Final by default?

[bearophile]

Steven Schveighoffer:

> I think it may be best to introduce a new array property:
>
> dest.slength = src.length; // same as dest.length = src.length, 
> but follows D1 rules (slength = stomp length)
>
> If you use slicing (I'm assuming you do), then appending would 
> have to become a function/member instead of ~=.
>
> I can help write those if you want.

Eventually the D1 legacy will go away, so probably it's better to 
introduce something that later can be removed safely. So instead 
of "slength" it's better a name like "__slength", to allow its 
usage only if you compile with the "-d" compile switch (that 
activates deprecated features) and instead of a built-in array 
property as "length" it could be better (if possible) to make it 
a function in the object module as assumeSafeAppend.

Bye,
bearophile