Storing a reference

[Yuxuan Shui via Digitalmars-d-learn]

On Thursday, 1 September 2016 at 21:07:36 UTC, Steven 
Schveighoffer wrote:
> On 9/1/16 4:38 PM, Yuxuan Shui wrote:
>> [...]
>
> Referring to a null object is not a problem. Your program 
> crashes ungracefully, but does not corrupt memory. However, in 
> either approach, it can easily end up being a dangling pointer.
>
> But to refer to a null location is quite easy:
>
> int *foo; // null ptr
> auto a = x(*foo);
> assert(&a.xa() == null);
>
> Your approach is less desirable because of the closure to point 
> at a given reference which can be had with just a reference. 
> Needless allocation.
>
> -Steve

Makes sense. Thanks!