================
@@ -0,0 +1,89 @@
+//===--- ComparePointerToMemberVirtualFunctionCheck.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 "ComparePointerToMemberVirtualFunctionCheck.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/ASTTypeTraits.h"
+#include "clang/AST/DeclCXX.h"
+#include "clang/AST/OperationKinds.h"
+#include "clang/AST/Type.h"
+#include "clang/ASTMatchers/ASTMatchFinder.h"
+#include "clang/ASTMatchers/ASTMatchers.h"
+#include "clang/ASTMatchers/ASTMatchersMacros.h"
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Basic/DiagnosticIDs.h"
+#include "llvm/ADT/SmallVector.h"
+
+using namespace clang::ast_matchers;
+
+namespace clang::tidy::bugprone {
+
+AST_MATCHER(CXXMethodDecl, isVirtual) { return Node.isVirtual(); }
+
+void ComparePointerToMemberVirtualFunctionCheck::registerMatchers(
+ MatchFinder *Finder) {
+
+ auto DirectMemberPointer = unaryOperator(
+ allOf(hasOperatorName("&"),
+ hasUnaryOperand(declRefExpr(to(cxxMethodDecl(isVirtual()))))));
+ auto IndirectMemberPointer = ignoringImpCasts(declRefExpr());
+
+ auto BinaryOperatorMatcher = [](auto &&Matcher) {
----------------
PiotrZSL wrote:
Avoid matching same thing twice, this can be writeln as:
```
binaryOperator(hasAnyOperatorName("==", "!="),
hasEitherOperand(hasType(memberPointerType(pointee(functionType())))),
anyOf(binaryOperator(hasEitherOperand(DirectMemberPointer)).bind("direct_member_pointer"),
binaryOperator(hasEitherOperand(IndirectMemberPointer)).bind("indirect_member_pointer")),
unless(hasEitherOperand(castExpr(hasCastKind(CK_NullToMemberPointer))))
)
```
https://github.com/llvm/llvm-project/pull/66055
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