I wonder whether (and how) it's possible to catch an exception thrown in a member destructor. Example:
#include <exception>
class A
{
public:
~A() {
throw std::exception("I give up!");
}
};
class B
{
A _a;
public:
~B() {
// How to catch exceptions from member destructors?
}
};
Yes, you can catch such an exception, using the function-try-block:
class B
{
A _a;
public:
~B() try {
// destructor body
}
catch (const std::exception& e)
{
// do (limited) stuff
}
};
However, you cannot really do much with such an exception. The standard specifies that you cannot access non-static data members or base classes of the B
object.
Also, you cannot silence the exception. Unlike with other functions, the exception will be re-thrown implicitly once the function-try-block handler of a destructor (or constructor) finishes execution.
All in all, destructors should really not throw exceptions.