[Interest] Finally about extends my app function ability

[André Somers]

>     I can´t found an explanation of the differences of
>     /reinterpret_cast/ and /dynamic_cast/, because I can´t found
>     information about /reinterpret_cast/ in Qt Documentation (5.5.0 Qt
>     version).
>
>
> You will probably find that Qt doesn't have much to say about them 
> because they are part of the C++ language.
>
> http://en.cppreference.com/w/cpp/language/dynamic_cast
> http://en.cppreference.com/w/cpp/language/reinterpret_cast
>
> ...and, since you're looking at casting, you should probably know 
> about const_cast and static_cast as well:
>
> http://en.cppreference.com/w/cpp/language/const_cast
> http://en.cppreference.com/w/cpp/language/static_cast
>
Also have a look then at the cast operator that Qt _does_ provide: 
qobject_cast: http://doc.qt.io/qt-5/qobject.html#qobject_cast

André
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