W3cubDocs

/C++

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

constexpr std::chrono::year& operator++() noexcept;	(1)	(since C++20)
constexpr std::chrono::year operator++(int) noexcept;	(2)	(since C++20)
constexpr std::chrono::year& operator--() noexcept;	(3)	(since C++20)
constexpr std::chrono::year operator--(int) noexcept;	(4)	(since C++20)

Adds or subtracts 1 from the year value.

1-2) Performs *this += std::chrono::years{1};

3-4) Performs *this -= std::chrono::years{1};

(none).

1,3) a reference to this year after modification

2,4) a copy of the year made before modification

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

operator+=operator-=	adds or subtracts a number of years from a `year` (public member function)
operator+operator-	performs arithmetic on `year`s (public member function)