IC20 Language

Language support for IC20, a Rust-inspired language that compiles to IC10 assembly for Stationeers programmable chips.

Features

• Syntax highlighting for IC20 (.ic20) and IC10 (.ic10) files
• Diagnostics, hover, and go-to-definition via bundled language servers (ic20-lsp and ic10-lsp)
• Build command — compile IC20 to IC10 assembly directly from the editor (Ctrl+Shift+B or right-click → Build IC20 File)
• Document formatting for IC20 files
• Snippets for common IC20 constructs (fn, device, let, if, loop, etc.)

Quick Start

1. Install the extension.
2. Open or create a .ic20 file.
3. Start writing IC20 code — you'll get syntax highlighting, diagnostics, and completions out of the box.
4. Press Ctrl+Shift+B to compile to IC10 assembly. The output file is written next to the source (e.g. main.ic20 → main.ic10).
5. Paste the IC10 output into a programmable chip in Stationeers.

Example

device sensor: d0;
device heater: d1;

const SETPOINT: f64 = 300.0;

fn main() {
    loop {
        let temp = sensor.Temperature;
        heater.On = select(temp < SETPOINT, 1.0, 0.0);
        yield;
    }
}

This reads a temperature sensor every game tick and toggles a heater on or off.

Configuration

If the bundled binary for your platform isn't available, the extension falls back to searching your PATH. You can also point each setting at a specific binary.

Building from Source

The extension bundles platform-specific binaries for the language servers and compiler. To build everything yourself:

# Build the Rust binaries
cargo build --release --manifest-path ic20-lsp/Cargo.toml
cargo build --release --manifest-path ic10-lsp/Cargo.toml
cargo build --release --manifest-path ic20c/Cargo.toml

# Bundle the extension
cd ic20-vscode
npm install
npm run package

This produces a .vsix file you can install with code --install-extension <file>.vsix.

Links

• IC20 language specification
• Compiler documentation
• Source code
• Issue tracker

License

MIT