Are static variables available to other static variables?

[Jamie]

On Friday, 12 April 2019 at 10:49:19 UTC, Jamie wrote:
> I was trying to declare a static variable dependent on another 
> static variable, but it didn't work. Are static variables not 
> known to other static variables at compile time?
>
> void main()
> {	
> 	C c = new C();
> }
>
> class C
> {
>     static size_t A = 2;
>     static size_t B = 2^^A; // A is not known at compile time
> }

Ok I'm confused... why does that above not work but this does:

void main()
{	
     C c = new C();
}
class C
{
     static size_t A = 2;
     static size_t B;
     static this()
     {
         B = 2^^A;
     }
}