iains added a comment.

In D126694#4470261 <https://reviews.llvm.org/D126694#4470261>, @ChuanqiXu wrote:

>> That is clearly a big motivation - I will ask the folks we were talking to 
>> at WG21 if that is their priority - or maybe they care about language 
>> isolation etc.
>
> Yeah, I know the folks in WG21 prefer the language isolation. But you know, 
> there are many folks who are not in WG21...

indeed :)

> Oh, the thing I want to say, in this case we have a chance to improve the 
> compilation speed significantly and the so called diagnose quality became a 
> blocker for us. Also it is beneficial to remove them out of the BMI to 
> improve the language isolation feature.

Yes, that was the decision at the last time we looked - because removing decls 
would degrade this - if we have new information that changes our preferred 
design, then fine.  
One solution is to place the elision behind a flag so that the user can choose 
slower compilation with better diagnostics or faster compilation but maybe 
harder-to-find errors?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D126694/new/

https://reviews.llvm.org/D126694

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