<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <META content="MSHTML 6.00.2800.1106" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>Hi there,</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>I am trying to compare two instances of a simple structure for value equality. Thus:</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>(define-struct location (x y))</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>(equal? (make-location 0 0) (make-location 0 0))</FONT></DIV> <DIV><FONT face=Arial size=2>#f</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>(eq? (make-location 0 0) (make-location 0 0))</FONT></DIV> <DIV><FONT face=Arial size=2>#f</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>(eqv? (make-location 0 0) (make-location 0 0))</FONT></DIV> <DIV><FONT face=Arial size=2>#f</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>I have searched the PLT docs and was led to believe that equal? should just work. Any  ideas?</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Thanks in advance,</FONT></DIV> <DIV><FONT face=Arial size=2>-pp</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV></BODY></HTML>