Order of destruction for Array of Objects

Question

class MyClass
{
};

void foo
{
    MyClass arr[10]; 
}

I want to know the order of destruction of array objects when function returns.

I read it More Effective C++ about it and it says that destructor are invoked in reverse order to that of constructor order as follows:

for(int i = 9 ; i >= 0 ;i--)
{
    arr[i].MyClass::~MyClass();
}

Can anybody tell me the reason for it ?

Answer 1

That's continuation of reverse order of destructor invokation filosophy of C++. When stack-allocated objects are destroyed it is done in reverse order to facilitate RAII. Although that is not really necessary for array elements (they are all constructed with the default constructors and any order of construction/destruction would do) the same is done with them just for consistency.