Dave Trombley <dtrom@bumba.net> writes:
> Is it correct of me to assume that the concrete storage of a user
> defined type, defined in C, must not contain any references to
> structures allocated per-object?
The concrete storage has to be a flat chunk of memory --- no pointers,
nothing that can't survive being moved around. You don't get to control
moving, copying, or deleting.
regards, tom lane