[clang-tools-extra] [clang-tidy] Fix erroneous warning to make deleted function public (PR #182577)

[Jakob Widauer via cfe-commits]

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@@ -39,6 +40,21 @@ AST_MATCHER(CXXMethodDecl, isSpecialFunction) {
   return isa<CXXDestructorDecl>(Node) || Node.isCopyAssignmentOperator() ||
          Node.isMoveAssignmentOperator();
 }
+
+AST_MATCHER(CXXMethodDecl, hasPublicOverload) {
+  const DeclContext::lookup_result LookupResult =
+      Node.getParent()->lookup(Node.getNameInfo().getName());
+
+  if (LookupResult.isSingleResult())
+    return false; // No overloads
+
+  auto IsPublicOverload = [](const Decl *Overload) {
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jwidauer wrote:

Nice! Good idea! Thanks!

https://github.com/llvm/llvm-project/pull/182577