[clang-tools-extra] [clang-tidy] add new check: modernize-use-scoped-lock (PR #126434)

[Piotr Zegar via cfe-commits]

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@@ -0,0 +1,233 @@
+//===--- UseScopedLockCheck.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 "UseScopedLockCheck.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/Decl.h"
+#include "clang/AST/Stmt.h"
+#include "clang/AST/Type.h"
+#include "clang/ASTMatchers/ASTMatchFinder.h"
+#include "clang/ASTMatchers/ASTMatchers.h"
+#include "clang/Basic/SourceLocation.h"
+#include "clang/Lex/Lexer.h"
+#include "llvm/ADT/Twine.h"
+#include <iterator>
+#include <optional>
+
+using namespace clang::ast_matchers;
+
+namespace clang::tidy::modernize {
+
+namespace {
+
+bool isLockGuard(const QualType &Type) {
+  if (const auto *Record = Type->getAs<RecordType>()) {
+    if (const RecordDecl *Decl = Record->getDecl()) {
+      return Decl->getQualifiedNameAsString() == "std::lock_guard";
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PiotrZSL wrote:

could this be done without using getQualifiedNameAsString ? Maybe with [isInStdNamespace](https://clang.llvm.org/doxygen/classclang_1_1Decl.html#a066b012f94431b5bba21d19715a274f4) and normal name checking ?

https://github.com/llvm/llvm-project/pull/126434