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 // UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
10
11 // <chrono>
12 // class year_month;
13
14 // constexpr bool operator==(const year_month& x, const year_month& y) noexcept;
15 // Returns: x.year() == y.year() && x.month() == y.month().
16 //
17 // constexpr bool operator< (const year_month& x, const year_month& y) noexcept;
18 // Returns:
19 // If x.year() < y.year() returns true.
20 // Otherwise, if x.year() > y.year() returns false.
21 // Otherwise, returns x.month() < y.month().
22
23 #include <chrono>
24 #include <type_traits>
25 #include <cassert>
26
27 #include "test_macros.h"
28 #include "test_comparisons.h"
29
main()30 int main()
31 {
32 using year = std::chrono::year;
33 using month = std::chrono::month;
34 using year_month = std::chrono::year_month;
35
36 AssertComparisons6AreNoexcept<year_month>();
37 AssertComparisons6ReturnBool<year_month>();
38
39 static_assert( testComparisons6(
40 year_month{year{1234}, std::chrono::January},
41 year_month{year{1234}, std::chrono::January},
42 true, false), "");
43
44 static_assert( testComparisons6(
45 year_month{year{1234}, std::chrono::January},
46 year_month{year{1234}, std::chrono::February},
47 false, true), "");
48
49 static_assert( testComparisons6(
50 year_month{year{1234}, std::chrono::January},
51 year_month{year{1235}, std::chrono::January},
52 false, true), "");
53
54 // same year, different months
55 for (unsigned i = 1; i < 12; ++i)
56 for (unsigned j = 1; j < 12; ++j)
57 assert((testComparisons6(
58 year_month{year{1234}, month{i}},
59 year_month{year{1234}, month{j}},
60 i == j, i < j )));
61
62 // same month, different years
63 for (int i = 1000; i < 20; ++i)
64 for (int j = 1000; j < 20; ++j)
65 assert((testComparisons6(
66 year_month{year{i}, std::chrono::January},
67 year_month{year{j}, std::chrono::January},
68 i == j, i < j )));
69 }
70