CAtlRegExp格式的正则表达式不起作用？

Question

I created a regular expression to capture Microsoft Office executables like so:

 .*(\\Microsoft Office\\Office)(\d){1,2}(\\)(WINWORD.EXE|EXCEL.EXE|POWERPNT.EXE|MSACCESS.EXE|OUTLOOK.EXE|VISIO.EXE|WINPROJ.EXE)$

Anyway it turns out that the software I'm using only supports the CAtlRegExp flavour of regular expressions, and the above does not work.

I'm looking at the following article for reference and using the tool to test my regular expression: https://www.codeproject.com/Articles/13320/Using-Regular-Expressions-in-MFC

An example path is:

C:\\Program Files (x86)\\Microsoft Office\\Office14\\WINWORD.EXE

Can anybody assist?

Thanks.

Answer 1

It looks like you may use

.*\\Microsoft Office\\Office\d\d?\\((WINWORD)|(EXCEL)|(POWERPNT)|(MSACCESS)|(OUTLOOK)|(VISIO)|(WINPROJ))\.EXE$

The point here is that all alternatives inside (...) must be also wrapped with parentheses and that the regex flavor does not support limited (interval) quantifiers, and {...} defines a capturing group with zero-based IDs. \\d\\d? matches 1 or 2 digits. See the docs you refer to :

You can note that the syntax is not exactly the same as in Perl. For example, the grouping operator is {}, while in Perl it is (), and it doesn't have the {n} (match exactly n times) as in the Perl syntax

Also note that a literal dot should be defined with \\. and it is a good idea to only use one \\.EXE after all the grouped alternatives.