qtty

Why it exists

qtty keeps units explicit in code, so conversions and arithmetic stay readable and harder to misuse. It is used across the Siderust crates, but it is useful on its own too.

Key Features

• Compile-time dimensional analysis
• Zero-cost abstractions
• SI and astronomical units
• No-std compatible

Getting Started

# Add to your Cargo.toml
[dependencies]
qtty = "0.8.5"

# Use physical quantities
use qtty::{AU, KM, DAY};

let distance = 1.523 * AU;  // Mars semi-major axis
let period = 686.97 * DAY;
let speed = distance / period;  // Compiler validates dimensions

Contributing

We welcome contributions! Here's how you can help:

• 1 Fork the repository and create your branch from main
• 2 Make your changes and add tests if applicable
• 3 Ensure all tests pass with cargo test
• 4 Submit a pull request with a clear description

License

This project is licensed under the BSD-3-Clause license. See the LICENSE file for details.