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[clang] Add a lifetime_capture_by testcase for temporary capturing object. #117733

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Nov 28, 2024
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[clang] Add a lifetime_capture_by testcase for temporary capturing object. #117733

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14 changes: 14 additions & 0 deletions clang/test/Sema/warn-lifetime-analysis-capture-by.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -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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