Re: [Scheme-reports] digit-value
Marc Feeley
(01 Jul 2012 12:55 UTC)
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Re: [Scheme-reports] digit-value
Alex Shinn
(01 Jul 2012 20:28 UTC)
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Re: [Scheme-reports] digit-value
Marc Feeley
(02 Jul 2012 12:08 UTC)
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Re: [Scheme-reports] digit-value
Alaric Snell-Pym
(02 Jul 2012 12:21 UTC)
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Re: [Scheme-reports] digit-value
John Cowan
(03 Jul 2012 07:16 UTC)
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Re: [Scheme-reports] digit-value
Alaric Snell-Pym
(03 Jul 2012 08:50 UTC)
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Re: [Scheme-reports] digit-value
Pierpaolo Bernardi
(03 Jul 2012 09:11 UTC)
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Re: [Scheme-reports] digit-value
John Cowan
(03 Jul 2012 14:45 UTC)
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Re: [Scheme-reports] digit-value
Pierpaolo Bernardi
(03 Jul 2012 15:58 UTC)
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Re: [Scheme-reports] digit-value
John Cowan
(04 Jul 2012 04:22 UTC)
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(missing)
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Re: [Scheme-reports] digit-value
John Cowan
(05 Jul 2012 02:25 UTC)
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Re: [Scheme-reports] digit-value John Cowan (03 Jul 2012 03:19 UTC)
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Marc Feeley scripsit: > Your arguments suggest to me that string->number should be extended to > Unicode (if that's supported by the implementation), and digit-value > dropped from the standard. Once more, where do we stop? If `string->number` gets support, why not `read`? If `read` gets support, why not numeric literals? No programming language I know of, indeed no implementation I know of, goes so far as to support non-European digits in its numeric literals. That's going well beyond anything we have precedent for. The WG needed to redefine `char-numeric?` because the R6RS definition, while basically sound, referred to a Unicode character class "Numeric" that doesn't exist, and nobody noticed, not even me. :-) The WG settled that it returns `#t` on Unicode's decimal digits only. Given that, it makes sense to be able to ask for the value of those decimal digits as well. That is already going where no Scheme has gone before, something the WG has tried to avoid. -- John Cowan <cowan@ccil.org> http://www.ccil.org/~cowan One time I called in to the central system and started working on a big thick 'sed' and 'awk' heavy duty data bashing script. One of the geologists came by, looked over my shoulder and said 'Oh, that happens to me too. Try hanging up and phoning in again.' --Beverly Erlebacher _______________________________________________ Scheme-reports mailing list Scheme-reports@scheme-reports.org http://lists.scheme-reports.org/cgi-bin/mailman/listinfo/scheme-reports