std::literals::chrono_literals:: operator""y

Forms a std::chrono::year literal representing a year in the proleptic Gregorian calendar .

Parameters

Return value

A std::chrono::year initialized from int ( y ) . If y is not in the range [ - 32767 , 32767 ] , the stored value is unspecified.

Possible implementation

constexpr std::chrono::year operator""y(unsigned long long y) noexcept
{
    return std::chrono::year(static_cast<int>(y));
}

Notes

This operator is declared in the namespace std :: literals :: chrono_literals , where both literals and chrono_literals are inline namespaces . Access to this operator can be gained with:

• using namespace std :: literals ,
• using namespace std :: chrono_literals , or
• using namespace std :: literals :: chrono_literals .

In addition, within the namespace std :: chrono , the directive using namespace literals :: chrono_literals ; is provided by the standard library , so that if a programmer uses using namespace std :: chrono ; to gain access to the classes in the chrono library , the corresponding literal operators become visible as well.

Example

#include <chrono>
#include <iostream>
 
int main()
{
    using namespace std::literals;
 
    std::cout << int(2020y)  << '\t' << 2020y  << '\n'
              << int(-220y)  << '\t' << -220y  << '\n'
              << int(3000y)  << '\t' << 3000y  << '\n'
              << int(32768y) << '\t' << 32768y << '\n'  // unspecified
              << int(65578y) << '\t' << 65578y << '\n'; // unspecified
}

2020	2020
-220	-0220
3000	3000
-32768	-32768 is not a valid year
42	0042

See also