syntax expr test from Arg(1{d}, a) "x" Arg(1{d}, b) {
    {|
        import * from math;

        fn double(n: Int) -> Int {
            return n * 2;
        \}

        let a = $a;
        let b = $b;

        emit(double(gcd(*a, *b)).to_string());
    |}
}

if 15x10 != 10 {
    panic("This should not happen");
}

if 450x100 != 100 {
    panic("This should not happen");
}