Il 19/07/20 12:51, Oswald Buddenhagen ha scritto:
- the compiler somehow starts to actually make use of the freedom
granted by the fact that QObject is not standard-layout (this, btw, is
also the reason why peppe's suggestion to use offsetof doesn't fix
UB).
offsetof is conditionally-supported for non standard layout classes in C++17.:
http://eel.is/c++draft/support.types.layout#1.sentence-2
I haven't found any note in GCC/Clang/MSVC docs saying that they won't support it in this case, hence it's supported.
http://eel.is/c++draft/intro.compliance#:behavior,conditionally-supported
My 2 c, -- Giuseppe D'Angelo | giuseppe.dang...@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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