A piet interpreter written in rust.

Should™ be fully compliant with the spec.

• arbitrary size stack with Vec (based on available memory)
• arbitrary size integers from the excellent num-bigint library
• ability to read images with limited compression artefacts due to voting behaviour when larger codel sizes are used
• ability to read a wide variety of image formats due to the awesome image crate.
• ability to trace operation of the program in a similar way to npiet, powered by the awesome log and simple_logger crates.