std.concurrency doesn't like structs, classes?

["Luís]

On Thursday, 23 May 2013 at 18:38:05 UTC, Ali Çehreli wrote:
> As a workaround, try immutable(S*) (S is a struct). You must 
> manage the lifetime of the object of course.

I was actually investigating std.concurrency to try to understand 
the mechanism of dispatching the messages of different types (I 
needed to figure out a mechanism to accept subclasses).

Since some things were not clear to me, I thought the easier 
solution was just to progressively strip std.concurrency, until I 
isolated the functionality I wanted. But now that seems a dead 
end, since std.concurrency itself does not work for classes.