std::exception(3) C++ Standard Libary std::exception(3) NAME std::exception - std::exception Synopsis Defined in header <exception> class exception; Provides consistent interface to handle errors through the throw expres- sion. All exceptions generated by the standard library inherit from std::ex- ception. Member functions constructor constructs the exception object (public member function) destructor destroys the exception object [virtual] (virtual public member function) operator= copies exception object (public member function) what returns an explanatory string [virtual] (virtual public member function) Standard exception requirements Each standard library class T that derives from std::exception has the following publicly accessible member functions, each of them do not exit with an exception (until C++11) having a non-throwing exception specification (since C++11): * default constructor (unless other constructors are provided) * copy constructor * copy assignment operator The copy constructor and the copy assignment operator meet the following postcondition: * If two objects lhs and rhs both have dynamic type T and lhs is a copy of rhs, then std::strcmp(lhs.what(), rhs.what()) is equal to 0. The what() member function of each such T satisfies the constraints specified for std::exception::what(). Standard exceptions * logic_error * invalid_argument * domain_error * length_error * out_of_range * future_error (since C++11) * runtime_error * range_error * overflow_error * underflow_error * regex_error (since C++11) * system_error (since C++11) * ios_base::failure (since C++11) * filesystem::filesystem_error (since C++17) * tx_exception (TM TS) * nonexistent_local_time (since C++20) * ambiguous_local_time (since C++20) * format_error (since C++20) * bad_typeid * bad_cast * bad_any_cast (since C++17) * bad_optional_access (since C++17) * bad_expected_access (since C++23) * bad_weak_ptr (since C++11) * bad_function_call (since C++11) * bad_alloc * bad_array_new_length (since C++11) * bad_exception * ios_base::failure (until C++11) * bad_variant_access (since C++17) Defect reports The following behavior-changing defect reports were applied retroac- tively to previously published C++ standards. DR Applied to Behavior as published Cor- rect behavior LWG 471 C++98 there was no requirement on standard library added classes derived from std::exception http://cppreference.com 2024.06.10 std::exception(3)
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