The following regex should match any document that IS NOT a pdf file:

  .*[.](?!pdf$).*$

This regex should match:

     Mynotes.doc

It should fail on:

    Myinfo.pdf

However, the above regex returns true on both using boost 1.33.0.

But positive lookahead works fine:

  .*[.](?=pdf$).*$

Above regex correctly matches only documents ending in .pdf .

Can anyone confirm this is a bug?

Thanks,

-Rob