Static operator overloads are possible why?

[Jarrett Billingsley]

"Giles Bathgate" <gilesbathgate at gmail.com> wrote in message 
news:f63vfc$29vg$1 at digitalmars.com...

> public class Test
> {
> public char[] Name;
>
> public Test opAddAssign(Test value)
> {
> writefln(value.Name);
> //TODO...
> }
> }
>
> int Main()
> {
> Test t;
> Test b = new Test();
>
> t += b; //Runtime exception because t is null
>
> }

You can access static class members through variables which are of that 
class's type.  This applies to all static methods and fields; static 
operator overloads are no exception.  I'm not entirely sure why you can do 
this; it's probably "the way C++ does it."

That being said, I'm not sure why you decided to try a static overload 
instead of just new'ing t.  Another solution would be to make your multicast 
delegate a struct type instead, which wouldn't have to be new'ed; I think 
DFL (very .Net like form library for D) does this.