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1 | // { dg-options "-std=gnu++17" } |
2 | // { dg-do compile { target c++17 } } | |
3 | ||
8d9254fc | 4 | // Copyright (C) 2019-2020 Free Software Foundation, Inc. |
74fda2dc JW |
5 | // |
6 | // This file is part of the GNU ISO C++ Library. This library is free | |
7 | // software; you can redistribute it and/or modify it under the | |
8 | // terms of the GNU General Public License as published by the | |
9 | // Free Software Foundation; either version 3, or (at your option) | |
10 | // any later version. | |
11 | ||
12 | // This library is distributed in the hope that it will be useful, | |
13 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | // GNU General Public License for more details. | |
16 | ||
17 | // You should have received a copy of the GNU General Public License along | |
18 | // with this library; see the file COPYING3. If not see | |
19 | // <http://www.gnu.org/licenses/>. | |
20 | ||
21 | // C++17 29.8.3 [reduce] | |
22 | ||
23 | #include <numeric> | |
24 | #include <iterator> | |
25 | #include <testsuite_hooks.h> | |
26 | #include <testsuite_iterators.h> | |
27 | ||
28 | struct T | |
29 | { | |
30 | T(int); | |
31 | T(T&&); // MoveConstructible | |
32 | T& operator=(T&&); // not required by the standard, but it needs to be | |
33 | T operator+(const T&) const; | |
34 | }; | |
35 | ||
36 | void | |
37 | test01() | |
38 | { | |
39 | T t[1]{1}; | |
40 | std::reduce(t, t+1, T(0)); | |
41 | ||
42 | using __gnu_test::test_container; | |
43 | using __gnu_test::input_iterator_wrapper; | |
44 | test_container<T, input_iterator_wrapper> con(t); | |
45 | std::reduce(con.begin(), con.end(), T(0)); | |
46 | } | |
47 | ||
48 | struct Op | |
49 | { | |
50 | T operator()(T&, T&) const&; | |
51 | ||
52 | // The standard does *not* require invoking as an rvalue to be supported. | |
53 | T operator()(T&, T&) && = delete; | |
54 | ||
55 | // The standard does *not* require rvalue arguments to be supported | |
56 | // (this is almost certainly a defect and should be allowed). | |
57 | T operator()(T&&, T&&) const = delete; | |
58 | }; | |
59 | ||
60 | void | |
61 | test02() | |
62 | { | |
63 | T t[1]{1}; | |
64 | std::reduce(t, t+1, T(0), Op()); | |
65 | ||
66 | using __gnu_test::test_container; | |
67 | using __gnu_test::input_iterator_wrapper; | |
68 | test_container<T, input_iterator_wrapper> con(t); | |
69 | std::reduce(con.begin(), con.end(), T(0), Op()); | |
70 | } |