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From: "f.heckenbach@fh-soft.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/94061] defaulted member operator <=> defined as deleted if a base has protected member operator <=>
Date: Sat, 08 Jan 2022 21:59:10 +0000	[thread overview]
Message-ID: <bug-94061-4-53YLbYTz9R@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-94061-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94061

--- Comment #3 from Frank Heckenbach <f.heckenbach@fh-soft.de> ---
(In reply to Patrick Palka from comment #2)
> How do you define it?  It works if we define it as
> 
>   auto operator <=> (const B& b) const {
>     return A::operator<=>(b);
>   }
> 
> but not if it's defined as
> 
>   auto operator <=> (const B& b) const {
>     return static_cast<const A&>(*this) <=> static_cast<const A&>(b);
>   }

I'd do the former. I don't know what the standard says exactly, but intuitively
it seems to me that "protected" should suffice, also by comparison with
constructors.

  parent reply	other threads:[~2022-01-08 21:59 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <bug-94061-4@http.gcc.gnu.org/bugzilla/>
2022-01-08  1:06 ` f.heckenbach@fh-soft.de
2022-01-08 16:35 ` ppalka at gcc dot gnu.org
2022-01-08 21:59 ` f.heckenbach@fh-soft.de [this message]
2022-04-12  9:07 ` feildel+gccbugzilla@corona-renderer.com
2024-04-24  7:42 ` gcc-90 at tbilles dot hu
2024-04-24 21:31 ` ppalka at gcc dot gnu.org
2024-04-24 21:32 ` ppalka at gcc dot gnu.org

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