Lips Scheme 1.0.0-beta.22 with full call/cc and TCO

In plain words

LIPS Scheme 1.0.0-beta.22 is a Scheme programming language implementation that introduces full call/cc continuations and tail call optimization. It allows developers to write functional programs with advanced control flow features, including early exits from recursive functions. The software is designed for programmers interested in Lisp-like languages and functional programming paradigms.

written from the facts on this page · September 2026

From the sources

LIPS is powerful lisp based on Scheme. It's compatible with R5RS and mostly with R7RS. But It add lot of features on top of Scheme. The interpreter is written in JavaScript and it work in Browser and Node.js.

I'm excited to introduce a new beta version of LIPS Scheme. The most important features of this version are full continuations and TCO (Tail Call Optimization) . They were inspired by JS-Scheme by Alex Yakovlev. You can now finally play with continuations . Here is a simple example of an early exit from a recursive named let. Finally, LIPS has native JavaScript generators. If you're not familiar with generators, they are like a function that can yield a value, which suspends the execution and then resumes it later. Now, thanks to continuations , the same thing can be done in LIPS Scheme. The implementation of generator use that protocol, the missing piece to be able to create a generator in…from lips.js.org

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