Nullable or Optional? Or something else?

[Danny Wilson]

Op Wed, 02 Sep 2009 22:55:53 +0200 schreef Andrei Alexandrescu  
<SeeWebsiteForEmail at erdani.org>:

>>  So if pointers wouldn't be considered evil,  Maybe!T*  would suffice?
>>  Can someone point me out what the big difference is between ref and  
>> simply disallowing pointer arithmitic?  Is it marketing?
>
> Ref means lvalue of type T. Pointer is a type distinct from T. So  
> although NullableRef!T is substitutable for an lvalue of type T,  
> Nullable!(T*) is not.
>
>
> Andrei

Thanks. I googled first but couldn't find some explicit documentation  
about 'ref'  just it being mentioned here and there :-)

Are there any problems with something like:

  Nullable!(ref T)

?