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[plt-scheme] peek/read in PLT Scheme

From: Arjun Guha (guhaarju at grinnell.edu)
Date: Mon May 9 17:07:19 EDT 2005		 
Hello,

Is there a procedure in PLT Scheme that reads Scheme expressions from  
an input port, but does not move ahead to the next expression (i.e. a  
peek operation)?

Thanks.

-Arjun
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