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<pre><a name="line-1"></a><span class='hs-comment'>-- | @pipes@ utilities for incrementally running @attoparsec@-based parsers.</span>
<a name="line-2"></a><span class='hs-comment'>--</span>
<a name="line-3"></a><span class='hs-comment'>-- This module assumes familiarity with @pipes-parse@, you can learn about it in</span>
<a name="line-4"></a><span class='hs-comment'>-- "Pipes.Parse.Tutorial".</span>
<a name="line-5"></a>
<a name="line-6"></a><span class='hs-comment'>{-# LANGUAGE BangPatterns #-}</span>
<a name="line-7"></a><span class='hs-comment'>{-# LANGUAGE DeriveDataTypeable #-}</span>
<a name="line-8"></a><span class='hs-comment'>{-# LANGUAGE FlexibleInstances #-}</span>
<a name="line-9"></a><span class='hs-comment'>{-# LANGUAGE RankNTypes #-}</span>
<a name="line-10"></a>
<a name="line-11"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Pipes</span><span class='hs-varop'>.</span><span class='hs-conid'>Attoparsec</span> <span class='hs-layout'>(</span>
<a name="line-12"></a> <span class='hs-comment'>-- * Parsing</span>
<a name="line-13"></a> <span class='hs-varid'>parse</span>
<a name="line-14"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>parsed</span>
<a name="line-15"></a>
<a name="line-16"></a> <span class='hs-comment'>-- ** Including input length</span>
<a name="line-17"></a> <span class='hs-comment'>--</span>
<a name="line-18"></a> <span class='hs-comment'>-- $lengths</span>
<a name="line-19"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>parseL</span>
<a name="line-20"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>parsedL</span>
<a name="line-21"></a>
<a name="line-22"></a> <span class='hs-comment'>-- * Utils</span>
<a name="line-23"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>isEndOfParserInput</span>
<a name="line-24"></a>
<a name="line-25"></a> <span class='hs-comment'>-- * Types</span>
<a name="line-26"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>ParserInput</span>
<a name="line-27"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>ParsingError</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-28"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-29"></a>
<a name="line-30"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span> <span class='hs-layout'>(</span><span class='hs-conid'>Exception</span><span class='hs-layout'>)</span>
<a name="line-31"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>Trans</span><span class='hs-varop'>.</span><span class='hs-conid'>Error</span> <span class='hs-layout'>(</span><span class='hs-conid'>Error</span><span class='hs-layout'>)</span>
<a name="line-32"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>Trans</span><span class='hs-varop'>.</span><span class='hs-conid'>State</span><span class='hs-varop'>.</span><span class='hs-conid'>Strict</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>S</span>
<a name="line-33"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Attoparsec</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-34"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Attoparsec</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span>
<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'>Attoparsec</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span> <span class='hs-layout'>(</span><span class='hs-conid'>IResult</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-36"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Attoparsec</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Attoparsec</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'>ByteString</span> <span class='hs-layout'>(</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>)</span>
<a name="line-38"></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>
<a name="line-39"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Data</span> <span class='hs-layout'>(</span><span class='hs-conid'>Data</span><span class='hs-layout'>,</span> <span class='hs-conid'>Typeable</span><span class='hs-layout'>)</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'>Monoid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Monoid</span> <span class='hs-layout'>(</span><span class='hs-varid'>mempty</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-41"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span> <span class='hs-layout'>(</span><span class='hs-conid'>Text</span><span class='hs-layout'>)</span>
<a name="line-42"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span>
<a name="line-43"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Pipes</span>
<a name="line-44"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Pipes</span><span class='hs-varop'>.</span><span class='hs-conid'>Parse</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Pipes</span> <span class='hs-layout'>(</span><span class='hs-conid'>Parser</span><span class='hs-layout'>)</span>
<a name="line-45"></a>
<a name="line-46"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-47"></a>
<a name="line-48"></a><a name="parse"></a><span class='hs-comment'>-- | Convert an @attoparsec@ 'Attoparsec.Parser' to a @pipes-parse@</span>
<a name="line-49"></a><span class='hs-comment'>-- 'Pipes.Parser'.</span>
<a name="line-50"></a><span class='hs-comment'>--</span>
<a name="line-51"></a><span class='hs-comment'>-- This 'Pipes.Parser' is compatible with the tools from "Pipes.Parse".</span>
<a name="line-52"></a><span class='hs-comment'>--</span>
<a name="line-53"></a><span class='hs-comment'>-- It returns 'Nothing' if the underlying 'Producer' is exhausted, otherwise</span>
<a name="line-54"></a><span class='hs-comment'>-- it attempts to run the given attoparsec 'Attoparsec.Parser' on the underlying</span>
<a name="line-55"></a><span class='hs-comment'>-- 'Producer', possibly failing with 'ParsingError'.</span>
<a name="line-56"></a><span class='hs-definition'>parse</span>
<a name="line-57"></a> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>ParserInput</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-58"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Attoparsec</span><span class='hs-varop'>.</span><span class='hs-conid'>Parser</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-comment'>-- ^ Attoparsec parser</span>
<a name="line-59"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Pipes</span><span class='hs-varop'>.</span><span class='hs-conid'>Parser</span> <span class='hs-varid'>a</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Either</span> <span class='hs-conid'>ParsingError</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ Pipes parser</span>
<a name="line-60"></a><span class='hs-definition'>parse</span> <span class='hs-varid'>parser</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-conid'>StateT</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p0</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-61"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>nextSkipEmpty</span> <span class='hs-varid'>p0</span>
<a name="line-62"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span>
<a name="line-63"></a> <span class='hs-conid'>Left</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>,</span> <span class='hs-varid'>return</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span>
<a name="line-64"></a> <span class='hs-conid'>Right</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>p1</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>step</span> <span class='hs-layout'>(</span><span class='hs-varid'>yield</span> <span class='hs-varid'>a</span> <span class='hs-varop'>>></span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-sel'>_parse</span> <span class='hs-varid'>parser</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>p1</span>
<a name="line-65"></a> <span class='hs-keyword'>where</span>
<a name="line-66"></a> <span class='hs-varid'>step</span> <span class='hs-varid'>diffP</span> <span class='hs-varid'>res</span> <span class='hs-varid'>p0</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>res</span> <span class='hs-keyword'>of</span>
<a name="line-67"></a> <span class='hs-conid'>Fail</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>c</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Left</span> <span class='hs-layout'>(</span><span class='hs-conid'>ParsingError</span> <span class='hs-varid'>c</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>diffP</span> <span class='hs-varid'>p0</span><span class='hs-layout'>)</span>
<a name="line-68"></a> <span class='hs-conid'>Done</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Right</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>yield</span> <span class='hs-varid'>a</span> <span class='hs-varop'>>></span> <span class='hs-varid'>p0</span><span class='hs-layout'>)</span>
<a name="line-69"></a> <span class='hs-conid'>Partial</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-70"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>nextSkipEmpty</span> <span class='hs-varid'>p0</span>
<a name="line-71"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span>
<a name="line-72"></a> <span class='hs-conid'>Left</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>step</span> <span class='hs-varid'>diffP</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-varid'>mempty</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-73"></a> <span class='hs-conid'>Right</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>p1</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>step</span> <span class='hs-layout'>(</span><span class='hs-varid'>diffP</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-varid'>yield</span> <span class='hs-varid'>a</span> <span class='hs-varop'>>></span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>p1</span>
<a name="line-74"></a><span class='hs-comment'>{-# INLINABLE parse #-}</span>
<a name="line-75"></a>
<a name="line-76"></a>
<a name="line-77"></a><a name="parsed"></a><span class='hs-comment'>-- | Convert a producer of 'ParserInput' to a producer of parsed values.</span>
<a name="line-78"></a><span class='hs-comment'>--</span>
<a name="line-79"></a><span class='hs-comment'>-- This producer returns 'Right' when end-of-input is reached sucessfully,</span>
<a name="line-80"></a><span class='hs-comment'>-- otherwise it returns a 'ParsingError' and the leftovers including</span>
<a name="line-81"></a><span class='hs-comment'>-- the malformed input that couldn't be parsed. You can use 'Pipes.Lift.errorP'</span>
<a name="line-82"></a><span class='hs-comment'>-- to promote the 'Either' return value to an 'Control.Monad.Trans.Error.ErrorT'</span>
<a name="line-83"></a><span class='hs-comment'>-- monad transformer.</span>
<a name="line-84"></a><span class='hs-definition'>parsed</span>
<a name="line-85"></a> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>ParserInput</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-86"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Attoparsec</span><span class='hs-varop'>.</span><span class='hs-conid'>Parser</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-comment'>-- ^ Attoparsec parser</span>
<a name="line-87"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Producer</span> <span class='hs-varid'>a</span> <span class='hs-varid'>m</span> <span class='hs-varid'>r</span> <span class='hs-comment'>-- ^ Raw input</span>
<a name="line-88"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Producer</span> <span class='hs-varid'>b</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Either</span> <span class='hs-layout'>(</span><span class='hs-conid'>ParsingError</span><span class='hs-layout'>,</span> <span class='hs-conid'>Producer</span> <span class='hs-varid'>a</span> <span class='hs-varid'>m</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span>
<a name="line-89"></a><span class='hs-definition'>parsed</span> <span class='hs-varid'>parser</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span>
<a name="line-90"></a> <span class='hs-keyword'>where</span>
<a name="line-91"></a> <span class='hs-varid'>go</span> <span class='hs-varid'>p0</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-92"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>lift</span> <span class='hs-layout'>(</span><span class='hs-varid'>nextSkipEmpty</span> <span class='hs-varid'>p0</span><span class='hs-layout'>)</span>
<a name="line-93"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span>
<a name="line-94"></a> <span class='hs-conid'>Left</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Right</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span>
<a name="line-95"></a> <span class='hs-conid'>Right</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>p1</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>step</span> <span class='hs-layout'>(</span><span class='hs-varid'>yield</span> <span class='hs-varid'>a</span> <span class='hs-varop'>>></span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-sel'>_parse</span> <span class='hs-varid'>parser</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>p1</span>
<a name="line-96"></a> <span class='hs-varid'>step</span> <span class='hs-varid'>diffP</span> <span class='hs-varid'>res</span> <span class='hs-varid'>p0</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>res</span> <span class='hs-keyword'>of</span>
<a name="line-97"></a> <span class='hs-conid'>Fail</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>c</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Left</span> <span class='hs-layout'>(</span><span class='hs-conid'>ParsingError</span> <span class='hs-varid'>c</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-varid'>diffP</span> <span class='hs-varid'>p0</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-98"></a> <span class='hs-conid'>Done</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>yield</span> <span class='hs-varid'>b</span> <span class='hs-varop'>>></span> <span class='hs-varid'>go</span> <span class='hs-layout'>(</span><span class='hs-varid'>yield</span> <span class='hs-varid'>a</span> <span class='hs-varop'>>></span> <span class='hs-varid'>p0</span><span class='hs-layout'>)</span>
<a name="line-99"></a> <span class='hs-conid'>Partial</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-100"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>lift</span> <span class='hs-layout'>(</span><span class='hs-varid'>nextSkipEmpty</span> <span class='hs-varid'>p0</span><span class='hs-layout'>)</span>
<a name="line-101"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span>
<a name="line-102"></a> <span class='hs-conid'>Left</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>step</span> <span class='hs-varid'>diffP</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-varid'>mempty</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-103"></a> <span class='hs-conid'>Right</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>p1</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>step</span> <span class='hs-layout'>(</span><span class='hs-varid'>diffP</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-varid'>yield</span> <span class='hs-varid'>a</span> <span class='hs-varop'>>></span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>p1</span>
<a name="line-104"></a><span class='hs-comment'>{-# INLINABLE parsed #-}</span>
<a name="line-105"></a>
<a name="line-106"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-107"></a><span class='hs-comment'>-- $lengths</span>
<a name="line-108"></a><span class='hs-comment'>-- Like the functions above, but these also provide information about</span>
<a name="line-109"></a><span class='hs-comment'>-- the length of input consumed in order to fully parse each value.</span>
<a name="line-110"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-111"></a>
<a name="line-112"></a><a name="parseL"></a><span class='hs-comment'>-- | Like 'parse', but also returns the length of input consumed to parse the</span>
<a name="line-113"></a><span class='hs-comment'>-- value.</span>
<a name="line-114"></a><span class='hs-definition'>parseL</span>
<a name="line-115"></a> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>ParserInput</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-116"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Attoparsec</span><span class='hs-varop'>.</span><span class='hs-conid'>Parser</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-comment'>-- ^ Attoparsec parser</span>
<a name="line-117"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Pipes</span><span class='hs-varop'>.</span><span class='hs-conid'>Parser</span> <span class='hs-varid'>a</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Either</span> <span class='hs-conid'>ParsingError</span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span><span class='hs-layout'>,</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ Pipes parser</span>
<a name="line-118"></a><span class='hs-definition'>parseL</span> <span class='hs-varid'>parser</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-conid'>StateT</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p0</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-119"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>nextSkipEmpty</span> <span class='hs-varid'>p0</span>
<a name="line-120"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span>
<a name="line-121"></a> <span class='hs-conid'>Left</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>,</span> <span class='hs-varid'>return</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span>
<a name="line-122"></a> <span class='hs-conid'>Right</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>p1</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>step</span> <span class='hs-layout'>(</span><span class='hs-varid'>yield</span> <span class='hs-varid'>a</span> <span class='hs-varop'>>></span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-sel'>_parse</span> <span class='hs-varid'>parser</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>p1</span> <span class='hs-layout'>(</span><span class='hs-sel'>_length</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-123"></a> <span class='hs-keyword'>where</span>
<a name="line-124"></a> <span class='hs-varid'>step</span> <span class='hs-varid'>diffP</span> <span class='hs-varid'>res</span> <span class='hs-varid'>p0</span> <span class='hs-varop'>!</span><span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>res</span> <span class='hs-keyword'>of</span>
<a name="line-125"></a> <span class='hs-conid'>Fail</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>c</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Left</span> <span class='hs-layout'>(</span><span class='hs-conid'>ParsingError</span> <span class='hs-varid'>c</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>diffP</span> <span class='hs-varid'>p0</span><span class='hs-layout'>)</span>
<a name="line-126"></a> <span class='hs-conid'>Done</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Right</span> <span class='hs-layout'>(</span><span class='hs-varid'>len</span> <span class='hs-comment'>-</span> <span class='hs-sel'>_length</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-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>yield</span> <span class='hs-varid'>a</span> <span class='hs-varop'>>></span> <span class='hs-varid'>p0</span><span class='hs-layout'>)</span>
<a name="line-127"></a> <span class='hs-conid'>Partial</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-128"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>nextSkipEmpty</span> <span class='hs-varid'>p0</span>
<a name="line-129"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span>
<a name="line-130"></a> <span class='hs-conid'>Left</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>step</span> <span class='hs-varid'>diffP</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-varid'>mempty</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>len</span>
<a name="line-131"></a> <span class='hs-conid'>Right</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>p1</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>step</span> <span class='hs-layout'>(</span><span class='hs-varid'>diffP</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-varid'>yield</span> <span class='hs-varid'>a</span> <span class='hs-varop'>>></span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>p1</span> <span class='hs-layout'>(</span><span class='hs-varid'>len</span> <span class='hs-varop'>+</span> <span class='hs-sel'>_length</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-132"></a><span class='hs-comment'>{-# INLINABLE parseL #-}</span>
<a name="line-133"></a>
<a name="line-134"></a>
<a name="line-135"></a><a name="parsedL"></a><span class='hs-comment'>-- | Like 'parsed', except this tags each parsed value with the length of input</span>
<a name="line-136"></a><span class='hs-comment'>-- consumed to parse the value.</span>
<a name="line-137"></a><span class='hs-definition'>parsedL</span>
<a name="line-138"></a> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>ParserInput</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-139"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Attoparsec</span><span class='hs-varop'>.</span><span class='hs-conid'>Parser</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-comment'>-- ^ Attoparsec parser</span>
<a name="line-140"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Producer</span> <span class='hs-varid'>a</span> <span class='hs-varid'>m</span> <span class='hs-varid'>r</span> <span class='hs-comment'>-- ^ Raw input</span>
<a name="line-141"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Producer</span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span><span class='hs-layout'>,</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Either</span> <span class='hs-layout'>(</span><span class='hs-conid'>ParsingError</span><span class='hs-layout'>,</span> <span class='hs-conid'>Producer</span> <span class='hs-varid'>a</span> <span class='hs-varid'>m</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span>
<a name="line-142"></a><span class='hs-definition'>parsedL</span> <span class='hs-varid'>parser</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span>
<a name="line-143"></a> <span class='hs-keyword'>where</span>
<a name="line-144"></a> <span class='hs-varid'>go</span> <span class='hs-varid'>p0</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-145"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>lift</span> <span class='hs-layout'>(</span><span class='hs-varid'>nextSkipEmpty</span> <span class='hs-varid'>p0</span><span class='hs-layout'>)</span>
<a name="line-146"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span>
<a name="line-147"></a> <span class='hs-conid'>Left</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Right</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span>
<a name="line-148"></a> <span class='hs-conid'>Right</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>p1</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>step</span> <span class='hs-layout'>(</span><span class='hs-varid'>yield</span> <span class='hs-varid'>a</span> <span class='hs-varop'>>></span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-sel'>_parse</span> <span class='hs-varid'>parser</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>p1</span> <span class='hs-layout'>(</span><span class='hs-sel'>_length</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-149"></a> <span class='hs-varid'>step</span> <span class='hs-varid'>diffP</span> <span class='hs-varid'>res</span> <span class='hs-varid'>p0</span> <span class='hs-varop'>!</span><span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>res</span> <span class='hs-keyword'>of</span>
<a name="line-150"></a> <span class='hs-conid'>Fail</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>c</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Left</span> <span class='hs-layout'>(</span><span class='hs-conid'>ParsingError</span> <span class='hs-varid'>c</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-varid'>diffP</span> <span class='hs-varid'>p0</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-151"></a> <span class='hs-conid'>Done</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>yield</span> <span class='hs-layout'>(</span><span class='hs-varid'>len</span> <span class='hs-comment'>-</span> <span class='hs-sel'>_length</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-varop'>>></span> <span class='hs-varid'>go</span> <span class='hs-layout'>(</span><span class='hs-varid'>yield</span> <span class='hs-varid'>a</span> <span class='hs-varop'>>></span> <span class='hs-varid'>p0</span><span class='hs-layout'>)</span>
<a name="line-152"></a> <span class='hs-conid'>Partial</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-153"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>lift</span> <span class='hs-layout'>(</span><span class='hs-varid'>nextSkipEmpty</span> <span class='hs-varid'>p0</span><span class='hs-layout'>)</span>
<a name="line-154"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span>
<a name="line-155"></a> <span class='hs-conid'>Left</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>step</span> <span class='hs-varid'>diffP</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-varid'>mempty</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>len</span>
<a name="line-156"></a> <span class='hs-conid'>Right</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>p1</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>step</span> <span class='hs-layout'>(</span><span class='hs-varid'>diffP</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-varid'>yield</span> <span class='hs-varid'>a</span> <span class='hs-varop'>>></span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>p1</span> <span class='hs-layout'>(</span><span class='hs-varid'>len</span> <span class='hs-varop'>+</span> <span class='hs-sel'>_length</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-157"></a><span class='hs-comment'>{-# INLINABLE parsedL #-}</span>
<a name="line-158"></a>
<a name="line-159"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-160"></a>
<a name="line-161"></a><a name="isEndOfParserInput"></a><span class='hs-comment'>-- | Like 'Pipes.Parse.isEndOfInput', except that it also consumes and discards</span>
<a name="line-162"></a><span class='hs-comment'>-- leading empty chunks.</span>
<a name="line-163"></a><span class='hs-definition'>isEndOfParserInput</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>ParserInput</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Pipes</span><span class='hs-varop'>.</span><span class='hs-conid'>Parser</span> <span class='hs-varid'>a</span> <span class='hs-varid'>m</span> <span class='hs-conid'>Bool</span>
<a name="line-164"></a><span class='hs-definition'>isEndOfParserInput</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-conid'>StateT</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p0</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-165"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>nextSkipEmpty</span> <span class='hs-varid'>p0</span>
<a name="line-166"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span>
<a name="line-167"></a> <span class='hs-conid'>Left</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>True</span><span class='hs-layout'>,</span> <span class='hs-varid'>return</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span>
<a name="line-168"></a> <span class='hs-conid'>Right</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-varid'>p1</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>False</span><span class='hs-layout'>,</span> <span class='hs-varid'>yield</span> <span class='hs-varid'>a</span> <span class='hs-varop'>>></span> <span class='hs-varid'>p1</span><span class='hs-layout'>)</span>
<a name="line-169"></a><span class='hs-comment'>{-# INLINABLE isEndOfParserInput #-}</span>
<a name="line-170"></a>
<a name="line-171"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-172"></a>
<a name="line-173"></a><a name="ParserInput"></a><span class='hs-comment'>-- | A class for valid @attoparsec@ input types</span>
<a name="line-174"></a><a name="ParserInput"></a><span class='hs-keyword'>class</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Monoid</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>ParserInput</span> <span class='hs-varid'>a</span> <span class='hs-keyword'>where</span>
<a name="line-175"></a> <span class='hs-sel'>_parse</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Attoparsec</span><span class='hs-varop'>.</span><span class='hs-conid'>Parser</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IResult</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span>
<a name="line-176"></a> <span class='hs-sel'>_length</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span>
<a name="line-177"></a>
<a name="line-178"></a><a name="instance%20ParserInput%20ByteString"></a><span class='hs-comment'>-- | Strict 'ByteString'.</span>
<a name="line-179"></a><a name="instance%20ParserInput%20ByteString"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>ParserInput</span> <span class='hs-conid'>ByteString</span> <span class='hs-keyword'>where</span>
<a name="line-180"></a> <span class='hs-sel'>_parse</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Attoparsec</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-varop'>.</span><span class='hs-varid'>parse</span>
<a name="line-181"></a> <span class='hs-comment'>{-# INLINE _parse #-}</span>
<a name="line-182"></a> <span class='hs-sel'>_length</span> <span class='hs-keyglyph'>=</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-varid'>length</span>
<a name="line-183"></a> <span class='hs-comment'>{-# INLINE _length #-}</span>
<a name="line-184"></a>
<a name="line-185"></a><a name="instance%20ParserInput%20Text"></a><span class='hs-comment'>-- | Strict 'Text'.</span>
<a name="line-186"></a><a name="instance%20ParserInput%20Text"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>ParserInput</span> <span class='hs-conid'>Text</span> <span class='hs-keyword'>where</span>
<a name="line-187"></a> <span class='hs-sel'>_parse</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Attoparsec</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-varid'>parse</span>
<a name="line-188"></a> <span class='hs-comment'>{-# INLINE _parse #-}</span>
<a name="line-189"></a> <span class='hs-sel'>_length</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-varid'>length</span>
<a name="line-190"></a> <span class='hs-comment'>{-# INLINE _length #-}</span>
<a name="line-191"></a>
<a name="line-192"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-193"></a>
<a name="line-194"></a><a name="ParsingError"></a><span class='hs-comment'>-- | A parsing error report, as provided by Attoparsec's 'Fail'.</span>
<a name="line-195"></a><a name="ParsingError"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>ParsingError</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ParsingError</span>
<a name="line-196"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>peContexts</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- ^ Contexts where the parsing error occurred.</span>
<a name="line-197"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>peMessage</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Parsing error description message.</span>
<a name="line-198"></a> <span class='hs-layout'>}</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span><span class='hs-layout'>,</span> <span class='hs-conid'>Read</span><span class='hs-layout'>,</span> <span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Data</span><span class='hs-layout'>,</span> <span class='hs-conid'>Typeable</span><span class='hs-layout'>)</span>
<a name="line-199"></a>
<a name="line-200"></a><a name="instance%20Exception%20ParsingError"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Exception</span> <span class='hs-conid'>ParsingError</span>
<a name="line-201"></a><a name="instance%20Error%20ParsingError"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Error</span> <span class='hs-conid'>ParsingError</span>
<a name="line-202"></a>
<a name="line-203"></a><a name="instance%20Error%20(ParsingError,%20Producer%20a%20m%20r)"></a><span class='hs-comment'>-- | This instance allows using 'Pipes.Lift.errorP' with 'parsed' and 'parsedL'</span>
<a name="line-204"></a><a name="instance%20Error%20(ParsingError,%20Producer%20a%20m%20r)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Error</span> <span class='hs-layout'>(</span><span class='hs-conid'>ParsingError</span><span class='hs-layout'>,</span> <span class='hs-conid'>Producer</span> <span class='hs-varid'>a</span> <span class='hs-varid'>m</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span>
<a name="line-205"></a>
<a name="line-206"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-207"></a><span class='hs-comment'>-- Internal stuff</span>
<a name="line-208"></a>
<a name="line-209"></a><a name="nextSkipEmpty"></a><span class='hs-comment'>-- | Like 'Pipes.next', except it skips leading 'mempty' chunks.</span>
<a name="line-210"></a><span class='hs-definition'>nextSkipEmpty</span>
<a name="line-211"></a> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>Eq</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Monoid</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-212"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Producer</span> <span class='hs-varid'>a</span> <span class='hs-varid'>m</span> <span class='hs-varid'>r</span>
<a name="line-213"></a> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Either</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Producer</span> <span class='hs-varid'>a</span> <span class='hs-varid'>m</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-214"></a><span class='hs-definition'>nextSkipEmpty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>go</span> <span class='hs-keyword'>where</span>
<a name="line-215"></a> <span class='hs-varid'>go</span> <span class='hs-varid'>p0</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-216"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>next</span> <span class='hs-varid'>p0</span>
<a name="line-217"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span>
<a name="line-218"></a> <span class='hs-conid'>Left</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varid'>x</span>
<a name="line-219"></a> <span class='hs-conid'>Right</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>p1</span><span class='hs-layout'>)</span>
<a name="line-220"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>a</span> <span class='hs-varop'>==</span> <span class='hs-varid'>mempty</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>go</span> <span class='hs-varid'>p1</span>
<a name="line-221"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varid'>x</span>
<a name="line-222"></a><span class='hs-comment'>{-# INLINABLE nextSkipEmpty #-}</span>
<a name="line-223"></a>
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