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1 Member functionshttps://www.cppreference.com/cpp/utility/optional/bad_optional_access#Member_functions
2 std::bad_optional_access::bad_optional_accesshttps://www.cppreference.com/cpp/utility/optional/bad_optional_access#std::bad_optional_access::bad_optional_access
2.1 Parametershttps://www.cppreference.com/cpp/utility/optional/bad_optional_access#Parameters
3 std::bad_optional_access::operator=https://www.cppreference.com/cpp/utility/optional/bad_optional_access#std::bad_optional_access::operator=
3.1 Parametershttps://www.cppreference.com/cpp/utility/optional/bad_optional_access#Parameters_2
3.2 Return valuehttps://www.cppreference.com/cpp/utility/optional/bad_optional_access#Return_value
4 std::bad_optional_access::whathttps://www.cppreference.com/cpp/utility/optional/bad_optional_access#std::bad_optional_access::what
4.1 Return valuehttps://www.cppreference.com/cpp/utility/optional/bad_optional_access#Return_value_2
4.2 Noteshttps://www.cppreference.com/cpp/utility/optional/bad_optional_access#Notes
5 Inherited from std::exceptionhttps://www.cppreference.com/cpp/utility/optional/bad_optional_access#Inherited_from_std::exception
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