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<title>Data/Attoparsec/Text/Internal.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE BangPatterns, CPP, FlexibleInstances, GADTs, OverloadedStrings,
<a name="line-2"></a> Rank2Types, RecordWildCards, TypeFamilies, TypeSynonymInstances #-}</span>
<a name="line-3"></a><span class='hs-comment'>{-# OPTIONS_GHC -fno-warn-orphans #-}</span>
<a name="line-4"></a><span class='hs-comment'>-- |</span>
<a name="line-5"></a><span class='hs-comment'>-- Module : Data.Attoparsec.Text.Internal</span>
<a name="line-6"></a><span class='hs-comment'>-- Copyright : Bryan O'Sullivan 2007-2015</span>
<a name="line-7"></a><span class='hs-comment'>-- License : BSD3</span>
<a name="line-8"></a><span class='hs-comment'>--</span>
<a name="line-9"></a><span class='hs-comment'>-- Maintainer : bos@serpentine.com</span>
<a name="line-10"></a><span class='hs-comment'>-- Stability : experimental</span>
<a name="line-11"></a><span class='hs-comment'>-- Portability : unknown</span>
<a name="line-12"></a><span class='hs-comment'>--</span>
<a name="line-13"></a><span class='hs-comment'>-- Simple, efficient parser combinators for 'Text' strings, loosely</span>
<a name="line-14"></a><span class='hs-comment'>-- based on the Parsec library.</span>
<a name="line-15"></a>
<a name="line-16"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Attoparsec</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span>
<a name="line-17"></a> <span class='hs-layout'>(</span>
<a name="line-18"></a> <span class='hs-comment'>-- * Parser types</span>
<a name="line-19"></a> <span class='hs-conid'>Parser</span>
<a name="line-20"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Result</span>
<a name="line-21"></a>
<a name="line-22"></a> <span class='hs-comment'>-- * Running parsers</span>
<a name="line-23"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>parse</span>
<a name="line-24"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>parseOnly</span>
<a name="line-25"></a>
<a name="line-26"></a> <span class='hs-comment'>-- * Combinators</span>
<a name="line-27"></a> <span class='hs-layout'>,</span> <span class='hs-keyword'>module</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Attoparsec</span><span class='hs-varop'>.</span><span class='hs-conid'>Combinator</span>
<a name="line-28"></a>
<a name="line-29"></a> <span class='hs-comment'>-- * Parsing individual characters</span>
<a name="line-30"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>satisfy</span>
<a name="line-31"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>satisfyWith</span>
<a name="line-32"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>anyChar</span>
<a name="line-33"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>skip</span>
<a name="line-34"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>char</span>
<a name="line-35"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>notChar</span>
<a name="line-36"></a>
<a name="line-37"></a> <span class='hs-comment'>-- ** Lookahead</span>
<a name="line-38"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>peekChar</span>
<a name="line-39"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>peekChar'</span>
<a name="line-40"></a>
<a name="line-41"></a> <span class='hs-comment'>-- ** Character classes</span>
<a name="line-42"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>inClass</span>
<a name="line-43"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>notInClass</span>
<a name="line-44"></a>
<a name="line-45"></a> <span class='hs-comment'>-- * Efficient string handling</span>
<a name="line-46"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>skipWhile</span>
<a name="line-47"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>string</span>
<a name="line-48"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>stringCI</span>
<a name="line-49"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>asciiCI</span>
<a name="line-50"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>take</span>
<a name="line-51"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>scan</span>
<a name="line-52"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>runScanner</span>
<a name="line-53"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>takeWhile</span>
<a name="line-54"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>takeWhile1</span>
<a name="line-55"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>takeTill</span>
<a name="line-56"></a>
<a name="line-57"></a> <span class='hs-comment'>-- ** Consume all remaining input</span>
<a name="line-58"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>takeText</span>
<a name="line-59"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>takeLazyText</span>
<a name="line-60"></a>
<a name="line-61"></a> <span class='hs-comment'>-- * Utilities</span>
<a name="line-62"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>endOfLine</span>
<a name="line-63"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>endOfInput</span>
<a name="line-64"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>match</span>
<a name="line-65"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>atEnd</span>
<a name="line-66"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-67"></a>
<a name="line-68"></a><span class='hs-cpp'>#if !MIN_VERSION_base(4,8,0)</span>
<a name="line-69"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Applicative</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-70"></a><span class='hs-cpp'>#endif</span>
<a name="line-71"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Applicative</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-72"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span> <span class='hs-layout'>(</span><span class='hs-varid'>when</span><span class='hs-layout'>)</span>
<a name="line-73"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Attoparsec</span><span class='hs-varop'>.</span><span class='hs-conid'>Combinator</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-74"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Attoparsec</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span>
<a name="line-75"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Attoparsec</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-conid'>Parser</span><span class='hs-layout'>,</span> <span class='hs-conid'>Failure</span><span class='hs-layout'>,</span> <span class='hs-conid'>Success</span><span class='hs-layout'>)</span>
<a name="line-76"></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'>Attoparsec</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Buffer</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Buf</span>
<a name="line-77"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Attoparsec</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Buffer</span> <span class='hs-layout'>(</span><span class='hs-conid'>Buffer</span><span class='hs-layout'>,</span> <span class='hs-varid'>buffer</span><span class='hs-layout'>)</span>
<a name="line-78"></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'>chr</span><span class='hs-layout'>,</span> <span class='hs-varid'>ord</span><span class='hs-layout'>)</span>
<a name="line-79"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span> <span class='hs-layout'>(</span><span class='hs-varid'>intercalate</span><span class='hs-layout'>)</span>
<a name="line-80"></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-81"></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-conid'>Text</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-82"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Prelude</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-varid'>getChar</span><span class='hs-layout'>,</span> <span class='hs-varid'>succ</span><span class='hs-layout'>,</span> <span class='hs-varid'>take</span><span class='hs-layout'>,</span> <span class='hs-varid'>takeWhile</span><span class='hs-layout'>)</span>
<a name="line-83"></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'>Attoparsec</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>T</span>
<a name="line-84"></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'>Attoparsec</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>FastSet</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Set</span>
<a name="line-85"></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-86"></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-keyword'>as</span> <span class='hs-conid'>L</span>
<a name="line-87"></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-88"></a>
<a name="line-89"></a><a name="Parser"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Parser</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Parser</span> <span class='hs-conid'>Text</span>
<a name="line-90"></a><a name="Result"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Result</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IResult</span> <span class='hs-conid'>Text</span>
<a name="line-91"></a><a name="Failure"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Failure</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Failure</span> <span class='hs-conid'>Text</span> <span class='hs-conid'>Buffer</span> <span class='hs-varid'>r</span>
<a name="line-92"></a><a name="Success"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Success</span> <span class='hs-varid'>a</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Success</span> <span class='hs-conid'>Text</span> <span class='hs-conid'>Buffer</span> <span class='hs-varid'>a</span> <span class='hs-varid'>r</span>
<a name="line-93"></a>
<a name="line-94"></a><a name="instance%20IsString%20(Parser%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</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'>IsString</span> <span class='hs-layout'>(</span><span class='hs-conid'>Parser</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-95"></a> <span class='hs-varid'>fromString</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>string</span> <span class='hs-varop'>.</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span>
<a name="line-96"></a>
<a name="line-97"></a><a name="satisfy"></a><span class='hs-comment'>-- | The parser @satisfy p@ succeeds for any character for which the</span>
<a name="line-98"></a><span class='hs-comment'>-- predicate @p@ returns 'True'. Returns the character that is</span>
<a name="line-99"></a><span class='hs-comment'>-- actually parsed.</span>
<a name="line-100"></a><span class='hs-comment'>--</span>
<a name="line-101"></a><span class='hs-comment'>-- >digit = satisfy isDigit</span>
<a name="line-102"></a><span class='hs-comment'>-- > where isDigit c = c >= '0' && c <= '9'</span>
<a name="line-103"></a><span class='hs-definition'>satisfy</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'>Parser</span> <span class='hs-conid'>Char</span>
<a name="line-104"></a><span class='hs-definition'>satisfy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-105"></a> <span class='hs-layout'>(</span><span class='hs-varid'>k</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-varid'>ensure</span> <span class='hs-num'>1</span>
<a name="line-106"></a> <span class='hs-keyword'>let</span> <span class='hs-varop'>!</span><span class='hs-varid'>h</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'>c</span>
<a name="line-107"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>p</span> <span class='hs-varid'>h</span>
<a name="line-108"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>advance</span> <span class='hs-varid'>k</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-varid'>h</span>
<a name="line-109"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>fail</span> <span class='hs-str'>"satisfy"</span>
<a name="line-110"></a><span class='hs-comment'>{-# INLINE satisfy #-}</span>
<a name="line-111"></a>
<a name="line-112"></a><a name="skip"></a><span class='hs-comment'>-- | The parser @skip p@ succeeds for any character for which the</span>
<a name="line-113"></a><span class='hs-comment'>-- predicate @p@ returns 'True'.</span>
<a name="line-114"></a><span class='hs-comment'>--</span>
<a name="line-115"></a><span class='hs-comment'>-- >skipDigit = skip isDigit</span>
<a name="line-116"></a><span class='hs-comment'>-- > where isDigit c = c >= '0' && c <= '9'</span>
<a name="line-117"></a><span class='hs-definition'>skip</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'>Parser</span> <span class='hs-conid'>()</span>
<a name="line-118"></a><span class='hs-definition'>skip</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-119"></a> <span class='hs-layout'>(</span><span class='hs-varid'>k</span><span class='hs-layout'>,</span><span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ensure</span> <span class='hs-num'>1</span>
<a name="line-120"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>p</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'>s</span><span class='hs-layout'>)</span>
<a name="line-121"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>advance</span> <span class='hs-varid'>k</span>
<a name="line-122"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>fail</span> <span class='hs-str'>"skip"</span>
<a name="line-123"></a>
<a name="line-124"></a><a name="satisfyWith"></a><span class='hs-comment'>-- | The parser @satisfyWith f p@ transforms a character, and succeeds</span>
<a name="line-125"></a><span class='hs-comment'>-- if the predicate @p@ returns 'True' on the transformed value. The</span>
<a name="line-126"></a><span class='hs-comment'>-- parser returns the transformed character that was parsed.</span>
<a name="line-127"></a><span class='hs-definition'>satisfyWith</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-layout'>)</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'>Bool</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-varid'>a</span>
<a name="line-128"></a><span class='hs-definition'>satisfyWith</span> <span class='hs-varid'>f</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-129"></a> <span class='hs-layout'>(</span><span class='hs-varid'>k</span><span class='hs-layout'>,</span><span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ensure</span> <span class='hs-num'>1</span>
<a name="line-130"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varop'>$!</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>unsafeHead</span> <span class='hs-varid'>s</span>
<a name="line-131"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>p</span> <span class='hs-varid'>c</span>
<a name="line-132"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>advance</span> <span class='hs-varid'>k</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-varid'>c</span>
<a name="line-133"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>fail</span> <span class='hs-str'>"satisfyWith"</span>
<a name="line-134"></a><span class='hs-comment'>{-# INLINE satisfyWith #-}</span>
<a name="line-135"></a>
<a name="line-136"></a><a name="takeWith"></a><span class='hs-comment'>-- | Consume @n@ characters of input, but succeed only if the</span>
<a name="line-137"></a><span class='hs-comment'>-- predicate returns 'True'.</span>
<a name="line-138"></a><span class='hs-definition'>takeWith</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Text</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'>Parser</span> <span class='hs-conid'>Text</span>
<a name="line-139"></a><span class='hs-definition'>takeWith</span> <span class='hs-varid'>n</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-140"></a> <span class='hs-layout'>(</span><span class='hs-varid'>k</span><span class='hs-layout'>,</span><span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ensure</span> <span class='hs-varid'>n</span>
<a name="line-141"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>p</span> <span class='hs-varid'>s</span>
<a name="line-142"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>advance</span> <span class='hs-varid'>k</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-varid'>s</span>
<a name="line-143"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>fail</span> <span class='hs-str'>"takeWith"</span>
<a name="line-144"></a>
<a name="line-145"></a><a name="take"></a><span class='hs-comment'>-- | Consume exactly @n@ characters of input.</span>
<a name="line-146"></a><span class='hs-definition'>take</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>Text</span>
<a name="line-147"></a><span class='hs-definition'>take</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>takeWith</span> <span class='hs-layout'>(</span><span class='hs-varid'>max</span> <span class='hs-varid'>n</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>const</span> <span class='hs-conid'>True</span><span class='hs-layout'>)</span>
<a name="line-148"></a><span class='hs-comment'>{-# INLINE take #-}</span>
<a name="line-149"></a>
<a name="line-150"></a><a name="string"></a><span class='hs-comment'>-- | @string s@ parses a sequence of characters that identically match</span>
<a name="line-151"></a><span class='hs-comment'>-- @s@. Returns the parsed string (i.e. @s@). This parser consumes no</span>
<a name="line-152"></a><span class='hs-comment'>-- input if it fails (even if a partial match).</span>
<a name="line-153"></a><span class='hs-comment'>--</span>
<a name="line-154"></a><span class='hs-comment'>-- /Note/: The behaviour of this parser is different to that of the</span>
<a name="line-155"></a><span class='hs-comment'>-- similarly-named parser in Parsec, as this one is all-or-nothing.</span>
<a name="line-156"></a><span class='hs-comment'>-- To illustrate the difference, the following parser will fail under</span>
<a name="line-157"></a><span class='hs-comment'>-- Parsec given an input of @\"for\"@:</span>
<a name="line-158"></a><span class='hs-comment'>--</span>
<a name="line-159"></a><span class='hs-comment'>-- >string "foo" <|> string "for"</span>
<a name="line-160"></a><span class='hs-comment'>--</span>
<a name="line-161"></a><span class='hs-comment'>-- The reason for its failure is that the first branch is a</span>
<a name="line-162"></a><span class='hs-comment'>-- partial match, and will consume the letters @\'f\'@ and @\'o\'@</span>
<a name="line-163"></a><span class='hs-comment'>-- before failing. In attoparsec, the above parser will /succeed/ on</span>
<a name="line-164"></a><span class='hs-comment'>-- that input, because the failed first branch will consume nothing.</span>
<a name="line-165"></a><span class='hs-definition'>string</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>Text</span>
<a name="line-166"></a><span class='hs-definition'>string</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>string_</span> <span class='hs-layout'>(</span><span class='hs-varid'>stringSuspended</span> <span class='hs-varid'>id</span><span class='hs-layout'>)</span> <span class='hs-varid'>id</span> <span class='hs-varid'>s</span>
<a name="line-167"></a><span class='hs-comment'>{-# INLINE string #-}</span>
<a name="line-168"></a>
<a name="line-169"></a><a name="string_"></a><span class='hs-definition'>string_</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-keyword'>forall</span> <span class='hs-varid'>r</span><span class='hs-varop'>.</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'>Buffer</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Pos</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>More</span>
<a name="line-170"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Failure</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Success</span> <span class='hs-conid'>Text</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Result</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span>
<a name="line-171"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span><span class='hs-layout'>)</span>
<a name="line-172"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>Text</span>
<a name="line-173"></a><span class='hs-definition'>string_</span> <span class='hs-varid'>suspended</span> <span class='hs-varid'>f</span> <span class='hs-varid'>s0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Parser</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-varid'>lose</span> <span class='hs-varid'>succ</span> <span class='hs-keyglyph'>-></span>
<a name="line-174"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>s0</span>
<a name="line-175"></a> <span class='hs-varid'>ft</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Buf</span><span class='hs-varop'>.</span><span class='hs-varid'>unbufferAt</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromPos</span> <span class='hs-varid'>pos</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-176"></a> <span class='hs-keyword'>in</span> <span class='hs-keyword'>case</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>commonPrefixes</span> <span class='hs-varid'>s</span> <span class='hs-varid'>ft</span> <span class='hs-keyword'>of</span>
<a name="line-177"></a> <span class='hs-conid'>Nothing</span>
<a name="line-178"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>succ</span> <span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span>
<a name="line-179"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>ft</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>suspended</span> <span class='hs-varid'>s</span> <span class='hs-varid'>s</span> <span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-varid'>lose</span> <span class='hs-varid'>succ</span>
<a name="line-180"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>lose</span> <span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-conid'>[]</span> <span class='hs-str'>"string"</span>
<a name="line-181"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>pfx</span><span class='hs-layout'>,</span><span class='hs-varid'>ssfx</span><span class='hs-layout'>,</span><span class='hs-varid'>tsfx</span><span class='hs-layout'>)</span>
<a name="line-182"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>ssfx</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>let</span> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Pos</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>lengthWord16</span> <span class='hs-varid'>pfx</span><span class='hs-layout'>)</span>
<a name="line-183"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>succ</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-varid'>pos</span> <span class='hs-varop'>+</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varid'>more</span> <span class='hs-layout'>(</span><span class='hs-varid'>substring</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>l</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-184"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>not</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>tsfx</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>lose</span> <span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-conid'>[]</span> <span class='hs-str'>"string"</span>
<a name="line-185"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>suspended</span> <span class='hs-varid'>s</span> <span class='hs-varid'>ssfx</span> <span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-varid'>lose</span> <span class='hs-varid'>succ</span>
<a name="line-186"></a><span class='hs-comment'>{-# INLINE string_ #-}</span>
<a name="line-187"></a>
<a name="line-188"></a><a name="stringSuspended"></a><span class='hs-definition'>stringSuspended</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span><span class='hs-layout'>)</span>
<a name="line-189"></a> <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'>Buffer</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Pos</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>More</span>
<a name="line-190"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Failure</span> <span class='hs-varid'>r</span>
<a name="line-191"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Success</span> <span class='hs-conid'>Text</span> <span class='hs-varid'>r</span>
<a name="line-192"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Result</span> <span class='hs-varid'>r</span>
<a name="line-193"></a><span class='hs-definition'>stringSuspended</span> <span class='hs-varid'>f</span> <span class='hs-varid'>s000</span> <span class='hs-varid'>s0</span> <span class='hs-varid'>t0</span> <span class='hs-varid'>pos0</span> <span class='hs-varid'>more0</span> <span class='hs-varid'>lose0</span> <span class='hs-varid'>succ0</span> <span class='hs-keyglyph'>=</span>
<a name="line-194"></a> <span class='hs-varid'>runParser</span> <span class='hs-layout'>(</span><span class='hs-varid'>demandInput_</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>go</span><span class='hs-layout'>)</span> <span class='hs-varid'>t0</span> <span class='hs-varid'>pos0</span> <span class='hs-varid'>more0</span> <span class='hs-varid'>lose0</span> <span class='hs-varid'>succ0</span>
<a name="line-195"></a> <span class='hs-keyword'>where</span>
<a name="line-196"></a> <span class='hs-varid'>go</span> <span class='hs-varid'>s'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Parser</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-varid'>lose</span> <span class='hs-varid'>succ</span> <span class='hs-keyglyph'>-></span>
<a name="line-197"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>s'</span>
<a name="line-198"></a> <span class='hs-keyword'>in</span> <span class='hs-keyword'>case</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>commonPrefixes</span> <span class='hs-varid'>s0</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>of</span>
<a name="line-199"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>lose</span> <span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-conid'>[]</span> <span class='hs-str'>"string"</span>
<a name="line-200"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-sel'>_pfx</span><span class='hs-layout'>,</span><span class='hs-varid'>ssfx</span><span class='hs-layout'>,</span><span class='hs-varid'>tsfx</span><span class='hs-layout'>)</span>
<a name="line-201"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>ssfx</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>let</span> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Pos</span> <span class='hs-layout'>(</span><span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>lengthWord16</span> <span class='hs-varid'>s000</span><span class='hs-layout'>)</span>
<a name="line-202"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>succ</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-varid'>pos</span> <span class='hs-varop'>+</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varid'>more</span> <span class='hs-layout'>(</span><span class='hs-varid'>substring</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>l</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-203"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>tsfx</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>stringSuspended</span> <span class='hs-varid'>f</span> <span class='hs-varid'>s000</span> <span class='hs-varid'>ssfx</span> <span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-varid'>lose</span> <span class='hs-varid'>succ</span>
<a name="line-204"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>lose</span> <span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-conid'>[]</span> <span class='hs-str'>"string"</span>
<a name="line-205"></a>
<a name="line-206"></a><a name="stringCI"></a><span class='hs-comment'>-- | Satisfy a literal string, ignoring case.</span>
<a name="line-207"></a><span class='hs-comment'>--</span>
<a name="line-208"></a><span class='hs-comment'>-- Note: this function is currently quite inefficient. Unicode case</span>
<a name="line-209"></a><span class='hs-comment'>-- folding can change the length of a string (\"&#223;\" becomes</span>
<a name="line-210"></a><span class='hs-comment'>-- "ss"), which makes a simple, efficient implementation tricky. We</span>
<a name="line-211"></a><span class='hs-comment'>-- have (for now) chosen simplicity over efficiency.</span>
<a name="line-212"></a><span class='hs-definition'>stringCI</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>Text</span>
<a name="line-213"></a><span class='hs-definition'>stringCI</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span> <span class='hs-num'>0</span>
<a name="line-214"></a> <span class='hs-keyword'>where</span>
<a name="line-215"></a> <span class='hs-varid'>go</span> <span class='hs-varop'>!</span><span class='hs-varid'>n</span>
<a name="line-216"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>n</span> <span class='hs-varop'>></span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>fs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fail</span> <span class='hs-str'>"stringCI"</span>
<a name="line-217"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-218"></a> <span class='hs-layout'>(</span><span class='hs-varid'>k</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'>ensure</span> <span class='hs-varid'>n</span>
<a name="line-219"></a> <span class='hs-keyword'>if</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>toCaseFold</span> <span class='hs-varid'>t</span> <span class='hs-varop'>==</span> <span class='hs-varid'>fs</span>
<a name="line-220"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>advance</span> <span class='hs-varid'>k</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-varid'>t</span>
<a name="line-221"></a> <span class='hs-keyword'>else</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>
<a name="line-222"></a> <span class='hs-varid'>fs</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>toCaseFold</span> <span class='hs-varid'>s</span>
<a name="line-223"></a><span class='hs-comment'>{-# INLINE stringCI #-}</span>
<a name="line-224"></a><span class='hs-comment'>{-# DEPRECATED stringCI "this is very inefficient, use asciiCI instead" #-}</span>
<a name="line-225"></a>
<a name="line-226"></a><a name="asciiCI"></a><span class='hs-comment'>-- | Satisfy a literal string, ignoring case for characters in the ASCII range.</span>
<a name="line-227"></a><span class='hs-definition'>asciiCI</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>Text</span>
<a name="line-228"></a><span class='hs-definition'>asciiCI</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>string_</span> <span class='hs-layout'>(</span><span class='hs-varid'>stringSuspended</span> <span class='hs-varid'>asciiToLower</span><span class='hs-layout'>)</span> <span class='hs-varid'>asciiToLower</span> <span class='hs-varid'>s</span>
<a name="line-229"></a> <span class='hs-keyword'>where</span>
<a name="line-230"></a> <span class='hs-varid'>asciiToLower</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>map</span> <span class='hs-varid'>f</span>
<a name="line-231"></a> <span class='hs-keyword'>where</span>
<a name="line-232"></a> <span class='hs-varid'>offset</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ord</span> <span class='hs-chr'>'a'</span> <span class='hs-comment'>-</span> <span class='hs-varid'>ord</span> <span class='hs-chr'>'A'</span>
<a name="line-233"></a> <span class='hs-varid'>f</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>|</span> <span class='hs-chr'>'A'</span> <span class='hs-varop'><=</span> <span class='hs-varid'>c</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>c</span> <span class='hs-varop'><=</span> <span class='hs-chr'>'Z'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>chr</span> <span class='hs-layout'>(</span><span class='hs-varid'>ord</span> <span class='hs-varid'>c</span> <span class='hs-varop'>+</span> <span class='hs-varid'>offset</span><span class='hs-layout'>)</span>
<a name="line-234"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>c</span>
<a name="line-235"></a><span class='hs-comment'>{-# INLINE asciiCI #-}</span>
<a name="line-236"></a>
<a name="line-237"></a><a name="skipWhile"></a><span class='hs-comment'>-- | Skip past input for as long as the predicate returns 'True'.</span>
<a name="line-238"></a><span class='hs-definition'>skipWhile</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'>Parser</span> <span class='hs-conid'>()</span>
<a name="line-239"></a><span class='hs-definition'>skipWhile</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span>
<a name="line-240"></a> <span class='hs-keyword'>where</span>
<a name="line-241"></a> <span class='hs-varid'>go</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-242"></a> <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'>takeWhile</span> <span class='hs-varid'>p</span> <span class='hs-varop'><$></span> <span class='hs-varid'>get</span>
<a name="line-243"></a> <span class='hs-varid'>continue</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>inputSpansChunks</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-244"></a> <span class='hs-varid'>when</span> <span class='hs-varid'>continue</span> <span class='hs-varid'>go</span>
<a name="line-245"></a><span class='hs-comment'>{-# INLINE skipWhile #-}</span>
<a name="line-246"></a>
<a name="line-247"></a><a name="takeTill"></a><span class='hs-comment'>-- | Consume input as long as the predicate returns 'False'</span>
<a name="line-248"></a><span class='hs-comment'>-- (i.e. until it returns 'True'), and return the consumed input.</span>
<a name="line-249"></a><span class='hs-comment'>--</span>
<a name="line-250"></a><span class='hs-comment'>-- This parser does not fail. It will return an empty string if the</span>
<a name="line-251"></a><span class='hs-comment'>-- predicate returns 'True' on the first character of input.</span>
<a name="line-252"></a><span class='hs-comment'>--</span>
<a name="line-253"></a><span class='hs-comment'>-- /Note/: Because this parser does not fail, do not use it with</span>
<a name="line-254"></a><span class='hs-comment'>-- combinators such as 'Control.Applicative.many', because such</span>
<a name="line-255"></a><span class='hs-comment'>-- parsers loop until a failure occurs. Careless use will thus result</span>
<a name="line-256"></a><span class='hs-comment'>-- in an infinite loop.</span>
<a name="line-257"></a><span class='hs-definition'>takeTill</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'>Parser</span> <span class='hs-conid'>Text</span>
<a name="line-258"></a><span class='hs-definition'>takeTill</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>takeWhile</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-259"></a><span class='hs-comment'>{-# INLINE takeTill #-}</span>
<a name="line-260"></a>
<a name="line-261"></a><a name="takeWhile"></a><span class='hs-comment'>-- | Consume input as long as the predicate returns 'True', and return</span>
<a name="line-262"></a><span class='hs-comment'>-- the consumed input.</span>
<a name="line-263"></a><span class='hs-comment'>--</span>
<a name="line-264"></a><span class='hs-comment'>-- This parser does not fail. It will return an empty string if the</span>
<a name="line-265"></a><span class='hs-comment'>-- predicate returns 'False' on the first character of input.</span>
<a name="line-266"></a><span class='hs-comment'>--</span>
<a name="line-267"></a><span class='hs-comment'>-- /Note/: Because this parser does not fail, do not use it with</span>
<a name="line-268"></a><span class='hs-comment'>-- combinators such as 'Control.Applicative.many', because such</span>
<a name="line-269"></a><span class='hs-comment'>-- parsers loop until a failure occurs. Careless use will thus result</span>
<a name="line-270"></a><span class='hs-comment'>-- in an infinite loop.</span>
<a name="line-271"></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'>Parser</span> <span class='hs-conid'>Text</span>
<a name="line-272"></a><span class='hs-definition'>takeWhile</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-273"></a> <span class='hs-varid'>h</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>takeWhile</span> <span class='hs-varid'>p</span> <span class='hs-varop'><$></span> <span class='hs-varid'>get</span>
<a name="line-274"></a> <span class='hs-varid'>continue</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>inputSpansChunks</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span>
<a name="line-275"></a> <span class='hs-comment'>-- only use slow concat path if necessary</span>
<a name="line-276"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>continue</span>
<a name="line-277"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>takeWhileAcc</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>h</span><span class='hs-keyglyph'>]</span>
<a name="line-278"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-varid'>h</span>
<a name="line-279"></a><span class='hs-comment'>{-# INLINE takeWhile #-}</span>
<a name="line-280"></a>
<a name="line-281"></a><a name="takeWhileAcc"></a><span class='hs-definition'>takeWhileAcc</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-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>Text</span>
<a name="line-282"></a><span class='hs-definition'>takeWhileAcc</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span>
<a name="line-283"></a> <span class='hs-keyword'>where</span>
<a name="line-284"></a> <span class='hs-varid'>go</span> <span class='hs-varid'>acc</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-285"></a> <span class='hs-varid'>h</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>takeWhile</span> <span class='hs-varid'>p</span> <span class='hs-varop'><$></span> <span class='hs-varid'>get</span>
<a name="line-286"></a> <span class='hs-varid'>continue</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>inputSpansChunks</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span>
<a name="line-287"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>continue</span>
<a name="line-288"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>go</span> <span class='hs-layout'>(</span><span class='hs-varid'>h</span><span class='hs-conop'>:</span><span class='hs-varid'>acc</span><span class='hs-layout'>)</span>
<a name="line-289"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>concatReverse</span> <span class='hs-layout'>(</span><span class='hs-varid'>h</span><span class='hs-conop'>:</span><span class='hs-varid'>acc</span><span class='hs-layout'>)</span>
<a name="line-290"></a><span class='hs-comment'>{-# INLINE takeWhileAcc #-}</span>
<a name="line-291"></a>
<a name="line-292"></a><a name="takeRest"></a><span class='hs-definition'>takeRest</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span>
<a name="line-293"></a><span class='hs-definition'>takeRest</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span> <span class='hs-conid'>[]</span>
<a name="line-294"></a> <span class='hs-keyword'>where</span>
<a name="line-295"></a> <span class='hs-varid'>go</span> <span class='hs-varid'>acc</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-296"></a> <span class='hs-varid'>input</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>wantInput</span>
<a name="line-297"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>input</span>
<a name="line-298"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span>
<a name="line-299"></a> <span class='hs-varid'>s</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>get</span>
<a name="line-300"></a> <span class='hs-varid'>advance</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-301"></a> <span class='hs-varid'>go</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>
<a name="line-302"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverse</span> <span class='hs-varid'>acc</span><span class='hs-layout'>)</span>
<a name="line-303"></a>
<a name="line-304"></a><a name="takeText"></a><span class='hs-comment'>-- | Consume all remaining input and return it as a single string.</span>
<a name="line-305"></a><span class='hs-definition'>takeText</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>Text</span>
<a name="line-306"></a><span class='hs-definition'>takeText</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-varop'>`fmap`</span> <span class='hs-varid'>takeRest</span>
<a name="line-307"></a>
<a name="line-308"></a><a name="takeLazyText"></a><span class='hs-comment'>-- | Consume all remaining input and return it as a single string.</span>
<a name="line-309"></a><span class='hs-definition'>takeLazyText</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span>
<a name="line-310"></a><span class='hs-definition'>takeLazyText</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>L</span><span class='hs-varop'>.</span><span class='hs-varid'>fromChunks</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>takeRest</span>
<a name="line-311"></a>
<a name="line-312"></a><a name="Scan"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Scan</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Continue</span> <span class='hs-varid'>s</span>
<a name="line-313"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Finished</span> <span class='hs-varid'>s</span> <span class='hs-comment'>{-# UNPACK #-}</span> <span class='hs-varop'>!</span><span class='hs-conid'>Int</span> <span class='hs-conid'>Text</span>
<a name="line-314"></a>
<a name="line-315"></a><a name="scan_"></a><span class='hs-definition'>scan_</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</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'>Parser</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-varid'>r</span>
<a name="line-316"></a><span class='hs-definition'>scan_</span> <span class='hs-varid'>f</span> <span class='hs-varid'>s0</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>s0</span>
<a name="line-317"></a> <span class='hs-keyword'>where</span>
<a name="line-318"></a> <span class='hs-varid'>scanner</span> <span class='hs-varid'>s</span> <span class='hs-varop'>!</span><span class='hs-varid'>n</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span>
<a name="line-319"></a> <span class='hs-keyword'>case</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>uncons</span> <span class='hs-varid'>t</span> <span class='hs-keyword'>of</span>
<a name="line-320"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</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-keyword'>case</span> <span class='hs-varid'>p</span> <span class='hs-varid'>s</span> <span class='hs-varid'>c</span> <span class='hs-keyword'>of</span>
<a name="line-321"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>s'</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>scanner</span> <span class='hs-varid'>s'</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'>t'</span>
<a name="line-322"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Finished</span> <span class='hs-varid'>s</span> <span class='hs-varid'>n</span> <span class='hs-varid'>t</span>
<a name="line-323"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Continue</span> <span class='hs-varid'>s</span>
<a name="line-324"></a> <span class='hs-varid'>go</span> <span class='hs-varid'>acc</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-325"></a> <span class='hs-varid'>input</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>get</span>
<a name="line-326"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>scanner</span> <span class='hs-varid'>s</span> <span class='hs-num'>0</span> <span class='hs-varid'>input</span> <span class='hs-keyword'>of</span>
<a name="line-327"></a> <span class='hs-conid'>Continue</span> <span class='hs-varid'>s'</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <span class='hs-varid'>continue</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>inputSpansChunks</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varid'>input</span><span class='hs-layout'>)</span>
<a name="line-328"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>continue</span>
<a name="line-329"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>go</span> <span class='hs-layout'>(</span><span class='hs-varid'>input</span> <span class='hs-conop'>:</span> <span class='hs-varid'>acc</span><span class='hs-layout'>)</span> <span class='hs-varid'>s'</span>
<a name="line-330"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>f</span> <span class='hs-varid'>s'</span> <span class='hs-layout'>(</span><span class='hs-varid'>input</span> <span class='hs-conop'>:</span> <span class='hs-varid'>acc</span><span class='hs-layout'>)</span>
<a name="line-331"></a> <span class='hs-conid'>Finished</span> <span class='hs-varid'>s'</span> <span class='hs-varid'>n</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <span class='hs-varid'>advance</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varid'>input</span> <span class='hs-comment'>-</span> <span class='hs-varid'>size</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-332"></a> <span class='hs-varid'>f</span> <span class='hs-varid'>s'</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'>input</span> <span class='hs-conop'>:</span> <span class='hs-varid'>acc</span><span class='hs-layout'>)</span>
<a name="line-333"></a><span class='hs-comment'>{-# INLINE scan_ #-}</span>
<a name="line-334"></a>
<a name="line-335"></a><a name="scan"></a><span class='hs-comment'>-- | A stateful scanner. The predicate consumes and transforms a</span>
<a name="line-336"></a><span class='hs-comment'>-- state argument, and each transformed state is passed to successive</span>
<a name="line-337"></a><span class='hs-comment'>-- invocations of the predicate on each character of the input until one</span>
<a name="line-338"></a><span class='hs-comment'>-- returns 'Nothing' or the input ends.</span>
<a name="line-339"></a><span class='hs-comment'>--</span>
<a name="line-340"></a><span class='hs-comment'>-- This parser does not fail. It will return an empty string if the</span>
<a name="line-341"></a><span class='hs-comment'>-- predicate returns 'Nothing' on the first character of input.</span>
<a name="line-342"></a><span class='hs-comment'>--</span>
<a name="line-343"></a><span class='hs-comment'>-- /Note/: Because this parser does not fail, do not use it with</span>
<a name="line-344"></a><span class='hs-comment'>-- combinators such as 'Control.Applicative.many', because such</span>
<a name="line-345"></a><span class='hs-comment'>-- parsers loop until a failure occurs. Careless use will thus result</span>
<a name="line-346"></a><span class='hs-comment'>-- in an infinite loop.</span>
<a name="line-347"></a><span class='hs-definition'>scan</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>Text</span>
<a name="line-348"></a><span class='hs-definition'>scan</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>scan_</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-keyword'>_</span> <span class='hs-varid'>chunks</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varop'>$!</span> <span class='hs-varid'>concatReverse</span> <span class='hs-varid'>chunks</span>
<a name="line-349"></a><span class='hs-comment'>{-# INLINE scan #-}</span>
<a name="line-350"></a>
<a name="line-351"></a><a name="runScanner"></a><span class='hs-comment'>-- | Like 'scan', but generalized to return the final state of the</span>
<a name="line-352"></a><span class='hs-comment'>-- scanner.</span>
<a name="line-353"></a><span class='hs-definition'>runScanner</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-layout'>(</span><span class='hs-conid'>Text</span><span class='hs-layout'>,</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-354"></a><span class='hs-definition'>runScanner</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>scan_</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>s</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>let</span> <span class='hs-varop'>!</span><span class='hs-varid'>sx</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concatReverse</span> <span class='hs-varid'>xs</span> <span class='hs-keyword'>in</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>sx</span><span class='hs-layout'>,</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-355"></a><span class='hs-comment'>{-# INLINE runScanner #-}</span>
<a name="line-356"></a>
<a name="line-357"></a><a name="takeWhile1"></a><span class='hs-comment'>-- | Consume input as long as the predicate returns 'True', and return</span>
<a name="line-358"></a><span class='hs-comment'>-- the consumed input.</span>
<a name="line-359"></a><span class='hs-comment'>--</span>
<a name="line-360"></a><span class='hs-comment'>-- This parser requires the predicate to succeed on at least one</span>
<a name="line-361"></a><span class='hs-comment'>-- character of input: it will fail if the predicate never returns</span>
<a name="line-362"></a><span class='hs-comment'>-- 'True' or if there is no input left.</span>
<a name="line-363"></a><span class='hs-definition'>takeWhile1</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'>Parser</span> <span class='hs-conid'>Text</span>
<a name="line-364"></a><span class='hs-definition'>takeWhile1</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-365"></a> <span class='hs-layout'>(</span><span class='hs-varop'>`when`</span> <span class='hs-varid'>demandInput</span><span class='hs-layout'>)</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>endOfChunk</span>
<a name="line-366"></a> <span class='hs-varid'>h</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>takeWhile</span> <span class='hs-varid'>p</span> <span class='hs-varop'><$></span> <span class='hs-varid'>get</span>
<a name="line-367"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>size'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>size</span> <span class='hs-varid'>h</span>
<a name="line-368"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>size'</span> <span class='hs-varop'>==</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fail</span> <span class='hs-str'>"takeWhile1"</span>
<a name="line-369"></a> <span class='hs-varid'>advance</span> <span class='hs-varid'>size'</span>
<a name="line-370"></a> <span class='hs-varid'>eoc</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>endOfChunk</span>
<a name="line-371"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>eoc</span>
<a name="line-372"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>takeWhileAcc</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>h</span><span class='hs-keyglyph'>]</span>
<a name="line-373"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-varid'>h</span>
<a name="line-374"></a><span class='hs-comment'>{-# INLINE takeWhile1 #-}</span>
<a name="line-375"></a>
<a name="line-376"></a><a name="inClass"></a><span class='hs-comment'>-- | Match any character in a set.</span>
<a name="line-377"></a><span class='hs-comment'>--</span>
<a name="line-378"></a><span class='hs-comment'>-- >vowel = inClass "aeiou"</span>
<a name="line-379"></a><span class='hs-comment'>--</span>
<a name="line-380"></a><span class='hs-comment'>-- Range notation is supported.</span>
<a name="line-381"></a><span class='hs-comment'>--</span>
<a name="line-382"></a><span class='hs-comment'>-- >halfAlphabet = inClass "a-nA-N"</span>
<a name="line-383"></a><span class='hs-comment'>--</span>
<a name="line-384"></a><span class='hs-comment'>-- To add a literal @\'-\'@ to a set, place it at the beginning or end</span>
<a name="line-385"></a><span class='hs-comment'>-- of the string.</span>
<a name="line-386"></a><span class='hs-definition'>inClass</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-387"></a><span class='hs-definition'>inClass</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varop'>`</span><span class='hs-conid'>Set</span><span class='hs-varop'>.</span><span class='hs-varid'>member</span><span class='hs-varop'>`</span> <span class='hs-varid'>mySet</span><span class='hs-layout'>)</span>
<a name="line-388"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>mySet</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Set</span><span class='hs-varop'>.</span><span class='hs-varid'>charClass</span> <span class='hs-varid'>s</span>
<a name="line-389"></a> <span class='hs-comment'>{-# NOINLINE mySet #-}</span>
<a name="line-390"></a><span class='hs-comment'>{-# INLINE inClass #-}</span>
<a name="line-391"></a>
<a name="line-392"></a><a name="notInClass"></a><span class='hs-comment'>-- | Match any character not in a set.</span>
<a name="line-393"></a><span class='hs-definition'>notInClass</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-394"></a><span class='hs-definition'>notInClass</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>not</span> <span class='hs-varop'>.</span> <span class='hs-varid'>inClass</span> <span class='hs-varid'>s</span>
<a name="line-395"></a><span class='hs-comment'>{-# INLINE notInClass #-}</span>
<a name="line-396"></a>
<a name="line-397"></a><a name="anyChar"></a><span class='hs-comment'>-- | Match any character.</span>
<a name="line-398"></a><span class='hs-definition'>anyChar</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>Char</span>
<a name="line-399"></a><span class='hs-definition'>anyChar</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>satisfy</span> <span class='hs-varop'>$</span> <span class='hs-varid'>const</span> <span class='hs-conid'>True</span>
<a name="line-400"></a><span class='hs-comment'>{-# INLINE anyChar #-}</span>
<a name="line-401"></a>
<a name="line-402"></a><a name="char"></a><span class='hs-comment'>-- | Match a specific character.</span>
<a name="line-403"></a><span class='hs-definition'>char</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>Char</span>
<a name="line-404"></a><span class='hs-definition'>char</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>satisfy</span> <span class='hs-layout'>(</span><span class='hs-varop'>==</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varop'><?></span> <span class='hs-varid'>show</span> <span class='hs-varid'>c</span>
<a name="line-405"></a><span class='hs-comment'>{-# INLINE char #-}</span>
<a name="line-406"></a>
<a name="line-407"></a><a name="notChar"></a><span class='hs-comment'>-- | Match any character except the given one.</span>
<a name="line-408"></a><span class='hs-definition'>notChar</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>Char</span>
<a name="line-409"></a><span class='hs-definition'>notChar</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>satisfy</span> <span class='hs-layout'>(</span><span class='hs-varop'>/=</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varop'><?></span> <span class='hs-str'>"not "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>c</span>
<a name="line-410"></a><span class='hs-comment'>{-# INLINE notChar #-}</span>
<a name="line-411"></a>
<a name="line-412"></a><a name="peekChar"></a><span class='hs-comment'>-- | Match any character, to perform lookahead. Returns 'Nothing' if</span>
<a name="line-413"></a><span class='hs-comment'>-- end of input has been reached. Does not consume any input.</span>
<a name="line-414"></a><span class='hs-comment'>--</span>
<a name="line-415"></a><span class='hs-comment'>-- /Note/: Because this parser does not fail, do not use it with</span>
<a name="line-416"></a><span class='hs-comment'>-- combinators such as 'Control.Applicative.many', because such</span>
<a name="line-417"></a><span class='hs-comment'>-- parsers loop until a failure occurs. Careless use will thus result</span>
<a name="line-418"></a><span class='hs-comment'>-- in an infinite loop.</span>
<a name="line-419"></a><span class='hs-definition'>peekChar</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>Char</span><span class='hs-layout'>)</span>
<a name="line-420"></a><span class='hs-definition'>peekChar</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Parser</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-sel'>_lose</span> <span class='hs-varid'>succ</span> <span class='hs-keyglyph'>-></span>
<a name="line-421"></a> <span class='hs-keyword'>case</span> <span class='hs-conid'>()</span> <span class='hs-keyword'>of</span>
<a name="line-422"></a> <span class='hs-keyword'>_</span><span class='hs-keyglyph'>|</span> <span class='hs-varid'>pos</span> <span class='hs-varop'><</span> <span class='hs-varid'>lengthOf</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span>
<a name="line-423"></a> <span class='hs-keyword'>let</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Iter</span> <span class='hs-varop'>!</span><span class='hs-varid'>c</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Buf</span><span class='hs-varop'>.</span><span class='hs-varid'>iter</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromPos</span> <span class='hs-varid'>pos</span><span class='hs-layout'>)</span>
<a name="line-424"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>succ</span> <span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-425"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>more</span> <span class='hs-varop'>==</span> <span class='hs-conid'>Complete</span> <span class='hs-keyglyph'>-></span>
<a name="line-426"></a> <span class='hs-varid'>succ</span> <span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-conid'>Nothing</span>
<a name="line-427"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>-></span>
<a name="line-428"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>succ'</span> <span class='hs-varid'>t'</span> <span class='hs-varid'>pos'</span> <span class='hs-varid'>more'</span> <span class='hs-keyglyph'>=</span>
<a name="line-429"></a> <span class='hs-keyword'>let</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Iter</span> <span class='hs-varop'>!</span><span class='hs-varid'>c</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Buf</span><span class='hs-varop'>.</span><span class='hs-varid'>iter</span> <span class='hs-varid'>t'</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromPos</span> <span class='hs-varid'>pos'</span><span class='hs-layout'>)</span>
<a name="line-430"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>succ</span> <span class='hs-varid'>t'</span> <span class='hs-varid'>pos'</span> <span class='hs-varid'>more'</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-431"></a> <span class='hs-varid'>lose'</span> <span class='hs-varid'>t'</span> <span class='hs-varid'>pos'</span> <span class='hs-varid'>more'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>succ</span> <span class='hs-varid'>t'</span> <span class='hs-varid'>pos'</span> <span class='hs-varid'>more'</span> <span class='hs-conid'>Nothing</span>
<a name="line-432"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>prompt</span> <span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-varid'>lose'</span> <span class='hs-varid'>succ'</span>
<a name="line-433"></a><span class='hs-comment'>{-# INLINE peekChar #-}</span>
<a name="line-434"></a>
<a name="line-435"></a><a name="peekChar'"></a><span class='hs-comment'>-- | Match any character, to perform lookahead. Does not consume any</span>
<a name="line-436"></a><span class='hs-comment'>-- input, but will fail if end of input has been reached.</span>
<a name="line-437"></a><span class='hs-definition'>peekChar'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>Char</span>
<a name="line-438"></a><span class='hs-definition'>peekChar'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-439"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ensure</span> <span class='hs-num'>1</span>
<a name="line-440"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$!</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-varid'>unsafeHead</span> <span class='hs-varid'>s</span>
<a name="line-441"></a><span class='hs-comment'>{-# INLINE peekChar' #-}</span>
<a name="line-442"></a>
<a name="line-443"></a><a name="endOfLine"></a><span class='hs-comment'>-- | Match either a single newline character @\'\\n\'@, or a carriage</span>
<a name="line-444"></a><span class='hs-comment'>-- return followed by a newline character @\"\\r\\n\"@.</span>
<a name="line-445"></a><span class='hs-definition'>endOfLine</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>()</span>
<a name="line-446"></a><span class='hs-definition'>endOfLine</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>char</span> <span class='hs-chr'>'\n'</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-varop'><|></span> <span class='hs-layout'>(</span><span class='hs-varid'>string</span> <span class='hs-str'>"\r\n"</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span>
<a name="line-447"></a>
<a name="line-448"></a><a name="failK"></a><span class='hs-comment'>-- | Terminal failure continuation.</span>
<a name="line-449"></a><span class='hs-definition'>failK</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Failure</span> <span class='hs-varid'>a</span>
<a name="line-450"></a><span class='hs-definition'>failK</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-conid'>Pos</span> <span class='hs-varid'>pos</span><span class='hs-layout'>)</span> <span class='hs-sel'>_more</span> <span class='hs-varid'>stack</span> <span class='hs-varid'>msg</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Fail</span> <span class='hs-layout'>(</span><span class='hs-conid'>Buf</span><span class='hs-varop'>.</span><span class='hs-varid'>dropWord16</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varid'>stack</span> <span class='hs-varid'>msg</span>
<a name="line-451"></a><span class='hs-comment'>{-# INLINE failK #-}</span>
<a name="line-452"></a>
<a name="line-453"></a><a name="successK"></a><span class='hs-comment'>-- | Terminal success continuation.</span>
<a name="line-454"></a><span class='hs-definition'>successK</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Success</span> <span class='hs-varid'>a</span> <span class='hs-varid'>a</span>
<a name="line-455"></a><span class='hs-definition'>successK</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-conid'>Pos</span> <span class='hs-varid'>pos</span><span class='hs-layout'>)</span> <span class='hs-sel'>_more</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Done</span> <span class='hs-layout'>(</span><span class='hs-conid'>Buf</span><span class='hs-varop'>.</span><span class='hs-varid'>dropWord16</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span>
<a name="line-456"></a><span class='hs-comment'>{-# INLINE successK #-}</span>
<a name="line-457"></a>
<a name="line-458"></a><a name="parse"></a><span class='hs-comment'>-- | Run a parser.</span>
<a name="line-459"></a><span class='hs-definition'>parse</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</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-conid'>Result</span> <span class='hs-varid'>a</span>
<a name="line-460"></a><span class='hs-definition'>parse</span> <span class='hs-varid'>m</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>runParser</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-varid'>buffer</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-num'>0</span> <span class='hs-conid'>Incomplete</span> <span class='hs-varid'>failK</span> <span class='hs-varid'>successK</span>
<a name="line-461"></a><span class='hs-comment'>{-# INLINE parse #-}</span>
<a name="line-462"></a>
<a name="line-463"></a><a name="parseOnly"></a><span class='hs-comment'>-- | Run a parser that cannot be resupplied via a 'Partial' result.</span>
<a name="line-464"></a><span class='hs-comment'>--</span>
<a name="line-465"></a><span class='hs-comment'>-- This function does not force a parser to consume all of its input.</span>
<a name="line-466"></a><span class='hs-comment'>-- Instead, any residual input will be discarded. To force a parser</span>
<a name="line-467"></a><span class='hs-comment'>-- to consume all of its input, use something like this:</span>
<a name="line-468"></a><span class='hs-comment'>--</span>
<a name="line-469"></a><span class='hs-comment'>-- @</span>
<a name="line-470"></a><span class='hs-comment'>--'parseOnly' (myParser 'Control.Applicative.<*' 'endOfInput')</span>
<a name="line-471"></a><span class='hs-comment'>-- @</span>
<a name="line-472"></a><span class='hs-definition'>parseOnly</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</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-conid'>Either</span> <span class='hs-conid'>String</span> <span class='hs-varid'>a</span>
<a name="line-473"></a><span class='hs-definition'>parseOnly</span> <span class='hs-varid'>m</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>runParser</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-varid'>buffer</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-num'>0</span> <span class='hs-conid'>Complete</span> <span class='hs-varid'>failK</span> <span class='hs-varid'>successK</span> <span class='hs-keyword'>of</span>
<a name="line-474"></a> <span class='hs-conid'>Fail</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>err</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Left</span> <span class='hs-varid'>err</span>
<a name="line-475"></a> <span class='hs-conid'>Fail</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>ctxs</span> <span class='hs-varid'>err</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Left</span> <span class='hs-layout'>(</span><span class='hs-varid'>intercalate</span> <span class='hs-str'>" > "</span> <span class='hs-varid'>ctxs</span> <span class='hs-varop'>++</span> <span class='hs-str'>": "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>err</span><span class='hs-layout'>)</span>
<a name="line-476"></a> <span class='hs-conid'>Done</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Right</span> <span class='hs-varid'>a</span>
<a name="line-477"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>error</span> <span class='hs-str'>"parseOnly: impossible error!"</span>
<a name="line-478"></a><span class='hs-comment'>{-# INLINE parseOnly #-}</span>
<a name="line-479"></a>
<a name="line-480"></a><a name="get"></a><span class='hs-definition'>get</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>Text</span>
<a name="line-481"></a><span class='hs-definition'>get</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Parser</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-sel'>_lose</span> <span class='hs-varid'>succ</span> <span class='hs-keyglyph'>-></span>
<a name="line-482"></a> <span class='hs-varid'>succ</span> <span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-layout'>(</span><span class='hs-conid'>Buf</span><span class='hs-varop'>.</span><span class='hs-varid'>dropWord16</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromPos</span> <span class='hs-varid'>pos</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-483"></a><span class='hs-comment'>{-# INLINE get #-}</span>
<a name="line-484"></a>
<a name="line-485"></a><a name="endOfChunk"></a><span class='hs-definition'>endOfChunk</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>Bool</span>
<a name="line-486"></a><span class='hs-definition'>endOfChunk</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Parser</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-sel'>_lose</span> <span class='hs-varid'>succ</span> <span class='hs-keyglyph'>-></span>
<a name="line-487"></a> <span class='hs-varid'>succ</span> <span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-layout'>(</span><span class='hs-varid'>pos</span> <span class='hs-varop'>==</span> <span class='hs-varid'>lengthOf</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-488"></a><span class='hs-comment'>{-# INLINE endOfChunk #-}</span>
<a name="line-489"></a>
<a name="line-490"></a><a name="inputSpansChunks"></a><span class='hs-definition'>inputSpansChunks</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Pos</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>Bool</span>
<a name="line-491"></a><span class='hs-definition'>inputSpansChunks</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Parser</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-varid'>pos_</span> <span class='hs-varid'>more</span> <span class='hs-sel'>_lose</span> <span class='hs-varid'>succ</span> <span class='hs-keyglyph'>-></span>
<a name="line-492"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>pos</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pos_</span> <span class='hs-varop'>+</span> <span class='hs-varid'>i</span>
<a name="line-493"></a> <span class='hs-keyword'>in</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>pos</span> <span class='hs-varop'><</span> <span class='hs-varid'>lengthOf</span> <span class='hs-varid'>t</span> <span class='hs-varop'>||</span> <span class='hs-varid'>more</span> <span class='hs-varop'>==</span> <span class='hs-conid'>Complete</span>
<a name="line-494"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>succ</span> <span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-conid'>False</span>
<a name="line-495"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>lose'</span> <span class='hs-varid'>t'</span> <span class='hs-varid'>pos'</span> <span class='hs-varid'>more'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>succ</span> <span class='hs-varid'>t'</span> <span class='hs-varid'>pos'</span> <span class='hs-varid'>more'</span> <span class='hs-conid'>False</span>
<a name="line-496"></a> <span class='hs-varid'>succ'</span> <span class='hs-varid'>t'</span> <span class='hs-varid'>pos'</span> <span class='hs-varid'>more'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>succ</span> <span class='hs-varid'>t'</span> <span class='hs-varid'>pos'</span> <span class='hs-varid'>more'</span> <span class='hs-conid'>True</span>
<a name="line-497"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>prompt</span> <span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-varid'>lose'</span> <span class='hs-varid'>succ'</span>
<a name="line-498"></a><span class='hs-comment'>{-# INLINE inputSpansChunks #-}</span>
<a name="line-499"></a>
<a name="line-500"></a><a name="advance"></a><span class='hs-definition'>advance</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Pos</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>()</span>
<a name="line-501"></a><span class='hs-definition'>advance</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Parser</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-sel'>_lose</span> <span class='hs-varid'>succ</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>succ</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-varid'>pos</span><span class='hs-varop'>+</span><span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>more</span> <span class='hs-conid'>()</span>
<a name="line-502"></a><span class='hs-comment'>{-# INLINE advance #-}</span>
<a name="line-503"></a>
<a name="line-504"></a><a name="ensureSuspended"></a><span class='hs-definition'>ensureSuspended</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Buffer</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Pos</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>More</span>
<a name="line-505"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Failure</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Success</span> <span class='hs-layout'>(</span><span class='hs-conid'>Pos</span><span class='hs-layout'>,</span> <span class='hs-conid'>Text</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span>
<a name="line-506"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Result</span> <span class='hs-varid'>r</span>
<a name="line-507"></a><span class='hs-definition'>ensureSuspended</span> <span class='hs-varid'>n</span> <span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-varid'>lose</span> <span class='hs-varid'>succ</span> <span class='hs-keyglyph'>=</span>
<a name="line-508"></a> <span class='hs-varid'>runParser</span> <span class='hs-layout'>(</span><span class='hs-varid'>demandInput</span> <span class='hs-varop'>>></span> <span class='hs-varid'>go</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-varid'>lose</span> <span class='hs-varid'>succ</span>
<a name="line-509"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>go</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Parser</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>t'</span> <span class='hs-varid'>pos'</span> <span class='hs-varid'>more'</span> <span class='hs-varid'>lose'</span> <span class='hs-varid'>succ'</span> <span class='hs-keyglyph'>-></span>
<a name="line-510"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>lengthAtLeast</span> <span class='hs-varid'>pos'</span> <span class='hs-varid'>n</span> <span class='hs-varid'>t'</span> <span class='hs-keyword'>of</span>
<a name="line-511"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>n'</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>succ'</span> <span class='hs-varid'>t'</span> <span class='hs-varid'>pos'</span> <span class='hs-varid'>more'</span> <span class='hs-layout'>(</span><span class='hs-varid'>n'</span><span class='hs-layout'>,</span> <span class='hs-varid'>substring</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>n'</span> <span class='hs-varid'>t'</span><span class='hs-layout'>)</span>
<a name="line-512"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>runParser</span> <span class='hs-layout'>(</span><span class='hs-varid'>demandInput</span> <span class='hs-varop'>>></span> <span class='hs-varid'>go</span><span class='hs-layout'>)</span> <span class='hs-varid'>t'</span> <span class='hs-varid'>pos'</span> <span class='hs-varid'>more'</span> <span class='hs-varid'>lose'</span> <span class='hs-varid'>succ'</span>
<a name="line-513"></a>
<a name="line-514"></a><a name="ensure"></a><span class='hs-comment'>-- | If at least @n@ elements of input are available, return the</span>
<a name="line-515"></a><span class='hs-comment'>-- current input, otherwise fail.</span>
<a name="line-516"></a><span class='hs-definition'>ensure</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-layout'>(</span><span class='hs-conid'>Pos</span><span class='hs-layout'>,</span> <span class='hs-conid'>Text</span><span class='hs-layout'>)</span>
<a name="line-517"></a><span class='hs-definition'>ensure</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Parser</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-varid'>lose</span> <span class='hs-varid'>succ</span> <span class='hs-keyglyph'>-></span>
<a name="line-518"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>lengthAtLeast</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>n</span> <span class='hs-varid'>t</span> <span class='hs-keyword'>of</span>
<a name="line-519"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>n'</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>succ</span> <span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-layout'>(</span><span class='hs-varid'>n'</span><span class='hs-layout'>,</span> <span class='hs-varid'>substring</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>n'</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-520"></a> <span class='hs-comment'>-- The uncommon case is kept out-of-line to reduce code size:</span>
<a name="line-521"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>ensureSuspended</span> <span class='hs-varid'>n</span> <span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-varid'>lose</span> <span class='hs-varid'>succ</span>
<a name="line-522"></a><span class='hs-comment'>{-# INLINE ensure #-}</span>
<a name="line-523"></a>
<a name="line-524"></a><a name="match"></a><span class='hs-comment'>-- | Return both the result of a parse and the portion of the input</span>
<a name="line-525"></a><span class='hs-comment'>-- that was consumed while it was being parsed.</span>
<a name="line-526"></a><span class='hs-definition'>match</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-layout'>(</span><span class='hs-conid'>Text</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-527"></a><span class='hs-definition'>match</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>T</span><span class='hs-varop'>.</span><span class='hs-conid'>Parser</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-varid'>lose</span> <span class='hs-varid'>succ</span> <span class='hs-keyglyph'>-></span>
<a name="line-528"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>succ'</span> <span class='hs-varid'>t'</span> <span class='hs-varid'>pos'</span> <span class='hs-varid'>more'</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>succ</span> <span class='hs-varid'>t'</span> <span class='hs-varid'>pos'</span> <span class='hs-varid'>more'</span>
<a name="line-529"></a> <span class='hs-layout'>(</span><span class='hs-varid'>substring</span> <span class='hs-varid'>pos</span> <span class='hs-layout'>(</span><span class='hs-varid'>pos'</span><span class='hs-comment'>-</span><span class='hs-varid'>pos</span><span class='hs-layout'>)</span> <span class='hs-varid'>t'</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-530"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>runParser</span> <span class='hs-varid'>p</span> <span class='hs-varid'>t</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>more</span> <span class='hs-varid'>lose</span> <span class='hs-varid'>succ'</span>
<a name="line-531"></a>
<a name="line-532"></a><a name="lengthAtLeast"></a><span class='hs-comment'>-- | Ensure that at least @n@ code points of input are available.</span>
<a name="line-533"></a><span class='hs-comment'>-- Returns the number of words consumed while traversing.</span>
<a name="line-534"></a><span class='hs-definition'>lengthAtLeast</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Pos</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Buffer</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Pos</span>
<a name="line-535"></a><span class='hs-definition'>lengthAtLeast</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>n</span> <span class='hs-varid'>t</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'>fromPos</span> <span class='hs-varid'>pos</span><span class='hs-layout'>)</span>
<a name="line-536"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>go</span> <span class='hs-varid'>i</span> <span class='hs-varop'>!</span><span class='hs-varid'>p</span>
<a name="line-537"></a> <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'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Pos</span> <span class='hs-varid'>p</span> <span class='hs-comment'>-</span> <span class='hs-varid'>pos</span><span class='hs-layout'>)</span>
<a name="line-538"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>p</span> <span class='hs-varop'>==</span> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-539"></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-layout'>(</span><span class='hs-varid'>i</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span> <span class='hs-varop'>+</span> <span class='hs-conid'>Buf</span><span class='hs-varop'>.</span><span class='hs-varid'>iter_</span> <span class='hs-varid'>t</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-540"></a> <span class='hs-conid'>Pos</span> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lengthOf</span> <span class='hs-varid'>t</span>
<a name="line-541"></a><span class='hs-comment'>{-# INLINE lengthAtLeast #-}</span>
<a name="line-542"></a>
<a name="line-543"></a><a name="substring"></a><span class='hs-definition'>substring</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Pos</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Pos</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Buffer</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span>
<a name="line-544"></a><span class='hs-definition'>substring</span> <span class='hs-layout'>(</span><span class='hs-conid'>Pos</span> <span class='hs-varid'>pos</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Pos</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Buf</span><span class='hs-varop'>.</span><span class='hs-varid'>substring</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>n</span>
<a name="line-545"></a><span class='hs-comment'>{-# INLINE substring #-}</span>
<a name="line-546"></a>
<a name="line-547"></a><a name="lengthOf"></a><span class='hs-definition'>lengthOf</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Buffer</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Pos</span>
<a name="line-548"></a><span class='hs-definition'>lengthOf</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Pos</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Buf</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span>
<a name="line-549"></a>
<a name="line-550"></a><a name="size"></a><span class='hs-definition'>size</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Pos</span>
<a name="line-551"></a><span class='hs-definition'>size</span> <span class='hs-layout'>(</span><span class='hs-conid'>Text</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Pos</span> <span class='hs-varid'>l</span>
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