> On 19 Mar 2025, at 00:31, Marcin Jaczewski <marcinjaczewski86_at_[hidden]> wrote:
>
> wt., 18 mar 2025 o 23:05 Hans Åberg via Std-Proposals
> <std-proposals_at_[hidden]> napisał(a):
>>
>> Allowing for compiler diagnostic, and can be overridden, not relying solely on the linker to detect errors.
>>
>
> Please rethink this step by step, who diagnoses it and based on what
> exactly? What TU know this and what TU do not.
> How and where exactly its overridden? Is same TU as usage or
> different? If diffrent then when it will be compiled, before or after
> TU that use it?
> If after how TU that use it know if you did that as there is NO info
> available for him now.

What is “TU”?

> Write some pseudo code that try do this, and you will see that it's
> impossible to implement in the way you describe it.

See my other post for a detailed example.