static member function in class template

[Martin Vorbrodt]

SO i have a class:

template<typename T>
class Vector {
public:
static const Vector<T> UNIT_X();
};

template<typename T>
static const Vector<T> UNIT_X() {
static const Vector<T> unit_x(1,0,0);
return unit_x;
}

GCC 3.4 tell me i can't declare UNIT_X member function to have static
linkage.

How do i go about having such static function.

I want to be able to do Vector<int>::UNIX_X();

Please help.

Martin

 

[mlimber]

SO i have a class:

template<typename T>
class Vector {
public:
static const Vector<T> UNIT_X();
};

template<typename T>
static const Vector<T> UNIT_X() {

Try this line instead:

static const Vector<T> unit_x(1,0,0);
return unit_x;
}

GCC 3.4 tell me i can't declare UNIT_X member function to have static
linkage.

How do i go about having such static function.

I want to be able to do Vector<int>::UNIX_X();

Please help.

Martin

Cheers! --M

 

[Martin Vorbrodt]

of course, thanks! silly me.

now another thing. the static function must be defined in the header file as
well right? doesn't that violate ODR?

martin

 

[John Harrison]

of course, thanks! silly me.

now another thing. the static function must be defined in the header file as
well right? doesn't that violate ODR?

templates are an exception to ODR.

john

 

[puzzlecracker]

templates are an exception to ODR.

john

what is ODR (one definition rule)?

 

[ma740988]

|| what is ODR (one definition rule)?
Yep!!

 

[puzzlecracker]

|| what is ODR (one definition rule)?
Yep!!

I don't think "Yep" is a definition. Get a life -trol!

 

[Martin Vorbrodt]

Even static members of templates? Well, I believe it, the code works, but...
feels dirty. Static functions definitions in header files... I guess export
would fix that. Too bad my compiler doesn't this so

Anyone knows a 100% conforming compiler? Is there one in works?

Thanx

 

[Kai-Uwe Bux]

a) please don't top post.

Even static members of templates? Well, I believe it, the code works,
but... feels dirty. Static functions definitions in header files...

Why dirty? I consider support for separate compilation more an issue of
speeding up the built process and not that much an issue of code
organization.

I guess export would fix that. Too bad my compiler doesn't this so

Anyone knows a 100% conforming compiler? Is there one in works?

Check out http://www.comeaucomputing.com/


Best

Kai-Uwe Bux