std::bad_optional_access - Exception class thrown when a disengaged optional object is dereferenced.

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                                                    libstdc++                     std::bad_optional_access(3cxx)

       Exception class thrown when a disengaged optional object is dereferenced.

constchar*std::bad_optional_access::what()const[inline],[override],[virtual],[noexcept]
       Returns a C-style character string describing the general cause of the current error.

       Reimplemented from std::exception.

       std::bad_optional_access - Exception class thrown when a disengaged optional object is dereferenced.

       #include <optional>

       Inherits std::exception.

   PublicMemberFunctions
       const char * what () const noexcept override