Hacker News Reader

Nobody mentions OMeta? Not the best performance but fast for playing.

Is this what you are referring to? https://github.com/alexwarth/ometa-js

Is it still relevant if it has not been updated for several years?

Perhaps Ometa's younger's brother (Ohm) should have been referenced instead: https://github.com/harc/ohm Unfortunately while it seems to have some very nice features, particularly the separation of grammar and semantics.

Its performance is underwhelming. See a benchmark I've created of JSON parsers implemented using many parsing libraries.

http://sap.github.io/chevrotain/performance/

On V8 (Chrome 60) It is the slowest by far, in most cases by two orders of magnitude...

I'd like to mention Grako/Tatsu: https://pypi.python.org/pypi/tatsu

> TatSu (the successor to Grako) is a tool that takes grammars in a variation of EBNF as input, and outputs memoizing (Packrat) PEG parsers in Python.

(I'm familiar with Grako, haven't used Tatsu yet.)

Reply on news.ycombinator.com