llvm-project

788731cd - [clang] Implement P3144R2 "Deleting a Pointer to an Incomplete Type..." (#97733)

[clang] Implement P3144R2 "Deleting a Pointer to an Incomplete Type..." (#97733) This patch implements (not yet published) [P3144R2](https://wiki.edg.com/pub/Wg21stlouis2024/StrawPolls/p3144r2.pdf) "Deleting a Pointer to an Incomplete Type Should be Ill-formed". Wording changes (not yet merged into the working draft) read: > 7.6.2.9 [expr.delete] Delete > If the object being deleted has incomplete class type at the point of deletion <del>and the complete class has a non-trivial destructor or a deallocation function, the behavior is undefined</del>, <ins>the program is ill-formed</ins>. We preserve status quo of emitting a warning when deleting a pointer to incomplete type up to, and including, C++23, but make it ill-formed since C++26. Same goes for deleting pointers to `void`, which has been allowed as an extension.