[R6RS] Distinct S-expression in `case'

dyb at cs.indiana.edu dyb at cs.indiana.edu
Fri Aug 18 10:06:58 EDT 2006

> Do we require a check and exception with condition type &syntax for
> duplicate case constants at expansion time?

No.  The restriction preventing duplicate case constants is fine for
hand-written code, but it's undesirable for machine-generated code.  In
fact, I prefer we adopt a left-to-right processing order for case and
allow duplicate datums.  This change wouldn't break any R5RS-compliant


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