It would be interesting to make a version of the VAX compilers that map NIL pointers to 0x80000000 (or 0xffffffff). Whee! -- (This mind accidently left blank.) In-Real-Life: Chris Torek, Univ of MD Comp Sci (301) 454-7690 UUCP: {seismo,allegra,brl-bmd}!umcp-cs!chris CSNet: chris at umcp-cs ARPA: chris at maryland