[fpc-devel] Considerations about observer [was: Free Pascal 2.6.2 rc1]

[Leonardo M. Ramé]

----- Original Message -----

> From: Michael Van Canneyt <michael at freepascal.org>
> To: FPC developers' list <fpc-devel at lists.freepascal.org>
> Cc: 
> Sent: Tuesday, November 27, 2012 1:19 PM
> Subject: Re: [fpc-devel] Considerations about observer [was: Free Pascal 2.6.2 rc1]
> 
> 
> 
> On Tue, 27 Nov 2012, luiz americo pereira camara wrote:
> 
>>  2012/11/13 Marco van de Voort <marcov at stack.nl>:
>>> 
>>>  Hello,
>>> 
>>>  We have placed the first release-candidate of the Free Pascal Compiler
>>>  version 2.6.2 on our ftp-servers.
>> 
>>  [..]
>> 
>> 
>>>    * Support for observer pattern added to fcl-base (and base classes in 
> RTL)
>> 
>>  Hi, i requested a change to observer interface with some
>>  considerations in http://bugs.freepascal.org/view.php?id=23394
> 
> It will not happen.
> 
> If you want to pass around interfaces safely, then you need to implement them as
> descendents of IUnknown to maintain reference counts. They are implemented as 
> CORBA 
> interfaces exactly to avoid the overhead of IUnknown.
> 
> The consequence is that you must pass around the objects themselves.
> 
> Michael.


Hi, does anyone know of a link to the wiki with info about the newly implemented Observer pattern?.


-- 

Leonardo M. Ramé
http://leonardorame.blogspot.com