RuneExpression-oriented language toolchain

Parse, check, interpret, compile to Go, and emit TypeScript from a compact language surface.

Get Started

Language

Compact syntax

Functions, blocks, objects, arrays, pattern bodies, and match expressions share a small expression-first model.

Multiple runtimes

Run programs through the interpreter, compile to Go, or emit TypeScript for DOM-style targets.

Built-in tooling

The repository includes parser, checker, formatter, LSP, REPL, core stubs, editor integration, and core library docs.

Overview

Rune is an expression-oriented language toolchain written in Go. It parses and checks Rune source, lowers it to a shared IR, and can interpret it, compile it to Go, or emit TypeScript for DOM-style programs.

rune

add(a: Int, b: Int) -> Int => a + b

main() => {
  @io.println(add(1, 2))
}

The language keeps the surface small: functions map parameters to expressions, blocks return their final expression, data is represented with arrays and record-like objects, and control flow is built from match expressions, pattern bodies, ternary expressions, and ordinary function calls.

Documentation

Getting Started shows the local commands.
Fundamentals documents the full supported syntax.
Core Library lists the built-in modules.
GitHub: oboard/rune-lang hosts the source code.

Chinese documentation is available at 简体中文.