Xcode 4.5 Custom formatters (summary formatter)

[Dadok]

Does anyone have any good information regarding how to add custom formatters for QString, QList, etc in XCode 4.5? I've tried the following 2, the first which gives me a "Summary unavailable" and the second which causes xcode to crash:

{$VAR.latin1()}:s
{(const char *)$VAR.toUtf8().constData()}:s

This seems like something that shouldn't be hard to find on google, but I've had no luck, and spent quite some time.

Thanks!