<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html> <head> <!-- Generated by HsColour, http://www.cs.york.ac.uk/fp/darcs/hscolour/ --> <title>Text/JSON/Parsec.hs</title> <link type='text/css' rel='stylesheet' href='hscolour.css' /> </head> <body> <pre><a name="line-1"></a><span class='hs-comment'>--------------------------------------------------------------------</span> <a name="line-2"></a><span class='hs-comment'>-- |</span> <a name="line-3"></a><span class='hs-comment'>-- Module : Text.JSON.Parsec</span> <a name="line-4"></a><span class='hs-comment'>-- Copyright : (c) Galois, Inc. 2007-2009</span> <a name="line-5"></a><span class='hs-comment'>--</span> <a name="line-6"></a><span class='hs-comment'>-- Maintainer: Sigbjorn Finne <sof@galois.com></span> <a name="line-7"></a><span class='hs-comment'>-- Stability : provisional</span> <a name="line-8"></a><span class='hs-comment'>-- Portability: portable</span> <a name="line-9"></a><span class='hs-comment'>--</span> <a name="line-10"></a><span class='hs-comment'>-- Parse JSON values using the Parsec combinators.</span> <a name="line-11"></a> <a name="line-12"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>JSON</span><span class='hs-varop'>.</span><span class='hs-conid'>Parsec</span> <a name="line-13"></a> <span class='hs-layout'>(</span> <span class='hs-varid'>p_value</span> <a name="line-14"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>p_null</span> <a name="line-15"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>p_boolean</span> <a name="line-16"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>p_array</span> <a name="line-17"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>p_string</span> <a name="line-18"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>p_object</span> <a name="line-19"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>p_number</span> <a name="line-20"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>p_js_string</span> <a name="line-21"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>p_js_object</span> <a name="line-22"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>p_jvalue</span> <a name="line-23"></a> <span class='hs-layout'>,</span> <span class='hs-keyword'>module</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>ParserCombinators</span><span class='hs-varop'>.</span><span class='hs-conid'>Parsec</span> <a name="line-24"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <a name="line-25"></a> <a name="line-26"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>JSON</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span> <a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>ParserCombinators</span><span class='hs-varop'>.</span><span class='hs-conid'>Parsec</span> <a name="line-28"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</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'>Char</span> <a name="line-30"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Numeric</span> <a name="line-31"></a> <a name="line-32"></a><a name="p_value"></a><span class='hs-definition'>p_value</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-conid'>JSValue</span> <a name="line-33"></a><span class='hs-definition'>p_value</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>spaces</span> <span class='hs-varop'>*></span> <span class='hs-varid'>p_jvalue</span> <a name="line-34"></a> <a name="line-35"></a><a name="tok"></a><span class='hs-definition'>tok</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-varid'>a</span> <a name="line-36"></a><span class='hs-definition'>tok</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>p</span> <span class='hs-varop'><*</span> <span class='hs-varid'>spaces</span> <a name="line-37"></a> <a name="line-38"></a><a name="p_jvalue"></a><span class='hs-definition'>p_jvalue</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-conid'>JSValue</span> <a name="line-39"></a><span class='hs-definition'>p_jvalue</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>JSNull</span> <span class='hs-varop'><$</span> <span class='hs-varid'>p_null</span><span class='hs-layout'>)</span> <a name="line-40"></a> <span class='hs-varop'><|></span> <span class='hs-layout'>(</span><span class='hs-conid'>JSBool</span> <span class='hs-varop'><$></span> <span class='hs-varid'>p_boolean</span><span class='hs-layout'>)</span> <a name="line-41"></a> <span class='hs-varop'><|></span> <span class='hs-layout'>(</span><span class='hs-conid'>JSArray</span> <span class='hs-varop'><$></span> <span class='hs-varid'>p_array</span><span class='hs-layout'>)</span> <a name="line-42"></a> <span class='hs-varop'><|></span> <span class='hs-layout'>(</span><span class='hs-conid'>JSString</span> <span class='hs-varop'><$></span> <span class='hs-varid'>p_js_string</span><span class='hs-layout'>)</span> <a name="line-43"></a> <span class='hs-varop'><|></span> <span class='hs-layout'>(</span><span class='hs-conid'>JSObject</span> <span class='hs-varop'><$></span> <span class='hs-varid'>p_js_object</span><span class='hs-layout'>)</span> <a name="line-44"></a> <span class='hs-varop'><|></span> <span class='hs-layout'>(</span><span class='hs-conid'>JSRational</span> <span class='hs-conid'>False</span> <span class='hs-varop'><$></span> <span class='hs-varid'>p_number</span><span class='hs-layout'>)</span> <a name="line-45"></a> <span class='hs-varop'><?></span> <span class='hs-str'>"JSON value"</span> <a name="line-46"></a> <a name="line-47"></a><a name="p_null"></a><span class='hs-definition'>p_null</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-conid'>()</span> <a name="line-48"></a><span class='hs-definition'>p_null</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>tok</span> <span class='hs-layout'>(</span><span class='hs-varid'>string</span> <span class='hs-str'>"null"</span><span class='hs-layout'>)</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span> <a name="line-49"></a> <a name="line-50"></a><a name="p_boolean"></a><span class='hs-definition'>p_boolean</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-conid'>Bool</span> <a name="line-51"></a><span class='hs-definition'>p_boolean</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>tok</span> <a name="line-52"></a> <span class='hs-layout'>(</span> <span class='hs-layout'>(</span><span class='hs-conid'>True</span> <span class='hs-varop'><$</span> <span class='hs-varid'>string</span> <span class='hs-str'>"true"</span><span class='hs-layout'>)</span> <a name="line-53"></a> <span class='hs-varop'><|></span> <span class='hs-layout'>(</span><span class='hs-conid'>False</span> <span class='hs-varop'><$</span> <span class='hs-varid'>string</span> <span class='hs-str'>"false"</span><span class='hs-layout'>)</span> <a name="line-54"></a> <span class='hs-layout'>)</span> <a name="line-55"></a> <a name="line-56"></a><a name="p_array"></a><span class='hs-definition'>p_array</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>JSValue</span><span class='hs-keyglyph'>]</span> <a name="line-57"></a><span class='hs-definition'>p_array</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>between</span> <span class='hs-layout'>(</span><span class='hs-varid'>tok</span> <span class='hs-layout'>(</span><span class='hs-varid'>char</span> <span class='hs-chr'>'['</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>tok</span> <span class='hs-layout'>(</span><span class='hs-varid'>char</span> <span class='hs-chr'>']'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-58"></a> <span class='hs-varop'>$</span> <span class='hs-varid'>p_jvalue</span> <span class='hs-varop'>`sepBy`</span> <span class='hs-varid'>tok</span> <span class='hs-layout'>(</span><span class='hs-varid'>char</span> <span class='hs-chr'>','</span><span class='hs-layout'>)</span> <a name="line-59"></a> <a name="line-60"></a><a name="p_string"></a><span class='hs-definition'>p_string</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-conid'>String</span> <a name="line-61"></a><span class='hs-definition'>p_string</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>between</span> <span class='hs-layout'>(</span><span class='hs-varid'>tok</span> <span class='hs-layout'>(</span><span class='hs-varid'>char</span> <span class='hs-chr'>'"'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>char</span> <span class='hs-chr'>'"'</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>many</span> <span class='hs-varid'>p_char</span><span class='hs-layout'>)</span> <a name="line-62"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>p_char</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>char</span> <span class='hs-chr'>'\\'</span> <span class='hs-varop'>>></span> <span class='hs-varid'>p_esc</span><span class='hs-layout'>)</span> <a name="line-63"></a> <span class='hs-varop'><|></span> <span class='hs-layout'>(</span><span class='hs-varid'>satisfy</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>x</span> <span class='hs-varop'>/=</span> <span class='hs-chr'>'"'</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>x</span> <span class='hs-varop'>/=</span> <span class='hs-chr'>'\\'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-64"></a> <a name="line-65"></a> <span class='hs-varid'>p_esc</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-chr'>'"'</span> <span class='hs-varop'><$</span> <span class='hs-varid'>char</span> <span class='hs-chr'>'"'</span><span class='hs-layout'>)</span> <a name="line-66"></a> <span class='hs-varop'><|></span> <span class='hs-layout'>(</span><span class='hs-chr'>'\\'</span> <span class='hs-varop'><$</span> <span class='hs-varid'>char</span> <span class='hs-chr'>'\\'</span><span class='hs-layout'>)</span> <a name="line-67"></a> <span class='hs-varop'><|></span> <span class='hs-layout'>(</span><span class='hs-chr'>'/'</span> <span class='hs-varop'><$</span> <span class='hs-varid'>char</span> <span class='hs-chr'>'/'</span><span class='hs-layout'>)</span> <a name="line-68"></a> <span class='hs-varop'><|></span> <span class='hs-layout'>(</span><span class='hs-chr'>'\b'</span> <span class='hs-varop'><$</span> <span class='hs-varid'>char</span> <span class='hs-chr'>'b'</span><span class='hs-layout'>)</span> <a name="line-69"></a> <span class='hs-varop'><|></span> <span class='hs-layout'>(</span><span class='hs-chr'>'\f'</span> <span class='hs-varop'><$</span> <span class='hs-varid'>char</span> <span class='hs-chr'>'f'</span><span class='hs-layout'>)</span> <a name="line-70"></a> <span class='hs-varop'><|></span> <span class='hs-layout'>(</span><span class='hs-chr'>'\n'</span> <span class='hs-varop'><$</span> <span class='hs-varid'>char</span> <span class='hs-chr'>'n'</span><span class='hs-layout'>)</span> <a name="line-71"></a> <span class='hs-varop'><|></span> <span class='hs-layout'>(</span><span class='hs-chr'>'\r'</span> <span class='hs-varop'><$</span> <span class='hs-varid'>char</span> <span class='hs-chr'>'r'</span><span class='hs-layout'>)</span> <a name="line-72"></a> <span class='hs-varop'><|></span> <span class='hs-layout'>(</span><span class='hs-chr'>'\t'</span> <span class='hs-varop'><$</span> <span class='hs-varid'>char</span> <span class='hs-chr'>'t'</span><span class='hs-layout'>)</span> <a name="line-73"></a> <span class='hs-varop'><|></span> <span class='hs-layout'>(</span><span class='hs-varid'>char</span> <span class='hs-chr'>'u'</span> <span class='hs-varop'>*></span> <span class='hs-varid'>p_uni</span><span class='hs-layout'>)</span> <a name="line-74"></a> <span class='hs-varop'><?></span> <span class='hs-str'>"escape character"</span> <a name="line-75"></a> <a name="line-76"></a> <span class='hs-varid'>p_uni</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>check</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>count</span> <span class='hs-num'>4</span> <span class='hs-layout'>(</span><span class='hs-varid'>satisfy</span> <span class='hs-varid'>isHexDigit</span><span class='hs-layout'>)</span> <a name="line-77"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>check</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>code</span> <span class='hs-varop'><=</span> <span class='hs-varid'>max_char</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pure</span> <span class='hs-layout'>(</span><span class='hs-varid'>toEnum</span> <span class='hs-varid'>code</span><span class='hs-layout'>)</span> <a name="line-78"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>empty</span> <a name="line-79"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>code</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fst</span> <span class='hs-varop'>$</span> <span class='hs-varid'>head</span> <span class='hs-varop'>$</span> <span class='hs-varid'>readHex</span> <span class='hs-varid'>x</span> <a name="line-80"></a> <span class='hs-varid'>max_char</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromEnum</span> <span class='hs-layout'>(</span><span class='hs-varid'>maxBound</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Char</span><span class='hs-layout'>)</span> <a name="line-81"></a> <a name="line-82"></a><a name="p_object"></a><span class='hs-definition'>p_object</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span><span class='hs-conid'>JSValue</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <a name="line-83"></a><span class='hs-definition'>p_object</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>between</span> <span class='hs-layout'>(</span><span class='hs-varid'>tok</span> <span class='hs-layout'>(</span><span class='hs-varid'>char</span> <span class='hs-chr'>'{'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>tok</span> <span class='hs-layout'>(</span><span class='hs-varid'>char</span> <span class='hs-chr'>'}'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-84"></a> <span class='hs-varop'>$</span> <span class='hs-varid'>p_field</span> <span class='hs-varop'>`sepBy`</span> <span class='hs-varid'>tok</span> <span class='hs-layout'>(</span><span class='hs-varid'>char</span> <span class='hs-chr'>','</span><span class='hs-layout'>)</span> <a name="line-85"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>p_field</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>(,)</span> <span class='hs-varop'><$></span> <span class='hs-layout'>(</span><span class='hs-varid'>p_string</span> <span class='hs-varop'><*</span> <span class='hs-varid'>tok</span> <span class='hs-layout'>(</span><span class='hs-varid'>char</span> <span class='hs-chr'>':'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'><*></span> <span class='hs-varid'>p_jvalue</span> <a name="line-86"></a> <a name="line-87"></a><a name="p_number"></a><span class='hs-definition'>p_number</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-conid'>Rational</span> <a name="line-88"></a><span class='hs-definition'>p_number</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getInput</span> <a name="line-89"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>readSigned</span> <span class='hs-varid'>readFloat</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>of</span> <a name="line-90"></a> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-layout'>,</span><span class='hs-varid'>s1</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>n</span> <span class='hs-varop'><$</span> <span class='hs-varid'>setInput</span> <span class='hs-varid'>s1</span> <a name="line-91"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>empty</span> <a name="line-92"></a> <a name="line-93"></a><a name="p_js_string"></a><span class='hs-definition'>p_js_string</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-conid'>JSString</span> <a name="line-94"></a><span class='hs-definition'>p_js_string</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toJSString</span> <span class='hs-varop'><$></span> <span class='hs-varid'>p_string</span> <a name="line-95"></a> <a name="line-96"></a><a name="p_js_object"></a><span class='hs-definition'>p_js_object</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-layout'>(</span><span class='hs-conid'>JSObject</span> <span class='hs-conid'>JSValue</span><span class='hs-layout'>)</span> <a name="line-97"></a><span class='hs-definition'>p_js_object</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toJSObject</span> <span class='hs-varop'><$></span> <span class='hs-varid'>p_object</span> <a name="line-98"></a> <a name="line-99"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-100"></a><span class='hs-comment'>-- XXX: Because Parsec is not Applicative yet...</span> <a name="line-101"></a> <a name="line-102"></a><a name="pure"></a><span class='hs-definition'>pure</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-varid'>a</span> <a name="line-103"></a><span class='hs-definition'>pure</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <a name="line-104"></a> <a name="line-105"></a><a name="<*>"></a><span class='hs-layout'>(</span><span class='hs-varop'><*></span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-varid'>b</span> <a name="line-106"></a><span class='hs-layout'>(</span><span class='hs-varop'><*></span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ap</span> <a name="line-107"></a> <a name="line-108"></a><a name="*>"></a><span class='hs-layout'>(</span><span class='hs-varop'>*></span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-varid'>b</span> <a name="line-109"></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> <a name="line-110"></a> <a name="line-111"></a><a name="<*"></a><span class='hs-layout'>(</span><span class='hs-varop'><*</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-varid'>a</span> <a name="line-112"></a><a name="m"></a><span class='hs-definition'>m</span> <span class='hs-varop'><*</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>m</span><span class='hs-layout'>;</span> <span class='hs-varid'>n</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-varid'>x</span> <a name="line-113"></a> <a name="line-114"></a><a name="empty"></a><span class='hs-definition'>empty</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-varid'>a</span> <a name="line-115"></a><span class='hs-definition'>empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mzero</span> <a name="line-116"></a> <a name="line-117"></a><a name="<$>"></a><span class='hs-layout'>(</span><span class='hs-varop'><$></span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-varid'>b</span> <a name="line-118"></a><span class='hs-layout'>(</span><span class='hs-varop'><$></span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <a name="line-119"></a> <a name="line-120"></a><a name="<$"></a><span class='hs-layout'>(</span><span class='hs-varop'><$</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CharParser</span> <span class='hs-conid'>()</span> <span class='hs-varid'>a</span> <a name="line-121"></a><a name="x"></a><span class='hs-definition'>x</span> <span class='hs-varop'><$</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>m</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-varid'>x</span> <a name="line-122"></a> </pre></body> </html>