o2-rs 0.2.2

Rust port of the ORCΛ esoteric programming language and terminal livecoding environment
Documentation

Rust port of the ORCΛ esoteric programming language and terminal livecoding environment

CI CodeQL Documentation codecov Crates.io License: GPL-3.0-or-later Ko-fi

Install

To download the source code, build the O₂ binary, and install it in $HOME/.cargo/bin in one go run:

cargo install --locked --git https://github.com/coignard/o2

Or install via Homebrew:

brew install coignard/tap/o2

Alternatively, you can manually download the source code and build the O₂ binary with:

git clone https://github.com/coignard/o2
cd o2
cargo build --release
sudo cp target/release/o2 /usr/local/bin/

Install as library

Run the following Cargo command in your project directory:

cargo add o2-rs

Or add the following line to your Cargo.toml:

o2-rs = "0.2.1"

Extensions

O₂ extends the original ORCΛ operator set with one additional glyph.

The _ character is valid in the length port of the MIDI (:) and Mono (%) operators. It creates a note with no scheduled Note Off.

Test

cargo test

Credits

O₂ is a Rust port of the ORCΛ esoteric programming language and livecoding environment, combining the best of the original JS and C implementations by Hundred Rabbits (Devine Lu Linvega & Rek Bell).

License

The O₂ source code is © 2026 René Coignard and licensed under the GNU General Public License v3.0 or later.

The examples/ directory contains patch files from the Orca-C project, © 2017 Hundredrabbits, and are distributed under the MIT License.