PEG.js VS Crafting Interpreters

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

Build an Interpreter (Chapter 14 on is written in C)

I’m guessing you’ll have to work with the scopes in the resolver:

https://github.com/munificent/craftinginterpreters/blob/mast...

Better open an issue/request wiki edit at https://github.com/munificent/craftinginterpreters/wiki/Lox-implementations

I'm late to the party, but I want to say thank you for sharing this. It's inspiring to look at how much you've built and (hopefully) enjoyed the process of building! I'm loving everything -- your site, your language design, your docs, your builtin libraries, your dev tools. Beyond impressive. People like you are the ones who make HN one of my best places on the internet.

For context on where I'm coming from, about two weeks ago I picked up Crafting Interpreters [1] for fun. I'm finding your clear-yet-concise Compiler internals [2] to be particularly compelling reading, and jumping back and forth between those "how this all works" docs and the live example of this language you actually built do a WASM-compiled tree-blowing-in-the-wind animation is just... just wow. So freaking cool!

I also enjoyed reading the comment thread that inspired you to start on Yaksha and seeing how this project has a wholesome start as inspiration-by-programming-hero. I hope you recognize that a few years later you've now ascended from inspiree to inspirer. I also hope you're still having tons of fun building out Yaksha!

[1] https://www.craftinginterpreters.com/

[2] https://yakshalang.github.io/documentation.html#compiler-int...

There are books which will talk you through the process. Crafting Interpreters is highly spoken of; I used Writing an Interpreter in Go, because I like Go. Then there's Compilers: Principles, Techniques, and Tools (the "Dragon Book"). This is considered heavy, but a classic, it's been around since '86.

I cannot recommend Crafting Interpreters by Robert Nystrom enough, it covers a lot of the stuff you need to know, completely for free.

Crafting Interpreters is a fun primer on language design. It has a complete roadmap to build a fairly simple language, twice. There are some topics it won't touch on, like static type systems, but it provides a great introduction so that you can start tinkering and learn by doing.