I just got it! (invariant/const)

[Simen Kjaeraas]

On Thu, 10 Apr 2008 01:07:51 +0200, Janice Caron <caron800 at googlemail.com>  
wrote:

> On 09/04/2008, Simen Kjaeraas <simen.kjaras at gmail.com> wrote:
>>  class foo
>>  {
>>         invariant int bar;
>>
>>         this()
>>         {
>>                 bar = 4;
>>         }
>>  }
>>
>>  This works under DMD 2.012.
>
> That's interesting. I did not know that.


I can't quite see what would be the difference between const and
invariant in this example.  It's a member variable that is local
to each instance, and cannot be changed. Why should it not work?

-- Simen