To comment on the following update, log in, then open the issue: http://www.openoffice.org/issues/show_bug.cgi?id=85269 Issue #|85269 Summary|Regular expressions should use standard syntax for nam |ed class Component|framework Version|OOo 2.3.1 Platform|All URL| OS/Version|All Status|UNCONFIRMED Status whiteboard| Keywords| Resolution| Issue type|DEFECT Priority|P3 Subcomponent|ui Assigned to|tm Reported by|jes
------- Additional comments from [EMAIL PROTECTED] Tue Jan 15 16:55:26 +0000 2008 ------- [This is a split from issue 64368] OOo supports named character classes in regular expressions, e.g. "[:space:]" for any character from the class "white space". However, the syntax supported by OOo does not conform to the POSIX standard, which specifies that the named classes are only valid within a character class[1]. To use the named white space class within a regular expression, you have to write it as "[[:space:]]". OOo instead does exactly the opposite: the named classes are only recognized if they are used outside a regular character class. This leads to confusion when a user is familiar with standard regexp syntax, or when external regexp documentation is consulted. OOo's behavior is unique--unlike any other regular expression implementation. It also leads to loss of functionality in the regular expression language. E.g., there is no way in OOo to express a negated named class. In standard POSIX syntax, you can write "[^[:space:]]". Further, some patterns are more difficult to write and debug. In standard POSIX syntax, the character class "white space or period" can be expressed using a straightforward class: "[[:space:].]". In OOo, you have to use the more complex alternative syntax: "([:space:]|\.)" I first raised this problem in the context of issue 64368, but it seems clear that it should exist as a separate issue, since it is a distinct problem and any discussion of it distracts from the other. However, this issue encloses the other (does it make sense to fix matching errors when the syntax is wrong?), so perhaps this one should be added as blocking the other, or as a dependency; I'm not sure what the policy is, so I leave that to someone else. [1] Open Group "Base Definitions" Chapter 9, section 9.3.5 RE Bracket Expression: http://www.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap09.html#tag_09_03_05 --------------------------------------------------------------------- Please do not reply to this automatically generated notification from Issue Tracker. Please log onto the website and enter your comments. http://qa.openoffice.org/issue_handling/project_issues.html#notification --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
