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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/110512] C++20 random access iterators run
 sequentially with PSTL
Date: Tue, 09 Jan 2024 23:38:24 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110512

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Actually, if we don't care about upstream any more, we can improve the
pre-C++20 version too:

template <typename... _IteratorTypes>
using __are_random_access_iterators
    =3D std::__or_<std::is_base_of<std::random_access_iterator_tag,
                                 std::__iter_category_t<_IteratorTypes>>...=
>;=