1 // The MIT License (MIT)
2 //
3 // Copyright (c) 2015, 2016 Howard Hinnant
4 //
5 // Permission is hereby granted, free of charge, to any person obtaining a copy
6 // of this software and associated documentation files (the "Software"), to deal
7 // in the Software without restriction, including without limitation the rights
8 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 // copies of the Software, and to permit persons to whom the Software is
10 // furnished to do so, subject to the following conditions:
11 //
12 // The above copyright notice and this permission notice shall be included in all
13 // copies or substantial portions of the Software.
14 //
15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 // SOFTWARE.
22
23 // class weekday
24 // {
25 // unsigned char wd_;
26 // public:
27 // explicit constexpr weekday(unsigned wd) noexcept;
28 // constexpr weekday(date::weekday wd) noexcept;
29 // constexpr weekday(const sys_days& dp) noexcept;
30 //
31 // weekday& operator++() noexcept;
32 // weekday operator++(int) noexcept;
33 // weekday& operator--() noexcept;
34 // weekday operator--(int) noexcept;
35 //
36 // weekday& operator+=(const days& d) noexcept;
37 // weekday& operator-=(const days& d) noexcept;
38 //
39 // constexpr explicit operator unsigned() const noexcept;
40 // constexpr operator date::weekday() const noexcept;
41 // constexpr bool ok() const noexcept;
42 //
43 // // tested with weekday_indexed
44 // constexpr weekday_indexed operator[](unsigned index) const noexcept;
45 // // tested with weekday_last
46 // constexpr weekday_last operator[](last_spec) const noexcept;
47 // };
48
49 // constexpr bool operator==(const weekday& x, const weekday& y) noexcept;
50 // constexpr bool operator!=(const weekday& x, const weekday& y) noexcept;
51
52 // constexpr weekday operator+(const weekday& x, const days& y) noexcept;
53 // constexpr weekday operator+(const days& x, const weekday& y) noexcept;
54 // constexpr weekday operator-(const weekday& x, const days& y) noexcept;
55 // constexpr days operator-(const weekday& x, const weekday& y) noexcept;
56
57 // std::ostream& operator<<(std::ostream& os, const weekday& wd);
58
59 // constexpr weekday sun{7};
60 // constexpr weekday mon{1};
61 // constexpr weekday tue{2};
62 // constexpr weekday wed{3};
63 // constexpr weekday thu{4};
64 // constexpr weekday fri{5};
65 // constexpr weekday sat{6};
66
67 #include "iso_week.h"
68 #include "date.h"
69
70 #include <cassert>
71 #include <sstream>
72 #include <type_traits>
73
74 #include <iostream>
75
76 static_assert( std::is_trivially_destructible<iso_week::weekday>{}, "");
77 static_assert(!std::is_default_constructible<iso_week::weekday>{}, "");
78 static_assert( std::is_trivially_copy_constructible<iso_week::weekday>{}, "");
79 static_assert( std::is_trivially_copy_assignable<iso_week::weekday>{}, "");
80 static_assert( std::is_trivially_move_constructible<iso_week::weekday>{}, "");
81 static_assert( std::is_trivially_move_assignable<iso_week::weekday>{}, "");
82
83 static_assert(std::is_trivially_copyable<iso_week::weekday>{}, "");
84 static_assert(std::is_standard_layout<iso_week::weekday>{}, "");
85 static_assert(std::is_literal_type<iso_week::weekday>{}, "");
86
87 static_assert( std::is_nothrow_constructible<iso_week::weekday, unsigned>{}, "");
88 static_assert( std::is_nothrow_constructible<iso_week::weekday, iso_week::sys_days>{}, "");
89 static_assert( std::is_nothrow_constructible<iso_week::weekday, date::weekday>{}, "");
90 static_assert( std::is_nothrow_constructible<date::weekday, iso_week::weekday>{}, "");
91 static_assert( std::is_nothrow_constructible<unsigned, iso_week::weekday>{}, "");
92 static_assert(!std::is_convertible<unsigned, iso_week::weekday>{}, "");
93 static_assert( std::is_convertible<iso_week::sys_days, iso_week::weekday>{}, "");
94 static_assert( std::is_convertible<iso_week::weekday, date::weekday>{}, "");
95 static_assert( std::is_convertible<date::weekday, iso_week::weekday>{}, "");
96 static_assert(!std::is_convertible<iso_week::weekday, unsigned>{}, "");
97 static_assert(static_cast<unsigned>(iso_week::weekday{1u}) == 1, "");
98
99 static_assert(!iso_week::weekday{0u}.ok(), "");
100 static_assert( iso_week::weekday{1u}.ok(), "");
101 static_assert( iso_week::weekday{2u}.ok(), "");
102 static_assert( iso_week::weekday{3u}.ok(), "");
103 static_assert( iso_week::weekday{4u}.ok(), "");
104 static_assert( iso_week::weekday{5u}.ok(), "");
105 static_assert( iso_week::weekday{6u}.ok(), "");
106 static_assert( iso_week::weekday{7u}.ok(), "");
107
108 void
test_weekday_arithmetic()109 test_weekday_arithmetic()
110 {
111 using namespace iso_week;
112 constexpr unsigned a[7][7] =
113 {// - Mon Tue Wed Thu Fri Sat Sun
114 /*Mon*/ {0, 6, 5, 4, 3, 2, 1},
115 /*Tue*/ {1, 0, 6, 5, 4, 3, 2},
116 /*Wed*/ {2, 1, 0, 6, 5, 4, 3},
117 /*Thu*/ {3, 2, 1, 0, 6, 5, 4},
118 /*Fri*/ {4, 3, 2, 1, 0, 6, 5},
119 /*Sat*/ {5, 4, 3, 2, 1, 0, 6},
120 /*Sun*/ {6, 5, 4, 3, 2, 1, 0}
121 };
122 for (unsigned x = 1; x <= 7; ++x)
123 {
124 for (unsigned y = 1; y <= 7; ++y)
125 {
126 assert(weekday{x} - weekday{y} == days{a[x-1][y-1]});
127 assert(weekday{x} - days{a[x-1][y-1]} == weekday{y});
128 assert(weekday{x} == weekday{y} + days{a[x-1][y-1]});
129 assert(weekday{x} == days{a[x-1][y-1]} + weekday{y});
130 }
131 }
132 for (unsigned x = 1; x <= 7; ++x)
133 {
134 for (int y = -21; y < 21; ++y)
135 {
136 weekday wx{x};
137 days dy{y};
138 wx += dy;
139 weekday wz = weekday{x} + days{y};
140 assert(wx.ok());
141 assert(wz.ok());
142 assert(wx == wz);
143 assert(wx - weekday{x} == days{y % 7 + (y % 7 < 0 ? 7 : 0)});
144 }
145 }
146 for (unsigned x = 1; x <= 7; ++x)
147 {
148 for (int y = -21; y < 21; ++y)
149 {
150 weekday wx{x};
151 days dy{y};
152 wx -= dy;
153 assert(wx == weekday{x} + days{-y});
154 }
155 }
156 for (unsigned x = 1; x <= 7; ++x)
157 {
158 weekday wx{x};
159 assert(++wx - weekday{x} == days{1});
160 assert(wx++ - weekday{x} == days{1});
161 assert(wx - weekday{x} == days{2});
162 assert(wx-- - weekday{x} == days{2});
163 assert(wx - weekday{x} == days{1});
164 assert(--wx - weekday{x} == days{0});
165 }
166 }
167
168 void
test_with_date_weekday()169 test_with_date_weekday()
170 {
171 auto constexpr d1 = iso_week::sun;
172 static_assert(unsigned{d1} == 7, "");
173 auto constexpr d2 = date::weekday{d1};
174 static_assert(d2 == date::Sunday, "");
175 auto constexpr d3 = iso_week::weekday{d2};
176 static_assert(unsigned{d3} == 7, "");
177 }
178
179 int
main()180 main()
181 {
182 using namespace iso_week;
183
184 static_assert(sun == weekday{7u}, "");
185 static_assert(mon == weekday{1u}, "");
186 static_assert(tue == weekday{2u}, "");
187 static_assert(wed == weekday{3u}, "");
188 static_assert(thu == weekday{4u}, "");
189 static_assert(fri == weekday{5u}, "");
190 static_assert(sat == weekday{6u}, "");
191
192 static_assert(!(sun != sun), "");
193 static_assert( sun != mon, "");
194 static_assert( mon != sun, "");
195
196 test_weekday_arithmetic();
197 test_with_date_weekday();
198
199 std::ostringstream os;
200
201 os << sun;
202 assert(os.str() == "Sun");
203 os.str("");
204
205 os << mon;
206 assert(os.str() == "Mon");
207 os.str("");
208
209 os << tue;
210 assert(os.str() == "Tue");
211 os.str("");
212
213 os << wed;
214 assert(os.str() == "Wed");
215 os.str("");
216
217 os << thu;
218 assert(os.str() == "Thu");
219 os.str("");
220
221 os << fri;
222 assert(os.str() == "Fri");
223 os.str("");
224
225 os << sat;
226 assert(os.str() == "Sat");
227 }
228