Call of overloaded method with nullptr is ambiguous

Question

I have some overloaed methods which take some different pointer types.
Now I want to call one specific method with nullptr as a parameter.

I know that I could cast the nullptr to the specific type of pointer, the method I want it to call takes.
But I don't want to/can't cast the nullptr.

This example shoud explain what I am trying to do:

class Foo {
    //some attributes
};
class Bar {
    //some attributes
};

void myMethod (Foo*) {
    //I want this method to be called
}
void myMethod (Bar*) {
    //Not this one
}

int main () {
    myMethod(nullptr);              //Something like this
//  myMethod(static_cast<nullptr>); //I don't want to write this.

    return 0;
}

If I just call it with the nullptr I get
error: call of overloaded 'myMethod(std::nullptr_t)' is ambiguous
because the compiler doesn't know which of the methods it should call.

Is there a way to do what I want?
Like something similar to the template specialization?

Answer 1

You can create an overload which take std::nullptr_t as argument, and then in it call the exact function wanted (through casting):

void myMethod(std::nullptr_t)
{
    myMethod(static_cast<Foo*>(nullptr));
}