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_weekday; 13 14 // constexpr year_month_weekday operator+(const year_month_weekday& ymd, const months& dm) noexcept; 15 // Returns: (ymd.year() / ymd.month() + dm) / ymd.day(). 16 // 17 // constexpr year_month_weekday operator+(const months& dm, const year_month_weekday& ymd) noexcept; 18 // Returns: ymd + dm. 19 // 20 // 21 // constexpr year_month_weekday operator+(const year_month_weekday& ymd, const years& dy) noexcept; 22 // Returns: (ymd.year() + dy) / ymd.month() / ymd.day(). 23 // 24 // constexpr year_month_weekday operator+(const years& dy, const year_month_weekday& ymd) noexcept; 25 // Returns: ym + dm. 26 27 28 29 #include <chrono> 30 #include <type_traits> 31 #include <cassert> 32 33 #include "test_macros.h" 34 35 constexpr bool testConstexprYears(std::chrono::year_month_weekday ym) 36 { 37 std::chrono::years offset{23}; 38 if (static_cast<int>((ym ).year()) != 1) return false; 39 if (static_cast<int>((ym + offset).year()) != 24) return false; 40 if (static_cast<int>((offset + ym).year()) != 24) return false; 41 return true; 42 } 43 44 45 constexpr bool testConstexprMonths(std::chrono::year_month_weekday ym) 46 { 47 std::chrono::months offset{6}; 48 if (static_cast<unsigned>((ym ).month()) != 1) return false; 49 if (static_cast<unsigned>((ym + offset).month()) != 7) return false; 50 if (static_cast<unsigned>((offset + ym).month()) != 7) return false; 51 return true; 52 } 53 54 55 int main() 56 { 57 using year = std::chrono::year; 58 using month = std::chrono::month; 59 using weekday = std::chrono::weekday; 60 using weekday_indexed = std::chrono::weekday_indexed; 61 using year_month_weekday = std::chrono::year_month_weekday; 62 using years = std::chrono::years; 63 using months = std::chrono::months; 64 65 constexpr weekday Tuesday = std::chrono::Tuesday; 66 constexpr month January = std::chrono::January; 67 68 { // year_month_weekday + months (and switched) 69 ASSERT_NOEXCEPT(std::declval<year_month_weekday>() + std::declval<months>()); 70 ASSERT_NOEXCEPT(std::declval<months>() + std::declval<year_month_weekday>()); 71 72 ASSERT_SAME_TYPE(year_month_weekday, decltype(std::declval<year_month_weekday>() + std::declval<months>())); 73 ASSERT_SAME_TYPE(year_month_weekday, decltype(std::declval<months>() + std::declval<year_month_weekday>())); 74 75 static_assert(testConstexprMonths(year_month_weekday{year{1}, January, weekday_indexed{Tuesday, 1}}), ""); 76 77 year_month_weekday ym{year{1234}, January, weekday_indexed{Tuesday, 3}}; 78 for (int i = 0; i <= 10; ++i) // TODO test wrap-around 79 { 80 year_month_weekday ym1 = ym + months{i}; 81 year_month_weekday ym2 = months{i} + ym; 82 assert(static_cast<int>(ym1.year()) == 1234); 83 assert(static_cast<int>(ym2.year()) == 1234); 84 assert(ym1.month() == month(1 + i)); 85 assert(ym2.month() == month(1 + i)); 86 assert(ym1.weekday() == Tuesday); 87 assert(ym2.weekday() == Tuesday); 88 assert(ym1.index() == 3); 89 assert(ym2.index() == 3); 90 assert(ym1 == ym2); 91 } 92 } 93 94 { // year_month_weekday + years (and switched) 95 ASSERT_NOEXCEPT(std::declval<year_month_weekday>() + std::declval<years>()); 96 ASSERT_NOEXCEPT(std::declval<years>() + std::declval<year_month_weekday>()); 97 98 ASSERT_SAME_TYPE(year_month_weekday, decltype(std::declval<year_month_weekday>() + std::declval<years>())); 99 ASSERT_SAME_TYPE(year_month_weekday, decltype(std::declval<years>() + std::declval<year_month_weekday>())); 100 101 static_assert(testConstexprYears (year_month_weekday{year{1}, January, weekday_indexed{Tuesday, 1}}), ""); 102 103 year_month_weekday ym{year{1234}, std::chrono::January, weekday_indexed{Tuesday, 3}}; 104 for (int i = 0; i <= 10; ++i) 105 { 106 year_month_weekday ym1 = ym + years{i}; 107 year_month_weekday ym2 = years{i} + ym; 108 assert(static_cast<int>(ym1.year()) == i + 1234); 109 assert(static_cast<int>(ym2.year()) == i + 1234); 110 assert(ym1.month() == January); 111 assert(ym2.month() == January); 112 assert(ym1.weekday() == Tuesday); 113 assert(ym2.weekday() == Tuesday); 114 assert(ym1.index() == 3); 115 assert(ym2.index() == 3); 116 assert(ym1 == ym2); 117 } 118 } 119 120 } 121
