Re: [Rosegarden-devel] proposal : making Events value-based

[Guillaume L. <gla...@te...>]

On Tuesday 30 October 2001 13:36, Chris Cannam wrote:
>
> Because I like wasting my time in idle speculation, I'm going to
> guess that he's talking about making event classes share their
> data, by default, when they're copied, and then only unshare when
> you try to change something.

Yes. That's the COW (Copy On Write) thingy.

>  Presumably the intention is to make copying cheaper in some cases

No, that's just a byproduct. The intention is to have Event being like 
std::string, instead of being like char*. I'd like to manipulate Event 
through plain values, not pointers.

> Don't think I've encountered the term "value-based", and that's
> what's confusing me -- the rest of the text of the email suggested
> the above, anyway.

I think it's commonly used but may be I just made it up from too much 
reading, I don't know :-). Would "value semantics" vs. "pointer semantics" 
make more sense ?

-- 
Guillaume
http://www.telegraph-road.org