[boost] Re: Constructor of iterator_adaptor takes parameter by value

From: David Abrahams (dave_at_[hidden])
Date: 2004-01-09 14:22:30

hartmutkaiser_at_[hidden] (Hartmut Kaiser) writes:

> David Abrahams wrote: 
>
>> > Completely relying on MOJO or similar techniques would 
>> require, that 
>> > I'm able/allowed to _modify_ the base iterator code, which isn't 
>> > always true.
>> 
>> I'm not talking about relying on MOJO, I'm talking about 
>> andrei's finding that on compilers that elide copies, passing 
>> objects by reference if they're just going to be copied 
>> anyway is almost always a mistake.
>
> Sorry, I've misunderstood. 
>
> It seems to me, that Andrei wrote his 'Lying const' statements under the
> strong impression, that ZUTO would work as expected. But AFAIR ZUTO never
> worked as envisioned and therefor MOJO was developed. But I'm not pushing
> you to use a const reference, it was merely a question to understand the
> rationale behind this design decision.

I don't feel pushed.  I would like to do it, and have only one small
reservation.  If you could clear that matter up definitively I'd be
very happy to make the change.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com