[clang-tools-extra] [clang-tidy] Add readability-redundant-lambda-parentheses check (PR #190438)

via cfe-commits cfe-commits at lists.llvm.org
Sat Apr 4 09:31:19 PDT 2026


github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


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<summary>
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``````````bash
git-clang-format --diff origin/main HEAD --extensions h,cpp -- clang-tools-extra/clang-tidy/readability/RedundantLambdaParenthesesCheck.cpp clang-tools-extra/clang-tidy/readability/RedundantLambdaParenthesesCheck.h clang-tools-extra/test/clang-tidy/checkers/readability/redundant-lambda-parentheses-cxx20.cpp clang-tools-extra/test/clang-tidy/checkers/readability/redundant-lambda-parentheses-cxx23.cpp clang-tools-extra/test/clang-tidy/checkers/readability/redundant-lambda-parentheses.cpp clang-tools-extra/clang-tidy/readability/ReadabilityTidyModule.cpp --diff_from_common_commit
``````````

:warning:
The reproduction instructions above might return results for more than one PR
in a stack if you are using a stacked PR workflow. You can limit the results by
changing `origin/main` to the base branch/commit you want to compare against.
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<details>
<summary>
View the diff from clang-format here.
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``````````diff
diff --git a/clang-tools-extra/clang-tidy/readability/RedundantLambdaParenthesesCheck.cpp b/clang-tools-extra/clang-tidy/readability/RedundantLambdaParenthesesCheck.cpp
index 938ca0622..45f861a5e 100644
--- a/clang-tools-extra/clang-tidy/readability/RedundantLambdaParenthesesCheck.cpp
+++ b/clang-tools-extra/clang-tidy/readability/RedundantLambdaParenthesesCheck.cpp
@@ -32,18 +32,17 @@ AST_MATCHER(clang::LambdaExpr, isGenericLambdaInCxx20OrLater) {
 namespace clang::tidy::readability {
 
 void RedundantLambdaParenthesesCheck::registerMatchers(MatchFinder *Finder) {
-  Finder->addMatcher(
-      lambdaExpr(hasExplicitOrGenericParameters(), hasNoParameters(),
-                 isGenericLambdaInCxx20OrLater())
-          .bind("lambda"),
-      this);
+  Finder->addMatcher(lambdaExpr(hasExplicitOrGenericParameters(),
+                                hasNoParameters(),
+                                isGenericLambdaInCxx20OrLater())
+                         .bind("lambda"),
+                     this);
 }
 
 void RedundantLambdaParenthesesCheck::check(
     const MatchFinder::MatchResult &Result) {
   const auto *Lambda = Result.Nodes.getNodeAs<LambdaExpr>("lambda");
 
-
   if (Lambda->getBeginLoc().isMacroID())
     return;
 
@@ -54,9 +53,8 @@ void RedundantLambdaParenthesesCheck::check(
           ? Lexer::getLocForEndOfToken(
                 Lambda->getTemplateParameterList()->getRAngleLoc(), 0,
                 *Result.SourceManager, LangOpts)
-          : Lexer::getLocForEndOfToken(
-                Lambda->getIntroducerRange().getEnd(), 0,
-                *Result.SourceManager, LangOpts);
+          : Lexer::getLocForEndOfToken(Lambda->getIntroducerRange().getEnd(), 0,
+                                       *Result.SourceManager, LangOpts);
 
   Token Tok;
   if (Lexer::getRawToken(ScanFrom, Tok, *Result.SourceManager, LangOpts,
diff --git a/clang-tools-extra/clang-tidy/readability/RedundantLambdaParenthesesCheck.h b/clang-tools-extra/clang-tidy/readability/RedundantLambdaParenthesesCheck.h
index 0dfce17cc..2f2a716de 100644
--- a/clang-tools-extra/clang-tidy/readability/RedundantLambdaParenthesesCheck.h
+++ b/clang-tools-extra/clang-tidy/readability/RedundantLambdaParenthesesCheck.h
@@ -22,7 +22,7 @@ class RedundantLambdaParenthesesCheck : public ClangTidyCheck {
 public:
   RedundantLambdaParenthesesCheck(StringRef Name, ClangTidyContext *Context)
       : ClangTidyCheck(Name, Context) {}
-  
+
   std::optional<TraversalKind> getCheckTraversalKind() const override {
     return TK_IgnoreUnlessSpelledInSource;
   }

``````````

</details>


https://github.com/llvm/llvm-project/pull/190438


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