[Development] Out of line move constructors

Giuseppe D'Angelo giuseppe.dangelo at kdab.com
Tue Sep 15 01:16:04 CEST 2020

Il 14/09/20 23:48, Thiago Macieira ha scritto:
> It's not inline, it's because you didn't define it.
> To use the extern in the header, you need to add the definition to the .cpp,
> after the Private class was defined. That effectively means repeating the body
> of the destructor we extern'ed. So we'd probably need a macro to ensure that.

As commented on the patch, this part of the story that eventually led to 
the design of QIntrusiveSharedDataPointer -- the previous incantations 
featured macros and the like, and the commit message talked about 
trouble in the presence of exported symbols, but I'm not sure what it 
was referring to. Does anyone remember? If it's no longer an issue, is 
pinning the smart pointer dtor the way we want to go? How to make it 
into a public API so that it's not just a Qt-specific trick? (After all, 
the smart pointers in question have public APIs)

Giuseppe D'Angelo | giuseppe.dangelo at kdab.com | Senior Software Engineer
KDAB (France) S.A.S., a KDAB Group company
Tel. France +33 (0)4 90 84 08 53, http://www.kdab.com
KDAB - The Qt, C++ and OpenGL Experts

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