50 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// <chrono>10 11// duration12 13// constexpr common_type_t<duration> operator+() const;14 15#include <chrono>16#include <cassert>17#include <ratio>18#include <type_traits>19 20#include "test_macros.h"21 22int main(int, char**)23{24 {25 const std::chrono::minutes m(3);26 std::chrono::minutes m2 = +m;27 assert(m.count() == m2.count());28 }29#if TEST_STD_VER >= 1130 {31 constexpr std::chrono::minutes m(3);32 constexpr std::chrono::minutes m2 = +m;33 static_assert(m.count() == m2.count(), "");34 }35#endif36 37// P054838 {39 typedef std::chrono::duration<int, std::ratio<10,10> > D10;40 typedef std::chrono::duration<int, std::ratio< 1, 1> > D1;41 D10 zero(0);42 D10 one(1);43 static_assert( (std::is_same< decltype(+one), decltype(zero-one) >::value), "");44 static_assert( (std::is_same< decltype(zero+one), D1>::value), "");45 static_assert( (std::is_same< decltype(+one), D1>::value), "");46 }47 48 return 0;49}50