nearley
Stylecow
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nearley | Stylecow | |
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3 | - | |
3,548 | 163 | |
- | 1.2% | |
0.0 | 0.0 | |
8 months ago | about 4 years ago | |
JavaScript | JavaScript | |
MIT License | MIT License |
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nearley
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Writing a C compiler in 500 lines of Python
While I suspect I would learn more writing a tokenizer and parsing logic myself I find grammars much easier to read and maintain.
ANTLR is pretty good and is supported across several languages and something I had previously used for some quick Elasticsearch query syntax munging in Python. It also means you can often start from an already existing grammar.
The JS version of ANTLR didn't seem to work for me so for the SQL/JSONPath stuff ended up using the Moo lever and Nearly parser which was rather pleasant. https://nearley.js.org
- Parser generators vs. handwritten parsers: surveying major languages in 2021
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Applicative Parsing
Parsers in nearley.js [1] are written in a very readable EBNF-like DSL; then they get desugared down to a JS file that's a lot like your snippet.
[1] https://github.com/kach/nearley
Stylecow
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Tracking mentions began in Dec 2020.
What are some alternatives?
PEG.js - PEG.js: Parser generator for JavaScript
URI.js - Javascript URL mutation library
Jison - Bison in JavaScript.
remark - markdown processor powered by plugins part of the @unifiedjs collective
Chevrotain - Parser Building Toolkit for JavaScript
js-yaml - JavaScript YAML parser and dumper. Very fast.
markdown-it - Markdown parser, done right. 100% CommonMark support, extensions, syntax plugins & high speed
xml2js - XML to JavaScript object converter.
strip-css-comments - Strip comments from CSS
parse5 - HTML parsing/serialization toolset for Node.js. WHATWG HTML Living Standard (aka HTML5)-compliant.
x-ray - The next web scraper. See through the <html> noise.