NoumanAmir657 added a comment.

In D158540#4628860 <https://reviews.llvm.org/D158540#4628860>, @aaron.ballman 
wrote:

> In D158540#4628629 <https://reviews.llvm.org/D158540#4628629>, @NoumanAmir657 
> wrote:
>
>> In D158540#4628310 <https://reviews.llvm.org/D158540#4628310>, 
>> @aaron.ballman wrote:
>>
>>> In D158540#4628265 <https://reviews.llvm.org/D158540#4628265>, 
>>> @NoumanAmir657 wrote:
>>>
>>>> No, I don't have code examples that showcase the importance of the note. 
>>>> As you said the class context would be obvious whenever we run into this 
>>>> error.
>>>> The test files also don't show where the note would be helpful.
>>>
>>> The crux of https://github.com/llvm/llvm-project/issues/64843 is about the 
>>> error diagnostic, and that logic hasn't been changed in this patch -- are 
>>> there other changes that are missing from the patch? The text of the tests 
>>> shows that the error diagnostic behavior should have changed as well, but 
>>> I'm not seeing the functional changes to make that happen.
>>
>> Can you elaborate further? I did not understand what you mean by functional 
>> changes. According to my knowledge, I don't think anything else is missing 
>> from the patch.
>
> The only changes I see in the review are the addition of 
> `note_incorrect_defaulted_constexpr` and emitting that note. However, I see 
> test cases changing from:
>
>   constexpr W() __constant = default; // expected-error {{defaulted 
> definition of default constructor is not constexpr}}
>
> to
>
>   constexpr W() __constant = default; // expected-error {{default constructor 
> cannot be 'constexpr' in a class with virtual base classes}} expected-note 
> {{see reference to function 'W' in 'W' class}}
>
> where the error wording is now different, but I don't see any code changes to 
> the compiler for the error wording.

I changed the error wording in the file DiagnosticSemaKinds.td

"%sub{select_special_member_kind}0 cannot be 'constexpr' in a class with 
virtual base classes">;


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D158540/new/

https://reviews.llvm.org/D158540

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