Fznamznon added a comment.

> With code like struct A {}; <and the rest of your example>, the expressions 
> were parsed as redefining struct A and failed. However, as clarified by 
> CWG2141, new-expression cannot define a type, so both these expressions 
> should be considered as valid references to the previously declared struct A.
Sure, thank you and sorry for the confusion! I should have added `struct A {};` 
to the example in the first place.

> I think the root cause of that issue is that we don't implement DR2141 
> (https://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#2141); are you 
> intending to cover that DR? If so, there should be tests added to 
> clang/test/CXX/drs/dr21xx.cpp.

The original intent was to fix the bug because I wasn't confident enough that 
I'll be able to cover all possible cases by the tests. Will the simple examples 
that I'm already adding to clang/test/Parser/cxx11-type-specifier.cpp test be 
enough?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D153857/new/

https://reviews.llvm.org/D153857

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