Is there a BNF grammar openly available for JavaScript ES6? [closed]

Question

I am working on a merge tool for JavaScript programs, and I need to write a grammar for JavaScript (version >= ES6) in JavaCC format.

For that, I want to use an openly available BNF grammar for ES6, then I would write the grammar in JavaCC format from it.

I was able to find only those (from this Stack Overflow question):

• http://tomcopeland.blogs.com/EcmaScript.html
• http://www.ccs.neu.edu/home/dherman/javascript/

However, these are very old BNFs (and the question on StackOverflow is also very old, from 11 years ago). These grammars work only - and in a limited manner - for versions < ES6.

Do you know about a newer publicly available grammar (BNF, JavaCC file, etc)?

There are parsers available for ES6, such as Esprima, but, since I have to use JavaCC environment, I need the grammar to work on.

Blastema

I'm no language expert, but I don't think ES6 can be expressed purely in terms of a BNF grammar. – Under

It may be an EBNF – Blastema

You may have better luck asking on esdiscuss. – Under

Thanks for the advice, @torazaburo! – Blastema

Answer 1

The fully-approved latest version of ECMAScript (ES2017 = ES8) is at https://www.ecma-international.org/publications/standards/Ecma-262.htm

The latest draft of the next version (ES2018) is at https://github.com/tc39/ecma262 (source repo) and https://tc39.github.io/ecma262/ (rendered).

All of these are openly available and contain a grammar for the language. The grammar notation is mostly BNF with some extensions.

Oppugn

Nice reference! That section (ecma-international.org/ecma-262/8.0/…), summarising the grammar, is basically an EBNF, which might suit well to my needs! I will work on it. Thanks for the answer! – Blastema

This comment should be the accepted answer! – Aegrotat

Is there a grammar file available that isn't HTML? Something that can be passed to tooling? – Cuman

Answer 2

ANTLR

Take a look at the JavaScript grammar from the ANTLR grammars repository.

Bridgettbridgette