Historical language survey

[Sean Kelly]

Walter Bright wrote:
> Sean Kelly wrote:
>> Walter Bright wrote:
>>>
>>> And I still don't know anything about M3 <g>. But being able to 
>>> extend imports without breaking users can easily be done with some 
>>> variation on the PIMPL technique or interfaces.
>>
>> But PIMPL only works if combined with header files, and it shouldn't 
>> be necessary to resort to this just to avoid symbol collisions with 
>> implementation-level stuff.  I do think it's a useful tool when 
>> complete implementation hiding is necessary for business reasons, but 
>> not as a general tool to work around what feels like a language issue.
> 
> It isn't to avoid symbol collisions, it's to make the user of the class 
> immune to adding new members to the implementation of the class.

Ah, my mistake then.  I confused what you were saying with my comment on 
the D import rules.


Sean