
<a name="line-1078"></a><span class='hs-comment'>-- and</span>
<a name="line-1079"></a><span class='hs-comment'>--</span>
<a name="line-1080"></a><span class='hs-comment'>-- > intercalate s . split s == id</span>
<a name="line-1081"></a><span class='hs-comment'>-- > split (singleton c) == splitBy (==c)</span>
<a name="line-1082"></a><span class='hs-comment'>--</span>
<a name="line-1083"></a><span class='hs-comment'>-- This function is strict in its first argument, and lazy in its</span>
<a name="line-1084"></a><span class='hs-comment'>-- second.</span>
<a name="line-1085"></a><span class='hs-comment'>--</span>
<a name="line-1086"></a><span class='hs-comment'>-- In (unlikely) bad cases, this function's time complexity degrades</span>
<a name="line-1087"></a><span class='hs-comment'>-- towards /O(n*m)/.</span>
<a name="line-1088"></a><span class='hs-definition'>split</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-comment'>-- ^ Text to split on</span>
<a name="line-1089"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-comment'>-- ^ Input text</span>
<a name="line-1090"></a> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span>
<a name="line-1091"></a><span class='hs-definition'>split</span> <span class='hs-varid'>pat</span> <span class='hs-varid'>src</span>
<a name="line-1092"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>null</span> <span class='hs-varid'>pat</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>emptyError</span> <span class='hs-str'>"split"</span>
<a name="line-1093"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isSingleton</span> <span class='hs-varid'>pat</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitBy</span> <span class='hs-layout'>(</span><span class='hs-varop'>==</span> <span class='hs-varid'>head</span> <span class='hs-varid'>pat</span><span class='hs-layout'>)</span> <span class='hs-varid'>src</span>
<a name="line-1094"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span> <span class='hs-num'>0</span> <span class='hs-layout'>(</span><span class='hs-varid'>indices</span> <span class='hs-varid'>pat</span> <span class='hs-varid'>src</span><span class='hs-layout'>)</span> <span class='hs-varid'>src</span>
<a name="line-1095"></a> <span class='hs-keyword'>where</span>
<a name="line-1096"></a> <span class='hs-varid'>go</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>cs</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>cs</span><span class='hs-keyglyph'>]</span>
<a name="line-1097"></a> <span class='hs-varid'>go</span> <span class='hs-varop'>!</span><span class='hs-varid'>i</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-varid'>cs</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>h</span> <span class='hs-conop'>:*:</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitAtWord</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-comment'>-</span><span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>cs</span>
<a name="line-1098"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>h</span> <span class='hs-conop'>:</span> <span class='hs-varid'>go</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-varop'>+</span><span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span> <span class='hs-layout'>(</span><span class='hs-varid'>dropWords</span> <span class='hs-varid'>l</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-1099"></a> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldlChunks</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-varop'>+</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-num'>0</span> <span class='hs-varid'>pat</span>
<a name="line-1100"></a><span class='hs-comment'>{-# INLINE [1] split #-}</span>
<a name="line-1101"></a>
<a name="line-1102"></a><span class='hs-comment'>{-# RULES
<a name="line-1103"></a>"LAZY TEXT split/singleton -> splitBy/==" [~1] forall c t.
<a name="line-1104"></a> split (singleton c) t = splitBy (==c) t
<a name="line-1105"></a> #-}</span>
<a name="line-1106"></a>
<a name="line-1107"></a><a name="splitBy"></a><span class='hs-comment'>-- | /O(n)/ Splits a 'Text' into components delimited by separators,</span>
<a name="line-1108"></a><span class='hs-comment'>-- where the predicate returns True for a separator element. The</span>
<a name="line-1109"></a><span class='hs-comment'>-- resulting components do not contain the separators. Two adjacent</span>
<a name="line-1110"></a><span class='hs-comment'>-- separators result in an empty component in the output. eg.</span>
<a name="line-1111"></a><span class='hs-comment'>--</span>
<a name="line-1112"></a><span class='hs-comment'>-- > splitBy (=='a') "aabbaca" == ["","","bb","c",""]</span>
<a name="line-1113"></a><span class='hs-comment'>-- > splitBy (=='a') [] == [""]</span>
<a name="line-1114"></a><span class='hs-definition'>splitBy</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</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-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span>
<a name="line-1115"></a><span class='hs-definition'>splitBy</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Empty</span><span class='hs-keyglyph'>]</span>
<a name="line-1116"></a><span class='hs-definition'>splitBy</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t0</span> <span class='hs-varid'>ts0</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>comb</span> <span class='hs-conid'>[]</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>splitBy</span> <span class='hs-varid'>p</span> <span class='hs-varid'>t0</span><span class='hs-layout'>)</span> <span class='hs-varid'>ts0</span>
<a name="line-1117"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>comb</span> <span class='hs-varid'>acc</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span><span class='hs-conop'>:</span><span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>revChunks</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span><span class='hs-conop'>:</span><span class='hs-varid'>acc</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-conid'>[]</span>
<a name="line-1118"></a> <span class='hs-varid'>comb</span> <span class='hs-varid'>acc</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span><span class='hs-conop'>:</span><span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>comb</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span><span class='hs-conop'>:</span><span class='hs-varid'>acc</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>splitBy</span> <span class='hs-varid'>p</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varid'>ts</span>
<a name="line-1119"></a> <span class='hs-varid'>comb</span> <span class='hs-varid'>acc</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span><span class='hs-conop'>:</span><span class='hs-varid'>ss</span><span class='hs-layout'>)</span> <span class='hs-varid'>ts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>revChunks</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span><span class='hs-conop'>:</span><span class='hs-varid'>acc</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>comb</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>ss</span> <span class='hs-varid'>ts</span>
<a name="line-1120"></a> <span class='hs-varid'>comb</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>impossibleError</span> <span class='hs-str'>"splitBy"</span>
<a name="line-1121"></a><span class='hs-comment'>{-# INLINE splitBy #-}</span>
<a name="line-1122"></a>
<a name="line-1123"></a><a name="chunksOf"></a><span class='hs-comment'>-- | /O(n)/ Splits a 'Text' into components of length @k@. The last</span>
<a name="line-1124"></a><span class='hs-comment'>-- element may be shorter than the other chunks, depending on the</span>
<a name="line-1125"></a><span class='hs-comment'>-- length of the input. Examples:</span>
<a name="line-1126"></a><span class='hs-comment'>--</span>
<a name="line-1127"></a><span class='hs-comment'>-- > chunksOf 3 "foobarbaz" == ["foo","bar","baz"]</span>
<a name="line-1128"></a><span class='hs-comment'>-- > chunksOf 4 "haskell.org" == ["hask","ell.","org"]</span>
<a name="line-1129"></a><span class='hs-definition'>chunksOf</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int64</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span>
<a name="line-1130"></a><span class='hs-definition'>chunksOf</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span>
<a name="line-1131"></a> <span class='hs-keyword'>where</span>
<a name="line-1132"></a> <span class='hs-varid'>go</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>splitAt</span> <span class='hs-varid'>k</span> <span class='hs-varid'>t</span> <span class='hs-keyword'>of</span>
<a name="line-1133"></a> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>null</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>[]</span>
<a name="line-1134"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-conop'>:</span> <span class='hs-varid'>go</span> <span class='hs-varid'>b</span>
<a name="line-1135"></a><span class='hs-comment'>{-# INLINE chunksOf #-}</span>
<a name="line-1136"></a>
<a name="line-1137"></a><a name="lines"></a><span class='hs-comment'>-- | /O(n)/ Breaks a 'Text' up into a list of 'Text's at</span>
<a name="line-1138"></a><span class='hs-comment'>-- newline 'Char's. The resulting strings do not contain newlines.</span>
<a name="line-1139"></a><span class='hs-definition'>lines</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span>
<a name="line-1140"></a><span class='hs-definition'>lines</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-1141"></a><span class='hs-definition'>lines</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span><span class='hs-layout'>,</span><span class='hs-varid'>t'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>breakBy</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>==</span><span class='hs-layout'>)</span> <span class='hs-chr'>'\n'</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span>
<a name="line-1142"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>l</span> <span class='hs-conop'>:</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-varid'>t'</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>[]</span>
<a name="line-1143"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>lines</span> <span class='hs-layout'>(</span><span class='hs-varid'>tail</span> <span class='hs-varid'>t'</span><span class='hs-layout'>)</span>
<a name="line-1144"></a>
<a name="line-1145"></a><a name="words"></a><span class='hs-comment'>-- | /O(n)/ Breaks a 'Text' up into a list of words, delimited by 'Char's</span>
<a name="line-1146"></a><span class='hs-comment'>-- representing white space.</span>
<a name="line-1147"></a><span class='hs-definition'>words</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span>
<a name="line-1148"></a><span class='hs-definition'>words</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-varop'>.</span> <span class='hs-varid'>null</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>splitBy</span> <span class='hs-varid'>isSpace</span>
<a name="line-1149"></a><span class='hs-comment'>{-# INLINE words #-}</span>
<a name="line-1150"></a>
<a name="line-1151"></a><a name="unlines"></a><span class='hs-comment'>-- | /O(n)/ Joins lines, after appending a terminating newline to</span>
<a name="line-1152"></a><span class='hs-comment'>-- each.</span>
<a name="line-1153"></a><span class='hs-definition'>unlines</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-1154"></a><span class='hs-definition'>unlines</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concat</span> <span class='hs-varop'>.</span> <span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varop'>`snoc`</span> <span class='hs-chr'>'\n'</span><span class='hs-layout'>)</span>
<a name="line-1155"></a><span class='hs-comment'>{-# INLINE unlines #-}</span>
<a name="line-1156"></a>
<a name="line-1157"></a><a name="unwords"></a><span class='hs-comment'>-- | /O(n)/ Joins words using single space characters.</span>
<a name="line-1158"></a><span class='hs-definition'>unwords</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-1159"></a><span class='hs-definition'>unwords</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>intercalate</span> <span class='hs-layout'>(</span><span class='hs-varid'>singleton</span> <span class='hs-chr'>' '</span><span class='hs-layout'>)</span>
<a name="line-1160"></a><span class='hs-comment'>{-# INLINE unwords #-}</span>
<a name="line-1161"></a>
<a name="line-1162"></a><a name="isPrefixOf"></a><span class='hs-comment'>-- | /O(n)/ The 'isPrefixOf' function takes two 'Text's and returns</span>
<a name="line-1163"></a><span class='hs-comment'>-- 'True' iff the first is a prefix of the second. This function is</span>
<a name="line-1164"></a><span class='hs-comment'>-- subject to fusion.</span>
<a name="line-1165"></a><span class='hs-definition'>isPrefixOf</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-1166"></a><span class='hs-definition'>isPrefixOf</span> <span class='hs-conid'>Empty</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-1167"></a><span class='hs-definition'>isPrefixOf</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-1168"></a><span class='hs-definition'>isPrefixOf</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>x</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>y</span> <span class='hs-varid'>ys</span><span class='hs-layout'>)</span>
<a name="line-1169"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>lx</span> <span class='hs-varop'>==</span> <span class='hs-varid'>ly</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>y</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>isPrefixOf</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>ys</span>
<a name="line-1170"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>lx</span> <span class='hs-varop'><</span> <span class='hs-varid'>ly</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>yh</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>isPrefixOf</span> <span class='hs-varid'>xs</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>yt</span> <span class='hs-varid'>ys</span><span class='hs-layout'>)</span>
<a name="line-1171"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>xh</span> <span class='hs-varop'>==</span> <span class='hs-varid'>y</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>isPrefixOf</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chunk</span> <span class='hs-varid'>xt</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-varid'>ys</span>
<a name="line-1172"></a> <span class='hs-keyword'>where</span> <span class='hs-layout'>(</span><span class='hs-varid'>xh</span><span class='hs-layout'>,</span><span class='hs-varid'>xt</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>splitAt</span> <span class='hs-varid'>ly</span> <span class='hs-varid'>x</span>
<a name="line-1173"></a> <span class='hs-layout'>(</span><span class='hs-varid'>yh</span><span class='hs-layout'>,</span><span class='hs-varid'>yt</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>splitAt</span> <span class='hs-varid'>lx</span> <span class='hs-varid'>y</span>
<a name="line-1174"></a> <span class='hs-varid'>lx</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>x</span>
<a name="line-1175"></a> <span class='hs-varid'>ly</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>y</span>
<a name="line-1176"></a><span class='hs-comment'>{-# INLINE [1] isPrefixOf #-}</span>
<a name="line-1177"></a>
<a name="line-1178"></a><span class='hs-comment'>{-# RULES
<a name="line-1179"></a>"LAZY TEXT isPrefixOf -> fused" [~1] forall s t.
<a name="line-1180"></a> isPrefixOf s t = S.isPrefixOf (stream s) (stream t)
<a name="line-1181"></a>"LAZY TEXT isPrefixOf -> unfused" [1] forall s t.
<a name="line-1182"></a> S.isPrefixOf (stream s) (stream t) = isPrefixOf s t
<a name="line-1183"></a> #-}</span>
<a name="line-1184"></a>
<a name="line-1185"></a><a name="isSuffixOf"></a><span class='hs-comment'>-- | /O(n)/ The 'isSuffixOf' function takes two 'Text's and returns</span>
<a name="line-1186"></a><span class='hs-comment'>-- 'True' iff the first is a suffix of the second.</span>
<a name="line-1187"></a><span class='hs-definition'>isSuffixOf</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-1188"></a><span class='hs-definition'>isSuffixOf</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>reverse</span> <span class='hs-varid'>x</span> <span class='hs-varop'>`isPrefixOf`</span> <span class='hs-varid'>reverse</span> <span class='hs-varid'>y</span>
<a name="line-1189"></a><span class='hs-comment'>{-# INLINE isSuffixOf #-}</span>
<a name="line-1190"></a><span class='hs-comment'>-- TODO: a better implementation</span>
<a name="line-1191"></a>
<a name="line-1192"></a><a name="isInfixOf"></a><span class='hs-comment'>-- | /O(n+m)/ The 'isInfixOf' function takes two 'Text's and returns</span>
<a name="line-1193"></a><span class='hs-comment'>-- 'True' iff the first is contained, wholly and intact, anywhere</span>
<a name="line-1194"></a><span class='hs-comment'>-- within the second.</span>
<a name="line-1195"></a><span class='hs-comment'>--</span>
<a name="line-1196"></a><span class='hs-comment'>-- This function is strict in its first argument, and lazy in its</span>
<a name="line-1197"></a><span class='hs-comment'>-- second.</span>
<a name="line-1198"></a><span class='hs-comment'>--</span>
<a name="line-1199"></a><span class='hs-comment'>-- In (unlikely) bad cases, this function's time complexity degrades</span>
<a name="line-1200"></a><span class='hs-comment'>-- towards /O(n*m)/.</span>
<a name="line-1201"></a><span class='hs-definition'>isInfixOf</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-1202"></a><span class='hs-definition'>isInfixOf</span> <span class='hs-varid'>needle</span> <span class='hs-varid'>haystack</span>
<a name="line-1203"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>null</span> <span class='hs-varid'>needle</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-1204"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isSingleton</span> <span class='hs-varid'>needle</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>elem</span> <span class='hs-layout'>(</span><span class='hs-varid'>head</span> <span class='hs-varid'>needle</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>stream</span> <span class='hs-varop'>$</span> <span class='hs-varid'>haystack</span>
<a name="line-1205"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>not</span> <span class='hs-varop'>.</span> <span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varop'>.</span> <span class='hs-varid'>indices</span> <span class='hs-varid'>needle</span> <span class='hs-varop'>$</span> <span class='hs-varid'>haystack</span>
<a name="line-1206"></a><span class='hs-comment'>{-# INLINE [1] isInfixOf #-}</span>
<a name="line-1207"></a>
<a name="line-1208"></a><span class='hs-comment'>{-# RULES
<a name="line-1209"></a>"LAZY TEXT isInfixOf/singleton -> S.elem/S.stream" [~1] forall n h.
<a name="line-1210"></a> isInfixOf (singleton n) h = S.elem n (S.stream h)
<a name="line-1211"></a> #-}</span>
<a name="line-1212"></a>
<a name="line-1213"></a><span class='hs-comment'>-------------------------------------------------------------------------------</span>
<a name="line-1214"></a><span class='hs-comment'>-- * View patterns</span>
<a name="line-1215"></a>
<a name="line-1216"></a><a name="stripPrefix"></a><span class='hs-comment'>-- | /O(n)/ Returns the suffix of the second string if its prefix</span>
<a name="line-1217"></a><span class='hs-comment'>-- matches the first.</span>
<a name="line-1218"></a><span class='hs-comment'>--</span>
<a name="line-1219"></a><span class='hs-comment'>-- Examples:</span>
<a name="line-1220"></a><span class='hs-comment'>--</span>
<a name="line-1221"></a><span class='hs-comment'>-- > stripPrefix "foo" "foobar" == Just "bar"</span>
<a name="line-1222"></a><span class='hs-comment'>-- > stripPrefix "foo" "quux" == Nothing</span>
<a name="line-1223"></a><span class='hs-comment'>--</span>
<a name="line-1224"></a><span class='hs-comment'>-- This is particularly useful with the @ViewPatterns@ extension to</span>
<a name="line-1225"></a><span class='hs-comment'>-- GHC, as follows:</span>
<a name="line-1226"></a><span class='hs-comment'>--</span>
<a name="line-1227"></a><span class='hs-comment'>-- > {-# LANGUAGE ViewPatterns #-}</span>
<a name="line-1228"></a><span class='hs-comment'>-- > import Data.Text as T</span>
<a name="line-1229"></a><span class='hs-comment'>-- ></span>
<a name="line-1230"></a><span class='hs-comment'>-- > fnordLength :: Text -> Int</span>
<a name="line-1231"></a><span class='hs-comment'>-- > fnordLength (stripPrefix "fnord" -> Just suf) = T.length suf</span>
<a name="line-1232"></a><span class='hs-comment'>-- > fnordLength _ = -1</span>
<a name="line-1233"></a><span class='hs-definition'>stripPrefix</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Text</span>
<a name="line-1234"></a><span class='hs-comment'>-- Yes, this could be much more efficient.</span>
<a name="line-1235"></a><span class='hs-definition'>stripPrefix</span> <span class='hs-varid'>p</span> <span class='hs-varid'>t</span>
<a name="line-1236"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>p</span> <span class='hs-varop'>`isPrefixOf`</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>drop</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-1237"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-1238"></a>
<a name="line-1239"></a><a name="stripSuffix"></a><span class='hs-comment'>-- | /O(n)/ Returns the prefix of the second string if its suffix</span>
<a name="line-1240"></a><span class='hs-comment'>-- matches the first.</span>
<a name="line-1241"></a><span class='hs-comment'>--</span>
<a name="line-1242"></a><span class='hs-comment'>-- Examples:</span>
<a name="line-1243"></a><span class='hs-comment'>--</span>
<a name="line-1244"></a><span class='hs-comment'>-- > stripSuffix "bar" "foobar" == Just "foo"</span>
<a name="line-1245"></a><span class='hs-comment'>-- > stripSuffix "foo" "quux" == Nothing</span>
<a name="line-1246"></a><span class='hs-comment'>--</span>
<a name="line-1247"></a><span class='hs-comment'>-- This is particularly useful with the @ViewPatterns@ extension to</span>
<a name="line-1248"></a><span class='hs-comment'>-- GHC, as follows:</span>
<a name="line-1249"></a><span class='hs-comment'>--</span>
<a name="line-1250"></a><span class='hs-comment'>-- > {-# LANGUAGE ViewPatterns #-}</span>
<a name="line-1251"></a><span class='hs-comment'>-- > import Data.Text as T</span>
<a name="line-1252"></a><span class='hs-comment'>-- ></span>
<a name="line-1253"></a><span class='hs-comment'>-- > quuxLength :: Text -> Int</span>
<a name="line-1254"></a><span class='hs-comment'>-- > quuxLength (stripSuffix "quux" -> Just pre) = T.length pre</span>
<a name="line-1255"></a><span class='hs-comment'>-- > quuxLength _ = -1</span>
<a name="line-1256"></a><span class='hs-definition'>stripSuffix</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Text</span>
<a name="line-1257"></a><span class='hs-comment'>-- Yes, this could be much more efficient.</span>
<a name="line-1258"></a><span class='hs-definition'>stripSuffix</span> <span class='hs-varid'>p</span> <span class='hs-varid'>t</span>
<a name="line-1259"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>p</span> <span class='hs-varop'>`isSuffixOf`</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>take</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span> <span class='hs-varid'>t</span> <span class='hs-comment'>-</span> <span class='hs-varid'>length</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-1260"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-1261"></a>
<a name="line-1262"></a><a name="filter"></a><span class='hs-comment'>-- | /O(n)/ 'filter', applied to a predicate and a 'Text',</span>
<a name="line-1263"></a><span class='hs-comment'>-- returns a 'Text' containing those characters that satisfy the</span>
<a name="line-1264"></a><span class='hs-comment'>-- predicate.</span>
<a name="line-1265"></a><span class='hs-definition'>filter</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</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-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-1266"></a><span class='hs-definition'>filter</span> <span class='hs-varid'>p</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unstream</span> <span class='hs-layout'>(</span><span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>filter</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-1267"></a><span class='hs-comment'>{-# INLINE filter #-}</span>
<a name="line-1268"></a>
<a name="line-1269"></a><a name="findBy"></a><span class='hs-comment'>-- | /O(n)/ The 'findBy' function takes a predicate and a 'Text', and</span>
<a name="line-1270"></a><span class='hs-comment'>-- returns the first element in matching the predicate, or 'Nothing'</span>
<a name="line-1271"></a><span class='hs-comment'>-- if there is no such element.</span>
<a name="line-1272"></a><span class='hs-definition'>findBy</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</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-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Char</span>
<a name="line-1273"></a><span class='hs-definition'>findBy</span> <span class='hs-varid'>p</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>findBy</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-1274"></a><span class='hs-comment'>{-# INLINE findBy #-}</span>
<a name="line-1275"></a>
<a name="line-1276"></a><a name="partitionBy"></a><span class='hs-comment'>-- | /O(n)/ The 'partitionBy' function takes a predicate and a 'Text',</span>
<a name="line-1277"></a><span class='hs-comment'>-- and returns the pair of 'Text's with elements which do and do not</span>
<a name="line-1278"></a><span class='hs-comment'>-- satisfy the predicate, respectively; i.e.</span>
<a name="line-1279"></a><span class='hs-comment'>--</span>
<a name="line-1280"></a><span class='hs-comment'>-- > partitionBy p t == (filter p t, filter (not . p) t)</span>
<a name="line-1281"></a><span class='hs-definition'>partitionBy</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</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-conid'>Text</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-conid'>Text</span><span class='hs-layout'>)</span>
<a name="line-1282"></a><span class='hs-definition'>partitionBy</span> <span class='hs-varid'>p</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>filter</span> <span class='hs-varid'>p</span> <span class='hs-varid'>t</span><span class='hs-layout'>,</span> <span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-varop'>.</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-1283"></a><span class='hs-comment'>{-# INLINE partitionBy #-}</span>
<a name="line-1284"></a>
<a name="line-1285"></a><a name="index"></a><span class='hs-comment'>-- | /O(n)/ 'Text' index (subscript) operator, starting from 0.</span>
<a name="line-1286"></a><span class='hs-definition'>index</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int64</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span>
<a name="line-1287"></a><span class='hs-definition'>index</span> <span class='hs-varid'>t</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>index</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varid'>n</span>
<a name="line-1288"></a><span class='hs-comment'>{-# INLINE index #-}</span>
<a name="line-1289"></a>
<a name="line-1290"></a><a name="count"></a><span class='hs-comment'>-- | /O(n+m)/ The 'count' function returns the number of times the</span>
<a name="line-1291"></a><span class='hs-comment'>-- query string appears in the given 'Text'. An empty query string is</span>
<a name="line-1292"></a><span class='hs-comment'>-- invalid, and will cause an error to be raised.</span>
<a name="line-1293"></a><span class='hs-comment'>--</span>
<a name="line-1294"></a><span class='hs-comment'>-- In (unlikely) bad cases, this function's time complexity degrades</span>
<a name="line-1295"></a><span class='hs-comment'>-- towards /O(n*m)/.</span>
<a name="line-1296"></a><span class='hs-definition'>count</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int64</span>
<a name="line-1297"></a><span class='hs-definition'>count</span> <span class='hs-varid'>pat</span> <span class='hs-varid'>src</span>
<a name="line-1298"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>null</span> <span class='hs-varid'>pat</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>emptyError</span> <span class='hs-str'>"count"</span>
<a name="line-1299"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span> <span class='hs-num'>0</span> <span class='hs-layout'>(</span><span class='hs-varid'>indices</span> <span class='hs-varid'>pat</span> <span class='hs-varid'>src</span><span class='hs-layout'>)</span>
<a name="line-1300"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>go</span> <span class='hs-varop'>!</span><span class='hs-varid'>n</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>n</span>
<a name="line-1301"></a> <span class='hs-varid'>go</span> <span class='hs-varop'>!</span><span class='hs-varid'>n</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</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'>go</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span>
<a name="line-1302"></a><span class='hs-comment'>{-# INLINE [1] count #-}</span>
<a name="line-1303"></a>
<a name="line-1304"></a><span class='hs-comment'>{-# RULES
<a name="line-1305"></a>"LAZY TEXT count/singleton -> countChar" [~1] forall c t.
<a name="line-1306"></a> count (singleton c) t = countChar c t
<a name="line-1307"></a> #-}</span>
<a name="line-1308"></a>
<a name="line-1309"></a><a name="countChar"></a><span class='hs-comment'>-- | /O(n)/ The 'countChar' function returns the number of times the</span>
<a name="line-1310"></a><span class='hs-comment'>-- query element appears in the given 'Text'. This function is subject</span>
<a name="line-1311"></a><span class='hs-comment'>-- to fusion.</span>
<a name="line-1312"></a><span class='hs-definition'>countChar</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int64</span>
<a name="line-1313"></a><span class='hs-definition'>countChar</span> <span class='hs-varid'>c</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>countChar</span> <span class='hs-varid'>c</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-1314"></a>
<a name="line-1315"></a><a name="zip"></a><span class='hs-comment'>-- | /O(n)/ 'zip' takes two 'Text's and returns a list of</span>
<a name="line-1316"></a><span class='hs-comment'>-- corresponding pairs of bytes. If one input 'Text' is short,</span>
<a name="line-1317"></a><span class='hs-comment'>-- excess elements of the longer 'Text' are discarded. This is</span>
<a name="line-1318"></a><span class='hs-comment'>-- equivalent to a pair of 'unpack' operations.</span>
<a name="line-1319"></a><span class='hs-definition'>zip</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>Char</span><span class='hs-layout'>,</span><span class='hs-conid'>Char</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-1320"></a><span class='hs-definition'>zip</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>unstreamList</span> <span class='hs-varop'>$</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>zipWith</span> <span class='hs-conid'>(,)</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-1321"></a><span class='hs-comment'>{-# INLINE [0] zip #-}</span>
<a name="line-1322"></a>
<a name="line-1323"></a><a name="zipWith"></a><span class='hs-comment'>-- | /O(n)/ 'zipWith' generalises 'zip' by zipping with the function</span>
<a name="line-1324"></a><span class='hs-comment'>-- given as the first argument, instead of a tupling function.</span>
<a name="line-1325"></a><span class='hs-definition'>zipWith</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-1326"></a><span class='hs-definition'>zipWith</span> <span class='hs-varid'>f</span> <span class='hs-varid'>t1</span> <span class='hs-varid'>t2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unstream</span> <span class='hs-layout'>(</span><span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>zipWith</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>stream</span> <span class='hs-varid'>t2</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-1327"></a><span class='hs-comment'>{-# INLINE [0] zipWith #-}</span>
<a name="line-1328"></a>
<a name="line-1329"></a><a name="revChunks"></a><span class='hs-definition'>revChunks</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-1330"></a><span class='hs-definition'>revChunks</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-varid'>foldl'</span> <span class='hs-layout'>(</span><span class='hs-varid'>flip</span> <span class='hs-varid'>chunk</span><span class='hs-layout'>)</span> <span class='hs-conid'>Empty</span>
<a name="line-1331"></a>
<a name="line-1332"></a><a name="emptyError"></a><span class='hs-definition'>emptyError</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-1333"></a><span class='hs-definition'>emptyError</span> <span class='hs-varid'>fun</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>P</span><span class='hs-varop'>.</span><span class='hs-varid'>error</span> <span class='hs-layout'>(</span><span class='hs-str'>"Data.Text.Lazy."</span> <span class='hs-varop'>++</span> <span class='hs-varid'>fun</span> <span class='hs-varop'>++</span> <span class='hs-str'>": empty input"</span><span class='hs-layout'>)</span>
<a name="line-1334"></a>
<a name="line-1335"></a><a name="impossibleError"></a><span class='hs-definition'>impossibleError</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-1336"></a><span class='hs-definition'>impossibleError</span> <span class='hs-varid'>fun</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>P</span><span class='hs-varop'>.</span><span class='hs-varid'>error</span> <span class='hs-layout'>(</span><span class='hs-str'>"Data.Text.Lazy."</span> <span class='hs-varop'>++</span> <span class='hs-varid'>fun</span> <span class='hs-varop'>++</span> <span class='hs-str'>": impossible case"</span><span class='hs-layout'>)</span>
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