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From: "xry111 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/110401] New: Unhelpful "goto is not a constant expression" in ill-formed constexpr function template Date: Sun, 25 Jun 2023 08:56:41 +0000 [thread overview] Message-ID: <bug-110401-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110401 Bug ID: 110401 Summary: Unhelpful "goto is not a constant expression" in ill-formed constexpr function template Product: gcc Version: 14.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: xry111 at gcc dot gnu.org Target Milestone: --- #include <array> template <int N> constexpr std::array<int, N> get_sqr() { std::array<int, N> ret; for (int i = 0; i < N; i++) ret[i] = i * i; return ret; } constexpr auto sqr = get_sqr<10000>(); GCC says "error: 'goto' is not a constant expression". This is puzzling because there is no "goto" in the function. Note that if it's not a template, GCC outputs the correct message: #include <array> constexpr std::array<int, 10000> get_sqr() { std::array<int, 10000> ret; for (int i = 0; i < 10000; i++) ret[i] = i * i; return ret; } constexpr auto sqr = get_sqr(); t.cc: In function 'constexpr std::array<int, 10000> get_sqr()': t.cc:5:28: error: uninitialized variable 'ret' in 'constexpr' function 5 | std::array<int, 10000> ret; | ^~~
next reply other threads:[~2023-06-25 8:56 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-06-25 8:56 xry111 at gcc dot gnu.org [this message] 2023-06-25 13:15 ` [Bug c++/110401] [10/11/12/13/14 Regression] Unhelpful "goto is not a constant expression" in ill-formed pre c++20 " pinskia at gcc dot gnu.org 2023-07-07 10:45 ` [Bug c++/110401] [11/12/13/14 " rguenth at gcc dot gnu.org 2024-03-22 13:43 ` law at gcc dot gnu.org
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