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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<!-- Generated by HsColour, http://code.haskell.org/~malcolm/hscolour/ -->
<title>src/Text/Parse/ByteString.hs</title>
<link type='text/css' rel='stylesheet' href='hscolour.css' />
</head>
<body>
<pre><a name="line-1"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Parse</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-2"></a>  <span class='hs-layout'>(</span> <span class='hs-comment'>-- * The Parse class is a replacement for the standard Read class. </span>
<a name="line-3"></a>    <span class='hs-comment'>--   This particular instance reads from ByteString rather than String.</span>
<a name="line-4"></a>    <span class='hs-comment'>-- $parser</span>
<a name="line-5"></a>    <span class='hs-conid'>TextParser</span>	<span class='hs-comment'>-- synonym for Text.ParserCombinators.Poly.ByteString</span>
<a name="line-6"></a>  <span class='hs-layout'>,</span> <span class='hs-conid'>Parse</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>	<span class='hs-comment'>-- instances: (), (a,b), (a,b,c), Maybe a, Either a, [a],</span>
<a name="line-7"></a>		<span class='hs-comment'>--            Int, Integer, Float, Double, Char, Bool</span>
<a name="line-8"></a>  <span class='hs-layout'>,</span> <span class='hs-varid'>parseByRead</span>	<span class='hs-comment'>-- :: Read a =&gt; String -&gt; TextParser a</span>
<a name="line-9"></a>  <span class='hs-layout'>,</span> <span class='hs-varid'>readByParse</span> <span class='hs-comment'>-- :: TextParser a -&gt; ReadS a</span>
<a name="line-10"></a>  <span class='hs-layout'>,</span> <span class='hs-varid'>readsPrecByParsePrec</span> <span class='hs-comment'>-- :: (Int-&gt;TextParser a) -&gt; Int -&gt; ReadS a</span>
<a name="line-11"></a>    <span class='hs-comment'>-- ** Combinators specific to bytestring input, lexed haskell-style</span>
<a name="line-12"></a>  <span class='hs-layout'>,</span> <span class='hs-varid'>word</span>	<span class='hs-comment'>-- :: TextParser String</span>
<a name="line-13"></a>  <span class='hs-layout'>,</span> <span class='hs-varid'>isWord</span>	<span class='hs-comment'>-- :: String -&gt; TextParser ()</span>
<a name="line-14"></a>  <span class='hs-layout'>,</span> <span class='hs-varid'>optionalParens</span>	<span class='hs-comment'>-- :: TextParser a -&gt; TextParser a</span>
<a name="line-15"></a>  <span class='hs-layout'>,</span> <span class='hs-varid'>parens</span>	<span class='hs-comment'>-- :: Bool -&gt; TextParser a -&gt; TextParser a</span>
<a name="line-16"></a>  <span class='hs-layout'>,</span> <span class='hs-varid'>field</span>	<span class='hs-comment'>-- :: Parse a =&gt; String -&gt; TextParser a</span>
<a name="line-17"></a>  <span class='hs-layout'>,</span> <span class='hs-varid'>constructors</span><span class='hs-comment'>-- :: [(String,TextParser a)] -&gt; TextParser a</span>
<a name="line-18"></a>  <span class='hs-layout'>,</span> <span class='hs-varid'>enumeration</span> <span class='hs-comment'>-- :: Show a =&gt; String -&gt; [a] -&gt; TextParser a</span>
<a name="line-19"></a>    <span class='hs-comment'>-- ** Parsers for literal numerics and characters</span>
<a name="line-20"></a>  <span class='hs-layout'>,</span> <span class='hs-varid'>parseSigned</span>
<a name="line-21"></a>  <span class='hs-layout'>,</span> <span class='hs-varid'>parseInt</span>
<a name="line-22"></a>  <span class='hs-layout'>,</span> <span class='hs-varid'>parseDec</span>
<a name="line-23"></a>  <span class='hs-layout'>,</span> <span class='hs-varid'>parseOct</span>
<a name="line-24"></a>  <span class='hs-layout'>,</span> <span class='hs-varid'>parseHex</span>
<a name="line-25"></a>  <span class='hs-layout'>,</span> <span class='hs-varid'>parseUnsignedInteger</span>
<a name="line-26"></a>  <span class='hs-layout'>,</span> <span class='hs-varid'>parseFloat</span>
<a name="line-27"></a>  <span class='hs-layout'>,</span> <span class='hs-varid'>parseLitChar</span>
<a name="line-28"></a>    <span class='hs-comment'>-- ** Re-export all the more general combinators from Poly too</span>
<a name="line-29"></a>  <span class='hs-layout'>,</span> <span class='hs-keyword'>module</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>ParserCombinators</span><span class='hs-varop'>.</span><span class='hs-conid'>Poly</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-30"></a>    <span class='hs-comment'>-- ** ByteStrings and Strings as whole entities</span>
<a name="line-31"></a>  <span class='hs-layout'>,</span> <span class='hs-varid'>allAsByteString</span>
<a name="line-32"></a>  <span class='hs-layout'>,</span> <span class='hs-varid'>allAsString</span>
<a name="line-33"></a>  <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-34"></a>
<a name="line-35"></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-keyword'>as</span> <span class='hs-conid'>Char</span> <span class='hs-layout'>(</span><span class='hs-varid'>isUpper</span><span class='hs-layout'>,</span><span class='hs-varid'>isDigit</span><span class='hs-layout'>,</span><span class='hs-varid'>isOctDigit</span><span class='hs-layout'>,</span><span class='hs-varid'>isHexDigit</span><span class='hs-layout'>,</span><span class='hs-varid'>digitToInt</span>
<a name="line-36"></a>                         <span class='hs-layout'>,</span><span class='hs-varid'>isSpace</span><span class='hs-layout'>,</span><span class='hs-varid'>isAlpha</span><span class='hs-layout'>,</span><span class='hs-varid'>isAlphaNum</span><span class='hs-layout'>,</span><span class='hs-varid'>ord</span><span class='hs-layout'>,</span><span class='hs-varid'>chr</span><span class='hs-layout'>,</span><span class='hs-varid'>toLower</span><span class='hs-layout'>)</span>
<a name="line-37"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span> <span class='hs-layout'>(</span><span class='hs-varid'>intersperse</span><span class='hs-layout'>)</span>
<a name="line-38"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Ratio</span>
<a name="line-39"></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'>ByteString</span><span class='hs-varop'>.</span><span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-conid'>Char8</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>BS</span>
<a name="line-40"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-varop'>.</span><span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-conid'>Char8</span> <span class='hs-layout'>(</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>)</span>
<a name="line-41"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>ParserCombinators</span><span class='hs-varop'>.</span><span class='hs-conid'>Poly</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-42"></a>
<a name="line-43"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-44"></a><span class='hs-comment'>-- $parser</span>
<a name="line-45"></a><span class='hs-comment'>-- The Parse class is a replacement for the standard Read class.  It is a</span>
<a name="line-46"></a><span class='hs-comment'>-- specialisation of the (poly) Parser monad for ByteString input.</span>
<a name="line-47"></a><span class='hs-comment'>-- There are instances defined for all Prelude types.</span>
<a name="line-48"></a><span class='hs-comment'>-- For user-defined types, you can write your own instance, or use</span>
<a name="line-49"></a><span class='hs-comment'>-- DrIFT to generate them automatically, e.g. {-! derive : Parse !-}</span>
<a name="line-50"></a>
<a name="line-51"></a><a name="TextParser"></a><span class='hs-comment'>-- | A synonym for a ByteString Parser, i.e. bytestring input (no state)</span>
<a name="line-52"></a><a name="TextParser"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>TextParser</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Parser</span> <span class='hs-varid'>a</span>
<a name="line-53"></a>
<a name="line-54"></a><a name="Parse"></a><span class='hs-comment'>-- | The class @Parse@ is a replacement for @Read@, operating over String input.</span>
<a name="line-55"></a><a name="Parse"></a><span class='hs-comment'>--   Essentially, it permits better error messages for why something failed to</span>
<a name="line-56"></a><a name="Parse"></a><span class='hs-comment'>--   parse.  It is rather important that @parse@ can read back exactly what</span>
<a name="line-57"></a><a name="Parse"></a><span class='hs-comment'>--   is generated by the corresponding instance of @show@.  To apply a parser</span>
<a name="line-58"></a><a name="Parse"></a><span class='hs-comment'>--   to some text, use @runParser@.</span>
<a name="line-59"></a><a name="Parse"></a><span class='hs-keyword'>class</span> <span class='hs-conid'>Parse</span> <span class='hs-varid'>a</span> <span class='hs-keyword'>where</span>
<a name="line-60"></a>    <span class='hs-comment'>-- | A straightforward parser for an item.  (A minimal definition of</span>
<a name="line-61"></a>    <span class='hs-comment'>--   a class instance requires either |parse| or |parsePrec|.  In general,</span>
<a name="line-62"></a>    <span class='hs-comment'>--   for a type that never needs parens, you should define |parse|, but</span>
<a name="line-63"></a>    <span class='hs-comment'>--   for a type that _may_ need parens, you should define |parsePrec|.)</span>
<a name="line-64"></a>    <span class='hs-varid'>parse</span>     <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TextParser</span> <span class='hs-varid'>a</span>
<a name="line-65"></a>    <span class='hs-varid'>parse</span>       <span class='hs-keyglyph'>=</span> <span class='hs-varid'>parsePrec</span> <span class='hs-num'>0</span>
<a name="line-66"></a>    <span class='hs-comment'>-- | A straightforward parser for an item, given the precedence of</span>
<a name="line-67"></a>    <span class='hs-comment'>--   any surrounding expression.  (Precedence determines whether</span>
<a name="line-68"></a>    <span class='hs-comment'>--   parentheses are mandatory or optional.)</span>
<a name="line-69"></a>    <span class='hs-varid'>parsePrec</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>TextParser</span> <span class='hs-varid'>a</span>
<a name="line-70"></a>    <span class='hs-varid'>parsePrec</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>optionalParens</span> <span class='hs-varid'>parse</span>
<a name="line-71"></a>    <span class='hs-comment'>-- | Parsing a list of items by default accepts the [] and comma syntax,</span>
<a name="line-72"></a>    <span class='hs-comment'>--   except when the list is really a character string using \"\".</span>
<a name="line-73"></a>    <span class='hs-varid'>parseList</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TextParser</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span>	<span class='hs-comment'>-- only to distinguish [] and ""</span>
<a name="line-74"></a>    <span class='hs-varid'>parseList</span>  <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-layout'>{</span> <span class='hs-varid'>isWord</span> <span class='hs-str'>"[]"</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-conid'>[]</span> <span class='hs-layout'>}</span>
<a name="line-75"></a>                   <span class='hs-varop'>`onFail`</span>
<a name="line-76"></a>                 <span class='hs-keyword'>do</span> <span class='hs-layout'>{</span> <span class='hs-varid'>isWord</span> <span class='hs-str'>"["</span><span class='hs-layout'>;</span> <span class='hs-varid'>isWord</span> <span class='hs-str'>"]"</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-conid'>[]</span> <span class='hs-layout'>}</span>
<a name="line-77"></a>                   <span class='hs-varop'>`onFail`</span>
<a name="line-78"></a>                 <span class='hs-varid'>bracketSep</span> <span class='hs-layout'>(</span><span class='hs-varid'>isWord</span> <span class='hs-str'>"["</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>isWord</span> <span class='hs-str'>","</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>isWord</span> <span class='hs-str'>"]"</span><span class='hs-layout'>)</span>
<a name="line-79"></a>                            <span class='hs-layout'>(</span><span class='hs-varid'>optionalParens</span> <span class='hs-varid'>parse</span><span class='hs-layout'>)</span>
<a name="line-80"></a>                   <span class='hs-varop'>`adjustErr`</span> <span class='hs-layout'>(</span><span class='hs-str'>"Expected a list, but\n"</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span>
<a name="line-81"></a>
<a name="line-82"></a><a name="parseByRead"></a><span class='hs-comment'>-- | If there already exists a Read instance for a type, then we can make</span>
<a name="line-83"></a><span class='hs-comment'>--   a Parser for it, but with only poor error-reporting.  The string argument</span>
<a name="line-84"></a><span class='hs-comment'>--   is the expected type or value (for error-reporting only).  Use of this</span>
<a name="line-85"></a><span class='hs-comment'>--   wrapper function is NOT recommended with ByteString, because there</span>
<a name="line-86"></a><span class='hs-comment'>--   is a lot of inefficiency in repeated conversions to/from String.</span>
<a name="line-87"></a><span class='hs-definition'>parseByRead</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Read</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=&gt;</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>TextParser</span> <span class='hs-varid'>a</span>
<a name="line-88"></a><span class='hs-definition'>parseByRead</span> <span class='hs-varid'>name</span> <span class='hs-keyglyph'>=</span>
<a name="line-89"></a>    <span class='hs-conid'>P</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>s</span><span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>reads</span> <span class='hs-layout'>(</span><span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-90"></a>                <span class='hs-conid'>[]</span>       <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Failure</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-str'>"no parse, expected a "</span><span class='hs-varop'>++</span><span class='hs-varid'>name</span><span class='hs-layout'>)</span>
<a name="line-91"></a>                <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>a</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-keyglyph'>-&gt;</span> <span class='hs-conid'>Success</span> <span class='hs-layout'>(</span><span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span> <span class='hs-varid'>s'</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span>
<a name="line-92"></a>                <span class='hs-keyword'>_</span>        <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Failure</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-str'>"ambiguous parse, expected a "</span><span class='hs-varop'>++</span><span class='hs-varid'>name</span><span class='hs-layout'>)</span>
<a name="line-93"></a>      <span class='hs-layout'>)</span>
<a name="line-94"></a>
<a name="line-95"></a><a name="readByParse"></a><span class='hs-comment'>-- | If you have a TextParser for a type, you can easily make it into</span>
<a name="line-96"></a><span class='hs-comment'>--   a Read instance, by throwing away any error messages.  Use of this</span>
<a name="line-97"></a><span class='hs-comment'>--   wrapper function is NOT recommended with ByteString, because there</span>
<a name="line-98"></a><span class='hs-comment'>--   is a lot of inefficiency in conversions to/from String.</span>
<a name="line-99"></a><span class='hs-definition'>readByParse</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TextParser</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>ReadS</span> <span class='hs-varid'>a</span>
<a name="line-100"></a><span class='hs-definition'>readByParse</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>inp</span><span class='hs-keyglyph'>-&gt;</span>
<a name="line-101"></a>    <span class='hs-keyword'>case</span> <span class='hs-varid'>runParser</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span> <span class='hs-varid'>inp</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-102"></a>        <span class='hs-layout'>(</span><span class='hs-conid'>Left</span> <span class='hs-varid'>err</span><span class='hs-layout'>,</span>  <span class='hs-varid'>rest</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>[]</span>
<a name="line-103"></a>        <span class='hs-layout'>(</span><span class='hs-conid'>Right</span> <span class='hs-varid'>val</span><span class='hs-layout'>,</span> <span class='hs-varid'>rest</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>val</span><span class='hs-layout'>,</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>rest</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-104"></a>
<a name="line-105"></a><a name="readsPrecByParsePrec"></a><span class='hs-comment'>-- | If you have a TextParser for a type, you can easily make it into</span>
<a name="line-106"></a><span class='hs-comment'>--   a Read instance, by throwing away any error messages.  Use of this</span>
<a name="line-107"></a><span class='hs-comment'>--   wrapper function is NOT recommended with ByteString, because there</span>
<a name="line-108"></a><span class='hs-comment'>--   is a lot of inefficiency in conversions to/from String.</span>
<a name="line-109"></a><span class='hs-definition'>readsPrecByParsePrec</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>TextParser</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>ReadS</span> <span class='hs-varid'>a</span>
<a name="line-110"></a><span class='hs-definition'>readsPrecByParsePrec</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>prec</span> <span class='hs-varid'>inp</span><span class='hs-keyglyph'>-&gt;</span>
<a name="line-111"></a>    <span class='hs-keyword'>case</span> <span class='hs-varid'>runParser</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span> <span class='hs-varid'>prec</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span> <span class='hs-varid'>inp</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-112"></a>        <span class='hs-layout'>(</span><span class='hs-conid'>Left</span> <span class='hs-varid'>err</span><span class='hs-layout'>,</span>  <span class='hs-varid'>rest</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>[]</span>
<a name="line-113"></a>        <span class='hs-layout'>(</span><span class='hs-conid'>Right</span> <span class='hs-varid'>val</span><span class='hs-layout'>,</span> <span class='hs-varid'>rest</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>val</span><span class='hs-layout'>,</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>rest</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-114"></a>
<a name="line-115"></a>
<a name="line-116"></a><a name="word"></a><span class='hs-comment'>-- | One lexical chunk (Haskell-style lexing).</span>
<a name="line-117"></a><span class='hs-definition'>word</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TextParser</span> <span class='hs-conid'>String</span>
<a name="line-118"></a><span class='hs-comment'>{-
<a name="line-119"></a>word = P (\s-&gt; case lex (BS.unpack s) of
<a name="line-120"></a>                   []         -&gt; Failure s  ("no input? (impossible)")
<a name="line-121"></a>                   [("","")]  -&gt; Failure s ("no input?")
<a name="line-122"></a>                   [("",_)]   -&gt; Failure s  ("lexing failed?")
<a name="line-123"></a>                   ((x,_):_)  -&gt; Success (BS.drop (fromIntegral (length x)) s) x
<a name="line-124"></a>         )
<a name="line-125"></a>-}</span>
<a name="line-126"></a><span class='hs-definition'>word</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>P</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span> <span class='hs-varop'>.</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>dropWhile</span> <span class='hs-varid'>isSpace</span><span class='hs-layout'>)</span>
<a name="line-127"></a>  <span class='hs-keyword'>where</span>
<a name="line-128"></a>    <span class='hs-varid'>p</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>BS</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-conid'>Failure</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span> <span class='hs-str'>"end of input"</span>
<a name="line-129"></a>        <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span>
<a name="line-130"></a>      <span class='hs-keyword'>case</span> <span class='hs-layout'>(</span><span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>head</span> <span class='hs-varid'>s</span><span class='hs-layout'>,</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>tail</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-131"></a>        <span class='hs-layout'>(</span><span class='hs-chr'>'\''</span><span class='hs-layout'>,</span><span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-conid'>P</span> <span class='hs-varid'>lit</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>parseLitChar</span> <span class='hs-keyword'>in</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>lit</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-132"></a>        <span class='hs-layout'>(</span><span class='hs-chr'>'\"'</span><span class='hs-layout'>,</span><span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>str</span><span class='hs-layout'>,</span><span class='hs-varid'>rest</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-varop'>`elem`</span> <span class='hs-str'>"\\\""</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span>
<a name="line-133"></a>                    <span class='hs-keyword'>in</span> <span class='hs-varid'>litString</span> <span class='hs-layout'>(</span><span class='hs-chr'>'\"'</span><span class='hs-conop'>:</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>str</span><span class='hs-layout'>)</span> <span class='hs-varid'>rest</span>
<a name="line-134"></a>        <span class='hs-layout'>(</span><span class='hs-chr'>'0'</span><span class='hs-layout'>,</span><span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyword'>case</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>uncons</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>of</span>
<a name="line-135"></a>                     <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-chr'>'x'</span><span class='hs-layout'>,</span><span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Success</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-str'>"0x"</span><span class='hs-varop'>++</span><span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>ds</span><span class='hs-layout'>)</span>
<a name="line-136"></a>                                            <span class='hs-keyword'>where</span> <span class='hs-layout'>(</span><span class='hs-varid'>ds</span><span class='hs-layout'>,</span><span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>span</span> <span class='hs-varid'>isHexDigit</span> <span class='hs-varid'>r</span>
<a name="line-137"></a>                     <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-chr'>'X'</span><span class='hs-layout'>,</span><span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Success</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-str'>"0X"</span><span class='hs-varop'>++</span><span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>ds</span><span class='hs-layout'>)</span>
<a name="line-138"></a>                                            <span class='hs-keyword'>where</span> <span class='hs-layout'>(</span><span class='hs-varid'>ds</span><span class='hs-layout'>,</span><span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>span</span> <span class='hs-varid'>isHexDigit</span> <span class='hs-varid'>r</span>
<a name="line-139"></a>                     <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-chr'>'o'</span><span class='hs-layout'>,</span><span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Success</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-str'>"0o"</span><span class='hs-varop'>++</span><span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>ds</span><span class='hs-layout'>)</span>
<a name="line-140"></a>                                            <span class='hs-keyword'>where</span> <span class='hs-layout'>(</span><span class='hs-varid'>ds</span><span class='hs-layout'>,</span><span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>span</span> <span class='hs-varid'>isOctDigit</span> <span class='hs-varid'>r</span>
<a name="line-141"></a>                     <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-chr'>'O'</span><span class='hs-layout'>,</span><span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Success</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-str'>"0O"</span><span class='hs-varop'>++</span><span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>ds</span><span class='hs-layout'>)</span>
<a name="line-142"></a>                                            <span class='hs-keyword'>where</span> <span class='hs-layout'>(</span><span class='hs-varid'>ds</span><span class='hs-layout'>,</span><span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>span</span> <span class='hs-varid'>isOctDigit</span> <span class='hs-varid'>r</span>
<a name="line-143"></a>                     <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>lexFracExp</span> <span class='hs-layout'>(</span><span class='hs-chr'>'0'</span><span class='hs-conop'>:</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>ds</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span>
<a name="line-144"></a>                                            <span class='hs-keyword'>where</span> <span class='hs-layout'>(</span><span class='hs-varid'>ds</span><span class='hs-layout'>,</span><span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>span</span> <span class='hs-varid'>isDigit</span> <span class='hs-varid'>s</span>
<a name="line-145"></a>        <span class='hs-layout'>(</span><span class='hs-varid'>c</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'>isIdInit</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>nam</span><span class='hs-layout'>,</span><span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>span</span> <span class='hs-varid'>isIdChar</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>in</span>
<a name="line-146"></a>                                                   <span class='hs-conid'>Success</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-conop'>:</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>nam</span><span class='hs-layout'>)</span>
<a name="line-147"></a>              <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isDigit</span>  <span class='hs-varid'>c</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>ds</span><span class='hs-layout'>,</span><span class='hs-varid'>t</span><span class='hs-layout'>)</span>  <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>span</span> <span class='hs-varid'>isDigit</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>in</span>
<a name="line-148"></a>                                                 <span class='hs-varid'>lexFracExp</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-conop'>:</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>ds</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span>
<a name="line-149"></a>              <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isSingle</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Success</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-conop'>:</span><span class='hs-conid'>[]</span><span class='hs-layout'>)</span>
<a name="line-150"></a>              <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isSym</span>    <span class='hs-varid'>c</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>sym</span><span class='hs-layout'>,</span><span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>span</span> <span class='hs-varid'>isSym</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>in</span>
<a name="line-151"></a>                                                   <span class='hs-conid'>Success</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-conop'>:</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>sym</span><span class='hs-layout'>)</span>
<a name="line-152"></a>              <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span>  <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Failure</span> <span class='hs-layout'>(</span><span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>cons</span> <span class='hs-varid'>c</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-str'>"Bad character: "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-153"></a>
<a name="line-154"></a>    <span class='hs-varid'>isSingle</span> <span class='hs-varid'>c</span>  <span class='hs-keyglyph'>=</span>  <span class='hs-varid'>c</span> <span class='hs-varop'>`elem`</span> <span class='hs-str'>",;()[]{}`"</span>
<a name="line-155"></a>    <span class='hs-varid'>isSym</span>    <span class='hs-varid'>c</span>  <span class='hs-keyglyph'>=</span>  <span class='hs-varid'>c</span> <span class='hs-varop'>`elem`</span> <span class='hs-str'>"!@#$%&amp;*+./&lt;=&gt;?\\^|:-~"</span>
<a name="line-156"></a>    <span class='hs-varid'>isIdInit</span> <span class='hs-varid'>c</span>  <span class='hs-keyglyph'>=</span>  <span class='hs-varid'>isAlpha</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'>'_'</span>
<a name="line-157"></a>    <span class='hs-varid'>isIdChar</span> <span class='hs-varid'>c</span>  <span class='hs-keyglyph'>=</span>  <span class='hs-varid'>isAlphaNum</span> <span class='hs-varid'>c</span> <span class='hs-varop'>||</span> <span class='hs-varid'>c</span> <span class='hs-varop'>`elem`</span> <span class='hs-str'>"_'"</span>
<a name="line-158"></a>
<a name="line-159"></a>    <span class='hs-varid'>lexFracExp</span> <span class='hs-varid'>acc</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>uncons</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>of</span>
<a name="line-160"></a>                           <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-chr'>'.'</span><span class='hs-layout'>,</span><span class='hs-varid'>s'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span>
<a name="line-161"></a>                               <span class='hs-keyword'>case</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>uncons</span> <span class='hs-varid'>s'</span> <span class='hs-keyword'>of</span>
<a name="line-162"></a>                                   <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>d</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'>isDigit</span> <span class='hs-varid'>d</span> <span class='hs-keyglyph'>-&gt;</span>
<a name="line-163"></a>                                        <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>ds</span><span class='hs-layout'>,</span><span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>span</span> <span class='hs-varid'>isDigit</span> <span class='hs-varid'>s''</span> <span class='hs-keyword'>in</span>
<a name="line-164"></a>                                        <span class='hs-varid'>lexExp</span> <span class='hs-layout'>(</span><span class='hs-varid'>acc</span><span class='hs-varop'>++</span><span class='hs-chr'>'.'</span><span class='hs-conop'>:</span><span class='hs-varid'>d</span><span class='hs-conop'>:</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>ds</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span>
<a name="line-165"></a>                                   <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>lexExp</span> <span class='hs-varid'>acc</span> <span class='hs-varid'>s'</span>
<a name="line-166"></a>                           <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>lexExp</span> <span class='hs-varid'>acc</span> <span class='hs-varid'>s</span>
<a name="line-167"></a>
<a name="line-168"></a>    <span class='hs-varid'>lexExp</span> <span class='hs-varid'>acc</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>uncons</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>of</span>
<a name="line-169"></a>        <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>e</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'>e</span> <span class='hs-varop'>`elem`</span> <span class='hs-str'>"eE"</span> <span class='hs-keyglyph'>-&gt;</span>
<a name="line-170"></a>                    <span class='hs-keyword'>case</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>uncons</span> <span class='hs-varid'>s'</span> <span class='hs-keyword'>of</span>
<a name="line-171"></a>                        <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>sign</span><span class='hs-layout'>,</span><span class='hs-varid'>dt</span><span class='hs-layout'>)</span>
<a name="line-172"></a>                            <span class='hs-keyglyph'>|</span> <span class='hs-varid'>sign</span> <span class='hs-varop'>`elem`</span> <span class='hs-str'>"+-"</span> <span class='hs-keyglyph'>-&gt;</span>
<a name="line-173"></a>                                  <span class='hs-keyword'>case</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>uncons</span> <span class='hs-varid'>dt</span> <span class='hs-keyword'>of</span>
<a name="line-174"></a>                                      <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>d</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'>isDigit</span> <span class='hs-varid'>d</span> <span class='hs-keyglyph'>-&gt;</span>
<a name="line-175"></a>                                          <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>ds</span><span class='hs-layout'>,</span><span class='hs-varid'>u</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>span</span> <span class='hs-varid'>isDigit</span> <span class='hs-varid'>t</span> <span class='hs-keyword'>in</span>
<a name="line-176"></a>                                          <span class='hs-conid'>Success</span> <span class='hs-varid'>u</span> <span class='hs-layout'>(</span><span class='hs-varid'>acc</span><span class='hs-varop'>++</span><span class='hs-chr'>'e'</span><span class='hs-conop'>:</span> <span class='hs-varid'>sign</span><span class='hs-conop'>:</span> <span class='hs-varid'>d</span><span class='hs-conop'>:</span>
<a name="line-177"></a>                                                     <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>ds</span><span class='hs-layout'>)</span>
<a name="line-178"></a>                            <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isDigit</span> <span class='hs-varid'>sign</span> <span class='hs-keyglyph'>-&gt;</span>
<a name="line-179"></a>                                  <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>ds</span><span class='hs-layout'>,</span><span class='hs-varid'>u</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>span</span> <span class='hs-varid'>isDigit</span> <span class='hs-varid'>dt</span> <span class='hs-keyword'>in</span>
<a name="line-180"></a>                                  <span class='hs-conid'>Success</span> <span class='hs-varid'>u</span> <span class='hs-layout'>(</span><span class='hs-varid'>acc</span><span class='hs-varop'>++</span><span class='hs-chr'>'e'</span><span class='hs-conop'>:</span> <span class='hs-varid'>sign</span><span class='hs-conop'>:</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>ds</span><span class='hs-layout'>)</span>
<a name="line-181"></a>                        <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Failure</span> <span class='hs-varid'>s'</span> <span class='hs-layout'>(</span><span class='hs-str'>"missing +/-/digit "</span>
<a name="line-182"></a>                                        <span class='hs-varop'>++</span><span class='hs-str'>"after e in float literal: "</span>
<a name="line-183"></a>                                        <span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>acc</span><span class='hs-varop'>++</span><span class='hs-chr'>'e'</span><span class='hs-conop'>:</span><span class='hs-str'>"..."</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-184"></a>        <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Success</span> <span class='hs-varid'>s</span> <span class='hs-varid'>acc</span>
<a name="line-185"></a>
<a name="line-186"></a>    <span class='hs-varid'>litString</span> <span class='hs-varid'>acc</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>uncons</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>of</span>
<a name="line-187"></a>        <span class='hs-conid'>Nothing</span>       <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Failure</span> <span class='hs-layout'>(</span><span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span><span class='hs-layout'>)</span>
<a name="line-188"></a>                                 <span class='hs-layout'>(</span><span class='hs-str'>"end of input in string literal "</span><span class='hs-varop'>++</span><span class='hs-varid'>acc</span><span class='hs-layout'>)</span>
<a name="line-189"></a>        <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-chr'>'\"'</span><span class='hs-layout'>,</span><span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Success</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-varid'>acc</span><span class='hs-varop'>++</span><span class='hs-str'>"\""</span><span class='hs-layout'>)</span>
<a name="line-190"></a>        <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-chr'>'\\'</span><span class='hs-layout'>,</span><span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyword'>case</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>uncons</span> <span class='hs-varid'>r</span> <span class='hs-keyword'>of</span>   <span class='hs-comment'>-- "for vim</span>
<a name="line-191"></a>                             <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-chr'>'\"'</span><span class='hs-layout'>,</span><span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>litString</span> <span class='hs-layout'>(</span><span class='hs-varid'>acc</span><span class='hs-varop'>++</span><span class='hs-str'>"\\\""</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span>
<a name="line-192"></a>                             <span class='hs-keyword'>_</span>             <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>litString</span> <span class='hs-layout'>(</span><span class='hs-varid'>acc</span><span class='hs-varop'>++</span><span class='hs-str'>"\\"</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span>  <span class='hs-comment'>-- "vim</span>
<a name="line-193"></a>        <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-varid'>r</span><span class='hs-layout'>)</span>    <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>error</span> <span class='hs-str'>"Text.Parse.word(litString) - can't happen"</span>
<a name="line-194"></a>
<a name="line-195"></a>
<a name="line-196"></a><a name="isWord"></a><span class='hs-comment'>-- | Ensure that the next input word is the given string.  (Note the input</span>
<a name="line-197"></a><span class='hs-comment'>--   is lexed as haskell, so wordbreaks at spaces, symbols, etc.)</span>
<a name="line-198"></a><span class='hs-definition'>isWord</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>TextParser</span> <span class='hs-conid'>String</span>
<a name="line-199"></a><span class='hs-definition'>isWord</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-layout'>{</span> <span class='hs-varid'>w'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>word</span>
<a name="line-200"></a>              <span class='hs-layout'>;</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>w'</span><span class='hs-varop'>==</span><span class='hs-varid'>w</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-varid'>w</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>fail</span> <span class='hs-layout'>(</span><span class='hs-str'>"expected "</span><span class='hs-varop'>++</span><span class='hs-varid'>w</span><span class='hs-varop'>++</span><span class='hs-str'>" got "</span><span class='hs-varop'>++</span><span class='hs-varid'>w'</span><span class='hs-layout'>)</span>
<a name="line-201"></a>              <span class='hs-layout'>}</span>
<a name="line-202"></a>
<a name="line-203"></a><a name="optionalParens"></a><span class='hs-comment'>-- | Allow optional nested string parens around an item.</span>
<a name="line-204"></a><span class='hs-definition'>optionalParens</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TextParser</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>TextParser</span> <span class='hs-varid'>a</span>
<a name="line-205"></a><span class='hs-definition'>optionalParens</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>parens</span> <span class='hs-conid'>False</span> <span class='hs-varid'>p</span>
<a name="line-206"></a>
<a name="line-207"></a><a name="parens"></a><span class='hs-comment'>-- | Allow nested parens around an item (one set required when Bool is True).</span>
<a name="line-208"></a><span class='hs-definition'>parens</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>TextParser</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>TextParser</span> <span class='hs-varid'>a</span>
<a name="line-209"></a><span class='hs-definition'>parens</span> <span class='hs-conid'>True</span>  <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>bracket</span> <span class='hs-layout'>(</span><span class='hs-varid'>isWord</span> <span class='hs-str'>"("</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>isWord</span> <span class='hs-str'>")"</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>parens</span> <span class='hs-conid'>False</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-210"></a><span class='hs-definition'>parens</span> <span class='hs-conid'>False</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>parens</span> <span class='hs-conid'>True</span> <span class='hs-varid'>p</span> <span class='hs-varop'>`onFail`</span> <span class='hs-varid'>p</span>
<a name="line-211"></a>
<a name="line-212"></a><a name="field"></a><span class='hs-comment'>-- | Deal with named field syntax.  The string argument is the field name,</span>
<a name="line-213"></a><span class='hs-comment'>--   and the parser returns the value of the field.</span>
<a name="line-214"></a><span class='hs-definition'>field</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parse</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=&gt;</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>TextParser</span> <span class='hs-varid'>a</span>
<a name="line-215"></a><span class='hs-definition'>field</span> <span class='hs-varid'>name</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-layout'>{</span> <span class='hs-varid'>isWord</span> <span class='hs-varid'>name</span><span class='hs-layout'>;</span> <span class='hs-varid'>commit</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span> <span class='hs-layout'>{</span> <span class='hs-varid'>isWord</span> <span class='hs-str'>"="</span><span class='hs-layout'>;</span> <span class='hs-varid'>parse</span> <span class='hs-layout'>}</span> <span class='hs-layout'>}</span>
<a name="line-216"></a>
<a name="line-217"></a><a name="constructors"></a><span class='hs-comment'>-- | Parse one of a bunch of alternative constructors.  In the list argument,</span>
<a name="line-218"></a><span class='hs-comment'>--   the first element of the pair is the constructor name, and</span>
<a name="line-219"></a><span class='hs-comment'>--   the second is the parser for the rest of the value.  The first matching</span>
<a name="line-220"></a><span class='hs-comment'>--   parse is returned.</span>
<a name="line-221"></a><span class='hs-definition'>constructors</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span><span class='hs-conid'>TextParser</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>TextParser</span> <span class='hs-varid'>a</span>
<a name="line-222"></a><span class='hs-definition'>constructors</span> <span class='hs-varid'>cs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>oneOf'</span> <span class='hs-layout'>(</span><span class='hs-varid'>map</span> <span class='hs-varid'>cons</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span>
<a name="line-223"></a>    <span class='hs-keyword'>where</span> <span class='hs-varid'>cons</span> <span class='hs-layout'>(</span><span class='hs-varid'>name</span><span class='hs-layout'>,</span><span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-224"></a>               <span class='hs-layout'>(</span> <span class='hs-varid'>name</span>
<a name="line-225"></a>               <span class='hs-layout'>,</span> <span class='hs-keyword'>do</span> <span class='hs-layout'>{</span> <span class='hs-varid'>isWord</span> <span class='hs-varid'>name</span>
<a name="line-226"></a>                    <span class='hs-layout'>;</span> <span class='hs-varid'>p</span> <span class='hs-varop'>`adjustErrBad`</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-str'>"got constructor, but within "</span>
<a name="line-227"></a>                                        <span class='hs-varop'>++</span><span class='hs-varid'>name</span><span class='hs-varop'>++</span><span class='hs-str'>",\n"</span><span class='hs-layout'>)</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span>
<a name="line-228"></a>                    <span class='hs-layout'>}</span>
<a name="line-229"></a>               <span class='hs-layout'>)</span>
<a name="line-230"></a>
<a name="line-231"></a><a name="enumeration"></a><span class='hs-comment'>-- | Parse one of the given nullary constructors (an enumeration).</span>
<a name="line-232"></a><span class='hs-comment'>--   The string argument is the name of the type, and the list argument</span>
<a name="line-233"></a><span class='hs-comment'>--   should contain all of the possible enumeration values.</span>
<a name="line-234"></a><span class='hs-definition'>enumeration</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=&gt;</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>TextParser</span> <span class='hs-varid'>a</span>
<a name="line-235"></a><span class='hs-definition'>enumeration</span> <span class='hs-varid'>typ</span> <span class='hs-varid'>cs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>oneOf</span> <span class='hs-layout'>(</span><span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>c</span><span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyword'>do</span> <span class='hs-layout'>{</span> <span class='hs-varid'>isWord</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-varid'>c</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span>
<a name="line-236"></a>                         <span class='hs-varop'>`adjustErr`</span>
<a name="line-237"></a>                     <span class='hs-layout'>(</span><span class='hs-varop'>++</span><span class='hs-layout'>(</span><span class='hs-str'>"\n  expected "</span><span class='hs-varop'>++</span><span class='hs-varid'>typ</span><span class='hs-varop'>++</span><span class='hs-str'>" value ("</span><span class='hs-varop'>++</span><span class='hs-varid'>e</span><span class='hs-varop'>++</span><span class='hs-str'>")"</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-238"></a>    <span class='hs-keyword'>where</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concat</span> <span class='hs-layout'>(</span><span class='hs-varid'>intersperse</span> <span class='hs-str'>", "</span> <span class='hs-layout'>(</span><span class='hs-varid'>map</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>init</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-239"></a>              <span class='hs-varop'>++</span> <span class='hs-str'>", or "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>last</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span>
<a name="line-240"></a>
<a name="line-241"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-242"></a><span class='hs-comment'>-- Instances for all the Standard Prelude types.</span>
<a name="line-243"></a>
<a name="line-244"></a><span class='hs-comment'>-- Numeric types</span>
<a name="line-245"></a>
<a name="line-246"></a><a name="parseSigned"></a><span class='hs-comment'>-- | For any numeric parser, permit a negation sign in front of it.</span>
<a name="line-247"></a><span class='hs-definition'>parseSigned</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Real</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=&gt;</span> <span class='hs-conid'>TextParser</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>TextParser</span> <span class='hs-varid'>a</span>
<a name="line-248"></a><span class='hs-definition'>parseSigned</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-chr'>'-'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>commit</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>negate</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-249"></a>                <span class='hs-varop'>`onFail`</span>
<a name="line-250"></a>                <span class='hs-keyword'>do</span> <span class='hs-varid'>p</span>
<a name="line-251"></a>
<a name="line-252"></a><a name="parseInt"></a><span class='hs-comment'>-- | Parse any (unsigned) Integral numeric literal.</span>
<a name="line-253"></a><span class='hs-comment'>--   Needs a base, radix, isDigit predicate,</span>
<a name="line-254"></a><span class='hs-comment'>--   and digitToInt converter, appropriate to the result type.</span>
<a name="line-255"></a><span class='hs-definition'>parseInt</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Integral</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=&gt;</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span>
<a name="line-256"></a>                            <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Bool</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Int</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span>
<a name="line-257"></a>                            <span class='hs-conid'>TextParser</span> <span class='hs-varid'>a</span>
<a name="line-258"></a><span class='hs-definition'>parseInt</span> <span class='hs-varid'>base</span> <span class='hs-varid'>radix</span> <span class='hs-varid'>isDigit</span> <span class='hs-varid'>digitToInt</span> <span class='hs-keyglyph'>=</span>
<a name="line-259"></a>                 <span class='hs-keyword'>do</span> <span class='hs-varid'>cs</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>many1</span> <span class='hs-layout'>(</span><span class='hs-varid'>satisfy</span> <span class='hs-varid'>isDigit</span><span class='hs-layout'>)</span>
<a name="line-260"></a>                    <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldl1</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>n</span> <span class='hs-varid'>d</span><span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>n</span><span class='hs-varop'>*</span><span class='hs-varid'>radix</span><span class='hs-varop'>+</span><span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-261"></a>                                   <span class='hs-layout'>(</span><span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span><span class='hs-varop'>.</span><span class='hs-varid'>digitToInt</span><span class='hs-layout'>)</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-262"></a>                 <span class='hs-varop'>`adjustErr`</span> <span class='hs-layout'>(</span><span class='hs-varop'>++</span><span class='hs-layout'>(</span><span class='hs-str'>"\nexpected one or more "</span><span class='hs-varop'>++</span><span class='hs-varid'>base</span><span class='hs-varop'>++</span><span class='hs-str'>" digits"</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-263"></a>
<a name="line-264"></a><a name="parseDec"></a><span class='hs-comment'>-- | Parse a decimal, octal, or hexadecimal (unsigned) Integral numeric literal.</span>
<a name="line-265"></a><span class='hs-definition'>parseDec</span><span class='hs-layout'>,</span> <span class='hs-varid'>parseOct</span><span class='hs-layout'>,</span> <span class='hs-varid'>parseHex</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Integral</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=&gt;</span> <span class='hs-conid'>TextParser</span> <span class='hs-varid'>a</span>
<a name="line-266"></a><span class='hs-definition'>parseDec</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>parseInt</span> <span class='hs-str'>"decimal"</span> <span class='hs-num'>10</span> <span class='hs-conid'>Char</span><span class='hs-varop'>.</span><span class='hs-varid'>isDigit</span>    <span class='hs-conid'>Char</span><span class='hs-varop'>.</span><span class='hs-varid'>digitToInt</span>
<a name="line-267"></a><a name="parseOct"></a><span class='hs-definition'>parseOct</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>parseInt</span> <span class='hs-str'>"octal"</span>    <span class='hs-num'>8</span> <span class='hs-conid'>Char</span><span class='hs-varop'>.</span><span class='hs-varid'>isOctDigit</span> <span class='hs-conid'>Char</span><span class='hs-varop'>.</span><span class='hs-varid'>digitToInt</span>
<a name="line-268"></a><a name="parseHex"></a><span class='hs-definition'>parseHex</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>parseInt</span> <span class='hs-str'>"hex"</span>     <span class='hs-num'>16</span> <span class='hs-conid'>Char</span><span class='hs-varop'>.</span><span class='hs-varid'>isHexDigit</span> <span class='hs-conid'>Char</span><span class='hs-varop'>.</span><span class='hs-varid'>digitToInt</span>
<a name="line-269"></a>
<a name="line-270"></a><a name="parseUnsignedInteger"></a><span class='hs-comment'>-- | parseUnsignedInteger uses the underlying ByteString readInteger, so</span>
<a name="line-271"></a><span class='hs-comment'>--   will be a lot faster than the generic character-by-character parseInt.</span>
<a name="line-272"></a><span class='hs-definition'>parseUnsignedInteger</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TextParser</span> <span class='hs-conid'>Integer</span>
<a name="line-273"></a><span class='hs-definition'>parseUnsignedInteger</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>P</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>bs</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyword'>case</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>uncons</span> <span class='hs-varid'>bs</span> <span class='hs-keyword'>of</span>
<a name="line-274"></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-keyword'>_</span><span class='hs-layout'>)</span>
<a name="line-275"></a>                                  <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Char</span><span class='hs-varop'>.</span><span class='hs-varid'>isDigit</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>-&gt;</span>
<a name="line-276"></a>                                     <span class='hs-keyword'>case</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>readInteger</span> <span class='hs-varid'>bs</span> <span class='hs-keyword'>of</span>
<a name="line-277"></a>                                     <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-layout'>,</span> <span class='hs-varid'>bs'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Success</span> <span class='hs-varid'>bs'</span> <span class='hs-varid'>i</span>
<a name="line-278"></a>                                     <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>error</span> <span class='hs-str'>"XXX Can't happen"</span>
<a name="line-279"></a>                                 <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Failure</span> <span class='hs-varid'>bs</span> <span class='hs-str'>"parsing Integer: not a digit"</span><span class='hs-layout'>)</span>
<a name="line-280"></a>               <span class='hs-varop'>`adjustErr`</span> <span class='hs-layout'>(</span><span class='hs-varop'>++</span><span class='hs-layout'>(</span><span class='hs-str'>"\nexpected one or more decimal digits"</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-281"></a>
<a name="line-282"></a><a name="parseFloat"></a><span class='hs-comment'>-- | Parse any (unsigned) Floating numeric literal, e.g. Float or Double.</span>
<a name="line-283"></a><span class='hs-definition'>parseFloat</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>RealFrac</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=&gt;</span> <span class='hs-conid'>TextParser</span> <span class='hs-varid'>a</span>
<a name="line-284"></a><span class='hs-definition'>parseFloat</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>ds</span>   <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>many1Satisfy</span> <span class='hs-varid'>isDigit</span>
<a name="line-285"></a>                <span class='hs-varid'>frac</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-layout'>(</span><span class='hs-keyword'>do</span> <span class='hs-chr'>'.'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span>
<a name="line-286"></a>                            <span class='hs-varid'>manySatisfy</span> <span class='hs-varid'>isDigit</span>
<a name="line-287"></a>                              <span class='hs-varop'>`adjustErrBad`</span> <span class='hs-layout'>(</span><span class='hs-varop'>++</span><span class='hs-str'>"expected digit after ."</span><span class='hs-layout'>)</span>
<a name="line-288"></a>                         <span class='hs-varop'>`onFail`</span> <span class='hs-varid'>return</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span> <span class='hs-layout'>)</span>
<a name="line-289"></a>                <span class='hs-varid'>exp</span>  <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>exponent</span> <span class='hs-varop'>`onFail`</span> <span class='hs-varid'>return</span> <span class='hs-num'>0</span>
<a name="line-290"></a>                <span class='hs-layout'>(</span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fromRational</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-varop'>*</span> <span class='hs-layout'>(</span><span class='hs-num'>10</span><span class='hs-varop'>^^</span><span class='hs-layout'>(</span><span class='hs-varid'>exp</span> <span class='hs-comment'>-</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span> <span class='hs-varid'>frac</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-291"></a>                  <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-varop'>%</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span>  <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span> <span class='hs-layout'>(</span><span class='hs-conid'>Right</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>-&gt;</span><span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fst</span>
<a name="line-292"></a>                  <span class='hs-varop'>.</span> <span class='hs-varid'>runParser</span> <span class='hs-varid'>parseDec</span> <span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>ds</span> <span class='hs-varop'>`</span><span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>append</span><span class='hs-varop'>`</span> <span class='hs-varid'>frac</span><span class='hs-layout'>)</span>
<a name="line-293"></a>             <span class='hs-varop'>`onFail`</span>
<a name="line-294"></a>             <span class='hs-keyword'>do</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>manySatisfy</span> <span class='hs-varid'>isAlpha</span>
<a name="line-295"></a>                <span class='hs-keyword'>case</span> <span class='hs-varid'>map</span> <span class='hs-varid'>toLower</span> <span class='hs-layout'>(</span><span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-296"></a>                  <span class='hs-str'>"nan"</span>      <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-num'>0</span><span class='hs-varop'>/</span><span class='hs-num'>0</span><span class='hs-layout'>)</span>
<a name="line-297"></a>                  <span class='hs-str'>"infinity"</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-num'>1</span><span class='hs-varop'>/</span><span class='hs-num'>0</span><span class='hs-layout'>)</span>
<a name="line-298"></a>                  <span class='hs-keyword'>_</span>          <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>fail</span> <span class='hs-str'>"expected a floating point number"</span>
<a name="line-299"></a>  <span class='hs-keyword'>where</span> <span class='hs-varid'>exponent</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-chr'>'e'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>toLower</span> <span class='hs-varid'>next</span>
<a name="line-300"></a>                      <span class='hs-varid'>commit</span> <span class='hs-layout'>(</span><span class='hs-keyword'>do</span> <span class='hs-chr'>'+'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>parseDec</span>
<a name="line-301"></a>                              <span class='hs-varop'>`onFail`</span>
<a name="line-302"></a>                              <span class='hs-varid'>parseSigned</span> <span class='hs-varid'>parseDec</span> <span class='hs-layout'>)</span>
<a name="line-303"></a>
<a name="line-304"></a><a name="parseLitChar"></a><span class='hs-comment'>-- | Parse a Haskell character literal.</span>
<a name="line-305"></a><span class='hs-definition'>parseLitChar</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TextParser</span> <span class='hs-conid'>Char</span>
<a name="line-306"></a><span class='hs-definition'>parseLitChar</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-chr'>'\''</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span> <span class='hs-varop'>`adjustErr`</span> <span class='hs-layout'>(</span><span class='hs-varop'>++</span><span class='hs-str'>"expected a literal char"</span><span class='hs-layout'>)</span>
<a name="line-307"></a>                  <span class='hs-varid'>c</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span>
<a name="line-308"></a>                  <span class='hs-varid'>char</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>c</span> <span class='hs-keyword'>of</span>
<a name="line-309"></a>                            <span class='hs-chr'>'\\'</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>next</span> <span class='hs-varop'>&gt;&gt;=</span> <span class='hs-varid'>escape</span>
<a name="line-310"></a>                            <span class='hs-chr'>'\''</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>fail</span> <span class='hs-str'>"expected a literal char, got ''"</span>
<a name="line-311"></a>                            <span class='hs-keyword'>_</span>    <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>return</span> <span class='hs-varid'>c</span>
<a name="line-312"></a>                  <span class='hs-chr'>'\''</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span> <span class='hs-varop'>`adjustErrBad`</span> <span class='hs-layout'>(</span><span class='hs-varop'>++</span><span class='hs-str'>"literal char has no final '"</span><span class='hs-layout'>)</span>
<a name="line-313"></a>                  <span class='hs-varid'>return</span> <span class='hs-varid'>char</span>
<a name="line-314"></a>  <span class='hs-keyword'>where</span>
<a name="line-315"></a>    <span class='hs-varid'>escape</span> <span class='hs-chr'>'a'</span>  <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\a'</span>
<a name="line-316"></a>    <span class='hs-varid'>escape</span> <span class='hs-chr'>'b'</span>  <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\b'</span>
<a name="line-317"></a>    <span class='hs-varid'>escape</span> <span class='hs-chr'>'f'</span>  <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\f'</span>
<a name="line-318"></a>    <span class='hs-varid'>escape</span> <span class='hs-chr'>'n'</span>  <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\n'</span>
<a name="line-319"></a>    <span class='hs-varid'>escape</span> <span class='hs-chr'>'r'</span>  <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\r'</span>
<a name="line-320"></a>    <span class='hs-varid'>escape</span> <span class='hs-chr'>'t'</span>  <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\t'</span>
<a name="line-321"></a>    <span class='hs-varid'>escape</span> <span class='hs-chr'>'v'</span>  <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\v'</span>
<a name="line-322"></a>    <span class='hs-varid'>escape</span> <span class='hs-chr'>'\\'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\\'</span>
<a name="line-323"></a>    <span class='hs-varid'>escape</span> <span class='hs-chr'>'"'</span>  <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'"'</span>
<a name="line-324"></a>    <span class='hs-varid'>escape</span> <span class='hs-chr'>'\''</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\''</span>
<a name="line-325"></a>    <span class='hs-varid'>escape</span> <span class='hs-chr'>'^'</span>  <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>ctrl</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span>
<a name="line-326"></a>                     <span class='hs-keyword'>if</span> <span class='hs-varid'>ctrl</span> <span class='hs-varop'>&gt;=</span> <span class='hs-chr'>'@'</span> <span class='hs-varop'>&amp;&amp;</span> <span class='hs-varid'>ctrl</span> <span class='hs-varop'>&lt;=</span> <span class='hs-chr'>'_'</span>
<a name="line-327"></a>                       <span class='hs-keyword'>then</span> <span class='hs-varid'>return</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-varid'>ctrl</span> <span class='hs-comment'>-</span> <span class='hs-varid'>ord</span> <span class='hs-chr'>'@'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-328"></a>                       <span class='hs-keyword'>else</span> <span class='hs-varid'>fail</span> <span class='hs-layout'>(</span><span class='hs-str'>"literal char ctrl-escape malformed: \\^"</span>
<a name="line-329"></a>                                   <span class='hs-varop'>++</span><span class='hs-keyglyph'>[</span><span class='hs-varid'>ctrl</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-330"></a>    <span class='hs-varid'>escape</span> <span class='hs-varid'>d</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isDigit</span> <span class='hs-varid'>d</span>
<a name="line-331"></a>                <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>chr</span> <span class='hs-varop'>$</span>  <span class='hs-layout'>(</span><span class='hs-varid'>reparse</span> <span class='hs-layout'>(</span><span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>d</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varop'>&gt;&gt;</span> <span class='hs-varid'>parseDec</span><span class='hs-layout'>)</span>
<a name="line-332"></a>    <span class='hs-varid'>escape</span> <span class='hs-chr'>'o'</span>  <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>chr</span> <span class='hs-varop'>$</span>  <span class='hs-varid'>parseOct</span>
<a name="line-333"></a>    <span class='hs-varid'>escape</span> <span class='hs-chr'>'x'</span>  <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>chr</span> <span class='hs-varop'>$</span>  <span class='hs-varid'>parseHex</span>
<a name="line-334"></a>    <span class='hs-varid'>escape</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isUpper</span> <span class='hs-varid'>c</span>
<a name="line-335"></a>                <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mnemonic</span> <span class='hs-varid'>c</span>
<a name="line-336"></a>    <span class='hs-varid'>escape</span> <span class='hs-varid'>c</span>    <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fail</span> <span class='hs-layout'>(</span><span class='hs-str'>"unrecognised escape sequence in literal char: \\"</span><span class='hs-varop'>++</span><span class='hs-keyglyph'>[</span><span class='hs-varid'>c</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-337"></a>
<a name="line-338"></a>    <span class='hs-varid'>mnemonic</span> <span class='hs-chr'>'A'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-chr'>'C'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-chr'>'K'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\ACK'</span>
<a name="line-339"></a>                   <span class='hs-varop'>`wrap`</span> <span class='hs-str'>"'\\ACK'"</span>
<a name="line-340"></a>    <span class='hs-varid'>mnemonic</span> <span class='hs-chr'>'B'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-chr'>'E'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-chr'>'L'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\BEL'</span>
<a name="line-341"></a>                   <span class='hs-varop'>`onFail`</span>
<a name="line-342"></a>                   <span class='hs-keyword'>do</span> <span class='hs-chr'>'S'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\BS'</span>
<a name="line-343"></a>                   <span class='hs-varop'>`wrap`</span> <span class='hs-str'>"'\\BEL' or '\\BS'"</span>
<a name="line-344"></a>    <span class='hs-varid'>mnemonic</span> <span class='hs-chr'>'C'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-chr'>'R'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\CR'</span>
<a name="line-345"></a>                   <span class='hs-varop'>`onFail`</span>
<a name="line-346"></a>                   <span class='hs-keyword'>do</span> <span class='hs-chr'>'A'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-chr'>'N'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\CAN'</span>
<a name="line-347"></a>                   <span class='hs-varop'>`wrap`</span> <span class='hs-str'>"'\\CR' or '\\CAN'"</span>
<a name="line-348"></a>    <span class='hs-varid'>mnemonic</span> <span class='hs-chr'>'D'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-chr'>'E'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-chr'>'L'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\DEL'</span>
<a name="line-349"></a>                   <span class='hs-varop'>`onFail`</span>
<a name="line-350"></a>                   <span class='hs-keyword'>do</span> <span class='hs-chr'>'L'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-chr'>'E'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\DLE'</span>
<a name="line-351"></a>                   <span class='hs-varop'>`onFail`</span>
<a name="line-352"></a>                   <span class='hs-keyword'>do</span> <span class='hs-chr'>'C'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-layout'>(</span> <span class='hs-keyword'>do</span> <span class='hs-chr'>'1'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\DC1'</span>
<a name="line-353"></a>                                     <span class='hs-varop'>`onFail`</span>
<a name="line-354"></a>                                     <span class='hs-keyword'>do</span> <span class='hs-chr'>'2'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\DC2'</span>
<a name="line-355"></a>                                     <span class='hs-varop'>`onFail`</span>
<a name="line-356"></a>                                     <span class='hs-keyword'>do</span> <span class='hs-chr'>'3'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\DC3'</span>
<a name="line-357"></a>                                     <span class='hs-varop'>`onFail`</span>
<a name="line-358"></a>                                     <span class='hs-keyword'>do</span> <span class='hs-chr'>'4'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\DC4'</span> <span class='hs-layout'>)</span>
<a name="line-359"></a>                   <span class='hs-varop'>`wrap`</span> <span class='hs-str'>"'\\DEL' or '\\DLE' or '\\DC[1..4]'"</span>
<a name="line-360"></a>    <span class='hs-varid'>mnemonic</span> <span class='hs-chr'>'E'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-chr'>'T'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-chr'>'X'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\ETX'</span>
<a name="line-361"></a>                   <span class='hs-varop'>`onFail`</span>
<a name="line-362"></a>                   <span class='hs-keyword'>do</span> <span class='hs-chr'>'O'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-chr'>'T'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\EOT'</span>
<a name="line-363"></a>                   <span class='hs-varop'>`onFail`</span>
<a name="line-364"></a>                   <span class='hs-keyword'>do</span> <span class='hs-chr'>'N'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-chr'>'Q'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\ENQ'</span>
<a name="line-365"></a>                   <span class='hs-varop'>`onFail`</span>
<a name="line-366"></a>                   <span class='hs-keyword'>do</span> <span class='hs-chr'>'T'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-chr'>'B'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\ETB'</span>
<a name="line-367"></a>                   <span class='hs-varop'>`onFail`</span>
<a name="line-368"></a>                   <span class='hs-keyword'>do</span> <span class='hs-chr'>'M'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\EM'</span>
<a name="line-369"></a>                   <span class='hs-varop'>`onFail`</span>
<a name="line-370"></a>                   <span class='hs-keyword'>do</span> <span class='hs-chr'>'S'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-chr'>'C'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\ESC'</span>
<a name="line-371"></a>                   <span class='hs-varop'>`wrap`</span> <span class='hs-str'>"one of '\\ETX' '\\EOT' '\\ENQ' '\\ETB' '\\EM' or '\\ESC'"</span>
<a name="line-372"></a>    <span class='hs-varid'>mnemonic</span> <span class='hs-chr'>'F'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-chr'>'F'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\FF'</span>
<a name="line-373"></a>                   <span class='hs-varop'>`onFail`</span>
<a name="line-374"></a>                   <span class='hs-keyword'>do</span> <span class='hs-chr'>'S'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\FS'</span>
<a name="line-375"></a>                   <span class='hs-varop'>`wrap`</span> <span class='hs-str'>"'\\FF' or '\\FS'"</span>
<a name="line-376"></a>    <span class='hs-varid'>mnemonic</span> <span class='hs-chr'>'G'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-chr'>'S'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\GS'</span>
<a name="line-377"></a>                   <span class='hs-varop'>`wrap`</span> <span class='hs-str'>"'\\GS'"</span>
<a name="line-378"></a>    <span class='hs-varid'>mnemonic</span> <span class='hs-chr'>'H'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-chr'>'T'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\HT'</span>
<a name="line-379"></a>                   <span class='hs-varop'>`wrap`</span> <span class='hs-str'>"'\\HT'"</span>
<a name="line-380"></a>    <span class='hs-varid'>mnemonic</span> <span class='hs-chr'>'L'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-chr'>'F'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\LF'</span>
<a name="line-381"></a>                   <span class='hs-varop'>`wrap`</span> <span class='hs-str'>"'\\LF'"</span>
<a name="line-382"></a>    <span class='hs-varid'>mnemonic</span> <span class='hs-chr'>'N'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-chr'>'U'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-chr'>'L'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\NUL'</span>
<a name="line-383"></a>                   <span class='hs-varop'>`onFail`</span>
<a name="line-384"></a>                   <span class='hs-keyword'>do</span> <span class='hs-chr'>'A'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-chr'>'K'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\NAK'</span>
<a name="line-385"></a>                   <span class='hs-varop'>`wrap`</span> <span class='hs-str'>"'\\NUL' or '\\NAK'"</span>
<a name="line-386"></a>    <span class='hs-varid'>mnemonic</span> <span class='hs-chr'>'R'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-chr'>'S'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\RS'</span>
<a name="line-387"></a>                   <span class='hs-varop'>`wrap`</span> <span class='hs-str'>"'\\RS'"</span>
<a name="line-388"></a>    <span class='hs-varid'>mnemonic</span> <span class='hs-chr'>'S'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-chr'>'O'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-chr'>'H'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\SOH'</span>
<a name="line-389"></a>                   <span class='hs-varop'>`onFail`</span>
<a name="line-390"></a>                   <span class='hs-keyword'>do</span> <span class='hs-chr'>'O'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\SO'</span>
<a name="line-391"></a>                   <span class='hs-varop'>`onFail`</span>
<a name="line-392"></a>                   <span class='hs-keyword'>do</span> <span class='hs-chr'>'T'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-chr'>'X'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\STX'</span>
<a name="line-393"></a>                   <span class='hs-varop'>`onFail`</span>
<a name="line-394"></a>                   <span class='hs-keyword'>do</span> <span class='hs-chr'>'I'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\SI'</span>
<a name="line-395"></a>                   <span class='hs-varop'>`onFail`</span>
<a name="line-396"></a>                   <span class='hs-keyword'>do</span> <span class='hs-chr'>'Y'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-chr'>'N'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\SYN'</span>
<a name="line-397"></a>                   <span class='hs-varop'>`onFail`</span>
<a name="line-398"></a>                   <span class='hs-keyword'>do</span> <span class='hs-chr'>'U'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-chr'>'B'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\SUB'</span>
<a name="line-399"></a>                   <span class='hs-varop'>`onFail`</span>
<a name="line-400"></a>                   <span class='hs-keyword'>do</span> <span class='hs-chr'>'P'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\SP'</span>
<a name="line-401"></a>                   <span class='hs-varop'>`wrap`</span> <span class='hs-str'>"'\\SOH' '\\SO' '\\STX' '\\SI' '\\SYN' '\\SUB' or '\\SP'"</span>
<a name="line-402"></a>    <span class='hs-varid'>mnemonic</span> <span class='hs-chr'>'U'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-chr'>'S'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\US'</span>
<a name="line-403"></a>                   <span class='hs-varop'>`wrap`</span> <span class='hs-str'>"'\\US'"</span>
<a name="line-404"></a>    <span class='hs-varid'>mnemonic</span> <span class='hs-chr'>'V'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-chr'>'T'</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>next</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-chr'>'\VT'</span>
<a name="line-405"></a>                   <span class='hs-varop'>`wrap`</span> <span class='hs-str'>"'\\VT'"</span>
<a name="line-406"></a>    <span class='hs-varid'>wrap</span> <span class='hs-varid'>p</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>p</span> <span class='hs-varop'>`onFail`</span> <span class='hs-varid'>fail</span> <span class='hs-layout'>(</span><span class='hs-str'>"expected literal char "</span><span class='hs-varop'>++</span><span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-407"></a>
<a name="line-408"></a><span class='hs-comment'>-- Basic types</span>
<a name="line-409"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Parse</span> <span class='hs-conid'>Int</span> <span class='hs-keyword'>where</span>
<a name="line-410"></a>    <span class='hs-varid'>parse</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>fromInteger</span> <span class='hs-varop'>$</span>	<span class='hs-comment'>-- convert from Integer, deals with minInt</span>
<a name="line-411"></a>              <span class='hs-keyword'>do</span> <span class='hs-varid'>manySatisfy</span> <span class='hs-varid'>isSpace</span><span class='hs-layout'>;</span> <span class='hs-varid'>parseSigned</span> <span class='hs-varid'>parseUnsignedInteger</span>
<a name="line-412"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Parse</span> <span class='hs-conid'>Integer</span> <span class='hs-keyword'>where</span>
<a name="line-413"></a>    <span class='hs-varid'>parse</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>manySatisfy</span> <span class='hs-varid'>isSpace</span><span class='hs-layout'>;</span> <span class='hs-varid'>parseSigned</span> <span class='hs-varid'>parseUnsignedInteger</span>
<a name="line-414"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Parse</span> <span class='hs-conid'>Float</span> <span class='hs-keyword'>where</span>
<a name="line-415"></a>    <span class='hs-varid'>parse</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>manySatisfy</span> <span class='hs-varid'>isSpace</span><span class='hs-layout'>;</span> <span class='hs-varid'>parseSigned</span> <span class='hs-varid'>parseFloat</span>
<a name="line-416"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Parse</span> <span class='hs-conid'>Double</span> <span class='hs-keyword'>where</span>
<a name="line-417"></a>    <span class='hs-varid'>parse</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>manySatisfy</span> <span class='hs-varid'>isSpace</span><span class='hs-layout'>;</span> <span class='hs-varid'>parseSigned</span> <span class='hs-varid'>parseFloat</span>
<a name="line-418"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Parse</span> <span class='hs-conid'>Char</span> <span class='hs-keyword'>where</span>
<a name="line-419"></a>    <span class='hs-varid'>parse</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>manySatisfy</span> <span class='hs-varid'>isSpace</span><span class='hs-layout'>;</span> <span class='hs-varid'>parseLitChar</span>
<a name="line-420"></a>	<span class='hs-comment'>-- not totally correct for strings...</span>
<a name="line-421"></a>    <span class='hs-varid'>parseList</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-layout'>{</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>word</span><span class='hs-layout'>;</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>head</span> <span class='hs-varid'>w</span> <span class='hs-varop'>==</span> <span class='hs-chr'>'"'</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>init</span> <span class='hs-layout'>(</span><span class='hs-varid'>tail</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-422"></a>                                <span class='hs-keyword'>else</span> <span class='hs-varid'>fail</span> <span class='hs-str'>"not a string"</span> <span class='hs-layout'>}</span>
<a name="line-423"></a>
<a name="line-424"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Parse</span> <span class='hs-conid'>Bool</span> <span class='hs-keyword'>where</span>
<a name="line-425"></a>    <span class='hs-varid'>parse</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>enumeration</span> <span class='hs-str'>"Bool"</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>False</span><span class='hs-layout'>,</span><span class='hs-conid'>True</span><span class='hs-keyglyph'>]</span>
<a name="line-426"></a>
<a name="line-427"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Parse</span> <span class='hs-conid'>Ordering</span> <span class='hs-keyword'>where</span>
<a name="line-428"></a>    <span class='hs-varid'>parse</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>enumeration</span> <span class='hs-str'>"Ordering"</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>LT</span><span class='hs-layout'>,</span><span class='hs-conid'>EQ</span><span class='hs-layout'>,</span><span class='hs-conid'>GT</span><span class='hs-keyglyph'>]</span>
<a name="line-429"></a>
<a name="line-430"></a><span class='hs-comment'>-- Structural types</span>
<a name="line-431"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Parse</span> <span class='hs-conid'>()</span> <span class='hs-keyword'>where</span>
<a name="line-432"></a>    <span class='hs-varid'>parse</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>P</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span> <span class='hs-varop'>.</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>uncons</span><span class='hs-layout'>)</span>
<a name="line-433"></a>      <span class='hs-keyword'>where</span> <span class='hs-varid'>p</span> <span class='hs-conid'>Nothing</span>         <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Failure</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span> <span class='hs-str'>"no input: expected a ()"</span>
<a name="line-434"></a>            <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-chr'>'('</span><span class='hs-layout'>,</span><span class='hs-varid'>cs</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>uncons</span> <span class='hs-layout'>(</span><span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>dropWhile</span> <span class='hs-varid'>isSpace</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-435"></a>                                <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-chr'>')'</span><span class='hs-layout'>,</span><span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Success</span> <span class='hs-varid'>s</span> <span class='hs-conid'>()</span>
<a name="line-436"></a>                                <span class='hs-keyword'>_</span>            <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Failure</span> <span class='hs-varid'>cs</span> <span class='hs-str'>"Expected ) after ("</span>
<a name="line-437"></a>            <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><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'>cs</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>   <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isSpace</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>uncons</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span>
<a name="line-438"></a>                              <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Failure</span> <span class='hs-layout'>(</span><span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>cons</span> <span class='hs-varid'>c</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span>
<a name="line-439"></a>                                                <span class='hs-layout'>(</span><span class='hs-str'>"Expected a (), got "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-440"></a>
<a name="line-441"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Parse</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Parse</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=&gt;</span> <span class='hs-conid'>Parse</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-442"></a>    <span class='hs-varid'>parse</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span><span class='hs-layout'>{</span> <span class='hs-varid'>isWord</span> <span class='hs-str'>"("</span> <span class='hs-varop'>`adjustErr`</span> <span class='hs-layout'>(</span><span class='hs-str'>"Opening a 2-tuple\n"</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span>
<a name="line-443"></a>              <span class='hs-layout'>;</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>parse</span> <span class='hs-varop'>`adjustErr`</span> <span class='hs-layout'>(</span><span class='hs-str'>"In 1st item of a 2-tuple\n"</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span>
<a name="line-444"></a>              <span class='hs-layout'>;</span> <span class='hs-varid'>isWord</span> <span class='hs-str'>","</span> <span class='hs-varop'>`adjustErr`</span> <span class='hs-layout'>(</span><span class='hs-str'>"Separating a 2-tuple\n"</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span>
<a name="line-445"></a>              <span class='hs-layout'>;</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>parse</span> <span class='hs-varop'>`adjustErr`</span> <span class='hs-layout'>(</span><span class='hs-str'>"In 2nd item of a 2-tuple\n"</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span>
<a name="line-446"></a>              <span class='hs-layout'>;</span> <span class='hs-varid'>isWord</span> <span class='hs-str'>")"</span> <span class='hs-varop'>`adjustErr`</span> <span class='hs-layout'>(</span><span class='hs-str'>"Closing a 2-tuple\n"</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span>
<a name="line-447"></a>              <span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-layout'>}</span>
<a name="line-448"></a>
<a name="line-449"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Parse</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Parse</span> <span class='hs-varid'>b</span><span class='hs-layout'>,</span> <span class='hs-conid'>Parse</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=&gt;</span> <span class='hs-conid'>Parse</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>b</span><span class='hs-layout'>,</span><span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-450"></a>    <span class='hs-varid'>parse</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span><span class='hs-layout'>{</span> <span class='hs-varid'>isWord</span> <span class='hs-str'>"("</span> <span class='hs-varop'>`adjustErr`</span> <span class='hs-layout'>(</span><span class='hs-str'>"Opening a 3-tuple\n"</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span>
<a name="line-451"></a>              <span class='hs-layout'>;</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>parse</span> <span class='hs-varop'>`adjustErr`</span> <span class='hs-layout'>(</span><span class='hs-str'>"In 1st item of a 3-tuple\n"</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span>
<a name="line-452"></a>              <span class='hs-layout'>;</span> <span class='hs-varid'>isWord</span> <span class='hs-str'>","</span> <span class='hs-varop'>`adjustErr`</span> <span class='hs-layout'>(</span><span class='hs-str'>"Separating(1) a 3-tuple\n"</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span>
<a name="line-453"></a>              <span class='hs-layout'>;</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>parse</span> <span class='hs-varop'>`adjustErr`</span> <span class='hs-layout'>(</span><span class='hs-str'>"In 2nd item of a 3-tuple\n"</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span>
<a name="line-454"></a>              <span class='hs-layout'>;</span> <span class='hs-varid'>isWord</span> <span class='hs-str'>","</span> <span class='hs-varop'>`adjustErr`</span> <span class='hs-layout'>(</span><span class='hs-str'>"Separating(2) a 3-tuple\n"</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span>
<a name="line-455"></a>              <span class='hs-layout'>;</span> <span class='hs-varid'>z</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>parse</span> <span class='hs-varop'>`adjustErr`</span> <span class='hs-layout'>(</span><span class='hs-str'>"In 3rd item of a 3-tuple\n"</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span>
<a name="line-456"></a>              <span class='hs-layout'>;</span> <span class='hs-varid'>isWord</span> <span class='hs-str'>")"</span> <span class='hs-varop'>`adjustErr`</span> <span class='hs-layout'>(</span><span class='hs-str'>"Closing a 3-tuple\n"</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span>
<a name="line-457"></a>              <span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-layout'>}</span>
<a name="line-458"></a>
<a name="line-459"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Parse</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=&gt;</span> <span class='hs-conid'>Parse</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-460"></a>    <span class='hs-varid'>parsePrec</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span>
<a name="line-461"></a>            <span class='hs-varid'>optionalParens</span> <span class='hs-layout'>(</span><span class='hs-keyword'>do</span> <span class='hs-layout'>{</span> <span class='hs-varid'>isWord</span> <span class='hs-str'>"Nothing"</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-462"></a>            <span class='hs-varop'>`onFail`</span>
<a name="line-463"></a>            <span class='hs-varid'>parens</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span><span class='hs-varop'>&gt;</span><span class='hs-num'>9</span><span class='hs-layout'>)</span>   <span class='hs-layout'>(</span><span class='hs-keyword'>do</span> <span class='hs-layout'>{</span> <span class='hs-varid'>isWord</span> <span class='hs-str'>"Just"</span>
<a name="line-464"></a>                               <span class='hs-layout'>;</span> <span class='hs-varid'>fmap</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>parsePrec</span> <span class='hs-num'>10</span>
<a name="line-465"></a>                                     <span class='hs-varop'>`adjustErrBad`</span> <span class='hs-layout'>(</span><span class='hs-str'>"but within Just, "</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span> <span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-466"></a>            <span class='hs-varop'>`adjustErr`</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-str'>"expected a Maybe (Just or Nothing)\n"</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span><span class='hs-varop'>.</span><span class='hs-varid'>indent</span> <span class='hs-num'>2</span><span class='hs-layout'>)</span>
<a name="line-467"></a>
<a name="line-468"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Parse</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Parse</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=&gt;</span> <span class='hs-conid'>Parse</span> <span class='hs-layout'>(</span><span class='hs-conid'>Either</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-469"></a>    <span class='hs-varid'>parsePrec</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span>
<a name="line-470"></a>            <span class='hs-varid'>parens</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span><span class='hs-varop'>&gt;</span><span class='hs-num'>9</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-471"></a>            <span class='hs-varid'>constructors</span> <span class='hs-keyglyph'>[</span> <span class='hs-layout'>(</span><span class='hs-str'>"Left"</span><span class='hs-layout'>,</span>  <span class='hs-keyword'>do</span> <span class='hs-layout'>{</span> <span class='hs-varid'>fmap</span> <span class='hs-conid'>Left</span>  <span class='hs-varop'>$</span> <span class='hs-varid'>parsePrec</span> <span class='hs-num'>10</span> <span class='hs-layout'>}</span> <span class='hs-layout'>)</span>
<a name="line-472"></a>                         <span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-str'>"Right"</span><span class='hs-layout'>,</span> <span class='hs-keyword'>do</span> <span class='hs-layout'>{</span> <span class='hs-varid'>fmap</span> <span class='hs-conid'>Right</span> <span class='hs-varop'>$</span> <span class='hs-varid'>parsePrec</span> <span class='hs-num'>10</span> <span class='hs-layout'>}</span> <span class='hs-layout'>)</span>
<a name="line-473"></a>                         <span class='hs-keyglyph'>]</span>
<a name="line-474"></a>
<a name="line-475"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Parse</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=&gt;</span> <span class='hs-conid'>Parse</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyword'>where</span>
<a name="line-476"></a>    <span class='hs-varid'>parse</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>parseList</span>
<a name="line-477"></a>
<a name="line-478"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-479"></a><span class='hs-comment'>-- ByteStrings as a whole entity.</span>
<a name="line-480"></a>
<a name="line-481"></a><a name="allAsByteString"></a><span class='hs-comment'>-- | Simply return the remaining input ByteString.</span>
<a name="line-482"></a><span class='hs-definition'>allAsByteString</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TextParser</span> <span class='hs-conid'>ByteString</span>
<a name="line-483"></a><span class='hs-definition'>allAsByteString</span> <span class='hs-keyglyph'>=</span>  <span class='hs-conid'>P</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>bs</span><span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Success</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span> <span class='hs-varid'>bs</span><span class='hs-layout'>)</span>
<a name="line-484"></a>
<a name="line-485"></a><a name="allAsString"></a><span class='hs-comment'>-- | Simply return the remaining input as a String.</span>
<a name="line-486"></a><span class='hs-definition'>allAsString</span>     <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TextParser</span> <span class='hs-conid'>String</span>
<a name="line-487"></a><span class='hs-definition'>allAsString</span>     <span class='hs-keyglyph'>=</span>  <span class='hs-varid'>fmap</span> <span class='hs-conid'>BS</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>allAsByteString</span>
<a name="line-488"></a>
<a name="line-489"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
</pre></body>
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