1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 // <chrono>
11
12 // duration
13
14 // template <class Rep1, class Period1, class Rep2, class Period2>
15 // constexpr
16 // typename common_type<duration<Rep1, Period1>, duration<Rep2, Period2>>::type
17 // operator-(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs);
18
19 #include <chrono>
20 #include <cassert>
21
main()22 int main()
23 {
24 {
25 std::chrono::seconds s1(3);
26 std::chrono::seconds s2(5);
27 std::chrono::seconds r = s1 - s2;
28 assert(r.count() == -2);
29 }
30 {
31 std::chrono::seconds s1(3);
32 std::chrono::microseconds s2(5);
33 std::chrono::microseconds r = s1 - s2;
34 assert(r.count() == 2999995);
35 }
36 {
37 std::chrono::duration<int, std::ratio<2, 3> > s1(3);
38 std::chrono::duration<int, std::ratio<3, 5> > s2(5);
39 std::chrono::duration<int, std::ratio<1, 15> > r = s1 - s2;
40 assert(r.count() == -15);
41 }
42 {
43 std::chrono::duration<int, std::ratio<2, 3> > s1(3);
44 std::chrono::duration<double, std::ratio<3, 5> > s2(5);
45 std::chrono::duration<double, std::ratio<1, 15> > r = s1 - s2;
46 assert(r.count() == -15);
47 }
48 #ifndef _LIBCPP_HAS_NO_CONSTEXPR
49 {
50 constexpr std::chrono::seconds s1(3);
51 constexpr std::chrono::seconds s2(5);
52 constexpr std::chrono::seconds r = s1 - s2;
53 static_assert(r.count() == -2, "");
54 }
55 {
56 constexpr std::chrono::seconds s1(3);
57 constexpr std::chrono::microseconds s2(5);
58 constexpr std::chrono::microseconds r = s1 - s2;
59 static_assert(r.count() == 2999995, "");
60 }
61 {
62 constexpr std::chrono::duration<int, std::ratio<2, 3> > s1(3);
63 constexpr std::chrono::duration<int, std::ratio<3, 5> > s2(5);
64 constexpr std::chrono::duration<int, std::ratio<1, 15> > r = s1 - s2;
65 static_assert(r.count() == -15, "");
66 }
67 {
68 constexpr std::chrono::duration<int, std::ratio<2, 3> > s1(3);
69 constexpr std::chrono::duration<double, std::ratio<3, 5> > s2(5);
70 constexpr std::chrono::duration<double, std::ratio<1, 15> > r = s1 - s2;
71 static_assert(r.count() == -15, "");
72 }
73 #endif
74 }
75