Top 9 Grammar Open-Source Projects

ohm

10 4,877 6.8 JavaScript

A library and language for building parsers, interpreters, compilers, etc.

Project mention: Ohm: A library and language for building parsers, interpreters, compilers, etc. | news.ycombinator.com | 2023-10-31

Building an interpreter or a compiler from a grammar is an interesting idea. I can't immediately see how to go about it - the grammar would need to match on SSA or similar.
The examples have a lisp-like interpreter at https://github.com/ohmjs/ohm/blob/main/examples/simple-lisp/... which definitely uses a grammar for parsing and might use a generic AST representation.
Will have to think more - a grammar might be a worthwhile way to specify a nanopass style compiler pipeline.

Chevrotain

3 2,397 6.7 TypeScript

Parser Building Toolkit for JavaScript

Project mention: Ohm: A library and language for building parsers, interpreters, compilers, etc. | news.ycombinator.com | 2023-10-31

How does this compare with Chevrotain[1]?
More specifically, can I build lexers with Ohm? Can it generate a syntax diagram from a grammar?
[1]: https://github.com/chevrotain/chevrotain

SurveyJS

surveyjs.io sponsored

Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
kaldi-active-grammar

10 329 0.0 Python

Python Kaldi speech recognition with grammars that can be set active/inactive dynamically at decode-time

Project mention: Ask HN: How do you get started with adding voice commands to a computer system? | news.ycombinator.com | 2023-11-21

https://github.com/dictation-toolbox/dragonfly
https://github.com/daanzu/kaldi-active-grammar

Caster

7 328 2.9 Python

Dragonfly-Based Voice Programming and Accessibility Toolkit
noam

1 200 3.1 JavaScript

JavaScript library for working with automata and grammars for regular and context-free languages
autumn

3 119 0.0 Java

A Java parser combinator library written with an unmatched feature set.
Lexepars

1 7 0.0 C#

Concise monadic parser combinator library with separate lexer/parser phases, off-side rule and big-size input support.
InfluxDB

www.influxdata.com sponsored

Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
panini

1 6 0.0 Rust

A general-purpose parser framework in Rust.
Recognition-of-logical-document-structures

2 5 0.0 C++

First approach for recognizing logical document structures like texts, sentences, segments, words, chars and sentence/segment depth based on recurrent neural network grammars.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).