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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/114395] [c++20+] std::is_constructible_v result of const
 reference incorrect
Date: Tue, 19 Mar 2024 16:28:54 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114395

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Except this works with C++20+ for GCC:
```
struct A {
    int a;
};
struct B : public A {};

void f(const A &a)
{
        typedef const B & Btype;
        Btype b(a);
}

```=