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From: Jelte Fennema-Nio <[email protected]>
To: Peter Eisentraut <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Cc: Thomas Munro <[email protected]>
Subject: Re: Make copyObject work in C++
Date: Tue, 9 Dec 2025 13:58:40 +0100
Message-ID: <CAGECzQSgRGRRHt4BVhMLpxrXMGDGzFLk3d=rnC7ye2kNibc-AQ@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <CAGECzQR21OnnKiZO_1rLWO0-16kg1JBxnVq-wymYW0-_1cUNtg@mail.gmail.com>
	<[email protected]>

On Mon, 8 Dec 2025 at 08:57, Peter Eisentraut <[email protected]> wrote:
> In the long run, I would like to change copyObject() to use
> typeof_unqual instead, because that handles qualifiers more correctly.
> (Currently, copyObject() of a const-qualified pointer results in a
> const-qualified pointer, which is nonsensical because the reason you
> made the copy is that you can modify it.)  See attached patch for an
> example.  Does C++ have something that is semantically similar to that?

Yes, there's a std::remove_cv, std::remove_const, and std::remove_volatile[1].

[1]: https://en.cppreference.com/w/cpp/types/remove_cv.html

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