Question

I can have a typedef function pointer in a class like this:

template<typename T>
class MyClass
{

public:

typedef T (*fptr)(T);

  void doSomething(fptr my_fptr) { /*...*/ }

};

and this works fine. but if I inherit from such a class, as below:

template<typename T>
class MyClass
{

public:

typedef T (*fptr)(T);

  virtual void doSomething(fptr my_fptr) = 0;

};

template<typename T>
class MyOtherClass: public MyClass<T>
{

public:

  void doSomething(fptr my_fptr) { /*...*/ }

};

the compiler complains that fptr is undefined. is there a way of inheriting function pointer typedefs like this? thanks,
james

Answer 1

You should be able to inherit public typedefs like that.

Did you try something like this to make sure the compiler know it’s a parent type:

void doSomething(typename MyClass<T>::fptr my_fptr) { /*...*/ }