std::chrono::operator==,<=>(std::chrono::year_month)
From cppreference.com
< cpp | chrono | year month
Defined in header <chrono>
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constexpr bool operator==( const std::chrono::year_month& x, const std::chrono::year_month& y ) noexcept; |
(1) | (since C++20) |
constexpr std::strong_ordering operator<=>( const std::chrono::year_month& x, const std::chrono::year_month& y ) noexcept; |
(2) | (since C++20) |
Compares the two year_month
values x and y.
The <
, <=
, >
, >=
, and !=
operators are synthesized from operator<=> and operator== respectively.
[edit] 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()
[edit] Example
Run this code
#include <chrono> #include <iostream> int main() { using namespace std::chrono; constexpr year_month ym1{year(2021), month(7)}; constexpr year_month ym2{year(2021)/7}; static_assert(ym1 == ym2); std::cout << ym1 << '\n'; static_assert((2020y/1 < 2020y/2) && (2020y/2 == 2020y/2) && (2020y/3 <= 2021y/3) && (2023y/1 > 2020y/2) && (3020y/2 != 2020y/2) && (2020y/3 >= 2020y/3)); }
Output:
2021/Jul