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61 lines
1.7 KiB
C++
61 lines
1.7 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
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// <chrono>
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// class year;
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// constexpr year operator+(const year& x, const years& y) noexcept;
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// Returns: year(int{x} + y.count()).
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//
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// constexpr year operator+(const years& x, const year& y) noexcept;
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// Returns: y + x
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#include <chrono>
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#include <type_traits>
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#include <cassert>
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#include "test_macros.h"
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template <typename Y, typename Ys>
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constexpr bool testConstexpr()
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{
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Y y{1001};
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Ys offset{23};
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if (y + offset != Y{1024}) return false;
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if (offset + y != Y{1024}) return false;
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return true;
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}
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int main(int, char**)
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{
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using year = std::chrono::year;
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using years = std::chrono::years;
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ASSERT_NOEXCEPT( std::declval<year>() + std::declval<years>());
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ASSERT_SAME_TYPE(year, decltype(std::declval<year>() + std::declval<years>()));
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ASSERT_NOEXCEPT( std::declval<years>() + std::declval<year>());
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ASSERT_SAME_TYPE(year, decltype(std::declval<years>() + std::declval<year>()));
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static_assert(testConstexpr<year, years>(), "");
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year y{1223};
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for (int i = 1100; i <= 1110; ++i)
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{
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year y1 = y + years{i};
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year y2 = years{i} + y;
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assert(y1 == y2);
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assert(static_cast<int>(y1) == i + 1223);
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assert(static_cast<int>(y2) == i + 1223);
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}
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return 0;
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}
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