«

Hi,
I need to initialize a static data member by calling a method of another
static member. Like:

class A
{
public:
static int TYPE;
private
static Type _s_type;
};

int A::TYPE = _s_type.ID();
Type A::_s_type;

I compiled the code with my compiler. But I'm not sure whether it complies
with the standard.

Thanks.
Sam

Sam wrote:
> Hi,
> I need to initialize a static data member by calling a method of
> another static member. Like:
>
> class A
> {
> public:
> static int TYPE;
> private
> static Type _s_type;
> };
>
> int A::TYPE = _s_type.ID();
> Type A::_s_type;
>
> I compiled the code with my compiler. But I'm not sure whether it
> complies with the standard.

I complies in a sense that it's well-formed. However, it has undefined
behaviour because when you try to initialise A::TYPE, A::_s_type, which
you need, hasn't been initialised properly yet. Reorder their definitions.

V

> I complies in a sense that it's well-formed. However, it has undefined
> behaviour because when you try to initialise A::TYPE, A::_s_type, which
> you need, hasn't been initialised properly yet. Reorder their
> definitions.
>
> V
Thank you very much for your reply. Do you mean that it works well as long
as _s_type is defined before TYPE?
Type A::_s_type;
int A::TYPE = _s_type.ID();
I was wondering what the standard says about this.

Sam