[clang] [Clang][P1061] Add stuctured binding packs (PR #121417)

[via cfe-commits]

https://github.com/cor3ntin commented:

The code and test coverage looks good.
There are a couple of comments that have not been addressed.

And there is @zygoloid suggestion to generalize `SubstNonTypeTemplateParmPackExpr`.

Maybe trying to land that today is not the brightest idea.
However, we should target to have it landed before rc2 or something like that
(we'd make a lot of folks happy having that in 20, I think)

@erichkeane @AaronBallman @Sirraide



https://github.com/llvm/llvm-project/pull/121417