Item2028: Character classes in regex SEARCH broken

The regex syntax for %SEARCH% is not implemented properly. I found at least two character classes which don't work as expected: \w and \s.

The example below illustrates the problem. The twi lines of text define the search target. The first search uses [a-z]+ and works as expected. The second search uses [\w]+ which should find the same but fails. In the third example, the white-space in the regex is written as a literal (" ") which works. If the white-space in the regex is replaced by \s, the search fails (4th search).

Under TWiki 4.1.2 all of these examples work as expected.

Search Target

footextbar

spam and some more text

1st Search

Results from Tasks web retrieved at 04:50 (GMT)

2nd Search

Results from Tasks web retrieved at 04:50 (GMT)

3rd Search

Results from Tasks web retrieved at 04:50 (GMT)

4th Search

Results from Tasks web retrieved at 04:50 (GMT)

-- MartinKaufmann

confirmed (painfully) that \s and such don't work. not confirmed in the sense that i don't know it was ever spec'ed to wok... :/ confirming, but changing to an enhancement until/unless there's documentation to point at saying this is supposed to work or was ever implemented.

-- WillNorris - 15 Feb 2010

I haven't come across any documentation either. I can only show some screenshots taken on my old TWiki® 4.1.2 installation.

• Character class \s:
  
• Character class \w:
  

-- MartinKaufmann - 15 Feb 2010