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c++templatesinheritance
Chum-Chum Scarecrows
Chum-Chum Scarecrows

Reputation: 539

Inheriting an Abstract Template Class in C++ while specifying the type

Say I have a template, abstract class:

template <class T>
class MyClass {
public:
    virtual bool foo(const T a, const T b) = 0;
}

And another class that wants to inherit, while getting rid of the template:

class MyInheritor : public MyClass<int *> {
public:
    bool foo(const int* a, const int* b) { /* stuff */ }
}

The above doesn't let me instantiate MyInheritor, saying it's an abstract class. How can I override the pure virtual method?

Upvotes: 2

Views: 76

Answers (1)

Hiura
Hiura

Reputation: 3530

Because you are not overriding anything here: the const is applied to the int and not to the pointer to int.

Here is the fixed version you probably want:

class MyInheritorFixed : public MyClass<int *> {
    bool foo(int* const a, int* const b) override { return true; }
};

Live

Upvotes: 4

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