On Tue, January 5, 2010 13:12, Frederik wrote:
> Non-value-type static class variables are only initialized after the
> class was instantiated at least once. This behaviour is a little bit
> counter-intuitive, and I hope it will change in the future.
I have to disappoint you -- that behaviour can't change.
The problem is, that the while the mechanism for static constructors
exists for C++, there does not seem to be a portable way to use it from
C (in gcc you can use the __attribute__((constructor)), but that's an
extension).
> You have several options:
>
> - create a throw-away instance:
>
> static int main (string[] args) {
> new Global ();
> stdout.printf ("all data is in: " + Global.dataDir);
> return 0;
> }
Actually, there is no need to do that -- calling typeof(Global); is enough.
> - call a static initialization method:
>
> static int main (string[] args) {
> Global.init ();
> stdout.printf ("all data is in: " + Global.dataDir);
> return 0;
> }
This should not work. *static* methods do not cause a class to be
initialized (*class* methods do, though).
> - make 'dataDir' const, if it is not intended to change
- make the variable a class one instead of static one.
public class Global {
class string dataDir = "whatever";
}
--
- Jan Hudec <[email protected]>
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