Historical language survey

[Sean Kelly]

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.


Sean