https://github.com/zeyi2 created https://github.com/llvm/llvm-project/pull/165636
Fix issue in readability-container-data-pointer when the container expression is a dereference (e.g., `&(*p)[0]`). The previous fix-it suggested `*p.data()`, which changes semantics because `.` binds tighter than `*`. The fix now correctly suggests `(*p).data()`. Closes [#164852](https://github.com/llvm/llvm-project/issues/164852) >From f29accd639928c3560309a15bf42e81b65e5b20f Mon Sep 17 00:00:00 2001 From: mtx <[email protected]> Date: Thu, 30 Oct 2025 02:56:11 +0800 Subject: [PATCH] [clang-tidy] Fix `readability-container-data-pointer` check --- .../readability/ContainerDataPointerCheck.cpp | 7 +++++-- .../checkers/readability/container-data-pointer.cpp | 12 ++++++++++++ 2 files changed, 17 insertions(+), 2 deletions(-) diff --git a/clang-tools-extra/clang-tidy/readability/ContainerDataPointerCheck.cpp b/clang-tools-extra/clang-tidy/readability/ContainerDataPointerCheck.cpp index 11756d10a8221..d9338888cc40e 100644 --- a/clang-tools-extra/clang-tidy/readability/ContainerDataPointerCheck.cpp +++ b/clang-tools-extra/clang-tidy/readability/ContainerDataPointerCheck.cpp @@ -107,8 +107,11 @@ void ContainerDataPointerCheck::check(const MatchFinder::MatchResult &Result) { Lexer::getSourceText(CharSourceRange::getTokenRange(SrcRange), *Result.SourceManager, getLangOpts())}; - if (!isa<DeclRefExpr, ArraySubscriptExpr, CXXOperatorCallExpr, CallExpr, - MemberExpr>(CE)) + const auto *OpCall = dyn_cast<CXXOperatorCallExpr>(CE); + bool NeedsParens = + OpCall ? (OpCall->getOperator() != OO_Subscript) + : !isa<DeclRefExpr, MemberExpr, ArraySubscriptExpr, CallExpr>(CE); + if (NeedsParens) ReplacementText = "(" + ReplacementText + ")"; if (CE->getType()->isPointerType()) diff --git a/clang-tools-extra/test/clang-tidy/checkers/readability/container-data-pointer.cpp b/clang-tools-extra/test/clang-tidy/checkers/readability/container-data-pointer.cpp index a8e0eb6d262e6..26f9d9f16ac8c 100644 --- a/clang-tools-extra/test/clang-tidy/checkers/readability/container-data-pointer.cpp +++ b/clang-tools-extra/test/clang-tidy/checkers/readability/container-data-pointer.cpp @@ -35,6 +35,12 @@ template <typename T> struct enable_if<true, T> { typedef T type; }; + +template <typename T> +struct unique_ptr { + T &operator*() const; + T *operator->() const; +}; } template <typename T> @@ -144,3 +150,9 @@ int *r() { // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: 'data' should be used for accessing the data pointer instead of taking the address of the 0-th element [readability-container-data-pointer] // CHECK-FIXES: return holder.v.data(); } + +void s(std::unique_ptr<std::vector<unsigned char>> p) { + f(&(*p)[0]); + // CHECK-MESSAGES: :[[@LINE-1]]:5: warning: 'data' should be used for accessing the data pointer instead of taking the address of the 0-th element [readability-container-data-pointer] + // CHECK-FIXES: f((*p).data()); +} _______________________________________________ cfe-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
