Static memfun through null ptr

[Oliver Anhuth]

Hello all,

is it legal to call a static member function with a null pointer?

Is this correct C++?

class X {
public:
static void f() {}
};

int main() {
X* pX = 0;
pX->f();
}

Thanks Oliver

 

[Gianni Mariani]

Hello all,

is it legal to call a static member function with a null pointer?

Is this correct C++?

class X {
public:
static void f() {}
};

int main() {
X* pX = 0;
pX->f();
}

Thanks Oliver

No, it is not legal.

The behaviour is undefined.

 

[Ron Natalie]

Hello all,

is it legal to call a static member function with a null pointer?

No. It is illegal to dereference, that is apply * or -> to a null pointer
even if the result would appear not to care about the actual value of
the pointer.

 

[Howard]

Hello all,

is it legal to call a static member function with a null pointer?

Is this correct C++?

class X {
public:
static void f() {}
};

int main() {
X* pX = 0;
pX->f();
}

Thanks Oliver

No, it's not legal, but if it's static then you don't need an instance
variable at all. Just call it like this:

X::f();

-Howard