std.pattern..mixin temptes..std.concurrency

[Andrei Alexandrescu]

On 07/08/2010 10:26 AM, BLS wrote:
> Hi,
> Unfortunately Andrei has canceled his efforts on std.pattern.
>
> Despite that I would like to hear your opinion regarding std.patterns in
> general, I have a concrete problem in implementing patterns (like GOF
> stuff) with the help of mixin templates..
>
> A concrete example (atm. an evolving idea) is the implementation of a
> mixin template based "observer pattern". (publisher/subscriber)
>
> I've startet a discussion on d.learn and
> it would be very generous if you can have a look at :
> news://news.digitalmars.com:119/i1094m$7b8$1@digitalmars.com
> and follow the thread.
>
> Further :
> What do you think ?
> Would it makes sense to use the std.concurrency message passing system
> for OO patterns that require message passing ?

I think Observer is a very difficult pattern to make generic. There's 
very much variability. Here's an article I wrote about it:

http://docs.google.com/viewer?url=http://erdani.com/publications/cuj-2005-04.pdf

http://docs.google.com/viewer?url=http://erdani.com/publications/cuj-2005-06.pdf


Andrei