202 lines
6.5 KiB
C++
202 lines
6.5 KiB
C++
// The MIT License (MIT)
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//
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// Copyright (c) 2015, 2016 Howard Hinnant
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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// class weekday
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// {
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// unsigned char wd_;
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// public:
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// explicit constexpr weekday(unsigned wd) noexcept;
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// constexpr weekday(const sys_days& dp) noexcept;
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//
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// weekday& operator++() noexcept;
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// weekday operator++(int) noexcept;
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// weekday& operator--() noexcept;
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// weekday operator--(int) noexcept;
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//
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// weekday& operator+=(const days& d) noexcept;
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// weekday& operator-=(const days& d) noexcept;
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//
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// constexpr explicit operator unsigned() const noexcept;
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// constexpr bool ok() const noexcept;
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//
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// // tested with weekday_indexed
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// constexpr weekday_indexed operator[](unsigned index) const noexcept;
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// // tested with weekday_last
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// constexpr weekday_last operator[](last_spec) const noexcept;
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// };
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// constexpr bool operator==(const weekday& x, const weekday& y) noexcept;
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// constexpr bool operator!=(const weekday& x, const weekday& y) noexcept;
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// constexpr weekday operator+(const weekday& x, const days& y) noexcept;
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// constexpr weekday operator+(const days& x, const weekday& y) noexcept;
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// constexpr weekday operator-(const weekday& x, const days& y) noexcept;
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// constexpr days operator-(const weekday& x, const weekday& y) noexcept;
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// std::ostream& operator<<(std::ostream& os, const weekday& wd);
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// constexpr weekday sun{0};
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// constexpr weekday mon{1};
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// constexpr weekday tue{2};
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// constexpr weekday wed{3};
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// constexpr weekday thu{4};
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// constexpr weekday fri{5};
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// constexpr weekday sat{6};
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#include "date.h"
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#include <cassert>
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#include <sstream>
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#include <type_traits>
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static_assert( std::is_trivially_destructible<date::weekday>{}, "");
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static_assert( std::is_default_constructible<date::weekday>{}, "");
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static_assert( std::is_trivially_copy_constructible<date::weekday>{}, "");
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static_assert( std::is_trivially_copy_assignable<date::weekday>{}, "");
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static_assert( std::is_trivially_move_constructible<date::weekday>{}, "");
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static_assert( std::is_trivially_move_assignable<date::weekday>{}, "");
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static_assert( std::is_nothrow_constructible<date::weekday, unsigned>{}, "");
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static_assert( std::is_nothrow_constructible<date::weekday, date::sys_days>{}, "");
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static_assert(!std::is_convertible<unsigned, date::weekday>{}, "");
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static_assert( std::is_convertible<date::sys_days, date::weekday>{}, "");
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static_assert(!std::is_convertible<date::weekday, unsigned>{}, "");
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static_assert( date::weekday{0u}.ok(), "");
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static_assert( date::weekday{1u}.ok(), "");
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static_assert( date::weekday{2u}.ok(), "");
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static_assert( date::weekday{3u}.ok(), "");
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static_assert( date::weekday{4u}.ok(), "");
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static_assert( date::weekday{5u}.ok(), "");
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static_assert( date::weekday{6u}.ok(), "");
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static_assert( date::weekday{7u}.ok(), "");
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static_assert(!date::weekday{8u}.ok(), "");
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void
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test_weekday_arithmetic()
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{
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using namespace date;
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constexpr unsigned a[7][7] =
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{// - Sun Mon Tue Wed Thu Fri Sat
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/*Sun*/ {0, 6, 5, 4, 3, 2, 1},
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/*Mon*/ {1, 0, 6, 5, 4, 3, 2},
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/*Tue*/ {2, 1, 0, 6, 5, 4, 3},
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/*Wed*/ {3, 2, 1, 0, 6, 5, 4},
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/*Thu*/ {4, 3, 2, 1, 0, 6, 5},
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/*Fri*/ {5, 4, 3, 2, 1, 0, 6},
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/*Sat*/ {6, 5, 4, 3, 2, 1, 0}
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};
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for (unsigned x = 0; x < 7; ++x)
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{
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for (unsigned y = 0; y < 7; ++y)
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{
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assert(weekday{x} - weekday{y} == days{a[x][y]});
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assert(weekday{x} - days{a[x][y]} == weekday{y});
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assert(weekday{x} == weekday{y} + days{a[x][y]});
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assert(weekday{x} == days{a[x][y]} + weekday{y});
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}
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}
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for (unsigned x = 0; x < 7; ++x)
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{
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for (int y = -21; y < 21; ++y)
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{
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weekday wx{x};
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days dy{y};
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wx += dy;
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weekday wz = weekday{x} + days{y};
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assert(wx.ok());
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assert(wz.ok());
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assert(wx == wz);
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assert(wx - weekday{x} == days{y % 7 + (y % 7 < 0 ? 7 : 0)});
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}
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}
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for (unsigned x = 0; x < 7; ++x)
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{
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for (int y = -21; y < 21; ++y)
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{
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weekday wx{x};
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days dy{y};
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wx -= dy;
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assert(wx == weekday{x} + days{-y});
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}
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}
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for (unsigned x = 0; x < 7; ++x)
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{
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weekday wx{x};
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assert(++wx - weekday{x} == days{1});
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assert(wx++ - weekday{x} == days{1});
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assert(wx - weekday{x} == days{2});
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assert(wx-- - weekday{x} == days{2});
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assert(wx - weekday{x} == days{1});
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assert(--wx - weekday{x} == days{0});
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}
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}
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int
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main()
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{
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using namespace date;
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static_assert(sun == weekday{0u}, "");
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static_assert(mon == weekday{1u}, "");
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static_assert(tue == weekday{2u}, "");
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static_assert(wed == weekday{3u}, "");
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static_assert(thu == weekday{4u}, "");
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static_assert(fri == weekday{5u}, "");
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static_assert(sat == weekday{6u}, "");
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static_assert(!(sun != sun), "");
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static_assert( sun != mon, "");
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static_assert( mon != sun, "");
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test_weekday_arithmetic();
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std::ostringstream os;
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os << sun;
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assert(os.str() == "Sun");
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os.str("");
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os << mon;
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assert(os.str() == "Mon");
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os.str("");
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os << tue;
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assert(os.str() == "Tue");
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os.str("");
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os << wed;
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assert(os.str() == "Wed");
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os.str("");
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os << thu;
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assert(os.str() == "Thu");
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os.str("");
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os << fri;
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assert(os.str() == "Fri");
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os.str("");
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os << sat;
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assert(os.str() == "Sat");
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}
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