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- <!doctype html>
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- <head>
- <title>CodeMirror: PEG.js Mode</title>
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- <li><a class=active href="#">PEG.js Mode</a>
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- <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>
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