CODEWITHSUNDEEP
c++classooppolymorphism
Ashinori
Ashinori

Reputation: 57

error: no matching function for call to 'Subclass::...'

I'm doing an OOP project for school, and I'm currently stuck because of the following problem :

Let's say that A is my base class, that B inherits from A and C inherits from B.

A has a method to check whether two A-type objects are colliding.

This method is not redefined/overdriven in C, but I have to use it in this subclass.


class A 
{
  public:
    bool isColliding(A);
};

class B : public A 
{
};

class C : public B 
{
  public:
    void Eat(B);
}

void C::Eat(B objectB) 
{
  if(isColliding(objectB)) 
  {
  }
}

This is an oversimplification of the code, I was just trying to convey the idea.

It returns the following : 

error : no matching function for call to 'C::isColliding(B)'
note: candidate: bool A::isColliding(A)
note: no known conversion for argument 1 from 'B' to 'A'.

How do I get this method to interpret C and B as being A for it to work ?

Upvotes: 1

Views: 188

Answers (1)

Paul Evans
Paul Evans

Reputation: 27577

In order to access a base-class member, you have to say so explicitly, like this:

if(A::isColliding(objectB)) {

Upvotes: 2

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