[gclist] Re: weak pointer and gc

[Ji-Yong D. Chung]

Hi
>     [you wrote] If pointer-tag is -1, then object type is unconstrained;
>     otherwise, the object type is constrained to have a pointer
>     tag that matches pointer-tag....

    Here, what types of pointer tags could one have?  In my
scheme implementation, I just have one pointer type.