Inability to dup/~ for const arrays of class objects

[Steven Schveighoffer]

On Sat, 25 May 2013 23:58:39 -0400, Peter Williams  
<pwil3058 at bigpond.net.au> wrote:

> Is the inability to use dup and ~ with const arrays of class objects a  
> deliberate design restriction?  I couldn't find mention of it in the  
> specification or Andrei's book and only discovered it the hard way.

It has to be.  There is no cdup.

For any const(T)[] x, the type of x.dup is T[].  Because this would mean  
that you would remove const, you cannot do that.  Nor can you idup, since  
implicit conversion to immutable is not possible.

As far as I know, ~ works with const arrays of class objects.  Can you  
give a case where it fails?

-Steve