std::exception - Base class for all library exceptions.

       Generated automatically by Doxygen for libstdc++ from the source code.

                                                    libstdc++                               std::exception(3cxx)

       Base class for all library exceptions.

       This is the base class for all exceptions thrown by the standard library, and by certain language
       expressions. You are free to derive your own exception classes, or use a different hierarchy, or to throw
       non-class data (e.g., fundamental types).

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

       Reimplemented in std::ios_base::failure, std::bad_alloc, std::bad_any_cast,
       std::filesystem::filesystem_error, std::bad_weak_ptr, std::bad_function_call,
       std::experimental::fundamentals_v1::bad_any_cast, std::experimental::filesystem::v1::filesystem_error,
       std::future_error, std::logic_error, std::runtime_error, std::bad_exception, std::bad_cast,
       std::bad_typeid, and std::bad_optional_access.

       std::exception - Base class for all library exceptions.

       #include <exception>

       Inherited by __gnu_cxx::__concurrence_broadcast_error, __gnu_cxx::__concurrence_lock_error,
       __gnu_cxx::__concurrence_unlock_error, __gnu_cxx::__concurrence_wait_error, __gnu_cxx::forced_error,
       std::bad_alloc, std::bad_cast, std::bad_exception, std::bad_function_call, std::bad_optional_access,
       std::bad_typeid, std::bad_variant_access, std::bad_weak_ptr, std::ios_base::failure, std::logic_error,
       and std::runtime_error.

   PublicMemberFunctionsexception (const exception &)=defaultexception (exception &&)=defaultexception & operator= (const exception &)=defaultexception & operator= (exception &&)=defaultvirtual const char * what () const noexcept