Asmus Freytag wrote:
On 7/25/2010 6:05 PM, Martin J. Dürst wrote:
On 2010/07/26 4:37, Asmus Freytag wrote:
PPS: a very hypothetical tough case would be a script where letters
serve both as letters and as decimal place-value digits, and with modern
living practice.
Well, there actually is such a script, namely Han. The digits (一、
二、三、四、五、六、七、八、九、〇) are used both as letters and as
decimal place-value digits, and they are scattered widely, and of
course there are is a lot of modern living practice.
Martin,
you found the hidden clue and solved it, first prize :)
They do not show up as gc=Nd, nor as numeric types Digit or Decimal.
The situation is worse than you indicate, because the same characters
are also used as elements in a system that doesn't use place-value, but
uses special characters to show powers of 10.
Is it the case that a sequence of just these characters, without any
intervening characters, and not adjacent to the special characters you
mention always mean a place-value decimal number?
However, as I indicated in my original post, in situations like that,
there are usually some changes in practice that took place. Much of the
living modern practice in these countries involves ASCII digits. While
the ideographic numbers are definitely still used in certain contexts,
I've not seen them in input fields and would frankly doubt that they
exist there. I would fully expect that they are supported as number
format for output, at least in some implementations, and, of course,
that input methods convert ASCII digits into them. In other words, I
wonder whether automatic conversion goes only one-way for these numbers.
I would suspect it, for the general case, but I don't actually know for
sure.
For someone in Karl's situation, it would be interesting to learn
whether and to what extent he should bother supporting these numbers in
his language extension.
A./
