std::chrono::operator==,<=>(std::chrono::year_month)
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< cpp | chrono | year month
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std::chrono::year_month
Member functions
Nonmember functions
operator==operator<=>
Helper classes
(C++26)
Defined in header
<chrono>
constexpr bool operator==( const std::chrono::year_month & x,
const std::chrono::year_month & y ) noexcept;
(1)
(since C++20)
const std::chrono::year_month & y ) noexcept;
constexpr std::strong_ordering operator<=>( const std::chrono::year_month & x,
const std::chrono::year_month & y ) noexcept;
(2)
(since C++20)
const std::chrono::year_month & y ) noexcept;
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