std::chrono::year::operator++, std::chrono::year::operator--

Since C++20

Adds or subtracts 1 from the year value.

# Declarations

constexpr std::chrono::year& operator++() noexcept;

(since C++20)

constexpr std::chrono::year operator++( int ) noexcept;

(since C++20)

constexpr std::chrono::year& operator--() noexcept;

(since C++20)

constexpr std::chrono::year operator--( int ) noexcept;

(since C++20)

# Notes

If the result would be outside the range [-32767,32767], the actual stored value is unspecified.

# Example

#include <chrono>
#include <iostream>
 
int main()
{
    std::cout << std::boolalpha;
 
    std::chrono::year y{2020};
    std::cout << (++y == std::chrono::year(2021)) << ' ';
    std::cout << (--y == std::chrono::year(2020)) << '\n';
 
    using namespace std::literals::chrono_literals;
    y = 32767y;
    y++; //← unspecified, see ↑ Notes ↑
    std::cout << static_cast<int>(y) << '\n';
}

# See also