[RFC] Minimize functor copy in algos

[Jonathan Wakely]

On Mon, 25 May 2026 at 20:54, François Dumont <frs.dumont@gmail.com> wrote:
>
> In my attempt to rewrite predefined ops was also an attempt to improve
> how the functor were passed within implementation details of the
> different algos.
>
> https://gcc.gnu.org/pipermail/libstdc++/2024-October/059677.html
>
> As it seems to be a hot subject lately I rebased it and proposing it here.
>
> Even if Nathan Myers approach to work on 1 algo at a time is also a good
> approach.
>
> There are still some occasions where the functor is passed by copy, when
> building __gnu_cxx::_ops functors, I'm going to have a look at it.

Again, I don't want to change to pass-by-reference, I just want use to
use _GLIBCXX_MOVE in the callers.

I guess I can just do it myself.


>
> Let me know if I should leave it to Nathan Myers.
>
> François
>
>