javascript grammar in antlr4
Question
I have used the following link for JavaScript grammar.
https://github.com/ftomassetti/antlr-web-example
However, when I use JavaScript's grammar(JavaScriptLexer.g4 and JavaScriptParser.g4) rather than grammar(todo.g4), it shows a error when defined.
ATNDeserializer.js:171 Uncaught AADB8D7E-AEEF-4415-AD2B-8204D6CF042E
What is this error for?
What do I do to use antlr and JavaScript grammar to create an intermediate code?
My grammar files:
- JavaScriptLexer.g4
- JavaScriptParser.g4
https://github.com/antlr/grammars-v4/tree/master/javascript/javascript
This is my code: index.html
<!DOCTYPE html>
<html>
<head>
<title>ANTLR on the Web</title>
<link rel="stylesheet" type="text/css" href="css/style.css">
<script type="text/javascript" src="lib/require.js"></script>
</head>
<body>
<div id="inputs">
<textarea id="code">
* play with antlr4
* write a tutorial
</textarea>
<br/>
<button id="parse">Parse</button>
</div>
<script type="text/javascript">
var antlr4 = require('antlr4/index');
var JavaScriptParser = require('./generated-parser/JavaScriptParser');
console.log("start");
document.getElementById("parse").addEventListener("click", function(){
// var JavaScriptLexer = require('generated-parser/JavaScriptLexer');
// var input = document.getElementById("code").value;
// var chars = new antlr4.InputStream(input);
// var lexer = new JavaScriptLexer.JavaScriptLexer(chars);
// var tokens = new antlr4.CommonTokenStream(lexer);
// var parser = new JavaScriptParser.JavaScriptParser(tokens);
// parser.buildParseTrees = true;
// var tree = parser.program();
// console.log("Parsed: "+ tree);
// updateTree(tree, parser.ruleNames);
});
</script>
<div id="tree">
</div>
</body>
</html>
1 answers
solution1
0 ACCPTED 2021-02-03 07:50:44
@kaby76 essentially described the problem. You are using an old runtime. The error shows the UUID for the "lexer action" feature . The ANTLR4 tool you used to generate your parser is newer than the runtime. Make sure the runtime matches the tool version (or is newer).
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