C / C++ / MFC

"Given an appropriate overloaded function-call operator, however, this syntax 
can be used to offset the x coordinate 3 units and the y 
coordinate 2 units. The following code shows such a definition:"

<pre>// function_call.cpp
class Point
{
public:
    Point() { _x = _y = 0; }
    Point &operator()( int dx, int dy )
        { _x += dx; _y += dy; return *this; }
private:
    int _x, _y;
};

int main()
{
   Point pt;
   pt( 3, 2 );
}

Mark Salsbery
Microsoft MVP - Visual C++

Mark Salsbery wrote:

Every time this comes up (function call operator) I'm reminded how lame the
example is in the Visual C++ documentation:

Mark Salsbery wrote:

Thanks much for the link (and the wiki link) Seriously.

Mark Salsbery wrote:

Are you the posting police?

2 bugs found.
> recompile ...
65534 bugs found.

emilio_grv wrote:

Like many MS MVP you're convinced MS documentations about languages is the Bible.

Mark Salsbery
Microsoft MVP - Visual C++

emilio_grv wrote:

I don't see any need

yadrif wrote:

So, what is the purpose of oerloading the () operator

emilio_grv wrote:

such pointer should never be NULL