[Bug libstdc++/121956] New: P2165R4: Compatibility between tuple and tuple-like objects is not fully implemented

[hewillk at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121956

            Bug ID: 121956
           Summary: P2165R4: Compatibility between tuple and tuple-like
                    objects is not fully implemented
           Product: gcc
           Version: 15.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hewillk at gmail dot com
  Target Milestone: ---

#include <vector>
#include <ranges>

int main() {
  std::vector v{1, 2, 3, 4};
  auto r = v | std::views::pairwise;
  static_assert(
    std::is_same_v<
      std::ranges::range_value_t<decltype(r)>, 
      std::tuple<int, int>
    >);
}

https://godbolt.org/z/s865x5MrM