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_day; 13 14 // constexpr year_month_day operator+(const year_month_day& ymd, const months& dm) noexcept; 15 // Returns: (ymd.year() / ymd.month() + dm) / ymd.day(). 16 // 17 // constexpr year_month_day operator+(const months& dm, const year_month_day& ymd) noexcept; 18 // Returns: ymd + dm. 19 // 20 // 21 // constexpr year_month_day operator+(const year_month_day& ymd, const years& dy) noexcept; 22 // Returns: (ymd.year() + dy) / ymd.month() / ymd.day(). 23 // 24 // constexpr year_month_day operator+(const years& dy, const year_month_day& 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_day 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_day 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 day = std::chrono::day; 58 using year = std::chrono::year; 59 using years = std::chrono::years; 60 using month = std::chrono::month; 61 using months = std::chrono::months; 62 using year_month_day = std::chrono::year_month_day; 63 64 { // year_month_day + months 65 ASSERT_NOEXCEPT(std::declval<year_month_day>() + std::declval<months>()); 66 ASSERT_NOEXCEPT(std::declval<months>() + std::declval<year_month_day>()); 67 68 ASSERT_SAME_TYPE(year_month_day, decltype(std::declval<year_month_day>() + std::declval<months>())); 69 ASSERT_SAME_TYPE(year_month_day, decltype(std::declval<months>() + std::declval<year_month_day>())); 70 71 static_assert(testConstexprMonths(year_month_day{year{1}, month{1}, day{1}}), ""); 72 73 year_month_day ym{year{1234}, std::chrono::January, day{12}}; 74 for (int i = 0; i <= 10; ++i) // TODO test wrap-around 75 { 76 year_month_day ym1 = ym + months{i}; 77 year_month_day ym2 = months{i} + ym; 78 assert(static_cast<int>(ym1.year()) == 1234); 79 assert(static_cast<int>(ym2.year()) == 1234); 80 assert(ym1.month() == month(1 + i)); 81 assert(ym2.month() == month(1 + i)); 82 assert(ym1.day() == day{12}); 83 assert(ym2.day() == day{12}); 84 assert(ym1 == ym2); 85 } 86 } 87 88 { // year_month_day + years 89 ASSERT_NOEXCEPT(std::declval<year_month_day>() + std::declval<years>()); 90 ASSERT_NOEXCEPT(std::declval<years>() + std::declval<year_month_day>()); 91 92 ASSERT_SAME_TYPE(year_month_day, decltype(std::declval<year_month_day>() + std::declval<years>())); 93 ASSERT_SAME_TYPE(year_month_day, decltype(std::declval<years>() + std::declval<year_month_day>())); 94 95 static_assert(testConstexprYears (year_month_day{year{1}, month{1}, day{1}}), ""); 96 97 year_month_day ym{year{1234}, std::chrono::January, day{12}}; 98 for (int i = 0; i <= 10; ++i) 99 { 100 year_month_day ym1 = ym + years{i}; 101 year_month_day ym2 = years{i} + ym; 102 assert(static_cast<int>(ym1.year()) == i + 1234); 103 assert(static_cast<int>(ym2.year()) == i + 1234); 104 assert(ym1.month() == std::chrono::January); 105 assert(ym2.month() == std::chrono::January); 106 assert(ym1.day() == day{12}); 107 assert(ym2.day() == day{12}); 108 assert(ym1 == ym2); 109 } 110 } 111 112 } 113
