template struct Outputter; #if defined(_MSC_VER) && defined(_MSVC_LANG) #define CXX_STD _MSVC_LANG #else #define CXX_STD __cplusplus #endif #if DEFAULT_CXX17 #if CXX_STD <= 201402L Outputter o; #endif #elif DEFAULT_CXX14 #if CXX_STD != 201402L Outputter o; #endif #elif DEFAULT_CXX11 #if CXX_STD != 201103L Outputter o; #endif #else #if !DEFAULT_CXX98 #error Buildsystem error #endif #if CXX_STD != 199711L && CXX_STD != 1 && !defined(__GXX_EXPERIMENTAL_CXX0X__) Outputter o; #endif #endif int main() { return 0; }