Proposal: user defined attributes

[F i L]

F i L wrote:
>     struct Test {
>         int value;
>         this() { GC.setAttr(&value, NO_SCAN); }
>     }

bleh, should be...

     struct Test {
         int value;
         this(int v) { GC.setAttr(&value, GC.BlkAttr.NO_SCAN); }
     }

Or something like that. I've never actually set GC attributes 
before.

But this also raises another issue. Structs don't have default 
constructors, so applying NoScan attributes (by default) is, to 
my knowledge, impossible. Whereas it could (?) be possible 
through attributes.