const Error = error{
    unexpected_result,
};

const main = fn () Error!void {
    const a = foo(5);
    const b = foo(5);
    if (a - b != 0) {
        return Error.unexpected_result;
    }
}

const foo = fn (arg: s32) s32 {
    if (arg > 1) {
        if (arg < 5) {
            return 6;
        } else {
            return 5;
        }
    } else {
        return 0;
    }
}