public inbox for gcc-cvs@sourceware.org help / color / mirror / Atom feed
From: Marek Polacek <mpolacek@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc r13-5692] c++: Add fixed test [PR101071] Date: Fri, 3 Feb 2023 18:50:26 +0000 (GMT) [thread overview] Message-ID: <20230203185026.D04393858D20@sourceware.org> (raw) https://gcc.gnu.org/g:60fca1802a25034f49fa1e3769b3a5656f392e89 commit r13-5692-g60fca1802a25034f49fa1e3769b3a5656f392e89 Author: Marek Polacek <polacek@redhat.com> Date: Fri Feb 3 13:45:10 2023 -0500 c++: Add fixed test [PR101071] As a happy accident, this was fixed by the recent r13-2978. PR c++/101071 gcc/testsuite/ChangeLog: * g++.dg/cpp0x/variadic-alias8.C: New test. Diff: --- gcc/testsuite/g++.dg/cpp0x/variadic-alias8.C | 95 ++++++++++++++++++++++++++++ 1 file changed, 95 insertions(+) diff --git a/gcc/testsuite/g++.dg/cpp0x/variadic-alias8.C b/gcc/testsuite/g++.dg/cpp0x/variadic-alias8.C new file mode 100644 index 00000000000..1d317ef8438 --- /dev/null +++ b/gcc/testsuite/g++.dg/cpp0x/variadic-alias8.C @@ -0,0 +1,95 @@ +// PR c++/101071 +// { dg-do compile { target c++11 } } +// { dg-additional-options "-fno-elide-constructors -O2" } + +// Like variadic-alias2.C, just different options. + +template<class...> +struct list {}; + +struct nil; + +//////////////////////////////////////////////////////////////////////////////// + +template<int n> +struct number { + constexpr /*implicit*/ operator int() const { return n; } + using type = number<n>; +}; + +using false_ = number<0>; +using true_ = number<1>; + +static_assert(!false_{}, ""); +static_assert(true_{}, ""); + +template<int... ns> using numbers = list<number<ns>...>; + +//////////////////////////////////////////////////////////////////////////////// + +template<class lhs, class rhs> +struct less_impl; + +template<int lhs, int rhs> +struct less_impl<number<lhs>, number<rhs>> + : number<(lhs < rhs)> {}; + +template<class lhs, class rhs> using less = typename less_impl<lhs, rhs>::type; + +//////////////////////////////////////////////////////////////////////////////// + +template<class v0, class... vs> +struct sum_impl { + static_assert(sizeof...(vs) == 0, "see specialization"); + using type = v0; +}; + +template<int v0, int v1, class... vs> +struct sum_impl<number<v0>, number<v1>, vs...> + : sum_impl<number<v0 + v1>, vs...> {}; + +template<class... nums> using sum = typename sum_impl<nums...>::type; + +//////////////////////////////////////////////////////////////////////////////// + +template<class num> +struct conditional_impl { + static_assert(num{}, "see specialization"); + + template<class T, class F> + using type = T; +}; + +template<> +struct conditional_impl<false_> { + template<class T, class F> + using type = F; +}; + +template<class num, class T, class F> +using conditional = typename conditional_impl<num>::template type<T, F>; + +//////////////////////////////////////////////////////////////////////////////// + +template<class seq> +struct min_filter_impl; + +template<class... nums> +struct min_filter_impl<list<nums...>> { + template<class num> + using count_better_mins = sum<less<nums, num>...>; + + using type = list<conditional<count_better_mins<nums>, nil, nums>...>; +}; + +template<class seq> using min_filter = typename min_filter_impl<seq>::type; + +//////////////////////////////////////////////////////////////////////////////// + +void test_min_filter() { + using computed = min_filter<numbers<2, 7, 2>>; + using expected = list<number<2>, nil, number<2>>; + (void)(computed{} = expected{});// compiles for identical types +} + +int main() {}
reply other threads:[~2023-02-03 18:50 UTC|newest] Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20230203185026.D04393858D20@sourceware.org \ --to=mpolacek@gcc.gnu.org \ --cc=gcc-cvs@gcc.gnu.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).