forked from HowardHinnant/date
Howard Hinnant
5104a4afcb
* After much consideration I consider this not a good change. * It introduced a completely arbitrary mathematical relationship among the units. * This commit restores a precise relationship among the units which is based on the Gregorian calendar. * However this experiment has been preserved in the git history.
78 lines
3.8 KiB
C++
78 lines
3.8 KiB
C++
// Howard Hinnant
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// This work is licensed under a Creative Commons Attribution 4.0 International License.
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// http://creativecommons.org/licenses/by/4.0/
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// durations
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//
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// using days = std::chrono::duration
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// <int, std::ratio_multiply<std::ratio<24>, std::chrono::hours::period>>;
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//
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// using weeks = std::chrono::duration
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// <int, std::ratio_multiply<std::ratio<7>, days::period>>;
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//
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// using years = std::chrono::duration
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// <int, std::ratio_multiply<std::ratio<146097, 400>, days::period>>;
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//
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// using months = std::chrono::duration
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// <int, std::ratio_divide<years::period, std::ratio<12>>>;
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//
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// time_point
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//
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// using day_point = std::chrono::time_point<std::chrono::system_clock, days>;
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#include "date.h"
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#include <type_traits>
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static_assert(date::days{1} == std::chrono::seconds{86400}, "");
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static_assert(date::days{1} == std::chrono::hours{24}, "");
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static_assert( std::is_convertible<date::days, std::chrono::seconds>{}, "");
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static_assert( std::is_convertible<date::days, std::chrono::minutes>{}, "");
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static_assert( std::is_convertible<date::days, std::chrono::hours>{}, "");
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static_assert(!std::is_convertible<date::days, date::weeks>{}, "");
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static_assert(!std::is_convertible<date::days, date::months>{}, "");
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static_assert(!std::is_convertible<date::days, date::years>{}, "");
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static_assert(date::weeks{1} == std::chrono::seconds{604800}, "");
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static_assert(date::weeks{1} == date::days{7}, "");
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static_assert( std::is_convertible<date::weeks, std::chrono::seconds>{}, "");
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static_assert( std::is_convertible<date::weeks, std::chrono::minutes>{}, "");
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static_assert( std::is_convertible<date::weeks, std::chrono::hours>{}, "");
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static_assert( std::is_convertible<date::weeks, date::days>{}, "");
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static_assert(!std::is_convertible<date::weeks, date::months>{}, "");
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static_assert(!std::is_convertible<date::weeks, date::years>{}, "");
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static_assert(date::months{1} == std::chrono::seconds{2629746}, "");
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static_assert(date::days{30} < date::months{1} && date::months{1} < date::days{31}, "");
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static_assert(date::weeks{4} < date::months{1} && date::months{1} < date::weeks{5}, "");
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static_assert(!std::is_convertible<date::months, date::years>{}, "");
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static_assert(!std::is_convertible<date::months, date::weeks>{}, "");
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static_assert(!std::is_convertible<date::months, date::days>{}, "");
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static_assert(!std::is_convertible<date::months, std::chrono::hours>{}, "");
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static_assert(!std::is_convertible<date::months, std::chrono::minutes>{}, "");
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static_assert( std::is_convertible<date::months, std::chrono::seconds>{}, "");
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static_assert( std::is_convertible<date::months, std::chrono::milliseconds>{}, "");
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static_assert( std::is_convertible<date::months, std::chrono::microseconds>{}, "");
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static_assert( std::is_convertible<date::months, std::chrono::nanoseconds>{}, "");
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static_assert(date::years{1} == std::chrono::seconds{31556952}, "");
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static_assert(date::days{365} < date::years{1} && date::years{1} < date::days{366}, "");
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static_assert(date::weeks{52} < date::years{1} && date::years{1} < date::weeks{53}, "");
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static_assert(date::years{1} == date::months{12}, "");
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static_assert( std::is_convertible<date::years, date::months>{}, "");
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static_assert(!std::is_convertible<date::years, date::weeks>{}, "");
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static_assert(!std::is_convertible<date::years, date::days>{}, "");
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static_assert(!std::is_convertible<date::years, std::chrono::hours>{}, "");
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static_assert(!std::is_convertible<date::years, std::chrono::minutes>{}, "");
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static_assert( std::is_convertible<date::years, std::chrono::seconds>{}, "");
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static_assert( std::is_convertible<date::years, std::chrono::milliseconds>{}, "");
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static_assert( std::is_convertible<date::years, std::chrono::microseconds>{}, "");
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static_assert( std::is_convertible<date::years, std::chrono::nanoseconds>{}, "");
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static_assert(std::is_same<date::day_point::duration, date::days>{}, "");
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int
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main()
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{
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}
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