On Fri, Oct 24, 2025 at 6:09 PM Matthias Kretz <[email protected]> wrote:
> Tomasz Kaminski [Friday, 24 October 2025, 17:40:40 CEST]:
> > > #endif // __glibcxx_integer_sequence
> > >
> > > +#if __cpp_structured_bindings >= 202411L
> > > +#if __has_builtin(__integer_pack)
> > > + template <auto _Num, typename _Tp = decltype(_Num)>
> > > + inline constexpr _Tp
> > > + _IotaArray[_Num] = {__integer_pack(_Tp(_Num))...};
> > > +#else
> >
> > This should be #elif __glibcxx_integer_sequence, we dependent on that.,
> > Otherwise this looks good to me.
>
> But then, shouldn't I rather move the `#endif //
> __glibcxx_integer_sequence`
> from above below my code?
>
> BTW, this is also useful/necessary for expansion statements:
>
> template for (constexpr int __i : _IotaArray<10>)
>
I can simply use views::iota here, I do not need to materialize array for
that.
> ...;
>
> So rather guard it with the following?
>
> __cpp_structured_bindings >= 202411L || __cpp_expansion_statements >=
> 202506L
>
> - Matthias
>
> --
> ──────────────────────────────────────────────────────────────────────────
> Dr. Matthias Kretz https://mattkretz.github.io
> GSI Helmholtz Center for Heavy Ion Research https://gsi.de
> std::simd
> ──────────────────────────────────────────────────────────────────────────
>
