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From: "cerrigno at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/102928] New: Template argument deduction when mixing variadic template with C-style variadic function Date: Mon, 25 Oct 2021 12:29:33 +0000 [thread overview] Message-ID: <bug-102928-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102928 Bug ID: 102928 Summary: Template argument deduction when mixing variadic template with C-style variadic function Product: gcc Version: 11.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: cerrigno at gmail dot com Target Milestone: --- GCC fails to deduce template arguments when mixing variadic template with C-style variadic function. This code compiles fine on clang, MSVC and ICC. ``` template <typename... Args> constexpr auto foo(Args&& ...args, ...) noexcept { return sizeof...(args); } constexpr auto bar() noexcept { return foo<int>(1, 2); } static_assert(bar() == 2, ""); ``` but on GCC bar() returns 1. Even if not so clear on the standard, the correct output should be 2. More information can be found on this answer on StackOverflow: https://stackoverflow.com/a/69700603/3287591 See also this sandbox on Compiler Explorer: https://godbolt.org/z/e5v74n6fE
next reply other threads:[~2021-10-25 12:29 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-10-25 12:29 cerrigno at gmail dot com [this message] 2021-11-06 22:10 ` [Bug c++/102928] " pinskia at gcc dot gnu.org
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