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From: Jonathan Wakely <jwakely@redhat.com>
Date: Wed, 31 Aug 2022 11:12:56 +0100
Message-ID: <CACb0b4n99Wsmw_yfbRtdz4Ly+coSb85JMJbAW4Kqxb2gRSyDkQ@mail.gmail.com>
Subject: Re: [PATCH 3/3] libstdc++: Implement ranges::zip_view from P2321R2
To: Patrick Palka <ppalka@redhat.com>
Cc: gcc-patches@gcc.gnu.org, libstdc++@gcc.gnu.org
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On Fri, 26 Aug 2022 at 21:05, Jonathan Wakely wrote:
>
> On Tue, 23 Aug 2022 at 02:38, Patrick Palka via Libstdc++
> <libstdc++@gcc.gnu.org> wrote:
> > +    template<typename _Fp, typename _Tuple>
> > +      constexpr void
> > +      __tuple_for_each(_Fp&& __f, _Tuple&& __tuple)
> > +      {
> > +       std::apply([&]<typename... _Ts>(_Ts&&... __elts) {
> > +         (std::__invoke(__f, std::forward<_Ts>(__elts)), ...);
> > +       }, std::forward<_Tuple>(__tuple));
>
>
> Nicole Mazzuca noticed a problem with the definition of
> tuple-for-each, which I've just added to the issues list:
> https://cplusplus.github.io/LWG/issue3755

Ignore this. The __tuple_for_each function is only ever called by the
library, so there's no way for something like Evil to be passed to it.