operator overloading and extension method for a C++ component

Question

I have created a public C++ value class (shared with C#):

public value struct float2
{
	float x,y;
};
float2 operator+(float2& a, float2& b)
{
	float2 r;
	r.x = a.x + b.x;
	r.y = a.y + b.y;
	return r;
}
float length(float2& a) { return sqrt(a.x*a.x+a.y*a.y); }

and I have a '+' operator that I can use in c++ and a length function. Unfortunately they are not available in C#!

So I have to redefine method in C# to do just that...

I wonder if there is a more elegant way?

Answer 1

Hi,

I think you should achieve the simple operator function in C#.

    public struct Complex
    {
        public int real;
        public int imaginary;

        public Complex(int real, int imaginary)
        {
            this.real = real;
            this.imaginary = imaginary;
        }
        public static Complex operator +(Complex c1, Complex c2)
        {
            return new Complex(c1.real + c2.real, c1.imaginary + c2.imaginary);
        }

    }


            Complex num1 = new Complex(2, 3);
            Complex num2 = new Complex(3, 4);

            //Add two Complex objects (num1 and num2) through the overloaded plus operator:
            Complex sum_Add = num1 + num2;

WRL is based on COM, I don't think we can use operator overload in COM. So that we need a named function for operator.

Best regards,
Jesse

---

Jesse Jiang
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Answer 2

What i thought, can't do that in my C++ component.. :/

That's ok, I already implemented some interesting C# extension methods!