Can non-nullable references be implemented as a library?

[so]

> Andrei's stance is, either a library addon or ship D without that  
> feature. D's library already contains both tuples and algebraic data  
> types. They're simple to use, almost like in Python. The reason for  
> library addons isn't that builtin features make less sense, the reason  
> is that TDPL is already out and we can't improve the language in any  
> radical way.

Lets talk about solution in this thread more than politics, politics  
"never" improve anything.
Also It is not only Andrei, every single people here agreed on stopping  
"lets add this new feature to D today".

For the topic, i am trying to understand the use cases and implementations  
in other languages first.
D was born to solve problems right?
If supporting a feature looks/is impossible for user we should improve the  
language to help us solve this not just add the specific feature.
You know there'll never be enough features :)

-- 
Using Opera's revolutionary email client: http://www.opera.com/mail/