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Registering a Function with std::set_unexpected

Registering a Function with std::set_unexpected

set_unexpected() takes a pointer to a user-defined function of the following type:

 typedef void (*handler)();

Use set_unexpected() to register a user-defined routine that will be invoked when a function throws an exception not listed in its exception specification, use set_unexpected(). For example:

 #include void my_handler() // will be called instead of terminate(){ write_to_log("a violation of an exception specification"); // additional cleanup operations

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