JavaScript OOP with virtual, private, protected and public members

Everything you need to do OOP in one neat little package without having to do all the work by hand. Almost like C++.

Here is how you would use it:

var A = Object.extend("A",
      {"static" :
        {"counter_start" : 5 // all static propertiers and methods should
                             // be initialized
        ,"get_counter" : function () {
            var cnt = this.counter_start;
            this.get_counter = function () { return ++cnt; };
            return cnt;
          }
        }
      ,"public" :
        {"a_public_property_of_A" : ("This value does not matter. It will be"
           +"initialize with undefined before the constructor is called.")
        ,"constructor" : function (a, other) { this.id(A.get_counter()); this.a_public_property_of_A(a); }
        ,"$virtual_method" : function () {return this.a_public_property_of_A(); }
        ,"print" : function () { console.message("The value is "+this.virtual_method()); }
        }
    //,"protected" : {}
      ,"private" :
        {"id" : "does not matter" }
      });

var B = A.extend("B",
      {//"static" : {},
       "public" :
        {"base_constructor_arguments" :
          function () { var arg_A = [arguments[0], "other"]; return arg_A; }
        ,"constructor" : function (b) {}
        ,"$virtual_method" : function () {return this.a_public_property_of_A() * 100; }
        }
    //,"protected" : {}
    //,"private" : {}
      });
// *
// *  - Example of object instantiation:

var a = (new A(3)).constructor();
a.print();
var b = (new B(5)).constructor();
b.print();
b.$uper.print();

var old_val = b.a_public_property();     // getting a property
var new_val = b.a_public_property(1000); // setting a property
console.log("the old value is "+old_val);
console.log("the new value is "+new_val);

Here are a few of the members shared by all objects:

• instance_of(_class)

• cast_to(_class)

• dynamic_cast(_class)

• type_info_name()

• clone()

• $uper

Any idea on what coul

This, is really really cool. It's good to see a somewhat proper implementation of Object-Oriented-Programming in Javascript.

The only small tip I really have is to add some comments. Right now, the only comment I see is the small "about", and the usage information. Preferably you should add some comments over your methods/functions, and any code blocks that may be harder to understand.

StackExchange Code Review Q#80457, answer score: 2