CODEWITHSUNDEEP
c++templatesinheritance
Cashif Ilyas
Cashif Ilyas

Reputation: 1705

Can I refer to the template's base class?

Is there a way to refer to the base class of the currently provided template? For example,

template <class UserType>
class User
{
    public:
        User()
        {
            user_manager_ = std::make_unique<UserType>();
        }

   private:
        std::unique_ptr<UserType::Base> user_manager_; // <-- I want this ptr to be the type of base of UserType i.e. IUserManager
}

Upvotes: 0

Views: 189

Answers (1)

Equod
Equod

Reputation: 556

Nope, because of multiple inheritances in c++. The only way to do something similar is:

struct A {};

struct UserType : public A {
  using Base = A;
};

template<class UserType>
class User {
 public:
  User() {
    user_manager_ = std::make_unique<UserType>();
  }

 private:
  std::unique_ptr<typename UserType::Base> user_manager_; // <-- I want this ptr to be the type of base of UserType i.e. IUserManager
};

Upvotes: 1

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