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

 

C++

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General utilities Date and time Function objects Formatting library (C++20) bitset hash (C++11) Relational operators (deprecated in C++20) rel_ops::operator!=rel_ops::operator> rel_ops::operator<=rel_ops::operator>= Integer comparison functions cmp_equalcmp_lesscmp_less_than (C++20)(C++20)(C++20)    cmp_not_equalcmp_greatercmp_greater_than (C++20)(C++20)(C++20) in_range (C++20) Swap and type operations swap ranges::swap (C++20) exchange (C++14) declval (C++11) to_underlying (C++23) forward (C++11) forward_like (C++23) move (C++11) move_if_noexcept (C++11) as_const (C++17) Common vocabulary types pair tuple (C++11) optional (C++17) any (C++17) variant (C++17) tuple_size (C++11) tuple_element (C++11) apply (C++17) make_from_tuple (C++17) expected (C++23) Elementary string conversions to_chars (C++17) from_chars (C++17) chars_format (C++17)

 

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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)
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chrono I/O
parse (C++20)
C-style date and time

 

std::chrono::year

Member functions

year::year

year::operator++year::operator--

year::operator+=year::operator-=

year::operator+year::operator-

year::is_leap

year::operator int

year::ok

year::min

year::max

Nonmember functions

operator==operator<=>

operator+operator-

operator<<

from_stream

operator""y

Helper classes

formatter<std::chrono::year>

 

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

Compare the two std::chrono::year x and y.

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

Return value

1) int(x) == int(y)

2) int(x) <=> int(y)

Example

Run this code

#include <iostream>
#include <chrono>
 
int main()
{
    using namespace std::chrono;
 
    constexpr year y1{2020};
    constexpr year y2{2021};
 
    std::cout << std::boolalpha << (y1 != y2) << '\n';
 
    static_assert(
        (2020y < 2023y) && (2020y == 2020y) && (2020y <= 2023y) &&
        (2023y > 2020y) && (2023y != 2020y) && (2023y >= 2020y)
    );
}

Output:

true