Errors and Cleanup

Flint treats errors as values.

Result and Option

The standard path for recoverable errors is Result<T, E>. Optional values use Option<T>.

This keeps error handling in the type system instead of hiding it behind exceptions.

The ? Operator

Use ? to propagate an error upward:

fn setup(bus: spi.Bus) -> Result<(), Error> {
    let device = bus.init()?
    device.configure()?
    return ok(())
}

No Exceptions

Flint does not use exceptions, try/catch, or finally. The language prefers visible control flow and explicit propagation.

Cleanup With defer

defer is the cleanup tool:

fn setup(bus: spi.Bus) -> Result<(), Error> {
    let device = bus.init()?
    defer device.release()

    return ok(())
}

This is especially useful for embedded and systems code where resources are often acquired and released in a tight scope.