JScript

Building a language while learning at the same time. JScript transpiles to JavaScript.

Goals

• Address pain points in JavaScript
• Use features that JavaScript will never have
• Maintain JavaScript ecosystem interop

Progress

1. Parsing, checking, and generating
   • ✓ | Basic expressions
   • ✓ | Let, fn, assign statements
   • ✓ | Arrays with destructuring
   • ✓ | Syntax for ranges
   • ✓ | If statements & expressions
   • ✗ | Loops
   • ✗ | Structs
   • ✗ | Enums
   • ✗ | Pattern matching
   • ✗ | Impl statements
2. ✗ | Parser rewrite
3. ✗ | Good error messages
4. ✗ | Decide on a macro system
5. ✗ | Lowering and optimizations
6. ✗ | Figure out CLI, standard library, & package manager details

Example

Code will look a lot like rust with a garbage collector.

fn fib(n: num): num {
    match n {
        0 => 1,
        1 => 1,
        _ => fib(n-1) + fib(n-2),
    }
}

Main Inspirations

• Rust
• ReScript