| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <chrono> |
| |
| // duration |
| |
| // constexpr common_type_t<duration> operator-() const; |
| |
| #include <chrono> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| int main() |
| { |
| { |
| const std::chrono::minutes m(3); |
| std::chrono::minutes m2 = -m; |
| assert(m2.count() == -m.count()); |
| } |
| #if TEST_STD_VER >= 11 |
| { |
| constexpr std::chrono::minutes m(3); |
| constexpr std::chrono::minutes m2 = -m; |
| static_assert(m2.count() == -m.count(), ""); |
| } |
| #endif |
| |
| // P0548 |
| { |
| typedef std::chrono::duration<int, std::ratio<10,10> > D10; |
| typedef std::chrono::duration<int, std::ratio< 1, 1> > D1; |
| D10 zero(0); |
| D10 one(1); |
| static_assert( (std::is_same< decltype(-one), decltype(zero-one) >::value), ""); |
| static_assert( (std::is_same< decltype(zero-one), D1>::value), ""); |
| static_assert( (std::is_same< decltype(-one), D1>::value), ""); |
| static_assert( (std::is_same< decltype(+one), D1>::value), ""); |
| } |
| } |