Wtf.cpp

struct Config { blabla };
typedef int ConfigType;
enum ConfigType_ { Type1, Type2, Type3, TypeCOUNT; };

auto SetConfig(ConfigType type, Config config) -> void {
 switch (type) {
  case Type1: blablba; break;
  case Type2: blablba; break;
  case Type3: blablba; break;
  default: error(); break;
 }
}