std::chrono::month_day::ok(3) - FreeBSD Ports 15.1.quarterly Manual Pages

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std::chrono::month_day::ok(3)  C++ Standard Libary std::chrono::month_day::ok(3)

NAME
     std::chrono::month_day::ok - std::chrono::month_day::ok

Synopsis
	constexpr bool ok() const noexcept;  (since C++20)

	Determines whether this month_day stores a valid month-day combination.

	The   combination   is	 valid	if  month()  represents  a  valid  month
     (month().ok() == true),
	unsigned{day()} >= 1, and unsigned{day()} <= D, where D is the number of
     days in the
	month represented by month(). The number of days in February is  consid-
     ered to be 29.

Return value
	true if the month and day combination is valid, otherwise false.

Example
     // Run this code

      #include <chrono>
      #include <iostream>

      int main()
      {
	  std::cout << std::boolalpha;

	  constexpr auto md1{std::chrono::July/15};
	  std::cout << (md1.ok()) << ' ';
	  constexpr	 std::chrono::month_day      md2{std::chrono::month(14),
     std::chrono::day(42)};
	  std::cout << (md2.ok()) << ' ';
	  constexpr auto md3{std::chrono::February/29};
	  std::cout << (md3.ok()) << '\n';
      }

Output:
      true false true

http://cppreference.com 	   2024.06.10	   std::chrono::month_day::ok(3)

NAME | Synopsis | Return value | Example | Output:

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