https://github.com/flovent created
https://github.com/llvm/llvm-project/pull/141391
Fixes #141381.
Add check for `DeclRefExpr` which points to an explicit object parameter.
>From 3a7260050f8e8dc271c7fe2a5ec937026136fb6b Mon Sep 17 00:00:00 2001
From: fubowen <fubo...@protomail.com>
Date: Sun, 25 May 2025 09:37:47 +0800
Subject: [PATCH] [clang-tidy] fix false positives with deducing this in
`readability-convert-member-functions-to-static` check
---
.../readability/ConvertMemberFunctionsToStatic.cpp | 10 ++++++++++
clang-tools-extra/docs/ReleaseNotes.rst | 4 ++++
...rt-member-functions-to-static-deducing-this.cpp | 14 ++++++++++++++
3 files changed, 28 insertions(+)
create mode 100644
clang-tools-extra/test/clang-tidy/checkers/readability/convert-member-functions-to-static-deducing-this.cpp
diff --git
a/clang-tools-extra/clang-tidy/readability/ConvertMemberFunctionsToStatic.cpp
b/clang-tools-extra/clang-tidy/readability/ConvertMemberFunctionsToStatic.cpp
index 1284df6bd99cf..5cdd00414e01e 100644
---
a/clang-tools-extra/clang-tidy/readability/ConvertMemberFunctionsToStatic.cpp
+++
b/clang-tools-extra/clang-tidy/readability/ConvertMemberFunctionsToStatic.cpp
@@ -62,6 +62,16 @@ AST_MATCHER(CXXMethodDecl, usesThis) {
return false; // Stop traversal.
}
+ bool VisitDeclRefExpr(const DeclRefExpr *E) {
+ if (const auto *PVD = dyn_cast_if_present<ParmVarDecl>(E->getDecl());
+ PVD && PVD->isExplicitObjectParameter()) {
+ Used = true;
+ return false; // Stop traversal.
+ }
+
+ return true;
+ }
+
// If we enter a class declaration, don't traverse into it as any usages of
// `this` will correspond to the nested class.
bool TraverseCXXRecordDecl(CXXRecordDecl *RD) { return true; }
diff --git a/clang-tools-extra/docs/ReleaseNotes.rst
b/clang-tools-extra/docs/ReleaseNotes.rst
index 8611b5e0af272..a138272cc8e39 100644
--- a/clang-tools-extra/docs/ReleaseNotes.rst
+++ b/clang-tools-extra/docs/ReleaseNotes.rst
@@ -234,6 +234,10 @@ Changes in existing checks
tolerating fix-it breaking compilation when functions is used as pointers
to avoid matching usage of functions within the current compilation unit.
+- Improved :doc:`readability-convert-member-functions-to-static
+ <clang-tidy/checks/readability/convert-member-functions-to-static>` check by
+ fixing false positives on member functions with an explicit object parameter.
+
Removed checks
^^^^^^^^^^^^^^
diff --git
a/clang-tools-extra/test/clang-tidy/checkers/readability/convert-member-functions-to-static-deducing-this.cpp
b/clang-tools-extra/test/clang-tidy/checkers/readability/convert-member-functions-to-static-deducing-this.cpp
new file mode 100644
index 0000000000000..bb9755abc9cfa
--- /dev/null
+++
b/clang-tools-extra/test/clang-tidy/checkers/readability/convert-member-functions-to-static-deducing-this.cpp
@@ -0,0 +1,14 @@
+// RUN: %check_clang_tidy -std=c++23 %s
readability-convert-member-functions-to-static %t
+
+namespace std{
+ class string {};
+ void println(const char *format, const std::string &str) {}
+}
+
+namespace PR141381 {
+struct Hello {
+ std::string str_;
+
+ void hello(this Hello &self) { std::println("Hello, {0}!", self.str_); }
+};
+}
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