I'm a bit confused. Reading through the virtual function's docs
(http://dlang.org/function.html#virtual-functions) it says:
"All non-static non-private non-template member functions are
virtual. This may sound inefficient, but since the D compiler
knows all of the class hierarchy when generating code, all
functions that are not overridden can be optimized to be
non-virtual."
So if all functions are automatically optimized to non-virtual
where applicable, then the "final" keyword is for conceptual
access limitation only. This makes a lot of sense to me. Is there
something I'm not getting that makes you want an explicit
"virtual" keyword?
