[PATCH] D156054: [Clang][Sema] DR722 (nullptr and varargs) and missing -Wvarargs diagnostics

Mon Aug 7 06:48:29 PDT 2023

aaron.ballman added a comment.

Precommit CI found a related issue that should be addressed.

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Comment at: clang/www/cxx_dr_status.html:4376
     <td>Can <TT>nullptr</TT> be passed to an ellipsis?</td>
-    <td class="none" align="center">Unknown</td>
+    <td class="unreleased" align="center">Clang 17</td>
   </tr>
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MitalAshok wrote:
> It may be better to mark this as "Yes", since in old clang versions passing nullptr would work by virtue of it having representation of a null void* pointer, and it only affected diagnostics
I think it's better to use Clang 18, otherwise people will think there's a diagnostic bug with earlier versions. We usually use "Yes" to mean "we've always supported this correctly, as best we can tell".

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  https://reviews.llvm.org/D156054/new/

https://reviews.llvm.org/D156054