[Bug c++/117509] False negative on -Wdangling-reference

[mpolacek at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117509

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mpolacek at gcc dot gnu.org

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
This suppresses the warning for me:

--- 117509.C    2024-11-19 15:24:47.447035585 -0500
+++ 117509-2.C  2024-11-19 15:25:05.041046272 -0500
@@ -3,7 +3,7 @@ struct Optional {
     union { T v; };
     bool flag;

-    [[nodiscard]] auto value() && -> T&& { return (T&&)v; }
+    [[nodiscard, gnu::no_dangling]] auto value() && -> T&& { return (T&&)v; }
     [[nodiscard]] auto operator*() && -> T&& { return (T&&)v; }
 };