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99dee823 | 1 | // Copyright (C) 2017-2021 Free Software Foundation, Inc. |
af181c91 JW |
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" } | |
7b936140 | 19 | // { dg-do compile { target c++17 } } |
af181c91 JW |
20 | |
21 | #include <functional> | |
22 | ||
23 | template<typename T, typename U> struct require_same; | |
24 | template<typename T> struct require_same<T, T> { using type = void; }; | |
25 | ||
26 | template<typename T, typename U> | |
27 | typename require_same<T, U>::type | |
28 | check_type(U&) { } | |
29 | ||
30 | void f0v(); | |
31 | void f0vn() noexcept; | |
32 | int f0i(); | |
33 | int f0in() noexcept; | |
34 | long f1l(int&); | |
35 | long f1ln(double*) noexcept; | |
36 | ||
37 | void | |
38 | test01() | |
39 | { | |
40 | std::function func1 = f0v; | |
41 | check_type<std::function<void()>>(func1); | |
42 | ||
43 | std::function func2 = f0vn; | |
44 | check_type<std::function<void()>>(func2); | |
45 | ||
46 | std::function func3 = f0i; | |
47 | check_type<std::function<int()>>(func3); | |
48 | ||
49 | std::function func4 = f0in; | |
50 | check_type<std::function<int()>>(func4); | |
51 | ||
52 | std::function func5 = f1l; | |
53 | check_type<std::function<long(int&)>>(func5); | |
54 | ||
55 | std::function func6 = f1ln; | |
56 | check_type<std::function<long(double*)>>(func6); | |
57 | ||
58 | std::function func5a = func5; | |
59 | check_type<std::function<long(int&)>>(func5a); | |
60 | ||
61 | std::function func6a = func6; | |
62 | check_type<std::function<long(double*)>>(func6a); | |
63 | } | |
64 | ||
65 | struct X { | |
66 | int operator()(const short&, void*); | |
67 | }; | |
68 | ||
69 | struct Y { | |
70 | void operator()(int) const & noexcept; | |
71 | }; | |
72 | ||
73 | void | |
74 | test02() | |
75 | { | |
76 | X x; | |
77 | std::function func1 = x; | |
78 | check_type<std::function<int(const short&, void*)>>(func1); | |
79 | ||
80 | Y y; | |
81 | std::function func2 = y; | |
82 | check_type<std::function<void(int)>>(func2); | |
83 | ||
84 | std::function func3 = [&x](float) -> X& { return x; }; | |
85 | check_type<std::function<X&(float)>>(func3); | |
86 | } |