<!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 6.00.6000.16414" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV>; Be assured that I am very pleased with the tools like Macro Stepper and Check Syntax in DrScheme, but there is a tiny thing I do not understand:</DIV> <DIV> </DIV> <DIV>; DrScheme, version 369.9-svn13apr2007 [3m].<BR>; Language: Textual (MzScheme, includes R5RS).</DIV> <DIV> </DIV> <DIV>(define-syntax a<BR> (syntax-rules ()<BR>  ((a b)           ; *<BR>   (list b b b)))) ; **</DIV> <DIV> </DIV> <DIV>; When checking syntax I observe:</DIV> <DIV>; * b highlighted as lexical var.<BR>; ** first b highlighted as lexical var, second and third as symbols.<BR>; An arrow is shown between the two occurrences of b that are highlighted as lexical vars.<BR>; No arrows are shown from or to the occurrences of b that are highlighted as symbols.</DIV> <DIV>; Same observations with syntax-case.</DIV> <DIV> </DIV> <DIV>; Is there a reason for this, is this a bug or am I simply being ignorant?<BR>; Best wishes, Jos koot</DIV> <DIV> </DIV> <DIV>(((((lambda(x)((((((((x x)x)x)x)x)x)x)x))<BR>    (lambda(x)(lambda(y)(x(x y)))))<BR>   (lambda(x)(x)x))<BR>  (lambda()(printf "Greetings, Jos~n"))))</DIV></BODY></HTML>