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

constexpr std::chrono::year operator ""y( unsigned long long y ) noexcept;

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 <iostream>
#include <chrono>
 
int main()
{
    using namespace std::literals;
 
    std::cout 
        << int(2020y) << ' '
        << int(-220y) << ' '
        << int(3000y) << ' '
        << int(32768y) << ' '    // unspecified
        << int(65578y) << '\n';  // unspecified
}

2020 -220 3000 -32768 42

See also