Question

I’ve got following regex which seems to be a valid regex according to regex coach but qt’s regexp.isValid says something else. Could anyone tell me what’s the story with this expression:

^[^,\.:;\*<>\[\]\+\"\\\/]+\.cpp$

Answer 1

According to http://doc.qt.nokia.com/latest/qregexp.html Qt/C++ needs double escaping, so try to double each backslash like this:

^[^,.:;*<>[\\]+"\\\\/]+\\.cpp$

I removed also some of them, because inside a character class they don’t need to be escaped.