std::chrono::operator==,<=>(std::chrono::year_month_day_last)

 

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C-style date and time

 

std::chrono::year_month_day_last

Member functions

year_month_day_last::year_month_day_last

year_month_day_last::operator+=year_month_day_last::operator-=

year_month_day_last::yearyear_month_day_last::monthyear_month_day_last::dayyear_month_day_last::month_day_last

year_month_day_last::operator sys_daysyear_month_day_last::operator local_days

year_month_day_last::ok

Nonmember functions

operator==operator<=>

operator+operator-

operator<<

Helper classes

formatter<std::chrono::year_month_day_last>

hash<std::chrono::year_month_day_last> (C++26)

 

Defined in header <chrono>
constexpr bool operator==( const std::chrono::year_month_day_last& x,                            const std::chrono::year_month_day_last& y ) noexcept;	(1)	(since C++20)
constexpr std::strong_ordering     operator<=>( const std::chrono::year_month_day_last& x,                  const std::chrono::year_month_day_last& y ) noexcept;	(2)	(since C++20)

Compares the two year_month_day_last values x and y. This is a lexicographical comparison: the year() is compared first, then month().

The <, <=, >, >=, and != operators are synthesized from operator<=> and operator== respectively.

Return value

1) x.year() == y.year() && x.month() == y.month()

2) x.year() <=> y.year() != 0 ? x.year() <=> y.year() : x.month() <=> y.month()

Notes

If both x and y represent valid dates (x.ok() && y.ok() == true), the result of the lexicographical comparison is consistent with the calendar order.

Example

Run this code

#include <cassert>
#include <chrono>
#include <iostream>
 
int main()
{
    auto ymdl1{11/std::chrono::last/2020};
    auto mdl{std::chrono::last/std::chrono::November};
    auto ymdl2{mdl/2020};
    assert(ymdl1 == ymdl2);
 
    ymdl1 -= std::chrono::months{2};
    ymdl2 -= std::chrono::months{1};
    assert(ymdl1 < ymdl2);
}