Programs

A SimplicityHL program consists of a main function.

A program may also have type aliases or custom function definitions. The main function comes last in the program, because everything it calls must be defined before it.

type Furlong = u32;
type Mile = u32;

fn to_miles(distance: Either<Furlong, Mile>) -> Mile {
    match distance {
        Left(furlongs: Furlong) => jet::divide_32(furlongs, 8),
        Right(miles: Mile) => miles,
    }
}

fn main() {
    let eight_furlongs: Either<Furlong, Mile> = Left(8);
    let one_mile: Either<Furlong, Mile> = Right(1);
    assert!(jet::eq_32(1, to_miles(eight_furlongs)));
    assert!(jet::eq_32(1, to_miles(one_mile)));
}