next-method.js

function inherit (_class, superclass) {
    _class.prototype.__proto__ = superclass.prototype;
}

function generic (name) {
    return function () {
	var _arguments = Array.prototype.slice.call(arguments);
	var object = _arguments[0];
	var methods = [];
	if (object.constructor.prototype.hasOwnProperty(name))
	    methods.push(object.constructor.prototype[name]);
	var proto = object;
	while ((proto = proto.__proto__)) {
	    if (proto.hasOwnProperty(name))
		methods.push(proto[name]);
	}
	for (var i = 0; i < methods.length; i++)
	    methods[i]['%next-method'] = methods[i+1];
	if (methods.length)
	    methods[0].apply(null, _arguments);
    };
}

function A () {}

A.prototype.initialize = function __method__ (object, a) {
    print("in A.initialize");
    print(!__method__['%next-method']);
    object.a = a;
};

function B () {};

inherit(B, A);

B.prototype.initialize = function __method__ (object, b) {
    print("in B.initialize");
    __method__['%next-method'](object, "a");
    object.b = b;
};

function C () {};

inherit(C, B);

function D () {};

inherit(D, C);

D.prototype.initialize = function __method__ (object, d) {
    print("in D.initialize");
    __method__['%next-method'](object, "b");
    object.d = d;
};


var initialize = generic('initialize');

var d = new D();
initialize(d, "d");
print(d.d == "d");
print(d.b == "b");
print(d.a == "a");