Where to define exception classes, inside classes or on a higher level?

Posted by rve on Stack Overflow See other posts from Stack Overflow or by rve
Published on 2010-12-24T21:13:18Z Indexed on 2010/12/26 6:54 UTC
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Should exception classes be part of the class which may throw them or should they exist on a higher level?

For example :

class Test
{
    public:
        class FooException: public ExceptionBase { };
        void functionThrowingFooException();
};

or

class FooException: public ExceptionBase { };
class Test
{
    public:
        void functionThrowingFooException();
};

(functionThrowingFooException() is the only function to ever throw a FooException)

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