+ ((defined __cplusplus && 201103 <= __cplusplus) \
+ || (defined __APPLE__ && defined __MACH__ \
+ ? 4 < __GNUC__ + (1 <= __GNUC_MINOR__) \
+ : __GNUC__) \
+ || __HP_cc || __HP_aCC || __IBMC__ || __IBMCPP__ \
+ || __ICC || 0x5110 <= __SUNPRO_C \
+ || 1300 <= _MSC_VER)