std::exception

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Defined in header <exception>
class exception;

Provides consistent interface to handle errors through the throw expression.

All exceptions generated by the standard library inherit from std::exception.

Member functions

constructs the exception object
(public member function)
[virtual]
destroys the exception object
(virtual public member function)
copies exception object
(public member function)
[virtual]
returns an explanatory string
(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++20)having a non-throwing exception specification (since C++20):

(since C++20)

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().

(since C++20)

Standard exceptions

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR Applied to Behavior as published Correct behavior
LWG 471 C++98 there was no requirement on standard library classes derived from std::exception added