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

 

C++

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Feature test macros (C++20)

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Concepts library (C++20)

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Date and time library

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Technical specifications

Symbols index

External libraries

 

Date and time library

Time point time_point (C++11) clock_time_conversion (C++20)   clock_cast (C++20) Duration duration (C++11) Clocks system_clock (C++11) steady_clock (C++11) is_clock (C++20) utc_clock (C++20) tai_clock (C++20) high_resolution_clock (C++11) gps_clock (C++20) file_clock (C++20) local_t (C++20) Time of day is_amis_pm (C++20)(C++20) make12make24 (C++20)(C++20) hh_mm_ss (C++20)

Calendar day (C++20) month (C++20) year (C++20) weekday (C++20) operator/ (C++20) year_month_day (C++20) year_month_day_last (C++20) year_month_weekday (C++20) year_month_weekday_last (C++20)   weekday_indexed (C++20) weekday_last (C++20) month_day (C++20) month_day_last (C++20) month_weekday (C++20) month_weekday_last (C++20) year_month (C++20) last_speclast (C++20)(C++20) chrono I/O parse (C++20)

Time zone tzdb (C++20) tzdb_list (C++20) get_tzdbget_tzdb_listreload_tzdbremote_version (C++20)(C++20)(C++20)(C++20) sys_info (C++20) local_info (C++20) nonexistent_local_time (C++20) ambiguous_local_time (C++20) locate_zone (C++20) current_zone (C++20) time_zone (C++20) choose (C++20) zoned_traits (C++20) zoned_time (C++20) time_zone_link (C++20) leap_second (C++20) leap_second_info (C++20) get_leap_second_info (C++20) C-style date and time

 

std::chrono::month_day

Member functions

month_day::month_day

month_day::monthmonth_day::day

month_day::ok

Nonmember functions

operator==operator<=>

operator<<

from_stream

Helper classes

formatter<std::chrono::month_day>

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

 

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

Compares two month_day values.

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

Return value

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

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

Example

Run this code

#include <chrono>
#include <iostream>
 
int main()
{
    constexpr auto md1{std::chrono::August/15};
    constexpr auto md2{std::chrono::month(8)/std::chrono::day(15)};
    std::cout << std::boolalpha << (md1 == md2) << '\n';
 
    static_assert(md1 <= md2);
}

Output:

true

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