Hi Matt - thanks for the pointer, I will give it a shot. Thanks, yinso <div>On 4/22/07, Matthew Flatt <<a href="mailto:mflatt@cs.utah.edu">mflatt@cs.utah.edu </a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">At Sun, 22 Apr 2007 03:32:36 -0700, "Yin-So Chen" wrote: > My motivation for having a conditional define is to make it > play nice with the module system, which doesn't work well when having > multiple definitions with the same name.  I was hoping there is an > "automated" way of detecting whether a symbol is already defined in the > current module, if so, either override or not import the definition. Within a module, `identifier-binding' should do the trick. Matthew </blockquote></div> -- <a href="http://www.yinsochen.com">http://www.yinsochen.com</a> ...continuous learning...