colineberhardt/chasm

A simple compile-to-WebAssembly language

chasm

A very simple compile-to-WebAssembly language

You can play with chasm online.

chasm is a very simple programming language which I have developed to accompany a talk at FullStack Conference NYC. It is not intended to be a fully featured language; rather, its purpose is two-fold:

1. Introduce the basic building blocks of compilers - and show that they aren't that scary or difficult!
2. Reveal some of the inner working of WebAssembly, a new and exciting language / runtime that I think people need to know more about.

The commits in this repo correspond to the live demos in the accompanying talk, if you'd like to follow along at home!

chasm's Issues

The signedLEB128 doesn't work with negative values

I was experimenting with your programming language and noticed that the signedLEB128 function returns [255, 255, 255, 255, 15] for -1 instead of [127].

I think it's because Javascript already stores negative numbers as two's complement. -1 is 0b11111111111111111111111111111111

I have a workaround to fix it, but I'm sure you can implement a more elegant solution faster than me.