var a = [[1,2,3],[4,5,6]];

class foo {
    var i;
    public proc iterate() {
        var j;
        forall(a[i,j]) {
            "a[",i,",",j,"] = ", a[i,j], "\n";
        }
    }
}

proc main()
{
    var x = new foo();
    x.iterate();
}