What prevents you from doing: ```D import std.sumtype;
class Foo {}
class Bar {}
alias Item = SumType!(Foo, Bar);
void main()
{
Item[] items = [Item(new Foo()), Item(new Bar()), Item(new Foo()),
Item(new Bar())];
foreach (item; items)
{
item.match!(
(Foo v) { /* do something with foo */ },
(_) {}
);
}
}
```
?
It's more effective by the way - you check the type once only.
