> My head hurts, so I'm not sure this is strictly legit C (drop-in replacement
> for the current PyGC_Head declaration):
>
> /* GC information is stored BEFORE the object structure */
> typedef union _gc_head {
> struct {
> union _gc_head *gc_next; /* not NULL if object is tracked */
> union _gc_head *gc_prev;
> int gc_refs;
> };
> double dummy; /* force worst-case alignment */
> } PyGC_Head;
Alas, gcc gives me warnings about this:
../Include/objimpl.h:274: warning: unnamed struct/union that defines no instances
and references to the fields fail with errors:
../Objects/cellobject.c: In function `PyCell_New':
../Objects/cellobject.c:14: union has no member named `gc_next'
[and many more]
--Guido van Rossum (home page: http://www.python.org/~guido/)
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