Re: defobj follow up/ Reflective objects

[Marcus G. Daniels]

>>>>> "PJ" == Paul E Johnson <address@hidden> writes:

PJ> Looking at the -lispOutShallow: method in DefClass.m, I don't
PJ> understand why this will not work.

PJ>    struct objc_ivar_list *ivars = ((Class_s *) self)->ivarList;
PJ>    unsigned count = ivars->ivar_count;
PJ>    printf ("ivar count %d ", count);

One reason this might break would be if `self' was a normal object
and not a class object.  (The first ivar of an instance is the the
class object.)

This kind of mapping over instance variables is done in an language
independent way by using the map_object_ivars routine in defobj/internal.m.

I don't suggest you use that, though.  The intended public interface
for casually reading and writing ivar values is VarProbe.  For
preserving object state, the intended interfaces are {Lisp,HDF5}Archiver.


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