[clang] [clang-tidy]Add new check bugprone-casting-through-void (PR #69465)

[Piotr Zegar via cfe-commits]

================
@@ -0,0 +1,50 @@
+//===--- CastingThroughVoidCheck.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 "CastingThroughVoidCheck.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/Expr.h"
+#include "clang/AST/Type.h"
+#include "clang/ASTMatchers/ASTMatchFinder.h"
+#include "clang/ASTMatchers/ASTMatchers.h"
+#include "llvm/ADT/StringSet.h"
+
+using namespace clang::ast_matchers;
+
+namespace clang::tidy::bugprone {
+
+void CastingThroughVoidCheck::registerMatchers(MatchFinder *Finder) {
+  Finder->addMatcher(
+      explicitCastExpr(
+          hasDestinationType(qualType(pointsTo(qualType(unless(voidType()))))
----------------
PiotrZSL wrote:

this may not be working if pointer is behind typedef or template.
simply use:

```
unless(hasDestinationType(qualType(hasCanonicalType(pointsTo(voidType())))
```

https://github.com/llvm/llvm-project/pull/69465