>> public class Singleton<G>
>> {
>> public G instance {get; private set; }
>>
>> public Singleton(owned G instance)
>> {
>> _instance = (owned) instance;
>> }
>> }
>>
>> public class Prefs
>> {
>> internal Prefs ()
>> {
>> stdout.printf ("constructor\n");
>> }
>>
>> public void do_something()
>> {
>> stdout.printf("Doing something...\n");
>> }
>>
>> ~Prefs ()
>> {
>> stdout.printf ("destruction\n");
>> }
>> }
>>
>> Singleton<Prefs> preferences;
>>
>> public static void main (string[] args)
>> {
>> preferences = new Singleton<Prefs>(new Prefs());
>>
>> preferences.instance.do_something();
>> preferences.unref();
>> }
>>
>
> What's the point of this code? The Singleton class is redundant, you can
> do exactly the same just by storing a single instance of Prefs in a
> global variable. That's not a singleton.
> Note: you should use preferences = null, rather than unref()
I guess is a way to have a generic way to add the singleton behavior
to a class, just as this proposed (and rejected) utility in boost:
http://torjo.com/tobias/
vmjl
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