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

      From cppreference.com
      <cpp‎ |chrono‎ |year
       
       
      Date and time library
       
       
      constexprstd::chrono::year& operator++()noexcept;
      (1)(since C++20)
      constexprstd::chrono::year operator++(int)noexcept;
      (2)(since C++20)
      constexprstd::chrono::year& operator--()noexcept;
      (3)(since C++20)
      constexprstd::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};.

      Contents

      [edit]Parameters

      (none)

      [edit]Return value

      1,3) A reference to thisyear after modification.
      2,4) A copy of theyear made before modification.

      [edit]Notes

      If the result would be outside the range[-3276732767], the actual stored value is unspecified.

      [edit]Example

      Run this code
      #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'; usingnamespace std::literals::chrono_literals;    y= 32767y;    y++;//← unspecified, see ↑ Notes ↑std::cout<<static_cast<int>(y)<<'\n';}

      Possible output:

      true true-32768

      [edit]See also

      adds or subtracts a number of years from ayear
      (public member function)[edit]
      performs arithmetic onyears
      (function)[edit]
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/chrono/year/operator_inc_dec&oldid=157536"

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