RapydScript is Self-Hosting

While the RapydScript community is small, our members are passionate about the project, and I’m grateful for that. Salvatore, for example, has put together a number of demos showcasing RapydScript integration with WebGL, NodeBox, GlowScript, and a number of other JavaScript projects. Charles made a Chip’s Challenge clone. There are also examples of RapydScript integration with D3, and a Paint app that uses HTML5 canvas and jQuery. When we started a little over a year ago, members would ask us “can RapydScript work with ___?”. Now instead of just saying “yes” we can often point them to a demo.

To take things one step further, I decided to port the compiler itself (originally in JavaScript) to RapydScript as well. This effort took a few weeks, and a lot of tweaking to a Decompiler project that was put together a while ago. The decompilation wasn’t without issues, and I had to manually tweak some code. Along the way, I also discovered a few minor bugs in RapydScript, which I have fixed in the process. Overall, however, I was pleasantly surprised by how easy it was to port the code. The ported version is not written in Pythonic style that RapydScript tries to encourage because the code-generation was mostly automated, yet it already looks more legible than the JavaScript version it was ported from. I’m very proud of this, since it’s an important step for a compiler to achieve the self-hosting status, and I’m not yet aware of any other Python-to-JS compiler that can say the same (they’re all written in Python, but the subset of Python that the languages use isn’t enough to support the compiler itself).

I hope that this will make future enhancements and tweaks to RapydScript easier, both for myself and other members of the community. As a bonus, I’ve also added kwargs implementation to RapydScript. It works similar to Python, but not completely like it (for performance reasons), I suggest you read the manual on it before use to avoid surprises.

This entry was posted in Languages and tagged , by Alexander Tsepkov. Bookmark the permalink.

About Alexander Tsepkov

Founder and CEO of Pyjeon. He started out with C++, but switched to Python as his main programming language due to its clean syntax and productivity. He often uses other languages for his work as well, such as JavaScript, Perl, and RapydScript. His posts tend to cover user experience, design considerations, languages, web development, Linux environment, as well as challenges of running a start-up.

One thought on “RapydScript is Self-Hosting

  1. We are indeed passionate and for many good raisons. Many years ago I have been very enthousiast too when I discovered Python and I feel the same with RapydScript. I have looked at many other languages which translate (compile to Javascript). Among them Brython, Elm, Skulpt, Python2JS…and others. No one has been as easy as RapydScript when it comes to interoperate with Javascript libraries. With RapydScript the moto could be : ‘Don’t wrap it, just use it’. I enjoin every RapydScript user to make a little comment on how an why they use RapydScript. Thank you again Allex

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