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 10 // <chrono> 11 12 // duration 13 14 // template <class Rep1, class Period1, class Rep2, class Period2> 15 // constexpr 16 // typename common_type<duration<Rep1, Period1>, duration<Rep2, Period2>>::type 17 // operator-(const duration<Rep1, Period1>& lhs, const duration<Rep2, Period2>& rhs); 18 19 #include <chrono> 20 #include <cassert> 21 22 int main() 23 { 24 { 25 std::chrono::seconds s1(3); 26 std::chrono::seconds s2(5); 27 std::chrono::seconds r = s1 - s2; 28 assert(r.count() == -2); 29 } 30 { 31 std::chrono::seconds s1(3); 32 std::chrono::microseconds s2(5); 33 std::chrono::microseconds r = s1 - s2; 34 assert(r.count() == 2999995); 35 } 36 { 37 std::chrono::duration<int, std::ratio<2, 3> > s1(3); 38 std::chrono::duration<int, std::ratio<3, 5> > s2(5); 39 std::chrono::duration<int, std::ratio<1, 15> > r = s1 - s2; 40 assert(r.count() == -15); 41 } 42 { 43 std::chrono::duration<int, std::ratio<2, 3> > s1(3); 44 std::chrono::duration<double, std::ratio<3, 5> > s2(5); 45 std::chrono::duration<double, std::ratio<1, 15> > r = s1 - s2; 46 assert(r.count() == -15); 47 } 48 #ifndef _LIBCPP_HAS_NO_CONSTEXPR 49 { 50 constexpr std::chrono::seconds s1(3); 51 constexpr std::chrono::seconds s2(5); 52 constexpr std::chrono::seconds r = s1 - s2; 53 static_assert(r.count() == -2, ""); 54 } 55 { 56 constexpr std::chrono::seconds s1(3); 57 constexpr std::chrono::microseconds s2(5); 58 constexpr std::chrono::microseconds r = s1 - s2; 59 static_assert(r.count() == 2999995, ""); 60 } 61 { 62 constexpr std::chrono::duration<int, std::ratio<2, 3> > s1(3); 63 constexpr std::chrono::duration<int, std::ratio<3, 5> > s2(5); 64 constexpr std::chrono::duration<int, std::ratio<1, 15> > r = s1 - s2; 65 static_assert(r.count() == -15, ""); 66 } 67 { 68 constexpr std::chrono::duration<int, std::ratio<2, 3> > s1(3); 69 constexpr std::chrono::duration<double, std::ratio<3, 5> > s2(5); 70 constexpr std::chrono::duration<double, std::ratio<1, 15> > r = s1 - s2; 71 static_assert(r.count() == -15, ""); 72 } 73 #endif 74 } 75
