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6458742a | 1 | // { dg-do compile { target c++17 } } |
25a69162 | 2 | |
7adcbafe | 3 | // Copyright (C) 2016-2022 Free Software Foundation, Inc. |
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4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the | |
7 | // terms of the GNU General Public License as published by the | |
8 | // Free Software Foundation; either version 3, or (at your option) | |
9 | // any later version. | |
10 | ||
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | ||
c7cbb4da | 16 | // You should have received a copy of the GNU General Public License along |
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17 | // with this library; see the file COPYING3. If not see |
18 | // <http://www.gnu.org/licenses/>. | |
19 | ||
20 | #include <utility> | |
21 | #include <type_traits> | |
22 | #include <testsuite_hooks.h> | |
23 | ||
24 | using std::in_place_t; | |
25 | using std::in_place_type_t; | |
26 | using std::in_place_index_t; | |
27 | ||
28 | float f(in_place_type_t<float>); | |
29 | double f(in_place_type_t<double>); | |
30 | char f(in_place_index_t<0>); | |
31 | unsigned int f(in_place_index_t<1>); | |
32 | int f(in_place_t); | |
33 | ||
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34 | static_assert(std::is_same<decltype(f(std::in_place)), int>::value); |
35 | static_assert(std::is_same<decltype(f(std::in_place_type<float>)), | |
36 | float>::value); | |
37 | static_assert(std::is_same<decltype(f(std::in_place_type<double>)), | |
38 | double>::value); | |
39 | static_assert(std::is_same<decltype(f(std::in_place_index<0>)), char>::value); | |
40 | static_assert(std::is_same<decltype(f(std::in_place_index<1>)), | |
41 | unsigned int>::value); | |
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42 | |
43 | template <class T, class... Args> float h(in_place_type_t<T>, Args&&...); | |
44 | template <size_t N, class... Args> int h(in_place_index_t<N>, Args&&...); | |
45 | template <class T> double h(in_place_t, T&&); | |
46 | ||
47 | static_assert(std::is_same<decltype(h(std::in_place, 1)), double>::value); | |
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48 | static_assert(std::is_same<decltype(h(std::in_place_type<float>, 1)), |
49 | float>::value); | |
50 | static_assert(std::is_same<decltype(h(std::in_place_index<0>, 1)), | |
51 | int>::value); |