cor3ntin added a comment.

In D153536#4475215 <https://reviews.llvm.org/D153536#4475215>, @philnik wrote:

> Would it be possible to make `__` also a placeholder, so standard libraries 
> can use this before C++26? Or is `_` already a reserved identifier? (I don't 
> think so)

I don't see an issue allowing that in the std namespace. If we allow it 
everywhere, I'm afraid people will rely on it, which would hurt portability/be 
confusing.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D153536/new/

https://reviews.llvm.org/D153536

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