Changing what an operator does dependent on data type

MrPickle · #1 (**permalink**) 05-09-2008, 10:50 AM

Is it possible to change what an operator does dependent on the variable to the right.

For example:

Code:

//A basic class
class MyClass{
   private:
      float a, b, c;
   public:
      MyClass();
      float operator+ (MyClass);
      //but also do this:
      float operator+ (float a);
};

Bench · #2 (**permalink**) 05-13-2008, 06:39 AM

Yes, that will work since operator overloading allows the same flexibility as overloading a function. (confined within the usual 'rules' of those operators of course)

You can also change an operator's behaviour dependent on the type of the either operand, externally from a class.

Code:

class foo
{
public:
   friend float operator+ (float, const foo&);
   friend float operator+ (int, const foo&);
};

float operator+ (float, const foo&);
float operator+ (int, const foo&);

MrPickle · #3 (**permalink**) 05-13-2008, 08:44 AM

Thank you

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MrPickle (05-13-2008)