dup method const or not?

[Matthias Walter]

On 2011-11-27 23:48, mta`chrono wrote:
> that's a real good question. it fails with the following error:
> 
> Error: function std.bitmanip.BitArray.dup () is not callable using
> argument types () const
> 
> 
> here is a hack:
> 
> ---
> import std.bitmanip;
> import core.stdc.string;
> 
> void main()
> {
>     const(BitArray) foo;
>     BitArray bar;
> 
>     memcpy(&bar, &foo, BitArray.sizeof);
> }

Well, this hack doesn't even work - as it does a shallow copy only,
immediately setting bits of bar also changes bits of foo!

Matthias