forward references in typedefs (puzzling)

[Doug Gwyn]

In article <11341 at cit-vax.Caltech.Edu> wen-king at cit-vax.UUCP (Wen-King Su) writes:
-I have often wondered about this.  Is it legal?  Since pointers for
-different data objects are not required to have the same binary format
-or even storage size, how would a compiler allocate space and initialize
-a pointer of an unknown type?

All pointers-to-structures have the same size, that's how.