Hi, do we have any rules on the C++ standard used in Plasma? Most Plasma repos don't specify a CMAKE_CXX_STANDARD , defaulting to 11 through ECM. Some, such as kwin set it to 14.
I found myself a few times in the situation where a C++17 feature would have been useful, but it always felt like requiring 17 just for this particular case wouldn't be justifiable. I do however believe that if you sum up all these minor occasions it becomes significant. I therefore propose to formalize that using C++17 in Plasma is acceptable. Several KDE projects already require C++17 (keysmith, kio-fuse, kio-extras, maui, kaidan, itinerary, sink, elisa, akonadi and kactivitymanagerd). Given that kactivitymanagerd is technically part of Plasma we even have precedence of using C++17 in Plasma. Qt6 will require C++17 too. With regards to compiler compatibility: gcc supports C++17 since version 5, Neon bionic, which is about as old a distro as I would reasonably expect Plasma to support, ships gcc 7, so I don't expect any issues here. Thoughts? Cheers Nico
