Code-points are the new ASCII.
-t
Shiro Kawai wrote:
> From: "Arthur A. Gleckler" <arthur_at_zurich.csail.mit.edu>
> Subject: Re: [r6rs-discuss] [Formal] Scheme should not be changed to be case sensitive.
> Date: Tue, 14 Nov 2006 11:18:17 -0800
>
>
>>>> Does this mean that (eq? 'symbol 'SYMBOL) ==> #f ?
>>>>
>>> Yes - that is the whole point.
>>>
>> Of course. I was just checking to make sure that I understood. This
>> change was added to the report with no rationale paragraph or any
>> other explanation. It will require changing a lot of existing code.
>>
>
> I understand backward compatibility isn't the first priority of R6RS.
>
> BTW, if you stick with case insensitivity, how do you handle cases
> like this?
>
> (eq? '$B&2(B '$B&R(B) => #t ;; U+03A3 (capital sigma) vs U+03C3 (small sigma)
> (eq? '$B&2(B '?) => #t ;; U+03A3 (capital sigma) vs U+03C2 (small final sigma)
>
> (eq? '$B&R(B '?) => ? ;; U+03C3 (small sigma) vs U+03C2 (small final sigma)
>
>
>> Adding a syntax for interning case-sensitively, e.g. something like #|
>> MixedCase|, and perhaps changing string->symbol to preserve case,
>> should be enough to make the XML and foreign-function-interface uses
>> you mention easy and convenient to implement without requiring a
>> large change to Scheme.
>>
>
> I think string->symbol is already case-preserving in R5RS.
> Here's a relevant discussion:
> http://okmij.org/ftp/Scheme/SXML.html#Case-sensitivity%20of%20SXML%20names
>
> --shiro
>
>
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>
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Received on Tue Nov 14 2006 - 14:48:12 UTC