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Tip of the Day
Language: C++
Expertise: Advanced
Mar 10, 1998

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Exception specification

A function that may throw an exception can warn its users about that by specifying a list of exceptions it may throw, thus helping its users to catch such exceptions appropriately:
 	int divide (int, int) throw(zerodivide); //may throw an 								//exception of 									//type zerodivide (but 								//no other). 
If your function is exception-safe, i.e., does never throw any exception, it can be declared like this:
 	bool equals (int, int) throw(); //promises not to throw any 						  //exception ever
Mind that a function declared like this:
 	bool equals (int, int); 
on the other hand, says nothing about its exceptions, so it may throw any type of exception or not throw any exception at all.
Danny Kalev
 
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