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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/107085] __reference_constructs_from_temporary does not
 detect static up-cast
Date: Thu, 29 Sep 2022 10:46:47 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107085

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |INVALID
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
#include <type_traits>
using namespace std;
struct Base {};
struct Derived : Base {};
static_assert( conjunction_v<is_reference<Base&>, is_constructible<Base&,
Derived>> );

This fails (as expected) and so the reference_constructs_from_temporary is
required to be false.=