Sure, I was just giving my opinion. Take it for what it's worth... :-)

But if you'll indulge me for a moment, consider how you'd convert a string to uppercase using the STL vs using Qt. The STL code (taken from http://en.cppreference.com/w/cpp/algorithm/transform) looks like this:

   std::string tmp = s;
   std::transform(tmp.begin(), tmp.end(), tmp.begin(), std::ptr_fun<int, int>(std::toupper));
   return tmp;

Note the use of a temporary variable, because std::transform does a destructive update.

The equivalent Qt code looks like:

   return s.toUpper();

I'll let you draw your own conclusions.

By the way if there's a simpler way to do that using the STL, I'd love to hear about it.