plus_minus_equal_year.pass.cpp (2416B)
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 year_month& operator+=(const years& d) noexcept; 15 // constexpr year_month& 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 month = std::chrono::month; 39 using year = std::chrono::year; 40 using years = std::chrono::years; 41 using year_month = std::chrono::year_month; 42 43 44 ASSERT_NOEXCEPT( std::declval<year_month&>() += std::declval<years>()); 45 ASSERT_SAME_TYPE(year_month&, decltype(std::declval<year_month&>() += std::declval<years>())); 46 47 ASSERT_NOEXCEPT( std::declval<year_month&>() -= std::declval<years>()); 48 ASSERT_SAME_TYPE(year_month&, decltype(std::declval<year_month&>() -= std::declval<years>())); 49 50 static_assert(testConstexpr<year_month, years>(year_month{year{1}, month{1}}), ""); 51 52 for (int i = 1000; i <= 1010; ++i) 53 { 54 month m{2}; 55 year_month ym(year{i}, m); 56 assert(static_cast<int>((ym += years{2}).year()) == i + 2); 57 assert(ym.month() == m); 58 assert(static_cast<int>((ym ).year()) == i + 2); 59 assert(ym.month() == m); 60 assert(static_cast<int>((ym -= years{1}).year()) == i + 1); 61 assert(ym.month() == m); 62 assert(static_cast<int>((ym ).year()) == i + 1); 63 assert(ym.month() == m); 64 } 65 }