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From: "vofogi5810 at goonby dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/104509] New: Scoped enum as bit field in a function template Date: Sat, 12 Feb 2022 03:06:53 +0000 [thread overview] Message-ID: <bug-104509-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104509 Bug ID: 104509 Summary: Scoped enum as bit field in a function template Product: gcc Version: 11.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: vofogi5810 at goonby dot com Target Milestone: --- The following fails: #include <cassert> struct test { enum class state { off, on }; state st: 1; // bit field bool is_on() const { return st == state::on; // this is ok } template<bool flag> bool is() const { if constexpr (flag) return st == state::on; // error? else return st == state::off; } }; int main() { test t{test::state::on}; return !t.is<true>(); } GCC output: error: no match for ‘operator==’ (operand types are ‘const signed char:1’ and ‘test::state’) Non-template function works. Current workaround is to apply static_cast.
next reply other threads:[~2022-02-12 3:06 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-02-12 3:06 vofogi5810 at goonby dot com [this message] 2022-02-12 3:11 ` [Bug c++/104509] " pinskia at gcc dot gnu.org
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