My second reply to you was: >An inline function that depends on RTTI will fail to compile when -fno-rtti is enabled. Note that you completely ignored that poi

My second reply to you was: >An inline function that depends on RTTI will fail to compile when -fno-rtti is enabled. Note that you completely ignored that point. >You will only have fun unexpected behaviors on some compilers. I made it very clear, as did OP, that we were discussing the use of -fno-rtti. There is not a single compiler where that flag does not behave the way as I described. You are discussing MSVC which does not have an -fno-rtti but instead uses a /GR- which behaves differently from -fno-rtti. When discussing detailed matters involving C++ compilers and toolchains, precision matters. Especially since clang has a compatibility mode with MSVC where it too implements both /GR- and -fno-rtti and treats them as separate flags with different behaviors.