op_-.pass.cpp (1299B)
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 // constexpr common_type_t<duration> operator-() const; 15 16 #include <chrono> 17 #include <cassert> 18 19 #include "test_macros.h" 20 21 int main() 22 { 23 { 24 const std::chrono::minutes m(3); 25 std::chrono::minutes m2 = -m; 26 assert(m2.count() == -m.count()); 27 } 28 #if TEST_STD_VER >= 11 29 { 30 constexpr std::chrono::minutes m(3); 31 constexpr std::chrono::minutes m2 = -m; 32 static_assert(m2.count() == -m.count(), ""); 33 } 34 #endif 35 36 // P0548 37 { 38 typedef std::chrono::duration<int, std::ratio<10,10> > D10; 39 typedef std::chrono::duration<int, std::ratio< 1, 1> > D1; 40 D10 zero(0); 41 D10 one(1); 42 static_assert( (std::is_same< decltype(-one), decltype(zero-one) >::value), ""); 43 static_assert( (std::is_same< decltype(zero-one), D1>::value), ""); 44 static_assert( (std::is_same< decltype(-one), D1>::value), ""); 45 static_assert( (std::is_same< decltype(+one), D1>::value), ""); 46 } 47 }