================
@@ -793,3 +794,44 @@ void test13() {
}
} // namespace GH100526
+
+namespace LifetimeboundInterleave {
+
+const std::string& Ref(const std::string& abc [[clang::lifetimebound]]);
+std::string_view test1() {
+ std::string_view t1 = Ref(std::string()); // expected-warning {{object
backing}}
+ t1 = Ref(std::string()); // expected-warning {{object backing}}
+ return Ref(std::string()); // expected-warning {{returning address}}
+}
+
+template <typename T>
+struct Foo {
+ const T& get() const [[clang::lifetimebound]];
+ const T& getNoLB() const;
+};
+std::string_view test2(Foo<std::string> r1, Foo<std::string_view> r2) {
+ std::string_view t1 = Foo<std::string>().get(); // expected-warning {{object
backing}}
+ t1 = Foo<std::string>().get(); // expected-warning {{object backing}}
+ return r1.get(); // expected-warning {{address of stack}}
+
+ std::string_view t2 = Foo<std::string_view>().get();
+ t2 = Foo<std::string_view>().get();
+ return r2.get();
+
+ // no warning on no-LB-annotated method.
+ std::string_view t3 = Foo<std::string>().getNoLB();
+ t3 = Foo<std::string>().getNoLB();
+ return r1.getNoLB();
+}
+
+struct Bar {};
+struct [[gsl::Pointer]] Pointer {
+ Pointer(const Bar & bar [[clang::lifetimebound]]);
+};
+Pointer test3(Bar bar) {
+ Pointer p = Pointer(Bar()); // expected-warning {{temporary}}
+ p = Pointer(Bar()); // expected-warning {{object backing}}
----------------
hokein wrote:
This was a false negative before, this patch also fixes it.
https://github.com/llvm/llvm-project/pull/114044
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