Explicit Call to a Constructor

Question

I know the concept that we can call the Constructor both Explicitly and Implicitly, and i have tested both the scenarios(generally till now my all purp

Answer 1

I hate to say this, because it is so perverse, but there is an additional way to explicitly call the constructor.

class integer
{
   int m ,n;
 public:
   integer (int x , int y); 
};
integer :: integer (int x , int y )
{
   m=x; n = y;
}

The constructor can be explicitly called on an already-constructed object.

integer i(1,100);
i.~integer();
i.integer::integer(2,200);

Here I've constructed (explicitly) an instance of integer. Then I've explicitly called its destructor. Then I've explicitly called the constructor again. I suppose you might use this idiom in testing. I am not aware of any place in the standard that forbids it. It works in Visual Studio 2010. I haven't tested a really wide range of compilers.

These calls are explicit for large values of 'explicit'.