const Error = error{
    unexpected_result,
};

const main = fn() Error!void {
    const a: u32 = 0xffff;
    const b: u32 = 0xffff0000;
    const c: u32 = 0xffffffff;
    const result = c - (a | b);
    if (result != 0) {
        return Error.unexpected_result;
    }
}