idiomatic D: what to use instead of pointers in constructing a tree data structure?

[Laeeth Isharc via Digitalmars-d-learn]

> this conversation is so funny: well what's wrong with this . 
> It's a keyword...
> Aa Ha ha ha ha , rol.
> Seriously, is it so complicated to use a D editor ? I mean with 
> syntax color...

Man afraid to ask stoopid questions stays stoopid.  And compiler 
error message far from informative.
Not everyone is very visually oriented, and sometimes vi is 
quicker.