FreeBSD Manual Pages
std::unexpected_handler(3) C++ Standard Libary std::unexpected_handler(3) NAME std::unexpected_handler - std::unexpected_handler Synopsis Defined in header <exception> typedef void (*unexpected_handler)(); (deprecated in C++11) (removed in C++17) std::unexpected_handler is the function pointer type (pointer to function that takes no arguments and returns void), which is installed and queried by the functions std::set_unexpected and std::get_unexpected and called by std::unex- pected. The C++ implementation provides a default std::unexpected_handler function, which calls std::terminate(). If the null pointer value is installed (by means of std::set_unexpected), the implementation may restore the default handler instead. A user-defined std::unexpected_handler is expected to either termi- nate the program or throw an exception. If it throws an exception, one of the follow- ing three situations may be encountered: 1) the exception thrown by std::unexpected_handler satisfies the dy- namic exception specification that was violated earlier. The new exception is al- lowed to escape the function and stack unwinding continues. 2) the exception thrown by std::unexpected_handler still violates the exception specification: 2a) however, the exception specification allows std::bad_exception: the thrown exception object is destroyed, and std::bad_exception is constructed by the C++ runtime and thrown instead. 2b) the exception specification does not allow std::bad_exception: std::terminate() is called. See also unexpected function called when dynamic exception specification is (removed in C++17) violated (function) set_unexpected changes the function to be called by std::unexpected (removed in C++17) (function) get_unexpected obtains the current unexpected_handler (C++11)(removed in C++17) (function) http://cppreference.com 2022.07.31 std::unexpected_handler(3)
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=std::unexpected_handler&sektion=3&manpath=FreeBSD+Ports+15.0>