Partial Tiled 1.8 Support

[Karamu98]

• Properties of the type "class" can now be parsed, a reference to the users "propertytype" is now also stored if set
• "class" type properties now recursively load child properties

This partially implements this change log.
I threw this together pretty quick but I'm happy to make changes if this isn't good enough right now, I'm not a fan of the recursive vectors for example but it got the job done for me!

[fallahn]

Thanks! I'll have a good look ASAP

[Karamu98]

Is this just a missing include for linux? I can pop that at the top of the file with a problem or is there a better place? Sorry never built for linux before!

[fallahn]

Yeah - looks like it's just missing the #include <memory> - not uncommon for different platforms. In fact I'm surprised it's not missing on mac too (it can be quite fussy). I usually keep a VM handy for this sort of thing, but if you prefer to update and push to your fork the CI should automatically kick in and re-run the checks.

[fallahn]

Looking more closely, I wonder if the shared_ptr is even needed? m_classValue should work just as well as a std::vector<Property> , I think. Perhaps if there is a clear need for there to be only a single instance of a class member then it would make sense (although even then probably fine to use references to a unique_ptr) - but as copying a Property copies all the other possible types it could contain, then I don't see why copying its class type member would be a problem. If you see what I mean?

[Karamu98]

That's a good point, I reactively threw it onto the heap but that really isn't needed here! I'll get that changed:)

[fallahn]

Nice work - thanks! 😁