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From: "hewillk at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/111717] syntax error When CTAD encounters complex alias template Date: Fri, 06 Oct 2023 16:35:49 +0000 [thread overview] Message-ID: <bug-111717-4-VpkzWTiKgt@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-111717-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111717 --- Comment #1 from 康桓瑋 <hewillk at gmail dot com> --- #include <utility> namespace std { constexpr size_t dynamic_extent = -1; template<class IndexType, size_t... Extents> class extents { }; template<class IndexType, size_t Rank> using dextents = decltype([]<size_t... Is>(index_sequence<Is...>) { return extents<IndexType, ((void)Is, dynamic_extent)...>{}; }(make_index_sequence<Rank>{})); // this works well static_assert(std::is_same_v< dextents<int, 3>, extents<int, dynamic_extent, dynamic_extent, dynamic_extent>> ); template<class ElementType, class Extents> class mdspan { template<class Ptr, class... Integrals> explicit mdspan(Ptr ptr, Integrals... exts); }; template<class ElementType, class... Integrals> explicit mdspan(ElementType*, Integrals...) ->mdspan<ElementType, dextents<size_t, sizeof...(Integrals)>>; } https://godbolt.org/z/E45dcb4G8
next prev parent reply other threads:[~2023-10-06 16:35 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-10-06 16:35 [Bug c++/111717] New: " hewillk at gmail dot com 2023-10-06 16:35 ` hewillk at gmail dot com [this message] 2023-10-06 16:56 ` [Bug c++/111717] " pinskia at gcc dot gnu.org 2024-04-13 8:29 ` pinskia at gcc dot gnu.org
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