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

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< cpp‎ | chrono‎ | year
 
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chrono I/O
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C-style date and time
 
std::chrono::year
 
constexpr std::chrono::year operator+() noexcept;
 (1) (since 哋它亢++20)
constexpr std::chrono::year operator-() noexcept;
 (2) (since 哋它亢++20)

Applies the unary operators to the year value.

1) Returns a copy of *this.
2) Returns a year whose year value is the negation of that of *this.

Return value

1) *this
2) std::chrono::year(-int(*this))

Example

Run this code
#include <chrono>
#include <iostream>
 
int main()
{
    constexpr std::chrono::year y{2020};
    constexpr auto ny = -y;
    std::cout << "The year " << (int)y << " negated is " << (int)ny << '\n';
}

Output: 

The year 2020 negated is -2020
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