By Pablo Santana González
Try the extension yourself by following the instructions in the package published in npm.
This repository contains the source code of @PSantanaGlez13's TFG (Trabajo Fin de Grado/Bachellor's Degree Thesis).
Originally, in my third year of my degree in CS I was on the subject Procesadores de Lenguajes (Language Processors) in which we (the students) developed a programming language throughout the course. In one of the labs, we implemented assignable functions in said language.
The concept of assignable functions consists in defining functions that, as the name implies, are later assigned to. This binds the signature of the function to a certain value, overriding the normal behaviour of the function, just as it can be seen in the following pseudocode example:
fun foo(bar) {
return bar
}
foo(20) // 20, default behaviour
foo(20) = "Other value"
foo(19) // 19
foo(20) // "Other value", overriden default behaviour
foo(21) // 21
This project is an implementation of the assignable functions in JavaScript. Implementing the assignable functions in a real-world programming language (as opposed to the one developed in class) like JavaScript, that has very active community and is constantly being reviewed, poses as a challenge from a language design point of view, since it has to take into consideration the many particularities of the language itself when defining the semantics of this construct. It is also a learning experience in other aspects, such as JavaScript projects and the tools used for their development and the way a programming language is updated.
It started out as a fork of the Babel compiler project. Because of the quantity of packages in the repo (Babel follows a monorepo structure), the build time of the project was long and unnecesary, since the project uses only the parser and the rest are new packages.
Check the directory packages/a-test/in to see various examples of the extension.
The compiler for writing next generation JavaScript.
Babel (pronounced "babble") is a community-driven project used by many companies and projects, and is maintained by a group of volunteers. If you'd like to help support the future of the project, please consider:
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Babel is a tool that helps you write code in the latest version of JavaScript. When your supported environments don't support certain features natively, Babel will help you compile those features down to a supported version.
In
// ES2015 arrow function
[1, 2, 3].map((n) => n + 1);Out
[1, 2, 3].map(function(n) {
return n + 1;
});Try it out at our REPL.
Mostly a handful of volunteers, funded by you! Please check out our team page!
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Check out our website: babeljs.io, and report issues/features at babel/website.
Please read through our CONTRIBUTING.md and fill out the issue template at babel/issues!
Check out:
- Our #development Slack channel and say hi (signup)!
- Issues with the good first issue and help wanted label. We suggest also looking at the closed ones to get a sense of the kinds of issues you can tackle.
Some resources:
- Our CONTRIBUTING.md to get started with setting up the repo.
- Our discussions/notes/roadmap: babel/notes
- Our progress on TC39 proposals: babel/proposals
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The Babel repo is managed as a monorepo that is composed of many npm packages.