PEG.js VS peggy

Here's a javascript library that lets you generate your own language that compiles to Javascript. https://pegjs.org/ It's a compiler generator. You can either use the command line tool and feed it your grammar (You have to write that) and use the generated parser.js which can then run your program, or use peg.js as a dependency and generate your parser at run time before feeding it your program.

The library they're having trouble with is the most common parser generator in javascript, peg.js, which has about 80% of the market

Currently, I have only POC the grammar and language and parser are created using https://pegjs.org/

In past blog posts, where I've written about PEG, I've used Parsimonious in Python, such as three of my solutions to the 2020 Advent Of Code challenges (here, (here)[https://dev.to/meseta/advent-of-code-day-18-finally-using-peg-grammar-in-python-in-the-way-it-s-supposed-to-3253], and (here)[https://dev.to/meseta/advent-of-code-day-19-abusing-peg-grammar-in-python-the-way-it-s-not-supposed-to-2beg]). This time, because the rest of the website is javascript, I will be using PEG.js instead to avoid adding an extra programming language to the codebase.

Update: I started writing a grammar for this language in PEG using PEG.js. This was super fun, I'll take a stab at an interpreter next, that should be much harder.

I was going to post the same thing. This really helped me understand the concepts better back in the day. They also have examples for some popular languages on their github: https://github.com/pegjs/pegjs/tree/master/examples

The PEG.js project got taken over by a new maintainer who locked everyone else out, never shipped a release, and then ignored repeated requests to transfer the project back to the community. So the community forked it to a new project - Peggy, which is where ongoing development happens: https://github.com/peggyjs/peggy

NOTE: The original PEG.js project is not maintained anymore, but there is a new fork, Peggy that is maintained and it's backward compatible with PEG.js so it will be easy to switch.

Thanks. Yes, DTL's core textual syntax is described with PEG. I make use of the Peggy (https://peggyjs.org/) PEG processor to build up the AST that is used to actually process DTL.

There are C based PEG processors, which I've looked at once or twice also, but I haven't sat down to try to convert it. Mostly out of a desire to get the existing module to work well. A working module for one language is better than a partially working module for multiple. :P

hmm this article is a bit outdated; peg.js (mentioned in the article) has been discountined for a few years now; recently the project was picked up by another team under the name peggy.js https://github.com/peggyjs/peggy