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116 lines
3.8 KiB
C++
116 lines
3.8 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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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 month_weekday;
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// constexpr month_weekday
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// operator/(const month& m, const weekday_indexed& wdi) noexcept;
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// Returns: {m, wdi}.
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//
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// constexpr month_weekday
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// operator/(int m, const weekday_indexed& wdi) noexcept;
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// Returns: month(m) / wdi.
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//
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// constexpr month_weekday
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// operator/(const weekday_indexed& wdi, const month& m) noexcept;
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// Returns: m / wdi. constexpr month_weekday
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//
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// constexpr month_weekday
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// operator/(const weekday_indexed& wdi, int m) noexcept;
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// Returns: month(m) / wdi.
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//
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// [Example:
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// constexpr auto mwd = February/Tuesday[3]; // mwd is the third Tuesday of February of an as yet unspecified year
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// static_assert(mwd.month() == February);
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// static_assert(mwd.weekday_indexed() == Tuesday[3]);
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// —end example]
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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 "test_comparisons.h"
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int main()
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{
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using month_weekday = std::chrono::month_weekday;
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using month = std::chrono::month;
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using weekday = std::chrono::weekday;
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using weekday_indexed = std::chrono::weekday_indexed;
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constexpr weekday Tuesday = std::chrono::Tuesday;
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constexpr month February = std::chrono::February;
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{ // operator/(const month& m, const weekday_indexed& wdi) (and switched)
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ASSERT_NOEXCEPT (February/Tuesday[2]);
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ASSERT_SAME_TYPE(month_weekday, decltype(February/Tuesday[2]));
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ASSERT_NOEXCEPT (Tuesday[2]/February);
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ASSERT_SAME_TYPE(month_weekday, decltype(Tuesday[2]/February));
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// Run the example
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{
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constexpr month_weekday wdi = February/Tuesday[3];
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static_assert(wdi.month() == February, "");
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static_assert(wdi.weekday_indexed() == Tuesday[3], "");
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}
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for (int i = 1; i <= 12; ++i)
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for (unsigned j = 0; j <= 6; ++j)
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for (unsigned k = 1; k <= 5; ++k)
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{
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month m(i);
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weekday_indexed wdi = weekday{j}[k];
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month_weekday mwd1 = m/wdi;
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month_weekday mwd2 = wdi/m;
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assert(mwd1.month() == m);
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assert(mwd1.weekday_indexed() == wdi);
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assert(mwd2.month() == m);
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assert(mwd2.weekday_indexed() == wdi);
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assert(mwd1 == mwd2);
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}
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}
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{ // operator/(int m, const weekday_indexed& wdi) (and switched)
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ASSERT_NOEXCEPT (2/Tuesday[2]);
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ASSERT_SAME_TYPE(month_weekday, decltype(2/Tuesday[2]));
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ASSERT_NOEXCEPT (Tuesday[2]/2);
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ASSERT_SAME_TYPE(month_weekday, decltype(Tuesday[2]/2));
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// Run the example
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{
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constexpr month_weekday wdi = 2/Tuesday[3];
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static_assert(wdi.month() == February, "");
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static_assert(wdi.weekday_indexed() == Tuesday[3], "");
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}
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for (int i = 1; i <= 12; ++i)
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for (unsigned j = 0; j <= 6; ++j)
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for (unsigned k = 1; k <= 5; ++k)
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{
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weekday_indexed wdi = weekday{j}[k];
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month_weekday mwd1 = i/wdi;
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month_weekday mwd2 = wdi/i;
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assert(mwd1.month() == month(i));
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assert(mwd1.weekday_indexed() == wdi);
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assert(mwd2.month() == month(i));
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assert(mwd2.weekday_indexed() == wdi);
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assert(mwd1 == mwd2);
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}
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}
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}
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