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A different approach Thomas Lord (18 Jul 2005 17:45 UTC)
Re: A different approach felix winkelmann (19 Jul 2005 08:19 UTC)
Re: A different approach Jens Axel Søgaard (19 Jul 2005 08:29 UTC)
Re: A different approach felix winkelmann (19 Jul 2005 08:39 UTC)
Re: A different approach Jens Axel Søgaard (19 Jul 2005 08:46 UTC)
Re: A different approach felix winkelmann (20 Jul 2005 07:25 UTC)
Re: A different approach Jens Axel Søgaard (20 Jul 2005 10:07 UTC)

Re: A different approach Jens Axel Søgaard 19 Jul 2005 08:26 UTC

felix winkelmann wrote:
> On 7/18/05, Thomas Lord <xxxxxx@emf.net> wrote:
>>
>>     It has never been great style in Scheme, even if strictly portable, to
>>write programs which assume that string->symbol and symbol->string define a
>>1:1 relationship between the two types.
>
> I'm probably missing something obvious, but this strikes me as quite
> nonsensical.
> Could you elaborate?

The culprit is uninterned symbols:

 > (let ((foo 'foo))
     (eq? (string->symbol (symbol->string foo))
       foo))
#t

 >(let ((foo (string->uninterned-symbol "foo")))
   (eq? (string->symbol (symbol->string foo))
     foo))
#f

--
Jens Axel Søgaard