buffer-apg-js

<!DOCTYPE html> <html lang="en"> <head> <title>apg-exp</title> <meta charset="utf-8"> <link rel="stylesheet" href="./css/apgexp.css" type="text/css" /> <link rel="stylesheet" href="./css/BrightSide.css" type="text/css" /> <script type="text/javascript" src="./import.js"></script> </head> <body> <div id="wrap"> <div id="header"></div> <div id="content-wrap"> <img src="./images/PointLobosCropped.jpg" width="820" height="120" alt="headerphoto" class="no-border" /> <div id="sidebar"></div> <div id="main-2col">  <h1>Debug Mode</h1> <h3>Syntax</h3> <pre> var exp = new apgExp(pattern, "d"); </pre> Debug mode exposes the APG trace object</a> as <kbd>exp.trace</kbd>. It can be used to display the path of the parser through the parse tree. If the debug property is <kbd>false</kbd>, <kbd>exp.trace</kbd> is undefined. <h3>Example</h3> <pre> var pattern, str, exp, result; pattern = 'word = alpha *(alpha / num)\n'; pattern += 'alpha = %d65-90 / %d97-122\n'; pattern += 'num = %d48-57\n'; exp = new apgExp(pattern, "yd"); str = "ab12"; result = exp.exec(str); if(result){ var htmlPage = exp.trace.toHtmlPage(); /* display as HTML page */ var html = exp.trace.toHtml(); /* display in HTML page */ console.log(html); } /* returns */ </pre> <h1>JavaScript APG Trace</h1> <h3>    display mode: ASCII</h3> <h5>    Thu May 19 2016 14:06:20 GMT-0400 (EDT)</h5> <table class="apg-last2-left-table"> <tr><th>(a)</th><th>(b)</th><th>(c)</th><th>(d)</th><th>(e)</th><th>(f)</th><th>operator</th><th>phrase</th></tr> <tr><td>0</td><td>13</td><td>0</td><td>0</td><td>0</td><td>↓ </td><td>RNM(word) </td><td>ab12•</td></tr> <tr><td>1</td><td>2</td><td>0</td><td>0</td><td>1</td><td>↓ </td><td>.RNM(alpha) </td><td>ab12•</td></tr> <tr><td>2</td><td>1</td><td>0</td><td>1</td><td>1</td><td>↑M</td><td>.RNM(alpha) </td><td>ab12•</td></tr> <tr><td>3</td><td>4</td><td>1</td><td>0</td><td>1</td><td>↓ </td><td>.RNM(alpha) </td><td>b12•</td></tr> <tr><td>4</td><td>3</td><td>1</td><td>1</td><td>1</td><td>↑M</td><td>.RNM(alpha) </td><td>b12•</td></tr> <tr><td>5</td><td>6</td><td>2</td><td>0</td><td>1</td><td>↓ </td><td>.RNM(alpha) </td><td>12•</td></tr> <tr><td>6</td><td>5</td><td>2</td><td>0</td><td>1</td><td>↑N</td><td>.RNM(alpha) </td><td>12•</td></tr> <tr><td>7</td><td>8</td><td>2</td><td>0</td><td>1</td><td>↓ </td><td>.RNM(num) </td><td>12•</td></tr> <tr><td>8</td><td>7</td><td>2</td><td>1</td><td>1</td><td>↑M</td><td>.RNM(num) </td><td>12•</td></tr> <tr><td>9</td><td>10</td><td>3</td><td>0</td><td>1</td><td>↓ </td><td>.RNM(alpha) </td><td>2•</td></tr> <tr><td>10</td><td>9</td><td>3</td><td>0</td><td>1</td><td>↑N</td><td>.RNM(alpha) </td><td>2•</td></tr> <tr><td>11</td><td>12</td><td>3</td><td>0</td><td>1</td><td>↓ </td><td>.RNM(num) </td><td>2•</td></tr> <tr><td>12</td><td>11</td><td>3</td><td>1</td><td>1</td><td>↑M</td><td>.RNM(num) </td><td>2•</td></tr> <tr><td>13</td><td>0</td><td>0</td><td>4</td><td>0</td><td>↑M</td><td>RNM(word) </td><td>ab12•</td></tr> <tr><th>(a)</th><th>(b)</th><th>(c)</th><th>(d)</th><th>(e)</th><th>(f)</th><th>operator</th><th>phrase</th></tr> </table> </table> legend: (a) - line number (b) - matching line number (c) - phrase offset (d) - phrase length (e) - tree depth (f) - operator state     - ↓  phrase opened     - ↑M phrase matched     - ↑E empty phrase matched     - ↑N phrase not matched operator - ALT, CAT, REP, RNM, TRG, TLS, TBS&dagger;, UDT, AND, NOT, BKA, BKN, BKR, ABG, AEN&Dagger; phrase   - up to 80 characters of the phrase being matched          - matched characters          - matched characters in look ahead mode          - matched characters in look behind mode          - remainder characters(not yet examined by parser)          - control characters, TAB, LF, CR, etc. (ASCII mode only)          - 𝜺 empty string          - • end of input string          - … input string display truncated &dagger;original ABNF operators: ALT - alternation CAT - concatenation REP - repetition RNM - rule name TRG - terminal range TLS - terminal literal string (case insensitive) TBS - terminal binary string (case sensitive) &Dagger;super set SABNF operators: UDT - user-defined terminal AND - positive look ahead NOT - negative look ahead BKA - positive look behind BKN - negative look behind BKR - back reference ABG - anchor - begin of input string AEN - anchor - end of input string </div> </div> <div id="footer"></div> </div> </body> </html>