By value or by reference?

[Donn Cave]

In article <uQScd.273$%h1.11 at newsread3.news.pas.earthlink.net>,
 Andrew Dalke <adalke at mindspring.com> wrote:

> Jorge Godoy wrote:
> > IIRC, by reference.  It uses a copy on write algorithm. 
> 
> Really?  Where?  I've heard theoretical rumblings about
> that but didn't realized it had been added anywhere.

I think this is a misimpression - the copy on write
part, I mean - that may go back to a discussion that
took place a year ago here, where someone energetically
but erroneously advocated that point of view.

   Donn Cave, donn at u.washington.edu