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<title>src/Yi/Lexer/Alex.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE DeriveFunctor #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# LANGUAGE RecordWildCards #-}</span>
<a name="line-3"></a><span class='hs-comment'>{-# LANGUAGE TemplateHaskell #-}</span>
<a name="line-4"></a><span class='hs-comment'>{-# OPTIONS_HADDOCK show-extensions #-}</span>
<a name="line-5"></a>
<a name="line-6"></a><span class='hs-comment'>-- |</span>
<a name="line-7"></a><span class='hs-comment'>-- Module : Yi.Lexer.Alex</span>
<a name="line-8"></a><span class='hs-comment'>-- License : GPL-2</span>
<a name="line-9"></a><span class='hs-comment'>-- Maintainer : yi-devel@googlegroups.com</span>
<a name="line-10"></a><span class='hs-comment'>-- Stability : experimental</span>
<a name="line-11"></a><span class='hs-comment'>-- Portability : portable</span>
<a name="line-12"></a><span class='hs-comment'>--</span>
<a name="line-13"></a><span class='hs-comment'>-- Utilities to turn a lexer generated by Alex into a 'Scanner' that</span>
<a name="line-14"></a><span class='hs-comment'>-- can be used by Yi. Most lexers will use the types defined here.</span>
<a name="line-15"></a><span class='hs-comment'>-- Some things are exported for use by lexers themselves through the</span>
<a name="line-16"></a><span class='hs-comment'>-- use of @Yi/Lexers/common.hsinc@.</span>
<a name="line-17"></a>
<a name="line-18"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Yi</span><span class='hs-varop'>.</span><span class='hs-conid'>Lexer</span><span class='hs-varop'>.</span><span class='hs-conid'>Alex</span> <span class='hs-layout'>(</span> <span class='hs-keyword'>module</span> <span class='hs-conid'>Yi</span><span class='hs-varop'>.</span><span class='hs-conid'>Lexer</span><span class='hs-varop'>.</span><span class='hs-conid'>Alex</span>
<a name="line-19"></a> <span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varop'>+~</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varop'>~-</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>Size</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>Stroke</span> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-20"></a>
<a name="line-21"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Lens</span> <span class='hs-layout'>(</span><span class='hs-sel'>_1</span><span class='hs-layout'>,</span> <span class='hs-varid'>view</span><span class='hs-layout'>)</span>
<a name="line-22"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Lens</span><span class='hs-varop'>.</span><span class='hs-conid'>TH</span> <span class='hs-layout'>(</span><span class='hs-varid'>makeLenses</span><span class='hs-layout'>)</span>
<a name="line-23"></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'>Bits</span>
<a name="line-24"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Char</span> <span class='hs-layout'>(</span><span class='hs-varid'>ord</span><span class='hs-layout'>)</span>
<a name="line-25"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Function</span> <span class='hs-layout'>(</span><span class='hs-varid'>on</span><span class='hs-layout'>)</span>
<a name="line-26"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Ix</span>
<a name="line-27"></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'>foldl'</span><span class='hs-layout'>)</span>
<a name="line-28"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Ord</span> <span class='hs-layout'>(</span><span class='hs-varid'>comparing</span><span class='hs-layout'>)</span>
<a name="line-29"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Word</span> <span class='hs-layout'>(</span><span class='hs-conid'>Word8</span><span class='hs-layout'>)</span>
<a name="line-30"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Yi</span><span class='hs-varop'>.</span><span class='hs-conid'>Style</span> <span class='hs-layout'>(</span><span class='hs-conid'>StyleName</span><span class='hs-layout'>)</span>
<a name="line-31"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Yi</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-varid'>mkHighlighter</span><span class='hs-layout'>)</span>
<a name="line-32"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Yi</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span>
<a name="line-33"></a>
<a name="line-34"></a><a name="utf8Encode"></a><span class='hs-comment'>-- | Encode a Haskell String to a list of Word8 values, in UTF8 format.</span>
<a name="line-35"></a><span class='hs-definition'>utf8Encode</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Word8</span><span class='hs-keyglyph'>]</span>
<a name="line-36"></a><span class='hs-definition'>utf8Encode</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varop'>.</span> <span class='hs-varid'>go</span> <span class='hs-varop'>.</span> <span class='hs-varid'>ord</span>
<a name="line-37"></a> <span class='hs-keyword'>where</span>
<a name="line-38"></a> <span class='hs-varid'>go</span> <span class='hs-varid'>oc</span>
<a name="line-39"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>oc</span> <span class='hs-varop'><=</span> <span class='hs-num'>0x7f</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>oc</span><span class='hs-keyglyph'>]</span>
<a name="line-40"></a>
<a name="line-41"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>oc</span> <span class='hs-varop'><=</span> <span class='hs-num'>0x7ff</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span> <span class='hs-num'>0xc0</span> <span class='hs-varop'>+</span> <span class='hs-layout'>(</span><span class='hs-varid'>oc</span> <span class='hs-varop'>`</span><span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Bits</span><span class='hs-varop'>.</span><span class='hs-varid'>shiftR</span><span class='hs-varop'>`</span> <span class='hs-num'>6</span><span class='hs-layout'>)</span>
<a name="line-42"></a> <span class='hs-layout'>,</span> <span class='hs-num'>0x80</span> <span class='hs-varop'>+</span> <span class='hs-varid'>oc</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Bits</span><span class='hs-varop'>..&.</span> <span class='hs-num'>0x3f</span>
<a name="line-43"></a> <span class='hs-keyglyph'>]</span>
<a name="line-44"></a>
<a name="line-45"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>oc</span> <span class='hs-varop'><=</span> <span class='hs-num'>0xffff</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span> <span class='hs-num'>0xe0</span> <span class='hs-varop'>+</span> <span class='hs-layout'>(</span><span class='hs-varid'>oc</span> <span class='hs-varop'>`</span><span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Bits</span><span class='hs-varop'>.</span><span class='hs-varid'>shiftR</span><span class='hs-varop'>`</span> <span class='hs-num'>12</span><span class='hs-layout'>)</span>
<a name="line-46"></a> <span class='hs-layout'>,</span> <span class='hs-num'>0x80</span> <span class='hs-varop'>+</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>oc</span> <span class='hs-varop'>`</span><span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Bits</span><span class='hs-varop'>.</span><span class='hs-varid'>shiftR</span><span class='hs-varop'>`</span> <span class='hs-num'>6</span><span class='hs-layout'>)</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Bits</span><span class='hs-varop'>..&.</span> <span class='hs-num'>0x3f</span><span class='hs-layout'>)</span>
<a name="line-47"></a> <span class='hs-layout'>,</span> <span class='hs-num'>0x80</span> <span class='hs-varop'>+</span> <span class='hs-varid'>oc</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Bits</span><span class='hs-varop'>..&.</span> <span class='hs-num'>0x3f</span>
<a name="line-48"></a> <span class='hs-keyglyph'>]</span>
<a name="line-49"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span> <span class='hs-num'>0xf0</span> <span class='hs-varop'>+</span> <span class='hs-layout'>(</span><span class='hs-varid'>oc</span> <span class='hs-varop'>`</span><span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Bits</span><span class='hs-varop'>.</span><span class='hs-varid'>shiftR</span><span class='hs-varop'>`</span> <span class='hs-num'>18</span><span class='hs-layout'>)</span>
<a name="line-50"></a> <span class='hs-layout'>,</span> <span class='hs-num'>0x80</span> <span class='hs-varop'>+</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>oc</span> <span class='hs-varop'>`</span><span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Bits</span><span class='hs-varop'>.</span><span class='hs-varid'>shiftR</span><span class='hs-varop'>`</span> <span class='hs-num'>12</span><span class='hs-layout'>)</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Bits</span><span class='hs-varop'>..&.</span> <span class='hs-num'>0x3f</span><span class='hs-layout'>)</span>
<a name="line-51"></a> <span class='hs-layout'>,</span> <span class='hs-num'>0x80</span> <span class='hs-varop'>+</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>oc</span> <span class='hs-varop'>`</span><span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Bits</span><span class='hs-varop'>.</span><span class='hs-varid'>shiftR</span><span class='hs-varop'>`</span> <span class='hs-num'>6</span><span class='hs-layout'>)</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Bits</span><span class='hs-varop'>..&.</span> <span class='hs-num'>0x3f</span><span class='hs-layout'>)</span>
<a name="line-52"></a> <span class='hs-layout'>,</span> <span class='hs-num'>0x80</span> <span class='hs-varop'>+</span> <span class='hs-varid'>oc</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Bits</span><span class='hs-varop'>..&.</span> <span class='hs-num'>0x3f</span>
<a name="line-53"></a> <span class='hs-keyglyph'>]</span>
<a name="line-54"></a><a name="Byte"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Byte</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Word8</span>
<a name="line-55"></a>
<a name="line-56"></a><a name="IndexedStr"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>IndexedStr</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>Point</span><span class='hs-layout'>,</span> <span class='hs-conid'>Char</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-57"></a><a name="AlexInput"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>AlexInput</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Byte</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-conid'>IndexedStr</span><span class='hs-layout'>)</span>
<a name="line-58"></a><a name="Action"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Action</span> <span class='hs-varid'>hlState</span> <span class='hs-varid'>token</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IndexedStr</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>hlState</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>hlState</span><span class='hs-layout'>,</span> <span class='hs-varid'>token</span><span class='hs-layout'>)</span>
<a name="line-59"></a>
<a name="line-60"></a><a name="AlexState"></a><span class='hs-comment'>-- | Lexer state</span>
<a name="line-61"></a><a name="AlexState"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>AlexState</span> <span class='hs-varid'>lexerState</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>AlexState</span> <span class='hs-layout'>{</span>
<a name="line-62"></a> <span class='hs-varid'>stLexer</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>lexerState</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- (user defined) lexer state</span>
<a name="line-63"></a> <span class='hs-varid'>lookedOffset</span> <span class='hs-keyglyph'>::</span> <span class='hs-varop'>!</span><span class='hs-conid'>Point</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- Last offset looked at</span>
<a name="line-64"></a> <span class='hs-varid'>stPosn</span> <span class='hs-keyglyph'>::</span> <span class='hs-varop'>!</span><span class='hs-conid'>Posn</span>
<a name="line-65"></a> <span class='hs-layout'>}</span> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Show</span>
<a name="line-66"></a>
<a name="line-67"></a><a name="Tok"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Tok</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Tok</span> <span class='hs-layout'>{</span> <span class='hs-varid'>tokT</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>t</span>
<a name="line-68"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>tokLen</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Size</span>
<a name="line-69"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>tokPosn</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Posn</span>
<a name="line-70"></a> <span class='hs-layout'>}</span> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Functor</span>
<a name="line-71"></a>
<a name="line-72"></a><a name="instance%20Eq%20(Tok%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Eq</span> <span class='hs-layout'>(</span><span class='hs-conid'>Tok</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-73"></a> <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-varop'>==</span><span class='hs-layout'>)</span> <span class='hs-varop'>`on`</span> <span class='hs-varid'>tokPosn</span>
<a name="line-74"></a>
<a name="line-75"></a><a name="tokToSpan"></a><span class='hs-definition'>tokToSpan</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Tok</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Span</span> <span class='hs-varid'>t</span>
<a name="line-76"></a><span class='hs-definition'>tokToSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Tok</span> <span class='hs-varid'>t</span> <span class='hs-varid'>len</span> <span class='hs-varid'>posn</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Span</span> <span class='hs-layout'>(</span><span class='hs-varid'>posnOfs</span> <span class='hs-varid'>posn</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-varid'>posnOfs</span> <span class='hs-varid'>posn</span> <span class='hs-varop'>+~</span> <span class='hs-varid'>len</span><span class='hs-layout'>)</span>
<a name="line-77"></a>
<a name="line-78"></a><a name="tokFromT"></a><span class='hs-definition'>tokFromT</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Tok</span> <span class='hs-varid'>t</span>
<a name="line-79"></a><span class='hs-definition'>tokFromT</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Tok</span> <span class='hs-varid'>t</span> <span class='hs-num'>0</span> <span class='hs-varid'>startPosn</span>
<a name="line-80"></a>
<a name="line-81"></a><a name="tokBegin"></a><span class='hs-definition'>tokBegin</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Tok</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Point</span>
<a name="line-82"></a><span class='hs-definition'>tokBegin</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>posnOfs</span> <span class='hs-varop'>.</span> <span class='hs-varid'>tokPosn</span>
<a name="line-83"></a>
<a name="line-84"></a><a name="tokEnd"></a><span class='hs-definition'>tokEnd</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Tok</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Point</span>
<a name="line-85"></a><span class='hs-definition'>tokEnd</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>tokBegin</span> <span class='hs-varid'>t</span> <span class='hs-varop'>+~</span> <span class='hs-varid'>tokLen</span> <span class='hs-varid'>t</span>
<a name="line-86"></a>
<a name="line-87"></a><a name="instance%20Show%20(Tok%20t)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Show</span> <span class='hs-layout'>(</span><span class='hs-conid'>Tok</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-88"></a> <span class='hs-varid'>show</span> <span class='hs-varid'>tok</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>tokPosn</span> <span class='hs-varid'>tok</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span> <span class='hs-str'>": "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>tokT</span> <span class='hs-varid'>tok</span><span class='hs-layout'>)</span>
<a name="line-89"></a>
<a name="line-90"></a><a name="Posn"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Posn</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Posn</span> <span class='hs-layout'>{</span>
<a name="line-91"></a> <span class='hs-varid'>posnOfs</span> <span class='hs-keyglyph'>::</span> <span class='hs-varop'>!</span><span class='hs-conid'>Point</span>
<a name="line-92"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>posnLine</span> <span class='hs-keyglyph'>::</span> <span class='hs-varop'>!</span><span class='hs-conid'>Int</span>
<a name="line-93"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>posnCol</span> <span class='hs-keyglyph'>::</span> <span class='hs-varop'>!</span><span class='hs-conid'>Int</span>
<a name="line-94"></a> <span class='hs-layout'>}</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Ix</span><span class='hs-layout'>)</span>
<a name="line-95"></a>
<a name="line-96"></a><a name="instance%20Ord%20Posn"></a><span class='hs-comment'>-- TODO: Verify that this is right. /Deniz</span>
<a name="line-97"></a><a name="instance%20Ord%20Posn"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Ord</span> <span class='hs-conid'>Posn</span> <span class='hs-keyword'>where</span>
<a name="line-98"></a> <span class='hs-varid'>compare</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>comparing</span> <span class='hs-varid'>posnOfs</span>
<a name="line-99"></a>
<a name="line-100"></a><a name="instance%20Show%20Posn"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-conid'>Posn</span> <span class='hs-keyword'>where</span>
<a name="line-101"></a> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-conid'>Posn</span> <span class='hs-varid'>o</span> <span class='hs-varid'>l</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"L"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>l</span> <span class='hs-varop'>++</span> <span class='hs-str'>" "</span> <span class='hs-varop'>++</span> <span class='hs-str'>"C"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>c</span> <span class='hs-varop'>++</span> <span class='hs-str'>"@"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>o</span>
<a name="line-102"></a>
<a name="line-103"></a><a name="startPosn"></a><span class='hs-definition'>startPosn</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Posn</span>
<a name="line-104"></a><span class='hs-definition'>startPosn</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Posn</span> <span class='hs-num'>0</span> <span class='hs-num'>1</span> <span class='hs-num'>0</span>
<a name="line-105"></a>
<a name="line-106"></a><a name="moveStr"></a><span class='hs-definition'>moveStr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Posn</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IndexedStr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Posn</span>
<a name="line-107"></a><span class='hs-definition'>moveStr</span> <span class='hs-varid'>posn</span> <span class='hs-varid'>str</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldl'</span> <span class='hs-varid'>moveCh</span> <span class='hs-varid'>posn</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>snd</span> <span class='hs-varid'>str</span><span class='hs-layout'>)</span>
<a name="line-108"></a>
<a name="line-109"></a><a name="moveCh"></a><span class='hs-definition'>moveCh</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Posn</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Posn</span>
<a name="line-110"></a><span class='hs-definition'>moveCh</span> <span class='hs-layout'>(</span><span class='hs-conid'>Posn</span> <span class='hs-varid'>o</span> <span class='hs-varid'>l</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-chr'>'\t'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Posn</span> <span class='hs-layout'>(</span><span class='hs-varid'>o</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>l</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-varop'>+</span><span class='hs-num'>8</span><span class='hs-layout'>)</span> <span class='hs-varop'>`div`</span> <span class='hs-num'>8</span><span class='hs-layout'>)</span><span class='hs-varop'>*</span><span class='hs-num'>8</span><span class='hs-layout'>)</span>
<a name="line-111"></a><span class='hs-definition'>moveCh</span> <span class='hs-layout'>(</span><span class='hs-conid'>Posn</span> <span class='hs-varid'>o</span> <span class='hs-varid'>l</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-chr'>'\n'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Posn</span> <span class='hs-layout'>(</span><span class='hs-varid'>o</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-num'>0</span>
<a name="line-112"></a><span class='hs-definition'>moveCh</span> <span class='hs-layout'>(</span><span class='hs-conid'>Posn</span> <span class='hs-varid'>o</span> <span class='hs-varid'>l</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Posn</span> <span class='hs-layout'>(</span><span class='hs-varid'>o</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>l</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span>
<a name="line-113"></a>
<a name="line-114"></a><a name="alexGetChar"></a><span class='hs-definition'>alexGetChar</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>AlexInput</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Char</span><span class='hs-layout'>,</span> <span class='hs-conid'>AlexInput</span><span class='hs-layout'>)</span>
<a name="line-115"></a><span class='hs-definition'>alexGetChar</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-116"></a><span class='hs-definition'>alexGetChar</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</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-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-varid'>c</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-varid'>rest</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</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-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span><span class='hs-varid'>b</span><span class='hs-layout'>,</span><span class='hs-varid'>rest</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-117"></a>
<a name="line-118"></a><a name="alexGetByte"></a><span class='hs-definition'>alexGetByte</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>AlexInput</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Word8</span><span class='hs-layout'>,</span><span class='hs-conid'>AlexInput</span><span class='hs-layout'>)</span>
<a name="line-119"></a><span class='hs-definition'>alexGetByte</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-varid'>b</span><span class='hs-conop'>:</span><span class='hs-varid'>bs</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-conid'>Just</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-varid'>c</span><span class='hs-layout'>,</span><span class='hs-varid'>bs</span><span class='hs-layout'>,</span><span class='hs-varid'>s</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-120"></a><span class='hs-definition'>alexGetByte</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-conid'>[]</span><span class='hs-layout'>,</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-121"></a><span class='hs-definition'>alexGetByte</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-conid'>[]</span><span class='hs-layout'>,</span> <span class='hs-varid'>c</span><span class='hs-conop'>:</span><span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>utf8Encode</span> <span class='hs-layout'>(</span><span class='hs-varid'>snd</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-122"></a> <span class='hs-layout'>(</span><span class='hs-varid'>b</span><span class='hs-conop'>:</span><span class='hs-varid'>bs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</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'>snd</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>bs</span><span class='hs-layout'>,</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-123"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Nothing</span>
<a name="line-124"></a>
<a name="line-125"></a><a name="alexCollectChar"></a><span class='hs-comment'>{-# ANN alexCollectChar "HLint: ignore Use String" #-}</span>
<a name="line-126"></a><span class='hs-definition'>alexCollectChar</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>AlexInput</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Char</span><span class='hs-keyglyph'>]</span>
<a name="line-127"></a><span class='hs-definition'>alexCollectChar</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-128"></a><span class='hs-definition'>alexCollectChar</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</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-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-varid'>rest</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>c</span> <span class='hs-conop'>:</span> <span class='hs-varid'>alexCollectChar</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-varid'>b</span><span class='hs-layout'>,</span> <span class='hs-varid'>rest</span><span class='hs-layout'>)</span>
<a name="line-129"></a>
<a name="line-130"></a><a name="alexInputPrevChar"></a><span class='hs-definition'>alexInputPrevChar</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>AlexInput</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span>
<a name="line-131"></a><span class='hs-definition'>alexInputPrevChar</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>view</span> <span class='hs-sel'>_1</span>
<a name="line-132"></a>
<a name="line-133"></a><a name="actionConst"></a><span class='hs-comment'>-- | Return a constant token</span>
<a name="line-134"></a><span class='hs-definition'>actionConst</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>token</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Action</span> <span class='hs-varid'>lexState</span> <span class='hs-varid'>token</span>
<a name="line-135"></a><span class='hs-definition'>actionConst</span> <span class='hs-varid'>token</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-sel'>_str</span> <span class='hs-varid'>state</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>state</span><span class='hs-layout'>,</span> <span class='hs-varid'>token</span><span class='hs-layout'>)</span>
<a name="line-136"></a>
<a name="line-137"></a><a name="actionAndModify"></a><span class='hs-comment'>-- | Return a constant token, and modify the lexer state</span>
<a name="line-138"></a><span class='hs-definition'>actionAndModify</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>lexState</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>lexState</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>token</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Action</span> <span class='hs-varid'>lexState</span> <span class='hs-varid'>token</span>
<a name="line-139"></a><span class='hs-definition'>actionAndModify</span> <span class='hs-varid'>modifierFct</span> <span class='hs-varid'>token</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-sel'>_str</span> <span class='hs-varid'>state</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>modifierFct</span> <span class='hs-varid'>state</span><span class='hs-layout'>,</span> <span class='hs-varid'>token</span><span class='hs-layout'>)</span>
<a name="line-140"></a>
<a name="line-141"></a><a name="actionStringAndModify"></a><span class='hs-comment'>-- | Convert the parsed string into a token,</span>
<a name="line-142"></a><span class='hs-comment'>-- and also modify the lexer state</span>
<a name="line-143"></a><span class='hs-definition'>actionStringAndModify</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>token</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Action</span> <span class='hs-varid'>s</span> <span class='hs-varid'>token</span>
<a name="line-144"></a><span class='hs-definition'>actionStringAndModify</span> <span class='hs-varid'>modF</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>istr</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>modF</span> <span class='hs-varid'>s</span><span class='hs-layout'>,</span> <span class='hs-varid'>f</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>snd</span> <span class='hs-varid'>istr</span><span class='hs-layout'>)</span>
<a name="line-145"></a>
<a name="line-146"></a><a name="actionStringConst"></a><span class='hs-comment'>-- | Convert the parsed string into a token</span>
<a name="line-147"></a><span class='hs-definition'>actionStringConst</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>token</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Action</span> <span class='hs-varid'>lexState</span> <span class='hs-varid'>token</span>
<a name="line-148"></a><span class='hs-definition'>actionStringConst</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>indexedStr</span> <span class='hs-varid'>state</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>state</span><span class='hs-layout'>,</span> <span class='hs-varid'>f</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>snd</span> <span class='hs-varid'>indexedStr</span><span class='hs-layout'>)</span>
<a name="line-149"></a>
<a name="line-150"></a><a name="ASI"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>ASI</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>AlexState</span> <span class='hs-varid'>s</span><span class='hs-layout'>,</span> <span class='hs-conid'>AlexInput</span><span class='hs-layout'>)</span>
<a name="line-151"></a>
<a name="line-152"></a><a name="TokenLexer"></a><span class='hs-comment'>-- | Function to (possibly) lex a single token and give us the</span>
<a name="line-153"></a><a name="TokenLexer"></a><span class='hs-comment'>-- remaining input.</span>
<a name="line-154"></a><a name="TokenLexer"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>TokenLexer</span> <span class='hs-varid'>l</span> <span class='hs-varid'>s</span> <span class='hs-varid'>t</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span> <span class='hs-varid'>s</span><span class='hs-layout'>,</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>t</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span> <span class='hs-varid'>s</span><span class='hs-layout'>,</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-155"></a>
<a name="line-156"></a><a name="CharScanner"></a><span class='hs-comment'>-- | Handy alias</span>
<a name="line-157"></a><a name="CharScanner"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>CharScanner</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Scanner</span> <span class='hs-conid'>Point</span> <span class='hs-conid'>Char</span>
<a name="line-158"></a>
<a name="line-159"></a><a name="Lexer"></a><span class='hs-comment'>-- | Generalises lexers. This allows us to easily use lexers which</span>
<a name="line-160"></a><a name="Lexer"></a><span class='hs-comment'>-- don't want to be cornered into the types we have predefined here</span>
<a name="line-161"></a><a name="Lexer"></a><span class='hs-comment'>-- and use in @common.hsinc@.</span>
<a name="line-162"></a><a name="Lexer"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Lexer</span> <span class='hs-varid'>l</span> <span class='hs-varid'>s</span> <span class='hs-varid'>t</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Lexer</span>
<a name="line-163"></a> <span class='hs-layout'>{</span> <span class='hs-sel'>_step</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TokenLexer</span> <span class='hs-varid'>l</span> <span class='hs-varid'>s</span> <span class='hs-varid'>t</span> <span class='hs-varid'>i</span>
<a name="line-164"></a> <span class='hs-layout'>,</span> <span class='hs-sel'>_starting</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Point</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Posn</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>l</span> <span class='hs-varid'>s</span>
<a name="line-165"></a> <span class='hs-layout'>,</span> <span class='hs-sel'>_withChars</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>Point</span><span class='hs-layout'>,</span> <span class='hs-conid'>Char</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>i</span>
<a name="line-166"></a> <span class='hs-layout'>,</span> <span class='hs-sel'>_looked</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>l</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Point</span>
<a name="line-167"></a> <span class='hs-layout'>,</span> <span class='hs-sel'>_statePosn</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>l</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Posn</span>
<a name="line-168"></a> <span class='hs-layout'>,</span> <span class='hs-sel'>_lexEmpty</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>t</span>
<a name="line-169"></a> <span class='hs-layout'>,</span> <span class='hs-sel'>_startingState</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>s</span>
<a name="line-170"></a> <span class='hs-layout'>}</span>
<a name="line-171"></a>
<a name="line-172"></a><a name="StyleLexer"></a><span class='hs-comment'>-- | Just like 'Lexer' but also knows how to turn its tokens into</span>
<a name="line-173"></a><a name="StyleLexer"></a><span class='hs-comment'>-- 'StyleName's.</span>
<a name="line-174"></a><a name="StyleLexer"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>StyleLexer</span> <span class='hs-varid'>l</span> <span class='hs-varid'>s</span> <span class='hs-varid'>t</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>StyleLexer</span>
<a name="line-175"></a> <span class='hs-layout'>{</span> <span class='hs-sel'>_tokenToStyle</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>StyleName</span>
<a name="line-176"></a> <span class='hs-layout'>,</span> <span class='hs-sel'>_styleLexer</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Lexer</span> <span class='hs-varid'>l</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-conid'>Tok</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varid'>i</span>
<a name="line-177"></a> <span class='hs-layout'>}</span>
<a name="line-178"></a>
<a name="line-179"></a><a name="StyleLexerASI"></a><span class='hs-comment'>-- | 'StyleLexer' over 'ASI'.</span>
<a name="line-180"></a><a name="StyleLexerASI"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>StyleLexerASI</span> <span class='hs-varid'>s</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>StyleLexer</span> <span class='hs-conid'>AlexState</span> <span class='hs-varid'>s</span> <span class='hs-varid'>t</span> <span class='hs-conid'>AlexInput</span>
<a name="line-181"></a>
<a name="line-182"></a><a name="commonLexer"></a><span class='hs-comment'>-- | Defines a 'Lexer' for 'ASI'. This exists to make using the new</span>
<a name="line-183"></a><span class='hs-comment'>-- 'lexScanner' easier if you're using 'ASI' as all our lexers do</span>
<a name="line-184"></a><span class='hs-comment'>-- today, 23-08-2014.</span>
<a name="line-185"></a><span class='hs-definition'>commonLexer</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>ASI</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Tok</span> <span class='hs-varid'>t</span><span class='hs-layout'>,</span> <span class='hs-conid'>ASI</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-186"></a> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span>
<a name="line-187"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Lexer</span> <span class='hs-conid'>AlexState</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-conid'>Tok</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-conid'>AlexInput</span>
<a name="line-188"></a><span class='hs-definition'>commonLexer</span> <span class='hs-varid'>l</span> <span class='hs-varid'>st0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Lexer</span>
<a name="line-189"></a> <span class='hs-layout'>{</span> <span class='hs-sel'>_step</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>l</span>
<a name="line-190"></a> <span class='hs-layout'>,</span> <span class='hs-sel'>_starting</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>AlexState</span>
<a name="line-191"></a> <span class='hs-layout'>,</span> <span class='hs-sel'>_withChars</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>c</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-conid'>[]</span><span class='hs-layout'>,</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-192"></a> <span class='hs-layout'>,</span> <span class='hs-sel'>_looked</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lookedOffset</span>
<a name="line-193"></a> <span class='hs-layout'>,</span> <span class='hs-sel'>_statePosn</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>stPosn</span>
<a name="line-194"></a> <span class='hs-layout'>,</span> <span class='hs-sel'>_lexEmpty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-str'>"Yi.Lexer.Alex.commonLexer: lexEmpty"</span>
<a name="line-195"></a> <span class='hs-layout'>,</span> <span class='hs-sel'>_startingState</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>st0</span>
<a name="line-196"></a> <span class='hs-layout'>}</span>
<a name="line-197"></a>
<a name="line-198"></a><a name="lexScanner"></a><span class='hs-comment'>-- | Combine a character scanner with a lexer to produce a token</span>
<a name="line-199"></a><span class='hs-comment'>-- scanner. May be used together with 'mkHighlighter' to produce a</span>
<a name="line-200"></a><span class='hs-comment'>-- 'Highlighter', or with 'linearSyntaxMode' to produce a 'Mode'.</span>
<a name="line-201"></a><span class='hs-definition'>lexScanner</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Lexer</span> <span class='hs-varid'>l</span> <span class='hs-varid'>s</span> <span class='hs-varid'>t</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CharScanner</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Scanner</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span>
<a name="line-202"></a><span class='hs-definition'>lexScanner</span> <span class='hs-conid'>Lexer</span> <span class='hs-layout'>{</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>}</span> <span class='hs-varid'>src</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Scanner</span>
<a name="line-203"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>scanLooked</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>_looked</span>
<a name="line-204"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>scanInit</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>_starting</span> <span class='hs-sel'>_startingState</span> <span class='hs-num'>0</span> <span class='hs-varid'>startPosn</span>
<a name="line-205"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>scanRun</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>st</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>posnOfs</span> <span class='hs-varop'>$</span> <span class='hs-sel'>_statePosn</span> <span class='hs-varid'>st</span> <span class='hs-keyword'>of</span>
<a name="line-206"></a> <span class='hs-num'>0</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>unfoldLexer</span> <span class='hs-sel'>_step</span> <span class='hs-layout'>(</span><span class='hs-varid'>st</span><span class='hs-layout'>,</span> <span class='hs-sel'>_withChars</span> <span class='hs-chr'>'\n'</span> <span class='hs-varop'>$</span> <span class='hs-varid'>scanRun</span> <span class='hs-varid'>src</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span>
<a name="line-207"></a> <span class='hs-varid'>ofs</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>scanRun</span> <span class='hs-varid'>src</span> <span class='hs-layout'>(</span><span class='hs-varid'>ofs</span> <span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-208"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>[]</span>
<a name="line-209"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-varid'>ch</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>rest</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>unfoldLexer</span> <span class='hs-sel'>_step</span> <span class='hs-layout'>(</span><span class='hs-varid'>st</span><span class='hs-layout'>,</span> <span class='hs-sel'>_withChars</span> <span class='hs-varid'>ch</span> <span class='hs-varid'>rest</span><span class='hs-layout'>)</span>
<a name="line-210"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>scanEmpty</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>_lexEmpty</span>
<a name="line-211"></a> <span class='hs-layout'>}</span>
<a name="line-212"></a>
<a name="line-213"></a><a name="unfoldLexer"></a><span class='hs-comment'>-- | unfold lexer into a function that returns a stream of (state, token)</span>
<a name="line-214"></a><span class='hs-definition'>unfoldLexer</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>state</span><span class='hs-layout'>,</span> <span class='hs-varid'>input</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>token</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varid'>state</span><span class='hs-layout'>,</span> <span class='hs-varid'>input</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-215"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>state</span><span class='hs-layout'>,</span> <span class='hs-varid'>input</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>state</span><span class='hs-layout'>,</span> <span class='hs-varid'>token</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-216"></a><span class='hs-definition'>unfoldLexer</span> <span class='hs-varid'>f</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>f</span> <span class='hs-varid'>b</span> <span class='hs-keyword'>of</span>
<a name="line-217"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>[]</span>
<a name="line-218"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>t</span><span class='hs-layout'>,</span> <span class='hs-varid'>b'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>fst</span> <span class='hs-varid'>b</span><span class='hs-layout'>,</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>unfoldLexer</span> <span class='hs-varid'>f</span> <span class='hs-varid'>b'</span>
<a name="line-219"></a>
<a name="line-220"></a><a name="makeLensesWithSuffix"></a><span class='hs-comment'>-- * Lenses</span>
<a name="line-221"></a><span class='hs-definition'>makeLensesWithSuffix</span> <span class='hs-str'>"A"</span> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Posn</span>
<a name="line-222"></a><span class='hs-definition'>makeLensesWithSuffix</span> <span class='hs-str'>"A"</span> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Tok</span>
<a name="line-223"></a><a name="makeLenses"></a><span class='hs-definition'>makeLenses</span> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Lexer</span>
<a name="line-224"></a><span class='hs-definition'>makeLenses</span> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>StyleLexer</span>
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