Wt

I was trying to control regex options being used (e.g., std::regex_constants::syntax_option_type) to allow controlling if case is ignored.

However, in looking over the WRegExpValidator class there look to maybe be a few other issues: the member variable pattern_ is not set when you construct the class with a WString (only regex_ is), and the std::regex constructor also doesn't look to be implemented.

Since allowing library users to set the std::regex (either via the constructor or a setter) would also have the issue that all the options would need to be mirrored in the JavaScript (ex. if std::regex_constants::egrep is chosen), it might make sense to only allow setting the pattern via string, and instead add a member function to control setting case sensitivity (or any other options there may be).

Thank you.

That other issue you're referring to (pattern_ not being set) should already be fixed in master.

Other than that, we could indeed for the setting of certain options. That was actually already the case for Wt 3, where it was possible to do a case insensitive match, so I guess we should add that back in.