[OT] Clang seems to implement modules

[Walter Bright]

On 11/19/2012 6:11 PM, Michel Fortin wrote:
> On 2012-11-19 20:43:22 +0000, Walter Bright <newshound2 at digitalmars.com> said:
>
>> On 11/17/2012 3:30 AM, bearophile wrote:
>>> http://llvm.org/devmtg/2012-11/Gregor-Modules.pdf
>>
>> One thing to note what it doesn't do - it doesn't produce a "module" scope. As
>> far as I can tell, the symbols in imported modules all go into the global scope.
>>
>> It seems to be mainly a way of legitimizing precompiled headers.
>
> It's better semantically than precompiled headers because you're importing
> symbols only from the modules you import, not those from modules imported
> indirectly. Just that would be an incredible cleanup.

I know. I just pointed this out as I suspect this will not improve compile times 
more than precompiled headers do.


> It seems there are actually two models: you can make modules from existing
> headers (by writing module maps), or you can create modules directly by starting
> your .c/.cpp file with "export <module name>;" as can see on the Writing a
> Module slide. The former approach is introduced as the transitional model, the
> later as the futuristic one that requires no headers.

They could dub them ".ci" files <g>.