iolanguage

Io is a programming language focused on expressiveness through simplicity. All values are objects. All actions are messages. Code is a runtime modifiable tree.

[iolanguage @iolanguage]

New Io programming language site and docs up — now targeting WASM/WASI. Work in progress. https://t.co/878uPTarKb

[iolanguage @iolanguage]

This release builds on the stackless changes. New docs in progress.

[iolanguage @iolanguage]

Io just pivoted to WebAssembly. One WASI binary runs everywhere, plus a browser REPL with a bidirectional Io JavaScript bridge. Still early-stage; expect sharp edges. Legacy native build preserved on the native branch.

https://t.co/B4vgItCTR1

[iolanguage @iolanguage]

Io 2026.03.06-stackless-alpha:
Eval loop now runs on heap-allocated frames instead of C stack recursion. This enables portable coroutines and first-class continuations without platform-specific assembly, setjmp/longjmp or ucontext.
https://t.co/B4vgItCTR1

[iolanguage @iolanguage]

@blu_blood_hero @Nikso Nice! Does this implementation support coroutines? Is the Io stack separated from the JS stack?

[Nikso @Nikso]

I've created a @iolanguage (partial) implementation in javascript. what do you think? https://t.co/Phb8H5h45x

[iolanguage @iolanguage]

This version supports an emscripten fibers implementation of coroutines. Would like to add a transparent Io/JS bridge, and examples of using coros to eliminate JS callback hell when time permits.

[iolanguage @iolanguage]

Experimental online Io REPL is up: https://t.co/Uih49KYi7q

Exmscripten was used to compile Io to WASM. Works on desktop, but there's bug on mobile browsers I haven't figured out yet. Any ideas?

[Agam @agambrahma]

Created a template on @Replit for @iolanguage here: https://t.co/RdU51YwHoz

[iolanguage @iolanguage]

Special event on the Smalltalk language (an inspiration for Io) at the Computer History Museum on Sep 1st: https://t.co/rr6dvuAmfK

[iolanguage @iolanguage]

@Karlos_Georgy “ary2d flatten sum” would be more terse and avoid a mutating pop operation

[iolanguage @iolanguage]

@gavr123456789 It was a bit of a trick question. JSON is valid for the Io parser. It only needs to be pulled from the AST, which can be done is several ways.

[iolanguage @iolanguage]

Programming challenge: Can you make a JSON parser in Io that fits in a tweet?

[iolanguage @iolanguage]

Io discussions now on github
https://t.co/LlcWE6DqR3

[iolanguage @iolanguage]

@kamatanay Looks like latest MacOS supports ucontext, which makes things easy.

[iolanguage @iolanguage]

@kamatanay I just got it building natively on M1 but I hacked up the Coroutine library a bit and need to clean it up before pushing anything.

[iolanguage @iolanguage]

@kamatanay @gaetgu Yeah, I'd probably do a simple rewrite in JS first, but with a simple message based instruction set to allow Io managed stacks.

[iolanguage @iolanguage]

Has anyone done a native M1 build of Io?

[iolanguage @iolanguage]

@kamatanay @gaetgu At some point, I'd like to do a JS implementation and let JS/node deal with the multi-platform and C bindings issues.

[iolanguage @iolanguage]

@kamatanay @gaetgu I'd like to but it's too much work to deal with a multi-platform C code base with shared library support and lots of C packages.