DIP 45 - approval discussion

[Martin Nowak]

On Sunday, 10 November 2013 at 19:47:16 UTC, Walter Bright wrote:
> It's long been recognized that using global variables to 
> communicate between interfaces is a bad idea. And it isn't even 
> supported for dlls, because the proposed solution to making 
> them work is to wrap them with a function (much like D 
> properties).
>
> We'd be going out of our way to support a recognized bad 
> paradigm. There is currently no existing D code that requires 
> this. If we add it, then we'd be stuck with supporting it for 
> backwards compatibility. If we don't add it, and it becomes 
> some sort of crisis that it isn't supported, we can add it in 
> later without breaking things.

Yes, data interfaces (be it TLS or __gshared) are bad and make it 
more difficult to maintain a stable ABI. I also agree that TLS 
accesses shouldn't be a big problem.