[PATCH] D120589: [Clang] Implement decltype(auto)(x) from P0849R2

Fri Mar 25 07:31:28 PDT 2022

erichkeane added a comment.

In D120589#3408015 <https://reviews.llvm.org/D120589#3408015>, @aaron.ballman wrote:

> I'm adding more reviewers for a wider audience on this topic. Personally, I don't think we should support this extension. EWG voted pretty strongly against it: 0/3/7/6/1 (https://github.com/cplusplus/papers/issues/293#issuecomment-585662477) and Clang has a policy that language extensions should have representation within the appropriate governing body (https://clang.llvm.org/get_involved.html#criteria). Given that the governing body for this rejected it and there's not a significant user benefit to supporting it, I think we shouldn't step into the C++ design space for this extension. However, I have no idea how others feel.

I tend to agree, EWG seemed quite against this (though sadly, it looks like the minutes never got uploaded to the wiki).  For something to fail the 'is a problem worth solving' (aka, the 'author should do more work' vote) it means the room was quite against it.  While I can see the attraction of this, I don't think it is a good feature.

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https://reviews.llvm.org/D120589