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Violating an Exception Specification

Violating an Exception Specification

The implementation ensures that functions having an exception specification should throw only exceptions that are listed in their exception specification. For example:

 class X{};class Y{};void f() throw X{ throw Y(); // violation of exception specification}

By default, an attempt to throw an exception of a type that is not listed in the exception specification causes the std::unexpected() function to be called. std::unexpected() in turn calls terminate(), which terminates the program.

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