I want to add a Phobos module with template mixins for common idioms.

[Idan Arye]

On Tuesday, 21 May 2013 at 14:58:16 UTC, Idan Arye wrote:
> At any rate, I am forced to admit I made a mistake about 
> `hasIntance()` not needing synchronization. I neglected the 
> possibility that the constructor(or anything else used for 
> initialization) can throw!
>
> The compiler might decide that it's better to write the global 
> reference first, and if the initializer throws just set it back 
> to null. If that is the case, `hasInstance()` could see that 
> the global reference is not null and return true, and then the 
> initializer will throw and the initializing thread will set the 
> global reference to null again.
>
> So yea, I'm gonna have to synchronize it too...

OK, it is done.

Next step - write the introduction. And then add the shared 
version of the singleton.