static definitions

[LuB]

Hi,

I know that instance members are instantiated in the order they are
declared.

Does the same hold true for static class members?



Is the following well-defined?


-----------------------------------------------


struct A
{
int a;
};

class B
{
static A a_;
static int b_;
}

....

A B::a_ = { 1 };

// IS *THIS* WELL DEFINED?
int B::b_ = B::a_.a;


-----------------------------------------------



Please pardon any typos ... thanks,

-Luther

 

[Victor Bazarov]

I know that instance members are instantiated in the order they are
declared.

Does the same hold true for static class members?

No. They are initialised in the order they are _defined_.

Is the following well-defined?


-----------------------------------------------


struct A
{
int a;
};

class B
{
static A a_;
static int b_;
}

^^^
No, not well-defined. Forgot a semicolon here.

...

A B::a_ = { 1 };

// IS *THIS* WELL DEFINED?
int B::b_ = B::a_.a;
Yes.

Please pardon any typos ... thanks,

Well... OK, the absence of the semicolon _can_ be viewed as
a typo, of course. I'll leave my note in, however.

V

 

[LuB]

Thanks Victor!

-Luther