1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // <chrono>
10
11 // duration
12
13 // constexpr common_type_t<duration> operator+() const;
14
15 #include <chrono>
16 #include <cassert>
17
18 #include "test_macros.h"
19
main(int,char **)20 int main(int, char**)
21 {
22 {
23 const std::chrono::minutes m(3);
24 std::chrono::minutes m2 = +m;
25 assert(m.count() == m2.count());
26 }
27 #if TEST_STD_VER >= 11
28 {
29 constexpr std::chrono::minutes m(3);
30 constexpr std::chrono::minutes m2 = +m;
31 static_assert(m.count() == m2.count(), "");
32 }
33 #endif
34
35 // P0548
36 {
37 typedef std::chrono::duration<int, std::ratio<10,10> > D10;
38 typedef std::chrono::duration<int, std::ratio< 1, 1> > D1;
39 D10 zero(0);
40 D10 one(1);
41 static_assert( (std::is_same< decltype(+one), decltype(zero-one) >::value), "");
42 static_assert( (std::is_same< decltype(zero+one), D1>::value), "");
43 static_assert( (std::is_same< decltype(+one), D1>::value), "");
44 }
45
46 return 0;
47 }
48