[libcxx-commits] [libcxx] [libc++] P2255R2: Add deleted tuple constructor overloads (PR #205379)

[Nikolas Klauser via libcxx-commits]

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@@ -39,36 +39,63 @@ template <class ...Args>
 void F(typename CannotDeduce<std::tuple<Args...>>::type const&) {}
 
 void f() {
-  // Test that we emit our diagnostic from the library.
+  // Constructing a reference element that would bind to a temporary is rejected. Since C++23
+  // ([tuple.cnstr]) the offending constructors are deleted.
+#if TEST_STD_VER >= 23
+  // expected-error@*:* 8 {{deleted}}
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philnik777 wrote:

IMO we should just disable this test, since this is now SFINAE testable.

https://github.com/llvm/llvm-project/pull/205379