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felix winkelmann wrote:
Uninterned symbols are (currently) not provided by standard Scheme, and can be simulated by some magic prefix in portable code.
Nevertheless, the section eqv? has the following note on symbols: The eqv? procedure returns #t if: * obj1 and obj2 are both symbols and (string=? (symbol->string obj1) (symbol->string obj2)) ===> #t Note: This assumes that neither obj1 nor obj2 is an ``uninterned symbol'' as alluded to in section 6.3.3. This report does not presume to specify the behavior of eqv? on implementation-dependent extensions. Since some implementation do have uninterned symbols, it implies that it isn't great style to rely on the above. -- Jens Axel Søgaard