character-properties

I would like to use a regular expression like this in Java : [[=a=][=e=][=i=]] . But Java doesn't support the POSIX classes [=a=], [=e=] etc . How can I do this? More precisely, is there a way to not use US-ASCII? Java does support posix character classes . The syntax is just different, for instance: \p{Lower} \p{Upper} \p{ASCII} \p{Alpha} \p{Digit} \p{Alnum} \p{Punct} \p{Graph} \p{Print} \p{Blank} \p{Cntrl} \p{XDigit} \p{Space} Quoting from http://download.oracle.com/javase/1.6.0/docs/api/java/util/regex/Pattern.html POSIX character classes (US-ASCII only) \p{Lower} A lower-case alphabetic

Without looping over the entire range of Unicode characters, how can I get a list of characters that have a given property? In particular I want a list of all characters that are digits (i.e. those that match /\d/ ). I have looked at Unicode::UCD , and it is useful for determining the properties of a given character, but there doesn't seem to be a way to get a list characters that have a property out of it. The list of Unicode characters for each class is generated from the Unicode spec when you compile Perl, and is typically stored in /usr/lib/perl-YOURPERLVERSION/unicore/lib/gc_sc/ For

I'm matching identifiers, but now I have a problem: my identifiers are allowed to contain unicode characters. Therefore the old way to do things is not enough: t_IDENTIFIER = r"[A-Za-z](\\.|[A-Za-z_0-9])*" In my markup language parser I match unicode characters by allowing all the characters except those I explicitly use, because my markup language only has two or three of characters I need to escape that way. How do I match all unicode characters with python regexs and ply? Also is this a good idea at all? I'd want to let people use identifiers like Ω » « ° foo² väli π as an identifiers