etalian

  $v:|[:int, :bool, :double] = 5;

  $vi: = v.[:int];
  $holds_int: = v.?[:int];

  switch v {
    .[:int]$i { /std cout << "got int:" << i };
    .[:bool] { /std cout << "got bool" };      
    .[:double]$d { /std cout << "got double: " << d };
  };

  $v:|[:int, :int]<(.[0] = 5);

  switch v {
    .[0]$i0 { /std cout << "got first int:" << i0 };
    .[1]$i1 { /std cout << "got second int: " << i1 };
  };