In the new proposed standard for C++, for the functions, which are taking empty number of arguments, now it can be called without paranthesis . It gives a look of property of classes, offer by languages like C#. See the example below
int GetBkColor () implicit { return 0; }�
// The above function can be called as�
int nDrawColor = GetBkColor; // No paranthesis required
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Implicit function calls can be used with classes for getting and setting properties.
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class Square {
public:
double & side() implicit { return side_; }
// …
private:
double side_; // length in cm
};
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Square s;
s.side = 5.0; // set value
cin >> s.side; // set value
cout<< s.side; // get value�
In the above example making the function non-const will enable itself to get and set the values.