class IEnemyState {
    public:
        static void apply() {};// = 0;
};

class IdleState : public IEnemyState {
    public:
        static void apply() {
            printf("idle state. !!!!!!!!!!!!!!\n");
        }
};

class FooState : public IEnemyState {
    public:
        static void apply() {
            printf("foo state. !!!!!!!!!!!!!!\n");
        }
};

class EnemyStates {
    public:
         static IdleState Idle;
         static FooState Foo;
};

// Instead of a class, we just stick 'em in a namespace.
namespace Bar {
    IdleState* Idle = new IdleState();
    FooState* Foo = new FooState();
}