CODEWITHSUNDEEP
c++oop
Rick
Rick

Reputation: 451

Template Based Class Variable

I'm working on a game and I want to make a base Actor class that holds Stat values that are shared among a variety of Actor types, but I'm having an issue understanding how I can accomplish this without having the base class having a different Stats variable than the actor types...

This is exactly what I have made right now (as shown in the code)... However, I want to somehow make the BaseActor "stats" type become either a PlayerStats or a MonsterStats object when it is created...This way the PlayerActor and MonsterActor no longer need the different "monster_stats" and "player_stats" objects as they inherit the correct type from BaseActor. Is this possible? I'm thinking it can be done through templates, but I'm not too versed in those.

class BaseStats {
public:
   int defense;

private:
};

class MonsterStats : public BaseStats {
public:
   int drop_rate;
private:
};

class PlayerStats : public BaseStats {
public:
   int attack_power;
private:
};

class BaseActor {
public:
   BaseStats stats;

private:
};

class MonsterActor : public BaseActor {
public:
   MonsterStats monster_stats;

private:
};

class PlayerActor : public BaseActor {
public:
   PlayerStats player_stats;

private:
};

Upvotes: 0

Views: 50

Answers (2)

EReload
EReload

Reputation: 249

Look for Jeffrey's answer for a better way. But since you wanted to do this through templates (which is not recommended): -

template <typename T>
class BaseActor {
public:
   T stats;
};

class MonsterActor : public BaseActor<MonsterStatus> {
public:

};

class PlayerActor : public BaseActor<PlayerStatus> {
public:

};

Upvotes: 0

Jeffrey
Jeffrey

Reputation: 11400

Have PlayerStats and MonsterStats derive from BaseStats. Have the constructor of each derived BaseActor allocate the stats with:

MonsterActor::MonsterActor()
{
    m_stats = make_shared<MonsterStats>();
}

and have

std::shared_ptr<BaseStats> m_stats;

in the base class.

Upvotes: 2

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