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Can anyone explain Exception Specifications as used in C++ ?
When are they used (I have rarely seen it used in code)
Hopefully never as they are deprecated in the next version of C++ due for standardization next year.
What are the pros and cons (benefits/disadvantages) of using exception specifications?
They provide a way for readers of your code to know exactly what exceptions a function is allowed to throw. The problem is, that if an unexpected exception (one not in the specification) is thrown, then the program will be terminated (by default).