akhuang added a comment.

In D87808#2282223 <https://reviews.llvm.org/D87808#2282223>, @rnk wrote:

> In D87808#2280197 <https://reviews.llvm.org/D87808#2280197>, @dblaikie wrote:
>
>> @rsmith What's the deal with these anonymous structs/unions? Why do they 
>> have copy/move constructors (are those technically called from the enclosing 
>> class's copy/move constructors?) but no default constructor to be called 
>> from the other ctors of the enclosing class?
>
> Yes, I'm curious: copy and move constructors require an object of this type 
> to already exist in memory. Is there a well-defined way of creating an object 
> of this type in memory when it has no other constructors?
>
> Maybe the issue is that this code is running into the lazy implicit special 
> member declaration optimization. Maybe the class in question has an implicit, 
> trivial, default constructor, but we there is no CXXConstructorDecl present 
> in the ctors list for the loop to find.

Yeah, I'd guess that it has a constructor but it doesn't show up in the loop?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D87808/new/

https://reviews.llvm.org/D87808

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