How would you handle exceptions in a constructor

How would you handle exceptions in a constructor

How would you handle exceptions in a constructor?

In handling exceptions in a constructor, it’s crucial to ensure that resources are properly managed. This can be achieved by using the “Resource Acquisition Is Initialization” (RAII) principle. In this approach, you acquire necessary resources during object initialization and release them in the destructor.

If an exception occurs during resource acquisition, the constructor should clean up any resources already acquired before re-throwing the exception. If the constructor fails, the destructor won’t run, so cleanup must occur within the constructor itself.

For example:

class MyClass {
public:
    MyClass() try : resource1(acquireResource1()), resource2(acquireResource2())
    {
        // Constructor body
    }
    catch (...)
    {
        releaseResource1(resource1);
        throw;
    }
private:
    Resource1 resource1;
    Resource2 resource2;
};
This code ensures that if acquireResource2() throws an exception, resource1 is released before the exception is propagated.