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55 lines
1.6 KiB
C++
55 lines
1.6 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 weekday;
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// constexpr weekday& operator++() noexcept;
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// constexpr weekday operator++(int) noexcept;
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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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#include "../../euclidian.h"
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template <typename WD>
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constexpr bool testConstexpr()
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{
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WD wd{5};
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if (static_cast<unsigned>(++wd) != 6) return false;
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if (static_cast<unsigned>(wd++) != 6) return false;
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if (static_cast<unsigned>(wd) != 0) 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 weekday = std::chrono::weekday;
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ASSERT_NOEXCEPT(++(std::declval<weekday&>()) );
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ASSERT_NOEXCEPT( (std::declval<weekday&>())++);
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ASSERT_SAME_TYPE(weekday , decltype( std::declval<weekday&>()++));
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ASSERT_SAME_TYPE(weekday&, decltype(++std::declval<weekday&>() ));
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static_assert(testConstexpr<weekday>(), "");
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for (unsigned i = 0; i <= 6; ++i)
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{
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weekday wd(i);
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assert((static_cast<unsigned>(++wd) == euclidian_addition<unsigned, 0, 6>(i, 1)));
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assert((static_cast<unsigned>(wd++) == euclidian_addition<unsigned, 0, 6>(i, 1)));
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assert((static_cast<unsigned>(wd) == euclidian_addition<unsigned, 0, 6>(i, 2)));
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}
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return 0;
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}
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