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<!doctype html><html> <head> <title>CodeMirror: PEG.js Mode</title> <meta charset="utf-8"/> <link rel=stylesheet href="../../doc/docs.css">
<link rel="stylesheet" href="../../lib/codemirror.css"> <script src="../../lib/codemirror.js"></script> <script src="../javascript/javascript.js"></script> <script src="pegjs.js"></script> <style>.CodeMirror {border-top: 1px solid black; border-bottom: 1px solid black;}</style> </head> <body> <div id=nav> <a href="https://codemirror.net/5"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png" alt=""></a>
<ul> <li><a href="../../index.html">Home</a> <li><a href="../../doc/manual.html">Manual</a> <li><a href="https://github.com/codemirror/codemirror5">Code</a> </ul> <ul> <li><a href="../index.html">Language modes</a> <li><a class=active href="#">PEG.js Mode</a> </ul> </div>
<article> <h2>PEG.js Mode</h2> <form><textarea id="code" name="code">/* * Classic example grammar, which recognizes simple arithmetic expressions like * "2*(3+4)". The parser generated from this grammar then computes their value. */
start = additive
additive = left:multiplicative "+" right:additive { return left + right; } / multiplicative
multiplicative = left:primary "*" right:multiplicative { return left * right; } / primary
primary = integer / "(" additive:additive ")" { return additive; }
integer "integer" = digits:[0-9]+ { return parseInt(digits.join(""), 10); }
letter = [a-z]+</textarea></form> <script> var editor = CodeMirror.fromTextArea(document.getElementById("code"), { mode: {name: "pegjs"}, lineNumbers: true }); </script> <h3>The PEG.js Mode</h3> <p> Created by Forbes Lindesay.</p> </article> </body></html>
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