On Mar 17, 2012, at 11:58 , Erik Corry wrote: > 2012/3/17 Steven L. <[email protected]>: >> I further objected because I think the /u flag would be better used as a >> ASCII/Unicode mode switcher for \d\w\b. My proposal for this is based on >> Python's re.UNICODE or (?u) flag, which does the same thing except that it >> also covers \s (which is already Unicode-based in ES). > > I am rather skeptical about treating \d like this. I think "any digit > including rods and roman characters but not decimal points/commas" > http://en.wikipedia.org/wiki/Numerals_in_Unicode#Counting-rod_numerals > would be needed much less often than the digits 0-9, so I think > hijacking \d for this case is poor use of name space. The \d escape > in perl does not cover other Unicode numerals, and even with the > [:name:] syntax there appears to be no way to get the Unicode > numerals: > http://search.cpan.org/~flora/perl-5.14.2/pod/perlrecharclass.pod#POSIX_Character_Classes > This suggests to me that it's not very useful.
Looking at that page, it seems \d gives you a reasonable set of digits, the ones in the Unicode general category Nd (number, decimal). These digits come from a variety of writing systems, but are all used decimal-positional, so you can parse at least integers using them with a fairly generic algorithm. Dealing with roman numerals or counting rods requires specialized algorithms, so you probably don't want to find them in this bucket. Norbert _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
