[clang-tools-extra] [clang-tidy][NFC] add '.clang-tidy' config for clang-tidy project (PR #147793)

[Baranov Victor via cfe-commits]

https://github.com/vbvictor updated https://github.com/llvm/llvm-project/pull/147793

>From a0fd1b04817c03685bacd70f763ef0f62dd4e425 Mon Sep 17 00:00:00 2001
From: Victor Baranov <bar.victor.2002 at gmail.com>
Date: Wed, 9 Jul 2025 21:00:30 +0300
Subject: [PATCH] [clang-tidy][NFC] add '.clang-tidy' config for clang-tidy
 project

---
 clang-tools-extra/clang-tidy/.clang-tidy              | 11 +++++++++++
 .../bugprone/CrtpConstructorAccessibilityCheck.cpp    |  7 ++-----
 .../clang-tidy/bugprone/SizeofExpressionCheck.cpp     | 10 +++++-----
 3 files changed, 18 insertions(+), 10 deletions(-)
 create mode 100644 clang-tools-extra/clang-tidy/.clang-tidy

diff --git a/clang-tools-extra/clang-tidy/.clang-tidy b/clang-tools-extra/clang-tidy/.clang-tidy
new file mode 100644
index 0000000000000..65af940909efe
--- /dev/null
+++ b/clang-tools-extra/clang-tidy/.clang-tidy
@@ -0,0 +1,11 @@
+InheritParentConfig: true
+Checks: [
+  bugprone-*,
+  -bugprone-assignment-in-if-condition,
+  -bugprone-branch-clone,
+  -bugprone-easily-swappable-parameters,
+  -bugprone-narrowing-conversions,
+  -bugprone-suspicious-stringview-data-usage,
+  -bugprone-unchecked-optional-access,
+  -bugprone-unused-return-value
+]
diff --git a/clang-tools-extra/clang-tidy/bugprone/CrtpConstructorAccessibilityCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/CrtpConstructorAccessibilityCheck.cpp
index 28e8fe002d575..6565fa3f7c85b 100644
--- a/clang-tools-extra/clang-tidy/bugprone/CrtpConstructorAccessibilityCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/CrtpConstructorAccessibilityCheck.cpp
@@ -129,13 +129,10 @@ void CrtpConstructorAccessibilityCheck::check(
         << HintFriend;
   }
 
-  auto WithFriendHintIfNeeded =
-      [&](const DiagnosticBuilder &Diag,
-          bool NeedsFriend) -> const DiagnosticBuilder & {
+  auto WithFriendHintIfNeeded = [&](const DiagnosticBuilder &Diag,
+                                    bool NeedsFriend) {
     if (NeedsFriend)
       Diag << HintFriend;
-
-    return Diag;
   };
 
   if (!CRTPDeclaration->hasUserDeclaredConstructor()) {
diff --git a/clang-tools-extra/clang-tidy/bugprone/SizeofExpressionCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/SizeofExpressionCheck.cpp
index 88d2f2c388d07..88e048e65d4e8 100644
--- a/clang-tools-extra/clang-tidy/bugprone/SizeofExpressionCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/SizeofExpressionCheck.cpp
@@ -370,16 +370,16 @@ void SizeofExpressionCheck::check(const MatchFinder::MatchResult &Result) {
         << E->getSourceRange();
   } else if (Result.Nodes.getNodeAs<Stmt>("loop-expr")) {
     auto *SizeofArgTy = Result.Nodes.getNodeAs<Type>("sizeof-arg-type");
-    if (const auto member = dyn_cast<MemberPointerType>(SizeofArgTy))
-      SizeofArgTy = member->getPointeeType().getTypePtr();
+    if (const auto *Member = dyn_cast<MemberPointerType>(SizeofArgTy))
+      SizeofArgTy = Member->getPointeeType().getTypePtr();
 
     const auto *SzOfExpr = Result.Nodes.getNodeAs<Expr>("sizeof-expr");
 
-    if (const auto type = dyn_cast<ArrayType>(SizeofArgTy)) {
+    if (const auto *Type = dyn_cast<ArrayType>(SizeofArgTy)) {
       // check if the array element size is larger than one. If true,
       // the size of the array is higher than the number of elements
-      CharUnits sSize = Ctx.getTypeSizeInChars(type->getElementType());
-      if (!sSize.isOne()) {
+      CharUnits SSize = Ctx.getTypeSizeInChars(Type->getElementType());
+      if (!SSize.isOne()) {
         diag(SzOfExpr->getBeginLoc(),
              "suspicious usage of 'sizeof' in the loop")
             << SzOfExpr->getSourceRange();