Testing some singleton implementations

[Jacob Carlborg]

On 2014-01-31 12:27, Andrej Mitrovic wrote:

> AFAIK D1's final was equivalent to D2's immutable. But I maybe
> remembering that wrong.

In D2 if if a variable is immutable or const you can not call non-const 
non-immutable methods via that variable. D1 didn't have any concept of 
this. "const" and "final" in D1 as more, you cannot change this variable.

> Or maybe D2 initially used final before
> settling for the new keyword immutable, to avoid confusion by users.

D2 used "invariant" before it used "immutable". It also changed the 
meaning of "const" compared to D1.

-- 
/Jacob Carlborg