std.patterns: it was about time

[Andrei Alexandrescu]

Andrei Alexandrescu wrote:
> Ary Borenszweig wrote:
>> Andrei Alexandrescu escribió:
>>> In wake of the increasing power of templates in D2, I am starting the 
>>> std.patterns module, which is to contain boilerplate for a number of 
>>> common design patterns (as in the GoF book). For now I'm adding a 
>>> Visitor implementation, which was lying in my codebase for a while.
>>>
>>> http://ssli.ee.washington.edu/~aalexand/d/web/phobos/std_patterns.html
>>> http://ssli.ee.washington.edu/~aalexand/d/web/phobos/std_patterns.d
>>>
>>> Comments and suggestions are as always welcome.
>>
>> It's nice to implement patterns with mixins, like Singleton in my video.
> [...]
> 
> Thanks for sharing your insights. So far Visitor is concerned with I 
> disagree with the "automatically" here. Visitor has one purpose in life: 
> you call accept() with the appropriate visitor, it calls visit() back 
> with the appropriate type.

Heh, I've mixed up copy and paste across a draft response. You may want 
to ignore the ``I disagree with the "automatically" here.'' part. I meant:

Thanks for sharing your insights. So far Visitor has one purpose in 
life: you call accept() with the appropriate visitor, it calls visit() 
back with the appropriate type.


Andrei