Lispjs

A Lisp (Scheme) Interpreter in JavaScript (ES6) referring to lisp.py at (An ((Even Better) Lisp) Interpreter (in Python))

Background

This project is inspired by Peter Norvig's essay: (An ((Even Better) Lisp) Interpreter (in Python)). The author implemented some Scheme syntax in the interpreter, and this essay discussed the implementation of a Lisp(Scheme) Interpreter in Python.

Usage

In browser

Open lispjs.html in a browser. The upper text box is used to input Scheme code.
After inputting Scheme code, click Run button. Then, the evaluation result of Scheme code will be shown in the lower text box.

In source code with console

Example:

let res = load(`(+ 1 (call/cc (lambda (k) (+ 2 (k 3)))))`);
console.log(res); // expected output: 4

The result will printed in the console.

Features

Pure JavaScript (ES6); no dependency lib needed; easy to extend and debug
Follow lisp.py's original style and design as much as possible (special change is commented with // Notice: )
Easy to read and understand with original lisp.py

Acknowledgment

Good essay: (An ((Even Better) Lisp) Interpreter (in Python)) by Peter Norvig
John Hardy's lispy2.js