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]

Oliver Anhuth wrote:

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]

"Oliver Anhuth" <q4******@bonsai.fernuni-hagen.de> wrote in message news:bj**********@beech.fernuni-hagen.de...

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]

"Oliver Anhuth" <q4******@bonsai.fernuni-hagen.de> wrote in message
news:bj**********@beech.fernuni-hagen.de...

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