https://github.com/hokein updated
https://github.com/llvm/llvm-project/pull/117733
>From 30235e403de2130795201b00e2d23e25cdb68baa Mon Sep 17 00:00:00 2001
From: Haojian Wu <hokein...@gmail.com>
Date: Tue, 26 Nov 2024 17:14:49 +0100
Subject: [PATCH] [clang] Add a lifetime capture testcase for temporary
capturing object.
---
.../Sema/warn-lifetime-analysis-capture-by.cpp | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/clang/test/Sema/warn-lifetime-analysis-capture-by.cpp
b/clang/test/Sema/warn-lifetime-analysis-capture-by.cpp
index 4d562bac1e305b..e867296d6d8ea7 100644
--- a/clang/test/Sema/warn-lifetime-analysis-capture-by.cpp
+++ b/clang/test/Sema/warn-lifetime-analysis-capture-by.cpp
@@ -143,6 +143,20 @@ void use() {
}
} // namespace this_is_captured
+namespace temporary_capturing_object {
+struct S {
+ void add(const int& x [[clang::lifetime_capture_by(this)]]);
+};
+
+void test() {
+ // We still give an warning even the capturing object is a temoprary.
+ // It is possible that the capturing object uses the captured object in its
+ // destructor.
+ S().add(1); // expected-warning {{object whose reference is captured}}
+ S{}.add(1); // expected-warning {{object whose reference is captured}}
+}
+} // namespace ignore_temporary_class_object
+
// ****************************************************************************
// Capture by Global and Unknown.
// ****************************************************************************
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