This seems far from being well designed not-nullable pointers/class references :-(
And why not? In my test cases, they fulfilled their task / purpose very well.
And you ask for what namespaces are usefull? Aren't you miss them? I do, and so I implement them. You can already write "namespaces" in D, but you must use a (mixin) template (so you have these ugly parents) and for using you have to write: alias tpl_nspace!().print print or directly: tpl_nspace!().print. And that's ugly (because of '!()') and annoying IMO.
For what local is good for and whats the differences between my version and scoped from dmd I will tell later, but as you can see: you have to write: local Foo f = new Foo(); what is more intuitive as Scoped! Foo f = scoped!Foo(); IMO.
