std::chrono::year::is_leap

 

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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

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operator==operator<=>

operator+operator-

operator<<

from_stream

Helper classes

formatter<std::chrono::year>

 

constexpr bool is_leap() const noexcept;		(since C++20)

Determines if *this represents a leap year in the proleptic Gregorian calendar.

*this represents a leap year if the stored year value

• is divisible by 4 and not divisible by 100; or
• is divisible by 400.

Return value

true if *this represents a leap year, otherwise false.

Example

Run this code

#include <iostream>
#include <chrono>
 
int main()
{
    using namespace std::chrono;
 
    for (const year y : {2020y, 2021y, 2000y, 3000y}) {
        std::cout 
            << static_cast<int>(y) << " is "
            << (y.is_leap() ? "" : "not ")
            << "a leap year\n";
    }
}

Output:

2020 is a leap year
2021 is not a leap year
2000 is a leap year
3000 is not a leap year