[PATCH] libstdc++: Implement LWG 3555 changes to transform/elements_view

[Jonathan Wakely]

On Fri, 18 Jun 2021 at 05:04, Patrick Palka via Libstdc++
<libstdc++@gcc.gnu.org> wrote:
>
> libstdc++-v3/ChangeLog:
>
>         * include/std/ranges (transform_view::_Iterator::_S_iter_concept):
>         Consider _Base instead of _Vp as per LWG 3555.
>         (elements_view::_Iterator::_S_iter_concept): Likewise.

OK

> ---
>  libstdc++-v3/include/std/ranges | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/libstdc++-v3/include/std/ranges b/libstdc++-v3/include/std/ranges
> index f93a880ff8a..bf85b1629f0 100644
> --- a/libstdc++-v3/include/std/ranges
> +++ b/libstdc++-v3/include/std/ranges
> @@ -1613,11 +1613,11 @@ namespace views::__adaptor
>           static auto
>           _S_iter_concept()
>           {
> -           if constexpr (random_access_range<_Vp>)
> +           if constexpr (random_access_range<_Base>)
>               return random_access_iterator_tag{};
> -           else if constexpr (bidirectional_range<_Vp>)
> +           else if constexpr (bidirectional_range<_Base>)
>               return bidirectional_iterator_tag{};
> -           else if constexpr (forward_range<_Vp>)
> +           else if constexpr (forward_range<_Base>)
>               return forward_iterator_tag{};
>             else
>               return input_iterator_tag{};
> @@ -3659,11 +3659,11 @@ namespace views::__adaptor
>           static auto
>           _S_iter_concept()
>           {
> -           if constexpr (random_access_range<_Vp>)
> +           if constexpr (random_access_range<_Base>)
>               return random_access_iterator_tag{};
> -           else if constexpr (bidirectional_range<_Vp>)
> +           else if constexpr (bidirectional_range<_Base>)
>               return bidirectional_iterator_tag{};
> -           else if constexpr (forward_range<_Vp>)
> +           else if constexpr (forward_range<_Base>)
>               return forward_iterator_tag{};
>             else
>               return input_iterator_tag{};
> --
> 2.32.0.93.g670b81a890
>