elps

ELPS — An embedded Lisp interpreter for Go programs

• Luther Systems • InsideOut •

ELPS (Ellipse) is a Lisp-1 dialect designed to be embedded within Go applications. It provides a standalone CLI for running, linting, formatting, debugging, and exploring ELPS Lisp code.

Install

go install github.com/luthersystems/elps@latest

Or build from source:

git clone https://github.com/luthersystems/elps.git
cd elps && make

Quick Start

Launch an interactive REPL:

$ elps repl
> (+ 3 1)
4
> (defun greet (name) (format-string "Hello, %s!" name))
> (greet "World")
"Hello, World!"
> ^D

Run a program:

$ elps run prog.lisp

Embed in a Go program:

env := lisp.NewEnv(nil)
env.Runtime.Reader = parser.NewReader()
env.Runtime.Library = &lisp.RelativeFileSystemLibrary{}
lisp.InitializeUserEnv(env)
lisplib.LoadLibrary(env)
env.LoadString(`(debug-print "hello world")`)

Editor Support

• VS Code Extension — Syntax highlighting, LSP, debugger (Marketplace)
• Neovim — DAP configuration
• Emacs — DAP mode configuration
• Helix — DAP configuration
• JetBrains — LSP4IJ plugin configuration

CLI

Documentation

• Language Reference
• Embedding Guide
• Debugging Guide
• LSP Guide
• Go API Reference

Examples

• SICP Examples — Structure and Interpretation of Computer Programs
• User-Defined Types
• WASM Playground (source)

Links

• Luther Systems
• Luther Enterprise
• InsideOut Platform

Community & Support

• Discord
• General Inquiry Call
• Tech Call
• contact@luthersystems.com