Does D support anonymous structs?

[Alex Stevenson]

Derek Parnell wrote:
> On Thu, 23 Feb 2006 17:26:13 +1100, Derek Parnell wrote:
> 
> 
>>With anonymous structs, the definition *is* the declaration.
> 
> 
> Sorry, but I forgot something nice. Anonymous structs don't seem to be
> solving any problem that I've come across, but anonymous unions are very
> nice.
>  
>  struct S
>  {
>    int type;
>    union { 
>       int i; 
>       long l;
>       short s;
>       real r;
>       float f;
>       Foo foo;
>    }
>  }
>  
>  S s;
>  s.type = 1;
>  s.i = 88;
> 
>  ...
>  s.type = 3;
>  s.r = 88.98;
> 
> 

I use anonymous structs because in my code there's an anonymous union of 
anonymous structs - It's not the nicest of ways to do it, but it works 
and I like the anonymousness of it - in C I'd probably just give up and 
accept the extra memory cost of having redundant struct values because C 
always annoys me when I have complex struct-union-struct hierarchies - 
args.args.operand1.bytearg etc.

struct opcode_args
{
     union
     {
     	struct
     	{
             union
             {
	        byte bytearg;
	        ubyte ubytearg;
	        short shortarg;
	        ushort ushortarg;
	        uint regArg1;
             }
         	
             union
             {
	        ushort ushortarg2;
	        byte bytearg2;
	        ubyte ubytearg2;
                 short shortarg2;
                 uint regArg2;
             }

             union
             {
             	ubyte ubytearg3;
             	ushort ushortarg3;
             }
     	}

         struct table_s
         {
             uint regArg;
             uint[] entries;
         }
         table_s table;

         struct lookup_s
         {
             uint regArg;
             uint defaultjump;
             tableentry[] entries;
         }
         lookup_s lookup;
     }
};