[clang] [RFC] Initial implementation of P2719 (PR #113510)

[Oliver Hunt via cfe-commits]

================
@@ -3503,9 +3518,23 @@ bool FunctionDecl::isDestroyingOperatorDelete() const {
       getNumParams() < 2)
     return false;
 
-  auto *RD = getParamDecl(1)->getType()->getAsCXXRecordDecl();
-  return RD && RD->isInStdNamespace() && RD->getIdentifier() &&
-         RD->getIdentifier()->isStr("destroying_delete_t");
+  if (isTypeAwareOperatorNewOrDelete())
+    return false;
+
+  return getParamDecl(1)->getType()->isDestroyingDeleteT();
----------------
ojhunt wrote:

I just did a quick check, we're currently at a 45 bits for FunctionDeclBits so 
adding these bits shouldn't increase the size of anything, but would require 
reducing the bits available to NumCtorInitializers in CXXConstructorDecl

https://github.com/llvm/llvm-project/pull/113510
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