import std.stdio;

import MultiDisFunction;


class Shape { }

class Circle : Shape { }

class Rect : Shape { }



bool checkCollisionCC(Circle circle1, Circle circle2) {
	writefln("in checkCollisionCC");
	return false; 
}

bool checkCollisionCR(Circle circle, Rect rect) {
	writefln("in checkCollisionCR");
	return true; 
}

bool checkCollisionRC(Rect rect, Circle circle) {
	writefln("in checkCollisionRC");
	return checkCollisionCR(circle, rect); 
}

bool checkCollisionRR(Rect rect1, Rect rect2) {
	writefln("in checkCollisionRR");
	return false; 
}


// test functions:
char someOtherFunc1(Rect rect1, Rect rect2) { return 1; }
bool someOtherFunc2(Object obj1, int obj2) { return 1; }
bool someOtherFunc3(Object obj1, Object obj2) { return 1; }
bool someOtherFunc4(Object obj1, Object obj2, Object obj3) { return 1; }



/***** MDF Usage *****/

static this() {

	// Define the MDF dispatcher
	MultiDispatchFunction!(bool function(Shape, Shape)) checkCollisionMDF;
	

	// IFTI doesn't work here:
	//checkCollisionMDF.AddDispatch(&checkCollisionCC);
	
	checkCollisionMDF.AddDispatch!(typeof(&checkCollisionCC))(&checkCollisionCC);
	checkCollisionMDF.AddDispatch!(typeof(&checkCollisionCR))(&checkCollisionCR);
	checkCollisionMDF.AddDispatch!(typeof(&checkCollisionRC))(&checkCollisionRC);
	checkCollisionMDF.AddDispatch!(typeof(&checkCollisionRR))(&checkCollisionRR);



	checkCollisionMDF.call(new Circle, new Circle);
	checkCollisionMDF.call(new Rect, new Rect);
	checkCollisionMDF.call(new Circle, new Rect);
	checkCollisionMDF.call(new Rect, new Circle);
	checkCollisionMDF.call(new Rect, typeid(void)); // should fail
}