228 lines
7.3 KiB
C++
228 lines
7.3 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 year_month
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// {
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// public:
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// constexpr year_month(const date::year& y, const date::month& m) noexcept;
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//
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// constexpr date::year year() const noexcept;
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// constexpr date::month month() const noexcept;
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//
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// year_month& operator+=(const months& dm) noexcept;
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// year_month& operator-=(const months& dm) noexcept;
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// year_month& operator+=(const years& dy) noexcept;
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// year_month& operator-=(const years& dy) noexcept;
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//
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// constexpr bool ok() const noexcept;
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// };
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// constexpr bool operator==(const year_month& x, const year_month& y) noexcept;
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// constexpr bool operator!=(const year_month& x, const year_month& y) noexcept;
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// constexpr bool operator< (const year_month& x, const year_month& y) noexcept;
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// constexpr bool operator> (const year_month& x, const year_month& y) noexcept;
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// constexpr bool operator<=(const year_month& x, const year_month& y) noexcept;
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// constexpr bool operator>=(const year_month& x, const year_month& y) noexcept;
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// constexpr year_month operator+(const year_month& ym, const months& dm) noexcept;
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// constexpr year_month operator+(const months& dm, const year_month& ym) noexcept;
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// constexpr year_month operator-(const year_month& ym, const months& dm) noexcept;
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// constexpr months operator-(const year_month& x, const year_month& y) noexcept;
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// constexpr year_month operator+(const year_month& ym, const years& dy) noexcept;
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// constexpr year_month operator+(const years& dy, const year_month& ym) noexcept;
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// constexpr year_month operator-(const year_month& ym, const years& dy) noexcept;
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// std::ostream& operator<<(std::ostream& os, const year_month& ym);
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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::year_month>{}, "");
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static_assert( std::is_default_constructible<date::year_month>{}, "");
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static_assert( std::is_trivially_copy_constructible<date::year_month>{}, "");
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static_assert( std::is_trivially_copy_assignable<date::year_month>{}, "");
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static_assert( std::is_trivially_move_constructible<date::year_month>{}, "");
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static_assert( std::is_trivially_move_assignable<date::year_month>{}, "");
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static_assert(std::is_nothrow_constructible<date::year_month, date::year,
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date::month>{}, "");
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void
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test_arithmetic()
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{
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using namespace date;
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using namespace std::chrono;
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for (int y1 = 2010; y1 <= 2015; ++y1)
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{
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for (int y2 = 2010; y2 <= 2015; ++y2)
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{
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for (unsigned m1 = 1; m1 <= 12; ++m1)
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{
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for (unsigned m2 = 1; m2 <= 12; ++m2)
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{
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year_month ym1{year{y1}, month{m1}};
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year_month ym2 = {year{y2}, month{m2}};
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months dm = ym1 - ym2;
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assert((dm < months{0}) == (ym1 < ym2));
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assert((dm == months{0}) == (ym1 == ym2));
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assert((dm > months{0}) == (ym1 > ym2));
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assert(dm + ym2 == ym1);
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assert(ym2 + dm == ym1);
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assert(ym1 - dm == ym2);
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years dy{y1-y2};
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assert((ym1 + dy == year_month{ym1.year() + dy, ym1.month()}));
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assert((dy + ym1 == year_month{ym1.year() + dy, ym1.month()}));
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assert((ym1 - dy == year_month{ym1.year() - dy, ym1.month()}));
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assert((year_month{ym2} += dm) == ym1);
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assert((year_month{ym1} -= dm) == ym2);
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assert(((year_month{ym1} += dy) ==
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year_month{ym1.year() + dy, ym1.month()}));
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assert(((year_month{ym1} -= dy) ==
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year_month{ym1.year() - dy, ym1.month()}));
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}
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}
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}
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}
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}
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void test_arithemtic_not_ok()
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{
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using namespace date;
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using namespace std::chrono;
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year_month ym{2018_y, month{14}};
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{
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year_month ym2{2019_y, month{2}};
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assert(ym + months{0} == ym2);
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assert(ym - months{0} == ym2);
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assert(ym - ym2 == months{0});
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assert(ym2 - ym == months{0});
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auto ymc = ym;
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ymc += months{0};
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assert(ymc.ok());
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assert(ymc == ym2);
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}
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{
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year_month ym2{2019_y, month{6}};
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assert(ym + months{4} == ym2);
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assert(ym2 - ym == months{4});
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assert(ym - ym2 == -months{4});
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auto ymc = ym;
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ymc += months{4};
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assert(ymc.ok());
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assert(ymc == ym2);
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}
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{
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year_month ym2{2018_y, month{10}};
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assert(ym - months{4} == ym2);
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assert(ym2 - ym == -months{4});
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assert(ym - ym2 == months{4});
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auto ymc = ym;
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ymc -= months{4};
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assert(ymc.ok());
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assert(ymc == ym2);
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}
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{
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year_month ym2{2020_y, month{6}};
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assert(ym + months{16} == ym2);
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assert(ym2 - ym == months{16});
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assert(ym - ym2 == -months{16});
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auto ymc = ym;
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ymc += months{16};
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assert(ymc.ok());
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assert(ymc == ym2);
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}
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{
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year_month ym2{2017_y, month{10}};
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assert(ym - months{16} == ym2);
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assert(ym2 - ym == -months{16});
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assert(ym - ym2 == months(16));
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auto ymc = ym;
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ymc -= months{16};
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assert(ymc.ok());
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assert(ymc == ym2);
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}
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{
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year_month ym2{2018_y, month{25}};
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assert(ym2 - ym == months{11});
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assert(ym - ym2 == -months{11});
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}
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{
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year_month ym2{2019_y, month{25}};
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assert(ym2 - ym == months{23});
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assert(ym - ym2 == -months{23});
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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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constexpr year_month ym1 = {2015_y, jun};
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static_assert(ym1.year() == year{2015}, "");
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static_assert(ym1.month() == jun, "");
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static_assert(ym1.ok(), "");
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constexpr year_month ym2 = {2016_y, may};
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static_assert(ym2.year() == year{2016}, "");
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static_assert(ym2.month() == may, "");
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static_assert(ym2.ok(), "");
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static_assert(ym1 == ym1, "");
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static_assert(ym1 != ym2, "");
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static_assert(ym1 < ym2, "");
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static_assert(ym1 <= ym2, "");
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static_assert(ym2 > ym1, "");
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static_assert(ym2 >= ym2, "");
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static_assert(ym2 - ym1 == months{11}, "");
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static_assert(ym1 - ym2 == -months{11}, "");
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test_arithmetic();
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test_arithemtic_not_ok();
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std::ostringstream os;
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os << ym1;
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assert(os.str() == "2015/Jun");
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}
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