On 1/16/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
I need to use regular expressions with a sequence of characters as a collating element. From re_format(7): "Within a bracket expression, a collating element (a character, a multi- character sequence that collates as if it were a single character, or a collating-sequence name for either) enclosed in `[.' and `.]' stands for the sequence of characters of that collating element. The sequence is a single element of the bracket expression's list. A bracket expression containing a multi-character collating element can thus match more than one character, e.g. if the collating sequence includes a `ch' collating element, then the RE `[[.ch.]]*c' matches the first five characters of `chchcc'." But grep (and other programs using regexp) writes on "echo somepattern | grep -Ee 'some[^[.pattern.]]'": "Invalid collation character". What's wrong?
After some searching around I found the following post (albeit for a different project): http://permalink.gmane.org/gmane.comp.gnu.utils.bugs/11462 An excerpt: " I have to admit to having no experience with collating characters. That said, I'll convey my understanding of them. You cannot use [. and .] to group an arbitrary pair of characters together. Collating characters are defined by the locale in which you're running, and only those defined by the locale are available for use inside [. and .]. They usually have names, defined by the locale; the name may or may not be the actual sequence of characters, such [as] '[.ch.].' " I'm not sure, myself, but I hope that helps and isn't far from the truth ;) If anyone knows otherwise, please let me know. Is there a certain match you are trying to pattern? From the looks of it, [ch]* would match a similar set of characters, but it isn't as strict about which pattern they should be in. Sincerely, -Parker _______________________________________________ email@example.com mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"