any news on const/invariant?

[Victor Tyurin]

Walter, please, explain us, why you don't post any thoughts on important
     language features like const?
Why you don't tell us about concepts you want to change in constness?
I think it will be very useful to discuss important features with
community, before those will be implemented.
As you can see, consts and invariants was not successful, i think,
because it has not been discussed on conceptual stage...

> Denton Cockburn wrote:
>> Any update on the status of the const/invariant changes?
> 
> Yes, it's about done.
> 
>> I'm using D 2.0 in some things, and would hate to learn to do it X way,
>> only to have it changed on me.
> 
> While the semantic changes are extensive, I've found to my surprise that
> little has to change in source code that uses const.