feeny-ts

Summary

Feeny is a small programming language for learning how to implement dynamic languages and their runtimes.

Feeny was introduced in the U.C. Berkeley course Virtual Machines and Managed Runtimes, taught by Mario Wolczko and Patrick S. Li. Its syntax is largely inspired by another language called Stanza.

This package provides parsing tools and an interpreter written in pure TypeScript. We can use it in the web toolchains. Obviously, It can run in either browser or node. Or some other JavaScript Runtime.

And we have extended Feeny to add some syntax (break/continue, closure, etc.) and a simple type checker(and also type annitations). It's too simple and even not have a type system yet. But I think it will be better in the future.

And we also provide language service toolchains and a VSCode extension that based on above features. It only supports diagnostics (for type check result) and goToDefinition for now.

The codebase is inspired by TypeScript compiler codebase. So you may can see many familiar code if you are also familiar with TypeScript.

The VSCode extension is based on Daniel's Feeny-VSCode which is also a brilliant package.

Happy hacking!

Features

• Lexer

• Parser

  • Parsing
  • Syntax extend
    • Function expression
    • Closure
    • Break / Continue expression

• Binder

  • Symbol tables
  • Get symbol from node

• Checker

  • Type annotations
  • Basic type check
  • ~~Type system~~

• AST Interpreter

  • Feeny features
  • Closure
  • Break / Continue

• Cli

  • Run feeny files

• Language service api

  • Get diagnostics
  • GoToDefinition

• VSCode extension

  • All features in Feeny-VSCode
  • Client / Server
  • Diagnostics
  • GoToDefinition