I notice new C++ 23 features such as the multi subscript operator overload mentioned in Xcode beta release notes, but I don’t see a way to enable C++ 23 in the build flags. What is the correct flag, or is C++ 23 unusable in Apple Clang?
Enable C++23 features in latest Xcode beta
The flag will be something like --std=c++23 - maybe it's just not exposed in the build settings GUI? Let us know if you can get it to work, I've not tried it.