Re: do D support something like C# 4.0 co/contra-variance?

[Sean Reque]

Java doesn't have variant generic type parameters. Wildcard types in Java are 
NOT the same thing and are certainly not more powerful. C# doesn't have 
wildcard types because it doesn't implement generics with erasure. See 
http://stackoverflow.com/questions/527766/what-is-the-equivalent-of-java-wildcards-in-c-generics.