Re: Question about exceptions.
On Sep 10, 12:49 am, "BobR" <removeBadB...@worldnet.att.net> wrote:
LR wrote in message...
Is this code valid? And if so, what should the output be?
[...]
class X {
int k;
public:
X(const int a) try : k(divide(a)){
std::cout << "X(" << a << ")" << std::endl;
}
catch(const std::exception &) {
std::cout << "Caught by X(" << a << ")" << std::endl;
// throw; // add this (after first test run)
}
};
The throw isn't necessary; it's the default behavior here. See
=A715.3 ([Handling an Exception), para. 15: "The currently handled
exception is rethrown if control reaches the end of a handler of
the function-try-block of a constructor or destructor.
Otherwise, a function returns when control reaches the end of a
handler for the functiontryblock. Flowing off the end of a
function-try-block is equivalent to a return with no value; this
results in undefined behavior in a value-returning function."
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