dup and arrays

[strtr]

Ellery Newcomer Wrote:

> I just noticed that dup does not dup deep.
> 
> In a two second search I couldn't find any reason for or against, but 
> I'd kinda like it if
> 
> auto r2 = r.dup;
> r2[i][j] = 0;
> r[i][j] = 1;
> assert(r2[i][j] != r[i][j]);
> 
> held.

There have been discussions about this before.
Here is the first I found (couldn't find my own .ddup request :)
http://www.digitalmars.com/webnews/newsgroups.php?art_group=digitalmars.D&article_id=12631