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      std::chrono::year::ok

      From cppreference.com
      <cpp‎ |chrono‎ |year
       
       
      Date and time library
       
       
      constexprbool ok()constnoexcept;
      (since C++20)

      Checks if the year value stored in*this is in the valid range, i.e.,[-3276732767].

      [edit]Return value

      true if the year value stored in*this is in the range[-3276732767]. Otherwisefalse.

      [edit]Possible implementation

      See the implementations inlibstdc++,libc++,and Howard Hinnant'sdate.h.

      class Year{short year_;// exposition-only public: bool ok()constnoexcept{return year_!=std::numeric_limits<short>::min();} /*...*/};

      [edit]Example

      Run this code
      #include <chrono>#include <iomanip>#include <iostream> int main(){std::cout<<"input year │ internal value │ ok()\n"<<std::boolalpha; for(constint i:{2020,0x8000,0x8001,0xFFFF,0x18000}){conststd::chrono::year y{i};std::cout<<std::setw(10)<< i<<" │ "<<std::setw(14)<<static_cast<int>(y)<<" │ "<< y.ok()<<'\n';}}

      Possible output:

      input year │ internal value │ ok()      2020 │           2020 │ true     32768 │         -32768 │ false     32769 │         -32767 │ true     65535 │             -1 │ true     98304 │         -32768 │ false
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/chrono/year/ok&oldid=156895"

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