plus_minus_equal_month.pass.cpp (3240B)
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 months& m) noexcept; 15 // constexpr year_month_weekday& operator-=(const months& m) 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<unsigned>((d1 ).month()) != 1) return false; 27 if (static_cast<unsigned>((d1 += Ds{ 1}).month()) != 2) return false; 28 if (static_cast<unsigned>((d1 += Ds{ 2}).month()) != 4) return false; 29 if (static_cast<unsigned>((d1 += Ds{12}).month()) != 4) return false; 30 if (static_cast<unsigned>((d1 -= Ds{ 1}).month()) != 3) return false; 31 if (static_cast<unsigned>((d1 -= Ds{ 2}).month()) != 1) return false; 32 if (static_cast<unsigned>((d1 -= Ds{12}).month()) != 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_indexed = std::chrono::weekday_indexed; 42 using year_month_weekday = std::chrono::year_month_weekday; 43 using months = std::chrono::months; 44 45 46 ASSERT_NOEXCEPT( std::declval<year_month_weekday&>() += std::declval<months>()); 47 ASSERT_SAME_TYPE(year_month_weekday&, decltype(std::declval<year_month_weekday&>() += std::declval<months>())); 48 49 ASSERT_NOEXCEPT( std::declval<year_month_weekday&>() -= std::declval<months>()); 50 ASSERT_SAME_TYPE(year_month_weekday&, decltype(std::declval<year_month_weekday&>() -= std::declval<months>())); 51 52 constexpr weekday Tuesday = std::chrono::Tuesday; 53 static_assert(testConstexpr<year_month_weekday, months>(year_month_weekday{year{1234}, month{1}, weekday_indexed{Tuesday, 2}}), ""); 54 55 for (unsigned i = 0; i <= 10; ++i) 56 { 57 year y{1234}; 58 year_month_weekday ymwd(y, month{i}, weekday_indexed{Tuesday, 2}); 59 60 assert(static_cast<unsigned>((ymwd += months{2}).month()) == i + 2); 61 assert(ymwd.year() == y); 62 assert(ymwd.weekday() == Tuesday); 63 assert(ymwd.index() == 2); 64 65 assert(static_cast<unsigned>((ymwd ).month()) == i + 2); 66 assert(ymwd.year() == y); 67 assert(ymwd.weekday() == Tuesday); 68 assert(ymwd.index() == 2); 69 70 assert(static_cast<unsigned>((ymwd -= months{1}).month()) == i + 1); 71 assert(ymwd.year() == y); 72 assert(ymwd.weekday() == Tuesday); 73 assert(ymwd.index() == 2); 74 75 assert(static_cast<unsigned>((ymwd ).month()) == i + 1); 76 assert(ymwd.year() == y); 77 assert(ymwd.weekday() == Tuesday); 78 assert(ymwd.index() == 2); 79 } 80 }