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From: "ppalka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/103924] views::join combined with std::string cannot
 be used in constant expressions
Date: Fri, 29 Mar 2024 21:21:17 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103924

--- Comment #3 from Patrick Palka <ppalka at gcc dot gnu.org> ---
>From PR114530:

#include <ranges>
#include <vector>

static_assert(
  std::ranges::distance(
      std::views::single(std::views::cartesian_product(std::string{}))
    | std::views::join
  ) =3D=3D 0
);=