plus_minus_equal_year.pass.cpp (3083B)
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_last; 13 14 // constexpr year_month_weekday_last& operator+=(const years& d) noexcept; 15 // constexpr year_month_weekday_last& operator-=(const years& d) noexcept; 16 17 #include <chrono> 18 #include <type_traits> 19 #include <cassert> 20 21 #include "test_macros.h" 22 23 template <typename D, typename Ds> 24 constexpr bool testConstexpr(D d1) 25 { 26 if (static_cast<int>((d1 ).year()) != 1) return false; 27 if (static_cast<int>((d1 += Ds{ 1}).year()) != 2) return false; 28 if (static_cast<int>((d1 += Ds{ 2}).year()) != 4) return false; 29 if (static_cast<int>((d1 += Ds{12}).year()) != 16) return false; 30 if (static_cast<int>((d1 -= Ds{ 1}).year()) != 15) return false; 31 if (static_cast<int>((d1 -= Ds{ 2}).year()) != 13) return false; 32 if (static_cast<int>((d1 -= Ds{12}).year()) != 1) return false; 33 return true; 34 } 35 36 int main() 37 { 38 using year = std::chrono::year; 39 using month = std::chrono::month; 40 using weekday = std::chrono::weekday; 41 using weekday_last = std::chrono::weekday_last; 42 using year_month_weekday_last = std::chrono::year_month_weekday_last; 43 using years = std::chrono::years; 44 45 ASSERT_NOEXCEPT(std::declval<year_month_weekday_last&>() += std::declval<years>()); 46 ASSERT_NOEXCEPT(std::declval<year_month_weekday_last&>() -= std::declval<years>()); 47 48 ASSERT_SAME_TYPE(year_month_weekday_last&, decltype(std::declval<year_month_weekday_last&>() += std::declval<years>())); 49 ASSERT_SAME_TYPE(year_month_weekday_last&, decltype(std::declval<year_month_weekday_last&>() -= std::declval<years>())); 50 51 constexpr weekday Tuesday = std::chrono::Tuesday; 52 constexpr month January = std::chrono::January; 53 54 static_assert(testConstexpr<year_month_weekday_last, years>(year_month_weekday_last{year{1}, January, weekday_last{Tuesday}}), ""); 55 56 for (int i = 1000; i <= 1010; ++i) 57 { 58 year_month_weekday_last ymwd(year{i}, January, weekday_last{Tuesday}); 59 60 assert(static_cast<int>((ymwd += years{2}).year()) == i + 2); 61 assert(ymwd.month() == January); 62 assert(ymwd.weekday() == Tuesday); 63 64 assert(static_cast<int>((ymwd ).year()) == i + 2); 65 assert(ymwd.month() == January); 66 assert(ymwd.weekday() == Tuesday); 67 68 assert(static_cast<int>((ymwd -= years{1}).year()) == i + 1); 69 assert(ymwd.month() == January); 70 assert(ymwd.weekday() == Tuesday); 71 72 assert(static_cast<int>((ymwd ).year()) == i + 1); 73 assert(ymwd.month() == January); 74 assert(ymwd.weekday() == Tuesday); 75 } 76 }