Ceylon: Comparable interface and Comparison Class

	/**
	You can use the comparison operators
	<
	<=
	>
	>=
	for all Classes satisfying the Comparable interface.
	But Ceylon provides a nifty fourth operator, <=> which is the compare operator.
	This results in one of the singleton instances (equal, smaller or larger) of the class Comparison.
	**/
	void comparison_demo() {
	Boolean isFiveLargerThan2 = 5 > 2;
	print("isFiveLargerThan2 is ``isFiveLargerThan2``");
	Integer age = 37;
	switch(age <=> 50)
	case (smaller) { print("age is smaller than 50");}
	case (equal) {print("age is equal to 50");}
	case (larger) {print("age is larger than 50");}
	//just to double check !!
	Comparison comparison = age <=> 20; //compiles fine :)
	}

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