[clang-tools-extra] [clang-tidy] Add `bugprone-pointer-arithmetic-on-polymorphic-object` check (PR #91951)
Piotr Zegar via cfe-commits
cfe-commits at lists.llvm.org
Mon Jun 10 12:48:58 PDT 2024
================
@@ -0,0 +1,49 @@
+//===--- VirtualArithmeticCheck.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 "VirtualArithmeticCheck.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/ASTMatchers/ASTMatchFinder.h"
+
+using namespace clang::ast_matchers;
+
+namespace clang::tidy::bugprone {
+
+void VirtualArithmeticCheck::registerMatchers(MatchFinder *Finder) {
+ const auto PointerExprWithVirtualMethod =
+ expr(hasType(pointerType(pointee(hasDeclaration(
+ cxxRecordDecl(hasMethod(isVirtualAsWritten())))))))
+ .bind("pointer");
----------------
PiotrZSL wrote:
This should be default scenario, to detect all usage on polymorphic classes, and options should reduce scope.
I personally do not see use case for pointer arithmetic on such classes.
https://github.com/llvm/llvm-project/pull/91951
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