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comparison libstdc++-v3/testsuite/20_util/is_nothrow_constructible/94003.cc @ 152:2b5abeee2509

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update gcc11
author anatofuz
date Mon, 25 May 2020 07:50:57 +0900
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145:1830386684a0 152:2b5abeee2509
1 // Copyright (C) 2020 Free Software Foundation, Inc.
2 //
3 // This file is part of the GNU ISO C++ Library. This library is free
4 // software; you can redistribute it and/or modify it under the
5 // terms of the GNU General Public License as published by the
6 // Free Software Foundation; either version 3, or (at your option)
7 // any later version.
8
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
13
14 // You should have received a copy of the GNU General Public License along
15 // with this library; see the file COPYING3. If not see
16 // <http://www.gnu.org/licenses/>.
17
18 // { dg-options "-std=gnu++17" }
19 // { dg-do compile { target c++17 } }
20
21 #include <optional>
22 #include <tuple>
23
24 template <bool B> struct abc {};
25
26 template <typename T>
27
28 struct future : public abc<std::is_trivially_constructible_v<std::tuple<T>>> {};
29
30 class mutation {
31 mutation();
32 friend class std::optional<mutation>;
33 };
34
35 using mutation_opt = std::optional<mutation>;
36
37 future<mutation_opt> foo();
38
39 template <typename Consumer> future<mutation_opt> consume_partitions() {
40 return foo();
41 }
42
43 future<mutation_opt> bar() { return consume_partitions<int>(); }
44
45 future<mutation> zed();
46 future<mutation> apply_counter_update() { return zed(); }