C++20 added dot initialization, which has been supported in MSVC/GCC/Clang for over a year now. No released version of the C++ standard supports array index ini

C++20 added dot initialization, which has been supported in MSVC/GCC/Clang for over a year now. No released version of the C++ standard supports array index initialization, and jcelerier says Clang but not GCC supports it as an extension.