[clang-tools-extra] [clang-tidy] Add `bugprone-pointer-arithmetic-on-polymorphic-object` check (PR #91951)

[Julian Schmidt via cfe-commits]

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@@ -0,0 +1,78 @@
+//===--- PointerArithmeticOnPolymorphicObjectCheck.cpp - clang-tidy--------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "PointerArithmeticOnPolymorphicObjectCheck.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/ASTMatchers/ASTMatchFinder.h"
+
+using namespace clang::ast_matchers;
+
+namespace clang::tidy::bugprone {
+
+namespace {
+AST_MATCHER(CXXRecordDecl, isAbstract) { return Node.isAbstract(); }
+} // namespace
+
+PointerArithmeticOnPolymorphicObjectCheck::
+    PointerArithmeticOnPolymorphicObjectCheck(StringRef Name,
+                                              ClangTidyContext *Context)
+    : ClangTidyCheck(Name, Context),
+      MatchInheritedVirtualFunctions(
+          Options.get("MatchInheritedVirtualFunctions", false)) {}
+
+void PointerArithmeticOnPolymorphicObjectCheck::storeOptions(
+    ClangTidyOptions::OptionMap &Opts) {
+  Options.store(Opts, "MatchInheritedVirtualFunctions", true);
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5chmidti wrote:

Please store the value of `MatchInheritedVirtualFunctions`, instead of `true`.

https://github.com/llvm/llvm-project/pull/91951